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Sheet metal stamping die design for warm forming

United States Patent

April 22, 2003
View the Complete Patent at the US Patent & Trademark Office
In metal stamping dies, by taking advantage of improved material flow by selectively warming the die, flat sections of the die can contribute to the flow of material throughout the workpiece. Local surface heating can be accomplished by placing a heating block in the die. Distribution of heating at the flat lower train central regions outside of the bend region allows a softer flow at a lower stress to enable material flow into the thinner, higher strain areas at the bend/s. The heating block is inserted into the die and is powered by a power supply.
Ghosh; Amit K. (Ann Arbor, MI)
The Regents of the University of Michigan (Ann Arbor, MI)
09/ 625,426
July 25, 2000
This invention was made in part with government support awarded by the Department of Energy Contract LMES 86-X-SU544C. The government has certain rights in the invention.