Stability Analysis And Experimental Study Of Ultrasonic Honing Regenerative Chatter System

The ultrasonic honing processing is one of the important component in precision andultra-precision machining technology, but the regenerative chatter in the honing process wasone of the important factors for causing the unstable grinding of the system, and affect ofimproved the parts’machining accuracy and surface quality seriously. The subject was fundedby the project of national natural science, aimed at the regenerative chatter in the ultrasonichoning processing, the stability of the ultrasonic honing chatter system was analyses by meansof combining with theoretical analysis, numerical simulation and experimental to the proof. Itprovides theoretical foundation for theory research of the ultrasonic honing chatter andquesting for suppressing vibration and damping vibration methods, and has important theoryand practical significance.In this paper, the main research contents and results in the following areas:1. On the basis of in described the nonlinear chatter theory research status and theanalysis method of system stability in brief, analyzed the work principle and movementcharacteristics of the power ultrasonic honing vibration. And make certain assumption for thehoning oilstone grinding particle shape and distribution.2. Analysis the stress distribution of single abrasive grain on the static honing oilstone.On this basis, established the dynamical grinding thickness model of honing oilstone, anddeduced the dynamic honing force of a single abrasive, thereby further to deduces thedynamic honing force of ultrasonic honing oilstone. Take the honing oilstone as a researchsubject, established radial and axial single degree freedom dynamics model of powerultrasonic honing regenerative chatter system, and deduced the nonlinear differentialequations. 3. Established two degrees freedom nonlinear dynamic model of the ultrasonic honingchatter system. The relationship between honing speed with the minimum limit honing widthare derived based on the stability equations of the system. Drawing stability lobes diagram ofthe ultrasonic honing vibration system through computer simulation, and the system stabilitywas predicted.4. The influence of parameters of ultrasonic honing vibration system on the stabilitycurve and minimum limit honing width were simulated and analyzed by used of MATLAB7.0software, included the honing force coefficient, natural frequency, stiffness coefficient anddamping ratio in radial and axial and reciprocation motion speed of the honing head. Besides,the line graph of the relationship between every parameters and the minimμm limit honingwidth was to drawn.5. Gained by analyzing modal parameters (natural frequencies, damping ratio) of thehoning head through modal experiment on the power ultrasonic honing head. Experiment wasdone by changing the reciprocating speed of honing head, and the vibration signal of theultrasonic honing system was measured was the same as results by computer simulationroughly, thus verified the rationality of the dynamics model of ultrasonic honing regenerativechatter system.The results of this research revealed the chatter mechanism in ultrasonic honing vibrationsystem, perfected and improved the development of the ultrasonic honing processingmechanism in a certain extent. Laid the foundation for further to restrain and eliminate systemchatter and improve the machining precision and surface quality.