hydraulic pipe bending machine & plate bending machine Steel-welded construction,vibration to eliminate stress,with high strength and good rigidity; Hydraulic top-drive,steadiness and reliability.Mechanical stop,steel torsion bar to maintain synchronization,hingh precision; Motorized-adjusting device of backgauge and rams storke,fine adjusting by handwheel,numerical display; Deflection compensation unit installed on the top die.Manual crowned bottom die holdler is adopted for the machine above 250ton slength4000mm; Travel limit protection.Full machine guarding with safety interlocker