Method of determining feed rate and cutting speed for cutting me

Details Method of determining feed rate and cutting speed for cutting me Method of determining feed rate and cutting speed for cutting me

1985-09-30

1987-11-17

Smith, Jerry

Boots, shoes, and leggings

318571, G06F 1546, G05B 1300

Patent

active

047077930

ABSTRACT:
A first set of parameters, including a preliminary cutting speed and a preliminary feed rate, is determined from the characteristics of the material to be cut, the cut to be made, the cutter, and the cutting machine. The hardness of the metal to be cut is coverted into Brinell hardness. The maximum allowable cutter force and a base cutting speed are calculated. The cutter force is the minimum of the maximum machine spindle side load and the forces required to: break the cutter at its shank, break the cutter at its flutes, and fracture the teeth. The maximum feed rate is calculated as the minimum of the maximum rates for: the desired surface finish, the maximum available horsepower, and the maximum force available. These calculation include correcting the maximum allowable cutter force and the maximum feed rate for fixture condition and machine condition and converting machine rate horsepower into spindle horsepower. Preferably, further calculations of cutting effects are made, including cutter deflection, actual cutting force, estimated tool life, and estimated surface finish. These effects may also be calculated separately using preset cutting speeds and feed rates.

REFERENCES:
patent: 3548172 (1970-12-01), Centner et al.
patent: 3784798 (1974-01-01), Beadle et al.
patent: 4031368 (1977-06-01), Colding et al.
patent: 4078195 (1978-03-01), Mathias
patent: 4208718 (1980-06-01), Chung
patent: 4346444 (1982-08-01), Schneider
patent: 4509126 (1985-04-01), Olig
patent: 4513381 (1985-04-01), Houser
patent: 4628459 (1986-12-01), Shinohara

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