JPS6330118A - coil box - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coil box installed in a conveying line for crude steel strip.

[Conventional technology]

Slabs cast by a continuous casting machine, or rough rolled steel strips obtained by rolling steel slabs rolled by a blooming mill into a rough rolling mill, or thin slabs cast by a continuous thin slab casting machine. (hereinafter referred to as blister strip) is rolled in a finishing mill to continuously produce a hot-rolled steel strip. The crude steel webbing is wound up into a coil between the two and then unwound.

Coil boxes for supplying finishing rolling mills are known.

By using this coil box, it is possible to shorten the length of the roller table connecting the rough rolling mill or continuous thin slab casting machine and the finishing mill, prevent the temperature drop of the crude steel strip, It is possible to reduce skid marks, reduce equipment costs, and improve quality.

FIG. 4 is a schematic diagram showing an example of a conventional coil box. As shown in the drawing, the coil box includes a deflector roll 2 adjacent to the entrance table 1 and consisting of table rolls 2a and 2b, three bending rolls 3h, 3b and 3C, and an upper roll lifting frame 3d. Gap adjustment device 3f between lifting ring 30 and vertical bending roll
A bending roll 3 consisting of a coil opening beam 4a, a rotating cylinder 4b for lifting and lowering the beam, an opener 4 consisting of a cylinder 40 for expanding and contracting the beam, a forming roll 5, two rollers 6a and 6b, and the like. A rewinding cradle consisting of a frame 6C that supports the rolls, a cylinder 6d for raising and lowering the rolls, a cradle for unwinding consisting of the roll 6, a transformer 77-7 that rotates approximately 1800 times, and two rolls 13a and 8b. It consists of a roll 8 and is connected to an output table 9.

A blister copper strip S rolled or cast by a rough rolling mill or a continuous thin slab caster is transferred to a coil box in the direction of arrow A through an entry table 1.

The deflector roll 2 carries the coil to an upper bending roll 3, and then the bending roll 3 bends the coil downward to a predetermined inner diameter.
Guided by the forming roll 5 and the winding cradle roll 6, at the initial stage of winding, the winding cradle rolls 6a and 6b move from the shape of the mark shown by C1 to the position indicated by arrow B at the beginning of winding. It shows.

When the coil C1 being wound reaches a predetermined outer diameter, the cradle roll 6 for 2 windings υ is lowered in the direction of arrow C, and C
The coil that has reached the position shown in 1 is supported by two winding cradle rolls 6a and 6b and wound up.

After winding), the coil C1 is moved to the winding cradle roll 6.
While rotating in the direction F of unwinding, which is the opposite direction to the direction shown by arrow B, the outer peripheral tail end is opened by the opener 4 and rewound. While being fed from the tail end at 9 o'clock, it is transferred to the unwinding cradle roll 8 by the transfer 7,
It continues to be rewound.

[Problem that the invention seeks to solve]

The conventional equipment described above has the following problems. That is, if the thickness of the blister copper strip S is sufficiently thick and the rigidity of the crude steel strip S is sufficient, such as when the temperature is within the temperature range of a crude steel strip by normal rough rolling, the bending roll 3) When a predetermined downward bending is applied, the tip of the crude steel strip S is guided by the winding cradle roll 6a and the forming roll 5 into an egg shape and rolled as shown at 01 in FIG. As the draw progresses, C becomes circular.

A coil is formed.

However, in the case of a crude steel strip with low rigidity, such as when the thickness of the crude steel strip S is thin, or when the temperature is relatively low, such as a 7V slab cast by a 7V continuous slab caster, the As shown by C0, the crude steel strip bends downward due to its own weight, so the tip falls to a position between the take-up cradle 6a and the forming roll 5 without reaching the take-up cradle roll 6a. The tip of the crude steel strip S is not formed into the required oval shape at the initial stage of winding.

In order to make the tip circular, use bending roll 3.
When the lower pressure r is increased, the force direction bends from - to F, and the tip comes into contact with the forming roll 5.

As a result, in the conventional coil box, there are restrictions on the thickness and temperature of the crude steel strip that can be wound, and it is difficult to wind a thin crude steel strip or a crude steel strip that is easily heated.

[Means for solving problems]

A coil box is installed on a conveying line for the rough steel strip, and the winding shift ripple roll and forming roll of the coil box are installed on a table that moves in the conveying direction of the crude steel strip.

When the thickness of the crude steel strip is thin, or when the rigidity is high and the rigidity is low, the above table is moved to the entrance table side, and the take-up shrift roll and forming roll are positioned below the bending roll. By doing so, winding can be started smoothly. As the winding progresses, the table is moved toward the exit table and the winding is completed.

〔Example〕

An embodiment of the present invention will be explained with reference to FIGS. 1 to 3.

As shown in FIG.
4 and 7, an opening roll 5, a take-up cradle roll 6, a transfer 7, and an unwinding cradle roll 8. The equipment is similar to that of

As details are shown in FIGS. 2 and 3, the mobile platform 1
oa can be moved by the cylinder 10c on the rail 10b in the conveyance direction of the crude steel strip S). The moving table 10h has 6 cradle rolls and 6 cradle rolls for 1 winding.
An elevating frame 6C supporting the elevating frame 6c parallel to the axis, a cylinder 6d driving the elevating frame 6c, and a forming roll 5 are attached. And moving table 101
The position of L is detected by a position detector 10d.

A blister copper strip S rolled or cast by a rough rolling mill or a continuous thin slab caster is transferred to a coil box by an entry table 1 in the direction of the arrow.

After being carried to the bending roll 3 above by the defuncter roll 2, the tip of the bending roll 3 is bent downward so as to have a predetermined inner diameter of the winding coil, and the tip is bent downward to form the forming roll 5 and the winding roll 3. Cradle roll 6
At the beginning of the winding process, the shape changes from a rabbit shape as shown by C1 to a shape of C1 as it is wound in the direction of arrow B.
! It is formed into a circular coil as shown in .

In this case, at the beginning of this winding process, in order to help form a good coil, the positions of the forming roll 5 and the winding cradle roll 6 are adjusted depending on the thickness, temperature, material, etc. of the blister copper strip S. The movable table 10n is moved in a direction parallel to arrow G and set at the optimum position for the picking operation. The forming roll 5 and the cradle rolls 6a and 6b for winding shown by dashed lines in the figure indicate the set positions at the beginning of the winding process.

As the outer diameter of the coil C1 increases during winding,
The moving table IQ is moved intermittently or continuously in the direction of arrow G, and winding is continued while avoiding interference between the coil C1 and the bending roll. The moving platform 10a during this time
The position of is detected and displayed by the position detector 10d. This position is indicated by the hatched forming roll 5 and the winding υ cradle rolls 6a and 6b in the figure.

When the coil C2 that is being wound once reaches a predetermined outer diameter, the winding cradle roll 6 is lowered in the direction of arrow C, and the coil that has reached the position shown in C1 is transferred to two winding cradle rolls 6a. and 6bK to support and wind up.

After winding, the coil C1 is rotated by the winding cradle 6 in the direction of the arrow F, which is the opposite direction of the direction shown by the arrow B, and the tail end of the outer periphery is opened by the opener 4, as in conventional equipment. Then it is rewound and exit table 9f! r: While being supplied from the tail end at the time of winding in the direction of the arrow G to the equipment to be connected via the wire, the film is placed on the unwinding cradle roll 8 by the transfer 7 and is subsequently unwound.

〔Effect of the invention〕

As described above, according to the present invention, a rough rolled steel strip roughly rolled in a rough rolling mill or a thin slab cast in a continuous thin slab casting machine is rolled up, and then unrolled and hot rolled. The hot rolling mill (main rolling mill) is supplied to the finishing rolling mill by means of a jill installed on the side of the rolling mill. This makes it possible to wind up thin or high-temperature rough rolled steel strips or thin slabs, which has been a problem.

As a result, it is now possible to select the thickness and temperature of the rough-rolled copper strip or thin slab from a wider range than before, as well as the speed of the rough rolling mill or continuous thin slab caster. It makes it possible to stabilize single-piece continuous casting and hot rolling operations, improve the quality of hot-rolled steel strips, and expand the variety of products that can be manufactured, resulting in excellent industrial effects.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention. Fig. 2 is a plan view of the circumference of the movable table, Fig. 3 is a sectional view taken along the line ■-m of Fig. 8g2, and Fig. 4 is a conventional It is an explanatory diagram of equipment. 1...Entry side table, 2...Deflector roll,
3...Bending roll, 4...Opener, 5
... Forming roll, 6... Credle roll for winding, 7... Transfer, 8... Cradle roll for unwinding, 9... Output table, 10 &...
Mobile platform. Applicant's representative - 7P Physician Takehiko Suzue Figure 2 Figure 3 Procedure amendment 1. Display of the case Japanese Patent Application No. 61-174560 2, Name of the invention Coil Box 3, Person making the amendment Relationship to the case Patent applicant (412) Nippon Kokan Co., Ltd. 4, Agent 3-7 Kasumigaseki, Chiyoda-ku, Tokyo No. 2 UBE Building 7,
Contents of the amendment (1) "Plastic" written on page 3, line 17 of the specification is corrected to "mark type." (2) The rGJ written in the 10th line and the 15th line of page 8 above is corrected to rHJ. (3) Figures 1 and 2 of the attached drawings are corrected as shown in the attached sheets.

Claims (1)

[Claims] 1. A coil box installed on a crude steel strip conveyance line, characterized in that a winding cradle roll and forming roll of the coil box are installed on a table that moves in the crude steel strip conveyance direction.