WO2006073233A1 - Plaquette d'outil de coupe - Google Patents

Plaquette d'outil de coupe Download PDF

Info

Publication number
WO2006073233A1
WO2006073233A1 PCT/KR2005/003963 KR2005003963W WO2006073233A1 WO 2006073233 A1 WO2006073233 A1 WO 2006073233A1 KR 2005003963 W KR2005003963 W KR 2005003963W WO 2006073233 A1 WO2006073233 A1 WO 2006073233A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
cutting tool
insert
edges
crack
Prior art date
Application number
PCT/KR2005/003963
Other languages
English (en)
Inventor
Yang-Gu Lee
Original Assignee
Yang-Gu Lee
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 Yang-Gu Lee filed Critical Yang-Gu Lee
Publication of WO2006073233A1 publication Critical patent/WO2006073233A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1409—Covers for manholes or the like; Frames for covers adjustable in height or inclination
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/12—Side or flank surfaces
    • B23B2200/128—Side or flank surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/28—Titanium carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/32—Titanium carbide nitride (TiCN)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
    • B23B2224/36—Titanium nitride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/11—Height being adjustable

Definitions

  • the present invention relates to a cutting tool insert, and more particularly, to a cutting tool insert with an improved structure by which a lifetime of the cutting tool insert and a lifetime of a cutting tool holder to be fitted with the cutting tool insert can be elongated.
  • FIG. 1 is a perspective view schematically illustrating a conventional cutting tool insert.
  • the conventional cutting tool insert 1 is generally coupled to a cutting tool holder 10 in a posture-changeable and interchangeable manner and is used to cut a workpiece(not shown). Such a cutting tool insert 1 is used for a milling work and a turning work, which is shown in Fig. 1.
  • the conventional cutting tool insert 1 has a first surface 2 and a second surface 3 with a quadrangular shape which are disposed to face directions opposite to each other and four third surfaces 4 which are disposed along the edges of the first surface 2 and the second surface 3.
  • Cutting edges 5 are formed at four edges formed by the first surface 2 and the third surfaces 4, respectively, and cutting edges 6 are also formed at four edges formed by the second surface 3 and the third surfaces 4, respectively.
  • the respective cutting edges 5 and 6 are formed all over the edges. In this way, the cutting edges 5 and 6 are formed at all the eight edges of the cutting tool insert 1 and all the eight cutting edges 5 and 6 can be used to cut a workpiece.
  • the cutting tool insert 1 is fixed to the cutting tool holder 10 and then any one cutting edge 5 of the eight cutting edges 5 and 6 is used to cut a workpiece (not shown).
  • a cutting work of the workpiece is affected by physical properties of the workpiece and the insert and cutting conditions such as cutting speed, feedrate, cutting depth, and lubricant condition. Accordingly, when the physical properties of the workpiece and the insert and the cutting conditions are not properly maintained, a chipping phenomenon of damaging the cutting edge occurs.
  • the insert 1 is detached from the holder 10 and is turned or turned over and attached again to the holder for use so that the cutting work can be performed by the use of any one of the cutting edges 5 and 6 other than the damaged cutting edge 5.
  • the chipping occurs in the cutting edge 5 as described above, cracks generated due to the chipping are spread to the other cutting edges 6 positioned at the opposite side of the damaged cutting edge 5 and thus the other cutting edges 6 not used are often damaged.
  • the number of usable cutting edges of the insert 1 decreases unlike the original intention, thereby reducing the lifetime of the insert.
  • the present invention is contrived to solve the above-mentioned problems. It is an object of the present invention to provide a cutting tool insert with an improved structure by which a lifetime of the cutting tool insert and a lifetime of a cutting tool holder to be fitted with the cutting tool insert can be elongated by preventing cracks generated in a cutting edge from being spread to other cutting edge formed at the opposite side thereof.
  • FIG. 1 is a perspective view schematically illustrating a conventional cutting tool insert
  • FIG. 2 is a perspective view schematically illustrating a cutting tool insert according to an embodiment of the presentinvention
  • Fig. 3 is a plan view of the cutting tool insert shown in Fig. 2;
  • Fig. 4 is a cross-sectional view taken along Line IV-IV of Fig. 2;
  • FIG. 5 is a perspective view schematically illustrating a cutting tool insert according to another embodiment of the present invention.
  • Fig. 6 is a cross-sectional view taken along Line VI-VI of Fig. 5.
  • a cutting tool insert coupled to a cutting tool holder foruse, the cutting tool insert comprising an insert body which has a first surface and a second surface with a polygonal shape equal to each other which are disposed to face directions opposite to each other in the thickness direction of the insert body and third surfaces disposed between the first surface and the second surface along the edges of the first surface and thesecond surface; and a cutting edge which is formed on at least one edge of the edges formed by the first surface and the third surfaces and which serves to cut a workpiece, wherein a crack-spread preventing groove formed to be recessed from the third surfaces is provided in the third surfaces forming the edge, which the cutting edge is formed on, along with the first surface, so as to prevent cracks generated in the cutting edge due to a chipping from being spread to the edges formed by the second surface and the third surfaces when the chipping occurs in the cutting edge during cutting the workpiece with the cutting edge.
  • FIG. 2 is a perspective view schematically illustrating a cutting tool insert according to an embodiment of the present invention
  • Fig. 3 is a plan view of the cutting tool insert shown in Fig. 2
  • Fig. 4 is a cross-sectional view taken along Line IV-IV of Fig. 2.
  • a cutting tool insert 100 is coupled to a cutting tool holder 10 and is used to cut a workpiece, similar to the conventional cutting tool insert 1 described with reference to Fig. 1.
  • the cutting tool insert 100 has an insert body 20 and cutting edges 30 and 31.
  • the insert body 20 is made of a material such a shigh speed steel, hard metal, ceramics, cubic boron nitride (CBN), diamond, and cermet.
  • the insert body 20 has a first surface 21, a second surface 22, and a third surface 23.
  • the first surface 21 and the second surface 22 have the same polygonal shape and the same size.
  • the first surface 21 and the second surface 22 are disposed to face directions opposite to each other in the thickness direction t of the insert body 20.
  • the third surfaces 23 are disposed between the first surface 21 and the second surface 22 along the edges of the first surface21 and the second surface 22. That is, four third surfaces 23 having a rectangular shape are formed as shown in Fig. 2.
  • the cutting edges 30 and 31 serve to cut a workpiece (not shown). The cutting edge
  • the cutting edge 30 may be formed on at least one edge of the edges formed by the first surface 21 and the third surfaces 23.
  • the cutting edge 30 is provided on the entire edges formed by the first surface 21 and the third surfaces 23.
  • the cutting edges 30 and 31 may be formed on at least one edge of the edges formed by the second surface 22 and the third surfaces 23.
  • the cutting edges 30 and 31 are provided on the entire edges formed by the second surface 22 and the third surfaces 23.
  • the cutting edges 30 and 31 are formed all overthe whole length of the respective edges on which the cutting edges 30 and 31 are formed. That is, the cutting edges are provided all over the whole length of the edges.
  • the cutting tool insert 100 further includes a crack-spread preventing groove 40 for preventing cracks generated in the cutting edges 30 and 31 due to a chipping from being spread to the other cutting edges 31 and 30 formed at the sides opposite to the cutting edges 30 and 31 in the thickness direction t of the insert body 20, when the chipping occurs in the cutting edges 30 and 31 during cutting the workpiece with the cutting edges 30 and 31.
  • the crack-spread preventing groove 40 serves to prevent the cracks from being spread to the edges formed by the second surface 22 and the third surfaces 23, that is, to the other cutting edges 31.
  • the crack-spread preventing groove 40 is formed in the third surfaces 23 forming the edges, which the cutting edges 30 are formed on, along with the first surface 21 to be recessed from the third surfaces 23.
  • the crack-spread preventing groove 40 is formed in the entire four third surfaces 23.
  • Two crack-spread preventing grooves 40 are formed in the respective third surfaces 23 in the thickness direction t of the insert body 20, as shown in Fig. 2.
  • the number of crack-spread preventing grooves formed in the thickness direction t becomes larger, it is more advantageous for the prevention of spread of the cracks generated due to the chipping, but the strength for supporting a cutting portion of the workpiece during the cutting work becomes smaller, thereby reducing the lifetime of the insert 100. Accordingly, it is preferable that the number of crack-spread preventing grooves 40 is set properly in consideration of the cutting conditions or the like.
  • the crack-spread preventing grooves 40 have a curved surface.
  • the width w is smaller than 3% of the thickness of the insert body 20, it is not sufficient for preventing the cracks generated due to the chipping occurring in the cutting edges 30 and 31 from being spread to the other cutting edges 31 and 30 opposite to the cutting edges 30 and 31 in which the chipping occurs.
  • the width w is greater than 50% of the thickness ofthe insert body 20, it is advantageous for preventing the spread of cracks but the strength for supporting the cutting portion of the workpiece during the cutting work decreases, thereby reducing the lifetime of the insert 100.
  • the depth d is smaller than 5% ofthe diameter of the inscribed circle of the insert body 20, it is not sufficient for preventing the cracks generated due to the chipping occurring in the cutting edges 30 and 31 from being spread to the other cutting edges 31 and 30 opposite to the cutting edges 30 and 31 in which the chipping occurs.
  • the depth d is greater than 30% of the diameter of the inscribed circle of the insert body 20, it is advantageous for preventing the spread of cracks but the strength for supporting the cutting portion of the workpiece during the cutting work decreases, thereby reducing the lifetime of the insert 100.
  • the cutting tool insert 100 is fixed to the cutting tool holder 10 and one cutting edge 30 of the eight cutting edges 30 and 31 is used for cutting the workpiece.
  • the hipping phenomenon that the cutting edge 30 cutting the workpiece is damaged often occurs during the cutting work, as described with reference to the related art.
  • the cracks generated in the cutting edge 30 are spread to other cutting edges 31 formed at the side opposite to the cutting edge 30 in the thickness direction t. While the cracks are spread, the cracks approaches the crack- spread preventing groove 40 and are rapidly spread to the groove 40 as indicated by a dotted line in Fig. 4.
  • a portion f including the cutting edge 30 is separated from the insert 100.
  • four grooves having a rectangular section (6mm x 4mm) are formed in the outer circumference of the workpiece in the longitudinal direction and the four grooves are disposed in the circumferential direction at regular intervals.
  • the four grooves serve to impose an impact on the inserts during the cutting work.
  • the cutting speed V is 100 m/min
  • the feed rate f is 0.2 mm/rev
  • the cutting depth d is 1.5 mm
  • the width of the crack-spread preventing groove is set proper and the average time in use of the cutting edge is not greatly different from that of the conventional insert, while the possibility that other cutting edges formed on the side opposite to the cutting edge be damaged due to the chipping is remarkably reduced.
  • the second insert since the width of the crack-spread preventing groove is greater than that of the first insert, the second insert is advantageous in that the other cutting edges formed on the opposite side of the cutting edge are not damaged due to the chipping.
  • the width of the crack-spread preventing groove is too great and thus the strength for supporting the cutting portion of the workpiece during the cutting work is reduced, the average time in use of the cutting edge is remarkably reduced compared with the conventional insert and the first insert.
  • Table 1 when the crack-spread preventing groove is formed with a proper size like the first insert, it is possible to remarkably reduce the damage of the cutting edges formed on the opposite side of the cutting edge due to the chipping occurring during the cutting work, thereby elongating the lifetime of the insert in comparison with the conventional insert.
  • an insert body 50 includes an insert body 51 and a coating layer 52 formed on the outer surface of the insert body 51.
  • the coating layer 52 serves to improve a wear resistance of the cutting tool insert 200 and is made of a material such as TiC, TiN, and TiCN by the use of a chemical vapor deposition method or a physical vapor deposition method.
  • the coating layer 52 has a thickness of 3 ⁇ m to 20 ⁇ m. Here, when the thickness of the coating layer 52 is less than 3 ⁇ m , it is difficult to improve the wear resistance of the cutting tool insert 200.
  • a crack-spread preventing groove 60 is formed by a portion not coated with the coating layer 52. That is, the entire outer surface of the insert body 51 other than the portion exposed to the groove 60 is coated with the coating layer 52.
  • the crack-spread preventing groove 60 is formed only by the portion not coated with the coating layer 52, but a groove may be further formed in the surface of the insert body 51 not coated with the coating layer to be recessed toward the center of the insert body 51, so that the crack-spread preventing groove includes the portion not coated with the coating layer and the groove formed in the insert body.
  • the function of the crack-spread preventing groove 60 is similar to that of the crack-spread preventing groove 40 described above, and thus its detailed description will be omitted.
  • the number of crack- spread preventing grooves formed in the third surfaces may be one or three or more.
  • the cutting edges are formed allover the whole length of the edges in the above-mentioned embodiments, the cutting edges may be formed only on a part of the respective edges.
  • the crack-spread preventing grooves are formed in the entire third surfaces in the above-mentioned embodiments, the crack-spread preventing grooves may be formed only in a partof the third surfaces.
  • the third surface is formed in a plane in the above-mentioned embodiments, the third surface may be formed in a curved surface or a bent surface.
  • the cutting edges are formed on the entire edges formed by the first surface and the third surfaces and the entire edges formed by the second surface and the third surfaces in the above-mentioned embodiments, the cutting edges may be formed only on the entire edges formed by the first surface and the third surfaces.
  • the cutting tool insert in which the first surface and the second surface have the same size is used for a turning work
  • the cutting tool insert may be constructed so that the first surface and the second surface have different sizes and may be used for other cutting works such as a milling work.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

La présente invention concerne une plaquette amovible s'utilisant couplée à un porte-outil pour outil de coupe. Cette plaquette comprend un corps définissant deux premières facettes, avec une troisième facette entre les deux premières, un bord de coupe étant formé sur au moins un bord des bords formés par la première et la troisième facette. Une rainure empêchant l'extension des fissures est formée de façon à constituer à partir de la troisième facette un évidement dans la troisième facette formant le bord sur lequel est formé le bord de coupe, en même temps que la première facette, de façon à empêcher que les fissures générées dans le bord de coupe en raison d'une production de copeau, ne s'étende jusqu'aux bords formés par la deuxième et la troisième facette lorsque la formation du copeau se produit dans le bord de coupe pendant la coupe de la pièce avec le bord de coupe.
PCT/KR2005/003963 2005-01-03 2005-11-23 Plaquette d'outil de coupe WO2006073233A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0000071 2005-01-03
KR1020050000071A KR100655639B1 (ko) 2005-01-03 2005-01-03 절삭공구용 인서트

Publications (1)

Publication Number Publication Date
WO2006073233A1 true WO2006073233A1 (fr) 2006-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/003963 WO2006073233A1 (fr) 2005-01-03 2005-11-23 Plaquette d'outil de coupe

Country Status (2)

Country Link
KR (1) KR100655639B1 (fr)
WO (1) WO2006073233A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018061355A1 (fr) * 2016-09-29 2018-04-05 住友電工ハードメタル株式会社 Outil de coupe
CN110480030A (zh) * 2018-05-15 2019-11-22 西安泰富西玛电机有限公司 一种电机机座车削用双头刀具及采用该刀具加工电机机座的方法
US11141801B2 (en) * 2014-04-23 2021-10-12 Korloy Inc. Cutting tool having partially-removed film formed thereon
US11376675B2 (en) * 2014-04-23 2022-07-05 Korloy Inc. Cutting tool having partially-removed film formed thereon

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113913729B (zh) * 2021-10-09 2022-11-22 阳江市高功率激光应用实验室有限公司 一种刀刃强化方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016848A1 (fr) * 1993-01-27 1994-08-04 Sandvik Ab Insert coupant a surface de depouille vrillee helicoidale, et a evidement contigu
WO1995025618A1 (fr) * 1994-03-21 1995-09-28 Iscar Ltd. Piece rapportee de coupe
WO1998013528A1 (fr) * 1996-09-26 1998-04-02 Kennametal Inc. Plaquette de coupe rapportee et son procede de fabrication
KR200291607Y1 (ko) * 2002-06-29 2002-10-11 김영성 여유각이 형성된 절삭공구의 네가티브 인서트 팁
WO2004041463A2 (fr) * 2002-11-04 2004-05-21 Kennametal Inc. Procede et appareil de pressage de trou transversal afin de produire des inserts de decoupe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016848A1 (fr) * 1993-01-27 1994-08-04 Sandvik Ab Insert coupant a surface de depouille vrillee helicoidale, et a evidement contigu
WO1995025618A1 (fr) * 1994-03-21 1995-09-28 Iscar Ltd. Piece rapportee de coupe
WO1998013528A1 (fr) * 1996-09-26 1998-04-02 Kennametal Inc. Plaquette de coupe rapportee et son procede de fabrication
KR200291607Y1 (ko) * 2002-06-29 2002-10-11 김영성 여유각이 형성된 절삭공구의 네가티브 인서트 팁
WO2004041463A2 (fr) * 2002-11-04 2004-05-21 Kennametal Inc. Procede et appareil de pressage de trou transversal afin de produire des inserts de decoupe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11141801B2 (en) * 2014-04-23 2021-10-12 Korloy Inc. Cutting tool having partially-removed film formed thereon
US11376675B2 (en) * 2014-04-23 2022-07-05 Korloy Inc. Cutting tool having partially-removed film formed thereon
WO2018061355A1 (fr) * 2016-09-29 2018-04-05 住友電工ハードメタル株式会社 Outil de coupe
CN110480030A (zh) * 2018-05-15 2019-11-22 西安泰富西玛电机有限公司 一种电机机座车削用双头刀具及采用该刀具加工电机机座的方法
CN110480030B (zh) * 2018-05-15 2023-08-11 西安西玛电机有限公司 一种电机机座车削用双头刀具及采用该刀具加工电机机座的方法

Also Published As

Publication number Publication date
KR20060079627A (ko) 2006-07-06
KR100655639B1 (ko) 2006-12-11

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