JPS62173142A - Machining time estimator for electric discharge machining - Google Patents

Machining time estimator for electric discharge machining

Info

Publication number
JPS62173142A
JPS62173142A JP61014519A JP1451986A JPS62173142A JP S62173142 A JPS62173142 A JP S62173142A JP 61014519 A JP61014519 A JP 61014519A JP 1451986 A JP1451986 A JP 1451986A JP S62173142 A JPS62173142 A JP S62173142A
Authority
JP
Japan
Prior art keywords
machining
time
electrical
section
current density
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.)
Granted
Application number
JP61014519A
Other languages
Japanese (ja)
Other versions
JPH0549415B2 (en
Inventor
Masahito Hashimoto
橋本　正仁
Nobuhiro Yoshioka
伸宏 吉岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP61014519A priority Critical patent/JPS62173142A/en
Publication of JPS62173142A publication Critical patent/JPS62173142A/en
Publication of JPH0549415B2 publication Critical patent/JPH0549415B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
    • 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
    • B23H7/20—Electric circuits specially adapted therefor, e.g. power supply for programme-control, e.g. adaptive
    • 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
    • B23H7/02—Wire-cutting
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31407—Machining, work, process finish time estimation, calculation
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31412—Calculate machining time, update as function of load, speed
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45221—Edm, electrical discharge machining, electroerosion, ecm, chemical

Abstract

PURPOSE:To improve the extent of estimating accuracy in machining time, by storing all data necessary to estimate an erosion rate in electric discharge machining from each machining form in advance, and estimating the time required for machining the specified form while referring to the stored contents. CONSTITUTION:Form data such as a projected area and a side area of a machining part, volume, machining depth, electrode size reduced value, surface roughness, etc., are inputted from a work part drawing at a form data input part 1, and machining time is outputted while referring to the stored contents of a data memory part 2 for time estimation, by way of a process at a time estimating processing part 3. This time estimating processing part 3 is provided with a machining form judging part judging a machining form from the form data inputted, an electric condition series selection part selecting an electric condition series to be used for electric discharge machining, a removal amount calculating part calculating a removal amount from electric conditions and form data, a current density calculating part calculating current density at every electric condition and an erosion rate calculating part.

Description

【発明の詳細な説明】 （技術分野） 本発明は放電加工用の加工時間見積り装置に関するもの
であり、更に詳しくは、放電加工される加工部の形状デ
ータに基づいて放電加工に要する時間を見積もるように
した放電加工用の加工時間見積り装置に関するものであ
る。Detailed Description of the Invention (Technical Field) The present invention relates to a machining time estimating device for electric discharge machining, and more specifically, it estimates the time required for electric discharge machining based on shape data of a machined part to be subjected to electric discharge machining. The present invention relates to a machining time estimating device for electrical discharge machining.

（背景技術） 放電加工においては、加工中に除去された部分のチップ
が加工部に滞留し、そのままでは加工が不安定になるた
めに、放電加工機の制御装置の側での種々の条件を操作
して加工を安定に行い得るようにしている。従って放電
加工機においては、マシニングセンターのように指定さ
れた送り速度、加工速度が実現されるというわけではな
く、加工形態や加工状態によって加工の進行速度が変動
するものである。このように加工速度が他の条件に従属
的である為に、放電加工に要する時間を予測することは
困難とされていた。(Background technology) In electric discharge machining, chips removed during machining remain in the machining area, and machining becomes unstable if left as is. Therefore, various conditions must be adjusted on the control device side of the electric discharge machine. It is operated to ensure stable machining. Therefore, in electric discharge machines, unlike machining centers, specified feed speeds and machining speeds are not achieved, but the progress speed of machining varies depending on the machining form and machining conditions. Since the machining speed is dependent on other conditions, it has been difficult to predict the time required for electrical discharge machining.

このため、従来は放電加工の時間を加工前に予測可能な
システムは提案されておらず、高度の熟練技能者による
時間見積りを行ったり、過去の加工時間データを蓄積し
、それに基づいて時間予測を行うという方法がとられて
いた。しかしながら、加工形態等が毎回変わるために、
人間の勘に頼っていると予測が大きく狂ったり、見積り
に時間がかかるという問題があり、そのために放電加工
の工程は生産計画を立てる際の不確定な要素になりやす
いという問題があった。For this reason, no system has been proposed in the past that can predict the time required for electrical discharge machining before machining. Instead, highly skilled technicians estimate the time, accumulate past machining time data, and predict the time based on that. The method was to do this. However, since the processing form etc. changes every time,
Relying on human intuition has the problem that predictions can be greatly incorrect and that it takes time to make estimates, and as a result, the electrical discharge machining process tends to become an uncertain element when formulating production plans.

（発明の目的） 本発明は上述のような点に鑑みてなされたものであり、
その目的とするところは、放電加工時間を予め精度良く
予測できるようにした放電加工用の加工時間見積り装置
を提供するにある。(Object of the invention) The present invention has been made in view of the above points,
The purpose is to provide a machining time estimating device for electric discharge machining that can predict electric discharge machining time in advance with high accuracy.

（発明の開示） 本発明に係る放電加工用の加工時間見積り装置にあって
は、第１図に示すように、放電加工される加工部の形状
データを入力される形状データ入力部１と、放電加工の
加工速度を加工形状のデータから見積もるのに必要な複
数のデータを予め記憶する時間見積り用のデータ記憶部
２と、形状データ入力部１にて入力された加工部の形状
データと、データ記憶部２に記憶された時間見積り用の
データとから放電加工時間を見積もる時間見積り処理部
３とを含むものである。(Disclosure of the Invention) As shown in FIG. 1, the machining time estimating device for electric discharge machining according to the present invention includes a shape data input section 1 into which shape data of a machined part to be subjected to electric discharge machining is input; a data storage unit 2 for time estimation that stores in advance a plurality of data necessary for estimating the machining speed of electric discharge machining from data of the machining shape; and shape data of the machined part inputted in the shape data input unit 1; It includes a time estimation processing section 3 that estimates the electrical discharge machining time from the time estimation data stored in the data storage section 2.

本発明にあっては、このように、放電加工の加工速度を
加工形状のデータから見積もるのに必要な複数のデータ
を予め記憶しておくデータ記憶部２を設けて、その記憶
内容を参照しながら、与えられた加工形状を放電加工す
るのに要する時間を見積り処理するようになっているの
で、加工時間の見積りに作業者の主観が入ることがなく
、したがって、加工時間の見積りを精確に行うことがで
きると共に、加工時間・の見積りに要する労力が大幅に
省力化されるものである。In the present invention, as described above, the data storage unit 2 is provided in which a plurality of pieces of data necessary for estimating the machining speed of electric discharge machining from the machining shape data are stored in advance, and the stored contents are referred to. However, since the time required to perform electric discharge machining on a given machined shape is estimated and processed, the operator's subjectivity is not included in the estimation of machining time, and therefore the estimation of machining time can be made more accurately. In addition, the labor required for estimating machining time can be greatly reduced.

以下、本発明の好ましい実施例を添付図面と共に説明す
る。第１図は本発明の一実施例の概略構成を示すブロッ
ク図である。第１図に示すように、形状データ、入力部
１にて加工部品図面から加工部の投影面積や側面積、体
積、加工深さ、電極減寸値、面粗さ等の形状データを入
力し、時間見積り用のデータ記憶部２の記憶内容を参照
しながら、時間見積り処理部３での処理を経て、加工時
間を出力するものである６時間見積り処理部３における
処理は第２図に示すような過程で進められる。Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. As shown in Figure 1, shape data such as the projected area, lateral area, volume, machining depth, electrode reduction value, surface roughness, etc. of the machined part are input from the machined part drawing in the shape data input section 1. The processing in the 6-hour estimation processing section 3 is shown in FIG. 2, which outputs the machining time through the processing in the time estimation processing section 3 while referring to the stored contents of the data storage section 2 for time estimation. The process can proceed as follows.

まず、加工形態判別部（イ）での加工形態の判別は、第
４図に示すような複数の加工形態をデータ記憶部２に予
め登録しておき、形状データが入力されると、その内容
を読み込んでそれに対応する加工形態を選び出して判別
する。そして加工形態が決まると、第７図に示すような
実験的に求められた各加工形態ごとの加工速度曲線（ａ
、ｂ、ｃ等）より、その加工形態に応じたタイプの加工
速度の数式を選び出す０次に、電気条件列選択部（ロ）
では電極減寸値と面粗さとが指定きれると、データ記憶
部２に予め登録された加工開始から加工終了までの電気
条件の組み合わせが決定される。各電気条件は、条件コ
ードＣ，，（，２，・・・、ＣＳ、・・・等で表される
。First, the machining style discrimination section (a) determines the machining style by registering a plurality of machining styles in the data storage unit 2 in advance as shown in FIG. is read and the corresponding processing form is selected and discriminated. Once the machining form is determined, the machining speed curve (a
, b, c, etc.) to select the type of machining speed formula according to the machining form.
Once the electrode reduction value and surface roughness have been specified, a combination of electrical conditions from the start of machining to the end of machining, registered in advance in the data storage section 2, is determined. Each electrical condition is represented by a condition code C, (,2,..., CS,..., etc.).

このうち、例えば条件コードＣ＋はパルス電流１Ｐ＝１
０、通電時間τｏｎ＝６、通電休止時間τｏｆｆ＝５、
・・・等の内容の電気条件を表し、条件コードＣ２は、
１Ｐ＝７、ｖａｎ＝６、ｚ−ｏｆｆ＝４、・・・等の内
容の電気条件を表す、というように予めデータ記憶部２
に登録されている。加工除去量算出部（ハ）では、各電
気条件ごとに予めデータ記憶部２に登録されている放電
ギャップ、設定面粗さ、電極送り量の値をデータ記憶部
２から呼び出し、すでに入力されている投影面積及び側
面積の値より、正味加工体積が算出される。第５図に種
々の電気条件Ｃ＋　、　Ｃ２）・・・、　Ｃｓ　、・・
・についての正味加工体積を例示する。尚、ここで用い
ている投影面積、側面積とは第３図（ａ）（ｂ）に示さ
れるように、それぞれ放電加工の進行方向に対して垂直
な面積、平行な面積のことを指す。電流密度算出部（ニ
）でも同様に、電気条件ごとに予めデータ記憶部２に登
録されている設定最大電流値より平均加工電流を計算し
、入力された投影面積で除して電流密度を算出する。加
工速度算出部（ホ）では予め実験的に求めた各電気条件
毎の電流密度に対する加工速度特性を数式化し、その係
数を予めデータ記憶部２に登録しておき、決定された電
気条件に対応する係数と、電流密度算出部〈二）で算出
した電流密度の値を元の数式に代入して、その電気条件
における加工速度を算出する６種々の電気条件Ｃ＋　、
　Ｃ２）・・・。Among these, for example, condition code C+ is pulse current 1P=1
0, energization time τon=6, energization off time τoff=5,
The condition code C2 represents the electrical conditions such as...
1P = 7, van = 6, z-off = 4, etc.
is registered in. The machining removal amount calculation unit (c) reads the values of the discharge gap, set surface roughness, and electrode feed amount that are registered in advance in the data storage unit 2 for each electrical condition from the data storage unit 2, and calculates the values that have already been input. The net machining volume is calculated from the projected area and lateral area values. Figure 5 shows various electrical conditions C+, C2)..., Cs,...
・Illustrate the net machining volume for . Note that the projected area and lateral area used here refer to the area perpendicular to and parallel to the direction of progress of electrical discharge machining, respectively, as shown in FIGS. 3(a) and 3(b). Similarly, the current density calculation unit (d) calculates the average machining current from the set maximum current value registered in advance in the data storage unit 2 for each electrical condition, and divides it by the input projected area to calculate the current density. do. The machining speed calculation unit (e) formulates the machining speed characteristics for the current density for each electrical condition, which have been experimentally determined in advance, and registers the coefficients in the data storage unit 2 in advance to correspond to the determined electrical conditions. 6 various electrical conditions C+, which calculates the machining speed under the electrical conditions by substituting the coefficient and the value of the current density calculated by the current density calculation unit (2) into the original formula.
C2)...

Ｃｓ　、・・・における電流密度に対する加工速度特性
の例を第６図に示す、加工時間算出部（へ）では、加工
開始時の場合は形状データとして入力されている体積を
、それ以外の場合は加工除去量算出部（ハ）で求めた正
味加工体積を、それぞれ加工速度算出部（ホ）で算出さ
れた加工速度の値で除して加工時間を算出する。以上の
ような過程で加工時間の計算処理を行ない、加工時間を
見積もるものである。Fig. 6 shows an example of machining speed characteristics with respect to current density in Cs,... In the machining time calculation section (to), the volume input as shape data is used at the start of machining, and the volume input as shape data is used at other times. The machining time is calculated by dividing the net machining volume determined by the machining removal amount calculation unit (c) by the machining speed value calculated by the machining speed calculation unit (e). The machining time is calculated through the process described above, and the machining time is estimated.

（発明の効果） 本発明は上述のように、放電加工の加工速度を加工形状
のデータから見積もるのに必要な複数のデータを予め記
憶しておくデータ記憶部を設けて、その記憶内容を参照
しながら、与えられた加工形状を放電加工するのに要す
る時間を見積り処理するようになっているので、加工時
間の見積りに作業者の主観が入ることがなく、したがっ
て、加工時間の見積りを精確に行うことができ、生産計
画の精度が従来より良くなるという効果があり、また、
加工時間の見積りに要する労力が大幅に省力化されるの
で、見積りに要する時間が従来よりも速くなるという効
果がある。(Effects of the Invention) As described above, the present invention provides a data storage section that stores in advance a plurality of data necessary for estimating the machining speed of electric discharge machining from data of the machining shape, and refers to the stored contents. However, since the time required to perform electric discharge machining on a given machining shape is estimated and processed, the operator's subjectivity is not included in the machining time estimate, and therefore the machining time estimate is accurate. This has the effect of improving the accuracy of production planning than before, and
Since the labor required for estimating machining time is greatly reduced, the time required for estimating is faster than before.

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

第１図は本発明の一実８＆例の概略構成を示すブロック
図、第２図は同上の実施例における時間見積り処理部の
動作を示すフローチャート、第３図（ａ）（ｂ）は放電
加工中の状態を示す縦断面図及び横断面図、第４図は加
工形態の代表例を示す説明図、第５図は正味加工体積を
説明するための説明図、第６図は電気条件別の電流密度
と加工速度の関係を示す図、第７図は加工形態別の加工
時間と加工深さの関係を示す図である。 １は形状データ入力部、２はデータ記憶部、３は時間見
積り処理部である。Fig. 1 is a block diagram showing a schematic configuration of the embodiment 8 & example of the present invention, Fig. 2 is a flowchart showing the operation of the time estimation processing section in the same embodiment, and Figs. 3 (a) and (b) are electrical discharge machining. Fig. 4 is an explanatory drawing showing typical examples of machining forms, Fig. 5 is an explanatory drawing for explaining the net machining volume, and Fig. 6 is an explanatory drawing for explaining the net machining volume. FIG. 7 is a diagram showing the relationship between current density and machining speed, and FIG. 7 is a diagram showing the relationship between machining time and machining depth for each type of machining. 1 is a shape data input section, 2 is a data storage section, and 3 is a time estimation processing section.

Claims (2)

【特許請求の範囲】[Claims] （１）放電加工される加工部の形状データを入力される
形状データ入力部と、放電加工の加工速度を加工形状の
データから見積もるのに必要な複数のデータを予め記憶
する時間見積り用のデータ記憶部と、形状データ入力部
にて入力された加工部の形状データと、データ記憶部に
記憶された時間見積り用のデータとから放電加工時間を
見積もる時間見積り処理部とを含むことを特徴とする放
電加工用の加工時間見積り装置。(1) A shape data input section into which the shape data of the machined part to be subjected to electrical discharge machining is input, and data for time estimation that stores in advance multiple pieces of data necessary to estimate the machining speed of electrical discharge machining from the data of the machined shape. It is characterized by comprising a storage section, and a time estimation processing section that estimates electrical discharge machining time from the shape data of the machining part inputted in the shape data input section and the time estimation data stored in the data storage section. Machining time estimation device for electrical discharge machining. （２）特許請求の範囲第１項記載の装置において時間見
積り処理部は、前記形状データ入力部にて入力された形
状データより加工の形態を判別する加工形態判別部と、
放電加工に使用される電気条件列を選択する電気条件列
選択部と、前記電気条件列選択部にて選択された電気条
件及び前記形状データ入力部にて入力された形状データ
から加工除去量を算出する加工除去量算出部と、前記電
気条件列選択部にて選択された各電気条件毎の電流密度
を算出する電流密度算出部と、前記電気条件列選択部に
て選択された電気条件及び前記電流密度算出部にて算出
された電流密度から加工速度を算出する加工速度算出部
とを含むことを特徴とする放電加工用の加工時間見積り
装置。(2) In the apparatus according to claim 1, the time estimation processing unit includes a machining form determining unit that determines a machining form from the shape data inputted at the shape data input unit;
An electrical condition string selection section that selects an electrical condition string to be used in electrical discharge machining, and an electrical condition string selection section that selects an electrical condition string used for electric discharge machining, and calculates the machining removal amount from the electrical conditions selected in the electrical condition string selection section and the shape data input in the shape data input section. A processing removal amount calculation unit that calculates the amount of machining removed; a current density calculation unit that calculates the current density for each electrical condition selected in the electrical condition sequence selection unit; and a current density calculation unit that calculates the current density for each electrical condition selected in the electrical condition sequence selection unit; A machining time estimating device for electrical discharge machining, comprising: a machining speed calculation section that calculates a machining speed from the current density calculated by the current density calculation section.
JP61014519A 1986-01-25 1986-01-25 Machining time estimator for electric discharge machining Granted JPS62173142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61014519A JPS62173142A (en) 1986-01-25 1986-01-25 Machining time estimator for electric discharge machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61014519A JPS62173142A (en) 1986-01-25 1986-01-25 Machining time estimator for electric discharge machining

Publications (2)

Publication Number Publication Date
JPS62173142A true JPS62173142A (en) 1987-07-30
JPH0549415B2 JPH0549415B2 (en) 1993-07-26

Family

ID=11863344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61014519A Granted JPS62173142A (en) 1986-01-25 1986-01-25 Machining time estimator for electric discharge machining

Country Status (1)

Country Link
JP (1) JPS62173142A (en)

Cited By (6)

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US4980532A (en) * 1988-10-04 1990-12-25 Mitsubishi Denki Kabushiki Kaisha Machining time estimating device for electric discharge machining operation
EP0623860A4 (en) * 1992-10-26 1996-07-31 Fanuc Ltd Processing finish time predicting numerical control apparatus.
EP0649698A4 (en) * 1993-05-10 1996-08-07 Fanuc Ltd Apparatus for electric discharge machining.
WO2004103625A1 (en) * 2003-05-20 2004-12-02 Mitsubishi Denki Kabushiki Kaisha Electric discharge machine
JP2005279847A (en) * 2004-03-30 2005-10-13 Sodick Co Ltd Die sinking method and die sinking electric discharge machine
WO2011151905A1 (en) * 2010-06-02 2011-12-08 三菱電機株式会社 Electrodischarge machining apparatus

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JP5763285B1 (en) 2013-09-03 2015-08-12 オリンパス株式会社 Optical measuring device

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JPS58171241A (en) * 1982-03-30 1983-10-07 Yamazaki Mazak Corp Display control method for numerical controller

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JPS58171241A (en) * 1982-03-30 1983-10-07 Yamazaki Mazak Corp Display control method for numerical controller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4980532A (en) * 1988-10-04 1990-12-25 Mitsubishi Denki Kabushiki Kaisha Machining time estimating device for electric discharge machining operation
EP0623860A4 (en) * 1992-10-26 1996-07-31 Fanuc Ltd Processing finish time predicting numerical control apparatus.
EP0649698A4 (en) * 1993-05-10 1996-08-07 Fanuc Ltd Apparatus for electric discharge machining.
WO2004103625A1 (en) * 2003-05-20 2004-12-02 Mitsubishi Denki Kabushiki Kaisha Electric discharge machine
US7259347B2 (en) 2003-05-20 2007-08-21 Mitsubishi Denki Kabushiki Kaisha Electric discharge machine that calculates and displays the machining time
DE10393400B4 (en) * 2003-05-20 2009-02-26 Mitsubishi Denki K.K. Electric discharge device
JP2005279847A (en) * 2004-03-30 2005-10-13 Sodick Co Ltd Die sinking method and die sinking electric discharge machine
WO2005099951A1 (en) * 2004-03-30 2005-10-27 Sodick Co., Ltd. Method and apparatus for profile electrical discharge machining
US7598470B2 (en) 2004-03-30 2009-10-06 Sodick Co., Ltd. Sinker electric discharge machining method and apparatus
WO2011151905A1 (en) * 2010-06-02 2011-12-08 三菱電機株式会社 Electrodischarge machining apparatus
JP5279954B2 (en) * 2010-06-02 2013-09-04 三菱電機株式会社 EDM machine

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