1)hydraulic press brake, 2)hydraulic bending machine 3) mulity-V lower die 4) ... lower die, 4.Torsion bar, 5. Hydraulic system6. Back gauge, 7. Upright, 8. Electrical cabinet, 9.Beam, 10. ... and lower die can be supplied,8.Operating CharacterDuring working, this machine has three types speed, --when ... of V-channel (mm) (normally the width is about 8 X plate thickness)σ b: tensile strength ( N/mm²) ...