Daily maintenance of CNC machine tools ---Mechanical Part

There are many types of CNC machine tools, and the daily maintenance work should be based on the type, model and actual use of the machine tool, and with reference to the requirements of the machine tool instruction manual, to formulate a targeted maintenance system. The following are some common and general daily maintenance points.


Maintenance of the main drive chain

Regularly adjust the tightness of the spindle drive belt to prevent the loss of rotation caused by the belt slipping; check the constant temperature oil tank lubricated by the spindle, adjust the temperature range, replenish the oil in time, and clean the filter; after long-term use of the tool clamping device in the spindle , There will be a gap, which will affect the clamping of the tool. It is necessary to adjust the displacement of the hydraulic cylinder piston in time.


Maintenance of Ball Screw Thread Pairs

Regularly check and adjust the axial clearance of the screw thread pair to ensure the reverse transmission accuracy and axial rigidity; regularly check whether the connection between the screw and the bed is loose; if the screw protection device is damaged, it should be replaced in time to prevent dust or dust. Chips enter.

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Maintenance of tool magazine and tool changing manipulator

It is strictly forbidden to put overweight and long tools into the tool magazine to avoid the tool dropping or the collision between the tool and the workpiece and the clamp when the manipulator changes the tool; often check whether the zero return position of the tool magazine is correct, and check the position of the machine tool spindle return tool change point Check whether it is in place, and adjust it in time; when starting up, the tool magazine and the manipulator should be idling to check whether all parts work normally, especially whether the travel switches and solenoid valves can operate normally; check whether the tool is securely locked on the manipulator, and find Abnormal should be dealt with in time.


Hydraulic and pneumatic system maintenance

Regularly clean or replace the filters or sub-screens of each lubrication, hydraulic and air pressure system; regularly conduct oil testing and inspection of the hydraulic system and replace the hydraulic oil; regularly drain the water separation and air filter of the air pressure system;


Maintenance of Machine Tool Accuracy

Periodically check and correct machine level and mechanical accuracy. There are two kinds of correction methods for mechanical accuracy: soft and hard. The soft method is mainly compensated by system parameters, such as lead screw backlash compensation, fixed point compensation of each coordinate positioning accuracy, machine tool returning to the reference point position correction, etc.; Screw nut pair preload to adjust backlash

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