锻压技术

内六方空心件挤压成形金属流动规律研究

英文标题：Study on the law of metal flow for hexagon hollow pieces in extrusion forming process

作者：李泽勇张宝红于建民王宏伟杜九汪

单位：中北大学

分类号：TG376

出版年,卷(期):页码：2014,39(3):132-136

摘要：

挤压成形带有内六方通孔零件的难点是孔的尺寸精度高、金属流动复杂。为了提高内六方空心件形状和尺寸精度，借助商业有限元软件Deform-3D，应用刚塑性有限元法模拟了内六方空心零件的冷挤压成形过程，利用速度矢量研究了该零件冷挤压过程的金属流动规律；根据模拟得到的速度场和变形规律，预测了成形过程中的缺陷；利用数值模拟对原始坯料进行优化，通过把坯料底部改成30°的内锥形，解决了挤压件前端不规则及内孔尺寸超差的缺陷。最后，通过实验的方法得到了内六方通孔挤压件，与模拟结果基本一致，其力学性能、组织和尺寸精度均符合要求。

The difficult problem of extrusion forming for hexagon hollow pieces is the dimensional accuracy of hexagon hole and complicated law of metal flow. In order to improve the shape and dimension precision for hexagon hollow pieces, the cold forming process for hexagon hollow pieces was numerical simulated by using finite element software Deform-3D and rigid-plastic finite element method, and the law of metal flow in forming process was studied by using velocity vector. According to the simulated velocity and metal flow law, the forming process defects were predicted. The original billet was optimized by using numerical simulation, and the bottom of billet was changed into inner cone of 30°, so the questions of irregular front end of extrusion work pieces and out of tolerance of inner-hole dimension were sloved. Finally,the experiments were conducted to verify the simulation results, and the parts with qualified mechanical property，structure and dimension were obtained.

基金项目：

参考文献：

［1］张治民.温热成形技术在车辆零件制造中的应用[M].北京：兵器工业出版社，1997.Zhang Zhimin. Warm-hot Forming Technology Used in Vehicle Parts Anufacturing[M].Beijing: Weapon Industry Press,1997.
［2］田福祥.精密锻造空心件的锻模设计新方案[J].青岛建筑工程学院学报，1990,11（1）:73-79.Tian Fuxiang.The design of new programs for precision forging die in forging hollow parts[J].The Journal of Qingdao Institute of Architectural Engineering,1990,11(1):73-79.
［3］赵升吨，冯国明，刘华.空心铝铆钉冷挤压工艺及模具的研究[J].锻压技术，1999,24(4):1-7.Zhao Shengdun,Feng Guomin,Liu Hua. Study of hollow aluminum rivets cold extrusion process and die design[J].Forging & Stamping Technology,1999,24(4):1-7.
［4］洪慎章.冷挤压实用技术[M].北京：机械工业出版社，2005.Hong Shenzhang. Practical Technology for Cold Extrusion[M].Beijing: China Machine Press,2005.
［5］张祖贤，邢定安，汪熹，等.兵器黑色金属材料手册[M].北京：兵器工业出版社，1995.Zhang Zuxian,Xing Dingan,Wang Xi,et al. Handbook of weapon ferrous metal materials[M]. Beijing: Weapon Industry Press,1995.
［6］Feng Li, Jun Fenglin, Guan Nanchu. Metal flow in the precision forging of aluminum alloys[J].Aluminum: Shaping and Forming,2009,61(8):57-60.
［7］董湘怀.材料成形计算机模拟[M].北京：机械工业出版社，2005.Dong Xianghuai.Computer Simulation of Material Forming[M]. Beijing: China Machine Press,2005.
［8］尹冠人.中碳钢调质后冷挤压成形性能实验研究[D].上海：上海交通大学，2009.Yin Guanren.Experimental Research on Cold Extrusion Deformation Performance of Medium Carbon Steel after Quenching and Tempering[D].Shanghai: Shanghai Jiao Tong University,2009.
［9］Hu Chengliang, Zhao Zhen,Yin Guanren. Cold extrusion deformation behavior of medium carbon steel after quenching and tempering[J].Transactions of Nonferrous Metals Society of China,2009,19:552-557.

［10］郭成，赵静远，庄达，等.平面应变复合挤压金属变形流动规律研究[J].金属科学与工艺，1982，1（1）:95-100.Guo Cheng,Zhao Jingyuan,Zhuang Da,et al. Study on the flow law of metal deformation of composite extrusion plane strain[J]. Metal Science and Technology,1982,1(1):95-100.
［11］龚小涛，杨帆，郭红星.复杂异形环件毛坯优化设计方法研究[J].锻压技术，2012,37（2）:75-78.Gong Xiaotao,Yang Fan,Guo Hongxing.Optimal design methed study on complicated profile ring[J]. Forging & Stamping Technology, 2012,37（2）:75-78.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】