摘要
在机床精度优化设计过程中,传统精度分配中往往将误差视为常量,而忽略误差的分布情况.针对此问题,在分析传统精度分配方法基础上,提出一种基于二阶矩误差模型的五轴数控机床精度优化设计方法.定义二阶矩阵运算规则,用二阶矩阵表达机床精度指标,建立带分布的五轴数控机床误差模型,应用遗传算法对精度指标进行多目标优化求解,得到Pareto最优解集.以C100P五轴数控机床为例,验证本优化设计方法的可行性.与传统精度分配方法相比,在保证机床精度要求前提下,新方法能够降低机床装配成本.
During the process of machine tool precision optimization design,it often regards the error as constant and ignores error distribution in the traditional precision allocation.Based on the analysis of traditional precision allocation method,a precision allocation optimization design of five axis machine tool based on second-order moment error model was proposed to this.The second-order matrix operation rules were defined and the machine tool accuracy index was expressed by the second-order matrix,the error model of five axis machine tool with distribution was established and the multi-objective optimization of the accuracy index was solved by genetic algorithm to obtain the Pareto optimal solution set.Taking C100P five axis machine tool as an example,the feasibility of this optimization design method was verified.Compared with the traditional accuracy allocation method,it can reduce the assembly cost on the premise of ensuring the accuracy requirements of the machine tool.
作者
信世豪
张立强
李宇昊
XIN Shihao;ZHANG Liqiang;LI Yuhao(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai TOP Numerical Control Technology Co.,Ltd.,Shanghai 201100,China)
出处
《上海工程技术大学学报》
CAS
2022年第3期272-277,共6页
Journal of Shanghai University of Engineering Science
关键词
概率分布
二阶矩
误差传递模型
精度指标
多目标优化
probability distribution
second-order moment
error transfer model
accuracy index
multiobjective optimization
作者简介
信世豪(1997-),男,在读硕士,研究方向为智能制造装备.E-mail:1191872399@qq.com;通信作者:张立强(1979-),男,教授,博士,研究方向为智能制造装备.E-mail:zhanglq@sues.edu.cn
