In the assembly of CNC machine tool bearings, HAISEN machine tools have to be preloaded, so that the original clearance after bearing installation will be eliminated, that is to say, CNC machine tool bearing contact Angle and precision has a very important role.Therefore, when installing bearings, it is necessary to ensure that the contact Angle is qualified and that the actual width of angular contact ball bearings conforms to the provisions.It is common for bearings to break down during operation, so it is not a big deal.Fault occurs, judgment and handling is the key.Below we analyze, CNC machine bearings common quality problems and reasons.
1. Improper installation
First,Brute force is used during installation, and the bearing will suffer the most damage when directly hit with a hammer;Is the main cause of deformation.This is very common in some small machine tool factories, jinxing machine tool in the installation of bearings using professional bearing installation tools, thus avoiding this point.
Second, the installation is not in place, the installation deviation or not installed to the bearing position, resulting in the bearing clearance is too small.The inner and outer circles are not at the same center of rotation, resulting in different centers.
Suggestion: select appropriate or professional bearing installation tools and use special instruments to test after installation.
2. Poor lubrication
According to the investigation, poor lubrication is one of the main causes of premature bearing damage.The main reasons include: not timely filling lubricant or lubricating oil;Lubricants or lubricants not in place;Improper selection of lubricants or lubricants;Incorrect lubrication and so on.
Suggestion: choose the correct lubricant or lubricant, use the correct lubrication filling way.
Pollution can also lead to premature damage of the bearing, pollution refers to dust, metal chips and so on into the bearing internal.The main reasons include: premature opening of bearing packaging before use, resulting in pollution;When installing, the working environment is not clean, causing pollution;The working environment of bearing is not clean and the working medium is polluted.All spindle assembly of jinxing machine tool is completed in a thermostatic cleaning room, thus avoiding bearing contamination.
Suggestion: it is better not to unpack the bearing before use;During installation, keep the installation environment clean and clean the bearings to be used;Strengthen the sealing device of the bearing.
Fatigue failure is a common way of bearing damage.The common reasons of fatigue damage may be: long-term overload bearing operation;Not timely maintenance;Improper maintenance;Equipment aging, etc.
5. Quality of bearing
Bearing quality is directly related to the service life, I plant all use imported bearings or domestic first-line brands, so as to avoid this problem.