SU1614874A1 - Method of rolling strip steel - Google Patents

Abstract

The invention relates to ferrous and non-ferrous metallurgy, namely, rolling production, and can be used in rolling strip steel. The goal is to increase the accuracy of the width of the rolled strip by increasing the shrinking of the side edges of the roll in the control rib caliber. The roll in the precontrolled reservoir caliber is bent into an angular profile with unfolded shelves and in a place of bend is pressed in the control rib caliber to the side walls, after which the deformed angular blowout is distributed into a strip in the finished formation caliber. By increasing the rolling accuracy using the proposed method, metal saving is achieved. 10 il.

Description

The invention relates to ferrous and color: ° rolling production, and can be used in rolling strip steel.

The purpose of the invention is to improve the accuracy of the size of the width of the rolled strip by increasing the compression of the side edges of the roll in the control rib cannon. ozaan the original bandpass roll by a known method; Fig 2 - pre-control reservoir caliber of a known method; FIG. 3 shows the reference gauge caliber of a known method (the shaded areas are the offset

Excess deformation of the lateral edges of the roll; in FIG. 4 — the final reservoir caliber of a known method on Φ “r.

VGGG - ORIGINAL BAND, and roll on the proposed method; on

; glp1p IT ° ° caliber angular shape; Fig. 8 is a diagram illustrating the process of pressing the roll to the side wall of the test rib gauge on

MruMlV process of deformation of the lateral edges of the roll in the control rib caliber (solid - KToHT after deformation, pun-portions; areas - displaced metal volume in recipe; ° caste formation caliber (solid lines - outline of a riopop: 4 °, е - before rolling) carried out in the following order.

about

PoloBOH peals are formed in rough gauges (Fig. 1), which are compressed in an ied control caliber caliber (Fig. 2), and then set in a control re- (front caliber (Fig. 3). In peals caliber is de-normalized, crimped the side edges of the strip. At the same time, it does not touch the side walls of the streams of the salibra. After that, the roll is compressed in the finishing formation caliber of figure 4), where the thickness and width of the strip are finally formed.

In practice, when crimping wide strips 4-8 mm thick in the rib caliber | due to the rapid cooling of the roll, the resistance to metal deformation increases, a longitudinal bend occurs on the deformable strip (Fig. 5), the lateral edges of the roll practically do not deform. As a result, the width of the roll is not controlled, and when it is compressed in the finishing formation caliber, a strip is obtained with a low width accuracy.

According to the invention, the strip peal produced in rough gauges (FIG. 6) is compressed in an angular form pre-controlled in-situ caliber (FIG. 7). Here, together with compression, the strip is bent, then the roll is set into the control rib caliber. When the rollers pick up the roll, due to the bending previously made in the angular form preliminarily made in the pre-control caliber caliber, it is pressed at the bend site to the side walls of the caliber (Fig. 8). When crimping the roll, the side walls of the control rib caliber prevent further bending of the roll and thus contribute to intensive compression of its side edges (Fig. 9): As a result, after smoothing the roll in the finishing laminate caliber (Fig. 10), the finished strip has high dimensional accuracy in width .

Pr and measures. To obtain a strip steel section with a cross section of 5X 80 mm, increased accuracy according to the proposed method, calibration has been developed, which provides

receiving a profile in three passes from a strip bar 10 X 90 mm.

In the first precontrol caliber, when a strip bar is compressed to a thickness of 7 mm, the bar is bent into an angular profile with an angle equal to the angle between the side walls of the lower and upper streams of the control rib caliber. In the second control rib gauge, the resulting peal roll is compressed in width by 6 mm. At the same time, a peal set in a caliber is pressed at the place of bending against the side walls of the caliber. Align the peal of the angular form in the finishing reservoir caliber when it is pressed to a thickness of 5 mm. As a result of testing the developed calibration at the industrial mill 300 of the Dneprodzerzhinsky Industrial Institute, a band of required sizes was obtained. At 0 this, no variations in the width dimensions along the strip were observed.

The use of the invention is recommended on strip and section mills when rolling strip steel and will allow to increase the accuracy of the profile. Improving the accuracy of rolling strip steel due to the size of the width of the profile reduces the metal consumption in its production by 5%.

thirty

Formula and 3 o barrels

The method of rolling strip steel, including the deformation of the strip bar in the precontrolled stratum, control rib and finishing gauges, which is due to the fact that, in order to increase the accuracy of the width of the rolled strip by increasing the reduction of the lateral edges of the bar in the control caliber caliber, the bar in The pre-controlled caliber is bent into an angular profile with raE: with the returned shelves, it is pressed against the side walls of the control caliber at the location of the iabib, a. then, the roll of the angular form is spread in a finishing caliber into a strip.

FIG. g

FI.5

FIG.

FI.5

FIG. 6

FIG. 7

Fig.8

FIG. ten

FIG. 9

Claims (1)

Claim A method for rolling strip steel, including the deformation of strip strips in the pre-control formation, control rib and finish gauges, characterized in that, in order to increase the accuracy of the width of the rolled strip by increasing the compression of the side edges of the stripe in the control rib caliber, the roll in the pre-control caliber is bent into an angular profile with raververted shelves, press it at the bend to the side walls of the control gauge, and then the roll of angular shape is straightened in the finishing caliber into the strip. Figure 1 FieL