Sheet metal stamping die design for warm forming

Patent · 22 April 2003

OSTI ID:921321

Ghosh, Amit K ^[1]

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1. Ann Arbor, MI

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.

• Sponsoring Organization: United States Department of Energy
• Assignee: The Regents of the University of Michigan (Ann Arbor, MI)
• Patent Number(s): 6,550,302
• Application Number: 09/625,426
• OSTI ID: 921321
• Country of Publication: United States
• Language: English