Resistance welding monitor

Details Resistance welding monitor Resistance welding monitor

1993-07-30

1994-08-30

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

B23K 1125

Patent

active

053430115

ABSTRACT:
A welding voltage output from a power source of a resistance welder is derived on the basis of a welding current and an interelectrode voltage, and diameter of a nugget which is formed in a sheetlike work to be welded is estimated on the basis of the welding current, the welding voltage, data of material constant and a thickness of the sheetlike work, subsequently, the estimated diameter of nugget is composed with a target diameter of nugget, and thereby quality of the resistance welding is determined.

REFERENCES:
patent: 4302653 (1981-11-01), Denning et al.
patent: 4447700 (1984-05-01), Cohen
patent: 5081338 (1992-01-01), Dufrenne
"System Monitors and Controls Nugget Expansion in Real Time", Welding Journal, vol. 69 No. 2, Feb. 1990 pp. 61-63.
Patent Abstract of Japan, vol. 10 No. 258 (M508) (2294) Aug. 1986 re JP-A-61-71189.
European Patent Abstract, vol. 8 No. 100 (M295) May 1984, re JP-A 59013584.
Hiroaki Sato, Estimation of the Diameter of a Nugget Using a Numeral Calculation Model, 1988 (Japanese language document).
Yasuto Nishiu, A Study Relating to Acceleration in Quality Monitoring Operation of Numberal calculation Aided Type for the Resistance Spot Welding, 1991 (Japanese language document).
Akira Ishihara, A Study Relating to Simulation of Forming Process of Adhered Part in Spot Welding, 1983 (Japanese language document).

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