JP3400207B2 - Overlap joining method of two kinds of metal members having different melting points - Google Patents
Overlap joining method of two kinds of metal members having different melting pointsInfo
- Publication number
- JP3400207B2 JP3400207B2 JP26346995A JP26346995A JP3400207B2 JP 3400207 B2 JP3400207 B2 JP 3400207B2 JP 26346995 A JP26346995 A JP 26346995A JP 26346995 A JP26346995 A JP 26346995A JP 3400207 B2 JP3400207 B2 JP 3400207B2
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- metal member
- metal
- joining
- electrode
- welding
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、融点を異にする二
種の金属部材の重ね合せ接合方法、特に、第１の金属部
材と、その第１の金属部材よりも高い融点を持つ第２の
金属部材とを重ね合せて、その重ね合せ部分を接合する
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laminating and joining two kinds of metal members having different melting points, and particularly to a first metal member and a second metal member having a melting point higher than that of the first metal member. Of the metal member of (1) above and joining the overlapped portions.
【０００２】[0002]
【従来の技術】融点を異にする二種の金属部材、例えば
Ａｌ系合金板（Ａｌの融点６６０℃）と鋼板（Ｆｅの融
点１５４０℃）との重ね合せ部分を接合すべく、スポッ
ト溶接法を適用すると、それらの融点差に起因してＡｌ
系合金板は溶融するが、鋼板は殆ど溶融しない、という
現象が発生する。2. Description of the Related Art A spot welding method for joining two kinds of metal members having different melting points, for example, an overlapping portion of an Al-based alloy plate (Al melting point 660 ° C.) and a steel plate (Fe melting point 1540 ° C.). Is applied due to their melting point difference, Al
The phenomenon occurs that the system alloy plate melts, but the steel plate hardly melts.
【０００３】このような異材種溶接部についてその強度
を調べると、その異材種溶接部は引張り剪断試験におい
てはＡｌ系合金板相互の溶接部、つまり同材種溶接部と
略同等の強度を示すが、Ｕ字形引張り試験においては同
材種溶接部の例えば６分の１程度の強度しか示さない、
ということが判る。When the strength of such a dissimilar material welded portion is investigated, the dissimilar material type welded portion exhibits substantially the same strength as the welded portions of Al-based alloy plates, that is, the same material type welded portion in a tensile shear test. However, in the U-shaped tensile test, it shows only a strength of, for example, about one sixth of a welded portion of the same material type,
I understand that.
【０００４】そこで、従来は、Ａｌ系合金板と鋼板との
重ね合せ部分間に、Ａｌ系合金層と鋼層とよりなるクラ
ッド材を、そのＡｌ系合金層をＡｌ系合金板側に、また
鋼層を鋼板側にそれぞれ位置させて介在させる、といっ
た方法が採用されている（特開平５−１１１７７８号公
報参照）。Therefore, conventionally, a clad material composed of an Al-based alloy layer and a steel layer is provided between the overlapping portions of the Al-based alloy sheet and the steel sheet, and the Al-based alloy layer is placed on the Al-based alloy sheet side. A method of arranging and interposing the steel layers on the steel sheet side is adopted (see Japanese Patent Laid-Open No. 5-111778).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら従来法
は、重ね合せ部分が弧状をなす等複雑な形状を有する場
合に対応性が悪く、また重ね合せ部分において、クラッ
ド材の厚さに応じてＡｌ系合金板および鋼板間にギャッ
プが生じるため、デザイン上、その施行場所に対する制
約が大きく、さらにクラッド材を前記重ね合せ部分間に
点在させた場合には前記ギャップにより溶接部の気密性
が損われ、一方、重ね合せ部分全長に亘って配設した場
合には重量増を招く、といった問題がある。またクラッ
ド材は比較的高価であるから、接合体の生産コストの増
加は否めない。However, the conventional method has a poor adaptability when the overlapping portion has a complicated shape such as an arc shape, and in the overlapping portion, Al-based materials are used depending on the thickness of the clad material. Since there is a gap between the alloy plate and the steel plate, there is a large restriction on the place where the alloy plate and the steel plate are to be applied, and when the clad material is scattered between the overlapping portions, the airtightness of the welded part is impaired by the gap. On the other hand, there is a problem in that the weight is increased when it is arranged over the entire length of the overlapping portion. Further, since the clad material is relatively expensive, it cannot be denied that the production cost of the bonded body will increase.
【０００６】[0006]
【課題を解決するための手段】本発明は、重ね合せ部分
が複雑な形状を有する場合にも対応性が良く、また重ね
合せ部分における前記ギャップの発生を回避し、その上
接合体の生産コストを低減し得る前記接合方法を提供す
ることを目的とする。The present invention has good adaptability even when the overlapping portion has a complicated shape, and avoids the occurrence of the gap in the overlapping portion, and further, the production cost of the joined body. It is an object of the present invention to provide the above-mentioned joining method capable of reducing the above.
【０００７】前記目的を達成するため本発明によれば、
第１の金属部材と、その第１の金属部材よりも高い融点
を持つ第２の金属部材とを重ね合せて、その重ね合せ部
分をスポット溶接により接合するに当り、前記第１の金
属部材よりも高い融点を持ち、且つ塑性変形および前記
第２の金属部材との抵抗溶接がそれぞれ可能な第３の金
属部材を、前記重ね合せ部分において前記第１の金属部
材に重ね合せ、次いで、一方の電極に在って、テーパ角
度θがθ≧９０度である円錐台形突出部の小端面を前記
第３の金属部材に接触させて、その電極および他方の電
極により前記第１，第２および第３の金属部材を加圧す
ると共に両電極間に溶接電流を流して、前記第１の金属
部材の通電部分およびその近傍の溶融、前記円錐台形突
出部による前記第３の金属部材の、前記第２の金属部材
側への部分的膨出変形、その部分的膨出変形による溶融
部分の排除、膨出変形部分の前記第２の金属部材への当
接および前記膨出変形部分と前記第２の金属部材との抵
抗溶接を順次現出させる重ね合せ接合方法が提供され
る。According to the present invention to achieve the above object,
When the first metal member and the second metal member having a melting point higher than that of the first metal member are superposed and the superposed portion is joined by spot welding , A third metal member having a high melting point and capable of plastic deformation and resistance welding with the second metal member, respectively, is superposed on the first metal member at the superposing portion, and then one of the At the electrode, taper angle
The small end face of the truncated cone-shaped protrusion whose degree θ is θ ≧ 90 degrees is described above.
The third metal member is brought into contact with its electrode and the other electrode.
The first, second and third metal members are pressed by the poles and a welding current is caused to flow between both electrodes to melt the energized portion of the first metal member and its vicinity, the cone. Trapezoid
Said by out section a third metal member, partial bulging deformation to said second metal member side, elimination of melted portion due to the partial bulging deformation, to the second metal member of the bulging deformation portion Is provided, and a lap joining method is provided in which resistance welding between the bulging deformed portion and the second metal member is sequentially revealed.
【０００８】前記方法によれば、第１の金属部材は、第
３の金属部材およびその膨出変形部分によるリベット継
手状の締結構造によって、第２の金属部材と強固に接合
される。According to the above method, the first metal member is firmly joined to the second metal member by the rivet joint-shaped fastening structure formed by the third metal member and its bulging deformation portion.
【０００９】また第３の金属部材は打抜きによるブラン
クでよいから、その形状自由度が大きく、その結果、重
ね合せ部分が複雑な形状を有する場合にも、それに容易
に対応することが可能である。Further, since the third metal member may be a blank by punching, it has a large degree of freedom in its shape, and as a result, even if the overlapping portion has a complicated shape, it can be easily dealt with. .
【００１０】さらに第３の金属部材は、重ね合せ部分に
おいて第１の金属部材に重ね合されるので、第１および
第２の金属部材間にギャップを生じることがない。Further, since the third metal member is superposed on the first metal member at the superposing portion, no gap is formed between the first and second metal members.
【００１１】その上、第３の金属部材としては、単板構
造のものを用いることが可能であるから、その第３の金
属部材を用いることによる接合体の生産コスト増および
重量増は抑制される。In addition, since a single plate structure can be used as the third metal member, increase in production cost and weight of the joined body due to use of the third metal member is suppressed. It
【００１２】[0012]
【発明の実施の形態】図１，２において、接合体１は第
１の金属部材であるＡｌ系合金板（またはＡｌ板）２
と、そのＡｌ系合金板２よりも高い融点を持つ第２の金
属部材である鋼板（Ｆｅ系合金板、またはＦｅ板）３と
を有し、それら２，３の重ね合せ部分４が接合されてい
る。1 and 2, a bonded body 1 is an Al-based alloy plate (or Al plate) 2 which is a first metal member.
And a steel plate (Fe-based alloy plate or Fe plate) 3 which is a second metal member having a melting point higher than that of the Al-based alloy plate 2, and the overlapping portions 4 of these 2 and 3 are joined together. ing.
【００１３】この重ね合せ接合には、Ａｌ系合金板２よ
りも高い融点を持つ第３の金属部材、例えば鋼板より打
抜かれた円形ブランク５が用いられると共に抵抗溶接法
としてのスポット溶接法が適用される。A third metal member having a melting point higher than that of the Al-based alloy plate 2, for example, a circular blank 5 punched from a steel plate is used for this lap joining, and a spot welding method as a resistance welding method is applied. To be done.
【００１４】これにより得られる接合構造は、Ｏ．Ｆ．
Ｃ．製上、下部電極６，７による加圧通電下で生じた円
形ブランク５中央部分の塑性変形による膨出変形部分８
が、Ａｌ系合金板２の溶融部分を排除して鋼板３にナゲ
ット９の形成下でスポット溶接され、また円形ブランク
５の外周部分１０がＡｌ系合金板２に圧着されている、
といった構造となる。The joint structure thus obtained is O.V. F.
C. Bulging and deformed portion 8 due to plastic deformation of the central portion of the circular blank 5 generated by pressurization and energization by the lower electrodes 6 and 7
However, the molten portion of the Al-based alloy plate 2 is excluded and spot welding is performed on the steel plate 3 under the formation of the nugget 9, and the outer peripheral portion 10 of the circular blank 5 is pressure-bonded to the Al-based alloy plate 2.
It becomes such a structure.
【００１５】以下、前記重ね合せ接合方法について詳細
に説明する。Hereinafter, the lap joining method will be described in detail.
【００１６】図３，４において、スポット溶接機１１の
上部電極６は、断面円形のロッド状電極本体１２と、そ
の電極本体１２の下端面に突設された抜き勾配１３を有
する円錐台形突出部１４とよりなる。したがって、突出
部１４は電極軸線方向と交差する平面内において円形断
面を有する。また突出部１４の小端面１５周縁部には丸
み１６を付されている。下部電極７としては、ＪＩＳ
Ｒ形電極が用いられているが、ＪＩＳ ＣＦ形電極また
はＣＲ形電極でもよい。図中、１７はトランス、１８は
インバータ式制御器である。
（ａ） 図５に示すように、鋼板３の一端部上にＡｌ系
合金板２の一端部を重ね合せ、次いで重ね合せ部分４に
おいてＡｌ系合金板２の上に、円形ブランク５を重ね合
せる。
（ｂ） 図６に示すように、円形ブランク５、Ａｌ系合
金板２および鋼板３を、その円形ブランク５を上部電極
６側に位置させて、両電極６，７間に配設し、次いでそ
れら５，２，３を両電極６，７によって加圧すると共に
両電極６，７間に溶接電流を流す。
（ｃ） 図７に示すように、前記加圧下での通電によっ
て円形ブランク５、Ａｌ系合金板２および鋼板３が接触
抵抗により発熱し、次いで、融点の低いＡｌ系合金板２
の通電部分１９およびその近傍が溶融し、また円形ブラ
ンク５および鋼板３の通電部分およびその近傍が軟化す
る。
（ｄ） 図８に示すように、上部電極６の円錐台形突出
部１４により加圧されている円形ブランク５の中央部分
がＡｌ系合金板２側へ円錐台形をなすように膨出変形
し、これにより溶融部分がＡｌ系合金板２および鋼板３
間の間隙に排除されるので、膨出変形部分８の小端２０
が鋼板３に当接する。
（ｅ） 図９に示すように、膨出変形部分８の小端２０
と、それと当接する鋼板３とが、両電極６，７により加
圧下で通電されるので、その小端２０と鋼板３とがナゲ
ット９を形成してスポット溶接され、これにより同材種
溶接部が形成される。3 and 4, the upper electrode 6 of the spot welding machine 11 has a truncated cone-shaped protrusion having a rod-shaped electrode body 12 having a circular cross section and a draft 13 protruding from the lower end surface of the electrode body 12. It consists of fourteen. Therefore, the protrusion 14 has a circular cross section in a plane that intersects the electrode axis direction. A roundness 16 is attached to the peripheral portion of the small end surface 15 of the protruding portion 14. As the lower electrode 7, JIS
Although an R type electrode is used, a JIS CF type electrode or a CR type electrode may be used. In the figure, 17 is a transformer and 18 is an inverter type controller. (A) As shown in FIG. 5, one end of the Al-based alloy plate 2 is superposed on one end of the steel plate 3, and then the circular blank 5 is superposed on the Al-based alloy plate 2 in the superposing portion 4. . (B) As shown in FIG. 6, a circular blank 5, an Al-based alloy plate 2 and a steel plate 3 are placed between the electrodes 6 and 7 with the circular blank 5 positioned on the upper electrode 6 side. These electrodes 5, 2 and 3 are pressed by both electrodes 6 and 7, and a welding current is passed between both electrodes 6 and 7. (C) As shown in FIG. 7, the circular blank 5, the Al-based alloy plate 2 and the steel plate 3 generate heat due to contact resistance due to the energization under the pressure, and then the Al-based alloy plate 2 having a low melting point.
The current-carrying portion 19 and its vicinity are melted, and the current-carrying portion of the circular blank 5 and the steel plate 3 and its vicinity are softened. (D) As shown in FIG. 8, the central portion of the circular blank 5 pressed by the frustoconical projection 14 of the upper electrode 6 bulges and deforms toward the Al-based alloy plate 2 side to form a frustoconical shape, As a result, the molten portion is the Al-based alloy plate 2 and the steel plate 3
The small end 20 of the swollen deformed portion 8 is eliminated because it is excluded in the gap between them.
Contacts the steel plate 3. (E) As shown in FIG. 9, the small end 20 of the bulging deformed portion 8
And the steel plate 3 in contact therewith are energized under pressure by both electrodes 6 and 7, so that the small end 20 and the steel plate 3 form a nugget 9 and are spot welded. Is formed.
【００１７】前記スポット溶接後において、上部電極６
の円錐台形突出部１４は、それが抜き勾配１３を有する
ことから、膨出変形部分８より容易に抜ける。After the spot welding, the upper electrode 6
The frusto-conical projection 14 of ∘ comes out more easily than the bulging deformed portion 8 because it has a draft 13.
【００１８】前記方法によれば、Ａｌ系合金板２は、円
形ブランク５の外周部分１０およびその膨出変形部分８
によるリベット継手状の締結構造によって、鋼板３と強
固に接合される。According to the above method, the Al-based alloy plate 2 has the outer peripheral portion 10 of the circular blank 5 and its bulging-deformed portion 8.
With the rivet joint-shaped fastening structure, the steel plate 3 is firmly joined.
【００１９】また打抜きによる円形ブランク５は、その
形状自由度が大きく、その結果、重ね合せ部分４が複雑
な形状を有する場合にも、それに容易に対応することが
可能である。Further, the punched circular blank 5 has a large degree of freedom in its shape, and as a result, even when the overlapping portion 4 has a complicated shape, it can be easily dealt with.
【００２０】さらに円形ブランク５は、重ね合せ部分４
においてＡｌ系合金板２上に重ね合されるので、Ａｌ系
合金板２および鋼板３間にギャップを生じることがな
い。Further, the circular blank 5 has an overlapping portion 4
Since it is superposed on the Al-based alloy plate 2, the gap between the Al-based alloy plate 2 and the steel plate 3 does not occur.
【００２１】その上、円形ブランク５は、単板構造であ
るから、その円形ブランク５を用いることによる接合体
１の生産コスト増および重量増は抑制される。In addition, since the circular blank 5 has a single plate structure, the production cost and the weight of the joined body 1 can be prevented from increasing by using the circular blank 5.
【００２２】図１０に示すように、円形ブランク５のＡ
ｌ系合金板２との対向面２１において、その外周部全体
に接着剤２２を塗布し、これにより、円形ブランク５を
重ね合せ部分４の所定位置に確実に保持して接合作業性
を向上させることができる。As shown in FIG. 10, the circular blank 5 has A
An adhesive 22 is applied to the entire outer peripheral portion of the surface 21 facing the l-based alloy plate 2, whereby the circular blank 5 is reliably held at a predetermined position of the overlapping portion 4 and the workability of joining is improved. be able to.
【００２３】また図１１に示すように接着剤２２をシー
リング材２３と代替すると共に重ね合せ部分４において
Ａｌ系合金板２と鋼板３との間にシーリング材２３を環
状に介在させ、これによりＡｌ系合金板２に接合作業で
生じた孔部２４（図９参照）を含む接合部の耐食性を向
上させることができる。Further, as shown in FIG. 11, the adhesive 22 is replaced with the sealing material 23, and the sealing material 23 is annularly interposed between the Al-based alloy plate 2 and the steel plate 3 in the overlapping portion 4, whereby Al is formed. It is possible to improve the corrosion resistance of the joint portion including the hole portion 24 (see FIG. 9) formed in the base alloy plate 2 during the joint work.
【００２４】図１２〜１４は、鋼板３の塑性変形能を利
用して、第３の金属部材を形成するようにした接合体１
の３例を示す。12 to 14 show a joined body 1 in which the third metal member is formed by utilizing the plastic deformability of the steel plate 3.
3 examples will be shown.
【００２５】図１２（ａ），（ｂ）に示す例は、鋼板３
の一端部２５を折返して、その折返し部分５1 を第３の
金属部材とし、次いで鋼板３と折返し部分５1 との間に
Ａｌ系合金板２の一端部を、そのＡｌ系合金板２と鋼板
３の両平面が相互に平行し、且つ両板２，３の伸長方向
が９０度食違うように嵌込み、その後前記と同様の接合
方法を実施したものである。The example shown in FIGS. 12A and 12B is a steel plate 3
By folding back the end portion 25, the folded portions 5 1 and third metal members, then the end portion of the Al-based alloy plate 2 between the portions 5 1 folded and the steel plate 3, and its Al-based alloy plate 2 Both planes of the steel plate 3 are parallel to each other, and the two plates 2 and 3 are fitted so that their extending directions are offset by 90 degrees, and then the same joining method as described above is carried out.
【００２６】図１３に示す例は、鋼板３の端部一側縁に
板状突出部２６を、その平面と鋼板３の平面とが同一平
面上に位置するように設け、その板状突出部２６を折返
して、その折返し部分５1 を第３の金属部材とし、次い
で鋼板３と折返し部分５1 との間にＡｌ系合金板２の一
端部を、そのＡｌ系合金板２と鋼板３の両平面が相互に
平行し、且つ両板２，３の伸長方向が同一となるように
嵌込み、その後前記と同様の接合方法を実施したもので
ある。In the example shown in FIG. 13, a plate-like projecting portion 26 is provided on one edge of the end portion of the steel plate 3 so that its plane and the plane of the steel sheet 3 are located on the same plane. folded to 26, the folded portions 5 1 and third metal members, then the end portion of the Al-based alloy plate 2 between the portions 5 1 folded and the steel plate 3, the Al-based alloy plate 2 and the steel sheet 3 Both planes are parallel to each other, and the plates 2 and 3 are fitted so that the extending directions thereof are the same, and then the same joining method as described above is carried out.
【００２７】図１４に示す例は、鋼板３の一端部を直角
に折曲げることにより形成された板状折曲げ部２７の略
半分を折返して、その折返し部分５1 を第３の金属部材
とし、次いで鋼板３と折返し部分５1 との間にＡｌ系合
金板２の一端部を、そのＡｌ系合金板２と鋼板３の両平
面が直角関係にあり、且つ両板２，３の伸長方向が９０
度食違うように嵌込み、その後前記と同様の接合方法を
実施したものである。In the example shown in FIG. 14, approximately half of the plate-shaped bent portion 27 formed by bending one end of the steel sheet 3 at a right angle is folded back, and the folded-back portion 5 1 is used as a third metal member. Then, one end of the Al-based alloy plate 2 is placed between the steel plate 3 and the folded-back portion 5 1, and the two planes of the Al-based alloy plate 2 and the steel plate 3 are in a right-angled relationship, and the extending directions of the both plates 2, 3 Is 90
The pieces were fitted so that they staggered, and then the same joining method as described above was carried out.
【００２８】以下、具体例について説明する。
Ａ．Ｕ字形引張強さについて
図１５に示すように、ＪＩＳ Ｚ ３１３７に則って、
Ａｌ系合金板２より複数のＵ字形引張り試験片用第１半
体２８を製作し、また鋼板３より複数のＵ字形引張り試
験片用第２半体２９を製作した。さらに、前記鋼板３に
打抜き加工を施して複数の円形ブランク５を得た。Specific examples will be described below. A. Regarding the U-shaped tensile strength, as shown in FIG. 15, according to JIS Z 3137,
A plurality of U-shaped tensile test piece first halves 28 were manufactured from the Al-based alloy plate 2, and a plurality of U-shaped tensile test piece second halves 29 were manufactured from the steel plate 3. Further, the steel plate 3 was punched to obtain a plurality of circular blanks 5.
【００２９】Ａｌ系合金板２の材種はＪＩＳ ５１８２
であって、その厚さｔ1 はｔ1 ＝１．０mmに設定され、
一方、鋼板３の材種はＪＩＳ ＳＰＣＣであって、厚さ
ｔ2はｔ2 ＝０．７mmに設定された。この場合、Ａｌ系
合金板２の厚さｔ1 と鋼板３の厚さｔ2 との間には、ｔ
1 ＝（２1/2 ）×ｔ2 が成立している。これは両板２，
３の剛性を略同一にするためである。円形ブランク５の
直径Ｄ1 はＤ1 ＝１５mmに設定された。The material type of the Al-based alloy plate 2 is JIS 5182.
And its thickness t 1 is set to t 1 = 1.0 mm,
On the other hand, the grade of the steel plate 3 was JIS SPCC, and the thickness t 2 was set to t 2 = 0.7 mm. In this case, between the thickness t 2 of the Al-based alloy sheet thickness t 1 of the 2 and the steel plate 3, t
1 = (2 1/2 ) × t 2 holds. This is both plates 2,
This is for making the rigidity of 3 substantially the same. The diameter D 1 of the circular blank 5 was set to D 1 = 15 mm.
【００３０】図３に示すように、上部電極６において、
その電極本体１２の直径Ｄ2 はＤ2＝１６mmに、円錐台
形突出部１４のテーパ角度θはθ＝９０度に、その長さ
ＬはＬ＝４mmに、小端面１５周縁部における丸み１６の
半径Ｒ1 はＲ1 ＝１mmにそれぞれ設定された。小端径Ｄ
3 は４〜７mmの範囲で変化させた。As shown in FIG. 3, in the upper electrode 6,
The diameter D 2 of the electrode body 12 is D 2 = 16 mm, the taper angle θ of the frustoconical protrusion 14 is θ = 90 °, the length L thereof is L = 4 mm, and the roundness 16 of the peripheral portion of the small end face 15 is The radius R 1 was set to R 1 = 1 mm. Small end diameter D
3 was changed in the range of 4 to 7 mm.
【００３１】下部電極７において、その直径Ｄ4 はＤ4
＝１６mmに、球状先端面３０の半径Ｒ2 はＲ2 ＝８０mm
にそれぞれ設定された。In the lower electrode 7, the diameter D 4 is D 4
= 16 mm, the radius R 2 of the spherical tip surface 30 is R 2 = 80 mm
Were set respectively.
【００３２】第１，第２半体２８，２９および円形ブラ
ンク５を用い、また溶接条件および上部電極６をそれぞ
れ変更して前記同様の接合方法（図５〜９参照）を実施
することにより、図１６に示すような、実施例に係る複
数のＵ字形引張り試験片３１を得た。By using the first and second halves 28 and 29 and the circular blank 5 and changing the welding conditions and the upper electrode 6 to carry out the same joining method (see FIGS. 5 to 9) as described above, A plurality of U-shaped tensile test pieces 31 according to the example as shown in FIG. 16 were obtained.
【００３３】次に、第１，第２半体２８，２９を用い、
また２つの下部電極７を、それぞれ上、下部電極として
スポット溶接を行い、図１７に示す比較例１に係るＵ字
形引張り試験片３２を得た。Next, using the first and second halves 28 and 29,
Further, two lower electrodes 7 were spot-welded as upper and lower electrodes, respectively, to obtain a U-shaped tensile test piece 32 according to Comparative Example 1 shown in FIG.
【００３４】さらに、２つの第１半体２８を用い、また
２つの下部電極７を、それぞれ上、下部電極としてスポ
ット溶接を行い、図１８に示す比較例２に係るＵ字形引
張り試験片３３を得た。Further, two first halves 28 were used, and two lower electrodes 7 were spot-welded as upper and lower electrodes, respectively, and a U-shaped tensile test piece 33 according to Comparative Example 2 shown in FIG. 18 was obtained. Obtained.
【００３５】その後、各Ｕ字形引張り試験片３１〜３３
について引張り試験を行った。Then, each U-shaped tensile test piece 31-33
Was subjected to a tensile test.
【００３６】表１は、各Ｕ字形引張り試験片３１〜３３
に関する上部電極６の小端径Ｄ3 、溶接条件、散りの有
無、Ｕ字形引張強さを示す。Table 1 shows the U-shaped tensile test pieces 31 to 33.
The small end diameter D 3 of the upper electrode 6, the welding conditions, the presence / absence of scattering, and the U-shaped tensile strength are shown.
【００３７】[0037]
【表１】 [Table 1]
【００３８】表１から明らかなように、実施例１〜４に
よれば、Ｕ字形引張強さが大いに向上し、それらは比較
例２のＡｌ系合金板相互の接合強度を上回っている。比
較例２のＵ字形引張強さは比較例１のそれの略６分の１
であることが判る。As is clear from Table 1, according to Examples 1 to 4, the U-shaped tensile strength was greatly improved, and they exceeded the joint strength between the Al-based alloy sheets of Comparative Example 2. The U-shaped tensile strength of Comparative Example 2 is about one sixth of that of Comparative Example 1.
It turns out that
【００３９】図１９において、（ａ）は実施例１の接合
部断面における金属組織を示す顕微鏡写真であり、
（ｂ）は（ａ）の縮小写図である。図１９より、膨出変
形部分８の小端２０と第２半体２９との間にナゲット９
が形成されて、第１，第２半体２８，２９が強固に接合
されていることが判る。In FIG. 19, (a) is a micrograph showing the metal structure in the cross section of the joint portion of Example 1,
(B) is a reduced map of (a). From FIG. 19, a nugget 9 is provided between the small end 20 of the bulging deformed portion 8 and the second half body 29.
It can be seen that the first and second halves 28 and 29 are firmly joined to each other.
【００４０】なお、実施例３，４のように上部電極６の
小端径Ｄ3 がＤ3 ≧６mmになると、Ｕ字形引張強さは高
くなるものの散りも発生する。When the small end diameter D 3 of the upper electrode 6 is D 3 ≧ 6 mm as in Examples 3 and 4, the U-shaped tensile strength increases, but scattering also occurs.
【００４１】次に、第１半体２８の厚さｔ1 をｔ1 ＝
１．２mmに、また第２半体２９の厚さｔ2 をｔ2 ＝０．
８mmにそれぞれ変更し、さらに溶接条件を一部変えて前
記同様の接合方法を実施し、前記同様のＵ字形引張り試
験片３１〜３３を得た。Next, the thickness t 1 of the first half 28 is t 1 =
1.2 mm and the thickness t 2 of the second half 29 is t 2 = 0.
The same joining method as described above was performed by changing the welding conditions to 8 mm and changing the welding conditions partially to obtain the same U-shaped tensile test pieces 31 to 33.
【００４２】表２は、各Ｕ字形引張り試験片３１〜３３
に関する上部電極６の小端径Ｄ3 、溶接条件、散りの有
無、Ｕ字形引張強さを示す。Table 2 shows the U-shaped tensile test pieces 31 to 33.
The small end diameter D 3 of the upper electrode 6, the welding conditions, the presence / absence of scattering, and the U-shaped tensile strength are shown.
【００４３】[0043]
【表２】 [Table 2]
【００４４】表２の場合も表１の場合と同様の傾向がみ
られることが明らかである。
Ｂ．上部電極の円錐台形突出部におけるテーパ角度θに
ついて
上部電極６として、その円錐台形突出部１４のテーパ角
度θを変更したものを複数用意した。ただし、各上部電
極６において、その電極本体１２の直径Ｄ2 はＤ2 ＝１
６mmに、円錐台形突出部１４の小端径Ｄ3 はＤ3 ＝４mm
に、また長さＬはＬ＝３mmに、さらに小端面１５周縁部
の丸み１６の半径Ｒ1 はＲ1 ＝１mmにそれぞれ設定され
た。It is clear that the same tendency as in the case of Table 1 is observed in the case of Table 2. B. Regarding the taper angle θ of the truncated cone-shaped protrusion of the upper electrode, as the upper electrode 6, a plurality of electrodes having different tapered angles θ of the truncated cone-shaped protrusion 14 were prepared. However, in each upper electrode 6, the diameter D 2 of the electrode body 12 is D 2 = 1.
6 mm, the small end diameter D 3 of the truncated conical protrusion 14 is D 3 = 4 mm
Further, the length L was set to L = 3 mm, and the radius R 1 of the roundness 16 at the peripheral portion of the small end face 15 was set to R 1 = 1 mm.
【００４５】下部電極７において、その直径Ｄ4 はＤ4
＝１６mmに、球状先端面３０の半径Ｒ2 はＲ2 ＝８０mm
にそれぞれ設定された。In the lower electrode 7, the diameter D 4 is D 4
= 16 mm, the radius R 2 of the spherical tip surface 30 is R 2 = 80 mm
Were set respectively.
【００４６】また複数のＡｌ系合金板２、複数の鋼板３
およびそれら鋼板３と同種の鋼板より打抜かれた複数の
円形ブランク５を用意した。各Ａｌ系合金板２の材種は
ＪＩＳ ５１８２であって、その厚さｔ1 はｔ1 ＝１．
０mmに設定され、また各鋼板３の材種はＪＩＳ ＳＰＣ
Ｃであって、その厚さｔ2 はｔ2 ＝０．７mmに設定され
た。円形ブランク５の直径Ｄ1 はＤ1 ＝１５mmに設定さ
れた。A plurality of Al-based alloy plates 2 and a plurality of steel plates 3
Also, a plurality of circular blanks 5 punched from steel plates of the same type as those steel plates 3 were prepared. The material type of each Al-based alloy plate 2 is JIS 5182, and its thickness t 1 is t 1 = 1.
It is set to 0 mm and the grade of each steel plate 3 is JIS SPC.
C and its thickness t 2 was set to t 2 = 0.7 mm. The diameter D 1 of the circular blank 5 was set to D 1 = 15 mm.
【００４７】次いで、前記同様の接合方法（図５〜９参
照）を実施して、前記テーパ角度θと離型不良率Ｐとの
関係を求めたところ、表３の結果を得た。Next, the same joining method as described above (see FIGS. 5 to 9) was carried out to determine the relationship between the taper angle θ and the mold release defect rate P, and the results shown in Table 3 were obtained.
【００４８】溶接条件は、溶接電流１０ｋＡ、加圧力２
００kgｆおよび通電時間２０サイクルである。離型不良
率Ｐは、所定のテーパ角度θを持つ円錐台形突出部１４
を備えた上部電極６を用いて行われた接合作業回数を１
０回とし、また円錐台形突出部１４が膨出変形部分８の
内面に付着した回数をｎ回としたとき、Ｐ＝（ｎ／１
０）×１００（％）として求められた。なお、前記付着
とは、ハンマで接合体１を叩くことによって円錐台形突
出部１４が膨出変形部分８内面から外れる程度の機械的
嵌合状態を意味する。The welding conditions are welding current 10 kA and pressure 2
It is 00 kgf and the energization time is 20 cycles. The mold release defect rate P is determined by the truncated cone-shaped protrusion 14 having a predetermined taper angle θ.
1 times the number of joining operations performed using the upper electrode 6 equipped with
Assuming that the number of times the frustoconical protrusion 14 has adhered to the inner surface of the bulging deformation portion 8 is n times, P = (n / 1
It was calculated as 0) × 100 (%). The attachment means a mechanical fitting state in which the truncated cone-shaped protruding portion 14 is disengaged from the inner surface of the bulging deformation portion 8 by hitting the joined body 1 with a hammer.
【００４９】[0049]
【表３】 [Table 3]
【００５０】表３から明らかなように、テーパ角度θを
θ≧９０度に設定することによって、離型不良率Ｐを大
幅に低減することができる。
Ｃ．図２０，２１は上部電極６の変形例を示す。この上
部電極６は断面円形のロッド状電極本体１２と、その電
極本体１２の下端面に突設された円柱状突出部１４1 と
よりなる。したがって、その突出部１４1 は、真直な突
出部であり、且つ電極軸線方向と交差する平面内におい
て円形断面を有する。突出部１４1 は円形ブランク５に
膨出変形部分８を形成するもので、先端面１５1 の周縁
部には丸み１６1 を付されている。As is clear from Table 3, the release defect rate P can be significantly reduced by setting the taper angle θ to θ ≧ 90 degrees. C. 20 and 21 show modifications of the upper electrode 6. The upper electrode 6 is composed of a rod-shaped electrode body 12 having a circular cross section and a cylindrical protrusion 14 1 projecting from the lower end surface of the electrode body 12. Therefore, the protrusion 14 1 is a straight protrusion and has a circular cross section in a plane intersecting the electrode axis direction. Protrusions 14 1 forms a bulging deformation portion 8 in a circular blank 5, are assigned the rounded 16 1 on the peripheral edge of the distal end surface 15 1.
【００５１】この丸み１６1 の半径Ｒ3 と、前記離型不
良率Ｐとの関係を求めるため、半径Ｒ3 を異にする複数
の上部電極６を用意した。ただし、各上部電極６におい
て、その電極本体１２の直径Ｄ2 はＤ2 ＝１６mmに、ま
た突出部１４1 の長さＬはＬ＝５mmに、さらに先端面１
５1 の直径Ｄ3 はＤ3 ＝４mmにそれぞれ設定された。In order to find the relationship between the radius R 3 of the roundness 16 1 and the release defect rate P, a plurality of upper electrodes 6 having different radii R 3 were prepared. However, in each upper electrode 6, the diameter D 2 of the electrode body 12 is D 2 = 16 mm, the length L of the protrusion 14 1 is L = 5 mm, and the tip surface 1
The diameter D 3 of 5 1 was set to D 3 = 4 mm, respectively.
【００５２】図３に示すように下部電極７において、そ
の直径Ｄ4 はＤ4 ＝１６mmに、球状先端面３０の半径Ｒ
2 はＲ2 ＝８０mmにそれぞれ設定された。As shown in FIG. 3, in the lower electrode 7, the diameter D 4 is D 4 = 16 mm, and the radius R of the spherical tip surface 30 is R.
2 was set to R 2 = 80 mm, respectively.
【００５３】また複数のＡｌ系合金板２、複数の鋼板３
およびそれら鋼板３と同種の鋼板より打抜かれた複数の
円形ブランク５を用意した。各Ａｌ系合金板２の材種は
ＪＩＳ ５１８２であって、その厚さｔ1 はｔ1 ＝１．
０mmに設定され、また各鋼板３の材種はＪＩＳ ＳＰＣ
Ｃであって、その厚さｔ2 はｔ2 ＝０．７mmに設定され
た。円形ブランク５の直径Ｄ1 はＤ1 ＝１５mmに設定さ
れた。A plurality of Al-based alloy plates 2 and a plurality of steel plates 3
Also, a plurality of circular blanks 5 punched from steel plates of the same type as those steel plates 3 were prepared. The material type of each Al-based alloy plate 2 is JIS 5182, and its thickness t 1 is t 1 = 1.
It is set to 0 mm and the grade of each steel plate 3 is JIS SPC.
C and its thickness t 2 was set to t 2 = 0.7 mm. The diameter D 1 of the circular blank 5 was set to D 1 = 15 mm.
【００５４】次いで、前記同様の接合方法（図５〜９参
照）を実施して、前記半径Ｒ3 と離型不良率Ｐとの関係
を求めたところ、表４の結果を得た。Then, the same joining method as described above (see FIGS. 5 to 9) was carried out to determine the relationship between the radius R 3 and the mold release defect rate P, and the results shown in Table 4 were obtained.
【００５５】溶接条件は、溶接電流１０ｋＡ、加圧力２
００kgｆおよび通電時間２０サイクルである。The welding conditions are welding current 10 kA and pressure 2
The cycle time is 00 kgf and the energization time is 20 cycles.
【００５６】[0056]
【表４】 [Table 4]
【００５７】表４から明らかなように、丸み１６1 の半
径Ｒ3 をＲ3 ≧２mmに設定することによって離型不良率
Ｐを大幅に低減することができる。As is clear from Table 4, the release defect rate P can be significantly reduced by setting the radius R 3 of the roundness 16 1 to R 3 ≧ 2 mm.
【００５８】上部電極６における突出部は、電極軸線方
向と交差する平面内において、前記のような円形断面を
有することなく、非円形断面、例えば図２２，２３に示
すように方形断面を有していてもよい。つまり、図２２
に示す突出部１４2 は四角錐台形をなし、また抜き勾配
１３を有する。図２３に示す突出部１４3 は四角柱状を
なし、また先端面１５1 の周縁部には丸み１６1 を付さ
れている。The projecting portion of the upper electrode 6 has a non-circular cross section, for example, a rectangular cross section as shown in FIGS. 22 and 23, in the plane intersecting the electrode axis direction, without having the circular cross section as described above. May be. That is, FIG.
The protrusion 14 2 shown in FIG. 2 has a truncated pyramid shape and has a draft angle 13. Protrusions 14 3 shown in FIG. 23 forms a square pillar shape, also are assigned rounded 16 1 on the peripheral edge of the distal end surface 15 1.
【００５９】このように構成すると、Ａｌ系合金板２お
よび鋼板３間の相対回転を確実に防止することができ
る。With this structure, relative rotation between the Al-based alloy plate 2 and the steel plate 3 can be reliably prevented.
【００６０】[0060]
【００６１】[0061]
【発明の効果】本発明によれば、第１の金属部材と、そ
の第１の金属部材よりも高い融点を持つ第２の金属部材
とを重ね合せて、その重ね合せ部分を接合するに当り、
前記のように第３の金属部材を用い、また特定構造の電
極を用いるスポット溶接手段を適用することによって、
第１の金属部材を第２の金属部材に強固に接合すること
ができる。According to the present invention, the first metal member and the second metal member having a melting point higher than that of the first metal member are superposed on each other and the superposed portions are joined together. ,
Using a third metal member as described above, also conductive having a specific structure
By applying spot welding means using poles ,
The first metal member can be firmly joined to the second metal member.
【００６２】また重ね合せ部分が複雑な形状を有する場
合にも、それに容易に対応することができ、さらに第１
および第２の金属部材間にギャップを生じることがない
ので、そのギャップの発生に伴う不具合を解消すること
ができる。Further, even when the overlapping portion has a complicated shape, it can be easily dealt with.
Since no gap is generated between the second metal member and the second metal member, it is possible to solve the problem caused by the gap.
【００６３】さらにまた第３の金属部材としては単板構
造のものを用いることが可能であるから、その第３の金
属部材を用いることによる接合体の生産コスト増および
重量増を抑制することができる。Furthermore, since it is possible to use a single plate structure as the third metal member, it is possible to suppress an increase in production cost and an increase in weight of the joined body by using the third metal member. it can.
【図１】接合体の平面図である。FIG. 1 is a plan view of a joined body.
【図２】図１の２−２線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】スポット溶接機の説明図である。FIG. 3 is an explanatory diagram of a spot welding machine.
【図４】上部電極の第１例を示す要部斜視図である。FIG. 4 is a perspective view of a main part showing a first example of an upper electrode.
【図５】円形ブランク、Ａｌ系合金板および鋼板の重ね
合せ状態の一例を示す要部斜視図である。FIG. 5 is a main part perspective view showing an example of a state in which a circular blank, an Al-based alloy plate, and a steel plate are superposed.
【図６】円形ブランク、Ａｌ系合金板および鋼板を上、
下部電極間で加圧すると共に両電極間に溶接電流を流す
状態を示す説明図である。FIG. 6 shows a circular blank, an Al-based alloy plate and a steel plate as above,
It is explanatory drawing which shows the state which applies a welding current between both electrodes while pressurizing between lower electrodes.
【図７】Ａｌ系合金板の一部が溶融した状態を示す説明
図である。FIG. 7 is an explanatory view showing a state where a part of an Al-based alloy plate is melted.
【図８】円形ブランクの部分的膨出変形状態を示す説明
図である。FIG. 8 is an explanatory view showing a partially bulged deformation state of a circular blank.
【図９】膨出変形部分と鋼板との接合状態を示す説明図
である。FIG. 9 is an explanatory diagram showing a joined state of a bulging deformed portion and a steel plate.
【図１０】接着剤を塗布された円形ブランクの斜視図で
ある。FIG. 10 is a perspective view of a circular blank coated with an adhesive.
【図１１】円形ブランク、Ａｌ系合金板および鋼板の重
ね合せ状態の他例を示す断面図である。FIG. 11 is a cross-sectional view showing another example of a state in which a circular blank, an Al-based alloy plate and a steel plate are superposed.
【図１２】（ａ）は円形ブランクに対応する第３の金属
部材を鋼板より折曲げ形成した接合体の第１例を示す要
部斜視図であり、（ｂ）は（ａ）のｂ−ｂ線断面図であ
る。FIG. 12 (a) is a perspective view of a main part showing a first example of a joined body in which a third metal member corresponding to a circular blank is formed by bending a steel plate, and FIG. It is a b line sectional view.
【図１３】円形ブランクに対応する第３の金属部材を鋼
板より折曲げ形成した接合体の第２例を示す要部斜視図
である。FIG. 13 is a perspective view of essential parts showing a second example of a joined body in which a third metal member corresponding to a circular blank is formed by bending a steel plate.
【図１４】円形ブランクに対応する第３の金属部材を鋼
板より折曲げ形成した接合体の第３例を示す要部斜視図
である。FIG. 14 is a perspective view of essential parts showing a third example of a joined body in which a third metal member corresponding to a circular blank is formed by bending a steel plate.
【図１５】Ｕ字形引張り試験片の分解斜視図である。FIG. 15 is an exploded perspective view of a U-shaped tensile test piece.
【図１６】Ｕ字形引張り試験片の第１例を示す斜視図で
ある。FIG. 16 is a perspective view showing a first example of a U-shaped tensile test piece.
【図１７】Ｕ字形引張り試験片の第２例を示す斜視図で
ある。FIG. 17 is a perspective view showing a second example of the U-shaped tensile test piece.
【図１８】Ｕ字形引張り試験片の第３例を示す斜視図で
ある。FIG. 18 is a perspective view showing a third example of a U-shaped tensile test piece.
【図１９】（ａ）は接合部断面における金属組織を示す
顕微鏡写真であり、（ｂ）は（ａ）の縮小写図である。FIG. 19 (a) is a micrograph showing a metal structure in a cross section of a joint portion, and FIG. 19 (b) is a reduced image of (a).
【図２０】上部電極の第２例を示す要部正面図である。FIG. 20 is a front view of a main portion showing a second example of the upper electrode.
【図２１】図２０の２１−２１矢視図である。FIG. 21 is a view as seen from an arrow 21-21 in FIG.
【図２２】上部電極の第３例を示す要部斜視図である。FIG. 22 is a perspective view of relevant parts showing a third example of the upper electrode.
【図２３】上部電極の第４例を示す要部斜視図である。FIG. 23 is a perspective view of a main portion showing a fourth example of the upper electrode.
【符号の説明】 ２ 第１の金属部材 ３ 第２の金属部材 ４ 重ね合せ部分 ５，５1 第３の金属部材 ６，７ 電極 ８ 膨出変形部分 １３ 抜き勾配 １４ 円錐台形突出部１４ 1 円柱状突出部 １４ 2 四角錐台形突出部 １４ 3 四角柱状突出部 １５ 小端面 １５1 先端面 １６1 丸み １９ 通電部分 ２１ 対向面 ２２ 接着剤 ２３ シーリング材[Explanation of reference numerals] 2 first metal member 3 second metal member 4 superposed portions 5, 5 1 third metal member 6, 7 electrode 8 bulging deformation portion 13 draft 1 4 frustoconical protrusion 14 1 Cylindrical protrusion 14 2 Square pyramid trapezoidal protrusion 14 3 Square prism protrusion 15 Small end face 15 1 Tip face 16 1 Roundness 19 Current-carrying part 21 Opposing face 22 Adhesive 23 Sealant
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−159289（ＪＰ，Ａ) 特開 昭59−218285（ＪＰ，Ａ) 特開 昭51−50842（ＪＰ，Ａ) 特開 平３−128179（ＪＰ，Ａ) 特開 平５−111776（ＪＰ，Ａ) 特開 平７−214338（ＪＰ，Ａ) 特開 平７−328774（ＪＰ，Ａ) 実開 昭56−67408（ＪＰ，Ｕ) 特公 昭61−57118（ＪＰ，Ｂ１) 特公 昭52−2378（ＪＰ，Ｂ２) 特表 平４−501235（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 11/20 B23K 11/11 B23K 11/30 B23K 103:20 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A 61-159289 (JP, A) JP-A 59-218285 (JP, A) JP-A 51-50842 (JP, A) JP-A-3- 128179 (JP, A) JP-A-51-111776 (JP, A) JP-A-7-214338 (JP, A) JP-A-7-328774 (JP, A) Actual development Sho-56-67408 (JP, U) JP-B-61-57118 (JP, B1) JP-B-52-2378 (JP, B2) JP-B 4-501235 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) B23K 11/20 B23K 11/11 B23K 11/30 B23K 103: 20
Claims (8)
属部材（２）よりも高い融点を持つ第２の金属部材
（３）とを重ね合せて、その重ね合せ部分（４）をスポ
ット溶接により接合するに当り、前記第１の金属部材
（２）よりも高い融点を持ち、且つ塑性変形および前記
第２の金属部材（３）との抵抗溶接がそれぞれ可能な第
３の金属部材（５，５1 ）を、前記重ね合せ部分（４）
において前記第１の金属部材（２）に重ね合せ、次い
で、一方の電極（６）に在って、テーパ角度θがθ≧９
０度である円錐台形突出部（１４）の小端面（１５）を
前記第３の金属部材（５，５ 1 ）に接触させて、その電
極（６）および他方の電極（７）により前記第１，第２
および第３の金属部材（２，３，５，５1 ）を加圧する
と共に両電極（６，７）間に溶接電流を流して、前記第
１の金属部材（２）の通電部分（１９）およびその近傍
の溶融、前記円錐台形突出部（１４）による前記第３の
金属部材（５，５1 ）の、前記第２の金属部材（３）側
への部分的膨出変形、その部分的膨出変形による溶融部
分の排除、膨出変形部分（８）の前記第２の金属部材
（３）への当接および前記膨出変形部分（８）と前記第
２の金属部材（３）との抵抗溶接を順次現出させること
を特徴とする、融点を異にする二種の金属部材の重ね合
せ接合方法。1. A first metal member (2) and a second metal member (3) having a melting point higher than that of the first metal member (2) are superposed on each other, and the superposed portion (4). ) the spot
A third metal having a melting point higher than that of the first metal member (2), and capable of plastic deformation and resistance welding with the second metal member (3), respectively, when joining by means of welding. The member (5, 5 1 ) is attached to the overlapping portion (4).
At the first metal member (2), and then at one electrode (6), the taper angle θ is θ ≧ 9.
The small end face (15) of the frustoconical protrusion (14) at 0 degrees
The third metal member (5, 5 1 ) is brought into contact with the
By the pole (6) and the other electrode (7) ,
And the third metal member (2, 3, 5, 5 1 ) is pressed and a welding current is passed between the electrodes (6, 7), so that the current-carrying portion (19) of the first metal member (2). And melting in the vicinity thereof, partial bulging deformation of the third metal member (5, 5 1 ) by the frustoconical protrusion (14) toward the second metal member (3) , Elimination of a melted portion due to bulging deformation, contact of the bulging deformation portion (8) with the second metal member (3), and bulging deformation portion (8) and the second metal member (3) The method of superposing and joining two kinds of metal members having different melting points, which is characterized in that the resistance welding of the above is sequentially revealed.
属部材（２）よりも高い融点を持つ第２の金属部材
（３）とを重ね合せて、その重ね合せ部分（４）をスポ
ット溶接により接合するに当り、前記第１の金属部材
（２）よりも高い融点を持ち、且つ塑性変形および前記
第２の金属部材（３）との抵抗溶接がそれぞれ可能な第
３の金属部材（５，５ 1 ）を、前記重ね合せ部分（４）
において前記第１の金属部材（２）に重ね合せ、次い
で、一方の電極（６）に在って、先端面（１５ 1 ）の周
縁部に半径Ｒ 3 がＲ 3 ≧２mmである丸み（１６ 1 ）を付
された円柱状突出部（１４ 1 ）の前記先端面（１５ 1 ）
を前記第３の金属部材（５，５ 1 ）に接触させて、その
電極（６）および他方の電極（７）により前記第１，第
２および第３の金属部材（２，３，５，５ 1 ）を加圧す
ると共に両電極（６，７）間に溶接電流を流して、前記
第１の金属部材（２）の通電部分（１９）およびその近
傍の溶融、前記円柱状突出部（１４ 1 ）による、前記第
３の金属部材（５， ５ 1 ）の、前記第２の金属部材
（３）側への部分的膨出変形、その部分的膨出変形によ
る溶融部分の排除、膨出変形部分（８）の前記第２の金
属部材（３）への当接および前記膨出変形部分（８）と
前記第２の金属部材（３）との抵抗溶接を順次現出させ
ることを特徴とする、融点を異にする二種の金属部材の
重ね合せ接合方法。 2. A first metal member (2) and its first gold.
Second metal member having a melting point higher than that of the metal member (2)
(3) is overlaid, and the overlaid part (4) is
The first metal member in joining by welding
It has a higher melting point than (2), and has plastic deformation and
The first that enables resistance welding with the second metal member (3), respectively.
The metal member (5, 5 1 ) of No. 3 and the overlapping portion (4)
At the first metal member (2), and then
At one of the electrodes (6), the circumference of the tip surface (15 1 )
Rounded edge (16 1 ) with radius R 3 of R 3 ≧ 2 mm
Been cylindrical protrusion (14 1) said front end surface (15 1)
Is brought into contact with the third metal member (5, 5 1 ),
By the electrode (6) and the other electrode (7),
Pressurize the second and third metal members (2, 3, 5, 5 1 )
The welding current between both electrodes (6, 7),
The current-carrying part (19) of the first metal member (2) and its vicinity
By the melting by the side, the cylindrical protrusion (14 1 )
The second metal member of the third metal member (5, 5 1 ).
Due to the partial bulging deformation toward the (3) side and the partial bulging deformation
The second gold of the bulging deformation part (8)
Abutting on the metal member (3) and the bulging deformation portion (8)
The resistance welding with the second metal member (3) is sequentially revealed.
Of two types of metal members with different melting points
Overlap joining method.
属部材（２）よりも高い融点を持つ第２の金属部材
（３）とを重ね合せて、その重ね合せ部分（４）をスポ
ット溶接により接合するに当り、前記第１の金属部材
（２）よりも高い融点を持ち、且つ塑性変形および前記
第２の金属部材（３）との抵抗溶接がそれぞれ可能な第
３の金属部材（５，５ 1 ）を、前記重ね合せ部分（４）
において前記第１の金属部材（２）に重ね合せ、次い
で、一方の電極（６）に在って、抜き勾配（１３）を有
する四角錐台形突出部（１４ 2 ）の小端面（１５）を前
記第３の金属部材（５，５ 1 ）に接触させて、その電極
（６）および他方の電極（７）により前記第１，第２お
よび第３の金属部材（２，３，５，５ 1 ）を加圧すると
共に両電極（６，７）間に溶接電流を流して、前記第１
の金属部材（２）の通電部分（１９）およびその近傍の
溶融、前記四角錐台形突出部（１４ 2 ）による前記第３
の金属部材（５，５ 1 ）の、前記第２の金属部材（３）
側への部分的膨出変形、その部分的膨出変形による溶融
部分の排除、膨出変形部分（８）の前記第２の金属部材
（３）への当接および前記膨出変形部分（８）と前記第
２の金属部材（３）との抵抗溶接を順次現出させること
を特徴とする、融点を異にする二種の金属部材の重ね合
せ接合方法。 3. A first metal member (2) and its first gold.
Second metal member having a melting point higher than that of the metal member (2)
(3) is overlaid, and the overlaid part (4) is
The first metal member in joining by welding
It has a higher melting point than (2), and has plastic deformation and
The first that enables resistance welding with the second metal member (3), respectively.
The metal member (5, 5 1 ) of No. 3 and the overlapping portion (4)
At the first metal member (2), and then
At one electrode (6) with a draft (13)
The small end face (15) of the truncated pyramid-shaped protrusion (14 2 )
The third metal member (5, 5 1 ) is brought into contact with the electrode
(6) and the other electrode (7), the first and second electrodes
And pressing the third metal member (2, 3, 5, 5 1 )
A welding current is made to flow between both electrodes (6, 7), and the first
Of the current carrying part (19) of the metal member (2) of
Melting, the third by the truncated pyramidal protrusion (14 2 ).
The second metal member (3) of the metal member (5, 5 1 )
Side bulging deformation, melting due to the partial bulging deformation
Exclusion of parts, bulging and deforming part (8) of the second metal member
Contact with (3) and the bulging deformed portion (8) and the first
To sequentially show resistance welding with the metal member (3) of No. 2
Of two kinds of metal members with different melting points
How to join.
属部材（２）よりも高い融点を持つ第２の金属部材
（３）とを重ね合せて、その重ね合せ部分（４）をスポ
ット溶接により接合するに当り、前記第１の金属部材
（２）よりも高い融点を持ち、且つ塑性変形および前記
第２の金属部材（３）との抵抗溶接がそれぞれ可能な第
３の金属部材（５，５ 1 ）を、前記重ね合せ部分（４）
において前記第１の金属部材（２）に重ね合せ、次い
で、一方の電極（６）に在って、先端面（１５ 1 ）の周
縁部に丸み（１６ 1 ）を付された四角柱状突出部（１４
3 ）の前記先端面（１５ 1 ）を前記第３の金属部材
（５，５ 1 ）に接触させて、その電極 （６）および他方
の電極（７）により前記第１，第２および第３の金属部
材（２，３，５，５ 1 ）を加圧すると共に両電極（６，
７）間に溶接電流を流して、前記第１の金属部材（２）
の通電部分（１９）およびその近傍の溶融、前記四角柱
状突出部（１４ 3 ）による前記第３の金属部材（５，５
1 ）の、前記第２の金属部材（３）側への部分的膨出変
形、その部分的膨出変形による溶融部分の排除、膨出変
形部分（８）の前記第２の金属部材（３）への当接およ
び前記膨出変形部分（８）と前記第２の金属部材（３）
との抵抗溶接を順次現出させることを特徴とする、融点
を異にする二種の金属部材の重ね合せ接合方法。 4. A first metal member (2) and its first gold.
Second metal member having a melting point higher than that of the metal member (2)
(3) is overlaid, and the overlaid part (4) is
The first metal member in joining by welding
It has a higher melting point than (2), and has plastic deformation and
The first that enables resistance welding with the second metal member (3), respectively.
The metal member (5, 5 1 ) of No. 3 and the overlapping portion (4)
At the first metal member (2), and then
At one of the electrodes (6), the circumference of the tip surface (15 1 )
Square-shaped protrusion (14) with rounded edges (16 1 )
3 ) The tip surface (15 1 ) of the third metal member
(5, 5 1 ) in contact with its electrode (6) and the other
The first, second and third metal parts by the electrode (7) of
While pressing the material (2, 3, 5, 5 1 ), both electrodes (6, 6)
7) Applying a welding current between the first metal member (2)
Of the current-carrying part (19) and its vicinity, the square pole
Of the third metal member (5, 5) by the protrusion (14 3 ).
Partial bulging of 1 ) toward the second metal member (3) side
Shape, elimination of melted part due to partial bulging deformation, bulging deformation
Abutment of the shaped part (8) on the second metal member (3) and
And the bulging deformation part (8) and the second metal member (3)
Melting point, which is characterized by the sequential appearance of resistance welding with
A method of superposing and joining two kinds of metal members having different types.
記第１の金属部材（２）との対向面（２１）に接着剤
（２２）を塗布されている、請求項１，２，３または４
記載の融点を異にする二種の金属部材の重ね合せ接合方
法。5. The adhesive (22) is applied to a surface (21) of the third metal member (5, 5 1 ) facing the first metal member (2). , 2, 3 or 4
A method for laminating and joining two kinds of metal members having different melting points as described.
記第１の金属部材（２）との対向面（２１）にシーリン
グ材（２３）を塗布され、また前記重ね合せ部分（４）
において前記第１および第２の金属部材（２，３）間に
シーリング材（２３）を介在させる、請求項１，２，３
または４記載の融点を異にする二種の金属部材の重ね合
せ接合方法。6. A sealing material (23) is applied to a surface (21) of the third metal member (5, 5 1 ) which faces the first metal member (2), and the overlapping portion is formed. (4)
A sealing material (23) is interposed between the first and second metal members (2, 3) in claim 1 .
Alternatively, the method of superposing and joining two kinds of metal members having different melting points described in 4 above.
能であり、前記第３の金属部材（５1 ）は前記第２の金
属部材（３）の一部を折り返すことにより形成される、
請求項１，２，３，４または６記載の融点を異にする二
種の金属部材の重ね合せ接合方法。 7. The second metal member (3) is plastically deformable, and the third metal member (5 1 ) is formed by folding back a part of the second metal member (3). The
A method of superposing and joining two kinds of metal members having different melting points according to claim 1 , 2, 3, 4 or 6 .
Ａｌ系合金の一方より構成され、前記第２および第３の
金属部材（３，５，５1 ）はＦｅおよびＦｅ系合金の一
方より構成される、請求項１，２，３，４，５，６また
は７記載の融点を異にする二種の金属部材の重ね合せ接
合方法。8. The first metal member (2) is made of one of Al and an Al-based alloy, and the second and third metal members (3, 5, 5 1 ) are made of Fe and an Fe-based alloy. Meanwhile more composed claim 1,2,3,4,5, 6 or <br/> the superposition method of joining two metal members having different melting points of 7, wherein.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26346995A JP3400207B2 (en) | 1995-09-18 | 1995-09-18 | Overlap joining method of two kinds of metal members having different melting points |
| US09/043,397 US6037559A (en) | 1995-09-18 | 1996-09-18 | Process for lap joining two kinds of metallic members having different melting points |
| CA002232480A CA2232480C (en) | 1995-09-18 | 1996-09-18 | Process for lap-bonding of two metal members having different melting points |
| DE69637674T DE69637674D1 (en) | 1995-09-18 | 1996-09-18 | METHOD FOR CONNECTING OVERLAPPING EDGES OF TWO METALIC OBJECTS OF DIFFERENT MELTING TEMPERATURES |
| PCT/JP1996/002676 WO1997010920A1 (en) | 1995-09-18 | 1996-09-18 | Method of lap joining two kinds of metallic members having different melting points |
| EP96931233A EP0865860B1 (en) | 1995-09-18 | 1996-09-18 | Method of lap joining two kinds of metallic members having different melting points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26346995A JP3400207B2 (en) | 1995-09-18 | 1995-09-18 | Overlap joining method of two kinds of metal members having different melting points |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0985454A JPH0985454A (en) | 1997-03-31 |
| JP3400207B2 true JP3400207B2 (en) | 2003-04-28 |
Family
ID=17389947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26346995A Expired - Fee Related JP3400207B2 (en) | 1995-09-18 | 1995-09-18 | Overlap joining method of two kinds of metal members having different melting points |
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| JP (1) | JP3400207B2 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1240148C (en) | 2000-11-01 | 2006-02-01 | 索尼株式会社 | Cell, cell production method, welded article production method and pedestal |
| JP2003236673A (en) * | 2002-02-19 | 2003-08-26 | Toyota Motor Corp | Method for joining different kinds of materials |
| JP4253528B2 (en) * | 2003-05-23 | 2009-04-15 | 本田技研工業株式会社 | Aluminum member connection method |
| JP4722193B2 (en) * | 2009-04-02 | 2011-07-13 | セキ工業株式会社 | Plate lamination structure, plate reinforcement structure, plate connection structure, and plate lamination method |
| DE102013201183A1 (en) * | 2013-01-25 | 2014-07-31 | Zf Friedrichshafen Ag | Connecting arrangement and method for joining a component |
| WO2015117059A1 (en) * | 2014-02-03 | 2015-08-06 | Alcoa Inc. | Resistance welding fastener, apparatus and methods |
| JP5970016B2 (en) * | 2014-03-28 | 2016-08-17 | 富士重工業株式会社 | Member joint structure |
| EP3233360B1 (en) | 2014-12-15 | 2022-09-28 | Howmet Aerospace Inc. | Resistance welding fastener, apparatus and methods for joining similar and dissimilar materials |
| EP3254795A1 (en) * | 2016-06-09 | 2017-12-13 | Outokumpu Oyj | Resistance spot welding electrode and use of the electrode |
| JP2018047477A (en) * | 2016-09-20 | 2018-03-29 | 株式会社神戸製鋼所 | Arc-welding method for joining dissimilar material, joint auxiliary member and dissimilar material welding coupling |
| CN111356609B (en) * | 2017-11-15 | 2022-03-25 | 日本发条株式会社 | Joint body and seat frame for automobile |
| KR102133092B1 (en) * | 2018-09-27 | 2020-07-10 | 현대제철 주식회사 | Dissimilar-material joint body and jointing method thereof |
| JP7111665B2 (en) * | 2019-08-07 | 2022-08-02 | 株式会社神戸製鋼所 | Arc stud welding method for joining dissimilar materials |
| JP6793427B1 (en) * | 2020-06-25 | 2020-12-02 | セキ工業株式会社 | Dissimilar material joining structure and dissimilar material joining method |
| CN113857637B (en) * | 2021-10-22 | 2023-03-14 | 中国科学院上海光学精密机械研究所 | Resistance spot welding device for light metal and steel stacked piece and welding method thereof |
-
1995
- 1995-09-18 JP JP26346995A patent/JP3400207B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0985454A (en) | 1997-03-31 |
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