Numerically controlled screw cutting method for fine screw surfa

Details Numerically controlled screw cutting method for fine screw surfa Numerically controlled screw cutting method for fine screw surfa

1990-09-18

1992-09-08

Schwartz, Larry I.

Turning

Process of turning

82118, 82110, 36447418, 36447433, 409 66, B23B 100, B23C 332

Patent

active

051448718

ABSTRACT:
A screw cutting method for use with a numerically controlled machining system is improved by enabling finer finishing of the final screw surface. The invention allows the removal of scars formed during rough machining by offsetting the position of the rough machining passes in the direction of screw cutting, i.e., in the direction of movement of the tool during cutting, so that during the final finishing pass, more material is removed from the screw surface opposing the cutting direction. Surface finish is further improved by specifically controlling the cutting depth in the cutting passes just preceeding the final cutting pass.

REFERENCES:
patent: 3854353 (1974-12-01), Cutler
patent: 4096770 (1978-06-01), Tanner
patent: 4173786 (1979-11-01), Kuhnell et al.
patent: 4580225 (1986-04-01), Thompson

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