JP6119795B2 - Metal member joining method and metal member joining structure - Google Patents

Metal member joining method and metal member joining structure Download PDF

Info

Publication number
JP6119795B2
JP6119795B2 JP2015098468A JP2015098468A JP6119795B2 JP 6119795 B2 JP6119795 B2 JP 6119795B2 JP 2015098468 A JP2015098468 A JP 2015098468A JP 2015098468 A JP2015098468 A JP 2015098468A JP 6119795 B2 JP6119795 B2 JP 6119795B2
Authority
JP
Japan
Prior art keywords
metal member
joining
inclined surface
inner diameter
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2015098468A
Other languages
Japanese (ja)
Other versions
JP2016209926A (en
Inventor
晃 橋本
晃 橋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP2015098468A priority Critical patent/JP6119795B2/en
Publication of JP2016209926A publication Critical patent/JP2016209926A/en
Application granted granted Critical
Publication of JP6119795B2 publication Critical patent/JP6119795B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)
  • Gears, Cams (AREA)
  • Gear-Shifting Mechanisms (AREA)

Description

本発明は、開口部が設けられた第1金属部材の内周壁部と第2金属部材の外周壁部との接合方法及び接合構造に関する。   The present invention relates to a joining method and a joining structure between an inner peripheral wall portion of a first metal member provided with an opening and an outer peripheral wall portion of a second metal member.

開口部を有する第1金属部材と第2金属部材を接合するケースとしては、例えば、車両用手動変速機の回転軸に遊転自在に嵌められる変速ギヤ(第2金属部材)に対するシンクロ用コーン部を有するクラッチギヤ(第1金属部材)の接合がある。特許文献1には、その接合に電子ビーム溶接法を採用することが記載されている。それは、クラッチギヤの開口部に変速ギヤを嵌め、真空中においてその嵌合部に電子ビームを照射するというものである。しかし、この方法では、ワークを真空容器にセットする必要があり、真空引きに時間がかかるため、生産性の向上が難しい。また、電子ビームの照射に伴って溶融物が飛散して接合部近傍に付着する問題(スパッター付着問題)があり、このことも生産性を落とす一因になっている。   As a case for joining the first metal member having the opening and the second metal member, for example, a synchro cone portion for a transmission gear (second metal member) that is freely fitted on a rotating shaft of a vehicle manual transmission. There is a clutch gear (first metal member) joining. Patent Document 1 describes that an electron beam welding method is employed for the joining. That is, a transmission gear is fitted into an opening of a clutch gear, and the fitting portion is irradiated with an electron beam in a vacuum. However, in this method, it is necessary to set the work in a vacuum vessel, and it takes time to evacuate, so it is difficult to improve productivity. In addition, there is a problem that the molten material scatters and adheres to the vicinity of the joint (spatter adhesion problem) with the irradiation of the electron beam, which also contributes to a decrease in productivity.

これに対して、開口部を有する第1金属部材と第2金属部材の接合方法として、リングマッシュ溶接法が知られている。例えば、特許文献2には、第1金属部材の内周壁部と第2金属部材の外周壁部を軸方向に離れた2箇所においてリングマッシュ溶接法によって同時に接合することが記載されている。   On the other hand, the ring mash welding method is known as a joining method of the 1st metal member which has an opening part, and a 2nd metal member. For example, Patent Document 2 describes that the inner peripheral wall portion of the first metal member and the outer peripheral wall portion of the second metal member are simultaneously joined at two locations separated in the axial direction by a ring mash welding method.

この方法では、第1金属部材の内周壁部に内径が相違する第1内径部及び第2内径部が形成され、第2金属部材の外周壁部に直径が第1金属部材の第1内径部及び第2内径部よりも大きい第1外径部及び第2外径部が形成される。すなわち、第1内径部と第1外径部にラップ代が設けられ、第2内径部と第2外径部にラップ代が設けられる。そして、第1金属部材の第1及び第2の両内径部に第2金属部材の第1及び第2の両外径部をそれぞれ軸方向において当接し、一対の電極によって両金属部材に対する軸方向の加圧と通電がなされる。この方法によれば、真空引きは不要であり、また、2箇所の接合が良好であれば、強固な接合物が得られる。   In this method, a first inner diameter portion and a second inner diameter portion having different inner diameters are formed on the inner peripheral wall portion of the first metal member, and the first inner diameter portion of the first metal member has a diameter on the outer peripheral wall portion of the second metal member. A first outer diameter portion and a second outer diameter portion that are larger than the second inner diameter portion are formed. That is, a lapping margin is provided for the first inner diameter portion and the first outer diameter portion, and a lapping margin is provided for the second inner diameter portion and the second outer diameter portion. Then, both the first and second outer diameter portions of the second metal member are brought into contact with each of the first and second inner diameter portions of the first metal member in the axial direction, and the axial direction with respect to both metal members is performed by the pair of electrodes. Is pressurized and energized. According to this method, evacuation is not necessary, and a strong bonded product can be obtained if bonding at two locations is good.

特開2014−57970号公報JP 2014-57970 A 特開2011−98358号公報JP 2011-98358 A

特許文献2に記載された方法の場合、第1内径部と第1外径部の当接部と、第2内径部と第2外径部の当接部の2箇所に同時に電流が流れる。しかし、この2箇所のラップ代が相違する場合は、当該2箇所では通電抵抗が異なるから、発熱量が相違し、いずれか一方に接合不良を生ずることになる。しかも、当該2箇所のラップ代が相違する場合は、発熱量が相違するだけでなく、ラップ代が大きい側では金属部材に割れを生じ易くなり、ラップ代が小さい側では十分な接合強度が得られないという問題も生ずる。これに対して、当該2箇所をラップ代が同一になるように加工することは、高い加工精度が必要となって難しい。   In the case of the method described in Patent Document 2, a current flows simultaneously through two locations, that is, a contact portion between the first inner diameter portion and the first outer diameter portion, and a contact portion between the second inner diameter portion and the second outer diameter portion. However, when the lap allowances of these two places are different, the energization resistance is different between the two places, so that the heat generation amount is different, resulting in poor bonding in either one. In addition, when the lap allowances of the two places are different, not only the calorific value is different, but the metal member tends to crack on the side where the lap allowance is large, and sufficient bonding strength is obtained on the side where the lap allowance is small. The problem that it is not possible also arises. On the other hand, it is difficult to process the two locations so that the lapping cost is the same because high processing accuracy is required.

そこで、本発明者は、上記第1金属部材と第2金属部材の接合において、リングマッシュ溶接法による接合を1箇所にすることを検討した。その一例を図11に示す。クラッチギヤ(第1金属部材)aの内周壁部が変速ギヤ(第2金属部材)bの外周壁部に対してリングマッシュ溶接法による接合部cで接合されているとともに、クラッチギヤaの一端が変速ギヤbの外周壁の段部dで受けられている。   In view of this, the present inventor has studied to join the first metal member and the second metal member by one ring mash welding method. An example is shown in FIG. The inner peripheral wall portion of the clutch gear (first metal member) a is joined to the outer peripheral wall portion of the transmission gear (second metal member) b by a joint c by ring mash welding, and one end of the clutch gear a Is received by the step portion d of the outer peripheral wall of the transmission gear b.

しかし、溶接後に熱処理を行なったところ、熱処理変形によって、クラッチギヤaと変速ギヤbの外周壁の段部dの間に微小な隙間を生じ、接合部cから当該ギヤにクラックが入り易くなるという新たな問題が見出された。この点を説明するに、クラッチペダルの踏み込みが甘い状態でシフトレバーが操作されると、ハブスリーブのスプラインがクラッチギヤaのスプラインeに噛み合う際に、クラッチギヤaに大きな衝撃が加わる。その場合、上記隙間のために、接合部cの先端fに衝撃荷重が入る。そして、このような衝撃荷重の入力が繰り返されると、上記接合部cの先端fからクラッチギヤa又は変速ギヤbにクラックが入ることになる。   However, when heat treatment is performed after welding, a minute gap is generated between the step portion d of the outer peripheral wall of the clutch gear a and the transmission gear b due to heat treatment deformation, and cracks are likely to be generated in the gear from the joint portion c. A new problem has been found. To explain this point, if the shift lever is operated while the clutch pedal is not fully depressed, a large impact is applied to the clutch gear a when the spline of the hub sleeve meshes with the spline e of the clutch gear a. In that case, an impact load is applied to the tip f of the joint c due to the gap. When the input of such an impact load is repeated, a crack occurs in the clutch gear a or the transmission gear b from the tip f of the joint c.

以上に鑑み、本発明は、衝撃に強い接合構造を得ること及び生産性を高くすることを課題とする。   In view of the above, an object of the present invention is to obtain a joint structure that is resistant to impact and to increase productivity.

本発明は、上記課題を解決するために、第1金属部材と第2金属部材をリングマッシュ溶接法によって接合すると同時に、両金属部材間にテーパ嵌合部を形成するようにした。   In the present invention, in order to solve the above-mentioned problem, the first metal member and the second metal member are joined by the ring mash welding method, and at the same time, a tapered fitting portion is formed between the two metal members.

ここに開示する金属部材の接合方法は、開口部が設けられた第1金属部材と、該第1金属部材の当該開口部を囲む内周壁部に部分的に接触可能な外周壁部を有する第2金属部材とを、軸方向に加圧しつつ通電による抵抗発熱によって接合する方法であって、
上記第1金属部材の内周壁部に、所定の内径を有する接合用内径部と、該接合用内径部から軸方向に離れる距離が大きくなるに従って内径が漸次拡大するように傾斜した傾斜面部とを形成する第1工程と、
上記第2金属部材の外周壁部に、上記接合用内径部に対応する接合用外径部と上記傾斜面部に対応する傾斜面部を形成する第2工程と、
上記両金属部材を上記軸方向に合わせ、一対の電極によって上記軸方向に加圧しつつ通電する第3工程とを備え、
上記第2工程では、上記第1金属部材の接合用内径部と上記第2金属部材の接合用外径部が上記軸方向においてラップするように、該接合用外径部の直径を該接合用内径部の直径よりも大きくし、
上記第3工程では、上記第1金属部材の上記接合用内径部の上記傾斜面部側の端部と、上記第2金属部材の上記接合用外径部の上記傾斜面部とは反対側の端部を全周にわたって上記軸方向に当てた状態で、上記加圧及び通電を行ない、
上記加圧及び通電により、上記両金属部材の上記接合用内径部と上記接合用外径部のラップ代部分を塑性流動させて、該両金属部材の上記傾斜面部同士が互いに加圧当接したテーパ嵌合状態になるように、上記第2金属部材を上記第1金属部材の上記開口部に押し込むことを特徴とする。
The metal member joining method disclosed herein includes a first metal member provided with an opening, and an outer peripheral wall part that can partially contact the inner peripheral wall part surrounding the opening part of the first metal member. A method of joining two metal members by resistance heat generation by energization while pressing in the axial direction,
On the inner peripheral wall portion of the first metal member, a joining inner diameter portion having a predetermined inner diameter, and an inclined surface portion inclined so that the inner diameter gradually increases as the distance away from the joining inner diameter portion in the axial direction increases. A first step of forming;
A second step of forming, on the outer peripheral wall portion of the second metal member, an outer diameter portion for bonding corresponding to the inner diameter portion for bonding and an inclined surface portion corresponding to the inclined surface portion;
A third step in which both the metal members are aligned in the axial direction and energized while being pressed in the axial direction by a pair of electrodes;
In the second step, the diameter of the outer diameter portion for bonding is set so that the inner diameter portion for bonding of the first metal member and the outer diameter portion for bonding of the second metal member wrap in the axial direction. Larger than the diameter of the inner diameter part,
In the third step, the end on the inclined surface portion side of the joining inner diameter portion of the first metal member and the end portion on the opposite side of the inclined surface portion of the joining outer diameter portion of the second metal member. Is applied in the axial direction over the entire circumference, the pressure and energization is performed,
By the pressurization and energization, the inner diameter portion for joining and the lap margin portion of the outer diameter portion for joining are plastically flowed, and the inclined surface portions of the two metal members are in pressure contact with each other. The second metal member is pushed into the opening of the first metal member so as to be in a tapered fitting state.

この接合方法によれば、第1金属部材と第2金属部材を軸方向に加圧しつつ通電したとき、両金属部材のラップ代部分が発熱して軟化及び一部溶融を生じ、加圧力によって塑性流動を生ずる。これにより、第2金属部材が第1金属部材の開口部に押し込まれていき、両金属部材の傾斜面部同士は互いに加圧当接したテーパ嵌合状態になる。   According to this joining method, when the first metal member and the second metal member are energized while being pressed in the axial direction, the lap portion of both metal members generates heat, softens and partially melts, and is plasticized by the applied pressure. Causes flow. As a result, the second metal member is pushed into the opening of the first metal member, and the inclined surface portions of both metal members are brought into a taper fitting state in which they are pressed against each other.

すなわち、第1金属部材の内周壁部と第2金属部材の外周壁部の間に、互いの接合用内径部と接合用外径部が塑性流動して接合したリングマッシュ溶接法による接合部と、互いの傾斜面部が加圧当接したテーパ嵌合部とが軸方向に並ぶように設けられた接合構造が得られる。   That is, between the inner peripheral wall portion of the first metal member and the outer peripheral wall portion of the second metal member, the joint portion by the ring mash welding method in which the joint inner diameter portion and the joint outer diameter portion are joined by plastic flow. Thus, a joining structure is obtained in which the tapered fitting portions in which the inclined surface portions are in pressure contact are arranged in the axial direction.

上記通電によって両金属部材に電流が流れる箇所は、互いの接合用内径部と接合用外径部との当接部の1箇所である。従って、従来の2箇所を同時に溶接する(2箇所同時に電流を流す)ケースのような通電抵抗の相違による接合不良や加工精度の問題はなく、生産性向上に有利になる。   The location where current flows through both the metal members by energization is one location of the contact portion between the joining inner diameter portion and the joining outer diameter portion. Therefore, there is no problem of bonding failure or processing accuracy due to a difference in energization resistance as in the case where two conventional locations are welded at the same time (current is supplied simultaneously at two locations), which is advantageous in improving productivity.

そうして、上記第1金属部材と第2金属部材の接合構造体に熱処理変形を多少生じたとしても、両金属部材の傾斜面部は互いに加圧当接したテーパ嵌合状態になっているから、この傾斜面部間に隙間を生ずることが避けられる。従って、当該接合構造体に外力が加わっても、その外力は上記加圧・通電による接合部とテーパ嵌合部とに分散して受けられ、応力集中が避けられる。すなわち、本発明によれば、繰り返しの衝撃にも強い接合構造体が得られる。   Thus, even if heat treatment deformation occurs to some extent in the joined structure of the first metal member and the second metal member, the inclined surface portions of both metal members are in a taper fitting state in which they are pressed against each other. It is possible to avoid a gap between the inclined surface portions. Therefore, even if an external force is applied to the joint structure, the external force is distributed and received in the joint portion and the taper fitting portion by the pressurization / energization, and stress concentration is avoided. That is, according to the present invention, a joined structure that is resistant to repeated impacts can be obtained.

好ましい接合方法では、上記第3工程では、第2金属部材の傾斜面部を第1金属部材の傾斜面部に圧入することにより、該両金属部材を互いの傾斜面部同士を加圧当接したテーパ嵌合状態にする。圧入により、両金属部材の結合が強固になり、当該嵌合部での熱処理変形による隙間の発生も確実に防止される。両金属部材の軸線に対する両金属部材の傾斜面部の傾斜角度は例えば10度以上30度以下にすることが好ましい。   In a preferred joining method, in the third step, the inclined surface portion of the second metal member is press-fitted into the inclined surface portion of the first metal member so that the two metal members are press-contacted with each other. Make a match. By press-fitting, the connection between both metal members is strengthened, and the generation of a gap due to heat treatment deformation at the fitting portion is reliably prevented. It is preferable that the inclination angle of the inclined surface portions of both metal members with respect to the axis of both metal members is, for example, 10 degrees or more and 30 degrees or less.

好ましい接合方法では、上記第1金属部材の上記傾斜面部を上記接合用内径部から上記軸方向に離れた部位に形成し、上記第3工程において、第2金属部材を第1金属部材の開口部に押し込んだときに、該両金属部材の接合用内径部及び接合用外径部による接合部と傾斜面部同士のテーパ嵌合部との間に閉空間が形成されるようにする。   In a preferred joining method, the inclined surface portion of the first metal member is formed at a position away from the joining inner diameter portion in the axial direction, and in the third step, the second metal member is an opening of the first metal member. When the two metal members are pushed in, a closed space is formed between the joining portion formed by the joining inner diameter portion and the joining outer diameter portion and the tapered fitting portion between the inclined surface portions.

リングマッシュ溶接法では、両金属部材のラップ代部分の塑性流動を利用して接合するから、塑性流動した金属の一部が接合部から軸方向の両側にはみ出す。これに対して、上述の如く、上記接合部とテーパ嵌合部の間に閉空間が形成されるようにすると、接合部からはみ出した金属材を閉空間に収容することができ、バリ処理工数を減らすことができる。   In the ring mash welding method, since joining is performed using plastic flow at the lap margin portion of both metal members, a part of the plastic fluidized metal protrudes from both sides in the axial direction from the joint. On the other hand, as described above, if a closed space is formed between the joint and the taper fitting portion, the metal material protruding from the joint can be accommodated in the closed space, and the burr processing man-hours can be accommodated. Can be reduced.

好ましい溶接方法では、上記第1工程及び第2工程において、上記両金属部材各々に、上記軸方向に相対し、第1金属部材の開口部に第2金属部材を押し込んだときに互いに当接することによって該第2金属部材の押込み量を規制するストッパ面を形成しておき、
上記第3工程において、第2金属部材を第1金属部材の開口部に該両金属部材の上記ストッパ面同士が当接するまで押し込むことにより、該両金属部材の上記傾斜面部同士を加圧当接した状態にする。
In a preferred welding method, in the first step and the second step, the metal members are in contact with each other when the second metal member is pushed into the opening of the first metal member so as to be opposed to the axial direction. By forming a stopper surface that restricts the pushing amount of the second metal member by,
In the third step, the second metal member is pressed into the opening of the first metal member until the stopper surfaces of the two metal members come into contact with each other, whereby the inclined surface portions of the two metal members are pressed against each other. To the state.

これにより、第1金属部材の開口部に対する第2金属の押込み量が上記ストッパ面によって定まり、両金属部材の傾斜面同士を確実に加圧当接させるための押込み量のコントロールが容易になる。   Thereby, the pushing amount of the second metal with respect to the opening of the first metal member is determined by the stopper surface, and the pushing amount for reliably bringing the inclined surfaces of the two metal members into pressure contact with each other can be easily controlled.

好ましい実施形態では、上記第2金属部材は、車両用シンクロメッシュ式手動変速機の回転軸に遊転自在に嵌められる変速ギヤであり、上記第1金属部材は、上記回転軸に固定されたクラッチハブに上記変速ギヤを接続するためのハブスリーブがスプライン結合するクラッチギヤである。   In a preferred embodiment, the second metal member is a transmission gear that is freely fitted on a rotation shaft of a vehicle synchromesh manual transmission, and the first metal member is a clutch fixed to the rotation shaft. A hub sleeve for connecting the transmission gear to the hub is a clutch gear to which a spline connection is made.

本発明によれば、第1金属部材と第2金属部材を軸方向に加圧しつつ通電し、両金属部材を接合用内径部と接合用外径部の塑性流動によって接合させたときに、両金属部材の傾斜面部同士が加圧当接したテーパ嵌合部が形成されるようにしたから、テーパ嵌合部によって外力による応力集中が避けられ、繰り返しの衝撃に強い接合構造体が得られ、生産性向上にも有利になる。   According to the present invention, when the first metal member and the second metal member are energized while being pressed in the axial direction, and both metal members are joined by the plastic flow of the joining inner diameter portion and the joining outer diameter portion, Since the tapered fitting part in which the inclined surface parts of the metal member are in pressure contact with each other is formed, stress concentration due to external force is avoided by the taper fitting part, and a joint structure strong against repeated impacts is obtained. It is also advantageous for improving productivity.

本発明の実施形態1に係る金属部材の接合構造体の断面図。Sectional drawing of the joining structure of the metal member which concerns on Embodiment 1 of this invention. 同接合構造体を得る第1及び第2の両金属部材の要部の拡大断面図。The expanded sectional view of the principal part of the 1st and 2nd metal member which obtains the same junction structure. 同両金属部材を加圧及び通電によって接合する状態を示す要部の拡大断面図。The expanded sectional view of the principal part which shows the state which joins both the metal members by pressurization and electricity supply. 同両金属部材の接合構造の要部の拡大断面図。The expanded sectional view of the principal part of the joining structure of the both metal members. 本発明の実施形態2に係る図2と同様の断面図。Sectional drawing similar to FIG. 2 which concerns on Embodiment 2 of this invention. 実施形態2に係る図4と同様の断面図。Sectional drawing similar to FIG. 4 which concerns on Embodiment 2. FIG. 本発明の実施形態3に金属部材の接合構造体の断面図。Sectional drawing of the joining structure of a metal member in Embodiment 3 of this invention. 実施形態3に係る図2と同様の断面図。Sectional drawing similar to FIG. 2 which concerns on Embodiment 3. FIG. 実施形態3に係る図3と同様の断面図。Sectional drawing similar to FIG. 3 which concerns on Embodiment 3. FIG. 実施形態3に係る図4と同様の断面図。Sectional drawing similar to FIG. 4 which concerns on Embodiment 3. FIG. 従来方法による接合構造体の断面図。Sectional drawing of the junction structure by a conventional method.

以下、本発明を実施するための形態を図面に基づいて説明する。以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

<実施形態1>
図1に示すように、本実施形態は、車両用シンクロメッシュ式手動変速機のリング状のクラッチギヤ(第1金属部材)1と変速ギヤ(第2金属部材)2を接合するケースである。クラッチギヤ1及び変速ギヤ2の材質としては、S45C等の炭素鋼やSCM415等の機械構造用合金鋼が好適である。
<Embodiment 1>
As shown in FIG. 1, the present embodiment is a case in which a ring-shaped clutch gear (first metal member) 1 and a transmission gear (second metal member) 2 of a synchromesh manual transmission for a vehicle are joined. As materials for the clutch gear 1 and the transmission gear 2, carbon steel such as S45C or alloy steel for machine structure such as SCM415 is suitable.

変速ギヤ2は、手動変速機の回転軸に遊転自在に嵌められる動力伝達用のギヤである。変速ギヤ2は、歯が螺旋状になったヘリカルギヤであり、その螺旋歯3を有するギヤ部より軸方向に突出した円筒部4の突出端部にクラッチギヤ1が同軸で接合される。上記回転軸にはクラッチハブが該回転軸と一体に回転するように固定される。このクラッチハブにスプライン結合したハブスリーブがシフトレバーの操作によって軸方向にスライドしてクラッチギヤ1のスプライン5にスプライン結合することにより、クラッチハブと変速ギヤ2が接続される。クラッチギヤ1は、ハブスリーブのスライドに伴ってシンクロナイザーリングが嵌まる軸方向に突出した環状コーン部6を備えている。   The transmission gear 2 is a power transmission gear that is freely fitted on the rotating shaft of the manual transmission. The transmission gear 2 is a helical gear with helical teeth, and the clutch gear 1 is coaxially joined to the protruding end portion of the cylindrical portion 4 protruding in the axial direction from the gear portion having the helical teeth 3. A clutch hub is fixed to the rotating shaft so as to rotate integrally with the rotating shaft. The hub sleeve splined to the clutch hub slides in the axial direction by the operation of the shift lever and is splined to the spline 5 of the clutch gear 1, whereby the clutch hub and the transmission gear 2 are connected. The clutch gear 1 includes an annular cone portion 6 protruding in the axial direction in which a synchronizer ring is fitted as the hub sleeve slides.

[金属部材の接合方法]
クラッチギヤ1と変速ギヤ2は、両者を軸方向に加圧しつつ通電による抵抗発熱(ジュール熱)を利用して接合する。
[Method of joining metal parts]
The clutch gear 1 and the transmission gear 2 are joined using resistance heat generation (Joule heat) by energization while pressurizing both in the axial direction.

−第1工程−
図2に示すように、クラッチギヤ(第1金属部材)1の開口部1aを囲む内周壁部に、所定の内径を有する接合用内径部7と嵌合用傾斜面部8を軸方向に間隔をおいて形成する。
-First step-
As shown in FIG. 2, a joining inner diameter portion 7 having a predetermined inner diameter and a fitting inclined surface portion 8 are spaced apart in the axial direction on an inner peripheral wall portion surrounding the opening 1a of the clutch gear (first metal member) 1. And form.

本実施形態では、接合用内径部7と嵌合用傾斜面部8の間に、接合用内径部7よりも径が大きくなった大内径部9を形成している。接合用内径部7と大内径部9の間には、接合用内径部7から大内径部9に向かって内径が漸次拡大した環状傾斜面部10を形成している。嵌合用傾斜面部8は、大内径部9に続いており、接合用内径部7から軸方向に離れる距離が大きくなるに従って内径が漸次拡大するように傾斜している。この嵌合用傾斜面部8は環状に形成されている。クラッチギヤ1の軸線に対する嵌合用傾斜面部8の傾斜角度θは10度以上30度以下である。   In the present embodiment, a large inner diameter portion 9 having a diameter larger than that of the bonding inner diameter portion 7 is formed between the bonding inner diameter portion 7 and the fitting inclined surface portion 8. Between the inner diameter part 7 for bonding and the larger inner diameter part 9, an annular inclined surface part 10 whose inner diameter gradually increases from the inner diameter part 7 for bonding toward the large inner diameter part 9 is formed. The fitting inclined surface portion 8 follows the large inner diameter portion 9 and is inclined so that the inner diameter gradually increases as the distance away from the bonding inner diameter portion 7 in the axial direction increases. The fitting inclined surface portion 8 is formed in an annular shape. The inclination angle θ of the fitting inclined surface portion 8 with respect to the axis of the clutch gear 1 is not less than 10 degrees and not more than 30 degrees.

−第2工程−
図2に示すように、変速ギヤ(第2金属部材)2の円筒部4の外周壁部に、クラッチギヤ1の接合用内径部7に対応する接合用外径部12と、クラッチギヤ1の嵌合用傾斜面部8に対応して内径が漸次拡大するように傾斜した環状の嵌合用傾斜面部13を形成する。接合用外径部12の直径は接合用内径部7の直径よりも大きくする。例えば、接合用外径部12の直径は接合用内径部7の直径よりも0.6mm程度大きくすればよい。これにより、クラッチギヤ1と変速ギヤ2を軸方向に同軸で並べたときに、互いの接合用内径部7と接合用外径部12が当該軸方向においてラップするようにする。同図において符号14はラップ代である。
-Second step-
As shown in FIG. 2, the outer peripheral wall portion of the cylindrical portion 4 of the transmission gear (second metal member) 2 has a joining outer diameter portion 12 corresponding to the joining inner diameter portion 7 of the clutch gear 1, and the clutch gear 1. In correspondence with the fitting inclined surface portion 8, an annular fitting inclined surface portion 13 that is inclined so that the inner diameter gradually increases is formed. The diameter of the outer diameter portion 12 for bonding is made larger than the diameter of the inner diameter portion 7 for bonding. For example, the diameter of the outer diameter portion 12 for bonding may be about 0.6 mm larger than the diameter of the inner diameter portion 7 for bonding. Thus, when the clutch gear 1 and the transmission gear 2 are arranged coaxially in the axial direction, the joining inner diameter portion 7 and the joining outer diameter portion 12 wrap in the axial direction. In the figure, reference numeral 14 denotes a lap margin.

本実施形態では、接合用外径部12はギヤ部側に延長され、その延長端に外径が拡大するように段部15が設けられ、該段部15に嵌合用傾斜面部13が続いている。変速ギヤ2の軸線に対する嵌合用傾斜面部13の傾斜角度θは10度以上30度以下である。また、変速ギヤ2の外周壁部には、接合用外径部12に続いて円筒部4の先端側に外径が漸次小さくなった環状傾斜面部16を形成している。   In the present embodiment, the joining outer diameter portion 12 is extended to the gear portion side, and a step portion 15 is provided at the extended end so that the outer diameter is expanded, and the fitting inclined surface portion 13 follows the step portion 15. Yes. The inclination angle θ of the fitting inclined surface portion 13 with respect to the axis of the transmission gear 2 is not less than 10 degrees and not more than 30 degrees. Further, on the outer peripheral wall portion of the transmission gear 2, an annular inclined surface portion 16 whose outer diameter is gradually reduced is formed on the distal end side of the cylindrical portion 4 following the joining outer diameter portion 12.

変速ギヤ2には、嵌合用傾斜面部13に続いて、クラッチギヤ1の端面と軸方向において相対するストッパ面17を形成している。クラッチギヤ1の端面は、次の第3工程において、変速ギヤ2をクラッチギヤ1の開口部1aに押し込んだとき、変速ギヤ2のストッパ面17と当接することによって、変速ギヤ2の押込み量を規制するストッパ面11を構成している。   The transmission gear 2 is formed with a stopper surface 17 that is opposed to the end surface of the clutch gear 1 in the axial direction, following the fitting inclined surface portion 13. When the transmission gear 2 is pushed into the opening 1a of the clutch gear 1 in the next third step, the end face of the clutch gear 1 is brought into contact with the stopper surface 17 of the transmission gear 2 to thereby reduce the pushing amount of the transmission gear 2. The stopper surface 11 to be regulated is configured.

−第3工程−
図3に示すように、クラッチギヤ1と変速ギヤ2を同軸にして軸方向に合わせ、一対の電極21,22によってクラッチギヤ1と変速ギヤ2を軸方向に加圧しつつ電源装置20を作動させて通電する。
-Third step-
As shown in FIG. 3, the clutch gear 1 and the transmission gear 2 are coaxially aligned with each other in the axial direction, and the power source device 20 is operated while the clutch gear 1 and the transmission gear 2 are pressurized in the axial direction by a pair of electrodes 21 and 22. To energize.

この場合、クラッチギヤ1の接合用内径部7の嵌合用傾斜面部8側の端部である環状傾斜面部10と、変速ギヤ2の接合用外径部12の嵌合用傾斜面部13とは反対側の端部である環状傾斜面部16を全周にわたって上記軸方向に当てた状態にして、上記加圧及び通電を行なう。例えば、約6TONの圧力を加えながら、100〜200KAの通電とすればよい。これにより、クラッチギヤ1の接合用内径部7と変速ギヤ2の接合用外径部12のラップ代部分が抵抗発熱によって軟化及び一部溶融し、加圧力によって塑性流動する。その結果、クラッチギヤ1のストッパ面(端面)11と変速ギヤ2のストッパ面17が当たるまで、変速ギヤ2がクラッチギヤ1の開口部1aに押し込まれていく。   In this case, the annular inclined surface portion 10 which is the end portion on the fitting inclined surface portion 8 side of the joining inner diameter portion 7 of the clutch gear 1 and the fitting inclined surface portion 13 of the joining outer diameter portion 12 of the transmission gear 2 are opposite to each other. The above-described pressurization and energization are performed with the annular inclined surface portion 16 that is the end of the ring-shaped portion 16 applied in the axial direction over the entire circumference. For example, energization of 100 to 200 KA may be performed while applying a pressure of about 6 TON. As a result, the lap margin portion of the joining inner diameter portion 7 of the clutch gear 1 and the joining outer diameter portion 12 of the transmission gear 2 is softened and partially melted by resistance heat generation, and plastically flows by the applied pressure. As a result, the transmission gear 2 is pushed into the opening 1 a of the clutch gear 1 until the stopper surface (end surface) 11 of the clutch gear 1 and the stopper surface 17 of the transmission gear 2 come into contact.

クラッチギヤ1のストッパ面11に変速ギヤ2のストッパ面17が当たる直前に、クラッチギヤ1の嵌合用傾斜面部8が変速ギヤ2の嵌合用傾斜面部13に当接する。そして、上記ストッパ面11にストッパ面17が当たるまで、変速ギヤ2がクラッチギヤ1の開口部1aに押し込まれることにより、変速ギヤ2の嵌合用傾斜面部13がクラッチギヤ1の嵌合用傾斜面部8に圧入される。その後、上記通電を切るとともに、上記加圧を解除する。   Immediately before the stopper surface 17 of the transmission gear 2 hits the stopper surface 11 of the clutch gear 1, the fitting inclined surface portion 8 of the clutch gear 1 contacts the fitting inclined surface portion 13 of the transmission gear 2. The transmission gear 2 is pushed into the opening 1 a of the clutch gear 1 until the stopper surface 17 contacts the stopper surface 11, so that the fitting inclined surface portion 13 of the transmission gear 2 becomes the fitting inclined surface portion 8 of the clutch gear 1. It is press-fitted into. Thereafter, the energization is turned off and the pressurization is released.

これにより、図4に示すように、クラッチギヤ1と変速ギヤ2よりなり、接合用内径部7と接合用外径部12がラップ代部分において接合した接合部23と、嵌合用傾斜面部8と嵌合用傾斜面部13が加圧状態で当接したテーパ嵌合部24とが軸方向に並んだ変速用のギヤ構造体が得られる。   As a result, as shown in FIG. 4, the joint 23 is composed of the clutch gear 1 and the transmission gear 2, the joining inner diameter portion 7 and the joining outer diameter portion 12 are joined at the lap margin portion, and the fitting inclined surface portion 8. A gear structure for shifting is obtained in which the tapered fitting portion 24 with which the fitting inclined surface portion 13 is contacted in a pressurized state is aligned in the axial direction.

また、接合部23とテーパ嵌合部24の間には、クラッチギヤ1の大内径部9及び環状傾斜面部10と、変速ギヤ2の接合用外径部12の延長部12a及び段部15とによって閉空間25が形成される。   Between the joint 23 and the taper fitting portion 24, the large inner diameter portion 9 and the annular inclined surface portion 10 of the clutch gear 1, the extension portion 12 a and the step portion 15 of the outer diameter portion 12 for joining of the transmission gear 2, As a result, a closed space 25 is formed.

上記接合方法において、加圧及び通電を開始したときに電流が流れるのは、クラッチギヤ1の環状傾斜面部10と変速ギヤ2の環状傾斜面部16の接触箇所の1箇所である。従って、当該接触箇所において通電による所期のジュール熱が発生し、上記ラップ代部分での接合(軟化及び塑性流動)が円滑に行なわれる。   In the above joining method, the current flows when pressurization and energization are started at one of the contact points of the annular inclined surface portion 10 of the clutch gear 1 and the annular inclined surface portion 16 of the transmission gear 2. Accordingly, desired Joule heat is generated by energization at the contact location, and the joining (softening and plastic flow) at the lap allowance portion is smoothly performed.

クラッチギヤ1の嵌合用傾斜面部8が変速ギヤ2の嵌合用傾斜面部13に当接するに至ったときは、この当接部でも電流が流れる。しかし、その当接部は比較的広い面接触であり、しかも、電流の一部が流れるに過ぎないから、当該当接部でのジュール熱の発生量は少ない。従って、当該当接部では嵌合用傾斜面部8,13の軟化・溶融を生ずることがない。そのため、変速ギヤ2の嵌合用傾斜面部13がクラッチギヤ1の嵌合用傾斜面部8に確実に圧入された状態になる。なお、クラッチギヤ1の嵌合用傾斜面部8が変速ギヤ2の嵌合用傾斜面部13に当接するに至る前に、接合用の通電を切るようにしてもよい。   When the fitting inclined surface portion 8 of the clutch gear 1 comes into contact with the fitting inclined surface portion 13 of the transmission gear 2, current flows also in this contact portion. However, since the abutting portion has a relatively wide surface contact and only a part of the current flows, the amount of Joule heat generated at the abutting portion is small. Accordingly, the contact inclined portions 8 and 13 do not soften or melt. Therefore, the fitting inclined surface portion 13 of the transmission gear 2 is securely pressed into the fitting inclined surface portion 8 of the clutch gear 1. Note that the energization for joining may be cut off before the fitting inclined surface portion 8 of the clutch gear 1 comes into contact with the fitting inclined surface portion 13 of the transmission gear 2.

また、上述の如く、変速ギヤ2をクラッチギヤ1の開口部1aに、互いのストッパ面11,17同士が当たった状態になるまで押し込むことによって、嵌合用傾斜面部13を嵌合用傾斜面部8に圧入するようにしている。そのため、節度のある圧入になり、その結果、嵌合用傾斜面部8と嵌合用傾斜面部13のテーパ嵌合が確実になる。   Further, as described above, the gear shifting gear 2 is pushed into the opening 1a of the clutch gear 1 until the stopper surfaces 11 and 17 come into contact with each other, whereby the fitting inclined surface portion 13 is brought into the fitting inclined surface portion 8. I try to press fit. Therefore, the press-fitting is moderate, and as a result, the taper fitting between the fitting inclined surface portion 8 and the fitting inclined surface portion 13 is ensured.

また、上記接合において、塑性流動したラップ代部分の金属は接合部23から軸方向の両側にはみ出す。テーパ嵌合部24側にはみ出した金属は、接合部23とテーパ嵌合部24の間の閉空間25に収容されるから、外部にはみ出すことがない。従って、接合部23からテーパ嵌合部24の反対側にはみ出し金属のみを除去すればよく、バリ処理工数を減らすことができる。   Further, in the above-described joining, the plastic-flowing lap margin metal protrudes from the joint 23 to both sides in the axial direction. Since the metal protruding to the taper fitting portion 24 side is accommodated in the closed space 25 between the joint portion 23 and the taper fitting portion 24, the metal does not protrude to the outside. Therefore, it is only necessary to remove the protruding metal from the joint portion 23 to the opposite side of the taper fitting portion 24, and the number of burrs can be reduced.

[変速用ギヤ構造体について]
変速用ギヤ構造体には熱処理(焼入れ及び焼戻し)が行なわれる。この熱処理の結果、クラッチギヤ1の端面11と変速ギヤ2のストッパ面17の間に微小隙間を生ずることがある。しかし、クラッチギヤ1の嵌合用傾斜面部8と変速ギヤ2の嵌合用傾斜面部13は、互いに加圧当接したテーパ嵌合状態になっているため、クラッチギヤ1及び変速ギヤ2に多少の熱処理変形があったとしても、嵌合用傾斜面部8と嵌合用傾斜面部13の間に隙間を生ずることは避けられる。
[About gear structure for gear shifting]
The transmission gear structure is subjected to heat treatment (quenching and tempering). As a result of this heat treatment, a minute gap may be formed between the end face 11 of the clutch gear 1 and the stopper face 17 of the transmission gear 2. However, since the fitting inclined surface portion 8 of the clutch gear 1 and the fitting inclined surface portion 13 of the transmission gear 2 are in a taper fitting state in which they are pressed against each other, the clutch gear 1 and the transmission gear 2 are subjected to some heat treatment. Even if there is a deformation, it is possible to avoid a gap between the fitting inclined surface portion 8 and the fitting inclined surface portion 13.

従って、変速の際にクラッチペダルの踏み込みが甘い状態でシフトレバーが操作された場合でも、接合部23の一端(テーパ嵌合部24側の端)に応力集中を生ずること、すなわち、クラックが入ることが避けられる。この点を説明すると、この場合、ハブスリーブのスプラインがクラッチギヤ1のスプライン4に噛み合う際に、該クラッチギヤ1に大きな衝撃が加わる。しかし、クラッチギヤ1と変速ギヤ2は、接合部23で接合されているだけでなく、テーパ嵌合部24で面接触しているため、衝撃荷重は接合部23とテーパ嵌合部24に分散される。そのため、接合部23の一端に大きな衝撃荷重が入力されることがなく、上記のようなシフトレバーの操作が繰り返されても、接合部23の一端からクラッチギヤ1又は変速ギヤ2にクラックが入ることが避けられる。   Accordingly, even when the shift lever is operated with the clutch pedal being depressed at the time of shifting, stress concentration occurs at one end of the joint portion 23 (the end on the taper fitting portion 24 side), that is, cracks occur. Can be avoided. Explaining this point, in this case, when the spline of the hub sleeve meshes with the spline 4 of the clutch gear 1, a large impact is applied to the clutch gear 1. However, since the clutch gear 1 and the transmission gear 2 are not only joined at the joint portion 23 but also in surface contact at the taper fitting portion 24, the impact load is distributed to the joint portion 23 and the taper fitting portion 24. Is done. Therefore, a large impact load is not input to one end of the joint 23, and even if the shift lever is repeatedly operated as described above, the clutch gear 1 or the transmission gear 2 cracks from one end of the joint 23. Can be avoided.

<実施形態2>
本実施形態を図5及び図6に基いて説明する。本実施形態は、クラッチギヤ1の嵌合用傾斜面部8及び変速ギヤ2の嵌合用傾斜面部13の位置が実施形態1と異なる。
<Embodiment 2>
This embodiment will be described with reference to FIGS. In the present embodiment, the positions of the fitting inclined surface portion 8 of the clutch gear 1 and the fitting inclined surface portion 13 of the transmission gear 2 are different from those of the first embodiment.

図5に示すように、クラッチギヤ1の内周壁部には、実施形態1と同じく、接合用内径部7、環状傾斜面部10及び大内径部9が軸方向において順に形成されている。しかし、実施形態1とは違って、第1工程では、大内径部9に続くようにストッパ面11を形成し、このストッパ面11に続くように嵌合用傾斜面部8を形成するようにしている。   As shown in FIG. 5, the inner peripheral wall portion of the clutch gear 1 is formed with a joining inner diameter portion 7, an annular inclined surface portion 10, and a large inner diameter portion 9 in order in the axial direction as in the first embodiment. However, unlike the first embodiment, in the first step, the stopper surface 11 is formed so as to continue to the large inner diameter portion 9, and the fitting inclined surface portion 8 is formed so as to continue to the stopper surface 11. .

このクラッチギヤ1の嵌合用傾斜面部8及びストッパ面の配置に対応して、変速ギヤ2の外周壁部においても、第2工程では、接合用外径部12の延長部12aの端に続くようにストッパ面17を形成し、このストッパ面17に続くように嵌合用傾斜面部13を形成するようにしている。   Corresponding to the arrangement of the fitting inclined surface portion 8 and the stopper surface of the clutch gear 1, the outer peripheral wall portion of the transmission gear 2 also continues to the end of the extension portion 12 a of the joining outer diameter portion 12 in the second step. A stopper surface 17 is formed on the surface, and a fitting inclined surface portion 13 is formed so as to follow the stopper surface 17.

第3工程は、実施形態1と同様に行なうことができる。すなわち、クラッチギヤ1と変速ギヤ2を同軸にして、クラッチギヤ1の環状傾斜面部10と変速ギヤ2の環状傾斜面部16を全周にわたって上記軸方向に当てた状態にする。その状態で、一対の電極によってクラッチギヤ1と変速ギヤ2を軸方向に加圧しつつ通電する。   The third step can be performed in the same manner as in the first embodiment. That is, the clutch gear 1 and the transmission gear 2 are coaxial, and the annular inclined surface portion 10 of the clutch gear 1 and the annular inclined surface portion 16 of the transmission gear 2 are brought into contact with each other in the axial direction over the entire circumference. In this state, the clutch gear 1 and the transmission gear 2 are energized while being pressurized in the axial direction by a pair of electrodes.

これにより、クラッチギヤ1の接合用内径部7と変速ギヤ2の接合用外径部12のラップ代部分が抵抗発熱によって軟化及び一部溶融し、加圧力によって塑性流動する。そして、クラッチギヤ1のストッパ面11に変速ギヤ2のストッパ面17が当たるまで、変速ギヤ2がクラッチギヤ1の開口部1aに押し込まれていく。   As a result, the lap margin portion of the joining inner diameter portion 7 of the clutch gear 1 and the joining outer diameter portion 12 of the transmission gear 2 is softened and partially melted by resistance heat generation, and plastically flows by the applied pressure. The transmission gear 2 is pushed into the opening 1 a of the clutch gear 1 until the stopper surface 17 of the transmission gear 2 contacts the stopper surface 11 of the clutch gear 1.

その結果、図6に示すように、クラッチギヤ1の接合用内径部7と変速ギヤ2の接合用外径部12がラップ代部分において接合した接合部23と、嵌合用傾斜面部8と嵌合用傾斜面部13が加圧状態で当接したテーパ嵌合部24とを有する変速用のギヤ構造体が得られる。また、接合部23とテーパ嵌合部24の間に、クラッチギヤ1の大内径部9及び環状傾斜面部10と、変速ギヤ2の接合用外径部12の延長部12a及びストッパ面17とによって閉空間25が形成される。   As a result, as shown in FIG. 6, the joining inner diameter portion 7 of the clutch gear 1 and the joining outer diameter portion 12 of the transmission gear 2 are joined at the lap margin portion, the fitting inclined surface portion 8 and the fitting inclined surface portion 8. A gear structure for transmission having the tapered fitting portion 24 with which the inclined surface portion 13 abuts in a pressurized state is obtained. Further, between the joint portion 23 and the taper fitting portion 24, the large inner diameter portion 9 and the annular inclined surface portion 10 of the clutch gear 1, and the extension portion 12 a and the stopper surface 17 of the outer diameter portion 12 for joining of the transmission gear 2. A closed space 25 is formed.

よって、本実施形態においても、実施形態1と同様の効果が得られる。   Therefore, also in this embodiment, the same effect as Embodiment 1 is acquired.

<実施形態3>
図7に示すように、本実施形態はリングギヤ(第1金属部材)31とデフケース(第2金属部材)32を接合するケースである。デフケース32は、ディファレンシャル機構のピニオンギアやサイドギアを収納するケースであり、その材質としてはFCD450やFCD550等の球状黒鉛鋳鉄が好適である。リングギア31は、変速機から伝達される駆動力を受けるギア部品であり、その材質としては、SCR420H等の浸炭焼入れ鋼が好適である。
<Embodiment 3>
As shown in FIG. 7, the present embodiment is a case in which a ring gear (first metal member) 31 and a differential case (second metal member) 32 are joined. The differential case 32 is a case that houses a pinion gear and a side gear of a differential mechanism, and the material thereof is preferably spheroidal graphite cast iron such as FCD450 or FCD550. The ring gear 31 is a gear part that receives the driving force transmitted from the transmission, and a carburized and hardened steel such as SCR420H is preferable as the material thereof.

−第1工程−
図8に示すように、リングギヤ31の開口部31aを囲む内周壁部に、実施形態1と同様に、所定の内径を有する接合用内径部33と環状の嵌合用傾斜面部34を軸方向に間隔をおいて形成し、接合用内径部33と嵌合用傾斜面部34の間に、接合用内径部33よりも径が大きくなった大内径部35を形成し、接合用内径部33と大内径部35の間に、環状傾斜面部36を形成する。リングギヤ31の軸線に対する嵌合用傾斜面部34の傾斜角度θは10度以上30度以下である。このリングギヤ31はその端面をストッパ面37としている。
-First step-
As shown in FIG. 8, the inner peripheral wall portion surrounding the opening 31 a of the ring gear 31 is spaced apart in the axial direction between the joining inner diameter portion 33 having a predetermined inner diameter and the annular fitting inclined surface portion 34 as in the first embodiment. A large inner diameter portion 35 having a diameter larger than that of the bonding inner diameter portion 33 is formed between the bonding inner diameter portion 33 and the fitting inclined surface portion 34, and the bonding inner diameter portion 33 and the large inner diameter portion are formed. An annular inclined surface portion 36 is formed between 35. The inclination angle θ of the fitting inclined surface portion 34 with respect to the axis of the ring gear 31 is not less than 10 degrees and not more than 30 degrees. The ring gear 31 has an end surface as a stopper surface 37.

−第2工程−
図8に示すように、デフケース32の外周壁部に、リングギヤ31の接合用内径部33及び嵌合用傾斜面部34に対応する接合用外径部41及び環状の嵌合用傾斜面部42を形成する。接合用外径部41の直径は接合用内径部33の直径よりも大きくし、接合用内径部33と接合用外径部41が軸方向においてラップするようにする(ラップ代43)。実施形態1と同じく、接合用外径部41の延長部の端に段部44を介して嵌合用傾斜面部42が続いている。デフケース32の軸線に対する嵌合用傾斜面部42の傾斜角度θは10度以上30度以下である。デフケース32の外周壁部には、接合用外径部41に続いて外径が漸次小さくなった環状傾斜面部45を形成している。
-Second step-
As shown in FIG. 8, a joining outer diameter portion 41 and an annular fitting inclined surface portion 42 corresponding to the joining inner diameter portion 33 and the fitting inclined surface portion 34 of the ring gear 31 are formed on the outer peripheral wall portion of the differential case 32. The diameter of the bonding outer diameter portion 41 is larger than the diameter of the bonding inner diameter portion 33 so that the bonding inner diameter portion 33 and the bonding outer diameter portion 41 wrap in the axial direction (wrap allowance 43). As in the first embodiment, the fitting inclined surface portion 42 continues to the end of the extension portion of the joining outer diameter portion 41 via the step portion 44. The inclination angle θ of the fitting inclined surface portion 42 with respect to the axis of the differential case 32 is not less than 10 degrees and not more than 30 degrees. On the outer peripheral wall portion of the differential case 32, an annular inclined surface portion 45 having an outer diameter gradually decreasing is formed following the joining outer diameter portion 41.

デフケース32には、嵌合用傾斜面部42に続いて、リングギヤ31のストッパ面37と軸方向において相対し、第3工程におけるデフケース32の押込み量を規制するストッパ面46を形成している。   The differential case 32 is formed with a stopper surface 46 that faces the stopper surface 37 of the ring gear 31 in the axial direction and restricts the pushing amount of the differential case 32 in the third step, following the fitting inclined surface portion 42.

−第3工程−
図9に示すように、リングギヤ31とデフケース32を同軸にして軸方向に合わせる。すなわち、リングギヤ31の環状傾斜面部36とデフケース32の環状傾斜面部45を全周にわたって当てた状態にする。その状態で、一対の電極51,52によってリングギヤ31とデフケース32を軸方向に加圧しつつ通電する。これにより、リングギヤ31の接合用内径部33とデフケース32の接合用外径部41のラップ代部分が抵抗発熱によって軟化及び一部溶融して塑性流動を起こす。その結果、リングギヤ31のストッパ面37にデフケース32のストッパ面46が当たるまで、デフケース32がリングギヤ31の開口部31aに押し込まれていく。
-Third step-
As shown in FIG. 9, the ring gear 31 and the differential case 32 are coaxially aligned with each other in the axial direction. That is, the annular inclined surface portion 36 of the ring gear 31 and the annular inclined surface portion 45 of the differential case 32 are brought into contact with each other over the entire circumference. In this state, the ring gear 31 and the differential case 32 are energized while being pressed in the axial direction by the pair of electrodes 51 and 52. As a result, the lap portion of the joining inner diameter portion 33 of the ring gear 31 and the joining outer diameter portion 41 of the differential case 32 is softened and partially melted by resistance heat generation to cause plastic flow. As a result, the differential case 32 is pushed into the opening 31 a of the ring gear 31 until the stopper surface 46 of the differential case 32 contacts the stopper surface 37 of the ring gear 31.

これにより、図10に示すように、リングギヤ31の接合用内径部33とデフケース32の接合用外径部41がラップ代部分において接合した接合部47と、嵌合用傾斜面部34と嵌合用傾斜面部42が加圧状態で当接したテーパ嵌合部48とを有するリングギヤ付デフケースが得られる。また、接合部47とテーパ嵌合部48の間に、リングギヤ31の嵌合用傾斜面部34の延長部、大内径部35及び環状傾斜面部36と、デフケース32の接合用外径部41の延長部41a及び段部44とによって閉空間49が形成される。   As a result, as shown in FIG. 10, a joining portion 47 in which the joining inner diameter portion 33 of the ring gear 31 and the joining outer diameter portion 41 of the differential case 32 are joined at the lap margin portion, the fitting inclined surface portion 34, and the fitting inclined surface portion. A differential case with a ring gear having a taper fitting portion 48 with which 42 abuts in a pressurized state is obtained. Further, between the joint portion 47 and the taper fitting portion 48, an extension portion of the fitting inclined surface portion 34 of the ring gear 31, a large inner diameter portion 35 and an annular inclined surface portion 36, and an extension portion of the joint outer diameter portion 41 of the differential case 32. A closed space 49 is formed by 41 a and the stepped portion 44.

よって、本実施形態においても、実施形態1と同様の効果が得られる。   Therefore, also in this embodiment, the same effect as Embodiment 1 is acquired.

リングギヤ31とデフケース32を接合するケースにおいても、実施形態2と同じく、嵌合用傾斜面部34,42によるテーパ嵌合部48とストッパ面37,48によるストッパ部の位置を軸方向において逆にすることができる。   Also in the case where the ring gear 31 and the differential case 32 are joined, as in the second embodiment, the positions of the tapered fitting portion 48 by the fitting inclined surface portions 34 and 42 and the stopper portion by the stopper surfaces 37 and 48 are reversed in the axial direction. Can do.

1 クラッチギヤ(第1金属部材)
1a 開口部
2 変速ギヤ(第2金属部材)
7 接合用内径部
8 嵌合用傾斜面部
11 ストッパ面
12 接合用外径部
13 嵌合用傾斜面部
14 ラップ代
17 ストッパ面
23 接合部
24 テーパ嵌合部
25 閉空間
31 リングギヤ(第1金属部材)
31a 開口部
32 デフケース(第2金属部材)
33 接合用内径部
34 嵌合用傾斜面部
37 ストッパ面
41 接合用外径部
42 嵌合用傾斜面部
46 ストッパ面
47 接合部
48 テーパ嵌合部
49 閉空間
1 Clutch gear (first metal member)
1a Opening 2 Transmission gear (second metal member)
DESCRIPTION OF SYMBOLS 7 Inner diameter part 8 Fitting inclined surface part 11 Stopper surface 12 Joining outer diameter part 13 Fitting inclined surface part 14 Lapping allowance 17 Stopper surface 23 Joining part 24 Taper fitting part 25 Closed space 31 Ring gear (1st metal member)
31a Opening 32 Differential case (second metal member)
33 Inner diameter portion for joining 34 Inclined surface portion for fitting 37 Stopper surface 41 Outer diameter portion for joining 42 Inclined surface portion for fitting 46 Stopper surface 47 Joining portion 48 Taper fitting portion 49 Closed space

Claims (9)

開口部が設けられた第1金属部材と、該第1金属部材の当該開口部を囲む内周壁部に部分的に接触可能な外周壁部を有する第2金属部材とを、軸方向に加圧しつつ通電による抵抗発熱によって接合する方法であって、
上記第1金属部材の内周壁部に、所定の内径を有する接合用内径部と、該接合用内径部から軸方向に離れる距離が大きくなるに従って内径が漸次拡大するように傾斜した傾斜面部とを形成する第1工程と、
上記第2金属部材の外周壁部に、上記接合用内径部に対応する接合用外径部と上記傾斜面部に対応する傾斜面部を形成する第2工程と、
上記両金属部材を上記軸方向に合わせ、一対の電極によって上記軸方向に加圧しつつ通電する第3工程とを備え、
上記第2工程では、上記第1金属部材の接合用内径部と上記第2金属部材の接合用外径部が上記軸方向においてラップするように、該接合用外径部の直径を該接合用内径部の直径よりも大きくし、
上記第3工程では、上記第1金属部材の上記接合用内径部の上記傾斜面部側の端部と、上記第2金属部材の上記接合用外径部の上記傾斜面部とは反対側の端部を全周にわたって上記軸方向に当てた状態で、上記加圧及び通電を行ない、
上記加圧及び通電により、上記両金属部材の上記接合用内径部と上記接合用外径部のラップ代部分を塑性流動させて、該両金属部材の上記傾斜面部同士が互いに加圧当接したテーパ嵌合状態になるように、上記第2金属部材を上記第1金属部材の上記開口部に押し込むことを特徴とする金属部材の接合方法。
A first metal member provided with an opening and a second metal member having an outer peripheral wall that can partially contact the inner peripheral wall surrounding the opening of the first metal member are pressurized in the axial direction. While joining by resistance heating by energization,
On the inner peripheral wall portion of the first metal member, a joining inner diameter portion having a predetermined inner diameter, and an inclined surface portion inclined so that the inner diameter gradually increases as the distance away from the joining inner diameter portion in the axial direction increases. A first step of forming;
A second step of forming, on the outer peripheral wall portion of the second metal member, an outer diameter portion for bonding corresponding to the inner diameter portion for bonding and an inclined surface portion corresponding to the inclined surface portion;
A third step in which both the metal members are aligned in the axial direction and energized while being pressed in the axial direction by a pair of electrodes;
In the second step, the diameter of the outer diameter portion for bonding is set so that the inner diameter portion for bonding of the first metal member and the outer diameter portion for bonding of the second metal member wrap in the axial direction. Larger than the diameter of the inner diameter part,
In the third step, the end on the inclined surface portion side of the joining inner diameter portion of the first metal member and the end portion on the opposite side of the inclined surface portion of the joining outer diameter portion of the second metal member. Is applied in the axial direction over the entire circumference, the pressure and energization is performed,
By the pressurization and energization, the inner diameter portion for joining and the lap margin portion of the outer diameter portion for joining are plastically flowed, and the inclined surface portions of the two metal members are in pressure contact with each other. The metal member joining method, wherein the second metal member is pushed into the opening of the first metal member so as to be in a taper fitting state.
請求項1において、
上記第3工程では、上記第2金属部材の上記傾斜面部を上記第1金属部材の上記傾斜面部に圧入することにより、該両金属部材を互いの傾斜面部同士が加圧当接したテーパ嵌合状態にすることを特徴とする金属部材の接合方法。
In claim 1,
In the third step, the inclined surface portion of the second metal member is press-fitted into the inclined surface portion of the first metal member, whereby the two metal members are press-fitted to each other by the inclined surface portions. A method for joining metal members, characterized in that the metal member is in a state.
請求項1又は請求項2において、
上記第1金属部材の上記傾斜面部を上記接合用内径部から上記軸方向に離れた部位に形成し、
上記第3工程において、上記第2金属部材を上記第1金属部材の上記開口部に押し込んだときに、上記両金属部材の上記接合用内径部及び上記接合用外径部による接合部と上記傾斜面部同士のテーパ嵌合部との間に閉空間が形成されるようにすることを特徴とする金属部材の接合方法。
In claim 1 or claim 2,
Forming the inclined surface portion of the first metal member in a portion away from the joining inner diameter portion in the axial direction;
In the third step, when the second metal member is pushed into the opening of the first metal member, the joint portion and the slope formed by the joining inner diameter portion and the joining outer diameter portion of the both metal members. A method for joining metal members, characterized in that a closed space is formed between the taper fitting portions of the surface portions.
請求項1乃至請求項3のいずれか一において、
上記第1工程及び第2工程において、上記両金属部材各々に、上記軸方向に相対し、上記第1金属部材の上記開口部に上記第2金属部材を押し込んだときに違いに当接することによって該第2金属部材の押込み量を規制するストッパ面を形成しておき、
上記第3工程において、上記第2金属部材を上記第1金属部材の上記開口部に該両金属部材の上記ストッパ面同士が当接するまで押し込むことにより、該両金属部材の上記傾斜面部同士を加圧当接した状態にすることを特徴とする金属部材の接合方法。
In any one of Claim 1 thru | or 3,
In the first step and the second step, the two metal members are in contact with each other in a difference when the second metal member is pushed into the opening of the first metal member, relative to the axial direction. Forming a stopper surface for regulating the pushing amount of the second metal member;
In the third step, the second metal member is pushed into the opening of the first metal member until the stopper surfaces of the two metal members come into contact with each other, thereby adding the inclined surface portions of the two metal members to each other. A method for joining metal members, wherein the metal members are brought into pressure contact.
請求項1乃至請求項4のいずれか一において、
上記第2金属部材は、車両用シンクロメッシュ式手動変速機の回転軸に遊転自在に嵌められる変速ギヤであり、
上記第1金属部材は、上記回転軸に固定されたクラッチハブに上記変速ギヤを接続するためのハブスリーブがスプライン結合するクラッチギヤであることを特徴とする金属部材の接合方法。
In any one of Claims 1 thru | or 4,
The second metal member is a transmission gear that is freely fitted on a rotating shaft of a vehicle synchromesh manual transmission,
The metal member joining method according to claim 1, wherein the first metal member is a clutch gear in which a hub sleeve for connecting the transmission gear to a clutch hub fixed to the rotating shaft is spline-coupled.
開口部が設けられた第1金属部材の該開口部を囲む内周壁部と第2金属部材の外周壁部の接合構造であって、
上記第1金属部材の内周壁部と上記第2金属部材の外周壁部の間に、該内周壁部と外周壁部の塑性流動によって接合した接合部と、該内周壁部の傾斜面と外周壁部の傾斜面が加圧状態で当接したテーパ嵌合部とが、軸方向に並ぶように設けられていることを特徴とする金属部材の接合構造。
A joining structure of an inner peripheral wall portion surrounding the opening portion of the first metal member provided with the opening portion and an outer peripheral wall portion of the second metal member,
Between the inner peripheral wall portion of the first metal member and the outer peripheral wall portion of the second metal member, a joint portion joined by plastic flow of the inner peripheral wall portion and the outer peripheral wall portion, an inclined surface and an outer periphery of the inner peripheral wall portion A joining structure of metal members, characterized in that a tapered fitting portion in which an inclined surface of a wall portion abuts in a pressurized state is provided so as to be aligned in the axial direction.
請求項6において、
上記第1金属部材と上記第2金属部材に、該両金属部材の軸方向において互いに当接したストッパ面を備えていることを特徴とする金属部材の接合構造。
In claim 6,
A metal member joining structure, wherein the first metal member and the second metal member are provided with stopper surfaces that are in contact with each other in the axial direction of the two metal members.
請求項6又は請求項7において、
上記接合部と上記テーパ嵌合部の間に閉空間が形成されていることを特徴とする金属部材の接合構造。
In claim 6 or claim 7,
A metal member bonding structure, wherein a closed space is formed between the bonding portion and the taper fitting portion.
請求項6乃至請求項8のいずれか一において、
上記第2金属部材は、車両用シンクロメッシュ式手動変速機の回転軸に遊転自在に嵌められる変速ギヤであり、
上記第1金属部材は、上記変速ギヤを上記回転軸に固定されたクラッチハブに接続するためのハブスリーブがスプライン結合するクラッチギヤであることを特徴とする金属部材の接合構造。
In any one of Claims 6 thru | or 8,
The second metal member is a transmission gear that is freely fitted on a rotating shaft of a vehicle synchromesh manual transmission,
The metal member joining structure according to claim 1, wherein the first metal member is a clutch gear in which a hub sleeve for connecting the transmission gear to a clutch hub fixed to the rotating shaft is splined.
JP2015098468A 2015-05-13 2015-05-13 Metal member joining method and metal member joining structure Expired - Fee Related JP6119795B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015098468A JP6119795B2 (en) 2015-05-13 2015-05-13 Metal member joining method and metal member joining structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015098468A JP6119795B2 (en) 2015-05-13 2015-05-13 Metal member joining method and metal member joining structure

Publications (2)

Publication Number Publication Date
JP2016209926A JP2016209926A (en) 2016-12-15
JP6119795B2 true JP6119795B2 (en) 2017-04-26

Family

ID=57551100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015098468A Expired - Fee Related JP6119795B2 (en) 2015-05-13 2015-05-13 Metal member joining method and metal member joining structure

Country Status (1)

Country Link
JP (1) JP6119795B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110653468A (en) * 2018-06-29 2020-01-07 本田技研工业株式会社 Joining device and joining method
KR20220087574A (en) * 2020-06-02 2022-06-24 가부시키가이샤 오리진 Manufacturing method and manufacturing apparatus of joined article

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6873777B2 (en) * 2017-03-28 2021-05-19 本田技研工業株式会社 How to join metal members
KR101837071B1 (en) 2017-09-13 2018-03-09 정연택 Methode of flywheel for engines
JP7003520B2 (en) * 2017-09-19 2022-01-20 富士フイルムビジネスイノベーション株式会社 Rotating member and image forming device
DE112018005742T5 (en) * 2018-01-05 2020-07-16 Hitachi Automotive Systems, Ltd. ELEMENT THAT HAS A STRUCTURE FOR COUPLING TWO OR MORE COMPONENTS, FUEL INJECTION VALVE AND METHOD FOR COUPLING TWO OR MORE COMPONENTS
JP6643759B2 (en) * 2018-03-23 2020-02-12 株式会社オリジン Fitting member, annular member, joined member, and method of manufacturing joined member
JP2021016862A (en) 2019-07-17 2021-02-15 マツダ株式会社 Metallic member joining method and joint structure
JP6882581B1 (en) * 2020-06-02 2021-06-02 株式会社オリジン Manufacturing method and manufacturing equipment for joined articles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04187388A (en) * 1990-11-20 1992-07-06 Toyota Motor Corp Friction welding method for different kinds of metallic pipes
JP3400176B2 (en) * 1995-03-29 2003-04-28 シグマ株式会社 Method of manufacturing valve lifter for internal combustion engine
JP3752866B2 (en) * 1998-09-29 2006-03-08 マツダ株式会社 Joining metal member joining method
JP5234505B2 (en) * 2008-09-22 2013-07-10 マツダ株式会社 Method and apparatus for joining metal members
JP5512395B2 (en) * 2010-05-27 2014-06-04 マツダ株式会社 Method for joining metal members

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110653468A (en) * 2018-06-29 2020-01-07 本田技研工业株式会社 Joining device and joining method
KR20220087574A (en) * 2020-06-02 2022-06-24 가부시키가이샤 오리진 Manufacturing method and manufacturing apparatus of joined article
KR102444935B1 (en) * 2020-06-02 2022-09-19 가부시키가이샤 오리진 Manufacturing method and manufacturing apparatus of joined article

Also Published As

Publication number Publication date
JP2016209926A (en) 2016-12-15

Similar Documents

Publication Publication Date Title
JP6119795B2 (en) Metal member joining method and metal member joining structure
JP5399206B2 (en) Metal member joining method and metal joined body
US10060482B2 (en) Joint-site design comprising a hub and a shaft or a gear being friction welded
JP5512395B2 (en) Method for joining metal members
JP5614054B2 (en) Beam welding member and differential device provided with the same
JP2011167746A (en) Beam-welded member and differential gear equipped with the same
EP3116676B1 (en) Method of manufacturing a gear by upsetting parts into groove provided therein
JP5136184B2 (en) Method for joining metal members
JP4998027B2 (en) Friction spot welding method
JP2010207850A (en) Welding joining member and welding joining method
JP2005288525A (en) Spot welding method of different kind of metallic member
JP2009103210A (en) Power transmission shaft and power transmission device
JP5234505B2 (en) Method and apparatus for joining metal members
GB2243665A (en) Hub part for a clutch disc and method of production
JP2009097716A (en) Differential gear
JP2013034998A (en) Method for manufacturing power transmission device
US20180142771A1 (en) System of components having wire weld joint and a method of joining a system of components including a cast iron component
CN107914094A (en) Improve the device of welding uniformity
JP2011047420A (en) Welded and joined part and method of welding and joining
JP2008272818A (en) Friction welding structure and axle-housing
CN110919150B (en) Method for fastening a torque transmission element to a hub
JP2013022633A (en) Method for manufacturing power transmission device
JP2018089657A (en) Heterogeneous member joining method
JP2017070995A (en) Method for joining heterogeneous metal plate and component for joining heterogeneous metal plate
JP4453506B2 (en) Friction spot welding method

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170228

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170313

R150 Certificate of patent or registration of utility model

Ref document number: 6119795

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees