Method and device for manufacturing a large-sized tubular workpiece and thin-walled hoop (shell, sleeve) obtained

摘要

Starting from an ingot, a hoop blank (10) is produced by hot forging. The tubular workpiece, such as a hoop, is sized by diametral expansion of the blank (10) without crushing its wall. The workpiece then undergoes a heat treatment and a final machining. <IMAGE>