基于试验验证的数控铣床夹紧套的结构优化

摘要

In order to reduce stress concentration of clamping sleeve in the precision milling machine,in this paper the SolidWorks and ANSYS software was applied to optimize the structure.Firstly,a simplified model of clamping sleeve that did not include the local structure was established in SolidWorks.The finite element analysis confirmed the validity of the simplified model with the experimental deformation data.Then,the deformation and stress response surface was established by using the neural network method.The multi-objective genetic algorithm was applied to optimize the clamping sleeve.The calculated results show that the maximum equivalent stress in the optimal clamping sleeve reduced about 70% comparing with that of raw clamping sleeve,in which the stress concentration of clamping sleeve improved obviously.%为了降低精密铣床中夹紧套的结构应力集中程度,采用SolidWorks和ANSYS软件对夹紧套进行了结构优化设计。首先,在SolidWorks中创建了没有考虑夹紧套局部结构的简化模型,结合夹紧套通压变形试验数据,有限元分析结果验证了该简化模型的有效性;然后采用神经网络方法构造了夹紧套变形和应力的响应面,在此基础上,利用多目标遗传算法完成夹紧套的结构优化设计。计算结果表明夹紧套优化方案的最大等效应力相对于原始设计方案降低了70%左右,显著地改善了夹紧套的应力集中程度。