工艺参数对楔横轧42CrMo/Q235复合材料层合轴厚径比的影响

借助ANSYS/LS-DYNA软件,建立楔横轧层合轴有限元模型,根据四因素三水平的正交实验进行部分厚径比轧制实验。通过有限元数值模拟,分析工艺参数成形角、展宽角、断面收缩率和轧制温度对厚径比的影响规律。结果表明:轧制实验结果和有限元模拟的结果相符合,有限元模型可以用来预测厚径比。厚径比随着展宽角的增大先迅速下降,后缓慢下降;随着轧制温度的增大先增加,后缓慢增加;随着断面收缩率的增大先缓慢增加,后趋于平缓;随着成形角的增大变化不明显。对厚径比的影响主次为:展宽角、轧制温度、断面收缩率、成形角。研究结果有助于指导层合轴覆材厚度和基材半径尺寸的调控与设计。

Influence of process parameters on thickness-radius ratio of cross-wedge rolling of laminated shaft of 42CrMo/Q235 composites

By using ANSYS/LS-DYNA software,the finite element(FE)model of cross-wedge rolling of laminated shafts was established.Some thickness-radius ratio rolling experiments were carried out under the orthogonal exper-imental designed with four factors and three levels.Through finite element simulation,the effect of process parame-ters including forming angle,spreading angle,area reduction and rolling temperature on thickness-radius ratio were analyzed.The results show that the rolling experimental results accord with the simulation results,which shows that finite element model can be used to predict thickness-radius ratio.With the increase of spreading angle,the thickness-radius ratio sharply decreases first and then slowly decreases.With the increase of temperature,the thick-ness-radius ratio strengthens first and then slowly strengthens.With the increase of area reduction,the thickness-radius ratio slowly strengthens first and then changes little.With the increase of forming angle,the thickness-radius ratio change is not obvious.The influencing sequence on the thickness-radius ratio is spreading angle,rolling tem-perature,area reduction and forming angle in turn.The research results contribute to control and design clad materi-al thickness and matrix material radius size of laminated shaft.