Analysis of an aluminum forging process in completely enclosed dies considering the numerical prediction of thin flash generation in small gaps

Analysis of an aluminum forging process in completely enclosed dies considering the numerical prediction of thin flash generation in small gaps
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考虑小间隙中薄毛刺产生数值预测的全封闭模具铝锻造工艺分析

DOI:
10.1007/s12206-017-0631-y
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发表时间:
2017
影响因子:
1.6
通讯作者:
Behrens
Behrens
中科院分区:
工程技术4区
文献类型:
--
作者:
Richter;Stonis;Behrens

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在汽车工业中,铝锻造零件必须满足轻量化和重型性能要求。在完全封闭的模具中进行无飞边锻造过程中,必须防止在半模之间以及在模具和冲头之间的小间隙中产生薄飞边。然而,薄飞边的形成既不可预测也不可预防。建立了基于有限元分析的铝合金无飞边精密锻造薄飞边生成的数值模型。主要影响输入参数,包括坯料温度,成形速度,和间隙的宽度,对不同的结果参数的意义和影响进行了评估。在所建立的数值模型中,流体静压力和主成形方向上的成形力被确定为最适合预测薄飞边产生的参数。
In the automotive industry, aluminum forged parts must fulfill lightweight and heavy duty performance requirements. The generation of thin flash between die halves and in the small gaps between the die and punch must be prevented during the flashless forging process in completely enclosed dies. However, thin flash formation is neither predictable nor preventable. A numerical model is developed based on finite element analysis to investigate and predict the generation of thin flash in aluminum flashless precision forging processes. The significance and effects of the main influencing input parameters, including billet temperature, forming velocity, and width of gap, on different resulting parameters are evaluated. Among all resulting parameters in the established numerical model, hydrostatic pressure and the forming force in the main forming direction have been identified as the most suitable for predicting thin flash generation.
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