US4045644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding electrode and method of making
Assignee: SCM Metal Products Inc
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Filing: 1975-07-24
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Granted: 1977-08-30
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Expires: 1995-07-24
Abstract
Abstract A welding electrode made of dispersion strengthened metal wherein the electrode tip is pressure formed or forged to reorientate and/or destroy the coaxial fiber structure and form a non-axial grain structure in the electrode tip portion. The electrode is produced in a method for pressure flowing a blank by applying axial pressure to pressure flow the blank transverse to the axially applied pressure whereby the overall strength of workpieces such as welding electrode rods is substantially increased.
Inventors
- 👤 William M. Shafer
- 👤 Anil V. Nadkarni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:48
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/40; B23K35/402; B21; B21J; B21J5/00; B23K11/00; B23K11/30; B23K11/3009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A dispersion strengthened metal resistance welding electrode produced from consolidated dispersion strengthened metal extruded in an axial direction and having co-axial, anisotropic fibrous grain structure, the improvement comprising: said resistance welding electrode having a welding tip portion wherein the grain structure is reorientated into a nonfibrous, isotropic grain structure formed by pressure-flowing said tip portion transversely to said axis to form the nonfibrous isotropic grain structure in said welding tip.
Claim 2
Dependent Claim
70 words
A dispersion strengthened metal resistance welding electrode produced from consolidated dispersion strengthened metal extruded in an axial direction and having co-axial, anisotropic fibrous grain structure, the improvement comprising: said resistance welding electrode having a welding tip portion wherein the grain structure is reorientated into a nonfibrous, isotropic grain structure formed by pressure-flowing said tip portion transversely to said axis to form the nonfibrous isotropic grain structure in said welding tip.
Claim 3
Dependent Claim
91 words
In a process for forming dispersion strengthened metal welding electrodes from consolidated dispersion strengthened metal extruded in an axial direction and having a co-axial anisotropic fibrous grain structure, the improvement comprising: providing a workpiece blank from said extruded metal; applying axial pressure to said workpiece blank to pressure flow at least a portion of said workpiece blank in a direction transverse to said axis to form an electrode welding tip to destroy the co-axial grain structure in said tip and form a nonfibrous isotropic grain structure in said electrode welding tip.
Claim 4
Dependent Claim
91 words
In a process for forming dispersion strengthened metal welding electrodes from consolidated dispersion strengthened metal extruded in an axial direction and having a co-axial anisotropic fibrous grain structure, the improvement comprising: providing a workpiece blank from said extruded metal; applying axial pressure to said workpiece blank to pressure flow at least a portion of said workpiece blank in a direction transverse to said axis to form an electrode welding tip to destroy the co-axial grain structure in said tip and form a nonfibrous isotropic grain structure in said electrode welding tip.
Claim 5
Dependent Claim
41 words
The process of claim 2 wherein the electrode blank has a machined conical tip which is cold forged into a blunt truncated welding tip by pressure flowing the tip portion in a direction transverse to the axis of the electrode blank.
Claim 6
Dependent Claim
14 words
The process of claim 2 wherein the tip of the electrode blank is truncated.
Claim 7
Dependent Claim
30 words
The process of claim 2 wherein the cross-section area of the distal end of the truncated tip portion of the electrode blank is at least doubled by the transverse flow.
Claim 8
Dependent Claim
13 words
The process of claim 2 wherein the electrode blank is a cylindrical blank.
References Cited (Backward Citations)
US1998108A
Cited
US1918226A
Cited
US2066314A
Cited
US2754571A
Cited
US3250109A
Cited
US3340718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |