Spot resistance welding method and welding electrode for impleme

Details Spot resistance welding method and welding electrode for impleme Spot resistance welding method and welding electrode for impleme

1991-11-25

1993-07-20

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

B23K 1125

Patent

active

052295680

ABSTRACT:
The subject of the present invention is a method of spot resistance welding at least two metal pieces (1, 2). The method consists in pressing the pieces (1, 2) between two electrodes (3, 4), in determining the overall resistance between the electrodes (3, 4), and the contact resistances of each electrode (3, 4) with the piece (1, 2) with which it is in contact, in calculating the contact resistance between the said pieces by the difference between the overall resistance and the sum of the resistances of each piece and of the piece-electrode contact resistances, in determining the actual intensity of the electric welding current, and in adjusting the various welding parameters for the said pieces (1, 2) in order to maintain a constant optimal intensity of the electric welding current.
The subject of the present invention is also a welding electrode for implementing the method.

REFERENCES:
patent: 2045523 (1936-06-01), Fassler
patent: 3089020 (1963-05-01), Hurlebaus
patent: 3436514 (1969-04-01), Broomhall et al.
patent: 3462577 (1969-08-01), Helms et al.
patent: 4472620 (1984-09-01), Nied
patent: 4792656 (1988-12-01), Namiki et al.
patent: 4876430 (1989-10-01), Herschitz et al.
British Welding Journal, vol. 14, Nov. 1967, pp. 582-591, B. P. Hayward, "Scientific Instrumentation as an Aid to the Control of Resistance Weld Quality".
PT/Werktuigbouw, vol. 43, No. 8, Aug. 1988, pp. 27-31, J. O. Zwolsman, "De Contactweerstand in Het Weerstandlassen".

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