METHODS OF AND SYSTEMS FOR FORCED FREEZE FLASH WELDING OF ADVANCED HIGH STRENGTH STEELS WITH AN OFFSET STAGE

摘要

In a force freeze welding method and system for joining metal work pieces, a controlled and programmable electrical potential is applied to a circuit including a first work piece (130) and a second work piece (140). The first work piece (130) is linearly translated towards the second static work piece (140) to engage along a faying interface (190). The first work piece (130) and the second work piece (140) move together at a controlled rate and voltage is applied to the circuit which produces heat to soften or plasticize the faying interface (190) during a flashing stage (310). A position offset (210) or abrupt compression force is applied to at least one of the first work piece (130) and the second work piece (140) prior to applying an upset (330) to force the first work piece (130) and the second work piece (140) together to weld the first work piece (130) and the second work piece (140) along the faying interface (190).