Precautions for CNC Machine Tool Maintenance Around the Spring Festival

Shutdown Preparation : Schedule production tasks in advance to ensure that the machine tool is safely shut down before maintenance begins, and thoroughly clean the workpiece and fixtures from the table to prevent damage to these components during the maintenance process.

• Thoroughly clean the machine tool’s internal working areas, including the machining chamber, tool magazine, guideways, and lead screws. Use a brush and vacuum cleaner to remove chips and dust, ensuring that no chip debris remains.

• Check the lubricant tank level and ensure it remains within the normal range. If the oil level is too low, add lubricant that meets the machine tool’s specifications to prevent accelerated wear of moving parts due to insufficient lubrication.

• Open the electrical cabinet and use a brush and vacuum cleaner to remove dust from the electrical components, particularly circuit boards, relays, contactors, and similar parts, to prevent dust buildup that could cause short circuits or poor contacts.

• Inspect the connections of electrical components, including terminal blocks, plugs, and sockets; tighten any loose connections to ensure that all electrical connections are secure and reliable.

• Inspect electrical components for signs of overheating, discoloration, or scorching; promptly replace or repair any components exhibiting abnormalities.

• Inspect the accuracy of the guide rails and lead screws; use a dial indicator or micrometer to measure the straightness and parallelism of the guide rails, and check the axial clearance and radial runout of the lead screw. Adjust or repair any components that exceed the specified tolerance limits.

• Inspect the protective devices on the guide rails and lead screws, ensuring they are intact and effectively prevent chips and dust from entering the moving parts. If any damage is found, repair or replace the components promptly.

• Inspect the lubrication condition of the guide rails and lead screws, ensuring that lubricant or grease is evenly distributed, and replenish lubrication in areas with inadequate lubrication.

Spindle Inspection:

• Clean chips and debris from inside the tool magazine, and wipe down the tool holders and tool turret to ensure the interior remains clean and tidy.

• Inspect the tool holder clamping mechanism of the tool magazine to ensure that tools are securely fastened and to prevent them from falling out during storage.

Tool changer system inspection:

• Inspect the workshop environment where the machine tool is located, ensuring that temperature, humidity, and other environmental conditions remain within the machine tool’s specified limits to prevent environmental factors from compromising its performance and accuracy.

• Verify that the machine tool’s protective measures are intact, remove the guards, ensure there are no obstructions around the machine, and guarantee safe operation after startup.

• After connecting the power supply, allow the machine tool to undergo a warm-up run. You may execute an empty‑run program or have each axis move at a reduced speed for a period of time, enabling all components to reach their operating temperature and minimizing the impact of thermal deformation on machining accuracy.

• Perform basic machine tool operation tests, including axis movements, spindle rotation, coolant spray, tool changes, and other functions, to ensure all features are operating correctly.

• Check that the buttons, knobs, switches, and other controls on the operator panel are functioning properly, and observe the machine tool’s response during operation to ensure accuracy and responsiveness.

• Verify that the machine tool’s system parameters are set correctly; if necessary, recalibrate key parameters such as the zero point and compensation settings to ensure they meet the machining requirements.

• Inspect and adjust parameters such as tool length and radius compensation to ensure that tool compensation settings are accurate, thereby preventing machining errors.