EP0102843A2
Expired / Lapsed
EP
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Tool inserts
Assignee: De Beers Industrial Diamond Division Pty Ltd
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Filing: 1983-09-05
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Granted: —
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Expires: 2003-09-05
Abstract
Abstract A tool insert, particularly for a turning or milling tool, comprising a cubic boron nitride compact having a thin, wear-resistant refractory layer bonded thereto and presenting a cutting edge. The refractory is preferably titanium nitride, titanium carbide or a mixture thereof. The insert is particularly useful for the cutting of ferrous material having a Rockwell C Hardness of less than 45.
Inventors
- 👤 Henry Brooke Dyer
- 👤 Roger John Wedlake
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:12
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2239; B23C5/2243; B23B; B23B27/00; B23B27/14; B23B27/16; B23B27/1625; B23B27/164; B23C5/202; C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5053; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C23; C23C; C23C30/00; C23C30/005; B23B2200/00; B23B2200/04; B23B2200/0461; B23B2224/00; B23B2224/28; B23B2224/32; B23B2224/36; B23C2200/00; B23C2200/04; B23C2200/045; B23C2222/00; B23C2222/28; B23C2224/00; B23C2224/04; B23C2226/00; B23C2226/12; B23C2226/125; B23C2226/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
55 words
A tool insert comprising a cubic boron nitride compact comprising a polycrystalline mass of cubic boron nitride particles, present in an amount of at least 70 percent by volume, bonded into a hard conglomerate, and a thin wear-resistant layer of a refractory bonded to a surface thereof and presenting a cutting edge for the insert.
Claim 2
Dependent Claim
55 words
A tool insert comprising a cubic boron nitride compact comprising a polycrystalline mass of cubic boron nitride particles, present in an amount of at least 70 percent by volume, bonded into a hard conglomerate, and a thin wear-resistant layer of a refractory bonded to a surface thereof and presenting a cutting edge for the insert.
Claim 3
Dependent Claim
19 words
A tool insert according to claim 1 wherein the wear-resistant layer has a thickness of less than 50 micrometres.
Claim 4
Dependent Claim
19 words
A tool insert according to claim 1 wherein the wear-resistant layer has a thickness of less than 20 micrometres.
Claim 5
Dependent Claim
31 words
A tool insert according to any one of the preceding claims wherein the refractory is a nitride, boride, carbide, carbonitride, silicide, phosphide, or oxide of a transition metal, aluminium or silicon.
Claim 6
Dependent Claim
29 words
.5. A tool insert according to any one of claims 1 to 3 wherein the refractory is selected from the group of titanium nitride, titanium carbide, and mixtures thereof.
Claim 7
Dependent Claim
22 words
A tool insert according to any one of the preceding claims wherein the wear-resistant layer contains more than one type of refractory.
Claim 8
Dependent Claim
24 words
A tool insert according to any one of the preceding claims wherein the cubic boron nitride compact is bonded to a cemented carbide support.
Claim 9
Dependent Claim
16 words
A tool insert according to claim 7 wherein the cemented carbide support is cemented tungsten carbide.
Claim 10
Dependent Claim
15 words
A tool insert according to any one of the preceding claims which has a disc-shape.
Claim 11
Dependent Claim
27 words
A tool insert according to any one of claims 1 to 8 which has a rectangular shape and the cutting edge is provided by the corners thereof.
Claim 12
Dependent Claim
27 words
A tool insert according to any one of claims 1 to 8 which has a triangular shape and the cutting edge is provided by the corners thereof.
Claim 13
Dependent Claim
18 words
A tool insert according to any one of the preceding claims for use in a cutting tool. -
Claim 14
Dependent Claim
22 words
A cutting tool comprising supporting body having secured thereto at least one tool insert according to any one of the preceding claims.
Claim 15
Dependent Claim
16 words
A tool according to claim 13 wherein the tool insert is clamped to the supporting body.
Claim 16
Dependent Claim
16 words
A tool according to claim 13 wherein the tool insert is brazed to the support body.
Claim 17
Independent Claim
74 words
A method of cutting a workpiece made of a ferrous material having a Rockwell C Hardness of less than 45 including the steps of providing a cutting tool according to any one of the preceding claims 13 to 15, the insert of which presents its refractory cutting edge to the workpiece, causing the cutting edge to contact the workpiece, and moving the workpiece relative to the cutting edge to remove material from the workpiece.
Claim 18
Dependent Claim
18 words
A method according to claim 16 wherein the workpiece is caused to rotate relative to the cutting edge.
Claim 19
Dependent Claim
20 words
A method according to claim 17 wherein the workpiece is rotated at a peripheral- speed of at least 50 metres/minute.
References Cited (Backward Citations)
No citation records indexed.
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