JPS5689385A - Electrode oscillating submerged arc welding method - Google Patents

Abstract

PURPOSE: To prevent the occurrence of weld defects such as lack of penetration, slag inclusion, and high-temp. cracking by temporarily stopping transverse movement of an electrode near the point of intersection every time when it traverses to both sides of the weld line by striding over said line.

CONSTITUTION: Welding flux 6 of sintered type or fused type is beforehand sprayed on a groove part 2. A control device 9 constituted of a jig 8 which converts the rotating motion of a motor for oscillation 7 to the direction 11 of oscillation, a circuit which so acts as to make central stopping once in 1W4 cycles of electrode oscillating cycles, a circuit which is capable of adjusting central stop time and both end stop time respectively independently and a circuit which adjusts the number of oscillation cycles is connected to a welding nozzle 5. Hence, the submerged arc 10 is oscillated toward the direction of crossing the welding progression direction and central stopping is carried out at a rate of up to once in 4 cycles such as one time of central stopping S in 1 cycle of electrode oscillation cycle.

COPYRIGHT: (C)1981,JPO&Japio