Formation of shapes in a metal workpiece

Details Formation of shapes in a metal workpiece Formation of shapes in a metal workpiece

1991-05-03

1992-09-08

Larson, Lowell A.

Compound tools

Cutter combined with other tool or tools

723792, 29557, 29827, 357 70, 437925, B21D 2800, B23P 1304, H01R 4300, H01L 2960

Patent

active

051447096

ABSTRACT:
A method and apparatus for forming a shape such as a cavity in a workpiece. An aperture is provided in the area in which the cavity is to be formed. Thereafter, the cavity is depressed into the metal causing the metal to flow into the area from which metal was removed by the aperture formation. If desired, after formation of the original aperture, the cavity may be partially depressed, and the aperture requalified to a circular shape. Thereafter, the cavity may be depressed into the workpiece to its final depth.

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