Superprecision lathe

Details Superprecision lathe Superprecision lathe

1987-02-10

1988-08-30

Schmidt, Frederick R.

Turning

Severing or cut-off

Interrelated means for tool infeed and circumrotation

82 28R, 279 3, 384113, 384120, B23B 1902

Patent

active

047667885

ABSTRACT:
In a superprecision lathe of the present invention, a main spindle having mounted at one end thereof a vacuum chuck rotatably supported in an air bearing fixed on a headstock. There is formed within the main spindle a first vacuum passage connected to the vacuum chuck and opened at the outer surface of the main spindle, and a second vacuum passage formed in the headstock and of which an open end to be connected to a vacuum pump and is opened at the inner surface of the air bearing. The first vacuum passage is connected to the second vacuum passage through an interconnection region defined by two annular grooves formed at the opposite positions of the outer surface of the main spindle and the inner surface of the air bearing; therefore, it is not necessary to use a specific sealing member, any external vibration is not transmitted to the main spindle, and the object can be worked effectively with a high speed rotation of the main spindle.

REFERENCES:
patent: 3533316 (1970-10-01), Porath
patent: 3690780 (1972-09-01), Bjelland et al.
patent: 3735652 (1973-05-01), Scharten
patent: 3761146 (1973-09-01), Unno et al.
patent: 4596169 (1986-06-01), Inove et al.

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