JPH0615808U - Guide device for shaped steel of edging rolling mill - Google Patents

Abstract

(57) [Abstract] [Purpose] An edging rolling mill that can be easily applied to existing rolling mills equipped with caliber rolls and can reliably guide shaped steel to a predetermined position to improve dimensional accuracy in edging rolling. Provided is a shape steel guide device. [Structure] In the gap between a pair of upper and lower caliber rolls 2.2 rotatably supported between the chocks 3 and 4, H
It is provided with a pair of upper and lower rolling guides 10 extending along the passing direction of the shaped steel h. Each rolling guide 10 ・ 10
Are provided so as to be movable up and down in opposition to the rest bars 5 and 6 which are disposed across the chucks 3 and 4 before and after the caliber roll 2 via hydraulic cylinders 7 and 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to an edging rolling machine for reducing the end surface of a flange of H-section steel and similar section steel, and the section steel is formed along the corner formed by the web surface of the section steel and the flange surface. The present invention relates to a guide device for guiding the sheet through the roll gap.

[0002]

[Prior art]

 As a guide device for this kind of edging rolling mill, for example, there is one described in JP-A-63-160715. This guide device is used in combination with an edging roll consisting of a flat roll or a drum-shaped roll, and has a pair of left and right guide members for the upper and lower rolls. 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 a lifting mechanism. For this reason, each guide member can be moved in the vertical direction as well as in the left-right direction, so that edging rolling of shaped steels having different web inner widths and flange leg lengths is possible.

[0003]

[Problems to be solved by the device]

 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 equipped with a caliber roll. However, at present, most rolling mills are equipped with caliber rolls, so the guide device described in the above-mentioned publication requires major modification when used in existing rolling equipment. In addition, the guide device raises and lowers the entire device, including the guide member, the reverse screw type feed mechanism for moving the guide member left and right, and the drive device thereof, so that the structure becomes complicated and The lifting means becomes large.

The present invention has been made in view of the above points, and can be easily applied to an existing rolling machine equipped with a caliber roll, and reliably guides a shaped steel into a predetermined position to obtain 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 improve the performance.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the guide device of the present invention comprises: a) a pair of upper and lower caliber rolls that are rotatably supported between chocks, and a pair of upper and lower caliber rolls extending along the passing direction of the shaped steel. B) Each of the rolling guides is provided so as to be able to move up and down in opposition to each other via a raising and lowering step with respect to a rest bar that is arranged across the chocks before and after the caliber roll. There is.

[0006]

[Action]

 In the guide device of the present invention having the above-described structure, for example, when rolling the flange end face of H-section steel, the upper and lower rolling guides are positioned by facing each other up and down by the elevating means according to the web thickness of the H-section steel. In this state, by introducing the H-section steel between the caliber rolls that rotate along the rolling guide, the H-section steel is centered horizontally and vertically between the caliber rolls by the upper and lower rolling guides, and the flange end The edges are pressed. As a result, edging rolling of H-section steel is performed with high precision in terms of shape and dimensions.

Further, the guide device of the present invention can be constructed by a pair of at least three parts of the rolling guide and the front and rear elevating means, that is, a total of 6 parts. This can be done by simply performing a process such as forming a hole into which the elevating means can be inserted. In other words, it can be applied to existing rolling mills (with caliber rolls) and is extremely easy.

[0008]

【Example】

 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 the line AA of FIG. 1, and FIG. 3 is a sectional view taken along the line BB of FIG. Is. The rolling mill 1 shown in these figures is for edging rolling the flange edge of an H-section steel (or similar shaped steel, the same applies below) h, and is usually arranged in front of this rolling mill 1. The end face of the flange of the H-shaped steel, the web and the flange of which are pressed by a universal rolling machine (not shown), is pressed by the rolling machine 1 to correct the shape and dimensions in the width direction of the flange.

The rolling mill 1 includes caliber rolls 2 for edging rolling, which are vertically opposed to each other. Each caliber roll 2.2 is a roll 2A having a large outer diameter that constrains the web of the H-section steel h, and an outer diameter that is arranged outside the roll 2A adjacent to the roll 2A and presses the flange end surface of the H-section steel h. The rolls 2B having a small size are provided on the left and right, and the space between the rolls 2A is recessed. Each caliber roll 2.2 is rotatably supported via a bearing (not shown) between a pair of left and right chocks 3 and 4 arranged at a predetermined interval. Further, front and rear of the caliber roll 2, straddle rests 5 and 6 straddling the left and right chocks 3 and 4 are fixed so as not to interfere with the caliber roll 2. The center portions 5a and 6a of the respective rest bars 5 and 6 project in a convex shape toward the caliber roll 2 side as shown in FIG. In addition, a pair of protrusions 5b and 6b are provided on the opposite surface of each of the rest bars 5 and 6 so as to be spaced from the center of the rest bar at regular intervals.

Holes 5c and 6c having an opening cross-section rectangular shape are vertically formed in the central portions 5a and 6a of the rest bars 5 and 6, and hydraulic cylinders 7 and 8 as lifting means of the rolling guide 10 are provided in the holes 5c. -It is loaded in 6c. The tip ends of the piston rods 7a and 8a are projected outward from the openings of the holes 5c and 6c.

The rolling guide 10 is composed of a guide plate 11 and a block portion 12. As shown in FIG. 1, the upper and lower guide plates 11 form an H-shaped steel h in the space between the recesses of the upper and lower caliber rolls 2. 2, and both ends of the facing surface (surface) are inclined so as to expand outward as shown in FIG. Block parts 12 are integrally fixed to both ends of the back surface of the guide plate 11. A recess 12a is formed in the block 12, and the tip of the piston rod 7a, 8a penetrating into the recess 12a is fixed with a nut 7b, 8b so that it can be attached to the hydraulic cylinder 7.8. There is. Further, as shown in FIGS. 1 and 3, concave guide grooves 12b are vertically formed on both sides of the block 12, and the guide grooves 12b can be slid vertically on the protrusions 5b and 6b. It is fitted. Therefore, the rolling guide 10 moves up and down along the protrusions 5b and 6b of the rest bars 5 and 6 by the expansion and contraction operation of the piston rods 7a and 8a of the hydraulic cylinders 7 and 8.

By the way, in the above embodiment, the upper and lower rolling guides 10 are moved up and down by the pair of front and rear hydraulic cylinders 7, 8, but the H-section steel h is placed at the center position in the thickness direction of the web by the upper and lower calibers. In order to perform the edging rolling in a state where it is aligned with the vertical center position of the rolls 2 and 1, firstly, the guide plate 11 of the rolling guide 10 is moved during the lifting operation by the front and rear hydraulic cylinders 7 and 8. The expansion and contraction amounts of the piston rods 7a and 8a must be balanced so that they are horizontal. Secondly, the guide plates 11 of the upper and lower rolling guides 10 are always equidistant from the vertical center position of the upper and lower caliber rolls 2 and 2 during the vertical movements by the upper and lower hydraulic cylinders 7 and 8. In addition, the expansion and contraction amounts of the piston rods 7a and 8a must be balanced. For this reason, in this embodiment, a total of four hydraulic cylinders 7 and 8 in the front, rear, upper, and lower directions are used as cylinders with position sensors, and all are electrically synchronized. As a synchronizing means, for example, a controlling means (circuit) using a proportional control valve as shown in FIG. 4 may be connected to each hydraulic cylinder 7 (8). Since this control means is publicly known, its explanation is omitted.

In the rolling mill 1 provided with the shaped steel guide device of the present embodiment configured as described above, the edging of the H-shaped steel h mainly having different web thicknesses but having the same flange leg length and flange width length is performed. At the time of rolling, the upper and lower rolling guides 10 and 10 are moved up and down by hydraulic cylinders 7 and 8 in accordance with the web thickness of the H-shaped steel h to be positioned at a predetermined position, so that rolling with high precision in size and shape can be performed. Be seen. That is, the H-section steel h drawn between the rolls by the rotation of the caliber rolls 2.2 has its upper and lower surfaces guided by the upper and lower rolling guides 10 and 10, and the flange end surface of the H-section steel h. It is formed by edging with a small-diameter roll 2B. At this time, the large-diameter roll 2A restrains the corner portions of the H-section steel h formed by the flange and the web at substantially right angles. However, when the H-section steel is restrained only by the large-diameter rolls 2A of the upper and lower caliber rolls 2.2, 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 of the web is changed. Although it deviates from the vertical center position between the upper and lower caliber rolls 2 and 2, in the rolling mill 1, the rolling guides 10 and 10 reliably regulate the posture of the H-section steel h to an appropriate state.

In the above embodiment, the hydraulic cylinders 7 and 8 for raising and lowering the upper and lower rolling guides 10 and 10 are provided at the front and rear sides, respectively. The guide groove 12b of the portion 12 and the protrusions 5b and 6b for guiding the guide groove 12b can be omitted.

[0016]

[Effect of device]

 As is clear from the above description, the shaped steel guide device of the present invention has the following effects.

(1) Since it is a guide device that can be applied to rolling mills equipped with caliber rolls, it can be used in existing rolling equipment that has a large number of caliber rolls. And the accuracy of the shape can be improved.

(2) Since the rolling guide is moved up and down by incorporating the elevating means in the rest bar, the structure is simple and the number of constituent parts is small. Therefore, the guide device can be replaced in a short time when the size of the caliber roll is changed. Easy to do. In addition, it can be applied without changing the structure of the existing equipment, so that the existing equipment is not wasted and it is economical.

(3) Since the vertical movements of the rolling guides by a plurality of lifting means are synchronized with each other as in the embodiment, it is possible to perform a simple operation. Therefore, it is easy to adjust the position of the rolling guides to the shaped steels having different web thicknesses. The edging rolling can be performed efficiently and accurately.

[Brief description of 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 of the rolling mill of FIG. 1 taken along the line AA.

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

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]

 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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zun Furukawa, 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor, Kiyotaka Morioka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Creator Makinohara Misao 1-2, Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Toru Morinori 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Inventor Hironori Asari 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Inside Kawasaki Heavy Industries, Ltd. (72) Creator Masatoshi Fukuda 3 Higashi-kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo 1st-1 Kawasaki Heavy Industries, Ltd. Kobe factory (72) Creator Ryoichi Yamase 3-1-1 1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. The company Kobe factory

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower rolling guides extending along the passage direction of the shaped steel are provided in a gap between a pair of upper and lower caliber rolls rotatably supported between the chocks, and each rolling guide is provided. A guide device for a shaped steel of an edging rolling mill, which is provided so as to be capable of moving up and down opposite to each other via a lifting means with respect to a rest bar which is arranged across the chocks before and after the caliber roll.