The abnormal pressure of the Hydraulic Press forming Machine is a relatively common fault. There are three main points: the system has no pressure, the pressure is not adjustable, and the pressure fluctuates and is unstable. Let's take a look at the main factors and solutions that cause the four-column hydraulic press to have no pressure.
During the movement of the four-column hydraulic press, the system pressure suddenly drops to zero and cannot be adjusted. In most cases, it is the problem of the pressure regulating system itself. The factors for this failure are: whether the damping hole of the relief valve is blocked; there is foreign matter on the sealing end of the relief valve; the main core valve of the relief valve is stuck in the open position; the electromagnet of the unloading reversing valve It is burned out, the wire is broken or the electrical signal is not sent; for the proportional relief valve, it may also be the electrical control signal interruption and other factors.
When the four-column hydraulic press is restarted after being stopped for a period of time, the pressure is zero. There may be factors such as rust on the relief valve at the open position; the hydraulic pump motor is reversed; the hydraulic pump is not sucked up due to blockage of the filter or leakage of the oil suction pipe Oil.
When the four-column hydraulic press is installed, dismantled and replaced by the maintenance components, the pressure is zero. Possible factors are: the hydraulic pump is not installed tightly, and the working volume cannot be formed; the hydraulic pump is not filled with oil, and the sealing oil film cannot be formed: the reversing valve core is installed On the contrary, the reversing valve is installed reversely. If there is a U-shaped reversing valve in the system, once it is installed reversely, the system will be depressurized.
