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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Sheet Thickness and Punch Roughness on Formability of Sheets in Hydromechanical Deep Drawing
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Effect of Sheet Thickness and Punch Roughness on Formability of Sheets in Hydromechanical Deep Drawing

机译：液压机械深冲中板材厚度和冲孔粗糙度对板材成形性的影响

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摘要

The importance of hydromechanical deep drawing is due to certain advantages over conventional deep drawing such as better formability, reduced number of manufacturing steps, improved surface finish, etc. Due to this, the potential applications of hydromechanical deep drawing have increased in the recent years. In this process, sheet metal parts are formed with the assistance of fluid pressure. The present work addresses the effect of sheet thickness and punch roughness on the formability of interstitial-free steel sheets in hydromechanical deep drawing. Experimental work has been done to study the influence of counter pressure on drawability by varying the sheet thickness and punch roughness. Finite element method has been used to simulate the process, and the results have been found to be in good agreement with the experimental results. It has been found out that the minimum required counter pressure for successful drawing increases with increase in sheet thickness. Drawability of 1.2 mm thick sheet improved with increase in punch roughness. As the punch roughness increases, the minimum required counter pressure decreases because of improved friction holding effect. For the same punch roughness, the minimum required counter pressure increases with increase in draw ratio.
机译：液压机械深冲的重要性是由于相对于传统的深冲具有某些优势，例如更好的可成型性，减少的制造步骤数量，改善的表面光洁度等。因此，近年来，液压机械深冲的潜在应用有所增加。在此过程中，借助流体压力形成钣金零件。本工作解决了薄板厚度和冲头粗糙度对液压机械深冲中无间隙钢板成形性的影响。已经进行了实验工作，以通过改变板厚和冲头粗糙度来研究反压力对可拉伸性的影响。有限元法已被用来模拟该过程，结果与实验结果吻合良好。已经发现，成功拉伸所需的最小反压力随着片材厚度的增加而增加。随着冲头粗糙度的增加，可拉伸性为1.2毫米厚的板材。随着冲头粗糙度的增加，由于改善了摩擦保持效果，所需的最小反压力也降低了。对于相同的冲头粗糙度，最小所需反压力会随着拉伸比的增加而增加。

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