JPH02299780A - Welding method for high damping steel sheet - Google Patents
Welding method for high damping steel sheetInfo
- Publication number
- JPH02299780A JPH02299780A JP12041589A JP12041589A JPH02299780A JP H02299780 A JPH02299780 A JP H02299780A JP 12041589 A JP12041589 A JP 12041589A JP 12041589 A JP12041589 A JP 12041589A JP H02299780 A JPH02299780 A JP H02299780A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- groove
- damping steel
- vicinity
- opening end
- 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
Links
- 238000003466 welding Methods 0.000 title claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000013016 damping Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- 239000011324 bead Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 101150006573 PAN1 gene Proteins 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、制振鋼板の溶接方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of welding damping steel plates.
（従来の技術及び解決すべき課Ｂ）
制振鋼板は、２枚の鋼板の間に合成樹脂部材等の振動吸
収０部材を挟んでサンドイッチ状に形成された合板で、
各種の振動発生源に広く使用されて騒音の発生を抑制す
るようにしている０例えば、エンジンのオイルパンを制
振鋼板により形成してエンジンの振動を吸収し、騒音の
発生を抑制するようにしている。(Prior art and problem to be solved B) A vibration-damping steel plate is a plywood formed in a sandwich shape with a vibration-absorbing member such as a synthetic resin member sandwiched between two steel plates.
It is widely used in various vibration sources to suppress the generation of noise.0 For example, the oil pan of an engine is made of vibration damping steel plate to absorb engine vibration and suppress the generation of noise. ing.
ところで、制振鋼板は、中間層として挟まれている樹脂
部材が溶接時に燃焼してガスを発生するために、極めて
アーク溶接性の悪い材料である。By the way, the damping steel plate is a material with extremely poor arc weldability because the resin member sandwiched therebetween as an intermediate layer burns during welding and generates gas.
しかも、本来二枚板であるためにプレス成形時に外、内
板の伸び量が異なる。このため、第９図に示すようにエ
ンジンのオイルパンＩを制振鋼板２により形成し、バー
リングにより孔２ａの開口端間＆！２ｂを外方に突出さ
せて隅肉開先とし、当該孔２ａにオイルゲージバイブロ
を嵌挿して溶着する場合、図示のように制振鋼板２のゲ
ージバイブロの外面に当接する内板３の先端３ａが外板
４の先端４ａよりも短くなり、この結果、内板３の先端
の溶接が不良となりやすく、当該隅肉開先部分の溶接品
質を確保することが困難である。Moreover, since it is originally made of two plates, the amount of elongation of the outer and inner plates is different during press molding. For this reason, as shown in FIG. 9, the oil pan I of the engine is formed of a damping steel plate 2, and burring is performed between the opening ends of the holes 2a &! 2b is made to protrude outward to form a fillet groove, and when an oil gauge vibro is inserted into the hole 2a and welded, the tip of the inner plate 3 that comes into contact with the outer surface of the gauge vibro of the damping steel plate 2 as shown in the figure. 3a becomes shorter than the tip 4a of the outer plate 4, and as a result, the welding of the tip of the inner plate 3 tends to be defective, making it difficult to ensure the welding quality of the fillet groove.
そこで、オイルパン１とゲージバイブロとの溶接におい
てはグラインダにより外板４の先端４ａを削り取る作業
即ち、グラインダ仕上げを行ない、内、外板３．４の先
端３ａ、４ａを同一面とじて開先面を確保した後ＴＩＧ
溶接等により中間層の樹脂５を燃焼させ、その後Ｃｏ２
溶接により制振ｍ板２の孔２ａの周縁部２ｂ即ち、隅肉
開先とゲージバイブロとを溶接するようにしている。Therefore, when welding the oil pan 1 and the gauge vibro, the tip 4a of the outer plate 4 is ground down using a grinder, that is, the tip 4a of the inner and outer plates 3.4 is finished by grinding, and the tips 3a and 4a of the inner and outer plates 3.4 are ground on the same surface and a bevel is formed. After securing the surface, TIG
The intermediate layer resin 5 is burned by welding, etc., and then Co2
By welding, the peripheral edge 2b of the hole 2a of the damping m-plate 2, that is, the fillet groove and the gauge vibro are welded together.
しかしながら、かかる溶接方法では工数の増加及び工程
の増加を来たし、作業能率が悪いという問題がある。However, such a welding method increases the number of man-hours and processes, and has the problem of poor work efficiency.
本発明は上述の点に鑑みてなされたもので、制振鋼板の
隅肉開先近傍に局部加熱を施して樹脂層を燃焼させ、そ
の後取付部材との溶接を行なうようにしだ制振鋼板の溶
接方法を提供することを目的とする。′
（課題を解決するための手段）
上記目的を達成するために本発明によれば、二枚の鋼板
間に振動吸収部材を介在させて形成した制振鋼板と他の
鋼材とを溶接する制振鋼板の方法において、これら両者
の溶接に先立って前記制振鋼板の開先近傍を当該開先に
沿って付加溶接を施して当該開先近傍の前記振動吸収部
材を燃焼させ、この後両者の溶接を行なうようにしたも
のである。The present invention has been made in view of the above-mentioned points, and involves applying local heating to the vicinity of the fillet groove of a vibration-damping steel plate to burn the resin layer, and then welding the vibration-damping steel plate with a mounting member. The purpose is to provide a welding method. (Means for Solving the Problem) According to the present invention, in order to achieve the above object, a vibration damping steel plate formed by interposing a vibration absorbing member between two steel plates and another steel material are welded together. In the shaking steel plate method, prior to welding these two together, additional welding is performed near the groove of the damping steel plate along the groove to burn out the vibration absorbing member near the groove, and then the vibration absorbing member in the vicinity of the groove is burned. It is designed to perform welding.
（作用）
制振鋼板と他の部材との溶接を行なう前に、制振鋼板の
開先の近傍を当該開先に沿って付加溶接を施して局部加
熱を行なう。この局部加熱により制振鋼板の中間層であ
る樹脂部材等の振動吸収部材を燃焼させてガスを放出さ
せ、炭化させる。次に、当該制振鋼板の開先と他の部材
とを溶接する。(Function) Before welding the damping steel plate and other members, additional welding is performed near the groove of the damping steel plate along the groove to perform local heating. This local heating causes the vibration absorbing member, such as a resin member, which is the intermediate layer of the damping steel plate, to burn, release gas, and carbonize it. Next, the groove of the damping steel plate and other members are welded.
この溶接時に当該開先近傍が加熱されても既に中間層の
振動吸収部材は炭化しており、燃焼することはなく、ガ
スの発生もない。これにより、制振鋼板と他の部材との
溶接が良好に行なわれ、溶接品質が向上する。Even if the vicinity of the groove is heated during this welding, the vibration absorbing member in the intermediate layer has already been carbonized and will not burn and will not generate gas. As a result, the damping steel plate and other members can be welded well, and welding quality can be improved.
（実施例） 以下本発明の一実施例を添付図面に基づいて詳述する。(Example) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第１図は、本発明を適用したエンジンのオイルパンとゲ
ージパイプとの接合部を示し、オイルパン１は、制振鋼
板２により形成されており、当該制振鋼板２は、内板３
と、外板４と、これらの二枚の板の間に介在され振動を
吸収する例えば、樹脂部材により形成された樹脂Ｎ（中
間層）５とによりサンドイッチ状に形成されている。こ
のオイルパンｌの上面片隅にはゲージバイブロを取り付
けるための孔２ａが穿設されており、当該孔２ａの開口
端周縁２ｂは外方に膨出して所謂バーリングとされてい
る。そして、この開口端周縁２ｂは隅肉開先とされてい
る。FIG. 1 shows a joint between an oil pan and a gauge pipe of an engine to which the present invention is applied. The oil pan 1 is formed of a damping steel plate 2, and the damping steel plate 2 is connected to an inner plate 3.
It is formed in a sandwich shape by an outer plate 4, and a resin N (intermediate layer) 5 made of a resin member, for example, which is interposed between these two plates and absorbs vibrations. A hole 2a for attaching a gauge vibro is bored in one corner of the upper surface of the oil pan l, and a peripheral edge 2b of the opening end of the hole 2a bulges outward to form a so-called burring. The opening edge 2b is formed into a fillet groove.
孔２ａの開口端周縁２ｂは、バーリングによる湾曲部分
の外側となる面即ち、ゲージバイブロの外面と当接する
内板３の開口端３ａが湾曲部分の内側となる面即ち、外
板４の開口端４ａよりも僅かに短（なっている、そして
、孔２ａにゲージバイブロの下端を嵌合する。The opening end periphery 2b of the hole 2a is the surface on the outside of the curved portion by burring, that is, the surface where the opening end 3a of the inner plate 3 that contacts the outer surface of the gauge vibro is on the inside of the curved portion, that is, the open end of the outer plate 4. 4a, and fit the lower end of the gauge vibro into the hole 2a.
次に、以下のようにしてオイルパン１の孔２ａの開口端
周縁２ｂ即ち、隅肉開先とゲージバイブロとを溶接する
。Next, the opening end periphery 2b of the hole 2a of the oil pan 1, that is, the fillet groove and the gauge vibro are welded together in the following manner.
先ず、実際の溶接即ち、開口端周縁２ｂとゲージバイブ
ロとの溶接に先立って第１図に示すように溶接トーチ９
の電極の先端を孔２ａの開口端周縁２ｂ即ち、の近傍に
向けて当該部分にＴＩＧ溶接により溶接を行ないビード
（以下付加溶接ビードという）７を形成して局部加熱を
施す。この付加溶接を行なうことにより樹脂層５の孔２
ａの隅肉開先近傍５ａが燃焼し、当該燃焼時に発生する
ガスＧが大気に放出されて当該樹脂Ｎ５の先端部５ａが
炭化する。この付加溶接ビード７は孔２ａの開口端周縁
２ｂ（隅肉開先）の全周に亘って施してもよく、或いは
隅肉開先近傍の樹脂層５ａが完全に燃焼し得る範囲内で
適宜の間隔で施してもよい。First, prior to actual welding, that is, welding between the open end periphery 2b and the gauge vibro, the welding torch 9 is turned on as shown in FIG.
Welding is performed by TIG welding with the tip of the electrode directed toward the opening end periphery 2b of the hole 2a, that is, near the opening end rim 2b of the hole 2a to form a bead (hereinafter referred to as an additional weld bead) 7 and apply local heating. By performing this additional welding, the hole 2 of the resin layer 5 is
The vicinity 5a of the fillet groove of a is burned, and the gas G generated during the combustion is released into the atmosphere, and the tip portion 5a of the resin N5 is carbonized. This additional welding bead 7 may be applied all around the opening edge 2b (fillet groove) of the hole 2a, or it may be applied as appropriate within the range where the resin layer 5a near the fillet groove can be completely burned. It may be applied at intervals of
このようにして孔２ａの隅肉開先近傍の樹脂層５を炭化
させた後、第２図に示すように再び前記ＴＩＧ溶接によ
り当該隅肉開先即ち、開口端周縁２ｂとゲージバイブロ
とを斜線部８で示すように溶接する。この溶接時には、
開口端周縁２ｂ即ち、隅肉開先部分の樹脂層５ａは既に
燃焼してガスを放出して炭化されており、従って、加熱
されてももはやガスを発生することはない。この結果、
バーリングした孔２ａの開口端周縁２ｂとゲージバイブ
ロとの溶接が良好に行なわれ、溶接品質の向上が図られ
る。After carbonizing the resin layer 5 near the fillet groove of the hole 2a in this way, as shown in FIG. Welding is performed as shown by the shaded area 8. During this welding,
The resin layer 5a at the opening end periphery 2b, that is, at the fillet groove portion, has already been burned and released gas and is carbonized, and therefore no longer generates gas even when heated. As a result,
Welding between the open end rim 2b of the burred hole 2a and the gauge vibro is performed well, and welding quality is improved.
次に、本発明による溶接状態を実施例により説明する。Next, welding conditions according to the present invention will be explained using examples.
第３図及び第４図は夫々板厚ｔ ＝ １．６５ ｍｍの
制振鋼板をバーリングして形成した試験材料１０．１１
を示し、第 図の試験材料１０の各寸法は、バーリング
部分の内径ｄ＝１２ｍｍ、高さｈ ＝ ３ ｍｍ＋。Figures 3 and 4 show test materials 10.11 formed by burring damping steel plates with a plate thickness of t = 1.65 mm, respectively.
The dimensions of the test material 10 shown in Figure 1 are as follows: inner diameter of the burring portion d = 12 mm, height h = 3 mm +.
湾曲部の曲率半径ｒ＝２である。また、第４図の試験材
料１１の各寸法は、バーリング部分の基部の外径Ｄ１−
２１１１１１、開先部分の内径り、＝１２１１１ｍ、高
さＨ＝３ｍｍ、 Ｈ’ ＝１ｍｆｆｉ、各湾曲部の曲率
半径Ｒ，＝’ｌ ５１． Ｒ２＝ １５１１１． Ｒ３
＝ １５ｍ鋤である。また、取り付けるべきゲージパイ
プ１２（第５図）は、外径Ｄ＝１２ａ＋＠、肉厚ｔ＝１
−一である。The radius of curvature of the curved portion is r=2. In addition, each dimension of the test material 11 in FIG. 4 is the outer diameter D1 of the base of the burring portion
211111, inner diameter of groove portion = 12111 m, height H = 3 mm, H' = 1 mffi, radius of curvature of each curved part R, ='l 51. R2=15111. R3
= 15m plow. Also, the gauge pipe 12 (Fig. 5) to be attached has an outer diameter D=12a+@ and a wall thickness t=1.
-It is one.
そして、試験材料１０は、第５図に示すように従来と同
様に隅肉開先１０ａとゲージパイプ１２とを斜線部Ａで
示すように溶接する。一方、試験材料１１は、第６図に
示すように本発明を適用して隅肉開先１１ａの近傍の湾
曲部に斜線部Ｂで示すように付加溶接ビードを施し、次
いで、隅肉開先１１ａとケージパイプ１２とを斜線部Ｃ
で示すように溶接する。Then, as shown in FIG. 5, the test material 10 is welded to the fillet groove 10a and the gauge pipe 12 as shown by the hatched area A in the same manner as in the conventional method. On the other hand, the test material 11 was prepared by applying the present invention to the curved portion near the fillet groove 11a as shown in the shaded area B, as shown in FIG. 11a and the cage pipe 12 at the shaded part C.
Weld as shown.
これらの溶接結果を第７図に示す。図において、横軸は
溶接狙い位置（−−）を、縦軸は溶接不良率（％）を示
す。また、溶接狙い位置は、第８図に示すように隅肉開
先の外板４の開口端とゲージパイプ１２の表面との交点
０をＯ１当該交点Ｏから外方（バーリング側）を＋、内
方（ゲージパイプ側）を−とじている。そして、図中・
印は従来の方法による試験材料１０を、Ｏ印は本発明を
適用した試験材料１１を示す、この図から明らかなよう
に本発明方法によれば、何れの溶接狙い位置においても
従来の方法に比して優れ、特に、溶接狙い位置が＋０．
５ ＋ｕ＋の位置においては、不良率が略０に近く、極
めて良好な結果となっている。These welding results are shown in FIG. In the figure, the horizontal axis shows the welding target position (--), and the vertical axis shows the welding failure rate (%). In addition, as shown in FIG. 8, the welding target position is O1, which is the intersection point 0 between the open end of the outer plate 4 of the fillet groove and the surface of the gauge pipe 12; The inside (gauge pipe side) is closed. And in the figure
The mark indicates the test material 10 obtained by the conventional method, and the O mark indicates the test material 11 to which the present invention was applied.As is clear from this figure, according to the method of the present invention, the welding target position is superior to the conventional method at any target welding position. In particular, the welding target position is +0.
At the position of 5+u+, the defective rate is close to 0, which is an extremely good result.
尚、本実施例においては、制振鋼板２をオイルパンに適
用してバーリングにより隅肉開先を形成し、ゲージバイ
ブロと溶接する場合について記述したがこれに限るもの
ではなく、制振鋼板２を平板のまま、他の部材と溶接す
る場合にも適用することができる。In this embodiment, a case has been described in which the damping steel plate 2 is applied to an oil pan, a fillet groove is formed by burring, and the welding is performed with a gauge vibro. However, the present invention is not limited to this. It can also be applied when welding a flat plate with other parts.
（発明の効果）
以上説明したように本発明によれば、二枚の鋼板間に振
動吸収部材を介在させて形成した制振鋼板と他の鋼材と
を溶接する制振鋼板の方法において、これら両者の溶接
に先立って前記制振鋼板の開先近傍を当該開先に沿って
付加溶接を施して当該開先近傍の前記振動吸収部材を燃
焼させ、この後両者の溶接を行なうことにより、前記制
振鋼板の開先面のグラインダ加工等が不要となり、且つ
一種類の溶接方法により溶接が可能となり、工数の低減
を図ることができ、作業能率の向上を図ることが可能と
なるという効果がある。(Effects of the Invention) As explained above, according to the present invention, in a method for welding a damping steel plate formed by interposing a vibration absorbing member between two steel plates and another steel material, Prior to welding the two, additional welding is performed near the groove of the damping steel plate along the groove to burn out the vibration absorbing member near the groove, and then by welding the two, This eliminates the need for grinding the grooved surface of the damping steel plate, and enables welding using a single welding method, reducing man-hours and improving work efficiency. be.
第１図は本発明に係る制振ｍＶｉの溶接方法を適用する
オイルパンとゲージパイプとの溶接部分の隅肉開先近傍
及び当該隅肉開先近傍における付加溶接を示す要部拡大
断面図、第゛２図は第１図の隅肉開先とゲージパイプと
の溶接を示す図、第３図及び第４図は制振鋼板の試験材
料の要部断面図、第５図は従来の溶接方法による第３図
の試験材料とパイプとの溶接部の断面図、第６図は本発
明の溶接方法による第４図の試験材料とパイプとの溶接
部の断面図、第７図は第５図及び第６図の溶接部の溶接
結果を示すグラフ、第８図は溶接狙い位置の説明図、第
９回は従来の溶接方法による制振鋼板の隅肉開先と取付
部材との関係を示す要部断面図である。
１・・・オイルパン、２・・・制振鋼板、３・・・内板
、４・・・外板、５・・・樹脂層、６・・・ゲージパイ
プ、７・・・付加溶接ビード、１０．１１・・・試験材
料。
出願人 三菱自動車工業株式会社
代理人 弁理士 長 門 侃 二
Ｒ３
第５図
第６図FIG. 1 is an enlarged cross-sectional view of essential parts showing the vicinity of a fillet groove of a welded portion between an oil pan and a gauge pipe to which the damping mVi welding method according to the present invention is applied, and additional welding in the vicinity of the fillet groove; Figure 2 is a diagram showing welding between the fillet groove in Figure 1 and the gauge pipe, Figures 3 and 4 are cross-sectional views of main parts of the test material of damping steel plate, and Figure 5 is a diagram showing conventional welding. FIG. 6 is a cross-sectional view of the weld between the test material and pipe shown in FIG. 4 according to the welding method of the present invention, and FIG. Figure 6 is a graph showing the welding result of the welded part, Figure 8 is an explanatory diagram of the welding target position, and Part 9 shows the relationship between the fillet groove of the damping steel plate and the mounting member by the conventional welding method. FIG. DESCRIPTION OF SYMBOLS 1...Oil pan, 2...Vibration damping steel plate, 3...Inner plate, 4...Outer plate, 5...Resin layer, 6...Gauge pipe, 7...Additional weld bead , 10.11...Test material. Applicant Mitsubishi Motors Corporation Agent Patent Attorney Kan Nagato 2R3 Figure 5 Figure 6
Claims (1)
鋼板と他の鋼材とを溶接する制振鋼板の方法において、
これら両者の溶接に先立って前記制振鋼板の開先近傍を
当該開先に沿って付加溶接を施して当該開先近傍の前記
振動吸収部材を燃焼させ、この後両者の溶接を行なうこ
とを特徴とする制振鋼板の溶接方法。In a vibration damping steel plate method in which a damping steel plate formed by interposing a vibration absorbing member between two steel plates and another steel material are welded,
Prior to welding these two together, additional welding is performed near the groove of the damping steel plate along the groove to burn out the vibration absorbing member near the groove, and then welding of the two is performed. A method of welding damping steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12041589A JPH02299780A (en) | 1989-05-16 | 1989-05-16 | Welding method for high damping steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12041589A JPH02299780A (en) | 1989-05-16 | 1989-05-16 | Welding method for high damping steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02299780A true JPH02299780A (en) | 1990-12-12 |
Family
ID=14785653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12041589A Pending JPH02299780A (en) | 1989-05-16 | 1989-05-16 | Welding method for high damping steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02299780A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008039311A (en) * | 2006-08-08 | 2008-02-21 | Showa Denko Kk | Heat pipe type heat exchanger |
| JP2011121117A (en) * | 2009-11-04 | 2011-06-23 | Benteler Automobiltechnik Gmbh | Connection part of hollow member and method of making hollow member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603981A (en) * | 1983-06-11 | 1985-01-10 | Souei Sangyo Kk | Welding method of vibration-damping steel plate |
| JPH01266968A (en) * | 1988-04-20 | 1989-10-24 | Mitsubishi Motors Corp | Method for joining high damping steel plate oil pan accessory |
-
1989
- 1989-05-16 JP JP12041589A patent/JPH02299780A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603981A (en) * | 1983-06-11 | 1985-01-10 | Souei Sangyo Kk | Welding method of vibration-damping steel plate |
| JPH01266968A (en) * | 1988-04-20 | 1989-10-24 | Mitsubishi Motors Corp | Method for joining high damping steel plate oil pan accessory |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008039311A (en) * | 2006-08-08 | 2008-02-21 | Showa Denko Kk | Heat pipe type heat exchanger |
| JP2011121117A (en) * | 2009-11-04 | 2011-06-23 | Benteler Automobiltechnik Gmbh | Connection part of hollow member and method of making hollow member |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3402550B2 (en) | Groove for welded joint | |
| US4500030A (en) | Flange weld technique | |
| JPH02299780A (en) | Welding method for high damping steel sheet | |
| CN1638914A (en) | Laser welded tube fitting structure and gas generator with the tube fitting structure | |
| JPH04238670A (en) | Back bead welding method | |
| JP2855773B2 (en) | gasket | |
| JPH025705A (en) | Method for repairing exhaust valve for internal combustion engine | |
| JPH0244627B2 (en) | DENKIONSUIKITONOKANTAINOSEIZOHOHO | |
| JPH0360874A (en) | Seam welding method | |
| JPS59162318A (en) | Manufacture of exhaust silencer | |
| JP3232917B2 (en) | Steel pipe column with diaphragm | |
| JP2918653B2 (en) | Metal gasket | |
| JPH07178585A (en) | Welding structure of pipe stock and welding method therefor | |
| JPH0113203Y2 (en) | ||
| JPS639482Y2 (en) | ||
| JPH09262689A (en) | Joint welding method | |
| JPS6213466B2 (en) | ||
| JPS6325018Y2 (en) | ||
| JPH03114675A (en) | Joining structure | |
| JPH01122676A (en) | Method for welding to high damping steel plate | |
| JPH03156155A (en) | Gasket | |
| JPH04285230A (en) | Column-beam joint part joining method | |
| JP3784378B2 (en) | Steel pipe column | |
| JPH0893965A (en) | Jig for piping assembling and welding | |
| TWI239276B (en) | Method of welding porous metal material |