| 摘要 |
This multi-step heading machine is provided with a base, die blocks, a plurality of dies, a ram, punch blocks, a plurality of punches, and a driving unit. The die blocks are divided into die units and arranged along the width direction of the base; each of the die blocks has a vertical reference surface and a lateral reference surface formed near the center in the vertical direction and the width direction. The base (back plate) has: a plurality of lateral reference members and vertical reference members which are abutted by the reference surfaces of the die blocks; a lateral clamp mechanism; and a vertical clamp mechanism. The punch blocks are divided into punch units and arranged along the width direction of the ram; each of the punch blocks has a lateral reference surface and a vertical reference surface. The ram has: a plurality of lateral reference members and vertical reference members which are abutted by the reference surfaces of the punch blocks; a lateral clamp mechanism; and a vertical clamp mechanism. It is thereby possible to reduce core-shifting between the dies and the punches when molding heat has been generated during heading, and obtain a high heading accuracy. |
