Forming tool apparatus for hot stretch-forming processes

Details Forming tool apparatus for hot stretch-forming processes Forming tool apparatus for hot stretch-forming processes

2006-06-27

2006-06-27

Tolan, Ed (Department: 3725)

Metal deforming

With temperature modification of tool or of specified...

Of tool

C072S342100, C072S342800, C072S709000

Reexamination Certificate

active

07066000

ABSTRACT:
A tooling assembly for hot stretch-forming of a sheet metal workpiece. A forming tool is attached to a plate and includes a shell having a forming surface, and support walls that extend away from the shell, that terminate in a rearward surface of the forming tool, and that define open cells between the support walls. Heating elements are embedded within the forming tool for integral and uniform heating thereof. To limit conductive thermal losses from the forming surface, through the forming tool, and to the plate and surrounding environment, the open cells are provided in the forming tool and insulative support posts are disposed between the forming tool and the plate within deep counterbores in the rearward surface of the forming tool. To limit radiative and convective thermal losses, thermal insulation is disposed within the cells and between the forming tool and plate.

REFERENCES:
patent: 3015292 (1962-01-01), Bridwell
patent: 3461709 (1969-08-01), McMillen
patent: 3584487 (1971-06-01), Carlson
patent: 3703093 (1972-11-01), Komatsu et al.
patent: 3783669 (1974-01-01), Furney, Jr.
patent: 6810709 (2004-11-01), Hammar et al.
patent: 6886383 (2005-05-01), Kim et al.
patent: 6910358 (2005-06-01), Schroth

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