Tag Archive The specific maintenance measures of CNC machine tools

The specific maintenance measures of CNC machine tools

1. CNC system

(1) Strictly abide by the operation regulations and daily maintenance system of CNC machine tools.

(2) Prevent dust from entering the numerical control device: floating dust and metal powder are easy to cause the insulation resistance between components to drop, thus causing failure or even damage to components.

(3) Clean the cooling and ventilation system of the data control cabinet regularly.

(4) Frequently monitor the power grid voltage of CNC system: the power grid voltage range is 85% – 110% of the rated value.

(5) Replace the battery for memory regularly.

(6) Maintenance of CNC system when it is not used for a long time: often power on the CNC system or make the CNC machine run warm program.

2. Tool magazine and tool change manipulator

(1) When installing the knife into the magazine manually, ensure that it is installed in place and check whether the locking on the knife seat is reliable.

(2) It is strictly prohibited to install the over weight and over long tools into the tool magazine, so as to prevent the tool from dropping when the manipulator changes the tool or the tool from colliding with the workpiece, fixture, etc.

(3) In order to select tools in sequence, it is necessary to pay attention to whether the order in which the tools are placed on the magazine is correct. Other tool selection methods should also pay attention to whether the tool number is the same as the required tool to prevent accidents caused by changing the wrong tool.

(4) Pay attention to keep the handle and sleeve clean.

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

(6) When the machine is started, the tool magazine and manipulator shall be operated empty first, and check whether all parts work normally, especially whether all travel switches and solenoid valves operate normally.

3. Ball screw

(1) Regularly check and adjust the axial clearance of screw nut pair to ensure the reverse drive accuracy and axial stiffness.

(2) Regularly check whether the connection between the lead screw support and the bed is loose and whether the support bearing is damaged. In case of any of the above problems, fasten the loose parts in time and replace the support bearing.

(3) Clean the old grease on the ball screw with lubricating grease every half a year and replace it with new grease. The ball screw lubricated with lubricating oil shall be oiled once a day before the machine tool works.

(4) Pay attention to prevent hard dust or chips from entering the lead screw protective cover and bumping the protective cover during the working process. Replace the protective device in time once it is damaged.

4. Main drive chain

(1) Adjust the tightness of the spindle drive belt regularly.

(2) Prevent all kinds of impurities from entering the oil tank, and change the lubricating oil once a year.

(3) To keep the connection between the spindle and the handle clean, it is necessary to adjust the displacement of the hydraulic cylinder and the piston in time.

(4) Adjust the counterweight in time.

5. Hydraulic system

(1) Filter or change the oil regularly.

(2) Control the temperature of the fluid in the hydraulic system.

(3) Prevent hydraulic system leakage.

(4) Check and clean the oil tank and pipeline regularly.

(5) Implement daily point inspection system.