The principle of the hydraulic and pneumatic transmission system: the oil output by the axial CNC plate shearing machine
piston pump enters the main oil circuit and the control oil circuit respectively after the check valve CNC plate shearing machine.
The pressure oil of the main oil route enters the upper chamber of the main
oil cylinder and directly enters the oil chamber of the pressure cylinder.
The oil in the control oil route enters the combination valve, which makes the poppet valve open,
and the oil flows back to the tank through the poppet valve port and two position two way reversing valve at the same time.
At this time, the main oil circuit loss of pressure, pressure cylinder and the main oil cylinder can not be inoculate.
CNC plate shear hydraulic pneumatic transmission system, tension by the axial piston pump,
combination valve, the main cylinder, nitrogen return cylinder and pressure cylinder and other components.
The pressure oil required by the system is provided by the axial piston pump,
and the two main cylinders drive the tool rest to swing down and shear.
The return of the tool rest is controlled by the nitrogen cylinder, and the return pressure is about 6MPa.
When the shearing activity is completed, the stroke block will impact the limit switch,
the two-position four-way reversing valve will lose power and reverse, the hydraulic system will discharge pressure,
the tool rest will return quickly under the action of the nitrogen return cylinder,
and the pressure cylinder will reset and end the pressure measure under the action of the spring tension
When the two-position and two-way reversing valve gets electric reversing,
the oil in the control oil pipeline only enters the relief valve. Because the relief valve is closed under its set pressure value