Flanging and hemming process with radial compression of the...

Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work

Reexamination Certificate

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C072S465100, C072S466800

Reexamination Certificate

active

06865917

ABSTRACT:
A method and tool for forming a hem flange pre-hem and a final hem on a sheet metal panel wherein elastomeric tooling elements are used to apply radial compression during a forming operation. The elastomeric tooling elements are compressed and apply pressure to a side of the sheet metal panel, for example an aluminum panel, that is stretched during a forming process step. A foil layer may be placed between the sheet metal blank and the elastomeric tooling element to reduce friction and further improve forming performance.

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