Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2011-08-16
2011-08-16
King, Roy (Department: 1733)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S650000
Reexamination Certificate
active
07998289
ABSTRACT:
To produce a metallic shaped part (1), in particular a vehicle body part, from a semifinished product (2) made of an unhardened hot-workable steel sheet, first of all the semifinished product (2) is formed by a cold-forming method, in particular a drawing method, into a part blank (10) (process step II). The part blank (10) is then trimmed at the margins to a marginal contour (12′) approximately corresponding to the part (1) to be produced (process step III). Finally, the trimmed part blank (17) is heated and press-hardened in a hot-forming tool (23) (process step IV). The part (1) produced in the process already has the desired marginal contour (24) after the hot forming, so that the final trimming of the part margin is dispensed with. In this way, the cycle times during the production of hardened parts of steel sheet can be considerably reduced.
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Brodt Martin
Fischer Uwe
Mehrholz Ralf
Daimler AG
King Roy
Patent Central LLC
Pendorf Stephan A.
Yang Jie
LandOfFree
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