JP2009175062A - Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section - Google Patents

Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section

Info

Publication number
JP2009175062A
JP2009175062A JP2008015724A JP2008015724A JP2009175062A JP 2009175062 A JP2009175062 A JP 2009175062A JP 2008015724 A JP2008015724 A JP 2008015724A JP 2008015724 A JP2008015724 A JP 2008015724A JP 2009175062 A JP2009175062 A JP 2009175062A
Authority
JP
Japan
Prior art keywords
terminal
electric wire
resistance
contact
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2008015724A
Other languages
Japanese (ja)
Inventor
Yuji Kanzaki
裕次 神崎
Koji Kawakami
耕司 川上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP2008015724A priority Critical patent/JP2009175062A/en
Publication of JP2009175062A publication Critical patent/JP2009175062A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To accurately measure a contact resistance of a terminal pressure-bonding section, even if the length of the terminal pressure-bonding section is varied. <P>SOLUTION: In a method, the resistances of the terminal pressure-bonding section 5 and a zone D, including a fixed length of en electric wire 1 from the terminal pressure-bonding section, are measured by a four-terminal method. The contact resistance of the terminal pressure-bonding section is obtained, by subtracting the resistance of the fixed length of the electric wire from the measured resistance. A first voltage terminal 7A, between a pair of the voltage terminals used for the four terminal method, contacts a terminal clasp 3 and has a fixed position. A second voltage terminal 7B contacts the electric wire 1, and has a position adjusted by a micrometer caliper 29 in the longitudinal direction of the electric wire. As an electric wire 17 with a terminal placed at a predetermined position, resistance measurement is implemented, after the position of the second voltage terminal 7B is adjusted so as to bring the second voltage terminal 7B into contact with the electric wire 1 at a fixed distance from an end T of the terminal pressure-bonding section on the electric wire side, in response to the position of the end T of the terminal pressure-bonding section 5 on the electric wire side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、電線と端子金具の圧着部分である端子圧着部の、電線と端子金具間の接触抵抗を測定する方法と、それに用いる測定装置に関するものである。   The present invention relates to a method for measuring a contact resistance between an electric wire and a terminal fitting at a terminal crimping portion which is a crimped portion between the electric wire and the terminal fitting, and a measuring apparatus used therefor.

一般に、自動車用ワイヤーハーネスなどに用いられる電線の端部には端子金具が圧着されている。この端子圧着部の良否を判定するために、端子圧着部の接触抵抗測定が行われる（引用文献１参照）。   In general, a terminal fitting is crimped to an end portion of an electric wire used for an automobile wire harness or the like. In order to determine the quality of the terminal crimping part, contact resistance measurement of the terminal crimping part is performed (see cited document 1).

従来、端子圧着部の接触抵抗測定は次のようにして行われている。まず、図５のように、電線１と端子金具３の圧着部分である端子圧着部５と、その端子圧着部５からある長さＡの電線１とを含む区間Ｂの抵抗を四端子法で測定する。   Conventionally, the contact resistance measurement of a terminal crimping part is performed as follows. First, as shown in FIG. 5, the resistance of the section B including the terminal crimping portion 5 which is a crimping portion of the electric wire 1 and the terminal fitting 3 and the electric wire 1 having a length A from the terminal crimping portion 5 is determined by the four-terminal method. taking measurement.

四端子法は、第一の電圧端子７Ａを区間Ｂの一端側で端子金具３に接触させ、第二の電圧端子７Ｂを区間Ｂの他端側で電線１（正確には絶縁被覆１ｂを剥いで露出させた導体１ａ、以下同じ）に接触させ、さらに、第一の電流端子９Ａを第一の電圧端子７Ａの外側で端子金具３に接触させ、第二の電流端子９Ｂを第二の電圧端子７Ｂの外側で電線１に接触させた状態で、抵抗測定器１１により、電流端子９Ａ、９Ｂ間に電流Ｉを流し、電圧端子７Ａ、７Ｂ間の電圧降下Ｖを測定して、Ｖ／Ｉ＝Ｒの式より区間Ｂの抵抗値を測定するものである。測定した抵抗値は表示部１３に表示される。   In the four-terminal method, the first voltage terminal 7A is brought into contact with the terminal fitting 3 at one end side of the section B, and the second voltage terminal 7B is stripped of the electric wire 1 (exactly the insulation coating 1b) at the other end side of the section B. The first current terminal 9A is brought into contact with the terminal fitting 3 outside the first voltage terminal 7A, and the second current terminal 9B is brought into contact with the second voltage. With the resistance meter 11 in contact with the electric wire 1 outside the terminal 7B, the current I is passed between the current terminals 9A and 9B, the voltage drop V between the voltage terminals 7A and 7B is measured, and V / I = The resistance value in the section B is measured from the equation of R. The measured resistance value is displayed on the display unit 13.

こうして測定した抵抗値から、別途測定してある基準となる電線の長さＡの抵抗値を差し引けば、端子圧着部５の接触抵抗を求めることができる。   The contact resistance of the terminal crimping part 5 can be obtained by subtracting the resistance value of the length A of the reference wire, which is separately measured, from the resistance value thus measured.

特開平９−２１８３６号公報JP-A-9-21836

従来は、一対の電圧端子７Ａ、７Ｂの間隔Ｂを一定に保って抵抗測定を行っていた。この測定方法によると、電線が単位長当たりの抵抗が小さい純銅線である場合には、端子圧着部の接触抵抗を比較的正確に測定できるが、電線が単位長当たりの抵抗が大きい銅合金線などになると、端子圧着部の接触抵抗の測定値に大きなバラツキが生じてしまい、正確な測定ができなくなることが判明した。電線の単位長当たりの抵抗が大きくなると測定値にバラツキが生じるのは、端子圧着部の接触抵抗に比べ電線の抵抗が相対的に大きくなることも一因であるが、バラツキの大きさはそれだけでは説明できないものであった。   Conventionally, resistance measurement is performed with the distance B between the pair of voltage terminals 7A and 7B kept constant. According to this measurement method, when the electric wire is a pure copper wire having a small resistance per unit length, the contact resistance of the terminal crimping portion can be measured relatively accurately, but the electric wire has a large resistance per unit length. In such a case, it has been found that the measured value of the contact resistance of the terminal crimping part varies greatly, and accurate measurement cannot be performed. The reason why the measured value varies when the resistance per unit length of the wire increases is partly because the resistance of the wire is relatively larger than the contact resistance of the terminal crimping part, but the size of the variation is that much. It was something that could not be explained.

そこで、その原因を究明した結果、端子圧着部５の長さが大きく関与していることが判明した。従来は、端子圧着部５の長さはほぼ一定なものと考え、一対の電圧端子７Ａ、７Ｂの間隔を一定に保って抵抗測定を行っていたが、端子金具のワイヤバレル部を電線端部に圧着した場合、圧着条件や電線の硬さ等によって端子圧着部５の長さＣにバラツキが生じるのである。例えば通常の端子金具のワイヤバレル部を比較的硬さの硬い銅合金線に圧着すると、圧着前に3mmのワイヤバレル部が圧着後に4.5mmにもなり、それに応じて端子圧着部の長さＣのバラツキも大きくなる。   Therefore, as a result of investigating the cause, it has been found that the length of the terminal crimping portion 5 is greatly involved. Conventionally, the length of the terminal crimping portion 5 is considered to be substantially constant, and resistance measurement is performed while keeping the distance between the pair of voltage terminals 7A and 7B constant. In the case of crimping, the length C of the terminal crimping portion 5 varies depending on the crimping conditions, the hardness of the electric wire, and the like. For example, when the wire barrel part of a normal terminal fitting is crimped to a relatively hard copper alloy wire, the wire barrel part of 3 mm becomes 4.5 mm after crimping before crimping, and the length C of the terminal crimping part accordingly. The variation will be larger.

電線の抵抗が小さい場合には、端子圧着部の長さＣに多少のバラツキがあっても、一定区間Ｂ内での電線の抵抗値の変動は相対的に小さいが、電線の抵抗が大きくなると、一定区間Ｂ内での電線の抵抗値の変動が相対的に大きくなるため、測定した端子圧着部の接触抵抗のバラツキが大きくなってしまうのである。例えば、一般にワイヤーハーネスに用いられる導体が純銅の電線は単位長当たりの抵抗値が0.2〜0.3mΩ／mm程度であるが、導体が銅合金の電線は単位長当たりの抵抗値が1.5 mΩ／mm程度になる。求める端子圧着部の接触抵抗値は2mΩ以下なので、端子圧着部の長さが1mm変動した場合、抵抗値が0.2〜0.3mΩ／mmの電線では約10〜15％の誤差であるが、抵抗値が1.5
mΩ／mmの電線では約75％の誤差となってしまう。 When the resistance of the electric wire is small, even if there is some variation in the length C of the terminal crimping portion, the fluctuation of the resistance value of the electric wire within the fixed section B is relatively small, but the resistance of the electric wire becomes large Since the fluctuation of the resistance value of the electric wire in the fixed section B is relatively large, the variation in the measured contact resistance of the terminal crimping portion becomes large. For example, a wire with a pure copper conductor generally used for a wire harness has a resistance value of about 0.2 to 0.3 mΩ / mm per unit length, while a wire with a copper alloy conductor has a resistance value of 1.5 mΩ / mm per unit length. It will be about. The contact resistance value of the terminal crimping part to be obtained is 2 mΩ or less, so if the length of the terminal crimping part varies by 1 mm, the resistance value is about 10 to 15% for wires with a resistance value of 0.2 to 0.3 mΩ / mm. 1.5
For mΩ / mm wires, the error is about 75%.

そこで、本発明の目的は、端子圧着部の長さが変化しても端子圧着部の接触抵抗の測定をほぼ正確に行うことができる、端子圧着部の接触抵抗測定方法と、それに用いる測定装置を提供することにある。   Accordingly, an object of the present invention is to provide a method for measuring the contact resistance of a terminal crimping portion and a measuring apparatus used therefor, which can measure the contact resistance of the terminal crimping portion almost accurately even if the length of the terminal crimping portion changes. Is to provide.

本発明は、電線と端子金具の圧着部分である端子圧着部と、その端子圧着部から一定長さの電線とを含む区間の抵抗を四端子法で測定し、測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求める端子圧着部の接触抵抗測定方法であって、
四端子法の一対の電圧端子のうち、前記端子金具に接触させる第一の電圧端子の位置は固定とし、前記電線に接触させる第二の電圧端子の位置は電線長さ方向に調節可能とし、
前記端子圧着部を有する端子付き電線を所定の位置に位置決めした状態で、前記端子圧着部の電線側端の位置に応じて、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、前記第二の電圧端子の位置を調節した後に、抵抗測定を行い、
こうして測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求めることを特徴とするものである。 The present invention measures the resistance of a section including a terminal crimping portion, which is a crimped portion of an electric wire and a terminal fitting, and an electric wire of a certain length from the terminal crimping portion by the four-terminal method, and from the measured resistance value, A method for measuring a contact resistance of a terminal crimping part to obtain a contact resistance of a terminal crimping part by subtracting the resistance value of the predetermined length,
Among the pair of voltage terminals of the four terminal method, the position of the first voltage terminal to be brought into contact with the terminal fitting is fixed, and the position of the second voltage terminal to be brought into contact with the electric wire is adjustable in the length direction of the electric wire,
In a state where the terminal-attached electric wire having the terminal crimping portion is positioned at a predetermined position, the second voltage terminal extends from the electric wire side end of the terminal crimping portion according to the position of the electric wire side end of the terminal crimping portion. After adjusting the position of the second voltage terminal so as to contact the wire at a position separated by a certain length, measure the resistance,
The contact resistance of the terminal crimping portion is obtained by subtracting the resistance value of the certain length of the electric wire from the resistance value thus measured.

また、本発明に係る端子圧着部の接触抵抗測定方法は、
四端子法の一対の電圧端子のうち、前記端子金具に接触させる第一の電圧端子の位置は固定とし、前記電線に接触させる第二の電圧端子の位置は電線長さ方向に調節可能とし、
前記端子圧着部を有する端子付き電線を所定の位置に位置決めした状態で、前記端子圧着部の電線側端の位置を検出し、検出した位置に基づき、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、前記第二の電圧端子の位置を調節した後に、抵抗測定を行い、
こうして測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求めるものであることが好ましい。 Moreover, the contact resistance measuring method of the terminal crimping part according to the present invention is as follows:
Among the pair of voltage terminals of the four terminal method, the position of the first voltage terminal to be brought into contact with the terminal fitting is fixed, and the position of the second voltage terminal to be brought into contact with the electric wire is adjustable in the length direction of the electric wire,
In a state where the terminal-attached electric wire having the terminal crimping portion is positioned at a predetermined position, the position of the terminal on the electric wire side of the terminal crimping portion is detected, and the second voltage terminal is based on the detected position. After adjusting the position of the second voltage terminal so as to contact the electric wire at a position away from the electric wire side end of the fixed length, resistance measurement is performed,
The contact resistance of the terminal crimping part is preferably obtained by subtracting the resistance value of the certain length of the electric wire from the resistance value thus measured.

本発明に係る端子圧着部の接触抵抗測定方法は、前記第二の電圧端子の位置調節をマイクロメーターで行うことが好ましい。   In the method for measuring the contact resistance of the terminal crimping portion according to the present invention, it is preferable to adjust the position of the second voltage terminal with a micrometer.

また、本発明に係る測定方法に使用する抵抗測定装置は、電線の端部に端子金具のワイヤバレル部を圧着した端子圧着部と、その端子圧着部から一定長さの電線とを含む区間の抵抗を四端子法で測定するものであって、
前記端子圧着部を含む端子付き電線を所定に位置に保持する下側台と、前記四端子法の一対の電圧端子及び一対の電流端子を支持する上側台とを備え、前記下側台及び上側台の少なくとも一方は相手方に接近・離反する方向に移動可能となっており、
前記四端子法の一対の電圧端子及び一対の電流端子のうち、端子金具に接触させる第一の電圧端子及び第一の電流端子と、電線に接触させる第二の電流端子は前記上側台の所定の位置に支持され、電線に接触させる第二の電圧端子は、前記上側台上に設置されたマイクロメーターによって、電線長さ方向の位置を調節できるように支持されていることを特徴とするものである。 In addition, the resistance measuring device used in the measuring method according to the present invention includes a terminal crimping portion in which a wire barrel portion of a terminal fitting is crimped to an end portion of an electric wire, and a section including an electric wire having a certain length from the terminal crimping portion. The resistance is measured by the four probe method,
A lower base for holding the terminal-attached electric wire including the terminal crimping portion in a predetermined position; and an upper base for supporting the pair of voltage terminals and the pair of current terminals of the four-terminal method, the lower base and the upper side At least one of the platforms can move in a direction approaching or leaving the opponent,
Of the pair of voltage terminals and the pair of current terminals of the four-terminal method, the first voltage terminal and the first current terminal to be brought into contact with the terminal fitting and the second current terminal to be brought into contact with the electric wire are predetermined on the upper base. The second voltage terminal that is supported at the position of and is in contact with the electric wire is supported by a micrometer installed on the upper base so that the position in the electric wire length direction can be adjusted. It is.

また、本発明に係る抵抗測定装置は、前記上側台に前記端子圧着部の電線側端の位置を検出する位置検出器を設け、さらに、この位置検出器で検出した位置に基づき、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、マイクロメーターを駆動制御するマイクロメーター制御部を設けたものであることが好ましい。   Further, the resistance measuring device according to the present invention is provided with a position detector for detecting the position of the wire crimping end of the terminal crimping portion on the upper base, and further, based on the position detected by the position detector, the second It is preferable that a micrometer control unit for driving and controlling the micrometer is provided so that the voltage terminal contacts the electric wire at a position away from the electric wire side end of the terminal crimping portion by the predetermined length.

また、本発明に係る抵抗測定装置は、上記構成の抵抗測定装置に、さらに、基準となる電線の前記一定長さの抵抗を測定する第二の抵抗測定器と、この第二の抵抗測定器で測定した抵抗値を、上記構成の抵抗測定装置で測定した抵抗値から差し引いて端子圧着部の接触抵抗を求める演算手段とを付加したものであることが好ましい。   Moreover, the resistance measuring device according to the present invention includes a second resistance measuring device that measures the resistance of the predetermined length of the reference electric wire, and the second resistance measuring device. It is preferable to add arithmetic means for subtracting the resistance value measured in step 1 from the resistance value measured by the resistance measuring device having the above-described configuration to obtain the contact resistance of the terminal crimping portion.

本発明によれば、端子圧着部の電線側端の位置に応じて、第二の電圧端子が当該端子圧着部の電線側端から一定長さだけ離れた位置で電線に接触するように、第二の電圧端子の位置を調節した後に、抵抗測定を行うので、端子圧着部の長さが変化しても抵抗測定区間に含まれる電線の長さは常に一定となる。したがって測定した抵抗値から、基準となる電線の一定長さの抵抗値を差し引くことにより、端子圧着部の接触抵抗を正確に求めることができる。   According to the present invention, in accordance with the position of the terminal side of the terminal crimping portion, the second voltage terminal is in contact with the wire at a position away from the wire side end of the terminal crimping portion by a certain length. Since the resistance measurement is performed after adjusting the position of the second voltage terminal, the length of the electric wire included in the resistance measurement section is always constant even if the length of the terminal crimping portion changes. Therefore, the contact resistance of the terminal crimping portion can be accurately obtained by subtracting the resistance value of a certain length of the reference electric wire from the measured resistance value.

また、第二の電圧端子の位置調節をマイクロメーターで行うことにより、μｍオーダーの微細な位置調節が行えるので、より正確な測定を行うことができる。   Further, by adjusting the position of the second voltage terminal with a micrometer, fine position adjustment on the order of μm can be performed, so that more accurate measurement can be performed.

また、端子圧着部の電線側端の位置を検出する位置検出器を設けることにより、検出した位置信号に基づいてマイクロメーターを自動調節することが可能となり、測定作業を容易に効率よく行うことができる。   In addition, by providing a position detector that detects the position of the wire crimping end of the terminal crimping part, it is possible to automatically adjust the micrometer based on the detected position signal, making measurement work easy and efficient. it can.

また、第二の抵抗測定器と演算手段をさらに付加すれば、端子圧着部を含む端子付き電線の抵抗測定と、基準となる電線の抵抗測定を同時に行い、両者の測定値から端子圧着部の接触抵抗を直ちに求めることができる。   In addition, if a second resistance measuring instrument and calculation means are further added, the resistance measurement of the electric wire with the terminal including the terminal crimping portion and the resistance measurement of the reference electric wire are simultaneously performed, Contact resistance can be determined immediately.

＜実施形態１＞ 図１は本発明の一実施形態を示す。図１において、先に説明した図５と同一部分には同一符号を付してある。また、符号１５は電線１の端部に端子金具３を圧着した端子付き電線１７を載せる下側固定台、１９は四端子法の一対の電圧端子７Ａ、７Ｂ及び一対の電流端子９Ａ、９Ｂを支持する上側可動台、２１は上側可動台１９を上下方向（矢印Ｐ方向）に移動させるアクチュエータである。
下側固定台１５の上面には、端子付き電線１７をセットする位置決め溝２３が形成され、この位置決め溝２３の一端側にはストッパー２５が設けられている。これにより端子付き電線１７は、端子金具３の先端をストッパー２５に突き当てて、位置決め溝２３に落とし込むことで、四端子７Ａ、７Ｂ、９Ａ、９Ｂの真下の所定の位置にセットできるようになっている。 Embodiment 1 FIG. 1 shows an embodiment of the present invention. In FIG. 1, the same parts as those shown in FIG. Reference numeral 15 denotes a lower fixing base on which the terminal-attached electric wire 17 is crimped to the end of the electric wire 1, and 19 denotes a pair of voltage terminals 7A and 7B and a pair of current terminals 9A and 9B of the four-terminal method. An upper movable table 21 to be supported is an actuator 21 for moving the upper movable table 19 in the vertical direction (arrow P direction).
A positioning groove 23 for setting the terminal-attached electric wire 17 is formed on the upper surface of the lower fixing base 15, and a stopper 25 is provided on one end side of the positioning groove 23. Thus, the terminal-attached electric wire 17 can be set at a predetermined position just below the four terminals 7A, 7B, 9A, and 9B by abutting the tip of the terminal fitting 3 against the stopper 25 and dropping it into the positioning groove 23. ing.

一方、四端子のうち、端子金具３に接触させる第一の電圧端子７Ａ及び第一の電流端子９Ａと、電線１に接触させる第二の電流端子９Ｂは、上側可動台１９の所定の位置に支持され、電線１に接触させる第二の電圧端子７Ｂは、上側可動台１９上に電線長さ方向（矢印Ｑ方向）に移動可能に設置されたスライダ２７に支持されている。そしてスライダ２７は、上側可動台１９上に設置されたマイクロメーター２９によって電線長さ方向の位置を調節できるようになっている。   On the other hand, among the four terminals, the first voltage terminal 7 </ b> A and the first current terminal 9 </ b> A that are brought into contact with the terminal fitting 3 and the second current terminal 9 </ b> B that is brought into contact with the electric wire 1 are placed at predetermined positions on the upper movable table 19. The second voltage terminal 7B that is supported and brought into contact with the electric wire 1 is supported by a slider 27 that is installed on the upper movable table 19 so as to be movable in the electric wire length direction (arrow Q direction). The slider 27 can be adjusted in position in the electric wire length direction by a micrometer 29 installed on the upper movable table 19.

上記のように構成された装置で抵抗測定を行う場合には、まず、図１のように端子付き電線１７をセットした状態で、端子圧着部５の電線側端Ｔから第二の電圧端子７Ｂまでの長さＤが予め定められた一定の長さ（例えば100mm）となるように、マイクロメーター２９により第二の電圧端子７Ｂの位置を調節する。なお、端子圧着部５の電線側端Ｔの位置は、例えば端子金具３の先端から端子圧着部５の電線側端Ｔまでの長さを測定すること等により、予め基準位置からのズレとして求めておく。マイクロメーター２９は、そのズレに相当する量の位置調節を行う。   When performing resistance measurement with the apparatus configured as described above, first, with the terminal-attached electric wire 17 set as shown in FIG. 1, the second voltage terminal 7B from the electric wire side end T of the terminal crimping portion 5 is set. The position of the second voltage terminal 7 </ b> B is adjusted by the micrometer 29 so that the length D becomes a predetermined constant length (for example, 100 mm). The position of the electric wire side end T of the terminal crimping portion 5 is obtained in advance as a deviation from the reference position, for example, by measuring the length from the tip of the terminal fitting 3 to the electric wire side end T of the terminal crimping portion 5. Keep it. The micrometer 29 adjusts the position by an amount corresponding to the deviation.

次に上側可動台１９を下降させ、第一の電圧端子７Ａと第一の電圧端子９Ａを端子金具３に接触させると共に、第二の電圧端子７Ｂと第二の電流端子９Ｂを電線１に接触させて、抵抗測定を行う。このようにすれば、端子圧着部５の長さの変化に関係なく、抵抗測定区間（７Ａ、７Ｂ間）に含まれる電線１の長さは常に一定となるから、測定した抵抗値は、端子圧着部５の接触抵抗と、端子圧着部５の電線側端Ｔから一定長さの電線１の抵抗を合わせたものとなる。したがって測定した抵抗値から、基準となる電線の一定長さの抵抗値を差し引くことにより、端子圧着部の接触抵抗を正確に求めることができる。   Next, the upper movable table 19 is lowered, the first voltage terminal 7A and the first voltage terminal 9A are brought into contact with the terminal fitting 3, and the second voltage terminal 7B and the second current terminal 9B are brought into contact with the electric wire 1. And measure the resistance. In this way, the length of the electric wire 1 included in the resistance measurement section (between 7A and 7B) is always constant regardless of the change in the length of the terminal crimping portion 5, so that the measured resistance value is the terminal The contact resistance of the crimping part 5 and the resistance of the electric wire 1 having a certain length from the electric wire side end T of the terminal crimping part 5 are combined. Therefore, the contact resistance of the terminal crimping portion can be accurately obtained by subtracting the resistance value of a certain length of the reference electric wire from the measured resistance value.

なお、この実施形態では、上側可動台１９の周辺に下向きに壁３１が形成されている。この壁３１は、上側可動台１９を下降させたときに下側固定台１５の上面に接触して、抵抗測定時に空気の流れや温度変化により測定値がバラツクのを防止するためのものである。   In this embodiment, a wall 31 is formed downward around the upper movable table 19. This wall 31 is in contact with the upper surface of the lower fixed base 15 when the upper movable base 19 is lowered, and prevents the measurement value from being varied due to the flow of air or temperature change during resistance measurement. .

＜実施形態２＞ 図２は本発明の他の実施形態を示す。図２において、図１と同一部分には同一符号を付してあるので、重複する説明は省略する。この実施形態が実施形態１と異なる点は、上側可動台１９に端子圧着部５の電線側端Ｔを含む領域を撮影するカメラ３３を取り付け、このカメラ３３で撮影した画像を位置検出器３５で画像処理して、端子圧着部５の電線側端Ｔの位置（基準位置からのズレ）を検出し、その検出信号をマイクロメーター２９の制御部３７に入力して、マイクロメーター２９を駆動制御するようにしたものである。 Embodiment 2 FIG. 2 shows another embodiment of the present invention. In FIG. 2, the same parts as those in FIG. This embodiment is different from the first embodiment in that a camera 33 that captures an area including the electric wire side end T of the terminal crimping portion 5 is attached to the upper movable table 19, and an image captured by the camera 33 is captured by the position detector 35. Image processing is performed to detect the position (displacement from the reference position) of the wire-side end T of the terminal crimping portion 5, and the detection signal is input to the control unit 37 of the micrometer 29 to drive and control the micrometer 29. It is what I did.

このようにすれば、自動で、第二の電圧端子７Ｂが端子圧着部の電線側端Ｔから一定長さＤだけ離れた位置で電線１に接触するように、第二の電圧端子７Ｂの位置を制御することができる。   In this way, the position of the second voltage terminal 7B is automatically adjusted so that the second voltage terminal 7B contacts the electric wire 1 at a position separated from the electric wire side end T of the terminal crimping portion by a certain length D. Can be controlled.

＜実施形態３＞ 図３及び図４は本発明のさらに他の実施形態を示す。図３及び図４において、図２と同一部分には同一符号を付してあるので、重複する説明は省略する。この実施形態は、図４に示すように、下側固定台１５上に、実施形態１、２と同じ位置決め溝２３と、これとは別にもう１本の位置決め溝３９を形成し、位置決め溝２３には実施形態１、２と同様に端子圧着部５を有する端子付き電線１７をセットし、もう１本の位置決め溝３９には基準となる電線４１をセットして、端子付き電線１７と電線４１の抵抗測定を同時に行うものである。図３において、矢印Ａの部分（下半部分）は端子圧着部５を含む端子付き電線１７の抵抗を測定する部分であり（この部分の構成は図２と同じ）、矢印Ｂの部分（上半部分）は基準となる電線４１の抵抗を測定する部分である。 <Third Embodiment> FIGS. 3 and 4 show still another embodiment of the present invention. 3 and 4, the same parts as those in FIG. 2 are denoted by the same reference numerals, and redundant description is omitted. In this embodiment, as shown in FIG. 4, the same positioning groove 23 as that of Embodiments 1 and 2 and another positioning groove 39 are formed on the lower fixing base 15 separately from the positioning groove 23. In the same manner as in the first and second embodiments, the terminal-attached electric wire 17 having the terminal crimping portion 5 is set, the reference electric wire 41 is set in the other positioning groove 39, and the terminal-attached electric wire 17 and the electric wire 41 are set. The resistance is measured simultaneously. In FIG. 3, a portion indicated by an arrow A (lower half portion) is a portion for measuring the resistance of the terminal-attached electric wire 17 including the terminal crimping portion 5 (the configuration of this portion is the same as that shown in FIG. 2). The half part) is a part for measuring the resistance of the electric wire 41 serving as a reference.

上側可動台１９には、電線４１の抵抗を四端子法で測定するための、一対の電圧端子４３Ａ、４３Ｂ及び一対の電流端子４５Ａ、４５Ｂが取り付けられている。一対の電圧端子４３Ａ、４３Ｂの間隔Ｅは予め定められた一定の長さ（例えば100mm）に固定されている。第二の抵抗測定器４７は、実施形態１、２の抵抗測定１１と同様にして抵抗を測定するものである。   A pair of voltage terminals 43 </ b> A and 43 </ b> B and a pair of current terminals 45 </ b> A and 45 </ b> B for measuring the resistance of the electric wire 41 by the four-terminal method are attached to the upper movable table 19. An interval E between the pair of voltage terminals 43A and 43B is fixed to a predetermined length (for example, 100 mm). The second resistance measuring device 47 measures the resistance in the same manner as the resistance measurement 11 of the first and second embodiments.

このような構成にすると、上側可動台１９を下降させることにより、端子圧着部５を含む端子付き電線１７の抵抗と、基準となる電線４１の抵抗を同時に測定することができる。したがって、二つの抵抗測定器１１、４７で測定した抵抗値を演算部４９に入力し、演算部４９で端子圧着部５を含む端子付き電線１７の抵抗値から基準となる電線４１の抵抗値を引算すれば、直ちに端子圧着部５の接触抵抗を求めることができる。求めた接触抵抗値は表示部５１に表示される。   With such a configuration, by lowering the upper movable table 19, the resistance of the terminal-attached electric wire 17 including the terminal crimping portion 5 and the resistance of the reference electric wire 41 can be measured simultaneously. Therefore, the resistance values measured by the two resistance measuring devices 11 and 47 are input to the calculation unit 49, and the calculation unit 49 calculates the resistance value of the wire 41 as a reference from the resistance value of the terminal-attached electric wire 17 including the terminal crimping unit 5. By subtracting, the contact resistance of the terminal crimping part 5 can be obtained immediately. The obtained contact resistance value is displayed on the display unit 51.

本発明に係る端子圧着部の接触抵抗測定方法に使用する測定装置の一実施形態を示す断面図。Sectional drawing which shows one Embodiment of the measuring apparatus used for the contact resistance measuring method of the terminal crimping part which concerns on this invention. 同じく他の実施形態を示す断面図。Sectional drawing which similarly shows other embodiment. 同じくさらに他の実施形態を示す断面図。Sectional drawing which shows other embodiment similarly. 図３の装置の下側固定台上に端子付き電線及び基準となる電線をセットした状態を示す平面図。The top view which shows the state which set the electric wire with a terminal and the electric wire used as a reference | standard on the lower fixed stand of the apparatus of FIG. 従来の端子圧着部の接触抵抗測定方法を示す説明図。Explanatory drawing which shows the contact resistance measuring method of the conventional terminal crimping part.

符号の説明Explanation of symbols

１：電線
３：端子金具
５：端子圧着部
７Ａ、７Ｂ：電圧端子
９Ａ、９Ｂ：電流端子
１１：抵抗測定器
１３：表示部
１５：下側固定台
１７：端子付き電線
１９：上側可動台
２１：アクチュエータ
２３：位置決め溝
２５：ストッパー
２７：スライダ
２９：マイクロメーター
３１：壁
３３：カメラ
３５：位置検出器
３７：マイクロメーター制御部
３９：位置決め溝
４１：基準となる電線
４３Ａ、４３Ｂ：電圧端子
４５Ａ、４５Ｂ：電流端子
４７：第二の抵抗測定器
４９：演算部
５１：表示部 1: Electric wire 3: Terminal fitting 5: Terminal crimping portion 7A, 7B: Voltage terminal 9A, 9B: Current terminal 11: Resistance measuring device 13: Display unit 15: Lower fixed base 17: Electric wire with terminal 19: Upper movable base 21 : Actuator 23: Positioning groove 25: Stopper 27: Slider 29: Micrometer 31: Wall 33: Camera 35: Position detector 37: Micrometer control unit 39: Positioning groove 41: Reference electric wires 43A, 43B: Voltage terminal 45A 45B: Current terminal 47: Second resistance measuring device 49: Calculation unit 51: Display unit

Claims (6)

電線と端子金具の圧着部分である端子圧着部と、その端子圧着部から一定長さの電線とを含む区間の抵抗を四端子法で測定し、測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求める端子圧着部の接触抵抗測定方法であって、
四端子法の一対の電圧端子のうち、前記端子金具に接触させる第一の電圧端子の位置は固定とし、前記電線に接触させる第二の電圧端子の位置は電線長さ方向に調節可能とし、
前記端子圧着部を有する端子付き電線を所定の位置に位置決めした状態で、前記端子圧着部の電線側端の位置に応じて、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、前記第二の電圧端子の位置を調節した後に、抵抗測定を行い、
こうして測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求めることを特徴とする端子圧着部の接触抵抗測定方法。 The resistance of the section including the terminal crimping part, which is a crimping part of the electric wire and the terminal fitting, and the electric wire of a certain length from the terminal crimping part is measured by the four-terminal method, and the constant length of the electric wire is determined from the measured resistance value. The contact resistance measurement method for the terminal crimping part to obtain the contact resistance of the terminal crimping part by subtracting the resistance value of
Among the pair of voltage terminals of the four terminal method, the position of the first voltage terminal to be brought into contact with the terminal fitting is fixed, and the position of the second voltage terminal to be brought into contact with the electric wire is adjustable in the length direction of the electric wire,
In a state where the terminal-attached electric wire having the terminal crimping portion is positioned at a predetermined position, the second voltage terminal extends from the electric wire side end of the terminal crimping portion according to the position of the electric wire side end of the terminal crimping portion. After adjusting the position of the second voltage terminal so as to contact the wire at a position separated by a certain length, measure the resistance,
A method for measuring the contact resistance of a terminal crimping portion, wherein the contact resistance of the terminal crimping portion is obtained by subtracting the resistance value of the predetermined length of the electric wire from the resistance value thus measured. 電線と端子金具の圧着部分である端子圧着部と、その端子圧着部から一定長さの電線とを含む区間の抵抗を四端子法で測定し、測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求める端子圧着部の接触抵抗測定方法であって、
四端子法の一対の電圧端子のうち、前記端子金具に接触させる第一の電圧端子の位置は固定とし、前記電線に接触させる第二の電圧端子の位置は電線長さ方向に調節可能とし、
前記端子圧着部を有する端子付き電線を所定の位置に位置決めした状態で、前記端子圧着部の電線側端の位置を検出し、検出した位置に基づき、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、前記第二の電圧端子の位置を調節した後に、抵抗測定を行い、
こうして測定した抵抗値から、電線の前記一定長さの抵抗値を差し引いて端子圧着部の接触抵抗を求めることを特徴とする端子圧着部の接触抵抗測定方法。 The resistance of the section including the terminal crimping part, which is a crimping part of the electric wire and the terminal fitting, and the electric wire of a certain length from the terminal crimping part is measured by the four-terminal method, and the constant length of the electric wire is determined from the measured resistance value. The contact resistance measurement method for the terminal crimping part to obtain the contact resistance of the terminal crimping part by subtracting the resistance value of
Among the pair of voltage terminals of the four terminal method, the position of the first voltage terminal to be brought into contact with the terminal fitting is fixed, and the position of the second voltage terminal to be brought into contact with the electric wire is adjustable in the length direction of the electric wire,
In a state where the terminal-attached electric wire having the terminal crimping portion is positioned at a predetermined position, the position of the terminal on the electric wire side of the terminal crimping portion is detected, and the second voltage terminal is based on the detected position. After adjusting the position of the second voltage terminal so as to contact the electric wire at a position away from the electric wire side end of the fixed length, resistance measurement is performed,
A method for measuring the contact resistance of a terminal crimping portion, wherein the contact resistance of the terminal crimping portion is obtained by subtracting the resistance value of the predetermined length of the electric wire from the resistance value thus measured. 前記第二の電圧端子の位置調節をマイクロメーターで行うことを特徴とする請求項１又は２記載の端子圧着部の接触抵抗測定方法。   The contact resistance measurement method for a terminal crimping part according to claim 1 or 2, wherein the position of the second voltage terminal is adjusted with a micrometer. 電線の端部に端子金具のワイヤバレル部を圧着した端子圧着部と、その端子圧着部から一定長さの電線とを含む区間の抵抗を四端子法で測定する装置であって、
前記端子圧着部を含む端子付き電線を所定に位置に保持する下側台と、前記四端子法の一対の電圧端子及び一対の電流端子を支持する上側台とを備え、前記下側台及び上側台の少なくとも一方は相手方に接近・離反する方向に移動可能となっており、
前記四端子法の一対の電圧端子及び一対の電流端子のうち、端子金具に接触させる第一の電圧端子及び第一の電流端子と、電線に接触させる第二の電流端子は前記上側台の所定の位置に支持され、電線に接触させる第二の電圧端子は、前記上側台上に設置されたマイクロメーターによって、電線長さ方向の位置を調節できるように支持されていることを特徴とする抵抗測定装置。 A device for measuring the resistance of a section including a terminal crimping portion in which a wire barrel portion of a terminal fitting is crimped to an end portion of an electric wire, and an electric wire having a certain length from the terminal crimping portion by a four-terminal method,
A lower base for holding the terminal-attached electric wire including the terminal crimping portion in a predetermined position; and an upper base for supporting the pair of voltage terminals and the pair of current terminals of the four-terminal method, the lower base and the upper side At least one of the platforms can move in a direction approaching or leaving the opponent,
Of the pair of voltage terminals and the pair of current terminals of the four-terminal method, the first voltage terminal and the first current terminal to be brought into contact with the terminal fitting and the second current terminal to be brought into contact with the electric wire are predetermined on the upper base. The second voltage terminal that is supported at the position of and is in contact with the electric wire is supported by a micrometer installed on the upper base so that the position in the length direction of the electric wire can be adjusted. measuring device. 前記上側台に前記端子圧着部の電線側端の位置を検出する位置検出器を設け、さらに、この位置検出器で検出した位置に基づき、前記第二の電圧端子が当該端子圧着部の電線側端から前記一定長さだけ離れた位置で電線に接触するように、マイクロメーターを駆動制御するマイクロメーター制御部を設けたことを特徴とする請求項４記載の抵抗測定装置。   A position detector that detects the position of the end of the terminal crimping portion on the wire side is provided on the upper base, and further, based on the position detected by the position detector, the second voltage terminal is connected to the wire side of the terminal crimping portion. 5. The resistance measuring apparatus according to claim 4, further comprising a micrometer control unit for driving and controlling the micrometer so as to contact the electric wire at a position separated from the end by the predetermined length. 請求項４又は５記載の抵抗測定装置に、さらに、基準となる電線の前記一定長さの抵抗を測定する第二の抵抗測定器と、この第二の抵抗測定器で測定した抵抗値を、請求項４又は５記載の抵抗測定装置で測定した抵抗値から差し引いて端子圧着部の接触抵抗を求める演算手段とを付加したことを特徴とする端子圧着部の接触抵抗測定装置。   The resistance measuring apparatus according to claim 4 or 5, further comprising a second resistance measuring device for measuring the resistance of the fixed length of the reference electric wire, and a resistance value measured by the second resistance measuring device, 6. A contact resistance measuring device for a terminal crimping part, comprising: a calculating means for subtracting the resistance measured by the resistance measuring device according to claim 4 or 5 to obtain a contact resistance of the terminal crimping part.
JP2008015724A 2008-01-28 2008-01-28 Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section Pending JP2009175062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008015724A JP2009175062A (en) 2008-01-28 2008-01-28 Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008015724A JP2009175062A (en) 2008-01-28 2008-01-28 Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section

Publications (1)

Publication Number Publication Date
JP2009175062A true JP2009175062A (en) 2009-08-06

Family

ID=41030302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008015724A Pending JP2009175062A (en) 2008-01-28 2008-01-28 Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section

Country Status (1)

Country Link
JP (1) JP2009175062A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604994A (en) * 2013-12-16 2014-02-26 苏州大学 Test method of electrode impedances of electrochemical power supply and electrochemical energy storage device and apparatus thereof
CN110532639A (en) * 2019-08-05 2019-12-03 三峡大学 Cable intermediate joint contact surface calculation of contact resistance method based on magnetic induction intensity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000123654A (en) * 1998-10-09 2000-04-28 Yazaki Corp Distinguishing method and device
JP2000207956A (en) * 1999-01-19 2000-07-28 Sumitomo Wiring Syst Ltd Automatic evaluation device of wire having terminal
JP2005300240A (en) * 2004-04-08 2005-10-27 Hioki Ee Corp Circuit conductors inspection method and its system
WO2007043345A1 (en) * 2005-09-30 2007-04-19 Autonetworks Technologies, Ltd. Method for manufacturing electric wire with terminals, electric wire with terminals, and terminal crimping device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000123654A (en) * 1998-10-09 2000-04-28 Yazaki Corp Distinguishing method and device
JP2000207956A (en) * 1999-01-19 2000-07-28 Sumitomo Wiring Syst Ltd Automatic evaluation device of wire having terminal
JP2005300240A (en) * 2004-04-08 2005-10-27 Hioki Ee Corp Circuit conductors inspection method and its system
WO2007043345A1 (en) * 2005-09-30 2007-04-19 Autonetworks Technologies, Ltd. Method for manufacturing electric wire with terminals, electric wire with terminals, and terminal crimping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604994A (en) * 2013-12-16 2014-02-26 苏州大学 Test method of electrode impedances of electrochemical power supply and electrochemical energy storage device and apparatus thereof
CN110532639A (en) * 2019-08-05 2019-12-03 三峡大学 Cable intermediate joint contact surface calculation of contact resistance method based on magnetic induction intensity
CN110532639B (en) * 2019-08-05 2023-06-02 三峡大学 Cable intermediate joint contact surface contact resistance calculation method based on magnetic induction intensity

Similar Documents

Publication Publication Date Title
US10748680B2 (en) Resistor and method for the production thereof
JP2013164381A (en) Alignment method of substrate inspection device, and substrate inspection device
JP2009175062A (en) Contact resistance measurement method and measurement apparatus of terminal pressure-bonding section
JP4865516B2 (en) measuring device
JP2015225040A (en) Substrate inspection device and inspection jig
JP2011108695A (en) Semiconductor inspection device, method of inspecting semiconductor device, and inspection program of semiconductor device
JP6633949B2 (en) Substrate inspection device and substrate inspection method
JP2009008516A (en) Tool and method for substrate inspection
JP5245279B2 (en) Substrate inspection jig and electrode structure of connection electrode portion in this jig
JP2014071091A (en) Probe unit and inspection device
JP6999327B2 (en) Board inspection equipment
JP6417716B2 (en) Substrate inspection device and inspection jig
JP3814600B2 (en) Minute potential difference measuring device
JP2011185641A (en) Temperature sensor and temperature measuring device using the same
JP2008261678A (en) Inspection probe contact detection mechanism and circuit board inspection device
US20020126734A1 (en) Soldering iron temperature measurement jig and methods of making and using the same
TW201428305A (en) Inspection method for test jig
KR100253692B1 (en) Apparatus for measuring width of crack
JP6757533B2 (en) Soldering quality judgment method and judgment device
JP2004184374A (en) Impedance measuring apparatus
KR101006565B1 (en) electric resistance measuring instrument of nanoparticle and that&#39;s method
JP5849923B2 (en) Impedance measuring device
JP2001074630A (en) Solderability-testing device and method
GB2551163A (en) Hot-wire additive manufacture
JP2003347370A (en) Evaluating equipment and evaluating method of semiconductor wafer

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20101001

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20101108

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20101108

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120223

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120312

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20120717