Spot welding system and spot welding method and nugget diameter

Details Spot welding system and spot welding method and nugget diameter Spot welding system and spot welding method and nugget diameter

1998-08-26

2000-03-28

Mills, Gregory

Electric heating

Metal heating

For bonding with pressure

219 911, B23K 1111, B23K 1125

Patent

active

06043449&

ABSTRACT:
A welding spot is held between electrodes either biased with a controlled pressure, having a controlled voltage applied thereacross, and variations of an inter-electrode distance are detected for a welding quality control, in which the distance variations are time-integrated, a nugget size is estimated on a basis of the integration, and a decision is made of a conformity of welding quality based on an estimated nugget size.

REFERENCES:
patent: 3400242 (1968-09-01), Waller
patent: 4541277 (1985-09-01), Cecil
patent: 5194709 (1993-03-01), Ichikawa et al.
patent: 5343011 (1994-08-01), Fujii et al.
patent: 5575934 (1996-11-01), Takakuwa et al.

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