JPH08132273A - Method for reducing strain in welding - Google Patents

Method for reducing strain in welding

Info

Publication number
JPH08132273A
JPH08132273A JP30010594A JP30010594A JPH08132273A JP H08132273 A JPH08132273 A JP H08132273A JP 30010594 A JP30010594 A JP 30010594A JP 30010594 A JP30010594 A JP 30010594A JP H08132273 A JPH08132273 A JP H08132273A
Authority
JP
Japan
Prior art keywords
welding
plate material
flat plate
horizontal plate
heated
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.)
Granted
Application number
JP30010594A
Other languages
Japanese (ja)
Other versions
JP3388924B2 (en
Inventor
Katsu Kodama
児玉  克
Hiroshi Iwabuchi
寛 岩渕
Masaru Matsumoto
勝 松本
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP30010594A priority Critical patent/JP3388924B2/en
Publication of JPH08132273A publication Critical patent/JPH08132273A/en
Application granted granted Critical
Publication of JP3388924B2 publication Critical patent/JP3388924B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Butt Welding And Welding Of Specific Article (AREA)
  • General Induction Heating (AREA)

Abstract

PURPOSE: To enable welding at low cost and with high efficiency, in the welding of a T-shaped structure, by reducing strain to the minimum without damaging a welding zone. CONSTITUTION: With a consumable electrode welding torch 3, 3' and a high frequency induction coil 10 fixed, a T-shaped structure (formed with a horizontal plate 1 and a vertical plate 2) is moved. Prior to the welding, the reverse side of the horizontal plate 1 is first heated using the high frequency induction coil 10, and the T-shaped structure is moved in the direction of the arrow 8. As a result, as the structure goes away from the coil 10, the heated part on the reverse side of the horizontal plate 1 is cooled and deformed in chevron shape to the coil side. Then, the front surface side of the horizontal plate is welded with the fillet of the T-shaped joint with the consumable electrode welding torch 3, 3'. As a result, the front surface side of the horizontal plate is heated this time and, with a deformation occurring in the inverted chevron shape, both deformations are offset with each other; the horizontal plate becomes a flat panel, enabling welding with little strain.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はT型構造物の溶接に於い
て、被溶接部を傷つけることなしに溶接歪みを最小限に
低減する溶接歪み低減法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding distortion reducing method for welding a T-shaped structure which minimizes welding distortion without damaging a welded portion.

【0002】[0002]

【従来の技術】従来、平板材と立板材をT型に組合せて
形成したT型溶接構造物における隅肉溶接において、平
板材の裏面側を隅肉溶接に先行して加熱する方法があ
る。
2. Description of the Related Art Conventionally, in fillet welding in a T-type welded structure formed by combining a flat plate material and a standing plate material in a T shape, there is a method of heating the back surface side of the flat plate material prior to the fillet welding.

【0003】その1例を図2に示す。図2(a)は側面
図、図2(b)は正面図で図において1は平板材、2は
立板材で、これをT型に組合せその隅肉部を溶接するこ
とによりT型構造物を形成する。
An example thereof is shown in FIG. 2 (a) is a side view, FIG. 2 (b) is a front view, and in the figure, 1 is a flat plate material, 2 is a standing plate material, which are combined in a T shape and the fillet portion thereof is welded to form a T shape structure. To form.

【0004】3は隅肉溶接用消耗電極溶接トーチ、4は
TIG溶接トーチ、5は平板材上の溶接線、5′は立板
材2を挟んで前記溶接線5と対象になる溶接線、6は溶
接ビードである。
Reference numeral 3 is a consumable electrode welding torch for fillet welding, 4 is a TIG welding torch, 5 is a welding line on a flat plate material, 5'is a welding line which is a target of the welding line 5 with the standing plate material 2 interposed therebetween, 6 Is a weld bead.

【0005】また7は平板材2上の溶接線5の裏面側に
なるライン、7′は別の溶接線5′の裏面側になるライ
ンである。
Reference numeral 7 is a line on the back side of the welding line 5 on the flat plate material 2, and 7'is a line on the back side of another welding line 5 '.

【0006】8は平板材1と立板材2とで構成したT型
構造物の移動方向を示す矢印である。
Reference numeral 8 is an arrow indicating the moving direction of the T-shaped structure composed of the flat plate material 1 and the standing plate material 2.

【0007】つぎに従来法による溶接作業について説明
すると、消耗電極溶接トーチ3とTIG溶接トーチ4は
固定されており、T型構造物(平板1、立板2)が移動
する。
Next, the conventional welding operation will be described. The consumable electrode welding torch 3 and the TIG welding torch 4 are fixed, and the T-shaped structure (flat plate 1, standing plate 2) moves.

【0008】まずTIG溶接トーチ4では前記溶接線5
の平板裏面側に相当するライン7に沿って、TIG溶接
トーチ4の電極と平板材1の間でアークを発生させる。
このアーク熱によって平板材裏面側は加熱されることに
なる。
First, in the TIG welding torch 4, the welding line 5
An arc is generated between the electrode of the TIG welding torch 4 and the flat plate material 1 along a line 7 corresponding to the back surface side of the flat plate.
The back side of the flat plate material is heated by this arc heat.

【0009】平板材1は移動しながら加熱される事にな
り、TIG溶接トーチ4と消耗電極溶接トーチ3との距
離を適正に選ぶと、TIG溶接トーチ4から遠ざかるに
従い、平板材1の裏面側は冷却し、TIG溶接トーチ側
へ“へ”の字に変形することになる。これは線上加熱の
原理と同じ作用である。
Since the flat plate material 1 is heated while moving, if the distance between the TIG welding torch 4 and the consumable electrode welding torch 3 is properly selected, as the distance from the TIG welding torch 4 increases, the back surface side of the flat plate material 1 will be removed. Will cool and will be transformed into a "he" shape to the TIG welding torch side. This is the same action as the principle of linear heating.

【0010】その後、さらに平板材1が移動して行き、
平板材1の溶接線5に沿って、消耗電極溶接トーチ3に
より隅肉溶接が施される。このとき、溶接入熱が平板材
1の表面側に投入される事になる。したがって、この溶
接入熱により“へ”の字に変形していた平板は“逆へ”
の字に変形しようとして、結果的には両方の変形が相殺
されて、平板材1は溶接後、変形のないフラットパネル
となる。
After that, the flat plate material 1 further moved,
Fillet welding is performed by the consumable electrode welding torch 3 along the welding line 5 of the flat plate material 1. At this time, the welding heat input is applied to the front surface side of the flat plate material 1. Therefore, the flat plate that had been deformed into a "he" shape due to this welding heat input was "reverse".
When the flat plate material 1 is welded, the flat plate material 1 becomes a flat panel having no deformation after the welding.

【0011】つぎに、同じ作用を、別の溶接線5′の溶
接と平板材1の裏面側のライン7′の加熱に施し、T型
構造物の継手を完成させる。本作用により、溶接歪みの
少ない溶接が可能となる。
Next, the same action is applied to welding of another welding line 5'and heating of the line 7'on the back surface side of the flat plate material 1 to complete the joint of the T-shaped structure. This operation enables welding with less welding distortion.

【0012】[0012]

【発明が解決しようとする課題】ところで前述のような
従来の隅肉溶接法においては下記のような不具合点が存
在する。 (1)平板材1の裏面側をTIG溶接からのアーク熱で
加熱するため、加熱部はその表面が溶融にいたることが
あり、平板材1裏面側の表面を傷つける恐れがある。そ
のため、溶接後、傷ついた部分の補修を強いられること
になる。
However, the conventional fillet welding method as described above has the following drawbacks. (1) Since the back surface side of the flat plate material 1 is heated by the arc heat from TIG welding, the surface of the heating portion may be melted, and the front surface of the flat plate material 1 may be damaged. Therefore, after welding, the damaged portion must be repaired.

【0013】(2)本従来法では、TIG溶接での加熱
領域が狭いため、溶接線5及び5′の溶接に対して、そ
れぞれ別個にしか溶接できない。そのため、立板材2を
挟んで溶接線5及び5′を同時に溶接することができ
ず、溶接作業の低下を招いている。
(2) In this conventional method, since the heating region in TIG welding is narrow, it is possible to weld the welding lines 5 and 5'only separately. Therefore, the welding lines 5 and 5'cannot be welded at the same time with the standing plate member 2 interposed therebetween, which causes a decrease in welding work.

【0014】本発明は上記各不具合点を解消した新たな
溶接歪みを低減した隅肉溶接法を提供することを目的と
している。
It is an object of the present invention to provide a new fillet welding method which eliminates the above-mentioned problems and reduces welding distortion.

【0015】[0015]

【課題を解決するための手段】前記目的を達成するため
本発明の溶接歪み低減法は、平板材と立板材をT型に組
み合わせ、T型構造物を形成する際におけるT型継手部
の隅肉溶接において、前記平板材における隅肉溶接部の
裏面側を隅肉溶接に先行して、高周波加熱により発熱さ
せることを特徴としている。
In order to achieve the above object, the welding distortion reducing method of the present invention is a corner of a T-shaped joint portion when a T-shaped structure is formed by combining a flat plate material and a standing plate material into a T-shaped structure. In the meat welding, the back side of the fillet welded portion of the flat plate material is characterized by generating heat by high frequency heating prior to the fillet welding.

【0016】[0016]

【作用】本発明の溶接歪み低減法においては、T型構造
物のT型継手部の隅肉溶接に先立ち、まず高周波誘導コ
イルを用いて平板材における隅肉溶接部の裏面側を誘導
加熱し発熱させる。この結果平板材の発熱した部分は移
動により高周波誘導コイルから遠ざかるにつれて冷却
し、高周波誘導コイル側へ“へ”の字に変形する。
In the welding distortion reducing method of the present invention, prior to the fillet welding of the T-shaped joint of the T-shaped structure, the back side of the fillet-welded portion of the flat plate material is induction-heated using a high frequency induction coil. Heat up. As a result, the heat-generating portion of the flat plate material is cooled as it moves away from the high-frequency induction coil, and is deformed into a "V" shape toward the high-frequency induction coil side.

【0017】その後、移動してきた平板材の表面側は消
耗電極溶接トーチにより隅肉溶接されることとなり、平
板材の表面側が溶接入熱により加熱され平板材は“逆
へ”の字に変形しようとして、結果的に高周波誘導コイ
ルによる変形と溶接入熱による変形が相殺されて溶接終
了時には平板材はフラットなパネルとなり溶接歪みの少
ない溶接ができる。
After that, the surface side of the moving flat plate material is fillet-welded by the consumable electrode welding torch, and the surface side of the flat plate material is heated by welding heat input, so that the flat plate material will be deformed into "reverse" shape. As a result, the deformation due to the high-frequency induction coil and the deformation due to the welding heat input are canceled out, and the flat plate material becomes a flat panel at the end of welding, and welding with less welding distortion can be performed.

【0018】[0018]

【実施例】以下図面により本発明の1実施例について説
明する。図1は本発明の1実施例の構成図で(a)は側
面図、(b)は正面図を示す。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are configuration diagrams of one embodiment of the present invention. FIG. 1A is a side view and FIG. 1B is a front view.

【0019】図において、1は平板材、2は立板材で、
これをT型に組合せて溶接しT型構造物を形成する。
In the figure, 1 is a flat plate material, 2 is a standing plate material,
This is combined with T type and welded to form a T type structure.

【0020】3は平板材1上の一方の溶接線5を溶接す
るための消耗電極溶接トーチ、3′は平板材1上の別の
溶接線5′を溶接するための消耗電極溶接トーチであ
る。そして溶接トーチ3,3′は立板材2を挟んで対象
位置に対向配置している。
Reference numeral 3 is a consumable electrode welding torch for welding one welding line 5 on the flat plate material 1, and 3'is a consumable electrode welding torch for welding another welding line 5'on the flat plate material 1. . The welding torches 3 and 3'are arranged to face the target position with the standing plate member 2 interposed therebetween.

【0021】6は溶接ビード、7,7′は平板材1の裏
面側となるライン、8はT型構造物の移動方向を示すも
ので、これらは従来法で説明した図2のものと同様であ
る。
6 is a weld bead, 7 and 7'are lines on the back side of the flat plate material 1, and 8 is a moving direction of the T-shaped structure. These are the same as those in FIG. 2 explained in the conventional method. Is.

【0022】10は平板材1の裏面側を発熱させるため
の高周波誘導コイル、11は整合トランス、12は高周
波電源である。
Reference numeral 10 is a high frequency induction coil for heating the back surface of the flat plate material 1, 11 is a matching transformer, and 12 is a high frequency power source.

【0023】次に、本発明の1実施例の作用について説
明する。消耗電極溶接トーチ3,3′及び高周波誘導コ
イル10は固定されており、T型構造物(平板材1、立
板材2で形成する。)が移動する。
Next, the operation of one embodiment of the present invention will be described. The consumable electrode welding torches 3 and 3'and the high frequency induction coil 10 are fixed, and the T-shaped structure (formed by the flat plate material 1 and the standing plate material 2) moves.

【0024】まず、溶接に先立ち、高周波誘導コイル1
0を用いて平板材1の裏面側を発熱させる。なお、高周
波誘導コイル10は予め、溶接線5,5′の平板材の裏
面側となるライン7,7′が最大に発熱するようなコイ
ル設計としておき、整合トランス11で溶接電源12と
のマッチングを取っておく。
First, prior to welding, the high frequency induction coil 1
0 is used to generate heat on the back surface side of the flat plate material 1. The high frequency induction coil 10 is designed in advance so that the lines 7, 7'on the back side of the flat plate material of the welding lines 5, 5'will generate maximum heat, and the matching transformer 11 will match the welding power source 12. Set aside.

【0025】高周波誘導コイル10に電力を入力する
と、平板材1の裏面側は誘導加熱により、平板材自体が
発熱することとなる、また、表皮効果により平板材1の
裏面の表面が主に加熱することとなる。
When power is input to the high frequency induction coil 10, the back surface side of the flat plate material 1 is heated by induction heating, and the back surface of the flat plate material 1 is mainly heated by the skin effect. Will be done.

【0026】これにより、消耗電極溶接トーチ3,3′
と高周波誘導コイル10との距離を適正に選ぶと、T型
構造物の矢示8方向への移動により平板材1の裏面が発
熱した部分は高周波誘導コイル10から遠ざかるにつれ
て冷却し、高周波誘導コイル10側へ平板材は“へ”の
字に変形することになる。
Thereby, the consumable electrode welding torches 3, 3 '
When the distance between the high-frequency induction coil 10 and the high-frequency induction coil 10 is properly selected, the portion of the back surface of the flat plate material 1 that has generated heat due to the movement of the T-shaped structure in the direction of the arrow 8 is cooled as the distance from the high-frequency induction coil 10 increases, The flat plate material on the side of 10 is deformed into a "he" shape.

【0027】その後、平板材1の表面側は消耗電極溶接
トーチ3,3′により隅肉溶接されることとなるため、
今度は平板材1の表面側が溶接入熱により加熱されるた
め、平板材は“逆へ”の字に変形しようとして、結果的
に、高周波誘導コイル10による変形と溶接入熱による
変形が相殺されて、溶接終了時には平板材はフラットな
パネルとなり溶接歪みの少ない溶接ができる。
After that, the surface side of the flat plate material 1 is to be fillet welded by the consumable electrode welding torches 3, 3 '.
Since the surface side of the flat plate material 1 is heated by the welding heat input this time, the flat plate material tries to be deformed in a "reverse" shape, and as a result, the deformation due to the high frequency induction coil 10 and the deformation due to the welding heat input are offset. At the end of welding, the flat plate material becomes a flat panel and welding with less welding distortion can be performed.

【0028】以上本発明の1実施例につき縷々説明した
が、本発明は上記実施例に限定されるものでなく本発明
技術思想の範囲内において種々変更が可能であり、それ
らは何れも本発明の技術的範囲に属する。
Although one embodiment of the present invention has been briefly described above, the present invention is not limited to the above embodiment and various modifications can be made within the scope of the technical idea of the present invention. Belong to the technical scope of.

【0029】[0029]

【発明の効果】以上述べたように本発明によれば次に示
す効果を奏する。 (1)高周波誘導コイルを用いて平板材裏面側を直接発
熱させるため、平板材裏面側になんら損傷を与えること
はない。従って、溶接後の手直し等の後処理は必要な
く、低コストでの溶接歪みの少ないT型溶接構造物の溶
接継手を製作することができる。
As described above, the present invention has the following effects. (1) Since the back side of the flat plate material is directly heated by using the high frequency induction coil, the back side of the flat plate material is not damaged at all. Therefore, no post-treatment such as reworking after welding is required, and a welded joint of a T-type welded structure with low welding distortion can be manufactured at low cost.

【0030】(2)高周波誘導コイルを用いて平板材裏
面側を直接発熱させるため、ライン7,7′を同時に発
熱させる事ができる。そのため、溶接は立板材を挟んだ
溶接線3,3′を同時に溶接できる。したがって、従来
法に比べ2倍の作業効率となり、高効率な溶接歪みの少
ない溶接が可能となる。
(2) Since the back side of the flat plate material is directly heated by using the high frequency induction coil, the lines 7 and 7'can be simultaneously heated. Therefore, the welding can simultaneously weld the welding lines 3 and 3 ′ sandwiching the standing plate material. Therefore, the work efficiency is twice as high as that of the conventional method, and it is possible to perform highly efficient welding with less welding distortion.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施例の構成を示し(a)は側面
図、(b)は正面図である。
FIG. 1 is a side view and FIG. 1B is a front view showing a configuration of a first embodiment of the present invention.

【図2】従来法の構成を示し、(a)は側面図、(b)
は正面図である。
2A and 2B show a configuration of a conventional method, in which FIG. 2A is a side view and FIG.
Is a front view.

【符号の説明】[Explanation of symbols]

1 平板材 2 立板材 3,3′ 消耗電極溶接トーチ 5,5′ 溶接線 6 溶接ビード 7,7′ 平板材の裏面側ライン 8 T型構造物の移動方向 10 高周波誘導コイル 11 整合トランス 12 高周波電源 1 flat plate material 2 standing plate material 3, 3'consumable electrode welding torch 5, 5'welding line 6 welding bead 7, 7'back surface side line of flat plate material 8 moving direction of T-shaped structure 10 high frequency induction coil 11 matching transformer 12 high frequency Power supply

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 平板材と立板材をT型に組み合わせ、T
型構造物を形成する際におけるT型継手部の隅肉溶接に
おいて、前記平板材における隅肉溶接部の裏面側を隅肉
溶接に先行して、高周波加熱により発熱させることを特
徴とする溶接歪み低減法。
1. A flat plate material and a standing plate material are combined in a T-shape,
In fillet welding of a T-shaped joint portion when forming a mold structure, a welding strain is characterized in that the back side of the fillet weld portion of the flat plate material is heated by high frequency heating prior to fillet welding. Reduction method.
JP30010594A 1994-11-10 1994-11-10 Welding distortion reduction method Expired - Fee Related JP3388924B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30010594A JP3388924B2 (en) 1994-11-10 1994-11-10 Welding distortion reduction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30010594A JP3388924B2 (en) 1994-11-10 1994-11-10 Welding distortion reduction method

Publications (2)

Publication Number Publication Date
JPH08132273A true JPH08132273A (en) 1996-05-28
JP3388924B2 JP3388924B2 (en) 2003-03-24

Family

ID=17880782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30010594A Expired - Fee Related JP3388924B2 (en) 1994-11-10 1994-11-10 Welding distortion reduction method

Country Status (1)

Country Link
JP (1) JP3388924B2 (en)

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WO2016052722A1 (en) * 2014-10-03 2016-04-07 新日鐵住金株式会社 Weld construction member and manufacturing method thereof
JP2017159370A (en) * 2017-06-26 2017-09-14 株式会社Ihi Fillet weld method
CN111770598A (en) * 2020-07-07 2020-10-13 中国铁建重工集团股份有限公司 Preheating device and preheating method for TBM (tunnel boring machine) tool apron welding

Cited By (11)

* Cited by examiner, † Cited by third party
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