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US 8,756,969 B2Granted
Method of making a hardened sheet metal part
AssigneeBenteler Automobiltechnik GmbH
InventorsStefan Gosmann, Josef Köster, Oliver Lütkemeier
Life of this patent
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Abstract
In a method of making a hardened sheet metal part, a blank is cut to form a region defined by at least one cutting edge having a cutting depth which is smaller than a material thickness of the blank. The blank is subjected to a hot forming step and at least in one area is allowed to harden. After the hot forming step, the region is pushed along the cutting edge.
Claims10
A method of making a hardened sheet metal part, comprising the steps of:
- cutting a blank to form a region defined by at least one cutting edge having a cutting depth which is smaller than a material thickness of the blank, while displacing the region out of a plane of the blank in one direction such that a surface of the region protrudes over a surface of the blank;
- hot forming the blank and allowing at least one area of the blank to harden;
- and
- pushing out the region along the cutting edge after the hot forming step.
1 more element
Dependencies are inferred from the claim text.