388results about "Cutting inserts" patented technology

A cutting insert includes a rake face, a flank face, and a cutting edge constituted of a ridgeline between the rake face and the flank face. The cutting edge has a first cutting edge portion for corner processing, a second cutting edge portion for low cut-in pulling processing, a third cutting edge portion for high cut-in pulling processing, a fourth cutting edge portion for finished-surface processing, a first connection cutting edge portion, a second connection cutting edge portion, and a third connection cutting edge portion. The fourth cutting edge portion is disposed between the first cutting edge portion and the second cutting edge portion. The second cutting edge portion is disposed between the fourth cutting edge portion and the third cutting edge portion. Each of the first cutting edge portion, the second cutting edge portion, and the fourth cutting edge portion has a curved shape.

A cutting insert has a top surface, a bottom surface, and an outer peripheral surface. A ridgeline between the top surface and the outer peripheral surface includes a first cutting edge. A protrusion is provided on the top surface. In a first cross section, a distance between the first cutting edge and the protrusion in a direction perpendicular to the bottom surface is defined as a first distance. In a second cross section, a distance between the first cutting edge and the protrusion in a direction perpendicular to the bottom surface is defined as a third distance. The third distance is longer than the first distance. A ratio of a height of the protrusion to a width of the protrusion in the second cross section is smaller than a ratio of a height of the protrusion to a width of the protrusion in the first cross section.

A cutting insert includes at least two peripheral cutting edges. An insert holder assembly includes an insert holder which include an insert pocket and an ejector chamber connected by a through hole. The insert holder assembly includes an ejector member located at least partially in the ejection chamber, and a compressible biasing member. In an inner position, the biasing member exerts a compressive force on the ejector member. When the cutting insert is releasably attached to the insert holder by a fastening member which is connected to the ejector member, to constitute a fastened position of a cutting tool, the insert holder assembly is in the inner position and the fastening member clamps the cutting insert so that the insert lower surface abuts the pocket base surface.

A cutting tool has an indexable cutting insert removably secured to a holding portion of an insert holder. The cutting insert has opposing first and second end surfaces with an insert peripheral surface and a central axis extending therebetween, at least two cutting portions, and at least one mounting cut-out. Each cutting portion has a cutting edge formed by the intersection of rake and relief surfaces formed on the insert peripheral surface, one rake surface facing in a first rotary direction about the central axis and one rake surface facing in an opposite second rotary direction. Each mounting cut-out extends between the first and second end surfaces and has spaced apart first and second flank surfaces disposed on a cut-out peripheral surface which is separate and spaced apart from the insert peripheral surface. The first and second flank surfaces face in the first and second rotary directions, respectively.

The invention relates to the technical field of machining numerical control tools, in particular to a multifunctional indexable heavy boring head which comprises a main body, a blade seat and a blade, the main body comprises a body, a seat body and a connecting part which are integrally formed, the blade is fixedly installed on the blade seat, the seat body comprises a seat body H and a seat body S, the seat body H is higher than the seat body S, and the connecting part is connected with the seat body H; the blade seat comprises a blade seat H and a blade seat S, the blade seat H is higher than the blade seat S, the blade seat H is fixedly installed on one seat body, and the blade seat S is fixedly installed on the other seat body. The device has the advantages that the device is simple in overall structural design, easy to understand by an operator, small in accessory type number and convenient to assemble; by means of the same double-edge heavy boring head, switching between symmetrical boring and stepped boring can be achieved only by adjusting the position of the tool changing base on the base body and then adjusting the blade in the radial direction, tool changing is not needed, production efficiency is improved, switching is easy and convenient, and the tool storage pressure of a tool stock is reduced.

A cutting tool has a cutting insert removably secured to a holding portion of an insert holder. The cutting insert has opposing first and second end surfaces with an insert peripheral surface and a central axis extending therebetween, at least one cutting portion, and at least one mounting cut-out. Each cutting portion has a cutting edge and an adjacent relief surface facing in a first rotary direction about the central axis. Each mounting cut-out extends between the first and second end surfaces and has a first flank surface and an adjacent first upper slope surface. The first flank surface faces in a second rotary direction about the central axis and the first upper slope surface faces away from a median plane located midway between the first and second end surfaces. The first upper slope surface extends away from the median plane with increasing distance from the first flank surface.

To provide a body provided with a flow passage having a sufficient cross-sectional area while securing sufficient rigidity, and a cutting tool.SOLUTION: A body 10 of a cutting tool 1 includes: an insert pocket 20 to which a cutting insert 60 is attached; a screw hole 22 into which an insert mounting screw 70 for fastening the cutting insert 60 to the insert pocket 20 is screwed and inserted; and a chip discharging coolant flow passage 50 for discharging coolant C from a discharge port 52 open at a tip. In a cross section orthogonal to an axial direction, at least a portion of the chip discharging coolant flow passage 50 has a distance Da from the insert pocket 20, a distance Db from the screw hole 22, and a distance Dc from an outer periphery 10c of the body 10 which are equal to or larger than a prescribed dimension.SELECTED DRAWING: Figure 5

A cutting tool includes a tool body having at least one seat for receiving a cartridge or a cutting insert. The seat includes at least one support surface. The cutting tool body includes a sensor retaining structure adjoining the support surface and a piezo sensor arranged in the sensor retaining structure. The cutting tool has a clamping device for securing the cartridge or cutting insert. The piezo sensor is an elastically deformable piezo sensor, which has a central longitudinal axis and a direction of sensitivity perpendicular to the central longitudinal axis. The piezo sensor has a measuring section, along which the central longitudinal axis is substantially parallel to the support surface. The piezo sensor is elastically deformed in the sensor retaining structure to a pre-stressed initial state and deformable to a plurality of further stressed measuring states.

A cutting insert may include an upper surface, a lower surface, a lateral surface and a cutting edge. The upper surface may include a first corner, a first side, a second side and a rake surface. The cutting edge may include a first cutting edge located on the first corner, and a second cutting edge located on the first side. The first cutting edge may include a first part. The first part may be located between a midportion of the first corner and the first side, and may come closer to a reference plane as going away from the first side. The rake surface may include a first region located along the first part. A rake angle in the first region may become smaller as coming closer to the midportion of the first corner.

A cutting tool includes: a cutting edge configured on an intersecting line of a rake surface and a flank; a breaker wall formed inside the cutting edge and protruding above the cutting tool; a boss part including a boss surface formed above the breaker wall; and a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge. The width of the breaker wall in a direction in which the cutting edge extends along an intersecting line (including a virtual intersecting line or a virtual extension of the intersecting line) of the boss surface and the breaker wall, is greater than the width of a groove formed by the recessed part along the same intersecting line.

A cutting insert according to an aspect includes a base portion and a cutting portion. The cutting portion includes a front end surface, an top surface, a first lateral surface, a second lateral surface, a front cutting edge, and a lateral cutting edge. The front cutting edge includes a first cutting edge and a second cutting edge, and a radius of curvature of the first cutting edge is greater than a radius of curvature of the second cutting edge.

A machining method for cutting process by making a workpiece (W) and a cutting tool (11) move relatively, characterized by using a cutting tool (11) comprising a cutting insert (28) having a first curved part (40a), a second curved part (40c) formed continuing from the first curved part (40a) and with a curvature smaller than the first curved part (40a), and a connecting part (40b) connecting the first curved part (40a) and the second curved part (40c) and by cutting while positioning the connecting part (40b) at the front end in the cut direction perpendicular to the direction of relative movement at the time of cutting.

The invention relates to a cutting insert (1, 10) for a turning tool. The cutting insert comprises a top surface (2), a bottom surface (3), a front surface (6), a rear surface (7) and first and second side surfaces (4, 5). A longitudinal axis (A1) intersects the front and rear surfaces (6, 7) and extends mid-way between the first and second side surfaces (4, 5). A cutting edge (8) is formed at an intersection between the top surface (2) and the front surface (6), wherein the cutting edge (8) comprises a surface generating cutting edge (9), a first major cutting edge portion (17) and a first corner cutting edge (15). The first major cutting edge portion (17) extends rearward from the surface generating cutting edge (9), and the first corner cutting edge (15) extends rearward from the first major cutting edge portion (17). In a plan view of the top surface, the first corner cutting edge (15) is convexly curved and has a first length of extension (L1) and the surface generating cutting edge (9) is convexly curved and has a second length of extension (L2), wherein the first length of extension (L1) is greater than the second length of extension (L2).

A grooving or part-off tool assembly for Swiss-style machining includes a holder. The holder includes a resilient normally-closed holder clamp. In a preferred embodiment the holder clamp biases a blade holding a cutting insert against a pocket side abutment surface of a holder pocket.

The present invention can realize better cutting performance while suppressing an influence of, for instance, deflection of a head and an increase in a moment acting on a fastening mechanism even when a cutting insert of a long total length is used. A shank of a head replaceable type cutting tool includes: a fastening mechanism that is formed at a leading end part in a longitudinal direction of the shank, and attaches a head; and a recessed part that is formed at the leading end part so as to accommodate a part of a cutting insert held by the head and avoid an interference with the cutting insert. The recessed part may be provided to accommodate a non-use part of the cutting insert held by the head in a state where the head is attached to the leading end part, and avoid an interference with the cutting insert.

Provided is a cutting insert or the like that is capable of copy machining in a narrow space and is also highly economical. A cutting insert (3) has a first end portion (4) and a second end portion (5) formed in substantially the same shape. A cutting edge (10) of the first end portion (4) includes a curved corner cutting edge (13) and a pair of lateral cutting edges (11 and 12) disposed such that both ends (13L and 13R) of the corner cutting edge (13) are sandwiched therebetween. The pair of lateral cutting edges (11 and 12) are formed linearly and form an acute angle (Y). A side surface (9) has a corner flank (94) continuous with the corner cutting edge (13) and a flat surface (95) disposed further toward a bottom surface (8) than the corner flank (94) at a portion (93) abutting on the corner cutting edge (13).

A cutting tool includes: a cutting edge configured on an intersecting line of a rake surface and a flank; a breaker wall formed inside the cutting edge and protruding above the cutting tool; a boss part including a boss surface formed above the breaker wall; and a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge. The width of the breaker wall in a direction in which the cutting edge extends along an intersecting line (including a virtual intersecting line or a virtual extension of the intersecting line) of the boss surface and the breaker wall, is greater than the width of a groove formed by the recessed part along the same intersecting line.

A four-way indexable plate-shaped cutting insert () that is indexable about a central insert axis and a cutting tool. The cutting includes a base body, a first insert side surface, a second insert side surface opposite the first insert side surface, a peripheral insert surface that connects the first insert side surface and the second insert side surface, and four cutting arms. The peripheral insert surface of each cutting arm includes a rake surface, a relief surface facing in the opposite direction, and a cutting edge formed at an intersection of the rake surface and the relief surface. The first insert side surface includes a first portion that is farther away from an insert median plane than the another portion thereof. The first insert abutment portion defines a coolant groove that is recessed in the first insert abutment portion. The coolant groove opening out to the first arm side portion.

A cutting tool has an indexable cutting insert removably secured to a holding portion of an insert holder. The cutting insert has opposing first and second end surfaces with a peripheral side surface extending therebetween and a central mounting portion. The cutting insert has a plurality of cutting portions circumferentially spaced apart about a central axis, each cutting portion having a rake and relief surfaces located on the peripheral side surface. The central mounting portion has a plurality of female type or male type mounting elements having opposing first and second mounting flanks. The plurality of rake surfaces and first mounting flanks face in a first direction about the central axis, the plurality of second mounting flanks face in a second direction about the central axis opposite to the first direction, and each second mounting flank extends further from the central axis than its associated opposing first mounting flank.

A rotary tool (2) is specified, comprising a cutting insert (4) having at least one cutting portion (10) and a fastening portion (12), where the fastening portion (12) has a fastening surface (40), and a clamping holder (6) having a support projection (26) and a support (24), where the support projection (26) and the support (24) are configured to support the cutting portion (10) and the fastening portion (12). Wherein the fastening part (12) has a fastening part upper side (30) and a fastening part lower side (32), each of which is designed in a stepped manner in the axial direction (A), and wherein an upper side part surface (34) of the fastening part upper side (30) bears against a support projection surface (52) of the support projection (26), and an underside part surface (36, 38) of the fastening part underside (32) abuts against the support (24). A cutting insert (4) and a clamping holder (6) are also specified.

A system for automated mounting and dismounting of at least one cutting insert on a tool body with a screwing tool is provided. The cutting insert includes a top surface, a bottom surface, a circumferential side surface connecting the top and bottom surfaces, and a through hole extending from the top surface to the bottom surface for receiving the shaft of a fastening screw. A carrier device is arranged to pick up and release the cutting insert with the fastening screw. The carrier device has a body having a front surface, a rear surface, a circumferential side surface connecting the front and rear surfaces, and a channel extending from a front end opening in the front surface to a rear end opening in the rear surface. A method for automated mounting of a cutting insert with a fastening screw on a tool body is also provided.

A cutting insert includes: a rake face; a flank face; and a cutting edge constituted of a ridgeline between the rake face and the flank face. The cutting edge has a first cutting edge portion for corner processing, a second cutting edge portion for pulling processing, a third cutting edge portion for finished-surface processing, a first connection cutting edge portion, and a second connection cutting edge portion. The third cutting edge portion is disposed between the first cutting edge portion and the second cutting edge portion. The first cutting edge portion has a curved shape. A curvature radius of the first cutting edge portion is 0.1 mm or more and 2.4 mm or less. The second cutting edge portion has a straight line shape or a curved shape having a curvature radius of 3 mm or more.

The present invention discloses an insert adaptor for parting off having an adaptor index axis and comprising: parallel and planar adaptor first and second sides connected by an adaptor peripheral surface which extends peripherally around the adaptor; the adaptor index axis extending through the center of the first and second sides; wherein the adaptor peripheral surface is formed with a plurality of pockets which are configured for resilient clamping and bearing surfaces extending between the pockets; characterized in that: the insert adaptor has a material volume of greater than 50% of an imaginary cylinder encompassing the insert adapter; and each of the bearing surfaces are straight.

The objective of the present invention is to provide a quick-change type tool shank structure with high positioning accuracy. [Solution] The tool holder includes a head portion, a tool holder, and a tool shank which are connected in sequence, a communication through hole is provided in the center of the tool holder and the tool shank, two threaded bolts are provided in the through hole, both ends of the two threaded bolts are connected to the head portion and the tool shank, respectively, and a head portion fitting hole is provided on the inner cylindrical surface of the end of the through hole of the tool holder which is closer to the head portion, and the head portion fitting hole is fitted and connected to the head portion. The present invention has the following advantageous effects: The head portion and the tool shank are connected by two threaded bolts, and the tool holder does not need to be threaded, so that a hard alloy material can be used for the tool holder, and further, in combination with the structure of the fitting hole, the technical problem that the structure of the conventional tool shank is too complicated is solved, and a tool holder structure which is simple in structure and has high positioning accuracy is obtained.

In a cutting tool having an indexable cutting insert (20) with exactly four cutting portions (26), the cutting insert is removably securable to an insert holder by a fastener. The cutting insert (20) has two opposing end surfaces (22) with a peripheral side surface (24) extending therebetween, and each cutting portion (26) has a major cutting edge (28) formed by the intersection of a rake surface (30) and a relief surface (32). The peripheral side surface (24) has first and second pairs of opposing side surfaces (34, 36) which include the four relief surfaces (32) and the four rake surfaces (30), respectively. In an end view, four cutting points on the four major cutting edges (28) define the transitions between the first and second pairs of opposing side surfaces (34, 36), and a minimum first length dimension between the second pair of opposing side surfaces (36) is less than six-tenths of a minimum second length dimension between two of the four cutting points.

To improve rigidity of a cutting tool having a cutting insert and make a space occupied by the cutting tool narrower.SOLUTION: In a cutting insert 10, which has a first end face 11. a second end face 12 and a circumferential side face 13 connecting the first end face 11 to the second end face 12 and comprising a cutting blade 21, contour shapes of the first end face 11 and the second end face 12 have longitudinal directions and transverse directions respectively, and a rake face 22 facing the respective longitudinal directions of the first end face 11 and the second end face 12 is provided on at least a portion of the circumferential side face 13.SELECTED DRAWING: Figure 3

Provided are a cutting insert and a cutting tool, wherein the cutting insert can be retained by a thin retainer and can suppress reduction in the positional accuracy of the cutting edge. The cutting insert includes a first end face, a second end face, and a peripheral side face, wherein the peripheral side face is connected to the first end face and the second end face, and has a rake face, a flank face, and a cutting edge formed in a connecting area between the rake face and the flank face. The cutting insert is formed with a through hole passing through the first end face and the second end face, and includes a first abutting face that is slightly perpendicular to the central axis direction of the through hole and can abut against the retainer, a second abutting face that is slightly parallel to the central axis direction of the through hole and slightly perpendicular to the plane containing the first abutting face and can abut against the retainer, and a third abutting face that is inclined relative to the central axis direction of the through hole and can abut against the retainer. The cutting tool includes such a cutting insert.

The invention relates to a tool (10) for machining a workpiece, comprising a tool holder (12) extending along a holder longitudinal axis (36) and an insert (14) which can be fastened to the tool holder (12) by means of a fastening element (18). The tool (10) is particularly suitable for profile turning. According to the invention, a projection (68) is arranged on the insert (14), said projection projecting from an insert-side bearing surface (66), said projection engaging in a recess (40) provided on the tool holder in the mounted state of the tool (10), said recess leading into a holder-side bearing surface (38). Three blade-side contact surfaces (72, 74, 76), which are oriented transversely to one another, are arranged laterally on the projection (68), wherein two contact surfaces bear against two holder-side contact surfaces (44, 46) forming a side wall of the recess (40) in the mounted state of the tool (10). In addition, in the mounted state of the tool (10), the blade (14) bears with its blade-side bearing surface (66) against the holder-side bearing surface (38) of the tool holder (12).

A cutting tool comprising a substrate and a coating disposed on the substrate, wherein the coating includes a first layer, and the first layer is composed of an alternating layer in which a first unit layer and a second unit layer are alternately laminated, and the first unit layer is Al a Ti (1-a-b) Si b N, and the second unit layer is Al c Cr (1-c-d) Cu d N, and a, b, c, and d satisfy 0.50 ≦ a ≦ 0.75, 0.005 ≦ b ≦ 0.20, 0.50 ≦ c ≦ 0.85, and 0.005 ≦ d < 0.10, and the average thickness of the first unit layer is 2 nm or more and 50 n m or less, and the average thickness of the second unit layer is 2 nm or more and 50 n m or less.

An embodiment of a cutting insert is provided. The cutting insert includes an upper surface, a lower surface, a plurality of side surfaces extending between the upper surface and the lower surface, an insertion hole extending through the upper surface and the lower surface, and a corner portion provided with a cutting edge. At least one of the upper surface and the lower surface has a plurality of recesses extending between the insertion hole and the corner portion. The plurality of recesses includes a first recess into which a portion of a mounting portion is inserted when the cutting insert is supported by the mounting portion and a second recess into which another portion of the mounting portion is inserted when the cutting insert is supported by the mounting portion. The second recess has a sidewall spaced apart from the another portion of the mounting portion.