Provided is a vibration-proof structure capable of more effectively reducing rotational vibration of a rotating body during a cutting operation. According to a configuration of the structure, inside a main body of the rotating body, there are provided a plurality of shaft members arranged along a longitudinal direction of a rotation axis of the rotating body and at least one layer of multiple tubular members fitted over the shaft members and arranged coaxially with the rotation axis along the longitudinal direction of this rotation axis; and a boundary position between the shaft members adjacent each other in the longitudinal direction and a boundary position between the tubular members adjacent each other in the longitudinal direction are set as different positions along the longitudinal direction.
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
Provided is a boring tool capable of suppressing wear of a cutting blade according to a shape of a bore to be formed in a workpiece. The tool includes a tool body to be attached to a spindle of a rotary machining tool, and a plurality of cartridges each attached to a leading end face of the tool body, having a cutting blade and being position-adjustable in a radial direction. The tool body has a coolant passage for transporting coolant along a rotational axis direction. A discharge hole for the coolant is comprised of a first discharge hole provided between the plurality of cartridges in a leading end face and a second discharge hole provided in an outer circumference of the tool body and directed toward the cutting edge of the cutting blade.
Provided is a tool-shape measurement device capable of detecting an abnormality in the shape of a tool equipped with a plurality of blade tips by using a simple configuration. A tool-shape measurement device equipped with a light-projection unit for projecting illuminating light toward a tool, a light-receiving unit that receives the illuminating light through a lens and is set in a location where the lens forms an image of the outline of the tool, and a calculation unit for calculating the location of the outline of the tool on the basis of the signal detected by the light-receiving unit, wherein: the light-receiving unit is provided with a light-receiving surface 9 perpendicular to the optical axis of the lens; line sensors 8 having a plurality of sensor elements arranged in a single direction are positioned on the light-receiving surface 9; the line sensors 8 comprise a first line sensor 8a for detecting the location of the outline of the tool in the rotational-axis direction thereof, and a second line sensor 8b for detecting the location of the outline of the tool in the radial direction thereof; and the first line sensor 8a and the second line sensor 8b are positioned at a distance from one another and not parallel to one another.
Provided is a vibration-proof structure whereby rotational vibrations of a rotating body caused during a cutting process can be more effectively reduced. The vibration-proof structure is configured so that there are provided, in the interior of the rotating body (2), multiple shaft members (20) arranged in the longitudinal direction of the rotational axis (X) of the rotating body and at least one layer of multiple cylindrical members (22) disposed over the shaft members while being coaxial with the rotational axis (X) and arranged in the longitudinal direction of the rotational axis (X), and the boundary position between longitudinally adjoining shaft members (20) and the boundary position between longitudinally adjoining cylindrical members (22) are located at different positions along the longitudinal direction.
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
B23B 27/00 - Tools for turning or boring machinesTools of a similar kind in generalAccessories therefor
Provided is a boring tool, which is able to limit wear of the cutting blades by adapting to the form of the bore in a workpiece. The boring tool is provided with: a tool body (2), which is mounted on the main shaft of a rotary machine tool; and multiple cartridges (3), which are installed on the tip surface (7) of the tool body (2) and have a cutting blade (5) and the positions of which can be adjusted in the radial direction. The tool body (2) is provided with a liquid passage (24) for transporting a cutting fluid in the direction of the rotational axis thereof. The cutting fluid discharge holes are configured from a first discharge hole (25), which is provided between the multiple cartridges (3) on the tip surface (7), and second discharge holes (26), which are provided on the outer circumference of the tool body (2) and face toward the tool edges of the cutting blades (5).
Provided is a tool holding structure capable of effectively preventing a cutting tool from coming off a chuck portion. An outer fitting portion A is formed in an outer face of a shank portion 2 of a cutting tool T and an inner fitting portion B is formed in an inner face of a chuck portion 12 of a tool holder. A fitting member 20 is provided to be fitted to the outer fitting portion A and the inner fitting portion B respectively. The fitting member 20 includes a protruding portion 22 which protrudes from an outer circumference of the shank portion 2 when fitted to the outer fitting portion A. A guide groove 18 is formed for guiding the protruding portion 22 of the fitting member 20 from an open side of an inner space 13 to the inner fitting portion B. The inner fitting portion B includes a rotation preventing face for preventing relative rotation between a holder body 10 and the cutting tool T in association with contact thereof with the protruding portion 22 and a slip-out preventing face for preventing slip-out of the cutting tool T in association with contact thereof with the protruding portion 22.
Provided is a tool holder with which the operating position and/or operating orientation of a manipulated member are easy to set according to the user's requirements. A tool holder provided with: a holder body (1); a tool-gripping section (1a) for fixing a tool (B); and a tool position-adjusting mechanism (C), which abuts against the end of the tool (B) along the holder axis (X) direction and determines the distance that the tool (B) protrudes from the holder body (1). The tool position-adjusting mechanism (C) is provided with: an adjustment member (4), which moves back and forth along the holder axis (X) direction inside the holder body (1) and is able to abut against the tool (B); an intermediate member (5), which is able to rotate around an axis (Y) that differs from the holder axis (X) while contacting the outer surface of the adjustment member (4) ; and an operating member (6), which can be operated from the outside of the holder body (1) and transmits rotational force to the intermediate member (5).
B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
In this hydraulic chuck, a pressurization fluid pressurized by a push-in member (8b) is supplied to a pressurization chamber (6) via a pressurization passage (8) to reduce the diameter of an elastic deformation part (2b), in order to enable accurate and efficient cutting work to be performed with respect to a narrow region. The hydraulic chuck is provided with: a body (1) provided with a flange accommodation part (5a) which opens to a small-diameter part of a tip thereof, and a sleeve accommodation part (5b) which opens to a bottom surface of the flange accommodation part (5a); and a sleeve (2) which is capable of being fitted by being inserted from a tip side of the flange accommodation part (5a) into the sleeve accommodation part (5b), and is provided with an aperture (2a) into which a body to be held is inserted, and a flange (7) which is fitted into the flange accommodation part (5a), and which forms, in a space between the flange (7) and the sleeve accommodation part (5b), the pressurization chamber (6) having the pressurization fluid stored therein.
Provided is a tool holding structure that effectively prevents a cutting tool from falling out from a chuck part. An outer fitting section (A) is formed on the outer surface of a shank part (2) of a cutting tool (T), and an inner fitting section (B) is formed on the inner surface of a chuck part (12) of a tool holder. A fitting member (20), which fits into the outer fitting section and the inner fitting section, is provided. The fitting member (20) has a protruding section (22) that protrudes from the outer periphery of the shank part (2) when fitted to the outer fitting section (A). The tool holding structure is provided with: a rotation-preventing surface, wherein a guide groove (18), which extends from an open side of an internal space (13) to the inner fitting section (B) and guides the protruding section (22) of the fitting member (20), is formed, and a holder body (10) and the cutting tool (T) are prevented from rotating relative to each other due to the protruding section (22) being in contact with the inner fitting section (B); and a slip-out-preventing surface, wherein the cutting tool (T) is prevented from slipping out due to the protruding section (22) being in contact with the inner fitting section (B).
Provided is a tool holding structure capable of effectively preventing a cutting tool from coming off a chuck portion. An outer fitting portion A is formed in an outer face of a shank portion 2 of a cutting tool T and an inner fitting portion B is formed in an inner face of a chuck portion 12 of a tool holder. A fitting member 20 is provided to be fitted to the outer fitting portion A and the inner fitting portion B respectively. The fitting member 20 includes a protruding portion 22 which protrudes from an outer circumference of the shank portion 2 when fitted to the outer fitting portion A. A guide groove 18 is formed for guiding the protruding portion 22 of the fitting member 20 from an open side of an inner space 13 to the inner fitting portion B. The inner fitting portion B includes a rotation preventing face for preventing relative rotation between a holder body 10 and the cutting tool T in association with contact thereof with the protruding portion 22 and a slip-out preventing face for preventing slip-out of the cutting tool T in association with contact thereof with the protruding portion 22.
Provided is a tool holding structure that effectively prevents a cutting tool from falling out from a chuck part. An outer fitting section (A) is formed on the outer surface of a shank part (2) of a cutting tool (T), and an inner fitting section (B) is formed on the inner surface of a chuck part (12) of a tool holder. A fitting member (20), which fits into the outer fitting section and the inner fitting section, is provided. The fitting member (20) has a protruding section (22) that protrudes from the outer periphery of the shank part (2) when fitted to the outer fitting section (A). The tool holding structure is provided with: a rotation-preventing surface, wherein a guide groove (18), which extends from an open side of an internal space (13) to the inner fitting section (B) and guides the protruding section (22) of the fitting member (20), is formed, and a holder body (10) and the cutting tool (T) are prevented from rotating relative to each other due to the protruding section (22) being in contact with the inner fitting section (B); and a slip-out-preventing surface, wherein the cutting tool (T) is prevented from slipping out due to the protruding section (22) being in contact with the inner fitting section (B).
Provided is a tap holder configured so that compression-side elastic characteristics and tension-side elastic characteristics are different from each other with utilization of an elastic member for absorbing synchronization error in rotation and feeding of a spindle of a machine tool. The tap holder includes a chuck 20 for holding a tap P, and a holder body 10 for holding the chuck 20 so that the chuck 20 is movable along a rotational axis X and rotatable in synchronism with the chuck 20. The tap holder further includes elastically deforming members 31, 32, 33 provided in a tension direction and a compression direction, respectively and deformable between the chuck 20 and the holder body 10 when a tension force or a compression force is applied to the tap P along the direction of the rotational axis X, and a deformation reducing mechanism 29 for the elastically deforming members 31, 32, 33 such that a deformation amount along the rotational axis X generated in at least one elastically deforming member 31, 32 of the elastically deforming members 31, 32, 33 disposed respectively in the tension direction and the compression direction is smaller than an amount of displacement of the chuck 20 along the rotational axis X.
An insert includes a rake angle set corresponding to the hardness of a material to be cut and that can suppress an increase in the material cost even when the strength of a cut edge section is increased. The insert has a polygonal shape and includes a cutting edge portion on at least one side of the polygonal shape. The cutting edge portion includes a rake face having a convex formed on one of opposite surfaces in the thickness direction a flank face having a concave formed on a surface intersecting with the one surface in the thickness direction and a concave cutting edge that is formed between the rake face and the flank face.
A vibration damping mechanism allows increase of an absorption amount of vibration energy, with less possibilities of increase in the manufacture cost of a vibration damping weight and of reduction in the strength of a shaft section. Within a cylindrical hollow portion formed inside the shaft section, there are accommodated a plurality of weight members divided from each other along the circumferential direction about the axis of the hollow portion. An urging member is provided for urging the weight members toward the axis such that dividing faces of adjacent weight members are brought into surface contact with each other.
F16F 7/08 - Vibration-dampersShock-absorbers with friction surfaces rectilinearly movable along each other
B23B 27/00 - Tools for turning or boring machinesTools of a similar kind in generalAccessories therefor
F16F 15/14 - Suppression of vibrations in rotating systems by making use of members moving with the system using freely-swinging masses rotating with the system
F16F 15/32 - Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
Provided is a tap holder configured so that the compression-side elastic characteristics and the tension-side elastic characteristics are made to be different using an elastic member for absorbing synchronization errors in the rotation and feeding of the main shaft of a machine tool. This tap holder is provided with a chuck (20) for holding a tap (P), and a holder main body (10) for holding the chuck (20) so that the chuck (20) can move along the axial center (X) of rotation and rotate in synchrony with the chuck (20); has elastically deformable bodies (31, 32, 33) provided in the tensile direction and the compression direction, the elastically deformable bodies deforming between the chuck (20) and the holder main body (10) when a tensile force or a compression force has acted on the tap (P) along the direction of the axial center (X) of rotation; and has a mechanism (29) for reducing deformation in the elastically deformable bodies (31, 32) in which the amount of deformation along the axial center (X) of rotation generated in at least one of the elastically deformable bodies (31, 32) among the elastically deformable bodies (31, 32, 33) arranged in the tensile direction and the compression direction is less than the amount by which the chuck (20) is displaced along the axial center (X) of rotation.
Provided is an insert which can have a rake angle corresponding to the hardness of a material to be cut and which is configured so that a rise in the material cost can be minimized even if the strength of the cutting edge section is increased. An insert has a polygonal shape and has a cutting edge section (3) at at least one side of the polygon. The cutting edge section (3) is provided with a recessed cutting edge (4) comprising: a rake face (12) which has a protrusion formed on one surface in the thickness direction; and a flank face (11) which has a recess formed in the surface intersecting the one surface in the thickness direction.
Provided is a vibration damping mechanism configured to absorb a large amount of vibration energy and obtained with a minimum increase in the cost of producing the weight for damping vibration and with a minimum reduction in the strength of a shaft section. A cylindrical hollow section (6) formed within a shaft section (1) has received therein weight members (14) which are separated circumferentially about the axis of the hollow section. Pressing members (16) are provided in the hollow section (6), the pressing members (16) pressing the weight members (14) toward the axis so that the surfaces (15) of the separation of the adjacent weight members are in surface contact with each other.
F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system
B23B 27/00 - Tools for turning or boring machinesTools of a similar kind in generalAccessories therefor
B23C 9/00 - Details or accessories so far as specially adapted to milling machines or cutters
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
F16F 7/08 - Vibration-dampersShock-absorbers with friction surfaces rectilinearly movable along each other
patents
