| 摘要 |
A piercing press structure is provided to enable instantaneous countermeasure using a minimum space when a mold for mass production is changed. A piercing press structure comprises a first gas spring(22) for transferring pressure to a second gas spring(28) using force of a piercing press. An accumulator(24) stores a part of force of the first gas spring to transfer the remaining force upon return. A pressure hose(26) transfers the pressure of the first gas spring. The second gas spring pushes a roller support member(30) by using the pressure of the first gas spring. The roller support member rotates a base steel assembly(32). The base steel assembly performs lower mold steel work of an undercut part using the roller support member. A pierce assembly(34) pierces a panel using pressure of the second gas spring.
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