REMOVING METHOD FOR DEFECT CAUSE IN STUD WELDING

摘要

PROBLEM TO BE SOLVED: To eliminate causes for disturbing smooth actuation at an early stage, and improve welding work efficiency by detecting a moving volume of a welding gun before the start of welding after presetting the distance for pulling and pushing a stud, and by stopping the welding start action when the movement volume exceeds a setting tolerance. ;SOLUTION: A stud S is pulled up and pushed before the start of welding, and the movement volume of a welding gun GN is detected by a movement volume detecting circuit MC so as to output it to a welding control device 3. The detected value is compared with the setting value by a CPU of the welding control device 3. When the detected value exceeds the preset movement tolerance, a welding gun smooth movement irregularity is displayed at a display circuit 12 or alarmed to stop the welding start action, resulting in eliminating the irregularity cause. Further, in the case of welding a material W to be welded after checking the smoothness of actuation, at the time when the main arc period integrating heat volume being calculated based on the main arc voltage detecting gap average value reaches the set standard heat volume, the pushing of the stud S is started so as to compensate the shortage of heat caused by the short circuit.;COPYRIGHT: (C)1999,JPO