Gray Relational Optimization of the Surface Performance of Splines Formed by Cold Roll-Beating

Table 3

Dimensionless processing of the cold roll-beating spline-forming test data.

		Surface roughness (mm)	Residual stress (MPa)	Work hardening (%)
Reference sequence		1.000	1.000	1.000
Contrast sequence	1	0.557	0.000	0.269
	2	0.521	0.303	0.495
	3	0.339	0.685	0.728
	4	0.000	0.893	1.000
	5	0.661	0.077	0.202
	6	0.629	0.444	0.467
	7	0.564	0.652	0.641
	8	0.418	0.899	0.819
	9	0.864	0.271	0.064
	10	0.814	0.472	0.392
	11	0.654	0.692	0.507
	12	0.464	0.998	0.740
	13	1.000	0.322	0.028
	14	0.943	0.666	0.313
	15	0.686	0.880	0.428
	16	0.446	0.994	0.653
	17	0.957	0.420	0.000
	18	0.918	0.640	0.119
	19	0.764	0.907	0.360
	20	0.546	1.000	0.566