| Super-heavy high-grade CNC machine tool spindle system is a system in a very important part, it not only affects the performance of the machine tool, is a very important part in technical and economic criteria. Therefore, in order to provide super-heavy high-grade CNC machine quality and excellent performance of the spindle system, key technology of the spindle system in-depth research and rational design is of great theoretical and practical significance.The spindle of machine tool is one of the important parts of the whole transmission system. The performance of the spindle system directly affect the machining accuracy of machine tool. Taking C61450 super-heavy horizontal lathe spindle system as the research object, using the finite element method(fem) to the main shaft system has carried on the analysis of the dynamic and static performance. And optimize the spindle assembly design. To improve the dynamic and static performance of the spindle system, reduce the weight of the spindle system.Mainly finished the following work:(1) On the main shaft system dynamics model is set up, theoretically analyses the dynamic and static characteristic of the spindle system.(2) Taking ANSYS software, the establishment of finite element model of the spindle system, and the dynamic and static performance analysis of the spindle system, obtained prior to optimization of the main shaft of the various parameters of dynamic and static performance.(3) To the original spindle system of dynamic and static performance parameters for the standard, reducing spindle weight as the objective. Through the analysis of the span of spindle, axial length and diameter of the spindle system of dynamic and static performance, improving the structure of the spindle assembly.After optimization, the quality of the main shaft to reduce by 11%, static stiffness increased 7%, the first order natural frequency increased.Main shaft system in the maximum working frequency(1.33 Hz), maximum amplitude also fell. |
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