Blooming MillRegulating Procedure
1 General
A. Thisregulating procedure is applied to the blooming mill of rolling mill andthe hot rolling equipment
B. Regulation is conducted the blooming mill to adjust the strip’scross-section dimension and its symmetrical degree, so as to achieve rolledproducts with better cross-section.
2 Preparation
A. Check the rolling reduction gap;
B. Check and adjust the roll pass, such as the front and behind pass,roll pass in the return section of blooming mill and the tooth-type passetc.;
C. Adjust the screw down system in order to reduce the blooming millroller gap;
D. Adjust other drives that involved in the working process, includingthe drive for the blooming mill, side stand and table;
E. Readjust the crane.
3 Regulation Work
A. Installation
Input the rolling reduction gap into the blooming mill;
Set up the rod changer and then adjust the roller gap;
Adjust the blooming mill top roller side shift amount accordingto the bevel;
Adjust the blooming mill rover pressure.
B. Adjustment
Input the reduction gap according to the rolling reduction;
Adjust the side shift amount of the blooming mill rolleraccording to rolling process requirement;
Adjust the blooming mill roller pressure according to therolling process requirements;
Combine the roll changer and the blooming mill roller together,in order to compare the different roll gap.
C. Finish
Adjust the side shift amount of the blooming mill rolleraccording to rolling process requirement;
Fill the piercing bottom hole and then inspect the shape of theproduct;
Adjust the blooming mill roller side shift for size location;
Use the roll gap and side shift amount data for the detailstoring;
Monitor the roll gap and side shift amount during rolling periodin order to guarantee the strip shape is with-in the tolerance.
D. Others
Check and correct the reduction gap of the blooming mill rollerregularly, in order to guarantee a good interaction between the bloomingmill table, side stand and roller;
Check the rolling process regularly, in order to ensure thedistance between the side stand is with-in tolerance.
4 Adjustment Tips
A. The blooming mill roller side shift gap could be adjusted ifnecessary, in order to improve the product shape.
B. When adjusting the blooming mill roller side shift gap, payattention to the roll changing between the roller shifts;
C. If adjust the blooming mill roller side shift gap, pay attentionto the start and end of the roller side shift;
D. The blooming mill roller must have good rigidity, in order toensure the roller has no out of shape during rolling process.
5 Safety
A. Before operating the blooming mill and other rolling equipments,personal safety protection must be considered, such as wearing rubber gloves,goggles and helmet;
B. Before adjusting the blooming mill roller, check the pressure ofthe side stand and table;
C. When adjusting the roll gap roll changer, check the roll gapcarefully, in order to prevent from hands being hurt;
D. During the working period, stay away from other drive motorsand transmission parts.
