Patent attributes
The present invention relates to an arc welding method in which generation of spatters can be suppressed while the use quantity of gas to be supplied to a welding portion can be decreased. A welding wire 8 is brought into contact with a work W while applying a voltage between the welding wire 8 and the work W, so that the end of the welding wire 8 is caused to be fixingly welded to the work W. At this time, an electric resistance between the welding wire 8 and the work W is continuously obtained during the contact between the welding wire 8 and the work W, and thus, a minimum of the electric resistance is detected. When the current is temporarily reduced after the detection of the minimum of the electric resistance, the tip of the welding wire 8 hardly bursts, thus suppressing the expelling of molten particles, which may cause spatters, from the welding wire 8. The minimum value is also used for the torch-to-workpiece distance control.
