Fabrication And Grinding Performance Of A Pressurized Internal-cooling Slotted Grinding Wheel

As a commonly used finishing method,grinding has been widely used in the aviation,aerospace and shipbuilding industries.In the surface grinding process,a large amount of heat is generated in the grinding area,and it is difficult for the coolant to enter the grinding area,which has a serious i MPact on the machining surface integrity,the part machining accuracy,and the service life of the grinding wheel.Therefore,it is of great significance to explore effective and efficient cooling technologies and improve grinding efficiency and surface quality.Based on the internal-cooling,high pressure jet cooling and intermittent grinding,this paper designs and prepares a pressurized internal cooling intermittent grinding wheel.The working area of the grinding wheel was separated and a replaceable abrasive ring was prepared.The inner channel structure was optimized,and the curved flow channel was adopted.In order to further improve the cooling performance,the relative position of the channel outlets and the abrasive tablets was studied in respect of grinding temperature and surface integrity.The main research content is as follows:First,the overall structure of the grinding wheel was designed.By utilizing the finite element simulation software,the inner flow channel structure was optimized.Strength analysis and deformation analysis of the wheel was conducted to ensure the feasibility of the wheel design.Second,using finite element simulation to study the effects of different wheel rotations,different wheel rotation speeds and different coolant pressures,and to study the relationship between wheel rotation,wheel rotation speed,and coolant pressure,provide some basis for grinding experimental research.Thirdly,the numerical simulation of grinding temperature is carried out,and the position of the coolant channel outlets was optimized in respect of the grinding temperature.According to the simulation results,it is concluded that the position of the inner channel outlets should be located in the interval between the abrasive grains to better transfer the generated heat.Finally,the grinding experimental of GH4169 nickel-based superalloy was conducted utilizing the designed pressurized internal cooling slotted grinding wheel.The grinding performance under different outlet positions,inlet pressure and grinding speed was co MPared in respect of the grinding temperature,surface roughness,surface morphology,surface microhardness and surface residual stress.It has been shown that the grinding wheel with channel outlets located in the clearance area has better grinding performance.The grinding temperature was reduced and the surface integrity was improved.