Thread rolling apparatus

Details Thread rolling apparatus Thread rolling apparatus

1989-04-11

1991-12-31

Crane, Daniel C.

Metal deforming

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

During rotation of work

B21H 306

Patent

active

050760866

ABSTRACT:
A thread rolling apparatus has thread rolling dies mounted respectively on a pair of sliding mechanisms which are vertically movably driven by respective actuators, and a support disposed between the thread rolling dies for rotatably supporting a workpiece. The sliding mechanisms and the support are interconnected by a rack and pinion mechanism for imparting a forced rotational drive force to the workpiece in synchronism with the movement of the sliders. The lead angle of the thread rolling dies is set to match the forced rolling diameter of the workpiece. By adjusting the distance between the thread rolling dies in matching relation to the workpiece diameter before threading, the thread rolling apparatus can form different screws having equal pitches and different nominal diameters.

REFERENCES:
patent: 408529 (1889-08-01), Rogers
patent: 408530 (1889-08-01), Rogers
patent: 408673 (1889-08-01), Rogers
patent: 411480 (1889-09-01), Warren
patent: 1940367 (1933-12-01), Nagel
patent: 3914083 (1975-10-01), Arai
patent: 4155237 (1979-05-01), Jungesjo

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