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

摘要/Abstract

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。

关键词: 刀尖点频响函数, 频响函数分析, 结合面参数, 轴向分布

Abstract: In allusion to identify the joint parameters for axial distribution interfaces among spindle-holder-tool accurately, a method of surface modeling and parameter identification of spindle-holder and holder-tool was proposed based on frequency response function analysis. According to the connectionrelationships among the various parts of spindle system, the bearing-spindle interfaces were simplifiedas some elastic supports and a discrete distribution model of interfaces among spindle-holder-tool was built on axial, and the corresponding contact parameters were identified through Cuckoo search algorithm, so as to explore their distributions. A four fluted milling cutter was used as an example,a spindle system's dynamics model was established in ANSYS based on parameters identified,and the calculated tool point frequency response function in ANSYS was compared with the measuredones. Experimental results show a non-linear distribution of joint parameters for interfaces among spindle-holder-tool on axial, and the relative errors between the calculated tool point frequencyresponse function and the measured ones are within 4%, which reaches a high prediction precision.

Key words: tool point frequency response function, frequency response function analysis, joint parameters, axial distribution

中图分类号:

TH113

朱坚民;何丹丹. 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[J]. 中国机械工程.

ZHU Jianmin;HE Dandan. Identification of Axial Distribution Joint Parameters of Interfaces among Spindle-Holder-Tool Based on Frequency Response Function Analysis[J]. China Mechanical Engineering.

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