WO2018042680A1 - Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint - Google Patents

Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint Download PDF

Info

Publication number
WO2018042680A1
WO2018042680A1 PCT/JP2016/079766 JP2016079766W WO2018042680A1 WO 2018042680 A1 WO2018042680 A1 WO 2018042680A1 JP 2016079766 W JP2016079766 W JP 2016079766W WO 2018042680 A1 WO2018042680 A1 WO 2018042680A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
auxiliary member
joining
hole
joining auxiliary
Prior art date
Application number
PCT/JP2016/079766
Other languages
French (fr)
Japanese (ja)
Inventor
励一 鈴木
Original Assignee
株式会社神戸製鋼所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Publication of WO2018042680A1 publication Critical patent/WO2018042680A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/007—Spot arc welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded

Abstract

A different materials welding joint (1) is provided with: an upper plate (10) that is made of an aluminum alloy or a magnesium alloy; and a lower plate (20) that is made of steel and is arc-spot welded to the upper plate (10), wherein the upper plate (10) has a hole (11) that faces a surface superposed on the lower plate (20). The different materials welding joint (1) is further provided with a joining auxiliary member (30) which is made of steel and in which a circular hole part (33) is formed. The joining auxiliary member (30) is arranged on the upper plate (10) so as to set the hole part (33) coaxial to the hole (11) provided to the upper plate (10), the hole part (33) of the joining auxiliary member (30) is filled with a welding metal (40) made of an iron alloy or Ni alloy, and a melting part (W) is formed by the welding metal (40), and portions of the melted lower plate (20) and the joining auxiliary member (30) which have been melted.

Description

異材接合用アークスポット溶接法、接合補助部材、及び、異材溶接継手Arc spot welding method for joining dissimilar materials, joining auxiliary member, and dissimilar material welding joint
　本発明は、異材接合用アークスポット溶接法、接合補助部材、及び、異材溶接継手に関する。 The present invention relates to an arc spot welding method for joining dissimilar materials, a joining auxiliary member, and a dissimilar material welding joint.
　自動車を代表とする輸送機器には、（ａ）有限資源である石油燃料消費、（ｂ）燃焼に伴って発生する地球温暖化ガスであるＣＯ２、（ｃ）走行コストといった各種の抑制を目的として、走行燃費の向上が常に求められている。その手段としては、電気駆動の利用など動力系技術の改善の他に、車体重量の軽量化も改善策の一つである。軽量化には現在の主要材料となっている鋼を、軽量素材であるアルミニウム合金、マグネシウム合金、炭素繊維などに置換する手段がある。しかし、全てをこれら軽量素材に置換するには、高コスト化や強度不足になる、といった課題があり、解決策として鋼と軽量素材を適材適所に組み合わせた、いわゆるマルチマテリアルと呼ばれる設計手法が注目を浴びている。 For transportation equipment such as automobiles, the purpose is (a) consumption of petroleum fuel, which is a finite resource, (b) CO 2 , which is a global warming gas generated by combustion, and (c) travel costs. As a result, improvement in driving fuel consumption is always required. In addition to improving power system technology such as the use of electric drive, reducing the weight of the vehicle body is one of the measures. For weight reduction, there is a means of replacing steel, which is currently the main material, with lightweight materials such as aluminum alloy, magnesium alloy, and carbon fiber. However, there are issues such as high costs and insufficient strength to replace everything with these lightweight materials. As a solution, a so-called multi-material design method that combines steel and lightweight materials in the right place is drawing attention. Have been bathed.
　鋼と上記軽量素材を組み合わせるには、必然的にこれらを接合する箇所が出てくる。鋼同士やアルミニウム合金同士、マグネシウム合金同士では容易である溶接が、異材では極めて困難であることが知られている。この理由として、鋼とアルミニウムあるいはマグネシウムの溶融混合部には極めて脆い性質である金属間化合物（ＩＭＣ）が生成し、引張や衝撃といった外部応力で溶融混合部が容易に破壊してしまうことにある。このため、抵抗スポット溶接法やアーク溶接法といった溶接法が異材接合には採用できず、他の接合法を用いるのが一般的である。鋼と炭素繊維の接合も、後者が金属ではないことから溶接を用いることができない。 In order to combine steel and the above lightweight materials, there will inevitably be places where they are joined. It is known that welding, which is easy with steels, aluminum alloys, and magnesium alloys, is extremely difficult with different materials. The reason for this is that an intermetallic compound (IMC), which is extremely brittle, is formed in the melt-mixed portion of steel and aluminum or magnesium, and the melt-mixed portion is easily broken by an external stress such as tension or impact. . For this reason, welding methods such as resistance spot welding and arc welding cannot be adopted for dissimilar material joining, and other joining methods are generally used. For joining steel and carbon fiber, welding cannot be used because the latter is not a metal.
　従来の異材接合技術の例としては、鋼素材と軽量素材の両方に貫通穴を設けてボルトとナットで上下から拘束する手段があげられる。また、他の例としては、かしめ部材を強力な圧力をかけて片側から挿入し、かしめ効果によって拘束する手段が知られている（例えば、特許文献１参照）。 An example of a conventional dissimilar material joining technique is a method in which through holes are provided in both a steel material and a lightweight material and restrained from above and below with bolts and nuts. As another example, a means is known in which a caulking member is inserted from one side under a strong pressure and restrained by a caulking effect (see, for example, Patent Document 1).
　さらに、他の例としては、アルミ合金素材に鋼製の接合部材をポンチとして押し込むことで穴あけと接合部材を仮拘束し、次に鋼素材と重ね合わせ、上下両方から銅電極にて挟み込んで、圧力と高電流を瞬間的に与えて鋼素材と接合部材を抵抗溶接する手段が提案されている（例えば、特許文献２参照）。 Furthermore, as another example, the steel joint member is pushed into the aluminum alloy material as a punch, and the hole and the joint member are temporarily restrained, then overlapped with the steel material, and sandwiched with both copper electrodes from above and below, Means for resistance-welding a steel material and a joining member by momentarily applying pressure and high current have been proposed (see, for example, Patent Document 2).
　また、他の例としては、摩擦攪拌接合ツールを用いてアルミ合金と鋼の素材同士を直接接合する手段も開発されている。（例えば、特許文献３参照）。 As another example, means for directly joining aluminum alloy and steel materials using a friction stir welding tool has been developed. (For example, refer to Patent Document 3).
日本国特開２００２－１７４２１９号公報Japanese Unexamined Patent Publication No. 2002-174219 日本国特開２００９－２８５６７８号公報Japanese Unexamined Patent Publication No. 2009-285678 日本国特許第５０４４１２８号公報Japanese Patent No. 5044128
　しかしながら、ボルトとナットによる接合法は、鋼素材と軽量素材が閉断面構造を構成するような場合（図２４Ａ参照）、ナットを入れることができず適用できない。また、適用可能な開断面構造の継手の場合（図２４Ｂ、図２４Ｃ参照）でも、ナットを回し入れるのに時間を要し能率が悪いという課題がある。 However, the joining method using bolts and nuts cannot be applied because a steel material and a lightweight material constitute a closed cross-sectional structure (see FIG. 24A), because a nut cannot be inserted. Also, in the case of a joint having an applicable open cross-section structure (see FIGS. 24B and 24C), there is a problem that it takes time to turn the nut and the efficiency is poor.
　また、特許文献１に記載の接合法は、比較的容易な方法ではあるが、鋼の強度が高い場合には挿入できない問題があり、且つ、接合強度は摩擦力とかしめ部材の剛性に依存するので、高い接合強度が得られないという問題がある。また、挿入に際しては表・裏両側から治具で押さえ込む必要があるため、閉断面構造には適用できないという課題もある。 Moreover, although the joining method described in Patent Document 1 is a relatively easy method, there is a problem that it cannot be inserted when the strength of the steel is high, and the joining strength depends on the frictional force and the rigidity of the caulking member. Therefore, there is a problem that high joint strength cannot be obtained. In addition, there is a problem that it cannot be applied to a closed cross-sectional structure because it is necessary to press down from both the front and back sides with a jig when inserting.
　さらに、特許文献２に記載の接合法も、閉断面構造には適用できず、また、抵抗溶接法は設備が非常に高価であるという課題がある。 Furthermore, the joining method described in Patent Document 2 cannot be applied to a closed cross-sectional structure, and the resistance welding method has a problem that the equipment is very expensive.
　特許文献３に記載の接合法は、アルミ合金素材を低温領域で塑性流動させながら鋼素材面に圧力をかけることで、両素材が溶融し合うことがなく、金属間化合物の生成を防止しながら金属結合力が得られるとされ、鋼と炭素繊維も接合可能という研究成果もある。しかしながら、本接合法も閉断面構造には適用できず、また高い圧力を必要とするので機械的に大型となり、高価であるという問題がある。また、接合力としてもそれほど高くならない。 The joining method described in Patent Document 3 applies pressure to the steel material surface while causing the aluminum alloy material to plastically flow in a low temperature region, while preventing both materials from melting and preventing the formation of intermetallic compounds. There is a research result that steel and carbon fiber can be joined, because it is said that metal bond strength is obtained. However, this joining method cannot be applied to a closed cross-sectional structure, and requires a high pressure, so that there is a problem that it is mechanically large and expensive. Also, the bonding force is not so high.
　したがって、既存の異材接合技術は、（ｉ）部材や開先形状が開断面構造に限定される、（ｉｉ）接合強度が低い、（ｉｉｉ）設備コストが高価であるといった一つ以上の問題を持っている。このため、種々の素材を組み合わせたマルチマテリアル設計を普及させるためには、（ｉ’）開断面構造と閉断面構造の両方に適用できる、（ｉｉ’）接合強度が十分に高く、かつ信頼性も高い、（ｉｉｉ’）低コストであるという全ての要素を兼ね備えた、使いやすい新技術が求められている。 Therefore, the existing dissimilar material joining technology has one or more problems such as (i) the member or groove shape is limited to an open cross-sectional structure, (ii) low joint strength, (iii) high equipment cost. have. For this reason, in order to spread multi-material design combining various materials, (i ′) applicable to both open and closed section structures, (ii ′) sufficiently high joint strength and reliability However, there is a need for a new technology that is easy to use and has all the elements of (iii ') low cost.
　本発明は、前述した課題に鑑みてなされたものであり、その目的は、アルミニウム合金（以下「Ａｌ合金」とも言う）もしくはマグネシウム合金（以下、「Ｍｇ合金」とも言う）と鋼の異材を、既に世に普及している安価なアーク溶接設備を用いて、強固かつ信頼性の高い品質で接合でき、かつ開断面構造にも閉断面構造にも制限無く適用できる、異材接合用アークスポット溶接法、接合補助部材、及び、異材溶接継手を提供することにある。 The present invention has been made in view of the above-mentioned problems, and its purpose is to use an aluminum alloy (hereinafter also referred to as “Al alloy”) or a magnesium alloy (hereinafter also referred to as “Mg alloy”) and a dissimilar steel material. Arc spot welding method for dissimilar material joining, which can be applied with strong and reliable quality using low-cost arc welding equipment that is already popular in the world, and can be applied to both open and closed cross-sectional structures without limitation. It is in providing a joining auxiliary member and a dissimilar material welded joint.
　ここで、Ａｌ合金もしくはＭｇ合金と鋼を溶融接合させようとすると、上述したように金属間化合物（ＩＭＣ）の生成が避けられない。一方、鋼同士の溶接は最も高い接合強度と信頼性を示すことは、科学的にも実績的にも自明である。
　そこで、本発明者らは、鋼同士の溶接を結合力として用い、さらに拘束力を利用して異材の接合を達成する手段を考案した。 Here, when it is going to melt-join Al alloy or Mg alloy, and steel, the production | generation of an intermetallic compound (IMC) is unavoidable as mentioned above. On the other hand, it is obvious scientifically and practically that welding between steels shows the highest joint strength and reliability.
Therefore, the present inventors have devised means for achieving the joining of different materials by using welding between steels as a coupling force and further using a binding force.
　従って、本発明の上記目的は、下記の構成により達成される。
（１）　アルミニウム合金もしくはマグネシウム合金製の第１の板と、鋼製の第２の板と、を接合する異材接合用アークスポット溶接法であって、
　前記第１の板に穴を空ける工程と、
　前記第１の板と前記第２の板を重ね合わせる工程と、
　円形の穴部が形成される鋼製の接合補助部材を、該穴部が前記第１の板に設けられた穴と同軸となるように前記第１の板上に配置する工程と、
　以下の（ａ）～（ｄ）のいずれかの手法によって、前記接合補助部材の穴部を溶接金属で充填すると共に、前記第１の板の穴内の前記溶接金属を介して前記第２の板及び前記接合補助部材を溶接する工程と、
を備える異材接合用アークスポット溶接法。
（ａ）鉄合金、または、Ｎｉ合金の前記溶接金属が得られる溶接ワイヤを溶極として用いるガスシールドアーク溶接法。
（ｂ）前記溶接ワイヤを溶極として用いるノンガスアーク溶接法。
（ｃ）前記溶接ワイヤを非溶極フィラーとして用いるガスタングステンアーク溶接法。
（ｄ）前記溶接ワイヤを非溶極フィラーとして用いるプラズマアーク溶接法。
（ｅ）鉄合金、または、Ｎｉ合金の前記溶接金属が得られる被覆アーク溶接棒を溶極として用いる被覆アーク溶接法。
（２）　前記第２の板には、絞り加工により膨出部が形成されており、
　前記重ね合わせ工程において、前記第２の板の膨出部が、前記第１の板の穴内に配置される、（１）に記載の異材接合用アークスポット溶接法。
（３）　前記重ね合わせ工程の前に、前記第１の板と前記第２の板の少なくとも一方の重ね合せ面には、前記穴の周囲に、全周に亘って接着剤を塗布する工程を、さらに備える、（１）に記載の異材接合用アークスポット溶接法。
（４）　前記配置工程において、前記接合補助部材と、該接合補助部材と対向する前記第１の板との間の少なくとも一方の対向面に、接着剤を塗布する、（１）に記載の異材接合用アークスポット溶接法。
（５）　前記配置工程の際、又は、前記充填溶接工程後に、前記接合補助部材と、前記第１の板の表面との境界部に接着剤を塗布する、（１）に記載の異材接合用アークスポット溶接法。
（６）　前記接合補助部材の穴部の直径ＰＳは、前記第１の板の穴の直径ＢＤに対し５０％以上１００％以下である、（１）に記載の異材接合用アークスポット溶接法。
（７）　前記接合補助部材の外形寸法ＰＤは、前記第１の板の穴の直径ＢＤに対し１０５％以上である、（１）に記載の異材接合用アークスポット溶接法。
（８）　前記接合補助部材の厚さＰＨは、前記第１の板の板厚ＢＨの５０％以上１５０％以下である、（１）に記載の異材接合用アークスポット溶接法。
（９）　前記充填溶接工程において、前記接合補助部材の表面上に余盛りが形成され、かつ前記余盛りの直径ＷＤが、前記接合補助部材の穴部の直径ＰＳに対し、１０５％以上となる、（１）に記載の異材接合用アークスポット溶接法。
（１０）　前記第１の板には、複数の前記穴が空けられると共に、前記接合補助部材は、複数の前記穴部を備え、
　前記接合補助部材の前記複数の穴部と、前記第１の板に設けられた前記複数の穴とが同軸上にそれぞれ配置され、
　前記接合補助部材の前記複数の穴部を溶接金属でそれぞれ充填すると共に、前記第２の板及び前記接合補助部材を溶接する、（１）に記載の異材接合用アークスポット溶接法。 Therefore, the above object of the present invention is achieved by the following configuration.
(1) An arc spot welding method for joining different materials to join a first plate made of an aluminum alloy or a magnesium alloy and a second plate made of steel,
Drilling a hole in the first plate;
Superimposing the first plate and the second plate;
Arranging a steel joining auxiliary member in which a circular hole is formed on the first plate such that the hole is coaxial with a hole provided in the first plate;
The hole of the joining auxiliary member is filled with a weld metal by any of the following methods (a) to (d), and the second plate is inserted through the weld metal in the hole of the first plate. And welding the joining auxiliary member;
Arc spot welding method for dissimilar materials joining.
(A) A gas shielded arc welding method using a welding wire from which an iron alloy or Ni alloy weld metal is obtained as a melting electrode.
(B) Non-gas arc welding method using the welding wire as a melting electrode.
(C) Gas tungsten arc welding method using the welding wire as a non-melting electrode filler.
(D) A plasma arc welding method using the welding wire as a non-melting electrode filler.
(E) A coated arc welding method in which a coated arc welding rod from which the weld metal of an iron alloy or Ni alloy is obtained is used as a melting electrode.
(2) The second plate has a bulge formed by drawing,
The arc spot welding method for dissimilar material joining according to (1), wherein, in the overlapping step, the bulging portion of the second plate is disposed in the hole of the first plate.
(3) A step of applying an adhesive over the entire circumference of the at least one overlapping surface of the first plate and the second plate before the overlapping step. The arc spot welding method for joining different materials according to (1), further comprising:
(4) The dissimilar material according to (1), wherein, in the arranging step, an adhesive is applied to at least one opposing surface between the joining auxiliary member and the first plate facing the joining auxiliary member. Arc spot welding method for joining.
(5) For dissimilar material joining according to (1), an adhesive is applied to a boundary portion between the joining auxiliary member and the surface of the first plate during the arranging step or after the filling welding step. Arc spot welding method.
(6) the diameter P S of the hole of the joining auxiliary member, said is 100% or less than 50% relative to the diameter B D of the hole of the first plate, dissimilar metals joint for arc spot welding according to (1) Law.
(7) Dimensions P D of the auxiliary bonding member, wherein at first to the diameter B D of the hole of the plate 105% or more, dissimilar metals joint for arc spot welding method described in (1).
(8) The thickness P H of the auxiliary bonding member, wherein at first 150% or less than 50% of the thickness B H of the plate, dissimilar metals joint for arc spot welding method described in (1).
(9) In the filling welding process, the excess prime on the surface of the bonding auxiliary member is formed, and the diameter W D of the excess prime is to the diameter P S of the hole of the joining auxiliary member, 105% or more The arc spot welding method for joining different materials according to (1).
(10) The first plate is provided with a plurality of holes, and the joining auxiliary member includes the plurality of holes.
The plurality of holes of the joining auxiliary member and the plurality of holes provided in the first plate are arranged coaxially, respectively.
The arc spot welding method for dissimilar material joining according to (1), wherein the plurality of holes of the joining auxiliary member are respectively filled with a weld metal and the second plate and the joining auxiliary member are welded.
（１１）　（１）～（１０）のいずれかに記載の異材接合用アークスポット溶接法に用いられ、
　鋼製で、円形の穴部が形成される、接合補助部材。 (11) Used in the arc spot welding method for joining different materials according to any one of (1) to (10),
A joining auxiliary member made of steel and formed with a circular hole.
（１２）　アルミニウム合金もしくはマグネシウム合金製の第１の板と、該第１の板にアークスポット溶接された、鋼製の第２の板と、を備える異材溶接継手であって、
　前記第１の板は、前記第２の板との重ね合わせ面に臨む穴を有し、
　円形の穴部が形成される鋼製の接合補助部材をさらに備え、
　前記接合補助部材は、前記穴部が前記第１の板に設けられた穴と同軸となるように前記第１の板上に配置され、
　前記接合補助部材の穴部は、鉄合金、または、Ｎｉ合金の溶接金属で充填されると共に、前記溶接金属と、溶融された前記第２の板及び前記接合補助部材の一部とによって溶融部が形成される、異材溶接継手。
（１３）　前記第１の板の穴内には、前記第２の板に形成された膨出部が配置される、（１２）に記載の異材溶接継手。
（１４）　前記第１の板と前記第２の板の少なくとも一方の前記重ね合せ面には、前記穴の周囲に、全周に亘って設けられた接着剤を備える、（１２）に記載の異材溶接継手。
（１５）　前記接合補助部材と、該接合補助部材と対向する前記第１の板との間の少なくとも一方の対向面に設けられた接着剤を備える、（１２）に記載の異材溶接継手。
（１６）　前記接合補助部材と、前記第１の板の表面との境界部に設けられた接着剤を備える、（１２）に記載の異材溶接継手。
（１７）　前記接合補助部材の穴部の直径ＰＳは、前記第１の板の穴の直径ＢＤに対し５０％以上１００％以下である、（１２）に記載の異材溶接継手。
（１８）　前記接合補助部材の外形寸法ＰＤは、前記第１の板の穴の直径ＢＤに対し１０５％以上である、（１２）に記載の異材溶接継手。
（１９）　前記接合補助部材の厚さＰＨは、前記第１の板の板厚ＢＨの５０％以上１５０％以下である、（１２）に記載の異材溶接継手。
（２０）　前記接合補助部材の表面上に余盛りが形成され、かつ前記余盛りの直径ＷＤが、前記接合補助部材の穴部の直径ＰＳに対し、１０５％以上となる、（１２）に記載の異材溶接継手。 (12) A dissimilar weld joint comprising a first plate made of an aluminum alloy or a magnesium alloy, and a second plate made of steel arc-welded to the first plate,
The first plate has a hole facing the overlapping surface with the second plate,
It further comprises a steel joining auxiliary member in which a circular hole is formed,
The joining auxiliary member is disposed on the first plate so that the hole portion is coaxial with a hole provided in the first plate,
The hole portion of the joining auxiliary member is filled with a weld metal of an iron alloy or an Ni alloy, and is melted by the weld metal, the melted second plate, and a part of the joining auxiliary member. Dissimilar material welded joint is formed.
(13) The dissimilar material welded joint according to (12), wherein a bulging portion formed in the second plate is disposed in the hole of the first plate.
(14) The overlapping surface of at least one of the first plate and the second plate is provided with an adhesive provided over the entire circumference around the hole. Dissimilar material welded joint.
(15) The dissimilar material welded joint according to (12), comprising an adhesive provided on at least one facing surface between the joining auxiliary member and the first plate facing the joining auxiliary member.
(16) The dissimilar material welded joint according to (12), comprising an adhesive provided at a boundary portion between the joining auxiliary member and the surface of the first plate.
(17) the diameter P S of the hole of the joining auxiliary member, the relative diameter B D of the hole of the first plate is 100% or less than 50%, dissimilar weld joint according to (12).
(18) Dimensions P D of the joining auxiliary member is 105% or more relative to the diameter B D of the hole of the first plate, dissimilar weld joint according to (12).
(19) Thickness P H of the auxiliary bonding member, the first is less than 150% more than 50% of the thickness B H of the plate, dissimilar weld joint according to (12).
(20) the excess prime on the surface of the bonding auxiliary member is formed, and the diameter W D of the excess prime is to the diameter P S of the hole of the joining auxiliary member becomes 105% or more, (12) The dissimilar material welded joint described in 1.
　本発明によれば、アルミニウム合金もしくはマグネシウム合金と、鋼との異材を、安価なアーク溶接設備を用いて、強固かつ信頼性の高い品質で接合でき、かつ開断面構造にも閉断面構造にも制限無く適用できる。 According to the present invention, a dissimilar material of an aluminum alloy or a magnesium alloy and steel can be joined with an inexpensive arc welding equipment with a strong and reliable quality, and both an open sectional structure and a closed sectional structure can be used. Applicable without limitation.
本発明の一実施形態に係る異材溶接継手の斜視図である。It is a perspective view of a dissimilar material welded joint according to an embodiment of the present invention. 図１ＡのＩ－Ｉ線に沿った異材溶接継手の断面図である。1B is a cross-sectional view of the dissimilar material welded joint taken along line II in FIG. 1A. FIG. 本実施形態の異材接合用アークスポット溶接法の穴開け作業を示す図である。It is a figure which shows the drilling operation | work of the arc spot welding method for dissimilar materials joining of this embodiment. 本実施形態の異材接合用アークスポット溶接法の重ね合わせ作業を示す図である。It is a figure which shows the superimposition operation | work of the arc spot welding method for dissimilar materials joining of this embodiment. 本実施形態の異材接合用アークスポット溶接法の挿入作業を示す図である。It is a figure which shows the insertion operation | work of the arc spot welding method for dissimilar materials joining of this embodiment. 本実施形態の異材接合用アークスポット溶接法の溶接作業を示す図である。It is a figure which shows the welding operation | work of the arc spot welding method for dissimilar materials joining of this embodiment. 接合補助部材の第１変形例の正面図である。It is a front view of the 1st modification of a joining auxiliary member. 接合補助部材の第２変形例の正面図である。It is a front view of the 2nd modification of a joining auxiliary member. 接合補助部材の第３変形例の正面図である。It is a front view of the 3rd modification of a joining auxiliary member. 接合補助部材の第４変形例の正面図である。It is a front view of the 4th modification of a joining auxiliary member. 接合補助部材の第５変形例の正面図である。It is a front view of the 5th modification of a joining auxiliary member. 接合補助部材の第６変形例の正面図である。It is a front view of the 6th modification of a joining auxiliary member. 余盛りが形成されない異材溶接継手を示す断面図である。It is sectional drawing which shows the dissimilar material welded joint in which no surplus is formed. 図４Ａの異材溶接継手に板厚方向（３次元方向）の外部応力が作用した状態を示す断面図である。It is sectional drawing which shows the state which the external stress of the plate | board thickness direction (three-dimensional direction) acted on the dissimilar material welded joint of FIG. 4A. 図１Ｂの異材溶接継手に板厚方向（３次元方向）の外部応力が作用した状態を示す断面図である。It is sectional drawing which shows the state which the external stress of the plate | board thickness direction (three-dimensional direction) acted on the dissimilar material welded joint of FIG. 1B. 溶接金属の溶込みを説明するための異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welded joint for demonstrating penetration of a weld metal. 溶接金属の溶込みを説明するための異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welded joint for demonstrating penetration of a weld metal. アルミ製の上板と鋼製の下板を重ねて貫通溶接した比較例としての異材溶接継手の斜視図である。It is a perspective view of the dissimilar material welding joint as a comparative example which piled up and welded the upper board made from aluminum, and the lower board made from steel. 図７Ａの異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welded joint of FIG. 7A. 図７Ａの異材溶接継手にせん断引張が作用した状態を示す断面図である。FIG. 7B is a cross-sectional view illustrating a state in which shear tension is applied to the dissimilar material welded joint in FIG. 7A. 図８Ａの異材溶接継手を示す斜視図である。It is a perspective view which shows the dissimilar material welded joint of FIG. 8A. 図７Ａの異材溶接継手に上下剥離引張が作用した状態を示す断面図である。It is sectional drawing which shows the state which the up-and-down peeling tension acted on the dissimilar material welded joint of FIG. 7A. 図９Ａの異材溶接継手を示す斜視図である。It is a perspective view which shows the dissimilar material welded joint of FIG. 9A. 穴を有するアルミ製の上板と鋼製の下板を重ねて貫通溶接した比較例としての異材溶接継手の斜視図である。It is a perspective view of the dissimilar material welding joint as a comparative example which piled up and welded the aluminum upper board and steel lower board which have a hole. 図１０Ａの異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welded joint of FIG. 10A. 図１０Ａの異材溶接継手にせん断引張が作用した状態を示す断面図である。FIG. 10B is a cross-sectional view showing a state in which shear tension is applied to the dissimilar material welded joint in FIG. 10A. 図１０Ａの異材溶接継手にせん断引張が作用し、接合部が９０°近くずれた状態を示す斜視図である。It is a perspective view which shows the state which shear tension acted on the dissimilar material welded joint of FIG. 10A, and the junction part shifted | deviated nearly 90 degrees. 図１０Ａの異材溶接継手に上下剥離引張が作用した状態を示す断面図である。It is sectional drawing which shows the state which the up-and-down peeling tension acted on the dissimilar material welded joint of FIG. 10A. 図１２Ａの異材溶接継手を示す斜視図である。It is a perspective view which shows the dissimilar material welded joint of FIG. 12A. 上板と下板との間に空隙が存在するアーク溶接前の状態を示す上板、下板、及び接合補助部材の断面図である。It is sectional drawing of the upper board which shows the state before the arc welding in which a space | gap exists between an upper board and a lower board, a lower board, and a joining auxiliary member. アーク溶接後の状態を熱収縮力と共に示す異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welded joint which shows the state after arc welding with a heat contraction force. 接合補助部材の寸法関係を説明するための上板、下板、及び接合補助部材の断面図である。It is sectional drawing of the upper board, lower board, and joining auxiliary member for demonstrating the dimensional relationship of a joining auxiliary member. 接合補助部材の穴部の直径が小さすぎる異材溶接継手にせん断方向の応力が作用した状態を示す断面図である。It is sectional drawing which shows the state which the stress of the shear direction acted on the dissimilar material welded joint whose diameter of the hole part of a joining auxiliary member is too small. 接合補助部材の穴部の直径が小さすぎる異材溶接継手に上下剥離応力が作用した状態を示す断面図である。It is sectional drawing which shows the state which the up-and-down peeling stress acted on the dissimilar material welded joint whose diameter of the hole part of a joining auxiliary member is too small. 異材接合用アークスポット溶接法の第１変形例を説明するための上板と下板の斜視図である。It is a perspective view of the upper board and lower board for demonstrating the 1st modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第１変形例を説明するための上板と下板の断面図である。It is sectional drawing of the upper board and lower board for demonstrating the 1st modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第２変形例を説明するための上板と下板の斜視図である。It is a perspective view of the upper board and lower board for demonstrating the 2nd modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第２変形例を説明するための上板と下板の断面図である。It is sectional drawing of the upper board and lower board for demonstrating the 2nd modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第３変形例を説明するための上板、下板、及び接合補助部材の斜視図である。It is a perspective view of the upper board, lower board, and joining auxiliary member for demonstrating the 3rd modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第３変形例を説明するための上板、下板、及び接合補助部材の断面図である。It is sectional drawing of the upper board, lower board, and joining auxiliary member for demonstrating the 3rd modification of the arc spot welding method for dissimilar materials joining. 第３変形例において、横向き姿勢でアーク溶接が施されている状態を示す図である。In a 3rd modification, it is a figure which shows the state in which the arc welding is performed in the sideways attitude | position. 異材接合用アークスポット溶接法の第４変形例を説明するための異材溶接継手の斜視図である。It is a perspective view of the dissimilar material welding joint for demonstrating the 4th modification of the arc spot welding method for dissimilar materials joining. 異材接合用アークスポット溶接法の第４変形例を説明するための異材溶接継手の断面図である。It is sectional drawing of the dissimilar material welding joint for demonstrating the 4th modification of the arc spot welding method for dissimilar materials joining. 図１Ａ及び図１Ｂの接合補助部材を示す上面図、側面図、及び下面図である。It is the top view, side view, and bottom view which show the joining auxiliary member of Drawing 1A and Drawing 1B. 接合補助部材の第７変形例を示す上面図、側面図、及び下面図である。It is the top view, side view, and bottom view which show the 7th modification of a joining auxiliary member. 接合補助部材の第８変形例を示す上面図、側面図、及び下面図である。It is the top view, side view, and bottom view which show the 8th modification of a joining auxiliary member. 異材接合用アークスポット溶接法、及び異材溶接継手の第５変形例を説明するための断面図である。It is sectional drawing for demonstrating the 5th modification of the arc spot welding method for different material joining, and a different material welded joint. 図２２の下板に膨出部を絞り加工する前の状態を示す図である。It is a figure which shows the state before drawing a bulging part to the lower board of FIG. 図２２の下下板に膨出部が絞り加工された後の状態を示す図である。It is a figure which shows the state after the bulging part was drawn by the lower lower board of FIG. 本実施形態の異材溶接継手が適用された閉断面構造を示す斜視図である。It is a perspective view which shows the closed cross-section structure to which the dissimilar material welded joint of this embodiment was applied. 本実施形態の異材溶接継手が適用された、Ｌ字板と平板による開断面構造を示す斜視図である。It is a perspective view which shows the open cross-section structure by the L-shaped board and the flat plate to which the dissimilar material welded joint of this embodiment was applied. 本実施形態の異材溶接継手が適用された、２枚の平板による開断面構造を示す斜視図である。It is a perspective view showing the open section structure by two flat plates to which the dissimilar material welded joint of this embodiment was applied. 複数の穴部を有する接合補助部材を使用しつつ、本実施形態の異材溶接継手が適用された、閉断面構造を示す斜視図である。It is a perspective view which shows the closed cross-section structure to which the dissimilar material welded joint of this embodiment was applied, using the joining auxiliary member which has a some hole part. 複数の穴部を有する接合補助部材を使用しつつ、本実施形態の異材溶接継手が適用された、Ｌ字板と平板による開断面構造を示す斜視図である。It is a perspective view which shows the open cross-section structure by an L-shaped board and a flat plate to which the dissimilar material welded joint of this embodiment was applied, using the joining auxiliary member which has a some hole part. 複数の穴部を有する接合補助部材を使用しつつ、本実施形態の異材溶接継手が適用された、２枚の平板による開断面構造を示す斜視図である。It is a perspective view which shows the open cross-section structure by two flat plates to which the dissimilar material welded joint of this embodiment was applied, using the joining auxiliary member which has a some hole part. 複数の穴部を有する接合補助部材の一例を示す正面図及び断面図である。It is the front view and sectional drawing which show an example of the joining auxiliary member which has a some hole part. 複数の穴部を有する接合補助部材の他の例を示す正面図及び断面図である。It is the front view and sectional drawing which show the other example of the joining auxiliary member which has a some hole part. 複数の穴部を有する接合補助部材のさらに他の例を示す正面図及び断面図である。It is the front view and sectional drawing which show the further another example of the joining auxiliary member which has a some hole part.
　以下、本発明の一実施形態に係る異材接合用アークスポット溶接法、接合補助部材、及び、異材溶接継手を図面に基づいて詳細に説明する。 Hereinafter, an arc spot welding method for joining dissimilar materials, a joining auxiliary member, and a dissimilar material welding joint according to an embodiment of the present invention will be described in detail with reference to the drawings.
　本実施形態の異材接合用アークスポット溶接法は、互いに重ね合わせされる、アルミニウム合金もしくはマグネシウム合金製の上板１０（第１の板）と、鋼製の下板２０（第２の板）とを、鋼製の接合補助部材３０を介して、後述するアークスポット溶接法によって接合することで、図１Ａ及び図１Ｂに示すような異材溶接継手１を得るものである。 The arc spot welding method for joining dissimilar materials of the present embodiment includes an upper plate 10 (first plate) made of aluminum alloy or magnesium alloy and a lower plate 20 (second plate) made of steel, which are superposed on each other. Are joined by an arc spot welding method, which will be described later, through a steel joining auxiliary member 30 to obtain a dissimilar material welded joint 1 as shown in FIGS. 1A and 1B.
　上板１０には、板厚方向に貫通して、下板２０の重ね合わせ面に臨む円形の穴１１が設けられている。 The upper plate 10 is provided with a circular hole 11 that penetrates in the plate thickness direction and faces the overlapping surface of the lower plate 20.
　接合補助部材３０は、円形の穴部３３を有して円環状に形成されている。接合補助部材３０は、穴部３３が上板１０に設けられた穴１１と同軸となるように上板１０上に配置されている。なお、接合補助部材３０の外形形状は、図１Ａに示すような円形に限定されず、任意の形状とすることができる。例えば、図３Ａに示す楕円や、図３Ｂ～図３Ｆに示す四角形以上の多角形でもよい。また、図３Ｃや図３Ｆに示すように、多角形の角部を丸くしてもよい。さらに、これらの非円形の接合補助部材３０では、後述する外径寸法ＰＤは、最も短い対向面間距離で規定される。 The joining auxiliary member 30 has a circular hole 33 and is formed in an annular shape. The joining auxiliary member 30 is disposed on the upper plate 10 so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10. In addition, the external shape of the joining auxiliary member 30 is not limited to a circular shape as illustrated in FIG. 1A, and can be an arbitrary shape. For example, it may be an ellipse shown in FIG. 3A or a polygon more than a quadrangle shown in FIGS. 3B to 3F. Further, as shown in FIGS. 3C and 3F, the corners of the polygon may be rounded. Furthermore, in these non-circular auxiliary bonding member 30, the outer diameter P D to be described later, it is defined by the distance between the shortest facing surface.
　さらに、接合補助部材３０の穴部３３には、アークスポット溶接によってフィラー材（溶接材料）が溶融した、鉄合金、または、Ｎｉ合金の溶接金属４０が充填されると共に、溶接金属４０と、溶融された下板２０及び接合補助部材３０の一部とによって溶融部Ｗが形成される。したがって、溶融部Ｗは、上板１０の穴１１内にも配置されて、接合補助部材３０と下板２０とを溶接しており、これによって、上板１０と下板２０とが接合される。 Furthermore, the hole 33 of the joining auxiliary member 30 is filled with a weld metal 40 of an iron alloy or Ni alloy in which a filler material (welding material) is melted by arc spot welding, and is melted with the weld metal 40. A melted portion W is formed by the lower plate 20 and a part of the joining auxiliary member 30. Therefore, the fusion | melting part W is also arrange | positioned also in the hole 11 of the upper board 10, and has welded the joining auxiliary member 30 and the lower board 20, and, thereby, the upper board 10 and the lower board 20 are joined. .
　以下、異材溶接継手１を構成する異材接合用アークスポット溶接法について、図２Ａ～図２Ｄを参照して説明する。
　まず、図２Ａに示すように、上板１０に穴１１を空ける穴開け作業を行う（ステップＳ１）。次に、図２Ｂに示すように、上板１０と下板２０を重ね合わせる重ね合わせ作業を行う（ステップＳ２）。さらに、図２Ｃに示すように、接合補助部材３０を、穴部３３が上板１０に設けられた穴１１と同軸となるように上板１０上に配置する（ステップＳ３）。そして、図２Ｄに示すように、以下に詳述する（ａ）溶極式ガスシールドアーク溶接法、（ｂ）ノンガスアーク溶接法、（ｃ）ガスタングステンアーク溶接法、（ｄ）プラズマアーク溶接法、（ｅ）被覆アーク溶接法のいずれかのアーク溶接作業を行うことで、上板１０と下板２０とを接合する（ステップＳ４）。なお、図２Ｄは、（ａ）溶極式ガスシールドアーク溶接法を用いてアーク溶接作業が行われた場合を示している。 Hereinafter, the arc spot welding method for dissimilar material joining that constitutes the dissimilar material welded joint 1 will be described with reference to FIGS. 2A to 2D.
First, as shown in FIG. 2A, a hole making operation for making a hole 11 in the upper plate 10 is performed (step S1). Next, as shown in FIG. 2B, a superposition operation for superposing the upper plate 10 and the lower plate 20 is performed (step S2). Further, as shown in FIG. 2C, the joining auxiliary member 30 is arranged on the upper plate 10 so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10 (step S3). Then, as shown in FIG. 2D, (a) a molten metal gas shielded arc welding method, (b) a non-gas arc welding method, (c) a gas tungsten arc welding method, and (d) a plasma arc welding method, which will be described in detail below. (E) The upper plate 10 and the lower plate 20 are joined by performing any arc welding operation of the covered arc welding method (step S4). FIG. 2D shows a case where (a) arc welding work is performed using the melting electrode type gas shielded arc welding method.
　ステップＳ１の穴開け作業の具体的な手法としては、ａ）電動ドリルやボール盤といった回転工具を用いた切削、ｂ）ポンチを用いた打抜き、ｃ）金型を用いたプレス型抜き、ｄ）レーザ、プラズマ、ウォータージェット法などによる切断があげられる。 Specific methods for the drilling operation in step S1 include: a) cutting using a rotary tool such as an electric drill or drilling machine; b) punching using a punch; c) press punching using a die; d) laser. Cutting by plasma, water jet method and the like.
　また、ステップＳ４のアーク溶接作業は、上板１０の穴１１内の溶接金属４０を介して接合補助部材３０と下板２０を接合し、かつ接合補助部材３０に設けられた穴部３３を充填するために必要とされる。したがって、アーク溶接には充填材となるフィラー材（溶接材料）の挿入が不可欠となる。具体的に、以下の４つのアーク溶接法により、フィラー材が溶融して溶接金属４０が形成される。 Further, the arc welding operation in step S4 joins the joining auxiliary member 30 and the lower plate 20 via the weld metal 40 in the hole 11 of the upper plate 10, and fills the hole 33 provided in the joining auxiliary member 30. Is needed to do. Therefore, it is indispensable to insert a filler material (welding material) serving as a filler for arc welding. Specifically, the filler metal is melted and the weld metal 40 is formed by the following four arc welding methods.
　（ａ）　溶極式ガスシールドアーク溶接法は、一般的にＭＡＧ（マグ）やＭＩＧ（ミグ）と呼ばれる溶接法であり、ソリッドワイヤもしくはフラックス入りワイヤをフィラー兼アーク発生溶極として用い、ＣＯ２，Ａｒ，Ｈｅといったシールドガスで溶接部を大気から遮断して健全な溶接部を形成する手法である。 (A) The melting electrode type gas shielded arc welding method is a welding method generally referred to as MAG (Mig) or MIG (Mig), and uses a solid wire or a flux-cored wire as a filler and arc generating melting electrode, and CO 2. , Ar, and He are used to form a sound weld by shielding the weld from the atmosphere with a shielding gas such as Ar, He.
　（ｂ）ノンガスアーク溶接法は、セルフシールドアーク溶接法とも呼ばれ、特殊なフラックス入りワイヤをフィラー兼アーク発生溶極として用い、一方、シールドガスを不要として、健全な溶接部を形成する手段である。 (B) The non-gas arc welding method is also called a self-shielded arc welding method, which uses a special flux-cored wire as a filler and arc-generating electrode, and on the other hand, eliminates the need for shielding gas and forms a sound weld. is there.
　（ｃ）ガスタングステンアーク溶接法は、ガスシールドアーク溶接法の一種であるが非溶極式であり、一般的にＴＩＧ（ティグ）とも呼ばれる。シールドガスは、ＡｒまたはＨｅの不活性ガスが用いられる。タングステン電極と母材との間にはアークが発生し、フィラーワイヤはアークに横から送給される。
　一般的に、フィラーワイヤは通電されないが、通電させて溶融速度を高めるホットワイヤ方式ＴＩＧもある。この場合、フィラーワイヤにはアークは発生しない。 (C) The gas tungsten arc welding method is a kind of gas shielded arc welding method but is a non-melting electrode type and is generally called TIG (tig). As the shielding gas, an inert gas of Ar or He is used. An arc is generated between the tungsten electrode and the base material, and the filler wire is fed to the arc from the side.
Generally, the filler wire is not energized, but there is also a hot wire type TIG that energizes to increase the melting rate. In this case, no arc is generated in the filler wire.
　（ｄ）プラズマアーク溶接法はＴＩＧと原理は同じであるが、ガスの２重系統化と高速化によってアークを緊縮させ、アーク力を高めた溶接法である。 (D) Although the plasma arc welding method has the same principle as TIG, it is a welding method in which the arc is contracted and the arc force is increased by the dual system and high speed of gas.
　（ｅ）被覆アーク溶接法は、金属の芯線にフラックスを塗布した被覆アーク溶接棒をフィラーとして用いるアーク溶接法であり、シールドガスは不要である。 (E) The coated arc welding method is an arc welding method in which a coated arc welding rod in which a flux is applied to a metal core wire is used as a filler, and does not require a shielding gas.
　フィラー材（溶接材料）の材質については、溶接金属４０がＦｅ合金となるものであれば、一般的に用いられる溶接用ワイヤまたは溶接棒が適用可能である。なお、Ｎｉ合金でも鉄との溶接には不具合を生じないので適用可能である。
　具体的には、ＪＩＳとして（ａ）Ｚ３３１２，Ｚ３３１３，Ｚ３３１７，Ｚ３３１８，Ｚ３３２１，Ｚ３３２３，Ｚ３３３４、（ｂ）Ｚ３３１３、（ｃ）Ｚ３３１６，Ｚ３３２１，Ｚ３３３４，（ｄ）Ｚ３２１１，Ｚ３２２１，Ｚ３２２３，Ｚ３２２４、ＡＷＳ（Ａｍｅｒｉｃａｎ　Ｗｅｌｄｉｎｇ　Ｓｏｃｉｅｔｙ）として、（ａ）Ａ５．９，Ａ５．１４，Ａ５．１８，Ａ５．２０，Ａ５．２２，Ａ５．２８，Ａ５．２９，Ａ５．３４、（ｂ）Ａ５．２０、（ｃ）Ａ５．９，Ａ５．１４，Ａ５．１８，Ａ５．２８，（ｄ）Ａ５．１，Ａ５．４，Ａ５．５，Ａ５．１１といった規格材が流通している。 As for the material of the filler material (welding material), as long as the weld metal 40 is an Fe alloy, a commonly used welding wire or welding rod can be applied. Note that a Ni alloy is applicable because it does not cause a problem in welding with iron.
Specifically, as JIS, (a) Z3312, Z3313, Z3317, Z3318, Z3321, Z3323, Z3334, (b) Z3313, (c) Z3316, Z3321, Z3334, (d) Z3211, Z3221, Z3223, Z3224, AWS (American Welding Society): (a) A5.9, A5.14, A5.18, A5.20, A5.22, A5.28, A5.29, A5.34, (b) A5.20, c) Standard materials such as A5.9, A5.14, A5.18, A5.28, (d) A5.1, A5.4, A5.5, and A5.11 are in circulation.
　これらのアーク溶接法を用いて接合補助部材３０の穴部３３をフィラー材で充填するが、一般的にフィラーワイヤもしくは溶接棒の狙い位置は移動させる必要がなく、適切な送給時間を経てアークを切って溶接を終了させれば良い。ただし、穴部３３の面積が大きい場合は、フィラーワイヤもしくは溶接棒の狙い位置を穴部３３内で円を描くように移動させても良い。 The hole 33 of the joining auxiliary member 30 is filled with a filler material by using these arc welding methods, but generally the target position of the filler wire or the welding rod does not need to be moved, and the arc is passed through an appropriate feeding time. To finish the welding. However, when the area of the hole 33 is large, the target position of the filler wire or the welding rod may be moved so as to draw a circle in the hole 33.
　溶接金属４０は接合補助部材３０の穴部３３を充填し、さらに接合補助部材３０の表面に余盛りＷａを形成するのが望ましい（図１Ｂ参照）。余盛りを形成しない、すなわち、図４Ａに示すように、穴部３３が溶接後に外観上残る状態だと、特に、板厚方向（３次元方向）の外部応力に対しては、接合強度が不足となる可能性がある（図４Ｂ参照）。このため、余盛りＷａを形成することで、図５に示すように、板厚方向（３次元方向）の外部応力に対しては、接合補助部材３０の変形が抑えられ、高い接合強度が得られる。 It is desirable that the weld metal 40 fills the hole 33 of the joining auxiliary member 30 and further forms surplus Wa on the surface of the joining auxiliary member 30 (see FIG. 1B). If no extra space is formed, that is, as shown in FIG. 4A, the hole 33 remains in appearance after welding, the bonding strength is insufficient particularly for external stress in the plate thickness direction (three-dimensional direction). (See FIG. 4B). For this reason, as shown in FIG. 5, by forming the surplus Wa, deformation of the joining auxiliary member 30 is suppressed against external stress in the plate thickness direction (three-dimensional direction), and high joining strength is obtained. It is done.
　一方、余盛り側と反対側の溶込みについては、図６Ａに示すように、下板２０を適度に溶融していることが必要である。なお、図６Ｂに示すように、下板２０の板厚を超えて溶接金属４０が形成される、いわゆる裏波が出る状態にまで溶けても問題はない。
　ただし、下板２０が溶けずに、溶接金属４０が乗っかっているだけであると、高い強度は得られない。また、溶接金属４０が深く溶け込みすぎて、溶接金属４０と下板２０が溶け落ちてしまわないように溶接する必要がある。
　以上の作業によって、Ａｌ合金やＭｇ合金製の上板１０と鋼製の下板２０は高い強度で接合される。 On the other hand, for the penetration on the opposite side to the surplus side, it is necessary that the lower plate 20 is appropriately melted as shown in FIG. 6A. In addition, as shown to FIG. 6B, even if it melts to the state where the weld metal 40 is formed exceeding the plate | board thickness of the lower board 20, and what is called a back wave appears, there is no problem.
However, if the lower plate 20 is not melted and only the weld metal 40 is on it, high strength cannot be obtained. Moreover, it is necessary to weld so that the weld metal 40 may melt deeply and the weld metal 40 and the lower plate 20 may not melt.
By the above operation, the upper plate 10 made of Al alloy or Mg alloy and the lower plate 20 made of steel are joined with high strength.
　以下、上記アークスポット溶接法において使用される鋼製の接合補助部材３０の役割について説明する。 Hereinafter, the role of the steel joining auxiliary member 30 used in the arc spot welding method will be described.
　まず、接合補助部材を使用せず、図７Ａ及び図７Ｂに示すように、単純にアルミ製の上板１０と鋼製の下板２０とを重ね、上板側から鋼もしくはニッケル合金製溶接ワイヤを用いたアーク溶接を定点で一定時間保持したアークスポット溶接を行った場合、形成される溶接金属４０ａはアルミと鋼、もしくはアルミと鋼とニッケルの合金となる。この合金は、アルミ含有量が多いので脆性的特性である金属間化合物（ＩＭＣ）を呈している。このような異材溶接継手１００ａは、一見接合されている様に見えても、横方向に引張応力がかかる（せん断引張）と、図８Ａ及び図８Ｂに示すように、溶接金属４０ａが容易に破壊して、外れてしまう。また、縦方向に引張応力がかかる（剥離引張）場合でも、図９Ａ及び図９Ｂに示すように、溶接金属４０ａが破断するか、もしくは溶接金属４０ａと上板１０の境界部あるいは溶接金属４０ａと下板２０の境界部が破断し、上板１３が抜けるようにして接合が外れてしまう。
　このように単にアルミ製の上板１０と鋼製の下板２０を重ねて、貫通溶接しようとしても、溶接金属４０ａは全部分が金属間化合物になってしまうので、せん断引張にも剥離引張にも弱く、溶接継手としては実用にならない。 First, without using a joining auxiliary member, as shown in FIGS. 7A and 7B, an aluminum upper plate 10 and a steel lower plate 20 are simply overlapped, and a steel or nickel alloy welding wire is formed from the upper plate side. When arc spot welding is performed in which arc welding using is held at a fixed point for a certain time, the formed weld metal 40a is aluminum and steel, or an alloy of aluminum, steel and nickel. This alloy exhibits an intermetallic compound (IMC) that is brittle because of its high aluminum content. Even if such a dissimilar weld joint 100a seems to be joined at first glance, if a tensile stress is applied in the lateral direction (shear tension), the weld metal 40a is easily broken as shown in FIGS. 8A and 8B. And it will come off. Even when tensile stress is applied in the longitudinal direction (peeling tension), as shown in FIGS. 9A and 9B, the weld metal 40a is broken, or the boundary between the weld metal 40a and the upper plate 10 or the weld metal 40a The boundary portion of the lower plate 20 is broken, and the upper plate 13 comes out and the joining is released.
Even if the upper plate 10 made of aluminum and the lower plate 20 made of steel are simply overlapped and attempted to be welded through in this way, the entire portion of the weld metal 40a becomes an intermetallic compound. However, it is not practical as a welded joint.
　また、図１０Ａ及び図１０Ｂに示すように、上板１０に適当なサイズの穴１１を開けておき、その穴１１を埋めるように鋼もしくはニッケル合金の溶接材料を溶かし込む手法が考えられる。
　この場合、溶接初期に形成される下板２０となっている鋼と溶接材料で形成される溶接金属４０ｂはアルミを溶かしていないので、金属間化合物は生成せず、高い強度と靱性を有しており、下板２０と強固に結合されている。また、上板１０に開けられた穴１１の内部に形成された溶接金属４０ｂは、アルミが溶融する割合が非常に少なく、金属間化合物の生成は大幅に抑制され、特に中心部は健全性を有している。ただし、上板１０に設けられた穴１１の近傍に限れば、アルミと鋼、あるいはアルミとニッケルの金属化合物層を形成する。このような異材溶接継手１００ｂに対し、図１１Ａに示すように、せん断引張応力がかかった場合、下板側は強固に金属結合しているため、高い応力に耐える。一方、上板側は金属間化合物が穴周囲に形成されてはいるが、それが剥離して動くことは形状的にできないため、初期には上板１０、下板２０の母材が変形する。このため、ほぼ変形せずに脆性破断する図７Ａ及び図７Ｂの異材溶接継手１００ａと比較すると、変形能力の向上が見られる。しかし、母材の変形が進み、図１１Ｂに示すように、接合部が９０°近く傾斜すると上下剥離引張と同じ状態になる。このようになると穴１１の周囲部に形成された金属間化合物が剥離し、上板１０が溶接部から容易に抜けてしまう。つまり、改善が不十分である。この結果は、図１２Ａ及び図１２Ｂに示すように、上下引張方向試験でも無論同じである。 Further, as shown in FIGS. 10A and 10B, a method is conceivable in which a hole 11 having an appropriate size is formed in the upper plate 10 and a welding material of steel or nickel alloy is melted so as to fill the hole 11.
In this case, since the weld metal 40b formed of the steel and the welding material which is the lower plate 20 formed at the initial stage of welding does not melt aluminum, an intermetallic compound is not generated, and it has high strength and toughness. And is firmly coupled to the lower plate 20. In addition, the weld metal 40b formed in the hole 11 formed in the upper plate 10 has a very small proportion of aluminum melting, and the generation of intermetallic compounds is greatly suppressed, particularly in the central portion. Have. However, as long as it is limited to the vicinity of the hole 11 provided in the upper plate 10, a metal compound layer of aluminum and steel or aluminum and nickel is formed. When a shear tensile stress is applied to such a dissimilar material welded joint 100b as shown in FIG. 11A, the lower plate side is firmly metal-bonded, and thus can withstand high stress. On the other hand, although the intermetallic compound is formed around the hole on the upper plate side, since it cannot be separated and moved in shape, the base materials of the upper plate 10 and the lower plate 20 are initially deformed. . For this reason, compared with the dissimilar material welded joint 100a of FIG. 7A and FIG. However, when the deformation of the base material progresses and the joint portion is inclined near 90 ° as shown in FIG. If it becomes like this, the intermetallic compound formed in the peripheral part of the hole 11 will peel, and the upper board 10 will come out easily from a welding part. In other words, the improvement is insufficient. This result is, of course, the same in the vertical tension direction test as shown in FIGS. 12A and 12B.
　上記２つの異材溶接継手１００ａ、１００ｂにおける課題から、せん断方向の引張応力及び上下剥離方向の応力にも耐えるように本実施形態の接合補助部材３０が使用される。つまり、図２Ａ～図２Ｄに示すように、上板１０に穴開けを施し、さらに中心に穴部３３が空いている鋼製の接合補助部材３０を同軸上に載せて、上板１０および接合補助部材３０の内部を充填するようにアーク溶接にて溶接金属４０を形成する。このようにすると、断面としては接合補助部材３０、溶接金属４０、下板２０が強固な金属結合によって溶接接合されている状態になる。上板１０に設けられた穴１１よりも幅広である接合補助部材３０の最大の役割は、上下剥離応力に対する抵抗である。図５に示したように、適切なサイズの接合補助部材３０を適用することにより、上板１０と溶接金属４０の界面が剥離して抜けてしまう現象を防止することが可能となる。一般的に、溶接金属４０は、十分に塑性変形した後、破断する。なお、接合補助部材３０は、せん断方向の引張応力に対しても、初期応力に対して悪影響を及ぼすことはなく、さらに母材変形による溶接部が９０°傾斜（図１１Ｂ参照）後の剥離応力変化に対して、上板１０と溶接金属４０の界面が剥離して抜けてしまう現象を防止する。 The joining auxiliary member 30 of this embodiment is used so as to withstand the tensile stress in the shearing direction and the stress in the vertical peeling direction due to the problems in the two dissimilar welded joints 100a and 100b. That is, as shown in FIGS. 2A to 2D, a hole is formed in the upper plate 10, and a steel joining auxiliary member 30 having a hole 33 at the center is placed on the same axis, and the upper plate 10 and the bonding member are joined. The weld metal 40 is formed by arc welding so as to fill the inside of the auxiliary member 30. If it does in this way, it will be in the state where the joining auxiliary member 30, the weld metal 40, and the lower board 20 are weld-joined by the strong metal bond as a cross section. The greatest role of the joining auxiliary member 30 which is wider than the hole 11 provided in the upper plate 10 is resistance to vertical peeling stress. As shown in FIG. 5, it is possible to prevent a phenomenon in which the interface between the upper plate 10 and the weld metal 40 is peeled off by applying an appropriately sized joining auxiliary member 30. Generally, the weld metal 40 breaks after sufficiently plastic deformation. It should be noted that the joining auxiliary member 30 does not adversely affect the initial stress even with respect to the tensile stress in the shear direction, and further, the peeling stress after the welded portion is inclined by 90 ° (see FIG. 11B) due to the base material deformation. The phenomenon that the interface between the upper plate 10 and the weld metal 40 is peeled off due to the change is prevented.
　また、詳細後述するが、接合補助部材３０は、外径寸法ＰＤ（円形の場合、直径）が大きく、かつ厚さＰＨが大きいほど板厚方向（３次元方向）の外部応力に対して強度を増すため、望ましい。だが、必要以上に大きいと重量増要因や、上板１０の表面からの出っ張り過剰により、美的外観劣化や近接する他の部材との干渉が生じる。このため、接合補助部材３０のサイズは、必要設計に応じて決定される。 Although described in detail later, the auxiliary bonding member 30 has an outer diameter P D (for a circular, diameter) is large and the external stresses as the thickness P H is larger thickness direction (three dimensional directions) Desirable for increased strength. However, if it is larger than necessary, it may cause an increase in weight or excessive protrusion from the surface of the upper plate 10, resulting in aesthetic appearance deterioration and interference with other adjacent members. For this reason, the size of the joining auxiliary member 30 is determined according to the required design.
　さらに、詳細後述するが、接合補助部材３０の穴部の直径ＰＳは上板１０に設けられた穴径ＰＤと同じか、もしくは小さくなければならない。接合補助部材３０の穴部の直径ＰＳの方が大きければ、Ａｌ合金やＭｇ合金が超高温であるアークに当たって沢山溶融し、形成される溶接金属４０内に多量の金属間化合物を形成して脆化しやすくなるためである。また、アーク溶接時にＡｌやＭｇが蒸発し、多量のスパッタやヒュームを発生して周囲環境を汚染する。ＡｌやＭｇはできるだけ溶融や蒸発させないことが、本溶接法では重要であり、ゆえに溶接金属４０が接合補助部材３０の高さに到達するまでは露出していないことが必要である。 Moreover, although described in detail later, the diameter P S of the hole of the auxiliary bonding member 30 has to be equal to or smaller and diameter P D provided on the upper plate 10. If it is larger in diameter P S of the hole of the auxiliary bonding member 30, and an Al alloy or Mg alloy melt lot against the arc is very high temperature, to form a large amount of intermetallic compounds in the weld metal 40 formed It is because it becomes easy to embrittle. Also, during arc welding, Al and Mg evaporate, generating a large amount of spatter and fumes and polluting the surrounding environment. It is important in this welding method that Al and Mg are not melted or evaporated as much as possible. Therefore, it is necessary that the weld metal 40 is not exposed until it reaches the height of the joining auxiliary member 30.
　また、接合補助部材３０は、Ａｌ合金もしくはＭｇ合金である上板１０と鋼である下板２０とを重ね合わせる際に、重ね合わせ面に生じる空隙（ギャップ）ｇを最小化する役割を果たす（図１３Ａ参照）。アーク溶接工程では、溶接金属４０は熱収縮するため、その際、下板２０と接合補助部材３０が共に近づく方向に力が作用する。それによって、溶接前に多少の空隙ｇがあっても、図１３Ｂに示すように、溶接後には空隙ｇは減少し、接合部の設計精度が高まる。 Further, the joining auxiliary member 30 plays a role of minimizing a gap (gap) g generated on the overlapping surface when the upper plate 10 made of Al alloy or Mg alloy and the lower plate 20 made of steel are overlapped ( (See FIG. 13A). In the arc welding process, since the weld metal 40 is thermally contracted, a force acts in a direction in which the lower plate 20 and the joining auxiliary member 30 approach each other. As a result, even if there is some gap g before welding, as shown in FIG. 13B, the gap g decreases after welding and the design accuracy of the joint is increased.
　なお、鋼製の接合補助部材３０の材質は、純鉄および鉄合金であれば、特に制限されるものでなく、例えば、軟鋼、炭素鋼、ステンレス鋼などがあげられる。 Note that the material of the steel joining auxiliary member 30 is not particularly limited as long as it is pure iron and an iron alloy, and examples thereof include mild steel, carbon steel, and stainless steel.
　また、接合補助部材３０の各種寸法は、図１４に示すように、上板１０との関係で次のように設定される。 Further, various dimensions of the joining auxiliary member 30 are set as follows in relation to the upper plate 10 as shown in FIG.
　・穴部直径ＰＳ
　穴部３３の直径ＰＳは、上板１０の穴１１の直径ＢＤに対し５０％以上１００％以下に設計される。上述したように、接合補助部材３０の穴部３３の直径ＰＳが上板１０に空けられる穴１１の直径ＢＤと同じか、もしくは小さくなければならない（即ち、１００%以下）。しかしながら、穴部３３の直径ＰＳが小さすぎるのは望ましくない。穴部３３の直径ＰＳが穴１１の直径ＢＤに対し５０％未満であると、図１５Ａに示すように、形成される溶接金属４０と上板１０の穴壁間に空隙が出来、せん断方向の応力が作用すると大きな位置ずれを起こしやすくなる。また、上下剥離応力に対しても、図１５Ｂに示すように、接合補助部材３０が変形して抜けやすくなる。これらの理由により、接合補助部材３０の穴部３３の直径ＰＳが上板１０に空けられる穴１１の直径ＢＤに対し５０%以上とするのが望ましい。 ・ Hole diameter P S
The diameter P S of the hole 33 is designed to be 50% or more and 100% or less with respect to the diameter B D of the hole 11 of the upper plate 10. As described above, the diameter P S of the hole 33 of the auxiliary bonding member 30 must be equal to, or smaller diameter B D of the hole 11 to be drilled in the top plate 10 (i.e., 100% or less). However, the diameter P S of the hole 33 is too small is not desirable. If the diameter P S of the hole 33 is less than 50% relative to the diameter B D of the hole 11, as shown in FIG. 15A, it is void in the hole walls of the weld metal 40 and the upper plate 10 to be formed, a shear When a directional stress is applied, a large misalignment is likely to occur. Further, as shown in FIG. 15B, the joining auxiliary member 30 is easily deformed and easily pulled out against the vertical peeling stress. For these reasons, the diameter P S of the hole 33 of the auxiliary bonding member 30 is preferably set to 50% or more relative to the diameter B D of the hole 11 to be drilled in the top plate 10.
　・接合補助部材の外形寸法（円形の場合、直径）ＰＤ
　接合補助部材３０の外形寸法ＰＤは、上板１０の穴１１の直径ＢＤに対し１０５％以上に設計される。接合補助部材３０は、上述したように、板厚方向への外部応力、言い換えれば引き剥がす応力が働いた際への抵抗力としての主体的役割を果たす。接合補助部材３０は外形寸法ＰＤが大きく、かつ厚さが大きいほど板厚方向（３次元方向）の外部応力に対して強度を増すため、望ましい。接合補助部材３０の外形寸法ＰＤが穴１１の直径ＢＤに対し１０５％未満では、接合補助部材３０が板厚方向への外部応力に対して弾塑性変形した場合に、上板１０の穴１１の直径ＢＤ以下の見かけ直径に容易になりやすく、さすれば上板１０が抜けてしまいやすくなる。つまり、接合補助部材３０が高い抵抗力を示さない。したがって、接合補助部材３０の外形寸法ＰＤは、穴１１の直径ＢＤの１０５％を下限とする。より好ましくは、接合補助部材３０の外形寸法ＰＤは、穴１１の直径ＢＤの１２０％を下限とするとよい。一方、接合部強度の観点では上限を設ける必要は無い。 ・ External dimensions of joining auxiliary member (diameter in the case of a circle) P D
Dimensions P D of the auxiliary bonding member 30 is at least equal to 105% relative to the diameter B D of the hole 11 of the upper plate 10. As described above, the joining auxiliary member 30 plays a main role as a resistance force when an external stress in the thickness direction, in other words, a stress to be peeled off is applied. To increase the strength against external stress of the joining auxiliary member 30 is larger the outer dimensions P D is large and the thickness plate thickness direction (three dimensional directions), desirable. If external dimension P D of the auxiliary bonding member 30 is less than 105% relative to the diameter B D of the hole 11, the auxiliary bonding member 30 has elastic-plastic deformation against an external stress in the thickness direction, the holes of the upper plate 10 The apparent diameter of 11 or less of the diameter BD is easily obtained, and the upper plate 10 is likely to come off. That is, the joining auxiliary member 30 does not exhibit high resistance. Therefore, the outer dimension P D of the joining auxiliary member 30 is 105% of the diameter B D of the hole 11 as a lower limit. More preferably, the outer dimension P D of the joining auxiliary member 30 may be 120% of the diameter B D of the hole 11 as a lower limit. On the other hand, there is no need to provide an upper limit in terms of joint strength.
　・接合補助部材の厚さＰＨ
　接合補助部材３０の厚さＰＨは、上板１０の板厚ＢＨの５０％以上１５０％以下に設計される。上記で述べたとおり、接合補助部材３０は外形寸法ＰＤが大きく、かつ厚さＰＨが大きいほど板厚方向（３次元方向）の外部応力に対して強度を増すため、望ましい。この接合補助部材３０の厚さＰＨは継手の上板１０の板厚ＢＨに応じて大きくすることで高い抵抗力を発揮する。接合補助部材３０の厚さＰＨが上板１０の板厚ＢＨの５０％未満では、接合補助部材３０が板厚方向への外部応力に対して容易に弾塑性変形を生じ、上板１０の穴１１の直径ＢＤ以下の見かけ直径になると、抜けやすくなる。つまり、接合補助部材３０が高い抵抗力を示さない。したがって、接合補助部材３０の厚さＰＨは上板１０の板厚ＢＨの５０％を下限とする。一方、接合補助部材３０の厚さＰＨが上板１０の板厚ＢＨの１５０％を超えて大きくすると、継手強度的には問題ないが、過剰に張り出した形状となって外観が悪いだけでなく、重量も重くなる。したがって、接合補助部材３０の厚さＰＨは、上板１０の板厚ＢＨの１５０％以下にすることが必要である。 ・ Thickness P H of joining auxiliary member
The thickness P H of the joining auxiliary member 30 is designed to be 50% or more and 150% or less of the plate thickness B H of the upper plate 10. As mentioned above, the auxiliary bonding member 30 to increase the strength against external stress larger external dimension P D, and as the thickness P H is larger thickness direction (three dimensional directions), desirable. By increasing the thickness P H of the joining auxiliary member 30 in accordance with the plate thickness B H of the upper plate 10 of the joint, a high resistance is exhibited. When the thickness P H of the joining auxiliary member 30 is less than 50% of the plate thickness B H of the upper plate 10, the joining auxiliary member 30 easily undergoes elasto-plastic deformation with respect to external stress in the plate thickness direction. When the apparent diameter is equal to or smaller than the diameter BD of the hole 11, the hole 11 is easily removed. That is, the joining auxiliary member 30 does not exhibit high resistance. Therefore, the thickness P H of the joining auxiliary member 30 is set to 50% of the plate thickness B H of the upper plate 10 as a lower limit. On the other hand, if the thickness P H of the joining auxiliary member 30 exceeds 150% of the plate thickness B H of the upper plate 10, there is no problem in the joint strength, but the overhanging shape results in poor appearance. Not only will the weight increase. Therefore, the thickness P H of the joining auxiliary member 30 needs to be 150% or less of the plate thickness B H of the upper plate 10.
　また、図１Ｂに示すように、アークによる充填溶接工程において、接合補助部材３０の表面上に余盛りＷａが形成される際、余盛りＷａの直径ＷＤは、接合補助部材３０の穴部３３の直径ＰＳの１０５％以上に設定される。
　上述のとおり、接合補助部材３０は、板厚方向（３次元方向）の外部応力に対して抵抗力を発揮する役割があるが、穴部３３を完全に埋めなければ高い抵抗力を発揮しない。穴部３３が完全に埋まらず、穴部３３の内側面が残った状態であると、接合補助部材３０と溶接金属４０との結合面積が不足し、容易に外れてしまうことがある。接合補助部材３０と溶接金属４０の結合面積を高めるためには、完全に充填し、余盛りＷａが形成されることが望ましい。余盛りＷａが形成されると、その直径ＷＤは接合補助部材３０の穴部３３の直径ＰＳを超えることになる。余盛りＷａの直径ＷＤは、接合補助部材３０の穴部３３の直径ＰＳの１０５％以上とすると確実に余盛り形成されたことになるため、これを下限値とする。 Further, as shown in FIG. 1B, in the filling welding process by the arc, when the remaining prime Wa is formed on the surface of the auxiliary bonding member 30, the diameter W D of excess prime Wa is hole 33 of the auxiliary bonding member 30 It is set for more than 105% of the diameter P S.
As described above, the joining auxiliary member 30 has a role of exerting resistance against external stress in the plate thickness direction (three-dimensional direction), but does not exhibit high resistance unless the hole 33 is completely filled. When the hole 33 is not completely filled and the inner side surface of the hole 33 remains, the coupling area between the joining auxiliary member 30 and the weld metal 40 may be insufficient and may be easily detached. In order to increase the bonding area between the joining auxiliary member 30 and the weld metal 40, it is desirable to completely fill and form the surplus Wa. When excess prime Wa is formed, the diameter W D will exceed the diameter P S of the hole 33 of the auxiliary bonding member 30. The diameter W D of excess prime Wa, since that would reliably formed over prime When more than 105% of the diameter P S of the hole 33 of the auxiliary bonding member 30, which is the lower limit.
　なお、上板１０及び下板２０の板厚については、限定される必要は必ずしもないが、施工能率と、重ね溶接としての形状を考慮すると、上板１０の板厚は、４．０ｍｍ以下であることが望ましい。一方、アーク溶接の入熱を考慮すると、板厚が過度に薄いと溶接時に溶け落ちてしまい、溶接が困難であることから、上板１０、下板２０共に０．５ｍｍ以上とすることが望ましい。 In addition, about the plate | board thickness of the upper board 10 and the lower board 20, although it does not necessarily need to be limited, when construction efficiency and the shape as lap welding are considered, the board thickness of the upper board 10 is 4.0 mm or less. It is desirable to be. On the other hand, considering the heat input of arc welding, if the plate thickness is excessively thin, it will melt during welding and welding is difficult, so it is desirable that both the upper plate 10 and the lower plate 20 be 0.5 mm or more. .
　以上の構成により、上板１０がアルミニウム合金もしくはマグネシウム合金、下板２０が鋼の素材を強固に接合することができる。 With the above configuration, the upper plate 10 can firmly join the aluminum alloy or magnesium alloy, and the lower plate 20 can firmly join the steel material.
　ここで、異種金属同士を直接接合する場合の課題としては、ＩＭＣの形成という課題以外に、もう一つの課題が知られている。それは、異種金属同士が接すると、ガルバニ電池を形成する為に腐食を加速する原因になる。この原因（電池の陽極反応）による腐食は電食と呼ばれている。異種金属同士が接する面に水があると腐食が進むので、接合箇所として水が入りやすい場所に本実施形態が適用される場合は、電食防止を目的として、水の浸入を防ぐためのシーリング処理を施す必要がある。本接合法でもＡｌ合金やＭｇ合金と鋼が接する面は複数形成されるので、樹脂系の接着剤をさらなる継手強度向上の目的のみならず、シーリング材として用いることが好ましい。 Here, as a problem in the case of directly joining different kinds of metals, another problem is known in addition to the problem of IMC formation. That is, when dissimilar metals come into contact with each other, it causes corrosion to accelerate in order to form a galvanic cell. Corrosion due to this cause (battery anode reaction) is called electrolytic corrosion. Corrosion proceeds when there is water on the surface where dissimilar metals are in contact with each other, so when this embodiment is applied to a place where water can easily enter as a joint, sealing to prevent ingress of water for the purpose of preventing electrolytic corrosion It is necessary to perform processing. Even in this bonding method, a plurality of surfaces where the Al alloy or Mg alloy is in contact with the steel are formed. Therefore, it is preferable to use a resin adhesive not only for the purpose of further improving the joint strength but also as a sealing material.
　例えば、図１６Ａ及び図１６Ｂに示す第１変形例のように、上板１０及び下板２０の接合面で、溶接部周囲に接着剤６０を全周に亘って環状に塗布してもよい。なお、接着剤６０を上板１０及び下板２０の接合面で、溶接部周囲に全周に亘って塗布する方法としては、図１７Ａ及び図１７Ｂに示す第２変形例のように、溶接箇所を除いた接合面の全面に塗布する場合も含まれる、これにより、上板１０、下板２０、及び溶接金属４０の電食速度を下げることができる。 For example, as in the first modification shown in FIGS. 16A and 16B, the adhesive 60 may be applied around the entire circumference of the welded portion at the joint surface of the upper plate 10 and the lower plate 20. In addition, as a method of applying the adhesive 60 over the entire periphery of the welded portion at the joint surface of the upper plate 10 and the lower plate 20, as in the second modification shown in FIGS. In this case, the rate of electrolytic corrosion of the upper plate 10, the lower plate 20, and the weld metal 40 can be reduced.
　また、図１８Ａ及び図１８Ｂに示す第３変形例のように、上板１０の穴１１の周囲と接合補助部材３０の下面との間に接着剤６０を塗布してもよい。これにより、上板１０、接合補助部材３０、及び溶接金属４０の電食速度を下げることができる。
　この場合、副次的効果として、アーク溶接前に接合補助部材３０を上板１０に仮止めしておく作用がある。特に、図１９に示すように、アーク溶接が、横向や上向姿勢になる場合、接着剤６０を塗布しておくことで、接合補助部材３０が重力によって落下するのを防ぐことができ、溶接を適切に施工することができる。 Moreover, you may apply | coat the adhesive agent 60 between the circumference | surroundings of the hole 11 of the upper board 10, and the lower surface of the joining auxiliary member 30 like the 3rd modification shown in FIG. 18A and 18B. Thereby, the electrolytic corrosion rate of the upper board 10, the joining auxiliary member 30, and the weld metal 40 can be lowered.
In this case, as a secondary effect, there is an operation of temporarily fixing the joining auxiliary member 30 to the upper plate 10 before arc welding. In particular, as shown in FIG. 19, when the arc welding is in a horizontal or upward posture, it is possible to prevent the joining auxiliary member 30 from falling due to gravity by applying the adhesive 60, and welding. Can be constructed properly.
　さらに、図２０Ａ及び図２０Ｂに示す第４変形例のように、接合補助部材３０と上板１０の表面との境界部に接着剤６０を塗布してもよい。これにより、電食速度低下の効果が得られると共に、接着剤塗布をアーク溶接前に行えば、接合補助部材３０を上板１０に仮止めしておく作用が得られる。なお、図１８Ａ及び図１８Ｂに示す第３変形例では、塗布は溶接工程前にしか実施できないが、図２０Ａ及び図２０Ｂに示す第４変形例では、塗布は溶接工程前でも溶接工程後でも可能である。 Furthermore, an adhesive 60 may be applied to the boundary portion between the joining auxiliary member 30 and the surface of the upper plate 10 as in the fourth modification shown in FIGS. 20A and 20B. As a result, the effect of reducing the electrolytic corrosion rate is obtained, and if the adhesive application is performed before arc welding, an operation of temporarily fixing the joining auxiliary member 30 to the upper plate 10 is obtained. In the third modification shown in FIGS. 18A and 18B, application can be performed only before the welding process, but in the fourth modification shown in FIGS. 20A and 20B, application can be performed before or after the welding process. It is.
　なお、接合補助部材３０の上板１０との接触面は、図２１Ａに示すように、必ずしも平坦な面である必要はない。即ち、接合補助部材３０の上板１０との接触面は、図２１Ｂ及び図２１Ｃに示すように、必要に応じてスリット３４ａ、３４ｂを設けて良い。特に、上板１０との接触面側に円周状のスリット３４ａ又は放射状のスリット３４ｂを設けると、接着剤６０の塗布がスリット３４ａ、３４ｂの隙間に入り込んで逃げなくなるため、安定した接着が行なわれ、シーリングの効果も確実となる。このような平坦ではない面の場合の接合補助部材３０の厚さＰＨの定義は、高さの最も大きな部分とする。 In addition, the contact surface with the upper plate 10 of the joining auxiliary member 30 does not necessarily need to be a flat surface as shown in FIG. 21A. That is, as shown in FIGS. 21B and 21C, slits 34a and 34b may be provided on the contact surface with the upper plate 10 of the joining auxiliary member 30 as necessary. In particular, when the circumferential slit 34a or the radial slit 34b is provided on the contact surface side with the upper plate 10, the application of the adhesive 60 enters the gap between the slits 34a and 34b and does not escape, so that stable adhesion is performed. The sealing effect is also ensured. Defining the thickness P H of the auxiliary bonding member 30 in the case of such a non-planar surface is the largest part of the height.
　さらに、図２２に示す第５変形例のように、下板２０に膨出部２１を設けてもよい。
　典型的に、ＡｌやＭｇ合金製上板１０の板厚が大きな場合がある。上板１０の板厚が大きいと、溶接工程で溶接ワイヤを沢山溶融して、上板１０の穴１１を越えて接合補助部材３０の穴部３３を埋める必要があり、熱量が過大となって、充填完了するより先に下板２０の鋼板が溶け落ちしてしまいやすくなる。このため、下板２０について絞り加工で膨出部２１を設ければ、穴１１の体積が小さくなるので溶け落ち欠陥を防ぎながら、充填することができる。 Furthermore, a bulging portion 21 may be provided on the lower plate 20 as in a fifth modification shown in FIG.
Typically, the thickness of the upper plate 10 made of Al or Mg alloy may be large. When the plate thickness of the upper plate 10 is large, it is necessary to melt a lot of welding wires in the welding process and fill the hole portion 33 of the joining auxiliary member 30 beyond the hole 11 of the upper plate 10, and the amount of heat becomes excessive. The steel plate of the lower plate 20 is likely to melt away before the filling is completed. For this reason, if the bulging part 21 is provided by the drawing process about the lower board 20, since the volume of the hole 11 becomes small, it can be filled, preventing a melt-off defect.
　また、第５変形例では、下板２０の膨出部２１は、上板１０と下板２０とを位置合わせをするための目印となり、下板２０の膨出部２１と上板１０の穴１１を容易に合わせることができ、重ね合わせ作業の効率向上につながる。 Further, in the fifth modified example, the bulging portion 21 of the lower plate 20 serves as a mark for aligning the upper plate 10 and the lower plate 20, and the bulging portion 21 of the lower plate 20 and the hole of the upper plate 10. 11 can be easily matched, leading to an improvement in the efficiency of the overlaying work.
　なお、膨出部２１の絞り加工は、図２３Ａに示すように、下板２０の膨出部２１が形成される部分の周辺部をダイ５０で拘束する。そして、図２３Ｂに示すように、膨出部２１が形成される部分に圧力をかけてポンチ５１を押し込むことで、膨出部２１が成形される。 In addition, the drawing process of the bulging part 21 restrains the peripheral part of the part in which the bulging part 21 of the lower board 20 is formed with the die | dye 50, as shown to FIG. 23A. And as shown to FIG. 23B, the bulging part 21 is shape | molded by pressing the punch 51 by applying a pressure to the part in which the bulging part 21 is formed.
　また、本実施形態の溶接法は、接合面積が小さい点溶接と言えるので、ある程度の接合面積を有する実用部材同士の重ね合わせ部分Ｊを接合する場合は、本溶接法を図２４Ａ～図２４Ｃに示すように、複数実施すればよい。これにより、重ね合わせ部分Ｊにおいて強固な接合が行われる。本実施形態は、図２４Ｂ及び図２４Ｃに示すような開断面構造にも使用できるが、特に、図２４Ａに示すような閉断面構造において好適に使用することができる。 Further, since the welding method of this embodiment can be said to be spot welding with a small joining area, when joining the overlapping portions J of practical members having a certain joining area, this welding method is shown in FIGS. 24A to 24C. As shown, multiple implementations may be performed. Thereby, strong joining is performed in the overlapping portion J. Although this embodiment can be used for an open cross-sectional structure as shown in FIGS. 24B and 24C, it can be suitably used particularly for a closed cross-sectional structure as shown in FIG. 24A.
　また、実用部材同士の重ね合わせ部分Ｊを接合する場合、強度や剛性を確保する観点から、近接した領域に複数の接合部を設けることが一般的である。図２４Ａ～図２４Ｃに示すような継手では、全ての溶接位置毎に接合補助部材３０を一枚ずつ挿入している。しかしながら、近接した領域に複数の溶接位置がある場合には、図２５Ａ～図２５Ｃに示すように、複数の溶接位置の距離に合わせた複数の穴部３３を持った接合補助部材３０Ａを使用するほうが、接合補助部材３０の配置の作業性を向上できる。 In addition, when joining the overlapping portions J of the practical members, it is common to provide a plurality of joints in adjacent regions from the viewpoint of ensuring strength and rigidity. In the joint as shown in FIGS. 24A to 24C, one joining auxiliary member 30 is inserted at every welding position. However, when there are a plurality of welding positions in the adjacent region, as shown in FIGS. 25A to 25C, a joining auxiliary member 30A having a plurality of holes 33 matched to the distance of the plurality of welding positions is used. The workability of arrangement | positioning of the joining auxiliary member 30 can be improved.
　図２６Ａ～図２６Ｃは、複数の穴部３３を有する接合補助部材３０Ａの各例をそれぞれ示している。このような接合補助部材３０Ａを使用する場合には、上板１０にも複数の穴１１が空けられ、接合補助部材３０Ａの複数の穴部３３と、上板１０に設けられた複数の穴１１とが同軸上にそれぞれ配置される。そして、接合補助部材３０の複数の穴部３３を溶接金属４０でそれぞれ充填すると共に、下板２０及び接合補助部材３０を溶接する。なお、図２６Ｃの角丸四角形の接合補助部材３０Ａにおいて、穴部３３の中心から四角形の一辺までの距離ＰＹの寸法規定は、上述した上板１０との関係で与えられる外形寸法ＰＤを用いて、ＰＤ＝２・ＰＹとして与えられる。 26A to 26C show examples of the joining auxiliary member 30A having a plurality of hole portions 33, respectively. When such a joining auxiliary member 30A is used, a plurality of holes 11 are also formed in the upper plate 10, and a plurality of holes 33 of the joining auxiliary member 30A and a plurality of holes 11 provided in the upper plate 10 are provided. Are arranged on the same axis. And while filling the some hole part 33 of the joining auxiliary member 30 with the weld metal 40, the lower board 20 and the joining auxiliary member 30 are welded. Incidentally, in the bonding auxiliary member 30A of the rounded rectangle in FIG. 26C, the dimensions defining the distances P Y from the center of the hole portion 33 to one side of the rectangle, the outer dimensions P D given in relation to the upper plate 10 described above And is given as P D = 2 · P Y.
　以上説明したように、本実施形態の異材接合用アークスポット溶接法によれば、上板１０に穴１１を空ける工程と、上板１０と下板２０を重ね合わせる工程と、円形の穴部３３が形成される鋼製の接合補助部材３０を、該穴部３３が上板１０に設けられた穴１１と同軸となるように上板１０上に配置する工程と、以下の（ａ）～（ｄ）のいずれかの手法によって、接合補助部材３０の穴部３３を溶接金属４０で充填すると共に、上板１０の穴１１内の溶接金属４０を介して下板２０及び接合補助部材３０を溶接する工程と、を備える。 As described above, according to the arc spot welding method for dissimilar material joining according to the present embodiment, the step of forming the hole 11 in the upper plate 10, the step of overlapping the upper plate 10 and the lower plate 20, and the circular hole portion 33. A step of disposing the steel joining auxiliary member 30 on the upper plate 10 so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10, and the following (a) to ( The hole 33 of the joining auxiliary member 30 is filled with the weld metal 40 by any of the methods of d), and the lower plate 20 and the joining auxiliary member 30 are welded via the weld metal 40 in the hole 11 of the upper plate 10. And a step of performing.
（ａ）鉄合金、または、Ｎｉ合金の溶接金属４０が得られる溶接ワイヤを溶極として用いるガスシールドアーク溶接法。
（ｂ）前記溶接ワイヤを溶極として用いるノンガスアーク溶接法。
（ｃ）前記溶接ワイヤを非溶極フィラーとして用いるガスタングステンアーク溶接法。
（ｄ）前記溶接ワイヤを非溶極フィラーとして用いるプラズマアーク溶接法。
（ｅ）鉄合金、または、Ｎｉ合金の溶接金属４０が得られる被覆アーク溶接棒を溶極として用いる被覆アーク溶接法。
　これにより、Ａｌ合金もしくはＭｇ合金の上板１０と鋼の下板２０を、安価なアーク溶接設備を用いて、強固かつ信頼性の高い品質で接合でき、かつ開断面構造にも閉断面構造にも制限無く適用できる。 (A) A gas shielded arc welding method using a welding wire from which an iron alloy or Ni alloy weld metal 40 is obtained as a melting electrode.
(B) Non-gas arc welding method using the welding wire as a melting electrode.
(C) Gas tungsten arc welding method using the welding wire as a non-melting electrode filler.
(D) A plasma arc welding method using the welding wire as a non-melting electrode filler.
(E) A coated arc welding method in which a coated arc welding rod from which an iron alloy or Ni alloy weld metal 40 is obtained is used as a melting electrode.
As a result, the upper plate 10 of the Al alloy or Mg alloy and the lower plate 20 of the steel can be joined with low-cost arc welding equipment with strong and reliable quality, and the open cross-section structure can be changed to the closed cross-section structure. Can be applied without limitation.
　また、下板２０には、絞り加工により膨出部２１が形成されており、重ね合わせ工程において、下板２０の膨出部２１が、上板１０の穴１１内に配置される。これにより、上板１０の板厚が大きな場合でも溶け落ち欠陥を防止して溶接することができ、また、上板１０と下板２０を容易に位置決めすることができる。 The bulging portion 21 is formed on the lower plate 20 by drawing, and the bulging portion 21 of the lower plate 20 is disposed in the hole 11 of the upper plate 10 in the overlapping process. Thereby, even when the plate | board thickness of the upper board 10 is large, a melt-off defect can be prevented and it can weld and the upper board 10 and the lower board 20 can be positioned easily.
　また、重ね合わせ工程の前に、上板１０と下板２０の少なくとも一方の重ね合せ面には、穴１１の周囲に、全周に亘って接着剤６０を塗布する工程を、さらに備える。これにより、接着剤は、継手強度向上の他、シーリング材として作用し、上板１０、下板２０及び溶接金属４０の電食速度を下げることができる。 In addition, before the overlapping step, a step of applying the adhesive 60 around the hole 11 is further provided on at least one overlapping surface of the upper plate 10 and the lower plate 20. Thereby, an adhesive agent can act as a sealing material besides joint strength improvement, and can reduce the electrolytic corrosion rate of the upper board 10, the lower board 20, and the weld metal 40. FIG.
　また、配置工程において、接合補助部材３０と、該接合補助部材と対向する上板１０との間の少なくとも一方の対向面に、接着剤６０を塗布する。これにより、上板１０、接合補助部材３０及び溶接金属４０の電食速度を下げることができる。 Further, in the arranging step, the adhesive 60 is applied to at least one facing surface between the joining auxiliary member 30 and the upper plate 10 facing the joining auxiliary member. Thereby, the electrolytic corrosion rate of the upper plate 10, the joining auxiliary member 30, and the weld metal 40 can be lowered.
　また、配置工程の際、又は、充填溶接工程後に、接合補助部材３０と、上板１０の表面との境界部に接着剤６０を塗布する。これにより、上板１０と接合補助部材３０の接合強度を向上することができる。なお、挿入工程の際に、接着剤６０を塗布すれば、接合補助部材３０を仮止めできる作用が得られる。 Further, the adhesive 60 is applied to the boundary between the joining auxiliary member 30 and the surface of the upper plate 10 during the arrangement process or after the filling and welding process. Thereby, the joining strength of the upper board 10 and the joining auxiliary member 30 can be improved. In addition, the effect | action which can temporarily fix the joining auxiliary member 30 will be acquired if the adhesive agent 60 is apply | coated in the case of an insertion process.
　また、接合補助部材３０の穴部３３の直径ＰＳは、上板１０の穴１１の直径ＢＤに対し５０％以上１００％以下であるので、溶接金属４０内の金属間化合物の抑制、及び、せん断応力による位置ずれや、上下剥離応力による上板１０の抜けを防止することができる。 The diameter P S of the hole 33 of the auxiliary bonding member 30, so to the diameter B D of the hole 11 of the upper plate 10 is 100% or less than 50% inhibition of the intermetallic compounds in the weld metal 40, and Further, it is possible to prevent positional displacement due to shear stress and removal of the upper plate 10 due to vertical peeling stress.
　また、接合補助部材３０の外径寸法ＰＤは、上板１０の穴１１の直径ＢＤに対し１０５％以上であるので、接合補助部材３０は、板厚方向の外部応力への抵抗力として機能することができる。 The outer diameter P D of the auxiliary bonding member 30, so to the diameter B D of the hole 11 of the upper plate 10 is 105% or more, the bonding auxiliary member 30, as the resistance of the direction of the thickness of the external stress Can function.
　また、接合補助部材３０の厚さＰＨは、上板１０の板厚ＢＨの５０％以上１５０％以下であるので、接合補助部材３０は、外観性及び重量増を考慮しつつ、板厚方向の外部応力への抵抗力として機能することができる。 Further, since the thickness P H of the joining auxiliary member 30 is 50% or more and 150% or less of the plate thickness B H of the upper plate 10, the joining auxiliary member 30 has a plate thickness in consideration of appearance and weight increase. Can act as a resistance to external stress in the direction.
　また、充填溶接工程において、接合補助部材の表面上に余盛りＷａが形成され、かつ余盛りＷａの直径ＷＤが、接合補助部材３０の穴部３３の直径ＰＳに対し、１０５％以上となるので、余盛りＷａは、板厚方向の外部応力への抵抗力として機能することができる。 Further, in the filling welding process, excess prime Wa on the surface of the bonding auxiliary member is formed, and the diameter W D of excess prime Wa is, with respect to the diameter P S of the hole 33 of the auxiliary bonding member 30, 105% or more and Therefore, the surplus Wa can function as a resistance force to the external stress in the plate thickness direction.
　また、上板１０には、複数の穴１１が空けられると共に、接合補助部材３０は、複数の穴部３３を備え、接合補助部材３０の複数の穴部３３と、上板１０に設けられた複数の穴１１とが同軸上にそれぞれ配置され、接合補助部材３０の複数の穴部３３を溶接金属４０でそれぞれ充填すると共に、下板２０及び接合補助部材３０を溶接する。これにより、複数の接合部を設ける場合に、接合補助部材３０の配置の作業性を向上できる。 The upper plate 10 is provided with a plurality of holes 11, and the joining auxiliary member 30 includes a plurality of hole portions 33, and is provided in the plurality of hole portions 33 of the joining auxiliary member 30 and the upper plate 10. The plurality of holes 11 are arranged coaxially, and the plurality of holes 33 of the joining auxiliary member 30 are filled with the weld metal 40, and the lower plate 20 and the joining auxiliary member 30 are welded. Thereby, when providing a some junction part, workability | operativity of arrangement | positioning of the joining auxiliary member 30 can be improved.
　また、本実施形態の接合補助部材３０は、鋼製で、円形の穴部３３が形成される。これにより、接合補助部材３０は、上述した異材接合用アークスポット溶接法に好適に用いられる。 Further, the joining auxiliary member 30 of the present embodiment is made of steel, and a circular hole 33 is formed. Thereby, joining auxiliary member 30 is used suitably for the arc spot welding method for different material joining mentioned above.
　また、本実施形態の異材溶接継手１は、アルミニウム合金もしくはマグネシウム合金製の上板１０と、上板１０にアークスポット溶接された、鋼製の下板２０と、を備え、上板１０は、下板２０との重ね合わせ面に臨む穴１１を有し、円形の穴部３３が形成される鋼製の接合補助部材３０をさらに備え、接合補助部材３０は、穴部３３が上板１０に設けられた穴１１と同軸となるように上板１０上に配置され、接合補助部材３０の穴部３３は、鉄合金、または、Ｎｉ合金の溶接金属４０で充填されると共に、溶接金属４０と、溶融された下板２０及び接合補助部材３０の一部とによって溶融部Ｗが形成される。
　これにより、Ａｌ合金もしくはＭｇ合金の上板１０と鋼の下板２０とを備えた異材溶接継手１は、安価なアーク溶接設備を用いて、強固かつ信頼性の高い品質で接合され、かつ開断面構造にも閉断面構造にも制限無く適用できる。 Further, the dissimilar material welded joint 1 of the present embodiment includes an upper plate 10 made of an aluminum alloy or a magnesium alloy, and a steel lower plate 20 arc-welded to the upper plate 10. The steel plate further includes a steel joining auxiliary member 30 that has a hole 11 facing the overlapping surface with the lower plate 20 and is formed with a circular hole portion 33. The joining auxiliary member 30 has the hole portion 33 in the upper plate 10. It is arranged on the upper plate 10 so as to be coaxial with the provided hole 11, and the hole 33 of the joining auxiliary member 30 is filled with a weld metal 40 of iron alloy or Ni alloy, and with the weld metal 40. The melted portion W is formed by the melted lower plate 20 and a part of the joining auxiliary member 30.
As a result, the dissimilar welded joint 1 including the upper plate 10 of Al alloy or Mg alloy and the lower plate 20 of steel is joined with a strong and reliable quality using an inexpensive arc welding equipment and opened. The present invention can be applied to both a cross-sectional structure and a closed cross-sectional structure without limitation.
　尚、本発明は、前述した実施形態及び実施例に限定されるものではなく、適宜、変形、改良、等が可能である。 Note that the present invention is not limited to the above-described embodiments and examples, and modifications, improvements, and the like can be made as appropriate.
　ここで、以下の実施例Ａ～Ｄを用いて、本実施形態の有効性を確認した。 Here, the effectiveness of this embodiment was confirmed using the following Examples A to D.
＜実施例Ａ＞
　実施例Ａでは、上板１０を板厚１．６ｍｍのアルミニウム合金Ａ５０８３、下板２０を板厚１．４ｍｍの５９０ＭＰａ級高張力鋼板とした組合せの重ね継手を用いた。また、この重ね継手は、直径１．２ｍｍのＪＩＳ　Ｚ３３１２　ＹＧＷ１６の鋼製溶接ワイヤを用い、Ａｒ８０％＋ＣＯ２２０％の混合ガスをシールドガスとしたマグ溶接法にて、一定時間定点でのアーク溶接を行って接合された。 <Example A>
In Example A, a lap joint having a combination in which the upper plate 10 is an aluminum alloy A5083 having a plate thickness of 1.6 mm and the lower plate 20 is a 590 MPa class high-tensile steel plate having a plate thickness of 1.4 mm was used. In addition, this lap joint uses a JIS Z3312 YGW16 steel welding wire with a diameter of 1.2 mm, and arc welding at a fixed point for a fixed time by a mag welding method using a mixed gas of Ar 80% + CO 2 20% as a shielding gas. And joined.
　この溶接継手１に対して、ＪＩＳ　Ｚ３１３６「抵抗スポット及びプロジェクション　溶接継手のせん断試験に対する試験片寸法及び試験方法」、およびＪＩＳ　Ｚ３１３７「抵抗スポット及びプロジェクション溶接継手の十字引張試験」に従って、破壊試験を行った。ここでは、Ｚ３１３６の引張強度をＴＳＳとして表し、Ｚ３１３７の引張強度をＣＴＳとして表す。合否判定値として、ＴＳＳ≧８ｋＮ、ＣＴＳ≧５ｋＮとした。 The welded joint 1 is subjected to a destructive test according to JIS Z3136 “Test spot dimensions and test method for shear test of resistance spot and projection welded joint” and JIS Z3137 “Cross tensile test of resistance spot and projection welded joint”. It was. Here, the tensile strength of Z3136 is represented as TSS, and the tensile strength of Z3137 is represented as CTS. As the pass / fail judgment values, TSS ≧ 8 kN and CTS ≧ 5 kN.
　さらに、必須ではないが好ましい性能値として、溶接継手を塩水噴霧、乾燥、湿潤の順で繰り替えして加速腐食させるＪＡＳＯ－ＣＣＴ（Ｊａｐａｎｅｓｅ　Ａｕｔｏｍｏｂｉｌｅ　Ｓｔａｎｄａｒｄｓ　Ｏｒｇａｎｉｚａｔｉｏｎ　Ｃｙｃｌｉｃ　Ｃｏｒｒｏｓｉｏｎ　Ｔｅｓｔ）を２８日間実施し、その後同様に破壊試験を実施して、腐食後ＴＳＳおよび腐食後ＣＴＳを取得した。これら好ましい性能値の合格判定値は腐食無し試験の値に対し８０％以上とした。 Furthermore, as a preferable performance value, although not essential, JASO-CCT (Japane Automobile Standards Organization Corrosion Test) is carried out for 28 days, in which the welded joint is accelerated and corroded in the order of salt spray, drying and wetting. Destructive testing was performed to obtain post-corrosion TSS and post-corrosion CTS. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
　表１では、比較例をＮｏ．Ａ１～Ａ５、本実施例をＮｏ．Ａ６～Ａ１５に示す。 In Table 1, comparative example No. A1 to A5, this example No. Shown in A6 to A15.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　Ｎｏ．Ａ１は、接合補助部材を用いず、上板１０に穴も開けず、上板１０に対して直接アーク溶接を実施したものである。また、接着剤も用いていない。鋼製溶接ワイヤとアルミ母材が溶融混合するので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. A <b> 1 is obtained by performing arc welding directly on the upper plate 10 without using a joining auxiliary member and without making a hole in the upper plate 10. Also, no adhesive is used. Since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
　Ｎｏ．Ａ２は上板１０に直径７．０ｍｍの穴１１を設けるが、接合補助部材３０を用いないでアーク溶接を実施したものである。Ｎｏ．Ａ１に比べると溶接金属のアルミ混合量が低下するので、金属間化合物量が少なく、脆化度合も低いが、それでもなお低いＴＳＳ，ＣＴＳであった。 No. In A 2, a hole 11 having a diameter of 7.0 mm is provided in the upper plate 10, but arc welding is performed without using the joining auxiliary member 30. No. Compared with A1, the amount of aluminum mixed in the weld metal is reduced, so the amount of intermetallic compounds is small and the degree of embrittlement is low, but still TSS and CTS are low.
　Ｎｏ．Ａ３は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０の材質はＪＩＳ　Ｇ３１０６　ＳＭ４９０Ｃであり、外形形状が円形である（以降、実施例Ａの材質、外径形状は同じ）。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０と上板１０を貫通して下板２０まで溶け込ますことができず、溶接することができなかった。 No. A3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 which is not perforated and arc welding from above. The material of the joining auxiliary member 30 is JIS G3106 SM490C, and the outer shape is circular (hereinafter, the material of Example A and the outer diameter shape are the same). Here, the joining auxiliary member 30 is not perforated. As a result, the joining auxiliary member 30 and the upper plate 10 could not penetrate into the lower plate 20 and could not be welded.
　Ｎｏ．Ａ４は直径７．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０を貫通して下板２０まで溶け込ますことは何とかできたものの、下板２０の溶込み幅が非常に小さく、破壊試験をすると容易に破断した。 No. A4 is obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the hole 11 having a diameter of 7.0 mm is formed, and performing arc welding from the top. Here, the joining auxiliary member 30 is not perforated. As a result, although it was possible to somehow penetrate the joining auxiliary member 30 and melt into the lower plate 20, the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
　Ｎｏ．Ａ５は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には直径５．０ｍｍの穴開けをしている。この結果、溶接金属はＮｏ．Ａ１と同様に鋼製溶接ワイヤとアルミ母材が溶融混合したものになるので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. A5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above. The joining auxiliary member 30 has a hole having a diameter of 5.0 mm. As a result, the weld metal was No. As in A1, since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
　一方、Ｎｏ．Ａ６～Ａ１５は、直径７．０ｍｍの穴１１を穴開けをした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には本発明の範囲の適当な径の穴開けを施している。これらの試験体では形成される溶接金属４０のアルミ流入が接合補助部材３０の存在によりゼロもしくは極めて低く抑制され、高品質の溶接金属が形成される。さらに、下板２０の溶込みも十分大きくなり、また接合補助部材３０が上板１０の穴１１に対して広い面積を有する構造となっているため、十字引張試験ではすっぽ抜けが防げて高いＣＴＳも得られた。さらにまた、適切な箇所に金属用常温速硬化型２液混合接着材を塗布した試験体（Ａ７～Ａ９，Ａ１２～Ａ１４）では、アルミと鋼界面の電食を防ぐ作用があり、腐食によるＣＴＳやＴＳＳの低下が抑制されて、高い腐食後ＣＴＳ，ＴＳＳを示した。具体的にはＮｏ．Ａ６に対して、Ｎｏ．Ａ７、Ｎｏ．Ａ８、Ｎｏ．Ａ９と接着剤塗布箇所を増やすにつれ、腐食後ＴＳＳおよび腐食後ＣＴＳが順に高まっていることがわかる。 On the other hand, No. In A6 to A15, the joining auxiliary member 30 is placed on the upper plate 10 in which the hole 11 having a diameter of 7.0 mm is formed, and arc welding is performed thereon. The joining auxiliary member 30 is perforated with an appropriate diameter within the scope of the present invention. In these test bodies, the aluminum inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and a high-quality weld metal is formed. Further, the penetration of the lower plate 20 becomes sufficiently large, and the joining auxiliary member 30 has a structure having a wide area with respect to the hole 11 of the upper plate 10, so that it is possible to prevent slipping off in the cross tension test and is high. CTS was also obtained. Furthermore, the specimens (A7 to A9, A12 to A14) coated with a metal room temperature rapid-curing type two-component mixed adhesive at an appropriate location have the effect of preventing electrolytic corrosion at the aluminum / steel interface, and CTS caused by corrosion. And the decrease in TSS was suppressed, and high post-corrosion CTS and TSS were exhibited. Specifically, no. For A6, no. A7, No. A8, No. It can be seen that the post-corrosion TSS and the post-corrosion CTS increase in order as the number of A9 and adhesive application points increases.
＜実施例Ｂ＞
　実施例Ｂでは、上板１０を板厚０．８ｍｍのマグネシウム合金ＡＳＴＭ　ＡＺ３１Ｂ、下板２０を板厚１．０ｍｍの７８０ＭＰａ級高張力鋼板とした組合せの重ね継手を用いた。また、この重ね継手は、Ａｒ１００％ガスをシールドガスとして用いた交流ティグ溶接法にて、直径１．０ｍｍのＪＩＳ　Ｚ３３１６　ＹＧＴ５０の鋼製溶接ワイヤを非通電フィラーとして挿入しながら一定時間定点でのアーク溶接を行って接合した。 <Example B>
In Example B, a combination lap joint was used in which the upper plate 10 was a magnesium alloy ASTM AZ31B having a plate thickness of 0.8 mm, and the lower plate 20 was a 780 MPa class high strength steel plate having a plate thickness of 1.0 mm. In addition, this lap joint is an arc at a fixed point for a fixed time while inserting a steel welding wire of JIS Z3316 YGT50 having a diameter of 1.0 mm as a non-energized filler by an alternating current TIG welding method using Ar 100% gas as a shielding gas. Welded and joined.
　この溶接継手１に対して、ＪＩＳ　Ｚ３１３６およびＪＩＳ　Ｚ３１３７に従って、破壊試験を行った。ここではＺ３１３６の引張強度をＴＳＳとして表し、Ｚ３１３７の引張強度をＣＴＳと表す。合否判定値として、ＴＳＳ≧４ｋＮ、ＣＴＳ≧３ｋＮとした。 A destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137. Here, the tensile strength of Z3136 is represented as TSS, and the tensile strength of Z3137 is represented as CTS. As the pass / fail judgment values, TSS ≧ 4 kN and CTS ≧ 3 kN.
　さらに、必須ではないが好ましい性能値として、実施例Ａと同様に、溶接継手１に対してＪＡＳＯ－ＣＣＴを２８日間実施し、その後同様に破壊試験を実施して、腐食後ＴＳＳおよび腐食後ＣＴＳを取得した。これら好ましい性能値の合格判定値は腐食無し試験の値に対し８０％以上とした。 Further, as a preferable performance value that is not essential, as in Example A, JASO-CCT is performed on the welded joint 1 for 28 days, and then a destructive test is performed in the same manner to perform post-corrosion TSS and post-corrosion CTS. Acquired. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
　表２では、比較例をＮｏ．Ｂ１～Ｂ５、本実施例をＮｏ．Ｂ６～Ｂ１４に示す。 In Table 2, the comparative example No. B1 to B5, this example No. Shown in B6 to B14.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　Ｎｏ．Ｂ１は接合補助部材を用いず、上板１０に穴も開けず、上板１０に対して直接アーク溶接を実施したものである。接着剤も用いていない。鋼製溶接ワイヤとマグネシウム母材が溶融混合するので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. B1 does not use a joining auxiliary member, does not make a hole in the upper plate 10, and performs direct arc welding on the upper plate 10. No adhesive is used. Since the steel welding wire and the magnesium base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
　Ｎｏ．Ｂ２は上板１０に直径５．０ｍｍの穴１１を設けるが、接合補助部材を用いないでアーク溶接を実施したものである。Ｎｏ．Ｂ１に比べると溶接金属のマグネシウム合金混合量が低下するので、金属間化合物量が少なく、脆化度合も低いが、それでもなお低いＴＳＳ，ＣＴＳであった。 No. In B2, a hole 11 having a diameter of 5.0 mm is provided in the upper plate 10, but arc welding is performed without using a joining auxiliary member. No. Compared to B1, the amount of magnesium alloy mixed in the weld metal is reduced, so the amount of intermetallic compounds is small and the degree of embrittlement is low, but still TSS and CTS are low.
　Ｎｏ．Ｂ３は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０の材質はＪＩＳ　Ｇ３１０１　ＳＳ４００であり、外形形状が円形である（以降、実施例Ｂの材質、外径形状は同じ）。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０と上板１０を貫通して下板２０まで溶け込ますことは何とかできたものの、下板２０の溶込み幅が非常に小さく、破壊試験をすると容易に破断した。 No. B3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above. The material of the joining auxiliary member 30 is JIS G3101 SS400, and the outer shape is circular (hereinafter, the material of Example B and the outer diameter shape are the same). Here, the joining auxiliary member 30 is not perforated. As a result, although it was possible to somehow penetrate the joining auxiliary member 30 and the upper plate 10 and melt into the lower plate 20, the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
　Ｎｏ．Ｂ４は直径５．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０を貫通して下板２０まで溶け込ますことは何とかできたものの、下板２０の溶込み幅が非常に小さく、破壊試験をすると容易に破断した。 No. B4 is obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the hole 11 having a diameter of 5.0 mm is formed, and performing arc welding from the top. Here, the joining auxiliary member 30 is not perforated. As a result, although it was possible to somehow penetrate the joining auxiliary member 30 and melt into the lower plate 20, the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
　Ｎｏ．Ｂ５は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には直径３．８ｍｍの穴開けをしている。この結果、溶接金属はＮｏ．Ｂ１と同様に鋼製溶接ワイヤとマグネシウム合金母材が溶融混合したものになるので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. B5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above. The joining auxiliary member 30 is formed with a hole having a diameter of 3.8 mm. As a result, the weld metal was No. Similar to B1, since the steel welding wire and the magnesium alloy base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
　一方、Ｎｏ．Ｂ６～Ｂ１４は、直径５．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には本発明の範囲の適当な径の穴開けを施している。これらの試験体では形成される溶接金属４０のマグネシウム流入が接合補助部材３０の存在によりゼロもしくは極めて低く抑制され、高品質の溶接金属４０が形成される。さらに、下板２０の溶込みも十分大きくなり、また接合補助部材３０が上板１０の穴１１に対して広い面積を有する構造となっているため、十字引張試験ではすっぽ抜けが防げて高いＣＴＳも得られた。さらにまた、適切な箇所に接着材を塗布した試験体（Ｂ７～Ｂ１４）では、マグネシウム合金と鋼界面の電食を防ぐ作用があり、腐食によるＣＴＳやＴＳＳの低下が抑制されて、高い腐食後ＣＴＳ，ＴＳＳを示した。具体的にはＮｏ．Ｂ６に対して、Ｎｏ．Ｂ７、Ｎｏ．Ｂ８、Ｎｏ．Ｂ９と接着剤塗布箇所を増やすにつれ、腐食後ＴＳＳおよび腐食後ＣＴＳが順に高まっていることがわかる。 On the other hand, No. B6 to B14 are obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the hole 11 having a diameter of 5.0 mm is formed, and performing arc welding from the top. The joining auxiliary member 30 is perforated with an appropriate diameter within the scope of the present invention. In these test bodies, the magnesium inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and the high-quality weld metal 40 is formed. Further, the penetration of the lower plate 20 becomes sufficiently large, and the joining auxiliary member 30 has a structure having a wide area with respect to the hole 11 of the upper plate 10, so that it is possible to prevent slipping off in the cross tension test and is high. CTS was also obtained. Furthermore, the specimens (B7 to B14) coated with an adhesive at an appropriate location have the effect of preventing electrolytic corrosion at the magnesium alloy / steel interface, and the decrease in CTS and TSS due to corrosion is suppressed. CTS and TSS are shown. Specifically, no. For B6, no. B7, No. B8, No. It can be seen that the post-corrosion TSS and the post-corrosion CTS increase in order as the number of B9 and adhesive application points increases.
＜実施例Ｃ＞
　実施例Ｃでは、上板１０が板厚３．６ｍｍのアルミニウム合金Ａ６０６１、下板２０が板厚２．６ｍｍの４００ＭＰａ級鋼板とした組合せの重ね継手を用いた。また、重ね継手は、直径４．０ｍｍのＪＩＳ　Ｚ３２５２　ＥＣＮｉ－Ｃ１のＮｉ合金被覆アーク溶接棒を用いた被覆アーク溶接法にて、一定時間定点でのアーク溶接を行って接合した。なお、上板１０に穴開けを施した場合、下板２０の溶接箇所にポンチによる深絞り加工を行い、１．８ｍｍの高さ、すなわち上板１０に設けた穴１１の板厚中央まで入り込むように加工した。 <Example C>
In Example C, a combination lap joint was used in which the upper plate 10 was an aluminum alloy A6061 with a plate thickness of 3.6 mm, and the lower plate 20 was a 400 MPa class steel plate with a plate thickness of 2.6 mm. The lap joint was joined by arc welding at a fixed point for a fixed time by a coated arc welding method using a JIS Z3252 ECNi-C1 Ni alloy coated arc welding rod having a diameter of 4.0 mm. When the upper plate 10 is perforated, a deep drawing process using a punch is performed on the welded portion of the lower plate 20 to enter a height of 1.8 mm, that is, the center of the thickness of the hole 11 provided in the upper plate 10. Was processed as follows.
　この溶接継手１に対して、ＪＩＳ　Ｚ３１３６およびＪＩＳ　Ｚ３１３７に従って、破壊試験を行った。ここではＺ３１３６の引張強度をＴＳＳとして表し、Ｚ３１３７の引張強度をＣＴＳと表す。合否判定値として、ＴＳＳ≧９ｋＮ、ＣＴＳ≧６ｋＮとした。 A destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137. Here, the tensile strength of Z3136 is represented as TSS, and the tensile strength of Z3137 is represented as CTS. As the pass / fail judgment values, TSS ≧ 9 kN and CTS ≧ 6 kN.
　さらに、必須ではないが好ましい性能値として、実施例Ａ、Ｂと同様に、溶接継手１に対して、ＪＡＳＯ－ＣＣＴを２８日間実施し、その後同様に破壊試験を実施して、腐食後ＴＳＳおよび腐食後ＣＴＳを取得した。これら好ましい性能値の合格判定値は腐食無し試験の値に対し８０％以上とした。 Furthermore, as a preferable performance value, although not essential, as in Examples A and B, JASO-CCT was performed on welded joint 1 for 28 days, and then a destructive test was performed in the same manner. CTS was obtained after corrosion. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
　表３では、比較例をＮｏ．Ｃ１～Ｃ５、本実施例をＮｏ．Ｃ６～Ｃ１２に示す。 In Table 3, the comparative example No. C1 to C5, this example No. Shown in C6 to C12.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　Ｎｏ．Ｃ１は接合補助部材を用いず、上板１０に穴も開けず、上板１０に対して直接アーク溶接を実施したものである。接着剤も用いていない。Ｎｉ合金溶接棒とアルミニウム母材が溶融混合するので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. C1 does not use a joining auxiliary member, does not make a hole in the upper plate 10, and performs arc welding directly on the upper plate 10. No adhesive is used. Since the Ni alloy welding rod and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, and had low TSS and CTS.
　Ｎｏ．Ｃ２は上板１０に直径９．０ｍｍの穴１１を設けるが、接合補助部材３０を用いないでアーク溶接を実施したものである。Ｎｏ．Ｃ１に比べると溶接金属のアルミニウム合金混合量が低下するので、金属間化合物量が少なく、脆化度合も低いが、それでもなお低いＴＳＳ，ＣＴＳであった。 No. In C2, a hole 11 having a diameter of 9.0 mm is provided in the upper plate 10, but arc welding is performed without using the joining auxiliary member 30. No. Compared to C1, the amount of aluminum alloy mixed in the weld metal decreases, so the amount of intermetallic compounds is small and the degree of embrittlement is low, but still TSS and CTS are low.
　Ｎｏ．Ｃ３は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０の材質はＪＩＳ　Ｇ４０５１　Ｓ１２Ｃであり、外径形状は角丸正方形である（以降、実施例Ｃの材質、外径形状は同じ）。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０と上板１０を貫通して下板２０まで溶け込ますことができず、溶接することができなかった。 No. C3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above. The material of the joining auxiliary member 30 is JIS G4051 S12C, and the outer diameter shape is a rounded square (hereinafter, the material of Example C and the outer diameter shape are the same). Here, the joining auxiliary member 30 is not perforated. As a result, the joining auxiliary member 30 and the upper plate 10 could not penetrate into the lower plate 20 and could not be welded.
　Ｎｏ．Ｃ４は直径９．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。なお、ここでは接合補助部材３０には穴開けをしていない。この結果、接合補助部材３０を貫通して下板２０まで溶け込ますことは何とかできたものの、下板２０の溶込み幅が非常に小さく、破壊試験をすると容易に破断した。 No. C4 is obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the hole 11 having a diameter of 9.0 mm is formed, and performing arc welding from the top. Here, the joining auxiliary member 30 is not perforated. As a result, although it was possible to somehow penetrate the joining auxiliary member 30 and melt into the lower plate 20, the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
　Ｎｏ．Ｃ５は穴開けをしていない上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には直径７．０ｍｍの穴開けをしている。この結果、溶接金属はＮｏ．Ｃ１と同様にＮｉ合金溶接棒とマグネシウム合金母材が溶融混合したものになるので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. C5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 which is not perforated and arc welding from above. The joining auxiliary member 30 has a diameter of 7.0 mm. As a result, the weld metal was No. Similar to C1, since the Ni alloy welding rod and the magnesium alloy base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
　一方、Ｎｏ．Ｃ６～Ｃ１２は、直径９．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には本発明の範囲の適切な径の穴開けを施している。これらの試験体では形成される溶接金属のアルミ流入が接合補助部材３０の存在によりゼロもしくは極めて低く抑制され、高品質の溶接金属が形成される。さらに、下板２０の溶込みも十分大きくなり、また接合補助部材３０が上板１０の穴１１に対して広い面積を有する構造となっているため、十字引張試験ではすっぽ抜けが防げて高いＣＴＳも得られた。上板１０の板厚は３．６ｍｍと比較的厚いが、下板２０の深絞り加工によって溶接箇所では接合補助部材３０と下板２０間の距離が小さくなり、溶接能率の向上や溶落ち防止効果が得られた。さらにまた、適切な箇所に接着材を塗布した試験体（Ｎｏ．Ｃ７～Ｃ１１）では、アルミと鋼界面の電食を防ぐ作用があり、腐食によるＣＴＳやＴＳＳの低下が抑制されて、高い腐食後ＣＴＳ，ＴＳＳを示した。 On the other hand, No. C6 to C12 are obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the hole 11 having a diameter of 9.0 mm is formed, and performing arc welding from the top. The joining auxiliary member 30 is drilled with an appropriate diameter within the scope of the present invention. In these specimens, the aluminum inflow of the weld metal formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and a high quality weld metal is formed. Further, the penetration of the lower plate 20 becomes sufficiently large, and the joining auxiliary member 30 has a structure having a wide area with respect to the hole 11 of the upper plate 10, so that it is possible to prevent slipping off in the cross tension test and is high. CTS was also obtained. Although the plate thickness of the upper plate 10 is relatively thick at 3.6 mm, the distance between the joining auxiliary member 30 and the lower plate 20 is reduced at the welded portion by deep drawing of the lower plate 20, improving the welding efficiency and preventing the falling-off. The effect was obtained. Furthermore, the test specimens (No. C7 to C11) coated with an adhesive at appropriate locations have the effect of preventing electrolytic corrosion at the aluminum / steel interface, and the decrease in CTS and TSS due to corrosion is suppressed, resulting in high corrosion. Post CTS and TSS were shown.
＜実施例Ｄ＞
　実施例Ｄでは、上板１０が板厚１．２ｍｍのアルミニウム合金Ａ６Ｎ０１、下板２０が板厚１．２ｍｍのＳＰＣＣ鋼板とした組合せの重ね継手を用いた。また、重ね継手は、直径１．２ｍｍのＪＩＳ　Ｚ３３１３　Ｔ４９Ｔ１４－０ＮＳ－Ｇの鋼製フラックス入りワイヤを用いたセルフシールドアーク溶接法にて、一定時間定点でのアーク溶接を行って接合した。 <Example D>
In Example D, a combination lap joint was used in which the upper plate 10 was an aluminum alloy A6N01 having a plate thickness of 1.2 mm, and the lower plate 20 was an SPCC steel plate having a plate thickness of 1.2 mm. The lap joint was joined by performing arc welding at a fixed point for a fixed time by a self-shielded arc welding method using a JIS Z3313 T49T14-0NS-G steel flux cored wire having a diameter of 1.2 mm.
　この溶接継手１に対して、ＪＩＳ　Ｚ３１３６およびＪＩＳ　Ｚ３１３７に従って、破壊試験を行った。ここではＺ３１３６の引張強度をＴＳＳとして表し、Ｚ３１３７の引張強度をＣＴＳと表す。合否判定値として、ＴＳＳ≧６ｋＮ、ＣＴＳ≧４ｋＮとした。 A destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137. Here, the tensile strength of Z3136 is represented as TSS, and the tensile strength of Z3137 is represented as CTS. As the pass / fail judgment values, TSS ≧ 6 kN and CTS ≧ 4 kN.
　さらに、必須ではないが好ましい性能値として、実施例Ａ，Ｂ，Ｃと同様に、溶接継手１に対して、ＪＡＳＯ－ＣＣＴを２８日間実施し、その後同様に破壊試験を実施して、腐食後ＴＳＳおよび腐食後ＣＴＳを取得した。これら好ましい性能値の合格判定値は腐食無し試験の値に対し８０％以上とした。 Further, although not essential, as a preferable performance value, as in Examples A, B, and C, JASO-CCT was performed on welded joint 1 for 28 days, and then a destructive test was performed in the same manner. TSS and post-corrosion CTS were obtained. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
　表４では、比較例をＮｏ．Ｄ１～Ｄ２、本実施例をＮｏ．Ｄ３～Ｄ４に示す。 In Table 4, the comparative example No. D1 to D2, this example No. Shown in D3 to D4.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　Ｎｏ．Ｄ１は接合補助部材を用いず、上板１０に穴も開けず、上板１０に対して直接アーク溶接を実施したものである。接着剤も用いていない。鋼製溶接ワイヤとアルミニウム母材が溶融混合するので、形成された溶接金属は極めて脆い金属間化合物となり、低いＴＳＳ，ＣＴＳとなった。 No. D <b> 1 is obtained by performing arc welding directly on the upper plate 10 without using a joining auxiliary member and without making a hole in the upper plate 10. No adhesive is used. Since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, and had low TSS and CTS.
　Ｎｏ．Ｄ２は上板１０に直径６．０ｍｍの穴１１を設けるが、接合補助部材３０を用いないでアーク溶接を実施したものである。Ｎｏ．Ｄ１に比べると溶接金属のアルミニウム合金混合量が低下するので、金属間化合物量が少なく、脆化度合も低いが、それでもなお低いＴＳＳ，ＣＴＳであった。 No. D2 is a hole 11 having a diameter of 6.0 mm provided on the upper plate 10, but arc welding is performed without using the joining auxiliary member 30. No. Compared with D1, since the amount of aluminum alloy mixed in the weld metal decreases, the amount of intermetallic compounds is small and the degree of embrittlement is low, but still TSS and CTS are low.
　一方、Ｎｏ．Ｄ３～Ｄ４は、直径６．０ｍｍの穴１１を穴開けした上板１０の上に、ＪＩＳ　Ｇ３１０６　ＳＭ４９０Ａ材を加工した接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には本発明の範囲の適切な径の穴開けを施しており、外形形状が八角形である。これらの試験体では形成される溶接金属４０のアルミ流入が接合補助部材３０の存在によりゼロもしくは極めて低く抑制され、高品質の溶接金属４０が形成される。さらに、下板２０の溶込みも十分大きくなり、また接合補助部材３０が上板１０の穴１１に対して広い面積を有する構造となっているため、十字引張試験ではすっぽ抜けが防げて高いＣＴＳも得られた。さらにまた、適切な箇所に接着材を塗布した試験体Ｎｏ．Ｄ４では、アルミと鋼界面の電食を防ぐ作用があり、腐食によるＣＴＳやＴＳＳの低下が抑制されて、接着材無しの試験体Ｎｏ．Ｄ３に比べて高い腐食後ＣＴＳ，ＴＳＳを示した。 On the other hand, No. D3 to D4 are obtained by placing the joining auxiliary member 30 obtained by processing the JIS G3106 SM490A material on the upper plate 10 in which the hole 11 having a diameter of 6.0 mm is formed, and performing arc welding from the top. The joining auxiliary member 30 is perforated with an appropriate diameter within the scope of the present invention, and the outer shape is an octagon. In these test bodies, the aluminum inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and the high-quality weld metal 40 is formed. Further, the penetration of the lower plate 20 becomes sufficiently large, and the joining auxiliary member 30 has a structure having a wide area with respect to the hole 11 of the upper plate 10, so that it is possible to prevent slipping off in the cross tension test and is high. CTS was also obtained. Furthermore, the test body No. which applied the adhesive material to an appropriate location. D4 has the effect of preventing electrolytic corrosion at the aluminum / steel interface, and the decrease in CTS and TSS due to corrosion is suppressed. Higher post-corrosion CTS and TSS than D3.
＜実施例Ｅ＞
　実施例Ｅでは、上板１０を板厚４．０ｍｍのアルミニウム合金Ａ７Ｎ０１、下板２０を板厚３．０ｍｍの１１８０ＭＰａ級高張力鋼板とした組合せの重ね継手を用いた。下板２０の溶接すべき箇所には、ポンチによる絞り加工により高さ１．５ｍｍの膨出部２１を形成し、上板１０に設けた穴１１に入り込むように配置した。また、この重ね継手は、直径１．２ｍｍのＪＩＳ　Ｚ３３２１　ＹＳ３０９Ｌのステンレス鋼製溶接ワイヤを用い、シールドガス：Ａｒ９９％＋Ｈ２１％、プラズマガス：Ａｒ１００％としたプラズマアーク溶接法にて、一定時間定点でのアーク溶接を行って接合された。 <Example E>
In Example E, a combination lap joint was used in which the upper plate 10 was an aluminum alloy A7N01 having a plate thickness of 4.0 mm, and the lower plate 20 was a 1180 MPa class high-tensile steel plate having a plate thickness of 3.0 mm. A bulging portion 21 having a height of 1.5 mm was formed at a place to be welded on the lower plate 20 by drawing with a punch, and arranged so as to enter the hole 11 provided in the upper plate 10. In addition, this lap joint uses a JIS Z3321 YS309L stainless steel welding wire with a diameter of 1.2 mm and is shielded by plasma arc welding using Ar 99% + H 2 1% and plasma gas Ar 100% for a certain period of time. Joined by arc welding at a fixed point.
　この溶接継手１に対して、ＪＩＳ　Ｚ３１３６「抵抗スポット及びプロジェクション　溶接継手のせん断試験に対する試験片寸法及び試験方法」、およびＪＩＳ　Ｚ３１３７「抵抗スポット及びプロジェクション溶接継手の十字引張試験」に従って、破壊試験を行った。ここでは、Ｚ３１３６の引張強度をＴＳＳとして表し、Ｚ３１３７の引張強度をＣＴＳとして表す。合否判定値として、ＴＳＳ≧１０ｋＮ、ＣＴＳ≧８ｋＮとした。 The welded joint 1 is subjected to a destructive test according to JIS Z3136 “Test spot dimensions and test method for shear test of resistance spot and projection welded joint” and JIS Z3137 “Cross tensile test of resistance spot and projection welded joint”. It was. Here, the tensile strength of Z3136 is represented as TSS, and the tensile strength of Z3137 is represented as CTS. As the pass / fail judgment values, TSS ≧ 10 kN and CTS ≧ 8 kN.
　さらに、必須ではないが好ましい性能値として、実施例Ａ～Ｄと同様に、溶接継手１に対して、ＪＡＳＯ－ＣＣＴを２８日間実施し、その後同様に破壊試験を実施して、腐食後ＴＳＳおよび腐食後ＣＴＳを取得した。これら好ましい性能値の合格判定値は腐食無し試験の値に対し８０％以上とした。 Furthermore, as a preferable performance value, although not essential, as in Examples A to D, JASO-CCT was performed on welded joint 1 for 28 days, and then a destructive test was performed in the same manner, and after corrosion, TSS and CTS was obtained after corrosion. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
　本実施例をＮｏ．Ｅ１～Ｅ３に示す。 This example is No. Shown at E1 to E3.
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
　Ｎｏ．Ｅ１～Ｅ３は、直径１１．０ｍｍの穴１１を穴開けした上板１０の上に接合補助部材３０を載せて、その上からアーク溶接したものである。接合補助部材３０には本発明の範囲の適当な径の穴開けを施している。これらの試験体では形成される溶接金属のアルミ流入が接合補助部材３０の存在によりゼロもしくは極めて低く抑制され、高品質の溶接金属が形成される。さらに、下板２０の溶込みも十分大きくなり、また接合補助部材３０が上板１０の穴１１に対して広い面積を有する構造となっているため、十字引張試験ではすっぽ抜けが防げて高いＣＴＳも得られた。さらにまた、適切な箇所に金属用常温速硬化型２液混合接着材を塗布した試験体（Ｅ１，Ｅ３）では、アルミと鋼界面の電食を防ぐ作用があり、腐食によるＣＴＳやＴＳＳの低下が抑制されて、高い腐食後ＣＴＳ，ＴＳＳを示した。具体的にはＮｏ．Ｅ２に対して、Ｎｏ．Ｅ３は接着剤塗布しており、腐食後ＴＳＳおよび腐食後ＣＴＳが高まっていることがわかる。 No. E1 to E3 are obtained by placing the joining auxiliary member 30 on the upper plate 10 in which the holes 11 having a diameter of 11.0 mm are formed, and arc welding from above. The joining auxiliary member 30 is perforated with an appropriate diameter within the scope of the present invention. In these specimens, the aluminum inflow of the weld metal formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and a high quality weld metal is formed. Further, the penetration of the lower plate 20 becomes sufficiently large, and the joining auxiliary member 30 has a structure having a wide area with respect to the hole 11 of the upper plate 10, so that it is possible to prevent slipping off in the cross tension test and is high. CTS was also obtained. In addition, the specimens (E1, E3) coated with a metal room temperature fast-curing type two-component mixed adhesive at an appropriate location have the effect of preventing electrolytic corrosion at the aluminum / steel interface, resulting in a decrease in CTS and TSS due to corrosion. Was suppressed, indicating high post-corrosion CTS and TSS. Specifically, no. For E2, no. It can be seen that E3 is coated with an adhesive and TSS after corrosion and CTS after corrosion are increased.
　本出願は、２０１６年８月２９日出願の日本特許出願２０１６－１６６８４０に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on Japanese Patent Application No. 2016-166840 filed on Aug. 29, 2016, the contents of which are incorporated herein by reference.
１０  　上板
１１  　穴
２０  　下板
３０  　接合補助部材
３３  　穴部
４０  　溶接金属
Ｗ    　溶融部
Ｗａ  　余盛り
  DESCRIPTION OF SYMBOLS 10 Upper plate 11 Hole 20 Lower plate 30 Joining auxiliary member 33 Hole 40 Weld metal W Melting part Wa Extra pile

Claims (20)

  1. 　アルミニウム合金もしくはマグネシウム合金製の第１の板と、鋼製の第２の板と、を接合する異材接合用アークスポット溶接法であって、
    　前記第１の板に穴を空ける工程と、
    　前記第１の板と前記第２の板を重ね合わせる工程と、
    　円形の穴部が形成される鋼製の接合補助部材を、該穴部が前記第１の板に設けられた穴と同軸となるように前記第１の板上に配置する工程と、
    　以下の（ａ）～（ｄ）のいずれかの手法によって、前記接合補助部材の穴部を溶接金属で充填すると共に、前記第１の板の穴内の前記溶接金属を介して前記第２の板及び前記接合補助部材を溶接する工程と、
    を備える異材接合用アークスポット溶接法。
    （ａ）鉄合金、または、Ｎｉ合金の前記溶接金属が得られる溶接ワイヤを溶極として用いるガスシールドアーク溶接法。
    （ｂ）前記溶接ワイヤを溶極として用いるノンガスアーク溶接法。
    （ｃ）前記溶接ワイヤを非溶極フィラーとして用いるガスタングステンアーク溶接法。
    （ｄ）前記溶接ワイヤを非溶極フィラーとして用いるプラズマアーク溶接法。
    （ｅ）鉄合金、または、Ｎｉ合金の前記溶接金属が得られる被覆アーク溶接棒を溶極として用いる被覆アーク溶接法。     An arc spot welding method for joining different materials to join a first plate made of an aluminum alloy or a magnesium alloy and a second plate made of steel,
    Drilling a hole in the first plate;
    Superimposing the first plate and the second plate;
    Arranging a steel joining auxiliary member in which a circular hole is formed on the first plate such that the hole is coaxial with a hole provided in the first plate;
    The hole of the joining auxiliary member is filled with a weld metal by any of the following methods (a) to (d), and the second plate is inserted through the weld metal in the hole of the first plate. And welding the joining auxiliary member;
    Arc spot welding method for dissimilar materials joining.
    (A) A gas shielded arc welding method using a welding wire from which an iron alloy or Ni alloy weld metal is obtained as a melting electrode.
    (B) Non-gas arc welding method using the welding wire as a melting electrode.
    (C) Gas tungsten arc welding method using the welding wire as a non-melting electrode filler.
    (D) A plasma arc welding method using the welding wire as a non-melting electrode filler.
    (E) A coated arc welding method in which a coated arc welding rod from which the weld metal of an iron alloy or Ni alloy is obtained is used as a melting electrode.
  2. 　前記第２の板には、絞り加工により膨出部が形成されており、
    　前記重ね合わせ工程において、前記第２の板の膨出部が、前記第１の板の穴内に配置される、請求項１に記載の異材接合用アークスポット溶接法。     The second plate has a bulge formed by drawing,
    The arc spot welding method for dissimilar material joining according to claim 1, wherein in the overlapping step, the bulging portion of the second plate is disposed in the hole of the first plate.
  3. 　前記重ね合わせ工程の前に、前記第１の板と前記第２の板の少なくとも一方の重ね合せ面には、前記穴の周囲に、全周に亘って接着剤を塗布する工程を、さらに備える、請求項１に記載の異材接合用アークスポット溶接法。 Before the superposition step, the method further comprises a step of applying an adhesive over the entire circumference of the at least one superposition surface of the first plate and the second plate around the hole. The arc spot welding method for joining dissimilar materials according to claim 1.
  4. 　前記配置工程において、前記接合補助部材と、該接合補助部材と対向する前記第１の板との間の少なくとも一方の対向面に、接着剤を塗布する、請求項１に記載の異材接合用アークスポット溶接法。 The arc for dissimilar material joining according to claim 1, wherein an adhesive is applied to at least one opposing surface between the joining auxiliary member and the first plate facing the joining auxiliary member in the arranging step. Spot welding method.
  5. 　前記配置工程の際、又は、前記充填溶接工程後に、前記接合補助部材と、前記第１の板の表面との境界部に接着剤を塗布する、請求項１に記載の異材接合用アークスポット溶接法。 2. The spot spot welding for dissimilar material joining according to claim 1, wherein an adhesive is applied to a boundary portion between the joining auxiliary member and the surface of the first plate during the arranging step or after the filling welding step. Law.
  6. 　前記接合補助部材の穴部の直径ＰSは、前記第１の板の穴の直径ＢＤに対し５０％以上１００％以下である、請求項１に記載の異材接合用アークスポット溶接法。 2. The arc spot welding method for joining dissimilar materials according to claim 1, wherein a diameter P S of the hole portion of the joining auxiliary member is 50% or more and 100% or less with respect to a diameter BD of the hole of the first plate.
  7. 　前記接合補助部材の外形寸法ＰＤは、前記第１の板の穴の直径ＢＤに対し１０５％以上である、請求項１に記載の異材接合用アークスポット溶接法。 The external dimension P D of the auxiliary bonding member, wherein at 105% or more relative to the diameter B D of the hole of the first plate, dissimilar metals joint for arc spot welding method of claim 1.
  8. 　前記接合補助部材の厚さＰＨは、前記第１の板の板厚ＢＨの５０％以上１５０％以下である、請求項１に記載の異材接合用アークスポット溶接法。 2. The arc spot welding method for dissimilar material joining according to claim 1, wherein a thickness P H of the joining auxiliary member is 50% or more and 150% or less of a plate thickness B H of the first plate.
  9. 　前記充填溶接工程において、前記接合補助部材の表面上に余盛りが形成され、かつ前記余盛りの直径ＷＤが、前記接合補助部材の穴部の直径ＰＳに対し、１０５％以上となる、
    請求項１に記載の異材接合用アークスポット溶接法。     In the filling welding process, the excess prime on the surface of the bonding auxiliary member is formed, and the diameter W D of the excess prime is to the diameter P S of the hole of the joining auxiliary member becomes 105% or more,
    The arc spot welding method for joining dissimilar materials according to claim 1.
  10. 　前記第１の板には、複数の前記穴が空けられると共に、前記接合補助部材は、複数の前記穴部を備え、
    　前記接合補助部材の前記複数の穴部と、前記第１の板に設けられた前記複数の穴とが同軸上にそれぞれ配置され、
    　前記接合補助部材の前記複数の穴部を溶接金属でそれぞれ充填すると共に、前記第１の板の穴内の前記溶接金属を介して前記第２の板及び前記接合補助部材を溶接する、請求項１に記載の異材接合用アークスポット溶接法。     The first plate has a plurality of holes, and the joining auxiliary member includes a plurality of holes.
    The plurality of holes of the joining auxiliary member and the plurality of holes provided in the first plate are arranged coaxially, respectively.
    The plurality of holes of the joining auxiliary member are filled with weld metal, respectively, and the second plate and the joining auxiliary member are welded through the weld metal in the hole of the first plate. Arc spot welding method for joining dissimilar materials as described in 1.
  11. 　請求項１～１０のいずれか１項に記載の異材接合用アークスポット溶接法に用いられ、
    　鋼製で、円形の穴部が形成される、接合補助部材。     The arc spot welding method for joining different materials according to any one of claims 1 to 10,
    A joining auxiliary member made of steel and formed with a circular hole.
  12. 　アルミニウム合金もしくはマグネシウム合金製の第１の板と、該第１の板にアークスポット溶接された、鋼製の第２の板と、を備える異材溶接継手であって、
    　前記第１の板は、前記第２の板との重ね合わせ面に臨む穴を有し、
    　円形の穴部が形成される鋼製の接合補助部材をさらに備え、
    　前記接合補助部材は、前記穴部が前記第１の板に設けられた穴と同軸となるように前記第１の板上に配置され、
    　前記接合補助部材の穴部は、鉄合金、または、Ｎｉ合金の溶接金属で充填されると共に、前記溶接金属と、溶融された前記第２の板及び前記接合補助部材の一部とによって溶融部が形成される、異材溶接継手。     A dissimilar material welded joint comprising a first plate made of an aluminum alloy or a magnesium alloy, and a second plate made of steel arc-welded to the first plate,
    The first plate has a hole facing the overlapping surface with the second plate,
    It further comprises a steel joining auxiliary member in which a circular hole is formed,
    The joining auxiliary member is disposed on the first plate so that the hole portion is coaxial with a hole provided in the first plate,
    The hole portion of the joining auxiliary member is filled with a weld metal of an iron alloy or an Ni alloy, and is melted by the weld metal, the melted second plate, and a part of the joining auxiliary member. Dissimilar material welded joint is formed.
  13. 　前記第１の板の穴内には、前記第２の板に形成された膨出部が配置される、請求項１２に記載の異材溶接継手。 The dissimilar material welded joint according to claim 12, wherein a bulging portion formed on the second plate is disposed in the hole of the first plate.
  14. 　前記第１の板と前記第２の板の少なくとも一方の前記重ね合せ面には、前記穴の周囲に、全周に亘って設けられた接着剤を備える、請求項１２に記載の異材溶接継手。 The dissimilar material welded joint according to claim 12, wherein the overlapping surface of at least one of the first plate and the second plate is provided with an adhesive provided over the entire circumference around the hole. .
  15. 　前記接合補助部材と、該接合補助部材と対向する前記第１の板との間の少なくとも一方の対向面に設けられた接着剤を備える、請求項１２に記載の異材溶接継手。 The dissimilar material welded joint according to claim 12, comprising an adhesive provided on at least one facing surface between the joining auxiliary member and the first plate facing the joining auxiliary member.
  16. 　前記接合補助部材と、前記第１の板の表面との境界部に設けられた接着剤を備える、請求項１２に記載の異材溶接継手。 The dissimilar material welded joint according to claim 12, comprising an adhesive provided at a boundary portion between the joining auxiliary member and the surface of the first plate.
  17. 　前記接合補助部材の穴部の直径ＰSは、前記第１の板の穴の直径ＢＤに対し５０％以上１００％以下である、請求項１２に記載の異材溶接継手。 13. The dissimilar material welded joint according to claim 12, wherein a diameter P S of the hole portion of the joining auxiliary member is 50% or more and 100% or less with respect to a diameter BD of the hole of the first plate.
  18. 　前記接合補助部材の外形寸法ＰＤは、前記第１の板の穴の直径ＢＤに対し１０５％以上である、請求項１２に記載の異材溶接継手。 The dissimilar material welded joint according to claim 12, wherein an outer dimension P D of the joining auxiliary member is 105% or more with respect to a diameter B D of the hole of the first plate.
  19. 　前記接合補助部材の厚さＰＨは、前記第１の板の板厚ＢＨの５０％以上１５０％以下である、請求項１２に記載の異材溶接継手。 The thickness P H of the auxiliary bonding member, the first is less than 150% more than 50% of the thickness B H of the plate, dissimilar weld joint according to claim 12.
  20. 　前記接合補助部材の表面上に余盛りが形成され、かつ前記余盛りの直径ＷＤが、前記接合補助部材の穴部の直径ＰＳに対し、１０５％以上となる、請求項１２に記載の異材溶接継手。 The formed excess prime on the surface of the auxiliary bonding member, and the diameter W D of the excess prime is to the diameter P S of the hole of the joining auxiliary member becomes 105% or more, according to claim 12 Dissimilar material welded joint.
PCT/JP2016/079766 2016-08-29 2016-10-06 Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint WO2018042680A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016166840A JP2018034166A (en) 2016-08-29 2016-08-29 Arc spot-welding method for jointing different materials, joint assisting member, and different-material welded joint
JP2016-166840 2016-08-29

Publications (1)

Publication Number Publication Date
WO2018042680A1 true WO2018042680A1 (en) 2018-03-08

Family

ID=61300258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/079766 WO2018042680A1 (en) 2016-08-29 2016-10-06 Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint

Country Status (2)

Country Link
JP (1) JP2018034166A (en)
WO (1) WO2018042680A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020213492A1 (en) * 2019-04-19 2020-10-22 パナソニックＩｐマネジメント株式会社 Joining structure
WO2020213491A1 (en) * 2019-04-19 2020-10-22 パナソニックＩｐマネジメント株式会社 Junction structure
US20200398519A1 (en) * 2018-03-05 2020-12-24 Shinwa Controls Co., Ltd Honeycomb panel, manufacturing method thereof, and housing
CN112518080A (en) * 2019-09-18 2021-03-19 发那科株式会社 Welding tool for robot and robot
CN116000455A (en) * 2022-12-30 2023-04-25 大连理工大学 Overlap welding method for magnesium/steel heterogeneous metal electronic device structure
EP4338879A1 (en) * 2022-08-18 2024-03-20 Volkswagen Ag Method for plug welding
CN116000455B (en) * 2022-12-30 2024-05-10 大连理工大学 Overlap welding method for magnesium/steel heterogeneous metal electronic device structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6740287B2 (en) 2018-07-05 2020-08-12 ファナック株式会社 Tool for joining dissimilar metals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112654A (en) * 1981-12-25 1983-07-05 Toyota Motor Corp Positioning method for arc spot welding
JPH0821376A (en) * 1994-07-08 1996-01-23 Mitsubishi Electric Corp Scroll compressor
JP2010155275A (en) * 2008-12-26 2010-07-15 Sango Co Ltd Weld joint and method for manufacturing the same
JP2014226698A (en) * 2013-05-22 2014-12-08 株式会社神戸製鋼所 Rivet joint structure and method of manufacturing the same
JP2015167972A (en) * 2014-03-07 2015-09-28 株式会社神戸製鋼所 Manufacturing method of dissimilar joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112654A (en) * 1981-12-25 1983-07-05 Toyota Motor Corp Positioning method for arc spot welding
JPH0821376A (en) * 1994-07-08 1996-01-23 Mitsubishi Electric Corp Scroll compressor
JP2010155275A (en) * 2008-12-26 2010-07-15 Sango Co Ltd Weld joint and method for manufacturing the same
JP2014226698A (en) * 2013-05-22 2014-12-08 株式会社神戸製鋼所 Rivet joint structure and method of manufacturing the same
JP2015167972A (en) * 2014-03-07 2015-09-28 株式会社神戸製鋼所 Manufacturing method of dissimilar joint

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200398519A1 (en) * 2018-03-05 2020-12-24 Shinwa Controls Co., Ltd Honeycomb panel, manufacturing method thereof, and housing
WO2020213492A1 (en) * 2019-04-19 2020-10-22 パナソニックＩｐマネジメント株式会社 Joining structure
WO2020213491A1 (en) * 2019-04-19 2020-10-22 パナソニックＩｐマネジメント株式会社 Junction structure
CN113692328A (en) * 2019-04-19 2021-11-23 松下知识产权经营株式会社 Joint structure
CN112518080A (en) * 2019-09-18 2021-03-19 发那科株式会社 Welding tool for robot and robot
US11911855B2 (en) 2019-09-18 2024-02-27 Fanuc Corporation Welding tool for robot and robot
EP4338879A1 (en) * 2022-08-18 2024-03-20 Volkswagen Ag Method for plug welding
CN116000455A (en) * 2022-12-30 2023-04-25 大连理工大学 Overlap welding method for magnesium/steel heterogeneous metal electronic device structure
CN116000455B (en) * 2022-12-30 2024-05-10 大连理工大学 Overlap welding method for magnesium/steel heterogeneous metal electronic device structure

Also Published As

Publication number Publication date
JP2018034166A (en) 2018-03-08

Similar Documents

Publication Publication Date Title
JP6461056B2 (en) Arc spot welding method for joining dissimilar materials, joining auxiliary member, and dissimilar material welding joint
WO2018042680A1 (en) Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint
WO2018123716A1 (en) Arc welding method for multimaterial joining, joining assistance member, multimaterial welded joint, and plate material equipped with joining assistance member
WO2018056172A1 (en) Spot welding method for joining different materials, joining assistance member, and different material welded joint
WO2019167502A1 (en) Arc welding method for dissimilar material bonding
JP2018103240A (en) Arc-welding method for joining dissimilar materials, joining auxiliary member, dissimilar material weld joint, and plate with joining auxiliary member
JP2008105087A (en) Joining method of iron member with aluminum member, and iron-aluminum joined structure
WO2020100426A1 (en) Welding method for bonding dissimilar materials, bonding auxiliary member, and dissimilar material welded joint
WO2018055982A1 (en) Arc welding method for joining different materials, joining assistance member, and different material welded joint
WO2018042682A1 (en) Arc-welding method for joining different materials, joining auxiliary member, and different materials welding joint
WO2018042681A1 (en) Arc-spot welding method for joining different materials, joining auxiliary member, and different materials welding joint
JP2018103241A (en) Arc-welding method for joining dissimilar materials, joining auxiliary member, dissimilar material weld joint, and plate with joining auxiliary member
JP6999015B2 (en) Arc welding method for joining dissimilar materials
WO2021210322A1 (en) Arc spot welding method for joining dissimilar materials
JP7025489B2 (en) Arc welding method for joining dissimilar materials, joining auxiliary members, and welded joints made of dissimilar materials
WO2020084971A1 (en) Arc welding method for joining dissimilar materials, joining assist member, dissimilar material welded joint, and plate material equipped with joining assist member
JP7131927B2 (en) Dissimilar Material Joining Method, Joining Auxiliary Member, and Dissimilar Material Joining Joint

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16915235

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16915235

Country of ref document: EP

Kind code of ref document: A1