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《Ordnance Material Science and Engineering》 2018-06
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Optimization of hydroforming process parameters of bi-layered 316L/Inconel625 bellows based on response surface method

CUI Lei;LIU Jing;LI Lanyun;School of Materials Science and Engineering,Xi′an Shiyou University;  
In order to solve the problems of underforming,wrinkling,and cracking in the hydroforming process of bi-layered bellows,the response surface method combined with finite element numerical simulation was used to optimize the hydroforming process parameters of bellows.The maximum wall thinning degree and convolution height were selected as the optimization goals,while the die spacing,internal pressure,and friction coefficient were taken as the influencing factors.The second-order response surface model between the optimization goals and variables was built,and the multi-objective optimal process parameters combination was obtained.When the die spacing is between 24.5 and 27.1 mm,the friction coefficient is between 0.1and 0.5,and the internal pressure is changed within the range from 9.00 to 10.53 MPa,the optimal conditions of convolution height and the maximum wall thinning degree can be satisfied at the same time.In actual production,the bellows with low wall thinning degree and satisfied convolution height can be obtained with the optimized process parameters,indicating that the optimization method is reliable.
【Fund】: 国家自然科学基金(51875456);; 陕西省高校科协青年人才托举计划项目(20170518);; 研究生创新与实践项目(YCS17211032);; 西安石油大学《材料科学与工程》省级优势学科资助项目;西安石油大学青年科研创新团队资助项目(2015QNKYCXTD02)
【CateGory Index】: TG306
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