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

Table 5

Cold roll-beating spline-forming evaluation parameter comparison of the sequence gray correlation coefficient and the gray correlation degree.

Test time	Gray correlation coefficient			Gray correlation; degree	Sorting
	Surface; roughness	Residual; stress	Degree of; hardening
1	0.5302	0.3333	0.4062	0.141	20
2	0.5107	0.4177	0.4975	0.159	18
3	0.4307	0.6135	0.6477	0.191	10
4	0.3333	0.8237	1.0000	0.249	1
5	0.5959	0.3514	0.3852	0.146	19
6	0.5741	0.4735	0.4840	0.169	16
7	0.5342	0.5896	0.5821	0.190	11
8	0.4621	0.8319	0.7342	0.227	3
9	0.7862	0.4068	0.3482	0.166	17
10	0.7289	0.4864	0.4513	0.182	15
11	0.5910	0.6188	0.5035	0.188	12
12	0.4826	0.9960	0.6579	0.236	2
13	1.0000	0.4244	0.3397	0.188	13
14	0.8977	0.5995	0.4212	0.206	7
15	0.6143	0.8065	0.4664	0.204	8
16	0.4744	0.9881	0.5903	0.225	4
17	0.9208	0.4630	0.3333	0.183	14
18	0.8591	0.5814	0.3621	0.192	9
19	0.6793	0.8432	0.4386	0.211	6
20	0.5241	1.0000	0.5353	0.224	5