The harm of residual magnetic bearing

The harm of residual magnetic bearings 2018 - 11 - 08 Wang Jiahe residual magnetism is due to inadequate demagnetization, and didn't found in time. At present there are still some bearing production enterprises in the final inspection of the residual magnetic suction rivet ways to determine the size of the bearing the residual magnetic intensity, rather than a magnetic measurement instrument, due to the residual magnetic often exist in the bearing of a local and even a certain point, with rivet inspection accuracy and low efficiency, neither with magnetic gauge inspection is rapid and accurate, and as long as used properly problems is not easy, it is recommended that manufacturers use the residual magnetic magnetic meter inspection. Then the residual magnetic use of bearing what harm is there? Residual magnetic bearing, the residues in the work on the surface of the metal particles is not easy to be washed away, and even devices in the work of metal particles, can be adsorbed on bearing working surface, this will accelerate bearing wear, reduce its service life. Bearing the residual magnetic was produced in the process of bearing, it mainly comes from: (1) process the clamping ( Such as electromagnetic chuck) ； (2) itself with the residual magnetic abrasive; (3) in the processing, the material of the magnetic domain magnetic moment to orientation; (4) the magnetization effect of demagnetization machine is affected by power grid, and so on. Its important effects: (1) not demagnetization or demagnetization bad bearing parts will affect the measurement and the processing quality of follow-up procedures; (2) if the bearing assembly are larger residual magnetism after cleaning, lubrication quality is hard to get care and tiny metal abrasive adsorbed on the surface bearing working speed bearing wear affect the service life of bearing and working reliability. At the same time the residual magnetism will make bearing the parts attract each other affect the rotation accuracy. So it is very important to recede bearing remanence job. (3) on the residual magnetic bearing ring when there are a lot of will make detection instrument readings produces deviation. Precautions: use a dedicated demagnetization machine of science. Note: rolling bearing the residual magnetic JB/T6641 - and its evaluation method 2007.