JPH1119723A - Winding method for steel strip of reversing mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the steel strip of a coiled part in a coil from breaking, and to remarkably improve a yield by providing a difference in level on the upper edge of the groove of the gripper of a solid block, and changing over the setting direction of the gripper of the solid block according to the winding direction of the steel strip. SOLUTION: The grippers 1a, 1b are fitted in the solid block 10 by combining the blocks separated to the left and right. The gripper groove width 3 and the gripper groove depth 4 of a steel inserting groove 1c are formed in the center of the grippers 1a and 1b so that the difference in level 2 is formed by the left and right blocks. The groove width 3 and the difference in level 2 are determined according to the thickness of the steel strip to be wound. By setting the grippers 1a and 1b of the solid block 10 in the reverse direction according to the winding direction of the steel strip, rolling is performed. Consequently, the difference in level of a first winding steel strip and a second winding steel strip, which is a cause generating the bend of the steel strip at the upper edge of the inserting groove 1c, is eliminated, and the break of the steel strip of the coiled part in the coil does not occur at all, and the yield is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for winding a steel strip in a reverse mill.

[0002]

2. Description of the Related Art Generally, when rolling is performed using a solid block as a winding drum in a reverse mill, both sides of an insertion groove for inserting an end of a steel strip as a gripper for the solid block are symmetrical with respect to the groove center. And a method of setting the gripper regardless of the winding direction at the time of rolling. FIG. 5 shows a state of the related art in which a gripper 7 including left and right divided members 7a and 7b of the same shape is mounted on a solid block 10 and a steel strip 22 is wound thereon. A break 8 of the steel strip occurs at a portion where the first turn and the turn of the steel strip 22 overlap.

[0003]

According to the shape of the gripper and the method for setting the gripper as shown in FIG. 5, the first and second turns of the steel strip are bent at the bent portion of the steel strip at the upper edge of the steel strip insertion groove. There is a problem in that a step occurs in the band, and the step causes the steel band in the inner winding portion of the coil to be broken, thereby lowering the yield.

[0004] It is an object of the present invention to provide a method for winding a steel strip of a reverse mill which solves such a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a step at both edges of a steel strip insertion groove of a solid block gripper, and a solid step according to a winding direction of the steel strip. The setting direction of the gripper of the block is switched. Further, the step provided on the upper edge of the steel strip insertion groove of the gripper is formed to have a size determined by the thickness of the steel strip. That is, the present invention provides a method for winding a steel strip of a reverse mill using a solid block as a winding drum of the steel strip, wherein a step is provided at an upper edge of a groove of a gripper of the solid block and a solid is formed according to a winding direction of the steel strip. A method for winding a steel strip of a reverse mill, characterized in that the setting direction of a gripper of a block is switched and used.

In this case, it is preferable that the step provided on the upper edge of the groove of the gripper is determined according to the thickness of the steel strip.

[0007]

According to the present invention, a step is provided at the upper edge of the groove of the gripper of the solid block to switch the setting direction of the gripper of the solid block according to the winding direction of the steel strip. The step between the first and second turns of the steel strip, which is the cause of the bending of the steel strip at the upper edge of the steel strip insertion groove of the gripper, is eliminated, and the steel strip in the inner winding of the coil is prevented from breaking. be able to.

When the thickness of the steel strip changes, a greater effect can be obtained by changing the step provided on the gripper correspondingly or by using a gripper having a step corresponding thereto. it can.

[0009]

1 shows a solid block 1 to which the present invention is applied.
FIG. 4 is a schematic diagram showing an example of the grippers 1a and 1b of No. 0; The grippers 1a and 1b are assembled into a solid block 10 by combining left and right separated blocks, and form a steel strip insertion groove 1c in the center. This steel strip insertion groove 1
The groove c has a groove width 3 and a depth 4 so that a step 2 is formed between the left and right blocks. The groove width 3 and the step 2 are determined according to the thickness of the steel strip to be wound.

Hereinafter, as shown in FIG.
2 shows an example applied to a method for winding a steel strip of a Sendzimir mill 21 for rolling No. 2. The steel strip 22 is wound around the solid blocks 10a and 10b, guided by the deflector rolls 23 and 234, and reversely rolled by a reverse mill (Sendimia mill 21). The step 2 at the upper edge of the groove 1c of the grippers 1a, 1b was 2.8 mm in accordance with the average thickness of the dummy plate attached before and after the steel strip 22 to be rolled. The groove width 3 is 10 mm, the groove depth 4 is 60 mm, and the radius 5 at the gripper corner is R10 mm. The diameter of the solid block 10 is φ
660 mm and width is 1700 mm. The solid blocks 10a and 10b shown in FIG. 2 are shown in FIGS. 3 and 4, respectively.

As shown in FIGS. 3 and 4, the grippers of the solid blocks 10a and 10b are set in the opposite directions according to the winding direction of the steel strip 22, and the rolling is performed. The steel strip did not break, which greatly contributed to the improvement in yield.

[0012]

According to the present invention, a step is provided at the upper edge of the groove of the gripper of the solid block, and the setting direction of the gripper of the solid block is switched in accordance with the winding direction of the steel strip. Of the steel strip can be prevented, and the yield can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a gripper of a solid block.

FIG. 2 is an example of a reverse mill to which the present invention is applied.

FIG. 3 is a cross-sectional view illustrating a gripper according to the embodiment.

FIG. 4 is a cross-sectional view illustrating a gripper according to the embodiment.

FIG. 5 is a sectional view showing a conventional gripper.

[Explanation of symbols]

 1a, 1b Gripper 1c Groove 2 Step 3 Gripper Groove Width 4 Gripper Groove Depth 5 R 7 Gripper 7a, 7b Member 8 Steel Strip Folding 10 Solid Block 21 Sendimia Mill 22 Steel Strip 23, 24 Deflector Roll

Claims (2)

[Claims] 1. A method for winding a steel strip of a reverse mill using a solid block as a winding drum of the steel strip, wherein a step is provided at an upper edge of a groove of a gripper of the solid block, and the step is provided according to a winding direction of the steel strip. A method for winding a steel strip of a reverse mill, wherein a setting direction of a gripper of a solid block is switched and used. 2. A step provided at an upper edge of a groove of the gripper is determined according to a thickness of a steel strip.
The method for winding a steel strip of the reverse mill as described in the above.