JP2009176673A - Crimp terminal for aluminum electric wire - Google Patents

Crimp terminal for aluminum electric wire Download PDF

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JP2009176673A
JP2009176673A JP2008016604A JP2008016604A JP2009176673A JP 2009176673 A JP2009176673 A JP 2009176673A JP 2008016604 A JP2008016604 A JP 2008016604A JP 2008016604 A JP2008016604 A JP 2008016604A JP 2009176673 A JP2009176673 A JP 2009176673A
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aluminum
conductor portion
barrel
wire
crimped
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JP5119532B2 (en
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Yasumichi Kuwayama
康路 桑山
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Yazaki Corp
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Yazaki Corp
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Priority to PCT/JP2009/051826 priority patent/WO2009096590A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/188—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp style terminal for aluminum electric wire, capable of realizing both reduction in the contact resistance between a conductor part of the aluminum wire and a barrel of a terminal, and securing crimping strength. <P>SOLUTION: The terminal 10 is provided with a barrel 13 which holds a conductor part 2 of the aluminum wire and is caulked to the conductor part 2. A film having adhesion action to aluminum and aluminum alloy is formed on the contact face of the barrel 13, in contact with the conductor part 2, and a plurality of grooves 24, which extend in a direction of crossing the axial direction of the crimping portion of the conductor part 2, to which the barrel 13 is caulked are formed there. The inner side face 24a of each groove 24, facing the top end side of the crimping portion of the conductor part 2 or the inner side face 24b of each groove 24 facing the base end side, is made an inclined face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、アルミニウム製またはアルミニウム合金製の複数の素線が撚り合わされた導体部を有するアルミ電線に圧着されるアルミ電線用圧着端子に関する。   The present invention relates to a crimp terminal for an aluminum wire that is crimped to an aluminum wire having a conductor portion in which a plurality of strands made of aluminum or aluminum alloy are twisted together.

自動車等の車両に配索されるワイヤハーネスには銅電線が一般に使用されている。そして、ワイヤハーネス同士、あるいはワイヤハーネスと車載機器との接続にあたり、ワイヤハーネスの銅電線には端子が取り付けられる。そして、この種の端子は、一般に圧着によって銅電線に取り付けられている。   Copper wires are generally used for wire harnesses routed in vehicles such as automobiles. And a terminal is attached to the copper electric wire of a wire harness in connection between wire harnesses or a wire harness and vehicle equipment. And this kind of terminal is generally attached to the copper electric wire by crimping.

銅電線に圧着される端子は、例えば銅合金等の導電性の板材を所定の形状に打ち出し、これを折り曲げ加工して形成されており、典型的には、断面略Ｕ字状に成形されたバレルを備えている。バレルは、銅製の複数の素線を撚り合わせてなる銅電線の導体部を抱え込み、導体部に加締め付けられる。それにより、銅電線と端子とが圧着される。   The terminal to be crimped to the copper electric wire is formed by punching a conductive plate material such as a copper alloy into a predetermined shape and bending it, and is typically formed in a substantially U-shaped cross section. Has a barrel. The barrel holds a conductor portion of a copper electric wire formed by twisting a plurality of copper wires, and is crimped to the conductor portion. Thereby, a copper electric wire and a terminal are crimped | bonded.

ところで近年、銅資源の不足に加え、車両の軽量化やリサイクルの容易性を考慮して、アルミ電線が注目されている。しかしながら、アルミニウムは銅に比べて表面に形成される酸化皮膜が厚い。そのため、アルミ電線の導体部と端子のバレルとの間の接触抵抗は比較的高くなる傾向にある。   By the way, in recent years, aluminum wires have been attracting attention in consideration of the shortage of copper resources and the weight reduction of vehicles and the ease of recycling. However, aluminum has a thicker oxide film formed on the surface than copper. Therefore, the contact resistance between the conductor portion of the aluminum electric wire and the terminal barrel tends to be relatively high.

接触抵抗の低減について、バレルを導体部に強く加締め付け、導体部の圧縮率を高くする方法が知られている。これによれば、導体部を構成する各素線の酸化皮膜が破壊され、導体部とバレルとの間の接触抵抗が低減される。尚、本明細書において、導体部の圧縮率とは、圧着前の導体部の断面積に対する圧着後の導体部の断面積の比として規定される。   For reducing contact resistance, a method is known in which a barrel is strongly swaged to a conductor portion to increase the compressibility of the conductor portion. According to this, the oxide film of each strand which comprises a conductor part is destroyed, and the contact resistance between a conductor part and a barrel is reduced. In the present specification, the compression ratio of the conductor portion is defined as the ratio of the cross-sectional area of the conductor portion after crimping to the cross-sectional area of the conductor portion before crimping.

しかしながら、導体部の圧縮率を高くすることに伴い導体部に作用する応力も高くなる。アルミニウムは銅に比べて機械的強度に劣り、アルミ電線では、導体部に過度の応力が作用すると、導体部とバレルとの圧着強度が著しく低下してしまう。   However, as the compressibility of the conductor portion increases, the stress acting on the conductor portion also increases. Aluminum is inferior in mechanical strength compared to copper, and in an aluminum electric wire, when excessive stress acts on the conductor portion, the crimping strength between the conductor portion and the barrel is significantly reduced.

接触抵抗の低減および圧着強度の確保のため、アルミ電線と端子との圧着に関し種々提案がなされている。例えば、導体部と接触するバレルの接触面に複数の凹溝を形成することが提案されている（例えば、特許文献１、２参照）。導体部が凹溝に食い込み、各素線の表面の酸化皮膜が破壊されて接触抵抗が低減され、また、導体部の抜けが防止される。また、バレルの接触面に導体部より軟質の粉末を分散させて、バレルの接触面と導体部とを凝着させるようにしたものも提案されている（例えば、特許文献３参照）。
特開２００７−１７３２１５号公報 特開２００３−２４９２８４号公報 特開平８−３２１３３０号公報 Various proposals have been made regarding crimping of an aluminum electric wire and a terminal in order to reduce contact resistance and secure crimping strength. For example, it has been proposed to form a plurality of concave grooves on the contact surface of the barrel that contacts the conductor portion (see, for example, Patent Documents 1 and 2). A conductor part bites into a ditch | groove, the oxide film of the surface of each strand is destroyed, contact resistance is reduced, and the dropout of a conductor part is prevented. Further, there has also been proposed a method in which soft powder is dispersed from the conductor portion on the contact surface of the barrel so that the contact surface of the barrel and the conductor portion adhere to each other (for example, see Patent Document 3).
JP 2007-173215 A JP 2003-249284 A JP-A-8-321330

バレルの接触面と導体部とを凝着をせる場合にも、各素線の表面の酸化被膜を破壊して、各素線に新生面を露出させる必要がある。バレルの接触面に凹溝を形成することにより各素線の表面の酸化被膜を破壊することができるが、酸化被膜の破壊は主として凹溝のエッジ部分で生じており、酸化被膜の破壊が十分ではない。そして、従来の凹溝で酸化被膜を十分に破壊するためには、導体部の圧縮率を高くする必要があり、圧着強度の低下が問題となる。   Even when the contact surface of the barrel and the conductor are adhered, it is necessary to break the oxide film on the surface of each strand and expose the new surface to each strand. By forming a groove on the contact surface of the barrel, the oxide film on the surface of each strand can be destroyed. However, the oxide film is broken mainly at the edge of the groove, and the oxide film is sufficiently broken. is not. And in order to fully destroy an oxide film with the conventional ditch | groove, it is necessary to make the compression rate of a conductor part high, and the fall of crimping | compression-bonding intensity | strength becomes a problem.

本発明は、上述した事情に鑑みてなされたものであり、アルミ電線の導体部と端子のバレルとの接触抵抗の低減および圧着強度の確保を両立させることができるアルミ電線用圧着端子を提供することを目的とする。   This invention is made | formed in view of the situation mentioned above, and provides the crimp terminal for aluminum electric wires which can make reduction of the contact resistance of the conductor part of an aluminum electric wire and the barrel of a terminal, and ensuring of crimping | compression-bonding strength compatible. For the purpose.

上記目的は、下記（１）〜（４）に記載のアルミ電線圧着端子により達成される。
（１）アルミニウム製またはアルミニウム合金製の複数の素線が撚り合わされた導体部を有するアルミ電線に圧着されるアルミ電線用圧着端子であって、前記導体部を抱え込んで該導体部に加締め付けられるバレルを備え、前記導体部と接触する前記バレルの接触面に、アルミニウムおよび前記アルミニウム合金に対して凝着作用を有する被膜が形成されており且つ、前記バレルが加締め付けられる前記導体部の圧着部分の軸方向と交差する方向に並列に延びる複数の溝が形成されており、前記導体部の前記圧着部分の先端側に向く前記各溝の内側面が、先端側に向けて下り勾配となる傾斜面となっていることを特徴とするアルミ電線用圧着端子。
（２）アルミニウム製またはアルミニウム合金製の複数の素線が撚り合わされた導体部を有するアルミ電線に圧着されるアルミ電線用圧着端子であって、前記導体部を抱え込んで該導体部に加締め付けられるバレルを備え、前記導体部と接触する前記バレルの接触面に、アルミニウムおよび前記アルミニウム合金に対して凝着作用を有する被膜が形成されており且つ、前記バレルが加締め付けられる前記導体部の圧着部分の軸方向と交差する方向に並列に延びる複数の溝が形成されており、前記導体部の前記圧着部分の基端側に向く前記各溝の内側面が、基端側に向けて下り勾配となる傾斜面となっていることを特徴とするアルミ電線用圧着端子。
（３）前記複数の溝が、前記導体部の前記圧着部分の外周面に表れる各素線と交差する方向に並列に延びていることを特徴とする（１）または（２）に記載のアルミ電線用圧着端子。
（４）前記バレルの接触面に形成された前記被膜が錫めっき被膜であることを特徴とする上記（１）〜（３）のいずれかに記載のアルミ電線用圧着端子。 The said objective is achieved by the aluminum electric wire crimp terminal as described in following (1)-(4).
(1) A crimp terminal for an aluminum wire that is crimped to an aluminum wire having a conductor portion in which a plurality of strands made of aluminum or aluminum alloy are twisted together, and is clamped to the conductor portion while holding the conductor portion A crimping portion of the conductor portion, which is provided with a barrel, is formed with a coating having an adhesion action on aluminum and the aluminum alloy on a contact surface of the barrel that is in contact with the conductor portion, and the barrel is crimped A plurality of grooves extending in parallel in a direction intersecting the axial direction of the conductor, and an inner surface of each of the grooves facing the distal end side of the crimping portion of the conductor portion is inclined downward toward the distal end side. A crimp terminal for aluminum wires, characterized by a flat surface.
(2) A crimp terminal for an aluminum wire that is crimped to an aluminum wire having a conductor portion in which a plurality of strands made of aluminum or an aluminum alloy are twisted together, and is clamped to the conductor portion while holding the conductor portion A crimping portion of the conductor portion, which is provided with a barrel, is formed with a coating having an adhesion action on aluminum and the aluminum alloy on a contact surface of the barrel that is in contact with the conductor portion, and the barrel is crimped A plurality of grooves extending in parallel in a direction intersecting the axial direction of the conductor portion, and the inner surface of each groove facing the proximal end side of the crimping portion of the conductor portion has a downward slope toward the proximal end side. A crimp terminal for an aluminum electric wire, characterized by having an inclined surface.
(3) The aluminum according to (1) or (2), wherein the plurality of grooves extend in parallel in a direction intersecting with each strand appearing on the outer peripheral surface of the crimp portion of the conductor portion. Crimp terminal for electric wires.
(4) The crimp terminal for an aluminum wire according to any one of (1) to (3), wherein the coating formed on the contact surface of the barrel is a tin plating coating.

上記（１）の構成のアルミ電線用圧着端子によれば、バレルが加締め付けられて圧縮された導体部は、各溝に食い込み、各溝に食い込んだ部位を基点に主として先端側に向けて伸ばされて、先端側に隣り合う溝の傾斜面を摺動する。そして、傾斜面を摺動する際の摩擦によって、導体部を構成する各素線の表面の酸化被膜が破壊され、各素線に新生面が露出する。これにより、導体部の圧縮率を過度に高めることなく、各素線の酸化被膜を十分に破壊して新生面を露出させることができる。そして、バレルの接触面にはアルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されており、各素線に露出した新生面と被膜との間で凝着が生じ、良好な接触抵抗および圧着強度を得ることができる。   According to the crimp terminal for an aluminum electric wire having the configuration of (1) above, the conductor portion compressed by the crimping of the barrel bites into each groove, and extends mainly toward the distal end side from the portion bitten into each groove. And slide on the inclined surface of the groove adjacent to the tip side. And the oxide film of the surface of each strand which comprises a conductor part is destroyed by the friction at the time of sliding an inclined surface, and a new surface is exposed to each strand. Thereby, the new surface can be exposed by sufficiently destroying the oxide film of each strand without excessively increasing the compressibility of the conductor portion. And the coating which has an adhesion action with respect to aluminum and aluminum alloy is formed in the contact surface of a barrel, adhesion arises between the new surface exposed to each strand, and a coating, good contact resistance and Crimp strength can be obtained.

上記（２）の構成のアルミ電線用圧着端子によれば、バレルが加締め付けられて圧縮された導体部は、各溝に食い込み、各溝に食い込んだ部位を基点に主として基端側に向けて伸ばされて、基端側に隣り合う溝の傾斜面を摺動する。そして、傾斜面を摺動する際の摩擦によって、導体部を構成する各素線の表面の酸化被膜が破壊され、各素線に新生面が露出する。これにより、導体部の圧縮率を過度に高めることなく、各素線の酸化被膜を十分に破壊して新生面を露出させることができる。そして、バレルの接触面にはアルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されており、各素線に露出した新生面と被膜との間で凝着が生じ、良好な接触抵抗および圧着強度を得ることができる。   According to the crimp terminal for an aluminum electric wire having the configuration of (2) above, the conductor portion compressed by compression of the barrel is bitten into each groove, and mainly toward the base end side with the portion bitten into each groove as a base point. It is extended and slides on the inclined surface of the groove adjacent to the base end side. And the oxide film of the surface of each strand which comprises a conductor part is destroyed by the friction at the time of sliding an inclined surface, and a new surface is exposed to each strand. Thereby, the new surface can be exposed by sufficiently destroying the oxide film of each strand without excessively increasing the compressibility of the conductor portion. And the coating which has an adhesion action with respect to aluminum and aluminum alloy is formed in the contact surface of a barrel, adhesion arises between the new surface exposed to each strand, and a coating, good contact resistance and Crimp strength can be obtained.

上記（３）の構成のアルミ電線用圧着端子によれば、撚り合わされた各素線が均等に溝に食い込み、また均等に溝の傾斜面を摺動する。それにより、一層良好な接触抵抗および圧着強度を得ることができる。   According to the crimp terminal for an aluminum electric wire having the configuration (3), the twisted strands uniformly bite into the groove, and slide on the inclined surface of the groove evenly. Thereby, better contact resistance and pressure bonding strength can be obtained.

本発明のアルミ電線用圧着端子によれば、アルミ電線の導体部と端子のバレルとの接触抵抗の低減および圧着強度の確保を両立させることができる。   According to the crimp terminal for an aluminum wire of the present invention, it is possible to reduce both the contact resistance between the conductor portion of the aluminum cable and the barrel of the terminal and to secure the crimp strength.

以下、本発明のアルミ電線用圧着端子の好適な実施形態を図面に基づいて詳細に説明する。   Hereinafter, a preferred embodiment of a crimp terminal for an aluminum electric wire according to the present invention will be described in detail with reference to the drawings.

（第１実施形態）
図１は本発明のアルミ電線用圧着端子の第１実施形態の斜視図、図２はアルミ電線に圧着された状態で示す図１の圧着端子の断面図である。 (First embodiment)
FIG. 1 is a perspective view of a first embodiment of a crimp terminal for an aluminum electric wire according to the present invention, and FIG. 2 is a cross-sectional view of the crimp terminal of FIG.

図１に示すように、アルミ電線１は、アルミニウム製またはアルミニウム合金製の複数の素線３が撚り合わされた導体部２を有している。導体部２の外周は、絶縁材料で形成されたシース４で被覆されている。アルミ電線１は、その端末部において、所定の長さでシース４が除去されて導体部２が露出されている。アルミ電線１に圧着される端子１０は、この端末部に圧着される。尚、アルミニウム合金としては、アルミニウムと鉄との合金を例示することができる。アルミニウムと鉄との合金は、アルミニウム単体に比べて、強度（特に引っ張り強度）に優れ、好ましい。   As shown in FIG. 1, the aluminum electric wire 1 has a conductor portion 2 in which a plurality of strands 3 made of aluminum or aluminum alloy are twisted together. The outer periphery of the conductor portion 2 is covered with a sheath 4 formed of an insulating material. In the end portion of the aluminum electric wire 1, the sheath 4 is removed with a predetermined length, and the conductor portion 2 is exposed. The terminal 10 to be crimped to the aluminum electric wire 1 is crimped to this terminal portion. In addition, as an aluminum alloy, the alloy of aluminum and iron can be illustrated. An alloy of aluminum and iron is preferable because it is superior in strength (particularly tensile strength) as compared with aluminum alone.

端子１０は、その先端側に相手側端子（図示せず）との接続部１１が設けられ、その基端側にアルミ電線１に加締め付けられるバレル１２が設けられている。バレル１２には、その先端側にアルミ電線１の導体部２に加締め付けられるワイヤーバレル１３と、その基端側にアルミ電線１のシース４に加締め付けられるインシュレーションバレル１４とが設けられている。   The terminal 10 is provided with a connecting portion 11 with a mating terminal (not shown) on the distal end side, and a barrel 12 that is crimped to the aluminum electric wire 1 on the proximal end side. The barrel 12 is provided with a wire barrel 13 that is crimped to the conductor portion 2 of the aluminum electric wire 1 at its distal end side and an insulation barrel 14 that is crimped to the sheath 4 of the aluminum electric wire 1 at its proximal end side. .

ワイヤーバレル１３は、アルミ電線１の端末部に露出された導体部２が載置される底板部２０と、底板部２０上に載置された導体部２を両側から挟むように底板部２０に連設された一対の加締片２１とを備えており、断面略Ｕ字状に成形されている。ワイヤーバレル１３は、その内側に端末部の導体部２を抱え込み、この導体部２に加締め付けられる。   The wire barrel 13 is formed on the bottom plate portion 20 so as to sandwich the bottom plate portion 20 on which the conductor portion 2 exposed at the terminal portion of the aluminum electric wire 1 is placed and the conductor portion 2 placed on the bottom plate portion 20 from both sides. It has a pair of caulking pieces 21 provided in series, and is formed in a substantially U-shaped cross section. The wire barrel 13 holds the conductor portion 2 of the terminal portion inside thereof, and is crimped to the conductor portion 2.

インシュレーションバレル１４は、アルミ電線１の端末部に残るシース４が載置される底板部２２と、底板部２２に載置されたシース４を両側から挟むように底板部２２に連設された一対の加締片２３とを備えており、ワイヤーバレル１３と同様に断面略Ｕ字状に成形されている。インシュレーションバレル１４は、その内側に端末部のシース４を抱え込み、このシース４に加締め付けられる。尚、インシュレーションバレル１４の底板部２２は、ワイヤーバレル１３の底板部２０に連設されている。   The insulation barrel 14 is connected to the bottom plate portion 22 so as to sandwich the sheath 4 placed on the bottom plate portion 22 from both sides, and the bottom plate portion 22 on which the sheath 4 remaining at the terminal portion of the aluminum electric wire 1 is placed. A pair of caulking pieces 23 are provided, and the wire barrel 13 is formed in a substantially U-shaped cross section. The insulation barrel 14 holds the sheath 4 at the end portion inside, and is crimped to the sheath 4. The bottom plate portion 22 of the insulation barrel 14 is connected to the bottom plate portion 20 of the wire barrel 13.

そして、端子１０は、端末部の導体部２を抱え込んだワイヤーバレル１３がこの導体部２に加締め付けられ、また、端末部のシース４を抱え込んだインシュレーションバレル１４がこのシース４に加締め付けられて、アルミ電線１に圧着される。   In the terminal 10, the wire barrel 13 holding the terminal conductor portion 2 is crimped to the conductor portion 2, and the insulation barrel 14 holding the terminal sheath 4 is crimped to the sheath 4. And crimped to the aluminum electric wire 1.

ワイヤーバレル１３の内表面、即ち、導体部２と接触するワイヤーバレル１３の接触面には、ワイヤーバレル１３が加締め付けられる導体部２の圧着部分の軸方向と交差する方向に並列に延びる複数の溝２４が形成されている。   The inner surface of the wire barrel 13, that is, the contact surface of the wire barrel 13 in contact with the conductor portion 2, has a plurality of parallel extensions extending in a direction intersecting the axial direction of the crimped portion of the conductor portion 2 to which the wire barrel 13 is crimped. A groove 24 is formed.

さらに、複数の溝２４は、導体部２の圧着部分の外周面に表れる各素線３と交差する方向に並列に延びている。換言すれば、導体部２の圧着部分の外周面に表れる各素線３は導体部２の圧着部分の軸を中心とした螺旋となっており、複数の溝２４は、導体部２の圧着部分の軸を中心として、これらの素線３とは逆回りで螺旋状に並列に延びている。好ましくは、各溝２４は、導体部２の圧着部分の外周面に表れる各素線３と垂直に交差する方向に延びている。   Further, the plurality of grooves 24 extend in parallel in a direction intersecting with each strand 3 appearing on the outer peripheral surface of the crimped portion of the conductor portion 2. In other words, each wire 3 appearing on the outer peripheral surface of the crimping portion of the conductor portion 2 has a spiral centering on the axis of the crimping portion of the conductor portion 2, and the plurality of grooves 24 are formed on the crimping portion of the conductor portion 2. These strands 3 are spirally arranged in parallel in the reverse direction around the axis. Preferably, each groove 24 extends in a direction perpendicular to each strand 3 appearing on the outer peripheral surface of the crimped portion of the conductor portion 2.

そして、導体部２の圧着部分の先端側に向く各溝２４の内側面２４ａは、先端側に向けて下り勾配となる傾斜面となっている。他方、基端側に向く各溝２４の内側面は、垂直面となっている。   And the inner side surface 24a of each groove | channel 24 which faces the front end side of the crimping | compression-bonding part of the conductor part 2 is an inclined surface which becomes a downward slope toward the front end side. On the other hand, the inner surface of each groove 24 facing the base end is a vertical surface.

さらに、少なくともワイヤーバレル１３の接触面には、アルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されている。このような被膜は、例えばアルミニウムやアルミニウム合金よりも軟質の金属からなる被膜であり、好ましくは錫めっき被膜である。また、被膜の厚さは、好ましくは１．５μｍ以上４．０μｍ以下である。   Further, at least the contact surface of the wire barrel 13 is formed with a coating having an adhesion action on aluminum and aluminum alloy. Such a coating is, for example, a coating made of a metal softer than aluminum or an aluminum alloy, and is preferably a tin plating coating. The thickness of the coating is preferably 1.5 μm or more and 4.0 μm or less.

以上の構成を備えた端子１０は、例えば表面に錫めっきが施された銅合金等の導電性材料からなる一枚の板材を所定の形状に打ち抜き、これを折り曲げ加工して形成される。   The terminal 10 having the above configuration is formed, for example, by punching a single plate material made of a conductive material such as a copper alloy whose surface is tin-plated into a predetermined shape and bending it.

図２に示すように、ワイヤーバレル１３が導体部２に加締め付けられることにより、導体部２は圧縮され、導体部２を構成する各素線３はワイヤーバレル１３の接触面に設けられた各溝２４に食い込む。そして、各素線３は、各溝２４に食い込んだ部位を基点として、主として先端側に向けて伸ばされる。   As shown in FIG. 2, when the wire barrel 13 is crimped to the conductor portion 2, the conductor portion 2 is compressed, and each strand 3 constituting the conductor portion 2 is provided on the contact surface of the wire barrel 13. Bit into the groove 24. And each strand 3 is extended mainly toward the front end side, using the site | part biting into each groove | channel 24 as a base point.

隣り合う一組の溝２４の間において、先端側に向けて伸ばされた各素線３の部位は、先端側の溝２４内に進入し、その際、先端側の溝２４の傾斜面２４ａを摺動する。そして、傾斜面２４ａを摺動する各素線３の部位は、傾斜面２４ａとの間の摩擦によって表面の酸化被膜が破壊され、その部位に新生面、即ち、アルミニウムまたはアルミニウム合金の素地が露出する。   Between the pair of adjacent grooves 24, the portion of each strand 3 extended toward the tip side enters the groove 24 on the tip side, and at this time, the inclined surface 24a of the groove 24 on the tip side is moved. Slide. And the site | part of each strand 3 which slides on the inclined surface 24a destroys the surface oxide film by friction with the inclined surface 24a, and a new surface, ie, the base material of aluminum or aluminum alloy, is exposed to the site | part. .

そして、ワイヤーバレル１３の接触面に形成された被膜と各素線３に露出した新生面との間には面圧下での摩擦が生じ、両者の間で凝着が生じる。凝着により、ワイヤーバレル１３の被膜と各素線３の新生面とが原子レベルで結合する。そして、複数の溝２４が、導体部２の圧着部分の外周面に表れる各素線３と交差する方向に並列に延びていることにより、各素線３が均等に溝２４に食い込み、また均等に溝２４の傾斜面２４ａを摺動する。それにより、酸化被膜の破壊および被膜との凝着が、各素線３に均一に生じる。それにより、良好な接触抵抗および結合強度が得られる。   And the friction under surface pressure arises between the film formed in the contact surface of the wire barrel 13, and the new surface exposed to each strand 3, and adhesion arises between both. By the adhesion, the coating of the wire barrel 13 and the new surface of each strand 3 are bonded at the atomic level. The plurality of grooves 24 extend in parallel in a direction intersecting with the respective strands 3 appearing on the outer peripheral surface of the crimp portion of the conductor portion 2, so that the respective strands 3 bite into the grooves 24 evenly. Then, the inclined surface 24a of the groove 24 is slid. Thereby, the destruction of the oxide film and the adhesion with the film occur uniformly in each strand 3. Thereby, good contact resistance and bond strength are obtained.

このように、本実施形態のアルミ電線用圧着端子１０によれば、ワイヤーバレル１３が加締め付けられて圧縮された導体部２は、各溝２４に食い込み、各溝２４に食い込んだ部位を基点に主として先端側に向けて伸ばされて、先端側に隣り合う溝２４の傾斜面２４ａを摺動する。そして、傾斜面２４ａを摺動する際の摩擦によって、導体部２を構成する各素線３の表面の酸化被膜が破壊され、各素線３に新生面が露出する。これにより、導体部２の圧縮率を過度に高めることなく、各素線３の酸化被膜を十分に破壊して新生面を露出させることができる。そして、バレルの接触面にはアルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されており、各素線に露出した新生面と被膜との間で凝着が生じ、良好な接触抵抗および圧着強度を得ることができる。   As described above, according to the crimp terminal 10 for an aluminum electric wire of the present embodiment, the conductor portion 2 compressed by the crimping of the wire barrel 13 bites into each groove 24, and uses the portion bitten into each groove 24 as a base point. It is extended mainly toward the tip end side and slides on the inclined surface 24a of the groove 24 adjacent to the tip end side. The oxide film on the surface of each wire 3 constituting the conductor portion 2 is broken by friction when sliding on the inclined surface 24 a, and a new surface is exposed on each wire 3. Thereby, the oxide film of each strand 3 can be fully destroyed and the new surface can be exposed without excessively increasing the compressibility of the conductor portion 2. And the coating which has an adhesion action with respect to aluminum and aluminum alloy is formed in the contact surface of a barrel, adhesion arises between the new surface exposed to each strand, and a coating, good contact resistance and Crimp strength can be obtained.

（第２実施形態）
図３は本発明のアルミ電線用圧着端子の第２実施形態の斜視図、図４はアルミ電線に圧着された状態で示す図３の圧着端子の断面図である。尚、上述した第１実施形態の端子１０と共通する要素については、図中同一符号を付することにより説明を省略あるいは簡略する。 (Second Embodiment)
FIG. 3 is a perspective view of a second embodiment of the crimp terminal for an aluminum electric wire according to the present invention, and FIG. 4 is a cross-sectional view of the crimp terminal of FIG. In addition, about the element which is common in the terminal 10 of 1st Embodiment mentioned above, description is abbreviate | omitted or simplified by attaching | subjecting the same code | symbol in a figure.

図３に示すように、端子１１０のワイヤーバレル１３の接触面には、ワイヤーバレル１３が加締め付けられる導体部２の圧着部分の軸方向と交差する方向に並列に延びる複数の溝２４´が形成されている。これら複数の溝２４´は、導体部２の圧着部分の外周面に表れる各素線３と交差する方向に並列に延びている。そして、導体部２の圧着部分の基端側に向く各溝２４´の内側面２４ｂは、基端側に向けて下り勾配となる傾斜面となっている。他方、先端側に向く各溝２４´の内側面は、垂直面となっている。   As shown in FIG. 3, a plurality of grooves 24 ′ extending in parallel in the direction intersecting the axial direction of the crimping portion of the conductor portion 2 to which the wire barrel 13 is crimped are formed on the contact surface of the wire barrel 13 of the terminal 110. Has been. The plurality of grooves 24 ′ extend in parallel in a direction intersecting with each strand 3 appearing on the outer peripheral surface of the crimped portion of the conductor portion 2. And the inner side surface 24b of each groove | channel 24 'which faces the base end side of the crimping | compression-bonding part of the conductor part 2 is an inclined surface which becomes a downward slope toward the base end side. On the other hand, the inner surface of each groove 24 'facing the tip side is a vertical surface.

さらに、少なくともワイヤーバレル１３の接触面には、アルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されている。   Further, at least the contact surface of the wire barrel 13 is formed with a coating having an adhesion action on aluminum and aluminum alloy.

図４に示すように、ワイヤーバレル１３が導体部２に加締め付けられることにより、導体部２は圧縮され、導体部２を構成する各素線３はワイヤーバレル１３の接触面に設けられた各溝２４´に食い込む。そして、各素線３は、各溝２４´に食い込んだ部位を基点として、主として基端側に向けて伸ばされる。   As shown in FIG. 4, when the wire barrel 13 is crimped to the conductor portion 2, the conductor portion 2 is compressed, and each strand 3 constituting the conductor portion 2 is provided on the contact surface of the wire barrel 13. Cut into the groove 24 '. And each strand 3 is mainly extended toward the base end side, using the site | part biting into each groove | channel 24 'as a base point.

隣り合う一組の溝２４´の間において、基端側に向けて伸ばされた各素線３の部位は、基端側の溝２４´内に進入し、その際、基端側の溝２４´の傾斜面２４ｂを摺動する。そして、傾斜面２４ｂを摺動する各素線３の部位は、傾斜面２４ｂとの間の摩擦によって表面の酸化被膜が破壊され、その部位に新生面、即ち、アルミニウムまたはアルミニウム合金の素地が露出する。   Between a pair of adjacent grooves 24 ′, the portion of each strand 3 extended toward the base end side enters the base end side groove 24 ′, and at that time, the base end side groove 24 ′. It slides on the inclined surface 24b. And the site | part of each strand 3 which slides on the inclined surface 24b destroys the surface oxide film by friction with the inclined surface 24b, and the new surface, ie, the base of aluminum or aluminum alloy, is exposed to the site | part. .

そして、ワイヤーバレル１３の接触面に形成された被膜と各素線３に露出した新生面との間には面圧下での摩擦が生じ、両者の間で凝着が生じる。凝着により、ワイヤーバレル１３の被膜と各素線３の新生面とが原子レベルで結合する。そして、複数の溝２４が、導体部２の圧着部分の外周面に表れる各素線３と交差する方向に並列に延びていることにより、各素線３が均等に溝２４´に食い込み、また均等に溝２４´の傾斜面２４ａを摺動する。それにより、酸化被膜の破壊および被膜との凝着が、各素線３に均一に生じる。それにより、良好な接触抵抗および結合強度が得られる。   And the friction under surface pressure arises between the film formed in the contact surface of the wire barrel 13, and the new surface exposed to each strand 3, and adhesion arises between both. By the adhesion, the coating of the wire barrel 13 and the new surface of each strand 3 are bonded at the atomic level. And since the some groove | channel 24 is extended in parallel in the direction which cross | intersects each strand 3 which appears on the outer peripheral surface of the crimping | compression-bonding part of the conductor part 2, each strand 3 bites into groove | channel 24 'equally, The inclined surface 24a of the groove 24 'is slid evenly. Thereby, the destruction of the oxide film and the adhesion with the film occur uniformly in each strand 3. Thereby, good contact resistance and bond strength are obtained.

このように、本実施形態のアルミ電線用圧着端子１０によれば、ワイヤーバレル１３が加締め付けられて圧縮された導体部２は、各溝２４´に食い込み、各溝２４´に食い込んだ部位を基点に主として先端側に向けて伸ばされて、基端側に隣り合う溝２４´の傾斜面２４ｂを摺動する。そして、傾斜面２４ｂを摺動する際の摩擦によって、導体部２を構成する各素線３の表面の酸化被膜が破壊され、各素線３に新生面が露出する。これにより、導体部２の圧縮率を過度に高めることなく、各素線３の酸化被膜を十分に破壊して新生面を露出させることができる。そして、バレルの接触面にはアルミニウムおよびアルミニウム合金に対して凝着作用を有する被膜が形成されており、各素線に露出した新生面と被膜との間で凝着が生じ、良好な接触抵抗および圧着強度を得ることができる。   Thus, according to the crimp terminal 10 for an aluminum electric wire of the present embodiment, the conductor portion 2 compressed by the crimping of the wire barrel 13 bites into each groove 24 ′, and the part bitten into each groove 24 ′ The base point is extended mainly toward the distal end side, and slides on the inclined surface 24b of the groove 24 'adjacent to the proximal end side. The oxide film on the surface of each wire 3 constituting the conductor portion 2 is destroyed by friction when sliding on the inclined surface 24 b, and a new surface is exposed on each wire 3. Thereby, the oxide film of each strand 3 can be fully destroyed and the new surface can be exposed without excessively increasing the compressibility of the conductor portion 2. And the coating which has an adhesion action with respect to aluminum and aluminum alloy is formed in the contact surface of a barrel, adhesion arises between the new surface exposed to each strand, and a coating, good contact resistance and Crimp strength can be obtained.

尚、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の形状、寸法、数値、形態、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the shape, size, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

本発明のアルミ電線用圧着端子の第１実施形態の斜視図である。It is a perspective view of 1st Embodiment of the crimp terminal for aluminum electric wires of this invention. アルミ電線に圧着された状態で示す図１の圧着端子の断面図である。It is sectional drawing of the crimp terminal of FIG. 1 shown in the state crimped | bonded to the aluminum electric wire. 本発明のアルミ電線用圧着端子の第２実施形態の斜視図である。It is a perspective view of 2nd Embodiment of the crimp terminal for aluminum electric wires of this invention. アルミ電線に圧着された状態で示す図３の圧着端子の断面図である。It is sectional drawing of the crimp terminal of FIG. 3 shown in the state crimped | bonded to the aluminum electric wire.

符号の説明Explanation of symbols

１ アルミ電線
２ 導体部
３ 素線
１０、１１０ 端子
１３ ワイヤーバレル（バレル）
２０ 底板部
２１ 加締片
２４ 溝
２４ａ、２４ｂ 傾斜面 DESCRIPTION OF SYMBOLS 1 Aluminum electric wire 2 Conductor part 3 Elementary wire 10, 110 Terminal 13 Wire barrel (barrel)
20 Bottom plate 21 Clamping piece 24 Groove 24a, 24b Inclined surface

Claims (4)

アルミニウム製またはアルミニウム合金製の複数の素線が撚り合わされた導体部を有するアルミ電線に圧着されるアルミ電線用圧着端子であって、
前記導体部を抱え込んで該導体部に加締め付けられるバレルを備え、
前記導体部と接触する前記バレルの接触面に、アルミニウムおよび前記アルミニウム合金に対して凝着作用を有する被膜が形成されており且つ、前記バレルが加締め付けられる前記導体部の圧着部分の軸方向と交差する方向に並列に延びる複数の溝が形成されており、
前記導体部の前記圧着部分の先端側に向く前記各溝の内側面が、先端側に向けて下り勾配となる傾斜面となっていることを特徴とするアルミ電線用圧着端子。 A crimp terminal for an aluminum wire that is crimped to an aluminum wire having a conductor portion in which a plurality of strands made of aluminum or an aluminum alloy are twisted together,
A barrel that holds the conductor portion and is crimped to the conductor portion,
On the contact surface of the barrel that comes into contact with the conductor portion, a coating having an adhesion action on aluminum and the aluminum alloy is formed, and the axial direction of the crimp portion of the conductor portion to which the barrel is crimped A plurality of grooves extending in parallel in the intersecting direction are formed,
The crimp terminal for an aluminum electric wire, wherein an inner surface of each groove facing the distal end side of the crimp portion of the conductor portion is an inclined surface having a downward slope toward the distal end side. アルミニウム製またはアルミニウム合金製の複数の素線が撚り合わされた導体部を有するアルミ電線に圧着されるアルミ電線用圧着端子であって、
前記導体部を抱え込んで該導体部に加締め付けられるバレルを備え、
前記導体部と接触する前記バレルの接触面に、アルミニウムおよび前記アルミニウム合金に対して凝着作用を有する被膜が形成されており且つ、前記バレルが加締め付けられる前記導体部の圧着部分の軸方向と交差する方向に並列に延びる複数の溝が形成されており、
前記導体部の前記圧着部分の基端側に向く前記各溝の内側面が、基端側に向けて下り勾配となる傾斜面となっていることを特徴とするアルミ電線用圧着端子。 A crimp terminal for an aluminum wire that is crimped to an aluminum wire having a conductor portion in which a plurality of strands made of aluminum or an aluminum alloy are twisted together,
A barrel that holds the conductor portion and is crimped to the conductor portion,
On the contact surface of the barrel that comes into contact with the conductor portion, a coating having an adhesion action on aluminum and the aluminum alloy is formed, and the axial direction of the crimp portion of the conductor portion to which the barrel is crimped A plurality of grooves extending in parallel in the intersecting direction are formed,
The crimp terminal for an aluminum electric wire, wherein an inner surface of each groove facing the proximal end side of the crimp portion of the conductor portion is an inclined surface that is inclined downward toward the proximal end side. 前記複数の溝が、前記導体部の前記圧着部分の外周面に表れる各素線と交差する方向に並列に延びていることを特徴とする請求項１または請求項２に記載のアルミ電線用圧着端子。   3. The crimping for an aluminum electric wire according to claim 1, wherein the plurality of grooves extend in parallel in a direction intersecting with each strand appearing on an outer peripheral surface of the crimping portion of the conductor portion. Terminal. 前記バレルの接触面に形成された前記被膜が錫めっき被膜であることを特徴とする請求項１〜３のいずれか一項に記載のアルミ電線用圧着端子。   The crimped terminal for an aluminum electric wire according to any one of claims 1 to 3, wherein the coating formed on the contact surface of the barrel is a tin plating coating.
JP2008016604A 2008-01-28 2008-01-28 Crimp terminal for aluminum wire Expired - Fee Related JP5119532B2 (en)

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US9455504B2 (en) 2014-11-07 2016-09-27 Hyundai Motor Company Wire terminal connector with improved clamping force

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US9455504B2 (en) 2014-11-07 2016-09-27 Hyundai Motor Company Wire terminal connector with improved clamping force

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