Maintenance and maintenance of mechanical parts and auxiliary devices of CNC machine tools (3)

3. Maintenance and maintenance of machine guides

The maintenance and maintenance of the machine guide rail is mainly the lubrication of the guide rail and the protection of the guide rail.

(1), lubrication of the guide rail

The purpose of rail lubrication is to reduce frictional resistance and frictional wear to avoid creeping at low speeds and lowering the temperature rise at high temperatures. Therefore, the lubrication of the guide rail is very important. Lubricating oil is used for the sliding guide rails, and lubricating oil or grease is available for the rolling guide. The grades of lubricants commonly used in CNC machine tools are: L-AN10, 15, 32, 42, 68. The oil lubrication of the guide rail is generally automatic lubrication. We should pay attention to check the diverter valve in the automatic lubrication system during operation. If it fails, the guide rail will not be automatically lubricated. In addition, it must be done every day

Check the oil volume of the guide oil tank. If the oil quantity is not enough, you should add the oil in time. At the same time, pay attention to check whether the oil pump can start and stop regularly, and pay attention to check whether the lubricating oil can be supplied at the time of starting.

(2), the protection of the guide rail

In operation and use, care should be taken to prevent chips, abrasive particles or cutting fluid from scattering on the rail surface, otherwise the rail wear will be aggravated, scratched and rusted. To this end, pay attention to the daily inspection of the rail guard to ensure the protection of the rail.

4. Maintenance and maintenance of the rotary table

The circumferential feed motion of CNC machine tools is generally realized by the rotary table. For the machining center, the rotary table has become an indispensable component. Therefore, in operation and use, we must pay attention to the correct operation according to the requirements and operating procedures of the rotary table. Pay special attention to the lubrication of the rotary table drive mechanism and the guide rail.

The maintenance and maintenance of the auxiliary equipment of CNC machine tools mainly includes: maintenance and maintenance of CNC indexing head, automatic tool changer and hydraulic air pressure system.

1. Maintenance and maintenance of CNC indexing head

The numerical control indexing head is a common accessory for CNC milling machines and machining centers. Its function is to make the rotary indexing or continuous rotary feeding motion according to the instructions of the CNC device, so that the CNC machine tool can complete the specified machining accuracy. Therefore, in operation and use. It is necessary to pay attention to the correct operation according to the requirements and operating procedures of the numerical control indexing head.

2. Maintenance and maintenance of automatic tool changer

The automatic tool changer is a feature that distinguishes the machining center from other CNC machine tools. It has the function of automatically changing the required tools according to the processing requirements, to help the CNC machine save the auxiliary time and meet the requirements of multi-process and step processing in one installation. Therefore, in operation and use, it is necessary to check whether the operation of the mechanical structure of each component of the automatic tool changer is normal, whether there is an abnormal phenomenon, whether the lubrication is good, etc., and pay attention to the reliability and safety inspection of the tool change.

3. Maintenance and maintenance of hydraulic system

(1) Regularly inspect, filter, and replace oil in the fuel tank;

(2) Check the performance of the cooler and heater to control the oil temperature;

(3) Regularly check and replace the seals to prevent leakage of the hydraulic system;

(4) Regularly check the cleaning or replacement of hydraulic parts, filter elements, and regularly check the cleaning tank and piping;

(5) Strictly implement the daily inspection system to check whether the leakage, noise, vibration, pressure, temperature, etc. of the system are normal.

4. Maintenance and maintenance of the pneumatic system

(1) Use a suitable filter to remove impurities and moisture from the compressed air;

(2) Check the oil supply of the oil mister in the system to ensure that there is an appropriate amount of lubricating oil in the air to lubricate the pneumatic components to prevent rust, wear and tear, air leakage and component failure;

(3) Maintain the tightness of the pneumatic system and periodically check and replace the seals;

(4) Pay attention to adjusting the working pressure;

(5) Regularly check the cleaning or replacement of pneumatic components and filter elements.