Section 7 Routine maintenance and upkeep of CNC lathes – CNC turning programming
There is a CNC lathe whose guide rails are worn and failed. Repairing it often costs as much as 35,000 yuan. However, the daily maintenance work in most workshops now only remains in the traditional state of repairing equipment after it breaks down.
They completely rely on the operator's feel and the rich experience accumulated in the past for operation and maintenance. This approach simply cannot beat the natural wear cycle of the equipment.
Daily inspection of guide rails and sliders
Before starting the equipment every day, users need to slide one hand along the surface of the guide rail to carefully check whether there are foreign objects such as chips or abnormal protrusions. Once debris is found during the inspection, a copper brush should be used to clean it immediately. At this time, it is absolutely forbidden to use iron tools to scratch the guide rail.
Whether the oil mist on the slider is uniform and whether the liquid level in the oil cup exceeds one-third is a key factor that directly determines the service life of the guide rail. It is recommended to record it on the inspection form every shift.
Spindle taper hole and broach
Every month, use a magnifying glass to check whether there are scratches on the inner wall of the spindle taper hole. If you find fatigue deformation in the broach spring blade, replace it immediately. Do not wait until you find the deflection when installing the tool.
Iron filings will accumulate inside the broach hole. This situation will cause the tool to jump and the roundness of the machined hole diameter to exceed the allowable error range. When cleaning, you should use a suede cloth dipped in a small amount of kerosene to operate. Never use compressed air to purge.
Coolant and filter
The concentration of the coolant should be measured with a refractometer <1> once a week . If the concentration is found to be less than 8%, concentrate needs to be added. In summer, microorganisms reproduce very quickly. If not replenished, the inside of the system will emit an unpleasant stench due to fermentation.
The filter needs to be removed and cleaned every month. Once it is clogged, the flow rate will decrease. At the same time, the cutting temperature will increase, which will directly reduce the life of the tool by about half. After cleaning, wipe the water dry and then install it back and tighten the screws.
Hydraulic oil station and pipeline
Once the oil temperature exceeds fifty-five degrees, you must first check the cooling fan and cooler. If it is found that the oil level is lower than the specified lower limit, then the same type of oil must be replenished on the same day, because if different brands of oil are mixed in, sediment will precipitate.
The pipe joints must be disassembled every six months to check the gasket. If you find any oil leakage, wipe it with a white cloth. After two hours, go back and see if the cloth has become wet again. This way you can quickly find the leakage point.
Electrical cabinets and drag chain cables
Open the cabinet door once a month and use a soft brush to clean the dust on the fan filter. When the temperature inside the cabinet exceeds 40 degrees, you need to focus on checking whether the heat sink of the inverter is blocked.
The cables in the drag chain must be inspected every six months. If it is found that the outer skin is worn out and there are copper wires exposed, the entire bundle of cables must be replaced. If only one of them is replaced, the result will be that sooner or later it will be disconnected at the bend.
When doing maintenance in your workshop, do you rely on your feelings or use a checklist to check off items one by one? Tell us in the comment area how you arrange pre-class inspections. If you find it useful, give it a like and forward it to the class leader.
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