WO2023013067A1

WO2023013067A1 - Method for joining metal member and resin member together, and joint structure

Info

Publication number: WO2023013067A1
Application number: PCT/JP2021/029423
Authority: WO
Inventors: 業飛高; 尚嗣山本; 匡昭山本; 金孫廖; 英俊藤井; 好昭森貞
Original assignee: 株式会社栗本鐵工所; 国立大学法人大阪大学
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-02-09
Also published as: JPWO2023013067A1; CN117480027A

Abstract

According to the present invention, when joining a metal member and a resin member by butting side surfaces of the metal member and resin member together, side surfaces of a metal member (1) and a resin member (2) having an equal plate thickness are butted together at a butt interface 3; a metal thin plate (4) is placed over one of flat surfaces formed by the butted metal member (1) and resin member (2); and a rotating rotary tool (7) is pushed in from the front surface side of the metal thin plate (4) with a probe portion (8) of the rotary tool (7) disposed on the metal member (1) side at an offset from the butt interface (3), and the rotating rotary tool (7) is moved along the butt interface (3) to join the metal member (1), the resin member (2), and the metal thin plate (4) to each other.

Description

金属部材と樹脂部材の接合方法及び接合構造METHOD AND STRUCTURE FOR JOINING METAL MEMBER AND RESIN MEMBER

　本発明は、金属部材と樹脂部材の接合方法及び接合構造に関する。 The present invention relates to a method and structure for joining metal members and resin members.

　従来、軽量化等のために、家電や自動車等の様々な分野における製品にて、金属材料と樹脂材料とを併用することが一般的に行われており、金属部材と樹脂部材を接合する需要も増加している。 Conventionally, it has been common practice to use both metal materials and resin materials together in products in various fields such as home appliances and automobiles in order to reduce weight. is also increasing.

　このように金属部材と樹脂部材とを接合する場合、従来は接着剤を用いる方法、ボルト止め等の機械的結合方法の他、新しい技術として局所的に熱を与えることができる摩擦撹拌接合(ＦＳＷ)も利用されている（例えば、特許文献１参照）。 When joining a metal member and a resin member in this way, in addition to the conventional method using adhesives and mechanical joining methods such as bolting, as a new technology friction stir welding (FSW) that can apply heat locally ) is also used (see, for example, Patent Document 1).

　この金属材料と樹脂材料を重ね合わせて接合する摩擦撹拌接合では、金属部材と樹脂部材の少なくとも一部を互いに重ね合わせ、樹脂部材側からツールを金属部材に向かって圧入するようにしている。 In friction stir welding, in which a metal material and a resin material are overlapped and joined, at least a part of the metal member and the resin member are overlapped, and a tool is press-fitted from the resin member side toward the metal member.

　また、特許文献２では、裏当て金上に金属薄板同士の一端を所定長さ重ね合わせ、回転ツールによる摩擦熱と押圧力によって金属薄板同士の突き合わせ形状の継手を形成している。 In addition, in Patent Document 2, one ends of thin metal plates are overlapped on a backing metal for a predetermined length, and a butt-shaped joint between the thin metal plates is formed by frictional heat and pressing force from a rotating tool.

特開２０１９－１４７２９３号公報JP 2019-147293 A 特開２０１８－１６４９１３号公報JP 2018-164913 A

　従来の接着剤を用いる方法等の機械的結合方法においては、接合部の信頼性等に問題があった。　In conventional mechanical bonding methods such as those using adhesives, there were problems with the reliability of the joints.

　また特許文献１のものでは、金属材料と樹脂材料を重ね合わせた接合は可能であるが、突き合わせた接合は接合面積が小さく必要な接合強度が得られなかったり、ツールが接触する樹脂面が摩擦熱や押圧力によって破壊されたりする等の問題があった。 In Patent Document 1, although it is possible to join a metal material and a resin material on top of each other, butt joining has a small joining area and the required joining strength cannot be obtained, and the resin surface in contact with the tool is rubbed. There are problems such as being destroyed by heat or pressing force.

　さらに特許文献２のものでは、金属材料同士の一部を重ね合わせて摩擦接合により突き合わせ形状の継手を形成することは可能であるが、金属材料と樹脂材料への同接合方法の適用は上記と同様の問題によって困難であった。 Furthermore, in Patent Document 2, although it is possible to form a butt-shaped joint by friction welding by partially overlapping metal materials, the application of the same joining method to metal materials and resin materials is as described above. It was complicated by similar problems.

　本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、樹脂面が摩擦熱や押圧力によって破壊されるのを防ぎながら必要な接合強度が得られるようにすることにある。 The present invention has been made in view of this point, and its object is to obtain the necessary bonding strength while preventing the resin surface from being destroyed by frictional heat and pressing force. be.

　上記の目的を達成するために、この発明では、金属部材及び樹脂部材の突き合わせ界面上に重ねた金属薄板の上から、回転ツールのプローブ部を突き合わせ界面から金属部材側にずらして圧入して突き合わせ界面に沿って移動するようにした。 In order to achieve the above object, in the present invention, a probe portion of a rotary tool is shifted from the abutting interface toward the metal member side from the abutting interface of the metal member and the resin member and pressed into the thin metal plate superimposed on the abutting interface of the metal member and the resin member. Made it move along the interface.

　具体的には、第１の発明では、板厚の同じ金属部材及び樹脂部材の側面同士を突き合わせ界面において突き合わせる突き合わせ工程と、
　突き合わせた上記金属部材及び上記樹脂部材により形成された平坦な一方の面に金属薄板を重ね合わせる重ね合わせ工程と、
　上記金属薄板の表面側から上記突き合わせ界面よりも上記金属部材側にずらして回転ツールのプローブ部が配置されるようにして、回転する回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合される接合工程とを含む構成とする。 Specifically, in the first invention, a butting step in which side surfaces of a metal member and a resin member having the same plate thickness are butted against each other at a butting interface;
a superposing step of superimposing a thin metal plate on one flat surface formed by the butted metal member and the resin member;
By displacing the probe portion of the rotary tool from the surface side of the thin metal plate to the metal member side of the abutting interface, the rotating rotary tool is press-fitted and moved along the abutting interface. and a joining step of joining the metal member, the resin member, and the thin metal plate to each other.

　上記の構成によると、側面を突き合わされた同一の厚みを持つ金属部材と樹脂部材に形成された突き合わせ界面上に金属薄板が重ね合わされ、金属部材側にずらした状態で、回転ツールが金属薄板側から圧入されて突き合わせ界面に沿って移動して摩擦撹拌接合することにより、金属部材と金属薄板、金属部材と樹脂部材、及び樹脂部材と金属薄板のそれぞれの接合界面において、撹拌効果、摩擦熱、及びツールの圧力により接合される。これにより、樹脂面が破壊されないで接合が行われる。なお、「板厚の同じ」の意味するところは、製造誤差などの、多少の板厚の差があってもよいことを意味する。 According to the above configuration, the thin metal plate is superimposed on the abutting interface formed between the metal member and the resin member having the same thickness and having the side faces butted against each other. are press-fitted from and moved along the butt interface to perform friction stir welding, so that at each joint interface between the metal member and the thin metal plate, the metal member and the resin member, and the resin member and the thin metal plate, the stirring effect, frictional heat, and are joined by the pressure of the tool. Thereby, joining is performed without destroying the resin surface. In addition, what is meant by "having the same plate thickness" means that there may be a slight difference in plate thickness due to a manufacturing error or the like.

　第２の発明では、第１の発明において、
　上記プローブ部の先端外周が、上記金属部材と上記樹脂部材の突き合わせ界面の近傍で且つ超えないように上記回転ツールを上記突き合わせ界面からずらした状態で、上記回転ツールを圧入して上記突き合わせ界面に沿って移動する。 In the second invention, in the first invention,
In a state in which the rotating tool is shifted from the abutting interface so that the outer periphery of the tip of the probe portion is in the vicinity of the abutting interface between the metal member and the resin member but does not exceed the abutting interface, the rotating tool is press-fitted to the abutting interface. move along.

　上記の構成によると、突き合わせ界面を超えないようにしながらできるだけ突き合わせ界面に近付けることで、樹脂面の破壊を防ぎつつも、必要な接合強度が得られる。 According to the above configuration, it is possible to obtain the necessary bonding strength while preventing breakage of the resin surface by making it as close to the butt interface as possible while not exceeding the butt interface.

　第３の発明では、第１又は第２の発明において、
　上記プローブ部の先端外周が、上記金属部材と上記樹脂部材の突き合わせ界面と一致するように上記回転ツールを上記突き合わせ界面からずらした状態で、上記回転ツールを圧入して上記突き合わせ界面に沿って移動する。 In a third invention, in the first or second invention,
In a state in which the rotating tool is shifted from the butting interface so that the outer periphery of the tip of the probe portion coincides with the butting interface between the metal member and the resin member, the rotating tool is press-fitted and moved along the butting interface. do.

　上記の構成によると、プローブ径が変わっても位置決めがしやすい上に、樹脂面の破壊を防ぎながら必要な接合強度が得られる。また、プローブ部側面と樹脂との過度の接触を抑制しながら樹脂に対して熱を多く与えることができるため、接合速度を早くすることで作業性が向上する。 According to the above configuration, positioning is easy even if the probe diameter changes, and the required bonding strength can be obtained while preventing breakage of the resin surface. Further, since a large amount of heat can be applied to the resin while suppressing excessive contact between the side surface of the probe portion and the resin, workability is improved by increasing the bonding speed.

　第４の発明では、第１から第３のいずれか１つの発明において、
　上記接合工程において、上記突き合わせ界面の裏側から裏当て金の平坦面を押し当てて支持した状態で上記回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、
　上記接合工程の後の上記金属部材と上記樹脂部材において、少なくとも上記金属薄板の反対側を平坦とする構成とする。 In a fourth invention, in any one of the first to third inventions,
In the joining step, the rotary tool is press-fitted and moved along the butt interface while the flat surface of the backing metal is pressed against and supported from the back side of the butt interface.
In the metal member and the resin member after the bonding step, at least the opposite side of the thin metal plate is flat.

　上記の構成によると、少なくとも一方側の面が平坦で綺麗な仕上がりとなる。 According to the above configuration, at least one surface is flat and has a clean finish.

　第５の発明では、第１から第４のいずれか１つの発明において、
　上記金属部材及び上記樹脂部材の板厚よりも薄い上記金属薄板を用いる構成とする。 In a fifth invention, in any one of the first to fourth inventions,
The thin metal plate having a thickness smaller than that of the metal member and the resin member is used.

　上記の構成によると、樹脂部材の破壊を防ぎながら、適度に金属部材及び樹脂部材を摩擦撹拌できる。 According to the above configuration, the metal member and the resin member can be moderately friction-stirred while preventing the destruction of the resin member.

　第６の発明では、第１から第５のいずれか１つの発明において、
　上記樹脂部材は、熱可塑性樹脂であり、上記接合工程において、該樹脂部材の少なくとも一部が溶融し、塑性変形した上記金属薄板が上記金属部材と接合されると共に、上記樹脂部材側に流れ込んだ後、硬化して接合される。 In a sixth invention, in any one of the first to fifth inventions,
The resin member is a thermoplastic resin, and at least part of the resin member is melted in the joining step, and the plastically deformed thin metal plate is joined to the metal member and flows into the resin member side. It is then cured and joined.

　上記の構成によると、樹脂部材は直接撹拌されるのではなく、熱で溶けた後、塑性変形して流れ込んできた金属薄板と接合されるので、樹脂部材が破壊されない。 According to the above configuration, the resin member is not directly stirred, but melted by heat and then plastically deformed and joined to the inflowing thin metal plate, so the resin member is not destroyed.

　第７の発明では、第１から第６のいずれか１つの発明において、
　上記接合工程において、上記プローブ部の先面が上記金属薄板と上記金属部材との界面よりも上記金属薄板側に０．１５ｍｍ以下から、上記金属薄板と上記金属部材との上記界面よりも上記金属部材側に０．３０ｍｍ以下までの範囲に侵入した状態で、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合される構成とする。 In a seventh invention, in any one of the first to sixth inventions,
In the bonding step, the front surface of the probe portion is located 0.15 mm or less on the thin metal plate side of the interface between the thin metal plate and the metal member, and the metal tip is positioned closer to the thin metal plate than the interface between the thin metal plate and the metal member. The metal member, the resin member, and the thin metal plate are bonded to each other in a state in which they are intruded into a range of 0.30 mm or less on the side of the member.

　プローブ部の先面が金属薄板と金属部材との界面よりも金属薄板側に０．１５ｍｍよりも離れて浅く侵入した場合には、金属薄板の撹拌が不足することにより十分な接合強度が得られず、金属薄板と金属部材との界面よりも金属部材側に０．３０ｍｍよりも深く侵入した場合には、金属部材と金属薄板が同時に撹拌されることにより欠陥が生じやすくなるおそれがあることから、プローブ部の先面が適度な位置に侵入した状態であると、適度に金属部材及び樹脂部材を摩擦撹拌接合できる。 When the front surface of the probe portion penetrates into the thin metal plate at a distance of more than 0.15 mm from the interface between the thin metal plate and the metal member, sufficient bonding strength cannot be obtained due to insufficient agitation of the thin metal plate. However, if the metal member penetrates deeper than 0.30 mm from the interface between the thin metal plate and the metal member, the metal member and the thin metal plate may be stirred at the same time, which may cause defects. When the front surface of the probe portion is in a state in which it enters an appropriate position, friction stir welding of the metal member and the resin member can be performed appropriately.

　第８の発明では、第１から第７のいずれか１つの発明において、
　上記プローブ部の長さが、上記金属薄板の厚さと同じである構成とする。 In an eighth invention, in any one of the first to seventh inventions,
The length of the probe portion is the same as the thickness of the thin metal plate.

　上記の構成によると、プローブ部の侵入深さとショルダ部の侵入深さを制御しやすい。 According to the above configuration, it is easy to control the penetration depth of the probe portion and the penetration depth of the shoulder portion.

　第９の発明では、第１から第８のいずれか１つの発明において、
　上記接合工程において、上記プローブ部の回転数が１５００ｒｐｍ以上２０００ｒｐｍ以下で、接合速度が１００ｍｍ／ｍｉｎ以上３００ｍｍ／ｍｉｎ以下である構成とする。 In a ninth invention, in any one of the first to eighth inventions,
In the bonding step, the number of rotations of the probe unit is 1500 rpm or more and 2000 rpm or less, and the bonding speed is 100 mm/min or more and 300 mm/min or less.

　プローブ部の回転数が１５００ｒｐｍよりも遅いと、入熱が小さすぎてプローブ部が圧入しにくくなり、２０００ｒｐｍよりも速いと、入熱が大きすぎて樹脂部材の表面が熱により破壊されるおそれがあり、接合速度が１００ｍｍ／ｍｉｎよりも遅くても、入熱が大きすぎて樹脂部材の表面が熱により破壊されるおそれがあり、３００ｍｍ／ｍｉｎよりも速いと入熱量が小さくなる。これらの結果として接合構造に悪影響を及ぼす。しかし、上記の構成によると、樹脂部材の破壊を防ぎながら、適度に金属部材及び樹脂部材を摩擦撹拌接合できる。 If the rotation speed of the probe portion is slower than 1500 rpm, the heat input is too small to make it difficult to press-fit the probe portion. Yes, even if the joining speed is slower than 100 mm/min, the heat input is too large and the surface of the resin member may be thermally destroyed. These results adversely affect the joint structure. However, according to the above configuration, the metal member and the resin member can be properly friction-stir-welded while preventing the destruction of the resin member.

　第１０の発明では、板厚の同じ金属部材及び樹脂部材の側面同士を突き合わせ界面において突き合わせ、該金属部材及び樹脂部材により形成された平坦な一方の面に金属薄板を重ね合わせた状態で金属薄板の表面側から、回転する回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合された金属部材と樹脂部材の接合構造を対象とし、
　上記接合構造は、
　上記回転ツールにより塑性変形した上記金属薄板が、少なくとも一部が溶融した上記樹脂部材側に流れ込んで接合されており、
　上記金属薄板が上記樹脂部材側に流れ込む量は、該回転ツールにより塑性変形した上記金属部材が上記樹脂部材側に流れ込む量よりも多い。 In the tenth invention, the side surfaces of the metal member and the resin member having the same plate thickness are butted against each other at the butting interface, and the metal thin plate is superimposed on one flat surface formed by the metal member and the resin member. A joining structure of a metal member and a resin member in which the metal member, the resin member, and the thin metal plate are joined to each other is formed by press-fitting a rotating rotary tool from the surface side and moving along the abutting interface. targeted,
The above joint structure is
The thin metal plate plastically deformed by the rotating tool flows into and is joined to the resin member that is at least partially melted,
The amount of the thin metal plate flowing into the resin member is larger than the amount of the metal member plastically deformed by the rotary tool flowing into the resin member.

　上記の構成によると、溶融した樹脂部材側に塑性変形した金属薄板が流れ込むように接合されているので、樹脂部材が硬化した後は確実に接合されると共に、樹脂面が破壊されないので接合強度が高く、見映えのよい接合構造が得られる。 According to the above configuration, since the plastically deformed thin metal plate is joined so as to flow into the molten resin member side, the joint is ensured after the resin member is cured, and the joint strength is increased because the resin surface is not destroyed. A high and attractive joint structure can be obtained.

　第１１の発明では、第１０の発明において、
　上記金属部材と上記樹脂部材との接合部分は、少なくとも上記金属薄板の反対側が平坦である。 In the eleventh invention, in the tenth invention,
A joint portion between the metal member and the resin member is flat at least on the side opposite to the thin metal plate.

　上記の構成によると、接合部分の一方側が平坦で見映えがよく接合強度の高い接合構造が得られる。 According to the above configuration, one side of the joint portion is flat, and a joint structure with good appearance and high joint strength can be obtained.

　以上説明したように、本発明によれば、金属部材と樹脂部材の側面を突き合わせて接合しても、樹脂面が摩擦熱や押圧力によって破壊されるのを防ぎながら必要な接合強度が得られる。 As described above, according to the present invention, even when the side surfaces of a metal member and a resin member are butted and joined together, the necessary joint strength can be obtained while preventing the resin surface from being destroyed by frictional heat or pressing force. .

金属板と樹脂板とを接合する様子を示す断面図である。It is sectional drawing which shows a mode that a metal plate and a resin plate are joined. 金属板と樹脂板とを接合した様子を示す断面図である。It is sectional drawing which shows a mode that the metal plate and the resin plate were joined. 接合速度とツールの回転速度とを変化させた場合の仕上がりを比較したグラフである。4 is a graph comparing the finish when the welding speed and the rotation speed of the tool are changed. ツール回転数と接合速度を変化させたときの最大引張試験力を比較したグラフである。It is the graph which compared the maximum tensile test force when changing tool rotation speed and welding speed. 実施例１を示し、（ａ）が平面図で、（ｂ）が底面図である。Example 1 is shown, (a) is a plan view, and (b) is a bottom view. 実施例１を示す拡大断面図である。2 is an enlarged cross-sectional view showing Example 1. FIG. 実施例１を示す断面図である。1 is a cross-sectional view showing Example 1. FIG. 実施例２を示す断面図である。FIG. 5 is a cross-sectional view showing Example 2; 比較例１を示す平面図であるFIG. 10 is a plan view showing Comparative Example 1; 比較例２を示す平面図である。FIG. 11 is a plan view showing Comparative Example 2; 比較例２を示す断面図である。FIG. 8 is a cross-sectional view showing Comparative Example 2;

　以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described based on the drawings.

　図１及び図２は、本発明の実施形態の、金属部材１と樹脂部材２の接合方法を示す。この接合方法では、金属部材１及び樹脂部材２の突き合わせ界面３上に重ねた金属薄板４の上から、回転ツール７のプローブ部８を突き合わせ界面３から金属部材１側にずらして圧入して突き合わせ界面３に沿って移動するようにしている。 1 and 2 show a method of joining a metal member 1 and a resin member 2 according to an embodiment of the present invention. In this joining method, a probe portion 8 of a rotating tool 7 is shifted from the butting interface 3 toward the metal member 1 side from the metal thin plate 4 superimposed on the butting interface 3 of the metal member 1 and the resin member 2 and press-fitted. He is trying to move along the interface 3.

　具体的な接合方法について図面を用いて説明する。 A specific joining method will be explained using drawings.

　まず、板厚の同じ金属部材１及び樹脂部材２を用意する。また、金属部材１及び樹脂部材２の板厚よりも薄い金属薄板４も用意する。ここで、「板厚の同じ」の意味するところは、製造誤差などの、多少の板厚の差があってもよいことを意味する。 First, a metal member 1 and a resin member 2 having the same plate thickness are prepared. A thin metal plate 4 thinner than the metal member 1 and the resin member 2 is also prepared. Here, "same thickness" means that there may be a slight difference in thickness due to manufacturing error or the like.

　例えば、金属部材１は、摩擦撹拌接合が可能な、マグネシウム合金、アルミニウム合金などの軽金属の板部材よりなる。樹脂部材２は、金属部材１と同じ板厚の熱可塑性樹脂材よりなる。金属薄板４は、摩擦撹拌接合が可能な、マグネシウム合金、アルミニウム合金などの軽金属の薄板部材よりなり、少なくとも金属部材１及び樹脂部材２よりも板厚が薄い。金属部材１と金属薄板４は同じ材料であってもよいし、異なる材料であってもよい。さらに、金属部材１及び金属薄板の材料は、軽金属でなくても摩擦撹拌接合が可能な金属であれば特に限定されない。樹脂部材２は、熱硬化性樹脂でも多少塑性変形するので適用可能であるが、熱可塑性樹脂の方が溶融過程を利用できるので好ましい。 For example, the metal member 1 is made of a light metal plate member such as a magnesium alloy or an aluminum alloy that can be friction stir welded. The resin member 2 is made of a thermoplastic resin material having the same plate thickness as the metal member 1 . The thin metal plate 4 is made of a light metal thin plate member such as a magnesium alloy or an aluminum alloy that can be friction stir welded, and is thinner than at least the metal member 1 and the resin member 2 . The metal member 1 and the thin metal plate 4 may be made of the same material or may be made of different materials. Furthermore, the materials of the metal member 1 and the thin metal plate are not particularly limited as long as they are not light metals but can be friction stir welded. A thermosetting resin can be used as the resin member 2 because it undergoes plastic deformation to some extent, but a thermoplastic resin is preferable because a melting process can be used.

　次いで、突き合わせ工程において、金属部材１及び樹脂部材２の側面同士を突き合わせ界面３において突き合わせ、平坦な台（例えば、裏当て金１１）の上に載置する。 Then, in the butting step, the side surfaces of the metal member 1 and the resin member 2 are butted against each other at the butting interface 3 and placed on a flat base (for example, the backing metal 11).

　次いで、重ね合わせ工程において、突き合わせた金属部材１及び上記樹脂部材２により形成された平坦な一方の面（以下、上面５という）に金属薄板４を重ね合わせる。金属部材１と樹脂部材２とは、基本的に同じ板厚なので、金属薄板４を載置しやすい。なお、金属薄板４を載置した状態でも突き合わせ界面３の位置が分かるようにしておくとよい。 Then, in the stacking step, the thin metal plate 4 is stacked on one flat surface (hereinafter referred to as the top surface 5) formed by the butted metal member 1 and the resin member 2. Since the metal member 1 and the resin member 2 basically have the same plate thickness, the thin metal plate 4 can be easily placed. It should be noted that the position of the butted interface 3 should be made visible even when the thin metal plate 4 is placed.

　次いで、図１に示すように、接合工程において、まず、金属薄板４の表面側から突き合わせ界面３よりも金属部材１側にずらして回転ツール７のプローブ部８が配置されるようにして位置決めした後、所定速度で回転する回転ツール７を圧入し、突き合わせ界面３に沿って所定速度で移動させる。 Next, as shown in FIG. 1, in the joining step, first, the probe portion 8 of the rotating tool 7 was positioned so as to be shifted from the surface side of the thin metal plate 4 to the side of the metal member 1 with respect to the butting interface 3. After that, a rotating tool 7 that rotates at a predetermined speed is press-fitted and moved along the abutting interface 3 at a predetermined speed.

　このとき、プローブ部８の先端外周が、金属部材１と樹脂部材２の突き合わせ界面３の近傍で且つ超えないように、すなわち、できるだけプローブ部８の外周端部を突き合わせ界面３に近付けながらも突き合わせ界面３を超えないように、回転ツール７の位置決めをするのが望ましい。 At this time, the outer circumference of the tip of the probe part 8 is in the vicinity of the butt interface 3 between the metal member 1 and the resin member 2, but not beyond it. It is desirable to position the rotary tool 7 so that the interface 3 is not exceeded.

　これにより、図２に示すように、摩擦撹拌接合により、金属部材１、樹脂部材２、及び金属薄板４が互いに接合される。 Thereby, as shown in FIG. 2, the metal member 1, the resin member 2, and the thin metal plate 4 are joined together by friction stir welding.

　本実施形態の方法では、突き合わせ界面３から金属部材１側にずらした状態で回転ツール７を金属薄板４側から圧入して摩擦撹拌接合することにより、回転ツール７のプローブ部８が金属薄板４及び金属部材１のみに接触するようにして、接合構造１０において金属部材１と金属薄板４、金属部材１と樹脂部材２、及び樹脂部材２と金属薄板４のそれぞれの接合界面１２において、撹拌効果、摩擦熱、及びツールの圧力により接合される。これにより、樹脂面が破壊されないで接合が行われる。また、プローブ部８の側面と樹脂との過度の接触を抑制しながら樹脂に対して熱を多く与えることができるため、接合速度を早くすることで作業性が向上する。 In the method of the present embodiment, the rotating tool 7 is press-fitted from the thin metal plate 4 side in a state of being shifted from the butting interface 3 toward the metal member 1 to perform friction stir welding, whereby the probe portion 8 of the rotating tool 7 moves to the thin metal plate 4 . And only the metal member 1 is in contact with each of the joint interfaces 12 of the metal member 1 and the thin metal plate 4, the metal member 1 and the resin member 2, and the resin member 2 and the thin metal plate 4 in the joint structure 10. , frictional heat, and tool pressure. Thereby, joining is performed without destroying the resin surface. Moreover, since a large amount of heat can be applied to the resin while suppressing excessive contact between the side surface of the probe portion 8 and the resin, workability is improved by increasing the bonding speed.

　特に図１に示すように、プローブ部８の先端外周が、金属部材１と樹脂部材２の突き合わせ界面３と一致するように回転ツール７を突き合わせ界面３からずらした状態で、回転ツール７を圧入するようにしてもよい。そうすると、プローブ部８の外径が変わっても位置決めがしやすい上に、できるだけ突き合わせ界面３に近付けることで、樹脂面の破壊を防ぎながら必要な接合強度が得られる。 Particularly, as shown in FIG. 1, the rotating tool 7 is press-fitted in a state in which the rotating tool 7 is displaced from the butting interface 3 so that the outer circumference of the tip of the probe portion 8 coincides with the butting interface 3 between the metal member 1 and the resin member 2. You may make it Then, even if the outer diameter of the probe part 8 is changed, positioning is easy, and by bringing the probe part 8 as close to the abutting interface 3 as possible, the required bonding strength can be obtained while preventing breakage of the resin surface.

　また、上記接合工程において、突き合わせ界面３の裏側となる下面６側から裏当て金１１の平坦面を押し当てて支持した状態で回転ツール７を圧入することにより、接合工程後の金属部材１と樹脂部材２において、少なくとも金属薄板４の反対側の下面６が平坦となる。これにより、少なくとも下面６側が平坦で綺麗な仕上がりとなる。 In the joining step, the metal member 1 after the joining step is press-fitted while the flat surface of the backing metal 11 is pressed against and supported from the lower surface 6 side of the butted interface 3 . At least the lower surface 6 of the resin member 2 opposite to the thin metal plate 4 is flat. As a result, at least the lower surface 6 side is flat and beautifully finished.

　－実施例－
　金属部材１は、例えば、板厚２．０ｍｍ×７５ｍｍ×１５０ｍｍのマグネシウム合金(ＡＸＳ６２０)である。 -Example-
The metal member 1 is, for example, a magnesium alloy (AXS620) having a plate thickness of 2.0 mm×75 mm×150 mm.

　樹脂部材２は、例えば、板厚２．０ｍｍ×７５ｍｍ×１５０ｍｍの炭素繊維強化熱可塑性樹脂(ＣＦＲＴＰ)であり、この炭素繊維強化熱可塑性樹脂は、ＰＡ６(ポリアミド６)８０％、ＣＦ(炭素繊維)２０％よりなる。 The resin member 2 is, for example, a carbon fiber reinforced thermoplastic resin (CFRTP) having a plate thickness of 2.0 mm x 75 mm x 150 mm. ) consists of 20%.

　金属薄板４は、板厚１．０ｍｍ×７５ｍｍ×１５０ｍｍのマグネシウム合金(ＡＺ３１）である。 The thin metal plate 4 is a magnesium alloy (AZ31) with a plate thickness of 1.0 mm x 75 mm x 150 mm.

　回転ツール７は、例えば、ＳＫＤ（ダイス鋼）で形成された円柱状のショルダ部９の外径が１５ｍｍ、プローブ部８の外径が６ｍｍ、プローブ部８の長さが１．０ｍｍである。 In the rotary tool 7, for example, the outer diameter of the cylindrical shoulder portion 9 made of SKD (die steel) is 15 mm, the outer diameter of the probe portion 8 is 6 mm, and the length of the probe portion 8 is 1.0 mm.

　このように、プローブ部８の長さが、金属薄板４の厚さと同じであると、プローブ部８の侵入深さとショルダ部９の侵入深さを制御しやすいというメリットがある。 Thus, if the length of the probe portion 8 is the same as the thickness of the thin metal plate 4, there is an advantage that the penetration depth of the probe portion 8 and the penetration depth of the shoulder portion 9 can be easily controlled.

　接合条件は、例えば、回転ツール７の回転速度が１０００～３０００ｒｐｍ、接合速度が１００～３００ｍｍ／ｍｉｎで、プローブ部８の侵入深さが１．１ｍｍで、ショルダ部９の侵入深さが０．１ｍｍである。 The welding conditions are, for example, the rotation speed of the rotating tool 7 is 1000 to 3000 rpm, the welding speed is 100 to 300 mm/min, the penetration depth of the probe portion 8 is 1.1 mm, and the penetration depth of the shoulder portion 9 is 0.1 mm. 1 mm.

　回転ツール７の位置は、金属部材１側に回転ツール７の中心を移動させる。すなわち、実施例では、３ｍｍオフセットすることで、プローブ部８下端外周が突き合わせ界面３と一致する。突き合わせ界面３からの３ｍｍのオフセット量を保ちながら突き合わせ界面３に沿って回転するプローブ部８を移動させる。 The position of the rotating tool 7 is to move the center of the rotating tool 7 toward the metal member 1 side. That is, in the embodiment, the outer periphery of the lower end of the probe portion 8 matches the butt interface 3 by offsetting by 3 mm. While maintaining an offset amount of 3 mm from the butt interface 3, the probe part 8 rotating along the butt interface 3 is moved.

　図３に回転ツール７の回転速度と接合速度に関する接合条件を示す。回転ツール７の回転速度は、速いと入熱が大きくなり、接合速度は、速いと入熱が小さくなる。この関係から適切な条件が決まる。これは、入熱が小さすぎると、熱によって接合される金属部材１と樹脂部材２並びに金属薄板４と樹脂部材２において接合不良が生じ、入熱が大きすぎると樹脂部材２の表面が熱により破壊されることに起因する。また、回転ツール７の回転速度が１０００ｒｐｍでは入熱が小さすぎてプローブ部８が圧入しにくくなるという問題が発生する。接合速度が１００ｍｍ／ｍｉｎに遅くなると、回転ツール７の回転数が１５００ｒｐｍのときのみ良好な接合状態となった。回転数が２０００ｒｐｍでは、入熱が非常に大きい割に接合速度が遅いことから、樹脂部材２の表面が熱により破壊されるためである。　Fig. 3 shows the welding conditions related to the rotational speed of the rotary tool 7 and the welding speed. The faster the rotational speed of the rotating tool 7, the greater the heat input, and the faster the welding speed, the less the heat input. Appropriate conditions are determined from this relationship. This is because if the heat input is too small, the metal member 1 and the resin member 2 and the thin metal plate 4 and the resin member 2, which are to be joined by heat, will be poorly joined. caused by being destroyed. In addition, when the rotation speed of the rotary tool 7 is 1000 rpm, the heat input is too small, which causes a problem that the probe portion 8 is difficult to press fit. When the welding speed was slowed down to 100 mm/min, a good welding condition was obtained only when the rotating speed of the rotary tool 7 was 1500 rpm. This is because when the number of revolutions is 2000 rpm, the joining speed is slow despite the large heat input, so that the surface of the resin member 2 is destroyed by the heat.

　以上、回転ツール７の回転速度を１５００～２０００ｒｐｍとし、接合速度を１００～３００ｍｍ／ｍｉｎに設定することで、良好な接合構造が得られることを確認した。 As described above, it was confirmed that a good joint structure can be obtained by setting the rotation speed of the rotary tool 7 to 1500 to 2000 rpm and the welding speed to 100 to 300 mm/min.

　以下に実施例１、実施例２及び比較例の写真を示して説明する。 The photographs of Example 1, Example 2, and Comparative Example are shown and explained below.

　実施例１
　ショルダ径１５ｍｍ、プローブ径６ｍｍ、プローブ長さ１ｍｍ、回転数２０００ｒｐｍ、接合速度３００ｍｍ／ｍｉｎ、侵入深さ１．１ｍｍで接合を行った。その結果を図５～図７に示す。 Example 1
Bonding was performed with a shoulder diameter of 15 mm, a probe diameter of 6 mm, a probe length of 1 mm, a rotating speed of 2000 rpm, a bonding speed of 300 mm/min, and a penetration depth of 1.1 mm. The results are shown in FIGS. 5 to 7. FIG.

　実施例２
　ショルダ径１５ｍｍ、プローブ径６ｍｍ、プローブ長さ１ｍｍ、回転数１５００ｒｐｍ、接合速度３００ｍｍ／ｍｉｎ、侵入深さ１．１ｍｍで接合を行った。その結果を図８に示す。 Example 2
Bonding was performed with a shoulder diameter of 15 mm, a probe diameter of 6 mm, a probe length of 1 mm, a rotating speed of 1500 rpm, a bonding speed of 300 mm/min, and a penetration depth of 1.1 mm. The results are shown in FIG.

　図６に拡大して示すように、金属薄板４の右側表面の尖った部分は、ショルダ部９の接触部である。ショルダ部９の押圧力により金属薄板４が樹脂部材２にめり込んだ形状となる。図７を見ると左側表面はそのような尖った部分はない。ショルダ部９の径を大きくすると、その形状が変化する。また、図面では分かりにくいが、金属部材１裏面と裏当て金１１とのわずかなすき間に、溶融した樹脂部材２が入り込むこともある。 As shown enlarged in FIG. 6, the sharp portion on the right side surface of the thin metal plate 4 is the contact portion of the shoulder portion 9 . The thin metal plate 4 is recessed into the resin member 2 by the pressing force of the shoulder portion 9 . Looking at FIG. 7, the left surface has no such sharp portion. Increasing the diameter of the shoulder portion 9 changes its shape. Further, although it is difficult to see in the drawing, the molten resin member 2 may enter a slight gap between the back surface of the metal member 1 and the backing metal 11 .

　図８は、回転数を２０００ｒｐｍから１５００ｒｐｍに落とした実施例２に関する断面であり、この場合も実施例１と同様に良好な接合結果が得られた。 FIG. 8 is a cross section of Example 2 in which the number of revolutions was reduced from 2000 rpm to 1500 rpm, and in this case as well as in Example 1, good joining results were obtained.

　図４に良好な継手が得られた接合パラメータにおける、継手の引張試験結果を示す。試験片は、図５（ａ）に示すように、接合後の材料において、接合部を中心とした幅１５ｍｍの棒状のものとした。 Fig. 4 shows the tensile test results of the joints at the joint parameters at which good joints were obtained. As shown in FIG. 5( a ), the test piece was a rod-shaped one with a width of 15 mm centering on the joint portion in the material after joining.

　接合構造の最大引張試験力は、実施例１の回転ツール７の回転数を２０００ｒｐｍ、接合速度を３００ｍｍ／ｍｉｎとしたときに最も高く１６８５Ｎであった。これは１５ｍｍ幅、板厚２．０ｍｍの試験片におけるＣＦＲＴＰ母材強度の６４％に相当する。 The maximum tensile test force of the joint structure was the highest at 1685 N when the number of revolutions of the rotating tool 7 of Example 1 was 2000 rpm and the joining speed was 300 mm/min. This corresponds to 64% of the strength of the CFRTP base material in a test piece with a width of 15 mm and a thickness of 2.0 mm.

　図５～図７に示した接合構造１０では、回転ツール７により塑性変形した金属薄板４が、少なくとも一部が溶融した樹脂部材２側に流れ込んでいる。 In the joint structure 10 shown in FIGS. 5 to 7, the thin metal plate 4 plastically deformed by the rotary tool 7 flows into the resin member 2, at least partially of which is melted.

　金属薄板４が樹脂部材２側に流れ込む量は、回転ツール７により塑性変形した金属部材１が樹脂部材２側に流れ込む量よりも多い。 The amount of the thin metal plate 4 flowing into the resin member 2 side is greater than the amount of the metal member 1 plastically deformed by the rotary tool 7 flowing into the resin member 2 side.

　金属部材１及び樹脂部材２は、板厚２ｍｍ以外でも、ツール走査条件が変わるだけで、特に問題ない。金属薄板４の板厚も１ｍｍ以外でも、プローブ部８の長さを板厚により変更したり、走査条件を変更したりすれば、特に問題ない。上記実施例では、金属部材１としてＡＸＳ６２０を使用しているが、金属薄板４と同じＡＺ３１を用いてもよい。 For the metal member 1 and the resin member 2, even if the plate thickness is other than 2 mm, there is no particular problem as long as the tool scanning conditions are changed. Even if the thickness of the thin metal plate 4 is other than 1 mm, there is no particular problem if the length of the probe portion 8 is changed according to the thickness or the scanning conditions are changed. Although AXS620 is used as the metal member 1 in the above embodiment, AZ31, which is the same as the thin metal plate 4, may be used.

　このように、金属部材１と金属薄板４の界面は主に回転ツール７の撹拌効果によって接合し、樹脂部材２と金属薄板４の界面は主に回転ツール７のショルダ部９の摩擦熱及び回転ツール７の押圧力によって接合し、金属部材１と樹脂部材２の突き合わせ界面３は主に撹拌効果及び摩擦熱によって接合することで、突き合わせた樹脂部材２と金属部材１の外表面のうち少なくとも下面６が凹凸のない平面を持つ構造とすることができる。 In this way, the interface between the metal member 1 and the thin metal plate 4 is mainly joined by the stirring effect of the rotating tool 7, and the interface between the resin member 2 and the thin metal plate 4 is mainly due to the frictional heat and rotation of the shoulder portion 9 of the rotating tool 7. The metal member 1 and the resin member 2 are joined by the pressing force of the tool 7, and the abutting interface 3 of the metal member 1 and the resin member 2 is joined mainly by the stirring effect and the frictional heat. 6 can have a structure having a flat surface without unevenness.

　また、プローブ部８が金属部材１側に圧入されることにより、樹脂部材２への過度の熱影響を及ぼさないことから、樹脂部材２が破損せずに接合することができる。 In addition, since the probe portion 8 is press-fitted to the metal member 1 side, the resin member 2 can be joined without being damaged because the resin member 2 is not excessively affected by heat.

　本実施形態では、溶融した樹脂部材２側に塑性変形した金属薄板４が流れ込むように接合されているので、樹脂部材２が硬化した後は確実に接合されると共に、樹脂部材２が破壊されない接合強度が高く、見映えのよい接合構造が得られる。 In this embodiment, the plastically deformed thin metal plate 4 is joined so as to flow into the melted resin member 2 side. A joint structure with high strength and good appearance can be obtained.

　比較例１
　ショルダ径１５ｍｍ、プローブ径６ｍｍ、プローブ長さ２．５ｍｍ、回転数１０００ｒｐｍ、接合速度１００ｍｍ／ｍｉｎ、侵入深さ２．６ｍｍ、回転ツール７の中心位置を突き合わせ界面３として接合を行った。その結果を図９に示す。この比較例に係る接合構造１１０では、図９の表面写真には表面溝状欠陥１１２が存在する。このため、最大継手引張力が大幅に低下した。これは、プローブ部８が樹脂部材２と直接接触し、樹脂部材２が撹拌効果により金属薄板４の表面に巻き込まれることにより、接合構造１１０に悪影響を及ぼすことが分かった。 Comparative example 1
A shoulder diameter of 15 mm, a probe diameter of 6 mm, a probe length of 2.5 mm, a rotating speed of 1000 rpm, a welding speed of 100 mm/min, a penetration depth of 2.6 mm, and welding were performed using the center position of the rotary tool 7 as the butt interface 3 . The results are shown in FIG. In the joint structure 110 according to this comparative example, surface groove-like defects 112 exist in the surface photograph of FIG. As a result, the maximum joint tensile force was greatly reduced. It has been found that this has an adverse effect on the joint structure 110 because the probe portion 8 is in direct contact with the resin member 2 and the resin member 2 is caught on the surface of the thin metal plate 4 due to the stirring effect.

　比較例２
　ショルダ径１５ｍｍ、プローブ径６ｍｍ、プローブ長さ２．５ｍｍ、回転数１２５０ｒｐｍ、接合速度５００ｍｍ／ｍｉｎ、侵入深さ２．６ｍｍ、回転ツール７の中心位置を実施例１及び２と同じく突き合わせ界面３から金属部材側に３ｍｍオフセットさせて接合を行った。その結果を図１０及び図１１に示す。この比較例に係る接合構造１１０では、図１０の表面写真には表面溝状欠陥１１２が存在し、図１１の断面写真には内部欠陥１１３が存在する。このため、最大継手引張力が大幅に低下した。接合速度が速すぎることで入熱が小さくなってしまうこと、及び侵入深さの影響により金属部材１と金属薄板４が同時に撹拌されることにより欠陥が生じやすくなることにより、接合構造１１０に悪影響を及ぼすことが分かった。 Comparative example 2
Shoulder diameter 15 mm, probe diameter 6 mm, probe length 2.5 mm, number of rotations 1250 rpm, welding speed 500 mm/min, penetration depth 2.6 mm Bonding was performed with an offset of 3 mm toward the metal member. The results are shown in FIGS. 10 and 11. FIG. In the joint structure 110 according to this comparative example, a surface groove-like defect 112 exists in the surface photograph of FIG. 10, and an internal defect 113 exists in the cross-sectional photograph of FIG. As a result, the maximum joint tensile force was greatly reduced. The joining structure 110 is adversely affected because the joining speed is too high and the heat input becomes small, and the simultaneous stirring of the metal member 1 and the thin metal plate 4 due to the effect of the penetration depth makes defects more likely to occur. was found to affect

　また、プローブ部８の先面が金属薄板４と金属部材１との界面よりも金属薄板４側に０．１５ｍｍ以下から、金属薄板４と金属部材１との界面よりも金属部材１側に０．３０ｍｍ以下までの範囲に侵入した状態で、金属部材１、樹脂部材２、及び金属薄板４が互いに接合されるのが望ましい。 Further, the front surface of the probe portion 8 is 0.15 mm or less on the side of the thin metal plate 4 from the interface between the thin metal plate 4 and the metal member 1 and 0.15 mm or less on the side of the metal member 1 from the interface between the thin metal plate 4 and the metal member 1 . It is desirable that the metal member 1, the resin member 2, and the thin metal plate 4 are joined to each other in a state in which they are intruded within a range of 0.30 mm or less.

　つまり、プローブ部８の先面が金属薄板４と金属部材１との界面よりも金属薄板４側に０．１５ｍｍよりも離れて浅く侵入した場合には、金属薄板４の撹拌が不足することにより十分な接合強度が得られず、金属薄板４と金属部材１との界面よりも金属部材１側に０．３０ｍｍよりも深く侵入した場合には、金属部材１と金属薄板４が同時に撹拌されることにより欠陥が生じやすくなるおそれがあることから、プローブ部８の先面が適度な位置に侵入した状態であると、適度に金属部材及び樹脂部材を摩擦撹拌接合できる。 That is, when the front surface of the probe portion 8 penetrates into the thin metal plate 4 more than 0.15 mm away from the interface between the thin metal plate 4 and the metal member 1 and shallowly, the stirring of the thin metal plate 4 is insufficient. When sufficient bonding strength cannot be obtained and the metal member 1 side penetrates deeper than 0.30 mm from the interface between the metal thin plate 4 and the metal member 1, the metal member 1 and the metal thin plate 4 are stirred at the same time. Therefore, if the front surface of the probe portion 8 is in a suitable position, the metal member and the resin member can be properly friction-stir-welded.

　本実施形態では、突き合わせ界面３を超えないようにしながらできるだけ突き合わせ界面３に近付けることで、樹脂面の破壊を防ぎつつも、必要な接合強度が得られる。 In this embodiment, it is possible to obtain the necessary bonding strength while preventing breakage of the resin surface by bringing it as close to the butt interface 3 as possible while not exceeding the butt interface 3 .

　また、金属部材１及び樹脂部材２の板厚よりも薄い金属薄板４を用いるので、樹脂部材２の破壊を防ぎながらも適度に金属部材１及び樹脂部材２を摩擦撹拌できる。 Also, since the thin metal plate 4 thinner than the plate thickness of the metal member 1 and the resin member 2 is used, the metal member 1 and the resin member 2 can be moderately friction-stirred while preventing breakage of the resin member 2 .

　さらに、樹脂部材２は熱可塑性樹脂であるため、接合工程において、樹脂部材２の少なくとも一部が溶融し、塑性変形した金属薄板４が金属部材１と接合されると共に、樹脂部材２側に流れ込んだ後、硬化して接合される。 Furthermore, since the resin member 2 is made of a thermoplastic resin, at least part of the resin member 2 is melted in the joining process, and the plastically deformed thin metal plate 4 is joined to the metal member 1 and flows into the resin member 2 side. It is then cured and joined.

　以上説明したように、本発明によれば、金属部材１と樹脂部材２の側面を突き合わせて接合しても、樹脂面が摩擦熱や押圧力によって破壊されるのを防ぎながら必要な接合強度が得られる。また、接合部分の一方側が平坦で見映えがよく接合強度の高い接合構造が得られる。 As described above, according to the present invention, even if the side surfaces of the metal member 1 and the resin member 2 are butted and joined together, the necessary joint strength is achieved while preventing the resin surfaces from being destroyed by frictional heat and pressing force. can get. In addition, one side of the joint portion is flat, and a joint structure with good appearance and high joint strength can be obtained.

　なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。 It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or uses.

　　　　　　１　　　金属部材
　　　　　　２　　　樹脂部材
　　　　　　３　　　突き合わせ界面
　　　　　　４　　　金属薄板
　　　　　　５　　　上面
　　　　　　６　　　下面
　　　　　　７　　　回転ツール
　　　　　　８　　　プローブ部
　　　　　　９　　　ショルダ部
　　　　　１０　　　接合構造
　　　　　１１　　　裏当て金
　　　　　１２　　　接合界面
　　　　１１０　　　接合構造
　　　　１１２　　　表面溝状欠陥
　　　　１１３　　　内部欠陥 REFERENCE SIGNS LIST 1 metal member 2 resin member 3 butt interface 4 thin metal plate 5 upper surface 6 lower surface 7 rotary tool 8 probe portion 9 shoulder portion 10 joint structure 11 backing metal 12 joint interface 110 joint structure 112 surface groove defect 113 internal defect

Claims

　板厚の同じ金属部材及び樹脂部材の側面同士を突き合わせ界面において突き合わせる突き合わせ工程と、
　突き合わせた上記金属部材及び上記樹脂部材により形成された平坦な一方の面に金属薄板を重ね合わせる重ね合わせ工程と、
　上記金属薄板の表面側から上記突き合わせ界面よりも上記金属部材側にずらして回転ツールのプローブ部が配置されるようにして、回転する回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合される接合工程とを含む
ことを特徴とする金属部材と樹脂部材の接合方法。 A butting step of butting side surfaces of a metal member and a resin member having the same plate thickness with each other at a butting interface;
a superposing step of superimposing a thin metal plate on one flat surface formed by the butted metal member and the resin member;
By displacing the probe portion of the rotary tool from the surface side of the thin metal plate to the metal member side of the abutting interface, the rotating rotary tool is press-fitted and moved along the abutting interface. , and a joining step of joining the metal member, the resin member, and the thin metal plate to each other.
　請求項１に記載の金属部材と樹脂部材の接合方法であって、
　上記プローブ部の先端外周が、上記金属部材と上記樹脂部材の突き合わせ界面の近傍で且つ超えないように上記回転ツールを上記突き合わせ界面からずらした状態で、上記回転ツールを圧入して上記突き合わせ界面に沿って移動する
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to claim 1,
In a state in which the rotating tool is shifted from the abutting interface so that the outer periphery of the tip of the probe portion is in the vicinity of the abutting interface between the metal member and the resin member but does not exceed the abutting interface, the rotating tool is press-fitted to the abutting interface. A method for joining a metal member and a resin member, characterized in that the metal member and the resin member are moved along.
　請求項１又は２に記載の金属部材と樹脂部材の接合方法であって、
　上記プローブ部の先端外周が、上記金属部材と上記樹脂部材の突き合わせ界面と一致するように上記回転ツールを上記突き合わせ界面からずらした状態で、上記回転ツールを圧入して上記突き合わせ界面に沿って移動する
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to claim 1 or 2,
In a state in which the rotating tool is shifted from the butting interface so that the outer periphery of the tip of the probe portion coincides with the butting interface between the metal member and the resin member, the rotating tool is press-fitted and moved along the butting interface. A method for joining a metal member and a resin member, characterized by:
　請求項１から３のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記接合工程において、上記突き合わせ界面の裏側から裏当て金の平坦面を押し当てて支持した状態で上記回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、
　上記接合工程の後の上記金属部材と上記樹脂部材において、少なくとも上記金属薄板の反対側を平坦とする
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 3,
In the joining step, the rotary tool is press-fitted and moved along the butt interface while the flat surface of the backing metal is pressed against and supported from the back side of the butt interface.
A method for joining a metal member and a resin member, characterized in that, in the metal member and the resin member after the joining step, at least a side opposite to the thin metal plate is flattened.
　請求項１から４のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記金属部材及び上記樹脂部材の板厚よりも薄い上記金属薄板を用いる
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 4,
A method for joining a metal member and a resin member, wherein the thin metal plate is thinner than the thickness of the metal member and the resin member.
　請求項１から５のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記樹脂部材は、熱可塑性樹脂であり、上記接合工程において、該樹脂部材の少なくとも一部が溶融し、塑性変形した上記金属薄板が上記金属部材と接合されると共に、上記樹脂部材側に流れ込んだ後、硬化して接合される
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 5,
The resin member is a thermoplastic resin, and at least part of the resin member is melted in the joining step, and the plastically deformed thin metal plate is joined to the metal member and flows into the resin member side. A method for joining a metal member and a resin member, characterized in that the joining is performed after curing.
　請求項１から６のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記接合工程において、上記プローブ部の先面が上記金属薄板と上記金属部材との界面よりも上記金属薄板側に０．１５ｍｍ以下から、上記金属薄板と上記金属部材との上記界面よりも上記金属部材側に０．３０ｍｍ以下までの範囲に侵入した状態で、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合される
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 6,
In the bonding step, the front surface of the probe portion is located 0.15 mm or less on the thin metal plate side of the interface between the thin metal plate and the metal member, and the metal tip is positioned closer to the thin metal plate than the interface between the thin metal plate and the metal member. A method for joining a metal member and a resin member, wherein the metal member, the resin member, and the thin metal plate are joined to each other in a state in which the metal member and the resin member are intruded into a range of 0.30 mm or less.
　請求項１から７のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記プローブ部の長さが、上記金属薄板の厚さと同じである
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 7,
A method for joining a metal member and a resin member, wherein the length of the probe portion is the same as the thickness of the thin metal plate.
　請求項１から８のいずれか１つに記載の金属部材と樹脂部材の接合方法であって、
　上記接合工程において、上記プローブ部の回転数が１５００ｒｐｍ以上２０００ｒｐｍ以下で、接合速度が１００ｍｍ／ｍｉｎ以上３００ｍｍ／ｍｉｎ以下である
ことを特徴とする金属部材と樹脂部材の接合方法。 A method for joining a metal member and a resin member according to any one of claims 1 to 8,
A method for joining a metal member and a resin member, wherein in the joining step, the rotational speed of the probe portion is 1500 rpm or more and 2000 rpm or less, and the joining speed is 100 mm/min or more and 300 mm/min or less.
　板厚の同じ金属部材及び樹脂部材の側面同士を突き合わせ界面において突き合わせ、該金属部材及び樹脂部材により形成された平坦な一方の面に金属薄板を重ね合わせた状態で金属薄板の表面側から、回転する回転ツールを圧入して上記突き合わせ界面に沿って移動することにより、上記金属部材、上記樹脂部材、及び上記金属薄板が互いに接合された金属部材と樹脂部材の接合構造であって、
　上記回転ツールにより塑性変形した上記金属薄板が、少なくとも一部が溶融した上記樹脂部材側に流れ込んで接合されており、
　上記金属薄板が上記樹脂部材側に流れ込む量は、該回転ツールにより塑性変形した上記金属部材が上記樹脂部材側に流れ込む量よりも多い
ことを特徴とする金属部材と樹脂部材の接合構造。 The side surfaces of a metal member and a resin member having the same plate thickness are butted against each other at the interface, and in a state where the metal thin plate is superimposed on one flat surface formed by the metal member and the resin member, the metal thin plate is rotated from the surface side. A joint structure of a metal member and a resin member in which the metal member, the resin member, and the thin metal plate are joined to each other by press-fitting a rotating tool and moving along the abutting interface,
The thin metal plate plastically deformed by the rotating tool flows into and is joined to the resin member that is at least partially melted,
A joining structure of a metal member and a resin member, wherein an amount of the thin metal plate flowing into the resin member is larger than an amount of the metal member plastically deformed by the rotary tool flowing into the resin member.
　請求項１０に記載の金属部材と樹脂部材の接合構造であって、
　上記金属部材と上記樹脂部材との接合部分は、少なくとも上記金属薄板の反対側が平坦である
ことを特徴とする金属部材と樹脂部材の接合構造。 A joint structure of a metal member and a resin member according to claim 10,
A joining structure of a metal member and a resin member, wherein at least a side opposite to the thin metal plate is flat in a joining portion between the metal member and the resin member.