device to control a rotating arc schweißkopfes

摘要

Controlling the feeding speed of the filler wire during arc welding of tube circumferences consists of fixing a plate (12) to the rotating welding head (1) which has concentrically arranged fixed probe points (a' to h'). A freely rotatable pendulum (11) with a probe device is also fitted to the welding head but due to its own weight always remains in a vertical position. As the welding head (1) rotates around the tube to be welded (4), the plate and probe points also rotate and when the pendulum, specific probe point and control circuit (13) are aligned a signal is given to the wire feed device (14,15,16). As the probe points each pass by the alignment point the control signals are changed to alter the feeding pattern. ADVANTAGE - The method does not require any adjustment when different sized tubes are worked. Only the holding roller (5) needs to be height adjusted by moving rod (6).