Method of making a male resistance welding electrode

Details Method of making a male resistance welding electrode Method of making a male resistance welding electrode

1982-02-22

1984-01-03

Husar, Francis S.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72264, 72267, 72354, 29825, B21D 2200

Patent

active

044236174

ABSTRACT:
A method of making a male resistance welding electrode includes a forward extrusion step in which the shank portion of the electrode is partially formed by extruding a cut-off billet of dispersion strengthened copper over a pin in a first die. Subsequently, the preform billet produced in the first die is inserted into a second die which defines a tapered shank cavity region around a central pin and a larger cavity region from which the head portion of the electrode is ultimately formed. The shank portion of the electrode is formed and the head portion worked substantially by the application of pressure to the preform billet by a first forming member. Final forming occurs when a second forming member applies pressure to the head of the electrode while the electrode remains in the second die. If desired, a small nose portion may be formed on the tip of the electrode by the second forming member and subsequently removed in a machining or cutting operation, eliminating surface irregularities in the electrode head portion surface.

REFERENCES:
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patent: 4045644 (1977-08-01), Shafer et al.
patent: 4071947 (1978-02-01), Nippert
patent: 4288024 (1981-09-01), Nippert

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