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Formability Enhancement of Galvanized IF-Steel TWB by Modification of Forming Parameters

机译:修改成形参数可增强镀锌IF钢TWB的可成形性

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摘要

Tailor-welded blanks (TWBs) have numerous advantages over traditional blanks used in manufacturing, such as energy conservation and environment protection. Low formability and weld line movement during forming operation are main limitations of these blanks. In this research, the effects of forming parameters including thickness ratio (TR), rolling direction with respect to the weld line and direction of major stress with respect to the weld line, on formability and weld line movement of TWBs made of galvanized Interstitial-Free (IF) steel were investigated experimentally. Also the effect of application of non-uniform blankholder force on weld line movement was studied by FEM simulation. By utilization of ABAQUS software, blankholders with different geometries, namely one-piece and two-pieces were modeled and forming process was simulated. The results revealed that formability maximized when the major stress and rolling direction were along the weld line. The results showed applying different blankholder forces, by application of the two-pieces blankholder, leads to more uniform strain distribution and correspondingly less weld line movement in TWBs with TR greater than 1. It was also concluded that the effect of geometric discontinuities on reducing formability was greater than the effect of the weld region.
机译:定制焊接毛坯(TWB)与制造中使用的传统毛坯相比具有许多优势,例如节能和环保。这些毛坯的主要局限性是成型加工过程中的低成型性和焊缝移动。在这项研究中,成形参数包括厚度比(TR),相对于焊接线的轧制方向和相对于焊接线的主应力方向对镀锌无间隙板制成的TWB的可成型性和焊接线运动的影响(IF)钢进行了实验研究。还通过有限元模拟研究了施加不均匀的压边力对焊缝运动的影响。通过使用ABAQUS软件,对具有不同几何形状的毛坯夹持器(即一件式和两件式)进行建模,并模拟了成形过程。结果表明,当主应力和轧制方向沿焊接线时,可成形性最大化。结果表明,通过使用两件式毛坯夹持器,施加不同的毛坯夹持力会导致TR大于1的TWB的应变分布更加均匀,并且焊缝移动也相应减少。还得出结论,几何不连续性对降低可成形性的影响大于焊接区域的影响。

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