Stretch shaping method and apparatus

Details Stretch shaping method and apparatus Stretch shaping method and apparatus

1989-08-21

1990-11-20

Crane, Daniel C.

Metal deforming

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

By individually non-deforming clamps

72 57, B21D 2500, B21D 3908

Patent

active

049708864

ABSTRACT:
A method for stretch shaping an elongated metallic extrusion is disclosed comprising the steps of applying axial tension to an elongated metallic extrusion in an amount sufficient to equal or exceed the yield strength of the extrusion. An external shaping die is applied against a perimetric portion of the outside surface of the extrusion. The die has working faces conforming substantially to a finished cross-sectional shape for the extrusion. While maintaining such tension the die is advanced along a length of the extrusion. An apparatus for stretch shaping an elongated metallic extrusion is also disclosed.

REFERENCES:
patent: 2927372 (1960-03-01), Powell
patent: 3257832 (1966-06-01), Harvey
patent: 3550420 (1970-12-01), Swanson
patent: 3552175 (1971-01-01), Kinnavy
patent: 4704886 (1987-11-01), Evert et al.
patent: 4827753 (1989-05-01), Moroney

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