Research On Polishing Material Removal And Trajectory Optimization Based On Gadget Head

Computer-controlled optical surface forming technology(CCOS)is an important means in optical surface processing.The difference of polishing trajectory affects the result of material removal distribution,and the prediction of polishing removal is predicted in advance,and optimizing the trajectory and polishing parameters according to the results is of great significance to reduce product production time and scrap rate.Computer-controlled optical surface forming technology,based on Hertz contact theory and Preston polishing removal equation to analyze the posture between the spherical gadget head and the work piece.The material removal model of linear polishing is obtained by integral method,and the effect of polishing attitude on polishing removal profile and removal depth is probed.Taking K9 glass as an example,the fixed-point polishing test is designed,the polishing removal coefficient is derived from the experiment,and the accuracy of the polishing removal model is verified.The linear polishing removal experiment under different attitude conditions is designed to verify the effect of attitude on the shape and depth of polish removal.Based on the linear polishing trajectory,the polishing removal conditions of four key positions are summarized.The polishing removal depth model of the key position was established to analyze the reasons for the change of polishing removal depth at each position.The over-polished position in the key position was optimized,and the polishing removal experiment and optimization experiment were designed to verify the accuracy of the model and the feasibility of the optimization method.Based on the single point polishing removal model,the relationship between the single point polishing removal matrix and the complete continuous removal depth model is summarized.Based on the principle of calculus and the superposition of removal depth matrix,a three-dimensional material removal depth simulation method was constructed.The simulation method of removing depth was optimized,and the method of removing depth model with constant arc length and attitude Angle was obtained.A computer-controlled polishing machine was used to carry out experiments.The simulation results were compared with the measured material removal figures in a fixed direction,and the experimental results were close to the simulation results,which verified the accuracy of the model and method.Based on the 3D material removal depth model,the reasons for the uneven polishing phenomenon in the removal depth model were analyzed.The polishing parameters of the polishing trajectory were optimized to build a three-dimensional material removal model after optimization,and the experimental verification was carried out.The feasibility of the optimization was verified by comparing with that before optimization.