As a precision machining equipment, the hydraulic system of the CNC tool grinder is the core power unit to ensure its accurate operation. Oil leakage faults not only cause waste of hydraulic oil, but also affect machining accuracy and even cause equipment shutdown. Therefore, it is crucial to accurately locate the root cause of oil leakage and take effective measures to ensure the stable operation of equipment.

The root causes of hydraulic system oil leakage faults can be divided into four categories: seal failure, pipeline damage, component wear, and improper assembly, among which seal failure is the most common cause. As a key component that isolates hydraulic oil from the external environment, seals are prone to aging, hardening, or deformation due to long-term exposure to high pressure and oil temperature fluctuations, resulting in poor sealing surface adhesion. In addition, impurities mixed in hydraulic oil can exacerbate seal scratches and further damage sealing performance. Pipeline damage is mainly caused by material fatigue or concentrated installation stress, especially at curved and joint areas. Long term vibration can cause cracks or loose joints in the pipeline.

Component wear is also a root cause that cannot be ignored. The motion pairs of core components such as hydraulic pumps and valves will experience wear and tear during long-term operation, leading to an increase in fit clearance. If they exceed the sealing compensation range, internal or external leakage may occur. Improper assembly is mainly manifested as uneven force distribution during the installation of seals, scratching of sealing surfaces, or insufficient tightening torque of joints, leaving hidden dangers for oil leakage.

Targeted measures need to be taken to address different root causes. For seal failure, the aging degree of the seal should be checked first, and high-quality seals of the appropriate model should be replaced in a timely manner. At the same time, the hydraulic oil should be filtered and impurities in the seal groove should be cleaned to ensure that the sealing surface is clean and smooth. When dealing with pipeline damage, it is necessary to replace the fatigue damaged pipeline, optimize the pipeline direction to reduce bending stress, and use torque wrenches to tighten the joints according to standards.

In the face of component wear, if the wear amount is small, the mating surface of the motion pair can be repaired by grinding; If the wear is severe, the components need to be replaced, and after replacement, a no-load test run should be conducted to check the sealing performance. For oil leakage caused by improper assembly, relevant parts need to be disassembled and reassembled according to specifications to ensure that the seals are installed in place and the joints are tightened evenly.

In addition, establishing a regular maintenance mechanism can reduce oil leakage faults from the source, including regular inspection of hydraulic oil quality, replacement of aging seals, inspection of pipeline and joint status, etc. By combining root cause analysis with precise processing, the occurrence rate of oil leakage in the hydraulic system of CNC tool grinders can be effectively reduced, ensuring equipment machining accuracy and operational stability.