Decrease of Springback by Geometrical Modification of the Sheet Metal Part
Decrease of Springback by Geometrical Modification of the Sheet Metal Part
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通过钣金零件的几何修改减少回弹
DOI：
10.4028/www.scientific.net/amr.1018.277
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
W. Volk
中科院分区：
文献类型：
--
作者：
Annika Weinschenk;W. Volk
随着轻质结构的重要性增加，超高强度钢被使用。它们在移除工具期间引起大量回弹，这必须得到补偿。先前开发的回弹补偿方法[1]有两个缺点。首先，u形型材的回弹不能在一个拉深步骤中得到补偿。其次，这些方法只考虑一批金属板材的材料参数。随着材料属性的变化，出现了问题，因为该工具是专门为一个金属板材批次设计的。因此，这项工作的目的不是补偿回弹，而是通过一种预防措施来减少回弹，这种措施允许通过一个深冲步骤来生产u形型材。该措施包括冲头半径的几何变化并由多个参数定义，其另一个优点是显著降低了板材批量对回弹的影响。这可以通过适当选择这些参数的值来实现。除了这一措施的方法开发，从而可以确定适当的值的参数的基础上的元模型，而不需要单独的模拟。通过示例的方式，该方法应用于u形轮廓，然而其通常可以用于结构部件。
Super high strength steels are used as the importance of lightweight construction increases. They induce a high amount of springback during removal of a tool and this has to be compensated. Previously developed methods of springback compensation [1] have two disadvantages. Firstly springback of a u-shaped profile cannot be compensated in one deep drawing step. Secondly these methods only take the material parameters of one sheet metal batch into account. With varying material properties, problems arise because the tool is especially designed for one sheet metal batch. Therefore the objective of this work is not to compensate springback but to reduce it by a preventive measure which allows the production of a u-shaped profile by one deep drawing step. An additional advantage of the measure, which consists of a geometric change of the punch radii and is defined by several parameters, is that the influence of the sheet metal batch on springback is significantly reduced. This can be realised by a suitable choice of values for these parameters. Apart from this measure a method was developed whereby appropriate values for the parameters can be determined on the basis of a metamodel without the need of individual simulations. By way of example the method is applied to a u-shaped profile, however it can be used for structural components in general.