Transactions of Materials and Heat Treatment

Title：Improvement of cold forging process for screw sleeve based on finite element analysis

Authors： Li Rui1 You Xiaoyan2

Unit： 1.Institute of Intelligent Manufacturing Xinxiang Vocational and Technical College 2.Department of Science Henan Institute of Technology

KeyWords： EPB screw sleeve cold forging metal folding upsetting back extrusion floating back extrusion

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2024,49(8):21-28

Abstract：

In order to solve the problems of low productivity and high cost in the production of EPB screw sleeve by cold forging combined with machining, a fully automatic cold forging scheme was redefined, and based on the test using the actuel material, the whole process was simulated by Deform-3D. Then, the results shows that there are metal folding defects, and it is determined that the folding defect occurre at the heading station and the cause is metal bending by analyzing the metal flow. Furthermore, in order to eliminate the defect, the optimization was carried out on the basis of the original process, and the forming scheme of “upsetting+backward extrusion+floating back extrusion” was proposed to replace the original forming scheme of “forward extrusion+backward extrusion+heading”. The simulation results show that after the process optimization, the folding defects are completely eliminated, and the shape of part at each station is complete, the cross-sectional streamline is continuous, and the quality of screw sleeve is good. The actual forging test shows that there are no forming defects throughout the whole process, which is consistent with the predicted result. The quality of screw sleeve is stable, and the productivity and efficiency are significantly improved, meeting the expected standards of the enterprise.

Funds：

作者简介：李蕊（1987-），女，学士，讲师 E-mail：lirui996633@126.com

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