| 摘要 |
FIELD: process engineering.SUBSTANCE: method is intended for igniting arc in manual arc welding with combined soft and hot starting. Soft start is performed at short-circuiting the electrode to part. Hit start is performed in parting the electrode from the part and setting arc discharge. Soft start current is set subject to electrode diameter or preset welding current. Changing to hot start is performed in response to signal of voltage transducer that detects arc ignition at the end of soft start. Hot start current is set subject to electrode coating type and set welding current. Microprocessor-controlled power supplies are used including thyristor rectifier, inverter-based source or transistor station controller incorporated with multi-station rectifier system. Note here that in soft start auxiliary low-power HV infeed source.EFFECT: higher reliability.3 cl, 3 dwg, 3 ex |
