EP0691897A1 - Plaquette de coupe - Google Patents

Plaquette de coupe

Info

Publication number
EP0691897A1
EP0691897A1 EP94908975A EP94908975A EP0691897A1 EP 0691897 A1 EP0691897 A1 EP 0691897A1 EP 94908975 A EP94908975 A EP 94908975A EP 94908975 A EP94908975 A EP 94908975A EP 0691897 A1 EP0691897 A1 EP 0691897A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting insert
rake face
insert according
chamfer
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP94908975A
Other languages
German (de)
English (en)
Inventor
José AGUSTIN PAYA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Widia GmbH
Original Assignee
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 Widia GmbH filed Critical Widia GmbH
Publication of EP0691897A1 publication Critical patent/EP0691897A1/fr
Withdrawn legal-status Critical Current

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
    • B23B27/04—Cutting-off tools
    • 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
    • B23B27/04—Cutting-off tools
    • B23B27/045—Cutting-off tools with chip-breaking arrangements
    • 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
    • B23B27/06—Profile cutting tools, i.e. forming-tools
    • B23B27/065—Thread-turning tools
    • 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
    • B23B2200/08—Rake or top surfaces
    • B23B2200/083—Rake or top surfaces curved
    • 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
    • B23B2200/32—Chip breaking or chip evacuation
    • B23B2200/323—Chip breaking or chip evacuation by chip breaking depressions
    • 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
    • B23B2200/3645—Lands, i.e. the outer peripheral section of the rake face
    • B23B2200/3654—Lands, i.e. the outer peripheral section of the rake face being variable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/34—Round
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/16—Constructions comprising three or more similar components

Definitions

  • the invention relates to a cutting insert with a negative rake face chamfer adjoining the cutting edges, in particular for radial machining operations such as grooving, turning rooms, turning-turning rooms, milling or thread turning.
  • Negative chamfers on cutting inserts have the advantage of stabilizing the cutting edge, but this has the disadvantage that chip removal is severely hindered, with increased friction which requires a relatively large feed force.
  • the width of the rake faces ⁇ chamfer is maximum in at least one cutting edge corner in relation to the effective insert zone.
  • the bevel is thus constricted, which can extend so far that in extreme cases the bevel width becomes zero. Be minimized with such a constriction relative to the cutting edge of the resulting angle by the negative Fasenwin ⁇ height distance of the boundary curve between the Spanflä ⁇ chenfase to the rake face.
  • the boundary line of the rake face chamfer to the rake face is essentially arcuate. This is understood to mean an embodiment in which the said limit curve runs below this connection line with respect to a connecting line of the limit curve points in the cutting corners.
  • the boundary curve of the rake face chamfer to the rake face or the width of the rake face chamfer preferably runs through a minimum as seen from the cutting corner in the direction of the cutting edges.
  • the rake face bevel angle can always have the same value along the cutting edge, but it can also have different negative bevel angles, as a result of which a further compensation of the "increase" that a running chip passes through can be achieved.
  • the bevel angle changes continuously along the cutting edge, preferably it continuously approaches zero, but always remains negative.
  • the boundary curve between the rake face and the rake face is wave-shaped and / or jagged, at least one of the upper and the lower envelope curve forming an arc with constant curvature.
  • the limit curve can also be irregular or regularly wavy or jagged, but then at least satisfies one of the upper or the lower envelope curves the condition of an arcuate course with uniform curvature.
  • a preferred embodiment of the invention is a piercing tool having a forward main cutting edge and two Mau ⁇ cut with a round rotating Span lakefase which is greater in the two cutting corners as surfaces in the adjacent Berei ⁇ , possibly with the exception of for the cutting operation unommetli ⁇ chen rear Area of the minor cutting edge.
  • the main cutting edge surface bevel between the adjacent cutting corners and / or the secondary cutting edge surface bevel is preferably designed with mirror symmetry with respect to the longitudinal central axis of the plunging tool and / or a perpendicular thereto.
  • the rake face chamfer in the direction perpendicular to the cutting edge:
  • the rake face chamfer can be straight, slightly concave or convex, and / or can be provided with one or more chip mold recesses and / or one or more chip mold elements.
  • bevels in the sense of the application are also to be understood as meaning those areas which adjoin the cutting edges and which are curved with a depth or height of 1/100 - 10/100 mm.
  • a chip breaker can also be provided after the rake face chamfer, or the rake face can be provided with a raised chip breaker with a projecting rib-shaped wedge with a tapering tip as seen in a plan view and in a longitudinal cross-sectional view .
  • All of these additional chip-forming agents are known in principle in the case of cutting inserts according to the prior art and are also to be used in conjunction with the design according to the invention.
  • the cutting insert relates to a thread-turning cutting insert with staggered and stepped cutting corners, the rake chamfer passing through a protruding cutting corner for cutting edge indentation at a minimum.
  • the clearance angle is preferably positive in all the embodiments described, but it can also be 0 °.
  • the cutting insert can also be provided with a circular, closed cutting edge.
  • the boundary curve between the negative chamfer and the adjoining rake face takes up varying distances from the cutting edge, which the maxiuma and minima pass through, preferably four maxima and four minima each.
  • Wedge-shaped and longitudinal rib-shaped raised chip form elements pointing in the radial direction are arranged such that they each point in the direction of a minimum.
  • 1 is a perspective view of a lancing insert
  • FIG. 2 is a side view according to "X" of FIG. 1,
  • FIG. 3 is a partial perspective view of a further cutting insert
  • FIG. 4 is a perspective view of a cutting insert with a front rounded cutting edge
  • FIG. 5 is a plan view of a cutting insert
  • FIG. 6 is a partial perspective of a tapping insert
  • Fig. 8 is a side view of the cutting insert according to Fig. 7 and 9a - k respective versions for different chamfers.
  • the parting-off insert 10 according to FIG. 1 has a main cutting edge 11 which is delimited by two cutting corners 12, followed by respective secondary cutting edges 13 which run towards one another at an acute angle.
  • a chamfer 14 is provided which has a maximum width in the cutting corners 12 and which has a constriction 15 in the adjoining region of both the main cutting edge 11 and the secondary cutting edges 13.
  • the rake face 14 becomes wider again. If the respective constructed points of the interface between the rake face 14 and the rake face 16 are connected by straight lines 17, the degree of constriction, i.e. the reduction of the rake face chamfer width, each clearly. With a negative bevel angle ⁇ (see FIG.
  • the cutting insert has a positive flank angle ⁇ .
  • the rake face 16 may be in the form of a trough 18 (see FIG. 2).
  • the rake face 16 can also have a chip former 19 which has a vertically oriented wedge 20 in the form of a longitudinal rib towards the main cutting edge 11.
  • the cutting insert shown in FIG. 3 is constructed in a corresponding manner, from the perspective view of which it is clear that the rake face chamfer width present in the rear area, which is not essential for the cut, can be greater than the width of the rake face chamfer in the cutting corner area.
  • the rake face width in the rear region essentially depends on the extent to which the rake face chamfer or the sloping part 21 should be included in the direction of the rake face trough 22 as a chip forming element.
  • the main cutting edge 11 is round and merges into the secondary cutting edges 13 without edges.
  • the main cutting edge 11 "takes over" the function a cutting corner, from which it follows that the rake face 14 has a constant width in the region of the main cutting edge. Following this in the area of the secondary cutting edge, the boundary line from the transition of the rake face to the rake face 16 or the relevant slope part is lowered in an arc, ie the rake face width is smaller in this area of the constriction.
  • This cutting insert also has an elongated, raised chip-forming element 19 tapering towards the front with respective wedge-shaped rib pieces 20, which are arranged mirror-symmetrically with respect to the longitudinal central axis of the cutting insert.
  • the off ⁇ formation of these wedges or longitudinal ribs is the subject of DE-P 41 36 417.1, to which reference here.
  • the cutting insert shown in Fig. 5 in a plan view substantially corresponds to the cutting insert of Figure 1 (with the exception of the central chip former), but has. Differed ⁇ Liche chamfer angle ⁇ ⁇ to 013, wherein the chamfer angle along the side cutting edge 13 with increasing distance from the Remove cutting corner 11.
  • the bevel angle decreases to absolutely smaller values in any case up to the area of the constriction, after which the angle can remain the same or increase again or continue to become more negative.
  • FIG. 6 shows a tapping insert 23 with a plurality of cutting corners 24 which are arranged in a staggered manner and in the area of which the rake face 14 has a maximum width in comparison to the other areas. Otherwise, the same parts are identified by the same reference numerals as in the previous figures.
  • FIG. 7 shows a top view of a cutting insert with a closed circular cutting edge, which is followed by a negative rake face chamfer 27.
  • This rake face 27 has a changing width in such a way that it assumes a maximum width on opposite sides (in the drawing above and below and left and right) and runs through a minimum in the areas in between.
  • the limit curve between the negative chamfer 27 and the remaining rake face "drops" relative to the surrounding areas.
  • a chip guiding trough 28 adjoins the negative chamfer, into which chip-shaping elements 29 which project radially outwards protrude.
  • chip form elements point to the respective minimum of the limit curve 15 between the negative chamfer 27 and the remaining chip face.
  • These wedges or longitudinal ribs are also described in DE-P 41 36 417.1, to which reference is made.
  • Fig. 9a to k shows that different shapes for rake chamfers can be provided in the cutting inserts according to the invention.
  • the chamfer according to FIGS. 9a and b has a planar, flat shape 141, whereas the rake face chamfer according to FIGS. 9c and d has a slightly convex shape 142 (the curvature is exaggerated and in practice is 1/100 to 10/100 9e, f.
  • a concave shape 143 with a convexity of 1/100 to 10/100 mm has the rake face chamfer according to Fig. 9e, f.
  • rake face shapes mentioned above can be combined with troughs 25 in the area of the rake face chamfer 9i and k, raised chip-form elements 26 can be arranged on the rake face 14, preferably perpendicularly or at an acute angle to the cutting edge and in an elongated wedge-shaped rib shape.

Abstract

L'invention concerne une plaquette (10) comportant une lisière sur face (14) négative qui se raccorde aux arêtes coupantes (11, 13), qui s'utilise notamment pour des usinages radiaux. Afin de minimiser l'effort de coupe total qui en résulte, la largeur de la lisière sur face (14), par rapport à la zone de coupe, la largeur de la lisière sur face (14) doit être maximale dans au moins un coin des arêtes coupantes (12) ou dans la zone d'un tranchant principal rond.
EP94908975A 1993-03-29 1994-03-11 Plaquette de coupe Withdrawn EP0691897A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4310131 1993-03-29
DE4310131A DE4310131A1 (de) 1993-03-29 1993-03-29 Schneideinsatz
PCT/DE1994/000274 WO1994022621A1 (fr) 1993-03-29 1994-03-11 Plaquette de coupe

Publications (1)

Publication Number Publication Date
EP0691897A1 true EP0691897A1 (fr) 1996-01-17

Family

ID=6484119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908975A Withdrawn EP0691897A1 (fr) 1993-03-29 1994-03-11 Plaquette de coupe

Country Status (6)

Country Link
EP (1) EP0691897A1 (fr)
JP (1) JPH08508211A (fr)
KR (1) KR960701718A (fr)
CA (1) CA2159477A1 (fr)
DE (1) DE4310131A1 (fr)
WO (1) WO1994022621A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501913C2 (sv) * 1993-10-21 1995-06-19 Sandvik Ab Skär för skärande verktyg
DE19527696A1 (de) * 1995-07-28 1997-01-30 Widia Gmbh Stecheinsatz
DE69903110T2 (de) * 1998-04-17 2003-01-23 Matsushita Electric Ind Co Ltd Funkübertragungsgerät und verfahren zur kontrolle der übertragungsrate
DE19913088A1 (de) * 1999-03-23 2000-09-28 Widia Gmbh Schneidplatte und Kugelkopffräswerkzeug
SE519602C2 (sv) * 1999-09-16 2003-03-18 Sandvik Ab Skär för spårsvarvningsoperationer med konkav central bottenyta
DE102004003757B4 (de) * 2004-01-23 2009-05-07 Jakob Lach Gmbh & Co. Kg Schneidkopf für ein Profil-Drehwerkzeug, sowie ein Verfahren zur Herstellung einer konkav eingesenkten Spanfläche
US10076788B2 (en) * 2014-05-20 2018-09-18 Iscar, Ltd. Cutting insert with chip-control arrangement
JP6798663B2 (ja) * 2016-04-27 2020-12-09 住友電工ハードメタル株式会社 切削インサート
KR101901755B1 (ko) * 2017-03-30 2018-09-28 한국야금 주식회사 고이송 편면형 절삭 인서트 및 이를 장착한 절삭 공구
JP6936975B2 (ja) * 2018-12-28 2021-09-22 株式会社タンガロイ 切削インサート及び切削工具
JP6728428B1 (ja) * 2019-02-28 2020-07-22 株式会社タンガロイ 切削インサート及び切削工具
DE102019121468A1 (de) * 2019-08-08 2021-02-11 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Schneidplatte und Werkzeug mit einer solchen Schneidplatte

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Publication number Priority date Publication date Assignee Title
US3279034A (en) * 1964-12-17 1966-10-18 Ingersoll Milling Machine Co Indexable cutter blade
US3279035A (en) * 1964-12-18 1966-10-18 Ingersoll Milling Machine Co Indexable cutter blade
FR2227927A1 (en) * 1973-05-02 1974-11-29 Prost Daniel Reground disposable slicing discs - have geometric form cutting edges regenerated and are then reused
IL58861A (en) * 1979-12-04 1981-11-30 Iscar Ltd Interchangeable insert with a chip breaker
SU1119783A1 (ru) * 1983-07-11 1984-10-23 Skochko Evgenij V Отрезной резец
JPS60186311A (ja) * 1984-03-02 1985-09-21 Toshiba Tungaloy Co Ltd 仕上げ用の正面フライス
SU1414509A1 (ru) * 1985-12-03 1988-08-07 Е.В. Скочко Отрезной резец
SE452273B (sv) * 1986-05-07 1987-11-23 Seco Tools Ab Sker for avstickning
IL84171A (en) * 1987-10-14 1990-09-17 Iscar Ltd Cutting insert and tool holder therefor
DE3823199A1 (de) * 1988-07-08 1990-01-11 Feldmuehle Ag Schneidplatte fuer spanabhebende bearbeitung
SU1602615A1 (ru) * 1988-12-05 1990-10-30 Предприятие П/Я Р-6564 Режущий инструмент
SE469215B (sv) * 1989-06-22 1993-06-07 Seco Tools Ab Skaer vars spaanformande yta aer foersedd med urtagningar vinklade mot skaereggen.
SE466689B (sv) * 1990-07-19 1992-03-23 Sandvik Ab Skaer foer profil- och spaarsvarvning
US5145294A (en) * 1991-03-15 1992-09-08 National Carbide Outlet, Inc. Milling cutter capable of using indexable inserts of various shapes
IL97746A (en) * 1991-04-02 1995-01-24 Iscar Ltd Metal cutting tool

Non-Patent Citations (1)

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Title
See references of WO9422621A1 *

Also Published As

Publication number Publication date
JPH08508211A (ja) 1996-09-03
WO1994022621A1 (fr) 1994-10-13
CA2159477A1 (fr) 1994-10-13
DE4310131A1 (de) 1994-10-06
KR960701718A (ko) 1996-03-28

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