发动机凸轮轴参数化建模与加工力学分析  

Engine Camshaft Parameter Modeling and Grinding Dynamics Analysis

作　　者：刘勇军[1,2] 董慧敏[1] 赵文俊[1] 

机构地区：[1]鹤壁职业技术学院机电工程学院,鹤壁458030 [2]北京工业大学机械工程与应用电子学院,北京100124

出　　处：《机械科学与技术》2013年第5期739-743,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50775004)资助

摘　　要：针对发动机凸轮轴在数控磨削时产生弹性变形与振动的问题,提出了凸轮轮廓曲线相邻三点逐次样条拟合方法。并利用该方法在ANSYS有限元软件中对某凸轮轴进行了APDL参数化建模,对凸轮轴磨削时不同位置和不同转角下凸轮轴的弹性变形量进行了计算公式推导和有限元分析,对凸轮轴的固有频率和磨削约束条件下的振型、谐响应进行了分析。应用三点拟合方法可以快速、准确地建立凸轮轴的有限元模型,而适当选取磨削参数可以减小凸轮轴的弹性变形与振动,从而提高凸轮轴的轮廓精度和升程精度。To fitting method ametric design lyzed with the reduce the elastic deformation and vibration of a camshaft while grinding, the adjacent 3-dot gradual for its contour curve is put forward; the camshaft＇s 3D model is established by using the ANSYS par- language （APDL）. The deformation at different positions and different angles is deduced and ana- finite element method. The natural frequency, the vibration mode and the harmonic response of the camshaft while grinding is analyzed. The grinding parameter selection principle, through which the deformation of the camshaft may be reduced, is proposed. The with the 3-dot gradual fitting method; the elastic rameters are selected appropriately; the precision camshaft＇s 3D model can be established quickly and accurately deformation and vibration can be reduced when the grinding pa- and lift precision of the camshaft contour can be enhanced.

关 键 词：凸轮轴 APDL 磨削 有限元分析 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]