Prediction of Tool Lifetime and Surface Roughness for Nickel-Based Waspaloy

Table 5

Comparison for the experimental and predictive surface roughness for each set of the cutting parameters.

The first group cutting parameters	V = 40 m/min, fz = 0.3 mm/tooth, ap = 0.3 mm
Experimental value (μm)	0.297	0.328	0.325	0.412	0.483
Predictive value (μm)	0.295836	0.308980	0.327580	0.429	0.502172
Error (%)	0.392	5.799	0.794	1.7	3.969
The second group cutting parameters	V = 37.5 m/min, fz = 0.35 mm/tooth, ap = 0.25 mm
Experimental value (μm)	0.330	0.330	0.330	0.330	0.330
Predictive value (μm)	0.323766	0.323766	0.323766	0.323766	0.323766
Error (%)	1.889	1.889	1.889	1.889	1.889
The third group cutting parameters	V = 35 m/min, fz = 0.4 mm/tooth, ap = 0.2 mm
Experimental value (μm)	0.322	0.332	0.351	0.420	0.427
Predictive value (μm)	0.348968	0.315	0.371536	0.383688	0.417664
Error (%)	8.375	1.7	5.851	8.646	2.186