Experimental Study On Dressing Of Cast Iron Bonded Forming Grinding Wheel And Machining Of V-groove Mould

Molding of optical element is an effective replication technology which has advantages of low cost,high efficiency and high accuracy;therefore,the molding of optical elements with micro array structure has been developed,and the quality of mold plays an important role in deciding the optical properties of elements.In this paper,in order to obtain high quality optical molds,EDM and grinding are determined to machine V-groove mold with material carbide,and the main research works are following:(1)First,a cast iron bonded diamond forming grinding wheel used for machining V-groove mold is designed.According to the characteristics of the cast iron bonded forming wheel,electrical discharge dressing method is selected for dressing the forming wheel.Then the electrode and dressing platform are designed.The dressing effect of the grinding wheel is detected by grinding the graphite block.Finally,the rotation accuracy,the arc radius,the contour angle and the surface topography of the grinding wheel were examined(2)The rough machining of carbide V-groove mold is carried out by EDM.The experiment is designed and set up.The relative wear rate of electrode,the surface quality and the profile angle of V-groove are experimentally investigated,and the effect of numbers of machined grooves on surface quality and the profile angle of V-groove are analyzed.(3)The forming grinding method is used to finish V-groove mold by using the cast iron bonded diamond forming wheel after EDM dressing;design of experiment and grinding experiment of V-groove mold was carried out.The effect of grinding parameters on grinding force,the surface topography of the V-groove and the wear of wheel are analyzed.