EP3227040A1 - Géométrie de plaque de coupe - Google Patents

Géométrie de plaque de coupe

Info

Publication number
EP3227040A1
EP3227040A1 EP15804528.6A EP15804528A EP3227040A1 EP 3227040 A1 EP3227040 A1 EP 3227040A1 EP 15804528 A EP15804528 A EP 15804528A EP 3227040 A1 EP3227040 A1 EP 3227040A1
Authority
EP
European Patent Office
Prior art keywords
cutting
edge
clearance angle
clamping
corners
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Withdrawn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
EP15804528.6A
Other languages
German (de)
English (en)
Inventor
Alexander KIEMELE
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP3227040A1 publication Critical patent/EP3227040A1/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Withdrawn legal-status Critical Current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
    • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
    • 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
    • B23B2200/049—Triangular
    • 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
    • B23B2200/088—Rake or top surfaces with one or more grooves for clamping
    • 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
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/24—Cross section of the cutting edge
    • B23B2200/242—Cross section of the cutting edge bevelled or chamfered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/18—Ceramic

Definitions

  • the invention relates to a cutting insert for installation in carrier tools for machining workpieces with a top and a bottom and with the top and bottom connecting side surfaces, wherein at the transition from the top to the side surfaces a circumferential protective chamfer with an adjacent to the top of the cutting plate Upper edge and a lower edge adjacent to the side surfaces is formed, wherein the upper edge forming cutting edges and cutting corners and merges the lower edge in the region of the cutting edges in a cutting edge clearance angle surface with an edge clearance angle of 3 ° to 1 1 °.
  • edge relief angle 3 °, 5 °, 7 ° or 1 1 °.
  • the edge relief angle is always formed circumferentially, with or without drag blade (colloquially also called wiper).
  • the material is removed by a lateral approach with a small angle of attack. Due to the "sharp edge" there is a low edge stability.
  • the invention has the object of developing a cutting plate according to the preamble of claim 1 so that the edge stability is improved when pulling section.
  • this object is achieved in that, in the region of the cutting corners, the lower edge of the protective chamfer merges into a corner clearance angle surface with an edge clearance angle of 3 ° to 5 °.
  • the service life of the cutting plate is significantly improved because a stable edge occurring Cutting pressure better intercept and thus the cutting plate is less prone to micro-breakouts on the cutting edge, which ultimately adversely affects the performance.
  • the cutting plate is preferably made of PCBN or a CBN composite material, but may for example also consist of an oxide ceramic, nitride ceramic or mixed ceramic.
  • the embodiment of the cutting plate can be made as a solid material, surface occupied as well as edge- or corner-mounted.
  • the corner radius is between 0.2 and 3.2 mm, preferably between 0.4 and 1.2 mm and most preferably at 0.8 mm. The best results were achieved between 0.4 and 1, 2 mm, especially at 0.8mm.
  • a drag blade colloquially also called wiper, arranged on the one hand to the lower edge of the protective bevel and on the other hand at the corner clearance angle surfaces and the cutting edge clearance angle surfaces adjacent, the length of the Drag blade at the lower edge of the protective chamfer between 0.2 and 1, 0 mm, preferably between 0.4 and 0.8 mm and particularly preferably 0.5 mm.
  • the length of the trailing edge significantly determines the required surface of the workpiece and the possible feed rate.
  • the transition of the corner clearance angle surface to the drag blade can be formed as a radius transition or as a tangent between corner radius and cutting edge edge on the top of the cutting plate.
  • the cutting plate has two to eight cutting corners, preferably three or four cutting corners and very particularly preferably three cutting corners. So that the cutting plate can be clamped in a tool holder, a first circular clamping recess is preferably arranged on the upper side, ie rake face, which has a spherical or circular elevation in the middle, the point of which lies below the rake face. With such clamping troughs, the best anchorages can be achieved. Furthermore, the design of the cutting plate voltage can also correspond to the standard voltages specified in the designation system of ISO 1832 (dated 05.12.2014).
  • a second clamping trough is arranged coaxially to the first clamping trough, wherein the first clamping trough lower than the second clamping trough and both clamping troughs are arranged lower than the rake face.
  • the use of the cutting insert according to the invention for machining of cast, composite and steel materials is preferred.
  • the insert according to the invention is characterized by a new design of the cutting edge, through which the service life can be significantly improved, since a stable edge can better absorb the occurring cutting pressure and thus the insert tends less to break out.
  • the tension of the cutting plate in the holder can be designed as a clamping trough according to EP 1 414 607 B1 in combination with EP 1 536 903 B1 or as part of the ISO standard (ISO 1832 of 05.12.2014) clamping devices.
  • a trough is incorporated, which is described in WO 03/013770 A1.
  • the trough is circular and has a spherical or circular elevation in the middle.
  • the top of the survey is above the trough bottom and below the cutting plate top.
  • the trough is formed as described in EP 1 536 903 B1.
  • a first clamping recess for clamping is introduced into the cutting tool and coaxially to the first clamping recess, a second clamping recess is arranged, wherein the first clamping recess are arranged lower than the second clamping recess and both lower than the cutting plate top.
  • the distance from the bearing surface of the clamping claw to the trough is thus always constant and is not dependent on lapping or grinding of the cutting top surfaces.
  • the advantage of the embodiment according to the invention lies essentially in the "area with a smaller clearance angle", by means of which the cutting edge is stabilized and the service life is increased in the machining strategy despite the use of the same cutting material.
  • the insert can also be used with an ISO standard clamping device in the usual tool holders on the market.
  • the cutting insert according to the invention is explained in detail.
  • FIG. 1 shows an insert 1 according to the invention with a top 2 and a bottom 3 made of a ceramic material with three corners, each with a corner radius 10.
  • the corner radius 10 is 0.8 mm in this case, but is otherwise between 0.2 and 3 , 2 mm.
  • On the upper side 2 of the cutting plate 1 is a rake surface 14, on which a first circular clamping recess 15 is arranged, which has a spherical or circular elevation 17 in the middle, the top lies below the clamping surface 14.
  • This clamping recess 15 is used for clamping on a cutting tool, not shown here.
  • a second clamping recess 16 is arranged, wherein the first clamping recess 15 are deeper than the second clamping recess 16 and both 15, 16 are arranged deeper than the clamping surface 14.
  • a clamping claw of the tool rests on the second clamping recess and, for example, engages with a nose in the first clamping recess.
  • the distance from the bearing surface of the clamping claw to the trough is thus always constant and is not dependent on lapping or grinding of the cutting top surfaces.
  • a circumferential protective chamfer 5 On the transition from the rake surface 14 to the peripheral surface 4 is a circumferential protective chamfer 5 with an adjacent to the top 2 of the cutting plate 1 Upper edge 6 and arranged adjacent to the side surfaces 4 lower edge 7.
  • the upper edge 6 of the protective chamfer 5 forms the cutting edge 9 and the cutting corners 10.
  • the lower edge 7 of the protective chamfer 5 is in the region of the cutting edges 9 in a cutting edge clearance angle surface 8 with an edge clearance angle of 3 ° to 1 1 °.
  • the lower edge 7 of the protective chamfer 5 merges into a corner clearance angle surface 11 with an edge clearance angle of 3 ° to 5 °.
  • a drag blade 13 is disposed adjacent to the lower edge 7 of the protective chamfer 5 and on the other hand to the corner clearance surface 1 and the cutting edge clearance angle surface 8, wherein the length of the drag blade 13th at the lower edge 7 of the protective chamfer 5 between 0.2 and 1, 0 mm.
  • reference numeral 18 shows the area with a smaller clearance angle.
  • This insert is preferably used for machining of cast, composite and steel materials.

Landscapes

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

Abstract

L'invention concerne une plaque de coupe (1), destinée à être installée dans des outils de support pour l'usinage de pièces par enlèvement de copeaux, qui comprend un côté supérieur (2) et un côté inférieur (3) et des faces latérales (4) qui relient le côté supérieur (2) et le côté inférieur (3) entre eux ; un chanfrein de protection circonférentielle (5) pourvu d'un bord supérieur (6) adjacent au côté supérieur (2) de la plaque de coupe (1) et d'un bord inférieur (7) adjacent aux faces latérales (4), est disposé au niveau de la transition du côté supérieur (2) vers les faces latérales (4), le bord supérieur (6) formant des arêtes de coupe (9) et des coins de coupe (10) et le bord inférieur (7) se transformant au niveau des arêtes de coupe (9) en une surface d'angle de dépouille d'arête de coupe (8) avec un angle de dépouille de bord de 3° à 11°. Selon l'invention, pour améliorer la stabilité des arêtes pendant une coupe tirante, le bord inférieur (7) du chanfrein de protection (5) se transforme, au niveau des coins de coupe (10), en une surface d'angle de dépouille de coin (11) avec un angle de dépouille de bord de 3° à 5°.
EP15804528.6A 2014-12-05 2015-12-04 Géométrie de plaque de coupe Withdrawn EP3227040A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225035 2014-12-05
PCT/EP2015/078611 WO2016087628A1 (fr) 2014-12-05 2015-12-04 Géométrie de plaque de coupe

Publications (1)

Publication Number Publication Date
EP3227040A1 true EP3227040A1 (fr) 2017-10-11

Family

ID=54780334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15804528.6A Withdrawn EP3227040A1 (fr) 2014-12-05 2015-12-04 Géométrie de plaque de coupe

Country Status (5)

Country Link
US (1) US10307828B2 (fr)
EP (1) EP3227040A1 (fr)
CN (1) CN107000070B (fr)
DE (1) DE102015224276A1 (fr)
WO (1) WO2016087628A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT3242764T (pt) * 2015-01-09 2022-03-08 Ceram Gmbh Ferramenta de transporte
AT15155U1 (de) * 2016-02-26 2017-01-15 Ceratizit Austria Gmbh Schälplatte
US11701715B2 (en) * 2017-09-27 2023-07-18 Kyocera Corporation Cutting insert, cutting tool, and method for manufacturing machined product

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Also Published As

Publication number Publication date
WO2016087628A1 (fr) 2016-06-09
CN107000070B (zh) 2019-06-18
CN107000070A (zh) 2017-08-01
DE102015224276A1 (de) 2016-06-09
US10307828B2 (en) 2019-06-04
US20170341154A1 (en) 2017-11-30

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