There are many reasons for the failure of hydraulic shearing machine, such as the tool rest does not work and the hydraulic system does not work, which are solved one by one below. Shear failure phenomenon 1, oil circuit can't build up pressure, and the upper tool holder can't move; 2. The return of the upper tool rest is slow or it cannot return to the top dead center, and the action sequence of the upper tool rest and the cylinder pressing is not coordinated. Shearing machine 1 Cause, the electric plug of electromagnetic reversing valve has poor contact.

2. The valve core of the electromagnetic reversing valve is stuck or brushed by sundries and does not act.

3. The sealing port of each spool of the combination valve has sundries and cannot be closed.

4. The throttle hole in the combination valve is blocked.

5, nitrogen cylinder nitrogen pressure is insufficient. Elimination method of shearing machine 1, Maintenance of electrical plug

2. Inspection, disassembly and cleaning

3. The nitrogen cylinder is inflated to improve the pressure maintenance process of the hydraulic shearing machine 1. Please ask the equipment operator to know the operation status of the hydraulic system equipment of the hydraulic shearing machine. These include: whether the hydraulic system of shearing machine works normally; Whether the hydraulic pump is abnormal; Time and results of hydraulic oil cleanliness test; Cleaning and replacement of filter elements; Whether the hydraulic components were adjusted before the fault occurred; Whether the seal has been replaced; What abnormal phenomena have occurred in the hydraulic system of shearing machine before and after the failure? What failures have occurred in the past and how to eliminate them need to be understood one by one.

2. Look at the actual working condition of the hydraulic system of the shearing machine, and observe whether there is any problem with the system pressure, speed, oil, leakage and vibration.

3. Listen to the sound of the hydraulic system of the shearing machine, such as the impact sound; Noise and abnormal sound of the pump; Judge whether the hydraulic system works normally.

4. Touch the temperature rise, vibration, crawling and the tightness of the joint to judge whether the working state of the moving parts of the hydraulic system of the shearing machine is normal.