Influence of Drilling Parameters on the Delamination and Surface Roughness of Insulative-Coated Glass/Carbon-Hybrid Composite

Table 3

Experimental sequence followed to drill the HFRP composite samples using full factorial design of experiment.

Sample no.	Spindle speed (RPM)	Feed rate (mm/rev)	IC thickness (mm)	Delamination (entry)	Delamination (exit)	Surface roughness (μm)
1	3000	0.02	0.5	1.080	1.086	1.75
2			1.0	1.070	1.090	1.69
3			1.5	1.060	1.100	1.56
4			2.0	1.020	1.160	1.47
5		0.08	0.5	1.080	1.080	1.82
6			1.0	1.050	1.108	1.71
7			1.5	1.068	1.078	1.52
8			2.0	1.038	1.080	1.61
9	4500	0.02	0.5	1.080	1.100	1.63
10			1.0	1.068	1.110	1.58
11			1.5	1.060	1.120	1.61
12			2.0	1.050	1.158	1.42
13		0.08	0.5	1.064	1.076	1.70
14			1.0	1.052	1.110	1.63
15			1.5	1.062	1.102	1.62
16			2.0	1.080	1.128	1.53
17	6000	0.02	0.5	1.052	1.116	1.41
18			1.0	1.040	1.150	1.33
19			1.5	1.026	1.166	1.30
20			2.0	1.140	1.206	1.35
21		0.08	0.5	1.034	1.116	1.52
22			1.0	1.040	1.150	1.47
23			1.5	1.026	1.160	1.46
24			2.0	1.178	1.220	1.49