Transactions of Materials and Heat Treatment

Title：Tolerance robust design for stamping parts based on metamodel and parameter uncertainty

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ClassificationCode：TG386

year,vol(issue):pagenumber：2019,44(4):177-182

Abstract：

In order to increase the reliability and stability of stamping parts and reduce the influences of metamodel uncertainty and parameter uncertainty on the quality of stamping parts, a robust design is needed. Then, a tolerance robust model with inner and outer loop structures was proposed, and the quality fluctuation caused by the uncertainty of controllable factors and uncontrollable factors was reduced effectively. Furthermore, the key controllable factors and uncontrollable factors were confirmed by likelihood function factor selection method, and the metamodel uncertainty was quantitated by revised Bayesian estimation. For the square box of NUMISHEET 93, the robustness optimization design was conducted, and the tolerance robust model was established by the mean and variance of objective and constraint functions. In addition, the robust optimization results were compared with the optimization results of ignoring metamodel uncertainty by Monte Carlo simulation. The results show that the robust design method considering comprehensively metamodel uncertainty and parameter uncertainty can effectively improve the forming quality of stamping parts.

Funds：

国家自然科学基金资助项目（51005193）; 四川省科技计划项目（2019YFG0313）

潘贝贝(1992-), 男, 硕士研究生 E-mail：15515332667@163.com 通讯作者：谢延敏(1975-), 男, 博士, 副教授 E-mail：xie_yanmin@home.swjtu.edu.cn

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