WO1994014558A1 - Outil a enlevement de copeaux - Google Patents

Outil a enlevement de copeaux Download PDF

Info

Publication number
WO1994014558A1
WO1994014558A1 PCT/DE1993/001161 DE9301161W WO9414558A1 WO 1994014558 A1 WO1994014558 A1 WO 1994014558A1 DE 9301161 W DE9301161 W DE 9301161W WO 9414558 A1 WO9414558 A1 WO 9414558A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
cutting insert
insert
recess
holder
Prior art date
Application number
PCT/DE1993/001161
Other languages
German (de)
English (en)
Inventor
José AGUSTIN PAYÀ
Erwin Stallwitz
Original Assignee
Krupp Widia Gmbh
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 Krupp Widia Gmbh filed Critical Krupp Widia Gmbh
Publication of WO1994014558A1 publication Critical patent/WO1994014558A1/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
    • B23B27/16—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
    • B23B27/1614—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 plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0461—Round
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/16—Supporting or bottom surfaces
    • B23B2200/165—Supporting or bottom surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/32—Chip breaking or chip evacuation
    • B23B2200/321—Chip breaking or chip evacuation by chip breaking projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3627—Indexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/12—Seats for cutting inserts

Definitions

  • the invention relates to a cutting tool with at least one cutout for a replaceable cutting insert, the cutout in each case having a contact surface adapted to the cutting insert geometry and at least one cylindrical or frustoconical segment or conical side contact surface.
  • Cutting inserts which are interchangeably arranged in tool holders have the advantage that the actual tool can be replaced by a new one after wear, which avoids long downtimes as well as higher costs if parts not exposed to wear (such as the tool holder) ) must be replaced with. Further progress was also made by the so-called indexable insert, which, after wear of a cutting corner or cutting edge, could be positioned in the insert seat of the tool holder by turning such that a next, previously unused cutting edge can be used. Indexable inserts are known in practically all machining processes, such as turning, milling, broaching, grooving, turning-broaching or turning-turning-broaching or similar variants.
  • DE 26 53 222 A1 also discloses a cutting tool on which at least a first localization element is designed in the form of a projection and that the basic tool body forms a fastening support on which at least a second localization element designed as a recess is formed.
  • the above-mentioned localization elements are designed such that they can be inserted into one another, so that the insert and the support are fixed in a certain selectable, relative orientation to one another a relative displacement between the insert and the support is prevented if these are firmly clamped together.
  • the localization elements mentioned serve as positive locking and clamping elements with the risk of geometric overdetermination.
  • DE 28 26 564 C2 relates to an insert holder which is adjustably secured to an elongated shaft in the form of a cassette and on which a triangular indexable insert is positioned.
  • the insert holder has a generally cylindrical main part and an insert support part protruding from the side surface of the main part, this large-volume part having a through hole for receiving a screw bolt, with which the insert holder is fastened to the tool holder.
  • an adjusting device which has angularly arranged recesses on the surface of the insert holder as well as an adjusting and locking screw which is in screw connection with the upper arm of the shank of the tool holder, optionally to come into engagement with one of the depressions on the surface of the insert holder.
  • this embodiment requires a large amount of space.
  • DE 38 18 970 C1 also describes a tool on which a cutting plate held in a receptacle of an intermediate plate is fastened, the intermediate plate being rotatable in an arcuate recess in the tool carrier and being lockable in several angular positions relative to the tool carrier, for which purpose the Intermediate plate or the recess carries approaches that can be inserted into one of several recesses of the same cross section of the recess or intermediate plate.
  • the intermediate plate has a receptacle for a triangular indexable insert.
  • DE 33 21 184 AI describes a turning tool with a holder for an interchangeable cutting insert, which has a recess in which an increase in the support surface of the holder engages with play in the untensioned state.
  • the aim of this is to ensure that the countersunk screw can be easily inserted into the bore of the holder through the bore of the cutting insert when it engages in the fastening hole. If the countersunk screw is tightened for fastening the cutting insert, the respective surfaces of said recess and said elevation opposite when the screw is tightened form the lateral (and only) contact of the cutting insert with the holder, since the rear insert free surface is at a distance from the opposite insert seat wall surface lies. Furthermore, the cutting insert can have recesses in the floor or in the open space, into which two pins provided on the holder engage when the cutting insert is placed on the holder and which, with their possibly oblique end faces of the recess, form the contact surfaces. This can also result in the risk of the cutting insert jamming.
  • the cutting inserts are not necessarily aligned due to their outer geometry, to which the insert seat of the tool holder is adapted, as is the case, for example, with triangular, square or hexagonal cutting inserts, the cutting inserts must be adjusted in each case. This applies in particular to those cutting inserts which have chip-forming elements on their rake face which are aligned with respect to the direction of chip removal. If the actual chip run-off angle and the optimum chip run-off angle desired in relation to the chip form elements do not match, the chip form elements may become at least partially ineffective or wear of these parts may increase.
  • the novelty is that the cutting insert and the recess have a ⁇ predetermined by the arrangement location of the cutting insert in respect to the holder enabling indexing means, the other border of each inein ⁇ recesses and There are ridges between which there is play of 0.1 mm to 0.2 mm on at least one side. There is clearance in the form of play between the depressions and the elevations of an indexing agent, so that an overdetermination of the position of the cutting insert in relation to the cutting insert seat in the tool holder is avoided, which in the worst case can lead to jamming.
  • indexing means can be used as indexing means, which enable the cutting insert to be oriented in relation to the tool holder receptacle without the interlocking elevations and depressions being positively locked.
  • Special embodiments are those of a bolt, a pin or a spherical cap, which are opposed by corresponding recesses, grooves or bores.
  • the manufacture of indexing means does not involve a great deal of effort since, for example, depressions to be made in the base surface can be introduced directly during powder metallurgical pressing of the sintered body, as well as other chip-forming elements.
  • the indexing means consist regularly of a positive and a negative part (male-female) which interlock so that only one or more predetermined positions of the cutting insert with respect to the tool holder recess are possible.
  • the indexing means can additionally be designed as a fixation or anti-rotation device, for example absorbing cutting forces or additional torques.
  • the indexing means can be attached either in the cylindrical segment-like side wall of the tool holder or in the base surface or in both parts. The same applies to the corresponding indexing medium parts of the cutting insert. This makes it possible, for example, to use one and the same holder of a tool holder for different types of cutting inserts, one type of which has indexing means in the side surface (free area), while the other type has indexing means in the ground, in this case designed as elevations.
  • the indexing means are shaped polygonally asymmetrically, so that they are unambiguous with respect to a type of cutting insert.
  • the depressions in the transition to the base or side surface of the cutting insert or the corresponding corresponding surfaces of the tool holder are designed with sharp edges. Driving over a "corner” or sharp edge is easier to determine than driving over a "smooth transition”.
  • Possible with the indexing agents are also combinations of bolts with spherical caps or similar variants, insofar as the tolerance dimensions to be observed in the game still allow a sufficient orientation of the cutting inserts in relation to the insert seat.
  • the base plate (instead of the support surface of the tool holder) is equipped with the indexing means, which correspond to the corresponding indexing means of the base surface of the cutting insert.
  • the indexing agent parts are designed to penetrate through the base plate or the base plate is itself indexed relative to the support surface in the tool holder.
  • FIG. 1 is a partial view of a tool holder with recess for a cutting insert
  • Fig. 2a shows a circular cutting insert in a
  • FIG. 3 shows a sectional view along a line A - A of the cutting insert according to FIG. 2a, which is inserted into a recess of a tool holder according to FIG. 1,
  • 4 shows a circular cutting insert with indexing means in the lateral (cylinder jacket) surfaces
  • 5 shows a tool holder with an inserted cutting insert in relation to various cutting forces
  • FIGS. 7e to g are cross-sectional views of the cutting inserts according to FIGS. 7a to d.
  • the recess 11 is designed as a cutting insert seat and is geometrically open ⁇ taking cutting insert adapted. Also known are a threaded fastening hole 12 for receiving a clamping screw which projects through a cutting insert.
  • the bearing surface 112 has a vertically protruding bolt 13 as a (male) part of the indexing means.
  • FIG. 2a A cutting insert for the recess 11 according to FIG. 1 can be seen from FIG. 2a.
  • This cutting insert 14 has a circular shape, a central fastening hole 15 and a plateau 16 with individual chip shaping elements 17 directed towards the cutting edge. Following the cutting edge, a chamfer 18 or a chip shaping groove or the like can also be arranged.
  • this cutting insert 14 has trough-shaped recesses 19 on opposite sides, which are shown in cross section in FIG. 2b.
  • the recess 19 can be in the form of a blind hole, it can also be angular, rounded, trapezoidal or, as shown, arcuate with an opening angle ⁇ .
  • the depth H of the recess 19 is greater than the height of the bolt 13 insofar as it protrudes from the surface 112.
  • the type of indexing can be seen from FIG. 3, in particular that the bolt height 13 must be smaller than the depth of the recess 12. There is a distance, a play 20 of to, between the bolt 13 and the wall of the recess 12 adhered to 2/10 mm. This prevents overdetermination.
  • an elevation based on the contour of the recess 19 can also be selected, for example in the form of a spherical cap or an ellipsoid of revolution or other three-dimensional conical shapes.
  • the interlocking elevations and depressions can also be designed in the manner of a key lock system as additional securing elements. If an indexing bolt is used, the number of recesses 19 in the cutting insert depends on how often this cutting insert is to be rotated through an angle. In the present case with two recesses 19, only a single turn is possible since all other angular positions are blocked.
  • FIG. 4 Another possibility of indexing, namely via the side surface (free surface) 21 of a cutting element 14, is shown in FIG. 4.
  • the same parts of this cutting element are identified by the same reference numerals as in FIG. 2a.
  • the cutting insert 14 has sawtooth-shaped depressions 22 which together with a bolt 23 form an indexing.
  • indexings 13/19 can possibly act as abutments, in particular with forces F ⁇ and F3.
  • 6 shows a selection of possible indexings. 6a to e all lie in the side surface of the circular cutting insert there.
  • the indexings can be four spherical caps as raised parts 24 or corresponding recesses 25, which correspond to respective recesses or raised parts of the side surface 111 (see FIG. 1).
  • smooth-faced millings 26 have been created which, in contrast to the indexings 24 and 25, can possibly also extend into the cutting edge area.
  • the cutting insert according to FIG. 6d has four blind bores 27, while the cutting insert according to FIG. 6e has a bolt 28.
  • the cutting insert can have a diagonally extending recess 29 or four crosswise arranged longitudinal ribs 30 or three or more raised spherical caps 31, 32, which correspond to corresponding beads, grooves or dome-like recesses.
  • the recess of the cutting insert can also have a polygonal, completely asymmetrical shape 32, which can also serve as a securing element with regard to a corresponding socket in the support. All indexings are possible both in a corresponding manner in the support surface of the tool carrier 10 and in a washer arranged thereon, which can itself be indexed with respect to the support surface.
  • FIG. 7 shows part of the cutting inserts for which the present invention is of importance.
  • the individual cutting inserts are circular according to FIG. 7a or, according to FIGS. 7b and 7c, each have plan segment-like contact surfaces 33 in plan view, while the respective cutting edges on the opposite side can have the most varied contours.
  • 7e to g each show sections through known cutting inserts, from which the rake face geometry is clear, in particular chip recesses 34 as well as plateaus 35 and also beveled open faces 36.
  • the cutting insert according to FIG. 7f can be used as an insert on both sides.
  • a steel crankshaft was machined radially and axially using a RNMX 1205 Mo / P-CVD 2 grade, with a depth of cut between 0.5 and 3.0 mm and a feed between 0.35 and 0.5 mm / v and the cutting speed was 160 to 400 m / min.
  • the tool life could be increased by a factor of 4 to 5 compared to conventional machining with a machining time reduced by approx. 10%.
  • the RNMX 1205 Mo / HK 150 grade is used for radial and axial machining with a depth of cut of 2.5 mm, a feed rate of 0.35 to 0.45 mm / v and cutting speeds of 175 to 190 m / min have been used.
  • the amount of tool life for conventional machining could be increased by a factor of 3 to 4.
  • the processing time was reduced by approx. 10%, with an additional reduction in noise during processing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un outil à enlèvement de copeaux comprenant un porte-outil qui présente au moins une cavité (11) pour recevoir une plaquette coupante remplaçable (14). La cavité comporte une surface d'appui (112) adaptée à la forme de la plaquette coupante et au moins une face de positionnement (111) latérale, cylindrique ou tronconique. La plaquette coupante (14) et la cavité comportent des moyens d'indexage (13, 19; 22, 23; 24 à 32) qui permettent de déterminer clairement la position et l'alignement exact de la plaquette coupante par rapport au porte-outil.
PCT/DE1993/001161 1992-12-28 1993-12-03 Outil a enlevement de copeaux WO1994014558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4244316.4 1992-12-28
DE4244316A DE4244316C2 (de) 1992-12-28 1992-12-28 Zerspanungswerkzeug

Publications (1)

Publication Number Publication Date
WO1994014558A1 true WO1994014558A1 (fr) 1994-07-07

Family

ID=6476698

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/001161 WO1994014558A1 (fr) 1992-12-28 1993-12-03 Outil a enlevement de copeaux

Country Status (3)

Country Link
CN (1) CN1090801A (fr)
DE (1) DE4244316C2 (fr)
WO (1) WO1994014558A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039122A1 (fr) * 1997-03-05 1998-09-11 Sandvik Aktiebolag (Publ) Porte-outil destine a des plaquettes de coupe
DE19847227A1 (de) * 1998-10-14 2000-04-20 Walter Ag Zerspanungswerkzeug mit formschlüssigem Plattensitz

Families Citing this family (28)

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Publication number Priority date Publication date Assignee Title
DE4430171C2 (de) * 1994-08-25 1996-08-14 Walter Ag Formschlüssig gesicherte Schneidplatte
US6238133B1 (en) † 1998-10-20 2001-05-29 Kennametal Pc Inc. Anti-rotation mounting mechanism for round cutting insert
AT3111U1 (de) * 1998-12-22 1999-10-25 Plansee Tizit Gmbh Zerspanungswerkzeug
DE10142049A1 (de) 2001-08-28 2003-03-20 Kennametal Inc Schneideinsatz und seine Verwendung
US20030206777A1 (en) * 2002-05-03 2003-11-06 Gyllengahm Ulf Stefan Metal cutting insert having straight cutting edge and curved abutment surface
AT500199A1 (de) * 2002-07-05 2005-11-15 Weingaertner Maschb Ges M B H Werkzeug und schneidplatten zum wirbelfräsen
SE526255C2 (sv) * 2003-03-14 2005-08-09 Sandvik Intellectual Property Verktyg och indexerbart skär för finsvarvning av rotationssymmetriska spår i arbetsstycken
US7722297B2 (en) * 2003-04-15 2010-05-25 Tdy Industries, Inc. Antirotation tool holder and cutting insert
US7220083B2 (en) 2003-10-15 2007-05-22 Tdy Industries, Inc. Cutting insert for high feed face milling
DE102004001970A1 (de) * 2004-01-13 2005-08-11 Komet Group Holding Gmbh Maschinenwerkzeug sowie Grundkörper und Schneidplatte für ein Maschinenwerkzeug
SE526399C2 (sv) 2004-01-30 2005-09-06 Sandvik Intellectual Property Skärverktyg jämte del därtill med kopplingsytor med rillor samt tillverkningsförfarande för dessa
SE528770C2 (sv) * 2004-08-25 2007-02-13 Seco Tools Ab Skärverktyg för vässning av elektrodspetsar med utbytbara skär
DE102005032653B3 (de) * 2005-07-13 2006-11-30 Fette Gmbh Verfahren zur Herstellung einer formschlüssigen Verbindung zwischen einem Werkzeugeinsatz und einem Werkzeugträger eines rotierenden Werkzeugs
SE0600876L (sv) 2006-04-20 2007-10-21 Sandvik Intellectual Property Verktyg och skär för spånavskiljande bearbetning med primära och sekundära ingreppsmedel med rotationssymmetrisk form
US7607867B2 (en) 2006-12-15 2009-10-27 Sandvik Intellectual Property Ab Tooling insert with mating surface
DE102008037915B3 (de) 2008-08-14 2009-08-13 Kennametal Inc. Wendeschneidplatte
US9586264B2 (en) 2009-04-28 2017-03-07 Kennametal Inc. Double-sided cutting insert for drilling tool
KR101103216B1 (ko) 2009-05-19 2012-01-05 대구텍 유한회사 원형 형상을 갖는 양면형 절삭 삽입체 및 이를 사용하는 절삭 공구
US8573903B2 (en) 2009-11-03 2013-11-05 Kennametal Inc. Round cutting insert with anti-rotation feature
US8657539B2 (en) 2011-03-28 2014-02-25 Kennametal Inc. Round cutting insert with reverse anti-rotation feature
USD709110S1 (en) 2012-04-24 2014-07-15 Kennametal Inc. Cutting insert
US8858130B2 (en) 2012-04-24 2014-10-14 Kennametal Inc. Indexable circular cutting insert
US9283626B2 (en) 2012-09-25 2016-03-15 Kennametal Inc. Double-sided cutting inserts with anti-rotation features
US9011049B2 (en) 2012-09-25 2015-04-21 Kennametal Inc. Double-sided cutting inserts with anti-rotation features
CN103962592B (zh) * 2014-05-26 2016-03-16 江苏万达特种轴承有限公司 一种数控车削圆弧斜面倒角的加工方法
CN107598669B (zh) * 2017-10-17 2024-02-09 青岛海之冠汽车配件制造有限公司 数控冷却液回流装置
CN108406305B (zh) * 2018-04-13 2024-04-26 袁开靖 一种可相对滑动对称定位的套接体及其装配方法
CN110434362A (zh) * 2019-09-12 2019-11-12 哈尔滨理工大学 一种轴承滚道专用加工车削刀具

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EP0037691A2 (fr) * 1980-04-07 1981-10-14 General Electric Company Ensemble porte-outil avec plaquette de coupe interchangeable pour un outil de coupe
EP0091408A2 (fr) * 1982-04-01 1983-10-12 Santrade Ltd. Plaquette de coupe et porte-outil correspondant
EP0300172A2 (fr) * 1987-07-24 1989-01-25 Gte Valenite Corporation Dispositif de prévention de rotation pour des plaquettes de coupe rondes

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JPS547693A (en) * 1977-06-18 1979-01-20 Suzuki Tekko Kk Cutting tool holder
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Publication number Priority date Publication date Assignee Title
EP0037691A2 (fr) * 1980-04-07 1981-10-14 General Electric Company Ensemble porte-outil avec plaquette de coupe interchangeable pour un outil de coupe
EP0091408A2 (fr) * 1982-04-01 1983-10-12 Santrade Ltd. Plaquette de coupe et porte-outil correspondant
EP0300172A2 (fr) * 1987-07-24 1989-01-25 Gte Valenite Corporation Dispositif de prévention de rotation pour des plaquettes de coupe rondes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039122A1 (fr) * 1997-03-05 1998-09-11 Sandvik Aktiebolag (Publ) Porte-outil destine a des plaquettes de coupe
DE19847227A1 (de) * 1998-10-14 2000-04-20 Walter Ag Zerspanungswerkzeug mit formschlüssigem Plattensitz
DE19847227C2 (de) * 1998-10-14 2001-06-28 Walter Ag Zerspanungswerkzeug mit formschlüssigem Plattensitz

Also Published As

Publication number Publication date
CN1090801A (zh) 1994-08-17
DE4244316A1 (de) 1994-06-30
DE4244316C2 (de) 2002-08-29

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