JP3257456B2 - Guiding device for rolling section steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guiding device for rolling a shaped steel, and more particularly to a guiding device for rolling a shaped steel having a flange.

[0002]

2. Description of the Related Art A section steel having a flange, for example, an H section steel is generally manufactured by rolling with a universal rolling mill. In this rolling, as shown in FIG. Likely to happen. This is mainly due to an improper biting position of the web 11 with respect to the pass line in the universal rolling mill, and it is generally unavoidable that the web center is biased. Web center deviation S
Is defined by the following equation. S = | ab | / 2 where a, b: distance between flange end and web surface The deviation of the center of the web is a typical defect in the dimensional accuracy of H-section steel, and a requirement for this is required. Are becoming more and more severe these days.

In order to meet such a demand, for example, in Japanese Patent Publication No. 6-53289, a guide provided on the entrance and / or exit side of a universal rolling mill comprises a tapered flange guide roller and a web guide. 1 shows a configuration including a pair of blocks. This block is movable in the left, right, up and down directions. Such a guide guides the flange and the web of the material to be rolled while constraining it. However, when the flange width of the material to be rolled changes, only the flange guide roller is restrained, so that the deviation of the center of the web is controlled. Therefore, it is considered that a sufficient effect cannot be exhibited. Also, Japanese Patent Application Laid-Open No. 6-218413 discloses a configuration in which a flange guide roller and a web guide roller are individually installed, but the web guide roller does not approach the mill,
Since the distance between the mill center and the guide increases, there is a problem that the effect of controlling the deviation of the web center is reduced.

[0004]

The effect of controlling the deviation of the center of the web is affected by the distance L between the mill center and the flange guide roller as shown in FIG. The control effect decreases as L increases. Therefore, in order to make L as small as possible, the prior art attempts to install a flange guide roller as close to the mill as possible. However, it is very difficult to install the flange guide roller near the mill due to physical restrictions such as the housing of the stand. For this reason, a method is also conceivable in which the web restraining guide is configured to be extendable or slidable and restrains the material to be rolled close to the mill. However, in order to control the deviation of the web center by the web restraining guide, as shown in FIG. In addition, there is no effect unless the gap between the web restraining guide and the web of the material to be rolled is limited to at least 2 mm or less. Such severe gap control is not easy with an H-section steel having a non-stationary part (crop) at the tip, and problems such as poor shape due to bending of the material to be rolled and the material to be rolled clogged in the guide are encountered. More likely to occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it has been made possible to install a flange restraining guide for restraining a flange of a material to be rolled so as to be close to a mill center, thereby enabling a material to be rolled. It is an object of the present invention to provide a guiding device for rolling a shaped steel, which is particularly effective in enabling stable guiding of the steel sheet and reducing the amount of deviation of the center of the web.

[0006]

The guide device according to the present invention is installed on the entrance side and / or the exit side of a universal rolling mill for rolling a section steel having a flange, and restrains a flange and a web of a material to be rolled. A guiding device that guides the passage of the material to be rolled, and a flange guide roller and a flange restraining guide for restraining a flange end surface of the material to be rolled ;
Together provided vertically movably in a block, contracture the flange
The bundle guide is provided so as to be slidable in the flow direction of the material to be rolled so as to extend to the vicinity of the mill center.

Further, the flange restraining guide according to the present invention is made of a member having an L-shaped or groove-shaped cross section, and is provided between a long hole into which the flange guide roller is inserted and a vertically movable roller holding member which holds the flange guide roller. This is a configuration including an interposed slide mechanism.

With the above construction, the flange end face of the material to be rolled is sandwiched from above and below by a plurality of flange guide rollers and flange restraining guides, and the fillet portion is sandwiched from above and below by the fillet guide provided on the block, and the flange end face and the fillet respectively. The material to be rolled is guided to the universal rolling mill while restraining the section. Further, the flange restraining guide is capable of sliding in the flow direction of the material to be rolled so that the material enters the inside of the rolling mill housing from the outside while restraining the flange end face of the material to be rolled, and its entrance / exit end extends close to the mill center. Since the distance from the mill center to the flange restraining guide can be reduced as shown in FIG. 9, the control effect of the deviation of the center of the web is improved, and the variation of the amount of deviation of the center of the web is small, and the dimensional accuracy is high. Steel products can be obtained.

[0009]

FIG. 1 is a front view of a guidance device according to the present invention, and FIG. 2 is a sectional side view taken along line AA of FIG. In FIGS. 1 and 2, reference numeral 1 denotes blocks installed vertically and horizontally.
In each block 1, a plurality of non-driven flange guide rollers 2 for restraining the end face of the flange 12 of the material to be rolled 10 are provided so as to be vertically movable. Reference numeral 3 denotes a flange restraining guide for restraining the end face of the flange 12 of the material to be rolled, which is movable in the directions of arrows a and b as shown in FIG. Reference numeral 4 denotes a fillet guide for restraining the fillet portion 13 of the material to be rolled, and is integrally connected to the inner wall of the block 1. The blocks 1 can be independently moved in the vertical and horizontal directions by, for example, a vertical moving mechanism by a screw mechanism and a left and right moving mechanism.

The flange restraining guide 3 is made of a member having an L-shaped or groove-shaped cross section, and its horizontal portion 31 is provided with an elongated hole 33 into which the flange guide roller 2 is inserted.
The vertical portion 32 is provided with an elongated hole 34 into which the shaft 21 of the flange guide roller 2 is inserted. The constraining surface 35 that comes into contact with the flange end surface of the flange constraining guide 3 is set at the same height as the outer peripheral surface of the flange guide roller 2. The outer peripheral surface of the flange guide roller 2 and the constraining surface 35 of the flange constraining guide 3 can be tapered with the same inclination.

FIGS. 3 and 4 show an example of an elevating mechanism of the flange guide roller and a slide mechanism of the flange restraining guide. Here, the outer peripheral surface of the flange guide roller 2 and the restricting surface 35 of the flange restricting guide 3
Are shown with the same inclination taper. The lifting mechanism 5 of the flange guide roller 2 supports a plurality of flange guide rollers 2 and supports a channel-shaped roller holding member 51 provided in the block 1 so as to be movable up and down. The roller holding member 51 is vertically moved by a screw shaft 52. And a driving device 53 for driving the motor. The roller holding member 51 is vertically guided by a protrusion 54 and a groove 55 in which the protrusion 54 is engaged, or a guide pin and a hole (not shown). Further, as the slide mechanism 6 of the flange constraint guide 3, for example, a cylinder device is interposed between the roller holding member 51 and the flange constraint guide 3. It is sufficient that the flange restraining guide 3 is provided with at least the long hole 33 into which the flange guide roller 2 enters as described above, and the slide guide means for the roller holding member 51 is not limited to the long hole 34 as described above.
For example, it can be carried out by ants and ant grooves.

As shown in FIG. 5, the section steel guiding device configured as described above is installed on the entrance side and / or the exit side of the universal rolling mill. For example, when the H-section steel is rough-rolled and finish-rolled by a universal rolling mill, the guide device installed in the rough rolling mill and the finish rolling mill firstly has the configuration shown in FIG.
As shown in (a), the flange restraining guide 3 slides to the right (upstream side) to receive the material 10 to be rolled, and the flange guide roller 2, the flange restraining guide 3 and the fillet guide 4 allow the material 10 to be rolled. Flange 1
The rolled material 10 is guided while restraining the two end faces and the fillet portion 13 from above and below. Then, the material to be rolled 10
As the roll advances toward the rolling roll 20, the flange restraining guide 3 is moved to the left by the slide mechanism 6 at a speed substantially equal to the transport speed of the material to be rolled 10, and the outlet end 36 of the flange restraining guide 3 is As shown in FIG. 5 (b), the rolling mill enters the inside of the rolling mill housing 30 and is brought close to the mill center. Therefore, the distance L1 between the mill center and the outlet end 36 of the flange restraining guide 3 can be shortened, so that the web 11 of the material 10 to be rolled is
0 can be guided exactly on the pass line, and
As shown in FIG. 9, since the control effect of the deviation of the center of the web is further improved, the amount of deviation of the center of the web is extremely small.
It is possible to roll an H-section steel with good dimensional accuracy.

The vertical and horizontal distances between the flange guide roller 2 and the flange restraining guide 3 and the vertical and horizontal distances between the fillet guides 4 are determined by the vertically moving mechanism and the left and right moving mechanism of the individually driven block 1. (Not shown), the material to be rolled 10 is set in advance by the lifting mechanism 5 of the flange guide roller 2 so as to be adapted to the web height, flange width and web thickness required in each rolling step. You can be guided exactly on the line. Therefore, even when the flange width is changed, the flange guide roller 2 and the flange restraining guide 3 can be independently moved and adjusted integrally by the lifting / lowering means 5, so that the flange guide roller 2, the flange restraining guide 3, and the fillet guide 4 can be adjusted. Thus, the material to be rolled can be guided while being restrained. Further, even if the gap between the web restraining guide and the web is not severely adjusted as in the related art, since the flange restraining guide 3 is close to the mill center and restrains the flange end face, the bias of the web center is significantly reduced. effective.

FIG. 6 is a distribution diagram of dimensional accuracy showing the effect of the present invention. This is because the dimension size of H-section steel is H400 × 2
For the three types of 00, H600 × 200, and H900 × 300, when the rolling guide device was not used and when the conventional rolling guide device (without the flange restraining guide) was used,
FIG. 6 is a comparison of the deviation of the center of the web when the rolling guide device of the present invention is used. In addition, in the case of the conventional rolling guidance apparatus, L = 1500-1800 mm, and in the case of the rolling guidance apparatus of the present invention, L1 = 500 mm. From FIG. 6, it can be seen that the deviation amount at the center of the web is remarkably reduced in both the average value and the deviation value when the rolling guide device of the present invention is used for any size of the H-section steel. That is, due to the restraining effect of the flange restraining guide 3 according to the present invention in the vicinity of the mill center, the deviation of the web center can be suppressed with little variation and high accuracy.

FIG. 7 shows the tendency of the web center of the H450 × 300 H-section steel to be biased in the web length direction. In addition, L1 = 500 mm as described above. In the figure, Ds indicates the drive side, and Fs indicates the free side.
From this figure, it can be seen that if the rolling guide device of the present invention is used, the variation of the deviation amount S at the center of the web is very small over the entire length of the H-section steel, and the variation of S is large, that is, from the top and bottom. It can be seen that the distance of the image can be kept very short so as not to be inferior.

[0016]

As described above, according to the present invention, apart from the flange guide roller for restraining the flange end surface of the material to be rolled, and vertically moving together with the flange guide roller,
In addition, a flange-restricted guide whose entrance and exit end extends as close as possible to the mill center is slidable in the flow direction of the material to be rolled, so the control effect of the deviation of the center of the web is improved and the deviation of the center of the web is significantly reduced. Has the effect of causing

[Brief description of the drawings]

FIG. 1 is a front view of a guidance device according to the present invention.

FIG. 2 is a sectional side view taken along line AA of FIG.

FIG. 3 is a front view of a lifting / lowering mechanism of a flange guide roller.

FIG. 4 is a sectional side view taken along the line BB of FIG. 3;

FIG. 5 is an explanatory diagram of the operation of the present guiding device.

FIG. 6 is a distribution diagram of a web center deviation amount showing an effect of the present invention.

FIG. 7 is a graph showing the tendency of the amount of web center deviation in the entire length direction to show the effect of the present invention.

FIG. 8 is an explanatory view showing the deviation of the web center of the H-section steel.

FIG. 9 is a graph showing the relationship between the control effect of the bias of the web center and the distance from the mill center to the constraint guide.

FIG. 10 is a graph showing a relationship between a deviation of a web center and a web guide gap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Block 2 Flange guide roller 3 Flange restraint guide 4 Fillet guide 5 Lifting mechanism 6 Slide mechanism 10 Rolled material 20 Rolling roll 30 Rolling mill housing 33 Long hole 35 Restraining surface of flange restraint guide 36 Exit end of flange restraint guide 51 Roller holding Element

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-39919 (JP, A) JP-A-3-5011 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 39/14 B21B 1/08 B21B 39/16

Claims (2)

(57) [Claims] 1. A guide device which is installed on the entrance side and / or the exit side of a universal rolling mill for rolling a section steel having a flange, and guides the passage of the material to be rolled while restraining the flange and the web of the material to be rolled. in the flange guide roller and the flange restraining guides and both provided vertically movably in a block, the sliding direction of flow of the material to be rolled so as to extend the flange restraining guide to mill center close to restrain the flange end face of the material to be rolled An apparatus for guiding a section steel roll, the apparatus being provided so as to be capable of being provided . 2. The method according to claim 1, wherein the flange restraining guide is formed of a member having an L-shaped or groove-shaped cross section, and is provided between an elongated hole into which the flange guide roller enters and a vertically movable roller holding member that holds the flange guide roller. 2. The guiding device according to claim 1, further comprising an interposed slide mechanism.