JP3252943B2 - Board widening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin slab continuous casting apparatus, a widening apparatus for widening a sheet width of a steel sheet, a non-ferrous material or the like manufactured by a twin roll caster.

[0002]

2. Description of the Related Art Conventionally, a sizing press for slabs has been put to practical use as a device for changing a plate width.
There has not yet been a thin slab continuous casting machine (CC), a machine for changing the width of a steel plate or a non-ferrous strip manufactured by twin roll casters. For this, thin slab CC,
In order to change the width of a steel plate or the like manufactured by a twin roll caster, the mold of the thin slab CC and the roll of the twin roll caster were changed.

[0003]

In the above-mentioned conventional method for changing a mold or the like, the thin slab CC, the twin-roll caster, and the like must be stopped, which requires a lot of time and effort. SUMMARY OF THE INVENTION An object of the present invention is to provide a plate widening apparatus capable of changing a plate width without changing a mold or the like.

[0004]

In order to achieve the above object, a widening apparatus for a plate according to the present invention comprises a plurality of convex or concave crown rolls having different shapes arranged vertically in a staggered manner. After that, the flat rolls were arranged vertically.

[0005] The plate widening apparatus of the present invention will be described in further detail. The crown roll may be either a convex crown roll or a concave crown roll, and is deformed into a plate to be processed as shown in Figs. Is gradually added. That is, the convex type crown roll used first has only the central portion formed with a convex portion, and the subsequent type used gradually increases the width of the central portion of the convex portion. The concave crown roll used first is provided with a large concave portion in the center portion, and the later used is one in which the width of the central concave portion is gradually reduced. The number is the board width,
It is determined according to the width to be widened, but if a large number of rolls are installed, it is possible to handle from a narrow width to a wide width by selecting a crown roll to be used. The number of the flat rolls may be usually two, but may be three or more when it is necessary to adjust the thickness. further,
The apparatus for widening a plate of the present invention is preferably used in-line with a thin slab CC and a twin roll caster, but can also be used for other applications for widening a plate. In addition, a roll peripheral speed follows the following formula. Vi> (S _{i + 1} / S _i ) · V _{i + 1} (1) S: sectional area V: roll peripheral speed

[0006]

When a convex crown roll is used in the plate width expanding apparatus of the present invention, the width of the thin portion is gradually widened from the center portion, and finally the thick portions at both ends are rolled by flat rolls. , Resulting in a wide plate. When a concave crown roll is used, the width of the thin wall is gradually widened from both ends, and finally, the thick part at the center is rolled by a flat roll to form a wide plate. In this operation, since the roll peripheral speed of the expression (1) is adopted, the widthwise flow of the plate is easily caused. Also, as shown in FIG. 1 and FIG. 4, if a large number of crown rolls are formed so as to gradually apply deformation to the plate to be processed, the width of the plate using a convex crown roll is increased. In the case of a narrow plate, the width can be increased by using a convex crown roll installed at the front. In this case, since the subsequent convex crown roll serves as a flat roll, there is no need to provide a flat roll in the middle. The widest plate can be widened by using an entire convex crown roll. Further, in a plate width expanding device using a concave crown roll, in the case of a narrow plate, the width can be increased by using a concave crown roll at the rear. The widest plate can also be widened by using the entire concave crown roll.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a preferred embodiment of the present invention. Example 1 The convex crown rolls 1a to 4a shown in FIG. 1 were arranged as shown in FIG. 2, and the flat rolls shown in 5a and 6a in FIG. 1 were arranged as 5a and 6a in FIG. A widening device was constructed. FIG. 3 shows a change in the cross-sectional view of the rolled material when rolling is performed by this apparatus. A to F and S _{1 to} S ₆ in FIG.
3 is a cross-sectional shape and a cross-sectional area at points a to f in FIG. 2. Example 2 A plate in which the concave crown rolls 1b to 4b shown in FIG. 4 were arranged as shown in FIG. 5, and the flat rolls shown in 5b and 6b in FIG. 4 were arranged as 5b and 6b in FIG. A widening device was constructed. FIG. 6 shows a change in the cross-sectional view of the rolled material when rolling is performed by this apparatus. M to R and S _{1 to} S ₆ in FIG.
3 is a cross-sectional shape and a cross-sectional area at points m to r in FIG. 2.

In the above embodiment, four convex or concave crown rolls are used, but the type of rolled material, the width of the rolled material,
It can be increased or decreased as appropriate according to the width to be expanded. However, if a large number is installed, it is possible to cope with a narrow plate width to a wide plate width.
Further, the present invention is not limited to only the above-described ones, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[0009]

According to the present invention, the above-described configuration enables
It has the following excellent effects. (1) The width of the strip that could not be obtained conventionally can be increased. (2) Since the width of the thin slab CC material can be changed in-line, it can be changed quickly. (3) The number of molds or twin rolls can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a convex-type crown roll used in the apparatus for widening a plate according to the present invention.

FIG. 2 is an explanatory side view of a crown roll portion of the apparatus for widening a plate using the convex crown roll of the present invention.

FIG. 3 is a cross-sectional view of the rolled material at points a to f in FIG. 2;

FIG. 4 is a front view of a concave crown roll used in the apparatus for widening a plate according to the present invention.

FIG. 5 is an explanatory side view of a crown roll portion of the apparatus for widening a plate using the concave crown roll of the present invention.

FIG. 6 is a cross-sectional view of the rolled material at points m to r in FIG.

[Explanation of symbols]

1a-4a Convex Crown Roll 1b-4b Concave Crown Roll 5a, 6a, 5b, 6b Flat Roll A-F Cross Sectional View of Rolled Material Using Convex Crown Roll, and Cross Section S _i M-R Concave Crown Cross section of rolled material when using rolls, and cross section S _i

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21B 13/22 B21B 1/26 B21B 27/02 B22D 11/12 B21B 1/46 B22D 11/128

Claims (1)

(57) [Claims] 1. Crown rolls having different shapes (1a, 2a, 3a, 4a, 1b, 2b, 3b, 4b)
Are placed in a zigzag pattern up and down, and then flat roll
(5a, 6a, 5b, 6b) are arranged up and down.