基于动态磨削过程仿真的凸轮轴高速磨削稳定性预测分析  

Prediction and analysis of non-circular grinding process stability based on dynamic grinding process simulation

作　　者：刘涛 邓朝晖 姚齐水[1,2] 吕黎曙 余江鸿[1,2] LIU Tao;DENG Zhaohui;YAO Qishui;L Lishu;YU Jianghong(SchoolofMechanicalEngineering,Hunan University of Technology,Zhuzhou 412007,China;Key Laboratory of High-performance rolling bearings in Hunan Province,Hunan University of Technology,Zhuzhou 412007,China;Institute of Manufacturing Engineering,Huaqiao University,Xiamen 361021,China;School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007 [2]湖南工业大学高性能滚动轴承技术湖南省高校重点实验室,湖南株洲412007 [3]华侨大学制造工程研究院,福建厦门361021 [4]湖南科技大学机电工程学院,湖南湘潭411201

出　　处：《振动与冲击》2024年第10期236-247,共12页Journal of Vibration and Shock

基　　金：国家自然科学基金项目资助(52305465,52375428);湖南省教育厅科学研究项目(22B0561)。

摘　　要：磨削颤振是制约凸轮轴高效优质磨削最主要的因素之一。在分析凸轮轴磨削几何运动学特性的基础上,综合考虑时滞效应和砂轮-工件弹性退让机制推导了凸轮轴高速磨削动态磨削力计算方法,建立了多因素耦合的凸轮轴磨削动力学模型和凸轮轴动态磨削仿真模型。基于稳定性叶瓣图法和动态磨削过程仿真方法对凸轮轴高速磨削稳定性进行预测分析;开展试验验证了所提出模型和方法的正确性。最后,通过对动态磨削过程的变模态参数仿真,分析模态参数对凸轮轴高速磨削过程稳定性的影响。结果表明,增大系统刚度和阻尼、减小模态质量都可以改善磨削稳定性,获得更大的稳定磨削极限。Grinding chatter is one of the most important factors of restricting the efficient and high-quality grinding of camshafts.Based on the analysis of the geometric and kinematic characteristics of camshaft grinding,the calculation method for the dynamic grinding force in high-speed grinding of camshafts was deduced considering the time delay effect and the elastic concession mechanism of the grinding wheel-workpiece system comprehensively,and the multi-factor coupling camshaft grinding dynamics model and camshaft dynamic grinding simulation model were established.Based on the stability lobe diagram method and dynamic grinding process simulation method,the high-speed grinding stability of the camshaft was predicted and analyzed.Experiments were carried out to verify the correctness of the proposed models and methods.Finally,the influences of modal parameters on the stability of camshaft high-speed grinding process ware analyzed by simulating the variable modal parameters of dynamic grinding process.The results show that increasing the stiffness and damping of the grinding process system and reducing the modal mass of the grinding process system can improve the grinding stability and obtain a greater stable grinding limit.

关 键 词：非圆轮廓磨削 稳定性预测 磨削颤振 动态磨削仿真 凸轮轴 

分 类 号：TG156[金属学及工艺—热处理]