Study On The Grinding Temperature Field And The Tribological Properties Of Grinding Surface Of Cemented Carbide

Diamond sharpening is a crucial processing procedure in the preparation process of thecemented carbide tool. Compared to other processing method, grinding machining methodhas a high specific grinding energy, meanwhile, most of the input energy converted to heatand distributed in the grinding system, and60to95percent of heat introduced to workpiecethrough the grinding contact zone, that lead to high temperature in grinding contact zone andworkpiece surface’s thermal damage that mainly represent to grain slip and cracks and thedecrease of abrasion resistance. Therefore, in order to avoid thermal damage caused by theexcessively high temperatures, it is very necessary to study grinding temperature of thecemented carbide. In this study, theoretical, experimental, computer numerical simulationwere applied to explore carbide grinding process.First, research status of carbide grinding and grinding temperature field at home andabroad were introduced in this paper, and the application of heat transfer theory in grindingtemperature field was elaborated。The experimental program which is suit to analysis isestablished on the basis of existing experimental conditions。Secondly, by use of grinding bipolar thermocouple thermometry to measure real-timetemperature, online force for different grinding wheel speed, workpiece speed, grinding depthin grinding process, and from the experiments results based on the friction and wear test onprocessed grinding workpiece, it can be drawn from the analysis of the experimental data that:(1)grinding temperature will rise with the increasing of wheel speed、workpiece speed、grinding depth, the effect of grinding depth on grinding temperature is maximum, followed bythe workpiece speed, grinding wheel speed influence on grinding temperature is minimum.(2)In the same wheel speed and grinding width, grinding temperature is rising with the increaseof the material removal rate.(3) With the increase of grinding temperature and less than530℃, processed cemented carbide surface friction coefficient relatively stable after a running-inperiod, higher than530℃, with grinding temperature increase, the processed surface frictioncoefficient and the jitter amplitude of the coefficient of friction becomes larger.Finally, on the basis of the triangle moving heat source thoughts and the Lavine A S heatdistribution model,the results which get by ANSYS finite element simulation analysis of thetemperature field in the grinding process, compared to the actual measurements, the finiteelement analysis results is close to the actual results. Within the scope of the ordinary grindingconditions, the finite element analysis can replace experiments to predict the impact on thegrinding parameters and grinding temperature. In this study, the law between grinding parameters and grinding temperature and the law between grinding temperature andfriction-wear properties of cemented carbide were discussed, it has the guiding significancefor grinding processing cemented carbide tool.