The linear core thickness (S) is 0 to 0.100 D. The linear core thickness (S) is the distance dimension in a perpendicular direction between a corner part (55) of a cutting edge (5A) and a corner part (55) of a second cutting edge (5B). When a body (3) is viewed from the tip side, a first groove bottom part (81) and a second groove bottom part (82) are provided on inner surfaces of each of the discharge grooves (4A, 4B). The first groove bottom part (81) having a curved shape is provided on a first inner surface (41). The second groove bottom part (82) having a curved shape is provided on a second inner surface (42). The second inner surface (42) among the inner surfaces of each of the discharge grooves (4A, 4B) faces in the direction opposite the rotation direction (T).
The present invention provides a tap having a back taper and having an improved breaking strength and improved torsional rigidity. A tap 10 has a biting part 18 and a complete thread part 16. In the complete thread part 16, the angle θ1 of the thread changes. The decreasing amount of the valley diameter in the complete thread part 16 due to the change in the angle θ1 of the thread is configured to be smaller than the decreasing amount of the outside diameter. With this configuration, while the complete thread part is formed to have a back taper shape, it is possible to increase a self-guiding property and to improve breaking strength and torsional rigidity.
Provided is a thread mill that can reduce tilting of an internal thread to be machined, thus increasing the tool life. A thread mill includes a plurality of thread cutting edges that are circumferentially spaced apart on a front end side of an outer circumference of a tool body, and a plurality of end cutting edges formed at the front end of the tool body. A functional cutting edge portion that cuts a workpiece, and a non-functional cutting edge portion that is relieved toward an axial shank end relative to a trajectory of the functional cutting edge portion when the tool body is caused to make one rotation about an axis are formed on the plurality of end cutting edges.
NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Takikawa Hirofumi
Sano Genki
Watanabe Seiya
Gima Hiroki
Hattori Takahiro
Hanyu Hiroyuki
Abrégé
[Problem] The present invention provides a film forming apparatus having a structure with which it is possible to stably generate a vacuum arc discharge. [Solution] Disclosed is a film forming apparatus comprising, in a vacuum chamber, a cathode part 11, an anode part 12, and a magnetic field generator 6 for applying a magnetic field to the anode part. A vacuum arc discharge is generated between the cathode and the anode so as to generate plasma, and the cathode material is evaporated and the plasma is transported along the anode part, so that a film which contains a material substance that constitutes the cathode material is vapor-deposited on the surface of an object to be processed. The anode part has a hollow shape through which plasma can pass, and is provided with an auxiliary anode member 8 which is electrically connected to the anode and projects to the inside of the hollow shape.
A thread forming tap (1) is provided with a male thread portion (3), a groove, and an inside diameter finishing blade (61). A chamfer portion (31) of the male thread portion (3) is provided continuous with the complete thread portion (32) and decreases in diameter toward a tip end. The groove is provided parallel to a shaft center spanning the complete thread portion (32) and the chamfer portion (31) so as to divide a thread (71) of the male thread portion (3). On the chamfer portion (31) and the complete thread portion (32), the inside diameter finishing blade (61) is provided along an open edge of the groove on the side opposite the rotational direction of the thread forming tap (1). The inside diameter finishing blade (61) cuts and removes a crest portion of the female thread formed on a surface layer of a pilot hole (90). The height of a first step finishing blade (611) of the inside diameter finishing blade (61) on the chamfer portion (31) is lower than the height of a second step finishing blade (612) of the inside diameter finishing blade (61) formed on a portion corresponding to a thread (71) on the tip-most end of the complete thread portion (32).
NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Takikawa Hirofumi
Watanabe Seiya
Hattori Takahiro
Gima Hiroki
Hanyu Hiroyuki
Abrégé
[Problem] To provide a vacuum arc discharge generator capable of guiding the position where a cathode material evaporates within a wide range and consuming the entire surface of a cathode surface, and a cathode for use in said vacuum arc discharge generator. [Solution] A vacuum arc discharge generator provided to a vacuum arc vapor deposition apparatus for performing arc discharge between a cathode and an anode connected via a power source in a vacuum to generate plasma and evaporating a cathode material constituting the cathode to perform vapor deposition, the vacuum arc discharge generator being used for generating and maintaining vacuum arc discharge plasma, and comprising a cathode 11 mainly composed of graphite as an evaporation source and a trigger electrode disposed to induce arc discharge. The cathode is provided with a cathode-surface surface 11A, the cathode-surface surface is provided with one or more continuous long groove parts 5, and, by configuring the groove parts to be adjacent to each other at a prescribed pitch P, one or more continuous raised parts 6 are formed between the adjacent groove parts.
Provided are a measuring instrument and a measurement method that make it possible to improve measurement accuracy of the central axis position of an internal thread. Since the pitch p of an external thread 12 in a shaft portion 11 of a measuring instrument 10 is different from the pitch P of an internal thread 31 in a specific standard, when the shaft portion 11 is fitted into the internal thread 31 while rotating the measuring instrument 10, flanks 13, 33 of the external thread 12 and the internal thread 31 come into contact at two corresponding positions spaced apart in the axial direction, thereby stopping rotation of the measuring instrument 10. As a result, in a method for measuring the central axis C2 position of the internal thread 31 by, for example, applying a stylus 40 to a plug portion 15 of the measuring instrument 10 fitted into the internal thread 31, it is possible to improve the measurement accuracy.
G01B 21/00 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative
G01B 3/48 - Calibres à tampon pour les dimensions intérieures avec des surfaces de contact dont l'écartement est fixe, mais peut être réglé à l'avance pour filetage intérieur
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps; metalworking machines and tools, namely, drills; metalworking machines and tools, namely, drill bits; steel taps being parts of high-speed tools for metalworking; steel drills being parts of high-speed tools for metalworking; steel drill bits being parts of high-speed tools for metalworking; cemented carbide tools for metalworking; cemented carbide cutting tools; cemented carbide taps for metalworking; cemented carbide drills for metalworking; cemented carbide drill bits for metalworking; wear resistant tools for metalworking.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps; metalworking machines and tools, namely, drills; metalworking machines and tools, namely, drill bits; steel taps being parts of high-speed tools for metalworking; steel drills being parts of high-speed tools for metalworking; steel drill bits being parts of high-speed tools for metalworking; cemented carbide tools for metalworking; cemented carbide cutting tools; cemented carbide taps for metalworking; cemented carbide drills for metalworking; cemented carbide drill bits for metalworking; wear resistant tools for metalworking.
NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Takikawa Hirofumi
Bando Takahiro
Watanabe Seiya
Sano Genki
Gima Hiroki
Hattori Takahiro
Hanyu Hiroyuki
Abrégé
[Problem] To provide a device that can use a plurality of trigger electrodes without having a complicated structure and that can produce an arc discharge even after significant local depletion. [Solution] An evaporation source device for vacuum arc vapor deposition according to the present invention comprises a negative electrode 11 that is an evaporation source and a plurality of trigger electrodes 5a–5c that are provided opposite a discharge surface 11a of the negative electrode to induce arc discharge. The plurality of trigger electrodes are supported by the same rotary shaft 6, and at least one of the tips of the plurality of trigger electrodes can be brought into contact with the discharge surface of the negative electrode by rotation of the rotary shaft. The plurality of trigger electrodes are arranged such that one trigger electrode is opposite each of a plurality of section regions that are formed by sectioning the discharge surface into arbitrary regions in accordance with the number of trigger electrodes. A vacuum arc vapor deposition device according to the present invention has the evaporation source device installed at a plasma generation means.
A point tap (10) is provided with a threaded part (14) and a groove (20). The threaded part (14) is provided with a chamfer part (16) and a full thread part (18). The groove (20) is provided with a primary groove (21) and a secondary groove (22). The primary groove (21) is provided in the full thread part (18). The secondary groove (22) is provided in the chamfer part (16). The secondary groove (22) is twisted in a direction opposite to the rotation direction of the threaded part (14). The primary groove (21) is twisted in the same direction as the rotation direction of the point tap (10). The threaded part (14) is provided with a back taper and an eccentric relief. The effective diameter of the threaded part (14) decreases toward a shank part (12) side.
This point tap (10) comprises a screw portion (14) and a groove (20). The screw portion (14) comprises a chamfer portion (16) and a complete thread portion (18). The groove (20) comprises a primary groove (21) and a secondary groove (22). The primary groove (21) is provided to the complete thread portion (18). The secondary groove (22) is provided to the chamfer portion (16). The secondary groove (22) is twisted in the opposite direction from the rotation direction of the screw portion (14). The primary groove (21) is twisted in the same direction as the rotation direction of the point tap (10).
NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Takikawa, Hirofumi
Bando, Takahiro
Saiki, Yoshinori
Kito, Jumpei
Hashimoto, Yuki
Sugita, Hiroaki
Gima, Hiroki
Abrégé
A film-forming device forms a film by vapor deposition on an object's surface to be treated by vaporizing a cathode material constituting a cathode by a plasma generator which generates plasma by an arc discharge. The plasma generator includes a cathode part, an anode part arranged at an appropriate distance from the cathode part, a magnetic field generator and a protection member. The magnet field generator is constituted by the anode part or constituted integrally with or continuously from the anode part and generates a magnetic field by an electric current of the arc discharge. The protection member is constituted by part of the anode part, or constituted independently from the anode part while electrically connected to the anode part, and arranged outside a plasma flow region and protects part or a whole of the magnetic field generator from attachment of the cathode material.
A thread-forming tap 10 has a thread part 14 including: a complete thread part 24; and a chamfer part 22 which is provided contiguous to the complete thread part 24 and which tapers towards the tip. A plurality of lobe parts 18 are provided on the thread part 14 in the circumferential direction. Each of the lobe parts 18 includes a pressing section 18a, a crest section 18b, and a relief section 18c. In the pressing section 18a of each lobe part 18, a mountain shape 28a in a cross-section including an axis-C direction of the thread-forming tap 10 changes in the circumferential direction, so that the contact manner of the lobe part 18 with a working material improves, and cooling performance is improved. As a result of these, a highly durable thread-forming tap 10 can be provided.
End mill is provided with outer periphery cutting edges and end cutting edges along spiral flutes. Spiral flutes include first and second flutes. Flute bottom of first flute is with linear portion, R-shaped portion, and gradient portion. The linear portion extends in parallel to axis line O and in straight-line shape, from tool distal end toward rear end side to position separated from the tool distal end by length corresponding to tool outer diameter. The gradient portion is provided to the rear end side, and is inclined straightly toward outer side in radial direction toward the rear end side. The R-shaped portion connects rear end of the linear portion and front end of the gradient portion, and is curved in circular arc shape toward the outer side in the radial direction. Rake angles of the outer periphery and end cutting edges are constant over entire periphery.
Large diameter edges formed in arc shapes having curvature radii larger than a ball radius are provided. This allows improving surface roughness of a machined surface by cutting of a planar surface with the respective large diameter edges compared with cutting of a planar surface with a ball end cutting edge formed in an arc shape having a single curvature radius. Further, since the respective large diameter edges are formed in the arc shape, compared with cutting of a curved surface with linear cutting edges, surface roughness of a machined surface can be improved by cutting a curved surface with the respective large diameter edges. Accordingly, a pick feed during the cutting of the planar surface and the curved surface with the respective large diameter edges can be increased, and therefore machining efficiency in the cutting of both of the planar surface and the curved surface can be improved.
Large diameter edges formed in arc shapes having curvature radii larger than a ball radius are provided. This allows improving surface roughness of a machined surface by cutting of a planar surface with the respective large diameter edges compared with cutting of a planar surface with a ball end cutting edge formed in an arc shape having a single curvature radius. Further, since the respective large diameter edges are formed in the arc shape, compared with cutting of a curved surface with linear cutting edges, surface roughness of a machined surface can be improved by cutting a curved surface with the respective large diameter edges. Accordingly, a pick feed during the cutting of the planar surface and the curved surface with the respective large diameter edges can be increased, and therefore machining efficiency in the cutting of both of the planar surface and the curved surface can be improved.
Provided is a gear chamfering method with which the axial-direction edge part of the tooth surface of each tooth of a gear can be chamfered in a short amount of time. This gear chamfering method comprises a chamfering step in which edge parts 15b, 15c of a plurality of teeth 12 of a gear 10 are chamfered by a chamfering tool 20 equipped with a machining blade 24. If a discretionary integer is represented as K, the number of teeth 12 is represented as Zw, and the number of machining blades 24 is represented as Zt, then in the chamfering step, the gear 10 is rotated by K・Zt/Zw around a rotation axis C1 every time the chamfering tool 20 is rotated once around a tool axis C2 in a machining posture in which the tool axis C2 is disposed non-parallel to the rotation axis C1. Due to this configuration, the machining blade 24 sequentially contacts the plurality of edge parts 15b, 15c, and the edge parts 15b, 15c are chamfered.
A hard coating includes first and second layers. The first layer is constituted by AlaCrbαcN, wherein atomic ratios a, b, c satisfy a+b+c=1, 0≤c≤0.40 and 0.25≤b/a≤1.0, and an optional additive component α is at least one kind of element selected from groups IVa, Va and VIa (except Cr) and Y of periodic table of elements. The second layer is constituted by AldCreCfN, wherein atomic ratios d, e, f satisfy d+e+f=1, 0.001≤f≤0.20 and 0.25≤ e/d≤1.0. A total thickness T of a thickness T1 of the first layer and a thickness T2 of the second layer is 0.5-9.0 μm. A ratio of the thickness T2 to the total thickness T is 5-50%. The hard coating has peaks belonging to (111) and (200) planes in an X-ray diffraction, such that an intensity ratio of a peak intensity SP1 of the (111) plane to a peak intensity SP2 of the (200) plane is 0.1-20.
A drill includes a drill main body to be rotated around a shaft center, discharge flutes provided in a helical shape in an outer peripheral surface, a cutting edge formed at a ridge section between an inner face, of the discharge flute, and a flank of the drill main body at a leading end portion, a thinning edge provided at the leading end portion of the drill main body, a thinning face being a rake face of the thinning edge, and connecting the thinning edge with the discharge flute, and a gash portion connected to the thinning face, a ridge line between the gash portion and the flank extending in a circular arc shape from an inner end of the thinning edge, and being connected to the discharge flute. The gash portion is connected to the discharge flute while twisting along a helix angle of the discharge flute.
A drill is provided with a flank at a leading end portion of a body. An oil hole is provided at the flank, having a fan-shaped cross-section. The fan-shaped cross-section is formed by being surrounded by a front-side inner wall surface, a rear-side inner wall surface, an outer peripheral-side inner wall surface, and an inner peripheral-side inner wall surface. Compared to a round hole, a discharge performance of cutting fluid of the oil hole is high. The rear-side inner wall surface curves in a circular arc shape toward the front in a rotation direction. Thus, the drill can secure a distance between a ridge section of the flank and the rear-side inner wall surface to be wide, can suppress stress acting on a section between the ridge section of the flank and the oil hole, and can thus increase a discharge amount of the cutting fluid and also secure a tool rigidity.
This cutting tool includes a base material which is a sintered object consisting mainly of tungsten carbide. The base material contains silicon carbide instead of cobalt. The outer surface of the base material has a diamond layer formed thereon which is made of polycrystalline diamond. Since the base material contains no cobalt, the base material neither inhibits synthesis of the diamond layer on the outer surface thereof nor reduces adhesion between the base material and the diamond layer. Thus, a high-hardness diamond layer tightly adhering to the outer surface of the base material can be formed and the cutting tool can hence have further improved durability.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
B23B 27/20 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier à éléments tranchants constitués par des diamants
This cutting tool comprises a base material which is a sintered body mainly composed of tungsten carbide. The base material does not contain a binder. A diamond layer is formed on the outer surface of the base material. Because the base material does not contain a binder, the formation of the diamond layer on the outer surface of the base material is not hindered, and the adhesion between the base material and the diamond layer is not reduced. Due to this configuration, the cutting tool is configured so that a high-hardness diamond layer can be formed in a highly adherent manner on the outer surface of the base material, and as a result thereof, durability can be further improved.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
B23B 27/20 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier à éléments tranchants constitués par des diamants
A drill (1) is provided with a thinning edge (7), a gash portion (8), a coolant passage, and an oil hole (12). The thinning edge (7) is provided at a leading end portion of a body (3), and extends toward a chisel portion (9) from an inner end (51) of a cutting edge (5). A ridge line between the gash portion (8) and the flank (6) extends in a circular arc shape from an inner end of the thinning edge (7) toward an outer peripheral surface (31) of the body (3). The coolant passage is provided inside a shank and the body (3), and extends from a rear end portion of the shank toward the leading end portion of the body (3). The oil hole (12) is provided at a gash face (81) of the gash portion (8) and is an outlet of the coolant passage.
This drilling tool comprises a core material and an outer material located around the core material, wherein, when viewed in a longitudinal direction from a tip end side, the outer material has formed therein an integral hole including an insertion region through which the core material is inserted, and an oil hole region communicating with the insertion region, and an oil hole is defined by an outer periphery of the core material inserted into the insertion region, and an edge of the oil hole region of the outer material.
An end mill that facilitates discharge of chips and enables twining of chips to be suppressed is provided. An end mill (10) includes a tool body, a helical flute, an end cutting edge, a flank, and a gash. The gash forms a cutting face of the end cutting edge. The cutting face is formed as a recessed curved surface and the end cutting edge comprised of a ridge between the cutting face and the flank is concavely curved.
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
Produits et services
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps; metalworking machines and tools, namely, drills; metalworking machines and tools, namely, drill bits; steel taps for use with high-speed tools for metalworking; steel drills being parts of high-speed tools for metalworking; steel drill bits being parts of high speed tools for metalworking; cemented carbide tools for metalworking; cemented carbide cutting tools; cemented carbide taps for metalworking; cemented carbide drill bits for metalworking; wear resistant tools for metalworking, namely, metalworking machine tools (1) Metalworking; treatment of materials for the manufacture of ceramic goods; coating and surface finishing of machines and tools.
Provided is a thread mill that can extend tool life-span by reducing the stripping of a female thread being processed. This thread mill (10) comprises: a plurality of threading edges (20a, 24, 29) which are disposed, apart from each other by an interval in a circumferential direction, on a leading end (14) side of the outer circumference of a tool body (12); and a plurality of end cutting edges formed at the leading end (14) of the tool body 12. Each of the end cutting edges has formed therein: a functional edge part (35) that is for cutting an object being processed; and a non-functional edge part (36) that is relieved toward a shank end (13) side in the axial direction with respect to a trajectory of the functional edge part (35) obtained when the tool body (12) is rotated one revolution about the shaft center (C) thereof.
A method of producing a nitrided cut tap that includes a nitrogen diffusion layer. The method includes (a) a nitriding step for forming the nitrogen diffusion layer in which nitrogen atoms contained in an atmospheric gas are diffused from a surface of a base material of the cut tap under heat, such that the nitrogen diffusion layer has a thickness ranging from 10 μm to 30 μm; and (b) a honing step for rounding a cutting edge portion by colliding abrasive particles against a local part of the cutting edge portion of the base material of the cut tap that has been subjected to the nitriding step, such that a difference between a thickness of the nitrogen diffusion layer in the cutting edge portion and a thickness of the nitrogen diffusion layer in flank and rake surfaces sandwiching the cutting edge portion, is not larger than 5 μm.
B23P 15/52 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe d'outils de filetage de tarauds
An end mill includes a plurality of peripheral cutting edges having a cutting diameter that is constant over their entire cutting length. The plurality of peripheral cutting edges, which are adjacent to each other, are defined by curved teeth. Each of the curved teeth is twisted in a twist direction that is changed irreversibly and smoothly from one of rightward and leftward directions to the other of the rightward and leftward directions in the entire cutting length so as to be reversed right and left on its way. Each of the curved teeth has a curved shape curved in an arcuate or arched manner in a development view of an outer circumferential surface of the end mill around an axis such that a corresponding one of the peripheral cutting edges is provided on a concave side of the curved shape.
An end mill includes a plurality of peripheral cutting edges that are defined by three types of teeth including a right-handed helical tooth that is twisted rightward, a left-handed helical tooth that is twisted leftward, and a curved tooth which is twisted in a direction reversed right and left on a way thereof and which has a curved shape curved in an arcuate or arched manner in a development view of an outer circumferential surface of the end mill around an axis such that a corresponding one of the peripheral cutting edges is provided on a concave side of the curved shape. Each adjacent pair of the peripheral cutting edges adjacent to each other are defined by the respective teeth that are different in type from each other.
A thread forming tap (1) comprises a male thread (3), a groove, and an inner-diameter finishing tooth (61). A lead-in section (31) of the male thread (3) is provided so as to be continuous with a complete thread section (32) and decreases in diameter toward the tip. The groove is provided parallel to the axis across the complete thread section (32) and the lead-in section (31) so as to divide the thread ridges (71) of the male thread (3). The inner-diameter finishing tooth (61) is provided along the open end of the groove on the opposite side from the direction of rotation of the thread forming tap (1) in the lead-in section (31) and the complete thread section (32). The inner-diameter finishing tooth (61) shaves and removes the top part of the thread ridges of a female thread formed in a surface layer of a pilot hole (90). The height of a first-stage finishing tooth (611) of the inner-diameter finishing tooth (61) in the lead-in section (31) is lower than the height of a second-stage finishing tooth (612) of the inner-diameter finishing tooth (61) formed in a part corresponding to the thread ridge (71) at the leading edge in the complete thread section (32).
Metalworking machine tools; machine tools for cutting and forming of metal materials; taps being machine tools; high-speed steel taps being machine tools; wear resistant tools for machine tools, namely, metalworking machine tools
An end mill includes a plurality of peripheral cutting edges have respective helix angles which are equal to each other and which range from 0° to 5°. Each of the plurality of peripheral cutting edges is defined by one of four types of teeth A-D consisting of (a) teeth A-C each defining a partially-uneven cutting edge that includes an uneven edge portion consisting of a nicked portion or a roughing portion and (b) a tooth D that does not define the uneven edge portion. The peripheral cutting edges are defined by at least two of the four types of teeth A-D, such that each adjacent pair of the peripheral cutting edges adjacent to each other are defined by the teeth that are different in type from each other.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps; steel taps being parts of high-speed tools for metalworking; wear resistant tools for metalworking.
NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Takikawa Hirofumi
Bando Takahiro
Saiki Yoshinori
Kito Jumpei
Hashimoto Yuki
Sugita Hiroaki
Gima Hiroki
Abrégé
[Problem] To provide a film-forming device in which an anode part provided with a function for generating a magnetic field is positioned between a cathode part and an object being processed, whereby it is possible to reduce adhesion of particles emitted from a cathode to a magnetic-field-generating part and to efficiently form a vapor-deposited film having few droplets, which are by-product fine particles emitted from the cathode. [Solution] A film-forming device that evaporates a cathode material constituting a cathode using a plasma-generating means for generating plasma by performing arc discharge to form a film by vapor deposition on the surface of an object being processed. The plasma-generating means is provided with a cathode part, an anode part disposed a suitable distance from the cathode part, a magnetic-field-generating part, and a protective member. The magnetic-field-generating part is configured from the anode part or is configured integrally or continuously with the anode part and generates a magnetic field using a current produced through arc discharge. The protective member is configured from a portion of the anode part or is configured independently while being electrically connected to the anode part and is positioned outside a region where the plasma flow descends to protect all or part of the magnetic-field-generating part from adhesion of cathode material.
Provided is a rolling die that increases the durability of a nitrided molded surface. The rolling die (1) includes a tool base material that is made of steel and has a molded surface (2) on which a plurality of working teeth (10) is formed. The tool base material includes a nitride layer (15) in which nitrogen is diffused. The nitride layer (15) is disposed to reach a position that is 20 to 70 μm in depth from the molded surface (2). The molded surface (2) has a surface hardness of at least 1100 HV. The rate of depth change from the depth (D1) of the nitride layer (15) at crests (11) of the working teeth (10) to the depth (D2) of the nitride layer (15) at roots (13) of the working teeth (10) is not higher than 30%.
Provided is a diamond-coated body comprising: a substrate that is formed from a material having a larger thermal expansion coefficient than diamond and that has a surface region extending in a first direction and a second direction which are mutually intersecting; a plurality of grooves in the surface region of the substrate, the grooves extending in the first direction and being spaced from each other in the second direction; and a coating layer that includes diamond as a constituting material and that covers the surface region of the substrate and the grooves; and a low density section which is formed on the bottom portion of each of the grooves and for which the density of diamond is lower than that of the coating layer.
This ball end mill comprises a ball blade part formed in a partially spherical shape, and when viewed from a rotational axis direction from the distal end, the ball blade part has at least one first groove in a first torsion form and a plurality of second grooves in a second torsion form, the first and second grooves extending from the distal end side of the ball blade part to the outer peripheral side. When, in one of the second grooves, an intersecting portion, located at a prescribed position from the distal end side, among intersecting portions intersecting the at least one first groove is defined as a first intersecting portion and, in another of the second grooves, an intersecting portion, located at the prescribed position from the distal end side, among the intersecting portions intersecting the at least one first groove is defined as a second intersecting portion, the length from the distal end to the first intersecting portion is different than the length from the distal end to the second intersecting portion.
Provided is a ball end mill comprising a ball blade formed in a partially spherical shape. The ball blade includes a plurality of grooves, including grooves having a first twisted shape and grooves having a second twisted shape different from the first twisted shape, such grooves extending from the leading end side of the ball blade towards the outer-circumferential side, when viewed in the rotational axis direction from the leading end. The plurality of grooves are non-connected at the leading end.
Metalworking machine tools; taps being machine tools; power drills; thread milling cutters being machine tools; turning point tools being machine tools; milling cutters for milling machines; reamers being machine tools; cemented carbide tools being machine tools; cemented carbide cutting tools; anti- abrasive cemented carbide cutting tools; cemented carbide tips; wear-resistant machine tools, namely, milling cutters; power tools, namely, end mills; power drill bits; power drill bits with a cooling hole
This end mill comprises a peripheral cutting edge along a helical flute, and a bottom cutting edge. The helical flute comprises a first flute (21) and a second flute (22). A flute bottom of the first flute (21) comprises a straight portion (41), a radiused portion (42), and an inclined portion (43). The straight portion (41) extends linearly in parallel with an axis O from the tip of the tool toward the rear end side to a position distanced by the length of an outer diameter of the tool. The inclined portion (43) is provided on the rear end side of the straight portion (41), and is linearly inclined radially outward from the straight portion (41) side toward the rear end side. The radiused portion (42) connects a rear end of the straight portion (41) and a front end of the inclined portion (43), and curves radially outward arcuately from the straight portion (41) side toward the inclined portion (43) side. The rake angles of the peripheral cutting edge and the bottom cutting edge are constant over the entire circumference.
A ballscrew thread forming tap including a complete thread portion and a leading portion is to be screwed into a prepared hole provided in a workpiece so as to cause an inner circumferential surface of the prepared hole to be plastically deformed for thereby forming a ballscrew thread corresponding to an external thread provided in the complete thread portion. A screw thread of the external thread has a leading flank and a trailing flank, which are to be positioned on a front side of the trailing flank and on a rear side of the leading flank, respectively, when the ballscrew thread forming tap is screwed into the prepared hole. The screw thread is formed such that, in the leading portion, an indentation depth into the workpiece made by the leading flank is smaller than an indentation depth into the workpiece made by the trailing flank.
This hard coating 32 comprises: a first layer 34 provided on the surface of a base material 30; and a second layer 36 provided on the surface of the first layer 34. The first layer 34 is composed of AlCrαN, and the second layer 36 is composed of AlCrCN. In addition, the overall film thickness T, which is the total of the film thickness T1 of the first layer 34 and the film thickness T2 of the second layer 36, falls within a range of 0.5-9.0 μm. The proportion (T2/T) of the film thickness T2 of the second layer 36 with respect to the overall film thickness T falls within a range of 5-50%. Furthermore, the hard coating exhibits X-ray diffraction peaks including peaks that are attributed to the (111) plane and (200) plane. The peak intensity ratio (SP1/SP2) of the peak intensity SP1 of the (111) plane to the peak intensity SP2 of the (200) plane falls within a range of 0.1-20. With the hard coating 32 thus configured, it is possible to achieve excellent durability.
C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
Provided is an end mill with which swarf can easily be discharged, and with which winding of swarf can be suppressed. An end mill (10) is provided with a columnar tool main body (11) which is rotated about an axis (O), serving as an axis of rotation, twisted flutes (12) which are recessed and which twist around the axis on an outer circumference of the tool main body, base cutting edges (16a to 16c) formed in a tip end portion of the tool main body, flanks (17a to 17c) extending in the circumferential direction from the base cutting edges, and gashes (18a to 18c) which are recessed on tip end sides of the twisted flutes, from an outer circumferential side toward the axis, and which form rake faces (19a to 19c) of the base cutting edges, wherein: the rake faces are formed as concave curved surfaces; and the base cutting edges, which comprise ridge lines between the rake faces and the flanks, have a concave curved shape.
A drill body of a drill (1) is to rotate around an axis. A plurality of discharge grooves (4) are spirally provided in an outer circumferential surface (31) of the drill body from a tip end part toward a base end part. Cutting edges (5) are formed at ridge portions between inner surfaces of the discharge grooves (4) that face the rotational direction side of the drill body and flank surfaces of the tip end part of the drill body. Thinning edges (7) extend at the tip end part of the drill body from inner ends of the cutting edges (5) toward a chisel (9) that is a tip end portion of the drill body. Thinning surfaces (71) that are rake surfaces of the thinning edges (7) connect the thinning edges (7) and the discharge grooves (4). Gash parts (8) are connected to the thinning surfaces (71), extend in an arc from inner ends of the thinning edges (7) at ridges with the flank surfaces, and are connected to the discharge grooves (4). The gash parts (8) are connected to the discharge grooves (4) so as to twist along the angle of twist of the discharge grooves (4).
A method for chamfering toothed gears which enables lengthening of a life of a tool is provided. The chamfering method is for sequentially chamfering the line intersection portions 23 between tooth flanks 21 and end faces 22 of teeth 2 with end cutting edges 122. A pitch Pb of the end cutting edges 122 is set to five times a pitch Pa of the teeth 2. As a result, at a chamfering step of chamfering line intersection portions 23 of the teeth 2, a circumferential speed of the end cutting edges 122 can be made faster than a circumferential speed of the teeth 2. Consequently, a difference in circumferential speed between the end cutting edges 122 and the teeth 2 can be utilized in chamfering and thus a cutting resistance can be reduced during the chamfering. Therefore, a life of the tool 100 can be lengthened.
A thread forming tap including a complete thread portion and a leading portion is to be screwed into a prepared hole provided in a workpiece so as to cause an inner circumferential surface of the prepared hole to be plastically deformed for thereby forming an internal thread corresponding to the external thread provided in the complete thread portion. A screw thread of the external thread has a leading flank and a trailing flank, which are to be positioned on a front side of the trailing flank and on a rear side of the leading flank, respectively, when the thread forming tap is screwed into the prepared hole. The screw thread is shaped such that, in the leading portion, an indentation depth into the workpiece made by the leading flank is smaller than an indentation depth into the workpiece made by the trailing flank.
A drill (1) is provided with a flank on a tip end portion of a body (3). The flank is provided with an oil hole (12). The oil hole (12) has a fan-shaped cross section. The fan-shaped cross section is formed by being surrounded by a leading-side inner wall surface (121), a trailing-side inner wall surface (122), an outer circumference-side inner wall surface (123), and an inner circumference-side inner wall surface (124). The oil hole (12) has better capacity of discharging cutting fluid than that of a circular hole. The trailing-side inner wall surface (122) is curved in an arc shape toward the leading side in a rotation direction (T). Thus, in the drill (1), the distance between a ridge portion of the flank and the trailing-side inner wall surface (122) can be ensured to be wide. The drill (1) can suppress stress acting on a portion between the ridge portion of the flank and the oil hole (12) and can thus increase the discharge amount of the cutting fluid while ensuring tool rigidity.
A drill (1) is provided with thinning edges (7), gash sections (8), coolant passages, and oil holes (12). The thinning edges (7) are provided at the distal-end part of a body (3), and extend from inner ends (51) of cutting edges (5) to chisel sections (9). In the gash sections (8), ridgelines formed with flanks (6) extend in an arc shape from the inner ends of the thinning edges (7) toward outer circumferential faces (31) of the body (3). The coolant passages are provided inside a shank and the body (3), and extend from the rear end part of the shank to the distal-end part of the body (3). The oil holes (12) are provided in gash faces (81) of the gash sections (8), and are outlets of the coolant passages.
A drill (1) is provided with a flank on a tip end portion of a body (3). The flank is provided with an oil hole (12). The oil hole (12) has a fan-shaped cross section. The fan-shaped cross section is formed by being surrounded by a leading-side inner wall surface (121), a trailing-side inner wall surface (122), an outer circumference-side inner wall surface (123), and an inner circumference-side inner wall surface (124). The oil hole (12) has better capacity of discharging cutting fluid than that of a circular hole. The trailing-side inner wall surface (122) is curved in an arc shape toward the leading side in a rotation direction (T). Thus, in the drill (1), the distance between a ridge portion of the flank and the trailing-side inner wall surface (122) can be ensured to be wide. The drill (1) can suppress stress acting on a portion between the ridge portion of the flank and the oil hole (12) and can thus increase the discharge amount of the cutting fluid while ensuring tool rigidity.
A drill (1) is provided with a body (10) and a head (30). The body (10) is formed of cemented carbide, and the head (30) is formed of PCD. Spiral coolant passages (17, 18) are provided inside the body (10). Oil holes (25, 26) are provided in a body-side joint surface of the body (10). The oil holes (25, 26) are outlets of the coolant passages (17, 18). Coolant passages (37, 38) provided inside the head (30) extend from oil holes (45, 46) provided at a tip (31) toward a rear end (32). A head-side joint surface of the head (30) is joined to the body-side joint surface. Two oil holes are provided in the head-side joint surface. The two oil holes are inlets of the coolant passages (37, 38), and communicate with the oil holes (25, 26) in the body-side joint surface.
Provided is a highly durable cut tap wherein blade chipping and wearing that occur during tapping have been suppressed. In this invention, in a nitriding step P2, under heating, nitrogen atoms contained in the atmosphere gas are diffused from the surface of a tool parent material for a cut tap, to form a nitrogen diffusion layer, and then, in a honing step P3, abrasive particles are collided against a cutting edge portion of the tool parent material for the cut tap, to round the cutting edge portion and eliminate a blade tip. In the cutting edge portion, due to the diffusion from a flank and the diffusion from a face, the nitrogen diffusion layer is formed to be thick, such that the blade tip of the cutting edge portion is of relatively high nitrogen concentration and hardness, and thus, is mechanically brittle. Therefore, eliminating the mechanically brittle blade tip reduces wearing and blade chipping in the cutting edge portion of the cut tap, yielding a tool performance whereby excellent cutting ability can be held over a long period of time.
B23P 15/52 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe d'outils de filetage de tarauds
A rotary cutting tool includes: a blade portion; a shank portion having a diameter larger than a diameter of the blade portion; and a tapered connecting portion connecting the blade portion and the shank portion. The shank portion includes a plurality of coolant-guide recessed grooves provided in its outer circumferential surface. Each of the coolant-guide recessed grooves has a groove depth and a groove width that is larger than the groove depth. Each of the coolant-guide recessed grooves has a groove bottom that is shaped such that the groove depth is reduced as the each of the coolant-guide recessed grooves extends from its start end toward a groove-depth regional-change position in which a tendency of change of the groove depth is changed.
Two or more outer circumferential cutting blades of this end mill are curved blades (circular arc blade A-C) in which respective torsion directions undergo a left-right reversal midway, which have a curved shape when viewed in an expansion plan expanded around a shaft center, and which are each provided with a cutting blade on the recess side of the curved shape. As a result, an anti-vibration effect is obtained through continuous changing of the direction of the cutting force due to change in the torsion angle. In addition, formation of burrs or the like on upper and lower surfaces of a workpiece is suppressed by the curved blades, and restrictions and the like on machining conditions is eased as a result of suppression of accumulation of cutting scraps since a smooth curved shape is formed.
In the present invention, at least one of a plurality of outer-peripheral cutting edges 20a-20c is a relief-pattern-edge-equipped cutting edge in which a relief pattern edge Er formed from a nicked edge or a roughed edge is provided, and the relief pattern edge Er is provided to only a portion of the edge length L of the relief-pattern-edge-equipped cutting edge; therefore, the magnitude of cutting force partially varies depending on the presence of the relief pattern edge Er. Specifically, because the portion where the relief pattern edge Er is provided has lower cutting force, resonance is suppressed due to this difference in cutting force, and chatter vibration occurring due to resonance is suppressed even in an equivalent-lead end mill 10 in which the helix angles of a plurality of outer-peripheral cutting edges 20a-20c are equivalent to each other.
This end mill comprises three types of cutting edge, a curved tooth BS, a left hand helical tooth BL, and a right hand helical tooth BR, as three peripheral cutting edges, adjacent peripheral cutting edges being constituted from different types of cutting edge. Therefore, the spacing between adjacent peripheral cutting edges is irregular and continuously changes in the axial direction, and the direction of cutting force varies. Consequently, resonance is suppressed, and an anti-vibration effect is adequately attained. Moreover, providing the curved tooth BS results in the more adequate suppression of the occurrence of burrs in comparison to when only the right hand helical tooth BR and the left hand helical tooth BL are present, and chatter vibration in the plate thickness direction of a workpiece is reduced as the cutting force acts inward on a curved shape. Furthermore, since the curved tooth BS has a smooth curved shape, the accumulation of chips is reduced, and restrictions on processing conditions are relaxed in comparison to a herringbone shape.
Large diameter edges formed in arc shapes having curvature radii larger than a ball radius are provided. This allows improving surface roughness of a machined surface by cutting of a planar surface with the respective large diameter edges compared with cutting of a planar surface with a ball end cutting edge formed in an arc shape having a single curvature radius. Further, since the respective large diameter edges are formed in the arc shape, compared with cutting of a curved surface with linear cutting edges, surface roughness of a machined surface can be improved by cutting a curved surface with the respective large diameter edges. Accordingly, a pick feed during the cutting of the planar surface and the curved surface with the respective large diameter edges can be increased, and therefore machining efficiency in the cutting of both of the planar surface and the curved surface can be improved.
A hard coating includes a three kinds of layers that are alternately laminated. The three kinds of layers consist of a single composition layer and two kinds of nanolayer-alternated layers. The single composition layer is constituted by one of an A composition (nitride of AlCrSiα), a B composition (nitride of CrBSiβ) and a C composition (nitride of AlCr(SiC)γ). The two kinds of nanolayer-alternated layers include nanolayers which are alternately laminated and which are constituted by two of three combinations consisting of a combination of the A composition and B composition, a combination of the A composition and C composition and a combination of the B composition and C composition. The single composition layer has a thickness of 0.5-1000 nm. Each of the nanolayers constituting the two kinds of nanolayer-alternated layers has a thickness of 0.5-500 nm, and each of the two kinds of nanolayer-alternated layers has a thickness of 1-1000 nm.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
C23C 14/32 - Évaporation sous vide par explosionÉvaporation sous vide par évaporation suivie d'une ionisation des vapeurs
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
Provided is a method for chamfering gears that is capable of improving the lifespan of a tool. This method is a chamfering method for progressively chamfering, with bottom blades (122), an intersection part (23) between a tooth surface (21) and an end surface (22) of a tooth (2), wherein the pitch (Pb) of the plurality of bottom blades (122) is set to five times the pitch (pa) of the plurality of teeth (2). Accordingly, in a chamfering step for chamfering the intersection part (23) of the tooth (2), it is possible to make the circumferential speed of the bottom blades (122) higher than the circumferential speed of the teeth (2). Therefore, since chamfering can be performed using the difference in the circumferential speed between the bottom blades (122) and the teeth (2), cutting resistance can be reduced during chamfering. Thus, the lifespan of a tool (100) can be improved.
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japon)
KYUSHU INSTITUTE OF TECHNOLOGY (Japon)
OSG CORPORATION (Japon)
Inventeur(s)
Ikenoue, Hiroshi
Yoshitake, Tsuyoshi
Katamune, Yuki
Murasawa, Koki
Abrégé
A diamond smoothing method of irradiating a laser light onto a raised and recessed surface of a diamond, so as to smooth the raised and recessed surface, by ablation that is caused to occur in the diamond by irradiation of the laser light onto the raised and recessed surface. The method includes: a threshold-energy-density detecting step of irradiating the laser light onto the raised and recessed surface, and changing an irradiation energy density of the laser light, so as to detect a threshold energy density as a lower threshold value of the irradiation energy density that causes the ablation to occur; and a smoothing processing step of executing a smoothing processing by irradiating the laser light onto the raised and recessed surface with a smoothing irradiation energy density that is set to be within a range from 1 to 15 times as large as the threshold energy density.
C30B 33/00 - Post-traitement des monocristaux ou des matériaux polycristallins homogènes de structure déterminée
C30B 33/04 - Post-traitement des monocristaux ou des matériaux polycristallins homogènes de structure déterminée en utilisant des champs électriques ou magnétiques ou des rayonnements corpusculaires
B23K 103/00 - Matières à braser, souder ou découper
Provided is a rolling die with a nitrided molding face having increased durability. A rolling die (1) has a molding face (2) on which a plurality of processing teeth (10) are formed, and is made of a steel tool base material. The rolling die (1) has a nitride layer (15) in which nitrogen is dispersed in the tool base material and which is provided to a position of 20-70 µm in depth from the molding face (20). The surface hardness of the molding face (2) is at least 1100 HV. The ratio of change of a depth (D2) of the nitride layer (15) at a valley bottom (13) of the processing teeth (10) to a depth (D1) of the nitride layer (15) at a peak (11) of the processing teeth (10) is no greater than 30%.
C23C 8/26 - Nitruration de la couche superficielle de matériaux ferreux
B21H 3/06 - Fabrication au moyen d'éléments profilés autres que des rouleaux, p. ex. au moyen de mâchoires se déplaçant longitudinalement ou décrivant des courbes l'une par rapport à l'autre
A hard coating includes three kinds of alternately laminated layers. The three kinds of layers consist of two kinds of single composition layers and a nanolayer-alternated layer. The two kinds of single composition layers are constituted by respective two of an A composition, a B composition and a C composition, wherein the A composition is a nitride of AlCrα, the B composition is a nitride of AlCrSiβ, and the C composition is a nitride of AlCr(SiC)γ. The nanolayer-alternated layer includes two kinds of nanolayers which are constituted by respective two of the A composition, the B composition and the C composition and which are alternately laminated. Each of the two kinds of single composition layers has a thickness of 0.5-1000 nm. Each of the two kinds of nanolayers has a thickness of 0.5-500 nm, and the nanolayer-alternated layer has a thickness of 1-1000 nm.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
C23C 14/32 - Évaporation sous vide par explosionÉvaporation sous vide par évaporation suivie d'une ionisation des vapeurs
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
A tapered end mill includes an outer circumferential cutting edge, a flute is disposed such that a flute bottom radius defined as a distance between a flute bottom and the tool axis decreases from a shank side toward the tool tip side, the flute bottom radius linearly changes at a predetermined gradient angle in the tool axis direction, the gradient angle changes at a predetermined change point to become smaller on the tool tip side as compared to the shank side, and a gradient angle θ1 on the tool tip side relative to the change point is equal to or larger than 0° and smaller than a taper half angle α of a cutting portion provided with the outer circumferential cutting edge, and a gradient angle θ2 on the shank side relative to the change point is larger than the taper half angle α.
A three-flute drill includes a body, discharge grooves, cutting edges, thinning edges and gash portions. The discharge grooves are provided in an outer peripheral surface of the body. The cutting edges are provided on ridge sections between inner faces of the discharge grooves and flanks of the body. The thinning edge extends from an end of the cutting edge toward a radially inner side. The gash portion includes an R portion and a straight portion. A first ridge line between the R portion and the flank extends while curving toward a rotation direction, from an end of the thinning edge toward a radially outer side. A second ridge line between the straight portion and the flank extends linearly from an end of the first ridge line toward the radially outer side, and connects to the discharge groove further to the radially inner side than the outer peripheral surface.
A step drill and a manufacturing method for a step drill in which cutting performance of a cutting edge of a step portion can be enhanced are provided. A groove includes a first ground portion forming an area embracing a second cutting edge of the step portion and a second ground portion forming an area on the heel side of the step portion relative to the first ground portion. Therefore, a convex blade part can be formed on a first cutting edge by performing grinding with the first ground portion and the second ground portion intersecting with each other. That is, it is possible to form the second cutting edge into a desired shape during grinding of the first ground portion. Therefore, cutting performance of the second cutting edge can be enhanced.
A thread forming tap 10 for a ball screw, the thread forming tap 10 being formed so that: a thread crest 18 of a biting part is provided with an advancing-side flank surface 18a that serves as a front leading side when screwed into a pilot hole, and a trailing-side flank surface 18b that serves as a rear side in the same situation; and in the biting part, the indentation depth Da of the leading-side flank surface 18a of the thread crest 18 with respect to an article 40 being processed is less than the indentation depth Db of the trailing-side flank surface 18b of the thread crest 18 with respect to the article 40 being processed. Due to this configuration, a counterforce Fa from the article 40 being processed that is applied to the leading-side flank surface 18a in order to plastically deform the article 40 being processed is less than a counterforce Fb from the article 40 being processed that is applied to the trailing-side flank surface 18b during a tapping process. Therefore, pressure and friction with respect to the leading-side flank surface 18a are suppressed during the tapping process, and a highly precise ball screw is obtained.
The present invention suppresses a reduction in durability and tool longevity by suppressing pressure on an advancing-side flank face during tapping machining. Provided is a thread forming tap wherein a screw thread 18 on a chamfer comprises an advancing-side flank face 18a, which is the advancing side thereof when screwed into a pilot hole in a workpiece 40, and a following-side flank face 18b, which is the back side, and on the chamfer, the indentation depth Da into the workpiece 40 made by the advancing-side flank face 18a of the screw thread 18 is formed so as to be smaller than the indentation depth Db made by the following-side flank face 18b of the screw thread 18. Therefore, during tapping machining, reaction force Fa from the workpiece 40 applied to the advancing-side flank face 18a to plastically deform the workpiece 40 is reduced more than the reaction force Fb from the workpiece 40 applied to the following-side flank face 18b, and thus the reaction force Fb on the advancing-side flank face 18a is suppressed and a reduction in the durability and tool longevity of a thread forming tap 10 is suppressed.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps and turning point tools; drill bits for metal working machines; thread milling cutters being machine tools; milling cutters being machine tools; reamers being machine tools; end mills; cemented carbide tools for metalworking; cemented carbide cutting tools; anti-abrasive cemented carbide tools for metalworking; cemented carbide tips for metalworking; diamond tools for metalworking; diamond-pointed metal cutting tools for metalworking; wear-resistant diamond-pointed metal-cutting tools for metalworking; rolling dies being machine tools.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps and turning point tools; drill bits for metal working machines; thread milling cutters being machine tools; milling cutters being machine tools; reamers being machine tools; end mills; cemented carbide tools for metalworking; cemented carbide cutting tools; anti-abrasive cemented carbide tools for metalworking; cemented carbide tips for metalworking; diamond tools for metalworking; diamond-pointed metal cutting tools for metalworking; wear-resistant diamond-pointed metal-cutting tools for metalworking; rolling dies being machine tools.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps and turning point tools; drill bits for metal working machines; thread milling cutters being machine tools; milling cutters being machine tools; reamers being machine tools; end mills; cemented carbide tools for metalworking; cemented carbide cutting tools; anti-abrasive cemented carbide tools for metalworking; cemented carbide tips for metalworking; diamond tools for metalworking; diamond-pointed metal cutting tools for metalworking; wear-resistant diamond-pointed metal-cutting tools for metalworking; rolling dies being machine tools.
Metalworking machine tools; machine tools for cutting and forming of metal materials; taps being machine tools; power drill bits for metalworking; thread milling cutters being machine tools; turning point tools for machine tools being power operated metalworking machine tools in the nature of turning tools; milling cutters for milling machines; power tools, namely, reamers; power tools, namely, end mills for machine tools; cemented carbide cutting tools for machine tools; anti-abrasive cemented carbide cutting tools; cemented carbide tips; diamond-pointed metal cutting tools; wear-resistant diamond-pointed metal-cutting tools for machine tools; rolling dies for use with machine tools
Metalworking machine tools; machine tools for cutting and forming of metal materials; taps being machine tools; power drill bits for metalworking; thread milling cutters being machine tools; turning point tools for machine tools being power operated metalworking machine tools in the nature of turning tools; milling cutters for milling machines; power tools, namely, reamers; power tools, namely, end mills for machine tools; cemented carbide cutting tools for machine tools; anti-abrasive cemented carbide cutting tools; cemented carbide tips; diamond-pointed metal cutting tools; wear-resistant diamond-pointed metal-cutting tools for machine tools; rolling dies for use with machine tools
Metalworking machine tools; machine tools for cutting and forming of metal materials; taps being machine tools; power drill bits for metalworking; thread milling cutters being machine tools; turning point tools for machine tools being power operated metalworking machine tools in the nature of turning tools; milling cutters for milling machines; power tools, namely, reamers; power tools, namely, end mills for machine tools; cemented carbide cutting tools for machine tools; anti-abrasive cemented carbide cutting tools; cemented carbide tips; diamond-pointed metal cutting tools; wear-resistant diamond-pointed metal-cutting tools for machine tools; rolling dies for use with machine tools
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps and turning point tools; drill bits for metal working machines; thread milling cutters being machine tools; milling cutters being machine tools; reamers being machine tools; end mills; cemented carbide tools for metalworking; cemented carbide cutting tools; anti-abrasive cemented carbide tools for metalworking; cemented carbide tips for metalworking; diamond tools for metalworking; diamond-pointed metal cutting tools for metalworking; wear-resistant diamond-pointed metal-cutting tools for metalworking; rolling dies being machine tools.
(1) Metalworking machines tools; cutting tools for metalworking, namely machine cutting tools for metalworking; metalworking machines and tools, namely, taps and turning point tools; drill bits for metal working machines; thread milling cutters being machine tools; milling cutters being machine tools; reamers being machine tools; end mills; cemented carbide tools for metalworking; cemented carbide cutting tools; anti-abrasive cemented carbide tools for metalworking; cemented carbide tips for metalworking; diamond tools for metalworking; diamond-pointed metal cutting tools for metalworking; wear-resistant diamond-pointed metal-cutting tools for metalworking; rolling dies being machine tools.
An insert is provided, ensuring to vary the cutout angle of the cutting edge without replacing the body, and to prevent the change in the cutout angle of the cutting edge in the cutting process. The insert includes a constraining part, a through hole, and a blade. The blade includes a cutting edge for the cutting process. An outer surface of the constraining part around the central axis includes a pair of first constraining surfaces, and a pair of second constraining surfaces. The cutting edge in the state where the pair of first constraining surfaces are fixed becomes non-parallel to the cutting edge in the state where the constraining part is rotated around the central axis from the fixed state of the pair of first constraining surfaces to place the pair of second constraining surfaces on the same surface on which the pair of first constraining surfaces have been fixed.
A hard coating includes a three kinds of layers that are alternately laminated. The three kinds of layers consist of a single composition layer and two kinds of nanolayer-alternated layers. The single composition layer is constituted by one of an A composition (nitride of AlCrα), a B composition (nitride of AlTiCrβ) and a C composition (nitride of AlCr(SiC)γ). The two kinds of nanolayer-alternated layers include nanolayers which are alternately laminated and which are constituted by two of three combinations consisting of a combination of the A composition and B composition, a combination of the A composition and C composition and a combination of the B composition and C composition. The single composition layer has a thickness of 0.5-1000 nm. Each of the nanolayers constituting the two kinds of nanolayer-alternated layers has a thickness of 0.5-500 nm, and each of the two kinds of nanolayer-alternated layers has a thickness of 1-1000 nm.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
C23C 14/32 - Évaporation sous vide par explosionÉvaporation sous vide par évaporation suivie d'une ionisation des vapeurs
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
A hard coating includes a three kinds of layers that are alternately laminated. The three kinds of layers consist of a single composition layer and two kinds of nanolayer-alternated layers. The single composition layer is constituted by one of an A composition (nitride of AlCrSiα), a B composition (nitride of AlTiSiβ) and a C composition (nitride of AlCr(SiC)γ). The two kinds of nanolayer-alternated layers include nanolayers which are alternately laminated and which are constituted by two of three combinations consisting of a combination of the A composition and B composition, a combination of the A composition and C composition and a combination of the B composition and C composition. The single composition layer has a thickness of 0.5-1000 nm. Each of the nanolayers constituting the two kinds of nanolayer-alternated layers has a thickness of 0.5-500 nm, and each of the two kinds of nanolayer-alternated layers has a thickness of 1-1000 nm.
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
C23C 14/32 - Évaporation sous vide par explosionÉvaporation sous vide par évaporation suivie d'une ionisation des vapeurs
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
This three-fluted drill (1) comprises a body (3), discharge grooves (4), cutting flutes (5), thinning flutes (7), and gash sections (8). The body (3) extends centered on an axis (AX). The discharge grooves (4) are provided on an outer circumferential surface (31) of the body (3). The cutting flutes (5) are each provided on a ridgeline portion of the inner surface (41) of each discharge groove (4) and each relief surface (6) of the body (3). The thinning flutes (7) extend radially inward from an edge (51) of each of the cutting flutes (5). The gash sections (8) each have an R section (81) and a straight section (82). First ridgelines (811) of the R sections (81) and the relief surfaces (6) are each curved and extend radially outward from an edge (71) of each thinning flute (7) in a rotation direction (R). Second ridgelines (821) of the straight sections (82) and the relief surfaces (6) each linearly extend radially outward from an edge (812) of each first ridgeline (811), and each connect to the discharge grooves (4) further radially inward than the outer circumferential surface (31).
A thread forming tap including a complete thread portion and a leading portion that are provided with an external thread. A thread ridge of the external thread has, in an axial cross section, a triangular shape that is defined by a pair of flanks located on respective opposite sides in an axial direction, such that each of the flanks is inclined by a predetermined flank angle corresponding to a shape of a valley of an internal thread to be formed. A sharp crest is provided in a top portion of the thread ridge at least in the leading portion, and has, in the axial cross section, a triangular shape that is defined by a pair of side surfaces located on respective opposite sides in the axial direction, such that each of the side surfaces is inclined by an inclination angle that is larger than the flank angle.
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japon)
Inventeur(s)
Murasawa Koki
Yoshitake Tsuyoshi
Ali Mohamed Ali Ebrahim Abdelgawad
Abrégé
A tool coated with a composite hard carbon coating film, which can have high hardness even when formed in a large thickness; and a method for producing a composite hard carbon coating film. In a composite hard carbon coating film 24, a first hard carbon layer 26 located on the side of a tool base material 22 has a thickness t1 of 0.2 to 3.0 μm and a density d1 of 2.1 g/cm3to 2.4 g/cm3, a second hard carbon layer 28 adhered on the first hard carbon layer 26 has a thickness t2 of 1.0 to 9.0 μm and a density d2 of 2.5 g/cm3to 3.0 g/cm3. Because the density of the first hard carbon layer 26 located on the side of the tool base material 22 is relatively smaller than the density of the second hard carbon layer 28 arranged on the first hard carbon layer 26, the first hard carbon layer 26 having a relatively smaller density can act as a cushioning layer even when the overall hardness and the overall thickness of the coating film are increased. As a result, the detachment of the coating film can be prevented and high wear resistance can be achieved as a whole.
C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
B23B 5/16 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour biseauter, chanfreiner, ou ébavurer les extrémités de barres ou de tubes
B23B 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
