Method and apparatus for compensating for thermal distortion for a machine tool
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Jun 2, 1995
filing date -
Jun 16, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A temperature change of a machine tool which is influenced by a heat generating source is detected by a temperature sensor. A temperature change having substantially the same time constant as a time constant of a thermal distortion of the machine tool is calculated by using the detected temperature change. A machining error is corrected on the basis of the thermal distortion corresponding to the calculated temperature change. According to a method and an apparatus for compensating for the thermal distortion in the machine tool, it is possible to perform the compensation relative to the thermal distortion with high precision. The invention is applied to a machine tool such as a machining center and an NC lathe.
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