JP2010240672A - Method for welding thin plate - Google Patents

Method for welding thin plate Download PDF

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JP2010240672A
JP2010240672A JP2009089851A JP2009089851A JP2010240672A JP 2010240672 A JP2010240672 A JP 2010240672A JP 2009089851 A JP2009089851 A JP 2009089851A JP 2009089851 A JP2009089851 A JP 2009089851A JP 2010240672 A JP2010240672 A JP 2010240672A
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welding
welding line
thin plate
circular
line
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Hiroshi Narihiro
弘 成廣
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Kajima Corp
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Kajima Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for welding a thin plate by which, when a welding line includes an intersection or a corner for changing welding directions in the middle of the welding line, stress concentration caused by heat shrinkage by welding is prevented in the intersection or the corner, and stress concentration caused by heat shrinkage by welding is also prevented in an end of the welding line in a straight part, and consequently blister starting from such portions is prevented in welding a thin plate. <P>SOLUTION: A circular welding line 7 is formed at a corner 3 present in the middle of the welding line 2 of a thin plate 1 or at an end of the welding line 2 in the straight part 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、薄板の鋼材の溶接方法に関するものである。   The present invention relates to a method for welding thin steel materials.

薄板１の鋼材を溶接する場合、溶接ライン２の態様は、例えば直角に曲がる角部３が途中に存在する場合、溶接ライン２が直線部４のみの場合、図５に示すように４枚の薄板１を突き合わせて直線の溶接ライン２が十字状にクロスし交点５が生じる場合、直線の溶接ライン２がＴ字状に交わり交点６が生じる場合などがある。   When the steel material of the thin plate 1 is welded, for example, when the corner portion 3 that is bent at a right angle is present in the middle, the welding line 2 is only the straight portion 4, and as shown in FIG. When the thin plate 1 is abutted and the straight welding line 2 crosses in a cross shape and an intersection point 5 is generated, the straight welding line 2 intersects in a T shape and the intersection point 6 may be generated.

このように薄板１を溶接するとき、鋼材の剛性が小さいため、溶接ライン２の途中に角部が存在する場合や、直線の溶接ライン２の端部において、溶接による熱収縮が原因の応力集中が生じ（図６、図７において矢印で示した方向）、この点を起点として薄板１に膨れ１０が発生する。   When the thin plate 1 is welded in this way, since the rigidity of the steel material is small, there is a corner portion in the middle of the welding line 2 or stress concentration due to thermal contraction due to welding at the end of the straight welding line 2. (The direction indicated by the arrow in FIGS. 6 and 7), and a bulge 10 is generated in the thin plate 1 starting from this point.

この膨れを防止するため、従来は、例えば建設分野では溶接ラインが角部や交差部で重ならないようスカラップを設けるなどして、溶接ディテールを考慮した設計を行っている。   In order to prevent this swelling, conventionally, in the construction field, for example, a design in which welding details are taken into consideration is provided by providing scallops so that the welding lines do not overlap at corners or intersections.

また、自動車や列車等の薄鋼板の溶接では、溶接による変形を抑えるために、溶接量を低減したスポット溶接、または、摩擦攪拌溶接などを行っている。   Moreover, in welding thin steel plates such as automobiles and trains, spot welding with reduced welding amount or friction stir welding is performed in order to suppress deformation due to welding.

前記従来技術は、当業者間で一般的に行われているものであり、文献公知発明にかかるものではない。   The prior art is generally performed by those skilled in the art, and is not related to a known literature invention.

前記従来技術は、いずれも溶接ライン２の途中に角部が存在する場合や、直線の溶接ライン２の端部において、溶接による熱収縮が原因の応力集中の発生を防止するための手段として、溶接の方法そのものを変形が発生しにくいものに変更したり、スカラップを設けるなど溶接ディテールを考慮した設計を行っており、対象によりそれに適した手段を選択する必要があり、膨れを防止する手段として一般的に採択できるものとして確立された手段は従来存在しなかった。   As for the prior art, as a means for preventing the occurrence of stress concentration due to thermal contraction due to welding in the case where corners are present in the middle of the welding line 2 or at the end of the straight welding line 2, The welding method itself has been changed to a type that does not easily deform, or a design that takes into account welding details, such as the provision of scallops, is necessary. There has been no established means that can be generally adopted.

本発明は前記事情に鑑みてなされたもので、溶接ラインの途中に角部が存在する場合や、直線の溶接ラインの端部において、溶接による熱収縮が原因の応力集中の発生を防止し、この点を起点とする膨れを防止する薄板の溶接方法を提供するものである。   The present invention has been made in view of the above circumstances, in the case where there is a corner in the middle of the welding line, or at the end of a straight welding line, preventing the occurrence of stress concentration due to thermal shrinkage due to welding, The present invention provides a thin plate welding method for preventing blistering starting from this point.

請求項１記載の本発明は、薄板の溶接ライン途中に存在する角部や直線の溶接ラインの端部に、円形の溶接ラインを形成することを要旨とするものである。   The gist of the present invention described in claim 1 is that a circular welding line is formed at a corner portion or an end portion of a straight welding line existing in the middle of a thin plate welding line.

請求項１記載の本発明によれば、溶接ライン途中の角部や直線の溶接ラインの端部を円形の溶接ラインとしたから、この部分が応力集中のポイントとなることがなく、溶接によって生じる膨れの発生を防止できる。   According to the first aspect of the present invention, since the corners in the middle of the welding line and the ends of the straight welding line are formed into a circular welding line, this portion does not become a point of stress concentration and is generated by welding. The occurrence of blistering can be prevented.

請求項２記載の本発明は、円形の溶接ラインは、薄板を円形に切除した後、この切除部を円板で塞ぎ円板周縁を溶接することで形成することを要旨とするものである。   The gist of the present invention described in claim 2 is that the circular welding line is formed by cutting a thin plate into a circular shape, closing the cut portion with a circular plate, and welding the peripheral edge of the circular plate.

請求項２記載の本発明によれば、円形の溶接ラインは、薄板を円形に切除した後、この切除部を円板で塞ぎ円板周縁を溶接することにより行えるから、膨れを防止するための方法としては、溶接ラインの方向変換ですみ、現場で容易に対処できる。   According to the second aspect of the present invention, the circular welding line can be formed by cutting the thin plate into a circular shape and then closing the cut portion with a circular plate to weld the peripheral edge of the circular plate. As a method, it is only necessary to change the direction of the welding line, and it can be easily handled on site.

請求項３記載の本発明は、溶接ラインは、直線の溶接ラインを先行して溶接し、その後に円形の溶接ラインを溶接することを要旨とするものである。   The gist of the present invention described in claim 3 is that the welding line is welded in advance by a straight welding line and then a circular welding line is welded.

請求項３記載の本発明によれば、直線の溶接ラインを先行することで、円形の溶接ラインの溶接が行いやすくなる。   According to this invention of Claim 3, it becomes easy to weld a circular welding line by preceding a straight welding line.

以上述べたように本発明の薄板の溶接方法は、溶接ラインの途中に角部が存在する場合や、直線の溶接ラインの端部において、角部や溶接ラインの端部に円形や円弧状の溶接ラインを設けたから、この箇所での溶接による熱収縮が原因の応力集中の発生を防止でき、この点を起点とする膨れを防止することができるものである。   As described above, the thin plate welding method of the present invention has a circular or arcuate shape at the corner or the end of the welding line when the corner exists in the middle of the welding line or at the end of the straight welding line. Since the welding line is provided, it is possible to prevent the occurrence of stress concentration due to thermal contraction due to welding at this point, and it is possible to prevent blistering starting from this point.

以下、図面について本発明の実施形態を詳細に説明する。図１は本発明の薄板の溶接方法の第１実施形態を示す説明図で、図中、図５に示す従来例と同一の構成要素には同一の参照符号を付してある。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a first embodiment of the thin plate welding method of the present invention. In the figure, the same components as those of the conventional example shown in FIG.

第１実施形態は、２本の直線部４による溶接ライン２、２の端部が直角に突き合わさって角部３が発生している場合で、この角部３の箇所に円形の溶接ライン７を形成する。   1st Embodiment is the case where the edge part of the welding lines 2 and 2 by the two straight parts 4 collides at right angle, and the corner | angular part 3 has generate | occur | produced, The circular welding line 7 is provided in the location of this corner | angular part 3 Form.

円形の溶接ライン７の形成方法は、溶接する対象物である薄板１、１を突合せの角部の箇所で円形に切除し、この切除部を円板８で塞ぎ、この円板８の周縁を薄板１に溶接する。   The circular welding line 7 is formed by cutting out the thin plates 1 and 1 that are objects to be welded into a circular shape at the corners of the butt, closing the cut portion with the disc 8, and surrounding the periphery of the disc 8. Weld to thin plate 1.

そして、薄板１、１を溶接するには、まず、溶接ライン２の直線部４を溶接した後、円板８による円形の溶接ライン７を溶接する。これにより、溶接ライン２の途中に存在する角部３の箇所は、円形の溶接ライン７となるから、この箇所が応力集中のポイントとならず、溶接による熱収縮が原因で生じる膨れの発生を防止できる。   And in order to weld the thin plates 1 and 1, first, after welding the linear part 4 of the welding line 2, the circular welding line 7 by the disc 8 is welded. As a result, the corner portion 3 existing in the middle of the welding line 2 becomes a circular welding line 7, and this portion does not become a point of stress concentration, and the occurrence of swelling caused by thermal contraction due to welding is prevented. Can be prevented.

図２は第２実施形態を示し、溶接ライン２が直線部４のみによる場合で、直線部４の端部に円形の溶接ライン７を形成した。これにより、この端部に溶接による熱収縮による応力が集中することがなく、膨れが発生することもない。   FIG. 2 shows a second embodiment, in which the welding line 2 includes only the straight line portion 4, and a circular welding line 7 is formed at the end of the straight line portion 4. As a result, stress due to heat shrinkage due to welding does not concentrate at the end portion, and swelling does not occur.

図３は第３実施形態を示し、直線部４からなる４本の溶接ライン２が十字状にクロスする場合、交差点を円形の溶接ライン７に形成した。よって、この交差点に溶接による熱収縮による応力が集中することがなく、膨れが発生することもない。   FIG. 3 shows a third embodiment. When the four welding lines 2 including the straight portions 4 cross in a cross shape, the intersection is formed in a circular welding line 7. Therefore, stress due to heat shrinkage due to welding does not concentrate at this intersection, and swelling does not occur.

図４は第４実施形態を示し、直線部４からなる３本の溶接ライン２の端部がＴ字状に突き合わさる場合で、この端部に円形の溶接ライン７を形成した。よって、この端部に溶接による熱収縮による応力が集中することがなく、膨れが発生することもない。   FIG. 4 shows a fourth embodiment, in which the end portions of the three welding lines 2 composed of the straight portions 4 are butted in a T shape, and a circular welding line 7 is formed at the end portions. Therefore, stress due to heat shrinkage due to welding does not concentrate at this end, and swelling does not occur.

本発明の薄板の溶接方法の第１実施形態を示す説明図である。It is explanatory drawing which shows 1st Embodiment of the welding method of the thin plate of this invention. 本発明の薄板の溶接方法の第２実施形態を示す説明図である。It is explanatory drawing which shows 2nd Embodiment of the welding method of the thin plate of this invention. 本発明の薄板の溶接方法の第３実施形態を示す説明図である。It is explanatory drawing which shows 3rd Embodiment of the welding method of the thin plate of this invention. 本発明の薄板の溶接方法の第４実施形態を示す説明図である。It is explanatory drawing which shows 4th Embodiment of the welding method of the thin plate of this invention. 従来の薄板の溶接方法の例を示す説明図である。It is explanatory drawing which shows the example of the welding method of the conventional thin plate. 薄板の溶接により角部に発生する集中応力の説明図である。It is explanatory drawing of the concentrated stress which generate | occur | produces in a corner | angular part by welding of a thin plate. 薄板の溶接により端部に発生する集中応力の説明図である。It is explanatory drawing of the concentrated stress which generate | occur | produces in an edge part by welding of a thin plate.

１ 薄板 ２ 溶接ライン
３ 角部 ４ 直線部
５ 交点 ６ 交点
７ 円形の溶接ライン ８ 円板
１０ 膨れ DESCRIPTION OF SYMBOLS 1 Thin plate 2 Welding line 3 Corner | angular part 4 Straight line part 5 Intersection 6 Intersection 7 Circular welding line 8 Disc 10 Swelling

Claims (3)

薄板の溶接ライン途中に存在する角部や直線の溶接ラインの端部に、円形の溶接ラインを形成することを特徴とする薄板の溶接方法。   A thin plate welding method, wherein a circular welding line is formed at a corner portion or an end portion of a straight welding line existing in the middle of a thin plate welding line. 円形の溶接ラインは、薄板を円形に切除した後、この切除部を円板で塞ぎ円板周縁を溶接することで形成する請求項１記載の薄板の溶接方法。   2. The thin plate welding method according to claim 1, wherein the circular welding line is formed by cutting the thin plate into a circular shape, closing the cut portion with a circular plate, and welding the peripheral edge of the circular plate. 溶接ラインは、直線の溶接ラインを先行して溶接し、その後に円形の溶接ラインを溶接する請求項１または請求項２に記載の薄板の溶接方法。   The thin plate welding method according to claim 1 or 2, wherein the welding line is welded in advance by a straight welding line, and then a circular welding line is welded.
JP2009089851A 2009-04-02 2009-04-02 Method for welding thin plate Pending JP2010240672A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0939829A (en) * 1995-07-28 1997-02-10 Toyota Motor Corp Stress relaxation structure of welded part
JP2007516082A (en) * 2003-07-02 2007-06-21 コミツサリア タ レネルジー アトミーク Component assembly means comprising at least one weld code generated by transparency

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0939829A (en) * 1995-07-28 1997-02-10 Toyota Motor Corp Stress relaxation structure of welded part
JP2007516082A (en) * 2003-07-02 2007-06-21 コミツサリア タ レネルジー アトミーク Component assembly means comprising at least one weld code generated by transparency

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