A286高温合金薄壁管件冷镦冲连皮力预测及冲头结构参数优化  

Prediction of cold heading punching force and optimization of punch structure parameters for superalloy A286 thin-walled pipe fittings

作　　者：莫宁宁 冯治国[1,2] 陶亮[1] 江玉莲[1] 王程民 Mo Ningning;Feng Zhiguo;Tao Liang;Jiang Yulian;Wang Chengmin(College of Mechanical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Key Laboratory of Special Equipment and Manufacturing Technology,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州大学贵州省特色装备及制造技术重点实验室,贵州贵阳550025

出　　处：《锻压技术》2023年第9期64-70,共7页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(52165042);贵州科学技术基金重点项目(黔科合基础[2020]1Z049);贵州省优秀青年人才项目(黔科合平台人才[2021]5617号);贵阳市科技人才培养项目(筑科合同[2021]43-1号)。

摘　　要：薄壁管件冲连皮力预测与冲头参数优化是冲连皮加工过程中需要考虑的重要问题,基于DEFORM软件对薄壁管件冲连皮过程进行了数值模拟仿真,利用极差分析了冲头前角A、圆角半径r和冲连皮间隙C对最大冲连皮力Fmax的影响程度;建立了BP神经网络模型,预测了薄壁管件冲连皮过程中的最大冲连皮力,相关系数R达到了0.97608;以冲连皮过程中最大冲连皮力最小为优化目标,利用遗传算法优化了冲头结构参数(冲头前角A、圆角半径r和冲连皮间隙C),得到最优的冲头结构参数为冲头前角A=12.8°、圆角半径r=0.2 mm和冲连皮间隙C=0.12 mm;基于仿真实验,验证了优化的冲头结构参数的准确性,为薄壁管件冲连皮过程的优化和冲头结构参数的选择提供了依据。The prediction of punching force and optimization of punch parameters of thin-walled pipe fittings are important issues to be considered in the punching process.Therefore,the punching process of thin-walled pipe fittings was numerical simulated by software DEFORM,and the influence degrees of front angle A of punch,fllet radius r and punching clearance C on the maximum punching force F_(max) were analyzed by using the range analysis.Then,the BP neural network model was established to predict the maximum punching force in the punching process of thin-walled pipe fttings,and the correlation coefficient R reached 0.97608.Furthermore,minimizing the maximum punching force in the punching process as the optimization objective,the genetic algorithm was used to optimize the punching structural parameters,such as front angle A of punch,fllet radius r and punching clearance C,and the optimum punching structural parameters were obtained that the front angle A of punch was 12.8°,the fllet radius r was 0.2 mm and the punching clearance C was 0.12 mm.Finally,based on the simulation experiments,the optimized punch structural parameters were verified to be accurate,which provides a basis for the optimization on the punching process of thin-walled pipe fittings and the selection of punch structural parameters.

关 键 词：A286高温合金 薄壁管件 冲连皮力 冲头前角 圆角半径 冲连皮间隙 

分 类 号：TG376[金属学及工艺—金属压力加工]