| 摘要 |
PURPOSE:To cause no loss of a material and also to raise remarkably the forming accuracy, by loading successively a metallic wire rod shorn to prescribed size in plural die holes, and pressing it to formed parts which is formed as one body with a whirl-stop projection on the circumferential side. CONSTITUTION:A metallic wire rod 1 is shorn by cutting edges 2, 2, an obtained parts forming member 1a of prescribed size is led and loaded into a shaping die 3a, the primary die formation is executed by a forming punch (a), also a punch 5a is projected, and intermediate formed parts 1b are obtained. Subsequently, these parts 1b are led and loaded into a shaping die 3b, and the secondary die formation is executed by a punch 4b. The final formed goods 1m are obtained by passing through successively suitable plural processes such as loading, die formation and projecting operation in comformity with object formed parts. During this time, in case of die formation to the members 1a-m, a projection 1x for turn whirl-stop is extruded to the side successively, and pressed like a projecting lever in the end. This formed goods are used for machine parts, especially, various pin members. |
