Experimental Investigation On High-speed Grinding Of Cemented Arbide YG8and Process Optimization

Cemented carbide has excellent physical and mechanical properties such as highhardness, high wear resistance etc. and is widely applied in die, gasoline, automotiveindustry. Cemented carbide is a typical difficult-to-cut material, and some disadvantageswere found in conventional grinding process of cemented carbide. Therefore, thereare some engineering applications for studying high-speed grinding process ofcemented carbide.Experimental investigation on high-speed grinding of cemented carbide YG8wasapplied in this paper by detailed experimental plan. The effect of grinding depth,velocity of workpiece table and velocity of grinding wheel were discussed. Theexperimental results showed that lower grinding force, better surface roughness andhigh productivity were obtained during high-speed grinding process.The high-speed grinding process parameters play an important role in determiningthe surface integrity. The experimental design for optimizing surface roughness wasproposed in this paper based on Response Surface Methodology (RSM), then theexperimental data was analyzed by multiple linear regression program, and RSMmodel of surface roughness was set up for cemented carbide YG8. It is known thatgrinding depth is the main factor to affect surface roughness during high-speedprocess of cemented carbide YG8. The surface roughness increases with highergrinding depth and velocity of workpiece table. The prediction of surface roughnessand measured surface roughness are very coincidence that RSM model of surfaceroughness is proved to be correct. It is used not only to analyze the effect of grindingprocess parameters on surface roughness, but also to optimize the combination ofgrinding parameters by RSM model of surface roughness.