JP2019013939A - Welding jig and welding method - Google Patents

Welding jig and welding method Download PDF

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JP2019013939A
JP2019013939A JP2017131594A JP2017131594A JP2019013939A JP 2019013939 A JP2019013939 A JP 2019013939A JP 2017131594 A JP2017131594 A JP 2017131594A JP 2017131594 A JP2017131594 A JP 2017131594A JP 2019013939 A JP2019013939 A JP 2019013939A
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welding
wall member
workpiece
gas
welding jig
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JP7037717B2 (en
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修史 松岡
Shuji Matsuoka
修史 松岡
友洋 杉野
Tomohiro Sugino
友洋 杉野
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IHI Corp
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Abstract

To provide a welding jig and a welding method capable of easily shielding a weld zone with shield gas regardless of a welding range or size of a work-piece even when the work-piece having the weld zone has a curved surface shape.SOLUTION: A welding jig 2 includes: a wall member 21 arranged on a work-piece 1 so as to surround only an outer periphery of a weld zone W; and shield gas supply means 22 for supplying shield gas G to a space surrounded by the wall member 21a. The wall member 21 includes an installation surface 21a following a plane shape of a surface of the work-piece 1.SELECTED DRAWING: Figure 3

Description

本発明は、溶接治具及び溶接方法に関し、特に、溶接部をシールドガスで封止するための溶接治具及び該溶接治具を用いた溶接方法に関する。   The present invention relates to a welding jig and a welding method, and more particularly to a welding jig for sealing a welded portion with a shielding gas and a welding method using the welding jig.

例えば、金属同士を溶接する際、溶接部の酸化や窒化を抑制するため、溶接部をシールドガスで封止した状態を保持することが一般的に行われている(特許文献1、特許文献2等参照)。   For example, when welding metals, it is common practice to maintain a state in which the weld is sealed with a shielding gas in order to suppress oxidation and nitridation of the weld (Patent Document 1, Patent Document 2). Etc.).

例えば、特許文献1には、レーザ照射ヘッドとともに溶接部に沿ってシールドトレーラを移動させることにより、溶接部にシールドガスを充填させた状態で溶接を行う溶接装置が開示されている。また、特許文献2には、溶接部の全体を覆う溶接チャンバーを移動可能に配置し、溶接チャンバー内を減圧環境状態にして溶接を行う溶接装置が開示されている。   For example, Patent Document 1 discloses a welding apparatus that performs welding in a state in which a welding gas is filled in a welding portion by moving a shield trailer along the welding portion together with a laser irradiation head. Patent Document 2 discloses a welding apparatus in which a welding chamber that covers the entire welded portion is movably disposed, and welding is performed in a reduced pressure environment inside the welding chamber.

特開2010−23096号公報JP 2010-23096 A 特開2014−205148号公報JP 2014-205148 A

しかしながら、特許文献1に記載されたシールドトレーラは、溶接部を有するワークが平面形状である場合には使用できるものの、ワークが曲面形状である場合には、シールドトレーラとワークとの間に隙間ができてしまい、溶接部をシールドガスで封止することが困難であるという問題があった。   However, the shield trailer described in Patent Document 1 can be used when the workpiece having the welded portion has a planar shape, but when the workpiece has a curved shape, there is a gap between the shield trailer and the workpiece. As a result, there is a problem that it is difficult to seal the weld with a shielding gas.

また、特許文献2に記載された溶接チャンバーは、溶接部を有するワークが曲面形状である場合にも使用することができるものの、溶接する範囲が大きい場合には溶接チャンバーが大型化してしまい、溶接部を有するワークが小型の場合には溶接チャンバーを設置することが困難であるという問題があった。   Moreover, although the welding chamber described in patent document 2 can be used also when the workpiece | work which has a welding part is a curved surface shape, when the range to weld is large, a welding chamber will enlarge and welding will be carried out. When the work having the portion is small, there is a problem that it is difficult to install the welding chamber.

本発明はかかる問題点に鑑み創案されたものであり、溶接部を有するワークが曲面形状である場合であっても、溶接する範囲やワークの大きさに拘わらず、溶接部をシールドガスで容易に封止することができる、溶接治具及び溶接方法を提供することを目的とする。   The present invention has been devised in view of such problems, and even if the workpiece having a welded portion has a curved surface shape, the welded portion can be easily shielded with a shielding gas regardless of the welding range and the size of the workpiece. It is an object to provide a welding jig and a welding method that can be sealed.

本発明によれば、溶接部の外周のみを囲うようにワーク上に配置される壁部材と、該壁部材によって囲まれた空間にシールドガスを供給するシールドガス供給手段と、を備え、前記壁部材は、前記ワークの表面に密着する設置面を備えている、ことを特徴とする溶接治具が提供される。   According to the present invention, the wall comprises: a wall member disposed on the workpiece so as to surround only the outer periphery of the welded portion; and a shield gas supply means for supplying a shield gas to a space surrounded by the wall member, The member is provided with an installation surface that is in close contact with the surface of the workpiece, and a welding jig is provided.

前記シールドガス供給手段は、前記壁部材の側面から前記空間に前記シールドガスを供給するガス噴出孔を含んでいてもよい。   The shield gas supply means may include a gas ejection hole for supplying the shield gas to the space from a side surface of the wall member.

前記シールドガスは、例えば、空気よりも比重が大きい不活性ガスである。   The shield gas is, for example, an inert gas having a specific gravity greater than that of air.

また、前記溶接治具は、前記溶接部を挟んで前記壁部材と対向するように配置される第二壁部材を含んでいてもよい。   The welding jig may include a second wall member arranged to face the wall member with the welded portion interposed therebetween.

また、本発明によれば、溶接部の外周のみを囲うようにワーク上に配置され、前記ワークの表面に密着する設置面を備えた壁部材を含む溶接治具を用意する第一ステップと、前記溶接治具を前記ワーク上に配置する第二ステップと、前記壁部材によって囲まれた空間にシールドガスを供給する第三ステップと、前記溶接部を前記シールドガスで封止した状態を保持しながら溶接する第四ステップと、を含むことを特徴とする溶接方法が提供される。   Further, according to the present invention, a first step of preparing a welding jig including a wall member provided on a workpiece so as to surround only the outer periphery of the welded portion and having an installation surface that is in close contact with the surface of the workpiece; A second step of placing the welding jig on the workpiece, a third step of supplying a shielding gas to the space surrounded by the wall member, and a state in which the welding portion is sealed with the shielding gas are maintained. And a fourth step of welding while providing a welding method.

上述した本発明に係る溶接治具及び溶接方法によれば、壁部材を有する溶接治具によって溶接部の外周のみを囲い、該壁部材の設置面をワークの表面に密着させたことにより、ワークと壁部材との間の隙間を低減することができ、壁部材によって囲まれた空間にシールドガスを供給することによって、溶接部をシールドガスで封止することができる。   According to the welding jig and the welding method according to the present invention described above, only the outer periphery of the welded portion is surrounded by the welding jig having the wall member, and the installation surface of the wall member is brought into close contact with the surface of the workpiece. The gap between the wall member and the wall member can be reduced, and the welding portion can be sealed with the shield gas by supplying the shield gas to the space surrounded by the wall member.

また、本発明に係る溶接治具及び溶接方法によれば、ワークや溶接部の形状に応じて溶接治具を容易に設計することができ、溶接部を有するワークが曲面形状である場合であっても、溶接する範囲やワークの大きさに拘わらず、溶接部をシールドガスで容易に封止することができる。   In addition, according to the welding jig and the welding method according to the present invention, the welding jig can be easily designed according to the shape of the workpiece and the welded portion, and the workpiece having the welded portion has a curved shape. However, the welded portion can be easily sealed with the shielding gas regardless of the welding range and the size of the workpiece.

溶接部を有するワークの一例を示す斜視図であり、(a)は溶接する部品を分離した状態、(b)は溶接する部品を組み合わせた状態、を示している。It is a perspective view which shows an example of the workpiece | work which has a welding part, (a) has shown the state which isolate | separated the components to weld, (b) has shown the state which combined the components to weld. 本発明の第一実施形態に係る溶接治具を示す図であり、(a)は斜視図、(b)は図2(a)におけるB−B線矢視断面図、を示している。It is a figure which shows the welding jig which concerns on 1st embodiment of this invention, (a) is a perspective view, (b) has shown the BB arrow directional cross-sectional view in Fig.2 (a). 本発明の一実施形態に係る溶接方法を示す図である。It is a figure which shows the welding method which concerns on one Embodiment of this invention. 本発明の第二実施形態に係る溶接治具を示す図である。It is a figure which shows the welding jig which concerns on 2nd embodiment of this invention.

以下、本発明の実施形態について図1(a)〜図4を用いて説明する。ここで、図1は、溶接部を有するワークの一例を示す斜視図であり、(a)は溶接する部品を分離した状態、(b)は溶接する部品を組み合わせた状態、を示している。図2は、本発明の第一実施形態に係る溶接治具を示す図であり、(a)は斜視図、(b)は図2(a)におけるB−B線矢視断面図、を示している。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a perspective view showing an example of a workpiece having a welded portion, where (a) shows a state where parts to be welded are separated, and (b) shows a state where parts to be welded are combined. 2A and 2B are views showing a welding jig according to the first embodiment of the present invention, in which FIG. 2A is a perspective view, and FIG. 2B is a cross-sectional view taken along line B-B in FIG. ing.

本発明の一実施形態に係る溶接方法は、例えば、図1(a)〜図3に示したように、溶接部Wの外周のみを囲うようにワーク1上に配置され、ワーク1の表面に密着する設置面21aを備えた壁部材21を含む溶接治具2を用意する第一ステップと、溶接治具2をワーク1上に配置する第二ステップと、壁部材21によって囲まれた空間にシールドガスGを供給する第三ステップと、溶接部WをシールドガスGで封止した状態を保持しながら溶接する第四ステップと、を含んでいる。   The welding method according to an embodiment of the present invention is arranged on the workpiece 1 so as to surround only the outer periphery of the welded portion W, for example, as shown in FIGS. In a space surrounded by the wall member 21, a first step of preparing the welding jig 2 including the wall member 21 having the installation surface 21 a in close contact, a second step of arranging the welding jig 2 on the workpiece 1, A third step of supplying the shielding gas G and a fourth step of welding while maintaining the state where the welded portion W is sealed with the shielding gas G are included.

ワーク1は、例えば、図1(a)及び図1(b)に示したように、中空部11aを有する本体11と、中空部11aの開口部に装着されて中空部11aを密閉する蓋部材12と、を備えている。溶接部Wは、本体11と蓋部材12との境界線によって構成される。なお、ここでは、ワーク1が半球体形状を有する場合を図示しているが、ワーク1の形状はかかる形状に限定されるものではない。例えば、ワーク1は、凹面、凸面又は凹凸面によって形成される曲面形状を有する板材等であってもよい。   For example, as shown in FIGS. 1A and 1B, the work 1 includes a main body 11 having a hollow portion 11a and a lid member that is attached to the opening of the hollow portion 11a and seals the hollow portion 11a. 12. The welded portion W is constituted by a boundary line between the main body 11 and the lid member 12. In addition, although the case where the workpiece | work 1 has a hemispherical shape is illustrated here, the shape of the workpiece | work 1 is not limited to this shape. For example, the workpiece 1 may be a plate material having a curved surface formed by a concave surface, a convex surface, or an uneven surface.

溶接治具2は、図2(a)及び図2(b)に示したように、溶接部Wの外周のみを囲うようにワーク1上に配置される壁部材21と、壁部材21によって囲まれた空間にシールドガスGを供給するシールドガス供給手段22と、を備え、壁部材21は、ワーク1の表面の面形状に沿った設置面21aを備えている。   As shown in FIGS. 2A and 2B, the welding jig 2 is surrounded by a wall member 21 disposed on the workpiece 1 so as to surround only the outer periphery of the welded portion W, and the wall member 21. And a shield gas supply means 22 for supplying the shield gas G to the space, and the wall member 21 includes an installation surface 21 a along the surface shape of the surface of the workpiece 1.

壁部材21は、溶接部Wの外周を囲い得る環状又は筒状に形成される。ここでは、溶接部Wが円形状であることから、壁部材21をリング形状に形成しているが、かかる形状に限定されるものではない。例えば、壁部材21は、矩形形状や楕円形状等あってもよい。   The wall member 21 is formed in an annular shape or a cylindrical shape that can surround the outer periphery of the welded portion W. Here, since the welded portion W has a circular shape, the wall member 21 is formed in a ring shape, but the shape is not limited thereto. For example, the wall member 21 may be rectangular or elliptical.

また、壁部材21は、金属製であってもよいし、耐熱性のある樹脂製であってもよい。また、壁部材21は、一体成形品であってもよいし、複数の部品を組み付けて形成するモジュール品であってもよい。   The wall member 21 may be made of metal or heat resistant resin. The wall member 21 may be an integrally molded product or a module product formed by assembling a plurality of components.

また、壁部材21の形状を設計する際には、図3に示したように、溶接部Wとの水平距離D及び高さHに留意する必要がある。具体的には、高さHは、ワーク1に溶接治具2を配置した状態で、壁部材21の上端が溶接部Wの位置よりも高い位置となるように設計する必要がある。また、水平距離Dは、溶接時における溶接トーチ3の稼働領域と壁部材21とが干渉しないように設計する必要がある。   Moreover, when designing the shape of the wall member 21, it is necessary to pay attention to the horizontal distance D and the height H from the welded portion W as shown in FIG. Specifically, the height H needs to be designed so that the upper end of the wall member 21 is higher than the position of the welded portion W in a state where the welding jig 2 is disposed on the workpiece 1. Moreover, it is necessary to design the horizontal distance D so that the working region of the welding torch 3 and the wall member 21 do not interfere during welding.

壁部材21の設置面21aは、図3に示したように、ワーク1上の所定の位置に溶接治具2を配置したときに、壁部材21とワーク1との間における隙間を低減することができように設計される。具体的には、設置面21aは、ワーク1を設置する場所におけるワーク1の面形状と一致する形状に形成される。なお、壁部材21とワーク1との隙間は、シールドガスGの供給量よりもシールドガスGの漏れ量が十分に少なくなる範囲内において許容することができる。   As shown in FIG. 3, the installation surface 21 a of the wall member 21 reduces a gap between the wall member 21 and the workpiece 1 when the welding jig 2 is disposed at a predetermined position on the workpiece 1. Designed to be able to. Specifically, the installation surface 21a is formed in a shape that matches the surface shape of the workpiece 1 at the place where the workpiece 1 is installed. The gap between the wall member 21 and the workpiece 1 can be allowed within a range in which the leakage amount of the shielding gas G is sufficiently smaller than the supply amount of the shielding gas G.

また、壁部材21の上端面21bは、例えば、図2(b)に示したように、同一の高さを有する水平面によって構成される。なお、図示しないが、上端面21bは、設置面21aに対して高さHを有する設置面21aと同一の面形状によって構成されていてもよい。要するに、壁部材21は、ワーク1に密着する設置面21a及び所定の高さH以上の高さを有していれば、上端面21bの形状は任意である。   Moreover, the upper end surface 21b of the wall member 21 is comprised by the horizontal surface which has the same height, as shown, for example in FIG.2 (b). In addition, although not shown in figure, the upper end surface 21b may be comprised by the same surface shape as the installation surface 21a which has height H with respect to the installation surface 21a. In short, as long as the wall member 21 has an installation surface 21a that is in close contact with the workpiece 1 and a height that is equal to or higher than a predetermined height H, the shape of the upper end surface 21b is arbitrary.

シールドガス供給手段22は、例えば、図2(a)及び図2(b)に示したように、壁部材21の側面から空間にシールドガスGを供給するガス噴出孔22aと、壁部材21の内部に形成されたマニホールド22bと、マニホールド22bにシールドガスGを供給するガス供給口22cと、ガス供給口22cに接続されるガス供給源22dと、を備えている。   For example, as shown in FIGS. 2A and 2B, the shield gas supply means 22 includes a gas ejection hole 22 a for supplying the shield gas G from the side surface of the wall member 21 to the space, and the wall member 21. A manifold 22b formed inside, a gas supply port 22c for supplying the shield gas G to the manifold 22b, and a gas supply source 22d connected to the gas supply port 22c are provided.

ガス噴出孔22aは、壁部材21の内側面21cに形成されている。また、壁部材21の内部には環状の空間を形成するマニホールド22bが形成されており、ガス噴出孔22aはマニホールド22bと連通するように形成されている。また、ガス供給口22cは、壁部材21の外側面21dにマニホールド22bと連通するように形成されている。ガス供給口22cは、配管又はホースを介してガス供給源22dに接続されている。   The gas ejection hole 22 a is formed on the inner side surface 21 c of the wall member 21. Further, a manifold 22b that forms an annular space is formed inside the wall member 21, and the gas ejection holes 22a are formed so as to communicate with the manifold 22b. The gas supply port 22c is formed on the outer surface 21d of the wall member 21 so as to communicate with the manifold 22b. The gas supply port 22c is connected to a gas supply source 22d via a pipe or a hose.

ガス供給源22dは、例えば、シールドガスGが封入されたガスボンベである。シールドガスGは、溶接時に溶融金属と空気との接触を遮断する不活性ガスであり、溶接部Wの酸化や窒化を抑制する気体である。本実施形態では、溶接部Wは外周のみが溶接治具2によって囲まれており、上方が開放されていることから、シールドガスGは、アルゴンガスや炭酸ガス等のように、空気よりも比重が大きい不活性ガスであることが好ましい。   The gas supply source 22d is, for example, a gas cylinder in which a shield gas G is sealed. The shield gas G is an inert gas that blocks contact between the molten metal and air during welding, and is a gas that suppresses oxidation and nitridation of the weld W. In the present embodiment, since only the outer periphery of the welded portion W is surrounded by the welding jig 2 and the upper part is open, the shield gas G has a specific gravity higher than that of air, such as argon gas or carbon dioxide gas. It is preferable that the inert gas is large.

なお、シールドガス供給手段22は、上述した構成に限定されるものではなく、例えば、ガス噴出孔22a、マニホールド22b及びガス供給口22cを省略し、壁部材21によって囲まれた空間にガス供給源22dから配管やホース等を介して直接的にシールドガスGを供給するようにしてもよい。   The shield gas supply means 22 is not limited to the above-described configuration. For example, the gas injection hole 22a, the manifold 22b, and the gas supply port 22c are omitted, and a gas supply source is provided in a space surrounded by the wall member 21. The shield gas G may be directly supplied from 22d via a pipe or a hose.

ここで、上述した溶接治具2を用いて溶接する場合について、図3を参照しつつ説明する。図3は、本発明の一実施形態に係る溶接方法を示す図である。溶接治具2は、対象の溶接部Wを有するワーク1の表面の形状に合わせて設計され、製作される(第一ステップ)。   Here, the case where it welds using the welding jig 2 mentioned above is demonstrated, referring FIG. FIG. 3 is a diagram showing a welding method according to an embodiment of the present invention. The welding jig 2 is designed and manufactured according to the shape of the surface of the workpiece 1 having the target welded portion W (first step).

次に、ワーク1の表面に溶接治具2を配置し、溶接部Wの外周を囲う(第二ステップ)。このとき、溶接治具2の設置面がワーク1の表面に密着する形状を有していることから、所定の位置に溶接治具2に配置するだけでワーク1と溶接治具2との隙間を低減することができる。また、溶接治具2を固定するために、設置面21aに接着剤を塗布又は貼付するようにしてもよい。また、溶接後にワーク1の表面を機械加工するような場合には、溶接治具2をワーク1にスポット溶接等により固定してもよい。   Next, the welding jig 2 is arranged on the surface of the workpiece 1 and surrounds the outer periphery of the welded portion W (second step). At this time, since the installation surface of the welding jig 2 has a shape that is in close contact with the surface of the workpiece 1, the gap between the workpiece 1 and the welding jig 2 can be simply disposed on the welding jig 2 at a predetermined position. Can be reduced. Further, in order to fix the welding jig 2, an adhesive may be applied or pasted on the installation surface 21a. Further, when machining the surface of the workpiece 1 after welding, the welding jig 2 may be fixed to the workpiece 1 by spot welding or the like.

次に、ガス供給源22dの栓を開封し、壁部材21にシールドガスGを供給する。壁部材21に供給されたシールドガスGは、マニホールド22bを経由してガス噴出孔22aから壁部材21によって囲まれた空間に供給される(第三ステップ)。シールドガスGは、空気よりも比重が大きいことから、壁部材21によって囲まれた空間に滞留し充填される。なお、図3において、シールドガスGが充填された状態を灰色に塗り潰して表示している。   Next, the plug of the gas supply source 22 d is opened, and the shield gas G is supplied to the wall member 21. The shield gas G supplied to the wall member 21 is supplied from the gas ejection hole 22a to the space surrounded by the wall member 21 via the manifold 22b (third step). Since the specific gravity of the shielding gas G is larger than that of air, the shielding gas G stays and fills the space surrounded by the wall member 21. In FIG. 3, the state filled with the shielding gas G is displayed in gray.

次に、溶接部Wを溶接装置で溶接する(第四ステップ)。溶接装置は、例えば、レーザ溶接装置である。レーザ溶接装置は、例えば、レーザビームを生成するレーザ発振器(図示せず)と、レーザビームを集光させて照射する光学系を含む溶接トーチ3(レーザヘッド)と、レーザ発振器からレーザヘッドにレーザビームを搬送する光ファイバ(図示せず)と、を備えている。また、溶接トーチ3(レーザヘッド)は、ロボットアーム等の移動手段(図示せず)に接続されており、任意の位置に移動可能に構成されている。   Next, the welding part W is welded with a welding apparatus (fourth step). The welding device is, for example, a laser welding device. The laser welding apparatus includes, for example, a laser oscillator (not shown) that generates a laser beam, a welding torch 3 (laser head) that includes an optical system that focuses and irradiates the laser beam, and a laser from the laser oscillator to the laser head. And an optical fiber (not shown) for carrying the beam. Further, the welding torch 3 (laser head) is connected to a moving means (not shown) such as a robot arm, and is configured to be movable to an arbitrary position.

かかるレーザ溶接装置は、光学系を埃やスパッタ等から保護するために、溶接トーチ3(レーザヘッド)の先端に配置された保護ウインド31を備えていてもよい。また、レーザ溶接装置は、保護ウインド31をスパッタ等から保護するエアナイフ4を備えていてもよい。エアナイフ4は、保護ウインド31の表面に高圧ガスを噴き出す装置である。   Such a laser welding apparatus may include a protective window 31 disposed at the tip of the welding torch 3 (laser head) in order to protect the optical system from dust, spatter, and the like. In addition, the laser welding apparatus may include an air knife 4 that protects the protective window 31 from sputtering and the like. The air knife 4 is a device that ejects high-pressure gas to the surface of the protective window 31.

なお、レーザ溶接装置及びエアナイフ4は、市販されている装置を任意に選択して利用することができることから、図3では構成を簡略化して図示している。   In addition, since the laser welding apparatus and the air knife 4 can arbitrarily select and use commercially available apparatuses, FIG. 3 shows a simplified configuration.

また、溶接時には、壁部材21によって囲まれた空間にシールドガス供給手段22によりシールドガスGを供給し続けながら溶接することが好ましい。かかる処理によって、溶接部WをシールドガスGで封止した状態を保持することができる。   Further, at the time of welding, it is preferable that welding be performed while the shield gas G is continuously supplied to the space surrounded by the wall member 21 by the shield gas supply means 22. With this process, the welded portion W can be kept sealed with the shield gas G.

上述した本実施形態に係る溶接治具2を用いた溶接方法によれば、壁部材21を有する溶接治具2によって溶接部Wの外周のみを囲い、壁部材21の設置面21aをワーク1の表面に密着させたことにより、ワーク1と壁部材21との間の隙間を低減することができ、壁部材21によって囲まれた空間にシールドガスGを供給することによって、溶接部WをシールドガスGで封止することができる。   According to the welding method using the welding jig 2 according to the present embodiment described above, the welding jig 2 having the wall member 21 surrounds only the outer periphery of the welded portion W, and the installation surface 21a of the wall member 21 is set to the workpiece 1. Since the gap between the workpiece 1 and the wall member 21 can be reduced by being brought into close contact with the surface, the shield gas G is supplied to the space surrounded by the wall member 21 so that the welded portion W is shield gas. It can be sealed with G.

また、本実施形態に係る溶接治具2によれば、ワーク1や溶接部Wの形状に応じて溶接治具2を容易に設計することができ、溶接部Wを有するワーク1が曲面形状である場合であっても、溶接する範囲やワーク1の大きさに拘わらず、溶接部WをシールドガスGで容易に封止することができる。なお、本実施形態に係る溶接治具2は、溶接部Wを有するワーク1が平面形状である場合にも使用することができる。   Moreover, according to the welding jig 2 which concerns on this embodiment, the welding jig 2 can be designed easily according to the shape of the workpiece | work 1 or the welding part W, and the workpiece | work 1 which has the welding part W is curved surface shape. Even in some cases, the welded portion W can be easily sealed with the shielding gas G regardless of the welding range and the size of the workpiece 1. In addition, the welding jig 2 which concerns on this embodiment can be used also when the workpiece | work 1 which has the welding part W is planar shape.

次に、本発明の第二実施形態に係る溶接治具について、図4を参照しつつ説明する。ここで、図4は、本発明の第二実施形態に係る溶接治具を示す図である。なお、上述した第一実施形態に係る溶接治具2と同じ構成部品については、同一の符号を付して重複した説明を省略する。   Next, a welding jig according to a second embodiment of the present invention will be described with reference to FIG. Here, FIG. 4 is a figure which shows the welding jig which concerns on 2nd embodiment of this invention. In addition, about the same component as the welding jig 2 which concerns on 1st embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

図4に示したように、壁部材21を有する溶接治具2をワーク1上に配置したときに、壁部材21によって囲まれた空間におけるワーク1(蓋部材12)の表面が壁部材21の高さHよりも低い場合がある。この場合、シールドガスGを充填する空間が広くなってしまうことから、壁部材21によって囲まれた空間に供給するシールドガスGの使用量が増大したり、シールドガスGを充填するのに時間を要したりすることとなる。   As shown in FIG. 4, when the welding jig 2 having the wall member 21 is arranged on the workpiece 1, the surface of the workpiece 1 (lid member 12) in the space surrounded by the wall member 21 is the wall member 21. It may be lower than the height H. In this case, since the space for filling the shielding gas G becomes wide, the amount of the shielding gas G supplied to the space surrounded by the wall member 21 increases, and it takes time to fill the shielding gas G. It will be necessary.

そこで、第二実施形態に係る溶接治具2では、溶接部Wを挟んで壁部材21と対向するように配置される第二壁部材23を使用している。第二壁部材23は、例えば、ワーク1の表面に密着する設置面23aと、壁部材21の上端面21bよりも高い位置に配置される上端面23bと、を備えている。   Therefore, in the welding jig 2 according to the second embodiment, the second wall member 23 disposed so as to face the wall member 21 with the welded portion W interposed therebetween is used. The second wall member 23 includes, for example, an installation surface 23 a that is in close contact with the surface of the workpiece 1 and an upper end surface 23 b that is disposed at a position higher than the upper end surface 21 b of the wall member 21.

第二壁部材23は、例えば、リング状に形成されるが、矩形形状や楕円形状を有する環状又は筒状に形成されていてもよい。また、第二壁部材23は、中空部を有しないブロック体や板状体であってもよい。また、第二壁部材23は、接着剤やスポット溶接によりワーク1に固定してもよいし、壁部材21と連結させて固定するようにしてもよい。   For example, the second wall member 23 is formed in a ring shape, but may be formed in an annular shape or a cylindrical shape having a rectangular shape or an elliptical shape. The second wall member 23 may be a block body or a plate-like body that does not have a hollow portion. The second wall member 23 may be fixed to the work 1 by an adhesive or spot welding, or may be connected to the wall member 21 and fixed.

かかる第二壁部材23を配置することにより、壁部材21と第二壁部材23との間に溶接部Wの両側を囲う溝形状の空間を形成することができ、シールドガスGを充填する空間の容量を小さくすることができ、シールドガスGの使用量を低減し、シールドガスGの充填時間を短縮することができる。   By disposing the second wall member 23, a groove-shaped space surrounding both sides of the welded portion W can be formed between the wall member 21 and the second wall member 23, and a space filled with the shield gas G. , The amount of the shield gas G used can be reduced, and the filling time of the shield gas G can be shortened.

本発明は、上述した実施形態に限定されず、例えば、レーザ溶接以外の溶接(例えば、アーク溶接等)にも適用することができる等、本発明の趣旨を逸脱しない範囲で種々変更が可能であることは勿論である。   The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention, such as being applicable to welding other than laser welding (for example, arc welding). Of course there is.

1 ワーク
2 溶接治具
3 溶接トーチ
4 エアナイフ
11 本体
11a 中空部
12 蓋部材
21 壁部材
21a 設置面
21b 上端面
21c 内側面
21d 外側面
22 シールドガス供給手段
22a ガス噴出孔
22b マニホールド
22c ガス供給口
22d ガス供給源
23 第二壁部材
23a 設置面
23b 上端面
31 保護ウインド
G シールドガス
W 溶接部
DESCRIPTION OF SYMBOLS 1 Work 2 Welding jig 3 Welding torch 4 Air knife 11 Main body 11a Hollow part 12 Lid member 21 Wall member 21a Installation surface 21b Upper end surface 21c Inner side surface 21d Outer side surface 22 Shield gas supply means 22a Gas ejection hole 22b Manifold 22c Gas supply port 22d Gas supply source 23 Second wall member 23a Installation surface 23b Upper end surface 31 Protective window G Shield gas W Welded part

Claims (5)

溶接部の外周のみを囲うようにワーク上に配置される壁部材と、
該壁部材によって囲まれた空間にシールドガスを供給するシールドガス供給手段と、を備え、
前記壁部材は、前記ワークの表面に密着する設置面を備えている、
ことを特徴とする溶接治具。
A wall member arranged on the work so as to surround only the outer periphery of the weld,
Shielding gas supply means for supplying a shielding gas to the space surrounded by the wall member,
The wall member includes an installation surface that is in close contact with the surface of the workpiece.
A welding jig characterized by that.
前記シールドガス供給手段は、前記壁部材の側面から前記空間に前記シールドガスを供給するガス噴出孔を含む、請求項1に記載の溶接治具。   The welding jig according to claim 1, wherein the shield gas supply means includes a gas ejection hole that supplies the shield gas to the space from a side surface of the wall member. 前記シールドガスは、空気よりも比重が大きい不活性ガスである、請求項1に記載の溶接治具。   The welding jig according to claim 1, wherein the shielding gas is an inert gas having a specific gravity greater than that of air. 前記溶接部を挟んで前記壁部材と対向するように配置される第二壁部材を含む、請求項1に記載の溶接治具。   The welding jig according to claim 1, comprising a second wall member disposed so as to face the wall member with the welded portion interposed therebetween. 溶接部の外周のみを囲うようにワーク上に配置され、前記ワークの表面に密着する設置面を備えた壁部材を含む溶接治具を用意する第一ステップと、
前記溶接治具を前記ワーク上に配置する第二ステップと、
前記壁部材によって囲まれた空間にシールドガスを供給する第三ステップと、
前記溶接部を前記シールドガスで封止した状態を保持しながら溶接する第四ステップと、
を含むことを特徴とする溶接方法。

A first step of preparing a welding jig that includes a wall member that is disposed on the workpiece so as to surround only the outer periphery of the welded portion and has an installation surface that is in close contact with the surface of the workpiece;
A second step of placing the welding jig on the workpiece;
A third step of supplying a shielding gas to the space surrounded by the wall member;
A fourth step of welding while maintaining the state where the weld is sealed with the shield gas;
The welding method characterized by including.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114523193A (en) * 2022-04-24 2022-05-24 中国工程物理研究院材料研究所 Laser strengthening processing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929123U (en) * 1972-06-14 1974-03-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929123U (en) * 1972-06-14 1974-03-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114523193A (en) * 2022-04-24 2022-05-24 中国工程物理研究院材料研究所 Laser strengthening processing device

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