Closed structure parts, method and press forming apparatus for manufacturing the same
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United States of America Patent
Stats
-
Oct 20, 2015
Grant Date -
Jul 21, 2011
app pub date -
Sep 24, 2009
filing date -
Sep 25, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for manufacturing a closed structure part has a closed section using a blank made from a metal plate by pressing the blank using a press forming die and fixing a pair of joint ends of the blank to each other, the method including a pre-forming step of processing the blank into an interim part having a closed section corresponding to the closed structure part, a closing step of, after the pre-forming step is completed, moving the joint ends of the interim part toward each other and urging, against one of the joint ends, a concave flange processing portion formed on one of a pair of press forming surfaces of the press forming die at the edge end adjacent to the other press forming surface, and a press joining step of, after the closing step is completed, further moving the press forming die in a pressing direction, bending the one of the joint ends using a pressing force applied from the flange processing portion so that the joint end overlaps the outer surface of the other join end and a latch flange portion for latching the other joint end is formed and, simultaneously, pressing the blank using the pair of press forming surfaces and press-forming outer portions of the pair of the joint ends of the blank into predetermined shapes.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- B23K Class
- 13.67 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 20, 2027 |
