锻压技术

连铸大圆坯V形四砧径向锻造应力应变分析

英文标题：Analysis on strain and stress of V-shaped four-anvil radial forging for continuous casting round billet

作者：曹杰魏贤明李康汪开忠

分类号：TG316.2

出版年,卷(期):页码：2019,44(4):10-15

摘要：

为明确连铸大圆坯V形四砧径向锻造金属变形的特点，采用有限元分析软件Simufact模拟了四砧径向锻造过程，着重分析了锻件的变形渗透问题和心部轴向应力、平均应力的分布情况。四砧径向锻造锻件表层金属变形量较大，心部金属变形量较小，最小等效应变位于离端部一定距离的中心位置。锻造过程中，变形区心部的轴向应力为拉应力状态，心部轴向应力最大值随压下量的增加变化较小，在给定模拟条件下，锻件中心最大轴向拉应力为22 MPa。锻件在变形区的平均应力为负，变形区的应力状态为静水压力。锻件心部的静水压力明显小于表层，且随锻压压下量的增加，心部的静水压力增加，在给定模拟条件下，锻件中心最大静水压力为49 MPa。

In order to determine the deformation characteristics of V-shaped four-anvil radial forging for continuous casting round billet, the four-anvil radial forging process was simulated by finite element analysis software Simufact, and the deformation penetration problem and the distribution of axial stress and mean stress in the center of forgings were mainly analyzed. However, the surface metal deformation of forgings is large, and the deformation in the center is small, furthermore the minimum equivalent strain is in the center of a certain distance from the end. In the forging process, the axial stress in the center of deformation zone is tensile stress, and the maximum axial stress in the center changes slightly with the increasing of forging reduction. Under the given simulation condition, the maximum axial tensile stress in the center is 22 MPa, the mean stress in the deformation zone is negative, therefore, the stress state in the deformation zone is hydrostatic pressure. Furthermore, the hydrostatic pressure in the center of forgings is obviously smaller than that in the surface layer, and it increases with the increasing of forging reduction. Under the given simulation condition, the maximum hydrostatic pressure in the center of forgings is 49 MPa.

基金项目：

安徽省科技攻关计划项目（1501021003）；安徽省教育厅自然科学研究项目（KJ2013A061）

作者简介：曹杰（1971-），男，博士，副教授 E-mail：caojie910@ahut.edu.cn

参考文献：

[1] 魏贤明，曹杰，汪开忠. 轴类件拔长V型砧和四砧径向锻造锻透性研究[J] . 锻压技术，2017，42（4）：21-26.

Wei X M，Cao J，Wang K Z. Research on forging penetration efficiency in the process of V-shaped anvil stretching and four-anvil radial forging for long-axis workpiece [J] . Forging & Stamping Technology, 2017, 42(4):21-26.

[2] 赵俊伟，陈学文，史宇麟，等. 大型锻件锻造工艺及缺陷控制技术的研究现状及发展趋势[J] . 锻压装备与制造技术，2009，44（4）：23-28.

Zhao J W, Chen X W, Shi Y L, et al. The current stage and development trend of forging technology and defect control for heavy forging[J] . China Metalforming Equipment & Manufacturing Technology, 2009, 44(4):23-28.

[3] 栗玉杰，安红萍，云晖，等. 大型轴类锻件新型凸面砧拔长研究[J] . 太原科技大学学报，2013，34（6）：429-434.

Li Y J, An H P, Yun H, et al. The design of a new convex anvil in blank making process on heavy shaft forgings[J] . Journal of Taiyuan University of Science and Technology, 2013, 34(6):429-434.

[4] 任运来，聂绍珉，牛龙江，等. 大型锻件锻造拔长新工艺[J] . 机械工程学报，2007，43（11）：224-228.

Ren Y L, Nie S M, Niu L J, et al. New drawing technics of large forges[J] . Journal of Mechanical Engineering, 2007, 43(11):224-228.

[5] 赵玲玲，杜凤山，黄华贵，等. 大锻件锻造拔长砧型[J] . 塑性工程学报，2009，16（6）：28-32.

Zhao L L, Du F S, Huang H G, et al. Research on shape anvils for drawing in free hot forging[J] . Journal of Plasticity Engineering, 2009, 16(6):28-32.

[6] Fan L X, Wang Z G, Wang H. 3D finite element modeling and analysis of radial forging processes[J] . Journal of Manufacturing Processes, 2014, 16(2):329-334.

[7] Ghaei A, Movahhedy M R, Taheri A K. Finite element modelling simulation of radial forging of tubes without mandrel[J] . Materials and Design, 2008, 29(4):867-872.

[8] 李艳萍. 车轴径向锻造过程浅析[J] . 大型铸锻件，2008，(4)：16-18.

Li Y P. Brief analysis on longitudinal forging process for axle[J] . Heavy Casting and Forging, 2008, (4):16-18.

[9] 栾谦聪，董湘怀，吴云剑. 径向锻造工艺参数对锻透性的影响[J] . 中国机械工程，2014，25（22）：3098-3103.

Luan Q C, Dong X H, Wu Y J. Effects of process parameters on FPE in radial forging processes[J] . China Mechanical Engineering, 2014, 25(22):3098-3103.

[10] 牛立群，张琦，解明，等. 基于FORGE-3D径向锻造工艺的数值模拟[J] . 锻压技术，2017，42（2）：167-171.

Niu L Q, Zhang Q, Xie M, et al. Numerical simulation of radial forging process based on FORGE-3D[J] . Forging & Stamping Technology, 2017, 42(2):167-171.

[11] Zhou X D, Liu X R, Xing J B. Forging penetration efficiency of steel H13 stepped shaft radial forging with GFM forging machine[J] . Journal of Shanghai Jiao Tong University (Science), 2012, 17(3):315-318.

[12] 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.

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