Arc welding using oscillating torch - adjusting current and wire feed to avoid cold welds

摘要

In a welding process using a continuous wire electrode and a welding torch which is oscillated across the weld seam as it is moved along, the welding current is steadily increased as the torch moves from the seam centre to a seam edge and decreased as the torch moves back to the centre. Pref. the wire feed is altered synchronously with the current. The appts. includes two coupled rotary potentiometers which are connected by their shafts to the drive for oscillating the torch for carrying out current and wire feed variation. Allows high speed automatic welding to be carried out without formation of cold welds.