Method of pulse welding and contact tip therefor
AssigneeLincoln Global, Inc.
InventorsWilliam Matthews, Bryan Nelson
Life of this patent
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Abstract
A contact tip for a welding gun having a central passage for a welding wire moving in a given direction toward a workpiece and receiving a welding signal by contact of the wire with the tip. The passage has an innermost end, an outermost exit end and a length of at least 1.5 inches and an opening in the contact tip intersects the passage so a pressure block slidably mounted in the opening is biased toward the wire by a spring around the contact tip urging the block against the wire. This tip is dimensioned and constructed to perform pulse welding by a relatively ductile aluminum wire.
Claims20
a method of pulse welding with a welding wire comprising:
- (a) moving said welding wire toward a workpiece and through the central passage of a contact tip, said contact tip having an innermost end, an outermost wire exit end, and a length of over 1.5 inches;
- (b) positively urging said wire against said contact tip at a fixed position closer to said innermost end than to said exit end;
- and,
- (c) passing a pulse weld signal between said contact tip and thus said welding wire and said workpiece to melt said wire by said signal and deposit said melted wire onto said workpiece.
A method of pulse welding with a welding wire comprising:
- (a) moving said welding wire toward a workpiece and through the central passage of a contact tip, said contact tip having an innermost end, and an outermost wire exit end;
- (b) positively urging said wire to a fixed position within said contact tip;
- and,
- (c) passing a pulse weld signal between said fixed position within contact tip, said welding wire and said workpiece to melt said welding wire by said signal and deposit said melted welding wire onto said workpiece.
Dependencies are inferred from the claim text.