切削参数对SiCp/Al复合材料铣削棱边形貌的影响

针对20vol%的SiC_p/Al复合材料的棱边缺陷问题,利用单因素实验对其进行面铣,研究了切削参数对出口棱边形貌的影响。研究结果表明:出口棱边形貌受铣削速度变化的影响较大,在低速(40和80 m/min)和高速(200 m/min)时棱边形貌均较好;当进给量为0.02和0.04 mm/r时,出口棱边主要存在毛刺。随着进给量的不断增大,棱边出现了严重的缺陷和表层剥落,之后棱边又以少量的毛刺和缺陷为主。当只改变轴向切深时,出口棱边均会出现严重的缺陷,只改变轴向切深对改善棱边形貌质量效果不显著。因此,当铣削速度为低速或高速、进给量较小且轴向切深适中时,SiC_p/Al才能获得较好的出口棱边形貌。

Influence of Cutting Parameters on Edge Morphology of SiCp/Al Matrix Composites in Milling

In order to solve the problem of the edge defects of SiC_p/Al composites with a volume fraction of 20%, a single factor experiment was carried out to study the influence of cutting parameters on the edge morphology. The results show that the shape of the exit edge is greatly affected by the change of milling speed, and the edges are good at low speed and high speed; when the feed rate is 0.02 and 0.04mm/r, the exit edge are burrs. With the increase of the feed, the edge has serious defects and surface spalling, and then a small number of burrs and defects. When the axial depth of cut is changed, there will be serious defects in the edge of the outlet, and only changing the axial cutting depth has little effect on improving the quality of the edge morphology.