Process for bending metal sheet

Details Process for bending metal sheet Process for bending metal sheet

1977-02-17

1977-12-06

Gilden, Leon

72352, 72379, B21C 3702

Patent

active

040610985

ABSTRACT:
A process for bending on a press a metal sheet through a desired angle and an inner bend radius less than the thickness of the sheet, without causing damages such as cracking in a bend. According to this process, a metal sheet is first bent through an angle approximating a desired angle, with an inner bend radius being greater than the thickness of the metal sheet, and then the metal sheet thus bent is further bent through a desired angle, with the inner bend radius being less than the thickness of the metal sheet, and with the stretching of a material of the metal sheet on the outer side of the bend being suppressed.

REFERENCES:
patent: 1888891 (1932-11-01), Schmidt
patent: 2830645 (1958-04-01), Huet
patent: 3013451 (1961-12-01), Scribner
patent: 3540252 (1970-11-01), Pfanner
patent: 3857270 (1974-12-01), Iten

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