PROCESS FOR ASSESSING WELDED JOINTS

PCT No. PCT/DE93/00675 Sec. 371 Date Jan. 31, 1995 Sec. 102(e) Date Jan. 31, 1995 PCT Filed Aug. 2, 1993 PCT Pub. No. WO94/03799 PCT Pub. Date Feb. 17, 1994A process for on-line assessment of resistance weldings uses an ultrasonic source which impinges shear waves onto the weld region and an ultraso...

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1. Verfasser:	WASCHKIES, ECKHARD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MACHINE TOOLS MEASURING METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS SOLDERING OR UNSOLDERING TESTING TRANSPORTING WELDING WORKING BY LASER BEAM
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Zusammenfassung:	PCT No. PCT/DE93/00675 Sec. 371 Date Jan. 31, 1995 Sec. 102(e) Date Jan. 31, 1995 PCT Filed Aug. 2, 1993 PCT Pub. No. WO94/03799 PCT Pub. Date Feb. 17, 1994A process for on-line assessment of resistance weldings uses an ultrasonic source which impinges shear waves onto the weld region and an ultrasound receiver. The time at which the melting point of the weld material is reached and a weld nugget begins to form is determined from the output signal of the ultrasound receiver. The volume V of the weld nugget is calculated during the welding operation from the diminishment of shear waves after having reached the melting temperature.