JPH05109460A - Method for detecting terminal crimp failure of terminal crimp electric wire - Google Patents

Method for detecting terminal crimp failure of terminal crimp electric wire

Info

Publication number
JPH05109460A
JPH05109460A JP3267618A JP26761891A JPH05109460A JP H05109460 A JPH05109460 A JP H05109460A JP 3267618 A JP3267618 A JP 3267618A JP 26761891 A JP26761891 A JP 26761891A JP H05109460 A JPH05109460 A JP H05109460A
Authority
JP
Japan
Prior art keywords
terminal
crimping
load sensor
detecting
electric wire
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
JP3267618A
Other languages
Japanese (ja)
Inventor
Fumihiko Abe
文彦 安倍
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 JP3267618A priority Critical patent/JPH05109460A/en
Publication of JPH05109460A publication Critical patent/JPH05109460A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/0486—Crimping apparatus or processes with force measuring means

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

PURPOSE:To provide a method for detecting a terminal crimp failure of a terminal-crimped electric wire capable of precisely detecting the failure in terminal crimp by correcting the error caused by a load sensor deteriorating with age. CONSTITUTION:A method for detecting a terminal crimp failure comprises peeling a coat from a terminal crimp electric wire to expose the conductor, detecting the crimping force at the time of crimping a terminal for connection to the terminal of the wire having the conductor exposed by a load sensor 10, and judging from the detected crimping force whether the crimped sate of the terminal is good or not. The error caused by the load sensor 10 deteriorating with age is corrected by using one of two or more physically different crimp peak waveforms detected by the load sensor 10 as a reference value.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は被覆を剥離して導体を裸
出した電線の端末に端子を圧着する際の圧着不良を検出
する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a crimping defect when crimping a terminal to an end of an electric wire in which a conductor is bare and a conductor is exposed.

【０００２】[0002]

【従来の技術】被覆電線の端末に端子を圧着する場合、
或る一定長に切断した被覆電線の端末の被覆を所定長さ
だけ剥離し、一定の形状及び寸法の端子を当該端末に装
着して圧着する。即ち、端子Ｔは、図６及び図７に示す
ように、リードキャリアＴｃに複数個連続的に連設され
ており、端子圧着に際しては、このリードキャリアＴｃ
から端子Ｔを切断し、図８（ａ）に示すように、被覆把
持部Ｔ1 で電線Ｗの被覆部Ｗ1 を全周に亘り、且つその
被覆部から僅かな距離を残して確実につかみ、導体把持
部Ｔ2 で導体（芯線）Ｗ2 を全周に亘り確実につかむよ
うにして圧着し、当該電線Ｗの端末に端子Ｔを圧着す
る。2. Description of the Related Art When crimping a terminal to the end of a covered electric wire,
The coating of the end of the coated electric wire cut into a certain length is peeled off for a predetermined length, and a terminal having a certain shape and size is attached to the terminal and crimped. That is, as shown in FIG. 6 and FIG. 7, a plurality of terminals T are continuously connected to the lead carrier Tc.
8A, the terminal T is cut off, and as shown in FIG. 8A, the wire gripping portion T 1 securely grips the wire covering portion W 1 of the wire W over the entire circumference and leaving a small distance from the wire covering portion. Then, the conductor (core wire) W 2 is crimped so as to be surely gripped over the entire circumference by the conductor grip portion T 2 , and the terminal T is crimped to the end of the electric wire W.

【０００３】かかる電線Ｗへの端子Ｔの圧着は端子圧着
装置により自動的に行われるが、圧着時に導体Ｗ2 の一
部が導体把持部Ｔ2 からはみ出したり（いわゆる「芯線
こぼれ」、図８（ｂ）参照）、端子Ｔの被覆把持部Ｗ1
が導体Ｗ2 をつかんだり（いわゆる「首吊り」、図８
（ｃ）参照）、或いは導体把持部Ｔ2 が被覆部Ｗ1 をつ
かんだり（いわゆる「樹脂かみ」、図８（ｄ）参照）す
る等、種々の圧着不良が発生する。Although the crimping of the terminal T to the electric wire W is automatically performed by the crimping device, a part of the conductor W 2 may protrude from the conductor gripping portion T 2 during crimping (so-called "core wire spill", FIG. 8). (See (b)), the covering grip portion W 1 of the terminal T
Grabs the conductor W 2 (so-called “hanging”, FIG. 8).
(See (c)), or the conductor gripping portion T 2 grips the covering portion W 1 (so-called “resin bite”, see FIG. 8D), and various other crimping defects occur.

【０００４】このような端子圧着不良を検出する方法と
して、本願出願人は端子圧着時の圧力を荷重センサによ
り検出し、端子圧着時の異常を荷重センサのレベルによ
り判別することで、前記各種の端子圧着不良を検出する
ようにした「電線端子圧着状態判別方法」（特願昭５９
−１０１４６７）を提案している。As a method for detecting such a terminal crimping defect, the applicant of the present application detects the pressure at the time of crimping the terminal with a load sensor, and determines the abnormality at the time of crimping the terminal by the level of the load sensor. "Wire terminal crimping state determination method" for detecting terminal crimping defects (Japanese Patent Application No. 59)
-101467) is proposed.

【０００５】[0005]

【発明が解決しようとする課題】ところで、荷重センサ
は、温度ドリフト、残留歪、ヒステリシス、ゲージ疲労
等の経時変化に伴う誤差により、圧着時における出力波
形の大きさにバラつきを生ずる。このため、端子圧着時
の圧着状態を、例えば、出力波形のピーク値で判断する
と、ピーク値には上記経時変化に伴う誤差が含まれてい
ることから、端子圧着の不良を正確に判別することがで
きないという問題があった。By the way, in the load sensor, the magnitude of the output waveform at the time of crimping varies due to an error caused by a change with time such as temperature drift, residual strain, hysteresis, and gauge fatigue. Therefore, if the crimping state at the time of crimping the terminal is judged, for example, by the peak value of the output waveform, the peak value includes the error due to the above-mentioned change over time, so that the crimping of the terminal should be accurately discriminated. There was a problem that I could not.

【０００６】本発明は上述の問題点を解決するためにな
されたもので、荷重センサの経時変化に伴う誤差を補正
して、端子圧着の不良を正確に検出することが可能な端
子圧着電線の端子圧着不良検出方法を提供することを目
的とする。The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a terminal crimping wire capable of accurately detecting a terminal crimping defect by correcting an error caused by a change with time of a load sensor. An object of the present invention is to provide a terminal crimping failure detection method.

【０００７】[0007]

【課題を解決するための手段】上記目的を達成するため
に本発明によれば、端子圧着電線から被覆を剥離して導
体を露出させ、導体を露出させた当該電線の端末に端子
を圧着する時の圧着力を荷重センサにより検出し、検出
した当該圧着力から前記端子の圧着状態の良否を判定す
る端子圧着電線の端子圧着不良検出方法において、前記
荷重センサが検出する物理的に異なる二以上の圧着ピー
ク波形の一つを参照値として前記荷重センサの経時変化
を補正する構成としたものである。To achieve the above object, according to the present invention, the coating is peeled off from the terminal crimping wire to expose the conductor, and the terminal is crimped to the end of the exposed wire. The crimping force at the time is detected by a load sensor, and the quality of the crimping state of the terminal is determined from the detected crimping force. With one of the crimping peak waveforms of No. 2 as a reference value, the change over time of the load sensor is corrected.

【０００８】[0008]

【作用】荷重センサが検出する物理的に異なる二以上の
圧着ピーク波形の一つを参照値として、経時変化による
測定誤差の補正値を求め、この補正値に基づいて測定値
を補正する。The correction value for the measurement error due to a change over time is obtained using one of two or more physically different crimping peak waveforms detected by the load sensor as a reference value, and the measurement value is corrected based on this correction value.

【０００９】[0009]

【実施例】以下、本発明の一実施例を図１乃至図５に基
づいて詳細に説明する。図１は本発明を適用した端子圧
着装置を示し、端子圧着装置１はプレスフレーム２、当
該プレスフレーム２に配置される端子圧着台３、当該端
子圧着台３の上方に上下動可能に配置されるアプリケー
タ４、当該アプリケータ４の下端に装着される端子圧着
用型押部５、アプリケータ４の上端に下端を固定され、
且つプレスフレーム２の中央のフレーム２ａに穿設され
た孔２ｂを摺動可能に嵌挿されるラム６、当該ラム６を
上下動させるトグル装置７及び端子配給レバー８等によ
り構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a terminal crimping device to which the present invention is applied. The terminal crimping device 1 is provided with a press frame 2, a terminal crimping base 3 arranged on the press frame 2, and a movable vertically above the terminal crimping base 3. The applicator 4 which is attached to the lower end of the applicator 4, the crimping part 5 for terminal crimping, the lower end of which is fixed to the upper end of the applicator 4,
The ram 6 is slidably fitted in a hole 2b formed in the center frame 2a of the press frame 2, a toggle device 7 for vertically moving the ram 6, a terminal distribution lever 8 and the like.

【００１０】トグル装置７は上方リンク７１と、下方リ
ンク７２と、トグル７３と、フライホイール７４とを備
え、これらの上方リンク７１と下方リンク７２とトグル
７３との各一端は軸７５により回動可能に枢支され、上
方リンク７１の他端は固定部７６に、下方リンクの他端
はラム６の上端に、トグル７３の他端はフライホイール
７４の周縁に夫々回動、回転自在に軸支されている。フ
ライホイール７４は図示しないモータにより回転され、
当該フライホイール７４の回転はトグル７３及び上、下
の各リンク７１、７２を介してラム６に伝達され、当該
ラム６が上下に往復動される。The toggle device 7 is provided with an upper link 71, a lower link 72, a toggle 73 and a flywheel 74, and one end of each of the upper link 71, the lower link 72 and the toggle 73 is rotated by a shaft 75. The other end of the upper link 71 is pivotally and rotatably supported on the fixed portion 76, the other end of the lower link is on the upper end of the ram 6, and the other end of the toggle 73 is on the periphery of the flywheel 74. It is supported. The flywheel 74 is rotated by a motor (not shown),
The rotation of the flywheel 74 is transmitted to the ram 6 via the toggle 73 and the upper and lower links 71 and 72, and the ram 6 reciprocates up and down.

【００１１】端子配給レバー８は、上端を軸８１を介し
て回動可能に枢支され、中央部に設けられた駆動溝８２
内に、一端をアプリケータ４の上端に固定されたアーム
８３の他端がピンを介して係合され、下端には杆８４を
装着されている。この端子配給レバー８は、アプリケー
タ４の上下動により左右に揺動されて杆８４を左右に駆
動し、多数の端子が帯状に連綴されたリードキャリアＴ
ｃから端子Ｔを１個づつ端子台３上に配給する。The terminal distribution lever 8 is rotatably supported at its upper end via a shaft 81, and has a drive groove 82 provided at the center thereof.
An arm 83 having one end fixed to the upper end of the applicator 4 is engaged with the other end through a pin, and a rod 84 is attached to the lower end. The terminal distribution lever 8 is swung left and right by the vertical movement of the applicator 4 to drive the rod 84 left and right, and a lead carrier T in which a large number of terminals are continuously bound in a strip shape.
The terminals T are distributed one by one onto the terminal block 3 from c.

【００１２】トグル装置７は上、下の各リンク７１、７
２の枢支点（軸７５の位置）をトグル７３により押すと
これらの両リンク７１、７２が一直線に近付くに従って
リンクの長さ方向の力即ち、これらのリンク７１、７２
の長さ方向に沿って垂直方向に押す力Ｐが大きくなる。
両リンク７１、７２の長さが等しいものとし、垂直線と
リンク７２とのなす角をθ、トグル７５の押圧力をＦと
すると、リンク７２がラム６を押下する力Ｐは次式で表
される。The toggle device 7 has upper and lower links 71, 7 respectively.
When the two pivots (the position of the shaft 75) are pushed by the toggle 73, as the two links 71, 72 approach a straight line, the longitudinal force of the links, that is, the links 71, 72.
The pushing force P in the vertical direction increases along the length direction of the.
Assuming that the links 71 and 72 have the same length, the angle between the vertical line and the link 72 is θ, and the pressing force of the toggle 75 is F, the force P by which the link 72 presses the ram 6 is expressed by the following equation. To be done.

【００１３】Ｐ＝Ｆ／（２ｔａｎθ） この力Ｐは、端子圧着用型押部５が端子台３上の端子Ｔ
を圧着する力（以下圧着力という）である。従って、ラ
ム６は端子圧着時に当該圧着力Ｐの反力ＰR(＝Ｐ）を受
ける。そこで、このラム６に作用する反力ＰR を検出す
る。ラム６は所定位置、例えば、下部を図１及び図２に
示すように全周に亘り軸方向と直角方向に断面コ字状に
切り欠かれて細身の柱６ａとされ、この柱６ａに荷重セ
ンサ１０が配設されている。P = F / (2 tan θ) This force P is applied to the terminal crimping die pressing portion 5 on the terminal T on the terminal block 3.
Is the force for crimping (hereinafter referred to as crimping force). Therefore, the ram 6 receives the reaction force P R (= P) of the crimping force P when the terminals are crimped. Therefore, the reaction force P R acting on the ram 6 is detected. The ram 6 is cut at a predetermined position, for example, the lower portion along the entire circumference in a direction perpendicular to the axial direction in a U-shaped cross section to form a slender pillar 6a, and a load is applied to the pillar 6a. A sensor 10 is provided.

【００１４】荷重センサ１０は２つの圧力センサ１１、
１２から成り、一方の圧力センサ１１は、図２に示すよ
うに、柱６ａの前面６ｂに、他方の圧力センサ１２は裏
面に夫々配設されている。圧力センサ１１は、例えば、
２枚のロードセル１３、１４により構成され、これらの
各ロードセル１３、１４は互いに直交して配置され、一
方のロードセル１３は柱６ａの軸方向（縦方向）に沿っ
て、他方のロードセル１４は軸方向と直角方向（横方
向）に沿って貼着される。ロードセル１３は柱６ａの縦
方向の伸縮（歪）に応じて、ロードセル１４は横方向の
伸縮（歪）に応じて抵抗値が変化する。The load sensor 10 comprises two pressure sensors 11,
As shown in FIG. 2, one pressure sensor 11 is provided on the front surface 6b of the column 6a, and the other pressure sensor 12 is provided on the back surface thereof. The pressure sensor 11 is, for example,
Each of the load cells 13 and 14 is arranged orthogonally to each other. One load cell 13 is along the axial direction (longitudinal direction) of the pillar 6a, and the other load cell 14 is axial. It is attached along the direction perpendicular to the direction (lateral direction). The resistance value of the load cell 13 changes in accordance with the vertical expansion / contraction (distortion) of the pillar 6a, and that of the load cell 14 changes in accordance with the horizontal expansion / contraction (strain).

【００１５】ラム６の柱６ａの裏面に配置される圧力セ
ンサ１２も、前面６ｂに配置された圧力センサ１１と同
様に２枚のロードセル１５、１６により構成され、且つ
圧力センサ１１と略対称位置に貼着されている。この荷
重センサ１０は、ラム６による端子圧着時に当該ラム６
の柱６ａに発生する前記歪みを検出することにより当該
ラム６に加わる前記圧着力の反力を検出する。尚、ラム
６に細身の柱６ａを形成して当該柱６ａの歪みを検出す
ることにより端子圧着時に当該ラム６に発生する反力を
高感度に検出することが可能となる。The pressure sensor 12 arranged on the back surface of the column 6a of the ram 6 is also composed of two load cells 15 and 16 like the pressure sensor 11 arranged on the front surface 6b, and at a position substantially symmetrical to the pressure sensor 11. It is attached to. This load sensor 10 is used when the ram 6 presses the terminal.
The reaction force of the crimping force applied to the ram 6 is detected by detecting the strain generated in the column 6a. By forming a slender pillar 6a on the ram 6 and detecting the distortion of the pillar 6a, it is possible to detect with high sensitivity the reaction force generated in the ram 6 when the terminals are crimped.

【００１６】荷重センサ１０の各圧力センサ１１、１２
の各ロードセル１３、１４及び１５、１６は、図３に示
すようにブリッジ回路に接続され、ロードセル１３と１
５、１４と１６との各接続点ａ、ｂは所定の電源１７に
接続され、ロードセル１３と１４、１５と１６との各接
続点ｃ、ｄは端子１０ａ、１０ｂに接続される。荷重セ
ンサ１０の各端子１０ａ、１０ｂは、図４に示すよう
に、パターン判定回路２０のストレンアンプ２１の入力
端子に接続され、ストレンアンプ２１の出力端子はアナ
ログ−デジタル変換器（以下Ａ／Ｄ変換器という）２２
及び比較器２３の各入力端子に接続される。比較器２３
の出力端子は、Ａ／Ｄ変換器２２のトリガ入力端子に接
続され、Ａ／Ｄ変換器２２の出力端子はメモリ２４の入
力端子に接続される。このメモリ２４は、更に中央演算
処理装置（以下、「ＣＰＵ」という）２５に接続され
る。Each pressure sensor 11, 12 of the load sensor 10
Load cells 13, 14 and 15, 16 are connected to a bridge circuit as shown in FIG.
Connection points a and b with 5, 14 and 16 are connected to a predetermined power source 17, and connection points c and d with load cells 13 and 14 and 15 and 16 are connected to terminals 10a and 10b. As shown in FIG. 4, each terminal 10a, 10b of the load sensor 10 is connected to the input terminal of the strain amplifier 21 of the pattern determination circuit 20, and the output terminal of the strain amplifier 21 is an analog-digital converter (hereinafter referred to as A / D converter). 22)
And each input terminal of the comparator 23. Comparator 23
Of the A / D converter 22 is connected to the trigger input terminal of the A / D converter 22, and the output terminal of the A / D converter 22 is connected to the input terminal of the memory 24. The memory 24 is further connected to a central processing unit (hereinafter referred to as “CPU”) 25.

【００１７】以上のように構成される端子圧着装置１を
用いた本発明の端子不良検出方法を以下に説明する。ト
グル装置７は、フライホイール７４の回転をトグル７３
及び上、下の各リンク７１、７２を介してラム６を往復
動させ、アプリケータ４を往復動させる。一方、アプリ
ケータ４の往復動に応じて端子配給レバー８が左右に揺
動して杆８４を介してリードキャリアＴｃから端子Ｔを
１個づつ切断し、端子圧着台３上に供給する。同時に電
線（図示せず）が端子圧着台３に供給され、端末の被覆
部が端子Ｔの被覆把持部上に、導体が導体把持部上に夫
々載置される。The terminal defect detecting method of the present invention using the terminal crimping device 1 configured as described above will be described below. The toggle device 7 toggles the rotation of the flywheel 74.
The ram 6 is reciprocated via the upper and lower links 71 and 72, and the applicator 4 is reciprocated. On the other hand, in response to the reciprocating motion of the applicator 4, the terminal distribution lever 8 swings to the left and right to cut the terminals T one by one from the lead carrier Tc via the rod 84 and supply them onto the terminal crimping table 3. At the same time, an electric wire (not shown) is supplied to the terminal crimping base 3, the covering portion of the terminal is placed on the covering grip portion of the terminal T, and the conductor is placed on the conductor gripping portion.

【００１８】電線Ｗが端子Ｔに載置された後、下動する
アプリケータ４の下端に装着された型押部５が端子圧着
台３上に電線の端末と共に載置された端子Ｔを圧着す
る。この端子Ｔの圧着時にラム６に反力が加わり、柱６
ａに歪が発生する。荷重センサ１０は、この柱６ａに発
生する歪みを検出して対応する電気信号（歪み信号）Ｖ
を出力する。After the electric wire W is placed on the terminal T, the embossing portion 5 mounted on the lower end of the applicator 4 moving downward crimps the terminal T placed on the terminal crimping base 3 together with the end of the electric wire. To do. When the terminal T is crimped, a reaction force is applied to the ram 6,
Distortion occurs in a. The load sensor 10 detects the strain generated in the column 6a and outputs the corresponding electric signal (strain signal) V.
Is output.

【００１９】この荷重センサ１０から出力された信号Ｖ
はストレンアンプ２１により増幅された後Ａ／Ｄ変換器
２２及び比較器２３に入力される。比較器２３は、入力
された信号Ｖと基準信号Ｖｓとを比較し、Ｖ＞Ｖｓの時
にトリガ信号Ｐｔを出力してＡ／Ｄ変換器２２にレベル
トリガをかける。Ａ／Ｄ変換器２２は、このトリガ信号
Ｐｔが印加されるとサンプリングを開始し、入力される
信号Ｖの波形をサンプリングしてＡ／Ｄ変換を行い、当
該波形を時系列でメモリ２４に格納する。尚、比較器２
３の基準信号Ｖｓは後述する端子圧着時に発生する共通
波形の立ち上がりを捉えられる程度の電圧レベルに設定
され、当該レベル以上の信号は全てサンプリングを行
う。The signal V output from the load sensor 10
Is amplified by the strain amplifier 21 and then input to the A / D converter 22 and the comparator 23. The comparator 23 compares the input signal V with the reference signal Vs, outputs a trigger signal Pt when V> Vs, and applies a level trigger to the A / D converter 22. The A / D converter 22 starts sampling when the trigger signal Pt is applied, samples the waveform of the input signal V, performs A / D conversion, and stores the waveform in the memory 24 in time series. To do. Incidentally, the comparator 2
The reference signal Vs of No. 3 is set to a voltage level at which the rising edge of a common waveform generated when terminals are crimped, which will be described later, can be captured, and all signals above the level are sampled.

【００２０】信号Ｖの波形のサンプリング周期は、使用
するプレスの作動時間により異なるが、本実施例の場合
は圧着周期が約 0.8秒であり、圧着時間は約 80 m sec
である。従って、波形を400 等分程度にすれば再現性の
良い波形が得られるために約200 μsec の周期でサンプ
リングする。ＣＰＵ２５は、メモリ２４に格納された正
常な圧着状態の信号波形（以下正常波形という）を記憶
しておき、当該記憶している正常波形と各端子圧着時の
各波形とを逐次比較し、当該波形が正常であるか異常で
あるかを判定し、異常と判定したときには異常判定信号
Ｖｏを出力する。The sampling period of the waveform of the signal V varies depending on the operating time of the press used, but in this embodiment, the crimping period is about 0.8 seconds and the crimping time is about 80 msec.
Is. Therefore, if the waveform is divided into 400 equal parts, a waveform with good reproducibility can be obtained, so sampling is performed at a cycle of about 200 μsec. The CPU 25 stores a signal waveform in a normal crimping state (hereinafter referred to as a normal waveform) stored in the memory 24, successively compares the stored normal waveform and each waveform at the time of crimping each terminal, and It is determined whether the waveform is normal or abnormal, and when it is determined to be abnormal, the abnormality determination signal Vo is output.

【００２１】ここで、上記一連の動作に伴う荷重センサ
１０が出力する電気信号の波形について見ると、図５に
示すように、端子圧着装置１の作動開始時ｔ0 から所定
時間経過した時刻ｔ1 において端子Ｔを切断するときの
ピークＡが現れ、その後徐々に、ピークＢを有する端子
Ｔの電線Ｗへの圧着に伴う圧着波形が現れる。このと
き、端子圧着状態及び荷重センサ１０の感度が一様であ
れば、リードキャリアＴｃから端子Ｔを切断する際のピ
ークＡと端子圧着時のピークＢの比率は一定になる。Here, looking at the waveform of the electric signal output from the load sensor 10 associated with the above series of operations, as shown in FIG. 5, a time t when a predetermined time has elapsed from the time t 0 when the operation of the terminal crimping device 1 started. In FIG. 1 , a peak A appears when the terminal T is cut, and then a crimp waveform accompanying the crimping of the terminal T having the peak B to the electric wire W gradually appears. At this time, if the terminal crimping state and the sensitivity of the load sensor 10 are uniform, the ratio of the peak A at the time of cutting the terminal T from the lead carrier Tc and the peak B at the time of terminal crimping becomes constant.

【００２２】従って、正常時における端子Ｔの切断の際
のピーク値を予め測定し、この値を基準切断ピーク値Ｎ
AO、比較判定時における端子Ｔの切断に伴う測定ピーク
値をＮAi、端子圧着時の測定ピーク値をＮBiとすれば、
補正値ＮC は次式で定められる。 ＮC ＝（ＮAi・ＮBi）／ＮAO 本発明方法においては、この補正値ＮC に基づいて、荷
重センサ１０の経時変化に伴う測定誤差を補正すること
で、端子圧着の不良を正確に検出するものである。Therefore, the peak value when the terminal T is normally disconnected is measured in advance, and this value is used as the reference disconnection peak value N.
AO, the measured peak value N Ai due to cleavage of the terminal T when the comparison determination, if the measured peak value at terminal crimping and N Bi,
The correction value N C is determined by the following equation. N C = (N Ai · N Bi ) / N AO According to the method of the present invention, by correcting the measurement error due to the change with time of the load sensor 10 based on this correction value N C , the terminal crimping defect can be accurately detected. Is to be detected by.

【００２３】ここで、各ピークＡ，Ｂは、荷重センサ１
０が出力する電気信号の波形を微分することで求めても
よく、端子Ｔを切断するときのピークＡを、傾斜勾配が
−から＋に変化する点とし、端子Ｔを圧着するときのピ
ークＢを全体の波形の最大ピークとする。また、以上の
ようにしてパターン判定回路２０のＣＰＵ２５から出力
された異常判定信号Ｖｏは、警報ランプ等の警報装置に
供給されて作業者に端子圧着の異常発生を知らせる。ま
た、自動端子圧着装置では通常、端子打された電線は一
定数量（例えば、100 〜200 本単位）で自動結束して搬
出機構により装置外に搬出するように構成されているの
で、前記異常判定信号Ｖｏにより搬出時に前記異常判定
された結束電線を別途に排出させるようにしても良い。
これにより、不良端子付電線が次工程に搬送されること
を防止することができる。Here, each of the peaks A and B is the load sensor 1.
It may be obtained by differentiating the waveform of the electric signal output by 0, and the peak A when the terminal T is cut is the point at which the inclination gradient changes from − to +, and the peak B when the terminal T is crimped. Is the maximum peak of the entire waveform. Further, the abnormality determination signal Vo output from the CPU 25 of the pattern determination circuit 20 as described above is supplied to an alarm device such as an alarm lamp to notify an operator of the occurrence of an abnormality in terminal crimping. In addition, the automatic terminal crimping device is usually configured to automatically bundle a fixed number of wires (for example, in units of 100 to 200) and carry them out of the device by the carry-out mechanism. It is also possible to separately discharge the bundled electric wire that has been determined to be abnormal when it is carried out by the signal Vo.
As a result, it is possible to prevent the electric wire with the defective terminal from being conveyed to the next step.

【００２４】更に、異常種別毎に異常判定信号を出力さ
せ、各種別毎に異常数をカウントするカウンタを設けて
そのカウント値を表示させるようにすることにより、異
常に起因する端子圧着装置の不具合箇所を知ることがで
きる。例えば、「樹脂かみ」のカンウト数が極端に多い
場合には電線の被覆を剥離するワイヤストリッパの異常
であり、「芯線こぼれ」のカウント数が多い場合には端
子の圧着位置の設定ミスの可能性がある等の判断をする
ことができる。Further, by outputting an abnormality determination signal for each abnormality type, providing a counter for counting the number of abnormalities for each type, and displaying the count value, malfunction of the terminal crimping device caused by the abnormality You can know the place. For example, if the number of "resin bite" is extremely large, it is an abnormality of the wire stripper that peels off the wire coating. If the number of "core spills" is large, it is possible that the crimping position of the terminal is set incorrectly. It is possible to judge that there is a nature.

【００２５】尚、上記実施例においては、ラム６に加わ
る圧着時の反力を検出する荷重センサとして歪み抵抗素
子を使用したロードセルを用いた場合について記述した
が、これに限るものではなく、他の例えば、圧電変換素
子、磁気抵抗素子、静電容量素子等の荷重−電気変換素
子を使用しても良い。更に、本実施例においては、ラム
６に荷重センサを取り付けたが、例えば、トグル装置の
リンクや、アプリケータの端子圧着用型押部等、他の構
成部材に取り付けてもよい。In the above embodiment, the case where the load cell using the strain resistance element is used as the load sensor for detecting the reaction force applied to the ram 6 at the time of crimping is described, but the present invention is not limited to this. For example, a load-electric conversion element such as a piezoelectric conversion element, a magnetoresistive element, or a capacitance element may be used. Further, although the load sensor is attached to the ram 6 in the present embodiment, it may be attached to other constituent members such as a link of the toggle device and a terminal crimping embossing portion of the applicator.

【００２６】[0026]

【発明の効果】以上の説明で明らかなように、本発明の
端子圧着電線の端子圧着不良検出方法によれば、荷重セ
ンサが検出する物理的に異なる二以上の圧着ピーク波形
の一つを参照値として荷重センサの経時変化に伴う誤差
を補正するので、端子圧着時における圧着不良の検出に
関する判別等を行うことが可能である。また、検出部の
構成が簡単であり、異常の検出のための特別のスペース
を取る必要もない。更に、端子の種類や電線の種類毎に
異なるアプリケータに交換する場合にも検出部の交換が
不用であり、作業性の向上が図られる等の優れた効果が
ある。As is apparent from the above description, according to the terminal crimping defect detection method of the terminal crimping wire of the present invention, one of two or more physically different crimping peak waveforms detected by the load sensor is referred to. Since the error due to the change with time of the load sensor is corrected as the value, it is possible to make a determination regarding the detection of the crimping failure at the time of crimping the terminal. Moreover, the structure of the detection unit is simple, and it is not necessary to take a special space for detecting an abnormality. Furthermore, even when the applicator is replaced with a different applicator depending on the type of terminal or the type of electric wire, it is not necessary to replace the detection unit, and there is an excellent effect that workability is improved.

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

【図１】本発明に係る端子圧着電線の端子圧着不良検出
方法を適用した端子圧着装置の一実施例を示す一部切欠
正面図である。FIG. 1 is a partially cutaway front view showing an embodiment of a terminal crimping device to which a terminal crimping defect detection method for a terminal crimping electric wire according to the present invention is applied.

【図２】図１のラムの要部拡大図である。FIG. 2 is an enlarged view of a main part of the ram shown in FIG.

【図３】図２に示す荷重センサの接続態様を示す回路図
である。FIG. 3 is a circuit diagram showing a connection mode of the load sensor shown in FIG.

【図４】本発明を実施するためのパターン判定回路の一
実施例を示すブロック図である。FIG. 4 is a block diagram showing an embodiment of a pattern determination circuit for implementing the present invention.

【図５】端子圧着時における信号波形のパターンの一例
を示す波形図である。FIG. 5 is a waveform diagram showing an example of a signal waveform pattern during terminal crimping.

【図６】従来の端子圧着不良検出方法を説明するもの
で、端子が連続的に設けられたリードキャリアを示す正
面図である。FIG. 6 is a front view illustrating a conventional terminal crimping failure detection method and showing a lead carrier in which terminals are continuously provided.

【図７】図６のリードキャリアを右側面から見た側面図
である。7 is a side view of the lead carrier of FIG. 6 viewed from the right side.

【図８】電線の端末に端子を圧着した場合の各種の圧着
状態を示す概略図である。FIG. 8 is a schematic view showing various crimped states when the terminal is crimped to the end of the electric wire.

【符号の説明】[Explanation of symbols]

１ 端子圧着装置 ２ プレスフレーム ３ 端子圧着台 ４ アプリケータ ５ 型押部 ６ ラム ７ トグル装置 ８ 端子配給レバー １０ 荷重センサ １１、１２ 圧力センサ １３、１４、１５、１６ ロードセル ２０ パターン判定回路 Ｔ 端子 Ｗ 電線 1 terminal crimping device 2 press frame 3 terminal crimping table 4 applicator 5 die pusher 6 ram 7 toggle device 8 terminal distribution lever 10 load sensor 11, 12 pressure sensor 13, 14, 15, 16 load cell 20 pattern judgment circuit T terminal W Electrical wire

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 端子圧着電線から被覆を剥離して導体を
露出させ、導体を露出させた当該電線の端末に端子を圧
着する時の圧着力を荷重センサにより検出し、検出した
当該圧着力から前記端子の圧着状態の良否を判定する端
子圧着電線の端子圧着不良検出方法において、前記荷重
センサが検出する物理的に異なる二以上の圧着ピーク波
形の一つを参照値として前記荷重センサの経時変化に伴
う誤差を補正することを特徴とする端子圧着電線の端子
圧着不良検出方法。1. A crimping force at the time of crimping a terminal to the end of the electric wire in which the conductor is exposed by exposing the conductor by exposing the conductor from the crimped terminal crimping wire, and detecting the crimping force from the detected crimping force. In the terminal crimping failure detection method of the terminal crimping wire for judging the crimping state of the terminal, the temporal change of the load sensor with reference to one of two or more physically different crimping peak waveforms detected by the load sensor. A method for detecting a terminal crimping defect of a terminal crimping wire, which is characterized by correcting an error caused by the above.
JP3267618A 1991-10-16 1991-10-16 Method for detecting terminal crimp failure of terminal crimp electric wire Pending JPH05109460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3267618A JPH05109460A (en) 1991-10-16 1991-10-16 Method for detecting terminal crimp failure of terminal crimp electric wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3267618A JPH05109460A (en) 1991-10-16 1991-10-16 Method for detecting terminal crimp failure of terminal crimp electric wire

Publications (1)

Publication Number Publication Date
JPH05109460A true JPH05109460A (en) 1993-04-30

Family

ID=17447205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3267618A Pending JPH05109460A (en) 1991-10-16 1991-10-16 Method for detecting terminal crimp failure of terminal crimp electric wire

Country Status (1)

Country Link
JP (1) JPH05109460A (en)

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