Piercing device of hydroforming mold

Details Piercing device of hydroforming mold Piercing device of hydroforming mold

2008-01-02

2009-06-30

Jones, David B (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

With cutting

C072S056000, C072S370270, C029S421100, C083S053000

Reexamination Certificate

active

07552609

ABSTRACT:
Disclosed is a piercing device of a hydroforming mold with a lower steel having a cavity therein, which can make the replacement of the pierce punch easier. The piercing device comprises: a pierce punch, the front edge portion of which is inserted into the cavity, for punching a hole through a molding material; a pierce cylinder for providing hydraulic pressure; a rod connected to the pierce cylinder, which is to be operated by the hydraulic pressure; and a pierce block connecting the rod and the pierce punch, wherein the length between the front edge portion of the rod and the pierce punch is greater than the length of the pierce punch.

REFERENCES:
patent: 6442820 (2002-09-01), Mason
patent: 6915672 (2005-07-01), Ghiran et al.
patent: 7003995 (2006-02-01), Ghiran et al.
patent: 7159426 (2007-01-01), Ghiran
patent: 7249480 (2007-07-01), Ghiran et al.

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