Daily maintenance tips in CNC machining

Purpose: In order to better maintain the equipment of the CNC processing plant, summarize the knowledge of corresponding maintenance operations, so as to implement daily maintenance, ensure the accuracy and stability of the equipment, prolong the service life of the equipment, and ensure safe production.

1. Daily maintenance

1. Check the lubricating oil level to ensure the lubrication of the machine tool. It is recommended to use T68# guide oil.

2. Check whether the coolant in the coolant tank is sufficient, and it is not enough to be added in time.

3. Check the oil level of the pneumatic triplet, which is about 2/3 of the height of the entire oil pipe. The water vapor in the pneumatic triple oil filter tank is discharged from the drain switch every day.

4. Check the air pressure, loosen the adjustment knob, adjust the pressure according to the principle of right-handed pressure increase and left-handed decompression, generally set to 5 ~ 7KG/CM2. The pressure switch is usually set to 5KG/CM2. When the pressure is lower than 5KG/CM2, the alarm will appear, and the system will display a “LOWAIRPRESSURE” alarm. After the pressure rises, the alarm message will disappear.

5. Check whether the air blowing in the inner taper hole of the spindle is normal, wipe the inner taper hole of the spindle with a clean cotton cloth, and spray light oil on it.

6. Clean the tool magazine arms and tools, especially the tool claws.

7. Clean exposed switches and bumps.

8. Remove the cutting and oil stains on the workbench, inside the machine tool, and on the three-axis telescopic shield.

9. Check whether all signal lights and abnormal warning lights are normal.

10. Check whether there is leakage in the oil pressure unit pipe.

11. After the daily work of the machine tool is completed, the cleaning work should be carried out.

12. Keep the environment around the machine clean and tidy.

2. Weekly maintenance of processing plant

1. Clean the air filter screen of the heat exchanger, the filter screen of the cooling pump and the lubricating oil pump.

2. Check whether the tool pull bolt is loose and the knife handle is clean.

3. Check whether the three-axis mechanical origin is offset.

4. Check whether the movement of the tool changer arm of the tool magazine or the rotation of the tool magazine of the tool magazine is smooth.

5. If there is an oil cooler, check the oil cooler oil. If it is lower than the scale line, please add oil cooler oil in time. It is recommended to use 10# spindle oil.

6. Check the set temperature of the oil cooler, it is recommended to set it between 26-28 degrees.

Third, the processing plant maintenance monthly maintenance

1. Detect the lubrication of the X, Y, Z three-axis rail, and ensure that the rail surface is well lubricated.

2. Check and clean switches and bumps.

3. Check whether the oil in the oil cup of the knife cylinder is sufficient, and if it is insufficient, add it in time.

4. Check whether the signs and warning nameplates on the machine are clear and exist.

4. Semi-annual maintenance of the processing plant

1. Disassemble the three-axis anti-chip guard, clean the three-axis oil pipe joint, ball lead screw, and three-axis limit switch, and check whether it is normal. Check whether the effect of the hard rail wiper blades of each axis is good.

2. Check whether the servo motor and head of each axis are running normally and whether there is any abnormal sound.

3. Replace the oil of the hydraulic unit and the oil of the deceleration mechanism of the tool magazine.

4. Test the clearance of each axis, and adjust the compensation amount if necessary.

5. Clean the dust in the electric box (make sure the machine tool is turned off).

6. Check whether the contacts, connectors, sockets and switches are normal.

7. Check and adjust the mechanical level.

Five, processing plant maintenance annual maintenance

1. Check whether all keys are sensitive and normal.

2. Clean the cutting water tank and replace the cutting fluid.

3. Check the vertical accuracy of each axis and decide whether it needs to be adjusted.

Six, processing plant maintenance

Note: The maintenance of the processing plant should be carried out by professional engineers.

1. The grounding protection system should have good continuity to ensure personal safety.

2. Regularly check the components such as circuit breakers, contactors, single-phase or three-phase arc extinguishers. If the wiring is loose or the noise is too loud, find out the reasons and eliminate hidden dangers.

3. Ensure that the cooling fan in the electric cabinet operates normally, otherwise it may cause damage to the vital components.

4. The fuse is blown and the air switch trips frequently. The reason should be found out and eliminated in time.

5. The servo drive battery is replaced, and the system data is maintained by the servo drive battery. When the battery voltage is too low (warning 9F), the drive battery needs to be replaced. Please order the same type of battery unit as soon as possible, and keep the drive power on. . Please turn on the power of the drive unit 30 minutes before replacing the battery, and complete the battery replacement within 1 hour.