ROTATING ARC WELDING METHOD

摘要

PURPOSE:To obtain a satisfactory welding result in accordance with an optional groove by applying oscillation simultaneously with rotation to an electrode and profiling correctly the oscillation center thereof on the center of the groove width at every half period of the oscillation. CONSTITUTION:An electrode 2 makes rotational movement around the center (a) of an electrode nozzle while generating an arc and moves in the advance direction of welding while making oscillating motion of a prescribed width in the transverse direction of the groove. The waveform of the arc current or voltage is detected in order to profile the oscillation center C of the electrode 2 on the center (b) of the groove width during welding. The detected waveform is inputted to a changeover switch by which the continuous output waveform is split to the half period on the left side of the rotation of the electrode 2 and the half period on the right side thereof. The split waveform on the left side is inputted to a left side integrator and the right side split waveform is inputted to a right side integrator. The waveforms are integrated by both integrators for every half period of the oscillation of the electrode 2 and the integrated values of both are compared. If there is a difference between both values, the driving motor of the X-axis slider is operated in the direction where the differential value is made zero. The electrode 2 is thus moved to profile the center (b) of the groove width while the oscillation center C thereof is corrected at every half period of oscillation.