Minimization of Surface Roughness and Tool Vibration in CNC Milling Operation

Table 5

Regression analysis coefficient for tool life (), surface roughness (), and tool vibration ().

	Surface roughness ()		Tool life ()		Tool vibration ()
	Coefficient	value	Coefficient	value	Coefficient	value
Intercept	0.13	0.0262	4.31	0.0001	18.15	0.0107
	0.049	0.7350	−1.30	0.0001	1.28	0.1089
	0.30	0.0511	−0.82	0.0001	2.56	0.0035
	0.38	0.0165	−0.51	0.0002	2.39	0.0057
	−0.051	0.7762	0.44	0.0042	2.25	0.0263
	0.24	0.1920		0.9703	−0.83	0.3802
	0.45	0.0214	−0.047	0.7312		1.0000
	0.47	0.0759	−0.32	0.1028	1.06	0.4309
	−0.039	0.8760	0.13	0.4993	0.89	0.5060
	0.43	0.1006	−0.22	0.2495	−0.94	0.4801