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中文摘要：
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。
英文摘要：
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.
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