JP3522089B2 - Method of Partial Wall Thickening of Tube and Partial Wall Thickening Equipment of Tube - Google Patents
Method of Partial Wall Thickening of Tube and Partial Wall Thickening Equipment of TubeInfo
- Publication number
- JP3522089B2 JP3522089B2 JP23876197A JP23876197A JP3522089B2 JP 3522089 B2 JP3522089 B2 JP 3522089B2 JP 23876197 A JP23876197 A JP 23876197A JP 23876197 A JP23876197 A JP 23876197A JP 3522089 B2 JP3522089 B2 JP 3522089B2
- Authority
- JP
- Japan
- Prior art keywords
- thickened portion
- steel pipe
- thickness
- heating
- shaping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Forging (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、たとえば鉄骨構造
物の支柱間を梁材により連結する際に、支柱側の連結部
に、板厚確保などのための増肉部を形成するのに採用さ
れる管体の部分増肉方法および管体の部分増肉設備に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to form a thickened portion for securing a plate thickness, for example, at a connecting portion on the supporting pillar side when connecting supporting pillars of a steel frame structure by a beam member. The present invention relates to a method for partially increasing the thickness of a pipe and a facility for partially increasing the thickness of the pipe.
【0002】[0002]
【従来の技術】従来、支柱側の梁材連結部は、支柱、す
なわち角形鋼管を長さ方向において複数に切断するとと
もに、切断面にそれぞれ開先加工を行ったのち、ダイヤ
フラムを取り付ける梁貫通方式が採用されていたが、こ
の方式によると、切断作業や開先加工作業に多大な時間
と経費とが必要になり、しかも溶接箇所が多いなどの問
題がある。2. Description of the Related Art Conventionally, a beam member connecting portion on a supporting column side is a beam penetrating method in which a supporting column, that is, a rectangular steel pipe is cut into a plurality of pieces in a length direction, and a groove is formed on each cut surface, and then a diaphragm is attached. However, according to this method, a great deal of time and cost are required for cutting work and groove processing work, and there are problems such as many welding points.
【0003】また、角形鋼管の切断を行わない工法とし
て、たとえば特開平7−238636号公報に見られる
ように、両面の周囲に裏当て金を仮付け溶接した内ダイ
ヤフラムを角形鋼管内に挿入させて所定位置に位置決め
し、次いで挿入口側の裏当て金を角形鋼管の内壁に仮付
け溶接したのち、貫通孔を利用して、角形鋼管の内壁と
内ダイヤフラムの外周とをエレクトスラグ溶接する工法
が提案されているが、この工法でも溶接作業が必要であ
った。Further, as a construction method in which the rectangular steel pipe is not cut, for example, as shown in Japanese Patent Application Laid-Open No. 7-238636, an inner diaphragm having a backing metal temporarily welded to both sides is inserted into the rectangular steel pipe. After tentatively welding the backing plate on the insertion port side to the inner wall of the rectangular steel pipe, the inner wall of the rectangular steel pipe and the outer periphery of the inner diaphragm are electroslag welded using the through holes. Was proposed, but welding work was required even with this method.
【0004】そこで、溶接作業を不要とし得るものとし
て、たとえば特開平9−76011号公報に見られるよ
うに、金属管の目的とする箇所に増肉部を形成すること
が提案されている。この増肉方法は、固定装置と圧縮装
置との間に角形管をセットして、この角形管に長手方向
の圧縮力を加えた状態で、加熱装置により角形管を局部
的に加熱して加熱部を形成し、この加熱部を長手方向に
移動させて増肉部を連続して形成している。その際に、
増肉部に生じようとするゆがみを防止するために、角形
管の内側に熱処理用ダイスがセットされている。Therefore, it is proposed to form a thickened portion at a desired portion of a metal pipe as disclosed in, for example, Japanese Patent Laid-Open No. 9-76011, which makes welding work unnecessary. In this thickening method, a rectangular tube is set between a fixing device and a compression device, and the rectangular tube is heated by locally heating the rectangular tube with a heating force applied to the rectangular tube. The heating portion is moved in the longitudinal direction to continuously form the thickened portion. At that time,
A heat treatment die is set inside the rectangular tube in order to prevent distortion that tends to occur in the thickened portion.
【0005】[0005]
【発明が解決しようとする課題】しかし、上記した増肉
方法によると、形成した増肉部の外形寸法が不揃いにな
る恐れがあり、したがって、金属管を支柱に使用して梁
材を連結する際に、両者間に不均一な隙間が生じて良好
な溶接(連結)が行えない恐れがある。さらに増肉部の
外面が波状(凹凸状)となって、溶接精度や強度の面で
低下を招く恐れがある。また金属管に対しては、その長
手方向の両端から圧縮力を加えた状態になることから、
両端から離れた位置にある加熱部には充分な圧縮力が均
一に掛り難く、好適な増肉部の形成が行えず、さらに金
属管の非加熱部が変形される恐れもある。However, according to the above-described thickening method, the outer dimensions of the thickened portion formed may be uneven, and therefore, the metal pipes are used as the columns to connect the beam members. At this time, a non-uniform gap may occur between the two, and good welding (connection) may not be performed. Furthermore, the outer surface of the thickened portion may have a wavy shape (unevenness), which may lead to a decrease in welding accuracy and strength. In addition, since a compressive force is applied to both ends of the metal pipe in the longitudinal direction,
It is difficult to apply a sufficient compressive force uniformly to the heating portions located away from both ends, a suitable thickening portion cannot be formed, and the non-heating portion of the metal tube may be deformed.
【0006】そこで本発明のうち請求項1記載の発明
は、形成した増肉部の外形寸法を均一状にし得るととも
に、増肉部の外面と内面とを平滑化し得る管体の部分増
肉方法を提供することを目的としたものである。Therefore, according to the first aspect of the present invention, a method of partially increasing the thickness of a tubular body, in which the outer dimensions of the formed thickness increase portion can be made uniform and the outer surface and the inner surface of the thickness increase portion can be smoothed The purpose is to provide.
【0007】また請求項4記載の発明は、請求項1〜3
の部分増肉方法を好適に実現し得るとともに、圧縮力を
均一に掛け得る管体の部分増肉設備を提供することを目
的としたものである。The invention according to claim 4 is the same as claims 1 to 3.
The object of the present invention is to provide a partial thickness increase equipment for a tubular body, which can suitably realize the partial thickness increase method of (1) and can apply a compression force uniformly.
【0008】[0008]
【課題を解決するための手段】前述した目的を達成する
ために、本発明のうちで請求項1記載の管体の部分増肉
方法は、管体の目的とする箇所を加熱したのち、この管
体に長手方向の圧縮力を付与して、目的とする箇所に増
肉部を形成し、増肉した後に、管体と、外面整形用の成
形ロール手段ならびに内面整形用の成形部とを、管体の
長手方向に相対的に移動させて、成形ロール手段によ
り、加熱状態の増肉部の外面を整形するとともに、成形
ロール手段に対向された成形部により、加熱状態の増肉
部の内面を整形することを特徴としたものである。In order to achieve the above-mentioned object, in the method for partially increasing the thickness of a pipe according to the first aspect of the present invention, after heating a target portion of the pipe, By applying a compressive force in the longitudinal direction to the tubular body to form a thickened portion at a desired location, and after thickening the tubular body, a molded roll means for shaping the outer surface and an inner surface shaping And the forming part of the tube body are relatively moved in the longitudinal direction of the tubular body, and the outer surface of the thickened part in the heated state is shaped by the forming roll means and
Increased thickness in the heated state by the molding section facing the roll means
It is characterized by shaping the inner surface of the part .
【0009】したがって請求項1の発明によると、加熱
状態の増肉部の外面と内面とを整形することにより、増
肉部の外面は、その外形寸法を均一状にし得るととも
に、増肉部の外面と内面とを平滑化し得る。したがっ
て、たとえば整形後の管体を支柱に使用し、その増肉部
に梁材を連結する際に、増肉部の外面は、その外形寸法
が均一状でかつ平滑化されていることから、両者間に隙
間があまり生ぜずまたは均一で小さな隙間となる。Therefore, according to the first aspect of the present invention, by shaping the outer surface and the inner surface of the thickened portion in the heated state, the outer surface of the thickened portion can have a uniform outer dimension and the thickened portion The outer surface and the inner surface can be smoothed. Therefore, for example, when the tubular body after shaping is used as a column and the beam material is connected to the thickened portion, the outer surface of the thickened portion has a uniform outer shape and is smoothed, There are few gaps between them, or they are uniform and small gaps.
【0010】また本発明の請求項2記載の管体の部分増
肉方法は、上記した請求項1記載の構成において、増肉
部の外面を、非増肉部の外面と面一状に整形することを
特徴としたものである。According to a second aspect of the present invention, there is provided a method for partially increasing the thickness of a tubular body according to the first aspect, wherein the outer surface of the thickened portion is flush with the outer surface of the non-thickened portion. It is characterized by doing.
【0011】したがって請求項2の発明によると、増肉
部を形成した管体の外面は、突出部材のないすっきりし
た状態にし得る。そして本発明の請求項3記載の管体の
部分増肉方法は、上記した請求項1記載の構成におい
て、増肉部の内面を、非増肉部の内面と面一状に整形す
ることを特徴としたものである。Therefore, according to the second aspect of the present invention, the outer surface of the tube body having the thickened portion can be in a clean state without the protruding member. The method for partially increasing the wall thickness of the tubular body according to claim 3 of the present invention is characterized in that, in the configuration according to claim 1 described above, the inner surface of the thickened portion is shaped flush with the inner surface of the non-thickened portion. It is a feature.
【0012】したがって請求項3の発明によると、増肉
部を形成した管体の内面は、突出しないすっきりした状
態にし得る。さらに本発明の請求項4記載の管体の部分
増肉設備は、管体の目的とする箇所を中にして、管体の
長手方向の二箇所を保持自在な一対のクランプ手段が設
けられ、これらクランプ手段は相対的に接近離間移動自
在に構成され、管体の目的とする箇所を加熱させる加熱
手段が設けられ、部分増肉を行った管体に対して、この
管体の長手方向に相対的に移動させることで、加熱状態
の増肉部の外面を整形する成形ロール手段と内面を整形
する成形部とが対向して設けられていることを特徴とし
たものである。Therefore, according to the third aspect of the present invention, the inner surface of the tubular body having the thickened portion can be made into a clean state without protruding. Further, the partial thickness increase equipment for a pipe according to claim 4 of the present invention is provided with a pair of clamp means capable of holding two positions in the longitudinal direction of the pipe with the target position of the pipe as a center. These clamping means are configured so as to be relatively movable toward and away from each other, and are provided with heating means for heating a target portion of the tubular body, and in the longitudinal direction of the tubular body with respect to the partially thickened tubular body. By relatively moving, the forming roll means for shaping the outer surface and the inner surface of the thickened part in the heated state are shaped
It is characterized in that it is provided so as to face the molding part .
【0013】したがって請求項4の発明によると、管体
の目的とする箇所の両側をクランプ手段によりクランプ
し、そして目的とする箇所を加熱手段により加熱したの
ち、クランプ手段を相対的に接近移動させて管体に長手
方向の圧縮力を付与することで、目的とする箇所に増肉
部を形成し得る。このように増肉した後に、管体と、外
面整形用の成形ロール手段ならびに内面整形用の成形部
とを、管体の長手方向に相対的に移動させることで、成
形ロール手段により、加熱状態の増肉部の外面を整形し
得るとともに、成形部により増肉部の内面を整形し得
る。その際に圧縮力を、加熱部の近くに位置している両
クランプ手段により掛けることから、この加熱部に充分
な圧縮力を均一に掛け得る。Therefore, according to the fourth aspect of the present invention, both sides of the target portion of the tubular body are clamped by the clamp means, the target portion is heated by the heating means, and then the clamp means is moved relatively close to each other. By applying a compressive force in the longitudinal direction to the tubular body, the thickened portion can be formed at a desired location. Thus after Zoniku, a tube body, the outer
And a molding portion for molding roll means and the inner surface shaping for surface shaping <br/>, by relatively moving in the longitudinal direction of the tube, the forming roll unit, shaping the outer surface of the thickened portion of the heated state The inner surface of the thickened part can be shaped by the molding part.
It At this time, since the compressive force is applied by both clamp means located near the heating part, a sufficient compressive force can be uniformly applied to the heating part.
【0014】[0014]
【発明の実施の形態】以下に、本発明の第一の実施の形
態を、丸鋼管の部分増肉に採用した状態として図1〜図
7に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 to 7 as a state of being adopted for partially increasing the thickness of a round steel pipe.
【0015】図7の(A)において、管体の一例である
丸鋼管1としては、厚さが4.5mm〜50.0mm、
直径が100mm〜600mmで、SM490A、SM
520B、SS400、SN400B、SN490Bな
どからなるものが使用される。そして丸鋼管1は、長手
方向Aにおける一箇所(または複数箇所)の或る範囲
が、目的とする増肉箇所Bに設定される。In FIG. 7A, a round steel pipe 1 as an example of a tubular body has a thickness of 4.5 mm to 50.0 mm,
SM490A, SM with diameter of 100mm-600mm
520B, SS400, SN400B, SN490B, etc. are used. Then, in the round steel pipe 1, a certain range of one location (or a plurality of locations) in the longitudinal direction A is set as a target thickening location B.
【0016】図1において、管体の部分増肉設備10に
は、丸鋼管1を支持自在な支持手段11が設けられ、こ
の支持手段11により丸鋼管1は、その長手方向Aを横
方向として支持される。この支持手段11は、たとえば
鼓形ローラ12群により丸鋼管1を支持するローラコン
ベヤ形式とされ、この丸鋼管1の長手方向Aにおける移
動(搬送)を許すように構成されている。In FIG. 1, a partial thickening equipment 10 for a pipe is provided with a supporting means 11 capable of supporting the round steel pipe 1, and the supporting means 11 allows the round steel pipe 1 to have its longitudinal direction A as a lateral direction. Supported. The support means 11 is of a roller conveyor type for supporting the round steel pipe 1 by, for example, a group of hourglass-shaped rollers 12, and is configured to allow movement (conveyance) of the round steel pipe 1 in the longitudinal direction A.
【0017】前記支持手段11により支持された丸鋼管
1の目的とする増肉箇所Bを中にして、この丸鋼管1の
長手方向Aの二箇所を保持自在な一対のクランプ手段1
5,16が設けられ、これらクランプ手段15,16は
相対的に接近離間移動自在に構成されている。すなわち
クランプ手段15,16は、丸鋼管1の挿通を許すよう
に構成され、この挿通された丸鋼管1を外側からクラン
プ自在に構成されている。そしてクランプ手段15,1
6は、たとえば台車17,18上に設けられて、台車1
7,18の走行により接近離間方向に移動自在であり、
その際に台車17,18の走行は、床側との間に設けら
れたシリンダー装置や、搭載した走行動装置などで行わ
れる。A pair of clamping means 1 which can hold two locations in the longitudinal direction A of the round steel pipe 1 with the intended thickening portion B of the round steel pipe 1 supported inside by the inside.
5, 16 are provided, and the clamping means 15, 16 are configured to be relatively movable toward and away from each other. That is, the clamping means 15 and 16 are configured to allow the round steel pipe 1 to be inserted therethrough, and the inserted round steel pipe 1 can be clamped from the outside. And the clamping means 15, 1
6 is provided, for example, on the carriages 17 and 18, and the carriage 1
It is possible to move in the approaching / separating direction by traveling 7 and 18,
At that time, traveling of the carriages 17 and 18 is performed by a cylinder device provided between the carriage 17 and the floor side, a traveling moving device mounted therein, or the like.
【0018】前記クランプ手段15,16間には、丸鋼
管1の増肉箇所Bを加熱させる加熱手段20が設けられ
る。この加熱手段20としては、高周波加熱方式や中周
波加熱方式などが採用され、丸鋼管1の挿通を許すよう
に構成されている。前記加熱手段20は、送り装置21
の作動により丸鋼管1の長手方向Aに移動自在であり、
そして送り装置21としては、ねじ送り形式やシリンダ
ー形式などが採用される。A heating means 20 for heating the thickened portion B of the round steel pipe 1 is provided between the clamping means 15 and 16. As the heating means 20, a high-frequency heating method, a medium-frequency heating method, or the like is adopted, and is configured to allow the round steel pipe 1 to be inserted. The heating means 20 includes a feeding device 21.
Is movable in the longitudinal direction A of the round steel pipe 1,
As the feeding device 21, a screw feeding type or a cylinder type is adopted.
【0019】図1、図5、図6において、一方のクラン
プ手段15に対して長手方向Aの外側に位置される状態
で成形ロール手段25が設けられ、この成形ロール手段
25は、部分増肉を行った丸鋼管1に対して長手方向A
に相対的に移動されることで、加熱状態の増肉部2の外
面2aを整形するように構成されている。すなわち成形
ロール手段25は、四個(複数個)の鼓形成形ロール2
6を有し、これら鼓形成形ロール26は、円状の成形面
を形成するように配置され、そしてフレーム27側の保
持部材28に、ロール軸29を介して回転自在に支持さ
れている。なお成形ロール手段25、特に鼓形成形ロー
ル26としては、水冷形式が採用される。1, 5, and 6, the forming roll means 25 is provided in a state of being positioned outside the one clamping means 15 in the longitudinal direction A, and the forming roll means 25 is partially thickened. The longitudinal direction A for the round steel pipe 1
The outer surface 2a of the thickened portion 2 in the heated state is shaped by being relatively moved to. That is, the forming roll means 25 is composed of four (plural) drum-shaped forming rolls 2.
6, the drum-shaped rolls 26 are arranged so as to form a circular molding surface, and are rotatably supported by a holding member 28 on the frame 27 side via a roll shaft 29. A water-cooling type is adopted as the forming roll means 25, particularly the drum-shaped roll 26.
【0020】前記加熱手段20の部分から成形ロール手
段25の部分に対向されて、管内面成形手段30が設け
られる。すなわち管内面成形手段30は、その大部分が
丸鋼管1内に挿入位置されるもので、加熱手段20の部
分に対向される大径成形部31と成形ロール手段25の
部分に対向される小径成形部32とがステー33により
一体化されており、そしてステー33を介して他方端の
外方に設けられた固定部34に支持されている。なお管
内面成形手段30の特に大径成形部31や小径成形部3
2としては、水冷形式が採用される。A pipe inner surface forming means 30 is provided so as to face the forming roll means 25 from the heating means 20. That is, most of the pipe inner surface forming means 30 is positioned to be inserted into the round steel pipe 1, and a large diameter forming portion 31 facing the heating means 20 and a small diameter facing the forming roll means 25. The molding portion 32 is integrated with a stay 33, and is supported by a fixing portion 34 provided outside the other end via the stay 33. The large-diameter molding portion 31 and the small-diameter molding portion 3 of the pipe inner surface molding means 30
For 2, a water-cooled type is adopted.
【0021】以下に、上記した第一の実施の形態におい
て管体の部分増肉作用を説明する。まず、部分増肉を行
う前の丸鋼管1が、図2に示されるように、支持手段1
1の鼓形支持ロール12群を介して一方端から他方端側
へと搬入(移動)される。この搬入の際に、丸鋼管1は
成形ロール手段25からクランプ手段15、加熱手段2
0、クランプ手段16へと挿通され、また丸鋼管1内に
管内面成形手段30が挿入される。そして所定量の移動
が行われることで、図1に示されるように、増肉箇所B
が、一対のクランプ手段15,16間でかつ加熱手段2
0の作用範囲内に位置される。The partial thickening action of the pipe body in the above-described first embodiment will be described below. First, as shown in FIG. 2, the round steel pipe 1 before the partial thickness increase is supported by the supporting means 1
It is carried in (moved) from one end to the other end side via the group of 12 hourglass-shaped support rolls. At the time of this loading, the round steel pipe 1 moves from the forming roll means 25 to the clamping means 15 and the heating means 2.
No. 0, the clamp means 16 is inserted, and the pipe inner surface forming means 30 is inserted into the round steel pipe 1. Then, by moving a predetermined amount, as shown in FIG.
Between the pair of clamping means 15 and 16 and the heating means 2
It is located within the working range of zero.
【0022】次いで、両クランプ手段15,16がクラ
ンプ動され、以て丸鋼管1の増肉箇所Bの両側部分がク
ランプされる。その際に、クランプ力によって、丸鋼管
1が鼓形支持ロール12側に必要以上に押し付けられる
ことがないように、精度よく構成され、かつ押し付け力
の回避構成がなされている。Then, both clamping means 15 and 16 are clamped to clamp both side portions of the thickened portion B of the round steel pipe 1. At that time, the round steel pipe 1 is configured with high precision and the pressing force is avoided so that the round steel pipe 1 is not pressed against the hourglass-shaped support roll 12 side more than necessary.
【0023】両クランプ手段15,16により丸鋼管1
の増肉箇所Bの両側部分がクランプされた前後に、増肉
箇所Bの一方端側(いずれかの端側)に加熱手段20が
対向されており、この状態で、まず加熱手段20により
対向部分の局部加熱が行われる。そして所定温度まで加
熱が行われたのち、両クランプ手段15,16が互いに
接近移動され、またはいずれか一方が他方側へ接近移動
される。The round steel pipe 1 is provided by the two clamping means 15 and 16.
Before and after both sides of the thickened portion B are clamped, the heating means 20 is opposed to one end side (either end side) of the thickened portion B. In this state, the heating means 20 firstly opposes each other. Local heating of the part takes place. Then, after heating to a predetermined temperature, both clamp means 15 and 16 are moved closer to each other, or one of them is moved closer to the other side.
【0024】これにより図3の実線に示すように、両ク
ランプ手段15,16間に長手方向Aの圧縮力が付与さ
れ、以て圧縮力により加熱部が内外へと増肉されて、増
肉部2が成形されることになる。このとき、内側への増
肉量は大径成形部31に当接されることで規制され、か
つ大径成形部31への当接により増肉部2の内面2bが
整形される。その際に圧縮力は、加熱部の近くに位置さ
れている両クランプ手段15,16により掛けられるこ
とから、この加熱部には充分な圧縮力を均一に掛ること
になり、以て好適な厚肉部2の形成が行え、さらに丸鋼
管1の非加熱部が変形される恐れもない。As a result, as shown by the solid line in FIG. 3, a compressive force in the longitudinal direction A is applied between the clamp means 15 and 16, whereby the compressive force increases the thickness of the heating portion inward and outward to increase the thickness. The part 2 will be molded. At this time, the amount of increase in thickness to the inside is regulated by contact with the large-diameter molding portion 31, and the inner surface 2b of the thickness-increasing portion 2 is shaped by contact with the large-diameter molding portion 31. At this time, the compressive force is applied by both the clamp means 15 and 16 located near the heating part, so that a sufficient compressive force is evenly applied to the heating part, so that a suitable thickness is obtained. The meat portion 2 can be formed, and there is no fear that the non-heated portion of the round steel pipe 1 is deformed.
【0025】次いで図3の仮想線に示すように、送り装
置21の作動によって加熱手段20がクランプ手段16
側へ所定量送られ、そして上述と同様に加熱と圧縮力付
与とが行われることで、増肉部2が、長手方向Aにおい
てクランプ手段16側へ拡大される。この繰り返しによ
り、図3の仮想線に示すように長手方向Aにおいて所定
長さの増肉部2が形成され、その後に、両クランプ手段
15,16によるクランプが開放される。なお増肉部2
の成形により、丸鋼管1は少し縮む状態になる。Then, as shown by the phantom line in FIG. 3, the heating means 20 is moved to the clamping means 16 by the operation of the feeding device 21.
By feeding a predetermined amount to the side, and heating and applying a compressive force in the same manner as described above, the thickened portion 2 is expanded in the longitudinal direction A toward the clamp means 16 side. By repeating this, the thickened portion 2 having a predetermined length in the longitudinal direction A is formed as shown by an imaginary line in FIG. 3, and thereafter, the clamping by the clamping means 15 and 16 is released. The thickened part 2
The round steel pipe 1 is in a state of being slightly shrunk by the molding.
【0026】そして、増肉部2が形成された丸鋼管1を
搬出させる。このとき、増肉部2に成形ロール手段25
の鼓形成形ロール26群が作用され、以て加熱状態の増
肉部2は、図5、図6に示すように、その外面2aが非
増肉部、すなわち丸鋼管1の外面1aと面一状に整形さ
れることになる。このような整形時において増肉部2
は、小径成形部32との間に生じている隙間Sを利用し
て内側へと押し込まれる状態になり、その際に内側への
押し込み量は小径成形部32に当接されることで規制さ
れ、かつ小径成形部32への当接により増肉部2の内面
2bが再び整形される。Then, the round steel pipe 1 on which the thickened portion 2 is formed is carried out. At this time, the forming roll means 25 is added to the thickened portion 2.
5, the outer wall 2a of the thickened portion 2 in the heated state is a non-thickened portion, that is, the outer surface 1a of the round steel pipe 1 and the surface thereof. It will be shaped like a sheet. During such shaping, the thickened portion 2
Is in a state of being pushed inward by utilizing the gap S formed between the small diameter molding portion 32 and the amount of pushing inward at that time is regulated by being brought into contact with the small diameter molding portion 32. The inner surface 2b of the thickened portion 2 is shaped again by the contact with the small-diameter molding portion 32.
【0027】なお、増肉部2が形成された丸鋼管1の搬
出は、鼓形成形ロール26群を駆動ロール化すること
で、または別な送り手段により行われる。前述したよう
な整形により増肉部2の外面2aは、その外形寸法を均
一状にし得るとともに平滑化し得る。なお整形時におい
て増肉部2は、少し伸びる状態になる。このようにして
増肉部2が成形されかつ外面2aと内面2bとが整形さ
れた丸鋼管1、すなわち図7の(B)に示されるような
丸鋼管1は、冷却床などにおいて自然冷却される。The round steel pipe 1 on which the thickened portion 2 is formed is carried out by making the drum forming roll group 26 into a drive roll or by another feeding means. By the shaping as described above, the outer surface 2a of the thickened portion 2 can have a uniform outer dimension and can be smoothed. The thickened portion 2 is slightly stretched during shaping. In this way, the round steel pipe 1 in which the thickened portion 2 is formed and the outer surface 2a and the inner surface 2b are shaped, that is, the round steel pipe 1 as shown in FIG. 7B is naturally cooled in a cooling floor or the like. It
【0028】そして製品である丸鋼管1を、たとえば支
柱に使用し、その増肉部2に梁材を連結する際に、前述
したように増肉部2の外面2aは、その外形寸法が均一
状でかつ平滑化されていることから、両者間に隙間があ
まり生ぜずまたは均一で小さな隙間となることから、良
好な溶接(連結)を行え、さらに溶接精度や強度を向上
し得る。When the round steel pipe 1 which is a product is used as, for example, a support and a beam is connected to the thickened portion 2, the outer surface 2a of the thickened portion 2 has a uniform outer dimension as described above. Since it is shaped and smoothed, there is not much space between the two or it is a uniform and small space, so that good welding (coupling) can be performed, and welding accuracy and strength can be further improved.
【0029】なお、両クランプ手段15,16間に長手
方向Aの圧縮力が付与され、以て圧縮力により加熱部が
内外へと増肉されて、増肉部2が成形されたのち、送り
装置21の作動によって加熱手段20がクランプ手段1
6側へ所定量送られる際に、図4に示すように、内側へ
の増肉量を規制する大径成形部31も同様に、実線から
仮想線に示すように、クランプ手段16側へ所定量移動
させるように構成してもよい。A compressive force in the longitudinal direction A is applied between the clamp means 15 and 16, so that the heating portion is thickened inward and outward by the compressive force to form the thickened portion 2 and then feed it. The heating means 20 is moved to the clamp means 1 by the operation of the device 21.
When the predetermined amount is fed to the 6 side, as shown in FIG. 4, the large-diameter forming portion 31 that regulates the amount of increase in the thickness of the inner wall is similarly moved to the clamping means 16 side as shown from the solid line to the phantom line. It may be configured to move by a fixed amount.
【0030】次に、本発明の第二の実施の形態を、図8
に基づいて説明する。すなわち、増肉部2に成形ロール
手段25の鼓形成形ロール26群が作用される際に、加
熱状態の増肉部2は、その外面2aが非増肉部、すなわ
ち丸鋼管1の外面1aよりも少し大きな径で整形される
ように構成されている。Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. That is, when the drum-shaped rolls 26 of the forming roll means 25 act on the thickened portion 2, the outer surface 2a of the heated thickened portion 2 is a non-thickened portion, that is, the outer surface 1a of the round steel pipe 1. It is configured to be shaped with a slightly larger diameter.
【0031】この第二の実施の形態によると、図7の
(C)に示されるように、丸鋼管1の外面1aに対して
増肉部2がリング状に突出された丸鋼管1とし得る。次
に、本発明の第三の実施の形態を、図9に基づいて説明
する。According to the second embodiment, as shown in FIG. 7 (C), the round steel pipe 1 can have a thickened portion 2 protruding in a ring shape with respect to the outer surface 1a of the round steel pipe 1. . Next, a third embodiment of the present invention will be described based on FIG.
【0032】すなわち、増肉部2に成形ロール手段25
の鼓形成形ロール26群が作用される前に、加熱状態の
増肉部2は、大径成形部31よりもさらに大径の成形部
35によって、その内面2bが非増肉部、すなわち丸鋼
管1の内面1bと面一状に整形される。そして、その直
後に増肉部2は、その外面2aが鼓形成形ロール26群
によって整形されるように構成されている。That is, the forming roll means 25 is provided in the thickened portion 2.
Before the group of drum-shaped rolls 26 of FIG. It is shaped so as to be flush with the inner surface 1b of the steel pipe 1. Immediately after that, the thickened portion 2 is configured such that the outer surface 2a thereof is shaped by the group of drum-shaped rolls 26.
【0033】この第三の実施の形態によると、図7の
(D)に示されるように、丸鋼管1の外面1a側にのみ
増肉部2がリング状に突出された丸鋼管1とし得る。次
に、本発明の第四の実施の形態を、図10〜図12に基
づいて説明する。According to the third embodiment, as shown in FIG. 7 (D), the round steel pipe 1 can have the thickened portion 2 protruding in a ring shape only on the outer surface 1a side of the round steel pipe 1. . Next, a fourth embodiment of the present invention will be described based on FIGS.
【0034】すなわち、管体の別例として四角状の角鋼
管5が使用され、ここで角鋼管5の厚さ、直径、材質は
前述した丸鋼管1と同様とされている。そして前述と同
様にして増肉部5が成形される。また成形ロール手段2
5Aは、四個(複数個)の平形成形ロール26Aを有
し、これら平形成形ロール26Aは、正方形状の成形面
を形成するように配置され、そしてフレーム27A側の
保持部材28Aに、ロール軸29Aを介して回転自在に
支持されている。That is, a square steel pipe 5 is used as another example of the tubular body, and the thickness, diameter and material of the square steel pipe 5 are the same as those of the round steel pipe 1 described above. Then, the thickened portion 5 is molded in the same manner as described above. Also, the forming roll means 2
5A has four (plural) flat forming rolls 26A, these flat forming rolls 26A are arranged so as to form a square molding surface, and the holding member 28A on the side of the frame 27A, It is rotatably supported via a roll shaft 29A.
【0035】この第四の実施の形態によると、増肉部6
が形成された角鋼管5を搬出させたとき、増肉部6に成
形ロール手段25Aの平形成形ロール26A群が作用さ
れ、以て加熱状態の増肉部6は、その外面6aが非増肉
部、すなわち角鋼管6の外面5aと面一状に整形される
ことになる。これにより図12の(A)に示されるよう
に、増肉部6が成形されかつ外面6aと内面6bとが整
形された角鋼管5とし得る。According to the fourth embodiment, the thickened portion 6
When the square steel pipe 5 on which the is formed is carried out, the flat forming rolls 26A group of the forming roll means 25A act on the thickened portion 6, so that the outer surface 6a of the thickened portion 6 in the heated state is not increased. The meat portion, that is, the outer surface 5a of the square steel pipe 6 is formed to be flush with the outer surface 5a. As a result, as shown in FIG. 12A, it is possible to obtain the square steel pipe 5 in which the thickened portion 6 is formed and the outer surface 6a and the inner surface 6b are shaped.
【0036】なお、角鋼管5に対して、第二の実施の形
態のような整形を行うことで、図12の(B)に示され
るように、外面5aに対して増肉部6が矩形リング状に
突出された角鋼管5とし得る。さらに角鋼管5に対し
て、第三の実施の形態のような整形を行うことで、図1
2の(C)に示されるように、角鋼管5の外面5a側に
のみ増肉部6が矩形リング状に突出された角鋼管5とし
得る。By shaping the square steel pipe 5 as in the second embodiment, as shown in FIG. 12B, the thickened portion 6 is rectangular with respect to the outer surface 5a. It may be a square steel pipe 5 protruding in a ring shape. Further, by shaping the square steel pipe 5 as in the third embodiment, as shown in FIG.
As shown in (C) of 2, the square steel pipe 5 may have a thickened portion 6 protruding in a rectangular ring shape only on the outer surface 5a side of the square steel pipe 5.
【0037】上記した第一の実施の形態では、加熱手段
20により局部加熱が行われたのち、両クランプ手段1
5,16により長手方向Aの圧縮力が付与されることで
増肉部2を成形しているが、これは圧縮力が付与された
状態で加熱手段20により局部加熱が行われる方式であ
ってもよい。In the first embodiment described above, after the local heating is performed by the heating means 20, both clamping means 1 are carried out.
The thickened portion 2 is formed by applying a compressive force in the longitudinal direction A by 5, 16 and this is a system in which the heating means 20 performs local heating while the compressive force is applied. Good.
【0038】上記した各実施の形態では、成形ロール手
段25,25Aに対して管体を移動させることで整形を
行っているが、これは管体に対して成形ロール手段2
5,25Aを移動させることで整形を行ってもよい。In each of the above-described embodiments, shaping is performed by moving the tube body with respect to the forming roll means 25, 25A.
The shaping may be performed by moving 5, 25A.
【0039】上記した第一の実施の形態では、両クラン
プ手段15,16ともに接近動させることで圧縮力が付
与されているが、これは片方のみ移動させる形式であつ
てもよい。In the above-described first embodiment, the compressing force is applied by moving both clamp means 15 and 16 close to each other, but this may be a type in which only one is moved.
【0040】上記した各実施の形態では、両クランプ手
段15,16により増肉部2を成形した直後に、成形ロ
ール手段25,25Aにより整形を行っているが、これ
は増肉工程部分とは別な整形工程部分に移して整形を行
ってもよく、その際に増肉部2は、必要に応じて再加熱
される。In each of the above-mentioned embodiments, the shaping roll means 25, 25A is used to perform shaping immediately after the thickening portion 2 is shaped by the clamping means 15, 16, but this is not the thickening step portion. It may move to another shaping process part and may shape, and the thickening part 2 is reheated as needed at that time.
【0041】上記した各実施の形態では、丸鋼管1や角
鋼管5に増肉部2,6を成形しているが、これは、たと
えば増肉部2を成形した丸鋼管1を、加熱炉などにより
全体可及的に均一に加熱させ、そして熱間成形により角
形に成形することで、増肉部6を有する角鋼管5とし得
る。さらにこの場合には、増肉部2のみでなく全体を加
熱することで、鋼材の残留応力、材質の劣化を回復し得
るとともに、鋼材料の熱による残留歪を解消し得る。In each of the above-mentioned embodiments, the thickened portions 2 and 6 are formed on the round steel pipe 1 and the square steel pipe 5. For example, the round steel pipe 1 formed by forming the thickened portion 2 is heated in a heating furnace. For example, the square steel pipe 5 having the thickened portion 6 can be obtained by heating the whole uniformly as much as possible by the above-mentioned method and then forming it into a rectangular shape by hot forming. Further, in this case, by heating not only the thickened portion 2 but the whole, residual stress of the steel material and deterioration of the material can be recovered, and residual strain due to heat of the steel material can be eliminated.
【0042】上記した各実施の形態において、増肉部
2,6の長手方向Aにおける長さは任意に設定されるも
のであり、また増肉部2,6は、一箇所または複数箇所
に形成されるものである。In each of the above-described embodiments, the length of the thickened portions 2 and 6 in the longitudinal direction A is arbitrarily set, and the thickened portions 2 and 6 are formed at one place or a plurality of places. It is what is done.
【0043】[0043]
【発明の効果】上記した本発明の請求項1によると、加
熱状態の増肉部の外面と内面とを整形することにより、
増肉部の外面は、その外形寸法を均一状にできるととも
に、増肉部の外面と内面とを平滑化できる。したがっ
て、たとえば整形後の管体を支柱に使用し、その増肉部
に梁材を連結する際に、その外形寸法が均一状でかつ平
滑化されている増肉部の外面と梁材との間には隙間があ
まり生ぜずまたは均一で小さな隙間となることから、良
好な溶接(連結)を行うことができ、さらに溶接精度や
強度を向上できる。According to claim 1 of the present invention described above, by shaping the outer surface and the inner surface of the thickened portion in the heated state,
The outer surface of the thickened portion can have a uniform outer dimension, and the outer surface and the inner surface of the thickened portion can be smoothed. Therefore, for example, when the post-shaped pipe is used as a column and the beam member is connected to the thickened portion, the outer surface of the thickened portion and the beam member whose outer dimensions are uniform and smoothed Since there is not much space between them or they are uniform and small, good welding (coupling) can be performed, and welding accuracy and strength can be further improved.
【0044】また上記した本発明の請求項2によると、
増肉部を形成した管体の外面は、突出部材のないすっき
りした状態にでき、これにより、管体を、奇麗に仕上げ
ることができるとともに、取り扱い容易にできる。According to claim 2 of the present invention described above,
The outer surface of the tube body having the increased-thickness portion can be in a clean state without the protruding member, whereby the tube body can be finished neatly and can be easily handled.
【0045】そして上記した本発明の請求項3による
と、増肉部を形成した管体の内面は、突出しないすっき
りした状態にできる。さらに上記した本発明の請求項4
によると、管体の目的とする箇所の両側をクランプ手段
によりクランプし、そして目的とする箇所を加熱手段に
より加熱したのち、クランプ手段を相対的に接近移動さ
せて管体に長手方向の圧縮力を付与することで、目的と
する箇所に増肉部を形成できる。このように増肉した後
に、管体と、外面整形用の成形ロール手段ならびに内面
整形用の成形部とを、管体の長手方向に相対的に移動さ
せることで、成形ロール手段により、加熱状態の増肉部
の外面を整形できるとともに、成形部により増肉部の内
面を整形できる。その際に圧縮力を、加熱部の近くに位
置している両クランプ手段により掛けることから、この
加熱部に充分な圧縮力を均一に掛けることができ、以て
好適な厚肉部の形成を行うことができ、さらに管体の非
加熱部が変形される恐れもない。According to the third aspect of the present invention described above, the inner surface of the tubular body having the increased-thickness portion can be in a clean state so as not to project. Further, claim 4 of the present invention described above.
According to the method, the both sides of the target portion of the pipe body are clamped by the clamp means, and the target portion is heated by the heating means, and then the clamp means is moved relatively close to each other to compress the pipe body in the longitudinal direction. By adding the, it is possible to form a thickened portion at a desired location. After increasing the wall thickness in this way, the tubular body , the forming roll means for shaping the outer surface, and the inner surface
And a molding portion for shaping, by relatively moving in the longitudinal direction of the tube, the forming roll unit, it is possible to shape the outer surface of the thickened portion of the heated state, of the thickened portion by the molding section
You can shape the surface . At that time, since the compressive force is applied by both clamp means located near the heating part, it is possible to uniformly apply a sufficient compressive force to the heating part, thereby forming a suitable thick part. This can be done and there is no risk of the non-heated part of the tube being deformed.
【図1】本発明の第一の実施の形態を示し、管体の部分
増肉設備における増肉作用時の側面図である。FIG. 1 shows a first embodiment of the present invention and is a side view of a tubular body at a partial thickness increasing facility during a thickness increasing operation.
【図2】同管体の部分増肉設備における管体搬入時の側
面図である。FIG. 2 is a side view at the time of carrying in the pipe body in the partial thickness increase equipment for the pipe body.
【図3】同管体の部分増肉設備における増肉作用時の要
部の縦断側面図である。FIG. 3 is a vertical cross-sectional side view of a main part of the tubular body at the time of a thickness increasing operation in a partial thickness increasing facility.
【図4】同管体の部分増肉設備における増肉作用時の変
形例を示す要部の縦断側面図である。FIG. 4 is a vertical cross-sectional side view of an essential part showing a modified example at the time of a thickness increasing operation in the partial thickness increasing equipment of the tubular body.
【図5】同管体の部分増肉設備における成形ロール手段
部分の正面図である。FIG. 5 is a front view of a forming roll means portion in the partial thickness increasing equipment for the tubular body.
【図6】同管体の部分増肉設備における成形ロール手段
部分の縦断側面図である。FIG. 6 is a vertical cross-sectional side view of a forming roll means portion in the partial thickness increasing equipment for the tubular body.
【図7】同各種の丸鋼管を示す一部切り欠き斜視図であ
る。FIG. 7 is a partially cutaway perspective view showing the various round steel pipes.
【図8】本発明の第二の実施の形態を示し、管体の部分
増肉設備における成形ロール手段部分の縦断側面図であ
る。FIG. 8 shows a second embodiment of the present invention and is a vertical cross-sectional side view of a forming roll means portion in a partial thickness increasing equipment for a pipe body.
【図9】本発明の第三の実施の形態を示し、管体の部分
増肉設備における成形ロール手段部分の縦断側面図であ
る。FIG. 9 shows a third embodiment of the present invention and is a vertical cross-sectional side view of a forming roll means portion in a partial thickness increasing equipment for a pipe body.
【図10】本発明の第四の実施の形態を示し、管体の部
分増肉設備における成形ロール手段部分の正面図であ
る。FIG. 10 shows a fourth embodiment of the present invention and is a front view of a forming roll means portion in a partial thickness increasing equipment for a pipe body.
【図11】同管体の部分増肉設備における成形ロール手
段部分の縦断側面図である。FIG. 11 is a vertical cross-sectional side view of a forming roll means portion in the partial thickness increase equipment for the tubular body.
【図12】同各種の角鋼管を示す一部切り欠き斜視図で
ある。FIG. 12 is a partially cutaway perspective view showing the various square steel pipes.
1 丸鋼管(管体) 1a 外面 1b 内面 2 増肉部 2a 外面 2b 内面 5 角鋼管(管体) 5a 外面 6 増肉部 6a 外面 6b 内面 10 部分増肉設備 11 支持手段 15 クランプ手段 16 クランプ手段 20 加熱手段 21 送り装置 25 成形ロール手段 26 鼓形成形ロール 25A 成形ロール手段 26A 平形成形ロール 30 管内面成形手段 31 大径成形部 32 小径成形部 35 成形部 A 長手方向 B 増肉箇所 1 Round steel pipe (tube) 1a exterior 1b inner surface 2 thickening part 2a exterior 2b inside 5 square steel pipe (tube) 5a exterior 6 thickening part 6a exterior 6b inner surface 10 Partial thickening equipment 11 Supporting means 15 Clamping means 16 Clamping means 20 Heating means 21 Feeder 25 Forming roll means 26 Drum-forming Roll 25A forming roll means 26A Flat Form Roll 30 Pipe inner surface forming means 31 Large diameter forming part 32 Small diameter forming part 35 Molding Department A longitudinal direction B thickened part
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Claims (4)
この管体に長手方向の圧縮力を付与して、目的とする箇
所に増肉部を形成し、増肉した後に、管体と、外面整形
用の成形ロール手段ならびに内面整形用の成形部とを、
管体の長手方向に相対的に移動させて、成形ロール手段
により、加熱状態の増肉部の外面を整形するとともに、
成形ロール手段に対向された成形部により、加熱状態の
増肉部の内面を整形することを特徴とする管体の部分増
肉方法。1. After heating a target portion of the tubular body,
By applying compressive force in the longitudinal direction to this pipe, a thickened portion is formed at the desired location, and after thickening the pipe and outer surface
A molding roll means for molding and a molding part for shaping the inner surface ,
By relatively moving in the longitudinal direction of the tubular body and shaping the outer surface of the thickened portion in the heated state by the forming roll means ,
By the forming part facing the forming roll means,
A method of partially increasing the thickness of a pipe body, which comprises shaping the inner surface of the increased thickness portion .
状に整形することを特徴とする請求項1記載の管体の部
分増肉方法。2. The method of partially increasing the thickness of a tubular member according to claim 1, wherein the outer surface of the thickened portion is shaped flush with the outer surface of the non-thickened portion.
状に整形することを特徴とする請求項1記載の管体の部
分増肉方法。3. The method for partially increasing the thickness of a tubular body according to claim 1, wherein the inner surface of the thickened portion is shaped flush with the inner surface of the non-thickened portion.
の長手方向の二箇所を保持自在な一対のクランプ手段が
設けられ、これらクランプ手段は相対的に接近離間移動
自在に構成され、管体の目的とする箇所を加熱させる加
熱手段が設けられ、部分増肉を行った管体に対して、こ
の管体の長手方向に相対的に移動させることで、加熱状
態の増肉部の外面を整形する成形ロール手段と内面を整
形する成形部とが対向して設けられていることを特徴と
する管体の部分増肉設備。4. A pair of clamp means is provided which is capable of holding two locations in the longitudinal direction of the tubular body, with the intended location of the tubular body being inside, and these clamp means are relatively movable toward and away from each other. The heating means for heating the target portion of the pipe body is provided, and by moving the pipe body having undergone the partial thickness increase in the longitudinal direction of the pipe body, the thickness increase of the heated state is increased. Forming roll means for shaping the outer surface and the inner surface
A partial thickness increasing equipment for a pipe body, which is provided so as to face a shaping portion to be shaped .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23876197A JP3522089B2 (en) | 1997-09-04 | 1997-09-04 | Method of Partial Wall Thickening of Tube and Partial Wall Thickening Equipment of Tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23876197A JP3522089B2 (en) | 1997-09-04 | 1997-09-04 | Method of Partial Wall Thickening of Tube and Partial Wall Thickening Equipment of Tube |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002002883A Division JP3708053B2 (en) | 2002-01-10 | 2002-01-10 | Square steel pipe manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1177151A JPH1177151A (en) | 1999-03-23 |
JP3522089B2 true JP3522089B2 (en) | 2004-04-26 |
Family
ID=17034880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23876197A Expired - Fee Related JP3522089B2 (en) | 1997-09-04 | 1997-09-04 | Method of Partial Wall Thickening of Tube and Partial Wall Thickening Equipment of Tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3522089B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102581016B (en) * | 2011-01-06 | 2014-03-05 | 山东特种工业集团有限公司 | Machining method for locally thickening steel pipe |
CN103736733B (en) * | 2013-12-26 | 2015-06-10 | 马鞍山市安工大工业技术研究院有限公司 | Push cross-rolling device and method for thickening steel pipe partly |
-
1997
- 1997-09-04 JP JP23876197A patent/JP3522089B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH1177151A (en) | 1999-03-23 |
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