Method and device for forming sheet metal

Details Method and device for forming sheet metal Method and device for forming sheet metal

1995-09-19

1997-05-27

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

B21D 2210

Patent

active

056321724

ABSTRACT:
A method and apparatus for shaping a sheet metal blank into a shaped outline is disclosed. The blank is clamped hydraulically between an upper tool and a lower tool with one of the tools having the shaped outline. Hydraulic pressure acts on a side of the sheet metal blank opposite the shaped outline to force the sheet metal blank into the shaped outline. The sheet metal blank, under the controlled action of the hydraulic pressure, is initially preformed to an extension of 10-15% of initial dimensions of the sheet metal blank and then, with continuing hydraulic pressure, the sheet metal blank is finally shaped by drawing without further extension until the sheet metal blank completely conforms to the shaped outline.

REFERENCES:
patent: 3632347 (1972-01-01), Burk
patent: 4045986 (1977-09-01), Laycock et al.
patent: 4409808 (1983-10-01), Festag et al.
patent: 4409809 (1983-10-01), Buchanan

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