Research On Theoretical Modeling And Process For Surface-free Micro-grinding Of Optical Glass

Along with the economic and technological development and the progress of industrial manufacturing capacity,in the industrial production of micro-parts,micro small mechanical device needs more and more products highly integrated miniaturization has become the development trend of the extremely broad prospect of application.Due to its good corrosion resistance,abrasion resistance and good mechanical properties,optical glass are widely used in modern medicine,aerospace and microelectronics.At present,for micro small brittle material micro grinding is one of the most effective processing method,but the hard brittle materials of high strength and high hardness also increases the difficulty of processing,leading to low machining efficiency,high processing cost.In order to effectively improve the efficiency of optical glass processing,shorten the processing cycle,improve the processing quality,this paper through theoretical analysis,numerical simulation and experimental research on the method of grinding parameters(grinding depth,grinding speed and workpiece feed rate)and the hard brittle material removal volume and the relationship between micro grinding force were discussed.(1)Based on single abrasive grain microg-rinding mechanism,and discusses the grinding processing cutting mechanism and the minimum cutting thickness in the model,to establish the grinding processing,material removal volume,removal rate and the micro grinding forces and grinding parameters and material performance between the concrete mathematical expression,the removal rate of material removal volume,and micro grinding parameters on grinding force diagram.(2)Numerical simulation software of ABAQUS is used to establish plane,convex and concave micro grinding numerical simulation model of the workpiece in the simulation of grinding of hard brittle materials under different grinding parameter process,discuss the grinding parameters and grinding hard brittle material removal volume and removal rate and the relationship between micro-grinding force.Numerical simulation results show that increasing the grinding depth and improve workpiece feeding speed can effectively increase the grinding material removal volume and removal rate,but the workpiece feed speed influence on material removal volume is small,with the increase of grinding depth and workpiece feed speed enhancement,also along with the increase of micro-grinding force and force of vibration is more and more big,the processing surface quality becomes poor.Increase the speed of grinding rod,reduce the volume of material removal,reduce the removal rate,and reduce the micro-grinding force,and improve the surface quality of the workpiece after grinding.(3)Optical glass of different shape workpiece micro-grinding experiments,the micro-grinding force in the experimental process of gathering,processing after the surface under the microscope observation,measure the width of material removal.From the analysis of experimental results,obtained with the theoretical analysis and numerical simulation is consistent with the conclusion that to improve the grinding depth,increase the workpiece feed speed is helpful to improve the material removal volume and removal rate,but at the same time the grinding force is bigger,after processing the surface variation.Increase the speed of grinding rod,the material removal and grinding force decrease accordingly.(4)In this paper,numerical simulation and micro-grinding experiments are carried out on different parts of free surface,through the numerical simulation and grinding experiment found that under the same grinding parameters,concave and workpiece material removal volume and removal rate,the largest plane times,minimum convex,material removal at the same time,the greater the micro-grinding force also increased,after the grinding surface quality becomes poor.