JP2824408B2 - How to join metal parts - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は金属部品の接合方法に係
り、特に、一方の部品を他方の金属部品に挿通可能に構
成し、両者を接合する場合に好適な接合方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining metal parts, and more particularly to a joining method suitable for connecting one part to another metal part and joining the two parts.

【０００２】[0002]

【従来の技術】従来、少なくとも一方が金属製の２つの
部品を接合する場合には、接着剤を用いて接着する方法
やスポット溶接等のように溶着させる方法があり、これ
らの方法は、部品をそのままの状態で固着することがで
きる点で好ましいが、接着剤の充填状態や溶接状態によ
って接合強度が著しく変化する可能性があり、接合の信
頼性を得ることが困難であるという問題点がある。2. Description of the Related Art Conventionally, when two parts, at least one of which are made of metal, are joined together, there are a method of bonding using an adhesive and a method of welding such as spot welding. Is preferable because it can be fixed as it is, but there is a possibility that the bonding strength may change significantly depending on the filling state of the adhesive or the welding state, and it is difficult to obtain the reliability of the bonding. is there.

【０００３】これに対して、金属部品を塑性変形させて
カシメ固定する方法は、カシメ部を予め特定の形状に形
成しておき、プレス等によって当該部分を変形させて他
の部品と係合させるものである。したがって、事前の加
工処理が必要な反面、信頼性の高い接合状態を得ること
ができる。On the other hand, in the method of caulking and fixing a metal component by plastic deformation, a caulking portion is formed in a specific shape in advance, and the portion is deformed by a press or the like to engage with another component. Things. Therefore, although a prior processing is required, a highly reliable bonding state can be obtained.

【０００４】カシメ固定する方法の中の一方法として、
軸状部材と、この軸状部材を挿通させる貫通孔を備えた
金属製の管状部材との接合を行う場合に、まず、図７に
示すように軸状部材３の周面に環状の表面溝３１，３２
を断面矩形状に形成し、次に、軸状部材３を管状部材４
の貫通孔４１に挿通させた状態で、管状部材４の端面４
ａ，４ｂにプレス加工により環状の凹部４２，４３を形
成することによって、管状部材４を塑性変形させて、そ
の肉を軸状部材３の表面溝３１，３２内に移動させる方
法がある。このようにして、管状部材４の肉が軸状部材
３の表面溝３１，３２に係合するため、軸状部材３と管
状部材４とを比較的強固に接合することができる。One of the methods of caulking is as follows:
When joining a shaft-shaped member and a metal tubular member provided with a through hole through which the shaft-shaped member is inserted, first, as shown in FIG. 31, 32
Is formed in a rectangular cross section, and then the shaft-like member 3 is
The end face 4 of the tubular member 4 is inserted into the through hole 41 of
There is a method in which annular concave portions 42 and 43 are formed in a and 4b by press working so that the tubular member 4 is plastically deformed and its thickness is moved into the surface grooves 31 and 32 of the shaft-shaped member 3. In this manner, the flesh of the tubular member 4 is engaged with the surface grooves 31 and 32 of the shaft member 3, so that the shaft member 3 and the tubular member 4 can be relatively firmly joined.

【０００５】[0005]

【発明が解決しようとする課題】上記従来の塑性変形に
よる接合方法では、比較的大きな接合力を得ることがで
きるとともに、外部に接合による痕跡を比較的残さない
（管状部材４の端面４ａ，４ｂに形成された凹部４１，
４２を除いて外観上には現れない。）ため、接合部品の
形状に制約がある場合に好適である。しかし、この接合
方法では、断面矩形状の表面溝３１，３２の内部に管状
部材４の肉が嵌合しているために接合強度が高くなるよ
うであるが、実際には、嵌合状態が充分ではなく、比較
的小さな応力を加えると初期ズレが発生し、その後ある
程度の応力までは耐えうるが、やがて嵌合部が破壊され
て破損するという問題点がある。According to the above-mentioned conventional joining method by plastic deformation, a relatively large joining force can be obtained and relatively no trace of joining is left outside (the end faces 4a and 4b of the tubular member 4). Recess 41 formed in
Except for 42, it does not appear on the appearance. Therefore, it is suitable when the shape of the joint component is restricted. However, in this joining method, although the thickness of the tubular member 4 fits inside the surface grooves 31 and 32 having a rectangular cross section, the joining strength seems to be high. When the stress is not sufficient and a relatively small stress is applied, an initial displacement occurs, and a certain level of stress can be tolerated thereafter, but there is a problem that the fitting portion is eventually broken and damaged.

【０００６】そこで本発明は上記問題点を解決するもの
であり、その課題は、上記のような軸状部材と管状部材
との接合に際して、初期ズレを防止するとともに破壊限
界強度を従来よりも向上させることにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to prevent the initial displacement and improve the breaking limit strength as compared with the prior art when joining the shaft-like member and the tubular member as described above. To make it happen.

【０００７】[0007]

【課題を解決するための手段】上記課題を解決するため
に本発明が講じた手段は、挿通部品と、該挿通部品に挿
通される被挿通金属部品とを接合させるために、前記挿
通部品における前記被挿通金属部品に対向する外面上で
あって前記被挿通金属部品の端縁部の近傍に断面略Ｖ字
状の表面溝を形成し、前記被挿通金属部品の前記端縁部
に応力を加えて塑性変形させ、前記被挿通金属部品の変
形部分を前記表面溝に係合させて接合する金属部品の接
合方法において、前記端縁部には、前記応力を加えるこ
とにより環状の凹溝を設け、該凹溝における前記挿通部
品側の内側及び外側の側面がその挿通方向に対して傾斜
するように形成し、前記凹溝における前記内側の側面の
前記挿通部品の挿通方向に対する傾斜角を大きく設定
し、反対側の外側の側面の前記傾斜角を小さく形成した
ことを特徴とする。Means taken by the present invention in order to solve the above-mentioned problems are as follows. In order to join an inserted component and a metal component to be inserted that is inserted into the inserted component, the present invention relates to A surface groove having a substantially V-shaped cross section is formed on the outer surface facing the inserted metal component and near the edge of the inserted metal component, and stress is applied to the edge of the inserted metal component. In addition, in the method of joining metal parts by plastically deforming and joining the deformed portion of the inserted metal part by engaging the deformed part with the surface groove, the edge portion is formed with an annular groove by applying the stress. provided, formed such that the inner and outer sides of the insertion part side of the recessed groove is inclined with respect to the insertion direction, increasing the inclination angle with respect to the insertion direction of the insertion part of the inner side surface of the groove Set and opposite outer Characterized in that formed small the inclination angle of the surface.

【０００８】ここで、前記表面溝の略Ｖ字状の断面の底
端部を曲面状若しくは平面状にカットした形状に形成す
ることが好ましい。Here, it is preferable to form the surface groove into a shape obtained by cutting the bottom end of the substantially V-shaped cross section into a curved surface or a plane.

【０００９】[0009]

【００１０】[0010]

【００１１】請求項１によれば、被挿通金属部品に凹溝
を形成する場合に、凹溝の挿通部品側の内側の側面を挿
通方向に対して傾斜するように形成することにより、被
挿通金属部品の素材を表面溝の側へ直接押し込むことが
できるので、表面溝との密着性の良い係合状態を確実か
つ再現性良く実現することができ、さらに、凹溝の挿通
部品側の内側の側面の傾斜角を大きく、反対側の外側の
側面の傾斜角を小さくすることにより、被挿通金属部品
における表面溝に対向する部分を塑性変形により確実に
表面溝に係合させることができる一方、その他の被挿通
金属部品の形状、特にその外径等の変形を最小限に抑制
することができる。According to the first aspect, when a concave groove is formed in the metal component to be inserted, the inner side surface of the concave groove on the component side is formed so as to be inclined with respect to the insertion direction. Since the material of the metal part can be pushed directly into the surface groove, it is possible to reliably and reproducibly achieve an engagement with good adhesion to the surface groove. By increasing the inclination angle of the side surface of the metal part and decreasing the inclination angle of the outer side surface on the opposite side, the part of the inserted metal part facing the surface groove can be securely engaged with the surface groove by plastic deformation. In addition, it is possible to minimize the deformation of the shape of the other inserted metal parts, particularly the outer diameter thereof.

【００１２】請求項２によれば、表面溝の底端部を曲面
状若しくは平面状にカットした形状とすることにより、
充填される被挿通金属部品の素材の接触面積がさらに増
大して非接触部を殆ど無くすことができるので、破壊強
度をさらに向上させることができる。According to the second aspect, by forming the bottom end of the surface groove into a curved or planar shape,
Since the contact area of the material of the inserted metal component to be filled is further increased and the non-contact portion can be almost eliminated, the breaking strength can be further improved.

【００１３】[0013]

【００１４】[0014]

【００１５】[0015]

【実施例】次に、図面を参照して本発明に係る金属部品
の接合方法の実施例を説明する。この接合方法において
は、図１に示すように、軸状部材１の周面に予め表面溝
１１，１２を形成する。この表面溝１１，１２は断面略
Ｖ字状であり、約９０〜１００度程度の開き角を備えて
いる。表面溝１１，１２には、それぞれ傾斜した２つの
側面部１１ａ，１１ｂと、これらの側面部１１ａ，１１
ｂの間に小さな幅で形成された底面部１１ｃとが設けら
れている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for joining metal parts according to the present invention will be described with reference to the drawings. In this joining method, as shown in FIG. 1, surface grooves 11 and 12 are formed in advance on the peripheral surface of the shaft-like member 1. The surface grooves 11, 12 have a substantially V-shaped cross section, and have an opening angle of about 90 to 100 degrees. The surface grooves 11 and 12 each have two inclined side surfaces 11a and 11b, and these side surfaces 11a and 11b.
The bottom part 11c formed with a small width is provided between b.

【００１６】一方、管状部材２は、中心に軸状部材１を
ほぼぴったりと挿通するような貫通孔２１を備えてお
り、この貫通孔２１の初期の内面は円筒面になってい
る。この貫通孔２１に軸状部材１を挿通させて図２
（ａ）に示すような状態とし、この状態で前記表面溝１
１，１２が管状部材２の端面２ａ，２ｂの近傍に来るよ
うに、図２（ｂ）に示すプレスのダイ５に取付ける。こ
こで、表面溝１１，１２の形成位置は、管状部材２の端
面２ａ，２ｂの近傍で管状部材２の内部に隠れるように
予め設定されている。On the other hand, the tubular member 2 is provided with a through hole 21 at the center thereof so that the shaft member 1 can be inserted almost exactly, and the initial inner surface of the through hole 21 is a cylindrical surface. As shown in FIG.
(A), and in this state, the surface groove 1
2 (b) is attached to the die 5 of the press such that the tubes 1 and 12 are near the end surfaces 2a and 2b of the tubular member 2. Here, the formation positions of the surface grooves 11 and 12 are set in advance so as to be hidden inside the tubular member 2 near the end faces 2a and 2b of the tubular member 2.

【００１７】さらに、図２（ｂ）に示すように、ダイ５
に取付けられた２つの部品に対してプレスのパンチ６に
より圧力を加える。パンチ６には環状のリブ６ａが形成
されており、このリブ６ａが管状部材２の端面２ａを加
圧して、図１及び図２（ａ）に示す環状凹部２２が形成
される。この環状凹部２２の形成によって、管状部材２
が塑性変形し、上記表面溝１１内に管状部材２の肉が押
し出される。Further, as shown in FIG.
Is applied to the two parts mounted on the press by the punch 6 of the press. An annular rib 6a is formed on the punch 6, and the rib 6a presses the end face 2a of the tubular member 2 to form an annular recess 22 shown in FIGS. 1 and 2A. The formation of the annular recess 22 allows the tubular member 2
Is plastically deformed, and the flesh of the tubular member 2 is extruded into the surface groove 11.

【００１８】同様の工程により、管状部材２の反対側の
端面２ｂにも同様の環状凹部２３が形成され、これによ
って、環状部材２の肉が表面溝１２内にも押し出され
る。このようにして、本実施例においては、軸状部材１
と管状部材２とは、軸状部材１の表面溝１１，１２と、
この表面溝１１，１２内に押し出された管状部材２の突
出部との係合によってしっかりと固定される。なお、例
えば上記ダイ５にも上記リブ６ａと同様のリブを設ける
ことにより、環状凹部２２と２３を一つのプレス工程若
しくは鍛造工程において同時に形成することも可能であ
る。By the same process, a similar annular concave portion 23 is formed on the opposite end surface 2 b of the tubular member 2, whereby the flesh of the annular member 2 is extruded into the surface groove 12. Thus, in the present embodiment, the shaft-like member 1
And the tubular member 2 are formed by surface grooves 11, 12 of the shaft-like member 1,
It is firmly fixed by the engagement with the protrusion of the tubular member 2 pushed into the surface grooves 11 and 12. Note that, for example, by providing the die 5 with ribs similar to the ribs 6a, the annular concave portions 22 and 23 can be formed simultaneously in one pressing step or forging step.

【００１９】本実施例における係合部と従来の矩形断面
の係合部との相違を、図１及び図７を参照して以下に説
明する。従来の矩形断面の表面溝３１，３２において
は、その側面部が軸状部材３の軸線に対してほぼ垂直に
形成されているため、軸状部材３と管状部材４との軸線
方向の接合強度が高くなるように思われがちであるが、
実際には表面溝３１，３２内に管状部材２の肉が完全に
充填され難く、図７に示すように、表面溝３１，３２の
矩形断面に対して、管状部材４の肉は山形に押し出され
る。したがって、表面溝３１，３２の開口縁部と管状部
材４の山形の肉とは、極端な場合には断面形状として点
接触（実際には線接触）になる。The difference between the engaging portion in this embodiment and the conventional engaging portion having a rectangular cross section will be described below with reference to FIGS. In the conventional surface grooves 31 and 32 having a rectangular cross section, the side surface portions are formed substantially perpendicular to the axis of the shaft-like member 3, so that the joint strength between the shaft-like member 3 and the tubular member 4 in the axial direction is formed. Tend to be higher,
Actually, it is difficult to completely fill the surface grooves 31 and 32 with the flesh of the tubular member 2. As shown in FIG. 7, the flesh of the tubular member 4 is extruded in a mountain shape with respect to the rectangular cross section of the surface grooves 31 and 32. It is. Therefore, the opening edges of the surface grooves 31 and 32 and the chevron-shaped meat of the tubular member 4 have a point contact (actually a line contact) as a cross-sectional shape in an extreme case.

【００２０】このことにより、軸状部材３と管状部材４
との間に、軸状部材３の軸線方向に応力を加えると、表
面溝３１，３２の開口縁部と管状部材４の山形部との接
触部が崩れて、軸状部材３と管状部材４とが相対的に僅
かに移動する現象（初期ズレ）が発生する。この初期ズ
レは僅かなものであるが、接合部品の寸法を狂わせ、構
成機構に致命的な欠陥をもたらす。As a result, the shaft member 3 and the tubular member 4
When stress is applied in the axial direction of the shaft-like member 3 between the shaft member 3 and the tubular member 4, the contact between the opening edges of the surface grooves 31 and 32 and the chevron of the tubular member 4 is broken. And a phenomenon (initial misalignment) in which. This initial displacement, albeit slight, can upset the dimensions of the joined parts and cause catastrophic defects in the construction.

【００２１】一方、本実施例の場合には、図１に示すよ
うに、略Ｖ字状の表面溝１１，１２が軸状部材１に形成
されているので、表面溝１１，１２の内部に管状部材２
の素材が入り込み易くなっている。管状部材２は鍛造用
の金属材料で構成されることが好ましいが、鍛造用材料
ではなくても、金属材料でさえあれば所定の延性により
表面溝１１，１２の内部にはほぼ完全に管状部材２の素
材を充填させることが可能である。このようにして本実
施例においては、表面溝１１，１２内において管状部材
２との接触面積が従来よりも増大するので、初期ズレが
発生しないとともに、最終的な破壊強度も大幅に高ま
る。On the other hand, in the case of this embodiment, as shown in FIG. 1, the substantially V-shaped surface grooves 11, 12 are formed in the shaft-like member 1, so that the inside of the surface grooves 11, 12 is formed. Tubular member 2
Material is easy to enter. The tubular member 2 is preferably made of a metal material for forging. However, even if it is not a material for forging, as long as the metal material is used, the tubular member 2 is almost completely formed inside the surface grooves 11 and 12 by a predetermined ductility. It is possible to fill the second material. In this way, in the present embodiment, since the contact area with the tubular member 2 in the surface grooves 11 and 12 is larger than that in the related art, the initial displacement does not occur and the ultimate breaking strength is greatly increased.

【００２２】この場合、表面溝１１，１２に底面部１１
ｃ，１２ｃを設けることにより、管状部材２の素材の充
填性がさらに向上し、接合強度をさらに向上させること
ができる。この底面部１１ｃ，１２ｃの底面部の幅は表
面溝の開口幅よりもかなり小さくてもよく、また、平面
状でなくても、曲面状に形成されていてもよい。本実施
例は底面部１１ｃ，１２ｃの形成により、表面溝１１，
１２の側面及び底面の相互角は全て鈍角となり、金属の
塑性変形による充填性が向上している。In this case, the bottom grooves 11 are formed in the surface grooves 11 and 12.
By providing c and 12c, the filling property of the material of the tubular member 2 is further improved, and the joining strength can be further improved. The width of the bottom surface portion of each of the bottom surface portions 11c and 12c may be considerably smaller than the opening width of the surface groove, and may not be flat but may be formed in a curved shape. In this embodiment, the bottom grooves 11c and 12c are formed to form the surface grooves 11,
12, the mutual angles of the side surfaces and the bottom surface are all obtuse angles, and the filling property by plastic deformation of the metal is improved.

【００２３】表面溝１１，１２の略Ｖ字形状は、管状部
材２の材質や、表面溝の形成位置によって適宜設定する
必要があるが、一般的には、表面溝１１，１２の側面の
傾斜角が４５度若しくはこれよりやや大きくすることが
好ましく、Ｖ字の開き角としては、９０〜１００度の範
囲とすることが好ましい。The substantially V-shape of the surface grooves 11 and 12 needs to be appropriately set depending on the material of the tubular member 2 and the position where the surface grooves are formed. The angle is preferably 45 degrees or slightly larger, and the opening angle of the V-shape is preferably in the range of 90 to 100 degrees.

【００２４】上記実施例において、プレス等により形成
される環状凹部２２，２３の形状としては、管状部材２
を塑性変形させて表面溝１１，１２の内部に係合させれ
ば足りるため、本来、任意の形状でよい。しかし、管状
部材２の全体形状に対する変形量をなるべく少なくし、
しかも、表面溝１１，１２の内部に移動する部分を確保
しようとすると、図１に示すように、軸状部材１の軸線
方向に直交する方向、即ち本実施例の場合には管状部材
２の端面２ａ，２ｂに対して、外側の側面２２ａを急角
度とし（挿通方向乃至は軸線方向を基準とする傾斜角を
小さくし）、内側の側面２２ｂは緩い角度にする（挿通
方向乃至は軸線方向を基準とする傾斜角を大きくする）
ことにより、表面溝１１，１２に対しては充分に係合す
るように管状部材２の素材を表面溝に向かって押し出し
変形させる一方、管状部材２のその他の方向、例えば管
状部材２の外周方向に対しては、なるべく変形量が少な
くなるようにしている。In the above embodiment, the shape of the annular concave portions 22 and 23 formed by pressing or the like
Since it is sufficient to plastically deform and engage the inside of the surface grooves 11 and 12, any shape may be used. However, the amount of deformation of the tubular member 2 relative to the overall shape is reduced as much as possible,
Moreover, in order to secure a portion that moves inside the surface grooves 11 and 12, as shown in FIG. 1, a direction perpendicular to the axial direction of the shaft-like member 1, that is, in the case of the present embodiment, With respect to the end surfaces 2a and 2b, the outer side surface 22a is set at a steep angle (the inclination angle with respect to the insertion direction or the axial direction is reduced), and the inner side surface 22b is set at a gentle angle (the insertion direction or the axial direction). To increase the tilt angle based on
Thereby, the material of the tubular member 2 is extruded and deformed toward the surface groove so as to sufficiently engage with the surface grooves 11 and 12, while the other direction of the tubular member 2, for example, the outer circumferential direction of the tubular member 2 , The amount of deformation is reduced as much as possible.

【００２５】実際に環状凹部２２，２３を形成する際に
は、プレスの型内に接合部品を収容して加工するため、
例えば管状部材２の外周に合致したダイを用いてプレス
加工を行うことにより、管状部材２の外径に変化を来す
ことなく加工を行うことができる。同様に、管状部材２
の軸線方向の長さについても、プレス加工時に定まった
寸法に平打ちするように型を構成すれば、変形を防止し
て精度良く加工することができる。When the annular recesses 22 and 23 are actually formed, the joining parts are accommodated in a press die and processed.
For example, by performing press working using a die that matches the outer periphery of the tubular member 2, working can be performed without changing the outer diameter of the tubular member 2. Similarly, the tubular member 2
If the mold is configured so that the length in the axial direction is flattened to a dimension determined at the time of press working, deformation can be prevented and processing can be performed with high accuracy.

【００２６】図３は、上記実施例とは形状が異なる他の
実施例を示すものである。この実施例は、管状部材７を
リング状部材８に挿通した状態で接合する場合を示すも
のである。管状部材７の外周面には、環状に形成された
断面略Ｖ字状の表面溝７１が形成されている。リング状
部材８には、管状部材７を挿通する貫通孔８１が形成さ
れ、この貫通孔８１の内面は円筒面となっている。FIG. 3 shows another embodiment having a different shape from the above embodiment. This embodiment shows a case where the tubular member 7 is joined while being inserted into the ring-shaped member 8. On the outer peripheral surface of the tubular member 7, a surface groove 71 having a substantially V-shaped cross section is formed in an annular shape. The ring-shaped member 8 is formed with a through hole 81 through which the tubular member 7 is inserted, and the inner surface of the through hole 81 is a cylindrical surface.

【００２７】管状部材７をリング状部材８に挿通させた
状態で、リング状部材８の端面８ａにプレスによって環
状凹部８２を形成すると、上記実施例と同様にリング状
部材８が変形して表面溝７１内に係合する。ここで、リ
ング状部材８の厚さが薄くなっているため、図１に示す
実施例とは異なり、表面溝及び環状凹部を一組ずつ形成
している。このような構成でも充分な接合強度が得られ
る。When the annular concave portion 82 is formed by pressing the end surface 8a of the ring-shaped member 8 with the tubular member 7 inserted through the ring-shaped member 8, the ring-shaped member 8 is deformed and the It engages in the groove 71. Here, since the thickness of the ring-shaped member 8 is small, unlike the embodiment shown in FIG. 1, a pair of the surface groove and the annular concave portion are formed. Even with such a configuration, sufficient bonding strength can be obtained.

【００２８】この実施例においては、リング状部材８を
プレス加工によって形成すると、貫通孔８１の穿設方向
（即ち部材の軸線方向）に湾曲した形状となるが、上記
実施例と同様に、管状部材７との接合工程において、リ
ング状部材８をプレスで変形させる際に、環状凹部８２
の形成部分以外の端面８ａをも同時に平打ち加工するこ
とによって、リング状部材８の平坦度を得ることができ
る。このことにより、従来の平打ち加工工程において同
時に接合加工を施すことができるので、製造工程を増加
させずに接合することができるという利点を持つことと
なる。In this embodiment, when the ring-shaped member 8 is formed by press working, the ring-shaped member 8 has a curved shape in the direction in which the through holes 81 are formed (ie, the axial direction of the member). When the ring-shaped member 8 is deformed by pressing in the joining process with the member 7,
The flatness of the ring-shaped member 8 can be obtained by simultaneously flattening the end face 8a other than the portion where the ring-shaped member 8 is formed. Thus, since the joining process can be performed simultaneously in the conventional flat stamping process, there is an advantage that the joining can be performed without increasing the number of manufacturing processes.

【００２９】上記２つの実施例では、挿通部材である軸
状部材１又は管状部材７の外周面状に周回する表面溝を
形成したが、表面溝としては必ずしも周回形状にする必
要はなく、外周の一部分のみに任意の方向へ伸びるよう
に形成してもよい。また、挿通部材の形状は特に限定さ
れることなく、上記実施例のように断面円形の他、角
形、板形等、任意の形状とすることができる。さらに、
被挿通金属部材である管状部材２又はリング状部材８に
環状凹部を形成したが、これも環状に形成するのではな
く、表面溝の近傍に形成されるのであれば、任意の形状
に形成することができる。この形状は凹部ではなく、予
め凸部を被挿通金属部材の端面上に形成しておき、これ
を平坦化するようにプレスで押圧してもよい。In the above two embodiments, the surface groove is formed so as to go around the outer peripheral surface of the shaft-like member 1 or the tubular member 7 which is the insertion member. However, the surface groove is not necessarily required to have a circular shape. May be formed so as to extend in an arbitrary direction only in a part of. Further, the shape of the insertion member is not particularly limited, and may be an arbitrary shape such as a square shape or a plate shape in addition to the circular shape as in the above embodiment. further,
Although the annular concave portion is formed in the tubular member 2 or the ring-shaped member 8 which is the metal member to be inserted, the annular concave portion is not formed in an annular shape, but may be formed in an arbitrary shape as long as it is formed in the vicinity of the surface groove. be able to. In this shape, instead of the concave portion, a convex portion may be formed in advance on the end surface of the inserted metal member, and the convex portion may be pressed by a press so as to be flattened.

【００３０】図４は上記実施例により接合した接合部品
について、被挿通金属部材である管状部材２又はリング
状部材８を固定し、挿通部材である軸状部材１又は管状
部材７に軸線方向へ応力を加えた場合の加圧力と軸線方
向の変形量との関係を示すものである。図４（ａ）は従
来の断面矩形状の表面溝により係合させた接合部品に対
して計測したもの、図４（ｂ）は実施例の断面略Ｖ字状
の表面溝により係合させた接合部品に対して計測したも
のである。FIG. 4 shows a state in which the tubular member 2 or the ring-shaped member 8 as a metal member to be inserted is fixed to the joined parts joined by the above-described embodiment, and the shaft-like member 1 or the tubular member 7 as the inserted member is axially mounted. It shows the relationship between the pressing force when a stress is applied and the amount of deformation in the axial direction. FIG. 4 (a) shows the results measured with respect to a conventional joint part engaged with a surface groove having a rectangular cross-section, and FIG. 4 (b) shows the measurement performed with a surface groove having a substantially V-shaped cross-section according to the embodiment. It is measured for the joined parts.

【００３１】図４に示すように、従来の接合方法による
接合部品では、比較的低い加圧力において初期ズレＡが
発生するとともに、破壊強度Ｂも低いのに対し、本実施
例の接合方法で接合させた接合部品においては、初期ズ
レは全く発生せず、破壊強度Ｃもかなり向上している。As shown in FIG. 4, in the joined parts according to the conventional joining method, the initial displacement A occurs at a relatively low pressing force and the breaking strength B is low. In the joined parts, the initial displacement does not occur at all, and the breaking strength C is considerably improved.

【００３２】図５は、上記試験に使用した試験装置を示
す。この装置は、挿通部材Ｄに接合した被挿通金属部材
Ｅを支持する治具９１と、挿通部材Ｄに上方から応力を
加える加圧ロッド９２と、加圧ロッド９２の加圧力を測
定するためのロードセル９３と、ロードセル９３からの
検出信号を受けて加圧力を測定する測定装置９４とから
構成される。ここで、加圧ロッド９２は、図示しない加
圧装置により下方へ圧力を印加し、この圧力をゆっくり
と所定の変化率で増大させていくようになっている。FIG. 5 shows a test apparatus used for the above test. This apparatus includes a jig 91 for supporting the inserted metal member E joined to the insertion member D, a pressing rod 92 for applying a stress to the insertion member D from above, and a pressing force for measuring the pressing force of the pressing rod 92. The load cell 93 includes a load cell 93 and a measuring device 94 that measures a pressing force by receiving a detection signal from the load cell 93. Here, the pressure rod 92 applies a pressure downward by a pressure device (not shown), and gradually increases this pressure at a predetermined change rate.

【００３３】測定装置９４は、ロードセル９３によって
挿通部材Ｄに加えられた圧力を表示するとともに、最終
的に上記加圧装置によって次第に増加してゆく圧力の最
高値を得るように構成されており、加圧ロッド９２の圧
力が増加してやがて接合部品の接合部が破壊された場合
に、破壊時の最大加圧力の表示を保持することができ、
接合部品の接合部の破壊強度を求めることができる。The measuring device 94 is configured to display the pressure applied to the insertion member D by the load cell 93, and to finally obtain the maximum value of the pressure gradually increased by the pressing device. When the pressure of the pressure rod 92 increases and the joint of the joint component is eventually broken, the display of the maximum pressing force at the time of breaking can be maintained.
The breaking strength of the joint of the joined parts can be determined.

【００３４】上記試験装置を用いて、図６（ａ）に示す
接合部品を１０個試作し、これらの部品について上記破
壊強度を求めた結果を表１に示す。この接合部品は、挿
通部材Ｄを直径１２ｍｍの硫黄複合快削鋼製の軸状部材
とし、被挿通金属部材Ｅを２．０ｍｍの厚さの圧延鋼板
製のリング状部材としたものであって、表面溝の位置を
被挿通金属部材の端面から０．１５ｍｍの位置に溝の開
口部の端が来るように決め、表面溝の深さを０．３ｍ
ｍ、その底面部の幅を０．１ｍｍ、Ｖ字形状の開き角を
９５度としている。また、環状凹部の深さを０．３５〜
０．４５ｍｍ、外側の側面の傾斜角を７〜１０度、内側
の側面の傾斜角を４０〜５５度として、両側面部に挟ま
れた底面部の幅を０．３ｍｍとしている。なお、一方、
従来の接合方法を示す比較例として、上記表面溝を断面
矩形状にし、その他の条件を上記と同様にした場合につ
いても測定した。Using the above-described test apparatus, ten joint parts shown in FIG. 6 (a) were trial-produced, and the breaking strength of these parts was determined. Table 1 shows the results. In this joining part, the insertion member D is a shaft-shaped member made of sulfur-combined free-cutting steel having a diameter of 12 mm, and the inserted metal member E is a ring-shaped member made of a rolled steel plate having a thickness of 2.0 mm. The position of the surface groove is determined so that the end of the opening of the groove is located at a position of 0.15 mm from the end face of the inserted metal member, and the depth of the surface groove is 0.3 m.
m, the width of the bottom surface is 0.1 mm, and the opening angle of the V-shape is 95 degrees. In addition, the depth of the annular recess is 0.35 to 0.35.
0.45 mm, the inclination angle of the outer side surface is 7 to 10 degrees, the inclination angle of the inner side surface is 40 to 55 degrees, and the width of the bottom portion sandwiched between the both side surfaces is 0.3 mm. Meanwhile,
As a comparative example showing a conventional joining method, measurements were also made of a case where the surface groove was rectangular in cross section and other conditions were the same as above.

【００３５】[0035]

【表１】 破壊強度（ｋｇ） 部品番号 〔実施例〕 〔比較例〕 １ １２５７ ８５１ ２ １２５１ ８３９ ３ １２６０ ８４４ ４ １２５５ ８５２ ５ １２３５ ８４８ ６ １２８０ ８４６ ７ １２７８ ８４７ ８ １２８０ ８４４ ９ １２７６ ８４７ １０ １２７７ ８４６[Table 1] Breaking strength (kg) Part number [Example] [Comparative example]

【００３６】このデータからわかるように、全ての接合
部品において、破壊強度が５０％程度向上している。ま
た、比較例を用いた接合部品では初期ズレが観測された
のに対し、実施例を用いた全ての接合部品では初期ズレ
は全く観測されなかった。なお、表面溝と環状凹部との
容積比はほぼ１００％若しくは環状凹部の方がやや大き
くなる程度にすることが好ましい。表面溝の容積の方が
大きくなると充填不足による接合強度の低下を生じ、環
状凹部の容積の方が大きくなると被挿通金属部材の変形
が大きくなるという不都合を生じる。As can be seen from this data, the breaking strength of all the joint parts is improved by about 50%. In addition, the initial displacement was observed in the joined parts using the comparative examples, whereas no initial displacement was observed in all the joined parts using the examples. It is preferable that the volume ratio between the surface groove and the annular concave portion is approximately 100% or the extent that the annular concave portion is slightly larger. When the volume of the surface groove is larger, the joining strength is reduced due to insufficient filling, and when the volume of the annular concave portion is larger, there is a problem that the deformation of the inserted metal member is increased.

【００３７】上記と同様にして、図６（ｂ）に示す直径
６ｍｍの硫黄複合快削鋼製の軸状部材Ｄと厚さ１．６ｍ
ｍの冷間圧延鋼板製のリング状部材Ｅとの接合部品、図
６（ｃ）に示す直径３ｍｍで硬度Ｈｖ＝１１００のステ
ンレス鋼製の軸状部材Ｄと厚さ２０ｍｍの硫黄複合快削
鋼製の円筒部材Ｅとの接合部品、図６（ｄ）に示す直径
２５ｍｍの硫黄複合快削鋼製の軸状部材Ｄと厚さ２．９
ｍｍの冷間圧延鋼板製のリング状部材Ｅとの接合部品、
図６（ｅ）に示す直径４ｍｍで硬度Ｈｖ＝１１００のス
テンレス鋼製の軸状部材Ｄと厚さ２５ｍｍの硫黄複合快
削鋼製の円筒部材Ｅとの接合部品、及び図６（ｆ）に示
す直径８ｍｍの硫黄複合快削鋼製の軸状部材Ｄと厚さ
３．２ｍｍの冷間圧延鋼板製のリング状部材Ｅとの接合
部品について、それぞれ試験を行った。ここで、これら
の接合部品は上記図６（ａ）に示すものとほぼ同様の表
面溝及び環状凹部を設けることにより接合されたもので
ある。これらの接合部品の破壊強度を以下の表２に示
す。In the same manner as described above, a shaft-shaped member D made of sulfur-combined free-cutting steel having a diameter of 6 mm shown in FIG.
6C, a joint member with a ring-shaped member E made of a cold-rolled steel plate, a shaft-shaped member D made of stainless steel having a diameter of 3 mm and a hardness of Hv = 1100 shown in FIG. 6D, a cylindrical member E made of sulfur composite free-cutting steel having a diameter of 25 mm and a thickness of 2.9 shown in FIG.
mm cold-rolled steel plate ring-shaped member E,
FIG. 6F shows a joint between a stainless steel shaft member D having a diameter of 4 mm and a hardness Hv = 1100, and a cylindrical member E made of a 25 mm-thick sulfur composite free-cutting steel. Tests were conducted on the joint parts of the shown shaft-shaped member D made of sulfur-combined free-cutting steel having a diameter of 8 mm and the ring-shaped member E made of a cold-rolled steel plate having a thickness of 3.2 mm. Here, these joining parts are joined by providing surface grooves and annular recesses substantially similar to those shown in FIG. 6A. Table 2 below shows the fracture strengths of these joined parts.

【００３８】 破壊強度（ｋｇ） 部品番号 図６（ｂ） 図６（ｃ） 図６（ｄ） 図６（ｅ） 図６（ｆ） １ ３１１ ６１８ １８７０ ８１０ ５１０ ２ ３０７ ６１７ １８０２ ８１０ ５２１ ３ ３１８ ６１３ １８８６ ８１５ ５２０ ４ ３１２ ６１６ １８５４ ８１８ ５１９ ５ ３０９ ６１６ １８５５ ８１６ ５０６ ６ ３１８ ６１５ １８６０ ８２３ ５０９ ７ ３１７ ６０９ １８８７ ８２１ ５１０ ８ ３１２ ６０９ １８６６ ８１５ ５１２ ９ ３１３ ６０９ １８６９ ８１３ ５１３ １０ ３１３ ６１５ １８７１ ８１３ ５１３Breaking strength (kg) Part number FIG. 6 (b) FIG. 6 (c) FIG. 6 (d) FIG. 6 (e) FIG. 6 (f) 1 311 618 1870 810 510 2 307 617 1802 810 521 3 318 613 1886 815 520 4 312 616 1854 818 519 5 309 616 1855 816 506 6 318 615 1860 823 509 7 317 609 1887 821 510 8 312 609 13 18 13 13 13 18 13 815

【００３９】以上のデータに示した接合部品について
は、どのような構造の接合部品であっても、挿通部品と
被挿通部品との間の接合強度は従来の接合部品に対して
大幅に向上している。また、いずれの接合部品において
も、初期ズレは全く観測されなかった。このように上記
各実施例によれば、表面溝の断面形状を略Ｖ字状に形成
することにより、従来の接合方法よりも破壊強度を著し
く向上させることができるとともに、従来方法の欠点で
あった初期ズレを生じることがなく、低い応力化での寸
法精度の狂いも生じないという極めて顕著な効果を奏す
る。Regarding the joining components shown in the above data, the joining strength between the inserted component and the inserted component is greatly improved as compared with the conventional joining component, regardless of the joining component having any structure. ing. Also, no initial displacement was observed in any of the joined parts. As described above, according to each of the above embodiments, by forming the cross-sectional shape of the surface groove into a substantially V-shape, the breaking strength can be remarkably improved as compared with the conventional joining method, and this is a disadvantage of the conventional method. This has an extremely remarkable effect that no initial displacement occurs and no dimensional accuracy deviation occurs at low stress.

【００４０】[0040]

【発明の効果】以上説明したように本発明によれば以下
の効果を奏する。As described above, according to the present invention, the following effects can be obtained.

【００４１】請求項１によれば、被挿通金属部品に凹溝
を形成する場合に、凹溝の挿通部品側の内側の側面を挿
通方向に対して傾斜するように形成することにより、被
挿通金属部品の素材を表面溝の側へ直接押し込むことが
できるので、表面溝との密着性の良い係合状態を確実か
つ再現性良く実現することができ、さらに、凹溝の挿通
部品側の内側の側面の傾斜角を大きく、反対側の外側の
側面の傾斜角を小さくすることにより、被挿通金属部品
における表面溝に対向する部分を塑性変形により確実に
表面溝に係合させることができる一方、その他の被挿通
金属部品の形状、特にその外径等の変形を最小限に抑制
することができる。According to the first aspect, when a concave groove is formed in the metal component to be inserted, the inner side surface of the concave groove on the component side is formed so as to be inclined with respect to the insertion direction. Since the material of the metal part can be pushed directly into the surface groove, it is possible to reliably and reproducibly achieve an engagement with good adhesion to the surface groove. By increasing the inclination angle of the side surface of the metal part and decreasing the inclination angle of the outer side surface on the opposite side, the part of the inserted metal part facing the surface groove can be securely engaged with the surface groove by plastic deformation. In addition, it is possible to minimize the deformation of the shape of the other inserted metal parts, particularly the outer diameter thereof.

【００４２】請求項２によれば、表面溝の底端部を曲面
状若しくは平面状にカットした形状とすることにより、
充填される被挿通金属部品の素材の接触面積がさらに増
大して非接触部を殆ど無くすことができるので、破壊強
度をさらに向上させることができる。According to the second aspect, by forming the bottom end of the surface groove into a curved or planar shape,
Since the contact area of the material of the inserted metal component to be filled is further increased and the non-contact portion can be almost eliminated, the breaking strength can be further improved.

【００４３】[0043]

【００４４】[0044]

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係る金属部品の接合方法の実施例を適
用した接合部の構造を示す拡大断面図である。FIG. 1 is an enlarged cross-sectional view showing a structure of a joint to which an embodiment of a method for joining metal parts according to the present invention is applied.

【図２】同実施例により接合した接合部品の外観形状を
示す斜視図（ａ）及び接合時の様子を示す概略断面図
（ｂ）である。FIGS. 2A and 2B are a perspective view showing an external shape of a joined component joined by the embodiment and a schematic sectional view showing a state at the time of joining.

【図３】異なる形状を有する部品に実施例を適用した場
合を示す接合部品の斜視図（ａ）及び断面図（ｂ）であ
る。FIGS. 3A and 3B are a perspective view and a cross-sectional view, respectively, showing a case where the embodiment is applied to parts having different shapes.

【図４】接合部品に圧力を加えた場合の加圧力と変形量
（接合部品間の位置ズレ）との関係を示すグラフであっ
て、従来の接合方法を用いて接合した接合部品に対する
もの（ａ）及び実施例によって接合した接合部品に対す
るもの（ｂ）である。FIG. 4 is a graph showing a relationship between a pressing force when a pressure is applied to a bonded part and a deformation amount (a positional deviation between the bonded parts), for a bonded part bonded using a conventional bonding method ( (a) and (b) for the joined parts joined according to the example.

【図５】接合部品の破壊強度を測定するための試験装置
を示す説明図である。FIG. 5 is an explanatory view showing a test device for measuring the breaking strength of a joint component.

【図６】試験を行った接合部品の形状を示す断面図
（ａ）〜（ｆ）である。6 (a) to 6 (f) are cross-sectional views showing the shapes of the joint parts subjected to the test.

【図７】従来の接合方法を用いた接合部を示す拡大断面
図である。FIG. 7 is an enlarged cross-sectional view showing a joint using a conventional joining method.

【符号の説明】 １ 軸状部材 ２ 管状部材 ５ ダイ ６ パンチ ７ 管状部材 ８ リング状部材 １１，１２，７１ 表面溝 ２２，２３，８２ 環状凹部DESCRIPTION OF SYMBOLS 1 Shaft-shaped member 2 Tubular member 5 Die 6 Punch 7 Tubular member 8 Ring-shaped member 11, 12, 71 Surface groove 22, 23, 82 Annular concave portion

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 挿通部品と、該挿通部品に挿通される被
挿通金属部品とを接合させるために、前記挿通部品にお
ける前記被挿通金属部品に対向する外面上であって前記
被挿通金属部品の端縁部の近傍に断面略Ｖ字状の表面溝
を形成し、前記被挿通金属部品の前記端縁部に応力を加
えて塑性変形させ、前記被挿通金属部品の変形部分を前
記表面溝に係合させて接合する金属部品の接合方法にお
いて、 前記端縁部には、前記応力を加えることにより環状の凹
溝を設け、該凹溝における前記挿通部品側の内側及び外
側の側面がその挿通方向に対して傾斜するように形成
し、 前記凹溝における前記内側の側面の前記挿通部品の挿通
方向に対する傾斜角を大きく設定し、反対側の外側の側
面の前記傾斜角を小さく形成したことを特徴とする金属
部品の接合方法。An object for joining an inserted component and a metal component to be inserted that is inserted into the inserted component, on the outer surface of the inserted component facing the inserted metal component, and A surface groove having a substantially V-shaped cross section is formed in the vicinity of the edge, and a stress is applied to the edge of the inserted metal component to plastically deform the deformed portion of the inserted metal component in the surface groove. In the joining method of a metal component to be engaged and joined, an annular concave groove is provided in the edge portion by applying the stress, and inside and outside of the concave groove on the side of the insertion component.
Formed to the side surface of the side is inclined with respect to the insertion direction, the set increasing the inclination angle with respect to the insertion direction of the insertion part of the side surface of the inner side of the groove, the inclination angle of the outer side surface of the opposite side A method for joining metal parts, characterized by forming a small size. 【請求項２】 請求項１において、前記表面溝の略Ｖ字
状の断面の底端部を曲面状若しくは平面状にカットした
形状に形成することを特徴とする金属部品の接合方法。2. The method for joining metal parts according to claim 1, wherein the bottom end of the substantially V-shaped cross section of the surface groove is cut into a curved surface or a planar shape.