基于RSM与NSGA-Ⅱ的法兰件挤压成形工艺的多目标优化  

Multi-objective optimization of extrusion forming for flange based on RSM and NSGA-Ⅱ

作　　者：赵江波 龚红英[1] 叶恒昌 张志强 尤晋 刘尚保 ZHAO Jiang-bo;GONG Hong-ying;YE Heng-chang;ZHANG Zhi-qiang;YOU Jin;LIU Shang-bao(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《塑性工程学报》2023年第3期9-14,共6页Journal of Plasticity Engineering

基　　金：上海工程技术大学产学合作项目((17)CL-003)。

摘　　要：通过分析实心法兰的结构特点,运用有限元模拟与响应曲面算法和NSGA-Ⅱ相结合的算法对实心法兰冷挤压成形进行了多目标优化分析。采用DEFORM-3D有限元模拟软件对实心法兰成形过程中的损伤与载荷进行了分析。选取摩擦因数、凹模圆角半径和挤压速度3个工艺参数为影响因素,损伤值与载荷力为优化目标,通过设计响应曲面试验进行仿真模拟。结合NSGA-Ⅱ遗传算法进行多目标优化,对优化解进行仿真试验对比,目标值误差位于合理范围内。工艺参数优化的最终结果为:挤压速度1.46 mm·s^(-1)、摩擦因数0.05、凹模圆角半径8.00 mm,采用优化后的参数进行模拟试验,结果表明,法兰的最大成形载荷由100 kN降低为50.9 kN,损伤值由1.29减小至0.70,工件的成形质量得到改善。By analyzing the structural characteristics of solid flange,the multi-objective optimization analysis of cold extrusion forming of solid flange was carried out using finite element simulation and the combination of response surface algorithm and NSGA-Ⅱalgorithm.DEFORM-3D finite element simulation software was used to analyze the damage and load of solid flange forming process.Three process parameters of friction factor,the radius of concave die fillet and extrusion speed were selected as the influencing factors,and damage value and load force were selected as the optimization objectives.Simulation was carried out by designing response surface test.Combined with genetic algorithm NSGA-Ⅱ,the multi-objective optimization was carried out,and the optimization solutions were simulated and compared.The error of target value is within a reasonable range.The final results of process parameter optimization are the extrusion speed of 1.46 mm·s^(-1),the friction factor of 0.05,and the radius of concave die fillet of 8.00 mm.The simulation test with the optimized parameters was carried out.The results show that the maximum forming load of flange is reduced from 100 kN to 50.9 kN,the damage value is reduced from 1.29 to 0.70,and the forming quality of workpiece is improved.

关 键 词：法兰 DEFORM-3D 响应面法 NSGA-Ⅱ 

分 类 号：TG386.1[金属学及工艺—金属压力加工]