Hydraulic press brake two cylinders synchronisation method include ELECTRIC-HYDRAULIC synchro and MECHANIC synchro.
Normally we call electric-hydraulic synchro press brake, CNC press brake. According to Chinese GB/T standard, model number is WE67K.
WE67K model CNC hydraulic press brake works with two optic scalers to measure Y1, Y2 position during bending. CNC controller will control proportion valve according to feedback of Y1, Y2. Two hydraulic cylinders will move parallel. Y1, Y2 accuracy is 0.001mm.
The advantage of E-H synchro type CNC hydraulic press brake:
- Fast speed: approaching/working/return speed are controlled by CNC;
- Full bending speed is adjustable, return height, speed, mute point, holding time;
- Back gauge is installed on wall frame, working speed is high and accurate;
- Y1, Y2 bending accuracy is high;
- Can install different punch/die over working length, good unbalance-bending performance;
Conventional hydraulic press brake is mechanic synchro press brake. Torsion bar style is normal. The machine Y1, Y2 is forced to work at same time with a big solid bar. There can be moving difference according to speed, friction, workpiece. Y1, Y2 works with the torsion bar.
In Chinese GB/T standard, call conventional press brake WC67Y model. Also can install NC controller over same structure to make program on Y, X. It is called WC67K, NC hydraulic press brake.
The advantage of the torsion bar press brake is cost lower; normally can work with general workpiece. the short coming is speed lower, accuracy lower.