Design of Hydraulic Bulging Die for Automobile Torsion Beam and Optimization of Forming Process Parameters

Table 5

Range analysis table of maximum thickening rate.

Level	A	B	C	D
Mean 1	18.483	16.570	18.448	18.273
Mean 2	18.338	17.585	18.385	18.348
Mean 3	18.348	18.990	18.415	18.510
Mean 4	18.550	20.573	18.470	18.588
Range	0.213	4.003	0.085	0.315