JPS63174782A - Butt welding method for l shaped part - Google Patents
Butt welding method for l shaped partInfo
- Publication number
- JPS63174782A JPS63174782A JP400587A JP400587A JPS63174782A JP S63174782 A JPS63174782 A JP S63174782A JP 400587 A JP400587 A JP 400587A JP 400587 A JP400587 A JP 400587A JP S63174782 A JPS63174782 A JP S63174782A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- torch
- longitudinal
- horizontal
- vertical
- 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
Links
- 238000003466 welding Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 abstract description 23
- 239000002184 metal Substances 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 229910000881 Cu alloy Inorganic materials 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
（厘東上の利用分ｗ）
本元明は垂直部材と水平部材によりＬ型形状を構成する
複合部材ｔｔ溶接する方法の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Applications of the invention w) The present invention relates to an improvement in a method for tt welding a composite member forming an L-shape by a vertical member and a horizontal member.
（従来の技術）
造船における縦方向補強部材（以下ロンジ材と言う）の
突合わせ直接を行うに際し、ロンジ材の垂直部材から水
平部材へ連続して溶接する方法がとられる。(Prior Art) When directly butting longitudinal reinforcing members (hereinafter referred to as longitudinal members) in shipbuilding, a method is used in which longitudinal members are continuously welded from vertical members to horizontal members.
第２図はロンジ材の突合せ溶接方法の一例を示す模式図
である。図中１はロンジ材、２はロンジ材１と隣接する
部材、３および４はロンジ材裏側に当接した固型耐火物
、５およツ６はロンジ材の表面および下端部に当接した
銅当金であり、７は前記当材４．５および６にて囲まれ
た一先内に挿入したトーチ、８はトーチ７を同心円で囲
んだシールドガス供給ノズルであって、トーチ７はノズ
８に対して上下に摺動自在に設けである。FIG. 2 is a schematic diagram showing an example of a method of butt welding longitudinal materials. In the figure, 1 is a longitudinal material, 2 is a member adjacent to the longitudinal material 1, 3 and 4 are solid refractories in contact with the back side of the longitudinal material, and 5 and 6 are in contact with the surface and lower end of the longitudinal material. 7 is a torch inserted into the tip surrounded by the above-mentioned members 4.5 and 6, 8 is a shield gas supply nozzle surrounding the torch 7 in a concentric circle, and the torch 7 is a nozzle. 8 so as to be slidable up and down.
またシールドガス供給ノズル８およびトーチ７は、これ
らを支持する台車等の移送＋段（図示せず）にて水平方
向に移動自在に構成される。Further, the shield gas supply nozzle 8 and the torch 7 are configured to be movable in the horizontal direction on a transport stage (not shown) such as a truck that supports them.
溶接はロンジ材審直飾材の下端部から１始される。溶接
ワイヤ９が沼接開始部に送給され、蓄液金属が形成され
るに従い、トーチ７は矢印１０方向に引き上げられ、ロ
ンジ材上端に溶接金属が達すると、トーチ７は矢印１１
方向に移動されて、水平部材の溶接を垂直部材に続いて
行う。Welding starts from the lower end of the longitudinal member. As the welding wire 9 is fed to the swamp welding start part and the liquid metal is formed, the torch 7 is pulled up in the direction of the arrow 10, and when the welding metal reaches the upper end of the longitudinal material, the torch 7 moves in the direction of the arrow 11.
direction to weld the horizontal member subsequent to the vertical member.
７ａ、８ａ、９ａは水平部材溶接中のトーチ、ガスシー
ルド供給ノズル、溶接ワイヤの位置関係を示す。7a, 8a, and 9a show the positional relationships among the torch, gas shield supply nozzle, and welding wire during welding of horizontal members.
（発明が解決しようとする問題点）
ところで上記一連の溶接において、垂直部材の溶接はア
ーク溶接の中でもエレクトロガス溶接法の範ちゅうにな
るが、該溶接法では溶接速度が適正範囲を越えて太き（
なると、溶融金属の凝固時に高温われが発生することが
ある。特に開先幅が狭い時には、われ発生の危険性は史
に増大する。(Problems to be Solved by the Invention) In the series of welding described above, welding of vertical members falls under the electrogas welding method among arc welding, but in this welding method, the welding speed exceeds the appropriate range and the welding becomes thick. tree(
If this happens, high-temperature cracks may occur when the molten metal solidifies. Especially when the groove width is narrow, the risk of cracking increases.
エレクトロガス溶接の施工に際しては、われ発生の危険
がない程度に溶接速度を抑え、開先幅も適正に設定する
のは当然であるが、本発明を適用するＬＷロンジ材の垂
直部材および水平部材の交叉部においては、これら施工
上の配属が困−となる。When performing electrogas welding, it is natural to suppress the welding speed to such an extent that there is no risk of cracking, and to set the groove width appropriately. At the intersection of the two, it becomes difficult to allocate these during construction.
すなわちＬＷロンジ材’ｔａ’ｖ開先で突合わせる場合
に、音直部材と水平部材は、割れや溶は込み不良等の欠
陥発生防止な考延に入れた適正な開先に加工し得るが、
垂直部材と水平部材の交叉部の開先形状は、垂直および
水平・部材の開先加工によって二次的に決定されるため
適正な形状とならない。In other words, when butting LW longitudinal materials with a 'ta'v groove, the vertical member and the horizontal member can be processed into an appropriate groove that takes into account the prevention of defects such as cracks and poor welding. ,
The shape of the groove at the intersection of the vertical member and the horizontal member is determined secondarily by the bevel processing of the vertical and horizontal members, and therefore does not have an appropriate shape.
第３図はロンジ材の開先形状の一例を示す。同図におい
て、（ａ）はロンジ材の部分側面図、（ｂ）は（ａ）の
正面図を示し、（ｃ）および（ｄ）はそれぞれｈ−Ｎ断
面、Ｂ−Ｂ′−１面の開先形状を示す。FIG. 3 shows an example of the groove shape of the longitudinal material. In the figure, (a) shows a partial side view of the longitudinal material, (b) shows a front view of (a), and (c) and (d) show the h-N cross section and the B-B'-1 plane, respectively. Shows the groove shape.
図に示す如く垂直部材および水平部材の一先ルート間隙
’＆Ｇに、開先角度ｔαにすべ（開先加工を施した時、
又又部Ｋにおけるルート間隙はＧよりも小さいｇとなる
。これはヌ叉部Ｋにおける板厚Ｔが垂直部材の板厚ｔよ
り実質的に大となるためである。As shown in the figure, when the beveling is performed at the bevel angle tα in the first root gap '&G of the vertical member and the horizontal member,
The root gap at the fork section K is g, which is smaller than G. This is because the plate thickness T at the neck portion K is substantially larger than the plate thickness t of the vertical member.
従つ【開先形状（ｄ）は形状（ｃ）と比較して板厚が大
きいわりには、開先広さＷが形状（ｃ）のＷと同じであ
り、笑質上狭囲先になっている。Therefore, although the groove shape (d) has a larger plate thickness than the shape (c), the groove width W is the same as that of the shape (c), resulting in a narrow groove in terms of texture. ing.
このような狭開先を、適正な開先形状を構成する金属部
材と同−溶接輪作で溶接すると、溶融金属の凝固時に高
温割れの発生する危険性は太きいと言える。If such a narrow groove is welded in the same welding rotation as a metal member constituting an appropriate groove shape, there is a high risk of hot cracking occurring during solidification of the molten metal.
ましてＬ型ロンジは薄板を使用していながら、大きな外
部応力にも耐えられるようＬ型に構成されているもので
あって、溶接に猷して溶融金属の凝固方向に対する拘束
力も太きいと考えられるので、凝固割れに対し充分な対
策を講じる必要がある。Moreover, although the L-shaped longitudinal is made of thin plates, it is configured in an L-shape to withstand large external stresses, and is thought to have a large restraining force on the solidification direction of molten metal when used in welding. Therefore, it is necessary to take sufficient measures against solidification cracking.
そこで割れの発生しやすい部分に溶接部が到達した時に
小電流を用いて溶接するとか、特公昭４４−３４４６号
公報に【提案されている如く、溶接電流の供紺および溶
接ワイヤの送給を断続的に行いながら溶接して、割れの
発生を防止する等の対策ヲ講じることが考えられるが、
いずれの方法も溶接所要時間が長（なり、能率面からみ
て問題となり、溶接電流の切換えおよび断続の為に特別
に制御装置が必要となり、操作上からもコスト面からも
充分な対策と言えない。Therefore, when the welding part reaches a part where cracks are likely to occur, welding is carried out using a small electric current. It may be possible to take measures such as welding intermittently to prevent cracking, but
Both methods take a long time to weld, which poses problems from an efficiency standpoint, and require a special control device to switch and intermittent the welding current, making them unsatisfactory from both an operational and cost perspective. .
（問題点を解決するための手段）
本発明は上記問題点に鑑みなされたものであって、Ｌ型
ロンジ材の３２＋１き開先形状変化のある母材の溶接に
際して予想される１割れの発生を防止できる溶接方法を
提供しようとするものであり、その要旨は、垂直部材と
水平部材によりＬ型形状を構成する複合部材を、垂ｍ部
材から水平部材へと連続して突合わせ溶接する方法にお
いて、前記複合部材は表側開先幅が裏Ｗ開先幅より広い
Ｖ開先を形成して突合わせ、水平部材の交叉部を含む垂
直部材裏側に銅当金を当接し、垂直部材表側には固型耐
火＠を当接して溶接すること’を、６を除黴とするアー
ク溶接方法にある。(Means for Solving the Problems) The present invention has been made in view of the above problems, and the occurrence of one crack that is expected when welding a base metal with a 32+1 groove shape change of L-shaped longitudinal material. The purpose is to provide a welding method that can prevent this, and its gist is to butt-weld a composite member that forms an L-shape from a vertical member to a horizontal member in a continuous manner from the vertical member to the horizontal member. In this method, the composite member is butted by forming a V groove in which the front side groove width is wider than the back W groove width, and a copper butt is brought into contact with the back side of the vertical member including the intersection of the horizontal members, and the vertical member is placed on the front side of the vertical member. 6 is an arc welding method in which mold is removed by welding by contacting solid refractory @.
（作用） 以下、本発明を図面に従い詳述する。(effect) Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は本発明方法ｔロンジ材の突合わせ溶接に適用し
た例を示す。図中１はロンジ材、２はロンジ材ｌと瞬接
する部材、３はロンジ材１の水平部材裏側に当接した固
型耐火物、１２はロンジ材１の水平部材の交叉部を含む
垂直部材裏側に当接した銅当金、１３は垂直部材表側に
当接した固型耐火物、６はロンジ柱下４７Ｊ部に当接し
た銅当金であり、７は前記当材１２．１３および６にて
囲まれた一先内に挿入したトーチ、８はトーチ７を同心
円で囲んだシールドガス供給ノズルであってノズル８に
対して上下に摺動自在に設けである。FIG. 1 shows an example in which the method of the present invention is applied to butt welding of longitudinal materials. In the figure, 1 is a longitudinal member, 2 is a member that makes instant contact with the longitudinal member 1, 3 is a solid refractory that is in contact with the back side of the horizontal member of the longitudinal member 1, and 12 is a vertical member that includes the intersection of the horizontal member of the longitudinal member 1. 13 is a solid refractory that is in contact with the front side of the vertical member, 6 is a copper butt that is in contact with the lower longitudinal column 47J, and 7 is the above-mentioned abutting material 12, 13 and 6. The torch 8 inserted into the first part surrounded by is a shield gas supply nozzle that surrounds the torch 7 in a concentric circle, and is provided so as to be able to freely slide up and down with respect to the nozzle 8.
またシールドガス供給ノズル８およびトーチ７はこれら
を支持する台車等の移送手段（図示せず）にて水平方向
に移動自在に構成される。Further, the shield gas supply nozzle 8 and the torch 7 are configured to be movable in the horizontal direction by a transport means (not shown) such as a truck that supports them.
溶接はロンジ材琺直部材下端部から開始し、溶接金属が
形成堆積されるに従いトーチ７を矢印１０方向に引き上
げ、ロンジ材１の上端に溶接金属が達すると、トーチ７
及びノズル８を矢印１１方向に移動させて水平部材の溶
接ｙａ′舌亘舌打部材いて行う。Welding starts from the lower end of the longitudinal member, and as weld metal is formed and deposited, the torch 7 is pulled up in the direction of arrow 10. When the weld metal reaches the upper end of the longitudinal member 1, the torch 7 is pulled up.
Then, the nozzle 8 is moved in the direction of the arrow 11 to perform welding of the horizontal member ya' across the tongue.
７ａ、８ａ、９ａは水平部材溶接中のトーチ、ガスシー
ルドノズル、溶接ワイヤの位置関係を示す。7a, 8a, and 9a show the positional relationships among the torch, gas shield nozzle, and welding wire during welding of horizontal members.
上記１ｆ４＃：及び手順により溶接した時の効果を、溶
接後のロンジ材溶接部断面マクロ組祇により従来方法と
比較して述べる。The effects of welding according to the above 1f4# and procedure will be described in comparison with the conventional method by looking at the cross-sectional macro assembly of the welded section of the longitudinal material after welding.
第５図は本発明方法、第４図は第２図に示した従来方法
によ°り溶接した時の垂直・部材及び水平部材交叉部マ
クロ組峨を模式的に表したものである。FIG. 5 schematically shows the macroscopic assemblage at the intersection of vertical members and horizontal members when welded by the method of the present invention and FIG. 4 by the conventional method shown in FIG. 2.
図に示した如く、開先表側に銅当金を、裏側に同型耐火
物を当接した従来方法では、開先光測に固型耐大切を、
ｒＡ側に銅当金を当接した本発明方法で溶接した溶接部
と比較すると、溶融金属の最終凝固部が板厚中央部に近
くなっていて柱状晶１４の会合部に、低融点不純物が凝
集し、低い応力で割れ１５が発生し易い組織となる。As shown in the figure, in the conventional method of abutting a copper butt on the front side of the groove and the same type of refractory on the back side, a solid refractory was used for optical measurement of the groove.
Compared to the welded part welded by the method of the present invention in which a copper abutment is brought into contact with the rA side, the final solidified part of the molten metal is closer to the center of the plate thickness, and low melting point impurities are present in the meeting part of the columnar crystals 14. It aggregates and becomes a structure in which cracks 15 are likely to occur under low stress.
一方、本発明方法では固型耐火物で保持された表ビード
が冷却されにくく、最終凝固部が開先表側の板厚狭面近
傍になっていて柱状晶１４が会合せず、割れが発生しに
くい組織となる。On the other hand, in the method of the present invention, the surface bead held by the solid refractory is difficult to cool down, and the final solidification part is near the narrow plate thickness surface on the front side of the groove, so the columnar crystals 14 do not come together and cracks are difficult to occur. Become an organization.
なお、本発明方法を実施するにあたって、水平部材裏面
に当接する当材は固型耐火物、銅版、ガラス繊維材ある
いはこれらを組合わせた材質のいずれを用いても差しつ
かえはなく、また水平部材との交叉部を含む垂直部材裏
面と銅当金１２の間に、銅当金１２のアークによる涜損
防止のためガラス繊維材を介在させても本発明方法の効
果にかわりはない。In carrying out the method of the present invention, the material that comes into contact with the back surface of the horizontal member may be solid refractory, copper plate, glass fiber material, or a combination of these materials; Even if a glass fiber material is interposed between the back surface of the vertical member including the intersection with the copper dot 12 and the copper dot 12 in order to prevent deterioration of the copper dot 12 due to arcing, the effect of the method of the present invention will not change.
（実施例）
直径１．６ＷＩＪｌのマイクロワイヤを用い、垂直部材
板厚１７１１１１１、水平部材１２−のＬ型ロンジ材を
Ｃｏｔシールドアーク溶接した。水平部材の共当材と垂
直部材の表側に当接する固型耐火物は５ｔｙｘ 、Ａ４
０ｓおよびＭｇＯｔｊｘ主成分とする耐火物を用い、垂
直部材の裏当材には銅板を便用した。(Example) Using a microwire with a diameter of 1.6 WIJl, Cot shielded arc welding was performed on L-shaped longitudinal members of a vertical member with a thickness of 1711111 and a horizontal member of 12-. The solid refractories that contact the horizontal members and the front side of the vertical members are 5tyx, A4.
A refractory material mainly composed of 0s and MgOtjx was used, and a copper plate was conveniently used as the backing material for the vertical member.
溶接後超音波探傷試−により、割れの有無を試験し、更
に当直及び水平部材交叉部よりマクロ組處試験片を採取
し″Ｃ観察し、割れの無いことを確認した。After welding, the presence or absence of cracks was tested by ultrasonic testing, and macro assembly test pieces were taken from the intersection of the shift and horizontal members and observed to confirm that there were no cracks.
（発明の効果）
以上説明した如く、本発明方法によれば、所望の開先形
状に加工することが田畑な部分を含む、ロンジ材等のＬ
型部材を溶接する際に、部材に当接する当材を工夫した
ことにより、溶接部のナゲツト形状を改曽し、耐割れ性
を向上させることができる。(Effects of the Invention) As explained above, according to the method of the present invention, it is possible to obtain L
When welding mold members, by devising the material that contacts the members, it is possible to change the nugget shape of the welded portion and improve cracking resistance.
なお、本発明の目的は世直及び水平部材交叉部の耐割れ
性を改署することが主であるが、副次的には垂直一部材
そのものの耐割れ性をも同上させることができることは
勿論である。Although the main purpose of the present invention is to improve the cracking resistance of vertical and horizontal member intersections, it is also possible to improve the cracking resistance of vertical members themselves. Of course.
′ｆｆ１１図は本発明方法の実施態様を示す模式図、第
２図は従来方法の一例！示す模式図、第３図ａ、ｂ、ｃ
及びｄは本発明方法を適用するロンジ材の開先形状の説
明図、第４図は従来方法による溶接部マクロ組織の模式
図、第５図は本発明方法による溶接部マクロ組織の模式
図である。
１・・・ロンジ材 ２・・・隣接部材３．４，１
３・・・固型耐火物
５．６．１１２・・・銅当金 ７．７ａ・・・トーチ８
．８ａ・・・シールドガス供給ノズル９．９ａ・・・ｄ
ｉワイヤ １０・・・トーチ上昇方向１１・・・トーチ
水平移動方向
１４・・・柱状晶 １５・・・割れＷ・・・開
先幅 Ｔ、 ｔ・・・板厚Ｇ・・・開先間隙
ｇ・・・又又部間隙Ｋ・・・垂直及び水平部材交
叉部
α・・・開先角度
代理人 弁理士 茶野木 立 夫
第１ＦｊＡ
第２図
た−／′−
第３′図
（ａ） （ｃ）'ff Figure 11 is a schematic diagram showing an embodiment of the method of the present invention, and Figure 2 is an example of the conventional method! Schematic diagram shown in Figure 3 a, b, c
and d are explanatory diagrams of the groove shape of the longitudinal material to which the method of the present invention is applied, Figure 4 is a schematic diagram of the macrostructure of the welded part by the conventional method, and Figure 5 is a schematic diagram of the macrostructure of the welded part by the method of the present invention. be. 1... Longitudinal material 2... Adjacent member 3.4,1
3...Solid refractory 5.6.112...Copper dowel 7.7a...Torch 8
．． 8a... Shield gas supply nozzle 9.9a...d
i-wire 10...Torch rising direction 11...Torch horizontal movement direction 14...Columnar crystal 15...Crack W...Groove width T, t...Plate thickness G...Group gap
g...Further gap K...vertical and horizontal member intersection α...bevel angle agent Patent attorney Tatsuo Chanoki 1st FjA Fig. 2 -/'- Fig. 3' (a) (c)
Claims (1)
を、垂直部材から水平部材へと連続して突合わせアーク
溶接する方法において、前記複合部材を表側開先幅が裏
側開先幅より広いＶ開先を形成して突合わせ、水平部材
の交叉部を含む垂直部材裏側に銅当金を当接し、垂直部
材表側には固型耐火物を当接して溶接することを特徴と
するＬ形状部材突合わせ溶接方法。In a method of sequentially butt arc welding a composite member that is configured into an L-shape by a vertical member and a horizontal member from the vertical member to the horizontal member, the composite member is welded in a V shape in which the front side groove width is wider than the back side groove width. An L-shaped member characterized in that grooves are formed and butted together, a copper butt is brought into contact with the back side of the vertical member including the intersection of the horizontal members, and a solid refractory is brought into contact with the front side of the vertical member for welding. Butt welding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP400587A JPS63174782A (en) | 1987-01-13 | 1987-01-13 | Butt welding method for l shaped part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP400587A JPS63174782A (en) | 1987-01-13 | 1987-01-13 | Butt welding method for l shaped part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63174782A true JPS63174782A (en) | 1988-07-19 |
| JPH057113B2 JPH057113B2 (en) | 1993-01-28 |
Family
ID=11572869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP400587A Granted JPS63174782A (en) | 1987-01-13 | 1987-01-13 | Butt welding method for l shaped part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63174782A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511656A (en) * | 1974-06-29 | 1976-01-08 | Seikenkai | HAMIGAKI |
| JPS528255A (en) * | 1975-06-04 | 1977-01-21 | Tridon Serflex Sa | Screw type fastening band |
-
1987
- 1987-01-13 JP JP400587A patent/JPS63174782A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511656A (en) * | 1974-06-29 | 1976-01-08 | Seikenkai | HAMIGAKI |
| JPS528255A (en) * | 1975-06-04 | 1977-01-21 | Tridon Serflex Sa | Screw type fastening band |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH057113B2 (en) | 1993-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080206586A1 (en) | Penetration welding method of t-type joint and penetration welding structure of t-type joint | |
| US2342086A (en) | Method of welding magnesium and alloys thereof | |
| US3922519A (en) | Method for a build-up welding of different metals | |
| JPH05277740A (en) | Welding method for clad steel pipe | |
| JPS63174782A (en) | Butt welding method for l shaped part | |
| US6410876B1 (en) | Method for orbital welding of small-, medium-, and large-diameter pipes | |
| JPH058088A (en) | Connecting method and positioning and fixing device for metallic strips | |
| KR20140137784A (en) | Slab defect removing apparatus and method using it | |
| KR101162246B1 (en) | Tap piece for generating starting arc in arc welding | |
| JPH02187272A (en) | First layer welding method for one-side welding | |
| JP3256089B2 (en) | Non-consumable nozzle type electroslag welding method | |
| JPS6124108B2 (en) | ||
| JPS626909B2 (en) | ||
| KR102187763B1 (en) | Ceramic backing material for horizontal welding | |
| JP3139326B2 (en) | One-sided butt welding method for fixed pipe | |
| JP2646388B2 (en) | Gas shielded arc welding method | |
| JPH0994657A (en) | Final end crack preventing method in one side butt welding | |
| US2975266A (en) | Gas shielded electric arc welding | |
| JP3520743B2 (en) | Girth welding method and girth welding structure | |
| JP2599977B2 (en) | Method of manufacturing clad steel plate structure | |
| JPH08168879A (en) | One side butt welding method for fixed tube | |
| JPH0263683A (en) | Mag welding method | |
| JPS5823833B2 (en) | Butt welding method for fixed pipes | |
| Dickerson | Quality control in aluminum arc welding | |
| JPS6250076A (en) | Penetration welding method using water cooling type backing strip |