JP2003031414A - Wire discontinuity detector circuit for electromagnetic chuck - Google Patents
Wire discontinuity detector circuit for electromagnetic chuckInfo
- Publication number
- JP2003031414A JP2003031414A JP2001218891A JP2001218891A JP2003031414A JP 2003031414 A JP2003031414 A JP 2003031414A JP 2001218891 A JP2001218891 A JP 2001218891A JP 2001218891 A JP2001218891 A JP 2001218891A JP 2003031414 A JP2003031414 A JP 2003031414A
- Authority
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- Prior art keywords
- circuit
- electromagnetic chuck
- voltage
- capacitor
- disconnection
- 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.)
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- Jigs For Machine Tools (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、平面研削装置を用
いて金属製ワ−クを加工する際に使用される電磁チャッ
クの断線の有無を検出する回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for detecting the presence or absence of disconnection of an electromagnetic chuck used when processing a metal work using a surface grinding machine.
【０００２】[0002]
【従来の技術】水平方向に往復移動可能なテ−ブル上に
載置されたワ−クと、上下方向に昇降可能な砥石頭に備
えられた回転砥石を相対移動させてワ−クを研削加工す
る平面研削装置は知られており（特開平１−９７５３７
号、同５−７７１６４号、同６−２２６６２３号、同６
−２２６５９４号、同１１−２６２８３２号、特開２０
００−２６３４３６号）、実用化されている。2. Description of the Related Art A work mounted on a table capable of reciprocating in a horizontal direction and a rotary grindstone mounted on a grindstone head capable of moving up and down are relatively moved to grind the work. A surface grinding machine for processing is known (Japanese Patent Laid-Open No. 1-97537).
No. 5, No. 5-77164, No. 6-226623, No. 6
No. 226594, No. 11-262832, JP 20
00-263436), which has been put to practical use.
【０００３】図５および図６に示す平面研削装置１にお
いて、２はワ−ク、３は砥石、４は水平方向（Ｘ軸方
向）に往復移動可能なテ−ブル、５は作業台部、６は電
磁チャック、７は前後方向（Ｚ軸方向）に往復移動可能
なサドル、８は操作盤、８ａは砥石の切り込み開始点位
置検出Ｏｎ−Ｏｆｆスィッチ、８ｂは砥石上下切り込み
手動パルス発生器ボタン、９はコラム、１０は砥石軸、
１１は砥石頭、１２は砥石３を垂直方向（Ｙ軸方向）に
移動する昇降手段、１３はモ−タ−、１４は螺合体、１
５はネジ軸、１６は軸受、１７は安全保護カバ−、３１
６は制御装置（ＣＰＵ）、３０は研削液供給ノズルであ
る。In the surface grinding apparatus 1 shown in FIGS. 5 and 6, 2 is a work, 3 is a grindstone, 4 is a table capable of reciprocating in the horizontal direction (X-axis direction), 5 is a workbench, 6 is an electromagnetic chuck, 7 is a saddle that can reciprocate in the front-rear direction (Z-axis direction), 8 is a control panel, 8a is an on-off switch for detecting the starting position of the cutting edge of the grinding wheel, and 8b is a manual pulse generator button for cutting the grinding wheel up and down , 9 is a column, 10 is a grindstone shaft,
Reference numeral 11 is a grindstone head, 12 is an elevating means for moving the grindstone 3 in the vertical direction (Y-axis direction), 13 is a motor, and 14 is a screw body.
5 is a screw shaft, 16 is a bearing, 17 is a safety protection cover, 31
Reference numeral 6 is a control device (CPU), and 30 is a grinding fluid supply nozzle.
【０００４】左右方向に往復移動しているテ−ブル４上
のワ−ク２に回転している砥石３を下降してワ−クに切
り込みをかけ、テ−ブルと砥石を相対移動させて研削は
行われる。この際、ワ−クと砥石が接触する加工点には
ノズル３０より研削液が供給される。By rotating the grindstone 3 on the work 2 on the table 4 which is reciprocating in the left-right direction, the rotating grindstone 3 is lowered to cut the work, and the table and the grindstone are moved relative to each other. Grinding is performed. At this time, the grinding liquid is supplied from the nozzle 30 to the processing point where the work and the grindstone come into contact with each other.
【０００５】テ−ブル４の左右移動は、前述の特許文献
に記載されるように油圧駆動、ボ−ルネジ駆動、リニア
モ−タ駆動、ベルト駆動等が利用されている。また、テ
−ブル反転機構は、テ−ブルの左右両側に固定して設け
たドッグと、これらドッグの間隔より狭い間隔を以って
ベッドに固定して設けられたリミットスイッチを用いて
いる。As the lateral movement of the table 4, hydraulic drive, ball screw drive, linear motor drive, belt drive, etc. are utilized as described in the above-mentioned patent documents. Further, the table reversing mechanism uses dogs fixedly provided on both left and right sides of the table and limit switches fixedly fixed to the bed at intervals smaller than the intervals of these dogs.
【０００６】図７に、テ−ブルが油圧駆動で、テ−ブル
反転機構としてドッグとリミットスイッチを用いた研削
装置を示す。図７に示す研削装置１において、３は砥
石、４は水平方向（Ｘ軸方向）に往復移動可能なテ−ブ
ル、９はコラム、３１６は制御装置（ＣＰＵ）で、プロ
グラムが書き込まれた記憶部ＲＯＭと記録部ＲＡＭを持
つ。２０はベッド、２１，２１はドッグ、２２，２２は
リミットスイッチ、２３は油圧駆動部、２４はステップ
モ−タ、２５は油圧回路、２６はテ−ブル速度調節絞り
弁、２７は入力ポ−ト、２８は出力ポ−ト、２９はモ−
タ駆動回路である。FIG. 7 shows a grinding device in which a table is hydraulically driven and a dog and a limit switch are used as a table reversing mechanism. In the grinding apparatus 1 shown in FIG. 7, 3 is a grindstone, 4 is a table capable of reciprocating in the horizontal direction (X-axis direction), 9 is a column, and 316 is a control unit (CPU), in which a program is stored. It has a partial ROM and a recording RAM. 20 is a bed, 21 and 21 are dogs, 22 and 22 are limit switches, 23 is a hydraulic drive unit, 24 is a step motor, 25 is a hydraulic circuit, 26 is a table speed adjusting throttle valve, and 27 is an input port. , 28 is an output port, and 29 is a mode.
Drive circuit.
【０００７】油圧駆動部２３が油圧回路２５に駆動され
てテ−ブル４を左右方向に移動させる。この左右反転動
作にドッグ２１，２１がリミットスイッチ２２，２２を
動作させる。テ−ブルが左端に到達すると、右方のリミ
ットスイッチ２２が右方のドッグ２１に対向してｏｎと
なる状態で右方のリミットスイッチ２２の信号は反転検
出信号として制御装置３１６に入力され、これにより油
圧回路２５の方向切り替え弁（図示されていない）が動
作されて油圧駆動部２３の動作方向、すなわちテ−ブル
４の動作方向が変えられ（反転）、テ−ブルが右方向に
移動し始め、右方のドッグ２１が右方のリミットスイッ
チ２２より離れる。The hydraulic drive unit 23 is driven by the hydraulic circuit 25 to move the table 4 left and right. The dogs 21 and 21 operate the limit switches 22 and 22 for this left-right reversal operation. When the table reaches the left end, the signal of the right limit switch 22 is input to the control device 316 as an inversion detection signal with the right limit switch 22 facing the right dog 21 and turned on. As a result, the direction switching valve (not shown) of the hydraulic circuit 25 is operated to change the operating direction of the hydraulic drive unit 23, that is, the operating direction of the table 4 (reverse), and the table moves to the right. Then, the dog 21 on the right separates from the limit switch 22 on the right.
【０００８】そして、テ−ブルが右端に到達すると、左
方のリミットスイッチ２２が左方のドッグ２１に対向し
てｏｎとなる状態で左方のリミットスイッチ２２の信号
は反転検出信号として制御装置３１６に入力され、これ
により油圧回路２５の方向切り替え弁（図示されていな
い）が動作されて油圧駆動部２３の動作方向、すなわち
テ−ブル４の動作方向が変えられ（反転）、テ−ブルが
左方向に移動し始め、左方のドッグ２１が左方のリミッ
トスイッチ２２より離れる。このような動作は、交互に
連続して行われる。When the table reaches the right end, the left limit switch 22 faces the left dog 21 and turns on, and the signal from the left limit switch 22 is an inversion detection signal. 316, which operates a direction switching valve (not shown) of the hydraulic circuit 25 to change the operating direction of the hydraulic drive unit 23, that is, the operating direction of the table 4 (reversal), and the table. Starts moving to the left, and the dog 21 on the left moves away from the limit switch 22 on the left. Such operations are alternately and continuously performed.
【０００９】ワ−ク２が金属であるときのチャックとし
ては、電磁（マグネット）チャック６（ＪＩＳ Ｂ−６
１５６−１９７８）が用いられる。電磁チャックは、磁
極用鋼材に巻いたコイルに電流を通して磁石とし、電流
を切って磁力をなくす原理を応用したもので、図４ａに
示すように多数の電磁石Ｅ，Ｅ，Ｅ，ＥをＳ極とＮ極が
交互となるように並べてその間を非磁性体Ｚ，Ｚ，Ｚで
囲んだ角テ−ブル型チャック（臼井 英治著「切削・研
削加工学 下巻」１２０−１２１頁：昭和５８年９月５
日共立出版刊 ５版）や、図４ｂに示すように鋳鉄の底
箱体６ａ内に磁極用鋼材に巻いたコイルＣ，Ｃを並べ、
この底箱体６ａの上部をＵ状の絶縁セパレ−タＺ，Ｚ，
Ｚで分離、絶縁された磁極材Ｅ，Ｅ，Ｅが電磁石のＳ
極、Ｎ極にそれぞれ接触して各磁極を形成している上蓋
６ｂで覆った構造のもの（高木 義雄編集「技能ブック
ス（８）／研削盤のエキスパ−ト」 １００−１０１
頁：平成４年４月１０日 株式会社大河出版 第１２
版）などが使用されている。When the work 2 is made of metal, an electromagnetic (magnet) chuck 6 (JIS B-6) is used.
156-1978) is used. The electromagnetic chuck applies the principle of passing a current through a coil wound around steel for magnetic poles and cutting off the current to eliminate the magnetic force. As shown in FIG. 4a, a large number of electromagnets E, E, E, E are S poles. Square table chuck with N and N poles arranged alternately and surrounded by non-magnetic material Z, Z, Z (Eiji Usui "Cutting and Grinding Science, 2nd Volume", pp. 120-121: 1983) Month 5
5th edition), or as shown in FIG. 4b, the coils C, C wound around steel for magnetic poles are arranged in the bottom box body 6a of cast iron.
The upper part of the bottom box body 6a is provided with a U-shaped insulating separator Z, Z,
Magnetic pole materials E, E, E separated and insulated by Z are S of electromagnets.
Structure covered with an upper lid 6b that contacts the pole and the N pole to form each magnetic pole (edited by Yoshio Takagi, "Skill Books (8) / Expert for Grinders" 100-101)
Page: April 10, 1992 Taiga Publishing Co., Ltd. No. 12
Version) is used.
【００１０】これら電磁チャック６はステンレス製テ−
ブル４上に設けられた取り付け台６ａに固定されて使用
される。また、電磁チャック６の電磁石は直流で使用さ
れるので、通常、金属工作機械は交流を直流とする整流
器を備えている。These electromagnetic chucks 6 are made of stainless steel.
It is used by being fixed to a mounting base 6a provided on the bull 4. Further, since the electromagnet of the electromagnetic chuck 6 is used in direct current, the metal machine tool is usually equipped with a rectifier for converting alternating current into direct current.
【００１１】[0011]
【発明が解決しようとする課題】ワ−クの研削加工中に
電磁チャック６に断線が生じると、ワ−クは左右方向
（Ｘ軸方向）に反転移動しているテ−ブル４より放り出
され、研削を続行することができなくなる、あるいは、
電磁チャック上をワ−クが移動して予定していない箇所
を研削することが生じる。よって、ワ−クに傷が付かな
いようにするには、加工中に電磁チャックの断線の有無
を確認し、断線が検出されたら制御ユニット部３１６よ
りサ−ボモ−タ１３に駆動停止または逆回転を指示して
砥石軸１１を上昇させ、および制御ユニット部３１６よ
りステップモ−タ２４にテ−ブル４反転の中止の指示が
なされるのが好ましい。When the electromagnetic chuck 6 is broken during the grinding process of the work, the work is thrown out from the table 4 which is reversingly moved in the left-right direction (X-axis direction). , Can no longer continue grinding, or
The work may move on the electromagnetic chuck to grind an unplanned portion. Therefore, in order to prevent the work from being scratched, it is necessary to confirm the presence or absence of disconnection of the electromagnetic chuck during processing. If disconnection is detected, the control unit 316 stops driving the servomotor 13 or reverses it. It is preferable that the grindstone shaft 11 is raised by instructing the rotation, and the control unit section 316 instructs the step motor 24 to stop the reversal of the table 4.
【００１２】また、研削加工開始前に、電磁チャック６
が断線していないか検出できることが好ましい。本発明
は、電磁チャックの断線の有無を検出する検出回路を提
供するものである。Before starting the grinding process, the electromagnetic chuck 6
It is preferable to be able to detect whether or not the wire is broken. The present invention provides a detection circuit for detecting the presence or absence of disconnection of an electromagnetic chuck.
【００１３】[0013]
【課題を解決するための手段】請求項１の発明は、交流
電源、交流電源の電源入力端子Ｔ１，電源出力端子
Ｔ ２，および出力端子Ｔ３，Ｔ４を有するブリッジ回路
の前記両出力端子Ｔ３，Ｔ ４に受電点を結んだ電磁チャ
ック回路の結線部に介設した端子Ｔ５，Ｔ６に、抵抗Ｒ
１とコンデンサＣ１の平滑回路を介設した整流器回路
に、前記平滑回路の抵抗Ｒ１とコンデンサＣ１間に介設
した端子Ｔ７よりツエナ−ダイオ−ドＺＤと定電流ダイ
オ−ドＤおよび検出センサを直列して、かつ、前記コン
デンサＣ１に対して並列に設けた断線検出回路であっ
て、ツエナ−ダイオ−ドＺＤの電圧ＶＺＤを、電磁チャ
ックの断線がないときの正常な電圧ＶＯよりは大きく、
電磁チャックに断線が生じた際の電圧Ｖｂより小さく設
定したことを特徴とする、電磁チャックの断線検出回路
を提供するものである。The invention of claim 1 is an alternating current
Power supply, AC power supply input terminal T1， Power output terminal
T Two, And output terminal TThree, TFourBridge circuit with
Both output terminals T ofThree, T FourAn electromagnetic charger that connects the power receiving point to
Terminal T provided in the connection part of the check circuit5, T6And the resistance R
1And capacitor C1Rectifier circuit with a smoothing circuit
And the resistance R of the smoothing circuit1And capacitor C1Intervening
Terminal T7More Zener diode ZD and constant current die
The mode D and the detection sensor are connected in series, and
Densa C1Is a disconnection detection circuit provided in parallel with
Then, the voltage V of the Zener diode ZDZDThe electromagnetic
Voltage V when there is no disconnectionOGreater than
Voltage V when disconnection occurs in the electromagnetic chuckbSmaller installation
Detection circuit for electromagnetic chuck disconnection
Is provided.
【００１４】電磁チャックに断線が生じると、ＲＣ平滑
回路の電圧Ｖｂは、断線のない正常時の電圧ＶＯより大
きい値を示す。よって、ツエナ−ダイオ−ドＺＤの電圧
ＶＺ Ｄを、電磁チャックの断線がないときの正常な電圧
ＶＯよりは大きく、電磁チャックに断線が生じた際の電
圧Ｖｂより小さく設定することにより、断線時は検出回
路に電圧を一定（電圧ＶＺＤ）とするように電流が流
れ、後の回路、例えばパソコンの制御ユニット部の回路
に断線を報せる。なお、定電流ダイオ−ドＤで後の回路
に流れる電流を制限してパソコンを保護する。電磁チャ
ックの断線がない正常な運転がなされているときは、ツ
エナ−ダイオ−ドＺＤに電流は流れないので、研削装置
の運転は続行される。When disconnection occurs in the electromagnetic chuck, the voltage Vb of the RC smoothing circuit shows a value larger than the voltage V O in the normal state without disconnection. Therefore, the Zener - diode - the voltage V Z D de ZD, larger than normal voltage V O of the absence disconnection of electromagnetic chuck, by setting smaller than the voltage V b when the disconnection electromagnetic chuck occurs At the time of disconnection, a current flows in the detection circuit so that the voltage is kept constant (voltage V ZD ), and the disconnection is reported to the subsequent circuit, for example, the circuit of the control unit of the personal computer. The constant current diode D protects the personal computer by limiting the current flowing in the subsequent circuit. During normal operation without disconnection of the electromagnetic chuck, no electric current flows through the Zener diode ZD, so the operation of the grinding machine is continued.
【００１５】請求項２の発明は、前記電磁チャックの断
線検出回路において、更に、交流電源と交流電源の電源
入力端子Ｔ１間に双方向サイリスタを介挿させ、抵抗Ｒ
2とコンデンサＣ2を直列に設けた双方向サイリスタ保護
回路を前記双方向サイリスタに対して並列に設けたこと
を特徴とする。The invention of claim 2 is the disconnection detecting circuit of said electromagnetic chuck, further, not inserted a bidirectional thyristor between the power supply input terminal T 1 of the AC power source and the AC power source, the resistor R
A bidirectional thyristor protection circuit in which 2 and a capacitor C 2 are provided in series is provided in parallel with the bidirectional thyristor.
【００１６】電磁チャック６をｏｎする前に電磁チャッ
クの断線の有無を確認するため、電磁チャックのｏｎ−
ｏｆｆ（入−切）を行う双方向サイリスタ及びその保護
回路に抵抗Ｒ2とコンデンサＣ2を取り付けると、抵抗Ｒ
2とコンデンサＣ2を通じてわずかな電流が流れる（電磁
チャックを励磁するほどの電流値ではない）。電磁チャ
ックに断線があると、双方向サイリスタがｏｆｆであっ
ても、検出回路のツエナ−ダイオ−ドＺＤに電圧を一定
（電圧ＶＺＤ）とするように電流が順方向にのみ流れ、
後の回路に断線が報される。Before the electromagnetic chuck 6 is turned on, the electromagnetic chuck is turned on-to check whether the electromagnetic chuck is broken.
If a resistor R 2 and a capacitor C 2 are attached to the bidirectional thyristor for turning off (on / off) and its protection circuit, the resistor R 2
A slight current flows through 2 and the capacitor C 2 (the current value is not enough to excite the electromagnetic chuck). If the electromagnetic chuck is broken, even if the bidirectional thyristor is off, current flows only in the forward direction so that the voltage is constant (voltage V ZD ) in the Zener diode ZD of the detection circuit.
A disconnection will be reported to the subsequent circuit.
【００１７】[0017]
【実施例】以下、図面を用いて本発明を更に詳細に説明
する。図１は本発明の電磁チャックの断線検出回路を示
す図、図２は本発明の別態様の電磁チャックの断線検出
回路を示す図、図３は電磁チャックの回路の配線図であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. 1 is a diagram showing a disconnection detection circuit of an electromagnetic chuck of the present invention, FIG. 2 is a diagram showing a disconnection detection circuit of an electromagnetic chuck of another aspect of the present invention, and FIG. 3 is a wiring diagram of a circuit of the electromagnetic chuck.
【００１８】図３に示す電磁チャックの回路において、
通常はＡＣ１００Ｖを入力すると直流電圧計はＤＣ９０
Ｖを表示する。Ａ部またはＢ部で断線が生じると直流電
圧計はＤＣ１４１Ｖを表示する。In the circuit of the electromagnetic chuck shown in FIG.
Normally, when AC100V is input, the DC voltmeter is DC90
Display V. When the disconnection occurs in the A section or the B section, the DC voltmeter displays DC141V.
【００１９】この現象を利用して、図１に示す電磁チャ
ックの断線検出回路を構成する。この断線検出回路は、
交流電源、交流電源の電源入力端子Ｔ１，電源出力端子
Ｔ２，および出力端子Ｔ３，Ｔ４を有するブリッジ回路
の前記両出力端子Ｔ３，Ｔ４に受電点を結んだ電磁チャ
ックの結線部に介設した端子Ｔ５，Ｔ６に、抵抗Ｒ１と
コンデンサＣ１の平滑回路を介設した整流器回路に、前
記平滑回路の抵抗Ｒ１とコンデンサＣ１間に介設した端
子Ｔ７よりツエナ−ダイオ−ドＺＤと定電流ダイオ−ド
Ｄおよび検出センサｓを直列して、かつ、前記コンデン
サＣ１に対して並列に設けた断線検出回路であって、ツ
エナ−ダイオ−ドＺＤの電圧ＶＺＤを、電磁チャックの
断線がないときの正常な電圧ＶＯよりは大きく、電磁チ
ャックに断線が生じた際の電圧Ｖｂより小さく設定した
断線検出回路である。By utilizing this phenomenon, the disconnection detection circuit of the electromagnetic chuck shown in FIG. 1 is constructed. This disconnection detection circuit
AC power supply, power supply input terminal T 1 of the AC power supply, power supply output terminal T 2, and the output terminals T 3, T 4 the two output terminals T 3, T 4 the connection of the electromagnetic chuck connecting the receiving point of the bridge circuit having the terminal T 5, T 6 which is interposed in part, resistor R 1 and the rectifier circuit which is interposed a smoothing circuit of a capacitor C 1, the resistance of the smoothing circuit R 1 and the terminal T 7 which is interposed between the capacitor C 1 more Zener - diode - de ZD and a constant current diode - the de D and sensor s in series, and a disconnection detecting circuit provided in parallel with the capacitor C 1, the Zener - diode - de of ZD This is a disconnection detection circuit in which the voltage V ZD is set to be larger than the normal voltage V O when there is no disconnection of the electromagnetic chuck and smaller than the voltage V b when the disconnection occurs in the electromagnetic chuck.
【００２０】この断線検出回路の抵抗Ｒ１とコンデンサ
Ｃ１の平滑回路（整流器の低域フィルタ）α−β間の電
圧は、通常はＤＣ９０Ｖであるが、整流器回路のＡ部ま
たはＢ部が断線するとα−β間の電圧はＤＣ１４１Ｖと
なる。予め、ツエナ−ダイオ−ドＺＤの電圧ＶＺＤをＤ
Ｃ１１０Ｖに選定しておくと、正常時の電圧９０Ｖは、
ツエナ−ダイオ−ドＺＤの電圧ＶＺＤの値１１０Ｖより
も低いので、ツエナ−ダイオ−ドＺＤには電流が流れ
ず、研削装置は正常運転される。The voltage between the smoothing circuit (low-pass filter of the rectifier) α-β of the resistor R 1 and the capacitor C 1 of this disconnection detection circuit is usually DC 90 V, but the A or B part of the rectifier circuit is disconnected. Then, the voltage between α and β becomes DC141V. The voltage V ZD of the Zener diode ZD is set to D in advance.
If you select C110V, the normal voltage 90V is
Since the voltage V ZD of the Zener diode ZD is lower than 110 V, no current flows through the Zener diode ZD, and the grinding machine operates normally.
【００２１】整流器回路のＡ部またはＢ部が断線し、α
−β間の電圧が１４１Ｖとなると、この値はツエナ−ダ
イオ−ドＺＤの電圧ＶＺＤの値１１０Ｖよりも高いの
で、この１４１Ｖの電圧がツエナ−ダイオ−ドＺＤに印
加されると、ツエナ−ダイオ−ドＺＤは電圧を１１０Ｖ
一定に保つように電流を急激に増加させ、後の回路、例
えば検出センサｓであるフォトカプラの発光ダイオ−ド
ＰＥＤが電流を受けて光を発し、これをフォトトランジ
スタＰＴが受光し、パソコン３１６の制御回路の記録部
ＲＡＭに信号が出力され、制御処理部よりシ−ケンサを
通して研削装置１のテ−ブル４を駆動するステップモ−
タ２４へ駆動停止の指示が、および砥石軸１１を昇降さ
せるサ−ボモ−タ１３へ駆動停止または逆回転の指示が
なされ、研削装置の運転が停止される。なお、抵抗Ｒ１
は２７ｋΩ、コンデンサＣの容量は４．７マイクロファ
ラディに設定した。The A or B section of the rectifier circuit is disconnected, and α
When the voltage between -β is 141V, the value Zener - is higher than the value 110V of voltage V ZD de ZD, the voltage of the 141V is Zener - - diode diode - when applied to de ZD, the Zener - Diode ZD has a voltage of 110V
The current is rapidly increased so as to keep it constant, and a subsequent circuit, for example, a light emitting diode PED of a photocoupler as a detection sensor s receives the current and emits light, which is received by the phototransistor PT, and the personal computer 316 receives the light. A signal is output to the recording section RAM of the control circuit, and the control processing section drives the table 4 of the grinding apparatus 1 through the sequencer.
The motor 24 is instructed to stop driving, and the servo motor 13 for raising and lowering the grindstone shaft 11 is instructed to stop driving or reversely rotate, and the operation of the grinding machine is stopped. The resistor R1
Is 27 kΩ, and the capacity of the capacitor C is 4.7 microfarady.
【００２２】なお、ツエナ−ダイオ−ドＺＤの後段に設
けられた定電流ダイオ−ドＤの定電流は、２．７ｍＡと
設定し、検出センサに流れる電流を制限し、検出センサ
を保護する。The constant current of the constant current diode D provided after the Zener diode ZD is set to 2.7 mA to limit the current flowing through the detection sensor to protect the detection sensor.
【００２３】電磁チャックのスイッチをｏｎする前に、
電磁チャックの断線の有無を確認するには、図２に示す
ように前記断線検出回路の交流電源と交流電源の電源入
力端子Ｔ１間に、更に、双方向サイリスタを介挿させ、
抵抗Ｒ2とコンデンサＣ2を直列に設けた双方向サイリス
タ保護回路を前記双方向サイリスタに対して並列に設け
る。Before turning on the switch of the electromagnetic chuck,
In order to confirm the presence or absence of disconnection of the electromagnetic chuck, as shown in FIG. 2, a bidirectional thyristor is further inserted between the AC power supply of the disconnection detection circuit and the power supply input terminal T 1 of the AC power supply,
A bidirectional thyristor protection circuit having a resistor R 2 and a capacitor C 2 provided in series is provided in parallel with the bidirectional thyristor.
【００２４】電磁チャック６をｏｎする前に電磁チャッ
クの断線の有無を確認するため、電磁チャックのｏｎ−
ｏｆｆ（入−切）を行う双方向サイリスタ及びその保護
回路に抵抗Ｒ2とコンデンサＣ2を取り付けると、正常
時、抵抗Ｒ2とコンデンサＣ2を通じてわずかな電流が流
れるが、電磁チャックを励磁するほどの電流値ではな
い。よって、段線検出回路のα−β間の電圧は、１１０
Ｖよりも低いので、ツエナ−ダイオ−ドＺＤには電流が
流れない。電磁チャックに断線があると、双方向サイリ
スタがｏｆｆであっても、検出回路のツエナ−ダイオ−
ドＺＤに電圧を一定（電圧ＶＺＤ）とするように電流が
順方向にのみ流れ、フォトカプラの発光ダイオ−ドＰＥ
Ｄが発光し、この光をフォトトランジスタＰＴが受光し
て断線をパソコンの記憶部に伝える。Before turning on the electromagnetic chuck 6, the electromagnetic chuck is turned on-to check whether the electromagnetic chuck is broken.
When a resistor R 2 and a capacitor C 2 are attached to a bidirectional thyristor that performs an off (on / off) operation and its protection circuit, a small current flows through the resistor R 2 and the capacitor C 2 under normal conditions, but it excites the electromagnetic chuck. The current value is not so high. Therefore, the voltage between α and β of the stage line detection circuit is 110
Since it is lower than V, no current flows through the Zener diode ZD. If the electromagnetic chuck is broken, the zener diode of the detection circuit will turn off even if the bidirectional thyristor is off.
A current flows only in the forward direction so that the voltage is kept constant (voltage V ZD ) in the drive ZD, and the light emitting diode PE of the photocoupler is supplied.
D emits light, and the phototransistor PT receives this light and transmits the disconnection to the storage unit of the personal computer.
【００２５】[0025]
【発明の効果】本発明の電磁チャックの断線検出回路
は、簡易な回路構造であり、断線検出回路の後の回路、
例えば、制御ユニット部に繋ぐ回路を定電流ダイオ−ド
で保護できるものである。The disconnection detection circuit of the electromagnetic chuck of the present invention has a simple circuit structure.
For example, a circuit connected to the control unit section can be protected by a constant current diode.
【図１】 本発明の電磁チャックの断線検出回路図であ
る。FIG. 1 is a circuit diagram of a disconnection detection circuit of an electromagnetic chuck of the present invention.
【図２】 本発明の別態様の電磁チャックの断線検出回
路図である。FIG. 2 is a disconnection detection circuit diagram of an electromagnetic chuck according to another aspect of the present invention.
【図３】 電磁チャックの回路を示す図である。FIG. 3 is a diagram showing a circuit of an electromagnetic chuck.
【図４】 電磁チャックを示す斜視図である。（公知）FIG. 4 is a perspective view showing an electromagnetic chuck. (Public)
【図５】 平面研削装置の斜視図である。（公知）FIG. 5 is a perspective view of a surface grinding device. (Public)
【図６】 平面研削装置の側面図である。（公知）FIG. 6 is a side view of the surface grinding apparatus. (Public)
【図７】 平面研削装置の正面図である。（公知）FIG. 7 is a front view of a surface grinding device. (Public)
Claims (2)
Ｔ１，電源出力端子Ｔ２，および出力端子Ｔ３，Ｔ４を
有するブリッジ回路の前記両出力端子Ｔ３，Ｔ４に受電
点を結んだ電磁チャック回路の結線部に介設した端子Ｔ
５，Ｔ６に、抵抗Ｒ１とコンデンサＣ１の平滑回路を介
設した整流器回路に、前記平滑回路の抵抗Ｒ１とコンデ
ンサＣ１間に介設した端子Ｔ７よりツエナ−ダイオ−ド
ＺＤと定電流ダイオ−ドＤおよび検出センサを直列し
て、かつ、前記コンデンサＣ１に対して並列に設けた断
線検出回路であって、ツエナ−ダイオ−ドＺＤの電圧Ｖ
ＺＤを、電磁チャックの断線がないときの正常な電圧Ｖ
Ｏよりは大きく、電磁チャックに断線が生じた際の電圧
Ｖｂより小さく設定したことを特徴とする、電磁チャッ
クの断線検出回路。1. A power receiving point is connected to the AC power supply, a power supply input terminal T 1 of the AC power supply, a power supply output terminal T 2 , and both output terminals T 3 and T 4 of a bridge circuit having output terminals T 3 and T 4. Terminal T provided at the connection part of the electromagnetic chuck circuit
5, the T 6, to the interposed a smoothing circuit of a resistor R 1 and capacitor C 1 rectifier circuit, Zener than the resistance R 1 and the terminal T 7 which is interposed between the capacitor C 1 of the smoothing circuit - diode - de ZD And a constant current diode D and a detection sensor in series and in parallel with the capacitor C 1 for detecting a disconnection, which is a voltage V of a Zener diode ZD.
ZD is the normal voltage V when the electromagnetic chuck is not broken
A disconnection detection circuit for an electromagnetic chuck, which is set to be larger than O and smaller than a voltage Vb when the electromagnetic chuck is disconnected.
端子Ｔ１間に双方向サイリスタを介挿させ、抵抗Ｒ2と
コンデンサＣ2を直列に設けた双方向サイリスタ保護回
路を前記双方向サイリスタに対して並列に設けたことを
特徴とする、請求項１に記載の電磁チャックの断線検出
回路。2. A bidirectional thyristor protection circuit in which a bidirectional thyristor is inserted between an AC power source and a power source input terminal T 1 of the AC power source and a resistor R 2 and a capacitor C 2 are provided in series. The disconnection detection circuit for an electromagnetic chuck according to claim 1, wherein the disconnection detection circuit is provided in parallel with the disconnection detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001218891A JP4805486B2 (en) | 2001-07-19 | 2001-07-19 | Electromagnetic chuck disconnection detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001218891A JP4805486B2 (en) | 2001-07-19 | 2001-07-19 | Electromagnetic chuck disconnection detection circuit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003031414A true JP2003031414A (en) | 2003-01-31 |
| JP2003031414A5 JP2003031414A5 (en) | 2008-07-17 |
| JP4805486B2 JP4805486B2 (en) | 2011-11-02 |
Family
ID=19052992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001218891A Expired - Lifetime JP4805486B2 (en) | 2001-07-19 | 2001-07-19 | Electromagnetic chuck disconnection detection circuit |
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| Country | Link |
|---|---|
| JP (1) | JP4805486B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021753A (en) * | 2011-09-21 | 2013-04-03 | Ls产电株式会社 | Adjustable under voltage trip device |
| KR101738418B1 (en) | 2017-03-30 | 2017-05-22 | 주식회사 삼흥테크놀리지 | Early safety alerting system for setting zero point with respect to the spindle positions of a dicing machine and the method therefor |
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|---|---|---|---|---|
| JPS584333U (en) * | 1981-07-02 | 1983-01-12 | フジ磁工株式会社 | Magnetic chuck with indicator light |
| JPS62158304A (en) * | 1985-12-28 | 1987-07-14 | Usac Electronics Ind Co Ltd | Detection system of solenoid disconnection |
| JPH01198286A (en) * | 1988-02-01 | 1989-08-09 | Matsushita Electric Ind Co Ltd | Regenerative processor |
| JPH0518476A (en) * | 1991-07-09 | 1993-01-26 | Sanmei Denki Kk | Terminal box for solenoid valve |
| JP2000184582A (en) * | 1998-12-10 | 2000-06-30 | Toyota Motor Corp | Solenoid driver |
| JP2000182827A (en) * | 1998-12-14 | 2000-06-30 | Kanetec Co Ltd | Power source unit for electromagnet |
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2001
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS584333U (en) * | 1981-07-02 | 1983-01-12 | フジ磁工株式会社 | Magnetic chuck with indicator light |
| JPS62158304A (en) * | 1985-12-28 | 1987-07-14 | Usac Electronics Ind Co Ltd | Detection system of solenoid disconnection |
| JPH01198286A (en) * | 1988-02-01 | 1989-08-09 | Matsushita Electric Ind Co Ltd | Regenerative processor |
| JPH0518476A (en) * | 1991-07-09 | 1993-01-26 | Sanmei Denki Kk | Terminal box for solenoid valve |
| JP2000184582A (en) * | 1998-12-10 | 2000-06-30 | Toyota Motor Corp | Solenoid driver |
| JP2000182827A (en) * | 1998-12-14 | 2000-06-30 | Kanetec Co Ltd | Power source unit for electromagnet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021753A (en) * | 2011-09-21 | 2013-04-03 | Ls产电株式会社 | Adjustable under voltage trip device |
| CN103021753B (en) * | 2011-09-21 | 2015-04-29 | Ls产电株式会社 | Adjustable under voltage trip device |
| KR101777425B1 (en) * | 2011-09-21 | 2017-09-12 | 엘에스산전 주식회사 | Adjustable under voltage trip device |
| KR101738418B1 (en) | 2017-03-30 | 2017-05-22 | 주식회사 삼흥테크놀리지 | Early safety alerting system for setting zero point with respect to the spindle positions of a dicing machine and the method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4805486B2 (en) | 2011-11-02 |
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