One-way bearing quenching technology safeguard way is introduced

Choose appropriate quenchant is particularly important, it determines the TIMKEN bearing parts the organization and performance after quenching, quenching medium usually have a solid, liquid and gas are three, according to the bearing when quenching medium changes of state is divided into changes of state and change of state class. Bearing the workpiece in heat treatment furnace heated to completely after austenitizing, in order to obtain the required set of woven and performance, need to quenching process. Artifacts to get martensite structure after cooling, the cooling rate must be greater than the critical cooling rate, speed too fast, but the cold causes artifacts volume shrinkage and organizational change drastically, cause a lot of internal stress. So 'F', under the condition of get martensite should make cooling rate as low as possible. Right after the repair of the one-way bearing performance is the same as the new bearing. Its clearance, and other precision parameters all can meet the requirements of new TIMKEN bearings, it is important to understand and identify damage degree to choose the right fixes. Such as fine grinding surface treatment can remove some minor damage, but cannot eliminate fatigue layer, the real cannot remove sag caused by debris or wear. Therefore, if only fine grinding of bearing surface processing, generally not suitable for bearing damage. And if after full of remanufacturing repair process, the bearing fatigue layer be completely removed, and rolling body also needs to be changed to conduct a comprehensive, cage and so on also want to conduct a comprehensive arrangement, such bearing can completely meet the requirements of the performance of the new bearing. Once the TIMKEN bearing damage, must go through a very strict testing process to determine whether the damage of the bearing can be repaired. To fix the bearing must be clean, and then are very strict and fully tested. First is to detect bearing as long as the damage, such as whether there is a crack, flake and overheating discoloration, etc. , these bearing damage may not be able to repair and must be scrapped. Bearing a rotation, inner ring and outer ring raceway surface, with rolling body is rolling contact, as the dark side, thus orbit trajectory are attached to the raceway surface does not belong to abnormal, the change can be learned that load conditions, so in the case of dismantling the TIMKEN bearings, please keep close attention and observation on the surface of the raceway. If you look closely at orbit, will know that only bear radial load, bear the axial load of big, inherit the torque load, or extreme rigid in bearing box is not equal. 1, a one-way bearing clearance should be appropriate, too big impact, poor lubrication is too small, may burn. 2, improve the quality of lubrication, control oil pressure, temperature and flow rate, strengthen the oil filtration. 3, a one-way bearing and shaft neck surface quality and geometry shape must be strictly guaranteed. 4, adopt appropriate designation of fuel and lubricating oil. 5, control the temperature of the diesel engine state, in the case of overheating too cold work will be unfavourable. Cold day, should be preheated before starting of diesel engine, with the hand rolling crankshaft oil into friction surface.