A ball-end mill includes arcuate cutting edges each extending from a tip end to a peripherally outermost point along a S shape curve when viewed from the front side, spirally-shaped, peripheral cutting edges each smoothly connected to each arcuate cutting edge, and a convex rake face of each arcuate cutting edge protruding forward in a rotation direction. Each arcuate cutting edge has a radial rake angle satisfying β<α≦γ, where α is a radial rake angle at a radial angle of 5°, β is a radial rake angle at a radial angle of 90°, and γ is a radial rake angle at a rotationally most projecting point of the arcuate cutting edge. The radial rake angle has the maximum value at a radial angle in a range of 12-40° and continuously decreases in a range from the rotationally most projecting point to the peripherally outermost point.
A hard-coated tool comprising a titanium carbonitride layer formed directly on a WC-based cemented carbide substrate by a chemical vapor deposition method; the titanium carbonitride layer having a composition comprising 74-81% by mass of titanium, 13-16% by mass of carbon and 6-10% by mass of nitrogen; the titanium carbonitride layer having a structure comprising columnar crystal grains having an average transverse cross section diameter of 0.01-0.22 μm; a layer of W diffused from the substrate to the titanium carbonitride layer having an average thickness of 30-200 nm; and the titanium carbonitride layer having an X-ray diffraction peak of a (422) plane in a 2θ range of 122.7-123.7°.
C23C 30/00 - Revêtement avec des matériaux métalliques, caractérisé uniquement par la composition du matériau métallique, c.-à-d. non caractérisé par le procédé de revêtement
C23C 16/44 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c.-à-d. procédés de dépôt chimique en phase vapeur [CVD] caractérisé par le procédé de revêtement
The present invention provides a coated cutting tool that has: a substrate; an intermediate coating film comprising a carbide containing tungsten (W) and titanium (Ti) and having a film thickness of 1-10 nm; and a hard coating film comprising an AlTi-based nitride or carbonitride having a crystal structure that is a face-centered cubic lattice structure, and having an Al content (atom%) of at least 60% and a Ti content (atom%) of at least 20%. Of the hard coating film, in a strength profile according to a selected area diffraction pattern in a transmission electron microscope, when the peak strength caused by the AlN (010) plane of a hexagonal closest packing structure is Ih, and the total of the peak strength caused by the AlN (111) plane, the TiN (111) plane, the AlN (002) plane, the TiN (002) plane, the AlN (022) plane and the TiN (022) plane in the face-centered cubic lattice structure and the peak strength caused by the AlN (010) plane, the AlN (011) plane, and the AlN (110) plane in the hexagonal closest packing structure is Is, Ih×100/Is ≤ 20.
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
The present invention provides a coated cutting tool in which the surface of a base material is coated with a hard coating. The hard coating comprises: an (a) layer, which is disposed on the surface of the base material and is obtained from a carbide containing W and Ti; and a (b) layer, which is disposed on the (a) layer and is obtained from an AlCrSi nitride or carbonitride for which, of the metal elements (including metalloids), the content (atom %) of Al is highest and the content (atom %) of Si is 5% - 20%. The (b) layer is a NaCl-type crystal structure.
B23C 5/16 - Outils de fraisage caractérisés par des particularités physiques autres que la forme
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
5.
Surface-modified, WC-based cemented carbide member, hard-coated, WC-based cemented carbide member, and their production methods
The ion bombardment of Cr, etc. onto a surface of a WC-based cemented carbide substrate in a nitrogen-based gas forms a modified phase having a bcc structure on the substrate surface, and a hard coating containing at least Cr formed thereon has high adhesion to the substrate by the modified phase.
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 27/14 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier
A negative cutting insert having a cutting edge comprising four long-side cutting edge portions for rough cutting and four short-side cutting edge portions for finish cutting, which are connected alternately, thereby being able to conduct rough cutting when attached to a rough-cutting tool body, and finish cutting when attached to a finish-cutting tool body. When such cutting inserts are used for rough or finish cutting and then reattached to a finish-cutting tool body or a rough-cutting tool body, finish or rough cutting can be conducted, thereby using all cutting edges thoroughly.
B23C 5/20 - Outils de fraisage caractérisés par des particularités physiques autres que la forme à taillants ou dents amovibles
B23B 27/16 - Outils de coupe sur lesquels les taillants ou éléments tranchants sont en matériaux particulier à éléments tranchants interchangeables, p. ex. pouvant être fixés par des brides
B23C 5/06 - Fraises à surface, c.-à-d. fraises n'ayant qu'une surface de coupe pratiquement plate, ou principalement une telle surface
A ball end mill having, on the front end of the main body of the end mill: arc-shaped cutting edges extending from the tip to the outermost circumferential points, curving in a S-shape in front view; outer circumferential cutting edges with a spiral shape that connect smoothly to the arc-shaped cutting edges; and convex curved cutting faces on the front sides of the arc-shaped cutting edges in the rotation direction. Radial direction rake angles of the arc-shaped cutting edges satisfy the condition that (β) < (α) ≤ (γ) (provided (α) is the radial direction rake angle when the radial angle is 5°, (β) is the radial direction rake angle when the radial angle is 90°, and (γ) is the radial direction rake angle at the point of the arc-shaped cutting edges that protrudes furthest in the rotation direction). The maximum values for the radial direction rake angle of the arc-shaped cutting edges are for radial angles in the range of 12-40°, and the radial direction rake angle decreases continuously from the points that protrude furthest in the rotation direction to the outermost circumferential points.
Provided is a hard film coating tool obtained by having a titanium carbonitride layer formed by direct chemical vapor deposition on a substrate comprising a WC group hard metal alloy, wherein: the titanium carbonitride layer contains 74 to 81% by mass of titanium, 13 to 16% by mass of carbon, and 6 to 10% by mass of nitrogen; the titanium carbonitride layer has a structure comprising columnar crystal grains having a mean transverse cross-sectional diameter of 0.01 to 0.22 μm; the mean thickness of a layer in which W diffuses from the substrate into the titanium carbonitride layer is 30 to 200 nm; and the X-ray diffraction peak position 2θ for the (422) plane of the titanium carbonitride layer is 122.7° to 123.7°.
The present invention provides a method for cutting a cold work tool steel containing 0.6 to 1.2% by mass of C and having hardness of 60 HRC or more, said method comprising cutting the cold work tool steel using a coated cutting tool that is coated with a coating film comprising a nitride of AlTi, wherein a metal part (including a semi-metal part) of the coating film contains Al at an atom ratio of more than 50%.
B23B 1/00 - Méthodes de tournage ou méthodes de travail impliquant l'utilisation de toursUtilisation d'équipements auxiliaires en relation avec ces méthodes
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
[Problem] To enhance the effect of discharging chips from gashes (7) and the effect of guiding the chips to blade grooves (8) when high-speed, high-feed cutting is performed on a thin member such as an impeller made from a difficult-to-machine alloy using a multi-edge end mill having gashes and blade grooves. [Solution] The rake face of a cutting edge (3) comprises: a rake face (6a) of an end cutting edge (6) disposed from the side at the rotation axis (O) to the radially outer circumferential side; and a rake face (4a) of an outer peripheral edge (4) which also functions as the rake face of a corner R edge (5), the rake face (4a) being formed adjacent to the rake face (6a) as a face that is different from the rake face (6a) of the end cutting edge (6). The point of intersection between a convex ridge line (64), which is located at the boundary between the rake face (6a) of the end cutting edge (6) and the rake face (4a) of the outer peripheral edge (4), and a convex ridge line (68), which is located at the boundary between the rake face (6a) of the end cutting edge (6) and the bottom surface (8b) of a blade groove (8), is arranged further toward the rotation axis (O) in the radial direction than the boundary between the flank face (5b) of the corner R edge (5) and the flank face (6b) of the end cutting edge (6).
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
C23C 30/00 - Revêtement avec des matériaux métalliques, caractérisé uniquement par la composition du matériau métallique, c.-à-d. non caractérisé par le procédé de revêtement
B05D 5/00 - Procédés pour appliquer des liquides ou d'autres matériaux fluides aux surfaces pour obtenir des effets, finis ou des structures de surface particuliers
C23C 16/455 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c.-à-d. procédés de dépôt chimique en phase vapeur [CVD] caractérisé par le procédé de revêtement caractérisé par le procédé utilisé pour introduire des gaz dans la chambre de réaction ou pour modifier les écoulements de gaz dans la chambre de réaction
The present invention relates to an end mill, which comprises a bottom edge, which is composed of an arc-shaped cutting edge that is curved when seen from a direction perpendicular to the tool axis and a linear or curved medium-to-low inclination cutting edge, and a peripheral edge, wherein, when seen from a direction parallel to the tool axis, the arc-shaped cutting edge and a rim at the rearward side of the rotation at a flank of the arc-shaped cutting edge are curved with radii of curvatures, and the radius of curvature of the arc-shaped cutting edge is smaller than the radius of curvature of the rim at the rearward side of the rotation at the flank of the arc-shaped cutting edge.
Provided are: an exchangeable tip cutting tool in which breakage of the threaded section and breakage of the thread ridges during installation of the machining head and under increased cutting load during cutting are limited and which is capable of performing machining with high efficiency; and a machining head and a holder to be used in the exchangeable tip cutting tool. The exchangeable tip cutting tool is configured from: a machining head (1, 1a) having a male threaded fastening section (6) wherein the flank angle (α) of the pressure flank (11) is set to be larger than the flank angle (β) of the clearance flank (12); and a holder (2, 2a) having a female threaded fastening section (8) wherein the angle of the screwing surface of the pressure flank is set to be larger than the angle of the screwing surface of the clearance flank.
A multiple-edged ball end mill which is equipped with a shank part, a cutting edge part having a ball part, and at least three cutting edges each having a ball edge. Therein: concave inclined edges integrally extend from the tips of each ball edge in the vicinity of the rotational centre of the tip of the ball part as far as the rotational centre; each concave inclined edge has an arch-shaped section which is at least curved rearward to the rotational direction; each concave inclined part is inclined at an inclination angle (α) of 0.5-3° relative to the plane perpendicular to the rotational axis, such that the rotational centre is located rearward in the rotational axis direction; the proportion, in the radial direction, of the length of arch-shaped section in each of the concave inclined parts is 20-100%; in each of the cutting edges, the width, in the circumferential direction, of the flank surface at the connection point between the concave inclined edge and the ball edge is 20-80% of the maximum width, in the circumferential direction, of the ball edge; and the length (X), in the radial direction, of each of the concave inclined edges is 1.25-3.75% of the cutting diameter (D) of the cutting edge part.
In order to provide a covering member for which unexpected sticking is suppressed in the initial stages when the member is used, and which has excellent sliding properties, a covering member has a hard film on the working surface and has excellent sliding properties, said hard film including an A layer, for which an a1 layer comprising a nitride, carbonitride, or oxynitride having 30% or more of chrome in the metal (including metalloid; the same hereinafter) component in terms of atomic ratio, and an a2 layer comprising a nitride, carbonitride, or oxynitride having 60% or more of vanadium in the metal component in terms of atomic ratio, are alternately laminated, and a B layer on the upper layer of said A layer and comprising a nitride, carbonitride, or oxynitride having 60% or more of vanadium in the metal component in terms of atomic ratio. The film thickness of each a1 layer and a2 layer of the A layer is 50 nm or less, with the film thickness of the a2 layer being greater than that of the a1 layer, and the film thickness of the B layer is 0.1 μm or greater.
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
16.
SURFACE-MODIFIED WC-BASED CEMENTED CARBIDE MEMBER, HARD FILM-COATED WC-BASED CEMENTED CARBIDE MEMBER, METHOD FOR PRODUCING SURFACE-MODIFIED WC-BASED CEMENTED CARBIDE MEMBER, AND METHOD FOR PRODUCING HARD FILM-COATED WC-BASED CEMENTED CARBIDE MEMBER
A modification phase having a bcc structure is formed on the surface of a WC-based cemented carbide base by subjecting the base surface to an ion bombardment treatment of Cr or the like in a gas that is mainly composed of nitrogen, and a hard film containing at least Cr is formed on the modification phase. Consequently, the base and the hard film have high adhesion to each other due to the modification phase.
B23C 5/16 - Outils de fraisage caractérisés par des particularités physiques autres que la forme
B23P 15/28 - 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
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
17.
NEGATIVE-TYPE CUTTING INSERT, BLADE-INTERCHANGEABLE ROTARY CUTTING TOOL USING SAME CUTTING INSERT, BLADE-INTERCHANGEABLE ROTARY CUTTING TOOL SYSTEM, AND CUTTING METHOD
Provided is a negative-type cutting insert with a cutting edge including four coarse-processing long-side cutting edge portions and four fine-processing short-side cutting edge portions alternately linked together. The cutting insert can be used for coarse processing when attached to a coarse processing tool body or for fine processing when attached to a fine processing tool body. The cutting insert may be re-attached to the fine processing tool body or the coarse processing tool body after coarse processing or fine processing and then used for fine processing or coarse processing. Thus, the entire periphery of the cutting edge can be fully utilized.
[Problem] To improve removal of chips generated when performing high feed processing of thin-walled materials such as impellers using a multi-flute endmill. [Solution] In a multi-flute endmill (1) having a cutting edge part (3) provided with multiple cutting edges and flutes (8) formed between cutting edges that are adjacent in the direction of rotation around the tool axis (O), the rake face of the cutting edge is configured from: the rake face (6a) of an end cutting edge (6) from the tool axis (O) to the outer circumference of the shank (2); the adjacent rake face (5a) of a corner R edge (5) that forms a surface different from the rake face (6a) of the end cutting edge (6); and the adjacent rake face (4a) of a peripheral cutting edge (4) that forms a surface different from the rake face (5a) of the corner R edge (5). Between the rake face (6a) of an end cutting edge (6) and the flank (6b) of the end cutting edge (6) that is adjacent on the forward side thereof in the direction of rotation (R), a gash (7), which configures a space that is continuous with the flute (8), is formed, and one surface that configures the gash (7) also serves as the rake face (6a) of the end cutting edge (6).
[Problem] To prevent turning of a circular insert during cutting work without losing blade edge strength or the like of the insert in a cutting tool with a replaceable blade edge in which the insert is detachably mounted. [Solution] In the external peripheral surface of a circular insert, the thickness of the circular insert which has at least one turn-preventing surface is h1, the height from the bottom surface to the top end of the turn-preventing surface is h2, the height from the bottom surface to the bottom end of the turn-preventing surface is h3, h2 satisfies formula (1) below, and h3 satisfies formula (2) below. An insert-fixing part of a tool assembly comprises: a seat surface on which the bottom surface of the insert sits; two arcuate bearing surfaces for restraining the external peripheral surface of the insert, the bearing surfaces standing upright from the ends of the seat surface; and a turn-preventing part for contacting the turn-preventing surface of the insert, the turn-preventing part standing upright from the seat surface in between the two bearing surfaces. Formula (1): (1/2)h1 ≤ h2 ≤ (2/3)h1; Formula (2): (1/10)h1 ≤ h3 ≤ (1/3)h1
A hard-film-coated member which comprises a base constituted of a superhard alloy or a high-speed steel and a titanium carbonitride layer formed on the base by chemical vapor deposition, the titanium carbonitride layer having a columnar crystal structure and comprising first to third layers in this order from the base side (the carbon concentration of the second layer is lower than the carbon concentration of the first layer, and the carbon concentration of the third layer is lower than the carbon concentration of the second layer); and a bit-exchangeable rotary tool which includes the member. The first layer is formed using feed gases which comprise TiCl4 gas, N2 gas, a C2-5 hydrocarbon gas, and H2 gas. The second layer is formed using feed gases which comprise TiCl4 gas, N2 gas, an organic cyanide gas, a C2-5 hydrocarbon gas, and H2 gas. The third layer is formed using feed gases which comprise TiCl4 gas, N2 gas, an organic cyanide gas, and H2 gas and in which the content of the organic cyanide gas is less than that for the second layer.
An edge replaceable ball end mill configured so that first to third inserts having circular arc-shaped cutting edges are respectively removably mounted, by means of first to third screws, to first to third mounding seats provided at the hemispherical tip of a tool body. A first screw hole for the first screw obliquely penetrates through the first mounting seat having a slit shape. The first insert has a hole tilted so as to avoid the interference between the first screw and the second and third screws. At least a part of the hole of the first insert and at least a part of the first screw have finished surfaces, and this configuration allows, when the first screw penetrates through the first insert mounted on the first mounting seat, the first insert to be accurately positioned by the close engagement between both the finished surfaces.
The present invention relates to an end mill having a circular cutting edge of curved shape when viewed in a direction perpendicular to the tool axis, an end cutting edge composed of a medium-to-low pitch cutting edge of linear shape or circular shape, and a peripheral cutting edge. When viewed in a direction parallel to the tool axis, the edges of the circular cutting edge and the flank face of the circular cutting edge at the rearward sides thereof with respect to rotation are curved shapes having curvature radii, and the curvature radius of the circular cutting edge is smaller than the curvature radius of the flank face of the circular cutting edge at the rearward side thereof with respect to rotation.
A hard film coated tool which comprises a hard lower layer, a hard intermediate layer and a hard upper layer that are formed on a substrate by a physical vapor deposition method. The upper layer has a composition represented by (AlxCry)cOd and has an α crystal structure having a TC(110) of 1.3 or more. The intermediate layer has a gradient composition wherein the oxygen concentration increases from the lower layer side toward the upper layer side and the nitrogen concentration decreases from the lower layer side toward the upper layer side. The average composition of the intermediate layer is represented by (AlsCrt)a(NvOw)b.
Provided are a milling insert and a milling tip-replacement-type rotary cutting tool which are reduced in cutting resistance to prevent cutting edge wearing, thereby providing improved service life. When viewed in a direction perpendicular to a flank surface (22), a tip ridge (23) has a bottom portion formed as a concave arc portion (23b) and a top portion formed as a convex arc portion (23a). The concave arc portion and the convex arc portion are alternately repeated to be formed in a wave shape, and both the concave arc portion and the convex arc portion have a length of 1/4-1/3 arc inclusive. The concave arc portions are unevenly distributed so as to be closer to one of the two convex arc portions adjacent thereto and farther from the other. The convex arc portion is adapted such that an imaginary chord connecting between the end points of the convex arc portion is tilted towards the closer one of the two concave arc portions adjacent to the convex arc portion. The tip ridge is formed so as to be gradually decreased in pitch relative to a concave arc portion with increasing proximity to the closer one of the two convex arc portions adjacent to the concave arc portion.
The present invention prevents cutting debris from scattering. A cover for a cutting tool. The cover is mounted to a cutting tool which comprises a hollow shaft body, has at least one insert attached to one end surface of the shaft body, and performs cutting by making the insert in contact with a workpiece while rotating the shaft body. The cover for a cutting tool has a body section which is affixed to the front end of the shaft body and an extended section which is extended outward from the peripheral edge of the front end of the body section along the entire periphery of the body section and which covers the surface of the workpiece.
B23C 9/00 - Parties constitutives ou accessoires dans la mesure où ils sont spécialement adaptés aux machines ou aux outils de fraisage
B23Q 11/00 - Accessoires montés sur les machines-outils pour maintenir les outils ou les organes de la machine dans de bonnes conditions de travail ou pour refroidir les pièces travailléesDispositifs de sécurité spécialement combinés aux machines-outils, disposés dans ces machines ou spécialement conçus pour être utilisés en relation avec ces machines
B23Q 11/08 - Protecteurs pour des parties des machines-outilsCapots antiprojections
26.
Carbide end mill and cutting method using the end mill
Provided is a long life carbide end mill which can perform stable cutting in high-efficiency machining such as die machining and parts machining. A cutting method using such an end mill is also provided. When a certain wavy or nicked peripheral cutting edge is considered a reference peripheral cutting edge with reference phases in a pitch of the reference peripheral cutting edge, wherein the distance of each reference phase is an amount corresponding to a value obtained by dividing the pitch of the nicks or waveform of each peripheral cutting edge by the number of the cutting edges; and the phase of at least one of the remaining peripheral cutting edges is deviated in the direction of the tool axis from the corresponding reference phase by an amount corresponding to 5% or less (excluding 0%) of the pitch.
Disclosed is a process for producing a coated article having excellent corrosion resistance, wherein the coated article is produced by coating the surface of a base material for the article with a hard coating film composed of at least two layers by a physical deposition method. The process comprises a step of coating the surface of the base material with a first hard coating film and a step of coating the surface of the first hard coating film with a second hard coating film. The process additionally comprises, prior to the step of coating with the second hard coating film, a step of polishing the surface of the first hard coating film until the calculated average roughness (Ra) becomes 0.05 μm or less and the largest height (Rz) becomes 1.00 μm or less.
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
A hard film-coated tool has a hard lower layer, a hard intermediate layer, and a hard upper layer, all formed on a substrate by a physical vapor deposition method. The upper layer has a composition represented by (AlxCry)cOd and has an α crystal structure of which TC(006) is not less than 1.3. The intermediate layer has a gradient composition in which the oxygen concentration increases from the lower layer side toward the upper layer side and the nitrogen concentration decreases from the lower layer side toward the upper layer side. The average composition of the intermediate layer is represented by (AlsCrt)a(NvOw)b.
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
29.
COATED-SURFACE SLIDING PART HAVING EXCELLENT COATING ADHESION AND METHOD FOR PRODUCING THE SAME
Provided is a coated-surface sliding part having excellent adhesion of a hard coating, and a method for producing the same part. The coated-surface sliding part is a sliding part wherein a hard coating is formed by physical deposition on the surface of a base material formed from, by mass percent, C 0.5 to 0.8%, Si 0.1 to 1.5%, Mn 0.2 to 1.0%, Cr 8.0 to 13.5%, Mo and/or W 0.5 to 4.0% in terms of (Mo+1/2W), and N 0.01 to 0.1%, with the remainder being Fe and impurities. The physically deposited coating is a titanium metal coating further covered by a diamond-like carbon coating. The method for producing a coated-surface part involves sputtering in order to apply the physically deposited coating, which consists of the titanium metal coating and then the diamond-like carbon coating which forms the surface layer, to the surface of the base material having the aforementioned composition. The base material is preferably subjected to argon gas bombardment prior to application of the physically deposited coating.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/60 - Alliages ferreux, p. ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
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
30.
CARBIDE END MILL AND CUTTING METHOD USING THE END MILL
Disclosed is a long-lived carbide end mill which can ensure stabilized cutting in high efficiency machining such as die machining or parts machining, can manufacture or re-grind a tool easily at a low cost, and can set the permissible number of revolutions to a high speed by fully dispersing the cutting resistance thereby minimizing the chatter vibration. Also disclosed is a cutting method using the end mill. Specifically disclosed is a carbide end mill characterized in that when an outer peripheral cutting edge having a certain wave shape or a nick shape is an outer peripheral cutting edge of a reference shape, the phase shift of at least either wave-shaped outer peripheral cutting edge or nick-shaped outer peripheral cutting edge to the axial direction of a tool falls within a width of 5% or less of the wave pitch or the nick pitch, excluding 0%, from the respective phases of the outer peripheral cutting edge of a reference shape. Also disclosed is a cutting method wherein at least two or more kinds of cutting selected from vertical feed cutting, cross-feed cutting and oblique cutting are carried out continuously.
Provided is a tip replacement type rotary tool in which the cutting resistance can be reduced while maintaining a high chipping resistance of a main cutting edge formed on an insert and which is suitable for a highly efficient high-feed cutting. A tip replacement type rotary tool has an insert which is detachably attached to a rotary tool body and which is in the form of a polygonal planar plate or a circular plate in a plan view. The insert is provided with a negative honing and a land, on a rake surface of a main cutting edge of the insert, and a round corner cutter on a corner portion of the insert. When the insert is attached to the rotary tool body, the main cutting edge of the insert defines the lowermost point in the rotation axis direction of the rotary tool body, and the width of the negative honing or the widths of the negative honing and the land are gradually increased from the lowermost point toward the outer peripheral side direction with respect to the rotation axis direction of the rotary tool body, whereby the cutting resistance can be reduced while maintaining a high chipping resistance of the main cutting edge.
This aims to provide a ball end mill capable of preventing the occurrence of a 'pluck' off a work face. The ball end mill (10) is equipped with two cutting blades (11 and 12) formed at its spherical tips. The blade face (11a) of the cutting blade (11) has its inner circumference end arranged at a position offset farther forward of a rotating direction than a spindle. The blade face (11a) of the cutting blade (11) has its inner circumference end arranged at a position protruding by a predetermined distance from the spindle to the opposite side of the cutting blade forming side in the radial direction. The portion of the cutting blade (11) from a connecting portion (11f), which is formed midway of a ridgeline (11c) or a boundary line between the blade face (11a) of the cutting blade (11) and a flank (11b), to the outer circumference end of the cutting blade (11) is a main cutting blade (11m). The portion of the cutting blade (11) from the connecting portion (11f) to the inner circumference end of the cutting blade (11) is an auxiliary cutting blade (11s). The connecting portion (11f) of the cutting blade (11) is the portion which protrudes the farthest in the cutting blade (11) to the tip side of the spindle in the axial direction. The cutting blade (12) is constituted like the cutting blade (11).
A member covered with a hard coating film having compressive stress and a thickness of 5&mgr;m or above, characterized in that the hard coating film has a face-centered cubic structure represented by the composition formula: (Me1-aXa)α(N1-x-yCxOy) [wherein Me is at least one element selected from the group consisting of Group 4a, 5a and 6a elements; X is at least one element selected from the group consisting of Al, Si, B and S; and a, x and y are contents (atomic ratios) of X, C and O respectively and α is a (Me1-aXa)/(N1-x-yCxOy) ratio with the proviso that they satisfy the relationships: 0.1≤a≤0.65, 0≤x≤0.1, 0≤y≤0.1, and 0.85≤α≤1.25] and that in the X-ray diffraction of the hard coating film, the peak intensity (Ir) of the (111) plane, the peak intensity (Is) of the (200) plane and the peak intensity (It) of the (220) plane satisfy the relationships: 2≤Is/Ir and 0.2≤ It/Ir ≤1 with the half width, W(°), of the (200) plane of 0.7 or below (W≤0.7).
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
35.
SMALL-DIAMETER DEEP HOLE DRILL AND FINE DEEP HOLE PROCESSING METHOD
A small-diameter deep hole drill having a diameter of not more than 1 mm. In drilling of a hole having a depth (L) not less than 15 times its diameter (D) by using the deep hole drill, drilling chip penetration is suppressed and the hole has high straightness. The small-diameter drill (1) has a drill diameter (2) of not more than 1 mm and has, at its drill section (5), cutting edges (3) and grooves (4). The length (11) of the grooves (4) is not less than 5 times but not more than 10 times the drill diameter (2). The drill section (5) is shaped such that it is reduced in diameter from the cutting edges (3) to the rear of the drill section (5) and then expanded in diameter so that the outer diameter of the drill section (5) measured at ends of the grooves (4) is not less than 0.9 times but not more than 0.98 times the drill diameter (2). Further, a diameter expanded section (10) having a diameter of a size obtained by expanding the outer diameter at the ends (9) of the grooves (4) to a level not more than 1 time the outer diameter of the drill diameter (2) is provided between the drill section (5) and a neck section (6) continuing to a shank (7). The diameter of the neck section (6) is less than the drill diameter (2), and the length (12) of the neck section (6) is not less than 10 times the drill diameter (2).
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