Date: 2013-08-22

FAG bearings burned out analysis and preventive measures

　　FAG bearings rear axle wheels, an important part of the campaign. Main compounds in FAG bearings, able to withstand bending and torsion, and absorb some impact loads. Overall carbon alloy hardened steel axle and commonly used in quench hardening after induction heating, hardened layer depth of 4-6mm, FAG bearings found, often bearing burned out, severely affecting production quality of FAG bearings and parts induction hardening. Tests showed that 225 FAG bearings burned out area is located in coils. In the vicinity of, regularity of extended fault on both sides.
　　Vehicle axle sensor heating, in addition to heating the workpiece, in major heat loss in one of three ways of heat generated by the sensor.
　　(1) thermal radiation around. Guidance magnets, induction loops on the insulating lacquer and glass fiber cloth. This form of heat loss, heat evenly to sensor Burnout has little effect.
　　(2) cooling water heat. This part of the cooling sensor, so that safe operation of the induction heating. Studies have found that in 0-180, intake water temperature low, indicate good heat exchanging cooling water, water well, water temperature; More than 180 members. Because the stream length, temperature, water temperature, and heat exchange, since the sensors can easily result in a site (for example, 225. Part) temperature rise, which is the main induction loop combustion.
　　(3) an induction loop heat transfer plates, part of current density, large size and water temperature is low, in the area of the region, heat transfer coil. Cent and 0-90-part away from the vicinity of an induction loop, good thermal conductivity; away from the boards, low thermal conductivity, 90 per cent of the induction loop, making the area more large Induction coil temperatures likely in this section burned coil. Heat flux in different parts of the induction loop. 225 degrees near the area of the heat-sensing circuit, and savings, so prone to combustion phenomena of induction loops in the region varies.
 

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