Trapped-washer three-piece inertia welded assembly (six-station indexing)

In another unique application, a three-piece assembly had to be joined by inertia welding, trapping a washer between a cup and threaded stud, without sacrificing weld strength or a production rate of 600 pieces per hour. The solution was a Model 90 inertia welder with a six-station indexing unit combined with hopper and vibratory loading equipment.