Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Table 3

Experimental results for the cold roll-beating spline.

Experiment; serial number	Processing parameters			Degree of work hardening,; (%)				Residual stress,; δ (MPa)
				Test; point 1	Test; point 2	Test; point 3	Average; value	Test; point 1	Test; point 2	Test; point 3	Average; value
1	1	1	1	140.97	140.95	140.96	140.96
2	1	2	2	143.32	143.36	143.37	143.35
3	1	3	3	147.58	147.65	147.66	147.63
4	1	4	4	148.65	148.74	148.74	148.71
5	1	5	5	149.05	149.09	149.07	149.07
6	2	1	2	140.22	140.28	140.25	140.25
7	2	2	3	142.49	142.51	142.44	142.48
8	2	3	4	146.35	146.27	146.34	146.32
9	2	4	5	147.39	147.41	147.43	147.41
10	2	5	1	148.09	148.11	148.07	148.09
11	3	1	3	140.84	140.89	140.88	140.87
12	3	2	4	141.94	141.88	141.94	141.92
13	3	3	5	145.88	145.94	145.94	145.92
14	3	4	1	146.75	146.79	146.81	146.78
15	3	5	2	148.5	147.5	148	148
16	4	1	4	139.85	139.89	139.84	139.86
17	4	2	5	142.01	142.03	142.02	142.02
18	4	3	1	145.75	145.83	145.85	145.81
19	4	4	2	147.68	147.73	147.75	147.72
20	4	5	3	149.04	149.01	149.01	149.02
21	5	1	5	139.66	139.75	139.75	139.72
22	5	2	1	142.32	142.38	142.41	142.37
23	5	3	2	146.17	146.22	146.21	146.2
24	5	4	3	148.21	148.21	148.25	148.23
25	5	5	4	148.86	148.89	148.89	148.88