INA bearing quality inspection standards and technologies

First, reasonable structure design and equipped with advanced, just can have a longer INA bearing life. 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 products bearing heat treatment and grinding process, often has more direct relation with INA 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 INA bearings. Second, INA bearing material metallurgy quality were the main factors influencing the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in the INA bearing failure analysis share has declined obviously, bearing but it is still one of the main influence factors of bearing failure. Third, proper material whether is still INA bearing failure analysis factors must be considered. The main task of the INA bearing failure analysis, it is based on a lot of background material, analyze data and failure forms, find out the main factors of bearing failure, so that the improvement measures are put forward, prolonging bearing, avoid premature failure of the bearing of the sudden. Installation conditions is one of the primary factor of using factors INA bearings are often caused by improper installation and the force states of INA bearings between various parts of a complete set of changes, INA bearings under the abnormal state of operation and early failure. Detection, first open the INA bearing cover, the diameter of the lead wire, appropriate to cut it into 15 ~ 40 mm long segments, on the shaft neck and upper and lower bearing interface, cover the bearing cover, tighten the retaining bolt torque by the regulation, unscrew the bolt, then remove the bearing cover, micrometer is used to inspect flattening lead wire thickness, and the average of the top bearing clearance. If the top gap is too small, can add pad on the surface of the upper and lower tile combination. If too large, the reduction of pad, scraping the inquiry or watering the tile again. Adjustment of bearing force: in order to prevent the bearing shell may occur in the process of job rotation and axial movement, besides the fit interference and stop parts, bearing bush must also use the INA bearing cover to compaction, tip clearance method, measurement method and measure the thickness of the soft lead wire, can be used to calculate the bearing force ( With the elastic deformation of axle bush compressed volume) General bearing pressure force at 0. 02 ~ 0. 4 mm. If the clamp force do not conform to the standard, usable INA bearings and bearing seat junction plane increase or decrease the shim thickness method to adjust, tile back no padded. Slide INA bearings except to ensure the radial clearance, should also guarantee the axial clearance. Detection of axial clearance, remove the shaft to an extreme position, and then measured with a feeler dial indicator or shaft position from one extreme to another extreme position of channeling momentum namely axial clearance. When sliding INA bearing clearance is not in conformity with the provisions, should be adjusted. Often use shim adjustment of open type bearing radial clearance, Tip clearance) 。