JP4469157B2 - Terminal crimp failure detection device - Google Patents

Terminal crimp failure detection device Download PDF

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JP4469157B2
JP4469157B2 JP2003372231A JP2003372231A JP4469157B2 JP 4469157 B2 JP4469157 B2 JP 4469157B2 JP 2003372231 A JP2003372231 A JP 2003372231A JP 2003372231 A JP2003372231 A JP 2003372231A JP 4469157 B2 JP4469157 B2 JP 4469157B2
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tolerance
crimping
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pressure sensor
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JP2005135820A (en
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哲夫 佐藤
晴朝 松本
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TRUE SOLTEC CO.,LTD.
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Description

本発明は、被覆を剥離した絶縁被覆電線の端末に、端子圧着装置により端子を圧着する際に、端子の圧着状態を監視して圧着不良を自動的に検出するための端子圧着不良検出装置に関するものである。   The present invention relates to a terminal crimping defect detection device for automatically detecting a crimping failure by monitoring a crimping state of a terminal when crimping a terminal to a terminal of an insulation coated electric wire from which the coating has been peeled off by a terminal crimping device. Is.

端子圧着装置は、所定の長さに切断され、被覆が一定長だけ剥離された被覆電線の端末に、所定形状の端子を装着して圧縮することにより端子を自動的に取り付ける。すなわち、所定の長さに切断され、端部被覆が一定長だけ剥離された被覆電線と、所定形状の端子とを端子圧着装置に送り込み、電線の端部に端子を装着してベース板上のアンビルに載置する。その状態で、上からクリンパーをアンビル上の端子に押し付けることにより端子を所定の形状に圧縮する。そのような動作を連続的に繰り返して、多量の端子付き電線を自動的に製造する。   The terminal crimping apparatus automatically attaches a terminal by attaching a terminal having a predetermined shape to a terminal of a covered electric wire that has been cut to a predetermined length and the coating has been peeled off by a predetermined length. That is, a covered electric wire that has been cut to a predetermined length and the end covering is peeled by a fixed length and a terminal having a predetermined shape are fed into a terminal crimping device, and the terminal is mounted on the end of the electric wire on the base plate Place on the anvil. In this state, the terminal is compressed into a predetermined shape by pressing the crimper against the terminal on the anvil from above. Such an operation is continuously repeated to automatically manufacture a large amount of electric wires with terminals.

そのような端子圧着装置においては、端子圧着時に、電線導体の一部が端子からはみ出した状態で圧着されたり、導体に圧着されるべき部分が電線被覆の一部をも含めて圧着されたりというような圧着不良が発生することがあり、そのような圧着不良が発生したら、それを検知して排除する必要がある。そこで、圧力センサにより端子圧着時の異常を検出して圧着状態を識別し、圧着不良を検知する技術が開発された。   In such a terminal crimping device, at the time of terminal crimping, a part of the wire conductor is crimped in a state of protruding from the terminal, or a part to be crimped to the conductor is crimped including a part of the wire covering. Such a crimp failure may occur, and if such a crimp failure occurs, it must be detected and eliminated. Therefore, a technology has been developed that detects abnormalities during crimping of terminals using a pressure sensor, identifies the crimped state, and detects crimping defects.

それらの端子圧着不良検出装置は、圧力センサ出力の時間的変化を波形として捉え、波形のピーク値や総面積を基準波形のものと比較して圧着状態の良否を判定するようにしている。また、波形を時間軸に沿って複数の領域に分割し、各領域の面積を基準波形の対応領域の面積と比較することにより圧着状態の良否を判定するようにしたものもある。さらに、基準波形を上下方向に一定値だけシフトして得られる範囲を公差とし、測定波形が、波形全域に渡ってその公差範囲内にあるか否かで圧着状態の良否を判定するようにしたものもある。   These terminal crimping failure detection devices capture a temporal change in pressure sensor output as a waveform, and compare the peak value and total area of the waveform with those of a reference waveform to determine the quality of the crimped state. In addition, there is a method in which the waveform is divided into a plurality of regions along the time axis, and the quality of the crimped state is determined by comparing the area of each region with the area of the corresponding region of the reference waveform. Furthermore, the range obtained by shifting the reference waveform by a certain value in the vertical direction is set as the tolerance, and whether the crimped state is good or not is determined by whether the measured waveform is within the tolerance range over the entire waveform. There are also things.

なお、このような端子圧着不良検出装置に関連する従来の文献としては次のようなものがある。
佐藤哲夫著、「圧力センサを利用したハーネス品質管理の新手法」、メカトロニクス、技術調査会、１９９３年９月、Vol.１８、No.９、Ｐ５０−５３ The following documents are related to such a terminal crimping failure detection device.
Tetsuo Sato, “A New Method for Harness Quality Control Using Pressure Sensors”, Mechatronics, Technical Committee, September 1993, Vol. 18, No. 9, P50-53

しかしながら、波形のピーク値や総面積を基準波形のものと比較する方式の端子圧着不良検出装置には、検出精度が十分でなく誤検出や検出漏れが発生しやすいという問題点があった。   However, the terminal crimping failure detection device that compares the peak value and total area of the waveform with that of the reference waveform has a problem that detection accuracy is not sufficient and erroneous detection and detection omission are likely to occur.

また、各領域の面積を基準波形の対応領域の面積と比較する方式の端子圧着不良検出装置は、検出精度はある程度向上するが、アイテム毎に異なる圧力波形を適切に分割するのには高度の熟練を要し、現場の作業員では不可能であるという問題点があった。   In addition, the terminal crimping defect detection device that compares the area of each region with the area of the corresponding region of the reference waveform improves the detection accuracy to some extent, but it is difficult to properly divide the pressure waveform that is different for each item. There was a problem that it required skill and was impossible for workers on site.

本発明は、そのような問題点に鑑み、熟練技術を要する波形領域の区分け作業を不要としながら、精度を高く圧着不良を検出できるようにすることを目的とするものである。   The present invention has been made in view of such problems, and it is an object of the present invention to detect a crimping failure with high accuracy while eliminating the need to perform waveform region segmentation that requires skill.

前記課題を解決するため、請求項１に記載の端子圧着不良検出装置は、端子圧着時に端子圧着装置が発生する圧力を検出する圧力センサと、前記端子圧着装置で正常に圧着できた時の前記圧力センサの出力に基づいて所定時間間隔での圧力値を示す基準波形を生成して保存する基準波形生成手段と、前記端子圧着装置で正常に圧着できた時の前記圧力センサの出力に基づいて前記時間間隔毎の圧力値に対する、前記時間間隔毎の公差を生成して保存する公差生成手段と、前記圧力センサの出力波形と前記基準波形とを前記時間間隔毎に比較し、圧力センサの出力波形と基準波形との差が前記公差を超えているとき公差範囲外信号を出力する比較手段と、前記公差範囲外信号の出力割合が許容値を超えた時、端子圧着不良信号を出力する判定手段とを具えたことを特徴とする。 To solve the above problems, terminal crimping failure detecting apparatus according to claim 1, a pressure sensor for detecting a pressure terminal crimping terminal crimping device during occurs, the when successfully bonded at the terminal crimping device Based on a reference waveform generating means for generating and storing a reference waveform indicating a pressure value at a predetermined time interval based on the output of the pressure sensor, and on the output of the pressure sensor when the terminal crimping apparatus has successfully crimped Tolerance generating means for generating and storing a tolerance for each time interval with respect to a pressure value for each time interval, comparing the output waveform of the pressure sensor and the reference waveform for each time interval, and outputting the pressure sensor Comparing means for outputting a signal outside the tolerance range when the difference between the waveform and the reference waveform exceeds the tolerance, and a determination for outputting a terminal crimping failure signal when the output ratio of the signal outside the tolerance range exceeds an allowable value hand And characterized in that it comprises a door.

また、請求項２に記載の端子圧着不良検出装置の公差生成手段は、圧着不良時の圧力センサの出力をも取り込み、正常に圧着できた時のデータ分布と圧着不良時のデータ分布とが重なる部分での公差を小さくし、両データ分布の重なりがない部分の公差を大きくすることを特徴とする。 Further, the tolerance generating means of the terminal crimping defect detecting device according to claim 2 also takes in the output of the pressure sensor at the time of the crimping failure, and the data distribution at the time of successful crimping and the data distribution at the time of the crimping failure overlap. It is characterized in that the tolerance in the part is reduced and the tolerance in the part where both data distributions do not overlap is increased .

また、請求項３に記載の端子圧着不良検出装置の判定手段は、出力波形の部分毎に重み付けして公差範囲外信号の出力割合を算出することを特徴とする。 According to a third aspect of the present invention, the determination means of the terminal crimping defect detecting device calculates the output ratio of the out-of-tolerance signal by weighting each portion of the output waveform.

本発明の端子圧着不良検出装置は、次のような効果を奏する。
すなわち、請求項１に記載の端子圧着不良検出装置は、端子圧着時に端子圧着装置が発生する圧力を圧力センサで検出し、端子圧着装置で正常に圧着できた時の圧力センサの出力に基づいて所定時間間隔での圧力値を示す基準波形と圧力値の公差とを生成して保存し、検査時には、圧力センサの出力波形と基準波形とを前記時間間隔毎に比較し、圧力センサの出力波形と基準波形との差が前記公差を超えているとき公差範囲外信号を出力し、公差範囲外信号の出力割合が許容値を超えた時、端子圧着不良信号を出力するようにした。その結果、熟練技術を要する波形領域の区分け作業を不要としながら、高精度で圧着不良を検出できるようになる。
The terminal crimping failure detecting device of the present invention has the following effects.
That is, the terminal crimping failure detecting apparatus according to claim 1, a pressure terminal crimping apparatus occurs during crimping is detected by the pressure sensor, based on the output of the pressure sensor when successfully bonded at the terminal crimping device A reference waveform indicating a pressure value at a predetermined time interval and a tolerance of the pressure value are generated and stored, and at the time of inspection, the output waveform of the pressure sensor and the reference waveform are compared at each time interval to output the pressure sensor output waveform. When the difference between the reference waveform and the reference waveform exceeds the tolerance, a signal outside the tolerance range is output, and when the output ratio of the signal outside the tolerance range exceeds an allowable value, a terminal crimping failure signal is output. As a result, it becomes possible to detect a crimping failure with high accuracy while eliminating the need to perform waveform region segmentation that requires skill.

請求項２に記載の端子圧着不良検出装置は、正常に圧着できた時のデータ分布と圧着不良時のデータ分布とが重なる部分での公差を小さくし、両データ分布とが重なりがない部分の公差を大きくするようにしたので、圧着不良を最大限検出しながら、正常圧着したものを圧着不良と検出してしまうという誤検出を減らすことができる。 The terminal crimping failure detection device according to claim 2 reduces a tolerance at a portion where a data distribution when the crimping is normally performed and a data distribution at the time of the crimping failure overlap, and a portion where the two data distributions do not overlap. Since the tolerance is increased, it is possible to reduce erroneous detection of detecting a normally-crimped product as a crimping failure while detecting a crimping failure as much as possible.

請求項３に記載の端子圧着不良検出装置は、前記判定手段が、出力波形の部分毎に重み付けして公差範囲外信号の出力割合を算出するようにしたので、さらに高い精度で圧着不良を検出できるようになる。 In the terminal crimping defect detection device according to claim 3 , since the determination unit weights each part of the output waveform and calculates the output ratio of the signal outside the tolerance range, the crimping defect is detected with higher accuracy. become able to.

以下、本発明の実施例を図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、端子圧着装置に圧力センサを設けた状態を示す図である。図１において、１はベース板、２，２はアプリケータ、３，３はクリンパー、４はアンビル、５は被覆電線、６は電線導体、７は端子、８はワイヤバレル、９はインシュレーションバレル、１０は圧力センサ、１１はリード線である。   FIG. 1 is a view showing a state in which a pressure sensor is provided in a terminal crimping apparatus. In FIG. 1, 1 is a base plate, 2 and 2 are applicators, 3 and 3 are crimpers, 4 is an anvil, 5 is a covered wire, 6 is a wire conductor, 7 is a terminal, 8 is a wire barrel, and 9 is an insulation barrel. 10 is a pressure sensor and 11 is a lead wire.

端子圧着装置では、所定の長さに切断され、端部被覆が一定長だけ剥離して電線導体６が露出された被覆電線５と、ワイヤバレル８とインシュレーションバレル９とを有する端子７とを送り込み、電線の端部に端子を装着してアンビル４の上に載置する。その状態で、上方のアプリケータ２を押し下げて、該アプリケータの下端に設けたクリンパー３，３を、それぞれ、端子７のワイヤバレル８とインシュレーションバレル９に押し付けることによりそれらを所定の形状に圧縮する。   In the terminal crimping apparatus, a covered electric wire 5 which is cut to a predetermined length, the end covering is peeled by a predetermined length and the electric wire conductor 6 is exposed, and a terminal 7 having a wire barrel 8 and an insulation barrel 9 are provided. The terminal is attached to the end of the electric wire and placed on the anvil 4. In this state, the upper applicator 2 is pushed down, and the crimpers 3 and 3 provided at the lower end of the applicator are pressed against the wire barrel 8 and the insulation barrel 9 of the terminal 7, respectively, so that they have a predetermined shape. Compress.

その結果、クリンパー３，３とアンビル４とにより、端子７のワイヤバレル８が電線導体６を包み込むように圧縮され、インシュレーションバレル９が、被覆電線５の絶縁被覆の端部を包み込むように圧縮されて、被覆電線５に端子７が強固に接続固定される。端子圧着装置は、そのような動作を連続的に繰り返して、端子付き電線を自動的に製造する。   As a result, the crimper 3, 3 and the anvil 4 compress the wire barrel 8 of the terminal 7 so as to wrap the wire conductor 6, and the insulation barrel 9 compresses so as to wrap the end of the insulation coating of the covered wire 5. Thus, the terminal 7 is firmly connected and fixed to the covered electric wire 5. The terminal crimping device continuously repeats such an operation to automatically manufacture a terminal-attached electric wire.

そのような端子圧着装置のベース板１の下側に圧力センサ１０を設け、それからリード線１１を引き出している。圧力センサ１０としては、例えば、図２に示すような形状をしたピエゾセンサを用いることができる。ピエゾセンサは、圧電効果により、圧力に比例した電圧を出力する。本発明の端子圧着不良検出装置では、端子圧着時に、クリンパー３，３から、被覆電線５，端子７，アンビル４，ベース板１を介して圧力センサ１０に圧力を受ける。その圧力により発生する、圧力センサ１０の出力をデジタル処理して、予め記憶された正常時の基準波形と、検査時に出力された圧力波形とを比較することにより、良品か不良品かを判別し、不良品を確実に排除する。なお、圧力センサ１０の設置場所は、必ずしもベース板１の下側には限定されず、端子圧着時に圧着状態に応じた圧力が発生する箇所であれば、その他の場所にしてもよい。   The pressure sensor 10 is provided on the lower side of the base plate 1 of such a terminal crimping apparatus, and the lead wire 11 is drawn out therefrom. As the pressure sensor 10, for example, a piezo sensor having a shape as shown in FIG. 2 can be used. The piezo sensor outputs a voltage proportional to the pressure due to the piezoelectric effect. In the terminal crimping failure detection device of the present invention, pressure is applied to the pressure sensor 10 from the crimpers 3 and 3 via the covered electric wire 5, the terminal 7, the anvil 4, and the base plate 1 when the terminal is crimped. The output of the pressure sensor 10 generated by the pressure is digitally processed, and a normal reference waveform stored in advance is compared with a pressure waveform output at the time of inspection to determine whether the product is good or defective. , To reliably eliminate defective products. In addition, the installation place of the pressure sensor 10 is not necessarily limited to the lower side of the base plate 1, and may be another place as long as the pressure according to the crimping state is generated when the terminal is crimped.

図３は、本発明の一実施例のブロック図である。圧力センサ１０の出力をＡ−Ｄ変換器１２でデジタル信号に変換し、ＣＰＵ１３に入力する。ＣＰＵ１３は、ＲＯＭ１４に格納されているプログラムによって動作し、ＲＡＭ１５に必要なデータを読み書きしながら処理を実行する。Ａ−Ｄ変換器１２から受けたデータは、ソフト的に構成されたノイズフィルタ１８を通してから処理される。   FIG. 3 is a block diagram of one embodiment of the present invention. The output of the pressure sensor 10 is converted into a digital signal by the A / D converter 12 and input to the CPU 13. The CPU 13 operates according to a program stored in the ROM 14 and executes processing while reading and writing necessary data in the RAM 15. Data received from the A-D converter 12 is processed after passing through a noise filter 18 configured in a software manner.

圧着不良検出を行う前に、まず、基準波形を得るために、正常に圧着した時の圧力センサ１０の出力を所定時間間隔でサンプリングして、必要本数分の波形データとして読み込ませる。基準波形生成部１９は、読み込ませた本数分の波形データを前記所定時間間隔毎に平均して、図４に波形Ａで示すような基準波形を得て、ＲＡＭ１５の所定のエリアに格納する。その、基準波形は、表示制御部２４により表示装置１６に表示される。それと同時に、公差生成部２０は、サンプリングしたデータから前記所定時間間隔毎に標準偏差σを算出し、基準波形を挟んで−３σ〜＋３σを公差として設定する。なお、−３σ〜＋３σの範囲は、正規分布をとるデータの約９９．７％が入る範囲であり、エラーチェックをする際の公差設定に良く用いられる値であるが、本発明で用いる公差としては、必ずしもそれに限定されず、その他の数式で算出した値を用いることも可能である。   Before performing the crimping failure detection, first, in order to obtain a reference waveform, the output of the pressure sensor 10 when the crimping is normally performed is sampled at a predetermined time interval and read as necessary waveform data. The reference waveform generation unit 19 averages the read waveform data for each predetermined time interval to obtain a reference waveform as shown by a waveform A in FIG. 4 and stores it in a predetermined area of the RAM 15. The reference waveform is displayed on the display device 16 by the display control unit 24. At the same time, the tolerance generator 20 calculates the standard deviation σ at the predetermined time intervals from the sampled data, and sets -3σ to + 3σ as tolerances with the reference waveform interposed therebetween. Note that the range of -3σ to + 3σ is a range in which about 99.7% of data having a normal distribution is included, and is a value often used for setting a tolerance when performing an error check. Is not necessarily limited thereto, and values calculated by other mathematical expressions can also be used.

そして、検査段階に入ると、端子圧着装置での各回の圧着毎に、データ取得部２１は、Ａ−Ｄ変換器１２，ノイズフィルタ１８を介して、圧力センサ１０から圧力データを取得し、検出波形としてＲＡＭ１５の所定のエリアに格納する。その、検出波形は、表示制御部２４により表示装置１６に、図４に波形Ｂで示すよう、基準波形に重ねられた形で表示される。比較部２２は、ＲＡＭ１５に格納された検出波形と前記基準波形とを前記時間間隔毎に比較し、圧力センサの検出波形と基準波形との差が前記公差を超えているとき公差範囲外信号を出力する。   When entering the inspection stage, the data acquisition unit 21 acquires pressure data from the pressure sensor 10 via the A-D converter 12 and the noise filter 18 for each crimping by the terminal crimping device, and detects it. The waveform is stored in a predetermined area of the RAM 15. The detected waveform is displayed on the display device 16 by the display control unit 24 in a form superimposed on the reference waveform as shown by the waveform B in FIG. The comparison unit 22 compares the detection waveform stored in the RAM 15 with the reference waveform at each time interval, and outputs a signal outside the tolerance range when the difference between the detection waveform of the pressure sensor and the reference waveform exceeds the tolerance. Output.

図５は、検出波形と基準波形との比較処理の説明図である。波形Ａは、基準波形の一部を示し、波形Ｂは、検出波形の一部を示している。Ｔｎ，Ｔｎ＋１，Ｔｎ＋２，・・・は、圧力センサ１０の出力をサンプリングした時間間隔を示しており、＋３σｎ，＋３σｎ＋１，＋３σｎ＋２，・・・は、それぞれの時間間隔毎の公差上限値を示し、−３σｎ，−３σｎ＋１，−３σｎ＋２，・・・は、公差下限値を示している。そして、比較部２２は、圧力センサの検出波形Ｂが公差上限値と公差下限値の間から外れた時、公差範囲外信号を出力する。判定部２３は、全サンプリング数に対する公差範囲外信号の出力割合が許容値を超えた時、出力部１７を介して端子圧着不良信号を出力する。 FIG. 5 is an explanatory diagram of a comparison process between the detected waveform and the reference waveform. Waveform A shows a part of the reference waveform, and waveform B shows a part of the detected waveform. T n , T n + 1 , T n + 2 ,... Indicate the time intervals at which the output of the pressure sensor 10 is sampled, and + 3σ n , + 3σ n + 1 , + 3σ n + 2 ,. The upper limit value is indicated, and −3σ n , −3σ n + 1 , −3σ n + 2 ,... Indicate the tolerance lower limit value. Then, the comparison unit 22 outputs a signal outside the tolerance range when the detection waveform B of the pressure sensor deviates from between the tolerance upper limit value and the tolerance lower limit value. The determination unit 23 outputs a terminal crimping failure signal via the output unit 17 when the output ratio of the signal outside the tolerance range with respect to the total number of samplings exceeds the allowable value.

ところで、圧力センサ１０の検出波形は、端子圧着不良の種類によって特徴的な波形を示し、特徴が現れる部位に偏りがある。そこで、公差生成時に、圧着不良時の圧力センサ１０の出力波形をも取り込んで、その特徴部分を公差生成の一要素にすれば、より精度の高い端子圧着不良の検出が可能になる。例えば、正常圧着時のデータ分布と圧着不良時のデータ分布に重なる部分がある場合は、その部分での公差を狭めにし、両者のデータ分布に重なりがない場合は、その部分での公差を広めにする。そのようにすれば、圧着不良を最大限検出しながら、正常圧着したものを圧着不良と検出してしまうという誤検出を減らすことができる。   By the way, the detection waveform of the pressure sensor 10 shows a characteristic waveform depending on the type of terminal crimping failure, and the portion where the feature appears is biased. Thus, when the tolerance is generated, the output waveform of the pressure sensor 10 at the time of the crimping failure is also taken in and the characteristic portion is made one element of the tolerance generation, so that the terminal crimping failure can be detected with higher accuracy. For example, if there is a portion that overlaps the data distribution at normal crimping and the data distribution at the time of poor crimping, narrow the tolerance at that portion, and if both data distributions do not overlap, widen the tolerance at that portion. To. By doing so, it is possible to reduce erroneous detection of detecting a normally-crimped product as a poorly crimped one while detecting a crimping failure as much as possible.

また、出力波形の部分毎に、重み付けして、公差範囲外信号の出力割合を算出するようにすれば、さらに精度の高い端子圧着不良の検出が可能になる。重み付けを行う方法としては、例えば、経験則に基づいて、図６に示すような、センサ出力ＶＭ の大きさと標準偏差σＮ の大きさとに基づいて重み係数ＷＭＮを設定したテーブルを作成し、ＲＯＭ１４に格納しておく。そして、判定部２３は、そのテーブルを参照して公差範囲外信号の出力割合を算出し、端子圧着不良の判定を行うようにすればよい。なお、重み付けは、必ずしもテーブルを用いる必要はなく、センサ出力Ｖと標準偏差σとを変数とする適当な関数Ｆ（Ｖ，σ）を用いて重み係数Ｗを求めるようにしてもよい。 Moreover, if the output ratio of signals outside the tolerance range is calculated for each portion of the output waveform and weighted, it is possible to detect a terminal crimping failure with higher accuracy. As a method for weighting, for example, based on the empirical rule, as shown in FIG. 6, the sensor output V M size and the standard deviation sigma N a table set the weight coefficient W MN based on the size Created and stored in ROM 14. And the determination part 23 should just calculate the output ratio of a signal outside a tolerance range with reference to the table, and may determine a terminal crimping defect. It is not always necessary to use a table for weighting, and the weighting factor W may be obtained using an appropriate function F (V, σ) having the sensor output V and the standard deviation σ as variables.

端子圧着装置に圧力センサを設けた状態を示す図である。It is a figure which shows the state which provided the pressure sensor in the terminal crimping apparatus. 圧力センサの外観図である。It is an external view of a pressure sensor. 本発明の一実施例のブロック図である。It is a block diagram of one Example of this invention. 圧力波形の一例を示す図である。It is a figure which shows an example of a pressure waveform. 検出波形と基準波形との比較処理の説明図である。It is explanatory drawing of the comparison process of a detection waveform and a reference waveform. エラー出力の割合に重み付けをするためのテーブルの一例である。It is an example of the table for weighting the ratio of an error output.

符号の説明Explanation of symbols

１…ベース板
２…アプリケータ
３…クリンパー
４…アンビル
５…被覆電線
６…電線導体
７…端子
８…ワイヤバレル
９…インシュレーションバレル
１０…圧力センサ
１１…リード線 DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Applicator 3 ... Crimper 4 ... Anvil 5 ... Covered electric wire 6 ... Electric wire conductor 7 ... Terminal 8 ... Wire barrel 9 ... Insulation barrel 10 ... Pressure sensor 11 ... Lead wire

Claims (3)

端子圧着時に端子圧着装置が発生する圧力を検出する圧力センサと、
前記端子圧着装置で正常に圧着できた時の前記圧力センサの出力に基づいて所定時間間隔での圧力値を示す基準波形を生成して保存する基準波形生成手段と、
前記端子圧着装置で正常に圧着できた時の前記圧力センサの出力に基づいて前記時間間隔毎の圧力値に対する、前記時間間隔毎の公差を生成して保存する公差生成手段と、
前記圧力センサの出力波形と前記基準波形とを前記時間間隔毎に比較し、圧力センサの出力波形と基準波形との差が前記公差を超えているとき公差範囲外信号を出力する比較手段と、
前記公差範囲外信号の出力割合が許容値を超えた時、端子圧着不良信号を出力する判定手段
とを具えたことを特徴とする端子圧着不良検出装置。 A pressure sensor for detecting a pressure terminal crimping device during crimping occurs,
A reference waveform generating means for generating and storing a reference waveform indicating a pressure value at a predetermined time interval based on an output of the pressure sensor when the terminal crimping apparatus is normally crimped;
Tolerance generating means for generating and storing a tolerance for each time interval with respect to a pressure value for each time interval based on an output of the pressure sensor when the terminal crimping device has been normally crimped;
Comparing means for comparing the output waveform of the pressure sensor and the reference waveform at each time interval, and outputting a signal outside the tolerance range when the difference between the output waveform of the pressure sensor and the reference waveform exceeds the tolerance;
A terminal crimping defect detection device comprising: a determination unit that outputs a terminal crimping defect signal when an output ratio of the out-of-tolerance signal exceeds an allowable value. 前記公差生成手段は、圧着不良時の圧力センサの出力をも取り込み、正常に圧着できた時のデータ分布と圧着不良時のデータ分布とが重なる部分での公差を小さくし、両データ分布の重なりがない部分の公差を大きくすることを特徴とする請求項１に記載の端子圧着不良検出装置。 The tolerance generation means also captures the output of the pressure sensor at the time of defective crimping, reduces the tolerance at the portion where the data distribution when the crimping is successful and the data distribution at the time of defective crimping overlap, and overlaps both data distributions The terminal crimping defect detecting device according to claim 1, wherein a tolerance of a portion where there is no gap is increased. 前記判定手段は、前記出力波形の部分毎に重み付けして公差範囲外信号の出力割合を算出することを特徴とする請求項１又は２に記載の端子圧着不良検出装置。 3. The terminal crimping defect detection device according to claim 1, wherein the determination unit calculates an output ratio of a signal outside the tolerance range by weighting each portion of the output waveform.
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