JP2556304Y2 - Guide device for section steel of edging rolling mill - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an edging rolling mill for rolling down an end face of a flange of an H-section steel or a similar section steel, and a corner formed by a web face and a flange face of the section steel. The present invention relates to a guide device for guiding a shaped steel through a roll gap along a corner.

[0002]

2. Description of the Related Art As a guide device for an edging rolling mill of this type, there is, for example, one described in Japanese Patent Application Laid-Open No. 63-160715. This guide device is used in combination with an edging roll composed of a flat roll or a drum-shaped roll, and has a pair of left and right guide members for upper and lower rolls, respectively. Each guide member has a structure in which the interval can be adjusted by a reverse screw type feed mechanism, and is attached to a support that moves up and down with respect to the chock via an elevating mechanism. For this reason, since each guide member can move in the up-down direction and also moves in the left-right direction in opposition, it is also possible to perform edging rolling of shaped steel having different web inner widths and flange leg lengths.

[0003]

Since the guide device described in the above-mentioned publication has a structure used in combination with a flat roll or an hourglass roll, it cannot be used in a rolling mill having a caliber roll. However, at present, rolling mills equipped with caliber rolls occupy the majority, and therefore, the guide device described in the above-mentioned publication requires a large modification when used in existing rolling equipment. In addition, in addition to the guide member, the entire device including the reverse screw type feed mechanism for moving the guide member to the left and right and its driving device is moved up and down by the elevating means, so that the structure becomes complicated and the elevating means is increased. Becomes large.

The present invention has been made in view of the above points, and can be easily applied to existing rolling mills provided with caliber rolls, and reliably guides a shape steel to a predetermined position to improve dimensional accuracy in edging rolling. It is an object of the present invention to provide a guide device for a shaped steel of an edging rolling mill which can be used.

[0005]

In order to achieve the above object, the guide device of the present invention comprises: a) a passage direction of a shaped steel in a gap between a pair of upper and lower caliber rolls rotatably supported between chocks; B) each of the rolling guides is opposed to a rest bar laid across a chock in front of and behind the caliber roll via lifting means. It is provided so that it can move up and down freely.

[0006]

In the guide device of the present invention having the above structure,
For example, when rolling the flange end face of the H-section steel, in a state where the upper and lower rolling guides are opposed to each other by the elevating means and moved up and down in accordance with the web thickness of the H-section steel,
By introducing the H-beam between the caliber rolls rotating along the rolling guide, the H-beam is centered horizontally by the upper and lower rolling guides and in the vertical center between the caliber rolls, and the flange edge is pressed down. You. As a result, edging rolling of the H-section steel with high accuracy in terms of shape, dimensions, and the like is performed.

Further, the guide device of the present invention can be composed of a pair of upper and lower parts of at least three parts of a rolling guide and front and rear elevating means, that is, a total of six parts. It can be performed only by performing a simple process such as forming a hole into which the lifting means can be inserted. In other words, it can be carried out on existing rolling mills (with caliber rolls) and can be carried out extremely easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a guide device for an edging rolling mill according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a main part of a rolling mill provided with a guide device according to an embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. It is. The rolling mill 1 shown in these figures is used for edging the flange edge of an H-section steel (or a similar shaped steel, the same applies hereinafter) h, and is usually arranged in front of the rolling mill 1. The end face of the flange of the H-section steel in which the web and the flange are pressed down by a universal rolling mill (not shown) is pressed down by a rolling mill 1 to correct the shape and dimensions of the flange in the width direction.

The rolling mill 1 is provided with upper and lower caliber rolls 2 for edging rolling. Each caliber roll 2.2 has a large outer diameter roll 2A for restraining the web of the H-shaped steel h, and an outer diameter disposed outside and adjacent to the roll 2A for rolling down the flange end face of the H-shaped steel h. Rolls 2B having a smaller diameter and
There is a concave between A. Each caliber roll 2 is rotatably supported via a bearing (not shown) between a pair of left and right chocks 3.4 arranged at a predetermined interval. In addition, before and after the caliber roll 2, rest bars 5.6 are fixed so as not to interfere with the caliber roll 2 so as to straddle between the left and right chocks 3 and 4. The central part 5a, 6a of each rest bar 5.6,
As shown in FIG. 3, the protrusion protrudes toward the caliber roll 2 side. Further, a pair of projections 5b, 6b project from the facing surface of each of the rest bars 5, 6 at a certain interval near the center thereof.

The central portions 5a, 6a of the rest bars 5, 6
, Holes 5c, 6c having a rectangular opening cross section are formed in the vertical direction, and a hydraulic cylinder 7 as an elevating means of the rolling guide 10 is provided.
8 is loaded into each of the holes 5c and 6c. The distal ends of the piston rods 7a and 8a protrude outward from the openings of the holes 5c and 6c.

The rolling guide 10 comprises a guide plate 11 and a block portion 12, and as shown in FIG.
Extends in the gap between the recesses of the upper and lower caliber rolls 2 along the passing direction of the H-shaped steel h, and both ends of the opposing surface (surface) extend outward as shown in FIG. It is inclined as follows. Further, the block portions 12 are integrally fixed to both end portions of the back surface of the guide plate 11. A concave portion 12a is formed in the block portion 12, and tips of the piston rods 7a and 8a penetrating into the concave portion 12a are connected to nuts 7b and 8 respectively.
By fixing with b, it is attached to the hydraulic cylinders 7 and 8. Further, on both sides of the block portion 12, concave guide grooves 12b are formed in the vertical direction as shown in FIG. 1 and FIG. Have been combined. For this reason, the rolling guide 10 is moved by the expansion and contraction of the piston rods 7a and 8a of the hydraulic cylinders 7 and 8 so that the protrusions 5
It moves up and down along b.6b.

In the above embodiment, the upper and lower rolling guides 10 are moved up and down by a pair of front and rear hydraulic cylinders 7 and 8, respectively. In order to perform edging rolling in a state of being aligned with the vertical center position of 2.2, first, the guide plate 11 of the rolling guide 10 is horizontally moved during the vertical movement by the front and rear hydraulic cylinders 7 and 8. Therefore, the amount of expansion and contraction of the piston rods 7a and 8a must be balanced. Second, the upper and lower hydraulic cylinders 7
8 so that the guide plate 11 of the upper and lower rolling guides 10 is always equidistant from the vertical center position of the upper and lower caliber rolls 2 at the time of the vertical movement by the upper and lower rolling guides 8.
a. The amount of expansion and contraction of 8a must be balanced. For this reason, in the present embodiment, a total of four hydraulic cylinders 7, 8 in the front, rear, upper and lower directions are cylinders with position sensors, and all are electrically synchronized. Control means (circuit) using, for example, a proportional control valve as shown in FIG.
May be connected for each hydraulic cylinder 7 (8). Since this control means is publicly known, its description is omitted.

In the rolling mill 1 having the section steel guide device of the present embodiment configured as described above, the edging of the H-section steel h mainly having different web thicknesses but equal flange leg lengths and flange width lengths. At the time of rolling, high-precision rolling in size and shape is performed simply by moving the upper and lower rolling guides 10 and 10 up and down by hydraulic cylinders 7 and 8 according to the web thickness of the H-section steel h and positioning them at predetermined positions. That is, the H-shaped steel h drawn between the rolls by the rotation of the caliber rolls 2, 2 is guided on both upper and lower surfaces of the web along the upper and lower rolling guides 10, 10, and the flange end face of the H-shaped steel h has a small diameter. Edging pressure reduction is performed by the roll 2B. At this time, the large-diameter roll 2A restrains a substantially right-angled corner formed by the flange of the H-section steel h and the web. However, when the H-section steel is restrained only by the large-diameter roll 2A of the upper and lower caliber rolls 2, the posture of the H-section steel h is inclined with respect to the horizontal plane, or the center position of the H-section steel h in the thickness direction is vertically Is shifted from the vertical center position between the caliber rolls 2 in the rolling mill 1.
0.10 surely regulates the posture of the H-section steel h to an appropriate state.

In the above embodiment, the upper and lower rolling guides 1 are used.
The hydraulic cylinders 7 and 8 for raising and lowering the hydraulic cylinders 0 and 10 are provided one at each of the front and rear. However, two hydraulic cylinders may be provided at the front and rear, and the guide grooves 12b of the block portion 12 and the projections for guiding the same are provided. The parts 5b and 6b can be omitted.

[0016]

[Effect of the invention] As is clear from the above explanation,
The shaped steel guide device of the present invention has the following effects.

(1) Since it is a guide device applicable to a rolling mill equipped with a caliber roll, it can be used for existing rolling equipment having a large number of caliber rolls. Accuracy can be improved.

(2) Since the rolling guide is raised and lowered by incorporating the lifting means into the rest bar, the structure is simple and the number of components is reduced, and therefore, the replacement of the guide device accompanying the change in the dimensions of the caliber roll can be performed in a short time. Easy to do. In addition, since the present invention can be applied without changing the structure of the existing equipment, the existing equipment is not wasted and is economical.

(3) The operation of raising and lowering the rolling guides by the plurality of lifting and lowering means can be performed by a simple operation by synchronizing as in the embodiment, so that the position adjustment of the rolling guides with respect to the section steels having different web thicknesses can be easily performed. In addition, the edging rolling can be performed accurately and the efficiency of edging rolling can be increased.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a rolling mill provided with a guide device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the rolling mill of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a hydraulic circuit diagram showing an example of a control circuit of a hydraulic cylinder using a proportional control valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling machine 2 Caliber roll 3.4 Chock 5.6 Rest bar 7.8 Hydraulic cylinder (elevating means) 10 Rolling guide 11 Guide plate 12 Block part h H-shaped steel

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kiyotaka Morioka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Misao Makinohara 1-1-2, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Toru Morimi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hironori Asari 3-1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries, Ltd.Kobe Plant (72) Inventor Masatoshi Fukuda 3-1-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd.Kobe Plant (72) Ryoichi Yamase 3-1-1, Kawasaki Heavy Industries, Ltd. Kobe Plant

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of upper and lower rolling guides extending along the direction of passage of a shaped steel in a gap between a pair of upper and lower caliber rolls rotatably supported between chocks, respectively. And a rest bar provided across the chocks in front of and behind the caliber roll so as to be able to move up and down opposingly via lifting means.