US5020394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycrystal diamond fluted tool and a process for the production of the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-10-12
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Granted: 1991-06-04
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Expires: 2009-10-12
Abstract
Abstract A polycrystal diamond fluted tool is provided which is capable of effecting working with much higher accuracy and longer life as compared with the sintered diamond straight fluted tool of the prior art, and is particularly suitable for finishing working with high accuracy. The tool is produced by forming, by a vapor phase synthesis method, a polycrystal diamond film on the surface of a substrate which has been subjected to helical grinding, then subjecting the product to a chemical treatment to dissolve and remove only the substrate, brazing the resulting polycrystal diamond film in a fluted form to at least a part of the rake face of a tool base metal which has been subjected to helical grinding in a similar manner to the substrate, and then subjecting the brazed tool base metal to working of a flank face to form a cutting edge.
Inventors
- 👤 Tsutomu Nakamura
- 👤 Tetsuo Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
B; B21; B21K; B21K5/00; B23; B23C; B23C5/00; B23B; B23B51/00; B23C5/02; B23C5/10; B23C5/1081; B23D; B23D77/00; B23D77/02; B23P; B23P15/00; B23P15/28; B23P15/32; B23B2226/00; B23B2226/31; B23B2226/315; B23B2240/00; B23B2240/08; B23B2251/00; B23B2251/50; B23C2226/00; B23C2226/31; B23C2226/315; B23C2240/00; B23C2240/08; B23D2277/00; B23D2277/24; B23D2277/2442; B23D2277/245; B23D2277/54; Y; Y10; Y10S; Y10S76/00; Y10S76/11; Y10S76/12; Y10T; Y10T407/00; Y10T407/26; Y10T407/27; Y10T408/00; Y10T408/78
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
44 words
A polycrystal diamond fluted tool, in which at least a part of the rake face of a fluted tool base metal of a cemented carbide alloy is brazed with a polycrystal diamond film synthesized by a vapor phase method to form a cutting edge.
Claim 2
Dependent Claim
44 words
A polycrystal diamond fluted tool, in which at least a part of the rake face of a fluted tool base metal of a cemented carbide alloy is brazed with a polycrystal diamond film synthesized by a vapor phase method to form a cutting edge.
Claim 3
Dependent Claim
25 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the brazing is carried out directly or through a Ti layer and Ni layer.
Claim 4
Dependent Claim
23 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the polycrystal diamond film has a thickness of 50 to 300 μm.
Claim 5
Dependent Claim
24 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the fluted tool base metal has a helical angle of 5° to 50°.
Claim 6
Dependent Claim
26 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the grown surface of the polycrystal diamond film is brazed to the cemented carbide alloy.
Claim 7
Dependent Claim
24 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the brazing is carried out using a silver braze containing Ti or Ta.
Claim 8
Dependent Claim
36 words
The polycrystal diamond fluted tool as claimed in claim 1, wherein the cemented carbide alloy contains 90 to 95% by weight of fine grain tungsten carbide powder with a grain diameter of at most 1 μm.
Claim 9
Dependent Claim
109 words
A process for the production of a polycrystal diamond fluted tool, which comprises forming, by a vapor phase synthesis method, a polycrystal diamond film on the surface of a substrate which has been subjected to helical grinding, then subjecting the product to a chemical treatment to dissolve and remove only the substrate, brazing the resulting polycrystal diamond film in a fluted form to at least a part of the rake face of a tool base metal which has been subjected to helical grinding in a similar manner to the substrate, and then subjecting the brazed tool base metal to working of a flank face to form a cutting edge.
Claim 10
Dependent Claim
109 words
A process for the production of a polycrystal diamond fluted tool, which comprises forming, by a vapor phase synthesis method, a polycrystal diamond film on the surface of a substrate which has been subjected to helical grinding, then subjecting the product to a chemical treatment to dissolve and remove only the substrate, brazing the resulting polycrystal diamond film in a fluted form to at least a part of the rake face of a tool base metal which has been subjected to helical grinding in a similar manner to the substrate, and then subjecting the brazed tool base metal to working of a flank face to form a cutting edge.
Claim 11
Dependent Claim
31 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the brazing is carried out directly or through a Ti layer and Ni layer.
Claim 12
Dependent Claim
29 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the polycrystal diamond film has a thickness of 50 to 300 μm.
Claim 13
Dependent Claim
34 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the tool base metal is in a fluted form with a helical angle of 5° to 50°.
Claim 14
Dependent Claim
27 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the tool base metal is of a cemented carbide alloy.
Claim 15
Dependent Claim
43 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 12, wherein the cemented carbide alloy contains 90 to 95% by weight of fine grain tungsten carbide alloy powder with a grain diameter of at most 1 μm.
Claim 16
Dependent Claim
30 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the brazing is carried out using a silver braze containing Ti or Ta.
Claim 17
Dependent Claim
36 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the vapor phase synthesis method is carried out by the use of thermoelectron radiation, plasma discharge or combustion flame.
Claim 18
Dependent Claim
45 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the vapor phase synthesis method is carried out by the use of a raw material gas selected from mixed gases containing, as predominant components, hydrogen and organocarbon compounds.
Claim 19
Dependent Claim
35 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the substrate consists of at least one member selected from the group consisting of Si, Mo and W.
Claim 20
Dependent Claim
27 words
The process for the production of a polycrystal diamond fluted tool, as claimed in claim 8, wherein the chemical treatment is carried out with a strong acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |