In the field of material mechanical property testing, fatigue testing equipment is a specialized device for assessing the fatigue resistance and wear resistance of materials, providing data support for industrial material quality verification. Electro-hydraulic servo fatigue testing machines, relying on the electro-hydraulic servo principle, complete reciprocating fatigue testing and are widely used for the lifespan testing of metals and composite materials. Timely troubleshooting of equipment operational hazards can effectively ensure the operational stability of electro-hydraulic servo fatigue testing machines, ensuring accurate and reliable testing data.
1. Fluctuation in loading force value
During the equipment testing process, the force value data frequently fluctuates and is difficult to stabilize, which is often caused by air ingress into the hydraulic oil circuit and impurities contaminating the servo valve. It is necessary to shut down the machine to exhaust the hydraulic system, clean the impurities from the servo valve core, check the sealing status of the oil circuit, fine-tune the servo parameters, and conduct the test again after the system operating conditions stabilize.
2. Sample clamping slips
During testing, the test sample exhibited displacement and slippage, making it impossible to fix and position. This was primarily caused by wear on the contact surface of the fixture and insufficient clamping force. The solution is to clean the dirt on the occlusal surface of the fixture, polish and repair the worn areas, adjust the clamping spacing according to the sample specifications, and uniformly tighten the fixture to avoid test slippage.
3. Rapid increase in oil temperature
After the equipment has been operating continuously, the temperature of the hydraulic oil rises abnormally, which is often caused by excessive impurities in the hydraulic oil or blockage in the cooling system. It is necessary to promptly replace the hydraulic oil with qualified one, clean the dust and oil stains on the surface of the radiator, check the operating status of the cooling fan, ensure smooth cooling, and control the oil temperature within the normal range.
4. Displacement feedback anomaly
The deviation in equipment motion stroke and the lag in displacement data feedback are generally caused by dust accumulation on the displacement sensor and calibration failure. Clean the sensing part of the sensor, re-calibrate the displacement parameters, check the connection status of the sensor circuit, tighten loose interfaces, and restore the accurate data feedback function.
5. Abnormal noise during equipment operation
During the testing process, regular or irregular abnormal noises from the machine body may originate from vibrations in the hydraulic pipeline, bearing wear, or unstable oil pressure. It is necessary to inspect the pipeline fixation, reinforce any loose pipelines, check the wear status of transmission components, replenish lubricating grease as appropriate, adjust the system operating pressure, and eliminate the abnormal noises.
6. Program runs sluggishly
The sluggish refreshing of control system parameters and the stuttering of test procedures are often caused by system cache accumulation and line signal interference. Restarting the equipment to reset the control system, clearing interference sources around the equipment, checking signal lines, and regularly maintaining system programs can ensure smooth operation of the test process.
2026-06-08
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