What Are The Key Points for The Daily Maintenance of A Double-spindle Lathe?

The key points for the daily maintenance of a ‌ double-spindle lathe mainly include keeping it clean, regular lubrication, checking the condition of the cutting tools and spindles, monitoring the hydraulic and pneumatic systems, and conducting a shutdown inspection after processing ‌. Scientific and standardized daily maintenance can effectively ensure the accuracy of equipment, extend its service life, and prevent production losses caused by sudden malfunctions.

The following are the specific key points for daily maintenance

I. Cleaning and inspection before and after daily processing

Clean the surface and interior of the equipment ‌

After each processing is completed, use compressed air or a soft cloth to remove chips, oil stains and coolant residues from the spindle, tool rest, worktable and guide rails. Special attention should be paid to cleaning the accumulated chips inside the machine tool to prevent blocking the chip removal channels or causing overheating.

Check the protective device ‌

Confirm whether the dust cover of the guide rail and the lead screw sleeve are intact and undamaged to prevent iron filings and liquids from entering the precision components.

Ⅱ. Lubrication System: Replenish regularly and in fixed quantities

Lubrication of the main shaft, guide rails and lead screws ‌ : According to the frequency of equipment usage, check the working condition of the automatic lubrication pump daily or at each shift to ensure that a uniform oil film is formed on the surface of the guide rails and lead screws, preventing wear caused by dry friction.

Bearing lubrication ‌ : For grease-lubricated spindles, high-temperature grease should be replenished every six months (filling 1/3-1/2 of the bearing cavity); For the oil-gas lubrication system, check the oil level of the oil mist generator every day to ensure normal oil supply.

Ⅲ. Tool System: Timely replacement and tightening

Regularly inspect the wear and chipping of the cutting edge of the tool. Replace it immediately if any abnormality is found.

Check whether the tool chuck, screws and other fasteners are loose to ensure firm clamping and avoid the risk of vibration or flying out during processing.

Set the cutting parameters (such as speed and feed rate) reasonably to avoid rapid tool wear due to overload.

Iv. Spindle System: Monitor the operating status

Listen to the sound and measure the temperature ‌ : during operation, pay attention to whether there is any abnormal noise or vibration from the main shaft; Monitor the temperature of the main shaft in real time. If it exceeds 60℃, stop the machine immediately for inspection. Possible causes include excessive preload of the bearing, insufficient lubrication or cooling failure.

Accuracy verification ‌ : Regularly inspect the radial runout of the main shaft (which should be ≤0.005mm) and axial movement. If any problems are found, adjust the bearing clearance in a timely manner or carry out professional maintenance.

V. Hydraulic and Pneumatic Systems: Ensure stable operation

Check whether the hydraulic oil level is normal and whether the oil is clean to prevent insufficient clamping force or slow movement of the fixture due to oil contamination.

Monitor the oil temperature. If the oil temperature is too high, it is necessary to check whether the cooling system has failed or the pipelines are blocked.

Regularly check for any leakage at the gas line joints to ensure stable air pressure and reliable execution of actions such as tailstock movement, clamping and release.

Ⅵ. Closing operations after shutdown

After processing is completed, make sure the tool has been returned to a safe position to avoid collision with the workpiece.

Clean the workpiece and fixture, turn off the power supply, air source and hydraulic system, and keep a good handover record.