INA single thrust ball bearing quality detection method in the process of production

INA bearing material metallurgy quality used to be the main factors influencing the premature failure of the one-way thrust ball bearings. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in the bearing failure analysis share has declined obviously, but it is still one of the main influence factors of bearing failure. Select material adequacy is still bearing failure analysis factors must be considered. INA bearing manufacturing generally go through forging, heat treatment, cutting, grinding and assembly, and multi-channel processing operations. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of finished product one-way thrust ball bearing heat treatment and grinding process, tend to have a more direct relationship with bearing failure. In recent years the study of metamorphic layer of bearings working surface show that the grinding process and is close to the surface quality of the bearing. INA bearings cracked spalling is due to the bearing under the action of cyclic load, the contact surface fatigue damage is easy to occur, so in order to improve the service life of the one-way thrust ball bearing, bearing steel must have a high contact fatigue strength. Hardness is one of the important quality of bearing quality, the contact fatigue strength, wear resistance, elastic limit has a direct impact. Thin wall bearing steel in the condition of using the hardness of general to achieve HRC61 ~ 65, one-way thrust ball bearing can get high contact fatigue strength and wear resistance. Cage is made of nylon 46, reduce the sliding friction between the ball and cage. Also, eliminates the direction of rotation of concave and convex shape, which reduces the mixing loss. In addition, by using can slow down the assembly of the shape of the stress, to ensure that the assembly performance. A single keep frame loss torque decreased 30 ~ 40%, one-way thrust ball bearing torque reduced 50 ~ 65% overall losses. INA bearing parts in the process of production, after a lot of cold and hot working process, in order to meet the requirements of mass, high efficiency, high quality, bearing steel should have good processing performance. For example, the cold and hot forming properties, machinability, hardenability, etc.