給気温度制御による空気静圧主軸の熱変形抑制(機械要素,潤滑,工作,生産管理など)

概要

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In order to meet the demands for high machining accuracy and high machining productivity, it has been increasing to apply aerostatic spindle systems for ultraprecision machine tools. An aerostatic spindle generates a large amount of heat at high speed rotation, which causes thermal deformation of the spindle system. In this study, in order to establish the practical method for minimizing the thermal deformation of aerostatic spindle system, a cooling method of the spindle system is investigated using temperature controlled supply air. By controlling the temperature of supply air to keep exhaust air at a constant temperature, its cooling amount effectively cancels out the heat generated at bearing clearance. Through a series of experiments, it has been proved that the proposed method can restrain the temperature rise and the thermal deformation of system structures.
2004-12-25