Process to regulate the pressure exerted on work piece during spot welding by sensor arrest of spur pinion and/or motor

摘要

In a process to set the pressure in a spot welding assembly an electrode advances towards the work piece and pressure/advance compensation is effected. The compensation element (16) is positioned between a connecting rod (5) and a pincer arm (6). A sensor (43) detects the position of a spur pinion (4) and/or motor (13) near the upper top dead center (19), at which the compensation element is locked, triggering the application of pressure. On reaching the position near the top dead center the spur pinion and/or motor stop and maintain this position, thereby maintaining unvaried pressure on the work piece during the spot welding process.