Design And Experimental Study Of Diamond Wire Saw Vibration Control System

With the vigorous development of the chip industry and the photovoltaic industry,diamond wire saw cutting technology has been widely used in the field of chip and solar panel slice processing.The surface quality of the slice greatly affects the utilization rate of materials and the quality of subsequent processing,so how to improve the surface quality of the chip is one of the urgent problems that need to be solved in the chip industry and photovoltaic industry.The results show that the vibration of the wire saw directly affects the surface quality of the slice,so this thesis first establishes the wire saw vibration model,studies the vibration law of the wire saw through theory and experiment,and proposes the wire saw vibration control method on this basis,and designs the diamond wire saw vibration control system to control the wire saw vibration to improve the surface quality of the slice.The main work content of this thesis is as follows,1.Mathematical modeling and analysis of wire saw vibration.Firstly,according to the influence relationship between wire saw tension,guide wheel center distance and vibration,a mathematical model of diamond wire saw vibration is established,and then Ansys Workbench simulation is carried out,and the analysis model is concluded to verify the influence relationship between wire saw tension,guide wheel center distance and vibration.Finally,experiments are carried out to verify the conclusions.2.Optimize control strategies.Firstly,the wire saw tension controller is mathematically modeled,a control strategy is proposed,and a constant tension control algorithm based on fuzzy PID is designed.Secondly,the tension control system based on PID algorithm and fuzzy PID algorithm is built in Matlab/simulink,respectively.The simulation results show that the fuzzy PID control system has better control effect than the PID control system.3.Build a control system workbench.First,complete the controller selection and connect and debug the hardware system;Secondly,the motor control program and wire saw tension acquisition program are designed in the PLC;Third,the KEPServer OPC data relay interface is developed to transmit digital analog signals;Finally,an OPC control system based on fuzzy PID algorithm is built in Matlab/simulink to realize data interaction and establish a constant tension control system.Through comparative experiments,compared with the PID tension constant control system,the control performance of the fuzzy PID tension constant control system is improved by 50%.4.Wire saw vibration control experiment.Firstly,single-factor experiments on wire saw line speed,workpiece feed speed,guide wheel center distance and wire saw tension target value are carried out to explore the influence of different process parameters on wire saw vibration.Then,experiments are carried out on the influence of different wire saw vibration on slice quality,and the experimental results show that there is a certain influence relationship between the vibration frequency and amplitude of the wire saw,and the two can directly affect the surface quality of the slice.Finally,the four-factor three-level orthogonal experiment is designed to obtain the optimal vibration parameters,and it can be found that the surface topography of the slices obtained by the optimal vibration parameters is better than the surface morphology obtained by the non-optimal parameters,and the surface roughness of the slices obtained based on the optimal vibration frequency parameters and the optimal amplitude parameters is reduced by 66% and 70.9%,respectively.The experimental results show that the surface quality of the slice can be improved by controlling the vibration of the wire saw.