Arc spot welding control device

TLDR: In this paper, the welding current cutoff time is compared with the preset reference time by a reference time setter and placing a command to a spot sequence circuit once again for the cutoff of welding current continuing more than a fixed time.

Abstract: PURPOSE:To prevent the defect in welding by comparing the welding current cutoff time by a welding current cutoff detector with the preset reference time by a reference time setter and placing a command to a spot sequence circuit once again for the cutoff of the welding current continuing more than a fixed time. CONSTITUTION:In case of a welding current being cut while under welding a welding current cutoff detector 3 inputs its detection output to a time counter 9. The set output of a reference time setter 8 is simultaneously inputted to this counter 9 as well and this set time and welding current cut time are compared. In case the welding current cutoff time exceeds the above set time the counter 9 transmits an output, inputting to a repeat command circuit 10. As a result, the circuit 10 gives a command to a spot sequence circuit 1 so as to repeat the arc spot welding once again after a fixed time after completing the arc spot welding once. A welding power source 2 is then transmits its output again to automatically perform the arc spot welding onto the same place.