TRB管结构参数对弯曲成形的影响及优化  

Influence of TRB tube structural parameters on bending forming and optimization

作　　者：张渝[1] 张遥 郭耀璘 张德军 ZHANG Yu;ZHANG Yao;GUO Yao-lin;ZHANG De-jun(School of Mechanotronics&Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《塑性工程学报》2020年第5期142-148,共7页Journal of Plasticity Engineering

基　　金：重庆市科委自然科学基金计划资助项目(cstc2012jjA70001)。

摘　　要：建立了TRB管无芯弯曲有限元模型,研究了薄区壁厚、过渡区厚度差和过渡区长度对TRB管弯曲成形质量的影响。增大薄区壁厚、降低过渡区长度和减小过渡区厚度差有助于提高管弯曲成形质量,但对于壁厚增厚率影响效果不明显。为了提高TRB管弯曲成形质量,建立了弯曲质量评价指标与结构参数之间的近似模型并进行了精度验证,进而对结构参数进行优化。结果表明:优化解与仿真模拟解的相对误差小于4%,说明结论是可靠的;与初始值相比,TRB弯曲管件最大壁厚减薄率下降了0.369%,最大壁厚增厚率减小了0.313%,最大短轴变化率降低了1.852%,弯曲成形质量得到提高,说明优化方法具有良好的工程实用性。The no-mandrel bending finite element model of TRB tube was established. The effects of wall thickness of thin zone,thickness difference and length of transition zone on bending forming quality of TRB tube were studied. Increasing wall thickness of thin zone,decreasing length and thickness difference of transition zone contribute to improve the bending forming quality,but the effect on thickening rate of wall thickness is not obvious. To improve the bending forming quality of TRB tube,an approximate model between quality evaluation index and structural parameters of bending was established and the accuracy was verified. Then,the structural parameters were optimized. The results show that the relative error between the optimization and simulation solution is less than 4%,indicating that the wall thickness conclusion is reliable. Compared with the initial value,the maximum wall thickness reduction rate decreases by 0. 369%,the maximum thickening rate decreases by 0. 313%,the maximum short-axis change rate decreases by 1. 852%,and the bending forming quality is improved,which indicates that the optimization method has good engineering practicability.

关 键 词：TRB管 无芯弯曲成形 近似模型 多目标优化 

分 类 号：TG386.31[金属学及工艺—金属压力加工]