Method of optimizing the operation of a computer controlled mach

Details Method of optimizing the operation of a computer controlled mach Method of optimizing the operation of a computer controlled mach

1978-06-05

1980-06-17

Ruggiero, Joseph F.

Boots, shoes, and leggings

364105, 408 10, 318571, 409 80, 318561, G05B 1302, G06F 1546, B23Q 1500

Patent

active

042087180

ABSTRACT:
The feed rate of a computer controlled machine tool is periodically calculated every 9.6 milliseconds to produce a horsepower equal to a target horsepower at the cutting tool during a milling operation. When the feed rate rises above a predetermined level, the target horsepower is progressively lowered, and when the feed rate drops below a predetermined level, the target horsepower is progressively raised. The total amount of cutting time for each tool is measured and the amount of cutting time under increased target horsepower is also measured. When the amount of cutting time under increased target horsepower exceeds a predetermined percentage of the total cutting time for any given tool, a DULL TOOl signal is generated and the designated tool is subsequently replaced. If no cutting time is recorded, a BROKEN TOOL signal is generated and the broken tool is replaced. When the cutting tool encounters an air gap in the workpiece, the spindle speed is increased and the feed rate is increased to provide a fast feed rate through the air gap. The feed rate and spindle speed are both reduced when the cutting tool re-engages the workpiece after passing through the air gap.

REFERENCES:
patent: 3446099 (1969-05-01), Lesher et al.
patent: 3571834 (1971-03-01), Mathias
patent: 3665493 (1972-05-01), Glowzewski
patent: 3851550 (1974-12-01), Schalles
patent: 4031368 (1977-06-01), Colding et al.
patent: 4031437 (1977-06-01), Dempsey et al.
patent: 4078195 (1978-03-01), Mathias et al.
"Adaptive Control" Published by Bendix Industrial Controls Division, Detroit, Mich.

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