JPS6094226A - Electric discharge machining gap control device - Google Patents
Electric discharge machining gap control deviceInfo
- Publication number
- JPS6094226A JPS6094226A JP58201426A JP20142683A JPS6094226A JP S6094226 A JPS6094226 A JP S6094226A JP 58201426 A JP58201426 A JP 58201426A JP 20142683 A JP20142683 A JP 20142683A JP S6094226 A JPS6094226 A JP S6094226A
- Authority
- JP
- Japan
- Prior art keywords
- machining
- gap
- reciprocating motion
- machining gap
- control device
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/16—Electric circuits specially adapted therefor, e.g. power supply for preventing short circuits or other abnormal discharges by altering machining parameters using adaptive control
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は加工形状電極またはソイＡ７Ｎ極を使用した放
電加工装置にＪ３いて特に加工間隙制御装置に間層るも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly applied to a machining gap control device in an electric discharge machining apparatus using a machining shape electrode or a soy A7 N pole.
従来においてサーボ制御されながら放電加工が行なわれ
ている最中の加工間隙を急速に広げるレシプロ運動制御
装置を設けた装置は知られている。2. Description of the Related Art Conventionally, a device is known that is equipped with a reciprocating motion control device that rapidly widens a machining gap during electrical discharge machining under servo control.
このレシプロ運動制御装置は加工間隙を急速に広げてそ
こに堆積している加工屑、ガス等を加工液とともに流出
排除し新しい液を流入させ間隙を狭めたとき正常な放電
を再開させることができるようにしたもので、通常加工
屑がｊ「積する一定期間毎に前記レシプロ運動制御装置
を作動させるようにするとか、繰返される放電の内の正
常放電数とか不正常放電の数を計数してそれが所定値に
達したとき前記レシプロ運動制御装置を作動させるよう
にしていた。This reciprocating motion control device rapidly widens the machining gap, removes machining debris, gas, etc. accumulated there along with the machining fluid, and allows new fluid to flow in to narrow the gap and resume normal electrical discharge. In this system, the reciprocating motion control device is operated at regular intervals during which machining debris accumulates, or the number of normal discharges and the number of abnormal discharges among repeated discharges is counted. When it reaches a predetermined value, the reciprocating motion control device is activated.
しかしながら水系加工液、即ち水をべ一又として例えば
水溶性のシリコーン油とか諸種の界面活性剤等を添加混
合した加工液を用いることが既に提案されているが、こ
のような不燃性の加工液を用いて放電加工するとき、種
々の試験研究の結果によると、放電を繰返しているうち
に次第に加工液成分が分解してきて、分解に対応して液
の比抵抗が低下してくることがわかった。However, it has already been proposed to use water-based machining fluids, i.e., machining fluids in which water is used as a base and water-soluble silicone oil or various surfactants are added and mixed, but such non-flammable machining fluids According to the results of various test studies, it has been found that during electrical discharge machining using electric discharge, the components of the machining fluid gradually decompose as the electrical discharge is repeated, and the specific resistance of the fluid decreases in response to the decomposition. Ta.
加工液比抵抗が低下′りると放電が安定せず７−り放電
が発生し加工量が低減して加工速度が低下し、また加工
面粗さが悪くなる。When the specific resistance of the machining fluid decreases, the electrical discharge becomes unstable and a recurrent electrical discharge occurs, reducing the amount of machining, reducing the machining speed, and worsening the roughness of the machined surface.
本発明は以上の点に鑑みて、レシプロ運動の制御を加工
液の抵抗値が所定以下に下がったときレシプロ運動をｌ
ｌｊかＵて加工液の更新を行なわせるようにしたｂのＣ
′ある。In view of the above points, the present invention controls the reciprocating motion by controlling the reciprocating motion when the resistance value of the machining fluid falls below a predetermined value.
C of b that made the machining fluid be updated by lj or U.
'be.
以下図面の一実施例により本発明−を説明する。The present invention will be explained below with reference to an embodiment of the drawings.
第１図において、１は電極、２は被加工体で、両者相対
向して加工間隙を形成覆る。３は加］二間隙に並列に接
続した加ＩＩ用電源、４は加工間隙の電圧を信号どし−
Ｃ電極１に追従り一−ボ送りを与えるど共に、これどは
別に前記電極１を急速に上昇させることにＪ、り間隙を
・広げるレシプロ運動の制御を与える駆動装置Ｎである
ｎ ５は間隙の電圧検出抵抗、６は加１間隙の抵抗値を
検出する検出電源、７がその信号検出抵抗（゛、１列回
路を間隙に並列接続する。８は抵抗７の検出信号を判別
づる判別回路で、−宇部ｆ（を値を設定し検出信号が基
準値以下になると信号を出力覆る。９はその判別出力に
応答してレシプロ運動を行なわけるための信号を出力す
る制御回路で、この出力を駆動装置４に加えてレシプロ
制御づる。In FIG. 1, 1 is an electrode, and 2 is a workpiece, which are opposed to each other and cover each other to form a processing gap. 3 is the power supply for the addition II connected in parallel to the two gaps, and 4 is the signal for the voltage of the machining gap.
N5 is a driving device N5 which provides one-stroke feed to follow the electrode 1, and also provides control of reciprocating movement to quickly raise the electrode 1 and widen the gap. A gap voltage detection resistor, 6 is a detection power supply for detecting the resistance value of the gap, 7 is a signal detection resistor (1, one column circuit is connected in parallel to the gap, 8 is a discriminator that discriminates the detection signal of the resistor 7) In the circuit, -Ube f( is set to a value, and when the detection signal becomes less than the reference value, a signal is output and reversed. 9 is a control circuit that outputs a signal for performing reciprocating motion in response to the discrimination output. The output is applied to the drive device 4 for reciprocating control.
本発明において電極１、被加工体２の加工間隙に供給す
る加工液は水をベースにした加工効果を高める第２物質
を添加混合した液であり、その第２物質としては例えば
水溶性シリコーン油とが諸種の界面活性剤である。しか
しこれらの混合液は加工中に前記添加物質が放電により
分解する。分解によって次第に液の比抵抗値が低下して
くると加工作用が低下し、実験によればそれが約１０３
ΩＣ１１以下程度に下がったところで加工量が急に低下
づることがわかっ／ｊ０通常通常加液二液環して加工ｆ
ｌｌ（ｆｔ；Ｉ隙に供給しているが、加工間隙は微小に
保たれており、かも凹凸等があって間隙に介在する加工
液は全て充分に更新されるわりではなく、特に加工面積
が広いど液の通りは悪くなる。従って加工間隙に介在す
る全体の液の比抵抗値は前記放電分解作用により次第に
低下してくるわＣすで、その比抵抗値の低下程度が前記
した約１０３０ｃＩＩより下がったとき、レシプロ運動
制御により加工間隙を広げてやることにより加工液の更
新が良く行なわれ、以後安定加工が復帰づる。勿論前記
設定比抵抗値は添加物質の種類及び添加量により異なる
値であり、個々の加工液に対して実験値をめて判別基準
値を設定づる必要がある。In the present invention, the machining liquid supplied to the machining gap between the electrode 1 and the workpiece 2 is a water-based liquid mixed with a second substance that enhances the machining effect, and the second substance is, for example, water-soluble silicone oil. These are various types of surfactants. However, in these mixed liquids, the additive substances are decomposed by electrical discharge during machining. As the specific resistance value of the liquid gradually decreases due to decomposition, the machining action decreases, and experiments show that it is approximately 103
It was found that the processing amount suddenly decreased when the ΩC fell to about 11 or less.
The machining fluid is supplied to the ll (ft; The passage of the liquid in the wide gap becomes difficult.Therefore, the resistivity value of the entire liquid intervening in the machining gap gradually decreases due to the discharge decomposition effect. When the specific resistance value decreases, the machining fluid is refreshed by widening the machining gap using reciprocating motion control, and stable machining is restored thereafter.Of course, the set resistivity value differs depending on the type and amount of additive material. Therefore, it is necessary to set the discrimination reference value by calculating experimental values for each machining fluid.
しかして加工面積、液温度等を一定とすれば加工間隙に
介在する加工液の比抵抗値に比例した信号が検出抵抗７
に検ＩＪ１されるわ（〕で、従って前記加工液比抵抗値
が１０３ΩＣ１程度に対応する電圧を判別回路８に判別
４ Ｑｊ （（ｉとして設定しておき、検出抵抗７の検
出信号を判別回路８で判別して基準値以下のとき判別信
号を出力する。出力は直ちに制御回路９に加わりレシプ
ロ信号を出力して駆動装置４に加え、電（−１を急−Ｌ
４し間隙を広げて介在する液の更新、洗浄を行なわせる
。加工液は加工間隙の周りに対向りるノズル或いは電極
の噴流孔から噴剣Ｊるようにしてあれば、洗浄効果は高
まり新しい液どの更新は良好に行なわれる。また広がっ
た間隙に空気等を吹いて付看する液を排除してから新し
い加工液を供給するようにすることもできる。こうして
所定時間、所定長さ間隙を広げて洗浄して後に電極１を
再び下降して所定の微小間隙を形成して放電加工を再開
づる。このときは介在加工液の比抵抗値が増大している
から検出抵抗７の検出信号電圧は低減し判別回路８から
は信号が出力しないで、レシプロ運動は行なわれず、加
工間隙の電圧を抵抗５で検出し、検出信号電圧で駆動装
置４を制御しサーボにより加工間隙を一定に維持し安定
した放電加工を進めることができる。However, if the machining area, liquid temperature, etc. are constant, a signal proportional to the specific resistance value of the machining fluid interposed in the machining gap will be detected by the detection resistor 7.
Therefore, the voltage corresponding to the machining fluid specific resistance value of about 103ΩC1 is detected by the discrimination circuit 8 as 4Qj (((i), and the detection signal of the detection resistor 7 is detected by the discrimination circuit. 8 and outputs a discrimination signal when the value is below the reference value.The output is immediately applied to the control circuit 9, outputs a reciprocating signal, and is applied to the drive device 4.
4. The gap is widened to allow the intervening liquid to be renewed and cleaned. If the machining fluid is sprayed from nozzles or jet holes of electrodes facing around the machining gap, the cleaning effect will be enhanced and the replacement of new fluid will be carried out well. It is also possible to blow air or the like into the widened gap to remove the added liquid before supplying new machining liquid. After widening the gap by a predetermined length for a predetermined time and cleaning, the electrode 1 is lowered again to form a predetermined minute gap and electric discharge machining is restarted. At this time, since the specific resistance value of the intervening machining fluid is increasing, the detection signal voltage of the detection resistor 7 is reduced, and no signal is output from the discrimination circuit 8, and no reciprocating movement is performed, and the voltage of the machining gap is increased by the resistor 7. The driving device 4 is controlled by the detection signal voltage, and the machining gap is maintained constant by the servo, so that stable electric discharge machining can be performed.
第２図は本発明を従来のものと比較した加工性能のグラ
フ図で、被加工体に３５５ＣＩを用いグラファイト電極
で、電極消耗比１％以外の条件で加工した。加工液には
水ベースに水溶性シリコーン油を添加混合し比抵抗値が
約１．５Ｘ ｉＱ４Ωｃｈ＋とした加工液を用いた。そ
して本発明によるレシプロ運動は加工液の比抵抗値が３
ｘ １０３Ωｃｈｉ以下になったとき、これを検出して
レシプロ運動させるようにしたものである。グラフ図の
横軸は加工而粗さで、面相さに対する縦軸の加工速度の
関係をグラフに示した。図中３ｃＩ１２．１０ｃｌ１２
．２５ｃｌ１２、？００ｃｉ２は各々加工面積で、加工
面積が大きいと加工液の更新が悪くなり加工面粗さが悪
くなるが、本発明によるとぎは１００ｃｍ２の加工面積
において面粗さも充分小さくでき、加工速度も高められ
ることが判る。FIG. 2 is a graph showing the machining performance of the present invention compared with the conventional one. The workpiece was machined using 355 CI with a graphite electrode under conditions other than the electrode consumption ratio of 1%. The processing fluid used was a water-based processing fluid with water-soluble silicone oil added and mixed to have a specific resistance value of approximately 1.5X iQ4Ωch+. In addition, in the reciprocating motion according to the present invention, the specific resistance value of the machining fluid is 3.
When it becomes less than x103Ωchi, this is detected and reciprocating motion is performed. The horizontal axis of the graph is machining roughness, and the vertical axis is the relationship between machining speed and surface roughness. In the figure 3cI12.10cl12
．． 25cl12,? 00ci2 is the machining area, and if the machining area is large, the machining fluid will not be refreshed properly and the machining surface roughness will deteriorate, but the sharpener according to the present invention can sufficiently reduce the surface roughness in a machining area of 100 cm2 and increase the machining speed. I understand that.
以上のように本発明によれば加工間隙の抵抗値を検出し
判別して信号が設定された一定値以下になったどぎレシ
プロ運動を作動制御して加工液の更新を行なうＪ：うに
したので、水ベース加工液の使用による放電加工を加工
面粗さを小さく加工速度を高くして性能を向上させるこ
とができる効果がある。As described above, according to the present invention, the resistance value of the machining gap is detected and determined, and the reciprocating motion when the signal becomes less than a set certain value is activated and controlled to update the machining fluid. Therefore, the performance of electric discharge machining using a water-based machining fluid can be improved by reducing the roughness of the machined surface and increasing the machining speed.
第１図は本発明の一実施例構成図、第２図は比較実験例
のグラフ図である。
１・・・・・・・・・電極
２・・・・・・・・・被加工体
３・・・・・・・・・加工用電源
４・・・・・・・・・サーボ兼しシプロ運動駆動装！５
・・・・・・・・・電圧検出抵抗
１・・・・・・・・・抵抗値検出抵抗
８・・・・・・・・・判別回路
９・・・・・・・・・制御回路
特 許 出 願 人
株式会社井上ジャパックス研究所FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a graph diagram of a comparative experimental example. 1... Electrode 2... Workpiece 3... Processing power supply 4... Also serves as servo Cipro movement drive system! 5
......Voltage detection resistor 1...Resistance value detection resistor 8...Discrimination circuit 9...Control circuit Patent applicant: Inoue Japax Institute Co., Ltd.
Claims (1)
ながら水系加工液を供給するとともにパルスを加えて繰
返放電を光生ずることにより加工する放電加工装置にお
いて、前記加工間隙を制御するサーボ装置が兼用づるこ
とがある前記加工間隙を急速に広げるレシプロ運動制御
装置を設け、前記加工間隙の抵抗１ｉｃ［を検出し判別
して信号が設定された一定値以下になったとき前記レシ
プロ運動装置にレシプロ運動制御信号を供給する検出制
御装置を設ＣＩこことを特徴とづる放電加工間隙制御装
置。In an electrical discharge machining device that performs machining by supplying water-based machining fluid while giving servo feed to a machining gap consisting of two bodies, an electrode and a liquid supply, and applying pulses to generate a repetitive electrical discharge, the servo controls the machining gap. A reciprocating motion control device that rapidly widens the machining gap, which may also be used as a device, is provided, and when the resistance 1ic of the machining gap is detected and determined, and the signal becomes less than a predetermined value, the reciprocating motion control device An electrical discharge machining gap control device characterized by a detection control device for supplying a reciprocating motion control signal to a CI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201426A JPS6094226A (en) | 1983-10-26 | 1983-10-26 | Electric discharge machining gap control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201426A JPS6094226A (en) | 1983-10-26 | 1983-10-26 | Electric discharge machining gap control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6094226A true JPS6094226A (en) | 1985-05-27 |
Family
ID=16440882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58201426A Pending JPS6094226A (en) | 1983-10-26 | 1983-10-26 | Electric discharge machining gap control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6094226A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297462A (en) * | 1997-04-28 | 1998-11-10 | Toyota Motor Corp | Braking force controller |
| JP2009269465A (en) * | 2008-05-07 | 2009-11-19 | Toyota Motor Corp | Control device of braking device |
| JP2009292312A (en) * | 2008-06-05 | 2009-12-17 | Nissan Motor Co Ltd | Cooperative control device of composite brake |
| JP2010047201A (en) * | 2008-08-25 | 2010-03-04 | Hitachi Automotive Systems Ltd | Brake device and brake control method |
| JP2012030731A (en) * | 2010-08-02 | 2012-02-16 | Nissan Motor Co Ltd | Brake control device of electric vehicle |
| WO2012104903A1 (en) * | 2011-01-31 | 2012-08-09 | スズキ株式会社 | Regenerative control device, regenerative control method, and hybrid vehicle |
| JP2012157213A (en) * | 2011-01-28 | 2012-08-16 | Nissan Motor Co Ltd | Vehicle controller |
-
1983
- 1983-10-26 JP JP58201426A patent/JPS6094226A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297462A (en) * | 1997-04-28 | 1998-11-10 | Toyota Motor Corp | Braking force controller |
| JP2009269465A (en) * | 2008-05-07 | 2009-11-19 | Toyota Motor Corp | Control device of braking device |
| JP2009292312A (en) * | 2008-06-05 | 2009-12-17 | Nissan Motor Co Ltd | Cooperative control device of composite brake |
| JP2010047201A (en) * | 2008-08-25 | 2010-03-04 | Hitachi Automotive Systems Ltd | Brake device and brake control method |
| JP2012030731A (en) * | 2010-08-02 | 2012-02-16 | Nissan Motor Co Ltd | Brake control device of electric vehicle |
| JP2012157213A (en) * | 2011-01-28 | 2012-08-16 | Nissan Motor Co Ltd | Vehicle controller |
| WO2012104903A1 (en) * | 2011-01-31 | 2012-08-09 | スズキ株式会社 | Regenerative control device, regenerative control method, and hybrid vehicle |
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