基于HyperXtrude软件,研究了6063铝合金空心型材挤压过程中不同方向上的金属流速及焊合室内的压力分布,分析了型材产生尺寸超差的原因,并提出了增加阻流块优化模具的方法.有限元模拟结果表明:增加阻流块后,金属在不同方向上的流速发生了变化,尤其是向型材中部流动的速度明显降低,因此可以解决型材尺寸超差的问题；将解决方法用于实际挤压型材后发现,增加阻流块确实能改善金属流速的均匀性,能生产出合格的型材.
参考文献
| [1] | 董菲菲,周佳,刘志文,王冠,李落星.AM80镁合金板材热挤压工艺的数值模拟[J].机械工程材料,2012(10):77-80,85. |
| [2] | 林启权,李应明,王振球.2519铝合金管材热挤压过程的数值模拟[J].机械工程材料,2007(12):79-82,4. |
| [3] | 刘祖岩,许玮,王尔德.AZ31镁合金在不同温度场挤压中的数值模拟[J].机械工程材料,2006(10):77-79,87. |
| [4] | J. Lof;Y. Blokhuis .FEM simulations of the extrusion of complex thin-walled aluminium sections[J].Journal of Materials Processing Technology,2002(2/3):344-354. |
| [5] | J. Zhou;L. Li;J. Duszczyk .Computer simulated and experimentally verified isothermal extrusion of 7075 aluminium through continuous ram speed variation[J].Journal of Materials Processing Technology,2004(2):203-212. |
| [6] | 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. |
| [7] | L. Li;J. Zhou;J. Duszczyk .Prediction of temperature evolution during the extrusion of 7075 aluminium alloy at various ram speeds by means of 3D FEM simulation[J].Journal of Materials Processing Technology,2004(3):360-370. |
| [8] | 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. |
| [9] | G. Liu;J. Zhou;J. Duszczyk .Prediction and verification of temperature evolution as a function of ram speed during the extrusion of AZ31 alloy into a rectangular section[J].Journal of Materials Processing Technology,2007(1/3):191-199. |
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