WO2011122676A1 - Plaquette de coupe et outil de coupe possédant un point de coupe interchangeable - Google Patents

Plaquette de coupe et outil de coupe possédant un point de coupe interchangeable Download PDF

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Publication number
WO2011122676A1
WO2011122676A1 PCT/JP2011/058119 JP2011058119W WO2011122676A1 WO 2011122676 A1 WO2011122676 A1 WO 2011122676A1 JP 2011058119 W JP2011058119 W JP 2011058119W WO 2011122676 A1 WO2011122676 A1 WO 2011122676A1
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WO
WIPO (PCT)
Prior art keywords
pair
insert
polygonal
cutting
intersecting
Prior art date
Application number
PCT/JP2011/058119
Other languages
English (en)
Japanese (ja)
Inventor
伸和 堀池
徹 作山
Original Assignee
三菱マテリアル株式会社
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 三菱マテリアル株式会社 filed Critical 三菱マテリアル株式会社
Priority to JP2012508367A priority Critical patent/JP5522253B2/ja
Publication of WO2011122676A1 publication Critical patent/WO2011122676A1/fr

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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
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B23C5/109—Shank-type cutters, i.e. with an integral shaft with removable cutting inserts
    • 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
    • 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 clamping mechanism for a cutting insert, and more particularly, to a cutting insert that is detachably attached to a cutting edge exchanging cutting tool used for a turning process, and a cutting edge exchanging cutting tool to which the cutting insert is attached.
  • Patent Document 1 Japanese Patent Laid-Open No. 2004-284010
  • the cutting insert of patent document 1 has a rectangular plate-shaped insert main body, and the cutting edge is formed in the side ridge part of a pair of rectangular surface of an insert main body. Of the pair of rectangular surfaces, a groove extending in the direction of one diagonal A is formed on the first rectangular surface, and descends from the two corners positioned on the other diagonal B toward the groove. Each slope is formed.
  • the second rectangular surface is formed with grooves extending in the diagonal B direction of the first rectangular surface when seen from the first rectangular surface side, and from two corners arranged in the diagonal A direction. A slope that descends toward the groove is formed. That is, the insert body has a shape that is twisted around two axes that are orthogonal to the center line connecting the centers of the first and second rectangular surfaces and orthogonal to the side surfaces of the four insert bodies. Has been.
  • This cutting insert is detachably attached to an insert mounting seat formed on the tool body of the cutting edge exchange type cutting tool.
  • the bottom surface of the insert mounting seat faces the tool rotation direction, and the shape of the bottom surface is a support surface complementary to the first rectangular surface, and the first rectangular surface is supported by the bottom surface.
  • two side surfaces of the insert body intersecting with the groove of the first rectangular surface are supported by two flat wall surfaces facing the tool body front end side and the outer peripheral side of the insert mounting seat.
  • the cutting insert of this patent document 1 is supported and attached to the two support surfaces of the insert mounting seat in this way, for example, it faces the tool body front end side of the insert mounting seat.
  • the support surface of the wall surface needs an area sufficient to support the side surface of the insert body.
  • a thickness necessary for receiving the cutting load in the rotation axis direction acting on the insert main body must be secured on the rear end side of the support surface in the tool main body.
  • the present invention is made under such a background, and there is no need for a plurality of support surfaces on the wall surface of the insert mounting seat, so that the insert mounting seat rear side and inner peripheral side of the cutting edge exchangeable cutting tool can be provided.
  • the purpose of the present invention is to provide a cutting insert capable of improving chip efficiency by forming a large chip pocket and improving chip discharging performance, and by attaching more cutting inserts in the rotation axis direction and circumferential direction of the tool body. It is said.
  • this invention aims at providing the blade-tip-exchange-type cutting tool which attached the said cutting insert.
  • the cutting insert according to one aspect of the present invention is a cutting insert that is detachably attached to an insert mounting seat of a cutting edge exchangeable cutting tool, and includes any one of the following configurations.
  • a cutting insert that is detachably attached to an insert mounting seat of a cutting edge exchangeable cutting tool, A polygonal plate-like insert body having a pair of polygonal surfaces and a plurality of side surfaces arranged around the polygonal surfaces, A cutting edge is formed on the side ridge of the polygonal surface,
  • the insert body is a reverse-inverted symmetrical shape with respect to the pair of polygonal surfaces,
  • the pair of polygonal surfaces is a seating surface on which the other polygonal surface is seated on the bottom surface of the insert mounting seat when one of the polygonal surfaces is a rake face,
  • a contact surface that is a pair of flat surfaces is formed on each of the pair of polygonal surfaces,
  • the pair of abutment surfaces can abut against a pair of abutment surfaces formed on the bottom surface of the insert mounting seat when the one polygonal surface is the seating surface,
  • the two virtual extension surfaces obtained by extending the pair of contact surfaces intersect each other at a crossing ridgeline in
  • the insert main body has a shape that is 180 ° rotationally symmetric with respect to the center line of the pair of polygonal surfaces, The insert main body is placed on the center line on the other one side surface with respect to one polygonal surface facing the other direction of the direction in which the intersecting ridgeline of the virtual extension surface of the pair of contact surfaces extends. Another contact portion that can contact the contacted portion when rotated 180 ° around is formed.
  • each of the polygonal surfaces of the insert body has a rectangular shape
  • the insert body has a pair of long side surfaces arranged on opposite sides and a pair of short side surfaces arranged on opposite sides,
  • a main cutting edge is formed at each intersection ridge line portion between each polygonal surface and each long side surface, The main cutting edge is inclined so as to gradually recede in the thickness direction from one corner portion to the other corner portion when viewed from the side facing the long side surface.
  • the pair of contact surfaces are formed on the inside of the polygonal surface.
  • the intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction intersecting with the long side surface when viewed from the direction facing the polygonal surface,
  • the contact portion is formed on the long side surface.
  • the intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction obliquely intersecting the long side surface when viewed from the direction facing the polygonal surface.
  • the intersecting ridge line is formed in a direction intersecting with a diagonal line of the one corner portion on the polygonal surface when viewed from the direction facing the polygonal surface.
  • the polygonal surface of the insert main body has a parallelogram shape having a pair of obtuse corner portions and a pair of acute corner portions, Corner blades are respectively formed at the acute corner portions of the polygonal surfaces, A main cutting edge is formed at each intersection ridge line portion between each polygonal surface and each long side surface, The main cutting edge is inclined so as to gradually recede in the thickness direction from the acute corner portion to the obtuse corner portion when viewed from the side facing the long side surface, The intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction intersecting with the long side surface as viewed from the direction facing the polygonal surface.
  • the parallelogram includes a rectangle.
  • intersection ridgeline of the virtual extension surface of the pair of contact surfaces is closer to the obtuse corner portion than the acute corner portion when viewed from the direction facing the polygonal surface. , Extending in a direction crossing the long side surface.
  • the intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction intersecting with the short side surface when viewed from the direction facing the polygonal surface,
  • the contact portion is formed on the short side surface.
  • the intersecting ridgeline of the virtual extension surface of the pair of contact surfaces extends in a direction obliquely intersecting the short side surface when viewed from the direction facing the polygonal surface.
  • the intersecting ridge line is formed in a direction intersecting with a diagonal line of the one corner portion on the polygonal surface when viewed from the direction facing the polygonal surface.
  • the polygonal surface of the insert body has a parallelogram shape having a pair of obtuse corner portions and a pair of acute corner portions, Corner blades are respectively formed at the acute corner portions of the polygonal surfaces, A main cutting edge is formed at each intersection ridge line portion between each polygonal surface and each long side surface, The main cutting edge is inclined so as to gradually recede in the thickness direction from the acute corner portion to the obtuse corner portion when viewed from the side facing the long side surface, The intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction intersecting the short side surface as viewed from the direction facing the polygonal surface.
  • the parallelogram includes a rectangle.
  • the intersecting ridge line of the virtual extension surface of the pair of contact surfaces is closer to the obtuse corner portion than the acute corner portion when viewed from the direction facing the polygonal surface. , Extending in a direction intersecting the short side surface.
  • the contact portion is a concave groove having a concave cross section formed on the side surface, and the concave groove is formed between the pair of polygonal surfaces. And is capable of coming into contact with the abutted portion having a convex cross-sectional shape formed on one wall surface of the insert mounting seat.
  • a cutting edge exchangeable cutting tool A tool body rotated about an axis,
  • the cutting insert according to any one of (1) to (17), which is detachably attached to the outer periphery of the tool body,
  • one or more insert mounting seats are formed with the bottom surface facing the tool rotation direction and the one wall surface facing the outer peripheral side or the axial direction front end side,
  • a pair of the abutted surfaces that abut against the abutting surface of the cutting insert is formed, respectively.
  • the two virtual extension surfaces obtained by extending the pair of contacted surfaces intersect each other at an intersecting ridge line in a cross-section inverted V shape or a cross-section V shape complementary to the contact surface of the cutting insert, A cutting edge, wherein the one wall surface of the insert mounting seat is formed with a contacted portion that contacts the contact portion of the cutting insert at a position where the intersecting ridge line of the contacted surface is directed.
  • Replaceable cutting tool
  • the cross-section V-shaped formed on the bottom surface of the insert mounting seat or A pair of abutting surfaces extending along a virtual extension surface intersecting the reverse V-shaped cross-section are formed on the seating surface of the insert, and a pair of contact surfaces extending along the virtual extension surface intersecting the reverse V-shape.
  • the contact surface is brought into contact. Therefore, the insert main body is allowed to move along the abutted surface in the direction along the intersecting ridge line of the virtual extension surface of the pair of abutting surfaces, but the movement is restricted in other directions.
  • One side surface of the insert main body is formed on one wall surface of the insert mounting seat with respect to one polygonal surface facing one direction in the direction in which the intersecting ridgelines of the virtual extension surfaces of the pair of contact surfaces extend. Since the abutment part that can abut against the abutted part is formed, the abutment part abuts against the abutted part by pressing the insert body in this direction and attaching it to the insert mounting seat.
  • the insert body is also restrained in the direction of the intersecting ridgeline and is fixed to the insert mounting seat. That is, the insert body is fixed by the abutted surface of the bottom surface of the insert mounting seat and the abutted portion of one insert mounting seat wall surface, and no other wall surface is required.
  • the wall surface on which the abutted portion is provided is arranged on the inner peripheral side of the tool body on the bottom surface of the insert mounting seat, the wall surface on the rear end side of the tool body can be reduced, or the tool body on the rear end side of the wall surface
  • the wall thickness can be reduced, or in some cases, the wall surface itself can be made unnecessary. For this reason, it becomes possible to attach many cutting inserts by forming a large chip pocket on the tool body rear end side of the insert mounting seat or by forming the next insert mounting seat close to the axial direction. .
  • the wall surface on which the abutted part is provided is arranged on the tool body rear end side of the insert mounting seat, the wall surface on the inner peripheral side of the tool body is conversely reduced, or the tool body on the inner peripheral side of this wall surface
  • the wall thickness can be reduced, or in some cases, the wall surface itself can be made unnecessary. Accordingly, the insert pocket on the inner peripheral side of the insert mounting seat is enlarged, or even a cutting tool with a very small diameter can be installed with a plurality of insert mounting seats in the circumferential direction to mount more cutting inserts. be able to.
  • the insert main body is made into the front-and-back inversion symmetrical shape,
  • the above-mentioned one side surface which faces one direction among the said cross ridgeline directions of the contact surface about each of a pair of front and back polygon surfaces A contact portion is formed, and therefore, by reversing the insert body and reattaching it to the insert mounting seat, these polygonal surfaces are alternately raked and seated, respectively, at least twice with one insert body, It is possible to use a cutting blade formed on a side ridge portion of a polygonal surface which is a rake face.
  • the insert main body is also 180 ° rotationally symmetric with respect to the center line of the pair of polygonal surfaces, and is directed to the other direction among the directions in which the intersecting ridgelines of the virtual extension surfaces of the pair of contact surfaces extend.
  • another side surface that is, the side surface opposite to the one side surface facing the one direction, is moved to the contacted portion when the insert body is rotated 180 ° around the center line.
  • the cutting blade formed at the intersection ridge line portion between the long and short side surfaces and the square surface can be used at least four times in one insert body.
  • a main cutting edge is formed at each intersection ridge line portion between each polygonal surface and each long side surface, and when the main cutting edge is viewed from the side facing the long side surface, from one corner to the other
  • the polygonal surface is complicatedly twisted because the height in the thickness direction of one corner and the other is different. Even if the insert is composed of such a polygonal surface twisted in a complicated manner, the above functions can be achieved by forming a pair of abutment surfaces on the polygonal surface. Can do.
  • the pair of contact surfaces on the inside of the polygonal surface, it is possible to form a positive rake surface along the cutting edge of the contact surface and the side ridge portion of the polygonal surface. It becomes. Moreover, since an outer peripheral part does not contact
  • the intersecting ridge line of the virtual extension surface of the pair of contact surfaces may extend in a direction obliquely intersecting the long side surface or the short side surface. If the intersecting ridge line of the virtual extension surface of the pair of contact surfaces extends in a direction obliquely intersecting the long side surface, the contact portion is formed on the long side surface facing the intersecting ridge line direction, and the pair of contact surfaces If the intersecting ridgeline of the virtual extension surface of the surface extends in a direction obliquely intersecting the short side surface, the contact portion is formed on the short side surface.
  • the intersecting ridge line is directed in a direction intersecting the diagonal line of the one corner in the polygonal surface.
  • the intersecting ridge line is separated from one corner portion, and the shape design of the positive rake face of the corner blade and the positive main cutting edge in the vicinity of the corner blade becomes easy.
  • the abutting portion may be configured such that the entire side surface of the insert body comes into contact with the one wall surface of the insert mounting seat, and the side surface partially contacts the wall surface. May be. Further, on this side surface, a concave groove having a cross-sectional concave shape extending between the pair of polygonal surfaces is formed as an abutting portion, and this is formed into a convex curved shape on the one wall surface of the insert mounting seat. In this case, even if the molding accuracy of the insert main body is not so high, the concave groove having a concave cross section formed by the abutting section is cross-sectioned. The insert body can be reliably supported by abutting at least line contact with the convex curved contacted portion.
  • a large chip pocket can be secured on the tool body rear end side or inner peripheral side of the insert mounting seat.
  • FIG. 3 is a ZZ sectional view in FIG. 2. It is a perspective view which shows 1st Embodiment of the blade-tip-exchange-type cutting tool of this invention which attached the cutting insert of 1st Embodiment.
  • FIG. 8 is an enlarged perspective view of the tip end of the tool body with the cutting insert of the embodiment shown in FIG. 7 removed.
  • FIG. 10 is a plan view of the embodiment shown in FIG. 9.
  • FIG. 10 is a side view of the embodiment shown in FIG. 9. It is a front view of embodiment shown in FIG. It is the side view which looked at embodiment shown in FIG. 10 from the arrow Y direction. It is ZZ sectional drawing in FIG.
  • FIG. 16 is an enlarged perspective view of the distal end portion of the tool body with the cutting insert of the embodiment shown in FIG. 15 removed.
  • FIG. 18 is a side view of the embodiment shown in FIG. 17. It is a front view of embodiment shown in FIG. It is the side view which looked at embodiment shown in FIG. 18 from the arrow Y direction.
  • FIG. 19 is a ZZ sectional view in FIG. 18. It is a perspective view which shows 3rd Embodiment of the blade-tip-exchange-type cutting tool of this invention which attached the cutting insert of 3rd Embodiment.
  • FIG. 24 is an enlarged perspective view of the tip end of the tool body with the cutting insert of the embodiment shown in FIG. 23 removed.
  • FIGS. 1 to 6 show a first embodiment of the cutting insert of the present invention
  • FIG. 7 shows a first embodiment of the cutting edge replaceable cutting tool of the present invention to which the cutting insert of the first embodiment is attached. Indicates.
  • FIG. 8 shows a state in which the cutting insert is removed from the cutting edge exchangeable cutting tool of the first embodiment.
  • the cutting insert of this embodiment has an insert body 1.
  • the insert body 1 is formed in a substantially parallelogram plate shape by a hard material selected from cemented carbide, cermet, surface-coated cemented carbide, surface-coated cermet, and the like, and includes a pair of parallelogram surfaces 2, A pair of long side surfaces 3 and a pair of short side surfaces 4 are provided.
  • the insert body 1 in this example has a parallelogram-shaped polygonal surface, but the polygonal surface may be rectangular. In that case, both ends of one diagonal may be regarded as obtuse corners, and both ends of the other diagonal may be regarded as acute corners.
  • the pair of long side surfaces 3 have a planar shape parallel to each other, and also extend in parallel with the thickness direction of the insert body 1 (the vertical direction in FIGS. 3 to 6, that is, the central axis C direction described later).
  • the short side surface 4 is partitioned into four square regions 4A, 4B, 4A, 4B by a horizontal line 4C and a vertical line 4D passing through the center of the short side surface 4, as shown in FIG. 4B is a positive surface.
  • the negative surfaces 4 ⁇ / b> A and the positive surfaces 4 ⁇ / b> B are arranged at point-symmetric positions with the center in between. Further, the negative surface 4A and the positive surface 4B are adjacent to each other across the horizontal line 4C or the vertical line 4D.
  • the negative surface 4 ⁇ / b> A and the positive surface 4 ⁇ / b> B are alternately arranged in the thickness direction on the short side 4 on the side continuous with one long side 3 and the side continuous with the other long side 3.
  • the negative surface 4A is disposed on the obtuse corner portion D side of the parallelogram surface 2, that is, on the upper left side and the lower right side in FIG. 4, and has a planar shape extending in parallel with the thickness direction as with the long side surface 3. ing.
  • the positive surface 4B is disposed on the side that is connected to the long side surface 3 at the acute corner portion of the parallelogram surface 2, that is, the upper right side and the lower left side in FIG.
  • the positive surface 4B is an inclined surface that gradually protrudes in the longitudinal direction (vertical direction in FIG. 2) of the insert body 1 as it is separated from the negative surface 4A adjacent in the thickness direction.
  • the positive surface 4B is inclined so as to gradually protrude as it moves away from the negative surface 4A adjacent in the width direction of the insert body 1 (the left-right direction in FIGS. 2 and 4).
  • the positive surface 4B intersects the long side surface 3 at the acute corner portion of the parallelogram surface 2.
  • the intersecting ridge line portions of the long side surface 3 and the short side surface 4 adjacent to each other in the circumferential direction of the insert body 1 are chamfered in a circular arc shape in cross section.
  • the insert body 1 is provided with a mounting hole 5 having a circular cross section around a center line C that connects the centers of the pair of parallelogram surfaces 2 in the thickness direction, and the mounting hole 5 is inserted in the thickness direction. It penetrates the main body 1. As shown in FIG. 6, an annular reduced diameter portion 5 ⁇ / b> A is formed at the center of the mounting hole 5.
  • the cross section of the reduced diameter portion 5A has a flat central portion over a certain width, and both sides of the flat portion have a convex curve shape.
  • the insert body 1 is 180 degrees with respect to a symmetric line extending perpendicularly to the center line C in the center of the insert thickness direction and extending parallel to the long side surface 3 and a symmetric line orthogonal to the center line C. ° It is formed in a rotationally symmetric shape. That is, the insert body 1 has a front / back inversion symmetrical shape. The insert body 1 is also formed in a 180 ° rotationally symmetric shape with respect to the center line C.
  • a main cutting edge 6A is formed on the intersection ridge line portion between the pair of parallelogram surfaces 2 and the pair of long side surfaces 3, that is, the long side ridge portions of the parallelogram surface 2, respectively.
  • sub-cutting edges 6 ⁇ / b> B are formed on the intersecting ridge line portion of the positive surface 4 ⁇ / b> B, that is, the short side ridge portion of the parallelogram surface 2.
  • the acute corner portion of the parallelogram surface 2 where the main cutting edge 6A and the sub cutting edge 6B intersect is chamfered in the above-mentioned circular arc shape at the intersecting ridge line portion between the long side surface 3 and the positive surface 4B.
  • a substantially arcuate corner blade 6C is formed in the portion.
  • the corner blade 6 ⁇ / b> C and the main cutting blade 6 ⁇ / b> A connected to the corner blade 6 ⁇ / b> A are substantially extended over the main cutting blade 6 ⁇ / b> A from the contact point with the auxiliary cutting blade 6 ⁇ / b> B of the corner blade 6 ⁇ / b> C in a side view facing the long side surface 3. It is inclined linearly so as to gradually recede in the thickness direction at a constant inclination angle.
  • the corner cutting edge 6C and the auxiliary cutting edge 6B connected to the corner cutting edge 6B have a convex curve shape with the contact point between the auxiliary cutting edge 6B and the corner cutting edge 6C as the apex as shown in FIG. Has been.
  • intersection ridge line portion between the negative surface 4A and the parallelogram surface 2 connected to the auxiliary cutting edge 6B gradually recedes in the thickness direction toward the obtuse corner portion D, and then before the obtuse corner portion D. It extends substantially perpendicular to the thickness direction.
  • the pair of parallelogram surfaces 2 are formed with a positive rake face 2A that gradually recedes in the thickness direction toward the inside, inside the main cutting edge 6A, the auxiliary cutting edge 6B, and the corner cutting edge 6C. Yes. Further, around the mounting hole 5, a boss portion 2B having a substantially conical surface shape centered on the center line C is formed.
  • a pair of ridges 7 having a ridge part 7A is formed, and the ridge part 7A is an obtuse angle where the corner blade 6C of the parallelogram face 2 is not formed. It extends in the direction of a diagonal line connecting the corner portions D.
  • the slope of the peak portion 7 is used as a contact surface 8, and the contact surface 8 contacts a contacted surface formed on the bottom surface of an insert mounting seat of a blade-tip-exchangeable cutting tool described later. It is possible.
  • the ridge portion 7A of the mountain portion 7 has a convex curved section, and gradually increases in height in the thickness direction at a constant inclination angle from the obtuse corner portion D side toward the boss portion 2B.
  • the ridge portion 7A does not extend exactly along the diagonal line connecting the obtuse corner portions D, and extends closer to the long side surface 3 that intersects the obtuse corner portion D than the diagonal line.
  • the slopes on both sides of the ridge 7 are a first slope having a small area inclined so as to recede in the thickness direction of the insert (that is, to descend) toward the long side surface 3 side, and to the short side surface 4 side.
  • the second inclined surface having a larger area is used as the contact surface 8. .
  • the abutting surface 8 is a direction from the intersection of the boss portion 2B and the ridge portion 7A toward the substantially central portion in the width direction of the short side surface 4 that intersects the obtuse corner portion D in a plan view as shown in FIG.
  • the inclined plane has a maximum inclination along a direction parallel to the ZZ line in FIG.
  • the skirt of the contact surface 8 has a shape in which the distance from the short side surface 4 gradually increases from the obtuse corner portion D side toward the acute corner portion side where the corner blade 6C is formed in plan view. It extends to the vicinity of the main cutting edge 6A connected to 6C.
  • FIG. 6 shows a region between the contact surface 8 and the main cutting edge 6A, a region between the contact surface 8 and the auxiliary cutting blade 6B, and a region between the contact surface 8 and the positive rake face 2A. As shown, after retreating in the thickness direction as it goes inward at a steeper slope than the positive rake face 2A, it smoothly connects to the contact surface 8 via a concave curved surface.
  • a pair of crests 7 having the contact surface 8 as an inclined surface are formed symmetrically with respect to the center line C on one parallelogram surface 2.
  • the virtual extension surface which each extended the contact surface 8 of these peak parts 7 mutually cross
  • only one pair of contact surfaces 8 is formed on one parallelogram surface 2, and the V-shaped included angle formed by the virtual extension surface of the pair of contact surfaces 8 is an obtuse angle.
  • the crossed ridge line L of the pair of contact surfaces 8 is slightly more than the center in the longitudinal direction of the long side surface 3 from the center line C, as shown by a one-dot chain line in FIG. It extends so as to cross obliquely on the side close to the obtuse corner portion D. Since the insert body 1 has a front / back inversion symmetry, the cross ridge line L of the pair of contact surfaces 8 formed on the other parallelogram surface 2 on the opposite side of the parallelogram surface 2 is also the same as above. When viewed from the direction facing the parallelogram surface 2, as shown by a broken line in FIG. 2, the obtuse corner portion D (the back side in FIG. 2) is slightly closer to the center portion in the longitudinal direction of the long side surface 3 from the center line C. It extends so as to cross at an angle.
  • FIG. 7 and FIG. 8 show the blade-tip-exchangeable cutting tool of the first embodiment provided with the above-mentioned cutting insert in a detachable manner.
  • This cutting edge exchange type cutting tool is a cutting edge exchange type cutting tool, particularly an end mill, and has a tool body 11.
  • the tool body 11 is formed of a steel material or the like and has a multi-stage columnar shape centered on the axis O.
  • the rear end side portion (upper right portion in FIG. 7) is a shank portion 11A
  • the tip portion is a cutting edge portion 11B. It is said that.
  • the shank portion 11A is gripped by the main spindle of the machine tool, and the tool main body 11 is sent in the direction intersecting the axis O while being rotated in the tool rotation direction T around the axis O.
  • the workpiece is cut by the cutting blades (the main cutting blade 6A, the sub cutting blade 6B, and the corner blade 6C) of the cutting insert attached to the cutting blade portion 11B.
  • a plurality of (three in the present embodiment) chip pockets 12 are formed at regular intervals in the circumferential direction and open to the front end surface thereof, that is, the front end surface of the tool body 11 and extend to the rear end side. ing. Further, as shown in FIG. 8, on the wall surface facing the tool rotation direction T side of these chip pockets 12, an insert mounting seat 13 to which the cutting insert is attached is opened at the tip surface and the outer peripheral surface of the cutting edge portion 11B. Is formed so as to be recessed one step from the wall surface to the rear side in the tool rotation direction T.
  • the insert mounting seat 13 has a bottom surface 14 facing the tool rotation direction T, a wall surface 15 facing the tool outer peripheral side, and 16 facing the tool tip side.
  • the other parallelogram surface 2 serves as a seating surface on the bottom surface 14.
  • the wall surface 15 rises from the edge of the bottom surface 14 on the inner peripheral side of the tool body 11 toward the tool rotation direction T and continues to the wall surface facing the tool rotation direction T of the chip pocket 12.
  • the wall surface 16 rises from the edge of the bottom surface 14 on the tool rear end side toward the tool rotation direction T and continues to the wall surface facing the tool rotation direction T of the chip pocket 12.
  • a notch 15A is formed in the central portion of the wall surface 15 in the axis O direction.
  • the intersecting ridge line portion between the bottom surface 14 and the wall surfaces 15 and 16 and the intersecting ridge line portion between the wall surfaces 15 and 16 are mainly arranged on the inner peripheral side of the tool main body 11 of the parallelogram surface 2 as the seating surface.
  • a relief having a concave groove shape having a substantially semicircular cross section Notched by the portion 17A.
  • the intersecting ridge line portion between the bottom surface 14 and the distal end surface and the outer peripheral surface of the cutting blade portion 13 is also disposed on the distal end side of the main cutting edge 6A disposed on the tool outer peripheral side of the parallelogram surface 2 which is also a seating surface.
  • a chamfered relief portion 17B is formed.
  • a clamp inserted into the mounting hole 5 from one parallelogram surface 2 side, which is a rake face, with the insert body 1 seated on the insert mounting seat 13 as described above.
  • a screw hole 14A into which the screw 18 is screwed is formed.
  • the insert body 1 is attached to the insert attachment seat 13 when the back surface of the head of the clamp screw 18 screwed into the screw hole 14A presses the reduced diameter portion 5A of the attachment hole 5.
  • the bottom surface 14 is formed with a pair of abutting surfaces 19 on which the pair of abutting surfaces 8 of the parallelogram surface 2 as a seating surface can abut.
  • the two virtual extension surfaces extending the contacted surface 19 intersect at an intersecting ridgeline, and the cross-section is complementary to the cross section of the two virtual extension surfaces extending the paired contact surfaces 8 with the concavities and convexities reversed. It is in shape. Therefore, in this embodiment, the cross section of the virtual extension surface which extended a pair of to-be-contacted surface 19 has comprised V shape.
  • the pair of abutted surfaces 19 form a pair of inclined planes that approach each other as the virtual extension surface thereof approaches the bottom side of the bottom surface 14 (the rear side in the tool rotation direction T).
  • the pair of contacted surfaces 19 When viewed along the intersecting ridgeline, the pair of contacted surfaces 19 extend along a pair of virtual extension surfaces that intersect the V shape formed by the contact surface 8 and the opposite V shape having a substantially equal included angle. ing. Accordingly, only one pair of the contacted surfaces 19 of the bottom surface 14 of the insert mounting seat 13 is provided.
  • the intersecting ridge line where the virtual extension surfaces of the pair of contacted surfaces 19 intersect each other is orthogonal to the center line of the screw hole 14A and when viewed from the tool rotation direction T side facing the bottom surface 14 in the center line direction. Furthermore, it extends toward the rear end side from the center line toward the inner peripheral side of the tool main body 11, and obliquely intersects the wall surface 15 facing the outer peripheral side of the tool main body 11 of the insert mounting seat 13.
  • the intersection angle formed by the intersecting ridge line and the wall surface 15 is a pair of the other parallelogram surfaces 2 on the opposite side opposite to the front and back shown in FIG.
  • the intersecting ridge line L of the contact surface 8 is made equal to the intersecting angle formed with respect to the long side surface 3.
  • the wall surface 15 has a planar shape parallel to the screw hole 14A except for the notch 15A.
  • the cutting insert is oriented in the tool rotation direction T with one parallelogram surface 2 of the insert body 1 as a rake face, and one long side surface 3 as described above. Is directed to the outer peripheral side of the tool body 11, one short side surface 4 is directed to the tip side of the tool body 11, and the other parallelogram surface 2 is seated on the bottom surface 14. Accordingly, the pair of contact surfaces 8 of the other parallelogram surface 2 are brought into contact with the pair of contact surfaces 19 of the bottom surface 14. In this state, the insert body 1 has a direction along the intersecting ridge line L of the pair of contact surfaces 8 in the other parallelogram surface 2 in a state where the center line C is parallel to the center line of the screw hole 14A. Only movement to is allowed and restrained in other directions.
  • the long side surface 3 has a planar shape parallel to the center line of the center line C, and the wall surface 15 has a planar shape parallel to the center line of the screw hole 14A. Due to the reasons (1) and (2) above, the long side surface 3 can come into contact with the entire surface of the wall surface 15, and the insert body 1 can be positioned stably.
  • the long side surface 3 is used as a contact portion and the wall surface 15 is used as a contact portion, and the cross ridge line L on the parallelogram surface 2 side serving as a seating surface extends in the extending direction.
  • An abutting portion is formed on the long side surface 3 facing in one direction, and the abutting portion can abut on an abutted portion formed on the wall surface 15 rising from the bottom surface 14 of the insert mounting seat 13.
  • the center line C of the mounting hole 5 of the insert body 1 is slightly decentered toward the outer periphery of the tool tip with respect to the center line of the screw hole 14A. Therefore, when the clamp screw 18 is screwed into the screw hole 14 ⁇ / b> A as described above, a portion of the reduced diameter portion 5 ⁇ / b> A of the attachment hole 5 that is located on the inner peripheral side of the rear end of the tool hole 11 by the back surface of the head of the clamp screw 18. Pressed. Accordingly, the insert body 1 is detachably fixed to the insert mounting seat 13 so as to be pressed against the bottom surface 14 by the clamp screw 18 and also against the wall surface 15.
  • only one insert mounting seat 13 is formed in the cutting edge portion 11B at the tip of the tool body 11 in the direction of the axis O.
  • the present invention is not limited to this, and one or a plurality of insert mounting seats 13 can be formed on the rear end side of the insert mounting seat 13 to increase the number of blades of the tool. Even in such a case, according to the cutting insert and the cutting edge replacement type cutting tool, it is not necessary to form the wall surface 16 on the rear end side of the insert mounting seat 13 as described above.
  • the mounting seat 13 can be formed in close proximity.
  • the insert mounting seat 13 adjacent to the rear end side in the direction of the axis O is shifted to the rear side in the tool rotation direction T by the thickness of the insert body 1 to be mounted on the row of insert mounting seats 13. It is also possible to form a cutting blade row in which the rotation trajectory of the main cutting blade 6A is continuous by the cutting insert. For this reason, it is possible to provide a large number of such cutting blade rows in one tool body 11, and it is possible to improve the cutting efficiency.
  • the insert body 1 has a reverse-inverted symmetrical shape, and when the main cutting edge 6A, the auxiliary cutting edge 6B, and the corner edge 6C are worn, the insert body 1 is reversed. Then, by reattaching to the insert mounting seat 13, the one parallelogram surface 2 that was the rake face is used as a seating surface, and the other parallelogram surface 2 that is the seating surface is used as the rake face.
  • the main cutting edge 6A, the auxiliary cutting edge 6B, and the corner edge 6C formed on the side ridge portion of the other parallelogram surface 2 can be used.
  • the new long side surface 3 positioned on the inner peripheral side of the tool body 11 serves as a contact portion with respect to the parallelogram surface 2 which is a new seating surface. It is made to contact
  • the insert body 1 is formed to be 180 ° rotationally symmetric with respect to the center line C, and by rotating 180 ° around the center line C, one parallelogram surface 2 remains as a rake face,
  • Each pair of main cutting edge 6A, sub cutting edge 6B, and corner cutting edge 6C formed in the crossed ridge line portion and the acute corner portion of the pair of long and short side surfaces 3 and 4 can be used. That is, in the cutting insert of this embodiment, the main cutting edge 6A, the auxiliary cutting edge 6B, and the corner cutting edge 6C can be used four times in total.
  • the long side surface 3 opposite to the tip in the direction in which the intersecting ridge line L extends serves as a contact portion of the insert mounting seat 13. It can be brought into contact with the wall surface 15 which is a contacted portion.
  • the same long side surface 3 becomes the contact portion. That is, of the pair of front and back parallelogram surfaces 2, one long side surface 3 that faces one direction of the intersecting ridge line L direction in one parallelogram surface 2 and one other parallelogram surface 2. One long side surface 3 that faces the other direction among all the intersecting ridge lines L is the one long side surface 3. Then, a contact portion is formed on the long side surface 3.
  • FIG. 9 to 14 show a second embodiment of the cutting insert of the present invention.
  • FIG. 15 shows a second embodiment of the cutting edge-exchangeable cutting tool to which the cutting insert of the second embodiment is attached.
  • FIG. 16 shows a state in which the cutting insert has been removed from the cutting edge-exchangeable cutting tool of the second embodiment.
  • the cutting insert and the cutting edge-exchangeable cutting tool of the second embodiment have an insert body 21, and the pair of abutting surfaces of the insert body 21 and the pair of abutting surfaces of the bottom surface of the insert mounting seat are the first. It is different from the embodiment. Since these points are substantially the same as those in the first embodiment, common elements are assigned the same reference numerals and description thereof is omitted.
  • a pair of contact surfaces 22 are formed on the pair of parallelogram surfaces 2 of the insert body 21, and the virtual extension surfaces of these contact surfaces 22 intersect with each other so as to form a V shape. It has been. That is, the contact surface 22 is formed to extend in the V-shaped direction having a concave cross section. Furthermore, the intersection ridge line L of the virtual extension surface of the contact surface 22 is arranged so as to obliquely intersect the short side surface 4 of the insert body 21 as shown in FIG. 10 when viewed from the center line C direction. Yes.
  • a valley portion 23 having a V-shaped cross section is formed except for the boss portion 2 ⁇ / b> B around the mounting hole 5. Is formed. These troughs 23 once protrude in the insert thickness direction with respect to the positive rake face 2A located inside the main cutting edge 6A, the sub cutting edge 6B, and the corner cutting edge 6C, and then from the corner cutting edge 6C sides on both sides. As it goes substantially to the diagonal line side, it has a V shape with a recessed section so that it gradually recedes (lowers) in the thickness direction.
  • a pair of slopes constituting the valley portion 23 is a pair of contact surfaces 22 in the present embodiment. The angle between the pair of contact surfaces 22 having a V-shaped cross section is an obtuse angle, as in the first embodiment.
  • the bottom line of the valley 23, that is, the intersecting ridge line L of the virtual extension surface of the pair of contact surfaces 22 is a diagonal line connecting obtuse corners, as shown by a one-dot chain line in FIG.
  • the intersecting ridge line L intersects the negative surface 4A of the short side surface 4 intersecting the parallelogram surface 2 obliquely. That is, the inclination angle formed by the intersecting ridge line L and the insert longitudinal direction is smaller than the inclination angle formed by the diagonal line connecting the obtuse corner and the insert longitudinal direction.
  • FIG. 15 and FIG. 16 show the cutting edge exchangeable cutting tool of the second embodiment to which the cutting insert of the second embodiment is attached.
  • An insert mounting seat 13 is formed at the tip of the cutting edge portion 11B of the tool body 11, and a bottom surface 14 of the insert mounting seat 13 includes a pair of abutted surfaces 24.
  • the virtual extension surfaces that extend the contacted surfaces 24 that form a pair intersect with the virtual extension surfaces that extend the contact surface 22 that forms a pair in an inverted V-shaped cross-section with reverse concavities and convexities.
  • the included angle between the virtual extended surfaces extending the paired contact surfaces 24 is substantially equal to the included angle between the virtual extended surfaces extending the paired contact surfaces 22.
  • the pair of abutted surfaces 24 are complementary to the pair of abutting surfaces 22.
  • the intersecting ridge line where the virtual extension surfaces of the pair of contacted surfaces 24 intersect each other is orthogonal to the center line of the screw hole 14A.
  • this intersecting ridge line reaches the intersection line between the virtual extension surfaces of the wall surface 15 facing the tool outer peripheral side of the insert mounting seat 13 and the wall surface 16 facing the tip side.
  • it is arranged so as to obliquely intersect the extended surface of the wall surface 16.
  • the intersection angle between the intersection ridge line and the extension surface of the wall surface 16 is the intersection ridge line L between the extension surface of the negative surface 4B of the short side surface 4 and the contact surface 22 when the insert body 21 is viewed along the central axis C. Is substantially equal to the crossing angle formed by.
  • the insert main body 21 is formed on the insert mounting seat 13 with one parallelogram surface 2 as a rake face and the other parallelogram surface 2 as a seating surface as in the first embodiment.
  • the pair of contact surfaces 22 of the other parallelogram surface 2 contacts the pair of contact surfaces 24 of the bottom surface 14.
  • the insert body 21 is only allowed to move in the direction of the intersecting ridge line L on the other parallelogram surface 2 and is restrained in the other direction. Further, when the insert main body 21 is moved toward the short side surface 4 directed toward the rear end side of the tool, the short side surface 4 is brought into contact with the wall surface 16 of the insert mounting seat 13 and positioned.
  • the wall surface 16 is a contacted portion, and the other short side facing the one side in the intersecting ridge line L direction with respect to the parallelogram surface 2 as the seating surface of the insert body 21.
  • a contact portion that can contact the contacted portion (wall surface 16) is formed only on the side surface 4. More specifically, the wall surface 16 has a planar shape parallel to the screw hole 14 ⁇ / b> A, and is parallel to the center line C that intersects one parallelogram surface 2 of the other short side surface 4 of the insert body 21.
  • the negative surface 4 ⁇ / b> A is a contact portion that can partially contact the wall surface 16.
  • the wall surface 15 facing the outer peripheral side of the tool body 11 of the insert mounting seat 13 is not involved in the mounting of the cutting insert, contrary to the first embodiment. Therefore, by increasing the chip pocket 12 on the inner peripheral side of the insert mounting seat 13, even when the wall surface 15 is reduced or the wall surface 15 is eliminated in some cases, the mounting stability of the insert body 21 is impaired. There is nothing. For this reason, improvement of chip discharge
  • the cutting edge replaceable cutting tool has a very small diameter, for example, if the outer diameter of the tip of the tool body is about twice the size in the width direction of the insert body, usually one insert is attached. Only the seat can be formed.
  • the wall surface 15 facing the outer peripheral side of the tool body 11 may not be provided as described above, two or more are provided at the tip of the tool body 11.
  • the plurality of insert mounting seats 13 can be formed so that their inner peripheral sides communicate with each other, and a cutting insert can be attached to each. Therefore, even in such an extremely small diameter cutting edge exchangeable cutting tool, it is possible to increase the number of blades and improve the cutting efficiency.
  • FIGS. 17 to 22 show a third embodiment of the cutting insert of the present invention.
  • FIG. 23 shows a third embodiment of the cutting edge replaceable cutting tool of the present invention to which the cutting insert of the third embodiment is attached
  • FIG. 24 shows the cutting insert in the cutting edge replaceable cutting tool of the third embodiment. Shows the state where is removed.
  • the cutting insert and cutting edge-exchangeable cutting tool of the third embodiment are different in the short side surface 32 of the insert body 31, the contact portion formed on the short side surface 32, and the contacted portion of the insert mounting seat 13. Except for this, it is substantially the same as in the second embodiment, so common elements are assigned the same reference numerals and description thereof is omitted.
  • a groove 33 having a concave cross section such as a concave arc as shown in FIG. 18 is formed in the center in the width direction of the pair of short side surfaces 32 of the insert main body 31. These concave grooves 33 are formed along the thickness direction across the pair of parallelogram surfaces 2 and serve as contact portions.
  • the wall surface 16 facing the tool tip side is a contacted portion of the insert mounting seat 13, and a cross section perpendicular to the center line of the screw hole 14A of the wall surface 16 Has a convex curve shape such as a convex arc with which the bottom surface of the concave groove 33 can abut.
  • the radius of curvature of the convex curve formed by the cross section of the wall surface 16 is smaller than the radius of curvature of the concave curve formed by the cross section of the concave groove 33.
  • the part of the width direction both sides of the said groove 33 among the short side surfaces 32 of the insert main body 31 is an intersection ridgeline part with the parallelogram surface 2 of the side in which the subcutting-blade 6B is formed in the said thickness direction, respectively.
  • the positive surface 4B protrudes entirely in the longitudinal direction of the insert as it goes to.
  • the pair of abutting surfaces 22 of the parallelogram surface 2 serving as the seating surface is replaced with the pair of abutting surfaces of the bottom surface 14 of the insert mounting seat 13.
  • the insert body 31 is seated against the surface 23. Further, when the insert main body 31 is moved to the short side surface 32 side facing the tool rear end side, the concave groove 33 formed in the short side surface 32 accommodates the wall surface 16 having a convex curved section and is recessed into the wall surface 16. The bottom surface of the groove 33 is brought into contact.
  • the chip pocket 12 on the inner peripheral side of the insert mounting seat 13 is enlarged as in the second embodiment to improve the chip discharging property, and in the circumferential direction of the tool body 11.
  • Many insert mounting seats 13 can be formed to increase the number of blades, and the cutting efficiency can be improved.
  • the contact portions of the insert bodies 1 and 21, that is, the negative surface 4 A of the long side surface 3 and the short side surface 4, and the contacted portions of the insert mounting seat 13, that is, the wall surface 15 and the wall surface 16. are brought into contact with each other so as to be in surface contact with each other. Therefore, if the insert main bodies 1 and 21 and the insert mounting seat 13 are molded with high accuracy, the contact portion can be brought into surface contact with the contacted portion, but if the molding accuracy is not high, the contact portion The part may contact the contacted part by line contact or point contact.
  • the concave groove 33 having a concave curved section that is a contact portion is brought into contact with the wall 16 having a convex curved section that is a contacted portion.
  • the contact portion is brought into contact with the contacted portion.
  • the insert main body 31 can be more reliably supported on the insert mounting seat 13 and the mounting stability of the cutting insert can be further improved.
  • a concave groove 33 having a concave cross-sectional shape is formed on the short side surface 32, and the wall surface 16 to be the abutted portion is formed as a convex convex section
  • a concave groove is formed on the long side surface 3 and the projection shape on which the concave groove can abut.
  • the abutted portion may be formed on the wall surface 15.
  • the main cutting edge 6A of the insert main body 1 is divided by the concave groove. Therefore, when the contact portion is formed on the short side surface 32 as in the third embodiment, it is desirable that the concave groove 33 is formed on the short side surface 32.
  • the pair of contact surfaces 8 are respectively formed along a pair of virtual extension surfaces intersecting the inverted V-shaped section, and the pair of contacted surfaces 19 are a pair intersecting the V-shaped section. Each of them is formed along the virtual extension surface.
  • the pair of contact surfaces 22 are formed along a pair of virtual extension surfaces intersecting the V-shaped cross section, and the pair of contacted surfaces 24 have an inverted V-shaped cross section. They were formed along a pair of intersecting virtual extended surfaces, and the included angles of these V-shaped and inverted V-shaped were substantially equal to each other.
  • the V-shaped sandwich angle may be slightly smaller than the inverted V-shaped sandwich angle in any of the first to third embodiments.
  • the cutting insert can be stably inserted even if the molding accuracy is not high. Can be seated and attached.
  • the short side surface 4 is not involved in the mounting of the cutting insert.
  • the negative surface of the short side surface 4 is in contact with the wall surface 16 that is the contacted portion. Since it is the surface 4A or the concave groove 33, in these first to third embodiments, the positive surface 4B of the short side surfaces 4 and 32 does not participate in the insert mounting. Therefore, in the first to third embodiments, the minor cutting edge 6B and the corner cutting edge 6C formed at the intersecting ridge line portion between the positive surface 4B of the short side surfaces 4 and 32 and the pair of parallelogram surfaces 2. Even if the shapes are different from each other, they can be mounted on the same insert mounting seat 13 as they are.
  • the cutting insert attached to the most advanced insert mounting seat 13 is, for example, the above-described positive surface 4B. It can also be mounted as a cutting insert in which a corner blade 6C having a large radius is formed by increasing the protruding amount in the longitudinal direction. That is, since a plurality of types of cutting inserts having corner radii 6C having different radii can be attached to one tool body 11, one tool body can be formed even when corners having different radii are formed during shoulder cutting. 11 can cope with this.
  • a large chip pocket can be secured on the tool body rear end side or inner peripheral side of the insert mounting seat, and the chip dischargeability can be improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

L'invention porte sur une plaquette de coupe. Selon l'invention, une plaquette de coupe est équipée d'un corps de plaquette (1) fait d'une plaque polygonale et contenant une paire de surfaces polygonales (2) et une multitude de facettes latérales (3,4). Le corps de plaquette (1) est façonné de manière à posséder une symétrie d'inversion avant-arrière, une paire de surfaces de contact horizontales (8) est formée sur chaque surface polygonale (2), et chaque surface de contact (8) peut venir en butée contre une surface d'une paire de surfaces, devant être mises en contact (19), formées sur une face inférieure (14) d'une monture de plaquette (13). Deux surfaces étendues imaginaires qui partent de la paire de surfaces de contact (8) se coupent selon une forme de section en V inversé au niveau d'une ligne de crête d'intersection (1). Parmi les facettes latérales du corps de plaquette (1), des parties de butée sont formées sur les facettes latérales longues (3) qui sont dirigées vers l'une des deux directions dans lesquelles la ligne de crête (L) s'étend et qui peuvent venir en butée contre des parties, devant être mises en butée, formées sur une surface de paroi (15) de la monture de plaquette.
PCT/JP2011/058119 2010-03-30 2011-03-30 Plaquette de coupe et outil de coupe possédant un point de coupe interchangeable WO2011122676A1 (fr)

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WO2021193705A1 (fr) * 2020-03-25 2021-09-30 京セラ株式会社 Outil rotatif et procédé de fabrication de pièces coupées
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US20140234037A1 (en) * 2011-10-04 2014-08-21 Mitsubishi Materials Corporation Cutting insert and indexable insert-type cutting tool
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US10029319B2 (en) 2011-10-31 2018-07-24 Kyocera Corporation Cutting insert, cutting tool, and method of producing machined product using the same
JPWO2013065347A1 (ja) * 2011-10-31 2015-04-02 京セラ株式会社 切削インサートおよび切削工具、並びにそれを用いた切削加工物の製造方法
WO2013065347A1 (fr) * 2011-10-31 2013-05-10 京セラ株式会社 Insert tranchant, outil tranchant et procédé de fabrication de pièce usinée tranchante les utilisant
US9327354B2 (en) 2011-10-31 2016-05-03 Kyocera Corporation Cutting insert, cutting tool, and method of producing machined product using the same
WO2013104506A1 (fr) * 2012-01-13 2013-07-18 Seco Tools Ab Plaquette de coupe avec surface d'appui inclinée, porte-outil avec surface de butée inclinée, et outil de coupe
US9138815B2 (en) 2012-01-13 2015-09-22 Seco Tools Ab Cutting insert with angled supporting surface, toolholder with angled abutment surface, and cutting tool
EP2614907A1 (fr) * 2012-01-13 2013-07-17 Seco Tools Ab Insert de découpe avec surface de support en biais, porte-outil avec surface de butée en biais et outil de découpe
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