JPS62142007A - Sheet width control rolling mill - Google Patents

Abstract

PURPOSE:To realize adequate and smooth sheet width control rolling of a thin sheet by respectively disposing a pair of cross pinch rolls which sandwich the thin sheet to be rolled and have crossed roll shafts in front and rear positions near rolling rolls for the transverse direction of the sheet. CONSTITUTION:A pair of the upper and, lower cross inch rolls 14, 15, 16, 17, 18, 19, 20, 21 which sandwich the thin sheet 1 to be rolled and have the crossed roll shafts are provided to the front and rear positions near a pair of the rolling rolls 8, 9 for the transverse direction of the sheet between rolling mills 2 and 3. These pinch rolls 14, 15... play the function to prevent the buckling of the thin sheet 1 by the pressing force of the rolls 8, 9 during the cross rolling of the thin sheet 1. The adequate and smooth width control rolling of the thin sheet is thus executed.

Description

Detailed Description of the Invention <Industrial Field of Application> The present invention relates to a strip width control rolling device in a hot rolling mill, and more specifically (buckling occurring in a thin plate rolled by width direction rolling rolls). This invention relates to a strip width control rolling device that aims to prevent the above.

<Prior Art> Conventionally, in a thin plate width control rolling apparatus, a strip 1, which is a thin plate rolled by a rolling mill 2, is rolled by a pinch roll 1- as shown in FIG. 7 for the purpose of improving the yield in the width direction of the plate. One example is one in which rolling rolls 8 and 9 are pressed in the width direction of the sheet while being restrained at a pressure of 0.11. In this case, the edge thickness of the thin plate 1 is increased by the widthwise rolling rolls 8 and 9, and rolled by the subsequent rolling mill 3 to improve the widthwise yield of the final thin plate product. Here, in FIG. 7, 4 and 6 indicate work rolls, and 5 and 7 indicate backup rolls, respectively.

<Problems to be Solved by the Invention> As a conventional plate width control rolling apparatus for thick plates, a normal one as shown in FIG. 6 is used.

That is, a pair of rolling rolls 8 and 9 in the width direction are disposed between the two rolling mills 2 and 30, and width control rolling of the strip 1, which is a thick plate of the plate gB, is performed.

In the case of this thick plate, Fig. 5(a) and Fig. 5(b)
A strip 1 that has been subjected to width rolling as shown in FIG. 1 is formed, and smooth width control rolling can be performed there without any problems.

However, in the case of a thin plate, if width control rolling as shown in Fig. 6 is performed, the relationship between the plate thickness and the plate width ratio will result in a thin strip having a width B' in the plate width direction as shown in Fig. 4. 1, buckling occurs.

For this reason, as described above, in width control rolling of a thin plate, pinch rolls 10 and 11 are provided on the upper and lower sides as shown in FIG. However, even with this method, the contact arc length between the thin strip 1 and the upper and lower pinch rolls 10, 11 is small and the binding force in the width direction of the strip is weak, so the fourth
Buckling as shown in the figure occurs, which is a problem.

The present invention has been made in view of the current situation, and it is an object of the present invention to provide a strip width control rolling device that can perform appropriate and smooth strip width control rolling even on thin strips.

In order to achieve the above object, the present invention has a structure in which a thin plate to be rolled is held between front and back positions near each roll of a pair of rolling rolls in the width direction of the plate, and the roll axis is It is characterized by a pair of crossed pinch rolls, each of which is crossed.

<Function> With the above configuration, a force is applied to the thin plate at the position where the pair of cross pinch rolls are arranged, and the force from the rolling rolls in the width direction of the plate is directed toward the center of the width of the plate. Therefore, buckling will not occur there.

Embodiment An embodiment of the present invention will now be described with reference to FIG. 1 which is a schematic plan view, FIG. 2 which is a side view, and FIG. 3 which is a principle diagram.

In FIGS. 1 to 3, a strip 1, which is a thin plate rolled by a rolling mill 2, is shown in the vicinity of a pair of widthwise rolls 8 and 9 provided between a rolling mill 2 and a rolling mill 3. The strip plate 1 is rolled by a rolling mill 3 through a total of four pairs of upper and lower cross pinch rolls, which are arranged so that their roll axes cross each other while pinching the strip plate 1 at front and rear positions.

These cross pinch rolls 14, 15, 16° 17.1
The actions of 8, 19, 20, and 21 will be explained using the upper cross pinch roll 20 and the lower cross pinch roll 21. That is, as shown in FIG. 3, when the upper cross pinch roll 20 and the lower cross pinch roll 21 are crossed, a thrust force is generated in the axial direction of each roll, and the upper cross pinch roll 20 is moved in the roll axial direction. Receive the power of ni. Further, a force C is generated in the band plate 1 in the direction of movement. Therefore, due to the combination of forces, a force is applied to the front side of the strip plate 1 in the direction of the plate end. On the other hand, on the back side of the strip 1, the lower cross pinch roll 21 receives a force E in the direction of the roll axis, and a force C is generated on the strip 1 in the traveling direction as on the front side. Therefore, from the combination of forces, a force F is applied to the back side toward the center of the plate. In this way, a force acts on the strip 1 to hold the strip 1 in position at the set positions of the cross pinch rolls 20 and 21.

Utilizing this relationship, four pairs of upper and lower cross pinch rolls, 14.15, 16, 17, 18, which are movable in the width direction of the sheet, are installed in front and behind each of the rolls 8°9 in the width direction of the sheet.
, 19, 20° 21. As a result, the strip plate 1, which is a thin plate, has cross pinch rolls 14, 15, 16, 17° 1
Even if the strip is held at the set positions of 8.19 and 20.21 and receives the force from the pressing rolls 8 and 9 in the strip width direction, no force is applied in the center direction of the strip, and buckling +, f occurs in the strip width direction. do not. In addition, cross pinch rolls 14, 1.5, 16,
Since 17°, 18.19, and 20.21 have mechanisms that can be adjusted in the strip width direction, smooth strip width control rolling is possible without any problems even when the strip width changes.

<Effects of the Invention> As described above, according to the present invention, buckling in the sheet width direction is eliminated even in thin sheets, and proper and smooth sheet width control rolling can be performed, resulting in improved production efficiency in actual operations. The effect of improving the yield rate and the yield in the sheet width direction can be obtained.

[Brief explanation of drawings]

FIG. 1 to FIG. 3 show an embodiment according to the present invention.
Fig. 1 is a schematic plan view, Fig. 2 is a side view, Fig. 3 is an enlarged principle view of section G in Fig. 1, Fig. 4 is a sectional view of a conventional strip plate, Fig. 5(a) is a plan view of a conventional strip plate, and FIG.
) is a sectional view taken along line H--H in FIG. 5(a), FIG. 6 is a schematic plan view of a conventional example, and FIG. 7 is a side view of another conventional example. Also, in the symbols in the figure, 1 is a strip, 2 and 3 are rolling machines, 8,
9 is a rolling roll in the plate width direction, 14,15°16.17,1
8, 19, 20, and 21 are cross pinch rolls.

Claims (1)

[Claims] Width control rolling, characterized in that a pair of cross pinch rolls, each of which pinches the thin plate to be rolled, and whose roll axes are crossed, are arranged at front and rear positions near each roll of a pair of widthwise rolling rolls. Device.