Transactions of Materials and Heat Treatment

Title：Forming technology analysis and production trail for thick-walled and long sleeve forgings

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ClassificationCode：TG316

year,vol(issue):pagenumber：2022,47(7):34-41

Abstract：

Due to small inner hole and large flange diameter (small aperture ratio) of the thick-walled and long sleeve forgings and no reaming process involved in conventional forging, it was easy to produce end face concave and eccentric phenomenon in practical production, resulting in not meeting the process requirements of forgings size. Therefore, through the comprehensive analysis on the causes of “concave and eccentric” phenomenon for thick-walled and long sleeve forgings and combined with the drawing control condition of medium-thick-walled and long sleeve forgings in the practical production, the comprehensive control method with “upsetting drawing blanking + spherical billet making + stage deformation control” and the method of eccentricity control and correction were mainly proposed, and the finite element analysis model was established by combining with manufacturability analysis. Furthermore, the influence laws of different aperture ratios on the concavity and the feasibility of step-symmetric depression correction control method were simulated and analyzed emphatically, and the control method for optimal process parameters was determined. Finally, the rationality of process parameters and forming process was verified by batch production trial.

Funds：

国家重点研发计划资助项目（2020YFB2008400）

作者简介：李春辉(1986-)，男，学士，工程师 E-mail：lichunhui258@sohu.com 通信作者：胡振志（1981-），男，硕士，工程师 E-mail：zhenzhi401@163.com

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