Process of and apparatus for ironing work for bolt and the same

Details Process of and apparatus for ironing work for bolt and the same Process of and apparatus for ironing work for bolt and the same

1996-07-25

1998-01-13

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72358, 72352, B21D 2200

Patent

active

057066973

ABSTRACT:
A process of ironing a thread formation shaft portion of a work for bolt having a cylindrical portion and the thread formation shaft portion in axial alignment. The process comprises the steps of supporting the cylindrical portion of the work in radial directions and in a zero clearance state, and moving the thread formation shaft portion in the axial direction relative to a shaft portion ironing die, the supporting step and the moving step being executed simultaneously.

REFERENCES:
patent: 2030290 (1936-02-01), Friedman
patent: 2044986 (1936-06-01), Horton
patent: 2111046 (1938-03-01), Friedman
patent: 3055102 (1962-09-01), Shaw et al.
patent: 3157093 (1964-11-01), Shaw et al.

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