Circuit for measuring the voltage drop between the welding...

Details Circuit for measuring the voltage drop between the welding... Circuit for measuring the voltage drop between the welding...

G - Physics

01

R

324/59

G01R 19/10 (2006.01) B23K 11/06 (2006.01) B23K 11/25 (2006.01) B23K 11/30 (2006.01)

Patent

CA 1311014

ABSTRACT OF THE DISCLOSURE: A circuit for measuring the effective voltage drop at the welding position between the welding electrodes of a resistance seam welding machine. A first measuring loop for measuring a first loop voltage is secured to the lower welding arm close to the lower welding electrode and is in communication with the upper welding electrode through a sliding contact. The second measuring loop is taken close to the welding electrodes through the head portion of the Z- rail. The conductor turns of both measuring loops, which lead to an evaluation circuit are twisted together. Thus the stray effects picked up in the two measuring loops are the same. The difference between the two loop voltages formed in the evaluation circuit is the effective voltage drop which is further processed in the usual manner to monitor the quality of the welding seam produced.

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