| 摘要 |
PURPOSE:To improve the efficiency of welding work without requiring skilled operators in a titled controller by providing an integrating circuit for the voltage between tips, a reference device, etc. and making the welding time long stepwise at every fall of said integrated value down to stepwise reference values or below. CONSTITUTION:This device is provided with an integrating circuit 6 which determines the integrated value of the voltage electrode tips 3 and 4 in the prescribed electrictity conduction cycles between said tips after the start of welding or the voltage between the tips up to the prescribed electricity conduction cycle, a reference device 8 which generates stepwise reference voltages, a comparator 7 which compares said integrated value and the reference voltage of the device 8, a timer time regulating circuit 9 which controls the welding time stepwise, etc. The device is so constituted that a switch SM is controlled with the circuit 9 in accordance with the output of the comparator 7 so a to make the welding time long stepwise at every fall of said integrated value down to the stepwise reference voltage or below. In this way, the good weld quality is obtained without requiring skilled operations. |
