As we all know, in the development of manufacturing industry, Full Automatic Hydraulic Machine has played an irreplaceable role. Due to the complexity and diversity of the machine tool itself, the machine tool failure is affected by many factors such as mechanical, electrical, control system and detection device, and the reasons for the same kind of failure may also be diverse.

And the fault shutdown directly affects the utilization rate of equipment and the production and manufacturing capacity of the industry, so on the basis of understanding the working principle, summarize and analyze the fault diagnosis method, and fundamentally find the way to quickly eliminate the fault is particularly necessary.

Fault diagnosis is the only way to carry out the machine tool fault maintenance, it can not only quickly identify the cause of the fault, eliminate the fault, but also can play a role in preventing the occurrence and expansion of the fault. In general, the fault diagnosis methods of Full Automatic Hydraulic Machine mainly include the following:

1. Conventional diagnosis

Routine inspection of the mechanical, electrical, hydraulic and other parts of the machine tool usually includes:

1. Check whether the specifications of the power supply (including voltage, frequency, phase sequence, capacity, etc.) meet the requirements;

2, CNC, servo drive, spindle drive, motor, input/output signal connection is correct and reliable;

3. Whether the printed circuit board in the CNC, servo drive and other devices is firmly installed, and whether the connecting part is loose;

4, CNC, servo drive, spindle drive and other parts of the setting end, potentiometer setting, adjustment is correct;

5, hydraulic, pneumatic, lubricating parts of the oil pressure, air pressure, etc. meet the requirements of the machine;

6, electrical components, mechanical parts have obvious damage.

Second, state diagnosis method

The fault cause can be determined by monitoring the working state of the actuator. In the Full Automatic Hydraulic Machine, the dynamic and static detection of the main parameters of the servo feed system, the spindle drive system, the power module and other components, as well as the status of all the input and output signals of the numerical control system, including internal relays, timers, etc., can also be checked by the diagnostic parameters of the numerical control system.

3. Motion diagnosis

By observing and monitoring the actual operation of the machine tool, the bad parts of the operation are judged, and the fault source is traced accordingly.

Fourth, system self-diagnosis method

This is a diagnostic method to self-diagnose and test the key hardware of the system and the control software of the system by using the internal self-diagnosis program of the Full Automatic Hydraulic Machine system or special diagnostic software. It mainly includes three aspects: startup self-diagnosis, online monitoring and offline testing.

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