A Study on the Thermal Behavior of Bearing Surroundings using State-Space in Machine Tool Spindle System

공작기계 스핀들시스템에서 상태공간을 이용한 베어링 주변의 열거동에 대한 연구

This paper proposes the state-space model of the thermal behavior of the spindle system to establish dynamic mathematical model of thermal characteristics in machine tool spindle system. the model is derived form physical law of heat transfer and thermoelasticity and represents the thermal behavior induced by uneven thermal expansions whitin a bearing. The model, which is sucessfully validated for two typical configurations of high speed spindle assembles, provides a tool for understanding the basis mechanics of induced thermal expansion as a function of initial preload, spindle speed and housing cooling conditions.