锻压技术

气阀电热镦粗的数值模拟分析

英文标题：Simulation analysis on electric upsetting forming process of exhaust valve

作者：林洪孔凡群

关键词：气阀多场耦合数值模拟温度场

分类号：TG376

出版年,卷(期):页码：2014,39(11):125-129

摘要：

在Marc软件下建立了电热镦粗工艺的电-热-力多场耦合分析模型，实现了对主要工艺控制参数的定量分析。着眼于研究某中等规格气阀锻件的电镦成形过程，并对该气阀的成形过程、温度场、等效应力场、等效塑性应变场、金属流线分布等进行数值模拟，分析了电镦成形的规律与特点。选择数值模拟所得参数进行试验验证，试验得到的“蒜头”形状与模拟得到的“蒜头”具有较高的相似性。这表明所建立的电-热-力多物理场耦合模型能很好地再现实际气阀电热镦粗成形过程，可将此作为一种行之有效的数值模拟方法推广到其他产品的电镦锻工艺中。

The electrical-thermal-mechanical multi-field coupling model for electric upsetting forming process of exhaust valve was established by the Marc software, and the quantitative analysis on main process-controlling parameters was further conducted. The electric upsetting forming process of a medium size exhaust valve was investigated, and the numerical simulations of forming process, temperature field, equivalent stress field, equivalent plastic strain field and metal flowing line distribution of exhaust valve were further carried on. The rule and characteristics of electric upsetting forming process were investigated. Then the numerical simulation parameters were verified by experimental results, and it was found that the experimental “garlic” shape had a high similarity with the simulated one. The conclusion shows that this coupling model can represent the actual forming process of valve electric upsetting very well, and it also can be used for electric upsetting processes of other products as an effective numerical simulation method.

基金项目：

国家科技重大专项(G09003.8-1)；重庆市自然科学基金重点项目（CSTC,2009BA4065）

林洪（1973-），女，学士，讲师

参考文献：

［1］胡亚民,郑恒杰.国内外电热镦粗工艺的发展[J]. 模具技术，1989，(3): 72-80.Hu Y M, Zheng H J. Domestic electrical upsetting process development [J]. Mould Technology, 1989，(3): 72-80.
［2］胡学根.气门的电镦技术[J].内燃机配件，2006，(2): 19-26.Hu X G. Electric upset forging technology of valve [J]. Internal Combustion Engine Parts, 2006, (2): 19-26.
［3］田瑞利.基于机理的BP神经网络在电镦机中加热电流预报模型的研究[D]. 广州: 广东工业大学, 2004.Tian R L. Study of Heating Current Prediction Model in Electric Upsetting BP NN Based on Mechanistic Model [D]. Guangzhou: Guangdong University of Technology, 2004.
［4］邝卫华.气门电镦成形过程的数值模拟与实验研究[D]. 广州:广东工业大学,2002. Kuang W H. Study on Valve Upsetting Process Simulation and Experiment [D]. Guangzhou: Guangdong University of Technology, 2002.
［5］门正兴.电阻连续加热成形电-热-力耦合试验及模拟[D].重庆:重庆大学,2011.Men Z X. Simulation Analysis and Experimental Research of the Forming Process by Continuous Resistance Heating[D]. Chongqing: Chongqing University, 2011.
［6］陈剑，夏巨谌，胡国安，等.基于人工神经网络的气门电镦工艺参数的选择[J].锻压技术，2006，31(5): 36-39.Chen J, Xia J C，Hu G A, et al.Selection of the parameters of electrical upsetting process of valve based on artificial neural networks[J]. Forging & Stamping Technology, 2006, 31(5): 36-39.
［7］方静贤. SNCrW钢晶粒度及碳化物的控制研究[J]. 热处理, 2009,24(3): 58-61.Fang J X. Study on controlling austenitic grain size and carbide in SNCrW steel[J]. Heat Treatment, 2009, 24(3): 58-61.

服务与反馈：

【文章下载】【加入收藏】