Contoured stamping die

Details Contoured stamping die Contoured stamping die

1979-02-12

1980-10-14

Combs, Ervin M.

Metal deforming

Tool and/or tool holder

Tool-comprising die plate having ribs and/or grooves

72476, 72478, B21J 1302, B21D 3700

Patent

active

042273960

ABSTRACT:
A method for manufacturing a contoured die wherein a workpiece is formed with depressions extending across the top surface of the workpiece from front to back thereof. The depressions are formed spaced apart from one another to retain flat top surface portions therebetween. Smoothly contoured edge surfaces are then formed on the workpiece in the regions of intersection of the top surface with the front and back surfaces, to produce a die with ridge projections surrounded by top surface portions having a concave elevational contour as viewed in a vertical plane perpendicular to the side surfaces of the workpiece.

REFERENCES:
patent: 1920699 (1933-08-01), Hurley
patent: 2165008 (1939-07-01), Rosenberg
patent: 2440963 (1948-05-01), Luce
patent: 2552455 (1951-05-01), Pond
patent: 3100411 (1963-08-01), Airlie
patent: 3151504 (1964-10-01), Pare et al.
patent: 3498158 (1970-03-01), Kougel
patent: 3895947 (1975-07-01), Sarka
patent: 3910138 (1975-10-01), Sinha et al.
patent: 4024623 (1977-05-01), Kun
patent: 4133227 (1979-01-01), Crowe et al.

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