Geometrical instruments – Area integrators – Electrical
Patent
1981-11-05
1983-11-08
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
33174PC, G01B 700, G01B 1100
Patent
active
044134223
ABSTRACT:
An apparatus for detecting the position of a machine tool spindle is intended to detect the position of the thermally displaced spindle in the x and y directions, respectively, by a single proximity switch to prevent the accuracy of machining from being deteriorated by the thermal displacement due to the heat generation in the bearing or the like of the spindle operated at a high speed, and the apparatus includes a proximity switch fixedly mounted on a base, a proximity member having a sensing hole formed therein adjacent to the proximity switch and slidably mounted on the base, a contactor coupled to the proximity member, and mechanisms for returning the contactor and the proximity member into their original positions in response to the displacement thereof, the base being fixedly mounted on the table of the machine tool, and the contactor being formed with a right angle x-direction and y-direction contact surface adapted for contact with a measuring element mounted on the spindle of the machine tool, thereby using the detected values as zero points and subjecting the count values of coordinates x-axis and y-axis counters of an NC control panel to zero point calibration and using the resulting point as the origin of coordinate in the processing of the work.
REFERENCES:
patent: 3614909 (1971-10-01), Neuser
patent: 3684939 (1972-08-01), Perry
patent: 3995528 (1976-12-01), Rethwish
patent: 4060906 (1977-12-01), Heizmann
patent: 4118871 (1978-10-01), Kirkham
patent: 4333238 (1982-06-01), McMurtry
Kitamura Machinery Co. Ltd.
Stearns Richard R.
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