CN103157669A - Gripping control method in rolling process of heavy rail - Google Patents

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

The control method of nipping in a kind of rolling heavy rail

Technical field

The present invention relates to the rolling mill practice control field, relate in particular to the control method of nipping in a kind of rolling heavy rail.

Background technology

Universal mill is rolling more than 50 kilograms during the rank heavy rail, the UR roller phenomenon of not nipping often appears, analyze and find, when roughing 1100 milling train five holes use be last footpath roller the time, because the new roller of UR roller 1120 of universal mill is large roll neck, phenomenon is more obvious, can cause first and second piece steel of open rolling not nip.Because universal mill is automatically to control, the rolling mill main motor rotating speed can not in time be adjusted when nipping, to come be exactly that the speed (biting speed) of 40 rev/mins is rolling as long as rolled piece is traversing, can't speed change, so not only cause a large amount of waste products but also also have the long accident treatment time, affect the production direct motion, cause the increase of production cost.

Summary of the invention

The purpose of this invention is to provide the control method of nipping in a kind of rolling heavy rail, the employing program is intervened the operation of rolling of rank heavy rail more than 50 kilograms, improves the phenomenon of not nipping.

For solving the problems of the technologies described above, technical scheme of the present invention is:

The control method of nipping in a kind of rolling heavy rail when rolled piece enters universal mill UR roller, by adjusting universal mill master motor speed, makes rolled piece obtain enough kinetic energy, the UR roller pass of nipping smoothly, and its concrete operation step is as follows:

1) before rolled piece enters universal mill UR roller, the pass water of universal mill is closed, stop the automatic rolling program of universal mill;

2) when rolled piece is traversing come after, the rotating speed of universal mill master motor is brought up to 100～110 rev/mins;

3) rolled piece was rubbed 30～40 seconds on the UR roller, then the rotating speed with universal mill master motor decelerates to 10～20 rev/mins, until rolled piece is snapped into pass;

4) after rolled piece is nipped 2～3 meters of passes, manually pour out rolled piece, then open the pass water of universal mill, recover universal mill automatic rolling program, begin normally rolling.

Compared with prior art, the invention has the beneficial effects as follows: adjust universal mill master motor speed by method first quick and back slow, make rolled piece obtain enough kinetic energy, rolled piece is after rubbing 30～40 seconds on the UR roller simultaneously, workpiece front end is by wear down, and the rolled piece UR roller pass of being nipped smoothly reduces the steel scrap appearance that causes because of not nipping, be applicable to rank heavy rail more than 50 kilograms, guarantee the production direct motion.

The specific embodiment

The invention will be further described below in conjunction with the specific embodiment:

The control method of nipping in a kind of rolling heavy rail of the present invention, improve the phenomenon of not nipping when more than 50 kilograms, the rank heavy rail enters universal mill, when rolled piece enters universal mill UR roller, by adjusting universal mill master motor speed, make rolled piece obtain enough kinetic energy, the UR roller pass of nipping smoothly, its concrete operation step is as follows:

1) before rolled piece enters universal mill UR roller, the pass water of universal mill is closed, stop the automatic rolling program of universal mill;

2) when rolled piece is traversing come after, the rotating speed of universal mill master motor is brought up to 100～110 rev/mins;

3) rolled piece was rubbed 30～40 seconds on the UR roller, then the rotating speed with universal mill master motor decelerates to 10～20 rev/mins, makes the speed of a preshoot of rolled piece acquisition owing to slowing down suddenly, until rolled piece is snapped into pass;

4) after rolled piece is nipped 2～3 meters of passes, manually pour out rolled piece, then open the pass water of universal mill, recover universal mill automatic rolling program, begin normally rolling.

Adjustment process of the present invention can be introduced program, realizes Based Intelligent Control.

Claims (1)

1. the control method of nipping in a rolling heavy rail, is characterized in that, when rolled piece enters universal mill UR roller, by adjusting universal mill master motor speed, makes rolled piece obtain enough kinetic energy, the UR roller pass of nipping smoothly, and its concrete operation step is as follows:

1) before rolled piece enters universal mill UR roller, the pass water of universal mill is closed, stop the automatic rolling program of universal mill;

2) when rolled piece is traversing come after, the rotating speed of universal mill master motor is brought up to 100～110 rev/mins;

3) rolled piece was rubbed 30～40 seconds on the UR roller, then the rotating speed with universal mill master motor decelerates to 10～20 rev/mins, until rolled piece is snapped into pass;

4) after rolled piece is nipped 2～3 meters of passes, manually pour out rolled piece, then open the pass water of universal mill, recover universal mill automatic rolling program, begin normally rolling.