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WO2013039090A1 - Insert d'usinage et outil d'usinage - Google Patents

Insert d'usinage et outil d'usinage Download PDF

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Publication number
WO2013039090A1
WO2013039090A1 PCT/JP2012/073287 JP2012073287W WO2013039090A1 WO 2013039090 A1 WO2013039090 A1 WO 2013039090A1 JP 2012073287 W JP2012073287 W JP 2012073287W WO 2013039090 A1 WO2013039090 A1 WO 2013039090A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
surface portion
insert
divided
cutting insert
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/073287
Other languages
English (en)
Japanese (ja)
Inventor
佐治　龍一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tungaloy Corp
Original Assignee
Tungaloy Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tungaloy Corp filed Critical Tungaloy Corp
Priority to JP2013533681A priority Critical patent/JP5835337B2/ja
Publication of WO2013039090A1 publication Critical patent/WO2013039090A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
    • B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts 
    • B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts  having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/085—Rake or top surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/12—Side or flank surfaces
    • B23C2200/125—Side or flank surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/16—Supporting or bottom surfaces
    • B23C2200/161—Supporting or bottom surfaces with projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/16—Fixation of inserts or cutting bits in the tool
    • B23C2210/168—Seats for cutting inserts, supports for replacable cutting bits

Definitions

  • the present invention relates to a cutting tool with replaceable cutting edge, and more particularly to a technique of a cutting insert and a tool body having high seating stability.
  • the cutting insert is detachably attached to the insert mounting seat by inserting a screw into the screw hole of the insert mounting seat of the tool body through the through hole of the cutting insert and tightening.
  • a cutting tool can employ various mechanisms for firmly fixing (clamping) the cutting insert to the insert mounting seat, for example, in order to improve the processing quality.
  • the cutting insert comes into contact with the insert mounting seat in a so-called one-sided state where the screw contacts only a part of the wall surface that defines the through hole of the cutting insert. Fixed. Therefore, in this mechanism, the cutting insert cannot be uniformly pressed against the bottom wall surface of the insert mounting seat, and there is room for improvement with respect to the seating stability of the cutting insert on the insert mounting seat.
  • the screw strongly presses a part of the wall surface that defines the through hole of the cutting insert, and in particular, a large bending moment can be applied to the screw from the cutting insert. This affects the life of the screw and may reduce the overall fixing performance of the cutting insert.
  • An object of the present invention is to provide a cutting insert and a cutting edge exchangeable cutting tool that enables a cutting insert to be firmly and stably fixed to an insert mounting seat of a tool body.
  • the present invention can provide a cutting insert and a cutting edge exchangeable cutting tool based on the following three technical ideas.
  • the first technical idea is that the cutting edge of the cutting insert has a rotationally symmetric shape with respect to the central axis of the through hole.
  • the second technical idea is that an end surface having a function as a seating surface of the cutting insert has a plurality of surfaces.
  • the third technical idea is that each of the plurality of surfaces is inclined with respect to a surface determined so that the central axes of the through holes are orthogonal to each other.
  • the cutting insert which concerns on 1 aspect of this invention is extended through the 1st end surface and the 2nd end surface on the opposite side substantially with respect to this 1st end surface,
  • the through-hole by which a center axis is defined, 1st A plurality of cutting edges arranged in a rotationally symmetrical manner with respect to the central axis at the intersecting ridge line portion between the end surface and the peripheral side surface extending between the first end surface and the second end surface;
  • a plurality of divided surface portions that are rotationally symmetrical with respect to each other, each divided surface portion being associated with one of the plurality of cutting edges, and a plane that is defined so that the central axis is orthogonal to each other
  • a plurality of dividing surface portions formed so as to have a predetermined inclination.
  • each of the divided surface portions is formed so as to be inclined toward the first end surface side as the distance from the central axis line increases on a plane that crosses the divided surface portion and includes the central axis line. More preferably, the plurality of dividing surface portions are formed to extend along each of a plurality of planes defined so as to intersect with each other at approximately one point on the central axis.
  • a blade-tip-exchangeable cutting tool includes a tool body having at least one insert mounting seat, and the above-described cutting insert is detachably mounted on the insert mounting seat.
  • the insert mounting seat of the cutting edge replaceable cutting tool includes a cutting edge that is enabled when the cutting insert is mounted on the insert mounting seat so that one of the plurality of cutting blades can be used.
  • a screw hole in which a hole axis extending so as to be parallel to the central axis of the through hole is defined.
  • FIG. 1 is a plan view of a cutting insert according to the first embodiment of the present invention.
  • FIG. 2 is a right side view of the cutting insert of FIG.
  • FIG. 3 is a rear view of the cutting insert of FIG.
  • FIG. 4 is a front view of the cutting insert of FIG.
  • FIG. 5 is a bottom view of the cutting sensor of FIG.
  • FIG. 6 is a perspective view of the cutting insert of FIG. 1 viewed obliquely from above.
  • FIG. 7 is a perspective view of the cutting insert of FIG. 1 as viewed obliquely from below.
  • FIG. 8 is a front view of the cutting edge-exchangeable cutting tool according to the first embodiment of the present invention.
  • FIG. 9 is a view of the cutting tool of FIG. 8 as viewed from the front end side.
  • FIG. 10 is a perspective view of the cutting tool of FIG.
  • FIG. 11 is a partially enlarged view of the cutting tool of FIG.
  • FIG. 12 is a partially enlarged view of the cutting tool of FIG. 13 is an assembly view of the insert mounting seat of the cutting tool of FIG.
  • FIG. 14 is an enlarged perspective view of an insert mounting seat to which the cutting insert is not attached in the cutting tool of FIG. 15 is an enlarged perspective view from another direction of the insert mounting seat of FIG. 14 in which the cutting insert is not attached in the cutting tool of FIG.
  • FIG. 16 is a partially enlarged cross-sectional view of one insert mounting seat on which one cutting insert is arranged and its surroundings in the cutting tool of FIG.
  • FIG. 17 is a plan view of a cutting insert according to the second embodiment of the present invention.
  • FIG. 18 is a right side view of the cutting insert of FIG. 19 is a rear view of the cutting insert of FIG. 20 is a bottom view of the cutting insert of FIG.
  • FIG. 21 is a perspective view of the cutting insert of FIG.
  • FIG. 22 is an enlarged view of a portion around the insert mounting seat to which the cutting insert of FIG. 17 is attached in the cutting edge-exchangeable cutting tool according to the second embodiment of the present invention.
  • FIG. 23 is a plan view of a cutting insert according to the third embodiment of the present invention.
  • FIG. 24 is a right side view of the cutting insert of FIG.
  • FIG. 25 is a rear view of the cutting insert of FIG.
  • FIG. 26 is a bottom view of the cutting insert of FIG.
  • FIG. 27 is a perspective view of the cutting insert of FIG. FIG.
  • FIG. 28 is a plan view of a cutting insert according to the fourth embodiment of the present invention.
  • FIG. 29 is a right side view of the cutting insert of FIG. 30 is a rear view of the cutting insert of FIG.
  • FIG. 31 is a bottom view of the cutting insert of FIG.
  • FIG. 32 is a perspective view of the cutting insert of FIG.
  • the cutting insert 1 of the first embodiment is shown in FIGS.
  • the cutting insert 1 has a substantially circular shape in plan view as shown in FIG.
  • the cutting insert 1 comprises two end faces 2, 3 that are substantially opposite, ie substantially opposite to each other, and a peripheral side face 4 extending between them.
  • a through hole 5 extending so as to penetrate these two end faces is formed, and a central axis A is defined in the through hole 5.
  • the cutting insert 1 has a shape that is 120 ° rotationally symmetric with respect to the central axis A.
  • one end surface (corresponding to the first end surface of the present invention) 2 of the two end surfaces is hereinafter referred to as an “upper surface”, and the other end surface of the two end surfaces (the present invention). 3) is hereinafter referred to as a “lower surface”.
  • the direction from the lower surface 3 to the upper surface 2 in the axis A direction is referred to as “upward”, and the direction from the upper surface 2 to the lower surface 3 in the axis A direction is referred to as “downward”.
  • the terms “above” and “below” are not intended to limit the present invention and are not intended to be construed in a limited manner based on these terms.
  • the upper surface 2 of the cutting insert 1 has three divided portions 2a, 2b and 2c having the same shape.
  • the three portions 2a, 2b, and 2c are divided surface portions of the upper surface 2, they are referred to as “divided upper surface portions”. And in order to distinguish them easily, here, they can be referred to as first to third divided upper surface portions.
  • segmentation upper surface parts 2a, 2b, and 2c are connected via the interposition part 2d, and are formed away with respect to each other.
  • the three divided upper surface portions may be continuous.
  • the first to third divided upper surface portions 2a, 2b, and 2c are arranged around the through hole 5 and are arranged to be 120 ° rotationally symmetric with respect to the central axis A of the through hole 5, and the upper surface 2 of the cutting insert 1 is The shape is rotationally symmetric with respect to the central axis A by 120 °.
  • each of the divided upper surface portions has a fan-shaped shape around the central axis A.
  • the divided upper surface portions 2a, 2b, and 2c are formed so as to extend along a single plane that is defined so as to correspond to each of the divided upper surface portions 2a, 2b, and 2c. It is configured as a flat surface.
  • Cutting edges are formed along the edges of each of the first to third divided upper surface portions 2a, 2b, and 2c, that is, the intersecting ridge line portion between each divided upper surface portion and the peripheral side surface 4.
  • the symbol “6a” is used for the first cutting edge formed at the edge portion of the first divided upper surface portion 2a
  • the symbol “6b” is used for the second cutting edge formed at the edge portion of the second divided upper surface portion 2b.
  • the symbol “6c” can be used for the third cutting edge formed at the edge of the third divided upper surface portion 2c.
  • the first divided upper surface portion 2a is not parallel to the plane F but is inclined so as to form a predetermined angle with the plane F.
  • the relationship between the first divided upper surface portion 2a and the plane F is similarly established between the other second and third divided upper surface portions 2b and 2c and the plane F, and will be described in detail later.
  • the first divided upper surface portion 2a is a plane that inclines toward the upper surface 2 side as it is away from the axis A on a plane that crosses the first divided upper surface portion 2a and includes the central axis A. Inclined with respect to F. Therefore, the portion on the central axis A side of the first divided upper surface portion 2a is positioned downward in the direction of the central axis A than the portion on the peripheral side surface 4 side of the first divided upper surface portion 2a. The same applies to the second divided upper surface portion 2b and the third divided upper surface portion 2c.
  • segmentation upper surface parts 2a, 2b, 2c are mutually related with respect to each other so that three planes defined so that they may extend may cross at one point on the central axis A in general. That is, these divided upper surface portions are formed so as to extend along each of three planes defined so as to intersect with each other at approximately one point on the central axis A. Therefore, the upper surface 2 extends so as to define a recess.
  • the inclination angle ⁇ a of the first divided upper surface portion 2a with respect to the plane F can be determined on a plane that is defined to cross the first divided upper surface portion 2a and include the central axis A.
  • the inclination angle ⁇ a is determined in a plane (hereinafter, referred to as “bisected plane”) that divides the first divided upper surface portion 2a into two equal parts where the angle is the largest.
  • the inclination angle ⁇ a of the first divided upper surface portion 2a with respect to the plane F corresponds to the angle in the cross section of the first divided upper surface portion 2a of the cutting insert 1 along the line ⁇ in FIG. 1 and can be represented in FIG. .
  • the angle ⁇ a is an acute angle and is greater than 0 ° and less than 90 °.
  • a surface (hereinafter referred to as an upper extension surface) that is defined to extend the first divided upper surface portion 2 a is less than 90 ° with respect to a plane F that is defined to be orthogonal to the central axis A of the through hole 5. Intersect at an angle of
  • Each of the second and third divided upper surface portions 2b and 2c is also divided into two equal parts so as to include the central axis A and to divide the divided upper surface portion into two equal parts.
  • inclination angles ⁇ b and ⁇ c with respect to the plane F can be determined.
  • the lower surface 3 of the cutting insert 1 also has three divided portions 3 a, 3 b, 3 c having the same shape as the upper surface 2.
  • the three portions 3a, 3b, and 3c are respectively divided surface portions of the lower surface 3, and hence are referred to as “divided lower surface portions”. And in order to distinguish them easily, here, they can be referred to as first to third divided lower surface portions.
  • the three divided lower surface portions 3 a, 3 b, and 3 c are connected via the interposition portion 3 d and are formed apart from each other.
  • the three divided lower surface portions may be continuous.
  • the first divided lower surface portion 3a has a corresponding relationship with the first divided upper surface portion 2a and the first cutting edge 6a, and when the divided upper surface portion 2a is slid parallel to the direction of the axis A, the first divided upper surface portion that has been slid It extends to overlap 2a.
  • the first divided lower surface portion 3a is located below the first divided upper surface portion 2a, particularly directly below.
  • the first divided upper surface portion 2a is located above the first divided lower surface portion 3a, particularly directly above.
  • the second divided lower surface portion 3b is in a corresponding relationship with the second divided upper surface portion 2b and the second cutting edge 6b, and is positioned downward, in particular, directly below the second divided upper surface portion 2b.
  • the third divided upper surface portion 2c and the third cutting edge 6c Corresponds to the third divided upper surface portion 2c and the third cutting edge 6c, and is positioned downward, in particular, directly below the third divided upper surface portion 2c.
  • Each of the first to third divided lower surface portions 3a, 3b, 3c is formed so as to extend along a single plane determined so as to correspond to each of them, and is configured as a particularly flat surface here. .
  • segmentation lower surface parts 3a, 3b, 3c are formed in parallel with the respectively corresponding division
  • the second divided lower surface portion 3b is inclined with respect to the plane F, and in the corresponding bisecting plane, the inclination angle ⁇ b is formed with respect to the plane F, and the third divided lower surface portion 3c is with respect to the plane F.
  • the inclination angle ⁇ c is formed with respect to the plane F in the corresponding bisected plane. Therefore, the planes defined so as to extend the divided lower surface portions 3a, 3b, and 3c (hereinafter referred to as “lower extended surfaces”) intersect the plane F at an angle of less than 90 °.
  • the inclination angle of the divided lower surface portion with respect to the plane F is also that of the corresponding divided upper surface portion among the planes that are defined so as to cross the divided lower surface portion and include the central axis A. It is defined in a bisection plane. This is because the angle of the divided lower surface portion with respect to the plane F is the largest in the bisecting plane.
  • the first divided lower surface portion 3a has an upper surface 2 as it moves away from the axis A on a plane that crosses the first divided lower surface portion 3a and includes the central axis A. It is formed so as to be inclined to the side.
  • the second divided lower surface portion 3b and the third divided lower surface portion 3c are formed so that it may extend along each of several planes defined so that it may mutually cross
  • a triangular pyramid having a tip end pointed downward in the cutting insert 1 is formed, and the apex of the triangular pyramid is on the axis A. Located in.
  • Each projection bottom surface is provided with one projection so as to protrude from the division bottom surface.
  • the first divided lower surface 3a is provided with a first protrusion 7a
  • the second divided lower surface 3b is provided with a second protrusion 7b
  • the third divided lower surface 3c is provided with a third protrusion 7c.
  • the three protrusions have the same shape, are disposed adjacent to and around the through hole 5, and are arranged to be 120 ° rotationally symmetric with respect to the axis A, similarly to the three divided bottom surfaces.
  • Each projecting portion has two projecting end surface portions that extend from a side surface portion connected to the divided lower surface portion on which the projecting portion is provided and extend so as to substantially face the downward direction of the axis A.
  • the protruding portion 7a provided on the first divided lower surface portion 3a has two protruding end surface portions 7ab and 7ac having different inclinations.
  • the two protrusion end surface portions 7ab and 7ac are each configured as a flat surface.
  • One projecting end surface portion 7ab of the projecting portion 7a of the first divided lower surface portion 3a extends on a lower extended surface determined so as to extend a second divided lower surface portion 3b different from the first divided lower surface portion 3a. In this way, it is positioned closer to the second divided lower surface portion 3b than the other projection end surface portion 7ac.
  • the other protruding end surface portion 7ac of the protruding portion 7a of the first divided lower surface portion 3a extends on a lower extended surface that is determined to extend a third divided lower surface portion 3c different from the first divided lower surface portion 3a. It is formed in this way, and is positioned closer to the third divided lower surface portion 3c than the one projection end surface portion 7ab.
  • the second projection 7b of the second divided lower surface 3b and the third projection 7c of the third divided lower surface 3c have the same characteristics as the first projection 7a of the first divided lower surface 3a.
  • the second projecting portion 7b of the second divided lower surface portion 3b includes two flat projecting end surface portions 7ba and 7bc, and one projecting end surface portion 7ba is defined as a lower extension that extends the first divided lower surface portion 3a.
  • the other projecting end surface portion 7bc is formed so as to extend on a lower extension surface that is defined so as to extend the third divided lower surface portion 3c.
  • the third projecting portion 7c of the third divided lower surface portion 3c includes two flat projecting end surface portions 7ca and 7cb, and one projecting end surface portion 7ca is a lower extension defined to extend the first divided lower surface portion 3a.
  • the other projecting end surface portion 7cb is formed so as to extend on a lower extended surface that is defined so as to extend the second divided lower surface portion 3b.
  • FIG. 2 shows a lower extension surface P defined to extend the divided lower surface portion 3a.
  • the protruding end surface portion 7ca of the protruding portion 7c extends.
  • the first projecting portion 7a is divided into two equal parts by the bisection plane defined including the axis A so as to substantially bisect each of the first divided upper surface part 2a and the first divided lower surface part 3a. Is done. Two projecting end surface portions 7ab and 7ac are arranged symmetrically with respect to the bisecting plane. The same applies to the second protrusion 7b and the third protrusion 7c.
  • the peripheral side surface 4 of the cutting insert 1 mainly has three side surfaces 4 a, 4 b, and 4 c so as to correspond to the configurations of the upper surface 2, the lower surface 3, and the protrusion 7.
  • the first side surface 4a extends between the first divided upper surface portion 2a and the first divided lower surface portion 3a.
  • the second side surface 4b extends between the second divided upper surface portion 2b and the second divided lower surface portion 3b.
  • the third side surface 4c extends between the third divided upper surface portion 2c and the third divided lower surface portion 3c.
  • the first, second, and third cutting edges 6a, 6b, and 6c are formed at the edges of the first, second, and third side surfaces 4a, 4b, and 4c.
  • the three notches 8 are formed on the peripheral side surface 4.
  • the three notches 8 are formed at positions that are rotationally symmetrical by 120 ° with the central axis A as the center.
  • the surface of the notch 8 is a portion that comes into contact with the side wall of the insert mounting seat when the cutting insert 1 is attached to the tool body.
  • Each notch is formed so as to extend over two of the three side surfaces of the peripheral side surface 4.
  • each notch is formed so as to be biased to one of the two side surfaces and is formed to be continuous with the lower surface 3.
  • each notch may be formed so as to extend between the two side surfaces.
  • the bisector plane since the notch portion 8 is formed so as to be biased to one of the two side surfaces, the bisector plane does not strictly divide the corresponding divided lower surface portion into two halves. However, when the notch is not provided, the bisected plane can extend so as to bisect the corresponding divided lower surface.
  • the cutting insert 1 having the above configuration is detachably attached to the insert mounting seat 12 of the tool main body 11 of the cutting edge exchangeable cutting tool 10 of the present embodiment using screws that are mechanical attachment means.
  • FIG. 8 to FIG. 16 the blade tip exchangeable cutting tool 10 to which the cutting insert 1 is attached will be further described.
  • the cutting tool 10 includes a tool body 11 provided with a plurality of insert mounting seats 12.
  • the cutting insert 1 can be detachably attached to each insert mounting seat 12.
  • this invention does not exclude the cutting tool provided with the tool main body provided with only one insert mounting seat.
  • the tool body 11 is configured to rotate around a rotation axis O determined so as to pass through the tool body 11 from the rear end portion to the tip end portion.
  • a rotation axis O determined so as to pass through the tool body 11 from the rear end portion to the tip end portion.
  • five insert mounting seats are arranged at equal intervals (see FIG. 9). Therefore, the cutting tool 10 is a rotary cutting tool.
  • the cutting insert 1 is attached to one insert mounting seat 12 of the tool body 11 so that the upper surface 2 faces in the rotation direction K around the rotation axis O.
  • the insert mounting seat 12 includes a bottom wall portion 13 and a side wall portion 14 and is open toward the outer periphery on the front end side of the tool body.
  • the cutting insert is placed on the insert mounting seat and fixed with screws S so that one cutting edge of the cutting insert 1 can be used.
  • the structure of the insert mounting seat will be specifically described by taking as an example a case where the cutting insert 1 is mounted on the insert mounting seat 12 so that the first cutting edge 6a can be used.
  • the cutting insert 1 is attached to the insert mounting seat 12 using the first cutting edge 6 a as a used cutting edge.
  • the case where the cutting insert 1 is attached to the insert mounting seat using the second cutting edge 6b or the third cutting edge 6c as the use cutting edge is the same as that of the first cutting edge 6a.
  • the bottom wall portion 13 of the insert mounting seat 12 is formed with a first abutted surface portion 13a, a second abutted surface portion 13b, a recessed portion 13c, and a screw hole 13d.
  • the first abutted surface portion 13a is a substantially flat surface portion, and a recessed portion 13c and a screw hole 13d are disposed in the middle thereof.
  • the second abutted surface portion 13b is positioned on the back side of the bottom wall portion 13, and is not on the extension of the first abutted surface portion 13a.
  • 13 d of screw holes are formed in the middle of the 1st to-be-contacted surface part 13a, and are located in the back
  • the first divided lower surface portion 3a related to the first cutting edge 6a and the first divided lower surface portion 3a.
  • the projection end surface portion 7ba of the second projection portion 7b of the second divided lower surface portion 3b and the projection end surface portion 7ca of the third projection portion 7c of the third divided lower surface portion 3c which are formed so as to extend on the same plane.
  • the first abutted surface portion 13a is formed so as to abut on the first abutted surface portion 13a.
  • the first divided lower surface portion 3a, the projecting end surface portion 7ba, and the projecting end surface portion 7ca are simultaneously in contact with the first abutted surface portion 13a, that is, the surface portions 3a, 7ba, 7ca
  • the recessed portion 13c is positioned and formed so that the first protrusion 7a positioned therebetween is accommodated in the recessed portion, that is, the recessed portion 13c.
  • the recess 13c of the insert mounting seat 12 is adapted to the shape of the protrusion of the cutting insert 1.
  • the screw hole 13 d is formed obliquely with respect to the first contacted surface portion 13 a of the bottom wall portion 13.
  • the inclination of the screw hole can be determined between the hole axis B of the screw hole and the plane H that is determined so as to include the first contacted surface portion 13a.
  • the inclination of the screw hole 13d is determined in a plane that includes the axis B and is defined to be orthogonal to the plane H.
  • FIG. 16 is also a cross-sectional view in a plane that includes the axis B and is defined to be orthogonal to the plane H.
  • the insert mounting seat 12 enables the cutting insert 1 to use the first cutting edge 6a.
  • the insert mounting seat 12 is formed so that the two equally divided planes of the first cutting edge 6a and the first divided upper surface portion 2a overlap.
  • FIG. 16 a line C determined to be orthogonal to the plane H is shown.
  • the screw hole 13d is inclined with respect to the first contact surface portion 13a so that the axis B of the screw hole 13d forms an inclination angle ⁇ s with respect to the line C.
  • the inclination angle ⁇ s is equal to the inclination angle ⁇ a, ⁇ b or ⁇ c.
  • the second abutted surface portion 13b of the bottom wall portion 13 of the insert mounting seat 12 is related to the first cutting edge 6a when the cutting insert is attached to the insert mounting seat 12 so that the first cutting edge 6a can be used.
  • the boundary portion between the second and third divided lower surface portions 3b and 3c, that is, the interposition portion 3d is formed thereon.
  • the side wall portion 14 of the insert mounting seat is formed so as to connect to the second abutted surface portion 13b.
  • the side wall portion 14 of the insert mounting seat 12 has a shape that matches the peripheral side surface 4 of the cutting insert 1.
  • Two step portions 14a and 14b are formed on the side wall portion 14 (see FIGS. 14 to 16).
  • One step portion 14a of the two step portions is formed at a portion of the side wall portion 14 facing the tip outer peripheral side of the tool body 11, and the other step portion 14b of the two step portions is a side wall portion.
  • 14 is formed at a portion facing the tip side of the tool body 11.
  • a coolant injection hole 15 is formed in the vicinity of the insert mounting seat 12.
  • the coolant can be supplied to the injection holes through a supply passage (not shown) formed so as to extend in the tool body 11 from the rear end portion to the tip portion of the tool body 11 during cutting. As a result, coolant is sprayed toward the cutting insert 1.
  • the cutting insert 1 includes the divided lower surface portions 3 a, 3 b, and 3 c that are arranged rotationally symmetrically with respect to the axis A of the through hole 5.
  • Each of the divided lower surface portions 3a, 3b, and 3c is formed to be inclined at a predetermined inclination with respect to a plane F that is determined to be orthogonal to the axis A of the through hole 5.
  • the first contacted surface portion 13a of the insert mounting seat 12 of the tool body 11 is in contact with the projecting end surface portion of the projecting portion of the divided lower surface portion and the other divided lower surface portion with respect to the usable cutting edge. Is formed.
  • the screw hole 13d of the insert mounting seat 12 has a predetermined angle that is substantially the same as the predetermined angle of the insert with respect to the line C that is defined to be perpendicular to the first contacted surface portion 13a. Is formed obliquely with respect to the first abutted surface portion 13a. Therefore, in such an insert mounting seat 12, the cutting insert 1 is disposed so that the axis A of the through hole 5 and the axis B of the screw hole 13 d are preferably parallel to each other, and the screw S is inserted into the through hole. The cutting insert 1 is attached and fixed by being screwed into the screw hole 13 d through 5.
  • the screw S can cause the cutting insert 1 to exert a force that presses the cutting insert 1 substantially uniformly against the first abutted surface portion 13a spreading around the screw hole of the insert mounting seat. Therefore, the cutting insert 1 is firmly fixed to the insert mounting seat 12.
  • the cutting insert 1 includes the above-described three divided lower surface portions, and has a substantially triangular pyramid-shaped lower surface 3 that protrudes downward in the cutting insert as a whole.
  • the insert mounting seat forms a pocket shape, that is, a recess, with the bottom wall portion and the side wall portion having the abutted surface portion. Therefore, the cutting insert is disposed on the insert mounting seat so that the cutting insert fits into a space defined by the plurality of wall surfaces of the insert mounting seat. In this state, as described above, the screw exerts a force pressing the cutting insert 1 toward the bottom wall portion and the side wall portion of the insert mounting seat, so that the cutting insert is firmly fixed by the insert mounting seat.
  • the cutting insert when the cutting insert is attached to the insert mounting seat so that the first cutting edge 6a can be used, the cutting blade that can be used on the second abutting surface portion 13b of the bottom wall portion of the insert mounting seat Portions other than the related divided lower surface portions are placed. Therefore, the seating stability of the cutting insert on the insert mounting seat is improved.
  • the cutting insert 1 and the cutting tool 10 only one interposition part 3d abuts against the second abutted surface part 13b, so that the abutting area of the cutting insert against the second abutted part is compared.
  • the second contact surface portion may be formed in a shape that is more suitable for the shape of the cutting insert, and the contact region of the cutting insert with respect to the second contact surface portion may be widened.
  • step portions 14 a and 14 b are formed on the side wall portion 14 of the insert mounting seat, and the two notches 8 formed in the cutting insert 1 when the cutting insert 1 is mounted on the insert mounting seat 12. Are in contact with the corresponding stepped portions. Therefore, sufficient contact between the cutting insert and the insert mounting seat is further ensured, and the seating stability of the cutting insert 1 at the insert mounting seat is further enhanced.
  • the projection 7 a, 7 b or 7 c of the cutting insert 1 is accommodated in the recess 13 c of the insert mounting seat 12. Therefore, the seating stability of the cutting insert 1 at the insert mounting seat 12 is further enhanced by the engagement between the recess and the projection. Therefore, even when a force for rotating the cutting insert 1 is applied to the cutting insert 1 during cutting with the cutting tool 10, the cutting insert 1 is more reliably prevented from sliding on the insert mounting seat 12 and attempting to rotate. (Rotation prevention effect)
  • the cutting insert is firmly fixed to the insert mounting seat, the offset processing for shifting the axis of the through hole of the cutting insert and the axis of the screw hole of the insert mounting seat is unnecessary. Therefore, in the cutting insert and the cutting tool, the bending moment is suppressed from being applied to the mounting screw, and the load applied to the screw is preferably equalized. For this reason, the life of the screw can be extended, and thereby the life of the cutting insert and the tool body can be extended.
  • the divided upper surface portion is formed to be inclined with respect to the plane F so as to form an angle of less than 90 ° with respect to the plane F. Therefore, when the cutting insert is disposed and attached to the insert mounting seat, it is possible to prevent the axial rake from becoming significantly negative, and it is preferable to easily make the axial rake positive. Thereby, the fall of the cutting insert sharpness can be suppressed or improved.
  • FIGS. 1-10 The cutting insert 101 of the second embodiment is shown in FIGS.
  • the cutting insert 101 is different from the cutting insert 1 of the first embodiment in that the protrusion 7 is not provided on the lower surface 3. Regarding other configurations, the cutting insert 101 is substantially the same as the cutting insert 1.
  • FIG. 22 shows a state in which the cutting insert 101 is attached to an insert mounting seat formed at the tip of the tool body of the cutting tool according to the second embodiment.
  • FIG. 22 is drawing equivalent to FIG. 12 regarding 1st Embodiment.
  • the bottom wall portion 13 of the insert mounting seat 12 has a more suitable shape along the shape of the lower surface 3 of the cutting insert 1. That is, the bottom wall portion 13 of the insert mounting seat 12 is formed so that the three divided lower surface portions of the cutting insert abut around the screw hole. In particular, the second abutted surface portion 13b is formed so that the divided lower surface portions 3b and 3c that are not related to the usable cutting edge 6a abut. Therefore, in the cutting insert and cutting tool of the second embodiment, a large contact area between the cutting insert and the bottom wall portion of the insert mounting seat is further ensured, and the cutting insert can be firmly fixed to the insert mounting seat.
  • the cutting insert 101 is provided with the above-mentioned three division
  • the insert mounting seat forms a substantially triangular pyramid-shaped pocket, that is, a recess, by a bottom wall portion having a shape corresponding to the three divided lower surface portions. Therefore, the seating stability of the cutting insert on the insert mounting seat is increased, and the cutting insert is more securely fixed to the insert mounting seat more securely against the force of rotating the cutting insert.
  • 2nd Embodiment similarly has the effect
  • FIGS. 1-10 The cutting insert 201 of the third embodiment is shown in FIGS.
  • the cutting insert 201 has a shape that is 180 ° rotationally symmetric with respect to the central axis A of the through-hole 5, and includes two rectangular bottom surfaces 3a and 3b. Each of the divided lower surface portions 3a and 3b is a substantially flat surface and is disposed so as to form a substantially V shape.
  • Each of these divided lower surface portions 3a and 3b also has a predetermined inclination with respect to a plane F defined so that the central axis A is orthogonal, as in the case of the divided lower surface portion of the first embodiment.
  • Each of the divided lower surface portions 3a and 3b is a plane that inclines toward the upper surface 2 side with increasing distance from the axis A on a plane that crosses the divided lower surface portion and includes the central axis A. Inclined with respect to F.
  • segmentation lower surface parts 3a and 3b are related with respect to each other so that two planes defined so as to extend them may intersect on the central axis A.
  • Two protrusions 7a and 7b are provided on each divided lower surface.
  • the two projecting portions 7a provided on one divided lower surface portion 3a are disposed so as to face the two projecting portions 7b provided on the other divided lower surface portion 3b.
  • the protrusion end surface portions 7ab of the two protrusion portions 7a provided on the first divided lower surface portion 3a are formed to extend on the extended surface of the second divided lower surface portion 3b.
  • the projection end surface portions 7ba of the two projection portions 7b provided on the second divided lower surface portion 3b are also formed to extend on the extended surface of the first divided lower surface portion 3a.
  • the insert mounting seat of the tool body of the third embodiment also has the same characteristics as the insert mounting seat of the tool body of the first embodiment.
  • FIGS. 1-10 The cutting insert 301 of the fourth embodiment is shown in FIGS.
  • the cutting insert 301 has a 90 ° rotationally symmetric shape with respect to the central axis of the through hole, and includes four large divided lower surface portions 3a, 3b, 3c, and 3d disposed at the corners of the lower surface 3, and a large divided lower surface.
  • a total of eight divided lower surface portions including four small divided lower surface portions 3e, 3f, 3g, and 3h arranged between the portions are provided. These large divided lower surface portions and small divided lower surface portions are alternately arranged around the axis A. Therefore, the four large divided lower surface portions are arranged away from each other.
  • the four large divided lower surface portions 3a, 3b, 3c, and 3d correspond to the divided lower surface portions in the first to third embodiments. Accordingly, each of the four large divided lower surface portions 3a, 3b, 3c, and 3d is also predetermined with respect to the plane F that is defined so that the central axis A is orthogonal to the predetermined lower surface portion in the first embodiment. Has a slope of. Then, each of the four large divided lower surface portions 3a, 3b, 3c, 3d crosses the large divided lower surface portion, and on the plane determined to include the central axis A, the upper surface 2 It is inclined with respect to the plane F so as to incline to the side. Further, these four large divided lower surface portions 3a, 3b, 3c, and 3d are related to each other such that four planes that are defined so as to extend them intersect at substantially one point on the central axis A.
  • the protrusions are formed only on the small divided lower surface portions.
  • the surfaces extending on the extended surface of the large divided lower surface portion 3a are the protruding end surface portion 7ga of the protruding portion 7g formed on the small divided lower surface portion 3g and the protruding end surface portion of the protruding portion 7h formed on the small divided lower surface portion 3h. 7 ha.
  • the surfaces extending on the extended surface of the large divided lower surface portion 3b are the protrusion end surface portion 7hb of the protrusion portion 7h formed on the small divided lower surface portion 3h and the protrusion end surface portion of the protrusion portion 7e formed on the small divided lower surface portion 3e. 7 eb.
  • the surface extending on the extended surface of the large divided lower surface portion 3c is a protrusion end surface portion 7fc of the protruding portion 7f formed on the small divided lower surface portion 3f and the protrusion of the protruding portion 7e formed on the small divided lower surface portion 3e. This is the end face portion 7ec.
  • the surface extending on the extended surface of the large divided lower surface portion 3d is a protrusion end surface portion 7fd of the protruding portion 7f formed on the small divided lower surface portion 3f and the protrusion of the protruding portion 7g formed on the small divided lower surface portion 3g. It is an end face part 7gd.
  • the cutting insert of the fourth embodiment having such a configuration is also stably attached to the insert mounting seat of the tool body of a cutting tool (not shown and not described).
  • the insert mounting seat of the tool body of the fourth embodiment has the same characteristics as the insert mounting seat of the tool body of the first embodiment.
  • the divided upper surface portion and the divided lower surface portion in the downward direction are parallel to each other, but their extended surfaces are planes orthogonal to the central axis A at different angles.
  • a cutting insert having a shape in which the inclination angle of the divided upper surface portion with respect to the plane F is ⁇ 1 and the inclination angle of the divided lower surface portion with respect to the plane F is ⁇ 2 smaller than ⁇ 1 is allowed in the present invention.
  • a cutting insert that reverses the magnitude relationship between the angle ⁇ 1 and the angle ⁇ 2 is also allowed.
  • chip breaker is not particularly provided in the cutting insert of the above-described embodiment, it may be provided. By forming the chip breaker on the upper surface, advantageous effects such as improvement of chip dischargeability and promotion of appropriate curling of chips can be expected.
  • a concave portion or a convex portion may be provided on the side surface of the cutting insert, and a convex portion or a concave portion engaging therewith may be provided on the side wall portion of the insert mounting seat. Their engagement can enhance the fixation of the cutting insert to the insert mounting seat.
  • the fastening force can be increased by forming them into a tapered shape.
  • the screw hole formed in the insert mounting seat is directly formed in the bottom wall portion of the insert mounting seat in the above-described embodiment.
  • a female threaded protrusion with an internal thread formed on the inside is formed obliquely with respect to the bottom wall of the insert mounting seat, and the female threaded protrusion is fitted into the through hole of the cutting insert.
  • Such a form is also possible.
  • the effect of preventing rotation of the cutting insert 1 can be enhanced by making the cross-sectional shapes of the female threaded protrusion and the through hole not a circle but a polygon such as a triangle or a quadrangle.
  • a long concave groove extending in the thickness direction of the cutting insert may be formed on the side surface of the cutting insert, and a convex portion for fitting into the concave groove may be provided on the side wall of the insert mounting seat.
  • the detent effect of the cutting insert can be enhanced.
  • groove formed in the side surface which does not face the side wall part of insert mounting seat can also exhibit the effect as a nick.
  • the concave groove can be utilized as a means for positioning.
  • the present invention can be applied not only to the rolling tool as in the above embodiment but also to other forms of cutting tools such as a turning tool and a drilling tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Drilling Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

Un insert d'usinage tel que dans un premier mode de réalisation de la présente invention est doté d'un trou débouchant qui s'étend de sorte que le trou débouchant traverse des première et seconde surfaces d'extrémité qui se situent sur des côtés mutuellement opposés. Plusieurs lames coupantes sont disposées sur une région de ligne de crête qui croise la première surface d'extrémité et une surface latérale périphérique de sorte que les lames coupantes soient symétriques en rotation par rapport à l'axe central du trou débouchant. Plusieurs régions de surface segmentée sont disposées sur la seconde surface d'extrémité de sorte que les régions de surface segmentée soient symétriques en rotation par rapport à l'axe central de la seconde surface d'extrémité. Chaque région de surface segmentée est corrélée à une lame coupante et est formée de manière à avoir une inclinaison fixe par rapport à un plan plat qui est établi de manière à être perpendiculaire à l'axe central. Lorsque l'insert d'usinage est monté sur le support de montage d'insert à l'aide d'une vis, les régions de surface segmentée qui sont corrélées aux lames coupantes utilisables entrent en contact avec la surface de contact du support de montage d'insert, et l'axe du trou de vis du support de montage d'insert et l'axe central du trou débouchant deviennent parallèles.
PCT/JP2012/073287 2011-09-12 2012-09-12 Insert d'usinage et outil d'usinage Ceased WO2013039090A1 (fr)

Priority Applications (1)

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JP2013533681A JP5835337B2 (ja) 2011-09-12 2012-09-12 切削インサートおよび切削工具

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JP2011-197899 2011-09-12
JP2011197899 2011-09-12

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WO2013039090A1 true WO2013039090A1 (fr) 2013-03-21

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WO2015025748A1 (fr) * 2013-08-19 2015-02-26 株式会社タンガロイ Plaquette de coupe
WO2016084891A1 (fr) * 2014-11-27 2016-06-02 株式会社タンガロイ Plaquette de coupe et outil de coupe rotatif à bord remplaçable
WO2016084898A1 (fr) * 2014-11-27 2016-06-02 株式会社タンガロイ Insert de coupe, corps d'outil et outil de coupe
WO2017010267A1 (fr) * 2015-07-15 2017-01-19 株式会社タンガロイ Corps d'outil et outil de coupe rotatif à bord de lame remplaçable
EP3305449A1 (fr) * 2016-10-05 2018-04-11 Sandvik Intellectual Property AB Outil de fraisage de face et insert de coupe tangentiel
CN110116351A (zh) * 2019-05-10 2019-08-13 河南华创通信设备有限公司 一种光纤成端机
CN114147270A (zh) * 2020-09-07 2022-03-08 株式会社泰珂洛 铣削工具
JPWO2023176533A1 (fr) * 2022-03-14 2023-09-21

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JP2005153140A (ja) * 2003-11-25 2005-06-16 Sandvik Ab 切屑除去加工用工具
JP2008188763A (ja) * 2007-01-31 2008-08-21 Sandvik Intellectual Property Ab 切削工具、切削インサートおよび工具本体

Cited By (26)

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Publication number Priority date Publication date Assignee Title
JPWO2015025748A1 (ja) * 2013-08-19 2017-06-22 株式会社タンガロイ 切削インサート
WO2015025748A1 (fr) * 2013-08-19 2015-02-26 株式会社タンガロイ Plaquette de coupe
US10322458B2 (en) 2014-11-27 2019-06-18 Tungaloy Corporation Cutting insert having bottom surface with inclined parts and indexable rotary cutting tool
CN107000081A (zh) * 2014-11-27 2017-08-01 株式会社泰珂洛 切削刀片、工具体及切削工具
JP5991565B1 (ja) * 2014-11-27 2016-09-14 株式会社タンガロイ 切削インサート、工具ボデーおよび切削工具
CN107073604B (zh) * 2014-11-27 2019-07-30 株式会社泰珂洛 切削刀片及刀头更换式旋转切削工具
WO2016084898A1 (fr) * 2014-11-27 2016-06-02 株式会社タンガロイ Insert de coupe, corps d'outil et outil de coupe
EP3964315A1 (fr) 2014-11-27 2022-03-09 Tungaloy Corporation Insert de coupe et outil de coupe
US10335872B2 (en) 2014-11-27 2019-07-02 Tungaloy Corporation Cutting insert having arc-shaped cutting edges and inclined seating surfaces, tool body and cutting tool
CN107073604A (zh) * 2014-11-27 2017-08-18 株式会社泰珂洛 切削刀片及刀头更换式旋转切削工具
WO2016084891A1 (fr) * 2014-11-27 2016-06-02 株式会社タンガロイ Plaquette de coupe et outil de coupe rotatif à bord remplaçable
JP5988186B1 (ja) * 2014-11-27 2016-09-07 株式会社タンガロイ 切削インサート及び刃先交換式回転切削工具
JPWO2017010267A1 (ja) * 2015-07-15 2017-07-13 株式会社タンガロイ 工具ボデー及び刃先交換式回転切削工具
WO2017010267A1 (fr) * 2015-07-15 2017-01-19 株式会社タンガロイ Corps d'outil et outil de coupe rotatif à bord de lame remplaçable
WO2018065129A1 (fr) * 2016-10-05 2018-04-12 Sandvik Intellectual Property Ab Outil de fraisage en bout et insert de coupe tangentielle pour celui-ci
EP3305449A1 (fr) * 2016-10-05 2018-04-11 Sandvik Intellectual Property AB Outil de fraisage de face et insert de coupe tangentiel
US11045885B2 (en) 2016-10-05 2021-06-29 Sandvik Intellectual Property Ab Face milling tool and a tangential cutting insert therefore
CN110116351A (zh) * 2019-05-10 2019-08-13 河南华创通信设备有限公司 一种光纤成端机
CN110116351B (zh) * 2019-05-10 2024-06-11 河南华创通信设备有限公司 一种光纤成端机
CN114147270A (zh) * 2020-09-07 2022-03-08 株式会社泰珂洛 铣削工具
US20220072633A1 (en) * 2020-09-07 2022-03-10 Tungaloy Corporation Milling tool
US11794260B2 (en) * 2020-09-07 2023-10-24 Tungaloy Corporation Milling tool
CN114147270B (zh) * 2020-09-07 2024-04-30 株式会社泰珂洛 铣削工具
WO2023176533A1 (fr) * 2022-03-14 2023-09-21 京セラ株式会社 Outil rotatif et procédé de production de pièce coupée
JPWO2023176533A1 (fr) * 2022-03-14 2023-09-21
JP7770537B2 (ja) 2022-03-14 2025-11-14 京セラ株式会社 回転工具及び切削加工物の製造方法

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