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。
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 connection relationships among the various parts of spindle system,the bearing-spindle interfaces were simplified as some elastic supports and a discrete distribution model of interfaces among spindleholder-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 measured ones.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 frequency response function and the measured ones are within 4%,which reaches a high prediction precision.
作者
朱坚民
何丹丹
ZHU Jianmin HE Dandan(School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 20009)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2017年第16期1891-1898,共8页
China Mechanical Engineering
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)
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
tool point frequency response function
frequency response function analysis
joint parameters
axial distribution
