CN103495607B - Method for preventing intermediate rollers of twenty-roller sendzimir mill from rolling - Google Patents

Abstract

The invention belongs to the field of steel rolling, in particular to a method for preventing intermediate rollers of a twenty-roller sendzimir mill from rolling. The method comprises the following steps of the step 1, inserting a wedge-shaped steel plate into a gap between two rows of intermediate rollers of the mill, beginning to give the maximum eccentricity of the mill, slowly inserting the steel plate into the gap until the steel plate is clamped by the two rows of intermediate rollers and cannot be inserted any more, and recording the maximum eccentricity at the moment, and the step 2, in a rolling process of the mill, setting a given actual eccentricity smaller than the maximum eccentricity in the step 1 to the mill. The method can prevent roller surfaces of the intermediate rollers from milling and prevent the roller surfaces from being damaged. Meanwhile, the operation efficiency of the mill is improved.

Description

20 roller sendzimir mill one intermediate calender rolls are prevented to be pressed against method

Technical field

The invention belongs to iron and steel rolling field, specifically one prevents sendzimir mill one intermediate calender rolls to be pressed against method.

Background technology

The press function of 20 roller sendzimir mills is mainly realized by the bias design of backing roll, and therefore, its depression stroke is very little.After operation roll of mill uses a period of time, due to grinding, roller footpath diminishes, and causes rolling mill screwdown sometimes to reach range and can't push down band steel, at this moment needs the lateral deviation heart function using milling train.Namely adjusted by the lateral deviation heart, an intermediate calender rolls, two intermediate calender rolls, backing roll are extruded to centre, improves rolling mill screwdown stroke capability with this, make the less working roll in roller footpath also can push down band steel, realize smooth rolling.But milling train is eccentric given too large sometimes, two intermediate calender rolls can be caused to be close together, form roll surface and be pressed against, damage roll surface, need again change an intermediate calender rolls during rolling.Not only cause the non-normal consumption of an intermediate calender rolls, also affect the production time.

Summary of the invention

Technical problem to be solved by this invention is: the problem damaging roll surface when how to solve the pressure process rolling of 20 roller sendzimir mills.

The technical solution adopted in the present invention is: prevent 20 roller sendzimir mill one intermediate calender rolls to be pressed against method, carry out as follows:

Step one, wedge-shaped steel plate is inserted the gap that an intermediate calender rolls arranged by milling train two, and slowly insert, at this moment start given milling train maximum eccentric, until any two rollers of two row's one intermediate calender rolls clamp the steel plate of insertion, till steel plate can not insert again, record maximum eccentric value now;

Step 2, in mill milling process, the given actual eccentricity value of setting milling train is less than the maximum eccentric value of step one.

The invention has the beneficial effects as follows: the present invention can prevent an intermediate calender rolls roll surface to be pressed against damage roll surface; Milling train efficiency of operation can be improved simultaneously.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is steel plate structure schematic diagram of the present invention;

Wherein 1, steel plate, 2, one intermediate calender rolls, 3, two intermediate calender rolls, 4, backing roll.

Detailed description of the invention

As shown in Figure 1 with shown in Fig. 2, mill operator is after replacing one intermediate calender rolls, a steel plate insertion milling train two is arranged the gap between an intermediate calender rolls, at this moment given milling train is started eccentric, slowly insert steel plate simultaneously, till any two rollers of two row's one intermediate calender rolls clamp the steel plate of insertion, operative employee records maximum eccentric value now.In operation subsequently, as long as the actual eccentricity value that milling train is given is less than this maximum eccentric value at every turn, an intermediate calender rolls would not be caused to be pressed against.

Claims (1)

1. prevent 20 roller sendzimir mill one intermediate calender rolls to be pressed against method, it is characterized in that carrying out as follows:

Step one, wedge-shaped steel plate is inserted the gap that an intermediate calender rolls arranged by milling train two, and slowly insert, at this moment start given milling train maximum eccentric, until any two rollers of two row's one intermediate calender rolls clamp the steel plate of insertion, till steel plate can not insert again, record maximum eccentric value now;

Step 2, in mill milling process, the given actual eccentricity value of setting milling train is less than the maximum eccentric value of step one.