Process and device for forming a corrugated metal sheet and corr

Details Process and device for forming a corrugated metal sheet and corr Process and device for forming a corrugated metal sheet and corr

1995-04-24

1997-05-06

Larson, Lowell A.

Metal deforming

Process

Deforming sheet metal

72 56, 72 38, 723792, B21B 900, B21C 3702, B21D 2602, B21J 504

Patent

active

056260512

ABSTRACT:
A process for forming a corrugated metal sheet (1) which includes perforations (2) over its entire surface, in which process the metal sheet (1) is laid on a die (11) provided with corrugations (11b), the space (13) delimited beween the metal sheet (1) and the die (11) is sealed by blocking off the perforations (2) in the metal sheet (1), an explosive charge (16) with remote-controlled firing is placed on top of the upper face of the metal sheet (1), a vacuum is created in the space (13) delimited between the metal sheet (1) and the die (11), the entire assembly is immersed in a firing tank filled with water, and firing of the explosive charge is initiated, so that the energy release presses the metal sheet (1) against the die (11). The invention also includes a device for forming a corrugated metal sheet and a corrugated metal sheet formed by the process.

REFERENCES:
patent: 3670393 (1972-06-01), Almond
patent: 3785788 (1974-01-01), Haggberg et al.
patent: 4597916 (1986-07-01), Chen
patent: 4604247 (1986-08-01), Chen et al.

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