36MnVS4裂解连杆性能分析及轻量化设计  

Performance analysis and lightweight design of 36MnVS4 fracture-splitting connecting rod

作　　者：石舟 寇淑清[1,2] SHI Zhou;KOU Shu-qing(College of Materials Science and Engineering,Jilin University,Changchun 130022,China;Rolling Forging Institute,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]吉林大学辊锻工艺研究所,长春130022

出　　处：《吉林大学学报（工学版）》2019年第6期1992-2001,共10页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目（2016YFD0701102）;国家科技重大专项项目（2013ZX04002021）

摘　　要：为实现连杆轻量化以适应发动机低能耗低振动的要求,对36MnVS4连杆进行了结构改进设计。在原有C70S6连杆结构设计的基础上,改用高强钢36MnVS4,并分别对C70S6和36MnVS4连杆断裂接合面进行三维逆向重构,建立了裂解连杆有效分析模型。通过有限元模拟对连杆进行疲劳强度分析,得到:36MnVS4连杆较C70S6连杆的疲劳寿命和安全系数有明显提高,具有足够的安全储备进行轻量化改进。以连杆强度和刚度为约束条件,对36MnVS4连杆分部位进行结构改进设计,改进后连杆质量降低21%,实现了裂解连杆的轻量化。Compared with the first-generation of fracture-splitting material C70S6,the tensile and yield strengths of the new material 36MnVS4 are significantly improved.In order to reduce the weight of the connecting rod to meet the requirements of the engine′s low energy consumption and low vibration,the structure of the 36MnVS4 connecting rod is improved.Based on the design of the original C70S6 connecting rod structure,the high-strength steel 36MnVS4 is used instead.Three-dimensional inverse reconstruction of fracture surface of C70S6 and 36MnVS4 connecting rods are conducted,and an effective analysis model of connecting rods is established.The fatigue strength analysis by finite element simulation shows that the fatigue life and safety factor of the 36MnVS4 connecting rod are significantly higher than that of C70S6 connecting rod,and there is sufficient safety reserve for lightweight improvement.With the constraints of connecting rod strength and stiffness,the structural design of the 36MnVS4 connecting rod is improved that the mass of the connecting rod is reduced by 21%.

关 键 词：材料合成与加工工艺 连杆裂解 36MnVS4 逆向重构 疲劳性能 轻量化设计 

分 类 号：TG406[金属学及工艺—焊接]