Process for the production of drawing die bores

Details Process for the production of drawing die bores Process for the production of drawing die bores

1979-05-08

1982-03-30

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Die

76 4, 51 48R, 125 30WD, B24B 100

Patent

active

043218431

ABSTRACT:
A process for the production of drawing die bores, especially in hard metal or carbide wire drawing dies, wherein each bore has an inlet cone portion on the feed side of the die and a cylindrical calibrating portion along a common axis, the process being a two-step grinding and finishing procedure with a cross-grinding of the inlet cone in a first step and a calibrating grinding and finishing of the cylindrical portion in a second step. Especially preferred apparatus is described for each of these steps, with devices to operate in an automatic or semi-automatic manner to manufacture the finished drawing dies.

REFERENCES:
patent: 1367686 (1921-02-01), Connor et al.
patent: 3592084 (1971-07-01), Gelfand

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