DefinePK

Abstract

Studies were carried out on the force profiles of the pneumatic electrode actuation system and servo electrode actuation system to analyse their effects on weld strength. The studies were carried out at three different locations of the weld lobe; below the lower limit, between the lower limit and upper limit and above the upper limit. Servo electrode actuation system was able to produce weld with better strength compared to the pneumatic electrode actuation system within the weld lobe, due to its ability to produce high resistance for the same welding current. Below the lower limit, servo electrode actuation system was able to produce a sound weld with the use of a low welding current combined with a preferred failure mode. Similarly above the upper limit, servo electrode actuation system was able to produce a weld with high current and without the occurrence of expulsion. Finally, it was observed that with the servo electrode actuation system, the width of the pneumatic electrode actuation system’s weld lobe can be improved to an extent.