175T3200 Press Brake machine is the basic equipment of sheet metal processing, is also the most common kind of general equipment, the amount of use is large, then the mechanical equipment will appear such and such problems after long-term use, xiaobian summarizes for you the hydraulic bending machine is most prone to part of the problem, and its solution. For your information.
(1) The damping hole is blocked, and the system has no main pressure relief valve failure. Improper adjustment, spring broken, valve core conical seal is not good or valve core stuck. Clean, grind, adjust, repair or replace the relief valve. Solenoid directional valve is faulty, valve core stuck. Clean, grind or replace the slide valve.
(2) the slider does not act but can rely on the weight of the axial piston pump can not supply pressure oil: oil shortage; The motor failed to start after checking the start button. Ac contactors and thermal relays and motors; The plunger pump itself failure, inspection or replacement of the plunger pump.
(3) Main oil overflow valve failure. It may be that the damping hole is blocked and improperly adjusted, the spring is broken or the valve core is rusted and stuck. The relief valve needs to be adjusted, repaired or replaced.
(4) The slider is not parallel to tighten the handwheel of the air release valve, and the air in the balance cylinder. Fill with oil and remove air, then release the valve.
(5) Leakage of the vent valve, dismantle and check the seal of the vent valve cone, repair or replace the vent valve.
(6) the check valve has internal leakage, check the check valve cone seal, grinding cone sealing surface with line contact is better or replace the check valve.
(7) Bending machine balance cylinder piston rod head inclined iron fastening screw loose, check and firm piston rod head inclined iron firm screw.
2. Maintenance method of hydraulic bending machine
(1) the slider can not go down the electromagnetic directional valve can not be reversed. Repair or replace the housing fixing screw loose. Check and tighten the circuit; Reversing valve core stuck. Clean, grind or replace the slide valve.
(2) one-way throttle valve core stuck or closed dead maintenance and cleaning.
(3) The sliding block can only be repaired or replaced to tighten the fixing screws of the shell. The solenoid directional valve cannot be reversed. Valve core stuck. Clean grinding or replace the slide valve; No action or loosening of shell fixing screws. Check the circuit.
(4) the valve core of the hydraulic control check valve is stuck. For maintenance, the liquid control check valve cannot be opened. Clean or replace.
(5) The spring may be loose. Tighten the hand wheel of pressure relay clockwise, the pressure relay is faulty. Press the spring.
(6) Piston cylinder piston seal ring wear seriously. Replace the sealing ring.
The use of hydraulic bending machine should pay attention to what problems the use of hydraulic bending machine must be strictly in accordance with the operating procedures, with hydraulic bending machine processing matters needing attention is: pay attention to the way of processing and in a variety of positioning processing mode after the operation mode in processing, such as:
(1) bending in the mold, after the need to pull back, in order to prevent the workpiece deformation in the bending process; (2) large parts of the internal bending, due to the workpiece shape is large, and the bending area is small, so that the tool and bending area is difficult to coincide, resulting in bending workpiece positioning difficult or bending workpiece damage;
(2) In order to avoid the occurrence of the above situation, a certain point can be added in the longitudinal direction of processing, so that the positioning of the processing by two directions, so that the processing positioning is convenient, and avoid workpiece damage, this processing method improves the safety of processing, and improve the production efficiency.
(3) shape bending matters for attention is: when bending small size, we should pay attention to whether the bending die and after the regulation interference (the interference range of each tool is not the same).