WO2008093931A1 - Insert de coupe - Google Patents

Insert de coupe Download PDF

Info

Publication number
WO2008093931A1
WO2008093931A1 PCT/KR2007/006569 KR2007006569W WO2008093931A1 WO 2008093931 A1 WO2008093931 A1 WO 2008093931A1 KR 2007006569 W KR2007006569 W KR 2007006569W WO 2008093931 A1 WO2008093931 A1 WO 2008093931A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting edge
minor
cutting
major
corner
Prior art date
Application number
PCT/KR2007/006569
Other languages
English (en)
Inventor
Hong Seung Son
Hyung Guen Joo
Original Assignee
Korloy Inc.
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39411861&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008093931(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Korloy Inc. filed Critical Korloy Inc.
Publication of WO2008093931A1 publication Critical patent/WO2008093931A1/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
    • 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
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1603—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove
    • 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
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/20—Top or side views of the cutting edge
    • B23B2200/201—Details of the nose radius and immediately surrounding area
    • 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
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/205—Discontinuous cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/36—Other features of the milling insert not covered by B23C2200/04 - B23C2200/32
    • B23C2200/367—Mounted tangentially, i.e. where the rake face is not the face with largest area

Definitions

  • the present invention relates, in general, to cutting inserts and, more particularly, to a cutting insert which reduces cutting resistance when a cutting process is conducted, thus increasing the lifetime thereof and the quality of a cut workpiece, and realizing high immersion and rapid feed cutting, thereby meeting the needs of consumers.
  • cutting tools are used to cut iron, nonferrous workpieces, and nonmetallic workpieces.
  • cutting tools are held by machines and cut workpieces to form them into desired shapes.
  • Such a cutting tool includes a cutting insert, which has a cutting edge, and a cutter body, which supports the cutting insert.
  • the cutting tools are classified into a brazing type cutting tool and an indexable type cutting tool.
  • a cutting insert is permanently fixed to part of a cutter body by brazing.
  • a cutting insert is removably fastened to a cutter body using a locking means, which is provided in the cutter body.
  • indexable type cutting tool because the cutting insert can be easily replaced with a new one when the lifetime of the cutting edge thereof expires, it can overcome the problem with the brazing type cutting tool, that is, the problem in which an expert must spend a long time grinding the cutting edge of the cutting insert after the lifetime of the cutting edge has been spent. Therefore, at present, indexable type cutting tools are widely used in the field of cutting tools.
  • an object of the present invention is to provide a cutting insert which reduces cutting resistance when a cutting process is conducted, thus increasing the lifetime thereof and the quality of a cut workpiece, and realizing high immersion and rapid feed cutting, thereby meeting the needs of consumers.
  • the present invention provides a cutting insert, including: an upper surface and a lower surface, which form a 180° rotationally symmetrical structure; two major side surfaces and two minor side surfaces, connecting the upper surface and the lower surface to each other; corner side surfaces connecting the two major side surfaces and the two minor side surfaces to each other, each of the corner side surfaces having a rounded shape; a major cutting edge part formed by a junction between each of the two major side surfaces and each of the upper surface and the lower surface; a minor cutting edge part formed by a junction between each of the two minor side surfaces and each of the upper surface and the lower surface; a cutting edge corner part provided in each of two corners of each of the upper and lower surfaces, which are opposite each other in a diagonal direction, the cutting edge corner part being formed by a junction between each of the corresponding corner side surfaces and each of the upper surface and the lower surface; and an inclined corner part provided in each of two remaining corners of each of the upper and lower surfaces, which are opposite each other in a diagonal direction, the inclined
  • the two major side surfaces may be opposite each other, the two minor side surfaces may be opposite each other, and each of the two major side surfaces may have a width greater than a width of each of the two minor side surfaces.
  • a circular opening may be formed through central portions of the two major side surfaces, and a locking boss may be provided in the circular opening.
  • an uppermost end of each of the cutting edge corner parts and the inclined corner parts may protrude higher than the corresponding upper or lower surface.
  • each of the inclined corner parts may include an inclined surface for preventing interference with a cut surface of a workpiece when a cutting process is conducted.
  • the inclined surface may extend from an upper end of the inclined corner part towards the corresponding corner side surface at an inclination angle ranging from 20° to 30°.
  • a corner cutting edge may have an included angle of 94.5°.
  • the corner cutting edge may extend, based on 90°, 3° towards the corresponding major side surface and 1.5° towards the corresponding minor side surface.
  • each of the cutting edge corner parts may include a corner cutting edge and a cutting edge land surface.
  • the corner cutting edge may have a curvature radius ranging from 0.4mm to 2.4D.
  • each of the major cutting edge parts may include a first major cutting edge, a second major cutting edge, a first major cutting edge land surface and a second major cutting edge land surface, wherein, when seen in a front view of the cutting insert, the first major cutting edge has a curvature radius ranging from 7mm to 18mm and extends from the corner cutting edge towards the corresponding inclined corner part and a central portion of the corresponding major side surface.
  • each of the minor cutting edge parts may include a first minor cutting edge, a second minor cutting edge, a third minor cutting edge, a first minor cutting edge land surface, a second minor cutting edge land surface and a third minor cutting edge land surface, wherein, when seen in a side view of the cutting insert, each of the first minor cutting edge and the second minor cutting edge is level with the corresponding corner cutting edge, and the third minor cutting edge has a curvature radius ranging from 1.0mm to 2.5mm and extends from an extended end of the second minor cutting edge towards the corresponding inclined corner part and a central portion of the corresponding minor side surface.
  • a chip breaker may be provided on each of the upper surface and the lower surface.
  • the present invention provides a cutting insert, in which an inclined surface is formed on each of inclined corner parts to prevent the cutting insert from interfering with a cut surface of a workpiece when cutting the workpiece, thus improving cutting quality.
  • the cutting insert of the present invention includes a minor cutting edge part, which has a first minor cutting edge, a second minor cutting edge and a third minor cutting edge. Therefore, the surface roughness of the cut workpiece is increased. Particularly, despite the realization of high immersion and rapid feed cutting, the surface roughness of the cut workpiece can be enhanced.
  • the cutting insert of the present invention includes a major cutting edge part, which has a first major cutting edge and a second major cutting edge, and the minor cutting edge part, which has the first minor cutting edge, the second minor cutting edge and the third minor cutting edge. Accordingly, when cutting the workpiece, cutting resistance can be reduced. Hence, the lifetime of the cutting insert is increased.
  • the first major cutting edge is oriented towards the inside of a major side surface
  • the first minor cutting edge and the third minor cutting edge are oriented towards the inside of a minor side surface. Therefore, there is an advantage in that it is easy to ensure the clearance angles of the major cutting edge and the minor cutting edge.
  • FIG. 1 is a view illustrating a cutting insert, according to the present invention.
  • FIG. 2 is a plan view of the cutting insert of FIG. 1 ;
  • FIG. 3 is a front view of the cutting insert of FIG. 1 ;
  • FIG. 4 is an enlarged view of a circled portion "A" of FIG. 2;
  • FIG. 5 is a side view of the cutting insert of FIG. 1.
  • FIG. 1 is a view illustrating a cutting insert, according to the present invention.
  • the cutting insert 100 of the present invention is made of cemented carbide through powder metallurgy, including a die stamping process, a sintering process, a grinding process, etc.
  • an upper surface 110a and a lower surface 110b are used to cut iron or a nonferrous metallic substance.
  • each of the upper surface 110a and the lower surface 110b has chip breakers.
  • the upper surface 110a and the lower surface 110b have a 180° rotationally symmetrical structure based on an imaginary horizontal center line CLl, as shown in FIG. 1. In other words, the upper surface 110a and the lower surface 110b have the same shape.
  • the cutting insert 100 has two major side surfaces 120 and two minor side surfaces
  • the cutting insert 100 further has corner side surfaces 140, which connect the corresponding major side surfaces 120 and the corresponding minor side surfaces 130 to each other and have rounded shapes.
  • the two major side surfaces 120 are opposite each other.
  • the two minor side surfaces 130 are also opposite each other.
  • the width of each major side surface 120 is greater than that of each minor side surface 130.
  • a circular opening 122 is formed through the central portions of the major side surfaces 120.
  • a locking boss 126 is provided in the circular opening 122, so that the cutting insert 100 is locked to a tool holder using the locking boss 126.
  • FIG. 2 is a plan view of the cutting insert of FIG. 1.
  • the cutting insert will be described herein below, centered on the upper surface, which has the same shape as that of the lower surface.
  • the cutting insert 100 includes two cutting edge corner parts 150, which are provided on two respective corners of the upper surface 110a, which are opposite each other in a diagonal direction, and two inclined corner parts 160, which are provided on the remaining two respective corners of the upper surface 110a.
  • each cutting edge corner part 150 is provided at the boundary between the upper surface 110a and the corresponding corner side surface 140.
  • each inclined corner part 160 is provided at the boundary between the upper surface 110a and the corresponding corner side surface 140.
  • the cutting edge corner parts 150 and the inclined corner parts 160 are constructed such that the upper ends thereof are disposed higher than the upper surface HOa.
  • Each cutting edge corner part 150 includes a corner cutting edge 152 and a corner land surface 154.
  • the inclined corner part 160 includes an inclined surface 162.
  • the corner cutting edge 152 which is mainly used in a cutting process, has a curvature radius Rl ranging from 0.4mm to 2.4D (see, FIG. 4).
  • the corner cutting edge 152 has an included angle ⁇ of 94.5°.
  • the corner cutting edge 152 extends, based on 90°, 3° towards the major side surface 120 and 1.5° towards the minor side surface 130.
  • a major cutting edge part 170 is formed between each cutting edge corner part 150 and a corresponding inclined corner part 160.
  • a minor cutting edge part 180 which is disposed at the boundary between the upper surface 110a and the corresponding minor side surface 130, or at the boundary between the lower surface 110b and the corresponding minor side surface 130, is formed between the cutting edge corner part 150 and the remaining inclined corner part 130.
  • the major cutting edge part 170 first contacts and cuts the workpiece.
  • the major cutting edge part 170 is provided on each of the boundaries between the upper surface 110a and the major side surfaces 120 and between the lower surface 110b and the major side surfaces 120.
  • FIG. 3 is a front view of the cutting insert of FIG. 1.
  • FIG. 4 is an enlarged view of a circled portion "A" of FIG. 2.
  • each major cutting edge part 170 includes a first major cutting edge 172, a second major cutting edge 174, a first major cutting edge land surface 176 and a second major cutting edge land surface 178.
  • the first major cutting edge 172 has a curvature radius ranging from 7mm to 18mm, and extends from the corner cutting edge 152 towards the inclined corner part 160 such that the height thereof is reduced from the corner cutting edge 152 towards the major side surface 120.
  • the first major cutting edge 172 linearly extends from the corner cutting edge 152 towards the inside of the major side surface 120 at an angle ⁇ ranging from 3° to 5°.
  • the second major cutting edge 174 is defined by an inclined line, which linearly extends from the first major cutting edge 172 towards the corresponding inclined corner part 160 at an inclination angle ⁇ , which ranges from 10° to 17° with respect to the horizontal line.
  • the second major cutting edge 174 linearly extends towards the inclined corner part 160 such that the height thereof is reduced towards the major side surface 120.
  • the second major cutting edge 174 is defined by a horizontal line, which linearly extends along the major side surface 120 from the first major cutting edge 172 to the inclined corner part 160.
  • the second major cutting edge 174 is constructed such that an extended end thereof is lower than the upper surface 110a. More preferably, the second major cutting edge 174 is constructed such that the extended end thereof is level with the upper surface HOa.
  • FIG. 5 is a side view of the cutting insert of FIG. 1.
  • the minor cutting edge part 180 is provided to increase the surface roughness of the cut workpiece, and includes a first minor cutting edge 182, a second minor cutting edge 184, a third minor cutting edge 186, a first minor cutting edge land surface 188, a second minor cutting edge land surface 190 and a third minor cutting edge land surface 192.
  • first minor cutting edge 182 and the second minor cutting edge 184 are level with the corner cutting edge 152.
  • the third minor cutting edge 186 has a curvature radius ranging from 1.0mm to 2.5mm, and extends from the end of the second minor cutting edge 184 towards the corresponding inclined corner part 160 such that the height thereof is reduced towards the corresponding minor side surface 130.
  • the first minor cutting edge 182 is defined by a linear line, which extends from the corner cutting edge 152 towards the inside of the minor side surface 130 at an angle ⁇ ranging from 0.5° to 2°.
  • the second minor cutting edge 184 is defined by a curved line, which has a curvature radius R4 ranging from 2.0mm to 10.0D and protrudes outwards from the minor side surface 130.
  • the third minor cutting edge 186 is defined by a linear line, which extends from the second minor cutting edge 184 towards the inside of the minor side surface 130 at an angle ⁇ ranging from 5° to 15°.
  • the length Ll of the first minor cutting edge 182 is less than the length L2 of the second minor cutting edge 184.
  • the length L2 of the second minor cutting edge 184 is less than the length L3 of the third minor cutting edge 186.
  • the length Ll of the first minor cutting edge 182 ranges from 0.15mm to 0.35D
  • the length L2 of the second minor cutting edge 184 ranges from 0.3mm to 0.8D
  • the length L3 of the third minor cutting edge 186 ranges from 0.2mm to 0.9D.
  • the cutting insert 100 having the above-mentioned construction can be used in a turning process as well as in a milling process.

Landscapes

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

Abstract

La présente invention concerne un insert de coupe qui réduit une résistance de coupe lorsqu'un procédé de coupe est conduit. L'insert de coupe comprend une surface supérieure (110a) et une surface inférieure (110b), deux surfaces latérales majeures (120), deux surfaces latérales mineures (130) et des surfaces latérales de coin (140). L'insert de coupe comprend en outre une partie de bordure de coupe majeure (170), qui est formée par une jonction entre chaque surface latérale majeure et chacune de la surface supérieure et de la surface inférieure, et une partie de bord de coupe mineure (180), qui est formée par une jonction entre chaque surface latérale mineure et chacune de la surface supérieure et de la surface inférieure, une partie de coin de bordure de coupe (150), qui est disposée dans chacun des deux coins de chacune des surfaces supérieure et inférieure, et une partie de coin inclinée (160), qui est disposée dans chacun des deux coins restants de chacune des surfaces supérieure et inférieure.
PCT/KR2007/006569 2007-01-29 2007-12-17 Insert de coupe WO2008093931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0008927 2007-01-29
KR1020070008927A KR100817259B1 (ko) 2007-01-29 2007-01-29 절삭 인서트

Publications (1)

Publication Number Publication Date
WO2008093931A1 true WO2008093931A1 (fr) 2008-08-07

Family

ID=39411861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/006569 WO2008093931A1 (fr) 2007-01-29 2007-12-17 Insert de coupe

Country Status (2)

Country Link
KR (1) KR100817259B1 (fr)
WO (1) WO2008093931A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010131240A1 (fr) * 2009-05-13 2010-11-18 Iscar Ltd. Plaquette de coupe présentant une partie plane en retrait, et outil de coupe associé
US20150117969A1 (en) * 2013-10-29 2015-04-30 Kennametal Inc. Cutting insert and shim for heavy machining operations
EP2603339A4 (fr) * 2010-08-13 2015-12-30 Ingersoll Cutting Tool Insert de découpe doté de dépressions de dégagement concaves formées sur des surfaces latérales de coin
EP2502691A4 (fr) * 2009-11-20 2016-08-24 Tungaloy Corp Plaquette de coupe et outil de coupe
WO2018193437A1 (fr) * 2017-04-21 2018-10-25 Iscar Ltd. Insert de fraisage à inclinaison ayant une géométrie de coupe non positive et un outil de fraisage à inclinaison

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101145523B1 (ko) 2009-09-29 2012-05-15 한국야금 주식회사 절삭 인서트
KR101239468B1 (ko) 2010-12-24 2013-03-06 한국야금 주식회사 절삭인서트

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930001513Y1 (ko) * 1987-02-03 1993-03-30 미쓰비시마테리알 가부시기가이샤 드로우 어웨이 팁(throw away tip)
KR20050084127A (ko) * 2002-12-04 2005-08-26 이스카 엘티디. 접선 절삭 삽입체 및 밀링 커터
KR20050123179A (ko) * 2003-05-08 2005-12-29 산드빅 인터렉츄얼 프로퍼티 에이비 선삭용 절삭 인서트
KR100566026B1 (ko) * 1998-07-13 2006-03-30 이스카 엘티디. 접선 방향 절삭 삽입체

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930001513Y1 (ko) * 1987-02-03 1993-03-30 미쓰비시마테리알 가부시기가이샤 드로우 어웨이 팁(throw away tip)
KR100566026B1 (ko) * 1998-07-13 2006-03-30 이스카 엘티디. 접선 방향 절삭 삽입체
KR20050084127A (ko) * 2002-12-04 2005-08-26 이스카 엘티디. 접선 절삭 삽입체 및 밀링 커터
KR20050123179A (ko) * 2003-05-08 2005-12-29 산드빅 인터렉츄얼 프로퍼티 에이비 선삭용 절삭 인서트

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010131240A1 (fr) * 2009-05-13 2010-11-18 Iscar Ltd. Plaquette de coupe présentant une partie plane en retrait, et outil de coupe associé
US8388275B2 (en) 2009-05-13 2013-03-05 Iscar, Ltd. Cutting insert having recessed planar portion and cutting tool therefor
EP2502691A4 (fr) * 2009-11-20 2016-08-24 Tungaloy Corp Plaquette de coupe et outil de coupe
EP2603339A4 (fr) * 2010-08-13 2015-12-30 Ingersoll Cutting Tool Insert de découpe doté de dépressions de dégagement concaves formées sur des surfaces latérales de coin
US20150117969A1 (en) * 2013-10-29 2015-04-30 Kennametal Inc. Cutting insert and shim for heavy machining operations
WO2018193437A1 (fr) * 2017-04-21 2018-10-25 Iscar Ltd. Insert de fraisage à inclinaison ayant une géométrie de coupe non positive et un outil de fraisage à inclinaison
US10112242B1 (en) 2017-04-21 2018-10-30 Iscar, Ltd. Ramping insert having non-positive cutting geometry and ramping tool
TWI757427B (zh) * 2017-04-21 2022-03-11 以色列商艾斯卡公司 具有非正切削幾何的斜進嵌件及斜進刀具

Also Published As

Publication number Publication date
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