Research Article
Design of Hydraulic Bulging Die for Automobile Torsion Beam and Optimization of Forming Process Parameters
Table 6
Level factor setting table.
| Level | Factor | A supporting pressure (MPa) | B molding pressure (MPa) | C feeding quality (mm) | D friction coefficient |
| 1 | 20 | 150 | 25 | 0.075 | 2 | 40 | 180 | 30 | 0.1 | 3 | 60 | 210 | 35 | 0.125 | 4 | 80 | 240 | 40 | 0.15 |
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