Title:
TREATMENT OF SPOT WELDED JOINTS FOR FATIGUE LIFE IMPROVEMENT
Document Type and Number:
WIPO Patent Application WO2005074600
Kind Code:
A3
Abstract:
A method for cold working spot welded structures to improve fatigue life, and structures made by the method. Partially finished structures are provided assembled and joined by a spot weld nugget (50). Opposing indenters (46,48), or an indenter and a backing anvil, are used to squeeze the spot weld nugget to form one or two cold working dimples, respectively. Residual compressive stress is imparted in the workpiece,resulting in increased fatigue life.
More Like This:
| JP3506751 | SPOT WELDING EQUIPMENT |
Inventors:
EASTERBROOK ERIC T
Application Number:
PCT/US2005/003190
Publication Date:
November 09, 2006
Filing Date:
February 02, 2005
Export Citation:
Assignee:
STRESSWAVE INC (US)
EASTERBROOK ERIC T
EASTERBROOK ERIC T
International Classes:
B23K11/30; B23K11/11; C21D7/02
Foreign References:
| US3415977A | 1968-12-10 | |||
| US2415573A | 1947-02-11 | |||
| US2554328A | 1951-05-22 |
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