JP2009087848A - Crimp terminal for aluminum wire and method of crimping terminal of aluminum wire - Google Patents

Crimp terminal for aluminum wire and method of crimping terminal of aluminum wire Download PDF

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JP2009087848A
JP2009087848A JP2007258542A JP2007258542A JP2009087848A JP 2009087848 A JP2009087848 A JP 2009087848A JP 2007258542 A JP2007258542 A JP 2007258542A JP 2007258542 A JP2007258542 A JP 2007258542A JP 2009087848 A JP2009087848 A JP 2009087848A
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terminal
barrel
conductor
electric wire
wire
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Nobuaki Sakai
信昭 酒井
Hiroyuki Toyoda
浩之 豊田
Katsunori Ogata
勝則 岳田
Yukihiro Kawamura
幸大 川村
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp terminal for an aluminum wire and a method of crimping a terminal of an aluminum wire which reduce a shearing force acting on a conductor portion of the aluminum wire to prevent the breakage of the core of the conductor portion, thus ensure the electrical connection reliability of the aluminum wire. <P>SOLUTION: The crimp terminal 50 for the aluminum wire includes an inter-terminal connection portion 51, and a wire connection portion 52 which is formed to be continuous to the inter-terminal connection portion 51 and has a barrel 56 to be crimped to the conductor portion 54 of the aluminum wire 53. The barrel 56 of the wire connection portion 52 has a first end 71 located closer to the inter-terminal connection portion 51, and a second end 72 located opposite to the first end 71. The second end 72 has a relief portion 80 that is widened gradually to expand a holding area for the conductor portion 54. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、アルミニウム電線用の圧着端子およびアルミニウム電線の端子圧着方法に関し、特にアルミニウム電線の導体部に圧着されるアルミニウム電線用の圧着端子およびアルミニウム電線の端子圧着方法に関する。   The present invention relates to a crimp terminal for an aluminum wire and a terminal crimp method for the aluminum wire, and more particularly to a crimp terminal for an aluminum wire and a terminal crimp method for the aluminum wire that are crimped to a conductor portion of the aluminum wire.

例えば自動車に配索されるワイヤーハーネスとしては、一般的に銅電線が使用される。しかし、近年、車両の軽量化の要求やリサイクル性の改善要求があることから、銅電線に代えてアルミニウム電線を使用する要望が高まっている。   For example, a copper wire is generally used as a wire harness routed in an automobile. However, in recent years, there are demands for using aluminum wires instead of copper wires because there is a demand for reducing the weight of vehicles and a request for improving recyclability.

ワイヤーハーネス同士の電気的な接続や、車載用機器とワイヤーハーネスとの電気的な接続を行う場合には、電気コネクタが用いられる。この種の電気コネクタは、互いに嵌め合わされる複数のコネクタハウジングと、これらのコネクタハウジング内に挿入して嵌め合わされる複数の圧着端子から構成されている。   An electrical connector is used for electrical connection between wire harnesses or for electrical connection between a vehicle-mounted device and a wire harness. This type of electrical connector includes a plurality of connector housings that are fitted together and a plurality of crimp terminals that are inserted into the connector housings and fitted together.

圧着端子は、ワイヤーハーネスのアルミニウム電線に対して圧着されて電気的にかつ機械的に接続して固定される。アルミニウム電線の導体部に対して、電気的導通を確保するために、圧着端子のバレルは端子圧着工具により押圧されることで、このバレルは高圧縮でアルミニウム電線の導体部に対して屈曲される。これにより、アルミニウム電線の導体部の金属酸化膜が破壊されるので、圧着端子と導体部との電気的導通を確保する（例えば、特許文献１参照）。
特開２００５―０５０７３６号公報 A crimp terminal is crimped | bonded with respect to the aluminum electric wire of a wire harness, and is electrically and mechanically connected and fixed. In order to ensure electrical continuity with respect to the conductor portion of the aluminum electric wire, the barrel of the crimp terminal is pressed against the conductor portion of the aluminum electric wire with high compression by being pressed by a terminal crimping tool. . Thereby, since the metal oxide film of the conductor part of an aluminum electric wire is destroyed, the electrical continuity with a crimp terminal and a conductor part is ensured (for example, refer patent document 1).
Japanese Patent Laid-Open No. 2005-050736

しかし、バレルがアルミニウム電線の導体部に高圧縮で圧着されることにより、このバレルの圧着部では、アルミニウム電線の導体部に対して大きな剪断力がかかる。
図８は、端子圧着工具の形状例と圧着端子およびアルミニウム電線を示している。
図８（Ａ）に示すように、圧着端子１００は、端子間接続部１０１と、電線接続部１０２を有している。電線接続部１０２は、アルミニウム電線１５０の導体部１５１を圧着して電気的な接続を確保するためのバレル１０３を有する。 However, since the barrel is crimped to the conductor portion of the aluminum electric wire with high compression, a large shearing force is applied to the conductor portion of the aluminum electric wire at the crimping portion of the barrel.
FIG. 8 shows a shape example of a terminal crimping tool, a crimp terminal, and an aluminum electric wire.
As illustrated in FIG. 8A, the crimp terminal 100 includes an inter-terminal connection portion 101 and an electric wire connection portion 102. The electric wire connecting portion 102 has a barrel 103 for securing the electrical connection by crimping the conductor portion 151 of the aluminum electric wire 150.

端子圧着工具１４０は、このバレル１０３を導体部１５１に対して圧着するために、刃先１５５と、２つの面取り部１６０，１６１を有する。一方の面取り部１６０は、端子間接続部１０１側に形成され、他方の面取り部１６１は、アルミニウム電線１５０側に形成されている。面取り部１６０，１６１の面取り角度は、４５度で同じであり、同じ大きさである。   The terminal crimping tool 140 has a cutting edge 155 and two chamfered portions 160 and 161 for crimping the barrel 103 to the conductor portion 151. One chamfered portion 160 is formed on the inter-terminal connecting portion 101 side, and the other chamfered portion 161 is formed on the aluminum electric wire 150 side. The chamfer angles of the chamfered portions 160 and 161 are the same at 45 degrees and have the same size.

図８（Ａ）と図８（Ｂ）に示すように、この端子圧着工具１４０がバレル１０３を高圧縮で押圧すると、バレル１０３は端子圧着工具１４０の刃先１５５と面取り部１６０，１６１の形状に合わせて屈曲されて、バレル１０３には屈曲部１７１が形成される。   As shown in FIGS. 8A and 8B, when the terminal crimping tool 140 presses the barrel 103 with high compression, the barrel 103 has the shape of the cutting edge 155 of the terminal crimping tool 140 and the chamfered portions 160 and 161. A bent portion 171 is formed in the barrel 103 by being bent together.

図８（Ｃ）は、バレル１０３の屈曲部１７１と導体部１５１を拡大して示しており、この屈曲部１７１では、端子圧着工具１４０による屈曲量が少ないので、図８（Ｃ）における導体部１５１の部分１７５で示すように、屈曲部１７１付近では、導体部１５１には大きな剪断力がかかるので、急激な段差変化が生じて急激に立ち上がった形状になる。このことから、導体部１５１の芯線切れが発生するおそれがある。従って、アルミニウム電線の導体部に対して圧着端子を確実に電気的に接続することができないことがあり、電気的な接続信頼性が確保できないことがある。   FIG. 8C shows an enlarged view of the bent portion 171 and the conductor portion 151 of the barrel 103. Since the bent portion 171 has a small amount of bending by the terminal crimping tool 140, the conductor portion in FIG. As indicated by a portion 175 of 151, in the vicinity of the bent portion 171, since a large shearing force is applied to the conductor portion 151, a sudden step change occurs and the shape suddenly rises. For this reason, there is a possibility that the core wire of the conductor portion 151 may be broken. Therefore, there are cases where the crimp terminal cannot be reliably electrically connected to the conductor portion of the aluminum electric wire, and the electrical connection reliability may not be ensured.

そこで、本発明は上記課題を解消するために、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できるアルミニウム電線用の圧着端子およびアルミニウム電線の端子圧着方法を提供することを目的とする。   Then, in order to eliminate the said subject, this invention is for aluminum electric wires which can ensure the electrical connection reliability of an aluminum electric wire by reducing the shearing force with respect to the electric conductor part of an aluminum electric wire, and preventing the core wire of a conductor part from cut | disconnecting. An object of the present invention is to provide a crimping terminal and a terminal crimping method for an aluminum electric wire.

上記課題を解消するために、本発明のアルミニウム電線用の圧着端子は、端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備えるアルミニウム電線用の圧着端子であって、
前記電線接続部の前記バレルは、前記端子間接続部側に位置される第１端部と、前記第１端部とは反対側に位置される第２端部を有し、
前記第２端部には、前記導体部を案内するために徐々に広げた逃げ部が形成されていることを特徴とする。
これにより、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。 In order to solve the above problems, a crimp terminal for an aluminum wire according to the present invention is a crimp terminal for an aluminum wire including an inter-terminal connection portion and a wire connection portion having a barrel crimped to a conductor portion of the aluminum wire. There,
The barrel of the wire connecting portion has a first end located on the inter-terminal connecting portion side and a second end located on the opposite side of the first end,
The second end portion is formed with a relief portion that gradually widens to guide the conductor portion.
Thereby, the electrical connection reliability of an aluminum electric wire is securable by reducing the shear force with respect to the conductor part of an aluminum electric wire, and preventing the core wire of a conductor part from cut | disconnecting.

本発明のアルミニウム電線の端子圧着方法では、端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備える圧着端子の前記バレルを、端子圧着工具により前記導体部に圧着する際に、
前記端子圧着工具の前記端子間接続部側の第１面取り部に比べて、前記第１面取り部の反対側に形成された前記端子圧着工具の第２面取り部が大きく、
前記電線接続部の前記バレルは、前記端子間接続部側に位置される第１端部と、前記第１端部とは反対側に位置される第２端部を有し、
前記端子圧着工具により前記バレルを前記導体部に対して圧着することで、前記バレルの前記第２端部には、前記導体部の保持領域を拡げるための逃げ部が、徐々に広げて形成される。
これにより、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。 In the terminal crimping method for an aluminum electric wire of the present invention, the barrel of the crimp terminal including the inter-terminal connection portion and the electric wire connection portion having a barrel crimped to the conductor portion of the aluminum electric wire is applied to the conductor portion by a terminal crimping tool. When crimping
The second chamfered portion of the terminal crimping tool formed on the opposite side of the first chamfered portion is larger than the first chamfered portion on the interterminal connection portion side of the terminal crimping tool,
The barrel of the wire connecting portion has a first end located on the inter-terminal connecting portion side and a second end located on the opposite side of the first end,
By crimping the barrel to the conductor portion with the terminal crimping tool, a relief portion for expanding the holding region of the conductor portion is gradually widened at the second end portion of the barrel. The
Thereby, the electrical connection reliability of an aluminum electric wire is securable by reducing the shear force with respect to the conductor part of an aluminum electric wire, and preventing the core wire of a conductor part from cut | disconnecting.

また、本発明のアルミニウム電線の端子圧着方法では、端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備える圧着端子の前記バレルを、端子圧着工具により前記導体部に圧着する際に、
前記端子圧着工具の前記端子間接続部側の第１面取り部と、前記第１面取り部の反対側に形成された前記端子圧着工具の第２面取り部とは同じ大きさであり、
前記第２面取り部に対応する前記バレルの部分には、前記導体部の保持領域を拡げるために徐々に広がった逃げ部が、あらかじめ形成されており、
前記端子圧着工具により前記バレルを前記導体部に対して圧着することを特徴とする。
これにより、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。 Moreover, in the terminal crimping method of the aluminum electric wire of the present invention, the conductor of the crimp terminal including the inter-terminal connecting portion and the electric wire connecting portion having a barrel crimped to the conductor portion of the aluminum electric wire is connected to the conductor by a terminal crimping tool. When crimping to the part
The first chamfered portion on the terminal connecting portion side of the terminal crimping tool and the second chamfered portion of the terminal crimping tool formed on the opposite side of the first chamfered portion are the same size.
In the part of the barrel corresponding to the second chamfered portion, a relief portion that gradually widens to expand the holding region of the conductor portion is formed in advance,
The barrel is crimped to the conductor portion by the terminal crimping tool.
Thereby, the electrical connection reliability of an aluminum electric wire is securable by reducing the shearing force with respect to the conductor part of an aluminum electric wire, and preventing the core wire of a conductor part from cut | disconnecting.

本発明のアルミニウム電線用の圧着端子によれば、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。   According to the crimp terminal for an aluminum electric wire of the present invention, the electrical connection reliability of the aluminum electric wire can be ensured by reducing the shearing force on the conductor portion of the aluminum electric wire and preventing the conductor portion from being disconnected.

本発明のアルミニウム電線の端子圧着方法によれば、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。   According to the terminal crimping method for an aluminum electric wire of the present invention, the electrical connection reliability of the aluminum electric wire can be ensured by reducing the shearing force on the conductor portion of the aluminum electric wire and preventing the conductor portion from being cut off.

以下、図面を参照して、本発明の好ましい実施形態を詳細に説明する。
＜第１実施形態＞
図１は、本発明のアルミニウム電線用の圧着端子を、アルミニウム電線の導体部に対して、圧着するための端子圧着工具の好ましい実施形態を示す斜視図である。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
FIG. 1 is a perspective view showing a preferred embodiment of a terminal crimping tool for crimping a crimp terminal for an aluminum wire of the present invention against a conductor portion of the aluminum wire.

図１に示す端子圧着工具１０は、圧着刃型とも言い、電気接続用の端子をアルミニウム電線に対して圧着して電気的に保持するための工具である。アルミニウム電線用の端子圧着工具１０は、ほぼ直方体形状の部材であり、圧着溝２１を有している。   The terminal crimping tool 10 shown in FIG. 1 is also called a crimping blade type, and is a tool for crimping and electrically holding a terminal for electrical connection against an aluminum electric wire. The terminal crimping tool 10 for an aluminum electric wire is a substantially rectangular parallelepiped member and has a crimping groove 21.

図１に示す端子圧着工具１０の圧着溝２１は、図１のＳ方向から見てほぼ逆Ｖ字型に形成されており、圧着溝２１の最も内側の中央位置には１つの刃先２２が形成されている。刃先２２はほぼＭ字型であり、Ｈ方向に形成されている。   The crimping groove 21 of the terminal crimping tool 10 shown in FIG. 1 is formed in a substantially inverted V shape when viewed from the S direction in FIG. 1, and one cutting edge 22 is formed at the innermost central position of the crimping groove 21. Has been. The cutting edge 22 is substantially M-shaped and is formed in the H direction.

図２は、図１のＧ−Ｇ線における刃先２２の断面形状例を示している。
図２に示すように、刃先２２はＨ方向に沿って直線状に形成されており、刃先２２には段差はない。刃先２２のＨ方向の長さは、高圧縮長ＬＫで表し、端子圧着工具１０のＨ方向に関する全長は、バレル長ＬＢで表す。 FIG. 2 shows an example of a cross-sectional shape of the cutting edge 22 taken along the line GG of FIG.
As shown in FIG. 2, the blade edge 22 is formed linearly along the H direction, and the blade edge 22 has no step. The length of the cutting edge 22 in the H direction is represented by a high compression length LK, and the total length of the terminal crimping tool 10 in the H direction is represented by a barrel length LB.

図１と図２に示すように、刃先２２は、圧着端子の端子間接続部側の面取り部４１と、圧着端子の電線接続部側の面取り部４２を有している。面取り部４１の面取り角度θと面取り部４２の面取り角度αは、例えば４５度であるが、これらの角度は一例であり、特に限定されない。   As shown in FIGS. 1 and 2, the cutting edge 22 has a chamfered portion 41 on the inter-terminal connecting portion side of the crimp terminal and a chamfered portion 42 on the electric wire connecting portion side of the crimp terminal. The chamfering angle θ of the chamfered portion 41 and the chamfered angle α of the chamfered portion 42 are, for example, 45 degrees, but these angles are merely examples and are not particularly limited.

特徴的なのは、面取り部４２の大きさが、面取り部４１の大きさに比べて大きく設定されていることである。すなわち、面取り部４２のＨ方向の長さＴ２とＺ１方向の高さＲ２は、面取り部４１のＨ方向の長さＴ１とＺ１方向の高さＲ１に比べて、それぞれ大きく設定されている。これにより、面取り部４２は、面取り部４１に比べて刃先２２から大きく後退した形状になっている。   What is characteristic is that the size of the chamfered portion 42 is set larger than the size of the chamfered portion 41. That is, the length T2 in the H direction and the height R2 in the Z1 direction of the chamfered portion 42 are set larger than the length T1 in the H direction and the height R1 in the Z1 direction of the chamfered portion 41, respectively. As a result, the chamfered portion 42 has a shape that is greatly retracted from the cutting edge 22 compared to the chamfered portion 41.

図２における寸法例としては、バレル長ＬＢが例えば１４ｍｍであると、面取り角度αと面取り角度θは４５度であり、面取り部４２のＨ方向の長さＴ２とＺ１方向の高さＲ２は２．６ｍｍであって、面取り部４１のＨ方向の長さＴ１とＺ１方向の高さＲ１は０．６ｍｍである。端子圧着工具１０の端子間接続部側の端部は、バレル５６の板厚に対してプラスマイナス０．５ｍｍ程度の面取り部４１を形成することができる。   As an example of dimensions in FIG. 2, when the barrel length LB is 14 mm, for example, the chamfering angle α and the chamfering angle θ are 45 degrees, and the length T2 in the H direction and the height R2 in the Z1 direction of the chamfered portion 42 are 2. The chamfered portion 41 has a length T1 in the H direction and a height R1 in the Z1 direction of 0.6 mm. The end portion of the terminal crimping tool 10 on the inter-terminal connection portion side can form a chamfered portion 41 of about plus or minus 0.5 mm with respect to the plate thickness of the barrel 56.

図３（Ａ）と図３（Ｂ）と図３（Ｃ）は、アルミニウム電線用の端子圧着工具１０と、この端子圧着端子１０により圧着される圧着端子５０の形状例を示している。
図３に示す圧着端子５０は、端子間接続部５１と電線接続部５２を有している。端子間接続部５１は、コネクタハウジング内に挿入して嵌め合わされることで相手側の端子との間で電気的な接続を得る部分である。 FIGS. 3A, 3 </ b> B, and 3 </ b> C show examples of the shape of the terminal crimping tool 10 for an aluminum wire and the crimp terminal 50 that is crimped by the terminal crimp terminal 10.
A crimp terminal 50 shown in FIG. 3 has an inter-terminal connection portion 51 and an electric wire connection portion 52. The inter-terminal connecting portion 51 is a portion that obtains an electrical connection with a mating terminal by being inserted and fitted into the connector housing.

電線接続部５２は、アルミニウム電線５３の導体部５４に対して圧着することで、圧着端子５０と導体部５４の電気的導通を確保して、しかも圧着端子５０と導体部５４を機械的に保持する部分である。導体部５４は、複数本の導体の素線を撚り合わせて形成されており、被覆部５５により被覆されている。電線接続部５２は、バレル５６を有する。このバレル５６の第１端部７１は、端子間接続部側であり、バレル５６の第２端部７２は、第１端部７１の反対側である。   The wire connection portion 52 is crimped to the conductor portion 54 of the aluminum electric wire 53 to ensure electrical continuity between the crimp terminal 50 and the conductor portion 54 and to mechanically hold the crimp terminal 50 and the conductor portion 54. It is a part to do. The conductor portion 54 is formed by twisting strands of a plurality of conductors and is covered with a covering portion 55. The wire connection part 52 has a barrel 56. The first end portion 71 of the barrel 56 is on the inter-terminal connection portion side, and the second end portion 72 of the barrel 56 is on the opposite side of the first end portion 71.

なお、圧着端子５０の材料としては、電食防止の観点から異種金属を避けて、アルミニウム電線に合わせてアルミニウム合金系の材料を使用するのが望ましいが、必ずしもこの材料に限定されない。端子間接続部５１が空気により酸化したり、湿気により腐食するのを防ぐために、端子間接続部５１には、防錆用のグリースなどを塗布しておくと、より高い電気接続信頼性が得られる。   In addition, as a material of the crimp terminal 50, it is desirable to avoid a dissimilar metal from a viewpoint of electrolytic corrosion prevention, and to use an aluminum alloy type material according to an aluminum electric wire, but it is not necessarily limited to this material. In order to prevent the inter-terminal connection portion 51 from being oxidized by air or being corroded by moisture, it is possible to obtain higher electrical connection reliability by applying anti-rust grease or the like to the inter-terminal connection portion 51. It is done.

図２と図３に示す端子圧着工具１０の刃先２２は、対応するバレル５６を、アルミニウム電線５３の導体部５４に対してかしめる方向に高圧縮率で内側に屈曲させる。バレル５６は、アルミニウム電線５３の導体部５４に対して電気的導通を確実に得るために、高圧縮（圧縮率５０％〜７０％）でバレル５６を圧縮する。バレルの圧縮率は、バレルの減面率とも言い、圧縮率の値が小さいほどバレルは大きく屈曲されることになる。
この圧縮率とは、圧着部分のアルミニウム電線導体部断面積／圧着前のアルミニウム電線導体部断面積の比率である。 The cutting edge 22 of the terminal crimping tool 10 shown in FIGS. 2 and 3 bends the corresponding barrel 56 inwardly at a high compression rate in the caulking direction with respect to the conductor portion 54 of the aluminum electric wire 53. The barrel 56 compresses the barrel 56 with high compression (compression ratio 50% to 70%) in order to reliably obtain electrical continuity with respect to the conductor portion 54 of the aluminum electric wire 53. The compression ratio of the barrel is also referred to as a barrel area reduction ratio. The smaller the compression ratio value, the more the barrel is bent.
This compression rate is the ratio of the cross-sectional area of the aluminum wire conductor portion of the crimped portion / the cross-sectional area of the aluminum wire conductor portion before crimping.

このように、刃先２２がバレル５６を高圧縮率で加圧するのは、バレル５６に対応する領域において、アルミニウム電線の導体部５４の各撚り線（素線）とできるだけ多く電気的に接触できるようにすると同時に、アルミの表面酸化物を積極的に破壊することで十分で確実な電気的導通特性を得るためである。すなわち、図示例では、アルミニウム電線５３の導体部５４の直径が太いので、十分な圧着部の強度を得ることができることから、低圧縮率で圧着するための別の刃先は必要としないので、刃先２２は段付きの刃先にはなっていない。   In this way, the blade edge 22 pressurizes the barrel 56 at a high compressibility so that it can make electrical contact with each stranded wire (elementary wire) of the conductor portion 54 of the aluminum wire as much as possible in the region corresponding to the barrel 56. At the same time, it is to obtain sufficient and reliable electrical conduction characteristics by actively destroying the surface oxide of aluminum. That is, in the illustrated example, since the diameter of the conductor portion 54 of the aluminum electric wire 53 is large, a sufficient crimping portion strength can be obtained, and therefore, no separate cutting edge for crimping at a low compression rate is required. 22 is not a stepped cutting edge.

次に、図３を参照して、アルミニウム電線の端子圧着方法について説明する。
端子圧着工具１０が、圧着端子５０のバレル５６を屈曲させる場合には、端子圧着工具１０は、図示しないアクチュエータを作動することで、図３（Ａ）に示すＺ２方向に下げることで、図１に示す逆Ｖ字型の圧着溝２１は、バレル５６の先端部を押し付けて変形させる。図３（Ｂ）に示すように、Ｍ字型の刃先２２は、バレル５６の先端部を、かしめる方向（内側に）にアルミニウム電線５３の導体線５４に向かって屈曲される。 Next, with reference to FIG. 3, the terminal crimping method of an aluminum electric wire is demonstrated.
When the terminal crimping tool 10 bends the barrel 56 of the crimping terminal 50, the terminal crimping tool 10 operates in an actuator (not shown) to lower it in the Z2 direction shown in FIG. The reverse V-shaped crimp groove 21 shown in FIG. As shown in FIG. 3 (B), the M-shaped cutting edge 22 is bent toward the conductor wire 54 of the aluminum electric wire 53 in the direction (inward) of caulking the tip of the barrel 56.

これにより、バレル５６は、アルミニウム電線５３の導体線５４に対して高圧縮により深く食い込むように圧着されて電気的に確実に保持される。圧着端子５０は、バレル５６に対応する部分において導体部５４の表面酸化膜を破壊して十分な電気的な導通を確保することができる。
この圧着作業が終了すると、図３に示す端子圧着工具１０は、図示しないアクチュエータを作動することで、Ｚ１方向に上昇される。 Thereby, the barrel 56 is crimped so as to penetrate deeply into the conductor wire 54 of the aluminum electric wire 53 by high compression, and is securely held electrically. The crimp terminal 50 can ensure sufficient electrical conduction by destroying the surface oxide film of the conductor portion 54 at a portion corresponding to the barrel 56.
When this crimping operation is completed, the terminal crimping tool 10 shown in FIG. 3 is raised in the Z1 direction by operating an actuator (not shown).

ところで、図２に示すように、面取り部４２の大きさが、面取り部４１の大きさに比べて大きく設定されていて、面取り部４２は、面取り部４１に比べて刃先２２から大きく後退して逃げた形状になっている。このような面取り部４２の形状から、図３（Ｂ）と図３（Ｃ）に示すように、面取り部４２に対応する部分、すなわちバレル５６の第２端部７２には逃げ部８０が形成されている。   By the way, as shown in FIG. 2, the size of the chamfered portion 42 is set to be larger than the size of the chamfered portion 41, and the chamfered portion 42 recedes greatly from the cutting edge 22 compared to the chamfered portion 41. It is in an escaped shape. Due to the shape of the chamfered portion 42, as shown in FIGS. 3B and 3C, a relief portion 80 is formed at a portion corresponding to the chamfered portion 42, that is, at the second end portion 72 of the barrel 56. Has been.

圧着工具１０によりバレル５６を導体部５４に対して圧着することで、バレル５６には導体部５４を逃がして案内する逃げ部８０を徐々に広げて形成する。すなわち、端子圧着工具１０により、バレル５６を導体部５４に対して圧着することで、バレル５４の第２端部７２には、導体部５４の保持領域を拡げるための逃げ部８０が、徐々に広げて形成されることになる。   By crimping the barrel 56 to the conductor portion 54 with the crimping tool 10, the barrel 56 is formed with a relief portion 80 that gradually escapes and guides the conductor portion 54. In other words, by crimping the barrel 56 against the conductor portion 54 with the terminal crimping tool 10, the second end portion 72 of the barrel 54 is gradually provided with a relief portion 80 for expanding the holding region of the conductor portion 54. It will be spread out and formed.

このため、導体部５４の一部分は、逃げ部８０により急激な段差変化を緩和して開放することができ、導体部５４に加わる剪断力を低減することができる。従って、アルミニウム電線５３の導体部５４の芯線切れを防ぐことができ、アルミニウム電線の電気的な接続信頼性を確保できる。   For this reason, a part of the conductor part 54 can be opened by relaxing a sudden step change by the escape part 80, and the shearing force applied to the conductor part 54 can be reduced. Accordingly, it is possible to prevent the core wire of the conductor portion 54 of the aluminum electric wire 53 from being cut off, and to ensure electrical connection reliability of the aluminum electric wire.

上述した第１実施形態では、図３に示すように、あらかじめ圧着工具１０の面取り部４１に比べて、面取り部４２を大きく形成しておき、バレル５６の端子間接続部側（前方のベルマウス側に相当）に比べて、バレル５６の反対側（後方のベルマウス側に相当）を大きく屈曲させることで、導体部５４の逃げ部８０を積極的に形成している。これにより、この逃げ部８０は、導体部５４の急激な段差変化を緩和して、導体部５４にかかる剪断力を低下させている。   In the first embodiment described above, as shown in FIG. 3, the chamfered portion 42 is formed in advance larger than the chamfered portion 41 of the crimping tool 10, and the inter-terminal connecting portion side of the barrel 56 (front bellmouth) The escape portion 80 of the conductor portion 54 is positively formed by bending the opposite side of the barrel 56 (corresponding to the rear bell mouth side) largely. As a result, the escape portion 80 reduces a sudden step change of the conductor portion 54 and reduces the shearing force applied to the conductor portion 54.

＜第２実施形態＞
次に、図４〜図７を参照して、本発明の好ましい第２実施形態を説明する。
上述した本発明の第１実施形態に対して、次に説明する本発明の第２実施形態では、端子圧着工具１０Ｂは、刃先２２Ｂと、面取り部（第１面取り部に相当）４１Ｂと、面取り部（第２面取り部に相当）４２Ｂを有している。面取り部４１Ｂの面取り角度と面取り部４２Ｂの面取り角度が同じであり、面取り部４１Ｂと面取り部４２Ｂは同じ大きさである。 Second Embodiment
Next, a second preferred embodiment of the present invention will be described with reference to FIGS.
In contrast to the first embodiment of the present invention described above, in a second embodiment of the present invention described below, the terminal crimping tool 10B includes a cutting edge 22B, a chamfered portion (corresponding to a first chamfered portion) 41B, and a chamfer. Portion (corresponding to a second chamfered portion) 42B. The chamfering angle of the chamfered portion 41B and the chamfered portion 42B are the same, and the chamfered portion 41B and the chamfered portion 42B have the same size.

図４（Ａ）と図５に示すように、圧着端子５０Ｂは、端子間接続部５１Ｂと電線接続部５２Ｂを有している。端子間接続部５１Ｂは、コネクタハウジング内に挿入して嵌め合わされることで相手側の端子との間で電気的な接続を得る部分である。   As shown in FIGS. 4A and 5, the crimp terminal 50 </ b> B has an inter-terminal connection part 51 </ b> B and an electric wire connection part 52 </ b> B. The inter-terminal connecting portion 51B is a portion that obtains an electrical connection with a mating terminal by being inserted and fitted into the connector housing.

電線接続部５２Ｂは、アルミニウム電線５３の導体部５４に対して圧着することで、圧着端子５０Ｂと導体部５４の電気的導通を確保して、しかも圧着端子５０Ｂと導体部５４を機械的に接続して保持する部分である。導体部５４は、複数本の導体の素線を撚り合わせて形成されており、被覆部５５により被覆されている。電線接続部５２Ｂは、バレル５６Ｂを有する。このバレル５６Ｂの第１端部７１Ｂは、端子間接続部５１Ｂ側であり、バレル５６Ｂの第２端部７２Ｂは、第１端部７１Ｂの反対側である。   The wire connecting portion 52B is crimped to the conductor portion 54 of the aluminum electric wire 53, thereby ensuring electrical continuity between the crimp terminal 50B and the conductor portion 54, and mechanically connecting the crimp terminal 50B and the conductor portion 54. And hold it. The conductor portion 54 is formed by twisting strands of a plurality of conductors and is covered with a covering portion 55. The electric wire connection part 52B has a barrel 56B. The first end portion 71B of the barrel 56B is on the inter-terminal connection portion 51B side, and the second end portion 72B of the barrel 56B is on the opposite side of the first end portion 71B.

このバレル５６Ｂの後端部側、すなわちバレル５６Ｂの反対側（後方のベルマウス側に相当）には、あらかじめ逃げ部９０が形成されている。この逃げ部９０は、図６と図７に示すように、導体部５４を案内するために、あらかじめ外側に向けて徐々に広がって形成されている。すなわち、第２面取り部である面取り部４２Ｂに対応するバレル５６Ｂの部分には、導体部５４の保持領域を拡げるために徐々に広がった逃げ部９０が、あらかじめ形成されている。   An escape portion 90 is formed in advance on the rear end side of the barrel 56B, that is, on the opposite side of the barrel 56B (corresponding to the rear bell mouth side). As shown in FIGS. 6 and 7, the escape portion 90 is formed so as to gradually spread outward in order to guide the conductor portion 54. That is, in the portion of the barrel 56B corresponding to the chamfered portion 42B, which is the second chamfered portion, a relief portion 90 that gradually widens in order to expand the holding region of the conductor portion 54 is formed in advance.

従って、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。   Therefore, the electrical connection reliability of an aluminum electric wire is securable by reducing the shear force with respect to the conductor part of an aluminum electric wire, and preventing the core wire of a conductor part.

次に、図４（Ａ）〜図４（Ｃ）を参照して、アルミニウム電線の端子圧着方法について説明する。
端子圧着工具１０Ｂが、圧着端子５０Ｂのバレル５６Ｂを屈曲させる場合には、端子圧着工具１０Ｂは、図示しないアクチュエータを作動することで、図４（Ａ）に示すＺ２方向に下げることで、バレル５６の先端部を押し付けて変形させる。端子圧着工具１０Ｂは図４（Ａ）に示すＺ２方向にさらに下げることで、Ｍ字型の刃先２２は、バレル５６の先端部を、かしめる方向（内側に）にアルミニウム電線５３の導体線５４に向かって屈曲される。 Next, with reference to FIG. 4 (A)-FIG. 4 (C), the terminal crimping method of an aluminum electric wire is demonstrated.
When the terminal crimping tool 10B bends the barrel 56B of the crimp terminal 50B, the terminal crimping tool 10B operates the actuator (not shown) to lower it in the Z2 direction shown in FIG. Press the tip of to deform. The terminal crimping tool 10B is further lowered in the Z2 direction shown in FIG. 4A, so that the M-shaped cutting edge 22 has the conductor wire 54 of the aluminum electric wire 53 in the direction (inward) of caulking the tip of the barrel 56. Is bent toward.

これにより、バレル５６は、アルミニウム電線５３の導体線５４に対して高圧縮により深く食い込むように圧着されて電気的に確実に保持される。圧着端子５０は、バレル５６に対応する部分において導体部５４の表面酸化膜を破壊して十分な電気的な導通を確保することができる。
この圧着作業が終了すると、図４（Ｃ）に示すように端子圧着工具１０Ｂは、図示しないアクチュエータを作動することで、Ｚ１方向に上昇される。 Thereby, the barrel 56 is crimped so as to penetrate deeply into the conductor wire 54 of the aluminum electric wire 53 by high compression, and is securely held electrically. The crimp terminal 50 can ensure sufficient electrical conduction by destroying the surface oxide film of the conductor portion 54 at a portion corresponding to the barrel 56.
When this crimping operation is completed, the terminal crimping tool 10B is raised in the Z1 direction by operating an actuator (not shown) as shown in FIG.

逃げ部９０は、図６と図７に示すように、導体部５４を案内するために、あらかじめ外側に向けて徐々に広がって形成されている。このため、導体部５４の一部分は、逃げ部９０により急激な段差変化を緩和して開放することができ、導体部５４に加わる剪断力を低減することができる。従って、アルミニウム電線５３の導体部５４の芯線切れを防ぐことができ、アルミニウム電線の電気的な接続信頼性を確保できる。   As shown in FIGS. 6 and 7, the escape portion 90 is formed so as to gradually spread outward in advance in order to guide the conductor portion 54. For this reason, a part of the conductor part 54 can be released by relaxing a sudden step change by the escape part 90, and the shearing force applied to the conductor part 54 can be reduced. Accordingly, it is possible to prevent the core wire of the conductor portion 54 of the aluminum electric wire 53 from being cut off, and to ensure electrical connection reliability of the aluminum electric wire.

上述した第２実施形態では、図４に示すように、あらかじめバレル５６Ｂの他端部の内側には、すなわちバレル５６Ｂの第２端部７２Ｂには導体部５４の逃げ部９０が積極的に形成されている。これにより、この逃げ部９０は、導体部５４の急激な段差変化を緩和して、導体部５４にかかる剪断力を低下させている。従って、アルミニウム電線の導体部に対する剪断力を低減して導体部の芯線切れを防ぐことにより、アルミニウム電線の電気的な接続信頼性を確保できる。   In the second embodiment described above, as shown in FIG. 4, the escape portion 90 of the conductor portion 54 is positively formed in advance inside the other end portion of the barrel 56B, that is, at the second end portion 72B of the barrel 56B. Has been. As a result, the escape portion 90 reduces a sudden step change of the conductor portion 54 and reduces the shearing force applied to the conductor portion 54. Therefore, the electrical connection reliability of an aluminum electric wire is securable by reducing the shearing force with respect to the conductor part of an aluminum electric wire, and preventing the core wire of a conductor part from cut | disconnecting.

ところで、本発明は、上記実施形態に限定されず種々の変形例を採用できる。
例えば、端子圧着工具の面取り部の面取り角度は、４５度に限らず、任意に設定できる。 By the way, this invention is not limited to the said embodiment, A various modified example is employable.
For example, the chamfer angle of the chamfered portion of the terminal crimping tool is not limited to 45 degrees and can be set arbitrarily.

本発明のアルミニウム電線用の圧着端子をアルミニウム電線に電気的にかつ機械的に圧着するための圧着工具の好ましい第１実施形態を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first preferred embodiment of a crimping tool for electrically and mechanically crimping an aluminum wire crimping terminal of the present invention to an aluminum wire. 図１のＧ−Ｇ線における圧着工具の断面形状を示す図である。It is a figure which shows the cross-sectional shape of the crimping | compression-bonding tool in the GG line of FIG. 第１実施形態における端子圧着方法を示す図である。It is a figure which shows the terminal crimping method in 1st Embodiment. 本発明の第２実施形態における端子圧着方法を示す図である。It is a figure which shows the terminal crimping method in 2nd Embodiment of this invention. 第２実施形態における逃げ部に形状を示す正面図である。It is a front view which shows a shape in the escape part in 2nd Embodiment. 第２実施形態における逃げ部に形状を示す断面を有する斜視図である。It is a perspective view which has a cross section which shows a shape in the escape part in 2nd Embodiment. 第２実施形態における逃げ部に形状を示す断面を有する平面図である。It is a top view which has a cross section which shows a shape in the escape part in 2nd Embodiment. 従来の端子圧着方法を示す図である。It is a figure which shows the conventional terminal crimping method.

符号の説明Explanation of symbols

１０ 圧着工具
１０Ｂ 圧着工具
２１ 圧着溝
２２ 刃先
４１ 面取り部（第１面取り部）
４２ 面取り部（第２面取り部）
５０ 端子
５３ アルミニウム電線
５４ アルミニウム電線の導体部
５５ アルミニウム電線の被覆部
５６ バレル
７１ バレルの第１端部
７２ バレルの第２端部
７１Ｂ バレルの第１端部
７２Ｂ バレルの第２端部
８０，９０ 逃げ部 DESCRIPTION OF SYMBOLS 10 Crimping tool 10B Crimping tool 21 Crimping groove 22 Cutting edge 41 Chamfer (1st chamfer)
42 Chamfered part (second chamfered part)
50 Terminal 53 Aluminum Wire 54 Conductor of Aluminum Wire 55 Cover of Aluminum Wire 56 Barrel 71 First End of Barrel 72 Second End of Barrel 71B First End of Barrel 72B Second End of Barrel 80, 90 Escape

Claims (3)

端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備えるアルミニウム電線用の圧着端子であって、
前記電線接続部の前記バレルは、前記端子間接続部側に位置される第１端部と、前記第１端部とは反対側に位置される第２端部を有し、
前記第２端部には、前記導体部を案内するために徐々に広げた逃げ部が形成されていることを特徴とするアルミニウム電線用の圧着端子。 A crimp terminal for an aluminum electric wire comprising an inter-terminal connection part and an electric wire connection part having a barrel to be crimped to a conductor part of the aluminum electric wire,
The barrel of the wire connecting portion has a first end located on the inter-terminal connecting portion side and a second end located on the opposite side of the first end,
A crimp terminal for an aluminum electric wire, wherein a relief portion that is gradually widened to guide the conductor portion is formed at the second end portion. 端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備える圧着端子の前記バレルを、端子圧着工具により前記導体部に圧着する際に、
前記端子圧着工具の前記端子間接続部側の第１面取り部に比べて、前記第１面取り部の反対側に形成された前記端子圧着工具の第２面取り部が大きく、
前記電線接続部の前記バレルは、前記端子間接続部側に位置される第１端部と、前記第１端部とは反対側に位置される第２端部を有し、
前記端子圧着工具により前記バレルを前記導体部に対して圧着することで、前記バレルの前記第２端部には、前記導体部の保持領域を拡げるための逃げ部が、徐々に広げて形成されることを特徴とするアルミニウム電線の端子圧着方法。 When crimping the barrel of the crimp terminal including the terminal connection portion and the wire connection portion having a barrel crimped to the conductor portion of the aluminum electric wire to the conductor portion with a terminal crimping tool,
The second chamfered portion of the terminal crimping tool formed on the opposite side of the first chamfered portion is larger than the first chamfered portion on the interterminal connection portion side of the terminal crimping tool,
The barrel of the wire connecting portion has a first end located on the inter-terminal connecting portion side and a second end located on the opposite side of the first end,
By crimping the barrel to the conductor portion with the terminal crimping tool, a relief portion for expanding the holding region of the conductor portion is gradually widened at the second end portion of the barrel. A terminal crimping method for an aluminum electric wire. 端子間接続部と、アルミニウム電線の導体部に圧着されるバレルを有する電線接続部とを備える圧着端子の前記バレルを、端子圧着工具により前記導体部に圧着する際に、
前記端子圧着工具の前記端子間接続部側の第１面取り部と、前記第１面取り部の反対側に形成された前記端子圧着工具の第２面取り部とは同じ大きさであり、
前記第２面取り部に対応する前記バレルの部分には、前記導体部の保持領域を拡げるために徐々に広がった逃げ部が、あらかじめ形成されており、
前記端子圧着工具により前記バレルを前記導体部に対して圧着することを特徴とするアルミニウム電線の端子圧着方法。 When crimping the barrel of the crimp terminal including the terminal connection portion and the wire connection portion having a barrel crimped to the conductor portion of the aluminum electric wire to the conductor portion with a terminal crimping tool,
The first chamfered portion on the terminal connecting portion side of the terminal crimping tool and the second chamfered portion of the terminal crimping tool formed on the opposite side of the first chamfered portion are the same size.
In the part of the barrel corresponding to the second chamfered portion, a relief portion that gradually widens to expand the holding region of the conductor portion is formed in advance,
A terminal crimping method for an aluminum electric wire, wherein the barrel is crimped to the conductor portion by the terminal crimping tool.
JP2007258542A 2007-10-02 2007-10-02 Crimp terminal for aluminum wire and method of crimping terminal of aluminum wire Pending JP2009087848A (en)

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