Research On The Failure Mechanism Of Destruction Of The Grinding Wheel Based On ANSYS

With the rapid development of machinery manufacturing industry, our country hasbecome the "world manufacturing works", which brought the rare opportunities ofdevelopment for the labor-intensive abrasives industry, and the larger exporting growthof the grinding wheel that is the low-tech, low value-added product. However, due to thepoor safety of the grinding wheel, it may cause burst phenomenon, and even may lead tofatal tragedy at home and abroad in recent years. This has not only caused the seriouseconomic losses and the personnel casualties, but also has influenced greatly theinternational reputation of our products and hindered the benign development of themarket. In addition, due to the enhancement of mechanical safety requirements and thestandard is consummating day-by-day, people pay more and more attention to theperformance testing of the grinding wheel.Based on the finite element numerical simulation to the grinding wheel, we canobserve visually its stress and strain distribution, deformation and modal parametersunder different conditions by computer. This is of great significance for the improvementdesign, determining the process parameters, reducing the wear and vibration failure,improving cutting quality, increasing reliability, and so on.In this paper the three-dimensional solid geometry model of the grinding wheel wasestablished by ANSYS, then the model was meshed to be discretization, so an infinitenumber of degrees of freedom problem was converted into a limited degree of freedomone through discretization, thus obtaining the finite element grid, finally the grindingwheel was imposed displacement boundary condition to obtain the finite element model. The solution was calculated by applying different load conditions on the finite elementmodel, obtaining the stress and strain distribution of the grinding wheel under differentworking conditions, and then each condition was analyzed to determine the factor whichinfluenced the grinding wheel seriously. In the three factors considered, the influence ofthe centrifugal force to the grinding wheel was greatest, the side force was followed, andthe influence of the grinding force was weakest.Considering that the vibration damage of the grinding wheel is also a failure of oneof the important forms, and people pay more and more attention and consideration on itsdynamic characteristics in the development design stage of the product. Therefore, thefinite element method was carried separately on the intrinsic modal analysis in thestationary state and the prestressed modal analysis in the rotating state. After thecontrastive analysis shows that the increase rate of the inherent frequency is small, andthe corresponding modal shape basically is consistent, without large changes. Thus, thecentrifugal force is very weak to the modality’s influence of the grinding wheel, basicallymay be negligible. In addition, through the finite element modal analysis of the grindingwheel, it may effectively avoid the resonance damage, when the excitation frequency isclose to its inherent frequency.Finally, this paper carried on simple introduction to the grinding wheel on theperformance testing, the related research may provide a theoretical basis and technicalsupport for the testing equipment research and development of the grinding wheel.