INA bearing premature failure cause analysis and precautions

Source: China Bearing Network Time: 2013-01-09

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

1. Significant looseness defects are not allowed on the INA bearing ring of the product. It will reduce the density of the ferrule; enrich the interior with more micropores; low melting point impurities; gas and non-metallic inclusions. It is the same as the banded carbide; it has the effect of cutting the continuity of the matrix; the composition is segregated; the matrix is â€‹â€‹brittle; and the inductive mechanical properties of the ferrule are greatly reduced.
2. In the case of quenching and tempering, the martensite matrix is â€‹â€‹non-concentration difference; higher micro hardness value and looseness defects; it is also a potential element that induces grinding cracks. The presence of non-concentration difference indicates that there is a severe band in the original arrangement. Carbide; thus causing segregation of the carbon concentration between the belt and the belt; thus, the quenching increases the difference between the superheating tendency between the belts and the Ms point.
3. The effect of grinding quality on the premature failure of INA bearings can be judged from the above test results; grinding cracks and grinding burns on one side of the raceway are a direct cause of the cracking of the ferrule and the premature failure of the bearing. The microscopic shape of the crack and the scattering characteristics of the burned burn are clarified; the original orientation of the raceway is too biased or the R of the raceway is not round; the grinding allowance on one side of the raceway is increased; when the feed is large during the rough grinding, When the grinding speed is fast; uneven grinding occurs in the entire raceway. If the grinding wheel is not trimmed in time; it will promote the embedding or sticking of the grinding wheel to form the grinding wheel pore blockage and passivation; thus, the grinding wheel imbalance will be increased; Oscillation is aggravated; even the machine oscillates and the grinding flutter occurs. The obvious grinding force is periodically changed; the intermittent burn band is formed.
4. In order to further understand the hardness distribution of the ferrule and the micro-arrangement of the quenching and tempering and the microscopic arrangement of the surface layer; select some cracked inner ring and its fragments; set the microhardness on the end face; and use the wire cutting method to crack A longitudinal metallographic specimen is taken adjacent to the section.
INA bearing in the work; because of the influence of the external or connotation elements; the original cooperation gap is changed; the precision is reduced; even the "bite death" is called the gap modification failure. The external factors such as excessive interference; the device is not in place; The large amount of expansion caused by temperature rise, instantaneous overload, etc.; connotation elements such as residual austenite and residual stress are unstable, which are the main reasons for the failure of the play change.
1. If the bearing is outstandingly smooth; and the proper isolation of debris and moisture, the oil seal should be free of wear. However, the best way to look at the bearings and view the oil seals is when you open the bearing housing. Look at the oil seals near the bearings; to ensure they are sufficient to avoid hot liquids or corrosive liquids or gases entering the bearing along the shaft; oil seals should be replaced if they are worn.
2. High temperatures often indicate that the INA bearing is in an abnormal condition. High temperatures are also detrimental to the smoothing agent in the bearing. Sometimes the bearing overheating can be attributed to the smoothing agent of the bearing. If the bearing is operated for a long time at temperatures exceeding 125 degrees Celsius, the bearing life will be reduced.
The causes of high-temperature bearings include: lack of smoothness or smoothness of the fire, the magazine contained in the smoothing agent, the load is too large, the bearing is damaged, the gap is lacking, and the high temperature conflict occurs in the oil seal.
3. Check the condition of the running machine; monitor it; avoid posing the equipment stop.

Recommend to friends comments close window

Bearing related knowledge

China's bearing professional development situation analysis of bearing oscillation and bearing temperature bearing professor describes how to look at the cylindrical roller bearing fault protection bearing roll neck bearing process analysis super top bearing skills SKF crack success formula

This article links to http://
Please indicate the bearing network http://

Previous:The reason for the fan bearing problem and the cleaning method for you to solve problems
Next: Reasonable selection of bearings for machine tool spindles and turntables

Others Tablewares And Kitchenwares

Ceramic Plate,Soup Spoon,Coffee Spoon

Home Decoration,Tablewares And Kitchenwares,Mugs AND Cups Co., Ltd. , http://www.nsdecoration.com