Controlling bolt welder involves moving bolt to workpiece in two stages with linear drive, removing bolt slightly, producing spark and moving bolt to dip into molten material

摘要

The method involves a linear drive moving a welding axle (3) in the feed direction until the bolt (7) is just at a small distance from the workpiece, moving it at a slower speed until the bolt contacts the workpiece (11), removing the bolt from the workpiece by a defined distance, then forming a spark between the bolt and workpiece and moving the weld axle in the feed direction to dip the bolt in the resulting molten material.