采用Deform-3D有限元软件,结合基于逆向工程的焊合面网格修复技术,建立方形管分流模双孔挤压时包括焊合过程在内的全过程的三维有限元数值模拟方法,分析分流孔的配置方案对金属流动行为、挤压力、挤压温度及成形质量的影响.结果表明:中间分流孔与位于两侧分流孔的面积比值Q1/Q2是影响金属流动均匀性、焊缝位置和制品平直度的重要因素,比值Q1/Q2为0.93～1.03时,挤出的方管平直度好;分流孔外接圆直径和挤压筒直径的比值对挤压过程中温升的影响较小,而对挤压力有一定的影响,当该比值为0.82时挤压力最小,该比值超过0.82时挤压力明显增加.
参考文献
| [1] | MURAKAMI S .Adoption of aluminum extrusion and its technology[J].Journal of the Japan Society for Technology of Plasticity,2008,49(567):25-30. |
| [2] | 谢建新;刘静安.金属挤压理论与技术[M].北京:冶金工业出版社,2001 |
| [3] | XIE J X;MURAKAMI T;IKEDA K .Experimental simulation of metal flow in porthole-die extrusion[J].Journal of Materials Processing Technology,1995,49(1/2):1-11. |
| [4] | Chanda T;Kowalski L;Duszczyk J;Zhou J .3D FEM simulation of the thermal events during AA6061 aluminum extrusion[J].Scripta materialia,1999(2):195-202. |
| [5] | YANG D Y;PARK K;KANG Y S .Integrated finite element simulation for the hot extrusion of complicated Al alloy profile[J].Journal of Materials Processing Technology,2001,111(1/3):25-30. |
| [6] | H.H. Jo;S.K. Lee;C.S. Jung .A non-steady state FE analysis of Al tubes hot extrusion by a porthole die[J].Journal of Materials Processing Technology,2006(2):223-231. |
| [7] | D.Y. Yang;K. J.Kim .Design of processes and products through simulation of three-dimensional extrusion[J].Journal of Materials Processing Technology,2007(1/3):2-6. |
| [8] | 程磊,谢水生,黄国杰,吴朋越,和优锋.分流组合模挤压过程的有限元分步模拟[J].系统仿真学报,2008(24):6603-6606,6612. |
| [9] | 邸利青,张士宏.分流组合模挤压过程数值模拟及模具优化设计[J].塑性工程学报,2009(02):123-127,143. |
| [10] | JUNG M L;BYUNG M K;CHUNG G K .Effects of chamber shapes of porthole die on elastic deformation and extrusion process in condenser tube extrusion[J].Materials & Design,2005,26(04):327-336. |
| [11] | L. Li;H. Zhang;J. Zhou;J. Duszczyk;G.Y. Li;Z.H. Zhong .Numerical and experimental study on the extrusion through a porthole die to produce a hollow magnesium profile with longitudinal weld seams[J].Materials & design,2008(6):1190-1198. |
| [12] | JO H H;LEE S K;LEE S B .Prediction of welding pressure in the non-steady state porthole die extrusion of Al7003 tubes[J].International Journal of Machine Tools and Manufacture,2002,42(06):753-759. |
| [13] | L. Donati;L. Tomesani .The prediction of seam welds quality in aluminum extrusion[J].Journal of Materials Processing Technology,2004(0):366-373. |
| [14] | 谢建新;黄东男;李静媛;张志豪 .一种空心型材分流模挤压焊合过程数值模拟技术[P].CN101604350A,2009-12-16. |
| [15] | G. Liu;J. Zhou;J. Duszczyk .FE analysis of metal flow and weld seam formation in a porthole die during the extrusion of a magnesium alloy into a square tube and the effect of ram speed on weld strength[J].Journal of Materials Processing Technology,2008(1-3):185-198. |
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