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Technical Analysis of INA Thin-wall Bearing Parts in Production Process
Jan 17, 2018

Technical Analysis of INA Thin-wall Bearing Parts in Production Process

      INA bearings in a superior continuous form will announce low whine and bruise noise, which diverges with the speed of thin-walled bearings.

     If there is intermittent noise, it is clear. When a sharp hissing, squeaking and other unruly noises are announced, it is often revealed that the bearing is in bad continuous rotation.

     When working under high pressure, the grease with small needle penetration should have higher oil film strength and extreme pressure performance. When selecting grease according to environmental conditions, calcium base grease is not easy to dissolve in water. Common lubricating greases for dry and less moisture. INA bearings include calcium base grease, sodium grease, calcium sodium grease, lithium base grease, aluminium grease, molybdenum disulfide grease, etc. Quantity. Suitable for 1 / 2-1 / 3 of the inner space of the bearing. Excessive grease should be reduced to 1/3 at high speed will increase the temperature.

     The temperature of the bearing, usually the temperature outside the bearing chamber can be inferred, if the oil hole can be used to directly measure the outer ring temperature of thin-walled bearing, it is more appropriate. Usually. The temperature of the INA bearing rises slowly as the bearing begins to operate and reaches a steady state for 1-2 hours. The normal temperature of the bearing varies depending on the heat capacity, heat dissipation, speed and load of the machine. If lubricated. If the mounting part is suitable, the bearing temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and the necessary precautions should be taken.

     Bearing is a kind of precision mechanical support element. The user of INA bearing hopes that the bearing installed on the main engine will not damage and maintain its dynamic performance during the scheduled service life. But the objective fact is not satisfactory sometimes, the sudden bearing failure accident will cause the heavy loss to the user. Through the massive bearing failure analysis research, the bearing short life or the premature loss of precision is shown. Some are due to material defects or improper manufacturing, but to a considerable extent is due to not strictly in accordance with bearing use requirements for installation, maintenance. Or the improper selection of bearings or the fact that the actual load exceeds the rated load of the thin-walled bearing itself, etc. Cause abnormal bearing damage.

     Bearing crack and spalling is due to the INA bearing under the action of cyclic load, the contact surface is easily caused by fatigue damage, so in order to improve the service life of the bearing. Bearing steel must have high contact fatigue strength. On contact fatigue strength, wear resistance and elastic limit. Only then can the bearing obtain higher contact fatigue strength and wear resistance.

     The cage is made of nylon 46, which reduces the sliding friction between the ball and the cage. In addition, it eliminates the concave and convex shape in the direction of rotation, thus reducing the loss of stirring. The assembly performance is ensured by using a shape that reduces the stress during assembly. The lost torque on a single cage is reduced by 30 to 40 per cent. The overall torque loss of the thin-walled bearings was reduced by 50 / 65. The company speculated that the Prius increased the burning efficiency of the 10 and 15 modes from the previous 35.5km / L to 38.0 km/ L. About 12% of the improved burning efficiency is obtained through the use of this bearing.

    In order to meet the requirements of large quantity, high efficiency and high quality, the thin wall bearing steel should have good processing performance, for example, cold, in order to meet the requirement of large quantity, high efficiency and high quality, INA bearing parts must go through many cold and hot working processes in the production process. Hot forming performance, cutting performance, hardenability, etc.