The Static And Dynamic Analysis Of The Machine Tool Spindle System And Its Optimization

The static and dynamic deformation of the machine tool spindle system is the main reason which affects the machining accuracy. So the static and dynamic analysis of the spindle system structure plays an important role in the design of machine tool. Utilizing the finite element analysis software into the designing machine tool will reduce a lot of work and improve the product.Based on the finite element method, this paper studies on the spindle system structure analysis and its optimization in the use of ANSYS, which is the software for finite element analysis. Firstly, importing the CAD models of parts and assembly of spindle system into ANSYS, the finite element model of the spindle system is established. It can simulate the function of bearing and interface. After applying the DOF constraints and loads on the model, the static, modal and harmonic analysis is done. It can be known that the static and dynamic performance of the spindle system from the results. Aiming at improving the performance of the product and retrenching the cost, the optimization of spindle and headstock is realized. Parameterizing the spindle model using APDL and adopting the design optimization tool in ANSYS, the optimum structure of this spindle is obtained, with better rigidity and higher limited speed. Comparing the performances of the different designs, the structure of the headstock is meliorated. After optimization, the headstock is easy for foundry.The paper contributes to the static and dynamic design of machine tool. The design can be meliorated according to these results. The period of design is shortened. And the efficiency is improved.