Experimental Research on Carbon Fiber Reinforced Silicon Carbide Matrix Composite Brake Material by PCD Tool Face Turning
In this paper,the PCD tool is used to carry out the orthogonal test of Cf/SiC face turning to study the influ-ence of cutting parameters on cutting force and surface roughness,and the cutting removal mechanism of the material is deeply analyzed.The results show that the spindle speed,the feed rate and the back engagement of cutting edge all affect the cutting force and surface roughness.Among them,the amount of back engagement of cutting edge has the greatest impact on each cutting force,and the feed rate has the greatest impact on surface roughness.Cf/SiC is mainly removed by brittle fracture,and the main processing defects are matrix breaking and falling off,microcracks,fiber outcropping and pulling out,interface debonding and delamination.The test results prove that Cf/SiC can control the occurrence of processing defects by face turning,and the surface roughness of the cutting surface can reach 3.2μm,that is,Cf/SiC can achieve semi-finishing.The optimal cutting amount in the test is n=710r/min,f=0.05mm/r,ap=0.30mm.
万方数据
维普
