Conduction preheating for hot-formed sheet metal panels

Details Conduction preheating for hot-formed sheet metal panels Conduction preheating for hot-formed sheet metal panels

2007-01-23

2007-01-23

Larson, Lowell A. (Department: 3725)

Metal deforming

Process

With temperature maintenance or modification

C148S564000

Reexamination Certificate

active

11189112

ABSTRACT:
Work hardened sheets of formable metal are annealed by thermal conduction and heated to a forming temperature. In a preferred embodiment, the sheet is placed on a flat surface of a heated lower platen to partially heat and soften the sheet and an opposing heated upper platen is brought close enough to the sheet to contribute heat but not to constrain the sheet as it expands. The platens are then both brought close to the sheet to heat it to its forming temperature largely by thermal conduction.

REFERENCES:
patent: 6253588 (2001-07-01), Rashid et al.
patent: 6880377 (2005-04-01), Kim et al.
patent: 6886383 (2005-05-01), Kim et al.
patent: 6890394 (2005-05-01), Carsley et al.

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