High performance bending machine with reduced energy dispersion

Details High performance bending machine with reduced energy dispersion High performance bending machine with reduced energy dispersion

B - Operations, Transporting

21

D

B21D 5/04 (2006.01) F15B 21/08 (2006.01)

Patent

CA 2397422

A bending machine comprises a bending unit moved by hydraulic actuators controlled by a variable displacement hydraulic pump provided with an electronic closed-loop flow rate, pressure and power control system including an electrically controlled proportional valve. The valve includes a valve spool for the control of the swivel angle of the pump and a proportional solenoid for moving the valve spool to a position corresponding to a desired swivel angle of the pump. The control system includes an inductive position transducer, a pump swivel angle transducer, a pump pressure transducer and a programmed electronic control unit which receives position, swivel angle and pressure signals from said transducers and predefined pressure, power and flow rate commands and supplies a control signal to said proportional solenoid.

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