LONG VALVE BODY PUNCHING, ELONGATING, AND FORGING PROCESS

A long valve body punching, elongating, and forging process comprising the following steps: heating a blank to 1220°C, thermally insulating for 9 hours, using an upper flatbed and a lower turntable for primary upsetting, primary elongating, and secondary upsetting of the blank to 1320 mm × 1040 mm and 1200 mm in height, and returning to a furnace; using a die punch for punching, flipping, using the die punch for punching through and cutting off a core material, and returning to the furnace; using secondary punching for elongating to 1450 mm in length, withdrawing the punching die after shaping, and returning to the furnace; using a shaping core rod for elongating to position, and finishing a square body for forming. The forging process increases the tightness of the core portion of a product, extends the service life of the product, and reduces processing costs and processing cycles. L'invention concerne un procédé de poinçonnage, d'allongement et de forgeage d'un long corps de soupape comprenant les étapes s