THERMAL DISPLACEMENT COMPENSATION DEVICE FOR MACHINE TOOL
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United States of America Patent
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Jan 26, 2017
app pub date -
Jul 15, 2016
filing date -
Jul 21, 2015
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Abstract
A thermal displacement compensation device detects the temperature of a machine tool and the temperature of an environment in which the machine tool is placed, and estimates a temperature distribution in a machine component affected by the temperature of the environment from the relationship between the temperature of the machine tool and the temperature of the environment. Based on the estimated temperature distribution in the machine component, a position in the machine tool at which the time constant of the detected temperature matches the time constant of thermal displacement of the machine component affected by the temperature of the environment is found and set. Using temperature at the set position as a revised temperature of temperature detected by the machine temperature detection section, a thermal displacement amount of the machine component is calculated.
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