Automotive engine valve inertia welding (heat-resistant head to economy stem)

Engine valves of all sizes are joined by inertia welding. For the valve head, a heat-resistant alloy is needed, while the valve stem can be made from a less expensive material. Inertia welding solves this problem fast and reliably. Most valve manufacturers use fully automated machines in an inline machine operation. Production rates will vary from 500 to 1200 pieces per hour, depending upon diameter and if single or dual spindle machines are used. This Model Dual 60 produces 1,200 pieces per hour, having a stem diameter of 0.312 inches.