WO2004062839A1

WO2004062839A1 - Grooving cutting tool and throw-away tip

Info

Publication number: WO2004062839A1
Application number: PCT/JP2003/017022
Authority: WO
Inventors: Tomoyoshi Sakamoto
Original assignee: Mitsubishi Materials Corporation
Priority date: 2003-01-08
Filing date: 2003-12-26
Publication date: 2004-07-29
Also published as: JP2004209615A; AU2003296189A1

Abstract

A grooving cutting tool, wherein serrations (40) and (60) formed by alternately arranging a plurality of groove parts (41) and (61) and crest parts (42) and (62) extending along the direction of an axis (O) are formed in the first tip restricting surface (31) of a tip mounting seat (30) and on the upper surface (51) center portion (51A) of a tip (50), and the serrations (40) and (60) formed by alternately arranging the plurality of groove parts (41) and (61) and crest parts (42) and (62) extending along the direction of the axis (O) are formed in the second tip restricting surface (32) of the tip mounting seat (30) and on the lower surface (52) of the tip (50), whereby the mounting rigidity of the tip can be increased.

Description

Grooving pipes and throwaway chips

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grooving tool mainly used for performing grooving or parting-off on the outer periphery of a workpiece in turning and a throw-away tip (hereinafter, referred to as a chip) mounted on the grooving tool. Things.

This application is based on a patent application to Japan (Japanese Patent Application No. 2003-0202 37), and the contents of this Japanese application are incorporated as a part of this specification. Shall be accepted. Background art

Conventionally, as this kind of grooving tool, there has been known a grooving tool disclosed in Japanese Patent Application Laid-Open No. 8-18763 (paragraph 008). A tip mounting seat having a pair of chip restraining surfaces opposed to each other is formed at a tip end portion of the cutting tool body extending along the axial direction. The tip mounting seat has one end in the longitudinal direction on the upper surface. A chip having a cutting edge formed on the ridge is mounted so that the cutting edge protrudes from the tool body toward the tip end in the axial direction.

The pair of chip binding surfaces press and fix the upper and lower surfaces of the chip by the elastic deformation of the cutting tool body as the clamping means. These pair of chip binding surfaces are convex V-shaped along the axial direction, respectively. Corresponding to this, the upper and lower surfaces of the chip are also formed in a concave V shape along the axial direction (longitudinal direction). However, in the grooving tool described in Japanese Patent Application Laid-Open No. Hei 8-187603, the contact surfaces where the pair of chip restraining surfaces and the upper and lower surfaces of the chip are in contact with each other. However, since they are merely V-shaped, they cannot be said to have a sufficiently large contact area, and it is difficult to secure high mounting rigidity of the chip. . Disclosure of the invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a grooving tool capable of maintaining a high mounting rigidity of a chip and a chip mounted on the grooving tool.

In order to solve the above problems and achieve such an object, a grooved cutting tool according to the present invention includes a pair of tips opposed to each other at a tip end of a cutting tool body extending along an axial direction. A tip mounting seat having a constraining surface is formed. The tip mounting seat has a tip having a cutting edge formed on a ridge line on one end side in the longitudinal direction on the upper surface. The pair of chip restraining surfaces are mounted so as to protrude to the distal end side, and the pair of chip restraining surfaces is a grooving tool for pressing and fixing the upper and lower surfaces of the chip by clamping. A plurality of grooves and ridges extending along the direction are alternately arranged, and a selection is formed on each of the upper and lower surfaces of the chip, corresponding to the shape of the pair of chip constraint surfaces. In which so that a serration is formed.

With such a configuration, a serration formed by alternately arranging a plurality of grooves and peaks is formed of two contact surfaces formed by a pair of chip restraining surfaces of the chip mounting seat and upper and lower surfaces of the chip being in contact with each other. As a result, the contact surfaces in the form of a wave are formed, so that the contact area can be increased and the mounting rigidity of the chip can be increased.

Here, as described above, when the two contact surfaces formed by the pair of chip restraining surfaces and the upper and lower surfaces of the chip in the chip mounting seat are in contact with each other, when the serrations are formed into a corrugated shape, for example, When the plurality of grooves (peaks) constituting the serration have the same shape, and the pitches of the selections formed on the pair of chip restraining surfaces (the upper and lower surfaces of the chip) are the same, respectively. The chip can be inserted into the chip mounting seat even if some grooves and peaks to be engaged are misaligned, and the upper and lower surfaces of the chip can be pressed and fixed by a pair of chip restraining surfaces. This can cause the cutting edge to shift due to the incorrectly inserted tip.

Therefore, the grooving tool of the present invention adopts the following configuration. That is, it is preferable that the chip can only be inserted at an accurate position, the groove portion and the crest portion located at positions where they are to be engaged with each other are accurately engaged, and erroneous insertion of the chip is prevented.

When viewed in a cross section orthogonal to the axial direction, at least one of the selections formed on each of the pair of chip constraint surfaces has at least one groove and another groove. Are different from each other, or the shape of at least one peak is different from the shape of another peak

When viewed in a cross section orthogonal to the axial direction, a pitch of the serration formed on one of the pair of chip restraining surfaces and a pitch of the selection formed on the other are different from each other. Is

Further, when viewed in a cross section orthogonal to the axial direction, the serrations respectively formed on the pair of chip constraint surfaces are preferably symmetrical with respect to a width direction central portion. When the cutting edge is also formed on the other end side ridge line in the longitudinal direction on the upper surface of the tip, the cutting edge formed on the other end side ridge is projected from the cutting tool body toward the front end side. The tip can be reattached to the tip, and the position of the cutting edge does not shift.

Further, the chip according to the present invention is a chip in which a cutting edge is formed on a ridge line on one end side in a longitudinal direction on an upper surface opposed to a lower surface, wherein the upper and lower surfaces have a plurality of grooves extending along the longitudinal direction. Selections in which mountains are alternately arranged are formed.

Further, when viewed in a cross section orthogonal to the longitudinal direction, at least one of the serrations respectively formed on the upper and lower surfaces, the shape of at least one groove and the shape of another groove are different from each other. Alternatively, the shape of at least one ridge and the shape of another ridge are different from each other, or the pitch of the selection formed on one of the upper and lower surfaces and the pitch of the serration formed on the other. It is preferable that the switches are different from each other.

Also, when viewed in a cross section orthogonal to the longitudinal direction, it is preferable that the serrations formed on the pair of chip bundle surfaces are respectively symmetrical with respect to the center in the width direction. Further, it is preferable that a cutting edge is also formed on the other end side ridge line in the longitudinal direction on the upper surface. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view showing a grooving tool according to a first embodiment, which is a basic configuration of the present invention.

FIG. 2 is a top view showing a grooving tool according to the first embodiment, which is a basic configuration of the present invention.

FIG. 3 is a front end view showing the grooving tool according to the first embodiment, which is a basic configuration of the present invention.

FIG. 4 is a side view showing a chip of the grooving tool according to the first embodiment, which is a basic configuration of the present invention.

FIG. 5 is a top view showing a grooving byte chip according to the first embodiment, which is a basic configuration of the present invention.

FIG. 6 is a front end view showing a tip of a grooving tool according to the first embodiment, which is a basic configuration of the present invention.

FIG. 7 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving tool according to the first embodiment, which is a basic configuration of the present invention.

FIG. 8 is an enlarged front view of an essential part for explaining a chip mounting state of a grooving byte according to a second embodiment of the present invention.

FIG. 9 is an enlarged front view of a main part for describing a chip mounting state of a grooving byte according to a third embodiment of the present invention.

FIG. 10 is an enlarged front view of an essential part for explaining a chip mounting state of a grooving byte according to a fourth embodiment of the present invention.

FIG. 11 is an enlarged front view of a main part for describing a chip mounting state of a grooving byte according to a fifth embodiment of the present invention.

FIG. 12 is an enlarged front view of an essential part for describing a chip mounting state of a grooving byte according to a sixth embodiment of the present invention.

FIG. 13 illustrates a state in which a grooving tool according to a seventh embodiment of the present invention is mounted on a chip. FIG. 6 is an enlarged front view of a main part for performing the operation.

FIG. 14 is an enlarged front view of an essential part for explaining a chip mounting state of a grooving byte according to an eighth embodiment of the present invention.

FIG. 15 is an enlarged front view of an essential part for explaining a chip mounting state of a grooving tool according to a ninth embodiment of the present invention.

FIG. 16 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving byte according to the tenth embodiment of the present invention.

FIG. 17 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving byte according to the eleventh embodiment of the present invention.

FIG. 18 is an enlarged front view of an essential part for explaining a tip mounting state of the grooving tool according to the 12th embodiment of the present invention.

FIG. 19 is an enlarged front view of a main part for explaining a chip mounting state of the grooving byte according to the thirteenth embodiment of the present invention.

FIG. 20 is an enlarged front view of a main part for explaining a chip mounting state of the grooving byte according to the fourteenth embodiment of the present invention.

FIG. 21 is an enlarged front view of an essential part for explaining a chip mounting state of a grooving byte according to a fifteenth embodiment of the present invention.

FIG. 22 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving byte according to the sixteenth embodiment of the present invention.

FIG. 23 is an enlarged front view of a main part for explaining a chip mounting state of the grooving byte according to the seventeenth embodiment of the present invention.

FIG. 24 is an enlarged front view of an essential part for explaining a tip mounting state of the grooving tool according to the eighteenth embodiment of the present invention.

FIG. 25 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving byte according to the ninth embodiment of the present invention.

FIG. 26 is an enlarged front view of an essential part for explaining a chip mounting state of the grooving byte according to the 20th embodiment of the present invention,

FIG. 27 is an enlarged front view of a main part for describing a chip mounting state of the grooving tool according to the 20th embodiment of the present invention. FIG. 28 is a side view showing the grooving tool according to the twenty-first embodiment of the present invention. FIG. 29 is a side view showing the tip of the grooving tool according to the 21st embodiment of the present invention.

FIG. 30 is a top view showing a chip of the grooving pite according to the 21st embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

First, a first embodiment as a basic configuration of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the grooving tool 10 according to the first embodiment has a tool body 11 that extends along the axial direction and forms a substantially quadrangular prism centered on the axis 0. The tip 1 2 of the cutting tool body 11 has a thickness direction perpendicular to the direction of the axis O with its upper surface 12 A connected to the upper surface 11 A of the cutting tool body 11 via an inclined surface 11 B. Since it protrudes upward (in the vertical direction in FIGS. 1 and 3), it is thicker than the rear end portion of the tool body 11.

, Further, from the front end face 13 of the cutting tool body 1 1 to the rear end side in the direction of the axis O, in a direction substantially parallel to the upper and lower surfaces of the cutting tool body 11, a slit 1 4 is formed until the position close to the above-mentioned inclined surface 11 B Is cut so that the tip 12 of the cutting tool body 11 is positioned at the upper tip 15 A located above the slit 14 and the lower tip located below the slit 14. The tip is divided into 15B and 2B.

Of the upper end 15A and the lower end 15B, the upper end 15A is cut until the slit 14 is close to the inclined surface 11B of the cutting tool body 11. As a result, the base portion on the rear end side becomes thinner, and the thinned portion can be elastically deformed in a direction approaching the lower end portion 15B with the fulcrum as a fulcrum. The tip end surface 13 of the cutting tool body 11 corresponding to the lower end portion 15 B is provided with an axis O from one end side in the width direction (the lower side in FIG. 2 and the right side in FIG. 3). A substantially flat plate-like projection 16 is formed so as to protrude toward the front end of the cutting tool, while the tip surface 13 of the cutting tool body 11 corresponding to the upper end 15A has one end in the width direction. An arm-shaped protruding portion 17 protruding from the side portion toward the front end side in the direction of the axis 〇 is formed so as to extend to an upper side of the above-mentioned substantially flat plate-shaped protruding portion 16. Since the arm-shaped protrusion 17 is formed so as to extend to the upper side of the substantially plate-shaped protrusion 16, the lower surface 17 A of the arm-shaped protrusion 17 is The upper surface 16A of the substantially plate-shaped protrusion 16 is arranged to face the predetermined distance from the upper surface 16A, and the lower surface 17A of the arm-shaped protrusion 17 is located The upper surface 16 A of the substantially flat protruding portion 16 serves as the second chip restraining surface 32 in the chip mounting seat 30.

Also, one end in the width direction of the tip end surface 13 of the cutting tool body 11 is located at the rear end side of the gap located between the first chip restriction surface 31 and the second chip restriction surface 32 in the direction of the axis 〇. The wall portion 33 is formed so as to be recessed and to be recessed one step from the one end portion of the distal end surface 13 to the rear end side in the axis O direction so as to face the distal end side in the axis O direction. That is, a tip comprising a pair of tip restraining surfaces 31, 32 arranged opposite to each other on the tip end portion 12 of the cutting tool body 11, and a wall surface 33 facing the tip side in the direction of the axis 〇. The mounting seat 30 is formed.

The first chip restraining surface 31 of the chip mounting seat 30 is formed on the arm-shaped projection 17 projecting from the upper end 15A, and the second chip restraining surface 31 of the chip mounting seat 30 is formed. The chip constraining surface 32 is formed on a substantially plate-shaped protrusion 16 protruding from the lower protrusion 15B, and the upper end 15A is connected to the lower end 15B. Therefore, the first chip constraint surface 31 is also elastically deformable in a direction approaching the second chip constraint surface 32.

A plurality of grooves 4 1… and ridges 4 2… extending along the axis O direction (in a direction parallel to the axis O direction) are formed on the first chip constraint surface 31 in the chip mounting seat 30. Serrations 40 alternately arranged are formed.

Also, a plurality of grooves 41 extending along the direction of the axis O (in a direction parallel to the direction of the axis と) intersect with the ridges 42 on the second chip restraining surface 32 of the chip mounting seat 30. Serrations 40 which are arranged mutually are formed.

Here, consider the case where the serration 40 formed on the first chip constraint surface 31 is viewed in a cross section orthogonal to the axis O direction, but viewed from the tip side in the axis O direction instead of the cross-sectional view. This will be described with reference to FIG.

When viewed in a cross section orthogonal to the axis 0 direction, a plurality of The grooves 41 are substantially identical in shape, so that the depths of these grooves are maintained substantially constant, and the plurality of grooves 41 are substantially identical in shape. However, these mountain heights are maintained substantially constant with each other.

Also, the pitch of the selection 40 is maintained substantially constant over substantially the entire length in the width direction (the left-right direction in FIG. 7), that is, the bottoms 41 A, 4 of the adjacent grooves 41, 41. The distance in the width direction between 1 A is kept almost constant (The distance in the width direction between the tops 42 A and 42 A of the adjacent peaks 42 and 42 is kept almost constant Yes) Further, the selection 40 formed on the first chip constraint surface 31 is symmetrical with respect to the widthwise central portion of the first chip constraint surface 31, that is, the first chip. It is formed symmetrically with respect to a line X connecting the central portion in the width direction of the chip constraint surface 31 and the central portion in the width direction of the second chip constraint surface 32.

Here, if a more detailed description of the plurality of grooves 41 and the ridges 42 constituting the selection 40 is to be described in more detail, each of the grooves 41 and the ridges 42 is described as follows. It is composed of two flat side walls 43, 43, respectively, and the recess formed by the intersection of two side walls 43, 43 adjacent in the width direction becomes the groove 41, The protrusion formed by the intersection of the two side wall surfaces 4 3, 4 3 adjacent in the direction is the peak 42.

For each of the grooves 41, 41 located at both ends in the width direction, of the two side walls 43, 43 constituting the grooves, the side wall surfaces 43, located at both ends in the width direction, are formed. Constitute half of the mountain 42.

Also, the inclination angle between each of the flat side walls 4 3, which constitute the plurality of grooves 4 1, and the ridges 4 2, and the straight line X (the narrow angle formed by the side wall surface 4 3, and the straight line X) ) Indicates that, although the side walls 43 adjacent in the width direction have different inclination directions, all side walls 43 are set to be substantially the same (the absolute value of the inclination angle is It is set to be almost the same).

Further, the bottom 41 A of the groove 41 forming the intersection of the two side walls 43, 43 is formed by a flat surface extending in a direction orthogonal to the straight line X (even a curved surface that is smoothly curved). And the top portion 4 2 A of the peak portion 42 forming the intersection of the two side walls 4 3, 4 3 is also flat extending in the direction perpendicular to the straight line X. It is composed of surfaces (which may be smoothly curved surfaces).

The above-mentioned groove depth and peak height are determined by the above-mentioned flat surface forming the bottom 41 A of the groove 41 and the flat surface forming the top 42 A of the peak 42 adjacent to the groove 41. Refers to the distance in the straight X direction.

On the other hand, when the serration 40 formed on the second chip restraining surface 32 is viewed in a cross section orthogonal to the direction of the axis 〇, as can be understood from FIG. 7, the serration 40 is formed on the first chip restraining surface 31. It has almost the same shape as the selected selection 40.

The chip 50 mounted on the chip mounting seat 30 as described above has a substantially rectangular parallelepiped shape as shown in FIGS. 4 to 6, and the upper surface 51 opposing the lower surface 52. Is perpendicular to the longitudinal direction P of the ridge line at one end (the left side in FIGS. 4 and 5) and the other end (the right side in FIGS. 4 and 5) of the chip 50 in the longitudinal direction P. Cutting edges 53, 54 extending in the longitudinal direction are formed respectively, and the ridges at both ends in the width direction (vertical direction in FIG. 5) at one end and the other end in the longitudinal direction P of the chip 50 are cut. A pair of transverse cutting edges 53A, 53A and a pair of transverse cutting edges 54A, 54A are formed on each of the blades 53, 54 so as to intersect each other via a part of the corner.

The end faces 55, 56 connected to the cutting edges 53, 54 and facing one end and the other end in the longitudinal direction P are flank surfaces of the cutting edges 53, 54, and are provided on the lower surface 52 side. The tip 50 is inclined toward the center in the longitudinal direction P of the tip 50 to give a positive clearance angle, and the transverse cutting edges 53 A, 53 A and 54 A, The side facing the both ends in the width direction following the 54 A is the flank of the transverse cutting edges 53 A, 53 A and 54 A, 54 A. The tip 50 is inclined so as to move toward the center in the width direction of the chip 50, so that a positive clearance angle is given. On the upper surface 51 of the insert 50, rake the cutting edges 53, 54 and the transverse cutting edges 53A, 53A, 54A, 54A at both ends in the longitudinal direction P, respectively. Surfaces 57 and 58 are formed, and a central portion 51A of the upper surface 51 connecting the rake surfaces 57 and 58 is provided along the longitudinal direction P (in a direction parallel to the longitudinal direction P). A serration 60 is formed by alternately arranging a plurality of extending grooves 61 and ridges 62. Also, on the lower surface 52 of the chip 50, a plurality of grooves 61 extending along the longitudinal direction P (in a direction parallel to the longitudinal direction P) and peaks 62 are alternately arranged. One part 60 is formed.

Here, consider the case where the serration 60 formed in the central portion 51A of the upper surface 51 is viewed in a cross section orthogonal to the longitudinal direction P. Instead of the cross-sectional view, the longitudinal direction P (axial line The description will be made with reference to FIGS. 6 and 7 when viewed from the tip side (〇 direction).

When viewed in a cross section orthogonal to the longitudinal direction P (the direction of the axis O), the plurality of grooves 61 forming the serration 60 have substantially the same shape, so that the depths of these grooves are substantially constant. Are maintained and the heights of the ridges 62 are maintained substantially constant by making the ridges 62 have substantially the same shape. Also, the pitch of the serration 60 is maintained substantially constant over substantially the entire length in the width direction (the left-right direction in FIGS. 6 and 7), that is, the bottom 61A of the adjacent grooves 61, 61, The distance in the width direction between 61 A is maintained almost constant (The distance in the width direction between the tops 62 A and 62 A of adjacent peaks 62 and 62 is maintained substantially constant ing) .

Furthermore, the serration 60 formed in the central portion 51A of the upper surface 51 is symmetrical with respect to the widthwise central portion of the upper surface 51 (central portion 51A). It is formed symmetrically with respect to a straight line Y connecting the center in the width direction of 51 (central portion 51 A) and the center of the lower surface 52 in the width direction.

Here, if a more detailed description is given of the plurality of grooves 6 1... And the ridges 6 2, which constitute the serration 60, the grooves 6 1, and the ridges 6 2. Each of the two flat side walls 6 3, 6 3 is composed of two flat side walls 6 3, 6 3, and a recess formed by the intersection of two adjacent side walls 6 3, 6 3 in the width direction becomes a groove 6 1. The convex portion formed by the intersection of two side wall surfaces 6 3, 6 3 adjacent in the direction is a mountain portion 62.

For each of the ridges 62, 62 located at both ends in the width direction, of the two side walls 63, 63 constituting the ridges 62, 62, the side wall surfaces located at both ends in the width direction are formed. 3 constitutes a half groove 6 1. Further, the inclination angle between each of the flat side walls 6 3, which constitute the plurality of grooves 6 1 and the peaks 6 2, and the straight line Y is determined by the side walls 6 3, 6 adjacent in the width direction. Although the inclination directions of the three members are different from each other, they are set to be substantially the same for all the side walls 63 (the absolute values of the inclination angles are set to be substantially the same).

Furthermore, the bottom 61A of the groove 61, which forms the intersection of the two side walls 63, 63, is formed by a smoothly curved curved surface (even a flat surface extending in a direction perpendicular to the straight line X). The top 6 2 A of the peak 6 2 which forms the intersection of the two side walls 6 3, 6 3 is a flat surface extending in the direction orthogonal to the straight line X. It is composed of surfaces (which may be smoothly curved surfaces).

The above groove depth and peak height are determined by the straight line between the curved surface forming the bottom 61A of the groove 61 and the flat surface forming the top 62A of the peak 62 adjacent to the groove 61. Refers to the distance in the X direction.

On the other hand, when the serration 60 formed on the lower surface 52 is viewed in a cross section orthogonal to the direction of the axis 0, as can be understood from FIGS. 6 and 7, the serration 60 corresponds to the central portion 51A of the upper surface 51. It has substantially the same shape as the formed selection 60.

In the chip 50 having such a configuration, the longitudinal direction P is parallel to the axis O direction of the byte body 11, and the end face 55 facing one end in the longitudinal direction P is the tip of the axis 〇 direction. Is attached to the tip mounting seat 30 formed on the tip end 12 of the byte body 11 so as to face the side, and the cut formed at one end ridge line in the longitudinal direction P on the upper surface 51. The blade 53 is made to protrude from the substantially flat protruding portion 16 of the cutting tool body 11 to the tip end side in the direction of the axis O.

At this time, the central portion 51A of the upper surface 51 of the chip 50 is disposed so as to face the first chip restraining surface 31 of the chip mounting seat 30 and is brought into contact with each other, so that the lower surface 51 of the chip 50 Are arranged so as to face the second chip restraining surface 32 of the chip mounting seat 30 and are brought into contact with each other. Further, the other end of the chip 50 in the longitudinal direction P (the rear end in the direction of the axis O) is connected to the other end. The facing end surface 56 is arranged to face the wall surface 33 facing the tip end side in the direction of the axis の of the chip mounting seat 30 and is in contact with each other.

The first chip restraining surface 31 of the chip mounting seat 30 and the central portion 51 A of the upper surface 51 of the chip 50 have a plurality of grooves 4 1,. ... and mountains Since the selections 40 and 60 are formed by alternately arranging the parts 4 2..., 6 2, the first chip restraining surface 31 and the upper surface 51 of the chip 50 are formed. As shown in FIG. 7, the contact surface formed when the central portion 51 A of the two contacts each other forms a corrugated shape in which the serrations 40 and 60 are interlocked.

Further, the second chip restraining surface 32 of the chip mounting seat 30 and the lower surface 52 of the chip 50 have a plurality of grooves 4 1..., 6 1. ., 62 are alternately arranged, so that the second chip restraining surface 32 and the lower surface 52 of the chip 50 are mutually connected. As shown in Fig. 7, the contact surface formed by contacting each other also has a wave shape in which the selections 40 and 60 are interdigitated.

In this state, when viewed in a cross section orthogonal to the direction of the axis O, the center in the width direction of the first chip restraining surface 31 in the chip mounting seat 30 is connected to the center in the width direction of the second chip restraining surface. The straight line X and the straight line Y connecting the widthwise central portion of the upper surface 51 (center portion 51A) of the chip 50 and the widthwise central portion of the lower surface 52 are matched. Then, the lower end 1 of the tip body 1 1 of the cutting tool body 11 is inserted so that the clamp port 18 as a clamping means passes through the upper end 15 A of the tip 12 of the cutting tool body 11. The head 18A of this clamp port 18 is fitted into the step 20 formed at the upper end 15A, and is screwed into the female thread 19 formed at 5B. 20 is pressed.

As a result, the upper end portion 15A is elastically deformed in a direction approaching the lower end portion 15B, and is formed into an arm-shaped projection 17 projecting from the upper end portion 15A. The first chip constraining surface 31 is also elastically deformed in a direction approaching the second chip constraining surface 32 formed on the substantially flat protrusion 16 protruding from the lower protrusion 15B.

That is, since the first chip restraining surface 31 and the second chip restraining surface 32 of the chip mounting seat 30 are brought close to each other by the clamp port 18 as a clamping means, 3 1 and the second chip restraining surface 32 press and fix the central portion 51 A of the upper surface 51 of the chip 50 and the lower surface 52, and the chip 50 is mounted on the chip mounting seat 30. It has been fixed. The grooving tool 10 on which the chip 50 is mounted in this way is formed on one end side ridge line in the longitudinal direction P on the upper surface 51 of the chip 50, and the substantially flat projecting portion of the tool body 11 is formed. With the cutting edge 53 protruding from the end 6 in the direction of the axis 〇 in the direction of the axis 溝, grooving or parting-off cutting is performed on the outer periphery of the work rotated around the axis.

In the grooving tool 10 according to the first embodiment, when the chip 50 is mounted and fixed on the chip mounting seat 30, the first chip restraining surface 31 and the second chip restraining surface of the chip mounting seat 30. A plurality of grooves 4 extending along the direction of the axis が form a contact surface formed by contact between the central portion 51 of the upper surface 51 and the lower surface 52 of the upper surface 51 of the chip 50. , 61, ... and peaks 42, ..., 62 are alternately arranged in a wave shape in which selections 40, 60 are combined.

As a result, the contact area can be greatly increased as compared with the conventional V-shaped contact surface, and the mounting rigidity of the chip 50 can be increased. The tip 50 mounted on the tip mounting seat 30 is a transverse cutting edge connected via a corner to a cutting edge 53 protruding from the cutting tool body 11 toward the tip side in the direction of the axis O. Since it has 53 A and 53 A, it is not only when feeding to the tip side in the axis 〇 direction is applied, such as in the above-mentioned grooving and parting-off cutting, but also crosses in the axis 〇 direction. Even when the lateral feed is given, the cutting can be performed by causing the horizontal cutting blades 53 A and 53 A to act on the work.

At this time, the plurality of grooves 41 1, 61, and the ridges 42, 62, constituting the above-mentioned serration structure extend along the axis 〇. Therefore, it is possible to reliably suppress the displacement of the chip 50 even when a cutting load is applied in a lateral direction intersecting with the axis O direction.

Further, when viewed in a cross section orthogonal to the direction of the axis O, the selections 40, 40 formed on the first chip restraining surface 31 and the second chip restraining surface 32 of the chip mounting seat 30 are in the width direction. It is symmetrical with respect to the central part, and the serrations 60, 60 formed on the central part 51A of the upper surface 51 and the lower surface 52 of the chip 50 are symmetrical with respect to the central part in the width direction. It has been.

Therefore, when cutting the workpiece, the longitudinal direction P on the upper surface 51 of the chip 50 If the cutting edge 53 (and the horizontal cutting edge 53 A, 53 A) formed on the ridge line on one end side of the tip is worn, the tip 50 is moved to the end face 5 facing the other end side in the longitudinal direction P. The cutting edge 5 4 (and the horizontal cutting edges 54 A, 54 A) formed on the other end of the upper surface 51 in the longitudinal direction P is oriented to the tip side in the direction of the axis を. By re-mounting the chip 50 so that it protrudes from the substantially flat plate-shaped projection 16 toward the tip end in the direction of the axis 0, the chip 50 can be used twice and effective use of the chip 50 can be achieved. The position of the cutting blades 53, 54 in the state does not change.

By the way, in the grooving tool 10 according to the first embodiment described above, the plurality of grooves 4 1,..., 6 1,. 2 "', 62") have the same shape, and the serrations 40, 40 (60) formed on the pair of chip constraining surfaces 31, 32 (the upper and lower surfaces 51, 52 of the chip) respectively. , 60 0) have the same pitch, so that the groove 4 1 (groove 6 1) and the peak 6 1 to be engaged

Even if there is some deviation from the (mountain portion 4 2), the chip 50 can be inserted into the chip mounting seat 30, and the upper and lower surfaces 51, 52 of the chip 50 can be connected to a pair of chip restraining surfaces. Since it can be pressed and fixed by 31 and 32, there is a possibility that the position of the cutting edge 53 (54) may be displaced in a state where the tip 50 is incorrectly inserted.

In order to solve this, when viewed in a cross section orthogonal to the direction of the axis に対して, the pair of chip restraining surfaces 3 1, 3 2 For at least one of the formed selections 40, 40, the shape of at least one groove 41 and the shape of the other grooves 41 are different from each other.

(The shape of at least one peak 42 and the shape of the other peaks 42 are different from each other), or the pitch of the serration 0 formed on one of the pair of chip constraint surfaces 31, 32. And by making the pitch of the serrations 40 formed on the other side different from each other, it is possible to insert the chip 50 only at a correct position, thereby eliminating the possibility of the chip being erroneously inserted. Is preferred.

Hereinafter, the grooving tool 10 according to the second to 20th embodiments of the present invention, which employs a configuration capable of preventing erroneous insertion of the chip 50, will be specifically described. The same parts as those in the embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the second and third embodiments of the present invention, when viewed in a cross section orthogonal to the axis 軸 direction, As can be understood from FIGS. 8 and 9, which are views when viewed from the tip side in the direction of the axis O, in the selection 40 formed on the first chip restraining surface 31, the width direction (see FIG. And the left and right direction in FIG. 9) One ridge 42 located at the center is formed to be slightly larger than the other ridges 42 and one ridge located at the center in the width direction. The peak height of 42 is larger than the peak height of the other peaks 42 ... Then, a selection 60 corresponding to the serration 40 formed on the first chip constraining surface 31 is formed on the central portion 51A of the upper surface 51 of the chip 50. I have.

More specifically, in the second embodiment, in the width direction between the tops 42A and 42A of the adjacent peaks 42 and 42 in the serration 40 formed on the first chip constraint surface 31. Is set to a substantially constant value P for all cases, and is substantially the same as the serration 40 formed on the second chip constraint surface 32.

Further, the distance in the width direction of the flat surface formed by the bottoms 4 1 A of the grooves 41 in the serration 40 formed on the first chip restraining surface 31 is one peak located at the center in the width direction. At the bottoms 41 A, 41 A of the grooves 41, 41 adjacent to 42, they are set to L and set to be substantially the same as the serrations 40 formed on the second chip constraint surface 32. In addition, other than these, it is set to L1 and set to be larger than the serration 40 formed on the second chip constraint surface 32.

On the other hand, in the third embodiment, the distance in the width direction of the flat surface formed by the bottom portions 41 A of the grooves 41 in the selection 40 formed on the first chip constraint surface 31 is all Is set to a substantially constant L, and is substantially the same as the cell 40 formed on the second chip constraint surface 32.

Also, the distance in the width direction between the tops 42A, 42A of the adjacent peaks 42, 42 in the selection 40 formed on the first chip constraint surface 31 is the widthwise center. Is set to P between one of the peaks 42 located adjacent to each other and the peaks 42 and 42 adjacent thereto, and the selection 40 formed on the second chip restraining surface 32 is set to P. In addition to the above, it is set to P1 and set to be smaller than the serration 40 formed on the second chip constraint surface 32 except for these.

In the fourth and fifth embodiments of the present invention, when viewed in a cross section orthogonal to the axis 軸 direction, As can be understood from FIGS. 10 and 11, which are views when viewed from the tip side in the direction of the axis 〇, the serration 40 formed on the first chip constraining surface 31 has its width direction (FIG. 1). 0 and Fig. 1 1) One ridge 42 located at the center is formed so as to be slightly smaller than the other ridges 42 and one located at the center in the width direction. The height of the mountain 42 is smaller than the height of the other mountain 42.

Then, a serration 60 corresponding to the serration 40 formed on the first chip constraint surface 31 is formed in the central portion 51A of the upper surface 51 of the chip 50.

More specifically, in the fourth embodiment, in the width direction between the tops 42 A, 42 A of the adjacent peaks 42, 42 in the serration 40 formed on the first chip constraint surface 31. Is set to a substantially constant value P for all cases, and is substantially the same as the serration 40 formed on the second chip constraint surface 32.

Also, the distance in the width direction of the flat surface formed by the bottoms 41 A of the grooves 41 in the selection 40 formed on the first chip constraint surface 31 is one of the distances in the width direction center. At the bottoms 41, 18 and 41A of the grooves 41, 41 adjacent to the peaks 42, L1 is set to be larger than the selection 40 formed on the second chip constraint surface 32. In addition to these, they are set to L and set to be substantially the same as the selection 40 formed on the second chip constraint surface 32 except for these.

On the other hand, in the fifth embodiment, the distance in the width direction of the flat surface formed by the bottoms 41 A of the grooves 41 in the selection 40 formed on the first chip constraint surface 31 is all Is set to a substantially constant L, and is substantially the same as the serration 40 formed on the second chip constraint surface 32.

Also, the distance in the width direction between the tops 42A, 42A of the adjacent peaks 42, 42 in the selection 40 formed on the first chip constraint surface 31 is the widthwise center. Is set at P 1 between one peak 42 located adjacent to the peak 42 and the peaks 42 adjacent to the peak 42, and the selection 40 formed on the second chip constraint surface 32 is set to P 1. In addition to the above, it is set to P and set to be substantially the same as the serration 40 formed on the second chip constraint surface 32 except for these. In the sixth and seventh embodiments of the present invention, it can be understood from FIGS. 12 and 13 which are views when viewed from the tip side in the direction of the axis ときに when viewed in a cross section orthogonal to the direction of the axis O. In addition, in the selection 40 formed on the first chip restraining surface 31, one groove 41 located at the center in the width direction (the left-right direction in FIGS. 12 and 13) corresponds to the other groove 4. The groove depth of one groove 41 located at the center in the width direction is larger than the groove depth of the other grooves 41.

Then, a selection 60 corresponding to the selection 40 formed on the first chip constraining surface 31 is formed on the central portion 51A of the upper surface 51 of the chip 50. Have been.

More specifically, in the sixth embodiment, the width between the tops 4 2 A and 42 A of the adjacent peaks 42 and 42 in the cell 40 formed on the first chip constraint surface 31. The distance in the direction is set to P1 between the peaks 42, 42 adjacent to one groove 41 located at the center in the width direction, and is formed on the second chip restraining surface 32. In addition to the above, it is set to be larger than the serration 40, and other than that, it is set to P and set to be substantially the same as the selection 40 formed on the second chip constraint surface 32. The distance in the width direction of the flat surface formed by the bottoms 4 1 A of the grooves 4 1 in the serration 40 formed on the first chip restraining surface 31 is equal to that of one groove 41 located at the center in the width direction. At the top 41A, it is set to L1 and is set to be larger than the serration 40 formed on the second chip constraint surface 32. Moni, in addition to this, set L, and is approximately set to the same as the second Sereshiyon 4 0 formed on the chip restraining surface 3 2.

On the other hand, in the seventh embodiment, the distance in the width direction of the flat surface formed by the bottoms 41 A of the grooves 41 in the serration 40 formed on the first chip constraint surface 31 is substantially the same. It is set to a constant L and is substantially the same as the cell 40 formed on the second chip constraint surface 32.

Also, the distance in the width direction between the tops 42A and 42A of the adjacent peaks 42 and 42 in the serration 40 formed on the first chip constraint surface 31 is located at the center in the width direction. Between the peaks 4 2, 4 2 adjacent to one groove 41, it is set to P 1 and set to be larger than the serration 40 formed on the second chip restraining surface 32. Otherwise, it is set to P and set to be substantially the same as the selection 40 formed on the second chip constraint surface 32.

In the eighth and ninth embodiments of the present invention, it can be understood from FIGS. 14 and 15 which are views when viewed from the tip side in the direction of the axis O when viewed in a cross section orthogonal to the direction of the axis 0. In addition, in the selection 40 formed on the first chip constraining surface 31, one groove 41 located at the center in the width direction (the left-right direction in FIGS. 14 and 15) corresponds to the other groove 4. The groove depth of one groove 41 located at the center in the width direction is smaller than the groove depth of the other grooves 41.

More specifically, in the eighth embodiment, in the width direction between the tops 42 A and 42 A of the adjacent peaks 42 and 42 in the serration 40 formed on the first chip constraint surface 31. The distance between the peaks 42 and 42 adjacent to one groove 41 located at the center in the width direction is set to P 1 and the distance formed on the second chip restraining surface 32 is set to P 1. In addition to this, it is set to be smaller than the section 40, and in other cases, it is set to P and is set to be substantially the same as the selection 40 formed on the second chip constraint surface 32. The distance in the width direction of the flat surface formed by the bottoms 4 1 A of the grooves 4 1 in the serration 40 formed on the first chip restraining surface 31 is equal to that of one groove 41 located at the center in the width direction. At the top 41 A, it is set to L and is set to be substantially the same as the selection 40 formed on the second chip constraint surface 32. In addition to this, it is set to L 1, is greatly set than selenides one Chillon 4 0 formed on the second chip restraining surface 3 2.

On the other hand, in the ninth embodiment, the distance in the width direction of the flat surface formed by the bottoms 41 A of the grooves 41 in the selection 40 formed on the first chip constraint surface 31 is: All of them are set to a substantially constant L, and are almost the same as the serrations 40 formed on the second chip constraint surface 32.

Also, the distance in the width direction between the tops 42A, 42A of the adjacent peaks 42, 42 in the serration 40 formed on the first chip constraint surface 31 is located at the center in the width direction. Between the peaks 4 2, 42 adjacent to one groove 41, which is set to P 1 and smaller than the serration 40 formed on the second chip constraint surface 32. Otherwise, it is set to P and set to be substantially the same as the selection 40 formed on the second chip constraint surface 32.

In the tenth and eleventh embodiments of the present invention, it is understood from FIGS. 16 and 17 which are views when viewed from the tip side in the direction of the axis O when viewed in a cross section orthogonal to the direction of the axis 〇. As can be seen, in the serration 40 formed on the first chip constraining surface 31, one peak portion 42 located in the center in the width direction (the left-right direction in FIGS. 16 and 17) is the other. Is formed so as to be slightly larger (smaller) than the peaks 4 2… of the other peaks 4 2… located at the center in the width direction. Although it is larger (smaller), unlike the first to ninth embodiments described above, the serrations 40 formed on the first chip constraining surface 31 and the second chip constraining surface 3 ′ 2 are different from the first embodiment. , 40 are two grooves 41, 41 and three peaks 42, respectively (half peaks 42, 42 located at both ends in the width direction). (Including two).

Then, a serration 60 corresponding to the selection 40 formed on the first chip constraint surface 31 is formed in the central portion 51 A of the upper surface 51 of the chip 50. I have.

More specifically, in the tenth embodiment, the width between the tops 42 A, 42 A of the adjacent peaks 42, 42 in the selection 40 formed on the first chip constraint surface 31. The distance in the direction is set to a substantially constant P for all (two), and is substantially the same as the serration 40 formed on the second chip constraint surface 32.

Further, the distance in the width direction of the flat surface formed by the bottoms 41A of the grooves 41 in the serration 40 formed on the first chip constraint surface 31 is set to L for all (two). Approximately the same as the selection 40 formed on the second chip constraint surface 32 Is set to

On the other hand, in the first embodiment, in the width direction between the tops 42A and 42A of the adjacent peaks 42 and 42 in the serration 40 formed on the first chip constraint surface 31. The distance is set to a substantially constant P for all (two), and is substantially the same as the selection 40 formed on the second chip constraint surface 32.

Further, the distance in the width direction of the flat surface formed by the bottoms 4 1 A of the grooves 41 in the serration 40 formed on the first chip restraining surface 31 is one peak located at the center in the width direction. At the bottoms 41 A, 41 A of the grooves 4 1, 41 adjacent to 42, all (two) are set to L 1 and the serrations 4 formed on the second chip constraint surface 32 are set. It is set larger than 0.

In the 12th to 14th embodiments of the present invention, when viewed in a cross section orthogonal to the axis O direction, it is understood from FIGS. 18 to 20 which are views when viewed from the tip side in the axis O direction. In order to make it possible, in the serration 40 formed on the first chip constraining surface 31, the half peaks 42, 42 located at both ends in the width direction (left and right directions in FIGS. 18 to 20) are formed. Side wall surface 4 3 that constitutes each of them (located at both ends in the width direction of side wall surfaces 4 3 and 4 3 that constitute each of grooves 41 and 41 located at both ends in the width direction) The inclination angle between the side wall surface 43) and the above-mentioned straight line X is different from that of the other side wall surface 43 ~ (and the groove 41 of the selection 40 formed on the second chip restraining surface 32) and the mountain. Each of the side walls 4 3. That 2 Tsunoyama section 4 2 of the mountain height, are smaller summer than other mountain section 4 2 ... mountain height of.

More specifically, in the 12th embodiment, the serrations 40, 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32, respectively, have peaks 4 at the center in the width direction. In the thirteenth embodiment, the selections 40, 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32 are respectively located at the center portions in the width direction. The groove 41 is located at On the other hand, in the 14th embodiment, the serrations 40 and 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32 respectively have a peak 42 in the center in the width direction. Although they are positioned, unlike the first and second embodiments described above, the selections 40 and 40 formed on the first chip constraint surface 31 and the second chip constraint surface 32 are different from the first and second embodiments. 40 is composed of a small number of two grooves 4 1, 4 1 and three peaks 4 2... (Including two half peaks 4 2, 4 2 located at both ends in the width direction). It has been done.

In the fifteenth to seventeenth embodiments of the present invention, when viewed in a cross section orthogonal to the axis 図 direction, it is understood from FIGS. 21 to 23 which are views when viewed from the tip side in the axis 〇 direction. As can be seen, in the selection 40 formed on the first chip constraining surface 31, one peak portion 4 2 (groove) located at the center in the width direction (left-right direction in FIGS. 21 to 23) The inclination angle between each of the side walls 4 3, 4 3 constituting the portion 4 1) and the straight line X is formed on the other side wall surface 4 3 — (and the second chip constraint surface 32). Each of the side walls 4 3-constituting the plurality of grooves 41 and the peaks 42 of the serration 40 is formed so as to be larger than the inclination angle between the straight line X and the central part in the width direction. The height of one peak 42 (groove depth of groove 41) is smaller than the height of other peaks 42 (groove depth of groove 41 ...) To have.

Then, a selection 60 corresponding to the serrations 40 formed on the first chip constraint surface 31 is formed on the central portion 51A of the upper surface 51 of the chip 50. I have.

More specifically, in the fifteenth embodiment, the serrations 40, 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32, respectively, have peaks 4 in the center in the width direction. 2 and the height of one peak 4 2 located at the center in the width direction of the selection 40 formed on the first chip restraint surface 31 is the same as the height of the other peaks 4 2. In the sixteenth embodiment, the serrations 40, 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32, respectively, are located at the center in the width direction. With the groove portion 41 positioned, the groove depth of one groove portion 41 located at the center in the width direction of the selection 40 formed on the first chip restraining surface 31 is the same as the groove depth of the other groove portions 4 1. It's getting smaller. On the other hand, in the seventeenth embodiment, the serrations 40, 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32, respectively, have the peaks 42 at the center in the width direction. As a result, the height of one peak 42 located at the center in the width direction of the selection 40 formed on the first chip constraint surface 31 is smaller than the height of the other peaks 42. However, unlike the above-described fifteenth and sixteenth embodiments, the serrations 40 and 40 formed on the first chip constraint surface 31 and the second chip constraint surface 32 are respectively 2 The book is composed of a small number of two grooves 41, 41 and three peaks 42 (including two half peaks 42, 42 located at both ends in the width direction). In the eighteenth to nineteenth embodiments of the invention, when viewed in a cross section orthogonal to the direction of the axis O, FIG. As can be understood from FIGS. 4 and 25, the selection 40 formed on the first chip restraining surface 31 is located at the center in the width direction (the horizontal direction in FIGS. 24 and 25). One groove 41 is formed so as to be wider than the other grooves 41. The groove width of one groove 41 located in the center in the width direction is the same as that of the other grooves 41. One ridge 42, which is larger than the width or located at the center in the width direction, is formed to be wider than the other ridges 42, and the center in the width direction is formed. The peak width of one peak 42 located in is larger than the peak width of the other peaks 42.

More specifically, in the eighteenth embodiment, one groove 41 located at the center in the width direction of the selection 40 formed on the first chip restraining surface 31 has a plurality of substantially identical shapes. A shape in which two adjacent grooves 41, 41 in a serration 40, in which the grooves 41 and a plurality of peaks 42 having the same shape are alternately arranged at a substantially constant pitch, are connected. It has become.

On the other hand, in the ninth embodiment, one peak 42 located at the center in the width direction of the serration 40 formed on the first chip constraint surface 31 has a plurality of grooves 4 of substantially the same shape. A plurality of ridges 4 2 ... of the same shape as 1 ... are alternately arranged at a substantially constant pitch. The shape is such that two adjacent peaks 42, 42 of the arrayed serrations 40 are connected.

In the second to nineteenth embodiments of the present invention as described above, when viewed in a cross section orthogonal to the direction of the axis 〇, the selection portions 4 formed on the pair of chip constraint surfaces 31 and 32 respectively. 0 (for example, the selection 40 formed on the first chip constraining surface 31), the shape of at least one groove 41 and the shape of the other grooves 41 are made different from each other (at least one The shape of the peak 42 is different from the shape of the other peaks 42.

For example, in the second to fifth and tenth to eleventh embodiments, one ridge 41 located at the center in the width direction of the selection 40 formed on the first chip constraint surface 31 is formed. In the sixth to ninth embodiments, one groove portion 42 located at the center in the width direction of the serration 40 formed on the first chip restraint surface 31 is slightly larger or smaller. However, in the 12th to 14th embodiments, the sides forming the two peaks 4 2, 4 2 located at both ends in the width direction of the selection 40 formed on the first chip constraint surface 31. The inclination angle between each of the wall surfaces 43 and 43 and the straight line X is increased, and in the fifteenth to seventeenth embodiments, the selection 40 formed on the first chip constraint surface 31 is reduced. The inclination angle between each of the side walls 4 3, 4 3 and the straight line X that constitutes one ridge portion 4 1 or groove portion 4 located at the center in the width direction In the eighteenth to nineteenth embodiments, the groove width or the peak part 42 of one groove part 41 located at the center in the width direction of the serration 40 formed on the first chip constraint surface 31 is set. Mountain width is increased.

As a result, when inserting the chip 50 into the chip mounting seat 30, the groove 41 of the serration 40 of the first chip restraining surface 31 to be engaged with each other and the chip 50 If at least one of the peaks 6 2 (grooves 6 1) of the serration 60 formed in the central portion 51 A of the upper surface 51 of the surface is displaced, these serrations 40 and 60 interfere with each other, Insertion of chip 50 is no longer possible.In other words, chip 50 cannot be inserted only in the correct position with respect to chip mounting seat 30, and chip 50 is incorrectly inserted. Is no longer likely to be No displacement of the blade 53 occurs.

Moreover, in common with the second to nineteenth embodiments, the serrations 40, 40 formed on the pair of chip constraint surfaces 31, 32, and the upper and lower surfaces 51, 52 of the chip 50 are formed. Since the formed serrations 60 and 60 are symmetrical with respect to the center in the width direction, respectively, even if the above-described configuration for preventing incorrect insertion of the chip 50 is adopted, The cutting edge 54 formed on the ridge line on the other end of the tip 50 can be remounted so that it protrudes from the cutting tool body 11 toward the tip end in the direction of the axis 0, and it can be used twice. You can do it.

In the twenty-first embodiment of the present invention, as can be understood from FIG. 26, which is a view when viewed from the tip side in the direction of the axis 、 when viewed in a section orthogonal to the direction of the axis 〇, the first chip The pitch P1 of the selection 40 formed on the constraint surface 31 and the pitch P of the serration 40 formed on the second chip constraint surface 32 are different from each other.

More specifically, in the 20th embodiment, the pitches 1 and P of the serrations 40 and 40 formed on the first chip constraining surface 31 and the second chip constraining surface 32 respectively correspond to the width direction (FIG. 2). (Left-right direction in FIG. 6), and is maintained substantially constant over substantially the entire length, and the relationship between these pitches PI and P is defined as P 1 <P and η Ρ 1 ≠ Ρ (n: integer). -ing

In the twenty-first embodiment of the present invention described above, when viewed in a cross section orthogonal to the direction of the axis O, the selection 40 formed on the pair of chip constraint surfaces 31 and 32 respectively. One pitch is different from the other pitch.For example, the pitch P1 of the serration 40 formed on the first chip constraint surface 31 is the second chip constraint. The pitch P is smaller than the pitch P of the serrations 40 formed on the surface 32.

As a result, when the chip 50 is inserted into the chip mounting seat 30, the groove 41 of the selection 40 of the first chip restraining surface 31 to be engaged with each other and the chip 5 are formed. Top surface of 0 5 Central part of 1 5 Serration formed on 1 A 6 Crest of 0 6 If any one of the grooves 2 (groove 6 1) is displaced, as shown by the two-dot chain line in FIG. 27, these selections 40 and 60 interfere with each other and insert the chip 50. You can no longer do it.

In other words, it is inevitable that the chip 50 can only be inserted at the correct position with respect to the chip mounting seat 30, and there is no possibility that the chip 50 will be incorrectly inserted. Such a thing does not occur.

Moreover, in the 20th embodiment, the upper and lower surfaces of the serrations 40, 40 formed on the pair of chip constraint surfaces 31, 32 and the chip 50 are similar to the second to 19th embodiments described above. The serrations 60, 60 formed in 51, 52 are symmetrical with respect to the center in the width direction, respectively. Even when the configuration is adopted, the cutting edge 54 formed on the other end side ridge of the tip 50 can be mounted again so as to protrude from the cutting tool main body 11 toward the tip end in the direction of the axis 〇. It can be reused.

In each of the above-described embodiments, the chip 50 is different from the cutting edge 53 (and the horizontal cutting edge 53 A, 53 A) formed on the upper surface 51 at the ridge line on one end side in the longitudinal direction P. It is described as having the cutting edge 54 (and the horizontal cutting edge 54 A, 54 A) formed on the end side ridge line, but is not limited to this. As in the twenty-first embodiment of the present invention shown in FIG. 30, the cutting edge 53 (and the horizontal cutting edge 53 A, 53 A) is formed only on the ridge line on one end side in the longitudinal direction P on the upper surface 51 of the chip 50. ) May be formed.

In the twenty-first embodiment of the present invention, the other edge of the other end in the longitudinal direction P on the upper surface 51 of the chip 50 is not a cutting edge, and the end face of the chip 50 facing the other end in the longitudinal direction P Reference numeral 56 denotes a flat surface substantially perpendicular to the longitudinal direction P.

In such a chip 50, the end face 56 facing the other end in the longitudinal direction P is arranged so as to face the wall surface 33 facing the tip side in the axis 〇 direction of the chip mounting seat 30. They are mounted on the chip mounting seat 30 so that they come into contact with each other. Industrial potential

The present invention mainly performs grooving on the outer periphery of a workpiece in turning, The present invention relates to a grooving tool used for performing parting-off cutting and a chip to be mounted on the grooving tool. According to the present invention, a pair of chip binding surfaces in a chip mounting seat and upper and lower surfaces of the chip are provided. The two contact surfaces formed by contacting each other form a wave-shaped contact surface in which serrations in which a plurality of grooves and peaks are alternately arranged are interlocked, and the contact area is reduced. This can increase the mounting rigidity of the chip.

Further, in the present invention, when viewed in a cross section orthogonal to the axial direction, at least one of the selections formed on each of the pair of chip constraint surfaces has a shape of at least one groove and a shape of another groove. Different from each other (or at least one of the ridges and the other ridges), or a pitch of the selection formed on one of the pair of chip restraining surfaces and the other. If the pitches of the selected selections are different from each other, measures are taken to prevent incorrect insertion of chips.

For this reason, if at least one of the grooves and peaks to be engaged with each other is displaced, it becomes impossible to insert the chip into the chip mounting seat, and the chip must be inserted only at the correct position. This prevents erroneous insertion of the insert and prevents the position of the cutting edge from shifting.

Claims

The scope of the claims

1. A tip mounting seat having a pair of mutually opposing tip restraining surfaces is formed at the tip of a cutting tool body extending along the axial direction, and the tip mounting seat has one end in the longitudinal direction on the upper surface. A throw-away chip having a cutting edge formed on a side ridge is mounted so that the cutting edge protrudes from the bit body toward the distal end in the axial direction, and the pair of chip restraining surfaces is clamped by clamping means. A grooved press for pressing and fixing the upper and lower surfaces of the thrower tip,

Serrations formed by alternately arranging a plurality of grooves and ridges extending along the axial direction are formed on the pair of chip constraint surfaces, respectively.

A grooving tool having serrations formed on upper and lower surfaces of the throw-away chip, respectively, so as to correspond to the shapes of the pair of chip-restricting surfaces.

2. The grooving tool according to claim 1,

When viewed in a cross section orthogonal to the axial direction,

At least one of the serrations respectively formed on the pair of chip restraining surfaces has a shape of at least one groove and a shape of another groove different from each other, or a shape of at least one crest and another shape. Grooving tools with different peak shapes.

3. The grooving tool according to claim 1,

When viewed in a cross section orthogonal to the axial direction,

A grooving byte in which the pitch of the selection formed on one of the pair of chip constraint surfaces and the pitch of the selection formed on the other are different from each other.

4. In the grooving tool according to claim 1,

When viewed in a cross section orthogonal to the axial direction,

The serrations respectively formed on the pair of chip restraining surfaces are grooved cutting tools which are symmetrical with respect to a width direction central portion.

5. The grooving tool according to claim 1,

The throw-away tip is also cut along the other edge in the longitudinal direction on the upper surface. Grooving bit with blade formed.

6. A mouth-away tip having a cutting edge formed at one longitudinal ridge on the upper surface facing the lower surface,

A throwaway chip having serrations formed by alternately arranging a plurality of grooves and ridges extending along the longitudinal direction on the upper and lower surfaces.

7. In the throwaway chip according to claim 6,

When viewed in a cross section orthogonal to the longitudinal direction,

At least one of the serrations respectively formed on the upper and lower surfaces has a shape of at least one groove and a shape of another groove different from each other, or a shape of at least one crest and another crest Slowway tips with different shapes.

8. The throwaway tip of claim 6, wherein:

When viewed in a cross section orthogonal to the longitudinal direction,

A throwaway chip in which a pitch of the selection formed on one of the upper and lower surfaces and a pitch of the serration formed on the other are different from each other.

9. The throwaway tip according to claim 6,

When viewed in a cross section orthogonal to the longitudinal direction,

The throwaway chips, wherein the serrations respectively formed on the pair of chip restraining surfaces are respectively symmetrical with respect to a width direction central portion.

10. The throwaway chip according to claim 6,

A throw-away tip in which a cutting edge is also formed on the other end side ridge line in the longitudinal direction on the upper surface.