WO2003070404A1 - Plaquette de coupe rapportee a rainure a copeaux - Google Patents

Plaquette de coupe rapportee a rainure a copeaux Download PDF

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Publication number
WO2003070404A1
WO2003070404A1 PCT/EP2003/001703 EP0301703W WO03070404A1 WO 2003070404 A1 WO2003070404 A1 WO 2003070404A1 EP 0301703 W EP0301703 W EP 0301703W WO 03070404 A1 WO03070404 A1 WO 03070404A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting insert
cutting
insert
insert according
chip
Prior art date
Application number
PCT/EP2003/001703
Other languages
German (de)
English (en)
Inventor
Claus Dunklau
Wolfgang Zitzlaff
Original Assignee
Ceramtec Ag
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 Ceramtec Ag filed Critical Ceramtec Ag
Priority to AU2003208881A priority Critical patent/AU2003208881A1/en
Publication of WO2003070404A1 publication Critical patent/WO2003070404A1/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
    • B23B2200/00—Details of cutting inserts
    • B23B2200/08—Rake or top surfaces
    • B23B2200/086—Rake or top surfaces with one or more grooves
    • B23B2200/087—Rake or top surfaces with one or more grooves for chip breaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/28—Angles

Definitions

  • the invention relates to a cutting insert, in particular an indexable insert for machining metal workpieces with a clamping surface for clamping in a cutting tool and a cutting edge for machining.
  • EP 0 075 177 discloses a ceramic indexable insert for clamping in a cutting tool for machining cast materials, in particular cast iron.
  • the cutting insert On its upper side, the cutting insert contains a trough or clamping surface for engaging a clamping claw or a clamping finger of a cutting tool, each corner of the indexable insert having a cutting edge.
  • the cutting tool therefore consists of a clamp holder and an interchangeable insert to be inserted into the clamp holder.
  • the insert is the part that engages the workpiece and processes it.
  • the insert must therefore be made of extremely hard material that has the least possible abrasion when machining metallic workpieces.
  • oxide-ceramic materials such as aluminum oxide or zirconium oxide.
  • Such ceramic materials have a very high hardness and compressive strength, but only a limited tensile strength.
  • the invention is based on the object of improving a cutting insert according to the preamble of claim 1 in such a way that the cutting edge has an extended service life.
  • this object is achieved in that a chip trough is arranged adjacent to the cutting edge, which deflects the chips or redirects without deforming it.
  • the service life of the cutting edge is significantly extended, since the chips produced are deflected as soon as they arise and so cannot damage the tool holder or the cutting edge.
  • this object is achieved in a first embodiment in that the cutting edge is curved in the direction of the lower cutting edge and in that a chip recess, which is also curved and runs out into a cutting plate side, is arranged parallel to the cutting edge.
  • the chip recess running in the direction of the lower edge of the insert and the curved cutting edge serve to guide the chips separated from the workpiece during machining.
  • the insert is mounted in a suitable holder, here called insert seat, of a carrier tool by means of a wedge clamping.
  • the chips do not deform.
  • Another feature is the surface that slopes from the rear end of the chip trough to the center of the insert, which is to serve as a clamping surface in the carrier tool.
  • the clamping surface advantageously drops at an angle of 1 ° to 10 °, preferably 3 °, towards the center of the insert.
  • the deepest point of the chip trough is arranged at a distance L from the insert side, this distance L being approximately half the total usable length of the chip trough.
  • the contour of the chip trough preferably runs in an arc around a point P and this point is arranged at a distance R from the top of the insert and at a distance L from the side of the insert.
  • This distance R is advantageously between 10 mm to 30 mm.
  • the rake angle w1 is preferably between 5 ° and 25 ° and runs towards the center of the insert.
  • the chip trough merges into the clamping surface over two transition radii and these transition radii are in the range from 1 mm to 3 mm.
  • this object is achieved in a second embodiment in that the cutting insert has a chip recess behind the cutting edge, which is both inclined to the cutting edge and inclined to the top of the cutting insert.
  • the chip recess lying at an angle to the cutting edge and at an angle to the top of the insert serves to guide the chips separated from the workpiece during machining.
  • the insert is mounted in a suitable holder, here called insert seat, of a carrier tool by means of a wedge clamping.
  • the chips do not deform.
  • Another feature is the surface that falls from the rear end of the chip trough to the center of the insert, which is to serve as a clamping surface in the carrier tool.
  • the clamping surface advantageously drops at an angle w14 of 1 ° to 10 °, preferably 3 °, towards the center of the insert.
  • the chip trough runs at an angle w10 of 5 ° to 50 °, preferably 30 ° to the cutting edge.
  • the chip trough preferably extends at an angle w13 of 2 ° to 8 ° to the top of the insert.
  • the rake angle w12 is preferably between 4 ° and 12 °.
  • the chip trough merges into the clamping surface over two transition radii and these transition radii are in the range from 1 mm to 3 mm.
  • the cutting insert according to the invention is preferably used for machining cast materials.
  • FIG. 3 shows the section A-A of Fig. 2
  • FIG. 12 is a plan view of the cutting insert according to the invention according to FIG. 10,
  • Fig. 15 is a schematic cross section through the insert and 16 the cutting insert according to the invention clamped in a carrier tool.
  • FIG. 1 shows a view of a cutting plate 10 according to the invention and FIG. 2 shows a top view of the cutting plate 10.
  • the chip recess 12 which runs parallel to the cutting edge 11 and is present 4x in the circumference of a square cutting plate 10, can be clearly seen.
  • a special feature of the chip trough 12 is that it runs in an arc shape to the underside of the insert 17 and that its lowest point runs at a parallel distance (L) from the outer edge of the insert 10. This distance (L) should make up about half of the total usable length of the chip recess 12.
  • the total usable length of the chip recess 12 is to be equated with the desired depth of cut of the cutting plate 10 on the carrier tool.
  • the characteristic of the arcuate course is further explained in FIG. 4.
  • the rake angle w1 which lies between 5 ° and 25 ° and runs towards the center of the insert 14, is to be mentioned here as a special feature in this cross section.
  • the rake angle w1 changes into a radius, which then runs out into the insert surface or clamping surface 15 by means of a further radius.
  • the rake angle w1 results in a smaller wedge angle ß of the insert, which means that the smaller wedge angle enables a positive working geometry, ie a “softer” cut, ie easier machining. This improves the machining of unstable or thin-walled workpieces or use on processing machines with lower machine performance.
  • the front view of the cutting plate 10 is shown.
  • Fig. 5 shows again a schematic cross section through the cutting plate.
  • a special feature here is the clamping surface 15, which slopes away from the center 14 of the insert at an angle w4 of approximately 1 ° to 10 °.
  • This clamping surface 15, the angle of which is preferably 3 °, has the task of clamping the cutting plate in a carrier tool by means of a clamping wedge 16, as shown in FIG. 6.
  • a particular feature here is the design of the clamping surface 15 at the angle w4, which, in addition to the non-positive component of the clamping wedge 16, adds a positive component which is intended to prevent the cutting insert in the cutting insert from moving out of a fitting seat suitable for it.
  • FIG. 10 shows a view of an alternative cutting plate 110 according to the invention and FIG. 12 shows the top view of this cutting plate 110.
  • the obliquely running chip recess 112 which is provided 4x in the case of a square cutting plate 110, can be clearly seen.
  • a special feature is that their direction runs obliquely, at an angle w10 to the cutting edge 111.
  • the angle w10 should be in the range 5 ° - 50 °, preferably 30 °.
  • Another feature of this chip trough is that it has an additional oblique course to the top of the cutting insert 116. This slope runs at the angle w13 along the section line BB, which can be seen in FIG. 13.
  • the angle w13 depends on the rake angle w12 and should be in the range of 2 ° to 8 °.
  • the actual rake angle w12 runs along the section line AA is arranged perpendicular to the section line BB. This rake angle w12 is further described in FIG. 14.
  • the rake surface 112 thus forms a triangular surface, one corner of this triangular surface being formed by the corner of the cutting plate and the two other corners of the triangular surface being arranged on the sides adjacent to the corner of the cutting plate.
  • the deepest point of the chip trough 112 is on the side facing away from the cutting edge 111.
  • the rake angle w12 shows the rake angle w12 and its course in the direction of the insert center 114.
  • a special feature of the rake angle w12 is its inclination, which is preferably between 4 ° and 12 °.
  • the rake angle w12 merges into a radius 113, which then runs out into the upper side 116 of the insert or the clamping surface 115 by means of a further radius.
  • the rake angle w12 results in a smaller wedge angle ß of the insert, which has the consequence that the smaller wedge angle enables a positive working geometry, ie a “softer” cut, and thus easier machining. This improves the machining of unstable or thin-walled workpieces or use on processing machines with lower machine performance.
  • a special feature here is the clamping surface 115, which slopes away from the center of the insert 114 at an angle w14 of approximately 1 ° to 10 °.
  • This clamping surface 115 the angle of which is preferably 3 °, has the task of clamping the cutting plate 110 in a carrier tool by means of a clamping wedge 117, as shown in FIG. 16.
  • the design of the clamping surface 115 at the angle w14, which is in addition to the non-positive component of the clamping wedge 117 adds a positive component, which is intended to prevent the cutting insert in the cutting insert from being moved out of a suitable insert seat.

Landscapes

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

Abstract

L'invention concerne une plaquette de coupe rapportée, en particulier une plaquette de coupe réversible pour l'usinage, avec enlèvement de copeaux, de pièces métalliques, comprenant une surface de fixation (15) pour le serrage dans un outil de coupe (16) et une arête de coupe (11) pour l'usinage avec enlèvement de copeaux. Afin d'améliorer la durée de service de l'arête de coupe, une rainure de copeaux (12) est disposée à proximité de l'arête de coupe (11) qui détourne ou dévie les copeaux sans déformation de ceux-ci.
PCT/EP2003/001703 2002-02-25 2003-02-20 Plaquette de coupe rapportee a rainure a copeaux WO2003070404A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003208881A AU2003208881A1 (en) 2002-02-25 2003-02-20 Cutting insert comprising a chip groove

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE10208083.6 2002-02-25
DE10208084.4 2002-02-25
DE10208083 2002-02-25
DE10208084 2002-02-25
DE10238442 2002-08-22
DE10238442.8 2002-08-22
DE10244990.2 2002-09-26
DE10244990 2002-09-26

Publications (1)

Publication Number Publication Date
WO2003070404A1 true WO2003070404A1 (fr) 2003-08-28

Family

ID=27761466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/001703 WO2003070404A1 (fr) 2002-02-25 2003-02-20 Plaquette de coupe rapportee a rainure a copeaux

Country Status (3)

Country Link
AU (1) AU2003208881A1 (fr)
DE (1) DE10307092A1 (fr)
WO (1) WO2003070404A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080034A1 (fr) * 2004-02-17 2005-09-01 Kennametal Inc. Matrice de decoupage, notamment pour un outil d'alesage
JP2013107154A (ja) * 2011-11-18 2013-06-06 Mitsubishi Materials Corp 切削インサート
US20180009040A1 (en) * 2015-02-24 2018-01-11 Tungaloy Corporation Cutting tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870523A (en) * 1956-08-10 1959-01-27 Theophile J La Lime Cutting tools
US3395434A (en) * 1966-06-01 1968-08-06 Sandvikens Jernverks Ab Cutting insert for chip cutting machining
US3800379A (en) * 1972-08-02 1974-04-02 Valeron Corp Cutting insert
EP0577011A1 (fr) * 1992-07-01 1994-01-05 Sumitomo Electric Industries, Ltd. Plaquette de coupe et fraise
US6244791B1 (en) * 1997-06-30 2001-06-12 Sandvik Ab Indexable cutting insert

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870523A (en) * 1956-08-10 1959-01-27 Theophile J La Lime Cutting tools
US3395434A (en) * 1966-06-01 1968-08-06 Sandvikens Jernverks Ab Cutting insert for chip cutting machining
US3800379A (en) * 1972-08-02 1974-04-02 Valeron Corp Cutting insert
EP0577011A1 (fr) * 1992-07-01 1994-01-05 Sumitomo Electric Industries, Ltd. Plaquette de coupe et fraise
US6244791B1 (en) * 1997-06-30 2001-06-12 Sandvik Ab Indexable cutting insert

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080034A1 (fr) * 2004-02-17 2005-09-01 Kennametal Inc. Matrice de decoupage, notamment pour un outil d'alesage
JP2013107154A (ja) * 2011-11-18 2013-06-06 Mitsubishi Materials Corp 切削インサート
US20180009040A1 (en) * 2015-02-24 2018-01-11 Tungaloy Corporation Cutting tool
US10486239B2 (en) * 2015-02-24 2019-11-26 Tungaloy Corporation Cutting tool

Also Published As

Publication number Publication date
DE10307092A1 (de) 2003-11-13
AU2003208881A1 (en) 2003-09-09

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