The bearings used in the rolls of short-stress rolling mills are mostly rolling bearings
Rolling mill bearing burning refers to the phenomenon that the sliding heat generated by each part of the bearing increases sharply during the operation of the bearing, and plastic deformation causes the parts to stick, and the phenomenon of seizure caused by excessive wear. Each bearing has a pre-calculated service life. The life of the rolling bearing used in the rolling mill is to run under certain working conditions. The total number of revolutions of the rolling elements when fatigue corrosion points appear on the raceway or at a certain speed The total number of hours worked.
The failure of the bearing of the roll is damaged, causing the auxiliary bearing of the rolling mill to not be used normally. There are three failure modes of rolling bearings.
① Fatigue pitting
Using a period of time, under the action of cyclic contact stress between the bearing raceways and rolling elements, fatigue pitting damage will appear on the surfaces of the inner and outer raceways or rolling elements.
② Plastic deformation
Under the action of a relatively large static load or impact load, the local stress at the contact point between the rolling element and the raceway may exceed the yield limit of the material, resulting in uneven plastic deformation at the contact point, resulting in pits, increasing rotation resistance and The phenomenon of reduced rotation accuracy causes noise when the bearing is running.
③ Wear is mostly caused by poor lubrication of bearings or improper working environment. If the rotation speed is too high, it will cause damage to the bonding.