考虑过程能力指数的参数和容差并行设计方法  

Parameter and Tolerance Concurrent Design Method with Process Capability Index Considered

作　　者：伍建军[1] 周敏 蔡伟 WU Jianjun;ZHOU Min;CAI Wei(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《机械科学与技术》2024年第10期1747-1753,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金地区科学基金项目(51665017)。

摘　　要：针对传统田口产品优化设计中先参数设计后容差设计试验次数多、制造成本高的问题,引入非对称质量损失和考虑过程能力指数的参数和容差并行设计,在保证产品质量的同时,有效的节约了制造成本。首先,进行中心复合试验设计,再由试验数据建立均值和方差的响应曲面模型;随后提出非对称质量损失函数以及根据经验数据建立容差成本模型,之后再构建改进的过程能力指数;最后将非对称质量损失函数和容差成本模型代入过程能力指数函数中,并利用改进遗传算法(NSGA-Ⅱ)寻优同时得出参数及其容差组合。通过桥式放大机构试验的实例分析,说明该方法提高了产品的质量性能,并减少了生产运作成本。The traditional Taguchi product optimization design should be tested many times and has high manufacturing cost.Therefore,we introduce the asymmetric quality loss and the parameter and tolerance concurrent design method with the process capability index considered.The concurrent design can effectively save the high manufacturing cost while ensuring the product quality.Firstly,the central composite experimental design is carried out,and then the response surface model of mean and variance is established with the experimental data.Then the asymmetric quality loss function is proposed and the tolerance cost model is established according to the empirical data.The improved process capability index is constructed.Finally,the asymmetric quality loss function and tolerance cost model are substituted into the process capability index function,which is optimized with the improved genetic algorithm(NSGA-Ⅱ).At the same time,the parameters and their tolerance combinations are obtained.The numerical analysis of bridge amplification mechanism tests shows that this method improves the quality and performance of products and reduces the production and operation costs.

关 键 词：参数设计 容差设计 并行设计 过程能力指数 非对称质量损失 

分 类 号：TH112[机械工程—机械设计及理论]