Machine tool

Details Machine tool Machine tool

1990-09-04

1991-04-23

Briggs, William

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

10129R, 408129, 408238, B23C 106, B23B 4706

Patent

active

050095544

ABSTRACT:
A machine tool with a spindle for machining a large-diameter workpiece in that a servo motor for moving a spindle in the axial direction and a variable reluctance motor for rotating the spindle are installed in a housing, and a synchronous controller for synchronizing and driving the above-mentioned servo motor and the variable reluctance motor is provided. The variable reluctance motor has a characteristic in that a large driving torque can be obtained in a low rotating speed. By using a variable reluctance motor as a spindle motor, therefore, it is possible to obtain a large torque without providing a large size motor, and also possible to realize a large-diameter machining by a small-size unit.

REFERENCES:
patent: 4167218 (1979-09-01), Horiuchi
patent: 4534686 (1985-08-01), Nakamura et al.
patent: 4583894 (1986-04-01), Mitchell
patent: 4925348 (1990-05-01), Krusi

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