基于田口方法与灰色关联分析的连杆热锻模具等效应力与磨损  

Equivalent stress and wear of connecting rod hot forging die based on Taguchi method and grey correlation analysis

作　　者：邓伟[1] 王卓安 贾德文[1] 杜俊韦 许传恒 Deng Wei;Wang Zhuo′an;Jia Dewen;Du Junwei;Xu Chuanheng(Yunnan Key Laboratory of Internal Combustion Engines,Kunming University of Science and Technology,Kunming 650500,China;Chongqing Pengshi Technology Development Co.,Ltd.,Chongqing 401320,China)

机构地区：[1]昆明理工大学云南省内燃机重点试验室,云南昆明650500 [2]重庆彭氏科技开发有限公司,重庆401320

出　　处：《锻压技术》2024年第11期135-143,共9页Forging & Stamping Technology

基　　金：云南省科技厅重大科技专项计划(202202AC080006)

摘　　要：以某H13钢连杆模具为研究对象,基于田口方法与灰色关联分析,采用有限元模拟研究发动机连杆锻造过程中,锻造温度、模具预热温度、摩擦因数、模具硬度和锻压速度这5个工艺参数对模具的磨损深度及等效应力的影响规律,基于田口设计方法设计25组正交试验,并基于灰色关联分析法进行多目标关联性分析。结果表明,优化的工艺参数组合为:锻压速度为550 mm·s^(-1)、锻造温度为1200℃、模具预热温度为225℃、摩擦因数为0.30、模具硬度为56 HRC。与初始工艺相比,最优工艺参数组合下的磨损深度改善了28.3%、等效应力改善了9.1%。最后,通过实际生产验证,主要磨损部位及应力集中区域状况与现场生产情况基本一致,验证了优化模型的可行性。For H13 steel connecting rod die,based on Taguchi method and grey correlation analysis,the influence laws of five process parameters,namely,forging temperature,die preheating temperature,friction factor,die hardness and forging speed,on the wear depth and equivalent stress of die during the forging process of engine connecting rod were studied by finite element simulation.Then,twenty-five sets of orthogonal test were designed based on Taguchi design method,and the multi-objective correlation analysis was conducted based on grey correlation analysis method.The results indicate that the optimized process parameters are the forging speed of 550 mm·s^(-1),the forging temperature of 1200℃,the die preheating temperature of 225℃,the friction factor of 0.30 and the die hardness of 56 HRC.Compared with the initial process,the wear depth and equivalent stress under the optimal process parameter combination are improved by 28.3%and 9.1%,respectively.Finally,through the actual production verification,the conditions of main wear positions and stress concentration areas are basically in line with the actual production conditions,which verifies the feasibility of the optimization model.

关 键 词：连杆 热锻模具 磨损深度 等效应力 正交试验 灰色关联分析 

分 类 号：TG76[金属学及工艺—刀具与模具]