高体分SiC_(p)/Al复合材料精密铣削试验研究  

Precision Milling Experiment Study of High-Volume Fraction SiC_(p)/Al Composites

作　　者：冒鹏程 闫鑫卓 伍帅 储金辉 杨博宇 MAO Pengcheng;YAN xinzhuo;WU Shuai;CHU Jinhui;YANG Boyu(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201699,China)

机构地区：[1]上海航天精密机械研究所,上海201699

出　　处：《上海航天(中英文)》2024年第S2期168-174,共7页Aerospace Shanghai(Chinese&English)

基　　金：国家专项(2207-370104-07-02-106030)

摘　　要：针对高体积分数SiC_(p)/Al复合材料加工中的刀具快速磨损和表面完整性差等问题,通过精密铣削试验,探讨了切削参数对切削力和表面质量的影响。同时,针对加工过程中因碳化硅颗粒翻转、切断和破碎等问题产生的如坑洞、微裂纹、划痕及基体材料撕裂等现象进行了表面质量控制及机理分析。结果显示:每齿进给量和切削深度是切削力的主要影响因素,而表面粗糙度主要受每齿进给量和切削速度影响,受切削深度的影响不大;高切削速度会使得铝基体产生熔化并产生基体涂抹现象以填补表面凹坑从而减少表面缺陷,而小的每齿进给量可提高单位面积基体涂抹次数,进一步减少缺陷;在转速8000 r/min、切削深度0.2 mm及每齿进给量7.5μm/z下获得了最佳表面质量,其表面粗糙度为0.113μm,表面光洁度达到6级精度。This study addresses the rapid tool wear and poor surface integrity issues in the machining of highvolume fraction SiC_(p)/Al composites.Through precision milling experiments,the effects of cutting parameters on cutting forces and surface quality were investigated.The study also analyzed the control of surface quality and the underlying mechanisms,focusing on phenomena such as pits,microcracks,scratches,and tearing of the matrix material caused by the flipping,cutting,and fracturing of silicon carbide particles during the machining process.The results indicate that the feed per tooth and cutting depth are the primary factors affecting cutting forces,while surface roughness is mainly influenced by the feed per tooth and cutting speed,with cutting depth having a minimal impact.Higher cutting speeds can lead to the melting of the aluminum matrix,resulting in a smearing effect that fills surface pits and reduces defects.Conversely,a smaller feed per tooth increases the frequency of matrix smearing per unit area,further reducing surface defects.Optimal surface quality was achieved at a spindle speed of 8000 r/min,a cutting depth of 0.2 mm,and a feed per tooth of 7.5μm/z,resulting in a surface roughness of 0.113μm,and the surface roughness reaches level 6.

关 键 词：高体分SiC_(p)/Al复合材料 精密铣削 铣削力 表面质量控制 材料去除机理 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]