Q 5: What is roll service cycle?
Q 5: What is roll service cycle?
A5:
The work roll is changed according to the requirements of the rolling plate surface, and the specific service period is not specified.
660 Back-up rollers ensure that the machine cycle is less than 10 days or the steel volume is less than 500 tons;
780 Back-up rollers ensure that the machine cycle is less than 12 days or the steel volume is less than 700 tons;
1100 Back-up rollers ensure that the loading cycle is less than 15 days or the steel throughput is less than 3000 tons.
After the new roll arrives at the factory, the residual stress release period of 2-3 months is guaranteed before the machine is used.
After the roll is removed from the machine, it is parked for 12 hours before grinding, and the work roll is placed for 12 hours after grinding and then used on the machine. After grinding, the back-up roll should be placed for more than 10 days before being used
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Q 7 How to properly do roll grinding check? 
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Q6: How to do roll storage inspection 
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