基于仿真分析的BT40主轴系统公差设计与优化

Tolerance Design and Optimization of BT40 Spindle System Based on Simulation Analysis

公差设计质量直接影响产品的性能和制造成本。为提高主轴系统公差设计的质量和效率,提出了一种基于建模仿真的公差设计与优化方法。模拟BT40主轴系统的结构和装配过程,首先在CETOL6σ软件中建立主轴系统的数字化公差模型,利用该模型分析各主要公差对系统输出精度的贡献度和敏感度。然后以类比法公差设计作为原始方案,仿真检验其设计效果。最后以公差贡献度和敏感度为依据,对原有公差设计方案进行修正及优化。结果表明:优化后的方案显著提高了主轴系统的输出精度。

The quality of tolerance design directly affects performance and manufacturing cost of the product. In order to improve the quality and efficiency of tolerance design in the spindle system, a tolerance design and optimization method based on modeling and simulation was proposed. Simulating the structure and assembly process of the BT40 spindle system, the digital tolerance model of this spindle system was established by CETOL6σ software firstly. Using this model, the contribution and sensitivity of that various main tol- erances influence system output accuracy were analyzed. Then, taking the tolerance design scheme by analogy method as the original one, the design effect was inspected hy simulating. According to the contribution and sensitivity of various main tolerances, the original tolerance design scheme was modified and optimized finally. The results show that the optimized scheme improve the output accuracy of spindle system observably.