刀具磨损因素分析及对CFRP制孔质量的影响

Factor analysis of tool wear and its influence on CFRP drilling quality

为了保证碳纤维增强树脂基复合材料(CFRP)加工质量,研究刀具磨损对CFRP制孔质量的影响,本文制备了CFRP层压板样件,对刀具磨损规律、刀具磨损与CFRP制孔质量的关联性进行定量试验研究。使用数字显微镜跟踪标定制孔过程中的后刀面磨损量VB,绘制了刀具磨损曲线,对不同转速下的后刀面磨损规律进行了定量对比分析。同时通过对制孔后的出口毛刺长度和分层情况进行试验标定,分别利用出口毛刺缺陷因子和制孔分层缺陷因子对制孔质量进行评价,绘制了缺陷因子与VB的相关曲线,对刀具磨损因素及对制孔质量的影响进行了定量分析。结果表明:高转速下刀具更早进入急剧磨损,但在急剧磨损阶段,低转速下刀具磨损更快;刀具进入急剧磨损阶段后,刀具磨损逐渐成为出口缺陷的主要原因,且刀具磨损量相同时高转速下制孔质量更高。

In order to ensure the processing quality of carbon fiber reinforced resin matrix.composites(CFRP),the effect of tool wear on the hole quality of CFRP is studied.By making CFRP laminates,the relationship between tool wear law and hole quality of CFRP materials is quantitatively studied.The tool wear curve is drawn by tracking the wear amount VB of the rear cutter face in the process of marking the customized hole with a digital microscope,and the wear law of the rear cutter face under different rotating speeds is quantitatively.compared and analyzed.At the same time,the length and stratification of outlet burr are calibrated by experiments.The quality of the drilled hole is evaluated by the exit burr defect factor and the hole processing delamination defect factor respectively.The correlation curve of defect factor and VB was drawn.Quantitative analysis was made on tool wear factors and their impact on drilling quality.The experimental results show that the cutting tool enters the high-speed wear stage quickly at high speed.In the high-speed wear stage,the tool wear is faster at low speed.After the tool enters the stage of high-speed wear,tool wear gradually becomes the main cause of outlet defects,and the quality of hole making is higher at high speed when the tool wear amount is the same.