Research On The Grinding Force And Surface Forming Process Of Wind Turbine Blade Grinding

With the development of the wind energy industry, the capacity of the wind turbinegenerator is becoming larger and larger, meanwhile the size of wind turbine blades isincreasing. It usually takes two grinding processes to the blade surface duringmanufacturing a large-scale wind turbine blade. The traditional way needs severalworkers using pneumatic grinding machines to polish the surface of the blade, whichgenerate lots of dusts that polluted the production site and harm to the health of theworkers. In order to release labor intensity and find an optimal way of grinding process, itis necessary to research on the mechanism of the grinding process.The current research situation of grinding mechanism and parameters duringgrinding process has been introduced. The analysis of single grit cutting polyurethaneprimer has been selected as the starting point. Then a single grit cutting model based ondividing the processing region into elastic and plastic deformation zones has been created,also the FEM model for single grit cutting that compared the abrasive force anddeformation of material in different abrasive form, grinding speed and grinding depth hasbeen built and analyzed.The classification of abrasive grits involved in the grinding process has beenanalyzed according to the effect in grinding. The model of grit back down and model ofgrit fall off based on the single abrasive grinding model has been established, which takethe affect between the grit and the binder into account. Due to the ideal condition ofsimulation, a compensation model of roughness of plastic material surface is presented.By dividing the surface of the abrasive grits into two parts, which provide the slidingforce and the cutting force, the comprehensive formula of grinding force has been built.Considering the distribution of grits, the surface model for abrasive discs andworkpiece have been simulated. By comparing the parameters of abrasive surface withthe measured parameters using instruments, verified the feasibility of the simulation.Applied the generated abrasive discs surface machining the material in ideal conditions,get the roughness changes during the processing. The model that simulated the abrasivesurface using Matlab has been created, lay a foundation for adding the various parametersinfluenced the process of grinding.