JP2006272343A - Method and device for bending claw of hat-type steel sheet piling joint - Google Patents

Method and device for bending claw of hat-type steel sheet piling joint Download PDF

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JP2006272343A
JP2006272343A JP2005090546A JP2005090546A JP2006272343A JP 2006272343 A JP2006272343 A JP 2006272343A JP 2005090546 A JP2005090546 A JP 2005090546A JP 2005090546 A JP2005090546 A JP 2005090546A JP 2006272343 A JP2006272343 A JP 2006272343A
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joint
roll
claw
hat
arm
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Yoshinori Miura
啓徳 三浦
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for forming a joint of a hat-type steel sheet pile having right and left joint parts of different shapes without any hole die for claw bending. <P>SOLUTION: A first step of bending a claw inwardly and a second step of forming the claw in a final shape are successively performed. A first roller group comprises horizontal rolls 3, 34, 35 arranged to restrict the deformation of a center web 8A, vertical rolls which are arranged facing each other above and below an end of an arm part including a part of a joint part, and arranged to maintain the horizontal posture of the arm part with respect to the horizontal rolls to maintain the vertical posture, and a vertical roll which is arranged facing the previous vertical roll to bend claws 7A, 7B of the joint part inwardly. A second roller group comprises a horizontal roll to restrict the deformation of the center web, horizontal rolls which are arranged facing each other above and below an end of an arm part including the joint part, maintains the vertical posture, and realizes the joint part of a desired shape, and a vertical roll arranged to maintain the horizontal posture of the arm part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、左右で形状が異なる継手部を有するハット型鋼矢板の継手部を仕上げ圧延機出側に配置したローラ群により熱間で成形する方法および装置に関する。   The present invention relates to a method and an apparatus for hot forming a joint portion of a hat-type steel sheet pile having joint portions having different shapes on the left and right sides by a roller group disposed on the exit side of the finish rolling mill.

鋼矢板は河川護岸やビル建設などの土木工事に大量に使用される部材で、用途に応じて種々の断面形状のものが開発されている。左右の継手部の形状が異なる鋼矢板は、壁体を形成する際に隣り合う鋼矢板を逆転させることなく打設することができるので施工時に必要とされる空間を小さくし、非回転打設による自動打設化を可能とするもので主に中低層ビルの建設に用いられている。   Steel sheet piles are members that are used in large quantities for civil works such as river revetments and building construction, and various cross-sectional shapes have been developed depending on the application. Steel sheet piles with different shapes on the left and right joints can be placed without reversing adjacent steel sheet piles when forming a wall, so the space required during construction is reduced and non-rotating placement It is used mainly for the construction of low-rise buildings.

鋼矢板の製造において、継手部の形状が左右で同じ場合、Ｕ形、直線形などの主要部を圧延後、左右の継手部の形状が刻設された左右対称なロール孔型を用いて１〜２パスで仕上げる方法が一般的であるが、左右で異なる形状の場合、上下１組のロール孔型を用いて１〜２パスで仕上げる方法の他に幾つかの成形方法が提案されている。   In the manufacture of steel sheet piles, when the shape of the joint part is the same on the left and right, after rolling the main part such as U-shape and linear shape, the left and right symmetrical roll hole molds in which the shape of the joint part is engraved are used. A method of finishing in two passes is common, but in the case of different shapes on the left and right, several forming methods have been proposed in addition to a method of finishing in one or two passes using a pair of upper and lower roll hole molds. .

図５はハット型鋼矢板に左右で異なる形状の継手部を水平ロール孔型で成形する方法を模式的に示す図で、ハット型鋼矢板３９０は成形ウエブ８０Ａと両側のフランジ４０からなるＵ字型とその左右に、先端部に継手部５０Ａ，５０Ｂを有する腕部６０を配し、継手部５０Ａ，５０Ｂは水平ロール孔型で１〜２パスで成形する。   FIG. 5 is a diagram schematically showing a method of forming joint portions having different shapes on the right and left sides of a hat-type steel sheet pile with a horizontal roll hole mold. The arm part 60 which has the joint parts 50A and 50B in the front-end | tip part is distribute | arranged to the right and left, and the joint parts 50A and 50B are shape | molded by 1 to 2 passes with a horizontal roll hole type | mold.

水平ロール孔型による成形方法の場合、ハット型鋼矢板３９０は、水平ロール孔型による拘束が十分でない状態で、一方の継手部５０Ａで爪７０Ａが、水平ロール孔型の上ロール３７０の傾斜部５１０Ａと最初に接触し、同時に他方の継手部５０Ｂで爪７０Ｂが水平ロール孔型の下ロール３８０の傾斜部５１０Ｂと最初に接触するので、水平ロール孔型による圧下力（図中矢印で示す）がハット型鋼矢板３９０に偶力として作用し、噛み込み不良や捩れが発生することが指摘されている。   In the case of the forming method using the horizontal roll hole mold, the hat-type steel sheet pile 390 is in a state where the restraint by the horizontal roll hole mold is not sufficient, and the claw 70A is at one joint 50A and the inclined portion 510A of the upper roll 370 of the horizontal roll hole mold. At the same time, and at the same time, the claw 70B first comes into contact with the inclined portion 510B of the lower roll 380 of the horizontal roll hole type at the other joint portion 50B. It has been pointed out that it acts as a couple on the hat-type steel sheet pile 390, resulting in poor biting and twisting.

図６は継手部５５が水平ロール孔型の圧下により変形する様子を示し、圧下開始時点でのロール側壁５１は、圧下量５６の圧下により新たにロール側壁５２を形成するので、爪部には内側に曲げる力５０が働き、圧下開始時点で外側に開いた爪部５３は、圧下終了後、内側に曲げられ爪部５４を形成する。   FIG. 6 shows a state in which the joint portion 55 is deformed by the horizontal roll hole type reduction, and the roll side wall 51 at the time of the start of reduction forms a new roll side wall 52 by the reduction of the reduction amount 56. A claw part 53 that opens outwardly at the time of the start of reduction is bent to the inside after the reduction is completed, and a claw part 54 is formed.

上述した問題点を解決するため、特許文献１は、上下１組の水平ロール孔型により左右で形状が異なる継手部を成形する際、鋼矢板と水平ロール孔型の圧延開始点が左右対称となるように、左右の継手部の爪に先立って左右のフランジ部の下部を水平ロール孔型に接触させることを提案している。   In order to solve the above-described problems, Patent Document 1 discloses that when forming joint portions having different shapes on the left and right sides by a pair of upper and lower horizontal roll hole molds, the rolling start points of the steel sheet pile and the horizontal roll hole mold are symmetrical. Thus, it has been proposed that the lower portions of the left and right flange portions are brought into contact with the horizontal roll hole mold prior to the claws of the left and right joint portions.

また、特許文献２は、左右で形状が異なる継手部を成形する際、左右の形状が片側ずつそれぞれに刻設された２組の孔型ロールを用いて、順次、左右の継手を成形することにより、両端部の継手部の成形を１本の水平ロール孔型により同時に行った場合に発生する圧下力による偶力を抑制することを提案している。   In Patent Document 2, when forming joint portions having different shapes on the left and right sides, the left and right joints are sequentially formed using two sets of perforated rolls in which the left and right shapes are engraved on each side. Therefore, it has been proposed to suppress the couple caused by the rolling force generated when the joint portions at both ends are simultaneously formed by one horizontal roll hole mold.

更に、特許文献３は、上下１組の水平ロール孔型を有する仕上げ圧延機による継手部の屈曲成形において、仕上げ圧延の開始時点における被圧延材の全幅を仕上げ孔型幅以下、且つ継手部先端外側面の傾斜角度を仕上げ孔型の継手曲げ傾斜部の傾斜角度より大きくし、仕上げ孔型に継手部を継手先端基部から外側面へと順次接触させ、本来の曲げ方向と反対方向に圧下力が作用することを防止して安定した曲げ成形を行うことを提案している。   Furthermore, in Patent Document 3, in the bending forming of a joint portion by a finish rolling mill having a pair of upper and lower horizontal roll holes, the entire width of the material to be rolled at the start of finish rolling is equal to or less than the width of the finished hole and the tip of the joint The inclination angle of the outer surface is made larger than the inclination angle of the joint bend inclined part of the finished hole type, and the joint part is sequentially brought into contact with the finished hole type from the base end of the joint to the outer surface, and the rolling force is reduced in the direction opposite to the original bending direction. It has been proposed to perform stable bending molding by preventing the action of.


特開平８−１１７８０１号公報JP-A-8-117801 特開平１０−７１４０１号公報Japanese Patent Laid-Open No. 10-71401 特開２００１−１０５００２号公報JP 2001-105002 A

しかしながら、水平ロール孔型と被圧延材の寸法関係を調整して、継手部の曲げ成形を開始する時点において被圧延材を拘束状態とする方法や左右の継手部に懸る圧下力を偶力でなく本来の爪曲げ方向に作用させる方法は、水平ロール孔型に刻設する継手部の形状や、フランジ幅角度を高精度に維持する必要があり操業上の負担が大きく、被圧延材で継手部以外の個所が大きく形状変化することが必要で割れなどの発生も懸念される。   However, the dimensional relationship between the horizontal roll hole mold and the material to be rolled is adjusted, and the method of placing the material to be restrained at the time of starting the bending of the joint part and the rolling force applied to the left and right joint parts by couple However, it is necessary to maintain the shape of the joint part to be engraved in the horizontal roll hole mold and the flange width angle with high accuracy, and the operation burden is large. It is necessary for the parts other than the part to change shape greatly, and there is a concern about the occurrence of cracks.

また、左右の継手部を、その形状を片側ずつ刻設した２組の水平ロール孔型により順次成形する方法でも、被圧延材に対して圧下力は非対称に発生し、ねじれを十分防止することはできない。   In addition, even when the left and right joints are sequentially formed by two sets of horizontal roll punches whose shapes are engraved on each side, the rolling force is generated asymmetrically with respect to the material to be rolled, and the torsion is sufficiently prevented. I can't.

そこで本発明は、構造上爪曲げ用の孔型を必要とせず、水平方向の力の効率が高くねじれが生じにくい、水平ローラと竪ローラによるローラ群を複数用いて左右異なる形状の継手部を成形する方法および装置を提供することを目的とする。   In view of this, the present invention does not require a hole mold for bending the nails because of its structure, and it has a horizontal force efficiency and is not easily twisted. It is an object of the present invention to provide a molding method and apparatus.

本発明は、以下の手段により課題を達成する。
１ 仕上げ圧延後に、熱間で継手部の爪曲げを行い所望の形状とする、腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法であって、爪を内側に曲げる第一の工程と、爪を最終形状に成形する第二の工程を有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法。 The present invention achieves the object by the following means.
1 It is a nail bending method of a hat-type steel sheet pile having joint portions of different shapes on the left and right ends of an arm portion, which are subjected to claw bending of the joint portion hot to make a desired shape after finish rolling. A claw bending method for a hat-type steel sheet pile having a first step and a second step of forming a claw into a final shape, having joint portions having different shapes on both right and left ends of the arm portion.

２ 前記第一の工程と前記第二の工程を、仕上げ圧延後の姿勢を維持しながら行うことを特徴とする１記載の腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法。   2. The claw of a hat-type steel sheet pile having joint portions having different shapes on the left and right ends of the arm portion according to claim 1, wherein the first step and the second step are performed while maintaining a posture after finish rolling. Bending method.

３ 仕上げ圧延機の出側近傍に配置して、熱間で継手部の爪曲げを行う、腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置であって、
前記爪曲げ装置が、前記腕部両端部において、爪を内側に曲げる第一のローラ群と、前記第一のローラ群の下流側に配置され、継手部を所望の形状に成形する第二のローラ群とを有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。 3 A claw bending device for a hat-type steel sheet pile having a joint portion of a different shape on both the left and right ends of an arm portion, which is arranged in the vicinity of the exit side of the finishing mill and performs hot claw bending of the joint portion.
The claw bending device is disposed at the both ends of the arm part at a downstream side of the first roller group for bending the claw inward, and a second part for forming the joint part into a desired shape. A hat-type steel sheet pile claw bending device having joint portions of different shapes on both right and left ends of an arm portion, characterized by comprising a group of rollers.

４ 前記第一のローラ群と前記第二のローラ群はいずれも無駆動のローラからなり、前記第一のローラ群は、ハット型鋼矢板の中央ウエブの上面側で前記中央ウエブの変形を拘束するように配置される水平ロールと、継手部の一部を含む腕部端部の上下で対向するように配置され、上下方向の姿勢を維持する水平ロールと腕部の水平方向の姿勢を維持するように配置される竪ロールと、前記竪ロールに対向して配置され継手部の爪を内側に曲げる竪ロールを有し、前記第二のローラ群は、ハット型鋼矢板の中央ウエブの上面側に配置され前記中央ウエブの変形を拘束する水平ロールと、継手部を含む腕部端部の上下に対向して配置され、上下方向の姿勢維持と継手部を所望の形状とする水平ロールと、腕部の水平方向の姿勢を維持するように配置される竪ロールを有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。   4 Both the first roller group and the second roller group are non-driven rollers, and the first roller group restrains deformation of the central web on the upper surface side of the central web of the hat-type steel sheet pile. The horizontal roll is arranged so as to be opposed to the upper and lower sides of the arm part end including a part of the joint part, and the horizontal roll for maintaining the vertical attitude and the horizontal attitude of the arm part are maintained. And the second roller group is arranged on the upper surface side of the central web of the hat-type steel sheet pile. A horizontal roll that is arranged and restrains deformation of the central web, a horizontal roll that is arranged facing the top and bottom of the end of the arm including the joint, and has a desired shape in the vertical direction, and the arm To maintain the horizontal orientation of the head Nail bending apparatus of hat-type metal sheet pile having a joint portion of a different shape to the left and right ends of the arms, characterized in that it has a vertical rolls being location.

５ 前記第一のローラ群と前記第二のローラ群は、熱間矯正機能が得られるように間隔を設けて配置され、前記第一のローラ群は仕上げ圧延機の圧延ロール中心から１０００ｍｍ以内、前記第二のローラ群は仕上げ圧延機の圧延ロール中心から１５００ｍｍ以内に配置されていることを特徴とする３または４記載の腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。   5 The first roller group and the second roller group are arranged at intervals so as to obtain a hot straightening function, the first roller group is within 1000 mm from the center of the rolling roll of the finish rolling mill, The claw of a hat-type steel sheet pile having joint portions having different shapes on both left and right ends of the arm portion according to 3 or 4, wherein the second roller group is disposed within 1500 mm from the center of the rolling roll of the finish rolling mill Bending device.

本発明によれば仕上げ圧延機出側の下流側に、被圧延材の姿勢を維持するローラと爪曲げを行うローラを有するローラ群を間隔を設けて複数配置するので、継手部の形状精度とねじれの熱間矯正に優れた左右で異なる形状を有する継手部の成形が可能となる。   According to the present invention, a plurality of roller groups having a roller for maintaining the posture of the material to be rolled and a roller for performing claw bending are arranged on the downstream side of the exit side of the finish rolling mill, so that the shape accuracy of the joint portion is increased. It is possible to mold joint portions having different shapes on the left and right, which are excellent in hot correction of torsion.

また、仕上げ圧延機出口近傍の、被圧延材が比較的高温な状態で継手部の成形が行われるので、割れなどの発生防止に優れる。また、１パスで継手部の爪曲げから最終形状の成形までを行うので生産能率が向上する。   Further, since the joint portion is formed in the vicinity of the finish rolling mill exit while the material to be rolled is at a relatively high temperature, it is excellent in preventing the occurrence of cracks and the like. In addition, the production efficiency is improved because the process from the claw bending to the final shape is performed in one pass.

本発明は左右で異なる形状の継手部を有するハット型鋼矢板の継手部を、仕上げ圧延機出側で、左右の継手部となる位置のそれぞれに、下流方向に複数に配置したローラ群により成形する。本発明で左右で異なる形状の継手部とはその形状が左右で点対称となる継手部を意味する。   In the present invention, a joint portion of a hat-type steel sheet pile having joint portions having different shapes on the left and right sides is formed by a group of rollers arranged in the downstream direction at each of the positions to be the left and right joint portions on the exit side of the finish rolling mill. . In the present invention, the joint portions having different shapes on the right and left sides mean joint portions whose shapes are point-symmetric on the left and right.

複数に配置したローラ群は、最初のローラ群によりまず爪を内側に曲げた後（第一の工程）、第二のローラ群により最終形状となるまでの成形（第二の工程）を行い、上記第一の工程と第二の工程の、左右の継手部での開始、終了時間は同時とする。尚、本発明で仕上げ圧延機とはハット型鋼矢板のウエブおよびフランジの仕上げ圧延機を指す。   A plurality of roller groups are formed by first bending the claws inward by the first roller group (first step), and then forming (second step) until the final shape is obtained by the second roller group, The start and end times of the left and right joints in the first step and the second step are the same. In the present invention, the finishing mill refers to a hat-type steel sheet pile web and flange finishing mill.

図１は本発明の実施に用いる爪曲げ装置の一例を示す正面図で、（ａ）は仕上げ圧延機の出側に最初に配置され、左右の継手部において爪を外側から内側に曲げる第一の工程を実施する、複数のローラを有する第一のローラ群、（ｂ）は第二のローラ群の下流側に配置され、左右の継手部を最終形状に成形する第二の工程を実施する複数のローラを有する第二のローラ群を示す。   FIG. 1 is a front view showing an example of a claw bending apparatus used in the practice of the present invention. FIG. 1A is a diagram showing a first arrangement in which a claw is first bent from the outside to the inside at a joint portion on the left and right sides. The first roller group having a plurality of rollers, (b) is arranged on the downstream side of the second roller group, and the second step of forming the left and right joint portions into a final shape is performed. 2 shows a second roller group having a plurality of rollers.

図１（ａ）において１は継手部５Ａ（５Ｂ）の爪７A（７B）を外側から曲げる竪ロール、２は竪ロール１に対向して配置される、被圧延材（ハット型鋼矢板）３９の腕部６のフランジ４側端部の下面を拘束する竪ロール、３は継手部５Ａ（５Ｂ）の一部と腕部６を上下面から拘束する水平ロールで、上面側に配置される場合は、ロール軸が架台１１に弾性体１３を介して取り付けられ、腕部６の上下方向の厚みに追従する水平ロール、４は被圧延材３９のフランジ、８は被圧延材３９のウエブ８Ａの上面を拘束する上押さえロール、９はウエブガイド、１０は継手部成形装置本体、１２は爪７A（７B）を所望の形状に外側から内側に向けて曲げる際、曲げ量を調整すべく竪ロール１の中心軸を移動させる移動機構を示す。   In FIG. 1 (a), reference numeral 1 denotes a saddle roll that bends the claw 7A (7B) of the joint portion 5A (5B) from the outside. A scissors roll that restrains the lower surface of the flange 4 side end of the arm 6, 3 is a horizontal roll that restrains a part of the joint portion 5 </ b> A (5 </ b> B) and the arm 6 from the upper and lower surfaces. The horizontal roll is attached to the gantry 11 via the elastic body 13 and follows the thickness of the arm 6 in the vertical direction, 4 is the flange of the material to be rolled 39, 8 is the upper surface of the web 8A of the material to be rolled 39 9 is a web guide, 10 is a joint portion forming apparatus main body, and 12 is a heel roll 1 for adjusting a bending amount when the claw 7A (7B) is bent from the outside to the inside in a desired shape. The movement mechanism which moves the center axis | shaft of is shown.

図１（ｂ）において、３４は継手部５Ａ（５Ｂ）と腕部６を上面（下面）から拘束する水平ロール、３５は水平ロール３４に対向して配置され、継手部５Ａ（５B）と腕部６の下面（上面）を拘束する水平ロールを示し、水平ロール３４、３５が継手部５Ａ（５Ｂ）と腕部６の上面に配置される場合は、ロール軸が架台１１に弾性体１３を介して取り付けられる。   In FIG. 1B, 34 is a horizontal roll that restrains the joint portion 5A (5B) and the arm portion 6 from the upper surface (lower surface), and 35 is disposed to face the horizontal roll 34, and the joint portion 5A (5B) and the arm are arranged. The horizontal roll which restrains the lower surface (upper surface) of the part 6 is shown, and when the horizontal rolls 34 and 35 are arranged on the upper surface of the joint part 5A (5B) and the arm part 6, the roll shaft attaches the elastic body 13 to the mount 11. Attached through.

継手部成形装置本体１０は継手部成形機能と姿勢維持機能を有し、第一のローラ群では爪曲げ加工中に、第二のローラ群においては継手部を成形中に、被圧延材３９の姿勢を維持するため、ウエブ８Ａ、フランジ４から腕部６にかけての屈曲部および継手部５Ａ（５Ｂ）を水平ロールや竪ロールにより拘束する。   The joint part forming apparatus main body 10 has a joint part forming function and a posture maintaining function. During the claw bending process in the first roller group, the joint part is formed in the second roller group while the joint part is being formed. In order to maintain the posture, the web 8A, the bent portion from the flange 4 to the arm portion 6 and the joint portion 5A (5B) are restrained by a horizontal roll or a heel roll.

本発明において第一のローラ群とは、被圧延材３９の姿勢維持と左右の爪曲げに必要な２個の竪ロール１、竪ロール２、４個の水平ロール３および１個の上押さえロール８を備えたローラ群を指し、第二のローラ群とは、被圧延材３９の姿勢維持と左右の継手部の成形に必要な２個の竪ロール２、２個の水平ロール３４、水平ロール３５および１個の上押さえロール８を備えたローラ群を指す。   In the present invention, the first roller group means two heel rolls 1, heel rolls 2, four horizontal rolls 3, and one upper presser roll necessary for maintaining the posture of the material to be rolled 39 and bending the left and right claws. 8, the second roller group includes two rolls 2, two horizontal rolls 34, horizontal rolls necessary for maintaining the posture of the material to be rolled 39 and forming the left and right joints. The roller group provided with 35 and one upper pressing roll 8 is pointed out.

第一、第二のローラ群において、ウエブ８Ａの拘束は、ウエブ８Ａの上面側となる位置に水平ロール８をウエブガイド９に対向して配置して行い、フランジ４から腕部６にかけての屈曲部の拘束は、屈曲部の下面側に該屈曲部の形状を刻設した竪ロール２を配置して行う。   In the first and second roller groups, the web 8A is restrained by placing the horizontal roll 8 facing the web guide 9 at a position on the upper surface side of the web 8A, and bending from the flange 4 to the arm 6. The restraint of the portion is performed by arranging the scissors roll 2 in which the shape of the bent portion is engraved on the lower surface side of the bent portion.

第一のロール群では、継手部５Ａ（５Ｂ）の拘束は、継手部５Ａ（５Ｂ）の一部と腕部６の先端を下面から拘束する水平ロール３と上面から拘束する水平ロール３により行う。   In the first roll group, the joint portion 5A (5B) is restrained by the horizontal roll 3 restraining a part of the joint portion 5A (5B) and the tip of the arm portion 6 from the lower surface and the horizontal roll 3 restraining from the upper surface. .

上方の水平ロール３のロール軸は、腕部６の上下方向の厚みが変化した際、上面の拘束が可能なように架台１１に弾性体１３を介して取り付けられる。   The roll axis of the upper horizontal roll 3 is attached to the gantry 11 via the elastic body 13 so that the upper surface can be constrained when the vertical thickness of the arm portion 6 changes.

上下に配置される水平ロール３のローラ面には継手部側に、継手部の拘束に必要な形状を刻設するが、継手部５A側に配置する上下の水平ロール３には爪７Ａを曲げる際に継手部５Aを拘束する形状を、継手部５B側に配置する上下の水平ロール３には爪７Bを曲げる際に継手部５Bを拘束する形状を刻設する。   On the roller surface of the horizontal roll 3 arranged above and below, the shape necessary for restraining the joint is engraved on the joint part side, but the claw 7A is bent on the upper and lower horizontal rolls 3 arranged on the joint part 5A side. The shape which restrains the joint part 5A at the time is engraved on the upper and lower horizontal rolls 3 arranged on the joint part 5B side so as to restrain the joint part 5B when the claw 7B is bent.

第一のローラ群において、爪７Ａ（７Ｂ）を外側から内側に曲げる加工は、竪ローラ２に対向し、爪７Ａ（７Ｂ）の外側に、中心軸が位置するように配置する竪ローラ１により行う。竪ローラ１はそのローラ面に爪を所望の形状に曲げるのに必要な形状を刻設する。   In the first roller group, the process of bending the claw 7A (7B) from the outside to the inside is performed by the claw roller 1 disposed so that the central axis is positioned on the outside of the claw roller 7A (7B). Do. The scissors roller 1 has a shape necessary for bending the claw into a desired shape on the roller surface.

図２は、継手部５Ａの爪７Ａを内側に曲げる状況を説明する図で、腕部６の屈曲部を拘束する竪ロール２と、腕部６の水平部の上下を拘束する水平ロール３により腕部６の姿勢を維持した状態で、竪ロール１により爪７Ａを外側から内側に曲げ加工する。   FIG. 2 is a diagram for explaining a situation where the claw 7A of the joint portion 5A is bent inward, with the scissors roll 2 that restrains the bent portion of the arm portion 6 and the horizontal roll 3 that restrains the horizontal portion of the arm portion 6 up and down. While maintaining the posture of the arm 6, the claw 7 </ b> A is bent from the outside to the inside by the heel roll 1.

爪７Ａを内側に曲げる際、継手部５Ａが下方に押されて変形しないように、継手部５Ａの下方に配置される水平ロール３のロール面には、継手部５Ａの拘束に必要な形状を刻設する。   When the claw 7A is bent inward, the roll surface of the horizontal roll 3 disposed below the joint portion 5A has a shape necessary for restraining the joint portion 5A so that the joint portion 5A is not pushed down and deformed. Engrave.

竪ロール１、竪ロール２および水平ロール３は腕部６と継手部５Ａが水平となるように配置し、腕部６の上下の水平ロール３のローラ間隔は腕部６の上下方向の厚みとする。竪ロール１は、爪に所望する曲げ加工を施せるように中心軸を水平方向に移動可能とする。   The heel roll 1, the heel roll 2 and the horizontal roll 3 are arranged so that the arm portion 6 and the joint portion 5 </ b> A are horizontal, and the roller interval between the upper and lower horizontal rolls 3 of the arm portion 6 is the thickness of the arm portion 6 in the vertical direction. To do. The scissors roll 1 can move the central axis in the horizontal direction so that the desired bending process can be performed on the claws.

尚、継手部５Ｂの爪７Ｂを内側に曲げる竪ロール１のロール面には、図２に示した竪ロール１のロール面の刻設された形状の上下を逆にして刻設する。爪７Ｂを内側に曲げる際、継手部５Ｂに対しては上方に曲げる力が働くため、継手部５Ｂの上方に配置される水平ロール３のロール面には、継手部５Ｂの拘束に必要な形状を刻設する。   In addition, on the roll surface of the scissors roll 1 that bends the claw 7B of the joint portion 5B inward, the engraved shape of the roll surface of the scissors roll 1 shown in FIG. When the claw 7B is bent inward, a force that bends upward acts on the joint portion 5B. Therefore, the roll surface of the horizontal roll 3 disposed above the joint portion 5B has a shape necessary for restraining the joint portion 5B. Engrave.

本発明では第一のローラ群で継手部５Ａ（５B）の爪７Ａ（７Ｂ）を内側に曲げた後、第二のローラ群で継手部５Ａ（５B）を最終形状に成形する。   In the present invention, after the claws 7A (7B) of the joint portion 5A (5B) are bent inward by the first roller group, the joint portion 5A (5B) is formed into a final shape by the second roller group.

第二のローラ群では、水平ロール３４、３５により継手部５Ａ（５B）を上下から拘束して最終形状とする成形を行う。水平ロール３４、３５は、そのロール面に腕部６を拘束する水平面と継手部５Ａ（５B）を最終形状とするために刻設された形状を有し、被圧延材３９の左右において水平ロール３４または３５のいずれかが腕部６の上方に配置される場合は、腕部６の上下方向の厚みが変化した際も、上面の拘束が可能なように架台１１に弾性体１３を介して取り付ける。   In the second roller group, the horizontal rolls 34 and 35 are used to form the final shape by restraining the joint portion 5A (5B) from above and below. The horizontal rolls 34 and 35 have a horizontal surface that restrains the arm portion 6 on the roll surface and a shape engraved to make the joint portion 5A (5B) the final shape. When either 34 or 35 is disposed above the arm portion 6, the upper surface of the gantry 11 is interposed via the elastic body 13 so that the upper surface can be restrained even when the vertical thickness of the arm portion 6 changes. Install.

第二のロール群において水平ロール３４、３５とフランジ４から腕部６となる屈曲部を下方から拘束する竪ロール２は、腕部６と継手部５Ａ（５Ｂ）の扁平部が水平状態となるように配置し、水平ロール３４、３５のローラ間隔は腕部６の上下方向の厚みに設定する。   In the second roll group, the scissors roll 2 that restrains the bent part that becomes the arm part 6 from the horizontal rolls 34 and 35 and the flange 4 from below, the flat part of the arm part 6 and the joint part 5A (5B) is in a horizontal state. The roller interval between the horizontal rolls 34 and 35 is set to the thickness of the arm portion 6 in the vertical direction.

第一のロール群と第二のロール群を構成する各ローラはいずれも自由回転状態に支持され、被圧延材３９は仕上げ圧延機の駆動力で後端部を圧延中にその先端が第一のロール群と第二のロール群に進入し、後端部が仕上げ圧延された後は、慣性エネルギーとテーブルローラの搬送力により第一のロール群と第二のロール群を通材する。   Each of the rollers constituting the first roll group and the second roll group is supported in a freely rotating state, and the to-be-rolled material 39 has a leading end at the first end during rolling of the rear end portion by the driving force of the finish rolling mill. After entering the roll group and the second roll group and finish rolling the rear end portion, the first roll group and the second roll group are passed by the inertia energy and the conveying force of the table roller.

図３に継手部成形装置１０の平面図を示す。継手部成形装置１０は仕上げ圧延機の仕上げ圧延ロール２０において、継手部成形を最後に行うロール面の出口側に配置し、第一のロール群、第二のロール群を下流方向に順次配置する。   The top view of the joint part shaping | molding apparatus 10 is shown in FIG. In the finish rolling roll 20 of the finish rolling mill, the joint part forming device 10 is arranged on the outlet side of the roll surface where the joint part is finally formed, and the first roll group and the second roll group are sequentially arranged in the downstream direction. .

継手部は爪部の温度が６００℃以上の状態において成形されることが爪曲げに要する抵抗の関係から望ましく、第一のロール群と仕上げ圧延ロール２０の中心軸間の距離Ｌ１を７５０ｍｍ以内、第二のロール群と仕上げ圧延ロール２０の中心軸間の距離Ｌ２を１５００ｍｍ以内とすることが望ましい。   It is desirable that the joint part is formed in a state where the temperature of the claw part is 600 ° C. or more from the relationship of resistance required for claw bending, and the distance L1 between the first roll group and the center axis of the finish rolling roll 20 is within 750 mm, It is desirable that the distance L2 between the second roll group and the center axis of the finish rolling roll 20 be within 1500 mm.

また、第一のロール群によりねじれなどが発生した場合、第二のローラ群による熱間矯正が可能なように第一のロール群と第二のロール群は間隔を設けて配置することが望ましく、Ｌ１、Ｌ２の中心軸間距離で５００ｍｍ程度、先端クロップで切捨てる長さ以内とすることが望ましい。   Moreover, when twist etc. generate | occur | produce by the 1st roll group, it is desirable to arrange | position the 1st roll group and the 2nd roll group at intervals so that hot correction by the 2nd roller group is possible. The distance between the central axes of L1 and L2 is preferably about 500 mm and within the length to be cut off by the tip crop.

尚、第一、第二のローラ群は、種々の寸法形状の被圧延材３９について姿勢の維持が可能なように、それぞれのロールのロール軸は、取り付け位置調整可能な機構（図では省略）を用いて架台１１に取り付ける。   The first and second roller groups are mechanisms that can adjust the mounting positions of the roll shafts of the respective rolls (not shown) so that the postures of the rolled material 39 having various dimensions can be maintained. It is attached to the gantry 11 using

尚、本発明で姿勢の維持とは架台１１に対してウエブ、フランジ等被圧延材各部の座標軸上の位置が変化しないことを指し、例えば図１（ａ）（ｂ）の架台１１の正面図における被圧延材断面の位置および形状自体（継手部を除く）が変化しないことを指し、拘束とは、被圧延材の板厚やフランジから腕部にかかる屈曲部などの形状がローラ通過前後において変化しない状態を指す。   In the present invention, maintaining the posture means that the position of each part of the rolled material such as the web and the flange does not change with respect to the gantry 11, for example, a front view of the gantry 11 in FIGS. 1 (a) and 1 (b). Refers to the fact that the position and shape of the cross-section of the material to be rolled and the shape itself (excluding the joint portion) do not change. It refers to the state that does not change.

扁平スラブを粗圧延、中間圧延、仕上げ圧延後、仕上げ圧延機出側に配置した継手部製造装置を用いて継手部を成形し、有効幅９００ｍｍの左右で異なる形状の継手部を有するハット型鋼矢板を製造した。   After rough rolling, intermediate rolling, and finish rolling of flat slabs, a joint part is formed using a joint part manufacturing apparatus arranged on the exit side of the finish rolling mill, and a hat-type steel sheet pile having joint parts with different shapes on the left and right sides with an effective width of 900 mm Manufactured.

図４に本実施例に用いた製造ラインと各圧延機による圧延形状を示す。１０は爪曲げ装置、３０は粗圧延機、３１、３２は中間圧延機、３３は仕上げ圧延機、３６は加熱炉を示す。   FIG. 4 shows the production line used in this example and the rolling shape of each rolling mill. 10 is a claw bending device, 30 is a rough rolling mill, 31 and 32 are intermediate rolling mills, 33 is a finishing rolling mill, and 36 is a heating furnace.

扁平スラブは厚み：２２０ｍｍ、幅：１０００ｍｍで、１２５０〜１３００℃に加熱後、粗圧延機３０のＢＯＸ孔型で幅調整した後、Ｋ８、Ｋ７の形状の孔型で各々４〜５パスの圧延を施し、ハット型の粗形断面に成形した。   The flat slab has a thickness of 220 mm and a width of 1000 mm, is heated to 1250 to 1300 ° C., adjusted in width with the BOX hole shape of the roughing mill 30, and then rolled with 4 to 5 passes in the shape of the K8 and K7 shapes. And formed into a hat-shaped rough cross section.

その後、タンデム配置した中間圧延機３１、３２により第１パスは孔型Ｋ５、Ｋ６の順に、第２パスは孔型Ｋ６、Ｋ５の順に圧延した後、第３パスを圧延するために被圧延材を孔型Ｋ４の入り側に移動させ、孔型Ｋ４、Ｋ３により圧延した。   Thereafter, the intermediate rolling mills 31 and 32 arranged in tandem roll the first pass in the order of the hole types K5 and K6, the second pass in the order of the hole types K6 and K5, and then the material to be rolled to roll the third pass. Was moved to the entrance side of the hole mold K4 and rolled by the hole molds K4 and K3.

被圧延材は、中間圧延機３１、３２による中間圧延後、比較的高温な状態で仕上げ圧延機３３の孔型Ｋ２により仕上げ圧延され、仕上げ圧延機３３の孔型Ｋ２の出側に配置された爪曲げ装置１０により継手部を仕上げる。   The material to be rolled was subjected to finish rolling by the hole mold K2 of the finish rolling machine 33 in a relatively high temperature state after intermediate rolling by the intermediate rolling mills 31 and 32, and arranged on the exit side of the hole mold K2 of the finish rolling mill 33. The joint is finished by the nail bending device 10.

仕上げ圧延機３３の孔型Ｋ２による圧延速度は、被圧延材の先端が爪曲げ装置１０の第２ロール群を通過するまでは１．０〜２．０ｍ／ｓとし、４．０〜６．０ｍ／ｓに加速後、仕上げ圧延機３３からの蹴りだしを３．０〜５．０ｍ／ｓとして、被圧延材の尾端が爪曲げ装置１０内において詰まって残ることを防止する。   The rolling speed of the finish rolling mill 33 with the hole shape K2 is 1.0 to 2.0 m / s until the tip of the material to be rolled passes through the second roll group of the claw bending device 10. After accelerating to 0 m / s, kicking from the finish rolling mill 33 is set to 3.0 to 5.0 m / s to prevent the tail end of the material to be rolled from clogging and remaining in the claw bending apparatus 10.

爪曲げ装置１０は第一のロール群と第二のロール群を備え、仕上げ圧延機の孔型K２が刻設された圧延ロールの中心軸から第一のロール群の中心軸までを７５０ｍｍ、圧延ロール中心から第二のロール群の中心軸までを１２５０ｍｍとし、３．０ｍ／ｓで圧延して爪曲げ装置１０内において尾端を詰まらせることなく継手部の爪曲げを完了した。   The claw bending device 10 includes a first roll group and a second roll group, and is 750 mm from the center axis of the rolling roll in which the hole mold K2 of the finish rolling mill is engraved to the center axis of the first roll group. The claw bending of the joint portion was completed without clogging the tail end in the claw bending apparatus 10 by rolling at 3.0 m / s from the roll center to the central axis of the second roll group at 1250 mm.

尚、この際、爪部温度は６００℃以上であり、第一のロール群にたいして第二のロール群を中心軸間距離で５００ｍｍ離すことによる、軸曲がりの熱間矯正機能が認められた。   In addition, the nail | claw part temperature was 600 degreeC or more in this case, and the hot straightening function of the axis | shaft bending by separating the 2nd roll group with the center axis | shaft distance 500mm with respect to the 1st roll group was recognized.

また、圧延ロールの中心軸から第一のロール群の中心軸までを１０００ｍｍ以内、圧延ロール中心から第二のロール群の中心軸までを１５００ｍｍ以内とすれば、３．０ｍ／ｓで圧延して爪曲げ装置１０内において尾端を詰まらせることなく継手部の爪曲げが可能なことを確認した。   Further, if the distance from the center axis of the rolling roll to the center axis of the first roll group is within 1000 mm and the distance from the center of the rolling roll to the center axis of the second roll group is within 1500 mm, rolling is performed at 3.0 m / s. It was confirmed that the claw bending of the joint portion was possible without clogging the tail end in the claw bending device 10.

本発明の一実施形態にかかる爪曲げ装置の正面図を示し、（ａ）は第一のローラ群、（ｂ）は第二のローラ群を正面図。The front view of the nail | claw bending apparatus concerning one Embodiment of this invention is shown, (a) is a 1st roller group, (b) is a front view of a 2nd roller group. 図１に示した爪曲げ装置の上面図。The top view of the nail | claw bending apparatus shown in FIG. 本発明による爪曲げ加工の要部を示す図。The figure which shows the principal part of the nail | claw bending process by this invention. 実施例に用いた製造ラインを示す図。The figure which shows the production line used for the Example. 従来例。Conventional example. 従来例。Conventional example.

符号の説明Explanation of symbols

１、２ 竪ロール
３ 水平ロール
４ フランジ
５Ａ、５Ｂ 継手部
６ 腕部
７A、７Ｂ 爪
８ 上押さえロール
８Ａ ウエブ
９ ウエブガイド
１０ 爪曲げ装置本体
１１ 架台
１２ 移動機構
１３ 弾性体
３０ 粗圧延機
３１、３２ 中間圧延機
３３ 仕上げ圧延機
３４、３５ 水平ロール
３６ 加熱炉
３９ 被圧延材
４０ フランジ
５０ 曲げ力
５０Ａ、５０Ｂ 継手部
５１、５２ ロール側壁
５３、５４ 爪部
５５ 継手部
５６ 圧下量
６０ 腕部
８０Ａ 成形ウエブ
３９０ ハット型鋼矢板 DESCRIPTION OF SYMBOLS 1, 2 Coral roll 3 Horizontal roll 4 Flange 5A, 5B Joint part 6 Arm part 7A, 7B Claw 8 Upper holding roll 8A Web 9 Web guide 10 Claw bending apparatus main body 11 Mount 12 Moving mechanism 13 Elastic body 30 Rough rolling mill 31, 32 Intermediate rolling mill 33 Finish rolling mill 34, 35 Horizontal roll 36 Heating furnace 39 Rolled material 40 Flange 50 Bending force 50A, 50B Joint part 51, 52 Roll side wall 53, 54 Claw part 55 Joint part 56 Reduction amount 60 Arm part 80A Formed web 390 Hat-type steel sheet pile

Claims (5)

仕上げ圧延後に、熱間で継手部の爪曲げを行い所望の形状とする、腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法であって、爪を内側に曲げる第一の工程と、爪を最終形状に成形する第二の工程を有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法。   A method for claw bending of a hat-type steel sheet pile having joint portions with different shapes on the left and right ends of the arm portion after the finish rolling, and bending the claws of the joint portion to a desired shape. A claw bending method for a hat-type steel sheet pile having joint portions having different shapes on the left and right ends of the arm portion, comprising one step and a second step of forming the claw into a final shape. 前記第一の工程と前記第二の工程を、仕上げ圧延後の姿勢を維持しながら行うことを特徴とする請求項１記載の腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ方法。   The first step and the second step are performed while maintaining the posture after finish rolling. The hat-type steel sheet pile having joint portions having different shapes on both right and left ends of the arm portion according to claim 1. Nail bending method. 仕上げ圧延機の出側近傍に配置して、熱間で継手部の爪曲げを行う、腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置であって、
前記爪曲げ装置が、前記腕部両端部において、爪を内側に曲げる第一のローラ群と、前記第一のローラ群の下流側に配置され、継手部を所望の形状に成形する第二のローラ群とを有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。 A claw bending device for a hat-type steel sheet pile having a joint part of a different shape on the left and right ends of the arm part, which is arranged in the vicinity of the exit side of the finish rolling mill and performs hot claw bending of the joint part,
The claw bending device is disposed at the both ends of the arm part at a downstream side of the first roller group for bending the claw inward, and a second part for forming the joint part into a desired shape. A hat-type steel sheet pile claw bending device having joint portions of different shapes on both right and left ends of an arm portion, characterized by comprising a group of rollers. 前記第一のローラ群と前記第二のローラ群はいずれも無駆動のローラからなり、前記第一のローラ群は、ハット型鋼矢板の中央ウエブの上面側で前記中央ウエブの変形を拘束するように配置される水平ロールと、継手部の一部を含む腕部端部の上下で対向するように配置され、上下方向の姿勢を維持する水平ロールと腕部の水平方向の姿勢を維持するように配置される竪ロールと、前記竪ロールに対向して配置され継手部の爪を内側に曲げる竪ロールを有し、前記第二のローラ群は、ハット型鋼矢板の中央ウエブの上面側に配置され前記中央ウエブの変形を拘束する水平ロールと、継手部を含む腕部端部の上下に対向して配置され、上下方向の姿勢維持と継手部を所望の形状とする水平ロールと、腕部の水平方向の姿勢を維持するように配置される竪ロールを有していることを特徴とする腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。   The first roller group and the second roller group are both composed of non-driven rollers, and the first roller group restrains deformation of the central web on the upper surface side of the central web of the hat-type steel sheet pile. The horizontal roll placed on the arm and the arm end including a part of the joint part are opposed to each other at the top and bottom, so that the horizontal roll that maintains the vertical posture and the horizontal posture of the arm are maintained. And a second roll group disposed on the upper surface side of the central web of the hat-type steel sheet pile. A horizontal roll that restrains the deformation of the central web, a horizontal roll that is disposed opposite to the top and bottom of the end of the arm including the joint, and has a desired shape of the joint in the vertical direction, and the arm Placed to maintain horizontal orientation Nail bending apparatus of hat-type metal sheet pile having a joint portion of a different shape to the left and right ends of the arms, characterized in that vertical and has a role to be. 前記第一のローラ群と前記第二のローラ群は、熱間矯正機能が得られるように間隔を設けて配置され、前記第一のローラ群は仕上げ圧延機の圧延ロール中心から１０００ｍｍ以内、前記第二のローラ群は仕上げ圧延機の圧延ロール中心から１５００ｍｍ以内に配置されていることを特徴とする請求項３または４記載の腕部の左右両端に異なる形状の継手部を有するハット型鋼矢板の爪曲げ装置。   The first roller group and the second roller group are arranged at intervals so as to obtain a hot straightening function, and the first roller group is within 1000 mm from the center of the rolling roll of the finish rolling mill, The second roller group is disposed within 1500 mm from the center of the rolling roll of the finish rolling mill. The hat-type steel sheet pile having joint portions having different shapes on the left and right ends of the arm portion according to claim 3 or 4, Nail bending device.
JP2005090546A 2005-03-28 2005-03-28 Method and device for bending claw of hat-type steel sheet piling joint Pending JP2006272343A (en)

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WO2008041677A1 (en) 2006-10-03 2008-04-10 Ntt Docomo, Inc. Base station device
WO2011150580A1 (en) * 2010-05-31 2011-12-08 南京万汇钢板桩有限公司 Ω shape corner pile and it's continuous roll type cold-bend forming method
CN105728515A (en) * 2016-03-03 2016-07-06 安徽工业大学 Forming method of hot-rolled U-shaped steel plate piles
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JPWO2021140728A1 (en) * 2020-01-10 2021-07-15

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008041677A1 (en) 2006-10-03 2008-04-10 Ntt Docomo, Inc. Base station device
WO2011150580A1 (en) * 2010-05-31 2011-12-08 南京万汇钢板桩有限公司 Ω shape corner pile and it's continuous roll type cold-bend forming method
CN105728515A (en) * 2016-03-03 2016-07-06 安徽工业大学 Forming method of hot-rolled U-shaped steel plate piles
JP2018126748A (en) * 2017-02-07 2018-08-16 新日鐵住金株式会社 Manufacturing method for sheet pile and joint-shaping rolling machine for sheet pile
JPWO2021140728A1 (en) * 2020-01-10 2021-07-15
WO2021140728A1 (en) * 2020-01-10 2021-07-15 Ｊｆｅスチール株式会社 Method of producing steel sheet pile, and rolling equipment line for producing steel sheet pile
JP2022031515A (en) * 2020-01-10 2022-02-18 Ｊｆｅスチール株式会社 Manufacturing method for steel sheet pile and rolling equipment line for manufacturing steel sheet pile
JP7031788B2 (en) 2020-01-10 2022-03-08 Ｊｆｅスチール株式会社 Steel sheet pile manufacturing method and rolling equipment line for steel sheet pile manufacturing
CN114929405A (en) * 2020-01-10 2022-08-19 杰富意钢铁株式会社 Method for manufacturing steel sheet pile and rolling equipment set for manufacturing steel sheet pile
JP7127729B2 (en) 2020-01-10 2022-08-30 Ｊｆｅスチール株式会社 Steel sheet pile manufacturing method and rolling equipment train for steel sheet pile manufacturing

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