PTFE in Wet and Dry Drilling: Two-Tier Modeling and Optimization through ANFIS

Table 3

Experimental results.

Run no.	Drilling variables			Dry condition (no coolant)	Wet condition (with coolant)
	Spindle speed (N)	Feed rate (f)	Point angle ()
				Surface roughness	Surface roughness
	rpm	mm/min	degree	μm	μm
1	800	0.05	100	0.911	0.89
2	800	0.05	118	0.887	0.82
3	800	0.05	135	0.856	0.81
4	800	0.1	100	0.895	0.88
5	800	0.1	118	1.117	1.09
6	800	0.1	135	1.362	1.24
7	800	0.15	100	1.15	1.12
8	800	0.15	118	1.354	1.31
9	800	0.15	135	1.581	1.49
10	1500	0.05	100	0.806	0.78
11	1500	0.05	118	0.97	0.84
12	1500	0.05	135	0.956	0.91
13	1500	0.1	100	0.983	0.92
14	1500	0.1	118	1.057	1.04
15	1500	0.1	135	1.162	1.12
16	1500	0.15	100	1.432	1.34
17	1500	0.15	118	1.488	1.37
18	1500	0.15	135	1.575	1.51
19	2200	0.05	100	0.953	0.92
20	2200	0.05	118	0.897	0.89
21	2200	0.05	135	0.88	0.85
22	2200	0.1	100	1.324	1.31
23	2200	0.1	118	1.25	1.22
24	2200	0.1	135	1.215	1.19
25	2200	0.15	100	1.968	1.91
26	2200	0.15	118	1.875	1.82
27	2200	0.15	135	1.822	1.79