Casing Drilling Technology of Laminated Structure of CFRP/Aluminum Alloy for Satellite
Aiming at the problems of poor precision and many defects in the drilling of CFRP/Aluminum alloy lami-nated structure in satellite frame products,the drilling technology of this kind of laminated structure is optimized and im-proved.Through summarizing and classifying the characteristics of CFRP/metal laminated structure,the drilling mechanism of traditional drilling,spiral milling and sleeve drilling is analyzed.The comparative test is carried out and the optimal pro-cessing technology scheme is determined through the comprehensive evaluation of aperture size,hole-wall quality and fall-off chips′number.The influence of processing parameters on the machining quality and accuracy of laminated structure-holes is studied by single factor comparative test,and the process parameters are optimized.The test results show that the quality and precision of hole-making are improved obviously by casing drilling technology.The optimal spindle speed is 3000～4000r/min,and the feed speed is 30～40mm/min.Under this processing parameter,the aperture size meets the tolerance requirements,and the processing defects are few,and the apparent quality of the hole-wall is quiet well.
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