Statistical and Experimental Investigation of Hardened AISI H11 Steel in CNC Turning with Alternative Measurement Methods

Table 10

Optimum cutting parameters level (D) and value (V) for surface roughness (Ra), electric current, sound intensity level, and energy consumption.

	Ra (μm)			Sound level (dB)			Electric current (A)			Energy consumption (kWh)
	(mm)	(m/min)	f (mm/rev)	(mm)	(m/min)	f (mm/rev)	(mm)	(m/min)	f (mm/rev)	(mm)	(m/min)	f (mm/rev)
1	0.43	0.40	0.19	74.94	74.87	74.93	2.64	2.70	2.66	19.53	13.68	18.54
2	0.39	0.39	0.32	75.02	75.06	75.10	2.71	2.71	2.73	10.01	11.91	10.53
3	0.36	0.38	0.66	75.30	75.34	75.23	2.86	2.80	2.81	6.99	10.94	7.46
D	3	3	1	1	1	1	1	1	1	3	3	3
V	0.15	180	0.05	0.05	140	0.05	0.05	140	0.05	0.15	180	0.13

The bold values represent optimum values for each cutting parameter. D: level of optimum input parameters; V: optimum input values.