Study on Cross-sectional Deformation of H-typed Rotary Draw Bending of H96 Brass Double-ridged Rectangular Tube with Different Ridge Groove Filler Materials

摘要

H-typed rotary draw bending of H96 double-ridged rectangular tube bears a complex stress-strain state with the multi-dies nonlinear constraints, which inevitably leads to cross-sectional deformation, especially the part of ridge groove of tube.However, filling material in ridge groove can effectively reduce the deformation of this part.Thus, different ridge groove filler materials which possess a certain strength and stiffness, H96 bass and 3A21 aluminum alloy, are selected.Based on ABAQUS/Explicit, a three-dimensional finite element model of H-typed rotary draw bending of H96 brass double-ridged rectangular tube with different ridge groove filler materials was established.The results show that : (1) The height deformation of ridge groove, spacing deformation of ridge groove, the width deformation of tube and the height deformation of tub are significantly reduced no matter whether the filler material is H96 bass or 3A21 aluminum alloy.(2) Both the height deformation of ridge groove and spacing deformation of ridge groove when filler material is 3A21 aluminum alloy are less than those when filler material is H96 bass.The height deformation of tube when filler material is 3A21 alumintun alloy is less than that when filler material is H96bass, but the width deformation of tube is similar.