The key to the maintenance of CNC machine tools is to strengthen daily maintenance. The main maintenance work has the following contents:
Daily inspection:
The main projects include hydraulic system, spindle lubrication system, guide rail lubrication system, cooling system, pressure system. Daily inspection is based on the normal condition of the system to be detected.
Weekly inspection:
Its main items include machine tool parts and spindle lubrication system, which should be checked correctly every week, especially for machine tool parts to remove iron scraps and clean external debris.
Monthly inspection:
Mainly to check the power supply and air dryer. The power supply voltage should be measured and adjusted if the rated voltage is abnormal under normal conditions. Air dryers should be removed once a month and then cleaned and assembled.
Seasonal inspection：
Mainly from the machine bed, hydraulic system, spindle lubrication system three aspects of the inspection. For example, to check the machine bed, mainly to see whether the accuracy of the machine tool, the level of the machine tool meets the requirements in the manual, if there is a problem, should immediately contact the mechanic.
Semi-annual inspection:
After half a year, the hydraulic system of the machine tool, the spindle lubrication system and the X-axis should be checked. If there is any problem, new oil should be replaced and cleaned.
Maintenance of numerical control system when it is not used for a long time.
For some reason, when the numerical control system is idle for a long time, in order to avoid damage to the numerical control system, it is necessary to pay attention to the following two points:
(1) We should often energize the numerical control system, especially in the season when the environmental humidity is larger. In the case of the machine tool locked, the numerical control system should run empty.
Using the heat of the electrical components themselves to disperse the moisture in the numerical control system, to ensure the stable and reliable performance of the electronic devices, practice has proved that in the area of high air humidity, often electrify is an effective measure to reduce the failure rate.
(2) CNC machine tools using DC feed servo drive and DC spindle servo drive, the brush should be taken out from the DC motor, so as not to corrosion the surface of the commutator due to chemical corrosion, resulting in the deterioration of the commutation performance, or even damage the whole motor.
