A METHOD FOR ARC IGNITION IN WELDING

摘要

PURPOSE: An arc-ignition method in welding is provided to reduce spatters and to generate the beads of a welding part by generating arc in a state where a wire and a welding member are separated. CONSTITUTION: An arc-ignition method in welding comprises: a step for applying a low voltage(S1); a step for feeding a wire from a feeder(S2); a step for measuring the voltage between a tip and a welding member to identify whether the wire and the welding member are contacted(S3); a step for reducing the feeding of the wire by stopping the feeder when the voltage is 0(S4); a step for applying an open-circuit voltage in a welding machine(S5); and a step for lifting up the wire from the welding member with a solenoid valve so that arc can be generated for ignition(S6). [Reference numerals] (AA) Inputting to start welding; (BB) Voltage≒OV; (CC) No; (DD) Yes; (EE) Operating a solenoid valve; (FF) Arc generated; (GG) Finishing soft arc ignition; (S1) Applying a low voltage; (S2) Feeding a wire; (S3) Measuring the voltage between a tip and a welding member; (S4) Stopping the wire feeding; (S5) Applying an open-circuit voltage;