基于刚柔耦合的PCB钻床下钻机构的振动分析与研究  

Vibration Analysis and Research of PCB Drilling down Mechanism Based on Rigid Flexible Coupling

作　　者：张冬冬 韩雪 ZHANG Dongdong;HAN Xue(Engineering Training Center,Nanjing Forestry University,Nanjing Jiangsu 210037,China;School of Civil Engineering,Wanjiang Institute of Technology,Ma anshan Anhui 243031,China)

机构地区：[1]南京林业大学工程培训中心,江苏南京210037 [2]皖江工学院土木工程学院,安徽马鞍山243031

出　　处：《机床与液压》2024年第6期7-12,18,共7页Machine Tool & Hydraulics

摘　　要：通过对PCB数控钻床下钻机构的钻孔误差进行分析,找出影响多层PCB板加工精度的主要原因,并对主轴系统下钻过程中的刚柔耦合动力学特性进行研究。充分考虑调心联轴器中的柔性调心轴和其他刚性构件的耦合,利用哈密尔顿原理和模态分析法建立下钻机构主轴系统的动力学方程。通过仿真求解得到了下钻机构钻孔过程中的电主轴部分的动态响应。结果表明:下钻机构主轴系统的安装误差、调心轴的刚度和支撑电主轴的空气轴承的阻尼对钻孔的偏心误差以及钻孔时的柔性振动有一定的影响。Through the analysis of the drilling error of the PCB numerical control drilling down mechanism,the main reasons affecting the processing accuracy of multilayer PCB boards were found out,and the rigid flexible coupling dynamic characteristics during the spindle system s drilling process were studied.The coupling between the flexible self-centering spindle in the self-aligning coupling and other rigid components were fully considered,and the dynamic equation of the spindle system of the drilling down mechanism was established using Hamilton s principle and modal analysis method.The dynamic response of the electric spindle during the drilling process of the drilling down mechanism was obtained through simulation.The results show that the installation error of the main spindle system of the drilling mechanism,the stiffness of the centering shaft,and the damping of the air bearing supporting the electric spindle have a certain impact on the eccentricity error of the drilling and the flexible vibration during drilling.

关 键 词：刚柔耦合 调心联轴器 调心轴 空气轴承 

分 类 号：TG527[金属学及工艺—金属切削加工及机床]