JP4049025B2

JP4049025B2 - Joining method and joining apparatus

Info

Publication number: JP4049025B2
Application number: JP2003168167A
Authority: JP
Inventors: 真司山本; 晃橋本; 信弥奥村
Original assignee: Mazda Motor Corp
Current assignee: Mazda Motor Corp
Priority date: 2003-06-12
Filing date: 2003-06-12
Publication date: 2008-02-20
Anticipated expiration: 2023-06-12
Also published as: JP2005000959A

Description

【０００１】
【発明の属する技術分野】
本発明は、接合方法及び接合装置に関する。
【０００２】
【従来の技術】
従来、自動車等に使用される金属部材同士（例えば板体と軸体）を接合する場合には、板体の板面に形成された孔部に、該孔部の径に対して圧入代を持たせた軸体を圧入しながら両金属部材間に電気抵抗熱を発生させることにより該軸体を板体の孔部に接合する方法が知られている（特許文献１参照）。
【０００３】
【特許文献１】
特許第３２７０７５８号公報
【０００４】
【発明が解決しようとする課題】
しかし、上述の接合方法を、底壁部と該底壁部の周縁から立設した側壁部とからなる第１金属部材の該側壁部の端部内側に第２金属部材を圧入嵌合する場合に適用すると、該第２金属部材の圧入嵌合時に該第１金属部材の側壁部が外側に拡がって変形してしまい、接合不良が生じるとともに接合後の製品の平面度や平行度が悪化してしまうという問題がある。
【０００５】
本発明の課題は、上述のような金属部材同士を確実に接合できるとともに接合した後の製品の寸法バラツキを抑え、製品の平面度や平行度を高めるための接合方法及び接合装置を提供することにある。
【０００６】
【課題を解決するための手段】
本発明は、上記課題に対して、第１金属部材の側壁部が外側に拡がらないよう該側壁部の外周面に下側電極を当接させ、該下側電極を保持部材によって当該当接位置に保持した状態で上記圧入嵌合を行うことにより、該側壁部の外側への変形を防止して確実な接合を行うとともに製品の平面度や平行度を高めるようにした。
【０００７】
すなわち、請求項１に係る発明は、底壁部と該底壁部の周縁から立設した側壁部とを有する第１金属部材の該側壁部の端部内側に、第２金属部材を圧入嵌合しながら通電による電気抵抗熱で上記第１金属部材に接合する接合方法において、
上記第１金属部材の底壁部を受ける底部電極と該第１金属部材の側壁部の外周面に当接する一対の半円弧状の側部電極とからなる下側電極と、該一対の側部電極の各々の両端から外方へ突出した突部同士を互いに合わせた状態で該突部を狭持することで該側部電極を筒状に保持する保持部材とを用意し、
上記第１金属部材の底壁部を上記下側電極の底部電極で受け、円周方向に間隔をあけて立設された複数の円弧状壁で形成された該第１金属部材の側壁部の外周面に該下側電極の側部電極を当接し、
上記第１金属部材の側壁部が外側に拡がらないように、上記保持部材によって上記下側電極の側部電極を該側壁部に対する当接位置に保持した状態で上記第２金属部材に上側電極を当接し、該第２金属部材を上記第１金属部材の側壁部内側に圧入嵌合しながら、該上側電極から該両金属部材及び該下側電極の側部電極を介して底部電極に通電して、該第２金属部材の周縁部を該第１金属部材の各円弧状壁に接合することを特徴とする。
【０００８】
従って、請求項１に係る発明によれば、第２金属部材の圧入嵌合時に第１金属部材の側壁部が外側に拡がって変形することを保持部材によって防止でき、確実な接合を行うことができるとともに製品の平面度や平行度を高めることができる。また、第１金属部材の側壁部と第２金属部材との接触が側壁部全体にわたって均一になり、電気抵抗熱の発熱量のバラツキを抑えて当該接合品の品質を向上させることができる。特に、第１金属部材の側壁部が円周方向に間隔をあけて立設された複数の円弧状壁から形成されている場合、各円弧状壁が外側へ変形しやすいが、これを防止して当該接合品の品質を向上させることができる。
【０００９】
また、下側電極は第１金属部材の底壁部を受ける底部電極と、該第１金属部材の側壁部の外周面に当接する側部電極とから形成されているから、側部電極のみを保持部材で保持すれば第１金属部材の側壁部の外周面を当接した状態にすることができるため該保持部材を比較的簡単な構成にすることができる。また、下側電極のメンテナンス時には、側部電極と底部電極とのうちメンテナンスの必要な部品だけを選択して交換することができ部品コストの低減や交換作業時間の短縮に有利となる。
【００１０】
請求項２に係る発明は、底壁部と該底壁部の周縁から立設した側壁部とを有する第１金属部材の該側壁部の端部内側に、第２金属部材を圧入嵌合しながら通電による電気抵抗熱で上記第１金属部材に接合する接合装置であって、
上記第２金属部材に当接し該第２金属部材を上記第１金属部材に対して上記圧入のために加圧する上側電極と、
上記第１金属部材の底壁部を受ける底部電極と、該第１金属部材の側壁部の外周面に当接する一対の半円弧状の側部電極とからなる下側電極と、
上記圧入嵌合時に上記第１金属部材の側壁部が外側に拡がらないように、上記下側電極の側部電極を該側壁部に対する当接位置に保持する保持部材と、
上記両金属部材を介して上記両電極に通電する通電手段とを備え、
上記第１金属部材の側壁部は、円周方向に間隔をあけて立設された複数の円弧状壁から形成され、
上記保持部材は、上記一対の側部電極の各々の両端から外方へ突出した突部同士を互いに合わせた状態で該突部を狭持することで該側部電極を筒状に保持し、上記通電手段は上記上側電極から上記両金属部材及び上記下側電極の側部電極を介して上記底部電極に通電するように構成されていることを特徴とする。
【００１１】
従って、請求項２に係る発明によれば、上述の接合方法に係る発明を実施し、当該接合時に第１金属部材の側壁部が外側へ変形することを防止できるとともに、当該接合品の品質を向上させることができる。
【００１２】
また、下側電極は第１金属部材の底壁部を受ける底部電極と、該第１金属部材の側壁部の外周面に当接する側部電極とから形成されているから、側部電極のみを保持部材で保持すれば第１金属部材の側壁部の外周面を当接した状態にすることができるため該保持部材を比較的簡単な構成にすることができる。また、下側電極のメンテナンス時には、側部電極と底部電極とのうちメンテナンスの必要な部品だけを選択して交換することができ部品コストの低減や交換作業時間の短縮に有利となる。
【００１３】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【００１４】
−実施形態１−
図１及び図２において、１は上側電極、２は下側電極、３は該下側電極２を押圧保持する保持部材、４は接合装置１０の基部、５は基部４から立設した支柱、６は該支柱５に昇降自在に支持された可動板である。また、７は第１金属部材、８は第２金属部材を示す。
【００１５】
第１金属部材７は、円形状の底壁部７ａと該底壁部７ａの周縁から円周方向に間隔をあけて立設された複数の円弧状壁（側壁部）７ｂとから形成されている。そして、第２金属部材８は、円形状のプレート８ａと該プレート８ａの略中央から上下方向に延びるシャフト８ｂとを有している。
【００１６】
なお、本実施形態１の第１金属部材７は自動変速機の遊星歯車キャリアのキャリア本体であり、第２金属部材８は自動変速機の遊星歯車キャリアのプレートにシャフトを係合させたものであるが、第１及び第２金属部材７，８はこれに限定されるものではない。
【００１７】
上側電極１は、円筒形状のものであって可動板６に取り付けられており、その下端は第１金属部材７の円弧状壁７ｂの端部内側に第２金属部材８を圧入するために、該第２金属部材８のプレート８ａの外径と略同一に形成され、その筒孔が該第２金属部材８の上方向に延びるシャフト８ｂとの干渉を避けるための逃げ孔１ａに形成されている。
【００１８】
下側電極２は、第１金属部材７の底壁部７ａを受ける底部電極２ａと第１金属部材７の円弧状壁７ｂの外周面に当接する一対の半円弧状の側部電極２ｂ，２ｂとから構成されている。
【００１９】
底部電極２ａは、基部４の略中央に配設された円筒形状のものであって、その筒孔が第２金属部材８を第１金属部材７の嵌合位置に設置した時に該第２金属部材８の下方向に延びるシャフト８ｂとの干渉を避けるために逃げ孔１２ａに形成されている。また、第１金属部材７と第２金属部材８とを嵌合位置に位置合わせするための位置決めピン１３が絶縁材１３ａを介して該底部電極２ａに植設されており、第１金属部材７と第２金属部材８とには位置決めピン１３が嵌入する位置決め孔が形成されている。
【００２０】
上記一対の半円弧状の側部電極２ｂ，２ｂは、各々の両端に外方へ突出した突部１２ｂ，１２ｂを備え、互いに合わせられ、対応する突部１２ｂ，１２ｂ同士を上記保持部材３によって狭持して保持することによって、筒状電極を形成するようになっている。
【００２１】
すなわち、側部電極２ｂ，２ｂは、互いに合わせられて、上部に上記第１金属部材７の複数の円弧状壁７ｂに外側から嵌合する上部嵌合孔を形成し、下部に上記底部電極２ａに嵌合する下部嵌合孔を形成するようになっている。上部嵌合孔の内周面は円弧状壁７ｂの外周面に当接し、下部嵌合孔の内周面は底部電極２ａの外周面に当接するようになっている。上部嵌合孔内周面の円弧状壁７ｂに当接する部位は硬質電極２ｃによって形成されている。
【００２２】
上記側部電極２ｂ，２ｂの間には、該両電極２ｂ，２ｂを互いに離れる方向に付勢する付勢手段（圧縮バネ）１４，１４が設けられている。
【００２３】
上記保持部材３は、略コ字状に形成されたものであって、図３−（ａ）に示すように上記側部電極２ｂ，２ｂの互いに合わせられた突部１２ｂ，１２ｂに上から外嵌めされて、図３−（ｂ）に示すように該側部電極２ｂ，２ｂを上記付勢手段の付勢に抗して当該合わせ状態に保持するようになっている。突部１２ｂ，１２ｂの上部外側面には保持部材３の嵌合を案内するテーパ１２ｃが形成されている。
【００２４】
次に、本実施形態１に係る接合装置１０を用いて第１金属部材７と第２金属部材８とを接合する接合方法について説明する。
【００２５】
図１又は図２に示すように、下側電極２の側部電極２ｂ，２ｂが付勢手段１４，１４によって互いに離された状態において、第１金属部材７に設けられた位置決め孔を該下側電極２の底部電極２ａに植設された位置決めピン１３に挿入して位置決めし、該下側電極２に第１金属部材７を設置する。そして、側部電極２ｂ，２ｂの突部１２ｂ，１２ｂに保持部材３を嵌合して、該側部電極２ｂ，２ｂをその上部嵌合孔の内周面が該第１金属部材７の円弧状壁７ｂの外周面に当接し、下部嵌合孔の内周面が底部電極２ａの外周面に当接した状態に保持する。また、第２金属部材８の位置決め孔を上記位置決めピン１３に挿入することによって、第２金属部材８を第１金属部材７に位置決めする。
【００２６】
次に、上側電極１を下降させて該上側電極１の下面を第２金属部材８の上面に当接させた後、さらに該上側電極１を下降させて該第２金属部材８を第１金属部材７の円弧状壁７ｂの端部内側に圧入しながら該上側電極１から上記両金属部材７，８及び側部電極２ｂを介して該底部電極２ａに通電することにより、両金属部材７，８の嵌合部を抵抗熱溶接によって接合する。
【００２７】
従って、上記接合方法によれば、側部電極２ｂ、２ｂが保持部材３によって保持されているから、第２金属部材８の圧入嵌合時に第１金属部材７の各円弧状壁７ｂが外側に拡がって変形することを防止でき、当該接合品の平面度や平行度を高めることができる。また、各円弧状壁７ｂに対する第２金属部材８の接触が全体にわたって均一になるから、電気抵抗熱の発熱量のバラツキを抑えて接合品質を向上させることができる。
【００２８】
−実施形態２−
図４は、本実施形態２に係る接合装置２０を示している。実施形態１との相違点は、主に下側電極２の側部電極２ｂ，２ｂを保持する保持部材２１の構成であるため、以下、該保持部材２１についてのみ説明する。
【００２９】
保持部材２１は、側部電極２ｂ，２ｂの突部１２ｂ，１２ｂの側壁をその両側から押圧する第１及び第２押圧ローラ２２，２３と、該第１押圧ローラ２２の回転中心となる支点軸２４と、該第１押圧ローラ２２と該支点軸２４とを連結する連結アーム２５と、該第２押圧ローラ２３及び該支点軸２４を前後方向に移動可能にガイドするガイドレール２６と、該第２押圧ローラ２３と該支点軸２４とを連結するリンク部材２７とから構成されている。
【００３０】
リンク部材２７は、互いに連結された２本のリンク２７ａ，２７ａから形成されており、両リンク２７ａ，２７ａの連結点２７ｂと第２押圧ローラ２３と支点軸２４とがガイドレール２６上で一直線上に並ぶように両リンク２７ａ，２７ａを位置つけたときに、両押圧ローラ２２，２３が両側部電極２ｂ，２ｂを合わせ状態に押圧保持するようになっている。
【００３１】
下側電極２の側部電極２ｂ，２ｂの間に設けられた付勢手段１４，１４によって該側部電極２ｂ，２ｂは互いに離れるようになっているから、下側電極２の側部電極２ｂ，２ｂで第１金属部材７を保持するときには、連結点２７ｂを押圧保持位置に移動させて図示しないストッパで押圧保持位置に保持すればよい。これにより、両側部電極２ｂ，２ｂは両押圧ローラ２２，２３で互いに合わせられた状態に保持され、周囲方向から略均等な押圧力を与えることができる。
【００３２】
そうして、上記連結点２７ｂを押圧保持位置からずらすと、突部１２ｂに対する両押圧ローラ２２，２３の押圧保持状態が解除される。
【００３３】
なお、側部電極２ｂ，２ｂを第１金属部材７の円弧状壁７ｂに当接した状態に保持する方法として、本実施形態１又は２に示したもの以外にも、例えば保持部材としてシリンダを用いることもできる。
【００３４】
−実施形態３−
図５は、本実施形態３に係る接合装置３０を示している。本実施形態３は、上側電極１をプレス装置に取付手段３１で取り付けたことを特徴とする。なお、以下の説明では、実施形態１又は２と同様の記載についてはその詳細な説明を省略している。
【００３５】
第１金属部材７を保持する保持手段は実施形態１又は２と同様であり、基部４に設けられた下側電極２に第１金属部材７が設置され、第２金属部材８が該第１金属部材７の嵌合位置に設置されている。そして、該基部４が設置台３２に設置されている。該設置台３２は図示しない搬送手段により搬送されて、第１及び第２金属部材７，８が当該プレス位置に設置されるようになっている。そして、上記上側電極１で該第２金属部材８を第１金属部材７に圧入しながら該上側電極１に通電することにより両金属部材７，８が接合される。
【００３６】
また、上記設置台３２には、上記基部４を複数並べて配設しておくことができ、一方の基部４に設置した第１及び第２金属部材７，８の接合が完了した後、図示しない搬送手段により他方の設置台３２をプレス位置に搬送して、他方の第１及び第２金属部材７，８の接合作業を続けて行うことができる。このため、あらかじめ嵌合位置に設置した第１及び第２金属部材７，８を複数準備しておくことができ、作業性が高まるとともに作業時間の短縮になる。
【００３７】
【発明の効果】
請求項１に係る発明によれば、第２金属部材の圧入嵌合時に第１金属部材の側壁部が外側に拡がって変形することを保持部材によって防止でき、確実な接合を行うことができるとともに製品の平面度や平行度を高めることができる。また、第１金属部材の側壁部と第２金属部材との接触が側壁部全体にわたって均一になり、電気抵抗熱の発熱量のバラツキを抑えて当該接合品の品質を向上させることができる。特に、第１金属部材の側壁部が円周方向に間隔をあけて立設された複数の円弧状壁から形成されている場合、各円弧状壁が外側へ変形しやすいが、これを防止して当該接合品の品質を向上させることができる。
【００３８】
また、下側電極は第１金属部材の底壁部を受ける底部電極と、該第１金属部材の側壁部の外周面に当接する側部電極とから形成されているから、側部電極のみを保持部材で保持すれば第１金属部材の側壁部の外周面を当接した状態にすることができるため該保持部材を比較的簡単な構成にすることができる。また、下側電極のメンテナンス時には、側部電極と底部電極とのうちメンテナンスの必要な部品だけを選択して交換することができ部品コストの低減や交換作業時間の短縮に有利となる。
【００３９】
請求項２に係る発明によれば、上述の接合方法に係る発明を実施し、当該接合時に第１金属部材の側壁部が外側へ変形することを防止できるとともに、当該接合品の品質を向上させることができる。
【００４０】
また、下側電極は第１金属部材の底壁部を受ける底部電極と、該第１金属部材の側壁部の外周面に当接する側部電極とから形成されているから、側部電極のみを保持部材で保持すれば第１金属部材の側壁部の外周面を当接した状態にすることができるため該保持部材を比較的簡単な構成にすることができる。また、下側電極のメンテナンス時には、側部電極と底部電極とのうちメンテナンスの必要な部品だけを選択して交換することができ部品コストの低減や交換作業時間の短縮に有利となる。
【図面の簡単な説明】
【図１】本実施形態１に係る接合装置を示す縦断面図。
【図２】本実施形態１に係る接合装置を示す平面図。
【図３】（ａ）本実施形態１に係る保持部材を嵌合する前の状態を示す側面図。
（ｂ）本実施形態１に係る保持部材を嵌合した後の状態を示す側面図。
【図４】本実施形態２に係る接合装置を示す平面図。
【図５】本実施形態３に係る接合装置を示す縦断面図。
【符号の説明】
１上側電極
２下側電極
２ａ底部電極
２ｂ側部電極
３保持部材
４基部
５支柱
６可動板
７第１金属部材
８第２金属部材
１０接合装置
１２ａ逃げ孔
１２ｂ突部
１３位置決めピン
１４付勢手段
２０接合装置
２１保持部材
２２第１押圧ローラ
２３第２押圧ローラ
２４支点軸
２５連結アーム
２６ガイドレール
２７リンク部材
２７ａリンク
２７ｂ連結点
３０接合装置
３１取付手段
３２設置台[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bonding method and a bonding apparatus.
[0002]
[Prior art]
Conventionally, when metal members used in automobiles or the like (for example, a plate body and a shaft body) are joined, a press-fitting allowance is made with respect to the diameter of the hole portion in the hole portion formed on the plate surface of the plate body. A method of joining the shaft body to the hole of the plate body by generating electric resistance heat between both metal members while press-fitting the held shaft body is known (see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent No. 3270758 [0004]
[Problems to be solved by the invention]
However, in the case where the second metal member is press-fitted into the end portion of the side wall portion of the first metal member composed of the bottom wall portion and the side wall portion erected from the periphery of the bottom wall portion by the above-described joining method. When applied to the second metal member, when the second metal member is press-fitted and fitted, the side wall portion of the first metal member spreads outward and deforms, resulting in poor bonding and poor flatness and parallelism of the product after bonding. There is a problem that it ends up.
[0005]
The subject of this invention is providing the joining method and joining apparatus for suppressing the dimensional variation of the product after joining while being able to join the above metal members reliably, and raising the flatness and parallelism of a product. It is in.
[0006]
[Means for Solving the Problems]
In the present invention, the lower electrode is brought into contact with the outer peripheral surface of the side wall portion so that the side wall portion of the first metal member does not spread outward, and the lower electrode is brought into contact with the holding member. By performing the above-described press-fitting while being held in position, the side wall portion is prevented from being deformed to the outside so as to perform reliable bonding and improve the flatness and parallelism of the product.
[0007]
That is, in the invention according to claim 1, the second metal member is press-fitted inside the end portion of the side wall portion of the first metal member having the bottom wall portion and the side wall portion erected from the periphery of the bottom wall portion. In the joining method of joining to the first metal member by electrical resistance heat by energization while joining,
A lower electrode comprising a bottom electrode for receiving a bottom wall portion of the first metal member and a pair of semicircular arc-shaped side electrodes in contact with an outer peripheral surface of the side wall portion of the first metal member; and the pair of side portions A holding member for holding the side electrode in a cylindrical shape by holding the protrusion in a state where the protrusions protruding outward from both ends of each electrode are aligned with each other,
The bottom wall portion of the first metal member is received by the bottom electrode of the lower electrode, and the side wall portion of the first metal member formed by a plurality of arcuate walls standing at intervals in the circumferential direction is provided. Abutting the side electrode of the lower electrode on the outer peripheral surface;
As the side wall portion of the first metal member is not spread outwardly, the upper electrode to the second metal member while holding the abutting position side electrodes of the lower electrode with respect to the side wall portion by the retaining member And the bottom electrode is energized from the upper electrode via the both metal members and the side electrodes of the lower electrode while the second metal member is press-fitted into the side wall of the first metal member. And the peripheral part of this 2nd metal member is joined to each circular-arc-shaped wall of this 1st metal member, It is characterized by the above-mentioned .
[0008]
Therefore, according to the invention which concerns on Claim 1, it can prevent by a holding member that the side wall part of a 1st metal member spreads outside at the time of press fitting of a 2nd metal member, and can perform reliable joining. In addition, the flatness and parallelism of the product can be increased. In addition, the contact between the side wall portion of the first metal member and the second metal member is uniform over the entire side wall portion, and variation in the amount of heat generated by the electrical resistance heat can be suppressed to improve the quality of the joined product. In particular , when the side wall portion of the first metal member is formed of a plurality of arc-shaped walls standing at intervals in the circumferential direction, each arc-shaped wall is easily deformed outward, but this is prevented. Thus, the quality of the joined product can be improved.
[0009]
Further, since the lower electrode is formed of a bottom electrode that receives the bottom wall portion of the first metal member and a side electrode that contacts the outer peripheral surface of the side wall portion of the first metal member, only the side electrode is formed. If held by the holding member, the outer peripheral surface of the side wall of the first metal member can be brought into contact with the holding member, so that the holding member can have a relatively simple configuration. Further, during maintenance of the lower electrode, it is possible to select and replace only the parts requiring maintenance from the side electrode and the bottom electrode, which is advantageous for reducing the cost of parts and shortening the replacement work time.
[0010]
According to a second aspect of the present invention, the second metal member is press-fitted and fitted inside the end portion of the side wall portion of the first metal member having a bottom wall portion and a side wall portion erected from the periphery of the bottom wall portion. A joining device that joins the first metal member with electric resistance heat by energization while energizing,
An upper electrode that contacts the second metal member and pressurizes the second metal member against the first metal member for the press-fitting;
A lower electrode comprising a bottom electrode for receiving the bottom wall portion of the first metal member, and a pair of semicircular arc-shaped side electrodes in contact with the outer peripheral surface of the side wall portion of the first metal member ;
A holding member that holds the side electrode of the lower electrode in a contact position with respect to the side wall portion so that the side wall portion of the first metal member does not spread outward during the press-fitting,
An energization means for energizing the electrodes through the metal members ,
The side wall portion of the first metal member is formed from a plurality of arcuate walls that are erected at intervals in the circumferential direction,
The holding member holds the side electrodes in a cylindrical shape by holding the protrusions in a state in which the protrusions protruding outward from both ends of the pair of side electrodes are aligned with each other. The energizing means is configured to energize the bottom electrode from the upper electrode through the both metal members and the side electrodes of the lower electrode .
[0011]
Therefore, according to the invention which concerns on Claim 2, while implementing the invention which concerns on the above-mentioned joining method, it can prevent that the side wall part of a 1st metal member deform | transforms outside at the time of the said joining, and the quality of the said joining goods is improved. Can be improved.
[0012]
Further, since the lower electrode is formed of a bottom electrode that receives the bottom wall portion of the first metal member and a side electrode that contacts the outer peripheral surface of the side wall portion of the first metal member, only the side electrode is formed. If held by the holding member, the outer peripheral surface of the side wall of the first metal member can be brought into contact with the holding member, so that the holding member can have a relatively simple configuration. Further, during maintenance of the lower electrode, it is possible to select and replace only the parts requiring maintenance from the side electrode and the bottom electrode, which is advantageous for reducing the cost of parts and shortening the replacement work time.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
Embodiment 1
1 and FIG. 2, 1 is an upper electrode, 2 is a lower electrode, 3 is a holding member that presses and holds the lower electrode 2, 4 is a base of the bonding apparatus 10, 5 is a column that is erected from the base 4, Reference numeral 6 denotes a movable plate supported by the column 5 so as to be movable up and down. Reference numeral 7 denotes a first metal member, and 8 denotes a second metal member.
[0015]
The first metal member 7 is formed of a circular bottom wall portion 7a and a plurality of arc-shaped walls (side wall portions) 7b that are erected from the periphery of the bottom wall portion 7a in the circumferential direction. Yes. The second metal member 8 includes a circular plate 8a and a shaft 8b extending in the vertical direction from the approximate center of the plate 8a.
[0016]
The first metal member 7 of the first embodiment is a carrier body of a planetary gear carrier of an automatic transmission, and the second metal member 8 is a member in which a shaft is engaged with a plate of a planetary gear carrier of an automatic transmission. However, the first and second metal members 7 and 8 are not limited to this.
[0017]
The upper electrode 1 has a cylindrical shape and is attached to the movable plate 6. The lower end of the upper electrode 1 is used to press-fit the second metal member 8 into the end of the arcuate wall 7 b of the first metal member 7. The outer diameter of the plate 8a of the second metal member 8 is formed substantially the same, and the cylindrical hole is formed in the escape hole 1a for avoiding interference with the shaft 8b extending upward of the second metal member 8. Yes.
[0018]
The lower electrode 2 includes a pair of semicircular arc-shaped side electrodes 2b and 2b that contact the outer peripheral surface of the bottom electrode 2a that receives the bottom wall 7a of the first metal member 7 and the arc-shaped wall 7b of the first metal member 7. It consists of and.
[0019]
The bottom electrode 2a has a cylindrical shape disposed substantially at the center of the base 4 and the second metal is formed when the cylindrical hole of the second metal member 8 is installed at the fitting position of the first metal member 7. In order to avoid interference with the shaft 8b extending downward of the member 8, it is formed in the escape hole 12a. Further, a positioning pin 13 for aligning the first metal member 7 and the second metal member 8 at the fitting position is implanted in the bottom electrode 2a via an insulating material 13a. The second metal member 8 has a positioning hole into which the positioning pin 13 is fitted.
[0020]
The pair of semicircular arc-shaped side electrodes 2b, 2b are provided with protrusions 12b, 12b protruding outward at both ends, and are aligned with each other, and the corresponding protrusions 12b, 12b are held together by the holding member 3. A cylindrical electrode is formed by holding and holding.
[0021]
That is, the side electrodes 2b and 2b are aligned with each other to form an upper fitting hole that fits into the plurality of arcuate walls 7b of the first metal member 7 from the outside, and the bottom electrode 2a at the bottom. The lower fitting hole which fits to is formed. The inner peripheral surface of the upper fitting hole is in contact with the outer peripheral surface of the arcuate wall 7b, and the inner peripheral surface of the lower fitting hole is in contact with the outer peripheral surface of the bottom electrode 2a. A portion of the inner surface of the upper fitting hole that is in contact with the arcuate wall 7b is formed by the hard electrode 2c.
[0022]
Between the side electrodes 2b and 2b, urging means (compression springs) 14 and 14 for urging the electrodes 2b and 2b away from each other are provided.
[0023]
The holding member 3 is formed in a substantially U-shape, and as shown in FIG. 3- (a), the side electrodes 2b, 2b are projected to the protrusions 12b, 12b aligned with each other from above. As shown in FIG. 3B, the side electrodes 2b and 2b are held in the aligned state against the urging force of the urging means. A taper 12c that guides the fitting of the holding member 3 is formed on the upper outer surface of the protrusions 12b, 12b.
[0024]
Next, a joining method for joining the first metal member 7 and the second metal member 8 using the joining apparatus 10 according to the first embodiment will be described.
[0025]
As shown in FIG. 1 or FIG. 2, in the state where the side electrodes 2b, 2b of the lower electrode 2 are separated from each other by the urging means 14, 14, the positioning hole provided in the first metal member 7 is formed in the lower hole. The first metal member 7 is placed on the lower electrode 2 by inserting into the positioning pin 13 planted on the bottom electrode 2 a of the side electrode 2 and positioning. Then, the holding member 3 is fitted to the projections 12b, 12b of the side electrodes 2b, 2b, and the inner circumference of the upper fitting hole of the side electrodes 2b, 2b is a circle of the first metal member 7. The outer peripheral surface of the arcuate wall 7b is contacted, and the inner peripheral surface of the lower fitting hole is held in contact with the outer peripheral surface of the bottom electrode 2a. Further, the second metal member 8 is positioned on the first metal member 7 by inserting the positioning hole of the second metal member 8 into the positioning pin 13.
[0026]
Next, the upper electrode 1 is lowered to bring the lower surface of the upper electrode 1 into contact with the upper surface of the second metal member 8, and then the upper electrode 1 is further lowered to bring the second metal member 8 into the first metal. By energizing the bottom electrode 2a from the upper electrode 1 through the both metal members 7, 8 and the side electrode 2b while being press-fitted inside the end of the arcuate wall 7b of the member 7, both the metal members 7, 8 fitting parts are joined by resistance heat welding.
[0027]
Therefore, according to the joining method, since the side electrodes 2b and 2b are held by the holding member 3, each arcuate wall 7b of the first metal member 7 faces outward when the second metal member 8 is press-fitted. Expansion and deformation can be prevented, and the flatness and parallelism of the joined product can be increased. In addition, since the contact of the second metal member 8 with each arcuate wall 7b is uniform throughout, it is possible to improve the bonding quality by suppressing variations in the amount of heat generated by the electric resistance heat.
[0028]
Embodiment 2
FIG. 4 shows a bonding apparatus 20 according to the second embodiment. Since the difference from the first embodiment is mainly the configuration of the holding member 21 that holds the side electrodes 2b, 2b of the lower electrode 2, only the holding member 21 will be described below.
[0029]
The holding member 21 includes first and second pressing rollers 22 and 23 that press the side walls of the protrusions 12b and 12b of the side electrodes 2b and 2b from both sides thereof, and a fulcrum shaft that serves as a rotation center of the first pressing roller 22. 24, a connecting arm 25 that connects the first pressing roller 22 and the fulcrum shaft 24, a guide rail 26 that guides the second pressing roller 23 and the fulcrum shaft 24 movably in the front-rear direction, and the first It is comprised from the link member 27 which connects the 2 press roller 23 and this fulcrum shaft 24.
[0030]
The link member 27 is formed of two links 27a and 27a connected to each other, and the connection point 27b of the links 27a and 27a, the second pressing roller 23, and the fulcrum shaft 24 are aligned on the guide rail 26. When the two links 27a and 27a are positioned so as to line up with each other, both the pressing rollers 22 and 23 press and hold the both side electrodes 2b and 2b in a combined state.
[0031]
Since the side electrodes 2b and 2b are separated from each other by the biasing means 14 and 14 provided between the side electrodes 2b and 2b of the lower electrode 2, the side electrodes 2b of the lower electrode 2 are separated from each other. , 2b, the connecting point 27b may be moved to the press holding position and held at the press holding position by a stopper (not shown). As a result, the side electrodes 2b and 2b are held in a state where they are aligned with each other by the pressing rollers 22 and 23, and a substantially uniform pressing force can be applied from the peripheral direction.
[0032]
Then, when the connecting point 27b is shifted from the pressing and holding position, the pressing and holding state of the pressing rollers 22 and 23 with respect to the protrusion 12b is released.
[0033]
As a method for holding the side electrodes 2b and 2b in a state of being in contact with the arcuate wall 7b of the first metal member 7, for example, a cylinder as a holding member other than the one shown in the first or second embodiment. It can also be used.
[0034]
Embodiment 3
FIG. 5 shows a joining device 30 according to the third embodiment. The third embodiment is characterized in that the upper electrode 1 is attached to the press device by the attaching means 31. In the following description, detailed description of the same descriptions as those in Embodiment 1 or 2 is omitted.
[0035]
The holding means for holding the first metal member 7 is the same as in the first or second embodiment. The first metal member 7 is installed on the lower electrode 2 provided on the base 4, and the second metal member 8 is the first metal member 8. It is installed at the fitting position of the metal member 7. The base 4 is installed on the installation table 32. The installation table 32 is conveyed by conveyance means (not shown) so that the first and second metal members 7 and 8 are installed at the press position. Then, both the metal members 7 and 8 are joined by energizing the upper electrode 1 while pressing the second metal member 8 into the first metal member 7 with the upper electrode 1.
[0036]
In addition, a plurality of the bases 4 can be arranged side by side on the installation base 32, and after the joining of the first and second metal members 7 and 8 installed on one of the bases 4 is completed, they are not shown. The other installation table 32 can be conveyed to the press position by the conveying means, and the joining operation of the other first and second metal members 7 and 8 can be continued. For this reason, it is possible to prepare a plurality of first and second metal members 7 and 8 installed in advance in the fitting position, so that workability is improved and work time is shortened.
[0037]
【The invention's effect】
According to the first aspect of the present invention, the holding member can prevent the side wall portion of the first metal member from expanding outwardly and deforming when the second metal member is press-fitted, and reliable bonding can be performed. Product flatness and parallelism can be increased. In addition, the contact between the side wall portion of the first metal member and the second metal member is uniform over the entire side wall portion, and variation in the amount of heat generated by the electrical resistance heat can be suppressed to improve the quality of the joined product. In particular , when the side wall portion of the first metal member is formed of a plurality of arc-shaped walls standing at intervals in the circumferential direction, each arc-shaped wall is easily deformed outward, but this is prevented. Thus, the quality of the joined product can be improved.
[0038]
Further, since the lower electrode is formed of a bottom electrode that receives the bottom wall portion of the first metal member and a side electrode that contacts the outer peripheral surface of the side wall portion of the first metal member, only the side electrode is formed. If held by the holding member, the outer peripheral surface of the side wall of the first metal member can be brought into contact with the holding member, so that the holding member can have a relatively simple configuration. Further, during maintenance of the lower electrode, it is possible to select and replace only the parts requiring maintenance from the side electrode and the bottom electrode, which is advantageous for reducing the cost of parts and shortening the replacement work time.
[0039]
According to the invention according to claim 2, the invention according to the above-described joining method is implemented, and the side wall portion of the first metal member can be prevented from being deformed to the outside during the joining, and the quality of the joined product is improved. be able to.
[0040]
Further, since the lower electrode is formed of a bottom electrode that receives the bottom wall portion of the first metal member and a side electrode that contacts the outer peripheral surface of the side wall portion of the first metal member, only the side electrode is formed. If held by the holding member, the outer peripheral surface of the side wall of the first metal member can be brought into contact with the holding member, so that the holding member can have a relatively simple configuration. Further, during maintenance of the lower electrode, it is possible to select and replace only the parts requiring maintenance from the side electrode and the bottom electrode, which is advantageous for reducing the cost of parts and shortening the replacement work time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a bonding apparatus according to a first embodiment.
FIG. 2 is a plan view showing the bonding apparatus according to the first embodiment.
3A is a side view showing a state before the holding member according to Embodiment 1 is fitted. FIG.
(B) The side view which shows the state after fitting the holding member which concerns on this Embodiment 1. FIG.
FIG. 4 is a plan view showing a bonding apparatus according to a second embodiment.
FIG. 5 is a longitudinal sectional view showing a bonding apparatus according to a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper electrode 2 Lower electrode 2a Bottom electrode 2b Side electrode 3 Holding member 4 Base part 5 Support | pillar 6 Movable plate 7 1st metal member 8 2nd metal member 10 Joining device 12a Escape hole 12b Protrusion 13 Positioning pin 14 Energizing means DESCRIPTION OF SYMBOLS 20 Joining device 21 Holding member 22 1st press roller 23 2nd press roller 24 Support axis 25 Connection arm 26 Guide rail 27 Link member 27a Link 27b Connection point 30 Joining device 31 Mounting means 32 Installation stand

Claims

The electric resistance heat generated by energization while press-fitting the second metal member inside the end portion of the side wall portion of the first metal member having the bottom wall portion and the side wall portion erected from the periphery of the bottom wall portion. In the joining method for joining to the first metal member,
A lower electrode comprising a bottom electrode for receiving a bottom wall portion of the first metal member and a pair of semicircular arc-shaped side electrodes in contact with an outer peripheral surface of the side wall portion of the first metal member; and the pair of side portions A holding member that holds the side electrode in a cylindrical shape by holding the protrusion in a state where the protrusions protruding outward from both ends of each electrode are aligned with each other,
The bottom wall portion of the first metal member is received by the bottom electrode of the lower electrode, and the side wall portion of the first metal member formed by a plurality of arcuate walls standing at intervals in the circumferential direction is provided. Abutting the side electrode of the lower electrode on the outer peripheral surface;
As the side wall portion of the first metal member is not spread outwardly, the upper electrode to the second metal member while holding the abutting position side electrodes of the lower electrode with respect to the side wall portion by the retaining member And the bottom electrode is energized from the upper electrode via the both metal members and the side electrodes of the lower electrode while the second metal member is press-fitted into the side wall of the first metal member. And the joining method characterized by joining the peripheral part of this 2nd metal member to each circular-arc-shaped wall of this 1st metal member .

The electric resistance heat generated by energization while press-fitting the second metal member inside the end portion of the side wall portion of the first metal member having the bottom wall portion and the side wall portion erected from the periphery of the bottom wall portion. A joining device for joining to a first metal member,
An upper electrode that contacts the second metal member and pressurizes the second metal member against the first metal member for the press-fitting;
A lower electrode comprising a bottom electrode for receiving the bottom wall portion of the first metal member, and a pair of semicircular arc-shaped side electrodes in contact with the outer peripheral surface of the side wall portion of the first metal member ;
A holding member that holds the side electrode of the lower electrode in a contact position with respect to the side wall portion so that the side wall portion of the first metal member does not spread outward during the press-fitting,
An energization means for energizing the electrodes through the metal members ,
The side wall portion of the first metal member is formed from a plurality of arcuate walls that are erected at intervals in the circumferential direction,
The holding member holds the side electrodes in a cylindrical shape by holding the protrusions in a state in which the protrusions protruding outward from both ends of the pair of side electrodes are aligned with each other. The joining apparatus, wherein the energizing means is configured to energize the bottom electrode from the upper electrode through the both metal members and the side electrodes of the lower electrode .