The cause of hair ring processing TIMKEN bearing overheating

TIMKEN bearing surface if bad quality, the corrosion resistance of workpiece will drop. When artifacts are serious overheating TIMKEN bearing produce grain, and is very thick, also can make in steel 8 existing volume increases, the easy to cause bearing the workpiece hot working performance deterioration. Lcrl8Ni9Ti stainless steel with body or flange when overheating, easy to produce the surface of the orange peel shape defects. 1. Lubricating oil or grease varieties selected wrong; 2. Insufficient lubrication ( The oil level is too low, the oil or grease seal leakage) ; 3. Bearing clearance is too small ( Choose the wrong) ; 4. Bearing in the mixed with sand or impurities such as carbon, abrasive effect; 5. Bearing in the mixed with water, acids or paint such as dirt, corrosion effect; 6. Bearing is hole clip flat ( Hole hole roundness is not good, or distortion is not straight) ; 7. And the bottom surface of the bearing pad iron uneven ( Lead to a hole deformation even crack of bearing seat) ; 8. Bearing hole with sundry ( Residues have chip, dust, etc. ) ; 9. Seal eccentric ( Touching the adjacent components and friction) ; 10. Bearing by additional load ( Bearing axial awful a tight, or on a shaft with two fixed end bearing) ; 11. Bearings and shaft is too loose, The smaller the diameter of the shaft or set set not tighten) 12. Bearing clearance is too small, too tight (when rotating Set set of tighten too far) ; 13. Bearing noise ( The roller face or steel skid) ; Therefore, the following main prevent measures are put forward: 1. We will strictly control lcrl8Ni9] Ri of the stainless steel body, flange forging heating temperature and heating time of heat preservation, prevent work-piece overheating make coarse grains. 2. Artifacts in forging process, such as forging ratio is too small, finish forging temperature on the high side, also easy to appear coarse grain structure defects, should make workpiece forging ratio appropriate, sufficient, finish forging temperature is moderate. 3. TIMKEN bearing the workpiece heat treatment solid solution treatment temperature is unfavorable and exorbitant, heat preservation time also shoulds not be too long, the heating temperature should be no higher than 1150 'C, holding time 1 - It is advisable to l_5min/mm calculation. 4. Overheating in the organization of the bulky artifacts, to forge refine grain method can be used to eliminate defects, in order to prevent the deformation of workpiece in cold orange peel surface defects, improve surface quality of workpiece. The main cause of TIMKEN bearing burn is due to the bad lubrication TIMKEN bearings, may use the informal lubricant, or lubricant too much, too little, is not correct. The second is probably too big load ( Preloading is too big) 。 Speed is too large. Clearance is too small. With water or other foreign matter invasion. If the above two cases are not the shaft, the accuracy of bearing box, shaft deflection. See here, I think everyone wants to know the solution, first of all, to study lubricants and lubrication method, choose the right bearing lubricant, and its dosage, and the selection of the bearing must be corrected. Study to cooperate, bearing clearance, and preloading, and improve the sealing device. Check the shaft and the precision of the bearing housing. Of course, if you have any experts beside you, let him follow you learn best operation!