JPH0515975A - Butt welding method for thin materials to be welded - Google Patents
Butt welding method for thin materials to be weldedInfo
- Publication number
- JPH0515975A JPH0515975A JP19477491A JP19477491A JPH0515975A JP H0515975 A JPH0515975 A JP H0515975A JP 19477491 A JP19477491 A JP 19477491A JP 19477491 A JP19477491 A JP 19477491A JP H0515975 A JPH0515975 A JP H0515975A
- Authority
- JP
- Japan
- Prior art keywords
- welded
- butt
- welding
- butt welding
- thin
- 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.)
- Withdrawn
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は突合せ溶接方法に係り、
特に平板状、円筒状などで薄肉の被溶接材の突合せ溶接
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butt welding method,
In particular, the present invention relates to a butt welding method for a thin workpiece such as a flat plate or a cylinder.
【０００２】[0002]
【従来の技術】平板状、円筒状などで薄肉の被溶接材を
突合せ溶接する場合には、従来より、以下の態様で溶接
施工されている。2. Description of the Related Art Conventionally, when butt-welding a thin material to be welded in a flat plate shape, a cylindrical shape, or the like, welding has been conventionally performed in the following manner.
【０００３】すなわち、円筒状被溶接材の突合せ溶接方
法は、図１及び図２に示すように薄板を円筒状に形成し
た被溶接材１の端部を突合せ、この突合せ部３の裏面に
裏当て金２を当接して溶接が行われている。また、平板
状被溶接材の突合せ溶接方法は、図３及び図４に示すよ
うに平板の被溶接材１の端部を突合せて、この突合せ部
３の裏面に裏当て金２を当接して溶接が行われている。
なお、４は上押え治具、５下押え治具、６は溶接トーチ
である。That is, in the butt welding method for a cylindrical material to be welded, as shown in FIG. 1 and FIG. Welding is performed by abutting the pad 2. Further, the butt welding method for the flat plate-shaped material to be welded is as shown in FIG. 3 and FIG. Welding is taking place.
4 is an upper pressing jig, 5 is a lower pressing jig, and 6 is a welding torch.
【０００４】図５は突合せ部３の拡大図であり、裏当て
金２には、適切な裏ビード形状を得るために溝加工が施
されている。そして、被溶接材１の突合せ部の形状は、
全体的な形状に沿うようにのみ加工されている。FIG. 5 is an enlarged view of the abutting portion 3. The backing plate 2 is grooved to obtain an appropriate back bead shape. And the shape of the butt portion of the material to be welded 1 is
Only processed to conform to the overall shape.
【０００５】[0005]
【発明が解決しようとする課題】そして、このような状
態で突合せ溶接を行った場合、図６に示すような溶接ビ
ードが得られる。しかし、表ビードを削除した場合、突
合せ溶接部は図７に示すような形状になり、引張及び疲
労破壊の発生個所となる裏ビード止端部断面の板厚が大
きくとも母材の板厚分しか望めず、十分な引張、疲労強
度が得られない。特に被溶接部材が薄肉の場合には、溶
接時に熱変形を生じ、図８に示すような突合せ溶接部と
なった場合、表ビードの削除により、裏ビード止端部断
面の板厚が母材部よりも小さくなり(図９)、溶接部の引
張及び疲労強度が大きく減少するという問題があった。When butt welding is performed in such a state, a weld bead as shown in FIG. 6 is obtained. However, when the front bead is removed, the butt weld has a shape as shown in Fig. 7, and even if the back bead toe cross-section where the tensile and fatigue fractures occur is thick, the butt weld has the same thickness as the base metal. However, sufficient tensile strength and fatigue strength cannot be obtained. In particular, when the member to be welded is thin, thermal deformation occurs during welding, resulting in a butt weld as shown in Fig. 8. By removing the front bead, the plate thickness of the cross section of the back bead toe is the base metal. There is a problem that the tensile strength and the fatigue strength of the welded portion are greatly reduced because the welded portion is smaller than the welded portion (FIG. 9).
【０００６】本発明は、上記従来技術の問題点を解決
し、薄肉被溶接材の突合せ溶接において引張強度、疲労
強度などの機械的性能の優れた溶接部が得られる溶接方
法を提供することを目的とするものである。The present invention solves the above-mentioned problems of the prior art and provides a welding method capable of obtaining a welded portion having excellent mechanical properties such as tensile strength and fatigue strength in butt welding of thin materials to be welded. It is intended.
【０００７】[0007]
【課題を解決するための手段】本発明者は、前記課題を
解決するために、薄肉被溶接材の施工条件、特に開先形
状について鋭意研究を重ねた結果、ここに本発明をなし
たものである。In order to solve the above-mentioned problems, the present inventor has made earnest studies on the working conditions of a thin material to be welded, particularly the groove shape, and as a result, the present invention has been made. Is.
【０００８】すなわち、本発明は、裏当て金を使用して
薄肉の被溶接材を突合せ溶接するに際し、被溶接材の突
合せ部先端部分を裏当て金方向に曲げて、突合せ溶接を
行うことを特徴とする薄肉被溶接材の突合せ溶接方法を
要旨とするものである。That is, according to the present invention, when butt-welding a thin material to be welded using a backing metal, the butt welding is performed by bending the tip of the butt portion of the material to be welded toward the backing metal. The gist is a butt welding method of a thin material to be welded, which is a feature.
【０００９】以下に本発明を更に詳述する。The present invention will be described in more detail below.
【００１０】[0010]
【作用】本発明の突合せ溶接方法は、要するに、図１０
に示すように、薄肉被溶接材１の突合せ部３の先端部を
裏当て金２の方向(図示の場合、下方向)に曲げた状態
で、溶接を行うものである。これにより、図１１に示す
ような溶接ビードを持つ突合せ溶接部７が得られる。こ
の場合、表ビードを削除しても、裏ビード止端部断面の
板厚は、母材よりも厚くなっている。また、最初から被
溶接材の突合せ部先端部分を裏ビード側に曲げているた
め、図８に示したような表ビード側への熱変形(板厚を
減らす原因となる)も抑えることができる。したがっ
て、突合せ溶接部の引張及び疲労強度が大きく向上す
る。なお、表ビードを削除しない場合でも、疲労強度に
関してほぼ同様な効果が得られる。The butt welding method of the present invention is basically as shown in FIG.
As shown in, the welding is performed in a state where the tip end of the butt portion 3 of the thin material 1 to be welded is bent in the direction of the backing metal 2 (downward in the case of the drawing). As a result, the butt welded portion 7 having the weld beads as shown in FIG. 11 is obtained. In this case, even if the front bead is removed, the plate thickness of the back bead toe section is thicker than the base material. Further, since the tip end portion of the butt portion of the material to be welded is bent to the back bead side from the beginning, it is possible to suppress thermal deformation to the front bead side (which causes reduction of the plate thickness) as shown in FIG. .. Therefore, the tensile strength and fatigue strength of the butt welded portion are greatly improved. Even when the front beads are not removed, the fatigue strength is almost the same.
【００１１】なお、裏当て金には適切な裏ビード形状を
得るために溝加工が施されるが、溝形状は適宜決められ
る。薄肉被溶接材の突合せ部先端部分の曲げ角度はこの
溝内を臨むような角度であるのが良い。その他の溶接施
工条件は自由癩と同様で良く、特に制限されない。ま
た、本発明において被溶接材の肉厚は、溶接時の熱変形
によって実質的に板厚を減じる程度の板厚を云うが、概
ね３mm以下である。The backing plate is grooved to obtain an appropriate back bead shape, but the groove shape is appropriately determined. The bending angle of the tip of the butting portion of the thin material to be welded is preferably such an angle as to face this groove. Other welding construction conditions may be the same as those of Jiyouji and are not particularly limited. Further, in the present invention, the wall thickness of the material to be welded is a plate thickness that substantially reduces the plate thickness due to thermal deformation during welding, and is generally 3 mm or less.
【００１２】以下に本発明の実施例を示す。Examples of the present invention will be shown below.
【００１３】[0013]
【実施例１】板厚２.３mmのアルミニウム合金Ａ５０８
３−Ｏ材の平板を用いて、図５に示す方法と図１０に示
す方法でそれぞれ突合せ部を形成し、図３及び図４に示
す要領でアーク溶接を実施した。得られた突合せ溶接平
板から図１２及び図１３に示す形状寸法の試験片を切出
し、引張試験及び片振り疲労試験を行った。[Example 1] Aluminum alloy A508 having a plate thickness of 2.3 mm
Using a flat plate of 3-O material, butt portions were formed by the method shown in FIG. 5 and the method shown in FIG. 10, and arc welding was carried out in the manner shown in FIGS. 3 and 4. A test piece having the shape and dimensions shown in FIGS. 12 and 13 was cut out from the obtained butt-welded flat plate, and a tensile test and a swinging fatigue test were performed.
【００１４】その結果、図５の方法で作成した溶接試験
片(従来例)は、引張強さが約２６kgf／mm2で、応力振幅
５kgf／mm2時の疲労寿命が約２×１０5回であった。こ
れに対し、図１０の方法で作成した溶接試験片(本発明
例)は、引張強さが約２９kgf／mm2で、応力振幅５kgf／
mm2時の疲労寿命が約３×１０6回であった。このように
図１０の方法で突合せ溶接を行うことにより、従来の方
法に比べて、溶接部の引張強度、疲労強度が共に大きく
向上した。[0014] As a result, the weld test piece (conventional example) created by the method of FIG. 5, a tensile strength of about 26kgf / mm 2, the stress amplitude 5 kgf / mm 2 o'clock fatigue life of about 2 × 10 5 times Met. On the other hand, the welding test piece (Example of the present invention) prepared by the method of FIG. 10 has a tensile strength of about 29 kgf / mm 2 and a stress amplitude of 5 kgf /
The fatigue life in mm 2 was about 3 × 10 6 times. By performing the butt welding by the method of FIG. 10 as described above, both the tensile strength and the fatigue strength of the welded portion are greatly improved as compared with the conventional method.
【００１５】[0015]
【実施例２】図５に示す方法と図１０に示す方法でそれ
ぞれ突合せ部を形成し、図１及び図２に示す溶接治具を
用いて、圧力容器の胴部の突合せ溶接を行った。作成し
た容器は図１４に示す形状のもので、胴部の外径３１０
mm、胴部板厚２mm、容器全長７００mmである。材料とし
てはアルミニウム合金(Ａ５０８３−Ｏ材)を用いた。Example 2 A butt portion was formed by the method shown in FIG. 5 and the method shown in FIG. 10, and the body portion of the pressure vessel was butt-welded using the welding jig shown in FIGS. The created container has the shape shown in FIG.
mm, body plate thickness 2 mm, total container length 700 mm. An aluminum alloy (A5083-O material) was used as the material.
【００１６】得られた容器に１３kgf／cm2の繰返し圧力
を作用させ、疲労試験を行った。その結果、図５の方法
で作成した容器(従来例)は約３００００回の圧力繰返し
で胴部突合せ部が疲労破壊した。一方、図１０の方法で
作成した容器(本発明例)は約１５００００回の圧力繰返
しで同様に胴部突合せ部が破壊した。このように、被溶
接材の突合せ部の先端を曲げて溶接することにより、そ
の疲労強度を大幅に改善することができる。A fatigue test was conducted by applying a repeating pressure of 13 kgf / cm 2 to the obtained container. As a result, in the container (conventional example) prepared by the method of FIG. 5, the body abutting portion was fatigue-failed after the pressure was repeated about 30,000 times. On the other hand, the container (example of the present invention) produced by the method of FIG. 10 similarly broke the abutting portion of the body portion when the pressure was repeated about 150,000 times. By bending and welding the tips of the abutted portions of the materials to be welded in this manner, the fatigue strength thereof can be greatly improved.
【００１７】[0017]
【発明の効果】以上詳述したように、本発明によれば、
薄肉の被溶接材の突合せ溶接において突合せ部先端部分
を曲げて溶接するので、溶接ビード止端部の板厚減少を
解消でき、引張強度、疲労強度など機械的性能の優れた
溶接部が得られる。As described in detail above, according to the present invention,
In butt welding of thin materials to be welded, since the tip of the butt portion is bent and welded, it is possible to eliminate the reduction in plate thickness at the toe of the weld bead and obtain a weld portion with excellent mechanical performance such as tensile strength and fatigue strength. ..
【図１】従来法による円筒状被溶接材の突合せ溶接を説
明する斜視図である。FIG. 1 is a perspective view illustrating a butt welding of a cylindrical material to be welded by a conventional method.
【図２】従来法による円筒状被溶接材の突合せ溶接を説
明する断面図である。FIG. 2 is a cross-sectional view illustrating butt welding of a cylindrical material to be welded by a conventional method.
【図３】従来法による平板状被溶接材の突合せ溶接を説
明する斜視図である。FIG. 3 is a perspective view illustrating butt welding of flat plate-shaped materials to be welded by a conventional method.
【図４】従来法による平板状被溶接材の突合せ溶接を説
明する断面図である。FIG. 4 is a cross-sectional view illustrating butt welding of flat plate-shaped materials to be welded by a conventional method.
【図５】従来法における被溶接材の突合せ部の形状を示
す断面図である。FIG. 5 is a cross-sectional view showing a shape of a butt portion of a material to be welded in a conventional method.
【図６】従来法で得られる突合せ溶接部(溶接後)の断面
図である。FIG. 6 is a cross-sectional view of a butt weld (after welding) obtained by a conventional method.
【図７】従来法で得られる突合せ溶接部(表ビード削除
後)の断面図である。FIG. 7 is a cross-sectional view of a butt welded portion (after removal of front beads) obtained by a conventional method.
【図８】従来法で得られる薄板被溶接材の突合せ溶接部
(溶接後)の断面図である。FIG. 8: Butt weld of thin plate welded material obtained by conventional method
It is a sectional view (after welding).
【図９】従来法で得られる薄板被溶接材の突合せ溶接部
(表ビード削除後)の断面図である。FIG. 9 Butt weld of thin plate welded material obtained by conventional method
It is sectional drawing (after deletion of a front bead).
【図１０】本発明法における被溶接材の突合せ部の形状
を示す断面図である。FIG. 10 is a cross-sectional view showing a shape of a butt portion of a material to be welded in the method of the present invention.
【図１１】本発明法で得られる突合せ溶接部(溶接後)の
断面図である。FIG. 11 is a cross-sectional view of a butt weld (after welding) obtained by the method of the present invention.
【図１２】実施例で用いた溶接試験片の形状寸法(mm)を
示す平面図である。FIG. 12 is a plan view showing the shape dimensions (mm) of the welding test piece used in the examples.
【図１３】実施例で用いた溶接試験片の形状寸法(mm)を
示す側面図である。FIG. 13 is a side view showing the shape dimensions (mm) of the welding test piece used in the examples.
【図１４】実施例で作成した容器の形状を示す平面図で
ある。FIG. 14 is a plan view showing the shape of the container created in the example.
１ 被溶接材 ２ 裏当て金 ３ 突合せ部 ４ 上押え治具 ５ 下押え治具 ６ 溶接トーチ ７ 突合せ溶接部 1 material to be welded 2 backing metal 3 butt section 4 upper pressing jig 5 lower pressing jig 6 welding torch 7 butt welding section
Claims (1)
合せ溶接するに際し、被溶接材の突合せ部先端部分を裏
当て金方向に曲げて、突合せ溶接を行うことを特徴とす
る薄肉被溶接材の突合せ溶接方法。Claims: 1. When butt-welding a thin material to be welded using a backing metal, butt-welding is performed by bending the tip of the butt portion of the material to be welded toward the backing metal. A method for butt welding thin materials to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19477491A JPH0515975A (en) | 1991-07-08 | 1991-07-08 | Butt welding method for thin materials to be welded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19477491A JPH0515975A (en) | 1991-07-08 | 1991-07-08 | Butt welding method for thin materials to be welded |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0515975A true JPH0515975A (en) | 1993-01-26 |
Family
ID=16330028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19477491A Withdrawn JPH0515975A (en) | 1991-07-08 | 1991-07-08 | Butt welding method for thin materials to be welded |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0515975A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005161378A (en) * | 2003-12-04 | 2005-06-23 | Press Kogyo Co Ltd | Welded portion constitution and welding method |
| CN103978290A (en) * | 2014-05-12 | 2014-08-13 | 西北工业大学 | Joint welding clamp of titanium alloy straight pipe and joint welding method |
| CN113134711A (en) * | 2021-04-30 | 2021-07-20 | 永安市方热锅炉设备有限公司 | Pot body welding method of thin metal gravity type heat pipe boiler |
-
1991
- 1991-07-08 JP JP19477491A patent/JPH0515975A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005161378A (en) * | 2003-12-04 | 2005-06-23 | Press Kogyo Co Ltd | Welded portion constitution and welding method |
| JP4560288B2 (en) * | 2003-12-04 | 2010-10-13 | プレス工業株式会社 | Welding method |
| CN103978290A (en) * | 2014-05-12 | 2014-08-13 | 西北工业大学 | Joint welding clamp of titanium alloy straight pipe and joint welding method |
| CN113134711A (en) * | 2021-04-30 | 2021-07-20 | 永安市方热锅炉设备有限公司 | Pot body welding method of thin metal gravity type heat pipe boiler |
| CN113134711B (en) * | 2021-04-30 | 2022-10-28 | 永安市方热锅炉设备有限公司 | Pot body welding method of thin metal gravity type heat pipe boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |