| 摘要 |
PURPOSE:To enable a contact having a flat contact surface to be formed by continuous press working without requiring secondary machining by performing a main-contact- surface forming process by way of a two-splitting shaving operation. CONSTITUTION:A plate 13 supporting the upper side of a long-sized plate workpiece W locates between an upper mold (movable mold) 11 and a lower mold (fixed mold) 12. The plate W is fed in the direction of its extension by predetermined pitches, and the molds 11 and 12 have a plurality of molds for every pitch of the feed of the plate W. When the plate W comes out of the space between the molds 11, 12, a series of operations is finished. In this case, the first process cuts the plate W including a temporary contact surface, and the temporary contact surface is shaved from its front and back sides by a two-splitting shaving operation in which the plate W is split into two along its thickness and machined, so as to form a main contact surface. The main contact surface can thus be made very smooth and both edges of the main contact surface along the thickness of the plate are shaped as desired, so that even if the contact is tilted a sufficient contact area and sufficient contact pressure can be secured. |
