JP7342894B2 - Method for joining metal parts and method for manufacturing joined parts - Google Patents

Method for joining metal parts and method for manufacturing joined parts Download PDF

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JP7342894B2
JP7342894B2 JP2021012169A JP2021012169A JP7342894B2 JP 7342894 B2 JP7342894 B2 JP 7342894B2 JP 2021012169 A JP2021012169 A JP 2021012169A JP 2021012169 A JP2021012169 A JP 2021012169A JP 7342894 B2 JP7342894 B2 JP 7342894B2
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caulking
concave shape
plate
burring
metal
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JP2022115536A (en
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隼佑 飛田
栄治 飯塚
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JFE Steel Corp
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Description

本発明は、2以上の金属部品の板状部の部分を、バーリング成形を用いたかしめ加工により接合する接合方法、それを適用した接合部品の製造方法及び金属部品の接合構造に関する技術である。 The present invention relates to a joining method for joining plate-like parts of two or more metal parts by caulking using burring, a method for manufacturing joined parts using the method, and a technology for joining structures of metal parts.

近年、自動車車体の衝突安全性向上と軽量化を両立させるため、車体部品の異種材接合技術の開発が進んでいる。一般的に自動車プレス部品の接合として、スポット溶接等の接合方法が用いられるが、異種材の接合は金属間化合物などの課題がある。また、超ハイテン材においてもLME等の溶接課題があり、溶接以外の接合方法が求められている。 In recent years, in order to both improve the collision safety and reduce the weight of automobile bodies, the development of technologies for joining dissimilar materials for car body parts has been progressing. Generally, joining methods such as spot welding are used to join pressed automobile parts, but there are problems with joining dissimilar materials, such as intermetallic compounds. Furthermore, even with ultra-high tensile strength materials, there are welding issues such as LME, and joining methods other than welding are required.

上記スポット溶接の代替として、摩擦撹拌接合(FSW)やセルフピアシングリベット、メカニカルクリンチングといった接合方法の開発が進んでいる。しかし、自動車部品の量産にこれらの技術を適用する場合、摩擦撹拌接合やセルフピアシングリベットでは設備投資や追加部品のコストアップ、メカニカルクリンチングでは接合強度の低下といった課題が挙げられる。 As an alternative to the spot welding described above, joining methods such as friction stir welding (FSW), self-piercing rivets, and mechanical clinching are being developed. However, when applying these technologies to the mass production of automobile parts, there are issues such as increased capital investment and additional parts costs with friction stir welding and self-piercing rivets, and a decrease in joint strength with mechanical clinching.

ここで、特許文献1には、2枚の金属板の下穴が一致するように重ね合わせ、この状態でバーリング成形を施して筒状のフランジ部を形成した後に、筒状のフランジ部の端部周縁部を他方の金属板を包み込むように拡径方向へ屈曲してかしめることで、端部かしめ部と最外側に位置する金属板の間に、他の金属板を狭着することを記載されている。 Here, in Patent Document 1, after overlapping two metal plates so that the prepared holes match and performing burring molding in this state to form a cylindrical flange part, the ends of the cylindrical flange part are It is described that another metal plate is sandwiched between the end crimped part and the outermost metal plate by bending and caulking the peripheral edge of the part in the direction of diameter expansion so as to wrap around the other metal plate. ing.

また、特許文献2に記載のプレス成形方法は、丸穴を有するベース金属板の上に丸穴を有する被接合金属板を各穴の中心が一致するように重ね合わせ、バーリング加工用のパンチを被接合金属板の丸穴に圧入することで、バーリング部の周縁部がベース金属板の内周部に圧着し、2枚の金属板が接合される、ことが記載されている。 In addition, in the press forming method described in Patent Document 2, a metal plate to be joined having round holes is superimposed on a base metal plate having round holes so that the centers of each hole coincide, and a punch for burring is inserted. It is described that by press-fitting into the round hole of the metal plate to be joined, the peripheral edge of the burring part is pressed against the inner peripheral part of the base metal plate, and the two metal plates are joined.

また、特許文献3には、薄板金属板の重ね合わせ部に突き破りポンチを差し込んで、ガイド孔を形成するとともに、このガイド孔の周縁を裏面に向かって屈曲させるバーリング加工を行った後に、カウンタポンチを薄板金属板の裏面から屈曲縁に押し付けることにより、屈曲縁を重ね合わせ部の裏面に折り返すヘミング加工を行って薄板金属板を重ね合わせ部で結合する方法が記載されている。 Further, in Patent Document 3, a piercing punch is inserted into the overlapping portion of thin metal plates to form a guide hole, and after performing a burring process to bend the periphery of the guide hole toward the back surface, a counter punch is applied. A method is described in which a hemming process is performed in which the bent edge is folded back to the back side of the overlapping portion by pressing the thin metal sheet against the bent edge from the back side of the sheet metal plate, thereby joining the thin metal plates at the overlapping portion.

特開平11-239834号公報Japanese Patent Application Publication No. 11-239834 特開平8-215778号公報Japanese Patent Application Publication No. 8-215778 特開平6-190471号公報Japanese Unexamined Patent Publication No. 6-190471

しかしながら、特許文献1に記載のプレス成形方法では、バーリング加工により立ち上がるフランジ部が円筒状となっており、金属板面に対して垂直方向(板面に対し90度以下の立上り)までしか成形されない。このため、筒状のフランジ部の端部周縁部のかしめ工程で、フランジ部の先端部が潰されてかしめができない可能性がある。また、かしめ工程でフランジ部(バーリング部)の先端板端面が金型に潰されることで、当該金型が傷みやすくなり、量産コストが増加する可能性がある。 However, in the press forming method described in Patent Document 1, the flange part that rises due to burring has a cylindrical shape, and can only be formed in a direction perpendicular to the metal plate surface (rising at an angle of 90 degrees or less with respect to the plate surface). . Therefore, in the process of caulking the peripheral edge of the end of the cylindrical flange, the tip of the flange may be crushed and caulking may not be possible. Furthermore, the end face of the tip plate of the flange portion (burring portion) is crushed by the mold during the caulking process, which may cause the mold to be easily damaged and increase mass production costs.

また、特許文献2に記載のプレス成形方法は、バーリング部の周縁部がベース金属板の端面に圧着する方法であり、この成形方法では、接合する金属板が薄板の場合に、十分な接合強度が得られない可能性がある。 In addition, the press forming method described in Patent Document 2 is a method in which the peripheral edge of the burring part is crimped to the end surface of the base metal plate, and in this forming method, when the metal plates to be joined are thin plates, sufficient bonding strength is obtained. may not be obtained.

更に、特許文献3に記載のプレス成形方法は、1つの工程で穴開けからかしめ加工まで実施することを前提としているため、金型構造が複雑になり、金型の製作費用や補修費などが増加する可能性がある。また、このプレス成形方法では、接合する板材の強度が高いハイテン材の場合には、金型制約上加工できない可能性がある。 Furthermore, since the press forming method described in Patent Document 3 is based on the premise that everything from drilling to caulking is performed in one process, the mold structure becomes complicated and mold manufacturing costs and repair costs increase. There is a possibility that it will increase. Further, with this press forming method, if the plate materials to be joined are high-strength materials with high strength, it may not be possible to process them due to mold restrictions.

本発明は、上記のような点を鑑みてなされたものであり、金型の構造を複雑化することなく、十分な接合強度を確保できる、バーリング加工を用いたかしめ接合の技術を提供することを目的とする。 The present invention has been made in view of the above points, and it is an object of the present invention to provide a caulking joining technique using burring processing that can ensure sufficient joining strength without complicating the structure of the mold. With the goal.

課題解決のため、本発明の一態様は、複数の金属部品の板状部を、バーリング加工で形成されたフランジ部をかしめて接合する金属部品の接合方法であって、上記複数の金属部品から選択した金属部品であるかしめ材の板状部に下穴を形成する工程と、上記かしめ材以外の金属部品であるかしめ相手材の板状部における接合位置に開口を形成する工程と、上記かしめ材の下穴外周にバーリング加工を施して、下穴の周囲を立ち上げてフランジ部を形成するバーリング工程と、上記下穴と上記開口とを合わせてかしめ材の上にかしめ相手材を重ねた状態で、上記フランジ部をかしめて板状部同士を接合するかしめ工程と、を備え、上記バーリング工程の前に、上記かしめ材における上記下穴の外周部となる領域を、上記フランジ部の立ち上げ方向とは反対側に凹の第1の凹形状とする第1凹形状形成工程と、上記バーリング工程の前に、上記かしめ相手材における上記開口の外周部となる領域を、上記かしめ材の上にかしめ相手材を重ねた状態で上記第1の凹形状と同方向に凹で且つ上記第1の凹形状内に位置する第2の凹形状とする第2凹形状形成工程と、を有し、上記第1の凹形状内に、上記フランジ部となる領域が設定され、上記バーリング工程は、上記下穴と上記開口とを合わせてかしめ材の上にかしめ相手材を重ね、且つ上記第1の凹形状内の外周部及び上記第2の凹形状内の外周部を拘束した状態で、下穴の周囲を立ち上げて上記フランジ部を形成し、上記かしめ工程は、上記第2の凹形状内の外周部に向けて、上記フランジ部を曲げ成形することでかしめて、板状部同士を接合する。 In order to solve the problem, one aspect of the present invention is a method for joining metal parts, which joins plate-like parts of a plurality of metal parts by caulking flange parts formed by burring. A step of forming a pilot hole in the plate-like part of the caulking material which is the selected metal part, a process of forming an opening at a joining position in the plate-like part of the caulking partner material which is a metal part other than the caulking material, and the above-mentioned caulking. A burring process is performed on the outer circumference of the prepared hole in the material, and the periphery of the prepared hole is raised to form a flange part, and the material to be caulked is stacked on top of the caulked material by aligning the prepared hole and the above opening. a caulking step of caulking the flange portions to join the plate-like portions together; and before the burring step, an area of the caulking material that will be the outer periphery of the pilot hole is crimped to form the flange portion. Before the first concave shape forming step of forming a first concave shape concave on the opposite side to the lifting direction and the burring step, a region of the mating material to be caulked that will be the outer periphery of the opening is formed of the caulking material. forming a second concave shape that is concave in the same direction as the first concave shape and located within the first concave shape with a mating material to be caulked stacked thereon; A region that will become the flange portion is set within the first concave shape, and the burring step includes aligning the prepared hole and the opening, overlapping the caulking material on the caulking material, and The flange portion is formed by raising the periphery of the pilot hole while the outer periphery of the first concave shape and the second concave shape are restrained, and the caulking step is performed by forming the flange portion of the pilot hole. The flange portions are bent and crimped toward the outer periphery of the shape to join the plate portions together.

本発明の態様によれば、立ち上げたフランジ部の外周の全周に、第1の凹形状の外周部分と第2の凹形状の外周部分からなる凹部が形成されているため、かしめの際に、立ち上げたフランジ部を拡径方向に曲げ成形するだけで、フランジ部がかしめ相手材の上に、より隙間無く巻き付くように変形する。これによって、かしめ加工のプレスによって、よりその巻きつけられた部分をかしめることが可能となる。 According to the aspect of the present invention, the recessed portion consisting of the first recessed outer peripheral portion and the second recessed outer peripheral portion is formed around the entire outer circumference of the raised flange portion. In addition, simply by bending the raised flange portion in the direction of diameter expansion, the flange portion is deformed so as to wrap around the mating material to be caulked with less gaps. This makes it possible to swage the wound portion more easily using a swage press.

このため、本発明の態様によれば、バーリング加工を用いたかしめ接合について、金型形状などの金型構造を複雑化することなく、十分な接合強度を確保できる接合構造体を取得することができる。この結果、本発明の態様によれば、例えば、自動車部品におけるハイテン材を用いたかしめ接合や、異種材接合が可能となり、自動車車体の軽量化に貢献できる。 Therefore, according to an aspect of the present invention, it is possible to obtain a bonded structure that can secure sufficient bonding strength without complicating the mold structure such as the mold shape for caulking bonding using burring processing. can. As a result, according to the aspect of the present invention, for example, caulking and joining of high tensile strength materials and joining of dissimilar materials in automobile parts becomes possible, contributing to weight reduction of automobile bodies.

本発明に基づく実施形態に係る接合方法の工程を説明する図である。It is a figure explaining the process of the joining method concerning an embodiment based on the present invention. 開口工程及び下穴工程を説明する図である。It is a figure explaining an opening process and a prepared hole process. 第1及び第2凹形状形成工程及びバーリング工程を説明する図である。It is a figure explaining the 1st and 2nd concave shape formation process and burring process. 第1の凹形状の部分とフランジ部となる領域の関係を示す平面図である。FIG. 3 is a plan view showing the relationship between a first concave portion and a region that becomes a flange portion. かしめ工程を説明する図である。It is a figure explaining a caulking process. 第1の凹形状の形成の別の例を説明する図である。It is a figure explaining another example of formation of a 1st concave shape. 従来のかしめ接合の場合を説明する図である。It is a figure explaining the case of the conventional caulking joint. 従来のかしめ接合の場合を説明する図である。It is a figure explaining the case of the conventional caulking joint.

次に、本発明の実施形態について説明する。
本実施形態は、複数の金属部品の板状部を重ねて、バーリング加工で形成されたフランジ部をかしめて接合する金属部品の接合技術に関する。すなわち、本実施形態は、バーリング加工を用いたかしめ接合の技術に関するものである。
Next, embodiments of the present invention will be described.
The present embodiment relates to a joining technique for metal parts, in which plate-like parts of a plurality of metal parts are overlapped and joined by caulking flange parts formed by burring. That is, the present embodiment relates to a caulking joining technique using burring.

ここで、「金属部品の板状部」と記載しているのは、少なくともかしめ接合される部分が板状となっていればよく、金属部品として、かしめ接合される箇所以外に板形状以外の部分を有していても良いことを表している。 Here, the term "plate-shaped part of metal parts" means that at least the part to be caulked is plate-shaped; It means that it may have a part.

本実施形態では、金属部品全体が板材からなる場合を例にして説明する。このため、金属部品及び金属部品の板状部をともに、金属板とも呼んで説明する。すなわち、本実施形態の例では、複数の金属板をかしめ接合する場合とする。また、バーリング加工を施す金属板をかしめ材と呼び、かしめ材以外の金属板をかしめ相手材と呼ぶ。 In this embodiment, a case will be described in which the entire metal component is made of a plate material. Therefore, both the metal component and the plate-shaped portion of the metal component will be referred to as a metal plate in the following description. That is, in the example of this embodiment, a plurality of metal plates are caulked and joined. Further, the metal plate to which burring is applied is called a caulking material, and the metal plate other than the caulking material is called a caulking mating material.

本実施形態の金属部品の接合方法は、図1に示すように、開口工程100、下穴工程101、バーリング工程103、かしめ工程104を備える。更に、本実施形態の接合方法は、第1凹形状形成工程102A、及び第2凹形状形成工程102Bを備える。各工程は、プレス加工で行われる。 As shown in FIG. 1, the method for joining metal parts of this embodiment includes an opening step 100, a prepared hole step 101, a burring step 103, and a caulking step 104. Furthermore, the bonding method of this embodiment includes a first concave shape forming step 102A and a second concave shape forming step 102B. Each step is performed by press working.

開口工程100は、かしめ相手材1の板状部における接合位置に開口1aを形成する工程である。
下穴工程101は、かしめ材2の板状部(接合部)に下穴2aを形成する工程である。
第1凹形状形成工程102Aは、バーリング工程103の前に、かしめ材2における下穴2aの外周部となる領域を、立ち上げ方向とは反対側に凹の第1の凹形状3とする成形工程である。ここで、第1の凹形状3内に、具体的には第1の凹形状3の底面部内にフランジ部2Aとなる領域ARAが設定される。
第2凹形状形成工程102Bは、バーリング工程103の前に、かしめ相手材1における開口1Aの外周部となる領域を、かしめ材2の上にかしめ相手材1を重ねた状態で第1の凹形状3と同方向に凹で且つ第1の凹形状内に位置する第2の凹形状4とする工程である。
The opening step 100 is a step of forming an opening 1a at the joining position in the plate-shaped portion of the mating material 1 to be caulked.
The pilot hole step 101 is a step of forming a pilot hole 2a in the plate-shaped portion (joint portion) of the caulking material 2.
In the first concave shape forming step 102A, before the burring step 103, a region of the caulking material 2 that will become the outer periphery of the pilot hole 2a is formed into a first concave shape 3 that is concave on the opposite side to the rising direction. It is a process. Here, an area ARA that will become the flange portion 2A is set within the first concave shape 3, specifically within the bottom surface portion of the first concave shape 3.
In the second concave shape forming step 102B, before the burring step 103, a region of the mating material 1 to be caulked that will become the outer periphery of the opening 1A is formed into a first concave shape while the mating material 1 to be caulked is stacked on the caulking material 2. This is a step of forming a second concave shape 4 that is concave in the same direction as the shape 3 and located within the first concave shape.

バーリング工程103は、かしめ材2の下穴2aの外周にバーリング加工を施して、下穴2aの周囲を立ち上げてフランジ部2A(立上り部)を形成する工程である。本実施形態のバーリング工程103は、第1凹形状形成工程102A及び第2凹形状形成工程102Bの後に実行され、下穴2aと開口1aとを合わせてかしめ材2の上にかしめ相手材1を重ね、且つ第1の凹形状内3の外周部及び第2の凹形状4内の外周部を拘束した状態で、下穴2aの周囲を立ち上げて上記フランジ部2Aを形成する。 The burring step 103 is a step in which the outer periphery of the pilot hole 2a of the caulking material 2 is burred, and the periphery of the pilot hole 2a is raised to form a flange portion 2A (rising portion). The burring step 103 of the present embodiment is performed after the first concave shape forming step 102A and the second concave shape forming step 102B, and is performed by aligning the prepared hole 2a and the opening 1a and attaching the mating material 1 to be caulked onto the caulking material 2. While overlapping and restraining the outer periphery of the first concave shape 3 and the second concave shape 4, the flange portion 2A is formed by raising the periphery of the prepared hole 2a.

かしめ工程104は、かしめ相手材1の開口1aにフランジ部2Aを通して複数の板状部を重ねた状態として、フランジ部2Aをかしめて、複数の金属板同士(板状部同士)を接合する工程である。本実施形態のかしめ工程では、第2の凹形状4内の外周部に向けて、フランジ部2Aを曲げ成形することでかしめて、板状部同士を接合する。 The caulking step 104 is a process of passing the flange portion 2A through the opening 1a of the mating material 1 to be caulked and stacking the plurality of plate-like portions, and then caulking the flange portion 2A to join the plurality of metal plates (plate-like portions) together. It is. In the caulking step of the present embodiment, the flange portion 2A is bent and formed toward the outer circumferential portion within the second concave shape 4, thereby caulking the plate-like portions.

ここで、バーリング工程103の前に、開口工程100、下穴工程101、第1凹形状形成工程102A、及び第2凹形状形成工程102Bが行われるが、開口工程100、下穴工程101、第1凹形状形成工程102A、及び第2凹形状形成工程102Bの実行順序には特に限定はない。 Here, before the burring step 103, an opening step 100, a prepared hole step 101, a first concave shape forming step 102A, and a second concave shape forming step 102B are performed. There is no particular limitation on the order of execution of the first concave shape forming step 102A and the second concave shape forming step 102B.

また、接合される金属板の引張強度について、特に限定はない。例えば、接合される金属板のうち、少なくともかしめ相手材1は、引張強度が270MPa以上の鋼板やアルミ合金材などの金属板から構成されてもよい。かしめ材2も、引張強度が270MPa以上の鋼板やアルミ合金材などの金属板であってもよい。異種材料同士の接合の場合には、かしめ材2の引張強度が、かしめ相手材1の引用強度よりも大きくなるように設定することが好ましい。
また、かしめ相手材1は、2枚以上であってもよい。
Moreover, there is no particular limitation on the tensile strength of the metal plates to be joined. For example, among the metal plates to be joined, at least the caulking mating material 1 may be made of a metal plate such as a steel plate or an aluminum alloy material having a tensile strength of 270 MPa or more. The caulking material 2 may also be a metal plate such as a steel plate or an aluminum alloy material having a tensile strength of 270 MPa or more. In the case of joining dissimilar materials, it is preferable to set the tensile strength of the caulking material 2 to be greater than the quoted strength of the material 1 to be caulked.
Further, the number of caulking mating materials 1 may be two or more.

次に、金属部品の具体的な接合方法の例を、図面を参照して説明する。
以下の例では、かしめ材2及びかしめ相手材1を構成する金属板がそれぞれ1枚ずつの場合とする。かしめ相手材1が2枚以上であってもよい。
Next, a specific example of a method for joining metal parts will be described with reference to the drawings.
In the following example, it is assumed that the caulking material 2 and the caulking mating material 1 each include one metal plate. There may be two or more caulking mating materials 1.

<開口工程100、下穴工程101>
開口工程100及び下穴工程101は、図2に示すように、かしめ相手材1若しくはかしめ材2を構成する金属板を厚さ方向でダイ10と板押え11とで拘束した状態で、穴形状と同じ断面形状のパンチ12を板厚方向に下降することで板を打ち抜き、金属板1,2に穴1a、2aを形成する。
<Opening process 100, prepared hole process 101>
As shown in FIG. 2, in the opening process 100 and the prepared hole process 101, the metal plate constituting the caulking mating material 1 or the caulking material 2 is restrained in the thickness direction by the die 10 and the plate holder 11, and the hole shape is The punch 12 having the same cross-sectional shape is moved downward in the thickness direction to punch out the plate and form holes 1a and 2a in the metal plates 1 and 2.

なお、開口1aの径は、かしめ材2に設ける下穴2aの径よりも大きい。具体的には、かしめ接合するためにかしめ相手材1とかしめ材2を重ねた際に、開口1aの開口端は、フランジ部を形成する領域の外縁と同じか、よりも外側に位置する。 Note that the diameter of the opening 1a is larger than the diameter of the prepared hole 2a provided in the caulking material 2. Specifically, when the caulking mating material 1 and the caulking material 2 are overlapped for caulking and joining, the open end of the opening 1a is located at the same level as the outer edge of the region forming the flange portion or on the outer side.

<第1凹形状形成工程102A、第2凹形状形成工程102B、及びバーリング工程103>
本実施形態では、図3に示すように、1つのプレス金型によって、第1凹形状形成工程102A、第2凹形状形成工程102B、及びバーリング工程103を一連のプレス加工として実行する場合を例に挙げる。第1凹形状形成工程102A、第2凹形状形成工程102B、及びバーリング工程103を個別のプレス工程としてもよい。
<First concave shape forming process 102A, second concave shape forming process 102B, and burring process 103>
In this embodiment, as shown in FIG. 3, an example is given in which the first concave shape forming process 102A, the second concave shape forming process 102B, and the burring process 103 are performed as a series of press processes using one press mold. Listed below. The first recessed shape forming step 102A, the second recessed shape forming step 102B, and the burring step 103 may be performed as separate pressing steps.

まず、図3(a)のように、下穴2aと開口1aが同心となるようにして、かしめ材2の上にかしめ相手材1を重ねた状態とし、図3(a)→(b)のように、かしめ材2とかしめ相手材1とを同時に、かしめ相手材1における開口1aの外周、及びかしめ材2における下穴2aの外周であってフランジ部2Aとなる領域ARA(図4参照)の外側を、下型13と上型14で上下からプレスする。 First, as shown in FIG. 3(a), the material 1 to be caulked is stacked on the caulking material 2 so that the pilot hole 2a and the opening 1a are concentric. As shown in FIG. ) is pressed from above and below using a lower mold 13 and an upper mold 14.

このとき、下型13の上面には、第1の凹形状3の形成位置に、第1の凹形状3に倣った形状の凹部13aが内周側に形成されている。また、上型14の下面には、第1の凹形状3の形成位置に、第1の凹形状3に倣った形状の張出部14aが内周面側に形成されている。すなわち、凹部13aと張出部14aがプレス方向で対向している。 At this time, on the upper surface of the lower mold 13, a recess 13a having a shape that follows the first recess 3 is formed on the inner peripheral side at the position where the first recess 3 is formed. Further, on the lower surface of the upper die 14, at the position where the first concave shape 3 is formed, a projecting portion 14a having a shape that follows the first concave shape 3 is formed on the inner peripheral surface side. That is, the recess 13a and the overhang 14a face each other in the pressing direction.

このため、図3(a)→(b)のように、かしめ材2を下型13と上型14で上下からプレスすることで、下穴2aの外周に第1の凹形状3が形成される。第1の凹形状3は、図4に示すように、底面にフランジ形成領域ARAが配置されるだけの大きさの外周輪郭形状を有する。すなわち、第1の凹形状3内に、フランジ部2Aとなる領域ARAを設定することが可能な大きさに、当該第1の凹形状3が設定されている。 Therefore, as shown in FIGS. 3(a) and 3(b), by pressing the caulking material 2 from above and below with the lower die 13 and the upper die 14, a first concave shape 3 is formed on the outer periphery of the prepared hole 2a. Ru. As shown in FIG. 4, the first concave shape 3 has an outer peripheral contour shape large enough to accommodate the flange forming area ARA on the bottom surface. That is, the first concave shape 3 is set to a size that allows setting the area ARA that becomes the flange portion 2A within the first concave shape 3.

また、第1の凹形状3の形成と同時に、かしめ相手材1の開口1aの外周部に第2の凹形状4が形成される。本実施形態では、第2の凹形状4の部分の下面が、第1の凹形状3の上面に倣った形状となっている。 Furthermore, simultaneously with the formation of the first concave shape 3, a second concave shape 4 is formed on the outer periphery of the opening 1a of the caulking mating material 1. In this embodiment, the lower surface of the second concave shape 4 has a shape that follows the upper surface of the first concave shape 3.

ここで、下穴2aと開口1aが同心となるようにして、かしめ材2の上にかしめ相手材1を重ねた状態おいて、開口1aの開口端は、フランジ部2Aを形成する領域ARAの外縁と同じか、それよりも外側に位置する。このため、上記形成された第2の凹形状4は、第1の凹形状3の外周部3aの凹部分と対向する部分だけの形状となり、第2の凹形状4の板厚方向の断面が、図3(b)(c)のように、凹の底部分がないか殆ど無く、板厚方向に対し傾斜した傾斜部分が主体となっている。
この図3(a)→(b)の処理が、第1凹形状形成工程102A及び第2凹形状形成工程102Bを構成する。
Here, with the prepared hole 2a and the opening 1a being concentric, and the mating material 1 to be caulked being stacked on the caulking material 2, the open end of the opening 1a is located in the area ARA forming the flange portion 2A. Located at or outside the outer edge. Therefore, the second concave shape 4 formed above has a shape only in the portion facing the concave portion of the outer peripheral portion 3a of the first concave shape 3, and the cross section of the second concave shape 4 in the plate thickness direction is , as shown in FIGS. 3(b) and 3(c), there is no or almost no bottom part of the recess, and the main part is an inclined part inclined with respect to the plate thickness direction.
The process shown in FIGS. 3A and 3B constitutes a first concave shape forming step 102A and a second concave shape forming step 102B.

続いて、図3(b)のように、上型14と下型13でかしめ材2を拘束した状態で、下穴2aに対して下側(立上り方向とは反対側)から、図3の(b)→(c)のように、バーリング用のパンチ15を通過させることで、下穴2a外周を立ち上げてフランジ部2Aを形成する。
この図3の(b)→(c)の処理が、バーリング工程を構成する。
Next, as shown in FIG. 3(b), with the caulking material 2 restrained by the upper die 14 and the lower die 13, the caulking material 2 is inserted into the prepared hole 2a from below (opposite to the rising direction) as shown in FIG. As shown in (b)→(c), by passing the burring punch 15, the outer periphery of the prepared hole 2a is raised to form the flange portion 2A.
The process from (b) to (c) in FIG. 3 constitutes the burring process.

このバーリング工程103では、フランジ部2Aの外周に位置した第1の凹形状3の外周部分、及び第2の凹形状4の外周部分は、上型14と下型13で拘束されているため、フランジ部2Aの成形に影響することなく、若しくは影響が殆どないので、フランジ部2Aの外周にリング状(ドーナツ状)の凹状態として残存している。 In this burring step 103, since the outer circumferential portion of the first concave shape 3 and the outer circumferential portion of the second concave shape 4 located on the outer circumference of the flange portion 2A are restrained by the upper die 14 and the lower die 13, Since it does not affect the formation of the flange portion 2A, or has almost no effect, it remains as a ring-shaped (doughnut-shaped) recess on the outer periphery of the flange portion 2A.

<かしめ工程104>
かしめ工程104は、バーリング工程103の後に実行される。
かしめ工程104では、まず、図3(c)で形成した、下穴2aと開口1aを同心に、かしめ材2の上にかしめ相手材1を重ねた状態のまま、ダイ16でかしめ材2及びかしめ相手材1を支持する。ダイ16は、下型13をそのまま使用すればよい。
<Caulking process 104>
The caulking process 104 is performed after the burring process 103.
In the caulking step 104, first, the caulking material 2 and the caulking material 1 are stacked on the caulking material 2 with the die 16, with the prepared hole 2a and the opening 1a formed in FIG. The caulking mating material 1 is supported. For the die 16, the lower die 13 may be used as is.

次に、かしめ工程104は、図5(a)→(b)のように、円錐部17Aを有するパンチ17をフランジ部2A内に同軸に下降して、円錐部17Aの傾斜面によって、フランジ部2Aを拡径することで、当該フランジ部2Aを、かしめ相手材1の第2の凹形状4の傾斜した凹部分に向けて曲げ加工する。これによって、かしめ材2のフランジ部2Aが、かしめ相手材1の第2の凹形状4の傾斜した凹部分に巻き付つくように拡径方向(負角の方向)に曲がる。更に、続くパンチ17の下降で、円錐部17Aの面によって決め押しされて、かしめ接合が実行される。 Next, in the caulking step 104, as shown in FIGS. 5(a) → (b), the punch 17 having the conical portion 17A is lowered coaxially into the flange portion 2A, and the flange portion is moved by the inclined surface of the conical portion 17A. By enlarging the diameter of 2A, the flange portion 2A is bent toward the inclined concave portion of the second concave shape 4 of the mating material 1 to be caulked. As a result, the flange portion 2A of the caulking material 2 bends in the diametrically expanding direction (negative angle direction) so as to wrap around the inclined concave portion of the second concave shape 4 of the caulking mating material 1. Furthermore, as the punch 17 continues to descend, it is pressed decisively by the surface of the conical portion 17A, and caulking is performed.

(変形例)
(1)上記実施形態では、かしめ材2について、下穴2aを形成した後に、第1の凹形状3の成形を行う場合を例示したが、これに限定されない。例えば、図6(a)→(b)に示すように、第1の凹形状3に倣った凹部を有する下型18と、第1の凹形状3に倣った張出部を有する上型19で、下穴を開口していないかしめ材2をプレスして第1の凹形状3を形成した後に、図6(c)→(d)のように、上型21と下型20で拘束し、第1の凹形状3の中央部を、抜きパンチ22で板を打ち抜いて下穴2aを形成するようにしても良い。この場合、第1の凹形状3の形成の際に、平底の伸びフランジ成形を無視することができ、伸びフランジ割れリスクを低減することができる。
(Modified example)
(1) In the above embodiment, the case where the first concave shape 3 is formed after forming the prepared hole 2a in the caulking material 2 is illustrated, but the present invention is not limited to this. For example, as shown in FIGS. 6(a)→(b), a lower mold 18 having a concave portion following the first concave shape 3, and an upper mold 19 having an overhang portion following the first concave shape 3. After pressing the caulking material 2 without opening the pilot hole to form the first concave shape 3, it is restrained by the upper mold 21 and the lower mold 20 as shown in FIGS. 6(c) to 6(d). Alternatively, the center portion of the first concave shape 3 may be punched out of the plate using the punch 22 to form the pilot hole 2a. In this case, when forming the first concave shape 3, stretch flange forming of the flat bottom can be ignored, and the risk of stretch flange cracking can be reduced.

同様に、かしめ相手材1においても、第2の凹形状4をプレス加工で形成した後に、開口1aを形成するようにしても良い。この場合も、第2の凹形状4の形成の際に、平底の伸びフランジ成形を無視することができ、伸びフランジ割れリスクを低減することができる。
この場合、かしめ材2とかしめ相手材1とを重ねて、一回のプレス加工で、第1の凹形状3と第2の凹形状4を形成するようにしてもよい。
Similarly, in the mating material 1 to be caulked, the opening 1a may be formed after the second concave shape 4 is formed by press working. Also in this case, when forming the second concave shape 4, stretch flange forming of the flat bottom can be ignored, and the risk of stretch flange cracking can be reduced.
In this case, the caulking material 2 and the caulking mating material 1 may be overlapped and the first concave shape 3 and the second concave shape 4 may be formed by one press process.

ここで、開口1aの外周は、平面視でフランジ部2Aとなる領域ARAよりも外側と重なる領域であるため、第2の凹形状4は、平面視でフランジ部2Aとなる領域よりも外側と重なる領域に形成される。
また、かしめ材2とかしめ相手材1とを重ねた際に、第2の凹形状4は、第1の凹形状内に位置する大きさとする。
Here, since the outer periphery of the opening 1a is an area that overlaps with the outside of the area ARA that becomes the flange part 2A in plan view, the second concave shape 4 overlaps with the area outside of the area that becomes the flange part 2A in plan view. Formed in overlapping areas.
Furthermore, when the caulking material 2 and the mating material 1 are overlapped, the second concave shape 4 is sized to be located within the first concave shape.

ここで、上記説明では、下穴2aが丸穴である場合を想定して記載しているが、下穴2aの断面形状が円形でなくても良い。例えば下穴2aの断面形状が、四隅の角部にRや面取りが付与された四角形形状や楕円形状であっても良い。また、必ずしも下穴2aの全周をバーリングする必要はなく、周方向の一部分だけをバーリングしてフランジ部2Aとしても良い。形成したフランジ部2Aをかしめることで、金属部品が接合可能であればよい。例えば、下穴が上記のような四角形状であれば、4隅の角部部分だけをバーリングしたり、4辺の部分だけをバーリングしたりしても良い。 Here, although the above description assumes that the pilot hole 2a is a round hole, the cross-sectional shape of the pilot hole 2a does not have to be circular. For example, the cross-sectional shape of the prepared hole 2a may be a rectangular shape or an elliptical shape with rounded or chamfered corners. Further, it is not necessarily necessary to burr the entire circumference of the prepared hole 2a, and only a portion in the circumferential direction may be burred to form the flange portion 2A. It is sufficient if metal parts can be joined by caulking the formed flange portion 2A. For example, if the pilot hole has a rectangular shape as described above, only the four corners may be burred, or only the four sides may be burred.

(動作その他)
本実施形態のようにバーリング加工前に第1の凹形状3を形成しない場合、すなわち、平板状のかしめ材2に下穴2aを形成し(打抜きにより打抜き穴を加工し)、下穴2aに対してバーリング成形を施して、フランジ部2A(バーリング部)を形成した場合、図7(a)に示すように、フランジ部2Aは、円筒形状となって板面に対して垂直方向に成形される。このため、かしめの工程(図7(b)~(d)参照)にて、フランジ部2Aを上側から押し潰すと、図7(c)のように、フランジ部2Aの先端部の端面が潰れて、図7(d)のように、かしめができないか不十分である可能性がある。
(Other operations)
When the first concave shape 3 is not formed before the burring process as in this embodiment, in other words, the pilot hole 2a is formed in the flat caulking material 2 (the punched hole is punched out), and the pilot hole 2a is On the other hand, when the flange part 2A (burring part) is formed by burring forming, the flange part 2A has a cylindrical shape and is formed in a direction perpendicular to the plate surface, as shown in FIG. 7(a). Ru. Therefore, when the flange portion 2A is crushed from above in the caulking process (see FIGS. 7(b) to (d)), the end face of the tip of the flange portion 2A is crushed as shown in FIG. 7(c). Therefore, as shown in FIG. 7(d), caulking may not be possible or may be insufficient.

また、図8(a)のように、バーリング加工で下穴の外周を立ち上げて円筒状のフランジ部2Aを形成した後に、図8(b)のように、円錐パンチ40でフランジ部2Aを拡径して、フランジ部2Aをかしめ相手材1の上面に巻きつけるかしめ方法もある。しかし、成形下死点で、図8(b)に示すように、巻きつけ部に隙間が発生するため、その分、結合力が弱くなり、十分な接合強度が得られない。 Further, as shown in FIG. 8(a), after raising the outer periphery of the prepared hole by burring to form a cylindrical flange portion 2A, as shown in FIG. 8(b), the flange portion 2A is punched with a conical punch 40. There is also a caulking method in which the diameter is expanded and the flange portion 2A is wrapped around the upper surface of the caulking mating material 1. However, as shown in FIG. 8(b) at the bottom dead center of the molding, a gap is generated in the wrapped portion, which weakens the bonding force and makes it impossible to obtain sufficient bonding strength.

これに対し、本実施形態では、図5に示すように、かしめ相手材1における、フランジ部2Aが巻き付く面が、パンチ17の円錐面の傾斜に沿った方向に傾斜した部分(第2の凹形状4)であるため、巻き付いたフランジ部2Aと、かしめ相手材1のかしめ接合部(第2の凹形状4)が隙間無く接合して、両者の結合力が強くなり、十分な接合強度を有するかしめ接合を得ることができる。 On the other hand, in the present embodiment, as shown in FIG. Because of the concave shape 4), the wrapped flange part 2A and the caulked joint part (second concave shape 4) of the caulking mating material 1 are joined without any gaps, the bonding force between the two is strong, and sufficient joint strength is achieved. It is possible to obtain a caulked joint having the following properties.

また、パンチ17の円錐面でかしめのための荷重を負荷するため、フランジ部2Aの先端面も潰れ難くなる。
この結果、確実に、かしめ接合を実現することが可能となる。
Further, since the conical surface of the punch 17 applies the load for caulking, the tip surface of the flange portion 2A is also less likely to collapse.
As a result, caulking can be reliably realized.

(その他)
本開示は、以下のような構成も取ることができる。
(1)本実施形態は、複数の金属部品の板状部を、バーリング加工で形成されたフランジ部をかしめて接合する金属部品の接合方法であって、上記複数の金属部品から選択した金属部品であるかしめ材の板状部に下穴を形成する工程と、上記かしめ材以外の金属部品であるかしめ相手材の板状部における接合位置に開口を形成する工程と、上記かしめ材の下穴外周にバーリング加工を施して、下穴の周囲を立ち上げてフランジ部を形成するバーリング工程と、上記下穴と上記開口とを合わせてかしめ材の上にかしめ相手材を重ねた状態で、上記フランジ部をかしめて板状部同士を接合するかしめ工程と、を備え、上記バーリング工程の前に、上記かしめ材における上記下穴の外周部となる領域を、上記フランジ部の立ち上げ方向とは反対側に凹の第1の凹形状とする第1凹形状形成工程と、上記バーリング工程の前に、上記かしめ相手材における上記開口の外周部となる領域を、上記かしめ材の上にかしめ相手材を重ねた状態で上記第1の凹形状と同方向に凹で且つ上記第1の凹形状内に位置する第2の凹形状とする第2凹形状形成工程と、を有し、上記第1の凹形状内に、上記フランジ部となる領域が設定され、上記バーリング工程は、上記第1凹形状形成工程及び第2凹形状形成工程の後に実行され、上記下穴と上記開口とを合わせてかしめ材の上にかしめ相手材を重ね、且つ上記第1の凹形状内の外周部及び上記第2の凹形状内の外周部を拘束した状態で、下穴の周囲を立ち上げて上記フランジ部を形成し、上記かしめ工程は、上記第2の凹形状内の外周部で形成される凹部に向けて、上記フランジ部を曲げ成形することでかしめて、板状部同士を接合する。
(others)
The present disclosure can also take the following configuration.
(1) This embodiment is a method for joining metal parts in which plate-like parts of a plurality of metal parts are joined by caulking flange parts formed by burring, and the metal parts are selected from the plurality of metal parts. a step of forming a pilot hole in a plate-shaped portion of the caulking material, a step of forming an opening at a joining position in a plate-shaped portion of a metal component other than the caulking material, and a pilot hole in the caulking material. A burring process is performed in which the outer periphery is burred and the periphery of the pilot hole is raised to form a flange, and the pilot hole and the opening are aligned and the caulking material is stacked on top of the caulking material. a caulking step of caulking the flange portions to join the plate-like portions together; Before the first concave shape forming step of forming a first concave shape concave on the opposite side and the burring step, a region of the mating material to be caulked that will be the outer periphery of the opening is placed on the mating material to be caulked. forming a second concave shape that is concave in the same direction as the first concave shape and located within the first concave shape in a state where the materials are stacked, A region that will become the flange portion is set within the concave shape of No. 1, and the burring step is performed after the first concave shape forming step and the second concave shape forming step, and the prepared hole and the opening are aligned. Layer the material to be caulked on top of the caulking material, and with the outer periphery in the first concave shape and the outer circumference in the second concave shape restrained, raise the periphery of the prepared hole and tighten the flange. In the caulking step, the flange portion is bent and formed toward a concave portion formed at the outer periphery of the second concave shape, thereby caulking the plate-like portions.

この構成によれば、かしめ工程の際に、フランジ部を傾斜した第2の凹形状の部分に押しつけるように曲げ加工するという、簡単な操作によって、フランジ部を確実に負角にした状態で、かしめを行うことができる。 According to this configuration, during the caulking process, the flange portion can be reliably made into a negative angle by a simple operation of bending the flange portion so as to press it against the inclined second concave portion. Can be caulked.

この結果、バーリング加工を用いたかしめ接合について、金型形状などの金型構造を複雑化することなく、十分な接合強度を確保できる接合構造体を取得するができる。この結果、本発明の態様によれば、例えば、自動車部品におけるハイテン材を用いたかしめ接合や、異種材接合が可能となり、自動車車体の軽量化に貢献できる。 As a result, it is possible to obtain a bonded structure that can ensure sufficient bonding strength without complicating the mold structure such as the shape of the mold for caulking bonding using burring. As a result, according to the aspect of the present invention, for example, caulking and joining of high tensile strength materials and joining of dissimilar materials in automobile parts becomes possible, contributing to weight reduction of automobile bodies.

(2)上記第1凹形状形成工程と第2凹形状形成工程とは、かしめ材の上にかしめ相手材を重ねた状態で、1つのプレス加工で行われる。
この構成によれば、第1の凹形状と第2の凹形状を、一回のプレス加工で形成できる。
すなわち、重ねた状態とするだけで、第1の凹形状と第2の凹形状の凹みの成形が一つの金型で済み、第1の凹形状と第2の凹形状の位置合わせが簡単になる。
(2) The first concave shape forming step and the second concave shape forming step are performed in one press process with the caulking material overlaid on the caulking material.
According to this configuration, the first concave shape and the second concave shape can be formed by one press process.
That is, by simply placing them in an overlapping state, molding of the first concave shape and the second concave shape can be done using one mold, and the alignment of the first concave shape and the second concave shape can be easily performed. Become.

(3)上記金属部品のうち、少なくともかしめ相手材は、引張強度が270MPa以上の金属板からなる。
この構成によれば、仮にかしめ相手材1がアルミ合金材などの部材から構成されていても、より確実に異種材接合が可能となる。
(3) Among the metal parts, at least the material to be caulked is made of a metal plate having a tensile strength of 270 MPa or more.
According to this configuration, even if the caulking mating material 1 is made of a member such as an aluminum alloy material, dissimilar materials can be joined more reliably.

(4)本実施形態の接合部品の製造方法では、複数の金属部品の板状部を、本実施形態に記載の金属部品の接合方法で接合する。
この構成によれば、バーリング加工を用いた接合部品をより簡易に製造可能となる。
接合部品は、例えば自動車車体部品である。
(4) In the method for manufacturing a bonded component of this embodiment, the plate-like portions of a plurality of metal components are bonded by the method for bonding metal components described in this embodiment.
According to this configuration, it becomes possible to more easily manufacture a joined component using burring processing.
The joining part is, for example, an automobile body part.

(5)複数の金属部品の板状部が重ねられ、上記複数の金属部品から選択した金属部品であるかしめ材の板状部に形成された穴の外周部をバーリング加工で立ち上げられたフランジ部が、上記かしめ材以外の金属部品であるかしめ相手材の板状部における接合位置に形成された開口に挿入され、当該フランジ部が上記開口の外周側に向けてかしめられることで、重ねられた上記複数の板状部分が接合された金属部品の接合構造であって、上記フランジ部、及び上記フランジ部でかしめられた上記かしめ相手材の上記開口の外周部がともに、かしめられた部分の外周部に対し傾斜している、
金属部品の接合構造。
本実施形態に基づく上述のかしめ接合方法によって、本構造を構成することが可能である。
(5) A flange in which the plate-like parts of a plurality of metal parts are piled up and the outer periphery of the hole formed in the plate-like part of the caulking material, which is a metal part selected from the plurality of metal parts, is raised by burring. The part is inserted into an opening formed at the joining position in the plate-like part of the mating material to be caulked, which is a metal part other than the caulking material, and the flange part is caulked toward the outer circumferential side of the opening, so that the flange part is overlapped. A joining structure of metal parts in which the plurality of plate-like parts are joined, wherein the flange part and the outer periphery of the opening of the mating material to be caulked by the flange part are both connected to the caulked part. Slanted to the outer periphery,
Joint structure of metal parts.
This structure can be constructed by the above-described caulking method based on this embodiment.

1 かしめ相手材(金属部品)
1a 開口
2 かしめ材(金属部品)
2A フランジ部
2a 下穴
3 第1の凹形状
4 第2の凹形状
100 開口工程
101 下穴工程
102A 第1凹形状形成工程
102B 第2凹形状形成工程
103 バーリング工程
104 かしめ工程

1 Caulking mating material (metal parts)
1a Opening 2 Caulking material (metal parts)
2A Flange portion 2a Prepared hole 3 First concave shape 4 Second concave shape 100 Opening process 101 Prepared hole process 102A First concave shape forming process 102B Second concave shape forming process 103 Burring process 104 Caulking process

Claims (4)

複数の金属部品の板状部を、バーリング加工で形成されたフランジ部をかしめて接合する金属部品の接合方法であって、
上記複数の金属部品から選択した金属部品であるかしめ材の板状部に下穴を形成する工程と、
上記かしめ材以外の金属部品であるかしめ相手材の板状部における接合位置に開口を形成する工程と、
上記かしめ材の下穴外周にバーリング加工を施して、形成した上記下穴の周囲を立ち上げてフランジ部を形成するバーリング工程と、
形成した上記下穴と形成した上記開口とを合わせてかしめ材の上にかしめ相手材を重ねた状態で、形成した上記フランジ部をかしめて板状部同士を接合するかしめ工程と、
を備え、
上記バーリング工程の前に、上記かしめ材における上記下穴の外周部となる領域を、上記フランジ部の立ち上げ方向とは反対側に凹の第1の凹形状とする第1凹形状形成工程と、
上記バーリング工程の前に、上記かしめ相手材における上記開口の外周部となる領域を、上記かしめ材の上にかしめ相手材を重ねた状態で上記第1の凹形状と同方向に凹で且つ上記第1の凹形状内に位置する第2の凹形状とする第2凹形状形成工程と、
を有し、
上記第1の凹形状内に、上記フランジ部となる領域が設定され、
上記バーリング工程は、上記下穴と上記開口とを合わせて上記かしめ材の上に上記かしめ相手材を重ね、且つ上記第1の凹形状内の外周部及び上記第2の凹形状内の外周部を拘束した状態で、上記下穴の周囲を立ち上げて上記フランジ部を形成し、
上記かしめ工程は、上記第2の凹形状内の外周部に向けて、上記フランジ部を曲げ成形することでかしめて、板状部同士を接合する、
ことを特徴とする金属部品の接合方法。
A method for joining metal parts in which plate-like parts of a plurality of metal parts are joined by caulking flange parts formed by burring, the method comprising:
forming a pilot hole in a plate-shaped part of the caulking material, which is a metal part selected from the plurality of metal parts;
a step of forming an opening at a joining position in a plate-like part of a metal part other than the caulking material, which is a mating material to be caulked;
a burring step of performing burring on the outer periphery of the pilot hole of the caulking material and raising the periphery of the formed pilot hole to form a flange portion;
a caulking step of crimping the formed flange portion to join the plate-like portions together with the formed pilot hole and the formed opening aligned and a caulking material overlaid on the caulking material;
Equipped with
Before the burring step, a first concave shape forming step is performed in which a region of the caulking material that will become the outer periphery of the pilot hole is formed into a first concave shape that is concave on the opposite side to the direction in which the flange portion is raised. ,
Before the burring step, a region of the mating material to be caulked that will be the outer periphery of the opening is formed to have a concave shape in the same direction as the first concave shape with the mating material to be caulked stacked on the caulking material, and a second concave shape forming step of forming a second concave shape located within the first concave shape;
has
A region that will become the flange portion is set within the first concave shape,
In the burring step, the prepared hole and the opening are aligned, the caulking material is overlapped on the caulking material, and the outer periphery in the first concave shape and the outer periphery in the second concave shape While restraining, raise the periphery of the prepared hole to form the flange part,
The caulking step involves caulking the flange portion by bending it toward the outer periphery within the second concave shape to join the plate-like portions together.
A method for joining metal parts, characterized by:
上記第1凹形状形成工程と第2凹形状形成工程とは、かしめ材の上にかしめ相手材を重ねた状態で、1つのプレス加工で行われる、ことを特徴とする請求項1に記載した金属部品の接合方法。 The first concave shape forming step and the second concave shape forming step are performed by one pressing process with the caulking material superimposed on the caulking material. How to join metal parts. 上記金属部品のうち、少なくともかしめ相手材は、引張強度が270MPa以上の金属板からなる、請求項1又は請求項2に記載した金属部品の接合方法。 3. The method for joining metal parts according to claim 1, wherein at least the caulking mating material of the metal parts is made of a metal plate having a tensile strength of 270 MPa or more. 複数の金属部品の板状部を、請求項1~請求項3のいずれか1項に記載の金属部品の接合方法で接合する、接合部品の製造方法。 A method for manufacturing a bonded component, comprising bonding plate-shaped portions of a plurality of metal components using the metal component bonding method according to any one of claims 1 to 3.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195783A (en) 2000-12-25 2002-07-10 Denso Corp Oil cooler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195783A (en) 2000-12-25 2002-07-10 Denso Corp Oil cooler

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