锻压技术

T2/20双金属复合管的弯曲变形规律及参数优化

英文标题：Bending deformation rules and parameters optimization on T2/20 bimetal clad tube

作者：张洋王天宝孙洁刘丽娟蔡若璠马坤

分类号：TG386

出版年,卷(期):页码：2022,47(10):176-185

摘要：

双金属复合管由于基覆管材料的力学性能差异较大，使其在弯曲过程中的变形机理较单管更加复杂，其壁厚减薄和截面畸变等缺陷的变化规律也较单管有所不同。为了揭示双金属复合管的弯曲变形机理，获得质量较好的双金属复合弯管，通过有限元模拟研究了T2/20双金属复合管弯曲成形过程中成形参数对壁厚减薄和截面畸变的影响，在此基础上基于响应面法分析了成形参数间交互作用的显著性，并对成形参数进行优化，获得了最优成形参数组合。结果表明：相较于其他成形参数，相对弯曲速度大于1.0后，壁厚和截面不会发生明显变化；相对弯曲速度与相对弯曲半径间的交互作用对壁厚减薄、截面畸变的影响较其他因素的交互作用更加显著；最优成形参数组合为e=5.66 mm，μm=0.05，μp=0.30，Vp=1.05，R/D=2.41。

Due to the great difference in mechanical properties of base and clad tubes, the deformation mechanism of bimetal clad tube is more complex than that of single tube in bending process, and the change rules of defects such as wall thickness thinning and section distortion are also different from those of single tube. Therefore, in order to reveal the bending deformation mechanism of bimetal clad tube and obtain better quality of bimetal clad bending tube, the influences of forming parameters on wall thickness thinning and section distortion of T2/20 bimetal clad tube during the bending process were studied by finite element simulation. Then, on this basis, the significance of interaction between forming parameters was analyzed based on response surface method, and the forming parameters were optimized to obtain the optimal combination of forming parameters. The results show that compared with other forming parameters, when the relative bending speed is greater than 1.0, the wall thickness and section do not change obviously, and the interaction between relative bending speed and relative bending radius has more significant influence on wall thickness thinning and section distortion than other factors. Thus, the optimum combination of forming parameters is e=5.66 mm，μm=0.05，μp=0.30，Vp=1.05，R/D=2.41。

基金项目：

张洋（1996-），男，硕士，助理工程师，E-mail：zycestbon@163.com

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