Cryogenic electrode replacement

Details Cryogenic electrode replacement Cryogenic electrode replacement

1990-01-08

1990-11-13

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Disassembling

294265, 294266, B23P 1902

Patent

active

049692470

ABSTRACT:
The present invention is an improved method for replacing worn electrode welding tips on welding robots. The method provides a way in which to apply the sub-freezing temperatures of liquid nitrogen to the welding tip while heating a shank on the robot which holds the tip. This results in a temperature gradient between the contacting surfaces of the tip and the shank which will result in an expansion of the shank and a shrinkage of the tip so that the tip can be easily separated from the shank. The process may be fully automated.

REFERENCES:
patent: 3961853 (1976-06-01), Grimpe
patent: 4274576 (1981-06-01), Shariff
patent: 4408382 (1983-10-01), Campbell
patent: 4409731 (1983-10-01), Campbell

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