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INA thin-walled bearings in the production of parts in the process of "gate critical inventory"
Source: China Bearing Network Time: 2013-04-09
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If there is intermittent noise; then pass through. If a sharp voice is announced; voices and other irregular movements; often leaks reflect the bearing in a bad transition.
For heavy loads, it should be selected with a small penetration of smooth grease under high pressure, except for a small penetration; it also has a high oil film strength and extreme pressure function. When selecting smooth grease according to environmental conditions; calcium-based smooth fat is not easy to dissolve In water; suitable for dry and low moisture environment. INA bearing commonly used smooth grease is calcium-based smooth fat, calcium sodium-based smooth fat, sodium-based smooth fat, lithium-based smooth fat, aluminum-based smooth fat and molybdenum disulfide smooth Grease, etc. The amount of smooth grease filled in the bearing; suitable for 1/2-1/3 of the inner space of the bearing. It should be reduced to 1/3 of the smooth grease at high speed to increase the temperature rise.
INA bearing parts are in the production process; they have to go through many cold and hot processing steps; in order to satisfy the demand of large quantities, high efficiency and high quality; thin-walled bearing steels should have outstanding processing functions. For example; cold and hot forming functions; Cutting processing function; hardenability and so on.
The bearing is a fine mechanical support component; INA bearing users eagerly expect that the bearing mounted on the mainframe will not damage and maintain its dynamic function during the scheduled operation period; but the objective facts are sometimes not perfect; the sudden bearing failure will be A significant loss to the user. After many bearing failure analysis studies indicate; bearing short life or premature loss accuracy; some are due to data defects or improper production; but to a considerable extent because there is no strict compliance with bearings The device is used for protection and protection; or the bearing is not properly selected or the actual load exceeds the extra load of the thin-walled bearing itself to cause abnormal damage to the bearing.
The temperature of the bearing; usually the temperature outside the bearing can be estimated; if the oil hole can directly measure the outer ring temperature of the thin-walled bearing; it is more suitable. Usually; the temperature of the INA bearing gradually rises with the beginning of the bearing; 1 - After 2 hours, the stability is reached. The normal temperature of the bearing is due to the heat capacity of the machine; the heat dissipation; the speed and load are different. If it is smooth and the device is suitable, the bearing temperature will rise sharply; it will show abnormal high temperature; Suspend work; adopt necessary precautions.
The bearing exhibits cracking and falling off because the INA bearing is under the effect of cyclic load; the touch surface is easy to form fatigue damage; so in order to improve the service life of the bearing; bearing steel needs to have high touch fatigue strength.
Hardness is one of the important qualities of bearing quality; it has a direct impact on the fatigue strength, wear resistance and elastic limit of the touch. The hardness of thin-walled bearing steel usually reaches HRC61~65 under the condition of use; Touch fatigue strength and wear resistance.
The frame is made of nylon 46; the sliding friction between the ball and the frame is reduced. Others; the concave and convex shape of the rotation direction is also eliminated; then the mixing loss is reduced. In addition, the shape of the stress during assembly is slowed down; The assembly function is guaranteed. The lost torque on a single holder is reduced by 30-40%; the lost torque of the thin-walled bearing is reduced by 50-65%. The company estimates; the Prius will use 10 forms and 15 forms of fuel efficiency from the past. 35. 5km / L progressed to 38.0km / L; about 1-2% of the improvement of fuel efficiency was achieved through the selection of such bearings.
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