Production apparatus and production method for crankshaft
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United States of America Patent
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Feb 12, 2013
Grant Date -
Sep 30, 2010
app pub date -
Mar 25, 2010
filing date -
Mar 27, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a production apparatus for crankshaft, including: a die which has a lower die, an upper die, and plural side forming punches, the upper die being provided movably to the lower die, the side forming punches moving perpendicularly to a movement direction of the upper die; a press ram which moves the upper die to the lower die, closes a material of the crankshaft, and forms the material; cam mechanisms which are provided for the side forming punches and which move the side forming punches to an inside portion of the die in accordance with movement of the press ram; a grade separation structure which is provided to at least one of the side forming punches in order to prevent interference of the side forming punches with each other.
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