Deep drawing die for making metal vessel with thin walls has stamping tool with end shaped to desired contour of finished vessel forcing metal into resilient ring inside metal ring

摘要

The shallow bowl-shaped workpiece (22) is trapped against the conical surface of a drawing ring by a moving ring by a moving ring (31) with a chamfered end (62). A stamping tool (33) moves forward inside the rings and pushes the bottom of the workpiece into a smaller diameter ring (46) containing a resilient ring (47). The sides of the bowl are reduced in diameter by being pulled through the angled gap (74) between the moving ring and the drawing ring.