JPH05293526A - Side guide used by rolling equipment and method for using the guide - Google Patents

Abstract

PURPOSE:To restrain the nose of a long size bar from being bent by pressing, holding a material to be rolled in a width direction on the upper stream of a long size guide and coinciding the center in the width direction to the center between edger rolls. CONSTITUTION:First, when the tip part of the long size bar S to be rolled is entered into long size guides 3a, the guides 3a are moved in such a direction that they approach each other and when the tip of the long size bar S is bent, it is held, pressed and straightened by the guides as far as it is not deteriorated in shape and the center of the width is coincided with the center P between the rolls. At the same time with it, the subguides 3b, 3c are moved so that they approach each other, the long size bar S is held by each subguide 3b, continuously, each subguide 3b, 3c is moved so that the center in the width direction of the long size bar S coincides with the center of the rolling pass line P and the compressed state by each guide 3a, 3b, 3c is dissolved to be sent to the edger 1, the rolling mill 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side guide used for rolling equipment and a method of using the guide.

[0002]

2. Description of the Related Art Conventionally, various proposals have been made regarding a side guide used in rolling equipment and a method of using the guide, and a literature relating to this is disclosed in, for example, JP-A-3-230804. Reference is made to technology.

The technique disclosed in the above publication discloses a lateral bending (hereinafter referred to as a tip nose bending (See Fig. 5), the amount of deviation between the width center of the material to be rolled and the center of the roll of the edger is detected, the vertical roll is shifted based on this amount of deviation, and the vertical roll is covered by this vertical roll. With the rolled material bited, the vertical roll is returned to the initial position to perform rolling by the horizontal mill (see Fig. 4). According to this, the material to be rolled bites the edger diagonally. It was said that it would not get caught and could effectively reduce the nose bend.

[0004]

By the way, the above method is effective for the material to be rolled in which the tip nose bending is not yet generated, but it is rolled multiple times by the edger and the horizontal mill, When targeting a member that has already had a tip nose bend, it is difficult to accurately detect the amount of deviation between the width center of the member and the center of the rolling pass line by distinguishing it from the tip nose bend amount. It was not always an effective preventive measure.

Further, a long material to be rolled (for example, a width of 800 to 18 is used in the latter stage of the rough mill of the hot strip mill).
00 mm, thickness 30 to 100 mm, length 20 m or more, hereinafter simply referred to as a long bar. It has been newly found that the rolling using) has the following problems.

That is, conventionally, a guide having a length of about 7 m along the longitudinal direction of the material to be rolled is arranged on the edger entrance side of the rolling line using the long bar as described above. It was arranged such that the rolled material was pinched and moved so that the center between the rolls of the edger and the center of the long bar in the width direction were aligned with each other, and then the material to be rolled was caught in the edger.

However, in rolling a long bar, the center in the width direction of the bar and the center between the rolls of the edger match only in the portion where the guide is present and in the vicinity thereof, and the rolling of the long bar is performed. When the restraint of the guide is released in order to proceed, the elastically deformed portion is recovered, so that the long bar comes to be bitten in an oblique state, and there is a problem that the tip nose bends (Fig. 6A). ~
(See C).

An object of the present invention is to provide a rolling machine provided with a combination of an edger equipped with a vertical roll and a rolling mill arranged on the exit side of the edger (hereinafter, this rolling mill is referred to as a horizontal mill). The present invention proposes a side guide and a method of using the side guide, which can effectively prevent the tip nose bending that cannot be avoided in a line, particularly for a long bar.

[0009]

According to the present invention, there is arranged a rolling mill having an edger for controlling the widthwise rolling of a material to be rolled and a rolling mill for rolling down the material to be rolled through the edger in the thickness direction. On the entrance side of the equipment, the rolled material is sandwiched on both sides and the widthwise center and the center of the edger roll are aligned. A side guide used for rolling equipment, comprising at least one set of sub-guides for pressing or sandwiching the material in the width direction to match the center in the width direction with the center between the rolls of the edger (first invention). )
Is.

Further, according to the present invention, an edger for controlling the widthwise reduction of the material to be rolled and a rolling mill for controlling the thicknesswise reduction of the material to be rolled which has passed through the edger are arranged at the entrance side of the rolling equipment. , A long guide that sandwiches the rolled material on both sides to match the center in the width direction with the center between the rolls of the edger, and presses or clamps the rolled material in the width direction upstream of this long guide Place a side guide consisting of at least one set of sub guides that match the center in the width direction with the center between the rolls of the edger, and sandwich the material to be rolled on both sides with a long guide to correct the bending of the tip. The center in the width direction of the area is matched with the center between the rolls of the edger, and at the same time, the side edge of the material to be rolled is pressed or pinched by the sub guide so that the center in the width direction of the material to be rolled is edged. A side guide Using used in rolling equipment which is characterized in that to match the center between the rolls (second invention).

FIG. 1 shows the structure of a side guide according to the present invention. In the figure, reference numeral 1 denotes an edger for rolling down a long bar S which is a material to be rolled.
Is equipped with vertical rolls 1a and 1b. Reference numeral 2 denotes a rolling mill arranged on the exit side of the edger 1. The rolling mill 2 rolls down the material S to be rolled in the thickness direction. Reference numeral 3 denotes a side guide. The side guide 3 includes a long guide 3a arranged in the vicinity of the entrance side of the edger 1 and sub guides 3b, 3c (vertical guides) arranged upstream of the long guide 3a. A roller type or a plate type extending along the longitudinal direction of the rolled material S can be applied. Here, a vertical roller type is used.
It is shown as an example of a combination arrangement. ), Each of which is a pair of left and right, and is individually movable in the width direction of the long bar S (the drive mechanism is omitted).

[0012]

In order to perform rolling of the long bar S by applying such a guide, the tip portion of the long bar S to be rolled is shown in FIG.
As shown in FIG. 3, when the guides 3a enter the long guide 3a, the guides 3a are moved toward each other so that the long bar S
If there is a bend at the tip of the sheet, it is squeezed to correct it by pressing within a range that does not cause shape deterioration, and then, as shown in FIG. 2B, the center of the width is rolled with the long bar S being held. Match the center P between. At the same time, the sub-guides 3b and 3c are moved toward each other so that the long bar S is sandwiched between the sub-guides 3b, and the center of the bar S in the width direction is continuously rolled. Each sub guide 3b, 3 so as to match the center of P
c and move each guide 3 as shown in FIG.
The pinched state by a, 3b, and 3c is released, and it is sent to the edger 1 and the rolling mill 2.

According to the above-mentioned procedure, even a member such as a long bar can be accurately centered over its entire length. Therefore, in order to make the long bar bite into the edger, the pinching pressure by the guide is released. Even if the tip end of the long bar does not recover to its original state due to elastic deformation, it can be bitten into the edger in a state where the centers of the rolls coincide with each other. I)
The tip nose bend peculiar to this type of rolling, which occurs in situations such as (d), can be effectively reduced.

In order to roll a long bar which is not yet bent at the tip, which is used at the beginning of the hot rough rolling stage, it is not necessary to use the long guide 3a as described above, so that the length of the guide 3a is long. May be relatively short, or may be like the sub-guides 3b and 3c, but the bend at the tip of the long bar S is not limited to the edger 1.
The length of the guide 3a (L _{2 in} FIG. 1) is effective for straightening this bending because it occurs at a length corresponding to the distance L ₁ from the rolling mill 2 to the rolling mill 2 (see FIG. 1). Should be longer than the distance from the edger 1 to the rolling mill 2. In addition, the long guide 3a, the sub guide 3
The respective arrangement intervals of b and 3c (L ₃ and L _{4 in} FIG. 1) are
It is particularly desirable that the length can be changed appropriately according to the length of the material to be rolled. It should be noted that the facing distance between the long guide 3a and the sub guides 3b, 3c at the initial positions is such that the material S to be rolled can be quickly dealt with.
It is preferable that the width is about 100 mm wider than the width.

[0015]

Examples L ₁ : 3 m, L ₂ : 10 m, L ₃ : 14 m,
L _4: 14m to the above using a rolling mill arranged side guides as shown in掲図1, width 800 ～1800Mm, thickness 30
~ 100mm, length of 10 ~ 50mm material to be rolled (material: low carbon steel) hot rolling under the temperature of 1100 ~ 900 ℃ (rolling condition 7 passes rolling with horizontal rolling mill, odd pass Width reduction was carried out at the end of the rolling mill.
We investigated the occurrence status of (0 mm or more). The results are shown in Table 1. Note that L in the table indicates the length of the material to be rolled.

[Table 1]

As is clear from Table 1, it was confirmed that when the rolling using the side guide according to the present invention is performed, the occurrence rate of tip nose bending is extremely small even when a long rolling material is targeted.

[0017]

According to the present invention, it is possible to advantageously suppress the nose bend at the tip, which has been observed in rolling using a rolling facility including a combination of an edger and a rolling mill.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a side guide according to the present invention.

FIG. 2A to FIG. 2C are diagrams showing an operating procedure of a side guide.

3 (A) to 3 (D) are diagrams showing the occurrence of bending of the tip nose.

FIG. 4 is a diagram showing a procedure for preventing tip nose bending according to a conventional method.

FIG. 5 is a diagram showing an example of tip nose bending.

6 (a) to 6 (c) are diagrams showing a state of elastic deformation of a material to be rolled.

[Explanation of symbols]

 1 Edger 2 Rolling machine with horizontal rolls 3 Side guide 3a Long guide 3b Sub guide

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Toshisada Takechi Inventor 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside the Chiba Steel Works, Kawasaki Steel (72) Inventor Takao Yuke 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Kawasaki Steel Co., Ltd.Chiba Works

Claims (2)

[Claims] 1. An inlet side of a rolling facility comprising an edger for controlling a widthwise reduction of a material to be rolled, and a rolling mill for controlling a thicknesswise reduction of the material to be rolled passing through the edger. The rolled material is sandwiched on both sides and the center in the width direction is aligned with the center between the rolls of the edger. A pair of left and right long guides, and the material to be rolled is pressed or pinched in the width direction upstream of this long guide. A side guide used for rolling equipment, which comprises at least one set of sub-guides that match the center in the width direction with the center between the rolls of the edger. 2. A rolling mill is provided at the entrance of a rolling facility in which an edger for rolling down the rolled material in the width direction and a rolling mill for rolling down the rolled material passing through the edger are arranged. Insert the material on both sides and match the center in the width direction with the center between the rolls of the edger.A pair of left and right long guides, and press or hold the material to be rolled in the width direction upstream of the long guides. A side guide including at least one set of sub-guides for aligning the center in the width direction with the center between the rolls of the edger is arranged, and when the tip of the material to be rolled reaches the long guide, the long guide is rolled. The rolled material is sandwiched by the guides on both sides to correct the bending of the tip and the center of the width direction in that area is aligned with the center between the rolls of the edger, and at the same time, the sub guide guides the rolled material in the width direction. The center of A method of using a side guide used in a rolling facility, which is characterized by matching the centers of rolls of an edger.