Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

Table 4

Thickness reduction and thinness reduction data obtained by orthogonal experiment.

Number	Factors				Evaluation index
					Maximum thinning rate/%	Maximum thickening rate/%
1					30.87	6.27
2					29.14	6.81
3					28.63	5.87
4					36.31	5.02
5					29.16	6.53
6					29.07	5.53
7					32.56	5.06
8					35.87	4.98
9					29.44	5.32