ELECTRODE INSPECTOR OF SPOT WELD MACHINE AND ELECTRODE INSPECTION METHOD OF SPOT WELD MACHINE

摘要

PROBLEM TO BE SOLVED: To obtain a sufficient weld quality by judging whether or not an electrode dressing treatment is necessary precisely and easily in a short time even in progress of an assembly work with no need of a particularly expensive and complicated apparatus and no need of complicated calculation, and by carrying out a suitable dressing treatment in accordance with electrode conditions while an optimal timing when the dressing treatment should be executed is detected to minimize the electrode dressing treatment.;SOLUTION: A color image of a contact end face 11 of an electrode 10 acquired by photographing with a color camera is HSV-converted, the image is scanned pixel by pixel, and the HSV value of each pixel is judged whether or not to be a galvanization value. When a plated surface area percentage Rzn does not exceed an upper limit threshold Rc from the calculation of the plated surface area percentage Rzn by which galvanization plating is deposited on the contact end face 11, a spot weld is allowed to be continued with the electrode 10. On the other hand, when the plated surface area percentage Rzn exceeds the upper limit threshold Rc, a polishing time Ts is calculated on the basis of the maximum V value of each pixel, thereby carrying out an electrode dressing treatment.;COPYRIGHT: (C)2015,JPO&INPIT