Abstract
Through range and variance analyses of an orthogonal experiment, the key factors of abrasive flow precision polishing (AFPP) are confirmed. The influence of grinding speed, abrasive concentration and abrasive particle size parameters on AFPP is secondary to action factors. The optimum AFPP process parameters are obtained. Under these parameters, the Ra value of the surface roughness of the nozzle orifices is acceptable. From 0.679 µm before abrasive flow polishing (AFP) to 0.143 µm, the quality of small holes improved obviously. The quality prediction model of the AFPP baffle servo valve is established through experimental research and data calculation, which can effectively predict the surface quality of the AFP baffle servo valve nozzle. The results of the AFP experiment show that the prediction model is effective and feasible and can obtain the best surface quality. The research results can provide theoretical guidance and technical support for the development of quality control technology of AFPP nozzles.
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