Transactions of Materials and Heat Treatment

Title：Research on elastic deformation of fixed dummy block in aluminium profile extrusion

Authors： Zhang Jun Liu Chen Yang Hongjuan Duan Lihua Gao Hongzhang Ding Jianwen

Unit： China National Heavy Machinery Research Institute Co. Ltd. State Key Laboratory of Metal Extrusion and Forging Equipment Technology Geographic Science College Jilin University

KeyWords： aluminium profile metal extrusion fixed dummy block expanding ring elastic deformation FEM numerical simulation

ClassificationCode：TG312

year,vol(issue):pagenumber：2017,42(2):133-138

Abstract：

The function of dummy block in aluminium extrusion was introduced, and the features of different dummy block structures were analyzed. Then, the design principle of dummy block used in aluminium extrusion press was proposed, and the fully elastic deformation condition of expanding ring in dummy block was established based on the force balance condition of dummy block along the extrusion direction. Therefore, the curve of the increased amount of expanding ring in the outer diameter of dummy block vs the extrusion force on dummy block was gained by FEM simulation and theoretical optimization. Furthermore, the structure dimension of dummy block for aluminium extrusion press with large-size was determined. Finally, the experiment was carried out with 125 MN double action extrusion press by hydraulic transmission. The result shows that the fully elastic deformation condition of expanding ring in dummy block can be used as the design basis of dummy block, and the above design method for dummy block and FEM simulation result are reliable, which can improve the lifetime of dummy block.

Funds：

国家科技重大专项(2009ZX04005-031,2011ZX04016-081);陕西省重点科技创新团队(2013KCT-10)

张君(1970-)，男，博士，研究员

Reference：

［1］魏军. 金属挤压机[M]. 北京: 化学工业出版社, 2006.Wei J. Metal Extrusion Press[M]. Beijing: Chemical Industry Press, 2006.
［2］赵云路，邢再兴，薛荣敬，等.国内外固定挤压垫装置评述[J]. 轻合金加工技术，2007, 35(3): 6-15.Zhao Y L, Xing Z X, Xue R J, et al. Review about foreign and domestic fixed dummy block [J]. Light Alloy Fabrication Technology, 2007, 35(3): 6-15.
［3］张宏辉，方永康，周春荣. 固定挤压垫的有效使用[J].轻合金加工技术，2008, 36(2): 19-21.Zhang H H, Fang Y K, Zhou C R. Efficient use of fixed dummy block [J]. Light Alloy Fabrication Technology, 2008, 36(2): 19-21.
［4］Laue K, Stenger H. Extrusion [M]. Ohio: American Society for Metals, 1981.
［5］俞新陆. 液压机现代设计理论[M]. 北京:机械工业出版社, 1993.Yu X L. The Modern Design Theory of Hydraulic Machine [M]. Beijing: China Machine Press, 1993.
［6］徐芝纶. 弹性力学[M]. 北京:人民教育出版社，1979.Xu Z L. Mechanics of Elasticity [M]. Beijing: People's Education Press, 1979.
［7］王祝堂, 田荣璋. 铝合金及其加工手册[M]. 长沙:中南大学出版社, 2007.Wang Z T, Tian R Z. Handbook of Aluminium Alloy and Its Processing [M]. Changsha: Central South University Press, 2007.
［8］张君. 大型铝型材等温挤压技术中的关键问题研究[D]. 西安:西北工业大学,2004.Zhang J.A Study on Key Problems in Isothermal Extrusion Process for Large-size Aluminium Profiles[D]. Xi'an: Doctoral Dissertation of Northwestern Polytechnical University,2004.
［9］闰洪, 包忠诩, 罗忠民, 等. 型材挤压理论研究[J]. 机械工程学报，2000, 36（7）：27-30.Run H, Bao Z X, Luo Z M, et al. The research of profile extrusion theory [J]. Journal of Mechanical Engineering, 2000, 36 (7):27-30.
［10］徐亦公，王祖唐.铝管材连续铸挤过程的计算分析[J].轻合金加工技术, 1994, 22(4): 23-29.Xu Y G, Wang Z T. Analysis of aluminum pipe continuous casting and extrusion process [J]. Light Alloy Fabrication Technology, 1994, 22(4): 23-29.
［11］吴向红, 赵国胜, 孙胜. 挤压速度和摩擦状态对铝型材挤压过程的影响[J]. 塑性工程学报, 2007, 14(1): 36-41.Wu X H, Zhao G S, Sun S. The influence of extrusion speed and frictional status on aluminum profile extrusion processes [J]. Journal of Plasticity Engineering, 2007, 14(1): 36-41.

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