Transactions of Materials and Heat Treatment

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ClassificationCode：TG142.1

year,vol(issue):pagenumber：2024,49(2):220-226

Abstract：

In order to improve the problems of long development and design cycle, high cost and reliance on experience for the pre-forging die, according to the similarity principle of material flow and heat transfer, a isothermal surface method for pre-forging die optimal design was proposed. Then, for the diesel engine piston skirt forgings, the pre-forging die design process based on the isothermal surface method was introduced, and the isothermal surfaces of 3, 5, 8 and 10 ℃ were selected for the die design and finite element analysis. Firstly, the isothermal surface was obtained based on the temperature field analysis by software ANSYS WORKBENCH. Then, the point cloud of the isothermal surface was fitted by software Geomagic Studio, and the pre-forging die was designed by software UG. Finally, the cavity filling rate, the maximum forging pressure, the distribution of equivalent strain and the streamline shape were obtained by software DEFORM simulation to evaluate the advantages and disadvantages of different pre-forging schemes. The results show that when the pre-forging die is designed according to the 8 ℃ isothermal surface, the produced forgings have a high filling rate and a low maximum forging pressure, no cracking defects are found by magnetic powder inspection, and the surface quality of

forgings is good, which meets the requirement of production.

Funds：

基金项目:湖北省自然科学基金资助项目（2020CFB374）；材料成形与模具技术国家重点实验室开放基金（P2021-023）；湖北隆中实验室自主创新项目 (2022ZZ-30)；储能与动力电池湖北省重点实验室开放基金（QCCLSZK2021B03，QCCLSZK2021B06）

作者简介：史凯迪（2000-），男，学士

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