Optimizing Selection Of Processing Parameters Of Mill Grinding SiC/Al Composites

Silicon carbide particles reinforced aluminum matrix composites areprimarily used in the weapons,aerospace,automobile manufacturing,electronicsetc,for their advanced material characteristics such as high specific strength,high specific rigidity,high thermal stability and high dimensional stability,etcAt present,cutting with PCD too ls is the main method for machining thiskind of material However,due to the existence of SiC particles,the problemsare serious tool-wear,poor machining quality,high machining cost in theprocess,which limit the wide application of this material Therefore,it is verynecessary to invest the high efficiency machining method for this materialThis topic is the main method of milling grinding SiC／A1 compositematerials for machining,through the research process parameters on the surfaceroughness and grinding milling force the influence law,and realize the optimalselection oftechnological parametersFirstly,according to the knowledge of grinding principle and compositematerial mechanics,combined with characteristics of mil-grinding,the processof material removal when mill-grinding the material was analyzed,and thecorrectness oftheoretical analysis is validated by experimentsSecondl~the effects of mill-grinding speed,feed rate,and depth of mill-grinding on mill-grinding foece were studied In the analysis of the dataobtained from the orthogonal experiment,empirical equations of mill-grindingforce were obtainted Depending on related theory,the empirical equations ofmill-grinding force were analysisFinally,experiments were carried out on processing parameters which haveaffect on surface roughness The affect of processing parameters on surfaceroughness were studied with single factor experiment In the analysis of the dataobtained from the orthogonal experiment,empirical equation of surfaceroughness wasobtainted orthogonal experiment the milling grinding SiC／A1composite material process parameters and the surface roughness,and theprocessing parameters combination by which can gain larger material removalefficiency and better surface roughness was analyzed Using the combination tomill-grinding this material,the surface roughness obtained was 1 25 8¨m...