Gradient Boosted Trees Predictive Models for Surface Roughness in High-Speed Milling in the Steel and Aluminum Metalworking Industry

Table 4

Examples of cutting conditions of geometries and Ra values in Exp-2.

Machine	F; (mm min^−1)	diam; (mm)	ae; (mm)	ap; (mm)	HB	n; (rpm)	Ra; (nm)
M1	500	10	10	10	111	8000	Smooth
	675	10	10	5	110	8000	Smooth
	750	10	5	10	111	8000	Smooth
	550	12	10	5	112	8000	Smooth
	675	12	5	10	111	8000	Fine
	750	12	5	5	110	8000	Fine
	500	12	10	10	111	9600	Fine
	675	12	5	5	111	9600	Fine
	750	12	10	10	111	9600	Fine
M2	500	12	10	10	85	12000	Smooth
	675	12	10	5	85	12000	Smooth
	750	12	10	10	85	15000	Fine
	500	16	10	5	85	15000	Smooth
	675	16	5	10	85	15000	Smooth
	750	16	5	5	85	15000	Smooth
	500	20	5	10	85	15000	Smooth
	675	20	5	5	87	15000	Smooth