Method & apparatus for shaping a sheet blank

Details Method & apparatus for shaping a sheet blank Method & apparatus for shaping a sheet blank

1993-10-13

1995-06-27

larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72 84, B21D 2218

Patent

active

054269644

ABSTRACT:
A method and an apparatus for cold-forming a sheet blank (2') made of a material with an exponential stress-strain behavior to become a thin-walled, hollow shell (2). The sheet blank (2') is clamped in a clamping means (3) with its circumference and rotatingly rotated around its center line (6). The shaping takes place by a first and a second path-controlled press roll (16, 17) engaging at opposite sides of the sheet blank (2') only by local pressure forces, wherein the relative speed between the workpiece (2', 2) and the press rolls and the force exerted by the press rolls to the workpiece are modulated in a manner that the tensile forces applied to the workpiece are below the yield point of the material.

REFERENCES:
patent: 3248918 (1966-05-01), Brown
patent: 3342051 (1967-09-01), Leszak
patent: 3783665 (1974-01-01), Ashizawa
patent: 3815395 (1974-06-01), Sass
patent: 4134284 (1979-01-01), Nitschke

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