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AssigneeUsamp
InventorsPaul Edward Krajewski, Richard Harry Hammar, Jugraj Singh, Dennis Cedar, Peter A. Friedman, Yingbing Luo
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An elevated temperature forming system in which a sheet metal workpiece is provided in a first stage position of a multi-stage pre-heater, is heated to a first stage temperature lower than a desired pre-heat temperature, is moved to a final stage position where it is heated to a desired final stage temperature, is transferred to a forming press, and is formed by the forming press. The preheater includes upper and lower platens that transfer heat into workpieces disposed between the platens. A shim spaces the upper platen from the lower platen by a distance greater than a thickness of the workpieces to be heated by the platens and less than a distance at which the upper platen would require an undesirably high input of energy to effectively heat the workpiece without being pressed into contact with the workpiece.
A preheater apparatus for preparing sheet metal workpieces for forming, the apparatus comprising:
A method for fabricating deep drawn panels from sheet metal workpieces having insufficient formability at lower temperatures, the method including the steps of:
Dependencies are inferred from the claim text.