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首页> 外文期刊>Journal of Mechanical Science and Technology >Numerical and experimental investigation of central cavity formation in aluminum during forward extrusion process
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Numerical and experimental investigation of central cavity formation in aluminum during forward extrusion process

机译：前挤压过程中铝中心腔形成的数值和实验研究

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摘要

In the presented paper central cavity formation during the forward extrusion of commercially pure aluminum was investigated. For this purpose finite element analysis was utilized for simulation of this defect. The experimental tests were carried out on commercially pure aluminum. A good agreement between finite element simulations and experimental tests verified the adaptability of finite element simulations with the real process conditions. Taguchi method was performed for classifying the simulations regarding to consider synergistic parameters. The parameters include reduction of area, friction coefficient and die angle. Critical thickness, the representative waste material, was presented as a new criterion for optimizing the parametric study. By utilizing the Analyze Taguchi design, critical thickness was optimized and the effect of each parameter was recognized for different levels. In addition, the best levels with the minimum waste material were gained in which friction coefficient, die angle and reduction of area were 0.2, 5A degrees and 20%, respectively. Also the amount of waste material was forecasted by just about 2% errors without FEA by Taguchi method.
机译：在本文中，研究了正向挤压商业纯铝过程中的中心腔形成。为此目的，有限元分析被用于模拟该缺陷。实验测试是在商业纯铝上进行的。有限元模拟和实验测试之间的良好一致性证明了有限元模拟在实际工艺条件下的适应性。使用Taguchi方法对模拟进行分类以考虑协同参数。这些参数包括面积减小，摩擦系数和模具角度。临界厚度，即代表性的废料，被提出作为优化参数研究的新标准。通过使用Analyze Taguchi设计，对临界厚度进行了优化，并针对不同级别识别了每个参数的影响。另外，以最少的废料获得了最佳含量，其中摩擦系数，模角和面积减小分别为0.2％，5A度和20％。另外，通过田口方法，在没有FEA的情况下，仅约2％的误差就能预测出废料的数量。

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