| 摘要 |
PURPOSE:To make it possible to machine a workpiece in a short time by providing a control means for calculating the averaged current value of pulses from a charge voltage to a capacitor and a residual voltage after discharge of the capacitor and controlling the pulses in accordance with the average current value, in a resistance welding machining device. CONSTITUTION:A resistance welding machine 1 is composed of an electrode fixing device 4 for fixing an electrode 3, a drive converting section 6 for converting the rotational motion of an electrode drive section 6 into reciprocating motion, an power source device 7 for producing pulse current, a control device 11 including a motor drive control section 8, a machining condition control section 9, a machining liquid control section 10 and the like, an input device 12 receiving various data relating to a workpiece 2, a machining liquid filtering device 13 for filtering the machining liquid, and the like. With this arrangement, the control section 11 calculates a charge value by which a capacitor actually discharges from a charge voltage to the capacitor and a residual voltage after discharge of the capacitor, and the averaged current value of pulses which has been fed. As a result of comparison of the averaged value with a predetermined averaged current value, the charged voltage of the capacitor is compensated.
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