Method of thread rolling a screw shaft

Details Method of thread rolling a screw shaft Method of thread rolling a screw shaft

1997-01-31

1998-04-28

Crane, Daniel C.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

470 10, B21H 306

Patent

active

057431230

ABSTRACT:
In a method of thread rolling a screw shaft, an inclining portion 1c is provided between a machining portion 1a of a screw shaft 1 and a non-machining portion 1b thereof as well as a taper portion 2b is formed to screw groove forming dies 2, by which a machining load concentrating at the thread rolling portion on the end of the dies adjacent a chuck can be reduced. With this method, the screw shaft can be thread rolled to have straightness of high quality.

REFERENCES:
patent: 440333 (1890-11-01), Rogers
patent: 2183688 (1939-12-01), Olson
patent: 2314390 (1943-03-01), De Vellier

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