Reason Analysis on Operating Side Bearing Burning for Work Roll on Aluminum Foil Mill(2)

2017/6/2 17:57:50

Work roll bearing box is improperly assembled

Aluminum foil products on the plate shape and surface quality requirements are very high, rolling mill need to frequently change the work roll, the bearing box for multiple demolition. When installing the bearing box, pay attention to the roller bearing clearance. Bearing clearance control is very important, because the roller at high speed operation, the size of the gap on the bearing fatigue life, temperature rise, noise, vibration and so have a great impact. From the temperature rise, when the clearance is too large, will cause uneven friction, resulting in bearing local fatigue damage, reduce the bearing life; when the clearance is too small, high-speed rotation of the rolling mill, bearing ball sliding friction, Wear increased, the bearing temperature increased rapidly, resulting in bearing sintering, rolling into the new work roll drive a very short period of time will occur when the bearing lock.

Bearing the quality of the reasons

Bearing the quality of their own problems is also caused by one of the reasons roller bearing lock, and sometimes remove the work roll to hold the bearing, you will find the tapered roller bearing cage completely broken, this situation can be determined is the quality of the bearing itself And cause. Through repeated practice found that if the bearing cage has a fine crack, continue to use the bearing is high-speed rotation and bear the load state, the cage fracture and the roller can not rotate properly, causing bearing burns, and finally lead to bearing lock.

Aluminum foil rolling process

Aluminum roll rolling process on the work roll bending and tilt the use of more frequent, especially aluminum foil roughing mill, in the open billet sub-plate shape is poor, the tilt force is too large, or the blank is too narrow, bending roll to the edge The lack of wave performance, as well as the sudden break with the situation, will lead to bearing the axial load is too large, easy to damage and lead to bearing lock. With the billet quality and rolling process of continuous improvement and improvement, the cause of the work roll bearing burning has been rarely occurred.