PURPOSE: To simplify the control and to prevent defective imperfection by calculating the penetration quantity SP in welding and deposition quantity SD respectively with the specified equation and by performing the welding by changing independently the welding mean current Iav or welding voltage V only.
CONSTITUTION: The welding of frequency responding type is performed with the output of a control device 5 being inputted to a welding power source 6 by arranging a feeding speed adjusting dial 3 and tachometer generator 4 for a wire feeding device 1. In this case, a welding penetration quantity SP and deposition quantity SD are calculated from the equation (I) and equation (II) in the welding mean current and arc length in the prescribed range, and the mean current Iav only is changed independently in case of changing the penetration quantity S and the welding voltage V is independently changed in case of changing the deposition quantity S to perform the welding. In this way, the control is simplified and in complete fusion defect is prevented as well.
HONDA KEIZO
YOSHIZAWA TAKESHI
