Metal deforming – By use of non-deforming work-gripping clamp and relatively... – By individually non-deforming clamps
Patent
1993-04-05
1994-07-12
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
By individually non-deforming clamps
72 61, B21D 1102, B21D 2602
Patent
active
053277643
ABSTRACT:
Disclosed is apparatus and a method for the stretch forming of an elongated hollow metal section, such as an aluminum extrusion. The apparatus and method uses one or more constraining means secured to the forming die and a die extension to constrain and support the walls of the elongated hollow metal section against the forces produced by air pressure within the interior of the hollow metal section. The apparatus and methods disclosed herein prevent the formation of wrinkles, crimps and bulges in the walls of the elongated hollow metal section during the stretch forming and reshaping thereof.
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Evert Robert P.
Weykamp Robert E.
Aluminum Company of America
Crane Daniel C.
Iverson John I.
Trempus Thomas R.
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