JPH0523713A - Edge rolling for H-section steel rolling - Google Patents

Abstract

(57) [Summary] [Objective] In an edging roll for rolling H-section steel, it is possible to change the width and the dimension in the radial direction, and to produce H-section steel with stable dimension and shape without fluctuation of the leg length dimension. [Structure] Web restraining rolls 3a and 3b are axially divided into two and are attached to a main shaft 2 so as to be movable in the axial direction, and flange rolling rolls 4a and 4b are eccentric sleeves 6a that are attached to the main shaft 2 so as to be rotatable. , Bearings 5a on the outer diameter of 6b,
It is attached via 5b. Web length L of H-section steel 1
Then, the positions of the web restraint rolls 3a, 3b in the width direction are determined, and the eccentric amounts of the eccentric sleeves 6a, 6b are determined according to the width of the flange or the leg length H of the H-section steel 1. The web restraint rolls 3a and 3b and the flange rolling rolls 4a and 4b can be integrally moved in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edging roll for rolling H-section steel, and in particular, a combination rolling comprising a combination of a universal rolling machine and an edger rolling machine used when hot-rolling H-section steel or the like. The present invention relates to an edger roll suitable for being installed in an edger rolling machine for material.

[0002]

2. Description of the Related Art In the case of producing H-section steel by hot rolling mainly from blooms and beam blanks produced by continuous casting, a rolling material for shaped steel is efficiently rolled to a target size and shape. Therefore, a universal rolling mill group (hereinafter referred to as a U-mill group), which is a combination of a universal rolling mill and an edger rolling mill, has been usually used.

[0003] The edger rolling machine has a role of rolling down H-shaped steel so as to have a predetermined width dimension while suppressing the collapse of the flange portion, particularly in rolling H-section steel. As such a rolling mill, for example, a housing separate from the housing of the universal rolling mill is provided, and rolls 41, 42 for constraining the web surface, the flange surface and the flange end surface of the rolling material at one time are provided. No. 63-260610 (see FIGS. 4 and 5) or a universal rolling mill housing with a drum-shaped edger roll and a rolling roll 43 for restraining only the flange end face of the rolling material. The one disclosed in Japanese Patent Laid-Open No. 63-303604 (see FIG. 6) and the like which has an attached edger type has been conventionally known.

Regarding the rolls shown in FIGS. 4 and 5,
Depending on the size of the rolled material, the web portion may not be constrained, and the guide may become unstable, resulting in dimensional variations. Further, the edging rolling using the above rolls has the following problems.
Rolling material such as slab 44, bloom 45 or beam blank 46 as shown in FIG. 7 obtained by continuous casting is heated to a predetermined temperature in a heating furnace 50 as shown in FIG. 8 and rough-rolled. Rolling machine, rolling to a crude billet for a shaped steel having a web and a flange, and then performing reverse rolling a plurality of times with a rough U mill 51 group and an edger rolling mill 52, and further using a finishing rolling mill 53 to roll While gradually reducing the thickness of the web and the flange portion, as shown in FIGS.
As shown in (c), rolling is performed in order to finish an H-section steel having a desired dimension. In this case, especially in the case of shaped steel used in construction, civil engineering, etc., it is a shaped steel of the same nominal size (constant web height, constant flange width) due to requests to reduce the materials used. Also tends to use different flange thicknesses and web thicknesses. The above-mentioned JP-A-63-
When edging rolling is performed using an edger rolling machine equipped with a roll as disclosed in Japanese Patent No. 260610, the dimensions of the H-section steel are fixed. Therefore, in order to roll an H-section steel having a constant web height with different web thicknesses and flange thicknesses on the same line, it is necessary to change the rolls every time the wall thickness or the like is changed. This takes a lot of time and work man-hours, and there is a disadvantage that productivity is significantly lowered due to the line stop.

By the way, in H-section steel having a web height of 600 mm and a flange width of 200 mm, the flange thickness is 1
Some have a thickness of 2 to 28 mm and a web thickness of 6 to 12 mm. The flange thickness has a maximum difference of 16 mm, and the web thickness has a maximum difference of 6 mm. For example, as shown in FIG. 10, even in the H-section steels having the same web height h, the section steels having different flange thicknesses t _{1 to} t ₃ are joined together to form a building structure or the like. When manufacturing, if one flange outer surface of the H-section steel is aligned with the flange outer surface of the other H-section steel, a large deviation z may occur on the other flange outer surface, which may cause a problem in construction.

[0006] In this respect, the above-mentioned Japanese Patent Laid-Open No. 63-303604.
With the edging roll disclosed in Japanese Patent Publication, even if the flange width is changed, edging rolling can be performed according to the size of the shaped steel to be rolled simply by adjusting the opening of the roll. However, since such an edging roll has a structure in which only the flange end surface of the rolled material is constrained, the guide of the rolled material becomes unstable, and the dimension from the web surface of the rolled material to the flange tip (hereinafter referred to as leg length) is Since there is a possibility that variations may occur in the vertical and horizontal directions and the flange may fall down, there is a drawback in terms of dimensional accuracy.

That is, when applying the hourglass-shaped roll for restraining only the flange end portion of the rolling material as shown in FIG. 6, a gap is created between the roll and the rolling material, so that the width center of the rolling material is When the roll center of the edging roll is misaligned, the amount of reduction during edging becomes inaccurate in the vertical and horizontal directions, and the rolling material sways to the left and right, leading to unstable guides and dimensional defects such as leg length variations. There is a possibility that a shape defect such as a fall of a flange or a flange may occur, and sometimes edging rolling may be disabled.

As an equipment capable of rolling an H-shaped steel having a constant web height even if the flange thickness is increased or decreased, for example, JP-A-59-202101 and JP-A-61-1726 are available.
No. 05 or Japanese Patent Laid-Open No. 61-262407 has been disclosed, but no proposal has been made so far for solving the above-mentioned problems in edging rolling.

[0009]

For example, as shown in FIG. 3, even if the web thickness ha and the flange thickness hb are different, the web height Hb and the flange width Ha are constant, so-called H-section steel having a constant outer dimension. The edging rolling mill as described above has various problems in order to manufacture the steel sheet without complicated operations such as replacement of the rolling rolls. INDUSTRIAL APPLICABILITY According to the present invention, H-section steels having a constant outer diameter dimension and different wall thicknesses can be rolled without replacement of rolls so as to meet the demands of customers, and the structure is relatively simple. The purpose is to propose a new edging roll.

[0010]

SUMMARY OF THE INVENTION The present invention is an edging roll used for rolling a shaped steel having a web and a flange, which has the following features. (1) The web restraint roll is divided into two in the axial direction and is fitted onto the main shaft so as to be slidable in the axial direction. (2) A flange rolling roll that rotatably fits over the outer diameter of an eccentric sleeve that is rotatably fitted around the main shaft and that regulates the width dimension of the flange of the rolling material is provided.

It is preferable that the edging roll for rolling shaped steel of the present invention further comprises an eccentric sleeve rotation drive device for rotating the eccentric sleeve relative to the main shaft to adjust the amount of eccentricity. It is more preferable to provide a width adjusting device that integrally moves the left and right web restraining rolls and the flange rolling rolls in the axial direction to change the width of the web restraining rolls.

[0012]

The web restraint roll of the present invention is divided into two parts, right and left, and is fitted onto the main shaft so as to be slidable in the axial direction.
By adjusting the opening degree of the left and right rolls, it is possible to immediately cope with the production of H-section steels having different web heights.
The flange rolling roll is rotatably fitted onto the outer diameter of the eccentric sleeve, and the eccentric sleeve is rotatable relative to the main shaft. Therefore, the flange rolling roll is eccentric within the range of the eccentricity e of the eccentric sleeve. The amount can be adjusted freely. Therefore, the width of the flange of the H-section steel can be rolled to a predetermined size, and the flange leg length H can be arbitrarily adjusted.

[0013]

1 and 2 show an example of an edging roll according to an embodiment of the present invention. In the figure, the H-section steel 1 is rolled by web restraint rolls 3a and 3b that restrain the web portion and flange rolling rolls 4a and 4b that regulate the width of the flange. These rolls 3 a, 3 b, 4 a, 4 b are fitted onto the main shaft 2. The flange rolling rolls 4a and 4b are bearings 5
The eccentric sleeves 6a and 6b are externally fitted via a and 5b, and are freely rotatable with respect thereto. The eccentric sleeves 6a and 6b are rotatably fitted on the outer diameters of the bosses adjacent to the web restraint rolls 3a and 3b. That is, it is fitted onto the main shaft so as to be rotatable relative to the main shaft.

The web restraint rolls 3a and 3b regulate the horizontal level change of the web 1a of the H-section steel 1 during rolling, and adjust the opening of the roll to keep the web height of the H-section steel 1 at a predetermined height. Regulate it. The flange rolling rolls 4a and 4b regulate the width of the flange 1b of the H-section steel 1 to a predetermined dimension and adjust the flange leg length H.
By rolling around the outer periphery of the body of a and 3b and moving up and down within the range of the eccentricity e, it is possible to cope with rolling of H-section steels having different flange widths and flange leg length dimensions. The eccentric sleeves 6a, 6b are used for the bearings 7a,
It is rotatably held by the web restraint rolls 3a and 3b via 7b.

Further, one end of the main shaft 2 is connected to a drive source spindle S for transmitting a torque required for rolling to the H-section steel 1 by means of the key 8 via the web restraint rolls 3a and 3b. The adjustment of the flange leg length H is achieved by rotating the eccentric sleeves 6a, 6b relative to the web restraint rolls 3a, 3b. This rotation is performed by the rotation of the pinion 10 that meshes with the gear 9 provided on the outer circumference of the eccentric sleeve. Further, a width adjusting device 20 is provided in order to cope with a change in the web height L of the H-section steel 1. This width adjusting device 20 is provided with a gear 22 at one end on the outer circumference of a sleeve nut 21 that meshes with a screw 11 provided on the main shaft 2, and the sleeve nut 21 is fixed to an eccentric sleeve 6b via a thrust plate 23. There is. The eccentric sleeve 6b is axially fixed to the web restraint roll 3b by a nut 18.

The sleeve nut 21 shifts the web-constraining roll 3b and the flange rolling roll 4b in the longitudinal direction of the shaft as a unit by rotating a gear 22 by a rotating device (not shown). Drive source 3 for rotating the pinion 10
1 and the bearing 34 of the drive shaft are roll chocks 32a, 32
It is placed on the supports 33a and 33b attached to b. Reference numeral 35 is a clutch. The numeral 15 in FIG. 2 is a scale seal. The web restraint rolls 3a, 3b and the eccentric sleeves 6a, 6b are fixed in axial movement by a clamp key 12. The clamp key 12 is fixed by presser plates 13 and 14. Eccentric sleeve 6a,
A liner plate 14 is provided for relative sliding between 6b and the flange rolling rolls 4a, 4b.

A lock device (not shown) is provided between the main shaft 2 and the sleeve nut 21 so that the roll does not move in the axial direction during rolling. In the present invention, the edging rolls are web restraint rolls 3a, 3
b and the flange rolling rolls 4a and 4b, the roll widths of the web restraining rolls 3a and 3b can be adjusted by the width adjusting device 20.
a, 4b and web restraint rolls 3a, 3b level difference H
By adjusting (corresponding to the flange leg length) in the range of twice the eccentric amount e, it can be applied to the edging rolling of H-section steels of various sizes. Therefore, it is not necessary to change the rolls even when rolling H-section steels having different flange leg lengths, different flange thicknesses, and a constant web height. Further, the shape of the H-section steel is not deformed during the edging rolling.

The edging roll of the present invention has a relatively simple structure, and the width and vertical level of the edging roll can be automatically adjusted using a process computer or the like. When the flange leg length (upper and lower level difference) H is changed, the pinion 10 is rotated by the rotation of the drive source 31 to rotate the gear 9 provided on the eccentric sleeve meshing with the pinion 10 and the eccentric sleeve to the web restraint roll. The flange leg length H can be arbitrarily adjusted by rotating the outer circumference of one end of 3a, 3b.

When adjusting the roll width L, the gear 22 provided on the sleeve nut 21 is rotated by a rotating device (not shown) to rotate the screw provided inside and the screw 1 provided on the spindle 1.
Since 1 is fitted, the web restraint roll 3a, the flange rolling roll 4a, and the eccentric sleeve 6a move integrally in the axial direction.

[0020]

As described above, according to the present invention, the roll width of the web restraining roll and the upper and lower levels of the flange width rolling roll constituting the edging roll can be arbitrarily changed by the instruction of the process computer or the like. Even if it is rolled, since the edging rolling can be performed while surely restraining the web portion and the flange portion of the rolling material, it is possible to prevent the quality deterioration due to this.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an edger rolling roll according to an embodiment of the present invention.

FIG. 2 is a detailed view of the edger roll of FIG.

FIG. 3 is a cross-sectional view of H-section steel.

FIG. 4 is a schematic view of a conventional edging roll.

FIG. 5 is a schematic view of a conventional edging roll.

FIG. 6 is a schematic view of a conventional edging roll.

FIG. 7 is a sectional view of a rolled material for H-section steel.

FIG. 8 is a schematic diagram of a suitable rolling facility for producing an H-section steel.

FIG. 9 is an explanatory diagram of an H-section steel rolling condition.

FIG. 10 is an explanatory view showing a situation in which H-section steels having different web heights are connected.

[Explanation of symbols]

1 H-section steel 2 Spindles 3a, 3b Web restraint rolls 4a, 4b
Flange rolling rolls 5a, 5b Bearings 6a, 6b
Eccentric sleeve 7a, 7b Bearing 9 Gear 10 Pinion 12 Clamp key 20 Width adjustment device 21 Sleeve nut 31 Drive source 32a, 32b
Roll chock

Claims (3)

[Claims] 1. An edging roll for rolling a shaped steel having a web and a flange, wherein a web-constraining roll which is axially divided into two parts and which is fitted onto a main shaft so as to be slidably movable in the axial direction, and a rotatably outer part which is rotatable around the main shaft. An edging roll for rolling H-section steel, comprising: a flange rolling roll rotatably fitted on the outer diameter of the fitted eccentric sleeve. 2. The edging roll for rolling H-section steel according to claim 1, further comprising an eccentric sleeve rotation drive device for rotating the eccentric sleeve relative to the main shaft. 3. The edging roll for rolling H-section steel according to claim 1, further comprising a width adjusting device for integrally moving the left and right web restraining rolls and the flange rolling roll in the axial direction.