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What is the reason for the failure of the hydraulic control of the single-column hydraulic press

by:WORLD     2022-11-09
Single-column hydraulic presses will have hydraulic control failures in daily production. It is extremely important to find the reasons and eliminate them in time. This paper analyzes the reasons for the failure of the hydraulic control of the single-column hydraulic press and proposes solutions.










1. Check whether the control piston of the single-column hydraulic press is stuck on the valve body hole due to burrs or dirt. After the blockage, the control piston cannot make the one-way valve work normally, resulting in the failure of the hydraulic control of the single-column hydraulic press. At this point, grind the burrs or regrind the control piston.





2. If the single-column hydraulic press is an externally drained hydraulic control check valve, check whether the oil discharge hole is blocked by dirt, and whether there is an oil discharge hole on the installation plate during design, so that the pressure control oil cannot push the control piston, and the check valve does not work. Open.





3. Check whether the control hydraulic pressure of the single-column hydraulic press is too low: compared with the Y-type pilot check valve, the control pressure is 30%-40% of the main circuit pressure, and the control pressure generally cannot be lower than the 1.8M valve, and the control pressure must be within the rated value. More than 60% of work pressure. Otherwise, the pilot will not work properly, and the pilot check valve may not work properly.





When the control piston of the single-column hydraulic press is worn out and the internal leakage is large, the control pressure oil leaks to the oil port in large quantities. When the control pressure is insufficient, the outflow pilot check valve will flow out, the piston will be inclined, and the afterburner cannot move flexibly. invalid.





At this time, the problem of leakage and force can be solved by reconfiguring the control piston of the single-column hydraulic press.












Other faults:

Errors caused by pressure and flow adjustment of hydraulic pumps, oil motors, sequence valves, directional valves, relief valves, unloading valves, and balance valves of single-column hydraulic presses.

The sealing parts of the hydraulic equipment that are not adjusted properly are damaged, or the hydraulic equipment that cannot work normally due to foreign matter is worn or damaged, for example, the valve equipment cannot be sealed, the spring cannot function, the clearance is too large, too small, etc.

The electrical control mechanism of the single-column hydraulic press cannot function, for example, the relay cannot function, the button is poorly contacted or damaged, and the electromagnet is poorly installed.

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