第42卷第5期 Vol. 42No. 5
假压技术
FORGING & STAMPING TECHNOLOGY
QFR-2型钩尾框锻造工艺优化
王凯，贺小毛，蒋鹏，朱岩，唐振英
（1．中国中车齐齐哈尔车辆有限公司，黑龙江齐齐哈尔161002；2．北京机电研究所，北京100083）
2017年5月 May 2017
摘要：QFR-2型钩尾框是一种出口铁路车辆的关键部件，借鉴800t摩擦压力机的生产经验，对QFR-2型钩尾框在500kJ 对击锤生产重新进行工艺分析，并制定了抬高尾部分模面和捷耳一体锻造的优化工艺方案。采用常温拉伸和高温压缩实验，测定了25MnCrNiMoA钢的材料常数和流变应力曲线，并导入Deform-3D软件，对制定的方案进行有限元分析。研究结果表明，优化后的方案更有利于金属的变形，可以减少打击次数，减少7道加工工序，使废品率从12%降低至3%，从而提高了设备使用寿命，降低了生产成本。
关键词：锻造钩尾框；Deform-3D；数值模拟；模锻；流变应力曲线：常温拉伸；高温压缩 DOI: 10. 13330/j. issn. 1000-3940. 2017. 05. 002
中图分类号：TG386
文献标识码：A
文章编号：1000-3940（2017）05-0008-06
Forging process optimization on QFR -2 type of yokes
Wang Kai', He Xiaomao', Jiang Peng', Zhu Yan', Tang Zhenying
(1. Qiqihar Vehicle Co. , Lid. , CRRC, Qiqihar 161002, China; 2. Beijing Research Institute of Mechanical and
Electrical Technology, Beijing 100083, China)
Abstract: The QFR 2 type: of yoke is a key component for export railway vehicles. Therefore, aceording to the production experience of 8000 t friction press, the process of QFR 2 type of yokes produced by 500 kJ impact hammer was re-analyzed, and the optimized process of raising the die face of tail part and forging lugs integrally was proposed. Then, the material parameters and the flow stress curves were obtained by room temperature tensile and hot compression experiments respectively. Furthermore, the Deform 3D sofiware was input, and the proposed process was analyzed by the finite element. The results show that the optimized process is more conducive to metal de-formation. It can reduce the number of blows and seven processing steps so as to decrease the scrap rate from 12% to 3% . Thus, the equipment life can be improved and the cost on production is reduced.
Key words : forging yoke; Deform 3D; numerical simulation; die forging; flow stress cunes; roon temperature tensile; hot eompression
重载、快捷是我国现阶段铁路货物运输的主要
收稿日期：20170110；修订日期：20170302 作者简介：王凯（1973-），男，学士，高级工程师 E-mail: wangkaiqrs@ 126. com
[14][15]
Tamura K, Tajima J. Optimization of open die forging condition and tool design foe ensuring both intemal quality and dimensional precision by three dimensional rigid-plastic finite element analysis
[J]. Ironmaking & Steelmaking, 2003, 30 (5) : 405 411. Banaszek G, Szota P. A comprehensive nt
umerical analysis of the
efect of relative feed during the operation of stretch forging of large ingots in peofiled anvils [J]. Journal of Materials Processing Tech-nology, 2005, 169 (3) ; 437 444
张保利。四砧技长辅具及自动拔长的数学模型研究【D]，秦
[16]
皇岛：燕山大学，2009.
Zhang B L. Study on Four Anvil Reducting Anxiliary Tool and
万方数据
发展方向，这种发展趋势要求铁路车辆的关键零部件具有更高的强度和可靠性，锻造钩尾框可提供更高的安全稳定性和使用寿命，已完全代替了铸造钩尾框，并在铁路货车行业实现了大规模推广[1-3] 为了满足发达国家在产品质量和生产进度上的要求，
Mathematical Model of Automatie Reduction [ D], Qinhuangdao: Yanshan University, 2009.
[17]
栾军.现代试验设计优化方法M]．上海：上海交通大学出版社，1995
Laan J. Modern Experimental Design and Optimization Method[ M]. Shanghai: Shanghai Jiao Tong University Press, 1995.
[18]
余琼，董湘怀，吴云剑，径向压下率与送进率对径向锻造工件质量的影响[J].锻压技术，2015，40（8）：6470.
Yu Q, Dong X H, Wu Y J. Study on the influence of radial reduc tion ratio and feed ratio cn radial forging quality [J]. Forging & Stamping Technology, 2015, 40 (8) : 64 70.