JPH02185315A - Electric discharge machining device - Google Patents
Electric discharge machining deviceInfo
- Publication number
- JPH02185315A JPH02185315A JP48689A JP48689A JPH02185315A JP H02185315 A JPH02185315 A JP H02185315A JP 48689 A JP48689 A JP 48689A JP 48689 A JP48689 A JP 48689A JP H02185315 A JPH02185315 A JP H02185315A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- discharge
- workpiece
- resistance
- discharge circuit
- 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
- 238000003754 machining Methods 0.000 title abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000009760 electrical discharge machining Methods 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 abstract description 11
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 8
- 238000013016 damping Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000002238 attenuated effect Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000009763 wire-cut EDM Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、被加工物と主電極との間に放電を発生させて
加工を行なう放電加工装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an electrical discharge machining apparatus that performs machining by generating electrical discharge between a workpiece and a main electrode.
（従来の技術）
第３図はワイヤ放電加工装置の構成図であって、被加工
物１に対してワイヤ電極２が配置されている。そして、
これら被加工物１とワイヤ電極２との間に被加工物１を
正極（＋）として直流電源３が接続されている。こ、れ
により、被加工物１に対してワイヤ電極２が所定距離に
なると被加工物１とワイヤ電極２との間に放電が発生し
て被加工物１が加工される。(Prior Art) FIG. 3 is a configuration diagram of a wire electric discharge machining apparatus, in which a wire electrode 2 is arranged with respect to a workpiece 1. and,
A DC power source 3 is connected between the workpiece 1 and the wire electrode 2, with the workpiece 1 as the positive electrode (+). As a result, when the wire electrode 2 reaches a predetermined distance from the workpiece 1, electric discharge occurs between the workpiece 1 and the wire electrode 2, and the workpiece 1 is machined.
ところで、かかる放電加工では被加工物１として金属の
加工が行われている。そして、この金属はその抵抗値が
１０−５〜ｌ０−４Ω■オーダのものとなっている。一
方、放電加工での放電回路つまり直流電源３から見た等
価回路は、放電ギャップ抵抗や放電ギャップ容量等によ
りインダクタンス、抵抗及びコンデンサの直列回路とな
っている。そして、この放電回路は、上記の抵抗値を持
った金属の被加工物１が最も良い効率で加工が行えるよ
うに振動回路に形成されている。つまり、かがる放電回
路における合成インダクタンスをり、％合成抵抗をＲ６
、合成容量をＣ６とすると次式が成立つＯ
そして、この式から放電電流ｌを求めると、ｔ ＝／Ｊ
−Ａｔεｐ鵞ｔ ＋ｐ、Ａ、εｐｌｔここで、
であり、又Ａ、、Ａ２は積分定数で、初期条件によって
決定される。By the way, in such electrical discharge machining, metal is processed as the workpiece 1. The resistance value of this metal is on the order of 10-5 to 10-4 Ω■. On the other hand, the discharge circuit in electrical discharge machining, that is, the equivalent circuit seen from the DC power supply 3, is a series circuit of inductance, resistance, and capacitor due to discharge gap resistance, discharge gap capacity, and the like. This discharge circuit is formed into a vibrating circuit so that the metal workpiece 1 having the above-mentioned resistance value can be machined with the highest efficiency. In other words, the combined inductance in the discharge circuit is calculated as R6, and the combined resistance as % is R6.
, and if the combined capacitance is C6, then the following formula holds O. Then, when calculating the discharge current l from this formula, t = /J
−Atεp鵞t +p, A, εplt where, and A, , A2 are integral constants, which are determined by the initial conditions.
上記１）＋１９２の根号の中の正負によって、ｐｌ、ｐ
ｌは実数か複素数かになり、又根号の中が「０」になれ
ばｐｌ、ｐｌは相等しい実数になる。これら３つの場合
に応じて放電電流ｉは異なることになる。しかるに、上
記述べたように金属の被加工物１を放電加工する場合に
は放電回路は振動回路となっているので、
Ｒｏく２ｆｒ「７で丁
の回路定数に設定されている。しかるに、その放電電流
ｉは第４図に示すように時間経過とともに振動する。な
お、実際の放電加工では第４図に示す放電電流ｉのうち
第２半波以降はカットされている。pl, p depending on the sign of the radical sign of 1) +192 above.
l can be a real number or a complex number, and if the radical sign is "0", pl and pl become equal real numbers. The discharge current i will differ depending on these three cases. However, as mentioned above, when electrical discharge machining is performed on the metal workpiece 1, the electrical discharge circuit is an oscillating circuit, so the circuit constant is set to 7. The discharge current i oscillates over time as shown in Fig. 4. In actual electrical discharge machining, the second half wave and subsequent half waves of the discharge current i shown in Fig. 4 are cut off.
ところが、上記構成の放電回路を用いて高抵抗値１０−
’ −１００Ωロオーダの被加工物例えばセラミックを
加工すると、放電回路における抵抗分Ｒ０が大きくなっ
て放電回路は振動回路から減衰回路ＲＯ＞ ２ ＬＯ
／ Ｃ。However, using the discharge circuit with the above configuration, a high resistance value of 10-
' - When machining a workpiece with a low order of 100 Ω, such as a ceramic, the resistance R0 in the discharge circuit becomes large, and the discharge circuit changes from an oscillating circuit to a damping circuit RO> 2 LO
/C.
に変わってしまう。従って、放電電流ｉは第５図に示す
ようにそのピーク値が非常に低下してしまう。このため
、異常放電が発生したり、又ショートが起こって放電加
工が不可能となっていた。It changes to Therefore, the peak value of the discharge current i decreases significantly as shown in FIG. For this reason, abnormal electrical discharge occurs or short circuit occurs, making electrical discharge machining impossible.
（発明が解決しようとする課題）
以上のように高抵抗の被加工物を放電加工しようとする
と、異常放電などが発生して放電加工の効率が低下する
ばかりでなく放電加工が不可能となっていた。(Problems to be Solved by the Invention) As described above, when electrical discharge machining is attempted on a workpiece with high resistance, abnormal electrical discharge occurs, which not only reduces the efficiency of electrical discharge machining, but also makes electrical discharge machining impossible. was.
そこで本発明は、通常の放電加工ばかりでなく高抵抗の
被加工物でも効率良く放電加工ができる放電加工装置を
提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electric discharge machining apparatus that can efficiently perform electric discharge machining not only on ordinary electric discharge machining but also on high-resistance workpieces.
［発明の構成］
（課題を解決するための手段）
本発明は、主電極と被加工物との間に放電を発生させて
被加工物を加工する放電加工装置において、主電極及び
被加工物などで形成される放電回路のインダクタンス成
分、抵抗成分及び容量成分を測定する回路定数測定手段
と、放電回路に接続されインダクタンス及び容量等の各
素子から成る安定化スタック回路と、回路定数測定手段
の測定結果から放電回路の特性を判断し、この判断の結
果特性が減衰であれば安定化スタック回路の各素子を選
択及び可変して放電回路の特性を振動に調整する特性調
整手段とを備えて上記目的を達成しようとする放電加工
装置である。[Structure of the Invention] (Means for Solving the Problems) The present invention provides an electric discharge machining apparatus that processes a workpiece by generating electrical discharge between the main electrode and the workpiece. circuit constant measuring means for measuring the inductance, resistance and capacitance components of a discharge circuit formed by the above circuit, a stabilizing stack circuit connected to the discharge circuit and consisting of various elements such as inductance and capacitance, and a circuit constant measuring means. Characteristic adjustment means for determining the characteristics of the discharge circuit from the measurement results, and selecting and varying each element of the stabilizing stack circuit to adjust the characteristics of the discharge circuit to vibration if the characteristics are attenuated as a result of this determination. This is an electric discharge machining device that attempts to achieve the above object.
（作用）
このような手段を備えたことにより、放電回路のインダ
クタンス成分、抵抗成分及び容量成分が回路定数測定手
段により測定され、これら成分により放電回路の特性が
特性調整手段により判断される。そして、この判断の結
果、特性調整手段は放電回路の特性が減衰と判断すると
安定化スタック回路の各素子を選択及び可変して放電回
路の特性を振動に設定する。(Function) By providing such means, the inductance component, resistance component, and capacitance component of the discharge circuit are measured by the circuit constant measuring means, and the characteristics of the discharge circuit are determined by the characteristic adjustment means based on these components. As a result of this determination, if the characteristic adjusting means determines that the characteristic of the discharge circuit is attenuated, it selects and varies each element of the stabilizing stack circuit to set the characteristic of the discharge circuit to oscillation.
（実施例）
以下、本発明の一実施例について図面を参照して説明す
る。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図はワイヤ放電加工装置の構成図である。FIG. 1 is a configuration diagram of a wire electrical discharge machining apparatus.
同図において１０は被加工物である。この被加工物１０
の加工部分にはワイヤ電極１１が配置されている。そし
て、これら被加工物１０とワイヤ電極１１との間には直
流電源１２が被加工物１０を正極（＋）としてリード線
１３を介して接続されている。さらに、ワイヤ電極１１
と直流電源１２との間には安定化スタック回路１４が接
続されている。この安定化スタック回路１４は、インダ
クタンス成分や容量成分を持ったもので、具体的には可
変コイルＬａに可変抵抗Ｒａが直列接続されるとともに
複数のコンデンサｃ１．ｃ２・・・Ｃｎと複数のスイッ
チＳ、、ＳＺ・・・Ｓｎとの各直列回路が並列に接続さ
れかつスイッチＳｏが並列接続された容量可変回路１５
が直列接続されたものとなっている。In the figure, 10 is a workpiece. This workpiece 10
A wire electrode 11 is placed in the processing area. A DC power supply 12 is connected between the workpiece 10 and the wire electrode 11 via a lead wire 13, with the workpiece 10 serving as a positive terminal (+). Furthermore, the wire electrode 11
A stabilizing stack circuit 14 is connected between the DC power supply 12 and the DC power supply 12 . This stabilizing stack circuit 14 has an inductance component and a capacitance component, and specifically includes a variable resistor Ra connected in series to a variable coil La, and a plurality of capacitors c1. A variable capacitance circuit 15 in which series circuits of c2...Cn and a plurality of switches S, SZ...Sn are connected in parallel, and a switch So is connected in parallel.
are connected in series.
一方、１６は回路定数測定手段であって、これは放電回
路のインダクタンス成分、抵抗成分及び容量成分を測定
する機能を有するものである。具体的には放電回路に対
してインダンタンス（Ｌ）Ａ？Ｊ定回路１７、抵抗（Ｒ
）測定回路１８及び容量（Ｃ）測定回路１９がが並列接
続されたものとなっている。そして、これら測定回路１
７，８゜１９の各ａＰ１定結果は特性調整手段２０に送
られるようになっている。この特性調整手段２０は各測
定回路１７．１８．１９の測定結果から放電回路の特性
つまり振動回路か減衰回路かを判断し、この判断結果、
放電回路が減衰回路と判定されれば安定化スタック回路
１４の可変コイルＬａ及び可変抵抗Ｒａを可変するとと
もに各コンデンサ０１〜Ｓｎを放電回路に接続して放電
回路を振動回路に強制的に換える機能を有、するもので
ある。具体的には各測定回路１７，１８．１９の測定結
果から
Ｒｏ＜２＄τ丁
が成立するかを判定して放電回路が振動回路か減衰回路
かを判断し、この判断の結果減衰回路と判断すればＲｏ
と２ｆ［７７τ丁との差に応じて可変コイルＬａ、可変
抵抗Ｒａの可変量及び各コンデンサＣ１ｗＣｎの接続数
を求める機能を有する特性判断部２１と、この特性判断
部２１で求められた可変コイルＬａ、可変抵抗Ｒａの可
変量及び各コンデンサＣ１〜Ｃｎの接続数を受けて可変
コイルｔａ、可変抵抗Ｒａをそれぞれ可変駆動するとと
もに各スイッチ５（１−Ｓｎを開閉制御する機能を有す
る調整駆動部２２から構成されている。On the other hand, 16 is circuit constant measuring means, which has the function of measuring the inductance component, resistance component, and capacitance component of the discharge circuit. Specifically, indance (L)A? for the discharge circuit? J constant circuit 17, resistance (R
) measurement circuit 18 and capacitance (C) measurement circuit 19 are connected in parallel. And these measurement circuits 1
The aP1 constant results of 7 and 8 degrees 19 are sent to the characteristic adjustment means 20. This characteristic adjustment means 20 determines the characteristics of the discharge circuit, that is, whether it is an oscillating circuit or a damping circuit, from the measurement results of each measuring circuit 17, 18, and 19, and as a result of this determination,
If the discharge circuit is determined to be an attenuation circuit, the function changes the variable coil La and variable resistance Ra of the stabilizing stack circuit 14, connects each capacitor 01 to Sn to the discharge circuit, and forcibly changes the discharge circuit to an oscillating circuit. It is something that has or does. Specifically, it is determined from the measurement results of each measuring circuit 17, 18, 19 whether Ro<2$τt holds true, and it is determined whether the discharge circuit is an oscillating circuit or a damping circuit. Judging by Ro
and 2f[77τ], and a characteristic determining unit 21 having a function of determining the variable amount of variable coil La, variable resistor Ra, and the number of connections of each capacitor C1wCn according to the difference between An adjustment drive unit has a function of variably driving the variable coil ta and variable resistor Ra in response to the variable amount of La, variable resistor Ra and the number of connections of each capacitor C1 to Cn, and controlling the opening and closing of each switch 5 (1-Sn). It consists of 22.
なお、特性判断部２１には特性判断表示部２３及び放電
電流表示部２４が接続されており、特性判断部２１は、
放電回路の特性を表示するとともに測定されたインダク
タンス、抵抗及び容量から放電回路のインピーダンスを
求め、このインピーダンスと直流電源１２の出力電圧と
から放？８電流を求めて表示するようになっている。Note that a characteristic determination display section 23 and a discharge current display section 24 are connected to the characteristic determination section 21, and the characteristic determination section 21
In addition to displaying the characteristics of the discharge circuit, the impedance of the discharge circuit is determined from the measured inductance, resistance, and capacitance, and the discharge voltage is determined from this impedance and the output voltage of the DC power supply 12. 8 Current is calculated and displayed.
ところで、かかる装置の等価回路は第２図に示す通りで
ある。ここで、直流電源１２は実際にはコンデンサＣａ
に直流電圧を印加してその充電電圧Ｖを用いているので
、第２図では直流電源１２をコンデンサＣａとして示し
である。そこで、放電回路の等価回路は、リード線１３
のリード線抵抗Ｒ１同リード線１３のインダクタンスし
、リード線１３とワイヤ電極１１との接触抵抗ｒｌ、被
加工物１０とワイヤ電極１１との間のギャップにおける
抵抗「２、同ギャップにおける放電ギヤツブ容ｆｉｔｃ
ｇ、被加工物１０の抵抗Ｒａ及び特性設定回路１４が直
列接続されたものとなっている。By the way, the equivalent circuit of such a device is as shown in FIG. Here, the DC power supply 12 is actually a capacitor Ca.
In FIG. 2, the DC power supply 12 is shown as a capacitor Ca because a DC voltage is applied to the DC voltage and the charging voltage V is used. Therefore, the equivalent circuit of the discharge circuit is the lead wire 13.
The lead wire resistance R1 is the inductance of the lead wire 13, the contact resistance rl between the lead wire 13 and the wire electrode 11, the resistance at the gap between the workpiece 10 and the wire electrode 11 "2, the discharge gear capacity at the same gap" fitc
g, the resistance Ra of the workpiece 10, and the characteristic setting circuit 14 are connected in series.
次に上記の如く構成された装置の作用について説明する
。Next, the operation of the apparatus configured as described above will be explained.
先ず、抵抗値１０−５〜１Ｏ−４Ωロオーダの金属の被
加工物１０を放電加工する場合は、安定スタック回路１
４の可変コイルＬａ及び可変抵抗Ｒａを最小値に調整す
るとともにスイッチＳＯを閉じ、スイッチ５ｌ−３ｎを
開放する。この状態であれば、上記放電回路は、
Ｒｏ＜２ｆｒ７〕で丁
となって振動回路となる。しかるに、直流電圧の印加及
びワイヤ電極１１の移動により被加工物１０とワイヤ電
極１１とのギャップが所定距離になると、被加工物１０
とワイヤ電極１１との間に放電が発生して、被加工物１
０は加工される。First, when electrical discharge machining is performed on a metal workpiece 10 with a resistance value of 10-5 to 1O-4Ω low order, the stable stack circuit 1 is
The variable coil La and the variable resistor Ra of No. 4 are adjusted to the minimum values, the switch SO is closed, and the switches 5l to 3n are opened. In this state, the discharge circuit becomes an oscillating circuit when Ro<2fr7]. However, when the gap between the workpiece 10 and the wire electrode 11 becomes a predetermined distance due to the application of DC voltage and the movement of the wire electrode 11, the workpiece 10
Electric discharge occurs between the wire electrode 11 and the workpiece 1
0 is processed.
次に上記状態から被加工物１０を１０−１〜１００Ω国
オーダの高抵抗、例えばセラミックに換えて放電加工を
行なう場合について説明する。この状態にインダクタン
スｉｌＦ＋定回路１７．抵抗測定回路１８及び容量測定
回路１９はそれぞれ放電回路のインダクタンス成分、抵
抗成分及び容量成分を測定してその測定結果を特性判断
部２１に送る。Next, a case will be described in which the workpiece 10 is changed from the above state to a high resistance material on the order of 10-1 to 100 ohms, for example, ceramic, and electrical discharge machining is performed. In this state, inductance ilF + constant circuit 17. The resistance measuring circuit 18 and the capacitance measuring circuit 19 measure the inductance component, resistance component, and capacitance component of the discharge circuit, respectively, and send the measurement results to the characteristic determining section 21.
この特性判断部２１は各測定結果を受けてＲ８と２ｆ「
「７ｆ丁とを比較して放電回路の特性が振動か減衰かを
判断する。この場合、被加工物１０が高抵抗であるので
Ｒｏよりも２ Ｌｏ／Ｃｏが大きくなって減衰回路と
判断される。しかるに、特性判断部２１はＲＯと２ｆ「
「７ｆ丁との偏差に応じた可変コイルＬａの可変量及び
コンデンサ０１〜Ｓ ｎの接続数を求める。具体的に特
性判断部２１はインダクタンス成分を大きくするととも
に容量成分を小さくする調整信号を調整駆動部２２に送
出する。かくして、可変コイルＬａはそのインダクタン
スが大きく設定されるとともに容量の大きなコンデンサ
Ｃ２〜Ｓｎ例えばＣ２のスイッチＳ１が閉じられる。な
お、このとき、スイッチＳ。は開放される。この結果、
放電回路は、高抵抗が接続されたのにかかわらず減衰回
路にならずに振動回路の特性に設定される。この結果、
直流電圧の印加により被加工物１０とワイヤ電極１１と
の間に放電が発生して、高抵抗の被加工物１０は加工さ
れる。This characteristic judgment section 21 receives each measurement result and determines R8 and 2f'.
7F to determine whether the characteristics of the discharge circuit are vibration or damping. In this case, since the workpiece 10 has a high resistance, 2 Lo/Co is larger than Ro, and it is determined that the circuit is a damping circuit. However, the characteristic judgment unit 21
``The variable amount of the variable coil La and the number of connected capacitors 01 to S n are determined according to the deviation from the 7f block.Specifically, the characteristic judgment unit 21 adjusts the adjustment signal to increase the inductance component and decrease the capacitance component. The inductance of the variable coil La is set to be large, and the switch S1 of the capacitors C2 to Sn, for example C2, having a large capacity is closed.At this time, the switch S is opened. As a result,
The discharge circuit does not become a damping circuit even though a high resistance is connected, but is set to have the characteristics of an oscillating circuit. As a result,
By applying the DC voltage, a discharge is generated between the workpiece 10 and the wire electrode 11, and the high-resistance workpiece 10 is machined.
このように上記一実施例においては、放電回路のインダ
クタンス成分、抵抗成分及び容量成分を１１ＦＩ定して
放電回路の特性を判断し、この判断の結果により放電回
路の特性が減衰であれば安定化スタック回路１４の各素
子を選択及び可変して放電回路の特性を振動に設定する
ようにしたので、被加工物１０の抵抗値に応じて放電回
路の回路定数が設定できて常に放電回路の特性を振動回
路に設定できる。従って、抵抗値が１０−５〜ｌ０−４
Ω国オーダの金属は勿論のこと高抵抗１０−１〜１００
Ω（１のセラミック等の被加工物１０も加工することが
できる。In this way, in the above embodiment, the characteristics of the discharge circuit are determined by determining the inductance component, resistance component, and capacitance component of the discharge circuit by 11 FI, and if the characteristics of the discharge circuit are attenuated based on the result of this determination, the characteristics of the discharge circuit are stabilized. Since the characteristics of the discharge circuit are set to vibration by selecting and varying each element of the stack circuit 14, the circuit constant of the discharge circuit can be set according to the resistance value of the workpiece 10, and the characteristics of the discharge circuit are always maintained. can be set in the vibration circuit. Therefore, the resistance value is 10-5 to l0-4
High resistance 10-1 to 100 as well as metals on the order of Ω
It is also possible to process a workpiece 10 such as a ceramic of Ω(1).
なお、本発明は上記一実施例に限定されるものでなくそ
の主旨を逸脱しない範囲で変形してもよい。例えば、安
定スタック回路１４は上記一実施例の構成ではなく放電
回路のインダクタンス成分や抵抗成分、容量成分を変更
する回路であれば如何なる構成であってもよい。又、上
記一実施例ではワイヤ放電加工に適用した場合について
説明したが、ワイヤ放電加工に限らず電解放電加工や形
彫り放電加工にも適用できる。Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof. For example, the stable stack circuit 14 does not have the configuration of the above embodiment, but may have any configuration as long as it is a circuit that changes the inductance component, resistance component, and capacitance component of the discharge circuit. Further, in the above embodiment, a case where the present invention is applied to wire electrical discharge machining has been described, but the present invention is not limited to wire electrical discharge machining, but can also be applied to electrolytic electrical discharge machining and die-sinking electrical discharge machining.
［発明の効果］
以上詳記したように本発明によれば、通常の放電加工ば
かりでなく高抵抗の被加工物でも効率良く放電加工がで
きる放電加工装置を提供できる。[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide an electric discharge machining apparatus that can efficiently perform electric discharge machining not only on ordinary electric discharge machining but also on high-resistance workpieces.
第１図及び第２図は本発明に係わる放電加工装置の一実
施例を説明するための図であって、第１図は構成図、第
２図は等価回路図、第３図乃至第５図は従来技術を説明
するための図である。
１０・・・被加工物、１１・・・ワイヤ電極、１２・・
・直流電源、１３・・・リード線、１４・・・安定スタ
ック回路、１６・・・回路定数測定手段、１７・・・イ
ンダクタンス測定回路、１８・・・抵抗／ｌ−１定回路
、１９・・・容量ＡＰＩ定回路、２０・・・特性調整手
段、２１・・・特性判断部、２２・・・調整駆動部、Ｌ
ａ・・・可変コイル、Ｒａ・・・可変抵抗、０１〜Ｃｎ
・・・コンデンサ、ＳＯ〜Ｓｎ・・・スイッチ、Ｒ・・
・リード線抵抗、Ｌ・・・リード線インダクタンス、「
１・・・電極の接触抵抗、ｒ２・・・放電ギャップ抵抗
、Ｃｇ・・・放電ギャップ容量、Ｒａ・・・被加工物抵
抗。
出願人代理人 弁理士 鈴江武彦
しｎ
第
図
第
図1 and 2 are diagrams for explaining one embodiment of the electrical discharge machining apparatus according to the present invention, in which FIG. 1 is a configuration diagram, FIG. 2 is an equivalent circuit diagram, and FIGS. The figure is a diagram for explaining the prior art. 10... Workpiece, 11... Wire electrode, 12...
- DC power supply, 13... Lead wire, 14... Stable stack circuit, 16... Circuit constant measuring means, 17... Inductance measuring circuit, 18... Resistance/l-1 constant circuit, 19. ...Capacitance API constant circuit, 20...Characteristic adjustment means, 21...Characteristic judgment section, 22...Adjustment drive section, L
a...Variable coil, Ra...Variable resistance, 01~Cn
...Capacitor, SO~Sn...Switch, R...
・Lead wire resistance, L...Lead wire inductance,
1... Electrode contact resistance, r2... Discharge gap resistance, Cg... Discharge gap capacity, Ra... Workpiece resistance. Applicant's agent Patent attorney Takehiko Suzue
Claims (1)
物を加工する放電加工装置において、前記主電極及び前
記被加工物などで形成される放電回路のインダクタンス
成分、抵抗成分及び容量成分を測定する回路定数測定手
段と、前記放電回路に接続されインダクタンス及び容量
等の各素子から成る安定化スタック回路と、前記回路定
数測定手段の測定結果から前記放電回路の特性を判断し
、この判断の結果特性が減衰であれば前記安定化スタッ
ク回路の各素子を選択及び可変して前記放電回路の特性
を振動に調整する特性調整手段とを具備したことを特徴
とする放電加工装置。In an electrical discharge machining device that generates electrical discharge between a main electrode and a workpiece to machine the workpiece, the inductance component, resistance component, and capacitance of a discharge circuit formed by the main electrode, the workpiece, etc. a stabilizing stack circuit connected to the discharge circuit and consisting of elements such as inductance and capacitance, and determining the characteristics of the discharge circuit from the measurement results of the circuit constant measurement means; An electrical discharge machining apparatus characterized by comprising: characteristic adjusting means for selecting and varying each element of the stabilizing stack circuit to adjust the characteristic of the discharge circuit to vibration if the characteristic is attenuation as a result of the determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48689A JPH02185315A (en) | 1989-01-06 | 1989-01-06 | Electric discharge machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48689A JPH02185315A (en) | 1989-01-06 | 1989-01-06 | Electric discharge machining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02185315A true JPH02185315A (en) | 1990-07-19 |
Family
ID=11475100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48689A Pending JPH02185315A (en) | 1989-01-06 | 1989-01-06 | Electric discharge machining device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02185315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5585014A (en) * | 1993-06-30 | 1996-12-17 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for electrical discharge machining using variable capacitance and variable inductance |
| JP2010194693A (en) * | 2009-02-27 | 2010-09-09 | Fanuc Ltd | Wire electric discharge machine |
-
1989
- 1989-01-06 JP JP48689A patent/JPH02185315A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5585014A (en) * | 1993-06-30 | 1996-12-17 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for electrical discharge machining using variable capacitance and variable inductance |
| JP2010194693A (en) * | 2009-02-27 | 2010-09-09 | Fanuc Ltd | Wire electric discharge machine |
| JP4580022B2 (en) * | 2009-02-27 | 2010-11-10 | ファナック株式会社 | Wire electric discharge machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4518844A (en) | Short-circuit MIG welding | |
| CN1515018A (en) | Plasma processor | |
| EP2494372A1 (en) | Device and method for testing internal resistance of battery pack | |
| KR930017296A (en) | Electrically Tuned Matching Network Using Predictor-Modifier Control System | |
| JPH02185315A (en) | Electric discharge machining device | |
| JP3419356B2 (en) | Polarization treatment method for piezoelectric body | |
| US7038158B2 (en) | Wire electrical discharge machining apparatus | |
| WO2000042691A1 (en) | Method and device for charging accumulators | |
| TW591674B (en) | Method of processing a ceramic capacitor | |
| JPS60135127A (en) | Positioning device of electric discharge machining unit | |
| JP2000228337A (en) | Quality determining method for capacitor | |
| US6521166B1 (en) | Method of polarization-treating piezoelectric body | |
| JPH11347842A (en) | Electric discharge machining method and device | |
| US6392183B1 (en) | Process and device for machining by electroerosion | |
| JP3174195B2 (en) | Method for measuring the resistance of chip-type electronic components | |
| US6222149B1 (en) | Power supply device for electric discharge machining apparatus | |
| JPS6348655B2 (en) | ||
| JP2020092331A (en) | Power supply controller | |
| JP2002316040A (en) | Plasma processing method and device | |
| US6204638B1 (en) | Method for charging capacitor | |
| JPH10138048A (en) | Electric discharge machining method | |
| US20220252649A1 (en) | Method And Generator For Characterizing An Oscillatory System | |
| JPH02185314A (en) | Electric discharge machining | |
| JPH0587868A (en) | Electric current/voltage test for voltage nonlinear ersistor body | |
| RU2189892C2 (en) | Method of and device for forming external volt-ampere characteristic of dc welding generator |