锻压技术

基于柔性送料的高频旋锻数值模拟

英文标题：Numerical simulation on high frequency rotary forging based on flexible feeding

作者：刘志卫胡圳威陈向阳胡海霞

分类号：TG316

出版年,卷(期):页码：2022,47(12):1-6

摘要：

在高频旋锻过程中，由于送料机构的持续进给，在锻模闭合时其喇叭口会阻挡工件的送入，导致出现材料逆送料方向流动并呈现逆流量大于顺流量的现象，这种现象使得进给力和锻打力增加，从而导致锻模寿命降低和成形质量下降。针对该问题，以烧结态铜管旋锻过程为研究对象，提出了基于柔性送料方式的高频旋锻方法，并采用有限元方法研究了送料方式及柔性送料弹性系数对旋锻成形工艺的影响。结果表明：柔性送料方式不但能够解决材料逆流带来的问题，提高管件的成形质量和成形效率，还能够降低进给力与成形力，提高锻模寿命；对于柔性送料的高频旋锻成形，在一定范围内，随着弹簧弹性系数的增加，管件纵向厚度分布变化不大，周向厚度分布趋于均匀。

In the process of high-frequency rotary forging, due to the continuous feeding of feeding mechanism, the bell mouth of forging die will block the feeding of workpiece when the forging die is closed, resulting in the phenomenon that the material flows against the feeding direction and the counter flow is greater than the forward flow, which makes the feeding force and forging force increase and leads to the reduction of forging die life and forming quality. Therefore, for the rotary forging process of sintered copper tube, a high-frequency rotary forging method based on the flexible feeding mode was proposed, and the influences of feeding method and elastic coefficient of flexible feeding on the rotary forging process were studied by the finite element method. The results show that the flexible feeding mode can not only solve the problems caused by the counter flow of materials, and improve the forming quality and forming efficiency of pipe fittings, but also reduce the feeding force and forming force, and improve the life of forging die. Thus, within a certain range, for the high-frequency rotary forging of flexible feeding, with the increasing of spring elastic coefficient, the longitudinal thickness distribution of pipe fittings does not change much, and the circumferential thickness distribution tends to be uniform.

基金项目：

安徽省高校自然科学基金重点项目（KJ2019A0127）

刘志卫（1986-），男,博士,讲师 E-mail：lzwlws@163.com

参考文献：

[1]卢险峰, 褚亮. 弹壳形状零件缩口力描述模型研究[J]. 塑性工程学报, 2004，11(6):43-46.

Lu X F, Chu L. Research on the description model of necking force of cartridge case shaped parts [J]. Journal of Plasticity Engineering, 2004,11 (6): 43-46.

[2]陈举聪. 微小型薄壁铜管旋锻缩径工艺研究及成形质量分析[D]. 广州：华南理工大学, 2013.

Chen J C. Research on Diameter Reduction Process and Forming Quality Analysis of Micro Thin-walled Copper Tube by Rotary Forging [D]. Guangzhou: South China University of Technology, 2013.

[3]Ghaei Abbas,Movahhedy Mohammad R. Die design for the radial forging process using 3D FEM[J]. Journal of Materials Processing Tech., 2006,182(1)：534-539.

[4]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. Effect of radial forging process parameters on forging permeability [J]. China Mechanical Engineering, 2014, 25 (22): 3098-3103.

[5]Rong L, Nie Z R,Zuo T Y. FEA modeling of effect of axial feeding velocity on strain field of rotary swaging process of pure magnesium[J]. Transactions of Nonferrous Metals Society of China, 2006,16(5):1015-1020.

[6]Rong L, Nie Z R, Zuo T Y. 3D finite element modeling of cogging-down rotary swaging of pure magnesium square billet—Revealing the effect of high-frequency pulse stroking[J]. Materials Science & Engineering A, 2007,464(1): 28-37.

[7]周昆凤, 周志明, 涂坚, 等. 基于Forge的汽车空心EPS转向轴旋锻成形数值模拟及工艺优化[J]. 热加工工艺, 2020,49(19):83-86.

Zhou K F, Zhou Z M, Tu J, et al. Numerical simulation and process optimization of rotary forging of automotive hollow EPS steering shaft based on Forge [J]. Hot Working Technology, 2020,49 (19): 83-86.

[8]余琼. 压下率与送进率对径向锻造锻件质量影响的研究[D]. 上海:上海交通大学, 2015.

Yu Q. Study on the Influence of Reduction Rate and Feeding Rate on the Quality of Radial Forging [D]. Shanghai: Shanghai Jiao Tong University, 2015.

[9]王旭, 李勇, 韩皓阳, 等. 薄壁铜管旋转模压法缩径成形质量实验与仿真研究[J]. 锻压技术, 2021,46(5):72-78.

Wang X, Li Y, Han H Y, et al. Experimental and simulation study on the quality of thin-walled copper tube reduction by rotary die pressing[J]. Forging & Stamping Technology, 2021,46 (5): 72-78.

[10]Svetlana Ortmann-Ishkina, Dhia Charni, Marius Herrmann, et al. Development of residual stresses by infeed rotary swaging of steel tubes[J]. Archive of Applied Mechanics, 2021,91:3637-3647.

[11]周大隽. 金属体积冷成形技术与实例[M]. 北京:机械工业出版社,2009.

Zhou D J. Metal Bulk Cold Forming Technology and Examples [M]. Beijing: China Machine Press, 2009.

[12]周秉华. 冷态旋转锻造[J]. 机械科学与技术, 1984,(1):29-37,113.

Zhou B H. Cold rotary forging [J]. Mechanical Science and Technology for Aerospace Engineering,1984, (1): 29-37,113.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】