In assembling the bearing of the CNC machine tool, the load should be preloaded, so the original clearance will be eliminated after the bearing is installed. Then it is very important to say that the contact angle and precision of the CNC machine tool bearing are very important. Therefore, when installing bearings, it is necessary to ensure that the contact angles are qualified, while ensuring the actual width of the angular contact ball bearings to meet the requirements. Failure of bearings during operation is a common occurrence, so there is no need to make a fuss. There is a failure, and the key is to judge and deal with it.
Next, we analyze the common quality problems and causes of CNC machine tools bearings.
1. Improper installation
1, when brute force is installed, direct bearing with hammers will cause the most damage to the bearing, which is the main reason for the deformation. This is very common in some small machine tool factories. When installing bearings, professional bearing mounting tools are used to avoid this.
2, installation is not in place, installation deviation or not installed to the bearing position, resulting in bearing clearance is too small. The inner and outer circles are not in the same rotating center, causing different concentricity.
Suggestion: choose proper or professional bearing installation tools and install them with special instruments.
Two. Poor lubrication
According to investigation, poor lubrication is one of the main reasons for premature bearing damage. The main reasons include: untimely injection of lubricants or lubricants; lubricants or lubricants not added in place; lubricants or lubricants improper selection; improper lubrication and so on.
Suggestion: choose the right lubricant or lubricating oil and use the correct way of lubricating filling.
Three. Pollution
Pollution also leads to premature damage to the bearing. Pollution means that dust and metal chips enter the bearing. The main reasons include: prematurely opening the bearing packaging before use, causing pollution, the working environment is not clean, causing pollution, the working environment of the bearing is not clean, and the working medium is polluted. All spindle assembly is done in constant temperature cleanroom, thereby avoiding bearing contamination.
Suggestion: it is best not to disassemble the packing of the bearing before use; keep the installation environment clean, clean the bearings to use, and strengthen the sealing device of the bearing.
Four. Fatigue
Fatigue damage is a common way of bearing damage. The common causes of fatigue damage may be that the bearings are overloaded over a long period of time, not timely maintenance, improper maintenance, and equipment aging.
Five, the quality of the bearing
The quality of bearing itself is directly related to the service life. Our company uses all imported bearings or domestic brand lines to avoid this problem.
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