摘要
To study the influence of blank holder type on the drawability of 5182-O aluminum sheet at room temperature, the flat blank holder and curved blank holder were employed during the deep drawing process. The microstructures were characterized by optical microscopy （OM）. The results reveal that the limiting drawing ratio （LDR） of 5182-O aluminum alloy sheet is 1.7 using the flat blank holder. The drawn cup have severe earring. Compared with using flat blank holder, the LDR of 5182-O aluminum alloy sheet is enhanced to 2.0 using curved blank holder. In addition, the earring ratio also reduces and flange wrinkling is prevented when the curved blank holder is used. These are due to a more uniform sheet flow in different directions with curved blank holder.
采用平面和曲面两种压边圈来研究压边圈类型对5182-O铝合金板材室温拉深性能的影响。通过光学显微镜(OM)来研究铝合金板材的显微组织。结果表明:使用平面压边圈的极限拉深比为1.7,而且拉深杯出现了严重的制耳。相比之下,使用曲面压边圈,板材的极限拉深比提高到2.0。曲面压边圈提供的压边力能弱化制耳,阻止板材法兰起皱,这是因为板材在曲面压边圈作用下,在不同方向的流动更均匀。
基金
Project(CDJZR14130009)supported by the Fundamental Research Funds for the Central Universities,China
