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JP5136184B2 - Method for joining metal members - Google Patents

Method for joining metal members Download PDF

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Publication number
JP5136184B2
JP5136184B2 JP2008111637A JP2008111637A JP5136184B2 JP 5136184 B2 JP5136184 B2 JP 5136184B2 JP 2008111637 A JP2008111637 A JP 2008111637A JP 2008111637 A JP2008111637 A JP 2008111637A JP 5136184 B2 JP5136184 B2 JP 5136184B2
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joining
gear
metal member
contact
metal
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JP2009262164A (en
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信弥 奥村
晃 橋本
大輔 藤井
和治 高谷
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Mazda Motor Corp
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Mazda Motor Corp
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Description

本発明は、所定厚みの本体部およびそこから厚み方向に突出する円筒部を有した第1金属部材と、この第1金属部材の円筒部が挿入される嵌合孔を有した第2金属部材とを、通電による抵抗熱で接合する方法に関する。   The present invention provides a first metal member having a main body portion having a predetermined thickness and a cylindrical portion protruding from the main body portion, and a second metal member having a fitting hole into which the cylindrical portion of the first metal member is inserted. Are connected to each other by resistance heat by energization.

従来、下記特許文献1に示されるように、変速機用のメインギアにシンクロ用のクラッチギアを挿入して、電子ビーム溶接により一体化する変速機用歯車の製造方法において、上記電気ビーム溶接の前に、上記クラッチギアの歯部に近い部分を電気抵抗スポット溶接によってメインギアに接合しておくことが行われている。   Conventionally, as shown in Patent Document 1 below, in a method of manufacturing a transmission gear in which a synchronization clutch gear is inserted into a transmission main gear and integrated by electron beam welding, Previously, a portion near the tooth portion of the clutch gear is joined to the main gear by electric resistance spot welding.

この特許文献1に開示された方法によれば、電子ビーム溶接を行うよりも前に、クラッチギアの歯部に近い部分が電気抵抗溶接により接合されるため、その後に電子ビーム溶接を行う際にクラッチギアの歯部に歪や反りが生じることが防止され、溶接後の寸法精度が十分に確保される等の利点がある。
特開2004−11816号公報
According to the method disclosed in Patent Document 1, since the portion near the tooth portion of the clutch gear is joined by electric resistance welding before performing electron beam welding, when performing electron beam welding thereafter. There are advantages such as preventing distortion and warping of the teeth of the clutch gear and ensuring sufficient dimensional accuracy after welding.
JP 2004-11816 A

しかしながら、電気抵抗溶接と電子ビーム溶接とを併用する上記特許文献1の方法では、2つの工程に分けて溶接を行う必要があるため、生産効率の低下が避けられないという問題がある。また、電気抵抗溶接および電子ビーム溶接を行うための2種類の溶接設備が必要なため、設備費が増大するという問題もある。   However, in the method of Patent Document 1 in which both electric resistance welding and electron beam welding are used, since it is necessary to perform welding in two steps, there is a problem that reduction in production efficiency is inevitable. Moreover, since two types of welding equipment for performing electric resistance welding and electron beam welding are required, there is also a problem that equipment costs increase.

本発明は、上記のような事情に鑑みてなされたものであり、寸法精度や接合強度を十分に確保しつつ、より効率よく接合を行うことが可能な金属部材の接合方法を提供することを目的とする。   This invention is made | formed in view of the above situations, and provides the joining method of the metal member which can perform joining more efficiently, ensuring sufficient dimensional accuracy and joining strength. Objective.

上記課題を解決するためのものとして、本発明は、所定厚みの本体部およびそこから厚み方向に突出する円筒部を有した第1金属部材と、この第1金属部材の円筒部が挿入される嵌合孔を有した第2金属部材とを、通電による抵抗熱で接合する方法であって、上記第1金属部材の本体部の壁面およびこれと対向する第2金属部材の対向面のうちのいずれか一方に、所定高さの突起部を設ける工程と、上記第1金属部材の円筒部を上記第2金属部材の嵌合孔に挿入して両者の各周面どうしを接触させるとともに、上記突起部を相手側の対向面に当接させる工程と、この状態で上記第1および第2の金属部材を接近方向に加圧しつつ通電することにより、上記突起部と相手側の対向面との接触部を接合するとともに、上記円筒部および嵌合孔の各周面どうしの接触部を接合する工程とを含むことを特徴とするものである(請求項1)。   In order to solve the above problems, the present invention inserts a first metal member having a main body portion having a predetermined thickness and a cylindrical portion protruding from the main body portion in the thickness direction, and the cylindrical portion of the first metal member. A method of joining a second metal member having a fitting hole by resistance heat by energization, wherein the wall surface of the main body portion of the first metal member and the opposing surface of the second metal member facing this A step of providing a protrusion with a predetermined height on either one, the cylindrical portion of the first metal member is inserted into the fitting hole of the second metal member, and the peripheral surfaces of both are brought into contact with each other; The step of bringing the protruding portion into contact with the opposing surface of the mating side, and in this state, by energizing the first and second metal members while pressing in the approaching direction, the protruding portion and the opposing surface of the mating side While joining the contact portion, each of the cylindrical portion and the fitting hole It is characterized in that a step of joining the contact portions of the face with each other (Claim 1).

本発明によれば、第1金属部材の円筒部を第2金属部材の嵌合孔に挿入して両者の各周面どうしを接触させ、かつ上記第1および第2の金属部材のいずれか一方に設けられた突起部を相手側の対向面に当接させた状態で通電を行うことにより、上記両金属部材の軸心を比較的容易に一致させながら、上記突起部と相手側の対向面との接触部と、上記円筒部および嵌合孔の各周面どうしの接触部との両方を同時に接合することができる。このため、接合後の寸法精度(同心度)を十分に確保しつつ、上記2箇所の接触部を介して上記第1および第2の金属部材を高強度に接合することができるとともに、1回の通電で上記2箇所の接触部を同時に接合することにより、その作業効率を効果的に向上させることができるという利点がある。   According to the present invention, the cylindrical portion of the first metal member is inserted into the fitting hole of the second metal member so that the peripheral surfaces of both are brought into contact with each other, and one of the first and second metal members By energizing in a state where the protrusion provided on the other side is in contact with the opposing surface of the other party, the axial center of the two metal members is relatively easily aligned, while the opposing surface of the opposite side And both the cylindrical portion and the contact portion between the peripheral surfaces of the fitting hole can be joined at the same time. Therefore, the first and second metal members can be bonded with high strength through the two contact portions while sufficiently securing the dimensional accuracy (concentricity) after bonding, and once. There is an advantage that the working efficiency can be effectively improved by joining the two contact portions at the same time by energization.

本発明において、好ましくは、上記第1および第2の金属部材の加圧および通電を、両金属部材を挟んで対向配置される一対の電極を用いて行う(請求項2)。   In the present invention, preferably, the first metal member and the second metal member are pressurized and energized using a pair of electrodes disposed opposite to each other with the two metal members interposed therebetween.

このようにすれば、設備の簡略化を図りつつ、より効率よく金属部材の接合を行えるという利点がある。   If it does in this way, there exists an advantage that a metal member can be joined more efficiently, aiming at the simplification of an installation.

本発明の接合方法は、例えば、上記第1金属部材が変速機用のギアであり、上記第2金属部材がシンクロコーンである場合に好適に適用することができる(請求項3)。   The joining method of the present invention can be suitably applied when, for example, the first metal member is a gear for a transmission and the second metal member is a synchro cone (Claim 3).

このようにすれば、比較的高度な寸法精度および接合強度が求められるギアおよびシンクロコーンの接合を適正に行えるという利点がある。   In this way, there is an advantage that gears and synchro cones that require relatively high dimensional accuracy and joint strength can be joined appropriately.

またこの場合、上記ギアおよびシンクロコーンのいずれか一方に、上記突起部よりも径方向外側に位置するリング状の受け部を形成し、上記ギアとシンクロコーンとの接合完了時に、上記受け部を上記シンクロコーンの壁面に当接させることが好ましい(請求項4)。   Further, in this case, a ring-shaped receiving portion that is positioned radially outward from the protruding portion is formed on one of the gear and the synchro cone, and when the joining of the gear and the synchro cone is completed, the receiving portion is It is preferable to make it contact | abut to the wall surface of the said synchro cone.

このようにすれば、接合完了時に、シンクロコーンの軸方向位置をギアに対し正確に位置決めすることができ、接合後の寸法精度をより効果的に向上させることができる等の利点がある。   By doing so, there is an advantage that, when the joining is completed, the axial position of the synchrocone can be accurately positioned with respect to the gear, and the dimensional accuracy after joining can be improved more effectively.

以上説明したように、本発明の金属部材の接合方法によれば、寸法精度や接合強度を十分に確保しつつ、より効率よく金属部材の接合を行うことができる。   As described above, according to the method for joining metal members of the present invention, the metal members can be joined more efficiently while sufficiently ensuring dimensional accuracy and joining strength.

<実施形態1>
図1は、本発明の第1実施形態にかかる金属部材の接合方法を説明するための示す図であり、接合対象としてのギア1およびシンクロコーン2の形状を示す分解断面図である。この図1の例において、ギア1は、自動車用の手動変速機に備わるドリブンギアであり、シンクロコーン2は、いわゆるシンクロメッシュ(同期噛合機構)の一構成要素として上記ギア1に接合される部品である。これらギア1およびシンクロコーン2の材質としては、例えばSCr鋼等の浸炭焼入れ鋼が用いられる。
<Embodiment 1>
FIG. 1 is a view for explaining a method for joining metal members according to the first embodiment of the present invention, and is an exploded sectional view showing the shapes of a gear 1 and a synchro cone 2 as joining objects. In the example of FIG. 1, the gear 1 is a driven gear provided in a manual transmission for an automobile, and the synchro cone 2 is a component joined to the gear 1 as a component of a so-called synchromesh (synchronous meshing mechanism). It is. As the material of the gear 1 and the synchro cone 2, for example, carburized and quenched steel such as SCr steel is used.

上記ギア1は、本発明の第1金属部材の一例に相当するものであり、所定厚みの円盤状に形成されてその外周部に歯部G1を有した本体部3と、この本体部3から軸心Xに沿って厚み方向に突出する円筒状の円筒部4とを有している。このギア1には、その本体部3および円筒部4に亘って厚み方向に貫通する挿通孔5が設けられており、変速機の組立時には、図外のメインシャフトが上記挿通孔5に摺動可能に(またはベアリングを介して転動可能に)挿入されるようになっている。   The gear 1 corresponds to an example of a first metal member of the present invention. The gear 1 is formed in a disc shape having a predetermined thickness and has a tooth portion G1 on the outer peripheral portion thereof. And a cylindrical cylindrical portion 4 protruding in the thickness direction along the axis X. The gear 1 is provided with an insertion hole 5 penetrating in the thickness direction over the main body portion 3 and the cylindrical portion 4, and a main shaft (not shown) slides into the insertion hole 5 when the transmission is assembled. It is inserted in a possible manner (or in a rollable manner via a bearing).

一方、上記シンクロコーン2は、本発明の第2金属部材の一例に相当するものであり、本体部11と、この本体部11から突設されたコーン部12とを有している。このうち、本体部11には、その中央部に所定半径の嵌合孔10が形成されるとともに、外周部に歯部G2が形成されている。一方、コーン部12は、上記嵌合孔10よりも大径の孔16を有したリング状の部材からなり、その外周面がテーパ状に形成されている。そして、変速機のシンクロ動作時には、上記コーン部12のテーパ状の外周面が図外のシンクロリングの内周面に圧接されることにより、回転速度の同期が図られるようになっている。   On the other hand, the synchro cone 2 corresponds to an example of the second metal member of the present invention, and includes a main body portion 11 and a cone portion 12 protruding from the main body portion 11. Among these, the main body portion 11 has a fitting hole 10 having a predetermined radius at the center thereof and a tooth portion G2 at the outer peripheral portion. On the other hand, the cone portion 12 is made of a ring-shaped member having a hole 16 having a diameter larger than that of the fitting hole 10, and an outer peripheral surface thereof is formed in a tapered shape. During the synchronization operation of the transmission, the tapered outer peripheral surface of the cone portion 12 is brought into pressure contact with the inner peripheral surface of the synchro ring (not shown) to synchronize the rotational speed.

上記シンクロコーン2の嵌合孔10の内周面は、その上部の内径が他の部分よりもわずかに小さくなるように段差状に形成されている。このうち、相対的に内径の小さい嵌合孔10の上部周面は小径部10aとされ、この小径部10aの内径は、上記ギア1の円筒部4の外径と略同一の値とされている。そして、上記ギア1とシンクロコーン2との接合時には、上記嵌合孔10にギア1の円筒部4が挿入されることにより、上記嵌合孔10の小径部10aが上記円筒部4の外周面に接触し、その状態で流される電流の抵抗熱により当該接触部が接合されるようになっている(詳細は後述する)。なお、上記構成において、「小径部10aの内径と円筒部4の外径とが略同一」というのは、加工公差程度のわずかな隙間もしくは締め代が両者の間に存在してもよいことを意味するものである。   The inner peripheral surface of the fitting hole 10 of the synchro cone 2 is formed in a stepped shape so that the inner diameter of the upper portion thereof is slightly smaller than other portions. Among these, the upper peripheral surface of the fitting hole 10 having a relatively small inner diameter is a small diameter portion 10a, and the inner diameter of the small diameter portion 10a is substantially the same value as the outer diameter of the cylindrical portion 4 of the gear 1. Yes. When the gear 1 and the synchro cone 2 are joined, the cylindrical portion 4 of the gear 1 is inserted into the fitting hole 10 so that the small-diameter portion 10a of the fitting hole 10 is the outer peripheral surface of the cylindrical portion 4. The contact portion is joined by the resistance heat of the current flowing in this state (details will be described later). In the above configuration, “the inner diameter of the small-diameter portion 10a and the outer diameter of the cylindrical portion 4 are substantially the same” means that a slight gap or tightening allowance that is about the processing tolerance may exist between the two. That means.

図1および図6等に示すように、上記シンクロコーン2のうち、接合時にギア1の本体部3と対向する対向面13には、所定高さの突起部15が設けられている。この突起部15は、上記嵌合孔10の内径よりも直径が大きいリング状の突起からなり(図1ではその直径をDとしている)、シンクロコーン2の軸心Yを中心に上記嵌合孔10と同心円状に配置さている。なお、上記突起部15は、例えばギア1の対向面13を機械加工する際に同時に形成することが可能である。   As shown in FIGS. 1 and 6 and the like, a protrusion 15 having a predetermined height is provided on the facing surface 13 of the synchrocone 2 that faces the main body 3 of the gear 1 at the time of joining. The protrusion 15 is a ring-shaped protrusion whose diameter is larger than the inner diameter of the fitting hole 10 (the diameter is D in FIG. 1), and the fitting hole is centered on the axis Y of the synchrocone 2. 10 and concentric circles. The protrusion 15 can be formed at the same time as machining the facing surface 13 of the gear 1, for example.

一方、上記ギア1の本体部3のうち、接合時に上記シンクロコーン2と対向する対向面6には、ギア1の軸心Xを中心としてリング状に形成された直径の異なる一対の受け部8a,8bが突設されている。このうち受け部8aの直径は、上記シンクロコーン2の突起部15の直径Dよりも大きい値とされ、もう一方の受け部8bの直径は、上記突起部15の直径Dよりも小さい値とされている。また、図5等にも示すように、上記受け部8a,8bの突出高さは、上記突起部15の突出高さよりも小さい値とされており、上記ギア1とシンクロコーン2との接合時に上記突起部15が相手側の対向面6(より具体的には受け部8a,8bの間の面)に当接した時点で、上記シンクロコーン2の対向面13と受け部8a,8bとの間に所定の隙間が形成されるようになっている。   On the other hand, of the main body 3 of the gear 1, a pair of receiving portions 8 a having different diameters formed in a ring shape around the shaft center X of the gear 1 is formed on the opposing surface 6 that faces the synchrocone 2 at the time of joining. , 8b are projected. Of these, the diameter of the receiving portion 8a is larger than the diameter D of the protruding portion 15 of the synchrocone 2, and the diameter of the other receiving portion 8b is smaller than the diameter D of the protruding portion 15. ing. Further, as shown in FIG. 5 and the like, the protruding height of the receiving portions 8a and 8b is set to a value smaller than the protruding height of the protruding portion 15, and when the gear 1 and the synchro cone 2 are joined. When the projection 15 abuts against the opposing surface 6 on the other side (more specifically, the surface between the receiving portions 8a and 8b), the opposing surface 13 of the synchrocone 2 and the receiving portions 8a and 8b A predetermined gap is formed between them.

次に、以上のように構成されたギア1およびシンクロコーン2を接合する手順につい図2〜図7を用いて説明する。ここでの接合は、図4等に示される上部電極21および下部電極22等を備えた接合装置を用いて行われる。なお、以下の説明では、上記上部電極21および下部電極22を上下方向に対向配置して、その間に上記ギア1およびシンクロコーン2を挟み込むようにして接合を行うが、例えば、上記両電極21,22を水平方向に対向配置した状態で接合を行うことも当然に可能である。   Next, a procedure for joining the gear 1 and the synchro cone 2 configured as described above will be described with reference to FIGS. The bonding here is performed using a bonding apparatus including the upper electrode 21 and the lower electrode 22 shown in FIG. In the following description, the upper electrode 21 and the lower electrode 22 are disposed so as to face each other in the vertical direction and the gear 1 and the synchrocone 2 are sandwiched between them. It is of course possible to perform the joining in a state where the 22s are arranged opposite to each other in the horizontal direction.

上記下部電極22は、図2〜図5に示すように、ベース部27と、このベース部27から上方に突出するように設けられた突出軸部28と、この突出軸部28の外周を取り囲むように設けられたリング状の電極部29とを有している。このような下部電極22は、接合作業時に、上記突出軸部28がギア1の挿通孔5に挿入され、かつ上記挿通孔5の下側の周縁部からなる座面部7に上記電極部29の上端面が突き当てられた状態で使用される。なお、上記突出軸部28の外径は、上記ギア1の挿通孔5の内径よりもある程度小さくされており、上記挿通孔5に突出軸部28が比較的スムーズに挿入されるようになっている。   As shown in FIGS. 2 to 5, the lower electrode 22 surrounds a base portion 27, a protruding shaft portion 28 provided so as to protrude upward from the base portion 27, and an outer periphery of the protruding shaft portion 28. And a ring-shaped electrode portion 29 provided as described above. Such a lower electrode 22 has the protruding shaft portion 28 inserted into the insertion hole 5 of the gear 1 and a seating surface portion 7 formed of a lower peripheral portion of the insertion hole 5 at the time of joining work. It is used in a state where the upper end surface is abutted. The outer diameter of the protruding shaft portion 28 is made somewhat smaller than the inner diameter of the insertion hole 5 of the gear 1 so that the protruding shaft portion 28 is inserted into the insertion hole 5 relatively smoothly. Yes.

一方、上記上部電極21は、図4等に示すように、ベース部23と、このベース部23の下面に取り付けられた電極部24とを有している。電極部24は、下向きに開口する凹部を有した円筒体からなり、接合作業時には、上記シンクロコーン2のコーン部12上端からなる座面部14に上記電極部24の下端面が突き当てられるようになっている。   On the other hand, the upper electrode 21 has a base portion 23 and an electrode portion 24 attached to the lower surface of the base portion 23, as shown in FIG. The electrode portion 24 is formed of a cylindrical body having a concave portion that opens downward, and the lower end surface of the electrode portion 24 is abutted against the seat surface portion 14 formed of the upper end of the cone portion 12 of the synchro cone 2 at the time of joining work. It has become.

また、上記上部電極21および下部電極22の各電極部24,29の間には、図4および図5に示される交流式または直流式の電源供給装置30が設けられており、この電源供給装置30から供給される接合用の高電圧が上記各電極部24,29の間に印加されるようになっている。そして、上記ギア1およびシンクロコーン2に対し上記各電極部24,29がそれぞれ圧着された状態で上記高電圧が印加されることにより、上記ギア1およびシンクロコーン2の間に所定の電流が流れ、その通電による抵抗熱で両者が接合されるようになっている。   Further, an AC type or DC type power supply device 30 shown in FIGS. 4 and 5 is provided between the electrode portions 24 and 29 of the upper electrode 21 and the lower electrode 22, and this power supply device. A high voltage for bonding supplied from 30 is applied between the electrode portions 24 and 29. A predetermined current flows between the gear 1 and the synchro cone 2 when the high voltage is applied to the gear 1 and the synchro cone 2 with the electrode portions 24 and 29 being pressed. Both are joined by resistance heat caused by the energization.

以上のように構成された接合装置を用いてギア1とシンクロコーン2とを接合するには、まず、図2に示すように、上記ギア1を下部電極22にセットする。具体的には、上記ギア1を下部電極22に対し上から接近させることにより、上記下部電極22の突出軸部28をギア1の挿通孔5に挿入するとともに、上記ギア1の座面部7を電極部25の上端面に当接させる。これにより、ギア1が下部電極22に対し径方向および軸方向(上下方向)に位置決めされた状態でセットされる。   In order to join the gear 1 and the synchrocone 2 using the joining apparatus configured as described above, first, the gear 1 is set on the lower electrode 22 as shown in FIG. Specifically, by bringing the gear 1 close to the lower electrode 22 from above, the protruding shaft portion 28 of the lower electrode 22 is inserted into the insertion hole 5 of the gear 1 and the seat surface portion 7 of the gear 1 is moved. It is made to contact | abut to the upper end surface of the electrode part 25. FIG. Accordingly, the gear 1 is set in a state where the gear 1 is positioned in the radial direction and the axial direction (vertical direction) with respect to the lower electrode 22.

次いで、図3に示すように、上記下部電極22にセットされたギア1に対し、シンクロコーン2を上から接近させることにより、このシンクロコーン2の嵌合孔10に上記ギア1の円筒部4を挿入する。ただし、上述したように、上記嵌合孔10における小径部10aの内径が上記円筒部4の外径と略同一であることから、この時点で上記円筒部4が嵌合孔10に完全に挿入されることはなく、その挿入の途中で上記シンクロコーン2がギア1に対し仮止めされる。すなわち、円筒部4を嵌合孔10に挿入しようとしても、上記円筒部4の上端部が上記嵌合孔10の小径部10aの位置まで達した時点で、上記小径部10aの内周面と円筒部4の外周面とが互いに接触するため、上記シンクロコーン2は、後述する挿入完了位置(つまりシンクロコーン2およびギア1の各対向面13,6が互いに当接する位置;図4参照)まで移動することなく、その途中で仮止めされて上記ギア1に対し所定距離浮き上がった図3の状態に保持される。なお、当実施形態では、図2に示すように、ギア1を下部電極22に対しセットした後に、図3に示すようにギア1の円筒部をシンクロコーン2の嵌合孔10に部分的に挿入して上記シンクロコーン2を仮止めするようにしたが、このようなシンクロコーン2の仮止めをあらかじめ行った上で、上記ギア1を下部電極22にセットすることも当然に可能である。   Next, as shown in FIG. 3, the synchro cone 2 is made to approach the gear 1 set on the lower electrode 22 from above, so that the cylindrical portion 4 of the gear 1 is inserted into the fitting hole 10 of the synchro cone 2. Insert. However, as described above, since the inner diameter of the small diameter portion 10a in the fitting hole 10 is substantially the same as the outer diameter of the cylindrical portion 4, the cylindrical portion 4 is completely inserted into the fitting hole 10 at this time. The synchro cone 2 is temporarily fixed to the gear 1 during the insertion. That is, even if the cylindrical portion 4 is to be inserted into the fitting hole 10, when the upper end portion of the cylindrical portion 4 reaches the position of the small diameter portion 10 a of the fitting hole 10, the inner peripheral surface of the small diameter portion 10 a Since the outer peripheral surface of the cylindrical portion 4 comes into contact with each other, the synchro cone 2 is moved to an insertion completion position (that is, a position at which the opposite surfaces 13 and 6 of the synchro cone 2 and the gear 1 abut each other; see FIG. 4). Without moving, it is temporarily fixed in the middle and is held in the state of FIG. In this embodiment, as shown in FIG. 2, after setting the gear 1 to the lower electrode 22, the cylindrical portion of the gear 1 is partially inserted into the fitting hole 10 of the synchro cone 2 as shown in FIG. Although the synchro cone 2 is temporarily fixed by being inserted, it is naturally possible to set the gear 1 on the lower electrode 22 after performing the temporary lock of the synchro cone 2 in advance.

次いで、上記のようにしてギア1に仮止めされたシンクロコーン2に対し上部電極21(図4参照)を上から接近させ、その電極部24の下端面を上記シンクロコーン2の座面部14に突き当てるとともに、その状態で下向きの加圧力F1(例えば1ton)を上記上部電極21に加えることにより、図4に示される挿入完了位置、つまり、シンクロコーン2の対向面13に突設された上記突起部15がギア1の対向面6に当接する位置まで上記シンクロコーン2を押し込む。   Next, the upper electrode 21 (see FIG. 4) is approached from above with respect to the synchro cone 2 temporarily fixed to the gear 1 as described above, and the lower end surface of the electrode portion 24 is brought to the seat surface portion 14 of the synchro cone 2. In this state, a downward pressing force F1 (for example, 1 ton) is applied to the upper electrode 21 in this state, so that the insertion completion position shown in FIG. The synchro cone 2 is pushed into a position where the projection 15 abuts against the facing surface 6 of the gear 1.

そして、最終的に図5に示すように、上記上部電極21に対する加圧力を、先の図4の時点における加圧力F1よりもさらに大きい加圧力F2(例えば8ton)に増大させるとともに、上記電源供給装置30を作動させて上記上部電極21および下部電極22の間に接合用の高電圧を印加することにより、上記ギア1およびシンクロコーン2を比較的大きな力で接近方向に加圧しつつ、両者の間に瞬間的に大きな電流A(例えば320kA程度)を流し、このときの抵抗熱によって上記ギア1およびシンクロコーン2を接合する。   Finally, as shown in FIG. 5, the pressure applied to the upper electrode 21 is increased to a pressure F2 (for example, 8 ton) larger than the pressure F1 at the time of FIG. 4, and the power supply is performed. By operating the device 30 and applying a high voltage for bonding between the upper electrode 21 and the lower electrode 22, while pressing the gear 1 and the synchrocone 2 in the approaching direction with a relatively large force, A large current A (for example, about 320 kA) is instantaneously passed between them, and the gear 1 and the synchro cone 2 are joined by resistance heat at this time.

具体的に、上記ギア1およびシンクロコーン2の間を流れる電流Aは、図6に示される接触部S1,S2、つまり、突起部15と相手側の対向面6との接触部S1と、円筒部4および嵌合孔10の各周面どうしの接触部S2とを介してそれぞれ流れる。すると、このときの抵抗熱によって上記接触部S1,S2における金属が軟化または溶融するとともに、通電が停止されて当該部の金属が再び硬化することにより、上記接触部S1,S2が一体化されて上記ギア1とシンクロコーン2とが接合される。なお、上記構成において「金属が軟化または溶融」とあるのは、通電による抵抗熱で上記接触部S1,S2の金属を完全に溶融させてもよいし、それよりも低い温度で軟化させてもよいということである。すなわち、本発明における接合の形態には、上記接触部S1,S2の金属を融点以上に昇温させて再凝固させる場合と、融点よりも低い温度で軟化させて塑性流動を生じさせ、固相状態で接合する場合との両方が含まれる。   Specifically, the current A flowing between the gear 1 and the synchrocone 2 is the contact portions S1 and S2 shown in FIG. 6, that is, the contact portion S1 between the projecting portion 15 and the opposing surface 6 on the other side, and the cylinder. It flows through the contact portion S2 between the peripheral surfaces of the portion 4 and the fitting hole 10, respectively. Then, the metal at the contact portions S1 and S2 is softened or melted by the resistance heat at this time, and the contact portions S1 and S2 are integrated as a result of the energization being stopped and the metal at the portions being hardened again. The gear 1 and the synchro cone 2 are joined. In the above configuration, “the metal is softened or melted” means that the metal of the contact portions S1 and S2 may be completely melted by resistance heat by energization or may be softened at a lower temperature. That is good. That is, in the form of joining in the present invention, the metal of the contact portions S1 and S2 is re-solidified by raising the temperature to the melting point or higher, and softened at a temperature lower than the melting point to cause plastic flow, Both are included in the case of joining in a state.

図7は、上記ギア1およびシンクロコーン2の接合が完了した状態を示す図である。本図に示すように、接合が完了すると、上記シンクロコーン2の突起部15がつぶされ、上記ギア1の対向面6に設けられた受け部8a,8bにシンクロコーン2の対向面13が当接した状態になる。すなわち、通電による抵抗熱で上記突出部15が軟化または溶融するのに合わせて、上記シンクロコーン2に上部電極21からの下向きに加圧力F2(図5)が加えられることにより、上記突起部15がつぶされてシンクロコーン2全体が下方に変位し、上記ギア1の受け部8a,8bにシンクロコーン2の対向面13が当接する。これにより、シンクロコーン2の軸方向位置がギア1に対し位置決めされるとともに、上記突起部15と対向面6との接触部S1の周囲が、上記受け部8a,8bによって外部から密閉される。   FIG. 7 is a view showing a state where the joining of the gear 1 and the synchro cone 2 is completed. As shown in this figure, when the joining is completed, the projection 15 of the synchrocone 2 is crushed, and the opposing surface 13 of the synchrocone 2 contacts the receiving portions 8a and 8b provided on the opposing surface 6 of the gear 1. It will be in contact. That is, as the protrusion 15 is softened or melted by resistance heat due to energization, a pressure F2 (FIG. 5) is applied to the synchrocone 2 downward from the upper electrode 21, whereby the protrusion 15 As a result, the entire synchro cone 2 is displaced downward, and the opposing surface 13 of the synchro cone 2 comes into contact with the receiving portions 8a and 8b of the gear 1. Thereby, the axial position of the synchrocone 2 is positioned with respect to the gear 1, and the periphery of the contact portion S1 between the projection 15 and the facing surface 6 is sealed from the outside by the receiving portions 8a and 8b.

なお、先にも述べた通り、上記ギア1の円筒部4とシンクロコーン2の小径部10aとの間には、通電を行う前の時点において加工公差程度のわずかな隙間もしくは締め代が存在するのが通常であるが、このような状況で上記ギア1およびシンクロコーン2の間に所定の電流を流すことにより、両者の間に締め代が存在する場合はもちろんのこと、隙間が存在する場合でも、上記円筒部4と小径部10aとの接合(接触部S2の接合)は問題なく行われると考えられる。すなわち、上記円筒部4と小径部10aとの間に上記のようなわずかな隙間が存在したとしても、局所的に見れば、両者の周面の一部が必ず接触していると考えられるため、そこを起点として通電による抵抗熱が発生し、その後の金属の軟化または溶融に伴って上記接触部の面積が拡大することにより、最終的には上記円筒部4と小径部10aとが略全周にわたって接合される。   As described above, there is a slight gap or tightening allowance between the cylindrical portion 4 of the gear 1 and the small-diameter portion 10a of the synchrocone 2 at the time before energization is performed. In such a situation, when a predetermined current flows between the gear 1 and the synchro cone 2 in such a situation, there is a clearance as well as a clearance between them. However, it is considered that the joining of the cylindrical portion 4 and the small diameter portion 10a (joining of the contact portion S2) is performed without any problem. That is, even if there is a slight gap as described above between the cylindrical portion 4 and the small diameter portion 10a, it is considered that a part of the peripheral surface of both is always in contact when viewed locally. From that point, resistance heat is generated by energization, and the area of the contact portion is increased with the subsequent softening or melting of the metal, so that the cylindrical portion 4 and the small-diameter portion 10a are finally substantially completely formed. Joined over the circumference.

以上説明したように、上記第1実施形態の金属部材の接合方法は、所定厚みの本体部3およびそこから厚み方向に突出する円筒部4を有したギア1と、このギア1の円筒部4が挿入される嵌合孔10を有したシンクロコーン2とを、通電による抵抗熱で接合するというものである。そして、この接合方法には、上記ギア1の本体部3と対向するシンクロコーン2の対向面13に、所定高さの突起部15を設ける工程と、上記ギア1の円筒部4を上記シンクロコーン2の嵌合孔10に挿入して両者の各周面どうしを接触させるとともに、上記突起部15を相手側(ギア1)の対向面6に当接させる工程と、この状態で上記ギア1およびシンクロコーン2を接近方向に加圧しつつ通電することにより、上記突起部15と相手側の対向面6との接触部S1を接合するとともに、上記円筒部4および嵌合孔10の各周面どうしの接触部S2を接合する工程とが含まれる。この方法によれば、寸法精度や接合強度を十分に確保しつつ、より効率よく金属部材の接合を行えるという利点がある。   As described above, the metal member joining method according to the first embodiment includes the gear 1 having the main body 3 having a predetermined thickness and the cylindrical portion 4 protruding from the main body 3 in the thickness direction, and the cylindrical portion 4 of the gear 1. The synchro cone 2 having the fitting hole 10 into which is inserted is joined by resistance heat by energization. In this joining method, a step of providing a protrusion 15 having a predetermined height on the facing surface 13 of the synchrocone 2 facing the main body 3 of the gear 1 and the cylindrical part 4 of the gear 1 are connected to the synchrocone. 2 is inserted into the two fitting holes 10 and the peripheral surfaces of the two are brought into contact with each other, and the projecting portion 15 is brought into contact with the opposing surface 6 of the other side (gear 1). By energizing the synchrocone 2 while pressing it in the approaching direction, the contact portion S1 between the protruding portion 15 and the opposing surface 6 is joined, and the peripheral surfaces of the cylindrical portion 4 and the fitting hole 10 are connected to each other. And joining the contact portion S2. According to this method, there is an advantage that the metal members can be joined more efficiently while sufficiently securing the dimensional accuracy and the joining strength.

すなわち、上記第1実施形態では、ギア1の円筒部4をシンクロコーン2の嵌合孔10に挿入して両者の各周面どうしを接触させ(つまり円筒部4の外周面と嵌合孔10の小径部10aの内周面とを互いに接触させ)、かつシンクロコーン2に設けられた突起部15をギア1の対向面6に当接させた状態で通電を行うことにより、上記ギア1およびシンクロコーン2の軸心(図1のX,Y)を比較的容易に一致させながら、上記突起部15と相手側の対向面6との接触部S1と、上記円筒部4および嵌合孔10の各周面どうしの接触部S2との両方を同時に接合することができる。このため、接合後の寸法精度(同心度)を十分に確保しつつ、上記2箇所の接触部S1,S2を介してギア1およびシンクロコーン2を高強度に接合することができるとともに、1回の通電で上記接触部S1,S2を同時に接合することにより、その作業効率を効果的に向上させることができるという利点がある。   That is, in the first embodiment, the cylindrical portion 4 of the gear 1 is inserted into the fitting hole 10 of the synchrocone 2 so that the peripheral surfaces of both are brought into contact with each other (that is, the outer peripheral surface of the cylindrical portion 4 and the fitting hole 10). The small diameter portion 10a is in contact with the inner peripheral surface of the small cone portion 10a) and the projection 15 provided on the synchrocone 2 is in contact with the opposing surface 6 of the gear 1 to conduct current. While the axes (X, Y in FIG. 1) of the synchrocone 2 are relatively easily aligned, the contact portion S1 between the projection 15 and the opposing surface 6 on the other side, the cylindrical portion 4 and the fitting hole 10 Both the contact portions S2 of the peripheral surfaces can be joined at the same time. For this reason, the gear 1 and the synchro cone 2 can be joined with high strength through the two contact portions S1 and S2 while ensuring sufficient dimensional accuracy (concentricity) after joining, and once. There is an advantage that the working efficiency can be effectively improved by joining the contact portions S1 and S2 at the same time by energization.

また、上記第1実施形態では、ギア1の対向面6に、上記突起部15の直径Dよりも大径または小径の(つまり突起部15に対し径方向外側または内側に位置する)リング状の受け部8a,8bを形成し、上記ギア1とシンクロコーン2との接合完了時に、上記受け部8a,8bを上記シンクロコーン2の壁面(対向面13)に当接させるようにしたため、上記シンクロコーン2の軸方向位置をギア1に対し正確に位置決めすることができ、接合後の寸法精度をより効果的に向上させることができるという利点がある。また、上記のように受け部8a,8bをシンクロコーン2の対向面13に当接させて両者の隙間をなくすことにより、例えば接合後の後処理として上記ギア1およびシンクロコーン2に対しショットピーニングを施す際に、上記接触部S1周辺のわずかな隙間にショット粉がつまってしまうのを効果的に防止できるという利点もある。   Moreover, in the said 1st Embodiment, the opposing surface 6 of the gear 1 is a ring shape larger or smaller than the diameter D of the projection 15 (that is, located radially outside or inside the projection 15). Since the receiving portions 8a and 8b are formed and the receiving portions 8a and 8b are brought into contact with the wall surface (opposing surface 13) of the synchrocone 2 when the joining of the gear 1 and the synchrocone 2 is completed, the synchro There is an advantage that the axial position of the cone 2 can be accurately positioned with respect to the gear 1 and the dimensional accuracy after joining can be improved more effectively. In addition, as described above, the receiving portions 8a and 8b are brought into contact with the opposing surface 13 of the synchrocone 2 to eliminate the gap between them, for example, shot peening for the gear 1 and the synchrocone 2 as post-processing after joining. There is also an advantage that it is possible to effectively prevent the shot powder from being clogged in a slight gap around the contact portion S1.

なお、上記第1実施形態では、突起部15の径方向外側および内側に位置する2つの受け部8a,8bをギア1の対向面6に設けたが、ショット粉のつまりを防止しつつシンクロコーン2を位置決めするには、少なくとも径方向外側の受け部8aが存在すればよいので、径方向内側の受け部8bについては省略してもよい。   In the first embodiment, the two receiving portions 8a and 8b positioned on the radially outer side and the inner side of the protrusion 15 are provided on the facing surface 6 of the gear 1. However, the synchro cone is prevented from being clogged with shot powder. In order to position 2, it suffices that at least the radially outer receiving portion 8 a exists, and therefore the radially inner receiving portion 8 b may be omitted.

また、上記第1実施形態では、ギア1およびシンクロコーン2を挟んで対向配置される一対の電極21,22を用いて加圧および通電を行うようにしたが、例えばギア1およびシンクロコーン2を専用のプレス機により加圧しつつ、これとは別体に設けられた電極を用いて通電を行うことも当然に可能である。ただし、このようにした場合には、プレス機用の設備と電極用の設備の両方が必要であるため、設備全体が複雑化する等の問題が生じる。これに対し、上記第1実施形態のように、ギア1およびシンクロコーン2の加圧および通電の両方を一対の電極21,22を用いて行うようにした場合には、上記ギア1およびシンクロコーン2の接合をより簡略な設備を用いて効率よく行えるという利点がある。   In the first embodiment, pressurization and energization are performed using a pair of electrodes 21 and 22 arranged opposite to each other with the gear 1 and the synchrocone 2 interposed therebetween. It is of course possible to energize using a separate electrode while applying pressure with a dedicated press. However, in this case, both the equipment for the press machine and the equipment for the electrode are necessary, so that the entire equipment becomes complicated. On the other hand, when both the pressurization and energization of the gear 1 and the synchrocone 2 are performed using the pair of electrodes 21 and 22 as in the first embodiment, the gear 1 and the synchrocone are provided. There exists an advantage that joining of 2 can be performed efficiently using simpler equipment.

また、上記第1実施形態では、シンクロコーン2の対向面13に突起部15を設けるとともに、ギア1の対向面6に受け部8a,8bを設けたが、これとは逆に、ギア1側に突起部15を設け、かつシンクロコーン2側に受け部8a,8bを設けてもよい。また、上記突起部15および受け部8a,8bを、ギア1およびシンクロコーン2のいずれか一方にまとめて設けてもよい。   Moreover, in the said 1st Embodiment, while providing the projection part 15 in the opposing surface 13 of the synchrocone 2 and providing the receiving parts 8a and 8b in the opposing surface 6 of the gear 1, conversely to this, the gear 1 side Protruding part 15 may be provided on the side and receiving parts 8a and 8b may be provided on the synchro cone 2 side. Further, the protruding portion 15 and the receiving portions 8a and 8b may be provided together on either the gear 1 or the synchro cone 2.

また、上記第1実施形態では、手動変速機(MT)用のギア1およびシンクロコーン2の接合に本発明の接合方法を適用した場合を例について説明したが、本発明の接合方法は、比較的高度な寸法精度および接合強度が求められる金属部材どうしの接合に幅広く適用することが可能である。次に、上記第1実施形態とは異なる金属部材に本発明の接合方法を適用した場合の一例を実施形態2として説明する。   In the first embodiment, the case where the joining method of the present invention is applied to the joining of the gear 1 for the manual transmission (MT) and the synchro cone 2 has been described as an example. It can be widely applied to the joining of metal members that require a high degree of dimensional accuracy and joining strength. Next, an example in which the joining method of the present invention is applied to a metal member different from the first embodiment will be described as a second embodiment.

<実施形態2>
図8は、本発明の第2実施形態にかかる金属部材の接合方法を説明するための図である。ここでは、上記第1実施形態と異なり、自動変速機(AT)用の部品であるワンウェイクラッチアウターレース51およびクラッチドラム52に本発明の接合方法が適用される。
<Embodiment 2>
FIG. 8 is a view for explaining a method for joining metal members according to the second embodiment of the present invention. Here, unlike the first embodiment, the joining method of the present invention is applied to a one-way clutch outer race 51 and a clutch drum 52 which are parts for an automatic transmission (AT).

上記ワンウェイクラッチアウターレース51(以下単にアウターレース51と称する)は、外周にスプライン歯G3が形成された本体部53と、この本体部53から厚み方向に突出する多段状の円筒部54とを有している。一方、上記クラッチドラム52には、上記円筒部54の基端部の外径と略同一の内径を有した嵌合孔60が形成されており、この嵌合孔60に上記円筒部54が挿入された状態で上記アウターレース51とクラッチドラム52とが接合されるようになっている。すなわち、当実施形態では、アウターレース51が本発明にかかる第1金属部材に相当し、クラッチドラム52が本発明にかかる第2金属部材に相当する。   The one-way clutch outer race 51 (hereinafter simply referred to as the outer race 51) has a main body portion 53 having spline teeth G3 formed on the outer periphery and a multi-stage cylindrical portion 54 protruding from the main body portion 53 in the thickness direction. doing. On the other hand, the clutch drum 52 is formed with a fitting hole 60 having an inner diameter substantially the same as the outer diameter of the base end portion of the cylindrical portion 54, and the cylindrical portion 54 is inserted into the fitting hole 60. In this state, the outer race 51 and the clutch drum 52 are joined. That is, in this embodiment, the outer race 51 corresponds to the first metal member according to the present invention, and the clutch drum 52 corresponds to the second metal member according to the present invention.

上記アウターレース51の本体部53のうち、上記クラッチドラム52と対向する対向面56には、所定高さの突起部65が設けられており、接合時にはこの突起部65がクラッチドラム52の対向面63と接触するようになっている。また、上記アウターレース51の対向面56のうち、上記突起部65の径方向外側に位置する部位には、突出高さが上記突起部65よりも低い受け部58が設けられており、接合時に上記突起部65がつぶされた状態で、上記クラッチドラム52の対向面63が上記受け部58に当接するようになっている。すなわち、当実施形態では、先の第1実施形態と異なり、第1金属部材に相当するアウターレース51に、突起部65および受け部58の両方が設けられている。   Of the main body 53 of the outer race 51, a projecting portion 65 having a predetermined height is provided on the facing surface 56 facing the clutch drum 52, and this projecting portion 65 faces the facing surface of the clutch drum 52 during joining. 63 comes into contact. Further, a receiving portion 58 having a protruding height lower than that of the protruding portion 65 is provided in a portion of the facing surface 56 of the outer race 51 that is located on the radially outer side of the protruding portion 65. The facing surface 63 of the clutch drum 52 comes into contact with the receiving portion 58 in a state where the protruding portion 65 is crushed. That is, in the present embodiment, unlike the first embodiment, the outer race 51 corresponding to the first metal member is provided with both the protruding portion 65 and the receiving portion 58.

以上のように構成されたアウターレース51およびクラッチドラム52の接合は、図9に示される一対の電極71,72を用いて行われる。なお、その接合の手順は上記第1実施形態と同様であるため、その詳細な説明は省略する。   The outer race 51 and the clutch drum 52 configured as described above are joined using a pair of electrodes 71 and 72 shown in FIG. Since the joining procedure is the same as in the first embodiment, a detailed description thereof is omitted.

そして、上記のような接合が完了することにより、図10に示される接触部S3,S4、つまり、上記突起部65と対向面63との接触部S3と、上記円筒部54および嵌合孔60の各周面どうしの接触部S4との両方が同時に接合されるようになっている。   When the joining as described above is completed, the contact portions S3 and S4 shown in FIG. 10, that is, the contact portion S3 between the protrusion 65 and the facing surface 63, the cylindrical portion 54, and the fitting hole 60 are obtained. Both the contact portions S4 of the peripheral surfaces are joined at the same time.

以上説明したような本発明の第2実施形態によれば、アウターレース51およびクラッチドラム52の接合を、先の第1実施形態での接合時(つまりギア1およびシンクロコーン2の接合時)と同様に、寸法精度や接合強度を十分に確保しつつより効率よく行えるという利点がある。   According to the second embodiment of the present invention as described above, the outer race 51 and the clutch drum 52 are joined at the time of joining in the first embodiment (that is, when the gear 1 and the synchro cone 2 are joined). Similarly, there is an advantage that it can be performed more efficiently while sufficiently securing dimensional accuracy and bonding strength.

本発明の第1実施形態にかかる金属部材の接合方法を説明するための図であり、接合対象としてのギアおよびシンクロコーンの形状を示す分解断面図である。It is a figure for demonstrating the joining method of the metal member concerning 1st Embodiment of this invention, and is an exploded sectional view which shows the shape of the gear and synchro cone as a joining object. 上記ギアを下部電極にセットした状態を示す図である。It is a figure which shows the state which set the said gear to the lower electrode. 上記下部電極にセットされたギアにシンクロコーンを仮止めした状態を示す図である。It is a figure which shows the state which temporarily fixed the synchro cone to the gear set to the said lower electrode. 上記シンクロコーンを上部電極により上から加圧して挿入完了位置まで押し込んだ状態を示す図である。It is a figure which shows the state which pressurized the said synchro cone from the top with the upper electrode, and was pushed in to the insertion completion position. 上記上部電極および下部電極の間に接合用の電流を流すときの状況を示す図である。It is a figure which shows the condition when the electric current for joining is sent between the said upper electrode and a lower electrode. 図4および図5の一部拡大図である。FIG. 6 is a partially enlarged view of FIGS. 4 and 5. 接合完了時の状況を示す図6相当図である。FIG. 7 is a view corresponding to FIG. 6 illustrating a situation when the joining is completed. 本発明にかかる金属部材の接合方法の第2実施形態を説明するための図であり、接合対象としてのアウターレースおよびクラッチドラムの形状を示す分解断面図である。It is a figure for demonstrating 2nd Embodiment of the joining method of the metal member concerning this invention, and is an exploded sectional view which shows the shape of the outer race and clutch drum as joining object. 上記アウターレースおよびクラッチドラムを接合するときの状況を示す図である。It is a figure which shows the condition when joining the said outer race and a clutch drum. 接合完了時の状況を示す拡大段面図である。It is an enlarged step view which shows the condition at the time of joining completion.

符号の説明Explanation of symbols

1 ギア(第1金属部材)
2 シンクロコーン(第2金属部材)
3 本体部
4 円筒部
6 対向面
8a,8b 受け部
10 嵌合孔
13 対向面
15 突起部
21 上部電極(電極)
22 下部電極(電極)
S1,S2 接触部
51 アウターレース(第1金属部材)
52 クラッチドラム(第2金属部材)
54 円筒部
56 対向面
58 受け部
60 嵌合孔
63 対向面
65 突起部
71,72 電極
S3,S4 接触部
1 Gear (first metal member)
2 Synchrocone (second metal member)
DESCRIPTION OF SYMBOLS 3 Main-body part 4 Cylindrical part 6 Opposite surface 8a, 8b Receiving part 10 Fitting hole 13 Opposed surface 15 Protrusion part 21 Upper electrode (electrode)
22 Lower electrode (electrode)
S1, S2 contact part 51 outer race (first metal member)
52 Clutch drum (second metal member)
54 Cylindrical part 56 Opposing surface 58 Receiving part 60 Fitting hole 63 Opposing surface 65 Protruding part 71, 72 Electrode S3, S4 Contact part

Claims (4)

所定厚みの本体部およびそこから厚み方向に突出する円筒部を有した第1金属部材と、この第1金属部材の円筒部が挿入される嵌合孔を有した第2金属部材とを、通電による抵抗熱で接合する方法であって、
上記第1金属部材の本体部の壁面およびこれと対向する第2金属部材の対向面のうちのいずれか一方に、所定高さの突起部を設ける工程と、
上記第1金属部材の円筒部を上記第2金属部材の嵌合孔に挿入して両者の各周面どうしを接触させるとともに、上記突起部を相手側の対向面に当接させる工程と、
この状態で上記第1および第2の金属部材を接近方向に加圧しつつ通電することにより、上記突起部と相手側の対向面との接触部を接合するとともに、上記円筒部および嵌合孔の各周面どうしの接触部を接合する工程とを含むことを特徴とする金属部材の接合方法。
A first metal member having a main body portion having a predetermined thickness and a cylindrical portion protruding from the main body portion and a second metal member having a fitting hole into which the cylindrical portion of the first metal member is inserted are energized. It is a method of joining with resistance heat by,
Providing a protrusion having a predetermined height on either the wall surface of the main body of the first metal member or the opposing surface of the second metal member facing the main body;
Inserting the cylindrical portion of the first metal member into the fitting hole of the second metal member to bring each peripheral surface into contact with each other, and bringing the protruding portion into contact with the opposing surface;
In this state, the first and second metal members are energized while being pressed in the approaching direction, thereby joining the contact portion between the protruding portion and the opposing surface on the other side, and the cylindrical portion and the fitting hole. And a step of joining the contact portions of the peripheral surfaces to each other.
請求項1記載の金属部材の接合方法において、
上記第1および第2の金属部材の加圧および通電を、両金属部材を挟んで対向配置される一対の電極を用いて行うことを特徴とする金属部材の接合方法。
In the joining method of the metal member of Claim 1,
A method for joining metal members, wherein the pressurization and energization of the first and second metal members are performed using a pair of electrodes arranged opposite to each other with both metal members interposed therebetween.
請求項1または2記載の金属部材の接合方法において、
上記第1金属部材が変速機用のギアであり、上記第2金属部材がシンクロコーンであることを特徴とする金属部材の接合方法。
In the joining method of the metal member of Claim 1 or 2,
The metal member joining method, wherein the first metal member is a gear for a transmission, and the second metal member is a synchro cone.
請求項3記載の金属部材の接合方法において、
上記ギアおよびシンクロコーンのいずれか一方に、上記突起部よりも径方向外側に位置するリング状の受け部を形成し、上記ギアとシンクロコーンとの接合完了時に、上記受け部を上記シンクロコーンの壁面に当接させることを特徴とする金属部材の接合方法。
In the joining method of the metal member of Claim 3,
Either one of the gear and the synchro cone is formed with a ring-shaped receiving portion positioned radially outward from the protruding portion, and when the joining of the gear and the synchro cone is completed, the receiving portion is attached to the synchro cone. A method for joining metal members, wherein the metal members are brought into contact with a wall surface.
JP2008111637A 2008-04-22 2008-04-22 Method for joining metal members Expired - Fee Related JP5136184B2 (en)

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