Vertical machining centre is a kind of highly sophisticated mechanical equipment, which plays an important role in modern manufacturing. In order to ensure the normal operation and long-term stability of the vertical machining centre, regular maintenance is essential. This article will introduce in detail the regular inspection and maintenance points of the vertical machining centre, including the inspection and replacement of the DC motor brush, the replacement of memory batteries, the long-term maintenance of the numerical control system, and the maintenance of the backup circuit board.
I. Regular inspection and replacement of DC motor electric brush
DC motor brush is one of the key components in the vertical machining centre. Its excessive wear will have a negative impact on the performance of the motor, and may even cause motor damage.
The DC motor brush of the vertical machining centre should be checked once a year. When checking, you should pay attention to the wear and tear of the brush. If you find that the brush is seriously worn, you should replace it in time. After replacing the brush, in order to make the brush surface fit well with the surface of the commutator, it is necessary to make the motor run in the air for a period of time.
The condition of the brush has an important impact on the performance and life of the motor. Excessive wear and tear of the electric brush may cause the following problems:
The output power of the motor decreases, which affects the processing efficiency.
Generate too much heat and increase the loss of the motor.
Poor reversal direction leads to motor failure.
Regular inspection and replacement of the brush can effectively avoid these problems and ensure the normal operation of the motor.
II. Regular replacement of memory batteries
The memory of the vertical machining centre usually uses CMOS RAM devices. In order to maintain the stored content during the period when the numerical control system is not powered on, there is a rechargeable battery maintenance circuit inside.
Even if the battery has not failed, the battery should be replaced once a year to ensure that the system works properly. The main function of the battery is to provide power to the memory when the power is disconnected and maintain the stored parameters and data.
When replacing the battery, you need to pay attention to the following points:
Battery replacement should be carried out under the power supply of the numerical control system to avoid the loss of storage parameters.
After replacing the battery, you should check whether the parameters in the memory are complete, and if necessary, you can re-enter the parameters.
The normal operation of the battery is crucial to the stability of the numerical control system. If the battery fails, it may cause the following problems:
The loss of storage parameters affects the normal operation of the machine tool.
You need to re-enter the parameters to increase the operation time and difficulty.
III. Long-term maintenance of numerical control system
In order to improve the utilisation rate of the numerical control system and reduce failures, the vertical machining centre should be used at full capacity instead of being idle for a long time. However, for some reasons, the numerical control system may be idle for a long time. In this case, you need to pay attention to the following maintenance points:
The numerical control system should be powered up frequently, especially during the rainy season when the ambient temperature is high.
Under the condition that the machine tool is locked (the servo motor does not rotate), let the CNC system run in air, and use the heating of the electrical parts themselves to dispel the moisture in the CNC system to ensure the stable and reliable performance of electronic devices.
Frequent electricity can bring the following benefits:
Prevent the damage of moisture to electronic devices.
Maintain the stability of the system and reduce the failure rate.
If the feed shaft and spindle of the CNC machine tool are driven by a DC motor, the brush should be removed from the DC motor to avoid corrosion of the commutator due to chemical corrosion, causing the commutation performance to deteriorate, and even the whole motor to be damaged.
IV. Maintenance of backup circuit boards
The printed circuit board is not prone to failure for a long time, so the purchased backup circuit board should be regularly installed in the numerical control system and powered up for a period of time to prevent damage.
The maintenance of the backup circuit board is of great significance to the reliability of the vertical machining centre. The following are some key points for maintaining the backup circuit board:
Regularly install the backup circuit board into the numerical control system and run it on power.
After running for a period of time, check the working status of the circuit board.
Ensure that the circuit board is in a dry and ventilated environment during storage.
To sum up, the regular maintenance of the vertical machining centre is essential to ensure the normal operation and long-term stability of the equipment. By regularly checking and replacing DC motor brushes and memory batteries, as well as proper maintenance and backup circuit board maintenance when the CNC system is not in use for a long time, it can effectively improve the utilisation rate of the CNC system and reduce the occurrence of failure. Operators should operate in strict accordance with the maintenance requirements to ensure the performance and accuracy of the vertical machining centre.