36MnVS4裂解连杆性能分析及轻量化设计

doi:10.13229/j.cnki.jdxbgxb20180816

摘要/Abstract

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。

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

Abstract:

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%.

Key words: materials synthesis and processing technology, connecting rod fracture-splitting, 36MnVS4, reverse reconstruction, fatigue performance, lightweight design

中图分类号:

TG406

石舟,寇淑清. 36MnVS4裂解连杆性能分析及轻量化设计[J]. 吉林大学学报(工学版), 2019, 49(6): 1992-2001.

Zhou SHI,Shu-qing KOU. Performance analysis and lightweight design of 36MnVS4 fracture⁃splitting connecting rod[J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1992-2001.

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