(1) It is practically impossible to completely eliminate the residual stress on the surface of the roller after grinding. It is necessary to measure the hardness value of each pair of rollers before and after grinding to conduct long-term tracking and master the performance status of the roller. This is conducive to timely revision of reasonable grinding processes. In addition, when the normally rolled roll is unloaded from the rolling mill, the main operator of the rolling mill should fill in the roll change sheet with the rolling time, rolling tonnage, reasons for changing the roll, etc. The grinder can make appropriate adjustments to the grinding amount based on the usage. In order to eliminate the stress naturally, the roller must be naturally cooled to 25 ℃~30 ℃ before being reground. Complete process data should be recorded every time the roller is reground.

(2) Grinding taper chamfers at both ends of the work roller can effectively reduce stress concentration. Designing circular arc compound chamfers at both ends of the backup roller can effectively reduce the stress concentration at the edges of the backup roller itself, and can also alleviate the concentrated load impact of the backup roller edges on the work roller.

(3) Rollers should not be used with surface fatigue cracks. After rolling a certain amount of aluminum strip, slight cracks may occur due to surface fatigue hardening. If not detected and polished in a timely manner, the surface of the roller may be fatigue damaged to spalling. This requires the main operator of the rolling mill to promptly inspect and change the rollers according to regulations. Experienced production managers can timely change the roller and regrind the fatigue layer before it produces any minor cracks.

(4) Reasonably select process parameters such as rolling force reduction to prevent unnecessary heavy load impact on the roll surface. When a new roller is changed into the rolling mill to start loading, the rolling force should be gradually increased to the target parameter in a stepped manner, which can avoid excessive changes in the force on the roller.

(5) Ensure that the rolling oil spray system does not exhibit abnormal conditions. During the rolling process, a large amount of friction heat is generated between the roller and the aluminum strip. The spray system must have sufficient cooling and lubrication capacity, otherwise excessive thermal shock will be generated on the roller. In addition, if process permits, extreme pressure additives are added to the rolling oil to improve its viscosity. Good lubrication can reduce roller wear, alleviate thermal fatigue, reduce rolling force, improve the stress state during rolling, and also stabilize the rolling roller system.

(6) After new grinding, the roll that is changed into the rolling mill should be preheated with the maximum spray amount first, so that the roll and oil temperature are basically consistent. When starting rolling, the rolling speed should be slowly increased to fully preheat the roller. This can avoid generating excessive thermal stress on the roll body due to excessive thermal shock for a short period of time.

(7) When using rollers, it is necessary to ensure that all rollers have a moderately balanced workload and that new and old rollers are used alternately. Try to let the roller have a longer natural aging time.

(8) In winter, necessary insulation shall be carried out for the newly replaced roller according to the ambient temperature of the plant. If the ambient temperature is too low, insulation shall be carried out to evenly and slowly cool the roller to prevent stress changes due to excessive temperature differences.