| 摘要 |
PURPOSE:To form a head pipe for a two-wheel barrow at a low cost by moving forward and backward a pair of drawing dies and burnishing punches against the end part of a work, and executing simultaneously drawing and burnishing. CONSTITUTION:A new work W is held by a gripper 5, and fed in between drawing dies 11, 21 containing burnishing punches 13, 23. The work W is held by moving forward the drawing die 21 of the movable side, and by further moving it forward, both ends of the work W are drawn to a necessary shape. Subsequently, when the burnishing punches 13, 23 are moved backward, the inside surface of both ends of the work W is finished to a necessary size. The drawing die 21 of the movable side has a little smaller diameter than the drawing die 11 of the fixed side, therefore, when the drawing die 21 of the movable side is moved backward in the end, it moves backward in a state that the work W is held, contacts by pressing to the tip of a sleeve 4b of an ejector 4 projected relatively, and discharges the work W. |
