통계적 기법에 의한 24,000rpm 초고속 스핀들 개발

The spindle system with a built-in motor can be used to simplify the structure of machine tools, to improve the machining flexibility of machine tools, and to perform the high speed machining. In this system the shaft is usually assumed as a rigid rotor. In the high-speed spindle system design, it is very important to know the contribution ratio of core parts to improve static and dynamic stiffness. The natural frequency and deformation of the spindle end is obtained by FEM mode analysis. And statistical method was used to draw most suitable condition of each part.