1. Check whether the liquid valve of the hydraulic press brake mold is fully opened. If it is because of oil pollution, the spool of the liquid charging valve is inflexible and stuck, causing insufficient liquid filling. It is necessary to clean the hydraulic press brake mold filling valve and reinstall it to make the valve core flexible.
2, check whether the oil level of the mold oil tank of the bending machine is too low, and the filling port is not submerged. For the above reasons, the oil in the tank can be added to more than 5mm above the filling port so that the filling hole is completely submerged.
3, check whether the cartridge valve is stuck or the main spool is stuck, and the damping hole is blocked. If it is the above reason, please disassemble the hydraulic press brake mold relief valve to clean it, and then re-install it .
4. Whether the solenoid coil of the proportional hydraulic press brake die relief valve is energized, and whether the proportional solenoid coil voltage meets the requirements. If it is the above reason, please check the relevant electrical reasons.
