Author: Michael Chen

The rolling line of each stand should align in the same straight line so that is the production can normally work. If there is light offset of stand rolling line, the guide could be damage caused by uneven wear of the hole pattern; serious offset can directly cause the accident of steel stacking. The meaning…

After pickling the surface of continuous casting billet, it was found that there were mesh cracks on the surface of the billet, and the depth was up to 5mm. What causes the mesh cracks? The main reasons are: (1) The surface of the high temperature casting billet absorbs the copper…

Events Reasons Solutions 1 Rolled parts not bitten into the rolls and steels stacked The end part of a billet is forked To pick out unqualified billet The guide isn’t installed properly To Reinstall the guide The rolling piece in the guide orgroove is blocked To remove away obstructive Not polish new groove after replacenew groove. To polish new groove andregulate the rolling speed 2 Steels piled after the rolling piece have been bitten into the rolls The speed of rolling piece isn’t right. Correctly setting the speed Roll diameter input error To input the correct rolldiameter Tension setting is too small afterchanging rolls and grooves Increase the tension settingappropriately Incomplete grinding after changingnew groove Further grinding of the rolls 3 Steel stackeddue to steel jamming between rolls Motor overload,overspeed,and dropout Check steel temperature,roll size,rolling speed and electrical faults 4 Flying shear 1#,2#steel stacking Flying shear overrun speed is toolow Increase the overrun speedof flying shear Flying shear does not cut the head Check power supply,hotmetal detector Shear blade aging or poor overlap Replace shear blade,adjustoverlap Interrupt flying shear action Checking hot metaldetectors…

Heavy shock load If the shock load of the fixed-size machine is too large, it may choose a frequency conversion motor for greatly reducing the impact load, adjusting the speed of the rollers through the frequency converter, and can control speed and stopping with a grating detection installed on both…

(1) Higher descaling pressure Increasing the descaling pressure can improve the descaling effect, now the descaling pressure can reach 18-22MPa, or even higher. (2) High pressure and high flow rate descaling pumps At the beginning of high-pressure water descaling, piston pumps were used, with low pump pressure, small flow rate…