WO1999028073A1 - Plaquette amovible et son support - Google Patents

Plaquette amovible et son support Download PDF

Info

Publication number
WO1999028073A1
WO1999028073A1 PCT/IL1998/000580 IL9800580W WO9928073A1 WO 1999028073 A1 WO1999028073 A1 WO 1999028073A1 IL 9800580 W IL9800580 W IL 9800580W WO 9928073 A1 WO9928073 A1 WO 9928073A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting insert
cutting
clamping
longitudinal axis
view
Prior art date
Application number
PCT/IL1998/000580
Other languages
English (en)
Inventor
Amir Satran
Yaron Eizen
Original Assignee
Iscar Ltd.
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 Iscar Ltd. filed Critical Iscar Ltd.
Priority to BR9815076-6A priority Critical patent/BR9815076A/pt
Priority to AU13498/99A priority patent/AU1349899A/en
Publication of WO1999028073A1 publication Critical patent/WO1999028073A1/fr

Links

Classifications

    • 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
    • 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
    • B23C5/08—Disc-type cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/50—Cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/50—Cutting inserts
    • B23C2210/504—Cutting inserts arranged in a manner that only extends longitudinally by one insert

Definitions

  • This invention relates to a cutting insert and a cutting insert holder therefor.
  • a drill with a cutting insert for so-called secondary machining operations such as chamfering, counterboring and/or countersinking.
  • the drill is formed with a major mainly cylindrical recess transversely disposed relative to its axis of rotation for receiving a cylindrical body portion of a cutting insert also having a longitudinal axis, an end cutting portion and a longitudinal groove co-directional with its longitudinal axis and extending along its entire length.
  • the drill is also formed with a similarly oriented minor mainly cylindrical recess which overlaps with the major recess for receiving a clamping pin when the cutting insert's longitudinal groove is in registration with the minor recess for releasably clamping the cutting insert in the major recess.
  • the cutting insert is released by removal of the clamping pin by means of a tool such as a pair of pliers.
  • the cutting insert suffers from its cutting end portion being weakened due to the provision of the longitudinal groove whilst the clamping arrangement also suffers from a number of disadvantages as follows: First, the cutting insert has to be necessarily initially accurately positioned in the major recess such that its longitudinal groove is in registration with the minor recess for insertion of the clamping pin. Second, the handling of the clamping pin is in itself rather difficult due to its shape and its small size which also lends to it being readily mislaid. Third, the insertion of the clamping pin does not in itself positively axially urge the cutting insert against an abutment surface but rather this is achieved by a force component of cutting forces acting on the cutting insert during a cutting operation.
  • the removal of the clamping pin is relatively cumbersome and time consuming since its available surface area to be gripped by a tool is relatively small.
  • the cutting insert and the clamping arrangement do not lend themselves to a cutting insert with a pair of lateral end portions.
  • a cutting insert having a longitudinal axis, a clamping portion with at least a partial cylindrical peripheral surface, and at least one cutting end portion having an end surface and being narrower than said clamping portion in an end view of the cutting insert and a cutting edge defined at the intersection of a rake surface and a relief surface and extending from said end surface to said cylindrical peripheral surface, said clamping portion having a clamping recess with at least one clamping surface transversely directed towards said longitudinal axis in a cross sectional view to a plan view of said recess and passing through said longitudinal axis.
  • a cutting insert of the present invention has a clamping surface against which a clamping element bears for simultaneously positively axially urging the cutting insert against an abutment surface and urging the cutting insert into a predetermined orientation relative to its longitudinal axis.
  • a clamping element preferably cooperates with a cutting insert such that the former can still urge the latter into a predetermined position and orientation without the latter being initially inserted into a cutting insert receiving pocket in a near absolute predetermined manner.
  • a cutting insert can preferably have a pair of lateral cutting end portions, for example, as illustrated and described in US Patent 3,599,303 to Sletten, and preferably with cutting end portions which can be simultaneously operative.
  • a cutting insert of the present invention can be deployed in a cutting tool implemented for either secondary machining operations only or, preferably, multi-machining operations on a workpiece up to a predetermined maximum depth of cut by virtue of a first set of one or more primary cutting inserts for stock removal from the workpiece up to the maximum depth of cut and a second set of one or more secondary cutting inserts for secondary machining operations at a depth of cut less than the maximum depth of cut.
  • a cutting tool can be implemented for inter alia milling operations, turning operations, and drilling operations.
  • Fig. 1 is a perspective view of a cutting insert in accordance with a first embodiment of the present invention
  • Fig. 2 is apian view of the cutting insert of Figure 1;
  • Fig. 3 is a front view of the cutting insert of Figure 1;
  • Fig. 4 is an end view of the cutting insert of Figure 1 ;
  • FIGS. 5-10 are perspective views of cutting inserts in accordance with additional embodiments of the present invention.
  • Fig. 11 is an end view of a cutting insert in accordance with a still further embodiment of the present invention.
  • Fig. 12 is a partial perspective view of a slotting cutter in accordance with the present invention
  • Fig. 13 is a partial side view of the slotting cutter of Figure 12;
  • Fig. 14 is a partial cross sectional view of the slotting cutter of Figure 12 taken along line XIV-XTV in Figure 13 and showing also a machined workpiece;
  • Fig. 15 is an enlarged cross sectional view of a portion of the slotting cutter of Figure 12 taken along lines XV-XV in Figures 13 and 14;
  • Fig. 16 is a perspective view of the portion of the slotting cutter shown in Figure 13;
  • Fig. 17 is a partial cross sectional view of a slotting cutter similar to the slotting cutter of Figure 12 showing a cutting insert disposed so as to present a single operative cutting edge;
  • Fig. 18 shows a workpiece with a stepped shape profile machined by a slot cutter having three sets of different cutting inserts of the present invention at different radially disposed positions;
  • Fig. 19 is a partial perspective view of a turning tool including a cutting insert of the present invention.
  • a double ended cutting insert 1 of length L has a longitudinal axis 2 and a central clamping portion 3 interdisposed between a pair of lateral cutting end portions 4 and 6.
  • the clamping portion 3 has a cylindrical peripheral surface 7 and a longitudinal median plane 8 passing through the longitudinal axis 2.
  • the clamping portion 3 is formed with a symmetrical V-shaped groove 9 constituting a clamping recess bounded in the clamping portion 3 and having a plane of symmetry 11 normal to the longitudinal axis 2 (see Figure 3).
  • the groove 9 has clamping surfaces 12 and 13 meeting at a line 14 parallel to the longitudinal median plane 8 and normal to the longitudinal axis 2.
  • the cutting end portions 4 and 6 have planar end surfaces 16 and 17 which are narrower than the cylindrical peripheral surface 7 in an end view of the cutting insert 1.
  • the cutting end portions 4 and 6 also have planar rake surfaces 18 and 19, respectively, intersecting with planar relief surfaces 21 and
  • FIG. 2 shows a cutting insert 27 similar to the cutting insert 1 differing therefrom in that it has concave cutting edges 28.
  • Figure 6 shows a cutting insert 29 similar to the cutting insert 1 and differing therefrom in that it has convex cutting edges 31.
  • Figure 7 shows a cutting insert 32 similar to the cutting insert 1 and differing therefrom in that its clamping recess is constituted by a substantially conical groove 33 with an axis 34 perpendicular to the longitudinal axis 2 in a front view of the cutting insert 32.
  • Figure 8 shows a cutting insert 36 similar to the cutting insert 1 and differing therefrom in that it is single ended with a clamping portion 3 having a partial cylindrical peripheral surface 37 in an end view of the cutting insert 36.
  • Figure 9 shows a cutting insert 38 similar to the cutting insert 1 and differing therefrom in that it is indexable with an axis of rotation 39 normal to the longitudinal axis 2 and its cutting end portions 4 and 6 have cutting edges 41 and 42 directed in opposite senses.
  • Figure 10 shows a cutting insert 43 similar to the cutting insert 38 and differing therefrom in that its cutting end portion 4 has cutting edges 44 and 46 and its cutting end portion 6 has cutting edges 47 and 48.
  • the cutting insert 43 is indexable with an axis of rotation 45 normal to the longitudinal axis 2 whereby the cutting insert 43 can be used as a right or left hand insert, and whereby the cutting edge 44 is indexable with the cutting edge 48 and the cutting edge 46 is indexable with the cutting edge 47.
  • the cutting edges 44 and 47 can be simultaneously operative as can the cutting edges 46 and 48.
  • Figure 11 shows a cutting insert 49 similar to the cutting insert 1 and differing therefrom in that it has a curved cutting edge 51 defined at the intersection of a curved rake surface 52 and a curved relief surface 53.
  • Figures 12-16 show a double-sided slotting cutter 60 for a multi-machining operation on a workpiece 61 for forming a groove 62 having chamfered surfaces 63 and 64 (see Figure 14).
  • the slotting cutter 60 has a main body 65 rotatable about an axis of rotation 66 and having a hub 67, a peripheral portion 68 and an intermediate portion 69 therebetween.
  • the hub 67 has a stepped configuration with an annular rim 71 to provide an end wall 72 of a number of cylindrical cutting insert receiving pockets 73 each having a longitudinal axis 74 parallel to the axis of rotation 66.
  • a screw threaded through bore 76 terminates at a cutting insert receiving pocket 73.
  • the screw threaded bore 76 receives a clamping screw 77 constituting a clamping element.
  • a clamping screw 77 has a front end 78 for abutting against a clamping surface 13 of a cutting insert 1 for rotating same into its operative position and for urging its end face 17 against the end wall 72 for accurate positioning.
  • the slotting cutter 60 has conventionally mounted cutting inserts 79 (constituting primary cutting inserts) disposed on the peripheral portion 68 for machining the groove 62, and annularly disposed cutting inserts 1 (constituting secondary cutting inserts) disposed partially in the hub 67 for chamfering the groove 62 to obtain the chamfered surfaces 63 and 64.
  • the cutting inserts 79 are disposed so as to present alternate right and left hand operative side cutting edges 81 and 82, respectively, and respective overlapping peripheral cutting edges 83 and 84 of an overall cutting length d which is less than the length L of the cutting inserts 1 so that their cutting edges 23 and 24 respectively machine chamfered surfaces 63 and 64.
  • secondary cutting inserts do not have to be located in a slotting cutter's hub region but can be equally well located at any radial location and possibly with only a single operative cutting edge (see Figure 17).
  • a slotting cutter can be provided with several sets of secondary cutting inserts at different radial locations, for example, cutting inserts 1 for machining a chamfer 86, cutting inserts 29 for machining a concave step 87 and cutting inserts 27 for machining a convex step 88 (see Figure 18).
  • the present invention is not limited to milling operations and can be equally applied to a turning tool 89 having a main body 91 with a longitudinal axis 92 and a cylindrical insert receiving pocket 93 with a longitudinal axis 94 perpendicular to the longitudinal axis 92 for clampingly receiving a cutting insert 1 (see Figure 19).

Landscapes

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

Abstract

L'invention porte sur une plaquette de coupe amovible (1) présentant un axe longitudinal (2), une partie de fixation (3) dont la surface périphérique (7) est au moins partiellement cylindrique, et au moins une extrémité de coupe (4, 6) présentant une surface finale (16, 17), et étant plus étroite que la partie de fixation selon une vue latérale de la plaquette, et une arête de coupe (23, 24) correspondant à l'intersection de la surface de coupe (18, 19) et de la surface de dépouille (21, 22) et s'étendant de la surface finale à la surface périphérique cylindrique. La partie de fixation comporte une gorge de fixation (9) dont l'une au moins des surfaces de fixation (12, 13) est orientée transversalement selon l'axe longitudinal dans une vue perpendiculaire à la vue en plan de la gorge et passant par l'axe longitudinal.
PCT/IL1998/000580 1997-12-01 1998-11-29 Plaquette amovible et son support WO1999028073A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR9815076-6A BR9815076A (pt) 1997-12-01 1998-11-29 Inserto de corte, e, suporte para o mesmo
AU13498/99A AU1349899A (en) 1997-12-01 1998-11-29 Cutting insert and cutting insert holder therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL12236897A IL122368A0 (en) 1997-12-01 1997-12-01 Cutting insert and cutting tool assembly therefor
IL122368 1997-12-01

Publications (1)

Publication Number Publication Date
WO1999028073A1 true WO1999028073A1 (fr) 1999-06-10

Family

ID=11070908

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL1998/000580 WO1999028073A1 (fr) 1997-12-01 1998-11-29 Plaquette amovible et son support

Country Status (4)

Country Link
AU (1) AU1349899A (fr)
BR (1) BR9815076A (fr)
IL (1) IL122368A0 (fr)
WO (1) WO1999028073A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076707A2 (fr) * 1999-06-16 2000-12-21 Sandvik Gmbh Plaquette de coupe pour fraise d'usinage d'arbres a cames, et fraise en disque correspondante
WO2014030153A1 (fr) 2012-08-21 2014-02-27 Iscar Ltd. Fraise à chanfreiner et plaquette amovible de chanfreinage pour celle-ci
US20140377021A1 (en) * 2013-06-21 2014-12-25 Albert Knebel Gmbh & Co. Kg Holding Saw blade having a small saw tooth
JP2016055353A (ja) * 2014-09-05 2016-04-21 住友電工ハードメタル株式会社 ヘッド交換式ドリル、およびヘッド交換式ドリル用のヘッド
WO2018150413A1 (fr) 2017-02-16 2018-08-23 Iscar Ltd. Corps d'outil pourvu d'une poche interne de réception d'insert à élément de serrage souple, outil de coupe et insert de coupe pour chanfreinage correspondant
EP3628459A1 (fr) * 2018-09-27 2020-04-01 TWT S.r.l. Fraise à bois à unité simple

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561968A1 (fr) * 1984-03-28 1985-10-04 Sicerm Fraise, notamment destinee au travail du bois, et son procede d'affutage
EP0264642A1 (fr) * 1986-09-22 1988-04-27 Karl-Heinz Holler Outil de coupe pour l'usinage de métaux par enlèvement de copeaux en particulier outil de rainurage
US5676505A (en) * 1994-09-07 1997-10-14 Walter Ag Method and milling tool to make deep grooves in a workpiece, especially in rotors of generators and turbines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561968A1 (fr) * 1984-03-28 1985-10-04 Sicerm Fraise, notamment destinee au travail du bois, et son procede d'affutage
EP0264642A1 (fr) * 1986-09-22 1988-04-27 Karl-Heinz Holler Outil de coupe pour l'usinage de métaux par enlèvement de copeaux en particulier outil de rainurage
US5676505A (en) * 1994-09-07 1997-10-14 Walter Ag Method and milling tool to make deep grooves in a workpiece, especially in rotors of generators and turbines

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076707A3 (fr) * 1999-06-16 2001-02-22 Sandvik Gmbh Plaquette de coupe pour fraise d'usinage d'arbres a cames, et fraise en disque correspondante
US6929428B1 (en) 1999-06-16 2005-08-16 Sandvik Ab Cutting insert and cutting insert holder therefor
WO2000076707A2 (fr) * 1999-06-16 2000-12-21 Sandvik Gmbh Plaquette de coupe pour fraise d'usinage d'arbres a cames, et fraise en disque correspondante
DE112013004124B4 (de) 2012-08-21 2022-01-20 Iscar Ltd. Fasfräser und Faseinsatz dafür
WO2014030153A1 (fr) 2012-08-21 2014-02-27 Iscar Ltd. Fraise à chanfreiner et plaquette amovible de chanfreinage pour celle-ci
US9162296B2 (en) 2012-08-21 2015-10-20 Iscar, Ltd. Chamfering cutter and chamfering insert therefor
US20140377021A1 (en) * 2013-06-21 2014-12-25 Albert Knebel Gmbh & Co. Kg Holding Saw blade having a small saw tooth
JP2016055353A (ja) * 2014-09-05 2016-04-21 住友電工ハードメタル株式会社 ヘッド交換式ドリル、およびヘッド交換式ドリル用のヘッド
US10493539B2 (en) 2017-02-16 2019-12-03 Iscar, Ltd. Tool body having an inner insert receiving pocket with resilient clamping member, cutting tool and chamfering cutting insert therefor
JP2020507481A (ja) * 2017-02-16 2020-03-12 イスカル リミテッド 弾力性クランプ部材を備えた内側インサート受容ポケットを有する工具ボディ、切削工具およびそのための面取り切削インサート
RU2752159C2 (ru) * 2017-02-16 2021-07-23 Искар Лтд. Корпус инструмента, имеющий внутреннее гнездо с упругим зажимным элементом для размещения режущей пластины, режущий инструмент и его режущая пластина для снятия фасок
WO2018150413A1 (fr) 2017-02-16 2018-08-23 Iscar Ltd. Corps d'outil pourvu d'une poche interne de réception d'insert à élément de serrage souple, outil de coupe et insert de coupe pour chanfreinage correspondant
EP3628459A1 (fr) * 2018-09-27 2020-04-01 TWT S.r.l. Fraise à bois à unité simple

Also Published As

Publication number Publication date
BR9815076A (pt) 2000-10-03
IL122368A0 (en) 1998-06-15
AU1349899A (en) 1999-06-16

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