Patent EP0214795A1 successfully refreshed from Google Patents.
EP0214795A1
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Tool Component
Assignee: De Beers Industrial Diamond Division Pty Ltd
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Filing: 1986-08-21
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Granted: —
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Expires: 2006-08-21
Abstract
Abstract A tool component is provided which comprises an abrasive compact bonded to a cemented carbide support body. The abrasive compact has two zones which are joined by an interlocking, common boundary. The one zone provides the cutting edge or point forthe tool component while the other zone is bonded to the cemented carbide support body. In use, the tool component is so located in the working surface of the tool that the lower zone is partially embedded in that surface. The interlocking, common boundary is located above the working surface.
Inventors
- 👤 Cornelius Phaal
- 👤 Richard Patrick Burnand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:10
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/573; E21B10/5735; B; B22; B22F; B22F7/00; B22F7/06; B23; B23P; B23P15/00; B23P15/28; B23P5/00; B22F2999/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
154 words
- A tool component comprising an abrasive compact bonded to a cemented carbide support body. the abrasive compact comprising: a polycrystalline mass of ultra-hard abrasive particles bonded into a hard conglomerate and containing at least 70 percent by volume of ultra-hard abrasive particles, a major surface on each of opposite sides thereof, one major surface presenting a cutting edge or point for the tool component, the other major surface being bonded to the cemented carbide support body, two zones joined by an interlocking, common boundary, one zone being produced from ultra-hard abrasive particles and extending from the common boundary to the major surface providing the cutting edge or point, and the second zone being produced from a mixture of ultra-hard abrasive particles and carbide particles or ultra-hard abrasive particles coarser than those used for producing the first zone and extending from the common boundary to the major surface bonded to the cemented carbide support.
Claim 2
Dependent Claim
154 words
- A tool component comprising an abrasive compact bonded to a cemented carbide support body. the abrasive compact comprising: a polycrystalline mass of ultra-hard abrasive particles bonded into a hard conglomerate and containing at least 70 percent by volume of ultra-hard abrasive particles, a major surface on each of opposite sides thereof, one major surface presenting a cutting edge or point for the tool component, the other major surface being bonded to the cemented carbide support body, two zones joined by an interlocking, common boundary, one zone being produced from ultra-hard abrasive particles and extending from the common boundary to the major surface providing the cutting edge or point, and the second zone being produced from a mixture of ultra-hard abrasive particles and carbide particles or ultra-hard abrasive particles coarser than those used for producing the first zone and extending from the common boundary to the major surface bonded to the cemented carbide support.
Claim 3
Dependent Claim
23 words
A tool component according to claim 1 wherein the two major surfaces of the abrasive compact are separated by two to four millimetres.
Claim 4
Dependent Claim
28 words
A tool component according to claim 1 or claim 2 wherein the distance between the common boundary and each of the two major surfaces is about the same.
Claim 5
Dependent Claim
28 words
A tool component according to any one of the preceding claims wherein the size of the particles used for producing the first zone are less than 75 microns.
Claim 6
Dependent Claim
34 words
A tool component according to any one of the preceding claims wherein the particles used for producing the second zone are ultra-hard abrasive particles having a size in the range 100 to 150 microns.
Claim 7
Dependent Claim
40 words
A tool component according to any one of the preceding claims wherein the major surface bonded to the cemented carbide support body is inwardly stepped providing a peripheral region in the support body in which the second zone is located.
Claim 8
Dependent Claim
19 words
A tool component according to any one of the preceding claims wherein the ultra-hard abrasive particles are diamond particles.
Claim 9
Dependent Claim
44 words
A tool comprising a working surface and a tool component according to any one of the preceding claims located in the working surface such that it presents a cutting edge or point for the tool and the abrasive compact extends below the working surface.
Claim 10
Dependent Claim
27 words
A tool according to claim 8 wherein the tool component is located in the working surface such that the common boundary is located above the working surface.
Claim 11
Dependent Claim
19 words
A tool according to claim 8 or claim 9 which is a drill bit. mining pick or cutting tool.
Claim 12
Dependent Claim
143 words
A method of making a tool component according to claim 1 including the steps of: providing a cemented carbide support body having major flat surfaces on each of opposite sides thereof, forming a cavity in one of the major surfaces, placing a first layer comprising ultra-hard particles in the cavity, placing a second layer of ultra-hard abrasive particles on the first layer, the ultra-hard abrasive particles of this layer being finer than those of the first layer, placing the loaded carbide body in the reaction zone of a high pressure/high temperature apparatus, - subjecting the loaded carbide body to conditions of elevated temperature and pressure suitable for compact manufacture, allowing the conditions to return to ambient, recovering the carbide body from the reaction zone, and removing carbide from the sides of the body to expose side surfaces of the thus formed abrasive compact.
Claim 13
Dependent Claim
134 words
A method of making a tool component according to claim 1 including the steps of: providing a cemented carbide support body having major flat surfaces on each of opposite sides thereof, forming a cavity in one of the major surfaces, placing a first layer comprising a mixture of ultra-hard abrasive particles and carbide particles in the cavity, placing a second layer of ultra-hard abrasive particles on the first layer, placing the loaded carbide body in the reaction zone of a high pressure/high temperature apparatus. subjecting the loaded carbide body to conditions of elevated temperature an pressure suitable for compact manufacture. allowing the conditions to return to ambient. recovering the carbide body from the reaction zone. and removing carbide from the sides of the body to expose side surfaces of the thus formed abrasive compact.
Claim 14
Dependent Claim
27 words
A method of claim 11 or claim 12 wherein the cavity has a peripheral zone of greater depth and the first layer is placed in this zone.
Claim 15
Dependent Claim
23 words
A tool component substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings. -
Claim 16
Dependent Claim
23 words
A tool component substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings. -
Claim 17
Dependent Claim
21 words
A tool substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings.
Claim 18
Dependent Claim
21 words
A tool substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings.
Claim 19
Independent Claim
26 words
A method of making a tool component substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings.
Claim 20
Independent Claim
26 words
A method of making a tool component substantially as herein described with reference to Figures 1 and 2 or 3 and 4 of the accompanying drawings.
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