Abstract：In order to enhance the machine tool headstock’s comprehensive performance of static, dynamic, thermal, it must have good structure. The finite element model of a machine tool headstock was established in CAE software ANSYS, then its thermal-mechanical coupling analysis and modal analysis were conducted. The multi-objective orthogonal optimization design for headstock was carried on through taking the headstock’s mass, the maximum coupling stress, the maximum coupling deformation, the fist-step natural frequency as objective functions, the length, the width and the height of headstock’s main body as design variables. The best solution of optimization design was obtained by using grey relational analysis method, which made headstock’s mass only increasing 2.585%, the maximum thermal-mechanical coupling stress reducing 9.817%, the maximum thermal-mechanical coupling deformation reducing 16.393%, and the first-step natural frequency enhancing 8.634%. Studies have shown that the orthogonal experimental method and grey relational analysis have high engineering practicability.
2011, Vol. 30 
