Face Grinding Mechanism And Simulation Of YG6 Cemented Carbide

Cemented carbide has become popular materials in manufacture industry due to its excellent mechanical properties such as higher hardness and stronger abrasive resistance.Precision grinding with super hard fine abrasives is the most commonly method which used to grind cemented carbide and other difficult-to-machine materials.Owing to the physical factors such as grinding force,thermal and deformations in the interaction of machine tool and the manufacturing process,the quality of parts will be unstable.The interactions between machining process and grinding are more prominent during precision grinding.Therefore,this thesis which focuses on the grinding mechanism of YG6 cemented carbide is necessary.Based on FEM,this paper establish the model of single grain and virtual wheel grinding to research on the influence of different grain sizes,grinding process parameters on grinding force under the interaction of coupled simulation.Then,experiments have been carried out to verify the FEM simulation results.This thesis will mainly carry research on the following aspects:1.The experiment of diamond single grain against YG6 cemented carbide is carried to obtain the friction coefficient and the simulation of single abrasive grain grinding is established by employing a conical grain.The simulation is built which included geometric model of grinding grain and workpiece,constitutive material of workpiece,model of friction and wear,etc.Based on the FEM of single grain,the influence of different grain sizes and process parameters on face grinding forces is researched.The experiments of single diamond grain cutting cemented carbide are used to verify the simulated results.2.Based on the diamond grinding wheel surface topography,a virtual grinding wheel is built to predict the grinding force of machine process.The influences of different process parameters on grinding forces are analyzed.And the experiment of diamond grinding wheel grinding YG6 cemented carbide is made to validate the simulation results.3.In consideration of the grinding process modle and spindle-wheel modle,a grinding process-machine interaction model is established.And coupled simulation method which is adopted to gain the grinding force under the interaction is proposed.With the assistance of Visual Basic 6.0,an new interface is developed to implement simulated data exchange between different software platforms,such as UG,ANSYS,DEFORM and MATLAB.And also,the coupled simulation result is verified by grinding experiments under different process parameters.The results show that the coupling method could improve the prediction accuracy of grinding force.