When assembling CNC machine bearings, Venus machine tools must be pre-loaded so that the original clearance will be eliminated after the bearings are installed. That is to say, the contact angle of the CNC machine bearings has a very important role in accuracy. Therefore, when mounting the bearing, it is necessary to ensure that the contact angle is qualified and that the actual width of the contact ball bearing is in conformity with the regulations. It is not uncommon for a bearing to fail in operation, so there is no need to make a fuss. There is a malfunction, and judgment and handling are key.
Here we analyze the common quality problems and reasons of CNC machine bearing.
1, use brute force during installation, hit the bearing directly with a hammer to damage the bearing Zui; It is the main cause of deformation. This is very common in some small machine tool factories. Venus machine tools use professional bearing installation tools when installing bearings, thus avoiding this.
2, installation is not in place, installation deviation or not installed to the bearing position, resulting in too small bearing clearance. The inner and outer circles are not in the same center of rotation, causing different hearts.
Recommendation: Select suitable or professional tools for bearing installation and test with special equipment after installation.
II. Poor lubrication
According to the investigation, poor lubrication is one of the main causes of premature damage of bearings. The main reasons include: failure to fill lubricants or lubricants in a timely manner; The lubricant or lubricant is not in place; Inappropriate selection of lubricants or lubricants; The lubrication method is not correct and so on.
Recommendation: Choose the right lubricant or lubricant and use the right lubrication method.
Pollution can also lead to premature damage to the bearing. Pollution refers to dust, metal chips, etc. entering the bearing interior. The main reasons include: opening the bearing packaging prematurely before use, causing pollution; Unclean working environment during installation, causing pollution; Bearing working environment is not clean, working medium pollution. All spindle assembly of Venus Machine Tool is done in the heated cleaning room, thus avoiding bearing pollution.
Suggestion: do not unpack the bearings before using Zui; Keep the installation environment clean during installation and clean the bearings to be used. Sealing device to enhance the bearing.
Fatigue failure is a common form of damage to bearings. Common reasons for fatigue failure may be: long-term overload of bearings; Late maintenance; Inadequate maintenance; Equipment aging and so on.
Quality of bearings
The quality of the bearing itself is directly related to the service life. I use all imported bearings or domestic first-line brands to avoid this problem.