Transactions of Materials and Heat Treatment

Title：Prediction and optimization on folding defect for connecting rod based on secondary development of Deform

Authors： Wu Huan Chen Kang Dai Xiandong Huang Sitao Sun Yang Zhang Jinliang Cao Jianguo

Unit： Sichuan University

KeyWords： folding defects connecting rod folding probability index secondary development Deform

ClassificationCode：TG316

year,vol(issue):pagenumber：2022,47(2):12-18

Abstract：

In order to solve the folding defect in the production process of marine connecting rod in a certain factory, the optimization analysis was conducted by software Deform. Since the folding defect of connecting rod was not accurately predicted by the folding angle that comes with the software Deform, the folding probability index was embedded in the software Deform by secondary development to predict the folding defect, and the prediction result was consistent with the actual situation. Then the cause of the folding defect in the fillet transition zone was found by material flow analysis. The influences of fillet radius in blank fillet transition zone, final forging temperature and die pressing speed on the folding probability index were explored, and combined with orthogonal experiments, the optimal process parameters were found and simulated in the software Deform after the secondary development. The simulation result shows that the folding condition is greatly improved. Finally, the factory trial production was carried out. And the shapes of obtained forgings are refined, the folding rejection rate is reduced from 20.97% to 0.91%, and the microstructures and grain sizes reach the production requirements, which verifies the effectiveness of the process optimization and provides a reference for the optimization of similar folding defects.

Funds：

四川省科技厅重点研发项目(2019YFG0454）；川大-泸州校地合作重点项目(2021CDLZ-3) ；四川大学校地战略合作科技创新研发项目(2018CDPZH-26、2019CDLZ-16)

作者简介：武欢(1996-)，女，硕士研究生，E-mail：13408472434@163.com；通信作者：曹建国(1971-),男，博士，副教授，E-mail：cjgkl@sina.com

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