Lawrence H Lang

US Patent:

57135070, Feb 3, 1998

Filed:

Mar 21, 1996

Appl. No.:

8/619364

Inventors:

Elmo S. Holt - Bellflower CA
Lawrence J. Lang - Rowland Heights CA

Assignee:

Rockwell International Corporation - Seal Beach CA

International Classification:

B23K 2012

US Classification:

2281121

Abstract:

A variable pin length stir friction welding method wherein the stir friction welding pin penetrates the workpiece as the workpiece translates. The stir friction welding pin starting at a zero penetration and extending to the depth needed to repair a weld or to make a weld. Then withdrawing the pin to zero penetration as the work is translated. The weld path is thus ramped into and out of the workpiece leaving no holes which need to be repaired. Circumferential welds can be made by keeping the pin extended to the welding depth for at least one complete revolution of the weld.