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

Table 11

SNR response table.

Level	Factor
	Molding pressure (MPa)	Feeding quantity (mm)	Friction coefficient
1	−100.3000	−100.4416	−100.4646
2	−100.6358	−100.7773	−100.8248
3	−101.1300	−101.1097	−101.0622
4	−102.6957	−101.3828	−101.3598