FAG automotive bearings use check and maintenance points during operation

The inspection of the automotive bearings during operation is very important and cannot be ignored. It mainly checks the rolling sound, vibration, temperature, lubrication status of the bearings and so on. Let us briefly introduce the rolling sound of FAG bearings. The size of the rolling sound and the sound quality should be checked by the sounder to check the running car bearings. The advanced tools will accurately determine the problem. Bearings Even with slight peeling and other damage, abnormal sounds and irregular sounds are emitted, which can be distinguished by the sounder.
    Then the vibration of the car bearing is checked to see if the damage of the bearing is very sensitive. Whether it is peeling, indentation, rust, crack, wear, etc. will be reflected in the vibration measurement of the FAG bearing. Therefore, by using a special automotive bearing vibration measuring device (frequency The analyzer can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred by the frequency division. However, the value measured by each machine differs depending on the conditions of use of the bearing or the mounting position of the sensor. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard.
1. When using the car bearing, connect the surrounding environment cleanly, do not stick sweat and dirt. It is delineated by the staff who know the bearing, and it is especially necessary to be careful about acid, indentation, damage, etc. In order to ensure the function of the bearing, the FAG bearing should be protected, nursed and inspected according to the equipment's homework scale. The form includes monitoring the operation status, making up the smoothing agent, and checking the assembly on schedule.
2, bearings should not be stored directly on the ground (need to be more than 30cm off the ground) to prevent direct light and cold walls. In order to prevent rust, it is stored in an environment with a temperature of about 20 ° C and a humidity of 65%. The car bearings are arranged in an acidic atmosphere, which is prone to rust and discoloration. Gloves and kapok are used to wipe the bearings, shafts, and outer casings. The external and common sectors of FAG bearings are the cause of anomalies, and are necessary to be meticulous.
3, bearing measurement deviation, should be 10% of the public service as follows. The general measurement deviation value is 10% to 33%, and with the progress of the public service grade, the greater the proportion of deviation, that is, the smaller the public service, the higher the proportion of deviation, and the public service of the automobile bearing Above IT5, it is difficult to reach 10%. Measuring deviations not only means that the inspection of public service can be relaxed by 10%, but to give a certain safety margin to ensure that the user accepts the pass according to the scale.
4. Before the vehicle bearings are inspected, they must be arranged in a metal plate in the inspection occasion with the gauge block, the scale member and the measuring instrument used for the inspection. If the temperature of the objects is allowed to be uniform and room temperature is allowed to be faster. Bearings that have been dried or dried should be dripped into the smooth oil and immediately entrusted for inspection. At this time, there is no oil film shelter outside the FAG bearing. In all the inspection processes, the skin should not be directly hit and the operator should wear it. Clean gloves, or apply anti-rust agent on the hand, but it is necessary to prevent the anti-rust agent on the hand from mixing into the rotation of the car bearing, otherwise the measurement result will be faulty.

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Lubrication points during IKO stainless steel bearing operation

If two incompatible fats are mixed, never mix incompatible greases. Usually the consistency will be soft, and finally the damage will be caused by the loss of grease. If you don't know the grease that IKO bearings used, first remove all the original grease and then add a grease to lubricate.
We often encounter such situations in the process of using stainless steel. How are these situations formed? How to solve them when they are formed has always been the biggest headache for the technicians of major enterprises. The cause and solution of the phenomenon of overheating during use will be introduced in detail: the instantaneous high temperature in the grinding zone can be heated to a temperature higher than the tempering heating temperature of the workpiece at a certain depth (10 to 100 nm). In the case where the austenitizing temperature is not reached, as the temperature to be heated is increased, the surface layer will be re-tempered or high-temperature tempered in accordance with the heating temperature, and the hardness will also decrease. The higher the heating temperature, the more the hardness decreases.
In the grinding process, the grinding wheel and the workpiece contact area consume a large amount of energy, generating a large amount of grinding heat, resulting in local instantaneous high temperature in the grinding zone. Using the linear heat transfer heat transfer theoretical formula to derive, calculate or apply the infrared temperature and thermocouple method to measure the instantaneous temperature under experimental conditions, it can be found that the instantaneous temperature in the grinding zone can be as high as 1000-1500 °C in 0.1-0.001 ms. Such instantaneous high temperature is sufficient to cause high temperature oxidation, amorphous structure, high temperature tempering, secondary quenching, and even burn cracking of the surface layer at a certain depth on the working surface.
The surface of the steel under transient high temperature acts on the oxygen in the air and rises into a very thin (20-30 nm) thin layer of iron oxide. It is worth noting that the thickness of the oxide layer is corresponding to the test results of the total thickness of the surface-grinding metamorphic layer. This shows that the thickness of the oxide layer is directly related to the grinding process and is an important indicator of the quality of the grinding.
The grease used in IKO bearings has rust resistance. The performance of rust prevention is mainly based on the solubility of oil, different viscosity and grease formed by different materials, with different levels of anti-volume and anti-rust properties. Generally speaking, the viscosity is large and the fat solubility is poor. The grease is more waterproof. Even if the grease is filled with water in the stainless steel bearing cavity, it can form a layer of oil film that can resist the appearance of the steel. Because of the low rotation speed of the bicycle, the choice of grease can be relatively high, but the water resistance is very strong. Because the bicycle is often used in car wash, rain, and off-road, it is very important to deal with water, even if it is The slightly viscous grease will not affect the smoothness under low rotation, and once the surface is oxidized, the entire peeling process and aging process will be rapidly intensified.

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