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

Table 4

Range analysis table of maximum thinning rate.

Level	A	B	C	D
Mean 1	9.085	9.033	9.403	9.393
Mean 2	9.405	9.335	9.118	9.973
Mean 3	9.473	9.278	9.458	9.270
Mean 4	9.450	9.768	9.435	8.778
Range	0.365	0.735	0.340	1.195