Method of making clear dies from bar stock

Details Method of making clear dies from bar stock Method of making clear dies from bar stock

1984-04-13

1987-01-20

Parker, Roscoe V.

Metal tools and implements, making

Machines

Die-forming

76107C, 72389, 72412, B21K 520

Patent

active

046372822

ABSTRACT:
A method and apparatus for making cutting dies having sidewalls diverging from the cutting edge from thin bar stock having an internal side and an external side. A section of bar stock is cut at least as long as the perimeter of the die. Starting at one end the section is successively bent and advanced according to a pattern, making internal bends between a first set of tools and external bends between a second set of tools. The first set of tools, has a female tool with a sloping surface supporting the external side of the bar stock with the cutting edge pointed outwardly, and a tapering slot, and a male tool, having a sloped bending-edge aligned with the slot in the female tool for pushing the bar stock into the slot and bending it. The second set of tools, has a female tool with a sloping surface for supporting the internal side of the bar stock with the cutting edge pointed inwardly, and a tapering slot, and a male tool, having a sloped bending-edge aligned with the slot in the female tool for pushing the bar stock into the slot, and bending it.

REFERENCES:
patent: 922926 (1909-05-01), Lynch
patent: 1837524 (1931-12-01), Braden
patent: 2281587 (1942-05-01), Latham

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