Patent EP0051937A1 successfully refreshed from Google Patents.
EP0051937A1
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EP
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Apparatus for detecting the position of a machine tool spindle
Assignee: Kitamura Machinery Co Ltd
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Filing: 1981-10-20
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Granted: —
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Expires: 2001-10-20
Abstract
Abstract The position of a machine tool spindle thermally displaced by the heat generated in the spindle bearing or the like is detected in the x and y directions, respectively, as a zero point by a single proximity switch (15) and the count values of x-axis and y-axis counters of an NC control panel are subjected to zero point calibration, whereby the resulting point is used as the origin of the coordinates. This enables machining of work with a high degree of accuracy at a high spindle speed where the spindle is subject to thermal displacement due to the heat generated in the spindle bearings or the like.
Inventors
- 👤 Koichi Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:27
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/12; G05; G05B; G05B19/00; G05B19/02; G05B19/18; B; B23; B23Q; B23Q3/00; B23Q3/155; B23Q3/1552; B23Q3/15526; B23Q3/15534
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
An apparatus for detecting the position of a spindle of a machine tool comprising: a proximity switch fixedly mounted on a base; a proximity member slidably mounted on said base and having a sensing hole formed therein adjacent to said proximity switch; a contactor coupled to said proximity member; and means whereby when said contactor and said proximity member are displaced, said contactor and said proximity member are returned to the original positions thereof, said base being fixedly mounted on a table of said machine tool, whereby measuring means mounted on the spindle of said machine tool is contacted with said contactor and said table is moved in an X direction and a Y direction, respectively, thereby actuating said proximity switch.
Claim 2
Independent Claim
121 words
An apparatus for detecting the position of a spindle of a machine tool comprising: a proximity switch fixedly mounted on a base; a proximity member slidably mounted on said base and having a sensing hole formed therein adjacent to said proximity switch; a contactor coupled to said proximity member; and means whereby when said contactor and said proximity member are displaced, said contactor and said proximity member are returned to the original positions thereof, said base being fixedly mounted on a table of said machine tool, whereby measuring means mounted on the spindle of said machine tool is contacted with said contactor and said table is moved in an X direction and a Y direction, respectively, thereby actuating said proximity switch.
Claim 3
Dependent Claim
158 words
An apparatus according to claim 1, wherein said return means comprises: a coupling member having a hole formed substantially in the central portion thereof and secured to said base; a sliding plate having a hole formed substantially in the central portion thereof and secured to said proximity member, and a connecting member movably fitted in said holes of said sliding plate and said coupling member, wherein two rods crossing each other at right angles are fixedly fitted in said connecting member in such a manner that one of said rods is slidably inserted in said coupling member and the other of said rods is slidably inserted in said sliding plate, and wherein said connecting member is formed with a plurality of blind holes along each of said rods to extend parallel thereto and a spring is fitted in each of said blind holes and each of tapped holes formed in said coupling member and said sliding plate, respectively.
Claim 4
Dependent Claim
19 words
An apparatus according to claim 1, wherein one of side walls of said sensing hole is partly cut out.
Claim 5
Dependent Claim
39 words
An apparatus according to claim 1, wherein said sensing hole is formed into a rectangular shape, and wherein the longitudinal center of said sensing hole is slightly displaced from the center of a sensing element of said proximity switch.
Claim 6
Dependent Claim
25 words
An apparatus according to claim 1, wherein an upper surface of said contactor is cut out at right angles to form a recessed portion thereon.
References Cited (Backward Citations)
US3636814A
Cited
US3684939A
Cited
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