Method of making a shaped sheet-metal part
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United States of America Patent
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Apr 7, 2009
Grant Date -
May 17, 2007
app pub date -
Oct 25, 2006
filing date -
Oct 25, 2005
priority date (Note) -
Expired
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Abstract
A shaped part is made by forming in a flat steel plate a thickness-reducing groove and hot-shaping and hardening the flat steel plate into a three-dimensional shape. Then the plate formed with the groove is cooled, and a piece is sheared off the cooled plate along a cut line in the groove.
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