Apparatus and method for machining an enveloping-type worm screw

Details Apparatus and method for machining an enveloping-type worm screw Apparatus and method for machining an enveloping-type worm screw

1984-03-13

1986-05-13

Weidenfeld, Gil

Gear cutting, milling, or planing

Gear cutting

Gear tooth shape generating

409 66, B23F 1500

Patent

active

045883378

ABSTRACT:
A method and apparatus are disclosed for machining hourglass screw threads on an enveloping-type worm screw by engaging at least one angularly positioned cutter with a screw blank having an hourglass shape. The screw blank is rotated about its central longitudinal axis at the same time that each angularly positioned cutter is pivoted through the screw blank at a rate which is less than the rate of rotation of the screw blank.

REFERENCES:
patent: 490503 (1893-01-01), Rominger
patent: 921593 (1909-05-01), Collier
patent: 1273533 (1918-07-01), Pfahler
patent: 2344323 (1944-03-01), Pelphrey

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