ARC PROFILE CONTROLLER FOR TIG WELDING

摘要

PURPOSE:To perform the welding with an optimum groove shape by comparing a level set by a groove wall detection level setter with a detected result of an arc voltage detector and detecting a groove wall to reverse the oscillation. CONSTITUTION:The oscillation is performed at the speed V1 set by a first oscillating speed setter 10 and the amplitude is etaC which is obtained by multiplying an initial oscillation amplitude value C by a set ratio eta. The oscillating speed is detected by a pulse generator 27 and amplified by an amplifier 29 and fed back to an oscillation driving circuit 14 and a motor is controlled so that the actual speed of the oscillation is made to the set speed V1. The actual motion of the oscillation is detected by a potentiometer 28 and inputted to an amplitude value storage circuit 19 and further, inputted to a computing element 16. The computing element 16 compares the quantity of movement of an electrode measured by the potentiometer 28 with the calculated etaC and when both are identical, an oscillation changeover signal is produced and a switching circuit 12 is actuated and the oscillating speed V2 is inputted to the driving circuit 14 and the oscillation is controlled so that its speed is made to the V2.