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US 4,396,820 AGranted
Method of making a filled electrode for arc welding
OwnerManfred Puschnerinventor
Life of this patent
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Abstract
A welding electrode of the filling type for machine or hand welding is formed by providing a longitudinally extending stepped ridge along one edge of a strip which is then bent transversely so that the opposite edge lies in the step and is a projecting portion of the step, underlies the gap, the resulting tubular member receiving the filling. The junction is then welded by tungsten inert gas or electron beam welding to close the shell and seal the latter.
Claims11
A method of making a filled wire for arc welding comprising the steps of:
- (a) continuously forming a metal strip with a stepped formation along one longitudinal edge thereof;
- (b) bending the strip having said stepped formation along said one edge into a U-shaped channel;
- (c) introducing a filling into said channel;
- (d) thereafter with said strip in direct contact with said filling, directly bending the longitudinal edges of said strip into close juxtaposition whereby the other longitudinal edge of said strip lies in the stepped formation of said one edge and a projection of said formation underlies said other edge within the tubular body thus formed;
- (e) fusion welding said edges together to seal said filling within said body;
- (f) reducing the diameter of said body to the diameter of the desired welding wire;
- and
- (g) annealing said welding wire.
5 more elements
Dependencies are inferred from the claim text.