Cell-Body Grinding Disc Simulation And Experimental Research

With the development of information technology, photoelectron technology and aerospace technology, the requirement of process is more and more higher, and the need of process which has the performance of high efficiency, high precision and low surface damage keeps increasing. The existing abrasive particle processing, the majority of the whole disc processing is very difficult to meet the above requirement.A new process method called Multi-cell-disc abrasive particle process is proposed in this paper. This technique could reduce change of cutting depth owing to difference of grain size and protrusion height of surface abrasive of grinding plate,and near equal-cutting-depth processing is realized. For characteristics and machining performance of Multi-cell-disc, this paper relates to the following studies:The model of cutting depth distribution of grains of Multi-cell-disc was analyzed and established. The shape of the abrasive grit has been discussed, and the abrasive grit shape model of unit-bold was simplified. The superficial characters of elastic elements were tested by Nano-indentation tests, and the loading-displacement character of superficial abrasive particles during loading was gotten. It showed that elastic elements generate elastic deformation during loading. on this basis,The displacement of abrasive grit was analyzed during processing. The normal force analysis to single grit was set up by using elastic mechanics, and the relationship between cutting depth and the grain size, Cell body density, Elastic element stiffness, Work-piece hardness was obtained. The grain size is obeyed log-normal distribution. By using probability and statistics, the model of cutting depth distribution of grains was obtained. A theoretical foundation of optimization and evaluation of unit-body was set up.On the basis of the model of abrasive grains cutting depth distribution of Multi-cell-disc, the influence of properties (Cell body size, elastic stiffness), processing technology (processing load) and other parameters on the abrasive grains cutting depth distribution was analyzed by using computer simulation. A unit-body abrasive machining experiment was carried out with the optimal parameters and compared with whole disc the under the same processing conditions. The results showed that the abrasive grains cutting depth distribution of unit-body of simulation was basically consistent with that of experiment. There were some deviations with the model simulation between the experimental results. The results also showed that Cell body elastic stiffness, density of the cell body was most powerful factor on the abrasive cutting depth distribution. In addition to 1000 # Al2O3 abrasive as an example, analyzed and compared with the same parameters of the cell body, compared to abrasive grit processing, cell body abrasive surface quality after processing and the time required was better than the overall average disc to verify the cell body abrasive grit and efficient processing of precision.In this dissertation, cutting depth distribution of grains of unit-body in processing was studied. Research showed that through the cell body cell body abrasive distribution of density, elastic stiffness, processing load to reasonable design, right materials, components and efficient processing. There were benefits to design, manufacture and application of unit-body.