Process Adjustment of Wire Rod Mill

Generally, the process adjustment of the wire rod mill only involves the first order and the finished order, and the other orders cannot be adjusted at will. There are two reasons:

• Moving the roll gap of one of the racks will destroy the micro-tension relationship between the racks and cause product size fluctuations;
• The opening of the guide roller of the rolling guide is accurately adjusted according to the sample rod. If you enlarge a certain roller gap, it will cause the incoming material to become larger, resulting in a reduction in the service life of the guide roller and even damage to the guide wheel. If the roll gap is narrowed by a certain pass, the incoming material will become smaller, the guide wheel will be unstable.   

When the height and the width of the finished product is too large, the first rolling mill should be adjusted first, and then the finished rolling mill should be adjusted;

The cumulative adjustment of the first and finished product rolling mills shall not exceed 0.3mm.

When it is found that the surface quality of the billet is not good, the machine should be stopped to check for foreign objects in the roller ring and guide guard.

(1) The vertical diameter of the finished product is larger, the horizontal diameter is slightly smaller, and the roll gap of the finished product is reduced;

(2) When the vertical diameter of the finished product is small and the horizontal diameter is just right, enlarge the roll gap of the finished product;

(3) When the vertical diameter of the finished product is just right and the horizontal diameter is large, the roll gap of the first sorting is reduced;

(4) When the vertical diameter of the finished product is just right and the horizontal diameter is small, enlarge the roll gap of the first sort.

If the requirements are still not met after the above adjustments, the incoming material size of the front unit should be checked, and the roll gap of the last frame of the front unit should be enlarged or reduced. The cumulative adjustment of the roll gap of the first and last rolling mills of the wire rod mill should not exceed 0.3mm.

The main reasons for the stacking steel in the tail during rolling are as follows:

(1) The size of the rolled product in the previous pass is too large, so that when the rolled product enters the next pass, it is squeezed in the entrance splint and causes steel pile;

(2) Due to the uneven deformation of the billet head during rolling, the low temperature of the billet head and the inclusions may cause the splitting of the rolled piece;

(3) The torsion guide guard is seriously worn or the torsion guide wheel bearing burns out and does not turn, causing the torsion angle to change and causing steel piles;

(4) The elbow of the rolled piece is made into the next lane and will not enter, causing the pile of steel.

The reasons for stacking steel in the tail during rolling are:

(1) Defects caused by the blank itself, such as delamination, severe bubbles, etc., are rolled to half during the rolling process, causing steel stacking;

(2) When the speed of a certain intermediate rolling mill is set improperly, it actually produces a steel pile rolling state. The first half of the rolled piece is maintained by the front rolling mill to maintain tension rolling; when the tail of the rolled piece leaves the front rolling mill, the tension suddenly loses there, thus Cause the frame to produce steel pile;

(3) Due to the sudden increase or decrease of the speed of the motor of a rolling mill, which destroys the original continuous rolling relationship and causes steel stacking;

(4) Due to the sudden breakage of the roll, or the severe damage of the guide guards in the previous passes, the cross-section of the rolled piece has changed and the steel pile has been caused.