采用斜面冲头和斜端面橡胶为介质,非线性显式动力分析软件ANSYS/LS-DYNA为数值模拟平台,建立三通管复合胀形的有限元模型,并研究斜面冲头、普通冲头、斜端面橡胶棒及垂直端面橡胶棒对三通管件成形质量的影响.结果表明:随着轴向斜冲头斜度增加,管件壁厚减薄率是先减小后增大,增厚率逐渐减小;随着橡胶斜度的增加,三通管件支管高度是先增加后减小.因此,当冲头斜度α=10°时,三通管的成形质量最佳;当冲头斜面和橡胶斜面同为8°时,壁厚减薄率控制在11%,则成形支管高度最高为16.37 mm.
RAY P,MACDONALD B J.Experimental study and finite element analysis of simple X- and T-branch tube hydroforming processes[J].International Journal of Mechanical Sciences, 2005,47(10):1498-1518.
[6]
CRAPPS J, MARI E B, HORSTEMEYER M F. Internal state variable plasticity-damage modeling of the copper tee-shaped tube hydroforming processes[J].International of Material Processing Technology,2010,210(13):1726-1737.
