一种新型双层X形管内高压成形加载路径的智能优化方法  

New intelligent optimization method for the loading path of high-pressure formation in a double-layer X-tube

作　　者：冯莹莹[1] 骆宗安[1] 刘照松 吴庆林 FENG Yingying;LUO Zong′an;LIU Zhaosong;WU Qinglin(The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《哈尔滨工程大学学报》2022年第10期1507-1513,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52105322)。

摘　　要：为了提高双层X形管的成形性能,本文针对双层X形管内高压成形过程加载路径的智能优化方法开展研究。将多目标动态优化方法用于双层X形管工艺质量参数的动态调整与优化,通过建立内层管最大减薄率、外层管最大减薄率、极限圆角半径、支管高度4个主要评价因素的柔性可调整区间,协调优化参数,使双层X形管的变形尽可能处于最佳状态。采用线性加权法建立双层X形管工艺质量参数的多因素综合目标函数,并运用遗传算法和BP神经网络控制方法对多目标动态优化函数进行推导求解,优化了学习效率,提高了计算精度,增强了与实际工艺的匹配程度。模拟结果与实验结果的误差在±7%以内,说明此双层X形管在内高压成形过程的加载路径优化控制方法具有较高的精度和可行性。To improve the formability of the double-layer X-tube, an intelligent optimization method for the loading path of the high-pressure forming process in the double-layer X-tube is studied in this paper. The multi-objective dynamic optimization method is applied to the dynamic adjustment and optimization of process quality parameters of the double-layer X-tube. Through the establishment of the flexible adjustable range of four main evaluation factors-namely, the maximum thinning rate of the inner tube, the maximum thinning rate of the outer tube, the ultimate fillet radius, and the height of the branch tube-and through coordination of the process quality parameters, the deformation of the double-layer X-shaped-tube is controlled in the best condition as much as possible. The linear weighted method is used to establish the multi-factor comprehensive, objective function of the process quality parameters of the double-layer X-tube. The genetic algorithm and the backpropagation neural network control method are used to deduce and solve the multi-objective dynamic optimization function, thereby optimizing the learning efficiency, improving the calculation accuracy, and enhancing the matching degree with the actual process. The deviation between the simulation results and the experimental results is within ±7%, which indicates that the optimal control method for the loading path of the double-layer X-shaped tube in the high-pressure forming process has high accuracy and feasibility.

关 键 词：双层X形管 内高压成形 加载路径 线性加权法 多目标动态优化 最大减薄率 极限圆角半径 支管高度 

分 类 号：TG394[金属学及工艺—金属压力加工]