基于频响函数分析的主轴-刀柄-刀具结合面轴向分布参数辨识

发布时间：2019-01-01 19:52

【摘要】：针对主轴-刀柄-刀具结合面轴向分布参数的精确辨识问题,提出了一种基于频响函数分析的主轴-刀柄、刀柄-刀具结合面建模及参数辨识的方法。该方法根据主轴系统中各零部件之间的连接关系,将轴承-主轴结合面简化为集中的弹性支撑,建立主轴-刀柄、刀柄-刀具结合面参数沿主轴轴向呈离散分布的结合面模型,并通过Cuckoo search算法辨识结合面参数,确定其在轴向上的分布情况。以4刃铣刀为例,基于所辨识的结合面参数,在ANSYS中建立主轴系统的动力学模型,计算刀尖点频响函数,并与实测值进行比较。结果表明:主轴-刀柄、刀柄-刀具结合面参数在轴向上呈现非线性分布,由其确定的刀尖点频响函数计算值和实测值之间的相对误差在4%以内,达到了较高的建模精度。
[Abstract]:Aiming at the problem of accurate identification of axial distribution parameters of spindle tool shank and tool joint surface a method of modeling and parameter identification of spindle tool holder tool joint surface based on frequency response function analysis is proposed. According to the connection relation between parts and components in the spindle system, this method simplifies the bearing-spindle joint surface as the concentrated elastic support, and establishes the model of the spindle and cutter shank, the parameters of the cutter shank and tool joint surface distributed discretely along the axial direction of the spindle. The Cuckoo search algorithm is used to identify the parameters of the interface to determine its axial distribution. Taking the 4-edge milling cutter as an example, the dynamic model of the spindle system is established in ANSYS based on the identified parameters of the interface, and the frequency response function of the cutter tip is calculated and compared with the measured value. The results show that the parameters of spindle, tool handle and tool joint face are nonlinear distribution in axial direction, and the relative error between the calculated value of frequency response function and the measured value is less than 4%, and the modeling accuracy is high.
【作者单位】：上海理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(50975179) 上海市教委科研创新项目(11ZZ136) 上海市科委科研计划资助项目(12DZ2252300)
【分类号】：TG54

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