JP2001030091A - Structure of t-shaped joint with narrow groove, its welding method, and welded structure - Google Patents
Structure of t-shaped joint with narrow groove, its welding method, and welded structureInfo
- Publication number
- JP2001030091A JP2001030091A JP11206334A JP20633499A JP2001030091A JP 2001030091 A JP2001030091 A JP 2001030091A JP 11206334 A JP11206334 A JP 11206334A JP 20633499 A JP20633499 A JP 20633499A JP 2001030091 A JP2001030091 A JP 2001030091A
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- groove
- welding
- joint
- angle
- shape
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、中、厚板を用いた
構造物を形成するための挟開先Ｔ継手の構造およびその
溶接方法ならびに溶接構造物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a T-joint for forming a structure using a medium-thick plate, a welding method thereof, and a welded structure.
【０００２】[0002]
【従来の技術】油圧ショベルなどの建設機械は大型化が
進み、その建設機械のアーム、ブーム、バケットなどの
構造物を構成する鋼材の板厚も厚くなり、その溶接作業
に多大な時間を要するようになってきた。2. Description of the Related Art Construction machines, such as hydraulic shovels, are increasing in size, and the thickness of steel materials constituting structures, such as arms, booms, and buckets, of the construction machines is also increasing, requiring a large amount of time for welding work. It has become.
【０００３】一般に、１０〜８０ｍｍ程度の中、厚板を
Ｔ字形に突き合わせて開先溶接するＴ継手の場合、開先
角が同じであれば、Ｊ形開先とレ形（ただし、部材の両
側にレ形を形成した場合はＫ形となるが、以下、レ形と
して説明する）開先の溶着量にそれほどの差はないの
で、加工の簡単なレ形開先を採用することが多い。In general, in the case of a T-joint in which a thick plate is butt-welded in a T-shape in the range of about 10 to 80 mm, if the groove angle is the same, a J-shaped groove and a L-shaped groove (however, the When a concave shape is formed on both sides, the shape is K. However, it will be described as a rectangular shape hereinafter.) Since there is not much difference in the welding amount of the groove, a concave shape groove that is easy to process is often used. .
【０００４】[0004]
【発明が解決しようとする課題】Ｊ形開先、レ形開先に
おいて、溶着量を少なくして溶接時間を短縮するために
は、開先角を小さくすることが必要になる。しかし、開
先角を小さくすると、ルート部近傍の溶接位置の目視が
困難になり狙い位置を定めるのが困難になる。In the J-shaped groove and the R-shaped groove, it is necessary to reduce the groove angle in order to reduce the welding amount and shorten the welding time. However, when the groove angle is reduced, it becomes difficult to visually check the welding position in the vicinity of the root portion, and it becomes difficult to determine the target position.
【０００５】また、溶接効率の良い炭酸ガス溶接、ＭＩ
Ｇ溶接などの半自動溶接では、溶接ワイヤの巻き癖によ
り溶接トーチから送り出された溶接ワイヤの先端位置が
振れるため、さらに狙い位置を定めることが困難にな
る。[0005] Also, carbon dioxide welding with high welding efficiency, MI
In semi-automatic welding such as G welding, the tip position of the welding wire sent out from the welding torch fluctuates due to the curl of the welding wire, making it more difficult to determine the target position.
【０００６】このため、前記半自動溶接を採用した場
合、図８に示すように、溶接母材１に形成された開先２
内における狙い位置のずれにより、ルート部近傍の溶け
込み不足３、あるいは溶接ビード４の高さと幅の比が大
きくなってなし形割れ５が発生しやすくなるため、レ形
開先では、ある程度の開先幅が必要になり挟開先化が難
しかった。For this reason, when the above-mentioned semi-automatic welding is adopted, as shown in FIG.
Due to the misalignment of the target position in the inside, the lack of penetration 3 near the root, or the ratio of the height to the width of the weld bead 4 increases, and the open crack 5 tends to occur. The width of the tip was required, and it was difficult to make it open.
【０００７】前記の事情に鑑み、本発明の目的は、中、
厚板のＴ継手の挟開先化を可能として溶着量を減らし、
溶接時間を短縮することができるようにした挟開先Ｔ継
手の構造およびその溶接方法ならびに溶接構造を提供す
ることにある。[0007] In view of the above circumstances, an object of the present invention is to
It is possible to reduce the amount of welding by making the T-joint of thick plate
An object of the present invention is to provide a structure of a grooved T-joint capable of shortening a welding time, a welding method thereof, and a welding structure.
【０００８】[0008]
【課題を解決するための手段】前記の目的を達成するた
め、本出願の請求項１に記載の発明は、挟開先Ｔ継手の
構造が、接触もしくは所定のギャップで対向するルート
部につながるＩ形もしくは開先角の小さなＪ形で形成さ
れる第１の開先と、この第１の開先につながり、開先角
が第１の開先の開先角より大きく形成されるレ形の第２
の開先によって構成されている。In order to achieve the above-mentioned object, according to the first aspect of the present invention, the structure of the T-joint is connected to a root portion which is in contact with or is opposed to a predetermined gap. A first groove formed as an I-shape or a J-shape having a small groove angle, and a groove formed to be connected to the first groove and having a groove angle larger than the groove angle of the first groove. Second
Beveled.
【０００９】また、請求項２に記載の発明は、接触もし
くは所定のギャップで対向するルート部につながるＩ形
もしくは開先角の小さなＪ形で形成される第１の開先
と、この第１の開先につながり、開先角が第１の開先の
開先角より大きく形成されるレ形の第２の開先によって
構成される挟開先Ｔ継手の溶接方法であって、前記第１
の開先内をＴＩＧ溶接で溶接し、前記第２の開先内を単
位時間当たりの溶着量が大きい溶接法で溶接するように
した。According to a second aspect of the present invention, there is provided a first groove formed in an I-shape or a J-shape having a small included angle, which is connected to a root portion which is in contact with or at a predetermined gap. And wherein the groove angle is larger than the groove angle of the first groove. 1
Is welded by TIG welding, and the inside of the second groove is welded by a welding method having a large welding amount per unit time.
【００１０】また、請求項３に記載の発明は、請求項２
に記載の発明において、前記第１の開先の初層溶接で、
突き合わされた溶接母材同士を溶融接合するようにし
た。[0010] Further, the invention described in claim 3 is based on claim 2.
In the invention described in the above, in the first layer welding of the first groove,
The butted welding base materials were melt-bonded.
【００１１】また、請求項４に記載の発明は、請求項２
に記載の発明において、前記第１の開先の初層溶接で、
少量の溶加材を加え、突き合わされた母材および溶加材
を溶融接合するようにした。The invention described in claim 4 is the same as the claim 2.
In the invention described in the above, in the first layer welding of the first groove,
A small amount of filler metal was added, and the butted base metal and filler metal were melt-bonded.
【００１２】また、請求項５に記載の発明は、請求項１
に記載の発明において、前記第２の開先内を溶接する
際、少なくともその初層溶接時に、直流のベース電流に
パルス電流を重畳した波形とし、溶滴の移行がスプレー
移行となる領域の溶接電流を用いるようにした。The invention described in claim 5 is the first invention.
In the invention described in the above, when welding the inside of the second groove, at least at the time of the initial layer welding, a waveform in which a pulse current is superimposed on a DC base current, the welding of the region where the transfer of the droplet becomes spray transfer Current was used.
【００１３】さらに、請求項６に記載の発明は、溶接に
より形成される溶接構造物であって、その溶接部を構成
する開先の少なくとも一部に、前記請求項１に記載の挟
開先Ｔ継ぎ手の構造を採用した。Further, the invention according to claim 6 is a welded structure formed by welding, wherein at least a part of the groove constituting the welded portion has the pinch groove according to claim 1. A T-joint structure was adopted.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は、本発明による挟開先Ｔ継
手の構造を示す断面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a structure of a cleave point T-joint according to the present invention.
【００１５】同図において、１は溶接母材。２は開先
で、第１の開先２ａと第２の開先２ｂで構成され、その
底部には、ルート部が形成されている。前記第１の開先
２ａは、開先角度θ１が０〜１０度に形成されている
（なお、開先角度θ１が０度のとき、第１の開先２ａは
Ｉ形の開先となる）。また、開先２ａの幅Ａ（開先角度
θ１が０でない場合には、入り口の幅もしくは平均値）
と深さＢは、ほぼ同程度の寸法とすることができる。In FIG. 1, reference numeral 1 denotes a welding base material. Reference numeral 2 denotes a groove, which is composed of a first groove 2a and a second groove 2b, and has a root at the bottom. The first groove 2a has a groove angle θ1 of 0 to 10 degrees (when the groove angle θ1 is 0 degree, the first groove 2a is an I-shaped groove. ). The width A of the groove 2a (the width of the entrance or the average value when the groove angle θ1 is not 0)
And the depth B can be approximately the same size.
【００１６】また、前記第２の開先２ｂは、開先角度θ
２が１０〜３０度で、常に開先角度θ１より大きな角度
で形成する。The second groove 2b has a groove angle θ.
2 is 10 to 30 degrees and is always formed at an angle larger than the groove angle θ1.
【００１７】図２は、本発明による挟開先Ｔ継手の他の
構造を示す断面図である。FIG. 2 is a sectional view showing another structure of the T-joint according to the present invention.
【００１８】同図において、１は溶接母材。２は開先
で、第１の開先２ａと第２の開先２ｂで構成され、第１
の開先２ａの中央部には、スペーサ６が配置され、ルー
ト部を構成している。In FIG. 1, reference numeral 1 denotes a welding base material. Reference numeral 2 denotes a groove, which comprises a first groove 2a and a second groove 2b.
A spacer 6 is disposed at the center of the groove 2a, and forms a root.
【００１９】図３は、本発明による挟開先Ｔ継手の他の
構造を示す断面図である。FIG. 3 is a sectional view showing another structure of the grooved T-joint according to the present invention.
【００２０】同図において、１は溶接母材。２は開先
で、第１の開先２ａと第２の開先２ｂで構成され、第１
の開先２ａ側の端面には、バッキングプレート７が配置
され、ルート部を構成している。In FIG. 1, reference numeral 1 denotes a welding base material. Reference numeral 2 denotes a groove, which comprises a first groove 2a and a second groove 2b.
A backing plate 7 is arranged on the end face of the groove 2a, and forms a root portion.
【００２１】図４および図５は、本発明による溶接方法
を示すもので、図４は、本発明による溶接方法を示す断
面図、図５は、本発明による溶接方法を示す平面図であ
る。4 and 5 show a welding method according to the present invention. FIG. 4 is a sectional view showing the welding method according to the present invention, and FIG. 5 is a plan view showing the welding method according to the present invention.
【００２２】同図において、１は溶接母材。２は開先
で、たとえば、開先角度１０度、幅４ｍｍ、深さ４ｍｍ
に形成された第１の開先２ａと、開先角２５度で形成さ
れた第２の開先２ｂで構成されている。８は溶接トー
チ。９は先端約２０ｍｍが厚さ約１．６ｍｍの扁平に形
成されたタングステン電極で、溶接トーチ８に支持され
ている。１０は溶接ワイヤである。In FIG. 1, reference numeral 1 denotes a welding base material. 2 is a groove, for example, a groove angle of 10 degrees, a width of 4 mm, and a depth of 4 mm
And a second groove 2b formed at a groove angle of 25 degrees. 8 is a welding torch. Reference numeral 9 denotes a flat tungsten electrode having a tip of about 20 mm and a thickness of about 1.6 mm, which is supported by the welding torch 8. Reference numeral 10 denotes a welding wire.
【００２３】このような構成で、第１の開先２ａ内の初
層溶接は、たとえば、電流値２００（Ａ）、電圧値１０
（Ｖ）、溶接速度１００（ｍｍ／ｍｉｎ）、シールドガ
スＡｒ＋６０％Ｈｅ、ガス流量１５（ｌ／ｍｉｎ）、溶
接ワイヤ１０の送り速度０（ｍｍ／ｍｉｎ）の条件で行
う。With such a configuration, the first layer welding in the first groove 2a is performed, for example, with a current value of 200 (A) and a voltage value of 10 (A).
(V), the welding speed is 100 (mm / min), the shielding gas is Ar + 60% He, the gas flow rate is 15 (l / min), and the feed speed of the welding wire 10 is 0 (mm / min).
【００２４】前記の溶接条件で、溶接母材１のルート部
を溶融して溶接を行う。このとき、ルート部にギャップ
がある場合には、少量の溶接ワイヤ１０を（たとえば、
供給速度１５０〜４００（ｍｍ／ｍｉｎ））供給するよ
うにしても良い。Under the above welding conditions, the root portion of the welding base material 1 is melted and welded. At this time, if there is a gap in the root portion, a small amount of welding wire 10 (for example,
A supply speed of 150 to 400 (mm / min) may be supplied.
【００２５】また、第１の開先２ａ内の２層目以降の溶
接は、たとえば、電流値３００（Ａ）、電圧値１０．５
〜１１（Ｖ）、溶接速度１００（ｍｍ／ｍｉｎ）、シー
ルドガスＡｒ＋６０％Ｈｅ、溶接ワイヤ１０の送り速度
１５００〜２０００（ｍｍ／ｍｉｎ）で溶接トーチ８の
移動方向前方より供給の条件で行う。In the welding of the second and subsequent layers in the first groove 2a, for example, the current value is 300 (A) and the voltage value is 10.5.
-11 (V), welding speed 100 (mm / min), shielding gas Ar + 60% He, feed speed 1500-2000 (mm / min) of the welding wire 10, and the welding torch 8 is supplied from the front in the moving direction.
【００２６】なお、第１の開先２ａの最終層の溶接にお
いては、凹みビードを形成し、第２の開先２ｂの底部を
Ｒ形状にすると、第２の開先２ｂの初層の溶接における
溶け込み不良を発生しにくくすることができる。In the welding of the final layer of the first groove 2a, when a concave bead is formed and the bottom of the second groove 2b is formed in an R shape, the welding of the first layer of the second groove 2b is performed. Can be less likely to cause poor penetration.
【００２７】第２の開先２ｂ内の溶接は、たとえば、Ｍ
ＡＧ溶接で行う。その初層溶接は、たとえば、直流のベ
ース電流に周波数が５０Ｈｚ以上（好ましくは１００Ｈ
ｚ以上）のパルス電流を重畳した平均電流値が３２０
（Ａ）で、溶滴がスプレー移行となる領域で溶接を行
う。The welding in the second groove 2b is, for example, M
Performed by AG welding. In the first layer welding, for example, the frequency is 50 Hz or more (preferably 100 H
z or more) is 320.
In (A), welding is performed in a region where the droplets transfer to a spray.
【００２８】ベース電流に重畳するパルス電流の周波数
を５０Ｈｚ以上とすると、図６に示すように、溶接ワイ
ヤの狙い位置が目標位置からずれても、図７に示すよう
に、５０Ｈｚでは、狙い位置のずれ量が２ｍｍ以上にな
ると若干の溶け込み不足や軽度のアンダーカットなど軽
度の欠陥が発生したが、品質上問題はなかった。また、
パルスの周波数が１００Ｈｚ以上になると、欠陥の発生
は認められなかった。If the frequency of the pulse current superimposed on the base current is 50 Hz or more, as shown in FIG. 6, even if the target position of the welding wire deviates from the target position, as shown in FIG. When the shift amount was 2 mm or more, slight defects such as slight insufficient penetration and slight undercut occurred, but there was no problem in quality. Also,
When the pulse frequency was 100 Hz or higher, no defect was observed.
【００２９】また、第２の開先２ｂの２層目以降の溶接
は、平均電流値が２８０（Ａ）で、溶滴がグロビュール
移行する領域で溶接を行う。The welding of the second and subsequent layers of the second groove 2b is performed in a region where the average current value is 280 (A) and the droplet shifts to the globule.
【００３０】なお、レ形開先で形成される第２の開先２
ｂ内の溶接は、前記ＭＡＧ溶接の外、炭酸ガスアーク溶
接、ＭＩＧ溶接、サブマージ溶接など、ＴＩＧ溶接に比
べ溶着量の大きい溶接法を採用することができる。Note that the second groove 2 formed by the concave groove 2
For the welding in b, a welding method having a larger welding amount than TIG welding, such as carbon dioxide arc welding, MIG welding, or submerged welding, in addition to the MAG welding, can be employed.
【００３１】前記の各工程は、予め溶接線を教示された
自動溶接機を用いて自動溶接することができる。また、
溶接位置の前方にレーザ測長器やＣＣＤカメラなどのセ
ンサを配置し、開先位置を検出しながら溶接するように
しても良い。In each of the above steps, automatic welding can be performed using an automatic welding machine in which a welding line is taught in advance. Also,
A sensor such as a laser measuring device or a CCD camera may be arranged in front of the welding position, and welding may be performed while detecting the groove position.
【００３２】前記のように、中、厚板のＴ継手におい
て、挟開先化を実現し溶接部の溶着量を大幅に減らすこ
とができるので、溶接時間を大幅に短縮することができ
る。また、溶接構造物のコストを低減することができ
る。As described above, in the T-joint of a medium-thick plate, it is possible to reduce the amount of welding at a welded portion by realizing a narrowed groove, so that the welding time can be greatly reduced. Further, the cost of the welded structure can be reduced.
【００３３】また、溶着量を減少させることにより、溶
接母材に対する入熱量を減少させることができるので、
溶接母材の熱歪みを小さくして、溶接部周辺の残留応力
を小さくすることができる。したがって、溶接構造物の
疲労強度を向上させることができる。Further, by reducing the amount of welding, the amount of heat input to the welding base metal can be reduced.
It is possible to reduce the thermal distortion of the welding base metal and reduce the residual stress around the welded portion. Therefore, the fatigue strength of the welded structure can be improved.
【００３４】[0034]
【発明の効果】以上述べたごとく、本発明によれば、挟
開先Ｔ継手の溶接において、溶け込み不良ビード割れ等
の溶接欠陥を発生させることなく、品質の良い溶接を行
うことができる。また、溶接部の溶着量を大幅に減らす
ことができるので、溶接時間を大幅に短縮することがで
きる。また、溶接構造物のコストを低減することができ
る。また、溶接母材の熱歪みを小さくして、溶接部周辺
の残留応力を小さくし、溶接構造物の疲労強度を向上さ
せることができる。As described above, according to the present invention, high-quality welding can be performed without welding defects such as poor penetration bead cracks and the like in the welding of the T-joint. In addition, since the amount of welding at the welded portion can be greatly reduced, the welding time can be significantly reduced. Further, the cost of the welded structure can be reduced. Further, it is possible to reduce the thermal strain of the welding base material, reduce the residual stress around the welded portion, and improve the fatigue strength of the welded structure.
【図１】本発明による挟開先Ｔ継手の構造を示す断面
図。FIG. 1 is a cross-sectional view showing a structure of a clevis T-joint according to the present invention.
【図２】本発明による挟開先Ｔ継手の他の構造を示す断
面図。FIG. 2 is a cross-sectional view showing another structure of the clevis T-joint according to the present invention.
【図３】本発明による挟開先Ｔ継手の他の構造を示す断
面図。FIG. 3 is a cross-sectional view showing another structure of the clevis T-joint according to the present invention.
【図４】本発明による溶接方法を示す断面図。FIG. 4 is a sectional view showing a welding method according to the present invention.
【図５】本発明による溶接方法を示す平面図。FIG. 5 is a plan view showing a welding method according to the present invention.
【図６】溶接時における狙い位置のずれ量を示す断面
図。FIG. 6 is a cross-sectional view showing a shift amount of a target position during welding.
【図７】溶接欠陥の狙い位置のずれ量とパルス電流の周
波数の関係を示す特性図。FIG. 7 is a characteristic diagram showing a relationship between a shift amount of a target position of a welding defect and a frequency of a pulse current.
【図８】挟開先Ｔ継手における問題点を示す断面図。FIG. 8 is a cross-sectional view showing a problem in the clamping T-joint.
１…溶接母材、２…開先、２ａ…第１の開先、２ｂ…第
２の開先、４…溶接ビード、６…スペーサ、７…バッキ
ングプレート、８…溶接トーチ、９…タングステン電
極、１０…溶接ワイヤ。DESCRIPTION OF SYMBOLS 1 ... welding base material, 2 ... groove, 2a ... 1st groove, 2b ... 2nd groove, 4 ... welding bead, 6 ... spacer, 7 ... backing plate, 8 ... welding torch, 9 ... tungsten electrode 10, welding wire.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高谷 透 茨城県土浦市神立町650番地 日立建機 株式会社土浦工場内 (72)発明者 舟本 孝雄 茨城県日立市弁天町三丁目10番２号 日立 協和エンジニアリング 株式会社内 (72)発明者 大貫 仁 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 Ｆターム(参考） 4E001 AA03 BB07 BB08 CA01 CA02 CC04 DC01 DD01 DE04 DF06 EA01 EA09 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Takaya 650, Kandachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. (72) Inventor Takao Funamoto 3- 10-2 Bentencho, Hitachi-shi, Ibaraki Hitachi Kyowa Engineering Co., Ltd. (72) Inventor Jin Onuki 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Research Laboratory, Hitachi, Ltd. F-term (reference) 4E001 AA03 BB07 BB08 CA01 CA02 CC04 DC01 DD01 DE04 DF06 EA01 EA09
Claims (6)
ート部につながるＩ形もしくは開先角の小さなＪ形で形
成される第１の開先と、この第１の開先につながり、開
先角が第１の開先の開先角より大きく形成されるレ形の
第２の開先によって構成される挟開先Ｔ継手の構造。1. A first groove formed in an I-shape or a J-shape with a small included angle which is connected to a root portion facing with a contact or a predetermined gap, and a included angle which is connected to the first groove and is included. Is a grooved T-joint formed by a re-shaped second groove formed to have a groove angle larger than the groove angle of the first groove.
ート部につながるＩ形もしくは開先角の小さなＪ形で形
成される第１の開先と、この第１の開先につながり、開
先角が第１の開先の開先角より大きく形成されるレ形の
第２の開先によって構成される挟開先Ｔ継手の溶接方法
であって、前記第１の開先内をＴＩＧ溶接で溶接し、前
記第２の開先内を単位時間当たりの溶着量の大きい溶接
法で溶接することを特徴とする挟開先Ｔ継手の溶接方
法。2. A first groove formed in an I-shape or a J-shape having a small included angle connected to a root portion which is in contact with or at a predetermined gap, and a groove included in the first groove and connected to the first groove. Is a method of welding a grooved T-joint constituted by a re-shaped second groove formed to be larger than the groove angle of the first groove, wherein the inside of the first groove is formed by TIG welding. A method of welding a grooved T-joint, comprising welding and welding the inside of the second groove with a welding method having a large welding amount per unit time.
れた溶接母材同士を溶融接合することを特徴とする請求
項２に記載の挟開先Ｔ継手の溶接方法。3. The welding method for a T-joint according to claim 2, wherein the butted welding base metals are fusion-bonded to each other by the first layer welding of the first groove.
材を加え、突き合わされた母材および溶加材を溶融接合
することを特徴とする請求項２に記載の挟開先Ｔ継手の
溶接方法。4. The pinch according to claim 2, wherein a small amount of filler metal is added in the first groove welding of the first groove, and the butted base metal and filler metal are joined by fusion. The welding method of the groove T-joint.
もその初層溶接時に、直流のベース電流にパルス電流を
重畳した波形とし、溶滴の移行がスプレー移行となる領
域の溶接電流を用いることを特徴とする請求項１に記載
の挟開先Ｔ継手の溶接方法。5. A welding current in a region where a pulse current is superimposed on a DC base current at least at the time of initial layer welding when welding the inside of the second groove, and a transition of a droplet becomes a spray transition. The method for welding a grooved T-joint according to claim 1, wherein:
て、その溶接部を構成する開先の少なくとも一部に、前
記請求項１に記載の挟開先Ｔ継ぎ手の構造を採用したこ
とを特徴とする溶接構造物。6. A welded structure formed by welding, wherein at least a part of a groove forming the welded portion adopts the structure of the T-joint according to claim 1. Characteristic welded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11206334A JP2001030091A (en) | 1999-07-21 | 1999-07-21 | Structure of t-shaped joint with narrow groove, its welding method, and welded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11206334A JP2001030091A (en) | 1999-07-21 | 1999-07-21 | Structure of t-shaped joint with narrow groove, its welding method, and welded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001030091A true JP2001030091A (en) | 2001-02-06 |
Family
ID=16521590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11206334A Pending JP2001030091A (en) | 1999-07-21 | 1999-07-21 | Structure of t-shaped joint with narrow groove, its welding method, and welded structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001030091A (en) |
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