Development of temperature control system for machine tools and fundamental evaluation of control performance

Abstract

Thermal deformation of machine tools is one of the main causes of deterioration of machining accuracy. Accordingly, controlling temperature of the spindle and other components of the machine tools is significantly important to achieve desired machining accuracy. In general, forced fluid cooling is used for removing generated heat in machine tools. It is desired to change the cooling conditions for the temperature change of the target component, which is dependent on various machining conditions. However, conventional cooling methods do not have sufficient temperature control performance. Here, we propose a new method of fluid temperature control that achieves precise temperature control with better responsiveness. The control performance of the developed temperature control system was evaluated experimentally.