When the rolled piece has just been bitten by the next rolling mill or has been rolled for a period of time. Suddenly, piles of steel appeared on the stand between the two rolling mills, and the heads of the rolled pieces were usually pulled off.
The main reasons are: the speed of a certain rack changes suddenly or the set speed is inappropriate; the actual red blank size deviation is large; the set roller does not move, etc.
Cnc machining method is as follows: pay close attention to the speed change and change situation on the main control screen, and confirm that the electrical control is normal;
Reconsider and verify the speed matching, and approve the red blank size at the same time, so as to reasonably control the second flow rate between the frames; check whether the telescopic action and stroke of the lifting roller cylinder are normal or blocked, whether the air pressure value meets the requirements, and check each of the lifting rollers Check whether the rotating part is stuck or the bundle is slipping. Carry out another simulation confirmation before starting rolling.
Link to this article：The main causes of accidents such as knotting of loopers and breakage of rolled parts
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