Simulation And Analysis Of Single Abrasive Grain Grinding Deep Groove

The narrow and deep groove structure are widely applied in variable pump and turbine blade,which is generally made of hard cutting materials,when using a plated CBN griding wheel for narrow and deep groove griding,grinding workpiece surface prone to thermal burns,big grinding force,grinding wheel blockage problem,how to solve these problems properly in narrow deep groove and to improve the surface quality of the workpiece,has become the focus of current research,as the main grinding machining tool,abrasive grinding wheel surface distribution is quite different,the distribution of particles of narrow deep groove machining quality of workpiece surface produce important effect,reasonable distribution is helpful to improve the processing effect of narrow deep groove the workpiece,therefore,It is of great significance to study the influence of abrasive grains on the grinding process.The shape of the abrasive grains,the distance of distribution,the angle of rotation and other factors are different.In this paper,the effects of factors such as abrasive grain arrangement and shape change on the grinding performance are analyzed by simulation method.Using Deform-3D Software to do the simulation,mainly to do the following aspects of the work.(1)The theoretical analysis of the grinding process is carried out from the aspects of the summary of the abrasive grains,the calculation of the contact arc length,the establishment of the theoretical model of the grinding force,the analysis of the grinding heat,the wear of the abrasive grains,Which laid a theoretical foundation for the follow-up simulation research.(2)Based on the analysis of the shape of the abrasive grains,the pyramid shaped and polyhedral abrasive particles with larger rotation effect were selected as the research object,Deform-3D software was used to simulate the change law of grinding heat,grinding force and chip shape,Through the simulation study on the rotation angle of a single abrasive particle:The flow of the chip and the highest temperature in the grinding process are the best when the angle of the abrasive particles of pyramid shape reaches 45 degrees,The flow effect of the chip and the highest temperature in the grinding are the best when the abrasive particle of the polyhedron is 90 degrees?(3)The circular conical abrasive particles and pyramid shaped abrasive particles are used as the model of abrasive grains,Deform-3D software was used to analyze the influence of the change of the radius of the blunt circle and the value of the apex angle on the grinding heat,the grinding force and the chip shape,At the same time,the paper also makes a comparative analysis of the shape and the grinding force of the pyramid shaped abrasive grains and the conical abrasive grains with blunt circular shape,The conclusion can be drawn by simulation:With the increase of the radius of grinding force is also increasing.The change trend of temperature decreases first and then increases,with the increase of angle grinding force increases,the grinding temperature increases first and then decreases,pyramid shaped abrasive cutting flow than with blunt conical difference,grinding force some large fluctuations?(4)The velocity of the abrasive grains,the depth of the workpiece,the moving speed of the workpiece,etc.,will have an important effect on the quality of the workpiece surface.During the simulation,a small piece of workpiece is selected as the workpiece model.Deform-3D software is used to simulate the single grain grinding,The influence of the velocity of abrasive grains and the depth of abrasive cutting on the maximum temperature,grinding force and chip morphology of the OCr18Ni9 austenitic stainless steel was studied.The results show : as the abrasive grain velocity increases,The maximum temperature in the grinding is increasing and the grinding force is increasing.With the increase of the cutting depth,the maximum temperature fluctuates within a certain range,and the grinding force is increasing.Through the analysis of the influence of grinding angle,blunt circle radius,cutting depth and cutting speed on grinding temperature,chip shape and grinding force,it can be found that when using CBN grinding wheel to do deep groove grinding,The existence of grinding heat burns,which is easy to plug the grinding wheel,grinding force and other issues ‘s causes of problems,the relevant factors and solutions to make in-depth study for the narrow groove of the grinding process to prepare high-quality grinding wheel Theoreticalguidance.