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Approaches for springback reduction when forming ultra high-strength sheet metals

机译:形成超高强度板金属时回弹减少方法

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Nowadays, the automotive industry is challenged constantly by increasing environmental regulations and the continuous enhancement of standards with regard to passenger's safety (NCAP, Part 1). In order to fulfil the aforementioned requirements, the use of ultra high-strength steels in research and industrial applications is of high interest. When forming such materials, the main problem results from the large amount of springback which occurs after the release of the part. This paper shows the applicability of several approaches for the reduction of springback amount by forming of one hat channel shaped component. A novel approach for springack reduction which is based on forming with an alternating blank draw-in is presented as well. In this investigation an ultra high-strength steel of the grade DP 980 was used. The part's measurements were taken at significant cross-sections in order to provide a qualitative comparison between the reference geometry and the part's released shape. The obtained results were analysed and used in order to quantify the success of particular approaches for springback reduction. When taking a curved hat channel shaped component as an example, the results achieved in the investigations showed that it is possible to reduce part shape deviations significantly when using DP 980 as workpiece material.
机译:如今,汽车工业通过增加环境法规和乘客安全(NCAP,第1部分)的持续加强标准而不断挑战。为了满足上述要求,在研究和工业应用中使用超高强度钢的使用具有很高的兴趣。当形成这样的材料时,主要问题是由释放部分之后发生的大量回弹。本文通过形成一个帽通道形部件,若干方法对几种方法的适用性降低了回弹量。还提出了一种基于具有交替坯料抽取的Smillack减少的新方法。在该研究中,使用了DP 980的超高强度钢。部分的测量结果是在重要的横截面上拍摄,以便在参考几何形状和部分释放的形状之间提供定性比较。分析并使用得到的结果,以量化应对回弹的特定方法的成功。当以弯曲的帽通道形状为例时,在研究中实现的结果表明,当使用DP 980作为工件材料时,可以显着降低部分形状偏差。

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