JP2013091912A - Method and device for repairing weld zone of steel plate deck - Google Patents

Method and device for repairing weld zone of steel plate deck Download PDF

Info

Publication number
JP2013091912A
JP2013091912A JP2011232890A JP2011232890A JP2013091912A JP 2013091912 A JP2013091912 A JP 2013091912A JP 2011232890 A JP2011232890 A JP 2011232890A JP 2011232890 A JP2011232890 A JP 2011232890A JP 2013091912 A JP2013091912 A JP 2013091912A
Authority
JP
Japan
Prior art keywords
closed cross
section rib
welded
deck
repair
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.)
Pending
Application number
JP2011232890A
Other languages
Japanese (ja)
Inventor
Takuyo Konishi
拓洋 小西
Yoshihito Konishi
由人 小西
Yuzuru Mitake
譲 御嶽
Hiroshi Matsumura
▲廣▼ 松村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metropolitan Expressway Co Ltd
Highway Technology Research Center
Shutoko Maintenance East Tokyo Co Ltd
Original Assignee
Metropolitan Expressway Co Ltd
Highway Technology Research Center
Shutoko Maintenance East Tokyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metropolitan Expressway Co Ltd, Highway Technology Research Center, Shutoko Maintenance East Tokyo Co Ltd filed Critical Metropolitan Expressway Co Ltd
Priority to JP2011232890A priority Critical patent/JP2013091912A/en
Publication of JP2013091912A publication Critical patent/JP2013091912A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for repairing a weld zone of a steel plate deck, which dispense with long time and high costs.SOLUTION: In a method for repairing a weld zone 4 of a steel plate deck 1, a deck plate 2 and a closed-section rib 3 are subjected to one-side welding from only the outside 3a of the closed-section rib 3. Characteristically, the welded zone 4 and a peripheral part thereof are repaired by being melted by TIG (tungsten inert gas) from the inside 3b of the closed-section rib.

Description

本発明は、橋梁や高架道路を構成する鋼床版の補修方法及び補修装置に関する。詳細に言えば、デッキプレート（床板）と閉断面リブとからなる鋼床版において、デッキプレートと閉断面リブとの溶接部及びその周辺部を、溶融によって補修する方法及び装置に関する。更に詳細に言えば、補修予定の鋼床版は、デッキプレートと閉断面リブとが閉断面リブの外側からのみ片側溶接されているものに限定される。   The present invention relates to a repair method and a repair device for a steel deck that constitutes a bridge or an elevated road. More specifically, the present invention relates to a method and apparatus for repairing a welded portion between a deck plate and a closed cross-section rib and a peripheral portion thereof by melting in a steel deck slab composed of a deck plate (floor plate) and a closed cross-section rib. More specifically, the steel slab to be repaired is limited to one in which the deck plate and the closed cross-section rib are welded on one side only from the outside of the closed cross-section rib.

従来より、橋梁の床版構造の一つとして、デッキプレートと、これを補剛する閉断面リブとからなる鋼床版が使用されている。図３は、鋼床版を使用した道路橋Ｂの一部を示すものである。道路橋Ｂは、鋼床版の下方に主桁や横桁や横リブ等を一体に備えるとともに、鋼床版の上方に舗装Ｐや高欄を一体に備えて構成されている。図４は、このような鋼床版１の基本的な構造を示したものであって、本図において、２はデッキプレート、３は閉断面リブ、４はデッキプレート２と閉断面リブ３との溶接部を示している。また、図６は、図４の溶接部４付近の拡大図である。   Conventionally, as one of the slab structures of a bridge, a steel slab comprising a deck plate and a closed cross-section rib that stiffens the deck plate has been used. FIG. 3 shows a part of a road bridge B using a steel deck. The road bridge B includes a main girder, a cross girder, a horizontal rib, and the like that are integrally provided below the steel deck, and a pavement P and a rail that are integrally provided above the steel deck. FIG. 4 shows the basic structure of such a steel slab 1. In this figure, 2 is a deck plate, 3 is a closed cross-section rib, 4 is a deck plate 2 and a closed cross-section rib 3. The welding part is shown. FIG. 6 is an enlarged view of the vicinity of the weld 4 in FIG.

デッキプレート２と閉断面リブ３との溶接は、デッキプレート２と閉断面リブとが閉断面リブの外側３ａからのみ片側溶接されている。すなわち、閉断面リブの内側３ｂからは溶接されていない。これは、溶接の容易さに起因しており、閉断面リブの内側３ｂからの溶接は人による溶接が困難なためである。そして、閉断面リブ３の内側の溶接ルート部４ａにはデッキプレート２と閉断面リブ３の端面３ｃとの間の空隙５が形成された未溶着部が存在している。この空隙５は構造部材の切り欠き効果をもたらし、鋼床版１の応力集中部を形成するとともに溶接欠陥も生じやすくなり、以下に述べる溶接部亀裂の要因となる。なお、本明細書において、「溶接ルート部」とは、溶接開始箇所より奥の場所を言う。   In the welding of the deck plate 2 and the closed cross-section rib 3, the deck plate 2 and the closed cross-section rib are welded on one side only from the outer side 3a of the closed cross-section rib. That is, it is not welded from the inner side 3b of the closed cross-section rib. This is due to the ease of welding, and welding from the inside 3b of the closed cross-section rib is difficult for humans to weld. An unwelded portion in which a gap 5 between the deck plate 2 and the end surface 3 c of the closed cross-section rib 3 is formed is present in the weld route portion 4 a inside the closed cross-section rib 3. This void 5 brings about a notch effect of the structural member, forms a stress concentration portion of the steel deck 1 and easily causes welding defects, and causes the weld crack described below. In the present specification, the “welding root portion” refers to a location far behind the welding start location.

このような鋼床版１は、施工から相当の年数が経過すると、図６に示すように、溶接部４において、亀裂Ｃが、閉断面リブ３の長手方向（図６の紙面を垂直に貫通する方向）に沿って発生する場合がある。このような亀裂Ｃを放置しておくと、溶接部４が分断されて、閉断面リブ３がデッキプレート２から脱離し、鋼床版１全体の強度が低下してしまうという問題がある。   When a considerable number of years have elapsed from the construction of such a steel slab 1, as shown in FIG. 6, the crack C penetrates the longitudinal direction of the closed cross-section rib 3 (perpendicularly through the paper surface of FIG. 6). May occur along the direction of If such a crack C is left unattended, there is a problem that the welded portion 4 is divided, the closed cross-section rib 3 is detached from the deck plate 2, and the strength of the entire steel deck 1 is lowered.

また、溶接部４において、亀裂Ｄが発生することもある。亀裂Ｄがデッキプレート２の舗装Ｐ側にまで達し、鋼床版１の崩壊を招いてしまうおそれもある。そのため、このような鋼床版１においては、亀裂Ｃ、Ｄの拡大を防止し、鋼床版１の強度を確保するための措置を採ることが必要とされている。   In addition, a crack D may occur in the welded portion 4. There is a possibility that the crack D reaches the pavement P side of the deck plate 2 and causes the steel deck 1 to collapse. Therefore, in such a steel slab 1, it is necessary to take measures to prevent the cracks C and D from expanding and to ensure the strength of the steel slab 1.

この措置として提案された補修方法として、特許文献１に記載された方法があり、これは図７に示すものである。すなわち、補修予定部Ｒと、補修予定部Ｒに隣接している閉断面リブの側壁３ｓとを除去することによって、補修予定部Ｒに隣接している部分のデッキプレート２と、補修予定部Ｒに隣接している部分の側壁３ｓとの間に、開先部Ｅを形成してから、溶接用の裏当て材７を、開先部Ｅに側壁３ｓの内側（図中左側）から固定した後、開先部Ｅを、側壁３ｓの外側（図中右側）から溶接する。   As a repair method proposed as this measure, there is a method described in Patent Document 1, which is shown in FIG. That is, by removing the repair planned portion R and the side wall 3s of the closed cross-section rib adjacent to the repair planned portion R, the portion of the deck plate 2 adjacent to the planned repair portion R and the planned repair portion R After forming the groove E between the side wall 3s adjacent to the groove, the welding backing material 7 was fixed to the groove E from the inside of the side wall 3s (left side in the figure). Then, the groove part E is welded from the outside (right side in the figure) of the side wall 3s.

この補修方法は、閉断面リブの外側において開先部を形成し、そこを溶接するようにしているので、デッキプレートと閉断面リブとの間に、未溶着部のない溶接を行うことができる。そのため、鋼床版において充分な強度を確保して、接合部を補修することができる。そして、この補修方法は、開先部を形成する際に、デッキプレートと閉断面リブとの間の接合部を除去するので、当該補修方法の実施時において、デッキプレートの裏面を観察することができる。そのため、デッキプレートにまで亀裂が達している場合に、当該亀裂の発見及び状況の確認を行うことも可能であるとしている。   In this repair method, since the groove portion is formed outside the closed cross-section rib and welded there, welding without an unwelded portion can be performed between the deck plate and the closed cross-section rib. . Therefore, sufficient strength can be secured in the steel deck and the joint can be repaired. And, since this repair method removes the joint between the deck plate and the closed cross-section rib when forming the groove portion, the back surface of the deck plate can be observed when the repair method is performed. it can. Therefore, when the crack reaches the deck plate, it is also possible to find the crack and confirm the situation.

しかしながら、この補修方法は、現場において補修予定部Ｒと、補修予定部Ｒに隣接している閉断面リブの側壁３ｓとを除去すること、溶接用の裏当て材７を閉断面リブ内側から固定すること、補強部材を除去しなかった閉断面リブへ固定すること等が必要となるため、工事に要する時間が掛かり通行止めや車線規制等を行う必要があり、工事自体の費用も大きい。   However, this repair method removes the planned repair portion R and the side wall 3s of the closed cross-section rib adjacent to the planned repair portion R, and fixes the backing material 7 for welding from the inside of the closed cross-section rib. Therefore, it is necessary to fix the reinforcing member to the closed cross-section rib from which the reinforcing member has not been removed. Therefore, it takes time for the construction, and it is necessary to perform traffic blocking, lane regulation, etc., and the cost of the construction itself is high.

特開２００７−１９７９６２号公報JP 2007-199962 A

本発明は、上記問題に鑑みてなされたものであり、その目的は、時間及びコストが掛からない鋼床版の溶接部の補修方法及び補修装置を提供することである。   This invention is made | formed in view of the said problem, The objective is to provide the repair method and repair apparatus of the welding part of the steel deck which do not require time and cost.

請求項１に記載の発明によれば、鋼床版の溶接部の補修方法は、
デッキプレート（２）と閉断面リブ（３）とが該閉断面リブ（３）の外側（３ａ）からのみ片側溶接されている鋼床版（１）の溶接部（４）の補修方法であって、
前記溶接部（４）及びその周辺部を、前記閉断面リブの内側（３ｂ）からＴＩＧにより溶融して補修することを特徴とする。
単に、閉断面リブの内側（３ｂ）からＴＩＧにより溶接部及びその周辺部を溶融することにより、溶接部を補修することが可能となる。これにより、時間及びコストが掛からない鋼床版の溶接部の補修方法を提供することが可能となる。 According to invention of Claim 1, the repair method of the welding part of a steel deck is as follows.
This is a repair method for the welded portion (4) of the steel deck (1) in which the deck plate (2) and the closed cross-section rib (3) are welded only on one side only from the outside (3a) of the closed cross-section rib (3). And
The welded portion (4) and its peripheral portion are repaired by melting them with TIG from the inside (3b) of the closed cross-section rib.
It is possible to repair the welded part simply by melting the welded part and its peripheral part by TIG from the inside (3b) of the closed cross-section rib. Thereby, it becomes possible to provide the repair method of the welding part of the steel deck which does not take time and cost.

請求項２に記載の発明によれば、鋼床版の溶接部の補修方法は、補修される前記溶接部（４）の溶接ルート部（４ａ）には前記デッキプレート（２）と前記閉断面リブ（３）の端面（３ｃ）との間の空隙（５）が形成された未溶着部が存在しており、
前記溶接部（４）及びその周辺部の溶融により前記溶接部（４）及びその周辺部が前記空隙（５）内に進入して前記溶接ルート部（４ａ）に溶着部（６）を形成することを特徴とする。
補修対象となる鋼床版の溶接部及びその周辺部を限定し、更に、溶融による溶接部及びその周辺部の補修前後の形態を明確にしたものである。溶接ルート部近傍に存在する空隙が無くなるため、応力集中部が無くなり、疲労強度が向上する。 According to the second aspect of the present invention, in the repair method of the welded portion of the steel deck, the weld plate (4a) of the welded portion (4) to be repaired includes the deck plate (2) and the closed cross section. There is an unwelded portion in which a gap (5) between the end surface (3c) of the rib (3) is formed,
The welded part (4) and its peripheral part enter the gap (5) by melting the welded part (4) and its peripheral part to form a welded part (6) in the weld root part (4a). It is characterized by that.
The welded portion of the steel slab to be repaired and its peripheral part are limited, and further, the welded part by melting and the form before and after repairing the peripheral part are clarified. Since there are no voids in the vicinity of the weld root portion, there is no stress concentration portion, and the fatigue strength is improved.

請求項３に記載の発明によれば、鋼床版の溶接部の補修装置は、デッキプレート（２）と閉断面リブ（３）とが閉断面リブの外側（３ａ）からのみ片側溶接されている鋼床版（１）の溶接部（４）の補修装置（１０）であって、請求項１又は２に記載の鋼床版の溶接部（４）の補修方法を実行可能なＴＩＧ溶融手段（９）を搭載し、前記閉断面リブ内を走行することを特徴とする。
閉断面リブの内側（３ｂ）からＴＩＧにより溶融することにより溶接部を補修する装置を記載したものである。 According to the invention described in claim 3, in the repair device for the welded portion of the steel deck, the deck plate (2) and the closed cross-section rib (3) are welded only on one side only from the outside (3a) of the closed cross-section rib. A repair device (10) for a welded portion (4) of a steel floor slab (1), wherein the TIG melting means is capable of executing the repair method for the welded portion (4) of a steel floor slab according to claim 1 or 2. (9) is mounted and travels in the closed cross-section rib.
The apparatus which repairs a welding part by melting by TIG from the inner side (3b) of a closed cross-section rib is described.

本発明に係る補修方法を説明するための溶接補修部の断面図である。It is sectional drawing of the welding repair part for demonstrating the repair method which concerns on this invention. （ａ）は本発明に係る補修装置の正面図であり、（ｂ）は本発明に係る補修装置の側面図である。(A) is a front view of the repair apparatus which concerns on this invention, (b) is a side view of the repair apparatus which concerns on this invention. 道路橋の斜視図である。It is a perspective view of a road bridge. 鋼床版の断面図である。It is sectional drawing of a steel deck. 本発明に係る補修方法を実施しようとする鋼床版の一部を示したものである。The one part of the steel deck which is going to implement the repair method which concerns on this invention is shown. 図４の溶接部付近であるＡ部の拡大図である。It is an enlarged view of the A section which is the welding part vicinity of FIG. 従来の補修方法を説明する図である。It is a figure explaining the conventional repair method.

以下、本発明の実施の形態を図面に基づいて説明する。図５は、本発明に係る補修方法を実施しようとする鋼床版１の一部を示したものである。図５において、２はデッキプレート、３は閉断面リブ、４はデッキプレート２と閉断面リブ３との溶接部、また、Ｒは補修予定部（溶接部４のうち、亀裂等のある補修しようとする部分）を示している。デッキプレート２と閉断面リブ３との溶接は、デッキプレート２と閉断面リブとが閉断面リブの外側３ａからのみ溶接されている。すなわち、閉断面リブの内側３ｂからは溶接されていない（図６参照）。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 shows a part of the steel slab 1 to be repaired according to the present invention. In FIG. 5, 2 is a deck plate, 3 is a closed cross-section rib, 4 is a welded portion between the deck plate 2 and the closed cross-section rib 3, and R is a repair planned portion (of the welded portion 4, repair with a crack etc. Part). In the welding of the deck plate 2 and the closed cross-section rib 3, the deck plate 2 and the closed cross-section rib are welded only from the outer side 3a of the closed cross-section rib. That is, it is not welded from the inner side 3b of the closed cross-section rib (see FIG. 6).

一方、本発明に係る補修方法を実施するための装置１０を図２に表す。補修装置１０はＴＩＧトーチ（ＴＩＧ溶融手段）９と台車１１と走行用モータ１２とを備える。補修装置１０の全長は３８０ｍｍであり全高は２４０ｍｍであり全幅が２００ｍｍである。補修装置１０はＴＩＧトーチ９をＹ方向に自在に移動すること及びθ方向に自在に回転することが可能であり、閉断面リブ３内をＸ方向（長手方向）に自在に走行することが可能である。   On the other hand, an apparatus 10 for carrying out the repair method according to the present invention is shown in FIG. The repair device 10 includes a TIG torch (TIG melting means) 9, a carriage 11, and a traveling motor 12. The total length of the repair device 10 is 380 mm, the total height is 240 mm, and the total width is 200 mm. The repair device 10 can freely move the TIG torch 9 in the Y direction and can rotate freely in the θ direction, and can freely travel in the X direction (longitudinal direction) in the closed cross-section rib 3. It is.

次に本発明に係る補修方法を図１に基づいて説明する。補修する前の鋼床版１の溶接部４の状態は、図６に表されている。まず、補修されるべき溶接部４に対して、閉断面リブ３の内側３ｂから活性フラックス剤を吹き付ける。これは、補修装置１０に搭載された吹き付け手段により実行される。そして、図１に示すように、補修されるべき溶接部４に対して、閉断面リブ３の内側３ｂからＴＩＧトーチの電極９ａを近づける。電極９ａを所定の位置に設定すれば、トーチ９からイナートガスを噴射しながらタングステン電極９ａと鋼床版１との間に大電流を流して溶接部４の溶接ルート部４ａ近傍を溶融（再溶融）させる。そうすると、溶接部４及びその周辺部の溶融により、溶接部４及びその周辺部が、デッキプレート２と閉断面リブ３の端面３ｃとの間の空隙５内に進入して溶接ルート部４ａに溶着部６を形成する。
そして、溶接ルート部４ａ近傍を上記のように溶融させながら、補修装置１０をＸ方向に所定速度で走行させる。 Next, a repair method according to the present invention will be described with reference to FIG. The state of the welded portion 4 of the steel deck 1 before repair is shown in FIG. First, an active flux agent is sprayed from the inner side 3b of the closed cross-section rib 3 to the welded portion 4 to be repaired. This is executed by the spraying means mounted on the repair device 10. Then, as shown in FIG. 1, the electrode 9 a of the TIG torch is brought closer to the welded portion 4 to be repaired from the inner side 3 b of the closed cross-section rib 3. If the electrode 9a is set at a predetermined position, a large current is passed between the tungsten electrode 9a and the steel deck 1 while injecting an inert gas from the torch 9 to melt (remelt) the vicinity of the weld root 4a of the weld 4 ) Then, due to melting of the welded portion 4 and its peripheral portion, the welded portion 4 and its peripheral portion enter the gap 5 between the deck plate 2 and the end surface 3c of the closed cross-section rib 3 and are welded to the weld route portion 4a. Part 6 is formed.
And the repair apparatus 10 is made to drive | work at a predetermined speed to a X direction, fuse | melting the welding route part 4a vicinity as mentioned above.

以上のように、時間及びコストが掛からない鋼床版の溶接部の補修方法及び補修装置を提供することが可能となる。   As described above, it is possible to provide a repair method and a repair device for a welded portion of a steel deck that does not require time and cost.

１ 鋼床版
２ デッキプレート
３ 閉断面リブ
４ 溶接部
５ 空隙
６ 溶着部
１０ 補修装置 DESCRIPTION OF SYMBOLS 1 Steel floor slab 2 Deck plate 3 Closed cross-section rib 4 Welding part 5 Cavity 6 Welding part 10 Repair apparatus

Claims (3)

デッキプレート（２）と閉断面リブ（３）とが該閉断面リブ（３）の外側（３ａ）からのみ片側溶接されている鋼床版（１）の溶接部（４）の補修方法であって、
前記溶接部（４）及びその周辺部を、前記閉断面リブ（３）の内側（３ｂ）からＴＩＧにより溶融して補修することを特徴とする、鋼床版の溶接部の補修方法。 This is a repair method for the welded portion (4) of the steel deck (1) in which the deck plate (2) and the closed cross-section rib (3) are welded only on one side only from the outside (3a) of the closed cross-section rib (3). And
The method for repairing a welded portion of a steel slab, wherein the welded portion (4) and its peripheral portion are repaired by melting with TIG from the inside (3b) of the closed cross-section rib (3). 補修される前記溶接部（４）の溶接ルート部（４ａ）には前記デッキプレート（２）と前記閉断面リブ（３）の端面（３ｃ）との間の空隙（５）が形成された未溶着部が存在しており、
前記溶接部（４）及びその周辺部の溶融により前記溶接部（４）及びその周辺部が前記空隙（５）内に進入して前記溶接ルート部（４ａ）に溶着部（６）を形成することを特徴とする、請求項１に記載の鋼床版の溶接部の補修方法。 A gap (5) between the deck plate (2) and the end surface (3c) of the closed cross-section rib (3) is not formed in the weld route portion (4a) of the welded portion (4) to be repaired. There are welds,
The welded part (4) and its peripheral part enter the gap (5) by melting the welded part (4) and its peripheral part to form a welded part (6) in the weld root part (4a). The method for repairing a welded portion of a steel deck according to claim 1, wherein: デッキプレート（２）と閉断面リブ（３）とが閉断面リブの外側（３ａ）からのみ片側溶接されている鋼床版（１）の溶接部（４）の補修装置（１０）であって、
請求項１又は２に記載の鋼床版の溶接部（４）の補修方法を実行可能なＴＩＧ溶融手段（９）を搭載し、前記閉断面リブ（３）内を走行することを特徴とする、鋼床版の溶接部の補修装置（１０）。 A repair device (10) for a welded portion (4) of a steel deck (1) in which a deck plate (2) and a closed cross-section rib (3) are welded only on one side only from the outside (3a) of the closed cross-section rib ,
A TIG melting means (9) capable of executing the repair method of the welded portion (4) of the steel deck according to claim 1 or 2 is mounted and travels in the closed cross-section rib (3). , Repair equipment (10) for welds of steel slabs.
JP2011232890A 2011-10-24 2011-10-24 Method and device for repairing weld zone of steel plate deck Pending JP2013091912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011232890A JP2013091912A (en) 2011-10-24 2011-10-24 Method and device for repairing weld zone of steel plate deck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011232890A JP2013091912A (en) 2011-10-24 2011-10-24 Method and device for repairing weld zone of steel plate deck

Publications (1)

Publication Number Publication Date
JP2013091912A true JP2013091912A (en) 2013-05-16

Family

ID=48615256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011232890A Pending JP2013091912A (en) 2011-10-24 2011-10-24 Method and device for repairing weld zone of steel plate deck

Country Status (1)

Country Link
JP (1) JP2013091912A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018017556A (en) * 2016-07-26 2018-02-01 プレス工業株式会社 Crack detection system for dead axle case
CN109024223A (en) * 2018-08-16 2018-12-18 武汉锂鑫自动化科技有限公司 The method and steel box-girder of U ribs of steel box girder and panel junction supplement inside weld
JP2019052432A (en) * 2017-09-13 2019-04-04 新日鐵住金株式会社 Controller for pressing device to be used in steel plate floor, pressing device comprising controller, and control method for pressing device
JP2021030235A (en) * 2019-08-14 2021-03-01 日本製鉄株式会社 Welded structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06335773A (en) * 1993-05-26 1994-12-06 Nippon Steel Weld Prod & Eng Co Ltd Method and device for profiling groove
JPH11216566A (en) * 1998-01-29 1999-08-10 Kawasaki Heavy Ind Ltd Automatic welding device for inner face of box girder
JP2005254250A (en) * 2004-03-09 2005-09-22 Nippon Steel & Sumikin Welding Co Ltd Copying welding device
JP2007197962A (en) * 2006-01-25 2007-08-09 Kawada Industries Inc Repairing method of joining part of deck plate and closed cross-sectional rib
WO2008015727A1 (en) * 2006-07-31 2008-02-07 Ihi Corporation Rigidity reinforcement plate and method of producing rigidity reinforcement plate
JP2012016710A (en) * 2010-07-06 2012-01-26 Hanshin Expressway Co Ltd Welding device for steel floor slab

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06335773A (en) * 1993-05-26 1994-12-06 Nippon Steel Weld Prod & Eng Co Ltd Method and device for profiling groove
JPH11216566A (en) * 1998-01-29 1999-08-10 Kawasaki Heavy Ind Ltd Automatic welding device for inner face of box girder
JP2005254250A (en) * 2004-03-09 2005-09-22 Nippon Steel & Sumikin Welding Co Ltd Copying welding device
JP2007197962A (en) * 2006-01-25 2007-08-09 Kawada Industries Inc Repairing method of joining part of deck plate and closed cross-sectional rib
WO2008015727A1 (en) * 2006-07-31 2008-02-07 Ihi Corporation Rigidity reinforcement plate and method of producing rigidity reinforcement plate
JP2012016710A (en) * 2010-07-06 2012-01-26 Hanshin Expressway Co Ltd Welding device for steel floor slab

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018017556A (en) * 2016-07-26 2018-02-01 プレス工業株式会社 Crack detection system for dead axle case
JP2019052432A (en) * 2017-09-13 2019-04-04 新日鐵住金株式会社 Controller for pressing device to be used in steel plate floor, pressing device comprising controller, and control method for pressing device
CN109024223A (en) * 2018-08-16 2018-12-18 武汉锂鑫自动化科技有限公司 The method and steel box-girder of U ribs of steel box girder and panel junction supplement inside weld
CN109024223B (en) * 2018-08-16 2020-06-02 武汉锂鑫自动化科技有限公司 Method for supplementing inner welding seam at joint of U rib and panel of steel box girder and steel box girder
JP2021030235A (en) * 2019-08-14 2021-03-01 日本製鉄株式会社 Welded structure
JP7421061B2 (en) 2019-08-14 2024-01-24 日本製鉄株式会社 welded structures

Similar Documents

Publication Publication Date Title
EP1314508B1 (en) Method of friction stir welding
CN105421586B (en) A kind of profile steel concrete column at urban rail transit elevated station and preparation method thereof
US8240255B2 (en) Body frame structure of railway vehicle
JP5517798B2 (en) Steel slab welding equipment
JP2013091912A (en) Method and device for repairing weld zone of steel plate deck
JP4355621B2 (en) Steel slab repair method and reinforcement method
EP2047935B1 (en) Method of producing a stiffened plate
JP2007197962A (en) Repairing method of joining part of deck plate and closed cross-sectional rib
JP6354941B2 (en) Method for suppressing groove shrinkage in automatic TIG back wave welding
US8689703B2 (en) Method for weld-joining attachment to outer panel of railway vehicle and car body side structure produced by the same
JP4952892B2 (en) Welding method for extra heavy steel plates
JP2012017563A (en) Steel plate floor and method of welding steel plate floor
JP7202464B2 (en) Repair laser welding method and repair laser welding apparatus
JP2007077749A (en) Steel floor slab and repairing method of steel floor slab
JP2016075586A (en) Method for repairing poor weld zone of metal cask weld structure and metal cask provided with heat transfer copper fins
JP2016011845A (en) Welding method for heat-transfer copper fin for metal cask and welding device therefor
JP5121420B2 (en) Hybrid welding joint
JP5418867B1 (en) Peening trolley
JP2007125573A (en) Workpiece joining method, joined body, and railroad vehicle
KR101279647B1 (en) Welding method for securing deep penetration on fillet joint
JP2013052445A (en) Laser welding method
KR100874291B1 (en) Welding method for preventing longitudinal crack at the end of butt weld
JP6339844B2 (en) Laser welding method for vehicle door sash and laser welding method for metal material
KR20120111259A (en) Welding guide
JP5632120B2 (en) Welding method

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130806

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20140415