Metal working – Method of mechanical manufacture – Combined manufacture including applying or shaping of fluent...
Reexamination Certificate
2007-06-26
2007-06-26
Cozart, Jermie E. (Department: 3726)
Metal working
Method of mechanical manufacture
Combined manufacture including applying or shaping of fluent...
C072S352000, C072S358000, C072S372000
Reexamination Certificate
active
10899486
ABSTRACT:
A method for forging/molding a coarse blank of an aluminum transmission shaft, including steps of: placing burn-in softened aluminum material into a preheated mold; using a first punch head to first forge the aluminum material in the mold cavity from outer side of the molding hole so as to form a blank body of the transmission shaft with two pivot heads wherein one pivot head is located at each end of the transmission shaft and a shorter middle shaft rod; moving out the first punch head and connecting an extension mold with the mold; and immediately using a second punch head to secondarily forge the blank body in the mold cavity from outer side of the extension hole so as to make an end section of the second punch head extend into the mold cavity to a position near the inner end of the mold cavity, whereby the middle shaft rod of the blank body outward axially extends to the extension mold into a predetermined length to form the transmission shaft.
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patent: 7055359 (2006-06-01), Liu
patent: 2005/0086784 (2005-04-01), Li et al.
patent: 2006/0016237 (2006-01-01), Liu
Cozart Jermie E.
Jinn Ruey Industries Co., Ltd.
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