| 摘要 |
A piercing press is provided to form a piercing hole finely by moving forward and turning a piercing punch mounted to an actuating cam to an inclined part of a panel placed between an upper pad and a lower die with a pneumatic motor. A piercing press is composed of a lower die(5) supporting a lower part of a panel(p), an upper die(1) moving up and down in an upper part of the lower die, an upper pad(3) mounted in a lower part of the upper die by a cushion spring and composed of a guide hole, an inclination block mounted at a side of the lower die, an actuating cam(7) installed by inserting a restoring unit to an upper part of the inclination block and composed of a piercing punch(19), and an operating driver(25) mounted in the lower part of the upper die to operate the actuating cam. The piercing punch is mounted to the actuating cam by a rotating unit with operation pressure, and the rotating unit is connected to an operation pressure supply unit. The operation pressure supply unit regulates supply of operation pressure to the rotating unit according to signals in detecting operation of the cam by a cam operation detecting unit.
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