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

Figure 3

General assembly diagram of hydraulic expansion die for torsion beam: (1) upper die base; (2) cylinder; (3) pull-out rod of upper die; (4) displacement sensor; (5) hydraulic cylinder; (6) ejection cylinder; (7) matrix; (8) lower die base; (9) sealing plug; (10) punch.