The Effect of Cutting Speed and Feed Rate on Hole Surface Integrity in Single-shot Drilling of Metallic-Composite Stacks

Experimental studies on the performance of different structure tools in drilling CFRP/Al alloy stacks

“…The measurement result shows that CFRP hole roundness is about 6 μm at low feed, and with the increase of the feed, roundness error increases to 15 μm. It is consistent with the results reported in the literature [17]. The roundness of aluminum alloy hole usually stays around 10 μm, which does not change significantly with the process parameters.…”

“…The Orthogonal layer angle 0°/90°Microscopic structure Fig. 1 The microscopic structure of CFRP laminate conclusion of literature [17] shows that main factors related to the processing quality and precision are spindle speed and feed and the effect of feed is greater than that of spindle speed. So designed feed varies slightly, while designed speed varies relative drastic, as shown in Table 2.…”

An experimental study on drilling of unidirectional GLARE fibre metal laminates

“…The stacking sequence investigation usually involved placing the composite sample either between two different types of metals such as titanium and aluminium [9,10], or on the top of a metallic sample [11][12][13][14][15][16] as depicted in Figure 2. This helped reducing the peel up and push out delamination when drilling composites [9], and in some singular cases placing the composite beneath the metal sheet [17].…”

“…The aim of these studies was to optimise the drilling process and evaluate the hole quality for the different materials [10,[14][15][16][17][18]. Some studies have also looked into the effect of the cutting tool types, their geometry and the coating influence on its tool life [10-12, 15, 16, 18, 19]; other studies investigated the effect of using coolants supplied internally through the cutting tool or externally through a nozzle [9,16,20].…”

Comprehensive Study on Machinability of Titanium Composite

“…C.L. Kuo et al [3] carried out studies to assess the effect of cutting quickness (Ti/CFRP/Al: 30/120/120 and 36/144/ 144m/min) and feed rate (0.05, 0.08, 0.12 and 0.15 mm/rev) on work piece surface integrity following single-shot drilling of multilayer metallic composite stacks (Ti-6Al-4V/CFRP/Al-7050) using CVD diamond coated tooling. They found that when operating with the lower cutting speed set of 30/120/120 m/min and a feed rate of 0.08 mm/rev, average hole surface roughness (Ra) was ~0.60, 0.87 and 0.27 μm in the Ti, CFRP and Al layers respectively after 30 holes.…”