A Biting Control Method in Heavy Rail Rolling

Abstract

The invention relates to the field of control of a rolling process, in particular to a gripping control method in a rolling process of a heavy rail. The gripping control method in the rolling process of the heavy rail is characterized in that the rotation speed of a main motor of a universal rolling mill is adjusted, so that a rolling piece obtains enough kinetic energy and grips a hole of a UR roller. The particular operation steps are as follows: (1) before the rolling piece enters the UR roller of the universal rolling mill, hole water is closed, and an automatic rolling program of the universal rolling mill is stopped; (2) after the rolling piece arrives transversely, the rotation speed of the main motor of the universal rolling mill is improved to 100-110 turns per minute; (3) the rolling piece is abraded on the UR roller for 30-40 seconds, and then the rotation speed of the main motor of the universal rolling mill is reduced to 10-20 turns per minute until the rolling piece grips the hole; and (4) after the rolling piece grips the hole by 2-3 meters, the rolling pieces is poured out by hand, and the automatic rolling program of the universal rolling mill is recovered. Compared with the prior art, the gripping control method in the rolling process of the heavy rail has the advantages of enabling the rolling piece to grip the hole of the UR roller smoothly, achieving intelligent control, and being suitable for the heavy rail with the level of more than 50 kilos.

Description

technical field [0001] The invention relates to the field of rolling process control, in particular to a biting control method in heavy rail rolling. Background technique [0002] When the universal rolling mill rolls heavy rails above 50 kg, the phenomenon of UR rolls not biting often occurs. The analysis shows that when the rough rolling 1100 rolling mill five holes uses the last diameter roll, because the new UR roll 1120 of the universal rolling mill is The phenomenon is more obvious with large roll necks, which will cause the first and second pieces of steel not to bite into when rolling. Because the universal rolling mill is automatically controlled, the speed of the main motor of the rolling mill cannot be adjusted in time when it is biting in. As long as the rolled piece moves across, it will be rolled at a speed of 40 rpm (biting speed), and the speed cannot be changed. This will not only cause a lot of waste products but also There is also a long time to deal with...

AI Technical Summary

Problems solved by technology

Because the universal rolling mill is automatically controlled, the speed of the main motor of the rolling mill cannot be adjusted in time when it is biting in. As long as the rolled piece moves across, it will be rolled at a speed of 40 rpm (biting speed), and the speed cannot be changed. This will not only cause a lot of waste products but also There is also a long time to deal with the accident, which affects the smooth production and increases the production cost.