硬质合金台阶钻结构参数及钻削工艺参数对CFRP开孔性能的影响

基于VMC850B立式加工中心和UltraPAC超声C-扫描仪,搭建了碳纤维增强树脂基复合材料(CFRP)钻削试验平台,探讨了台阶钻结构参数及钻削工艺参数对CFRP钻削过程中的钻削轴向力和分层因子的影响。结果表明,钻削工艺参数对第一段钻削轴向力影响较大,台阶钻结构参数对第二段钻削轴向力的影响较大;分层因子的大小与第一段钻削轴向力和第二段钻削轴向力有关,当第一段和第二段直径比d/D0.5时,分层因子主要与第一段钻削轴向力有关;减小分层的优水平组合为第一段直径2.8mm,第二段锋角95°,主轴转速7000r/min,进给速度2.5mm/s。

Effect of structural parameters and drilling process parameters of carbide step drills on the performance of CFRP drilling

A CFRP drilling testing platform was set up to discuss step drill structural parameters and drilling process parameters under composite drilling axial force and delamination factor influence based on the VMC850B vertical machining centers and UltraPAC ultrasonic C-scan.The resnlt shows that drill process parameters have significant influence on the first section of the drilling thrust and step drill structural parameters have significant influence on the second section of the drilling thrust.The value of delamination factor is connection with the first section of the drilling thrust and the second section of the drilling thrust.When d/D＞0.5,the size of delamination factor is mainly connection with the first section of the drilling thrust.When the first paragraph diameter and the second point angle are 2.8 mm and 95°,spindle speed and feed speed are 7000 r/min and 2.5 mm/s,the delamination can be reduced.