Flexible constraining apparatus and method for the stretch formi

Details Flexible constraining apparatus and method for the stretch formi Flexible constraining apparatus and method for the stretch formi

1993-04-05

1994-09-27

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

By individually non-deforming clamps

72 61, 72466, B21D 1102, B21D 2602

Patent

active

053498399

ABSTRACT:
Disclosed is apparatus and methods for the stretch forming of an elongated hollow metal section, such as an aluminum extrusion. The apparatus and methods use a flexible constraining means which surrounds at least a portion of the outer periphery of the elongated hollow metal section to constrain and support the walls of the elongated hollow metal section against the forces produced within the interior of the hollow metal section during the reshaping of the extrusion by the stretch forming operation. The apparatus and methods disclosed herein resist wrinkles, crimps and bulges being formed in the walls of the elongated hollow metal section during the stretch forming and reshaping thereof.

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patent: 5070717 (1991-12-01), Boyd et al.
patent: 5107693 (1992-04-01), Olszewski et al.
patent: 5214951 (1993-06-01), Waddell

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