Taguchi Robust Design for Optimizing Surface Roughness of Turned AISI 1045 Steel Considering the Tool Nose Radius and Coolant as Noise Factors

Table 8

Measured and expected values of Ra under optimum conditions for all combinations of noise factors.

Test run	Surface speed (m/min)	Depth of cut (mm)	Feed rate (mm/rev)	Tool nose radius (mm)	Coolant	Measured Ra (µm)	Predicted Ra (µm)	(%) Error
1	150	0.64	0.05	0.4	On	0.509	0.522	3
2	150	0.64	0.05	0.4	Off	0.964	0.915	5
3	150	0.64	0.05	0.8	On	0.591	0.622	5
4	150	0.64	0.05	0.8	Off	0.766	0.737	4