Patent US4134154A successfully refreshed from Google Patents.
US5033334A
Expired / Lapsed
US
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Wire drawing die
Assignee: Individual
•
Filing: 1990-05-10
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Granted: 1991-07-23
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Expires: 2010-05-10
Abstract
Abstract A wire drawing die blank is produced by providing an abrasive compact core, having top and bottom surfaces and a side surface, depositing a thin layer of high melting metal such as nickel, iron, chromium or cobalt on the side surface, the coating substantially following the contour of the side surface, providing a support having a hole extending therethrough, the hole having a cross-section larger than that of the core and allowing for the core to be located therein, locating the core in the hole leaving a space between the metal coating and the support, introducing a suitable braze, preferably in liquid form, in the space and causing the braze to bond the core to the support.
Inventors
- 👤 Cornelius Phaal
- 👤 Moosa M. Adia
- 👤 Patrick A. Seeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:56
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; B21; B21C; B21C3/00; B21C3/02; B21C3/18; B23K1/00; B23K1/14; B23K1/18; Y; Y10; Y10S; Y10S76/00; Y10S76/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
114 words
A method of producing a wire drawing die blank including the steps of providing an abrasive compact core, having top and bottom surfaces and a side surface, depositing a thin coating of a high melting metal or alloy on the side surface, the coating substantially following the contour of the side surface, providing a support having a hole extending therethrough, the hole having a cross section larger than that of the core and allowing for the core to be located therein, locating the core in the hole leaving a space between the metal coating and the support, introducing a braze in the space, and causing the braze to bond the core to the support.
Claim 2
Independent Claim
114 words
A method of producing a wire drawing die blank including the steps of providing an abrasive compact core, having top and bottom surfaces and a side surface, depositing a thin coating of a high melting metal or alloy on the side surface, the coating substantially following the contour of the side surface, providing a support having a hole extending therethrough, the hole having a cross section larger than that of the core and allowing for the core to be located therein, locating the core in the hole leaving a space between the metal coating and the support, introducing a braze in the space, and causing the braze to bond the core to the support.
Claim 3
Dependent Claim
29 words
A method according to claim 1 wherein the core is heat treated at a temperature close to the liquidus temperature of the braze prior to location in the hole.
Claim 4
Dependent Claim
28 words
A method according to claim 2 wherein the heat treatment of the core takes place at a temperature within 50° C. of the liquidus temperature of the braze.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein the coating of high melting metal or alloy has a thickness of less than 0,05 mm.
Claim 6
Dependent Claim
23 words
A method according to claim 4 wherein the coating comprises two or more layers, each layer being of a different high melting metal.
Claim 7
Dependent Claim
17 words
A method according to claim 1 wherein the metal is selected from nickel, iron, chromium and cobalt.
Claim 8
Dependent Claim
24 words
A method according to claim 1 wherein the space between the metal coating and the support has a width not exceeding about 100 microns.
Claim 9
Dependent Claim
17 words
A method according to claim 1 wherein the braze is introduced into the space in liquid form.
Claim 10
Dependent Claim
28 words
A method according to claim 1 wherein a supply of molten braze is provided and the molten braze is allowed to pass into the space by capillary action.
Claim 11
Dependent Claim
24 words
A method according to claim 1 wherein the braze is a braze having a liquidus temperature in the range 650° C. to 750° C.
Claim 12
Dependent Claim
14 words
A method according to claim 10 wherein the braze is a silver/copper based braze.
Claim 13
Dependent Claim
21 words
A method according to claim 10 wherein the braze contains a metal which is a melting point suppressant and flow improver.
Claim 14
Dependent Claim
24 words
A method according to claim 12 wherein the melting point suppressant and flow improver metal is selected from manganese, cadmium, tin, indium and silicon.
Claim 15
Dependent Claim
30 words
A method according to claim 10 wherein the braze has the following composition: ______________________________________
Metal % by weight
______________________________________
Silver 49
Copper 16
Zinc 23
Manganese 7,5
Nickel 4,5
______________________________________
Claim 16
Dependent Claim
30 words
A method according to claim 10 wherein the braze has the following composition: ______________________________________
Metal % by weight
______________________________________
Silver 50
Copper 15,5
Zinc 15,5
Cadmium 16
Nickel 3.
______________________________________
Claim 17
Dependent Claim
15 words
A method according to claim 1 wherein the abrasive compact core has a cylindrical shape.
Claim 18
Dependent Claim
14 words
A method according to claim 1 in which the core is a diamond compact.
Claim 19
Dependent Claim
16 words
A method according to claim 1, wherein the coating has a liquidus temperature exceeding 1200° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |