WARM-FORGING PRESS APPARATUS FOR MANUFACTURING FORGE-RING AND METHOD FOR MANUFACTURING FORGED-RING USING THIS

摘要

PROBLEM TO BE SOLVED: To realize the formation of a large-scaled work and the improvement of quality accuracy with the existing facility by expanding the forming limited range in the conventional warm- and hot-forging.;SOLUTION: The upper end face of a billet, is restricted with a cavity 101 arranged in an inner-punch 1 and also, while restricting the lower end face of the billet with the step-difference formed between a counter-punch 13 and a die 12, an up-setting and indentation continuous forging-formation [UB(Ultra Backward) formation], in which the up-setting and the indentation of the billet are performed in one stroke, is performed by working the press, and successively, while applying the full pressure, the formation is performed and an almost dish-like formed body is obtained and further, a piercing process for piercing the inner portion of the above formed body is performed.;COPYRIGHT: (C)2009,JPO&INPIT