PROCESS FOR WELDING ARC CONTROL BY DETERMINING THE INSTANTANEOUS CURRENT AND VOLTAGE

摘要

A process for control of a butt welding of tubes is disclosed wherein readil y measurable parameters of a process of welding are read, voltage and current, and parameters such as impedance or time interval across a portion of a puls e are derived from the voltage and current. The derived values are then used i n conjunction with parameters of the welding machine to set the values of the welding machine and the torch or torches connected to it to control the powe r of penetration of a welding arc for no piercing but with penetration.