Design and experimental study of CFRP vibration damping boring bar design and vibration damping performance
To improve the vibration damping ability of the boring bar and reduce the use of expensive and difficult-to-process hard alloy materials in damping boring bar,a new type of vibration damping boring bar is designed using Carbon Fiber Reinforced Plastics(CFRP)as the main material.Based on the traditional methods of optimizing the boring bar structure using modal simulation and cutting experiments,a new optimization method is proposed.This method involves deriving the dynamic stiffness expression of the boring bar from its frequency response function.Based on this function,the variation of the independent variable,which is the frequency of the dynamic load applied to the boring bar,is studied through the dynamic stiffness curve.The aim is to find methods that effectively delay the reduction in dynamic stiffness as the independent variable changes.The research findings suggest that increasing the static stiffness of the boring bar and reducing its mass can effectively improve its dynamic stiffness.Based on the research results,the structural design parameters of the CFRP boring bar are optimized.Finally,the cutting experimental results demonstrate compared with carbide boring bars,CFRP boring bars exhibit stronger vibration damping performance with a cutting speed range of 52％.It can maintain its own dynamic stiffness at a relatively stable level when subjected to dynamic loads,thereby providing better vibration absorption capabilities.
vibration damping abilityCFRPcomposite structuredynamic stiffnesscutting test
NETL
NSTL
万方数据
