The wall thickness of the tube will be increased with increasing back pressure or increasing frictioncoefficient.
管材弯曲内外侧壁厚随着反推压力的增大或摩擦系数的增大而增大。
2
In addition, this paper presents how the diameter reducing rate, the die semicone angle, the frictioncoefficient and the original wall thickness influence the buckling and the axial elongation rate.