锻压技术

径向压下率与送进率对径向锻造工件质量的影响

英文标题：Influences of radial reduction ratio and feed ratio on radial forging quality

作者：余琼董湘怀吴云剑

单位：上海交通大学

分类号：TG156

出版年,卷(期):页码：2015,40(8):64-70

摘要：

An axisymmetric finite element model to simulate the radial forging process was established and verified, the dimensionless parameters were adopted, and the influences of radial reduction ratio and feed ratio on the stress and strain distribution, the end surface shape and forging force were analyzed. Based on the criteria of uniform equivalent strain distribution, without concave profile in end surface, three dimensional compressive stress during forging in the center and without residual tensile stress after forging, reasonable combination of the radial reduction ratio and feed ratio were determined. Finally， an example about selecting radial forging process parameters, considering forgings quality, productivity and capacity of the forging equipment was presented. The forging quality can be improved effectively by the radial forging forming rule obtained by the research.

采用有限元法建立并验证了径向锻造成形轴类锻件的轴对称数值模型，对工艺参数进行无量纲化，分析了压下率与送进率等参数对径向锻造成形中应力及应变分布、端面形状和锤头打击力的影响。基于心部等效应变均匀分布、端面不出现凹坑以及在锻造过程中心部出现三向压应力且锻后不出现残余拉应力等准则，建立了压下率与送进率的合理配合区域，给出了利用以上规律,兼顾锻件质量、生产率、锻造设备最大吨位等要求,合理选择压下率与送进率参数的径向锻造工艺设计示例。采用本研究得出的径向锻造成形规律可以有效地提高锻件质量。

基金项目：

国家自然科学基金资助项目(51275297)

余琼（1988-），女，硕士研究生董湘怀（1955-），男，博士，教授

参考文献：

［1］Wallner S, Harrer O, Buchmayr B, et al. Manufacturing of precision forgings by radial forging[A].International Conference on Advances in Materials and Processing Technologies (AMPT2010) [C]. Paris, 2010.
［2］董节功,周旭东,朱锦洪,等.径向锻造三维成形锻透性的数值模拟[J].机械工程材料,2007, 31(3): 76-78.Dong J G, Zhou X D, Zhu J H, et al. FEM simulation of forging penetration efficiency of radial forging in 3D [J].Materials for Mechanical Engineering, 2007,31(3):76-78.
［3］栾谦聪, 董湘怀, 吴云剑. 基于经验法则的锻透深度计算公式推导与验证[J]. 模具技术, 2013 ,(3): 1-6.Luan Q C, Dong X H, Wu Y J. The derivation and validation of a formula calculating the forging penetration efficiency (FPE) based on empirical method [J]. Die & Mould Technology，2013,(3): 1-6.
［4］米奕媛, 刘建生, 田继红, 等. 大型筒形件轧制过程中的锻透研究[J]. 锻压技术, 2014, 39(11): 43-46.Mi Y Y, Liu J S, Tian J H, et al. Forging permeability research on large cylinder part in the rolling process [J]. Forging & Stamping Technology, 2014,39(11)：43-46.
［5］周旭东, 刘香茹. 台阶轴径向锻造锤头数对锻透性和生产率的影响[J]. 锻压技术, 2011, 36(4): 26-29.Zhou X D, Liu X R. Effects of radial forging die number on forging penetration efficiency and production rate of stepped shaft[J]. Forging & Stamping Technology, 2011,36(4)：26-29.
［6］樊黎霞,刘力力,刘庆东, 等.身管线膛精锻加工过程的数值分析[J].兵工学报, 2009,30(8):1098-1102. Fan L X, Liu L L, Liu Q D, et al. The numerical simulation of the precision radial forging processing of the gun barrel [J]. Acta Armamentarii, 2009,30(8):1098-1102.
［7］刘力力, 樊黎霞, 徐诚. 身管冷径向锻造残余应力的模拟研究[J]. 兵工学报, 2012, 33(11): 1291-1297.Liu L L, Fan L X, Xu C. Simulation study on residual stress in cold radial forged barrel [J]. Acta Armamentarii, 2012, 33(11): 1291-1297.
［8］董节功, 周旭东, 高全德, 等. 实心锤头径向锻造压应力分析[J]. 河南科技大学学报: 自然科学版, 2007, 28(3): 4-7.Dong J G, Zhou X D, Gao Q D, et al. Compressive stress analysis of radial forging with solid hammers[J]. Journal of Henan University of Science and Technology: Natural Science Edition, 2007,28(3): 4-7.
［9］秦敏,李继光,房娃,等.空心车轴径向锻造工艺的模拟研究[J].太原科技大学学报, 2008,29(5):373-376.Qin M, Li J G, Fang W, et al. Simulation and research of hollow-axle during the precise forging [J]. Journal of Taiyuan University of Science and Technology, 2008,29(5):373-376.
［10］卫建军,刘建生.径向锻造锤头结构对车轴成形的影响分析[J].太原科技大学学报, 2008,29(4): 313-316.Wei J J, Liu J S. Numerical simulation of flow field and temperature field for billets continuous casting at low super heat by two rollers cooling [J]. Journal of Taiyuan University of Science and Technology, 2008, 29(4): 313-316.
［11］Uhlig A. Investigation of the Motions and the Forces in Radial Swaging [D]. German： Technical University Hannover, 1964.

服务与反馈：

【文章下载】【加入收藏】