Quality Identification and Failure Reasons of INA Imported Bearings

wallpapers Robot Tech 2021-03-15
Quality identification
Observing the appearance of the German INA bearing, it is not that the bearing is bright, but the quality is good. The brightness of the bearing should be black and bright. The reason for this black bright is whether the steel used in the bearing is qualified, its grinding process and the cutting used. Liquid and so on.
Whether the chamfer is bright or not, the chamfer of the imported bearing does not determine the quality of the bearing, but it reflects the processing method of the bearing. The chamfer is black, which means that the hardness of the bearing is added after quenching and other heat treatment. Some people think that the black chamfer is not good-looking because it has not been processed thoroughly. This is a misunderstanding.
A one-piece cage is better than a two-body. Although the new technology uses a one-piece cage, it only saves data, and the function of reversal is worse than two-body. The service life of imported bearings is related to 3 factors:
1. The quality of the bearing itself
2. Operating environment
3. Installation method.
These changes will be effective for the function of INA bearing damage, which depends on the detailed application of bearing requirements. The track may be irregularly distributed, or it may be evenly distributed in corresponding directions. If there are multiple loads kept rotating, then they will be evenly distributed throughout the raceway. Deformation will cause vibration and noise of imported bearings, and add conflict. May add internal voids, or change some of the harmonies between them.
In order to meet the above needs, it is necessary to ensure that no permanent deformation occurs or as long as it is within a very limited range, the selection of German INA bearings should have a sufficiently high static load ability: high reliability, quiet operation, non-oscillation operation, bearing conflicts Torque constant, conflict under low load starting point. According to static load-bearing ability, choose the big one. This safety factor represents the relationship between a fundamental static additional load C0 and the equivalent static load-bearing P0.
Reason for failure
The failure of INA bearings is due to the two primary shortcomings and the overload factor. The most common is the damage and overload fracture of the ultimate strength parts whose external load exceeds the data.
Overload is the primary cause of improper installation or sudden host failure. Under normal circumstances, the shortcomings of microcracks, shrinkage holes, bubbles, large foreign bodies, burns and other local arrangements and severe impact or sensational overload and overheating of imported bearing parts will lead to the shortcomings of fractures, which we call shortcomings fractures. We need to influence the production process, further control the quality of casting and heat treatment, and process control equipment to be able to correctly analyze the existence of these shortcomings. It is necessary to strengthen the control.