Precautions for CNC machine tools

Maintenance of CNC system

1. Strictly abide by the operating procedures and daily maintenance system

2. Prevent dust from entering the numerical control device: Floating dust and metal powder can easily cause the insulation resistance between components to decrease, leading to failure or even damage to the components.

3. Regularly clean the cooling and ventilation system of the CNC cabinet

4. Frequently monitor the grid voltage of the numerical control system: the grid voltage range is 85%~110% of the rated value.

5. Regularly replace the storage battery

6. Maintenance of the numerical control system when it is not in use for a long time: often power on the numerical control system or allow the numerical control machine tool to run a warm machine program.

7. Maintenance of spare circuit board Maintenance of mechanical parts

Maintenance of mechanical parts

1. Maintenance of tool magazine and tool change manipulator

1) When manually loading the tool into the tool magazine, ensure that it is in place and check whether the locking on the tool holder is reliable;

2) It is strictly forbidden to load overweight and overlong tools into the tool magazine to prevent the tool from being dropped when the robot is changing the tool or the tool colliding with the workpiece, fixture, etc.;

3) When using sequential tool selection, pay attention to whether the order of tools placed on the magazine is correct. Other tool selection methods should also pay attention to whether the number of the tool to be changed is consistent with the required tool to prevent accidents caused by changing the wrong tool;

4) Pay attention to keep the knife handle and knife sleeve clean;

5) Always check whether the zero return position of the tool magazine is correct, check whether the position of the machine spindle return tool point is in place, and adjust it in time, otherwise the tool change action cannot be completed;

6) When starting up, the tool magazine and manipulator should be run dry first to check whether each part works normally, especially whether each travel switch and solenoid valve can operate normally.

2. Maintenance of ball screw pair

1) Regularly check and adjust the axial clearance of the screw nut pair to ensure the accuracy of the reverse transmission and the axial rigidity;

2) Regularly check whether the connection between the screw support and the bed is loose and whether the support bearing is damaged. If there are any of the above problems, tighten the loose parts in time and replace the support bearings;

3) For ball screws with grease, clean the old grease on the screw every six months and replace with new grease. Ball screw lubricated with lubricating oil, add oil once a day before the machine tool works;

4) Take care to prevent hard dust or chips from entering the screw guard and hitting the guard during work. If the guard is damaged, it should be replaced in time.

3. Maintenance of the main drive chain

1) Regularly adjust the tightness of the spindle drive belt;

2) Prevent all kinds of impurities from entering the fuel tank. Change the lubricating oil once a year;

3) Keep the connecting part of the spindle and the tool holder clean. It is necessary to adjust the displacement of the hydraulic cylinder and piston in time;

4) Adjust the counterweight in time.

4. Hydraulic system maintenance

1) Regularly filter or replace the oil;

2) Control the temperature of the oil in the hydraulic system;

3) Prevent leakage of hydraulic system;

4) Regularly check and clean the fuel tank and pipeline;

5) Implement the daily point inspection system.

5. Maintenance of pneumatic system

1) Remove impurities and moisture from compressed air;

2) Check the oil supply of the lubricator in the system;

3) Maintain the tightness of the system;

4) Pay attention to adjusting the working pressure;

5) Clean or replace pneumatic components and filter elements;