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

Table 3

Scheme of orthogonal experiment.

Number	Factors
	BHF/kN	Die corner radius/mm	Die clearance/mm	Friction coefficient
1	400	3		0.10
2	400	6		0.12
3	400	9		0.14
4	500	3		0.14
5	500	6		0.10
6	500	9		0.12
7	600	3		0.12
8	600	6		0.14
9	600	9		0.10