Evaluation of Parameters Affecting Magnetic Abrasive Finishing on Concave Freeform Surface of Al Alloy via RSM Method

Table 4

Performed experiments and their values.

Number	Rotational speed, (rpm)	Feed rate, (mm/min)	Gap, (mm)	Amount of powder, (g)	Ra (%)
1	−1	−1	−1	−1	35.61
2	−1	−1	−1	1	40.59
3	−1	−1	1	−1	35.39
4	−1	−1	1	1	37.32
5	−1	1	−1	−1	42.11
6	−1	1	−1	1	32.96
7	−1	1	1	−1	37.30
8	−1	1	1	1	30.87
9	1	−1	−1	−1	52.76
10	1	−1	−1	1	57.02
11	1	−1	1	−1	42.19
12	1	−1	1	1	45.58
13	1	1	−1	−1	43.62
14	1	1	−1	1	40.50
15	1	1	1	−1	32.84
16	1	1	1	1	30.34
17	0	0	0	−2	39.46
18	0	0	0	2	40.58
19	0	0	−2	0	45.87
20	0	0	2	0	31.99
21	0	−2	0	0	47.62
22	0	2	0	0	37.30
23	−2	0	0	0	35.11
24	2	0	0	0	45.55
25	0	0	0	0	40.56
26	0	0	0	0	46.06
27	0	0	0	0	43.48
28	0	0	0	0	41.03
29	0	0	0	0	40.27
30	0	0	0	0	41.57
31	0	0	0	0	38.07