Method for producing crankshaft and production apparatus therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 14, 2014
Grant Date -
Dec 22, 2011
app pub date -
Feb 5, 2010
filing date -
Feb 9, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A preformed product of a crankshaft is formed in a shape smaller than a shape of a cavity of a separatable die set 1103 composed of an upper die and a lower die and is disposed in the cavity of the die set 1103 as a material M. The cavity of the die set 1103 matches a required shape of the crankshaft. When the material M is disposed in the cavity of the die set 1103, a clearance is formed between the material M and the cavity, and when a side-forming punch 1000P is inserted into the material M, a hollow hole is formed in the material M and the cavity is filled with the material M. As a result, not only can weight saving be achieved by forming the hole in the crankpin of the crankshaft, but also degradation of dimensional accuracy by forming the hole can be avoided.
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