基于变形敏感性分析的机床整机刚度优化分配方法  

Optimized Distribution Method on Whole Stiffness of Machine Tool Based on Distortion Sensitivity Analysis

作　　者：黄强 杜雪飞 HUANG Qiang;DU Xuefei(School of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,Chin)

机构地区：[1]重庆理工大学机械工程学院,重庆400054

出　　处：《机床与液压》2018年第13期6-10,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51075419)

摘　　要：机床整机刚度的优化分配可以提高机床性能和降低成本。以某精密数控车床为例,结合多体系统理论和齐次坐标变换原理,建立了机床整机刚度与部件刚度之间的映射关系模型。利用该模型,定量计算各部件刚度对机床整机刚度的影响程度。以此为依据,选择最有效的优化部件及其刚度方向。最后,以成本最低为优化目标,采用遗传算法,完成机床主要部件刚度的优化分配。这种方法能够提高机床刚度控制的效率和效果。Optimized distribution on whole stiffness of machine tool can improve the performance of machine tool and cut the cost.Taking a precise numercial control（ NC） lathe as an example,combining the multi-body system theory with the homogeneous coordinates transformation,A mapping relationship model between the whole stiffness of machine tool and its components is established. The change value of whole stiffness caused by component stiffness was calculated by this model. According to these calculations,the best effective components and its optimized direction were selected. Taking the minimum cost as an optimized goal,optimized distribution of major component stiffness is finished by the genetic algorithm. This method can improve the efficiency and result on stiffness control of machine tool.

关 键 词：整机刚度 优化分配 多体系统 变形敏感性 遗传算法 

分 类 号：TH113[机械工程—机械设计及理论]