Transactions of Materials and Heat Treatment

Title：Multi-directional die forging process of valve body forgings with flanges on both horizontal sides

Authors： Zhao Wencheng1 2 Jin Qinglin1 Zhang Lei2 3 4 Liu Chuan1 3

Unit： 1.Faculty of Materials Science and Engineering Kunming University of Science and Technology 2.Tianjin Research Institute for Advanced Equipment Tsinghua University 3.School of Mechanical Engineering Tsinghua University 4.State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Tsinghua University

KeyWords： valve body forgings flange horizontal punch extrusion upsetting

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2025,50(3):89-94

Abstract：

When the valve body forgings with flanges on both horizontal sides were produced using multi-directional die forging process, it was difficult to fill the flanges on both sides of the forgings, and the pass rate of the forgings was relatively low. Through the simulation analysis on the forming process of the forgings, it was found that when the flanges on both sides of the forgings were formed by the extrusion of horizontal punch, the metal first flowed towards the center of die cavity. After the flow resistance of metal towards the center of die increased, it flowed towards the die cavity of flange. The metal flowing to the die cavity of flange had a long contact time, the metal temperature dropped, and the metal flow resistance increased, resulting in the difficulty of flange filling on both sides of the forgings. In view of this problem, the upsetting process scheme of the flanges on both sides of the forgings by the horizontal punch was proposed. The metal flow resistance was reduced, the metal fluidity was improved, and the flanges on both sides of the valve body forgings were fully filled. The batch production results of valve body forgings show that the upsetting process scheme for the flanges on both sides of the forgings by the horizontal punch is feasible, the production of the forgings is stable and reliable, and the qualified rate of the forgings is high.

Funds：

作者简介：赵文成（1984-），男，硕士，高级工程师 E-mail：zhaowc@tsinghua-tj.org 通信作者：金青林（1971-），男，博士，教授 E-mail：jinqinglin@kust.edu.cn

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