Study On Gas-Liquid-Solid Three-phase Abrasive Flow Finishing Process Optimization And Its Control System

In modern optical applications,electronic information and other high-tech fields,a large number of large planar precision optical components and functional crystal materials often require ultra-smooth surface finish.Due to the high technological requirements,it is still lack of an efficient,clean,high-yield process automation solutions.For large flat workpieces status of ultra-precision machining,gas-liquid-solid three-phase abrasive flow finishing method was proposed.By using the energy released by the bubble collapsing to accelerate the motions of abrasive particles,the finishing efficiency was improved.Based on this method the process conducted in-depth research,the main work is as follows:(1)In a large flat surface precision machining manufacturing problems as the background,at home and abroad have been working method of carrying out a detailed investigation,pointed out the advantages and disadvantages of the fluid processing method.Binding of the flow path of liquid-solid two phase flow finishing method and the bubble collapse theory,it introduced gas-liquid-solid three-phase abrasive flow finishing method principle,structure and process parameters.(2)Analysis of gas-liquid-solid abrasive flow machining process temperature light finishing the negative impact of an adaptive change inlet velocity of new technology.Based on pre-fluid finishing research results,the establishment of relevant mathematical models,different temperatures corresponding to the optimum inlet velocity value of a control system based on speed obtained by numerical analysis.(3)In order to accurately control the flow rate,designed and optimized fuzzy PID control system.By the algorithm based control system simulation shows that it has good performance,and finally verify the optimal curve speed control system has a high degree of fit of the output flow rate compared to the theoretical temperature in the experimental results.(4)On the basis of theoretical research,gas-liquid-solid three-phase abrasive flow finishing have had a systematic experiments.Obtained by experimental data: Not compared to the introduction of micro-nano bubble processing efficiency is improved by about twice;increasing the processing speed control system,the contrast contour without processing speed control system,the same conditions,the maximum workpiece height Ry significantly reduced,improving the surface quality.