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

Table 5

The table of variance data analysis.

	SS	Degrees of freedom,	Mean square,	Statistics,	Contribution rate,
Cold roll-beating speed,	0.166	4	0.0415	4.61	7.49%
Feed rate,	1.963	4	0.4907	54.52	80.69%
Fillet radius of the hobbing wheel,	0.223	4	0.0558	6.2	11.83%
Unknown factor,	0.036	3	0.009	/	/
Sum	2.388	/	/	/	100%