JP3189919B2 - Width reduction press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a width reduction press, and more particularly to a width reduction press effective for buckling of an end of a slab material.

[0002]

2. Description of the Related Art As a device for adjusting the width of a slab material, a width reduction roll device and a width reduction press device have been conventionally used. Among these, the width reduction press device (slab sizing press device) has a large contact length between the mold and the slab, and the width reduction is performed with this long contact length. There is utility that a reduction amount can be obtained. For this reason, means for producing a strip (rolled material) by combining a width reduction press with a horizontal rolling facility has been conventionally used.

[0003]

However, when a large width reduction is performed by the width reduction press, there is a problem that the slab buckles in the vertical direction during the reduction. When such buckling occurs, it is impossible to further reduce the width, and it is necessary to correct the buckling deformation in subsequent horizontal rolling.

[0004] In order to solve such a problem, a conventional "method and apparatus for width reduction of hot slab" (Japanese Patent Publication No. 4-62)
No. 803), "A device for preventing buckling of a width reduction press" (JP-A-1-317603), a "slab sizing press" (Japanese Patent Application No. 3-315040) and the like have been proposed.

[0005] The method disclosed in Japanese Patent Publication No. 4-62803 is provided with "a pressing means which is separated and fixed at at least two positions A and B in the slab transport direction". Although it is intended to prevent buckling, since the position of the pressing means (for example, pressing roller) is fixed in the slab conveyance direction, the width is wide (for example, 2000 mm or more) even if the width of the narrow slab can be adjusted under the pressure. At the time of width reduction of the slab, there was a problem that buckling of the slab other than the central portion could not be prevented.

The buckling of slabs is shown in FIGS.
There is a buckling form as exemplified in (c), and the buckling load is the smallest (a), the largest (c), and the width reduction amount is small like a conventional width reduction press device (for example, (350 mm on both sides), buckling in the form of (a) is common, and buckling could be suppressed by providing a pressing means at the center of the slab. However, when the slab width is large or the width reduction amount is large, the width reduction force is also large, and buckling occurs in the forms shown in FIGS. 3B and 3C. For this reason, buckling in such a form could hardly be suppressed by the pressing means at the center.

JP-A-1-31760 does not even suggest such a problem. That is, the apparatus according to the present invention merely includes the “plurality of pressing rolls” in the slab conveyance direction, and is not intended to cope with the buckling mode.

The device disclosed in Japanese Patent Application No. 3-315040 has "an auxiliary press roll provided on both sides of the main press roll in the axial direction", and is capable of coping with the buckling of the above-mentioned form (b) or (c) to some extent. can do. However, the width position of the auxiliary press roll is fixed, and when the slab width changes, buckling cannot be suppressed at the optimum position in the width direction.

The slab material is usually about 5 to 10 m long and has a front end and a rear end. Both ends are liable to buckle against the width reduction force. For this reason, it was necessary to pay particular attention to the width reduction at both ends and perform the operation.

The present invention has been made in view of the above problems, and can prevent buckling even when the slab is wide and the amount of width reduction is large, and can prevent buckling at the front and rear ends. An object of the present invention is to provide a width reduction press device.

[0011]

In order to achieve the above object, the present invention relates to a width reduction press device for reducing a slab in a width direction by a width reduction die, provided between the width reduction dies, A pair of main pressing rolls vertically sandwiching the center in the width direction of the slab, and provided on at least one of the entrance side and the exit side of the width reduction die, can be moved in the width direction and the conveyance direction of the slab, and can be moved above the slab. The provided upper pressing roll, provided on at least one of the entrance side and the exit side of the width reduction die, can be moved in the width direction and the conveyance direction of the slab,
And a lower press roll provided below the slab.

Further, when the pressing of the front end or the rear end of the slab is performed, the upper pressing roll and the lower pressing roll are moved corresponding to the end of the slab in accordance with the pressing of the slab end.

[0013]

According to the configuration of the present invention, the buckling mode shown in FIG. 4A can be suppressed by the pair of main pressing rolls sandwiching the slab provided at the center in the slab width direction.
In the case of the buckling mode shown in (b) and (c), the position of occurrence varies depending on the slab width, but the upper holding roll and the lower holding roll are each plural, and can move independently in the slab width direction. Accordingly, the buckling modes (b) and (c) can also be suppressed.

When the width of the slab end at the leading end or the trailing end of the slab is reduced, the upper holding roll and the lower holding roll are moved to the leading or trailing end of the slab and also in the width direction. ) And (c) can suppress the end buckling of all the forms.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a width reduction press apparatus according to an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a side view. FIG.
(A) shows a view on arrow XX of FIG. 1 (b), and FIG. 2 (b)
1 shows a view taken in the direction of the arrow YY in FIG. The width reduction press apparatus according to the present embodiment includes a pair of width reduction molds 2 that reduce the slab 1 in the width direction, and a pair of upper and lower dies provided between the width reduction molds 2 at the center of the slab 1 in the width direction. A pair of main presser rolls 10
And two upper pressing rolls 12 provided on the entry side of the width reduction die 2 and three lower holding rolls 15 provided on the entry side of the width reduction die 2.

The main pressing roll 10 sandwiches the central portion of the slab 1 in the width direction as a pair of upper and lower parts, and effectively suppresses the buckling mode shown in FIG. The pressing force on the slab 1 is performed by a hydraulic cylinder 11 that operates vertically, and the pressing force is adjusted by controlling the hydraulic pressure.
As shown in FIG. 3, the main holding roll 10 is configured to be able to swing between a holding position (solid line) and a separation position (dashed line position) around the fulcrum 10a, and can be retracted to the separation position as necessary. .

The upper pressing roll 12 generates a pressing force by a vertical hydraulic cylinder 13. The upper pressing roll 12 and the hydraulic cylinder 13 are stored in a transport unit 14, and the transport unit 14 is configured to be movable on the horizontal frame 18 in the slab width direction. A traversing cylinder 20 is provided in the traversing frame 18 to cause the transport unit 14 to traverse. The horizontal frame 18 is configured to be movable in the slab transport direction on the vertical frame 19, and is moved in the slab transport direction by the vertical cylinder 21 provided in the vertical frame 19.

The lower pressing roll 15 generates a pressing force by a vertical hydraulic cylinder 16. The lower pressing means 15 and the hydraulic cylinder 16 are stored in the transport unit 17. The other configuration is the same as that of the upper press roll 12. The transport unit 17 is traversed on the traversing frame 18 by the traversing cylinder 20, and the traversing frame 18 is moved on the longitudinal frame 19 by the traversing cylinder 21 in the slab transport direction. I do. However, the lower presser roll 15 consists of three pieces, and the lower presser roll 15 at the center is fixed to the center of the traverse frame 18 and does not move in the traverse direction.

Upper press roll 12, lower press roll 15
Also, as shown in FIG. 3, the holding position (solid line) and the release position (broken line position) can swing about the fulcrums 12a and 15a, and can be retracted to the release position as needed.

Upper holding roll 12, lower holding roll 15
Can be moved to any position in the slab width direction by operating the traversing cylinder 20, and the buckling forms of (b) and (c) shown in FIG. 4 are effectively suppressed. The center roll 15 of the lower presser roll 15 does not move (c)
Works effectively against the buckled form of.

When the width reduction approaches the rear end of the slab 1, the upper pressing roll 1
2. The horizontal cylinder 20 and the vertical cylinder 21 are positioned so that buckling occurring at the rear end of the lower presser roll 15 can be suppressed.
To prevent buckling from occurring at the rear end of the slab.

In this embodiment, the upper pressing roll 12 and the lower pressing roll 15 are provided only on the entry side of the width reduction die 2, but by providing them also on the exit side, buckling of the slab tip can be effectively suppressed. Can be.

[0023]

As is apparent from the above description, the present invention provides a pair of upper and lower main pressing rolls for sandwiching a slab at the center of the slab width between the width reduction dies, and the entrance and exit of the width reduction die. At least one of the sides has a plurality of upper holding rolls and a plurality of lower holding rolls, which can be moved not only in the slab width direction but also in the transport direction, so it occurs over the entire length of the slab from the leading end to the trailing end of the slab. The buckling due to the width reduction can be suppressed. Further, since both the upper holding roll and the lower holding roll can move in the slab width direction, buckling can be effectively suppressed even if the width of the slab changes.

[Brief description of the drawings]

FIG. 1 shows a plan view and a side view of a width reduction press device of the present embodiment.

FIG. 2 is a view taken along arrows XX and YY of FIG. 1 (b).

FIG. 3 is a diagram for explaining a detached position of a main press roll, an upper press roll, and a lower press roll.

FIG. 4 is a diagram illustrating a buckling mode generated by a width reduction press.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Slab 2 Width reduction die 10 Main holding roll 12 Upper holding roll 15 Lower holding roll 14, 17 Conveying unit 18 Horizontal frame 19 Vertical frame 20 Horizontal cylinder 21 Vertical cylinder

Continuation of the front page (72) Inventor Setuma Matsunuma 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Pref. Ishikawajima-Harima Heavy Industries, Ltd. Yokohama No. 2 Factory (56) References JP-A-6-210314 (JP, A) JP-A-5-154501 (JP, A) JP-A-3-81007 (JP, A) JP-A-62-270245 (JP, A) JP-A-3-81201 (JP, U) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) B21B 15 / 00,1 / 02

Claims (2)

(57) [Claims] 1. A width reduction press device for reducing a slab in the width direction by a width reduction die, a pair of main presses provided between the width reduction dies and vertically sandwiching a central portion of the slab in the width direction. A roll, an upper holding roll provided above the slab, provided on at least one of the entrance side and the exit side of the width reduction die, and capable of moving in the width direction and the conveyance direction of the slab; It is provided on at least one of the entry side and the exit side, and is movable in the width direction and the transport direction of the slab,
A width reduction press device comprising a lower press roll provided below the slab. 2. The method according to claim 1, wherein the upper press roll and the lower press roll are moved corresponding to the end of the slab when the press of the front end or the rear end of the slab is performed. The width reduction press device according to claim 1.