When assembling the bearing of the CNC lathe, it is necessary to preload it, so that the original clearance will be eliminated after the bearing is installed, which means that the contact angle and accuracy of the bearing of the CNC machine tool play a very important role. Therefore, when installing the bearing, it is necessary to ensure that the contact angle is qualified, and at the same time, the actual width of the angular contact ball bearing must be ensured. It is not uncommon for bearings to fail during operation, so there is no need to make a fuss. If there is a fault, it is important to judge and deal with it.
1. The installation of CNC lathes is improperly illuminated, and brute force is used during installation, and the bearing is most harmed by hitting the bearing directly with a hammer; It is the main cause of deformation. This is very common in some small machine tool shops, where this is avoided by using professional bearing mounting tools when installing the bearings. The installation is not in place, the installation is deviated or not installed to the bearing position, resulting in the bearing clearance is too small. The inner and outer rings are not in the same center of rotation, resulting in misalignment. Choose appropriate or professional bearing installation tools, and use special instruments to test after installation.
2. Poor lubrication is one of the main reasons for premature bearing failure. The main reasons include: not filling the lubricant or oil in a timely manner; The lubricant or oil is not filled in place; Improper selection of lubricants or lubricating oils; Incorrect lubrication, etc. Choose the right lubricant or oil and use the right lubrication filling method.
3. Pollution can also lead to premature damage to the bearing, which means that there is sand, dust, metal shavings, etc. entering the bearing. The main reasons include: contamination caused by opening the bearing package too early before use; The working environment is not clean during installation, causing pollution; The working environment of the bearing is not clean, the working medium is polluted, etc. All spindle assembly of Venus machines is done in a constant temperature clean room, which avoids bearing contamination. It is best not to unpack the bearing before use; Keep the installation environment clean when the CNC lathe is installed, and clean the bearings to be used; Strengthens the sealing device of the bearing.
Fourth, fatigue failure is a common way of bearing damage. The causes of fatigue failure of common CNC lathes may be: long-term overload operation of bearings; Failure to repair in a timely manner; improper maintenance; CNC lathe aging, etc.
