Machine tool with a sliding screw drive

Details Machine tool with a sliding screw drive Machine tool with a sliding screw drive

Filed on

1988-04-19

Date issued

1989-08-01

Examiner

Schmidt, Frederick R.

Patent Class

Turning

SubClass

Lathe

SubSubClass

With program control

Other Related Categories

82147, 82148, 82165, 318 35, 318103, 318569, 36447402, 279 1H, 51165R, 5116592, 408 3, 409240, B23B 300, B23B 700, B23B 1500

Type

Patent

Status

active

Patent number

048524344

Description

ABSTRACT:
A machine tool having a work spindle with an electrically actuated clamping unit including a three-phase motor with a stationary stator. The motor is supplied with electricity from a control unit operating with frequency conversion, and the control unit is alternatingly also used for triggering a spindle drive motor. A sensor detects clamping force applied to a workpiece, and produces a signal used to reduce motor speed of the three-phase motor until a predetermined clamping force is achieved.

REFERENCES:
patent: 3605533 (1971-09-01), Dugle
patent: 3757179 (1973-09-01), Pepersen
patent: 4257103 (1981-03-01), Suzuki et al.
patent: 4289997 (1981-09-01), Jung et al.
patent: 4297624 (1981-10-01), Komiya
patent: 4335633 (1982-06-01), Boffelli
patent: 4567794 (1986-02-01), Bald
patent: 4639645 (1987-01-01), Hartwig
patent: 4641069 (1987-02-01), Fujioka et al.

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