JPH04226832A - Electric discharge machining device - Google Patents
Electric discharge machining deviceInfo
- Publication number
- JPH04226832A JPH04226832A JP9663991A JP9663991A JPH04226832A JP H04226832 A JPH04226832 A JP H04226832A JP 9663991 A JP9663991 A JP 9663991A JP 9663991 A JP9663991 A JP 9663991A JP H04226832 A JPH04226832 A JP H04226832A
- Authority
- JP
- Japan
- Prior art keywords
- block
- workpiece
- machining
- stage
- discharge
- 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
Links
- 238000003754 machining Methods 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 claims description 19
- 238000009760 electrical discharge machining Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は放電加工により被加工物
を細く、外形が円形となるように加工する放電加工装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric discharge machining apparatus for machining a workpiece by electrical discharge machining so that the workpiece is made thin and has a circular outer shape.
【０００２】0002
【従来の技術】従来、被加工物を細く、外形が円形とな
るように加工するには、旋盤加工手段、或は研削加工手
段と、放電加工手段が用いられている。2. Description of the Related Art Conventionally, lathe processing means, grinding processing means, and electrical discharge machining means have been used to machine a workpiece into a thin, circular outer shape.
【０００３】0003
【発明が解決しようとする課題】しかしながら前者にお
いては被加工物の加工径が細く、特に１ｍｍ以下になる
と、図５に示す如く工具１０１が被加工物１０２に与え
る切削力により被加工物１０２に曲げＤが生じ、径精度
、軸方向の円形度共に満足すべき加工を行うことができ
なかった。However, in the former case, when the diameter of the workpiece is small, especially less than 1 mm, the cutting force applied by the tool 101 to the workpiece 102 causes damage to the workpiece 102, as shown in FIG. Bending D occurred, and it was not possible to perform processing with satisfactory radial accuracy and circularity in the axial direction.
【０００４】一方、後者においては図６に示すように被
加工物１０３を一方の電極とし、ブロック１０４を他方
の電極とした逆極性を用いて放電加工を行うものである
。これによれば上記機械加工とは異なり、被加工物１０
３に直接、切削力を与えないので、被加工物１０３が細
い場合には有効な手段である。しかしながら逆極性の放
電加工においては被加工物１０３のみが減少するもので
はなく、対向して放電するブロック１０４もやはり割合
は少ないが減少する。そのため径方向の加工においては
ブロック１０４、或は被加工物１０３の移動量と被加工
物１０３の減少量が一対一に対応せず、加工の都度、減
少量を測定する必要があり、作業が繁雑となったり、或
は径方向の寸法精度の高いものを得難かった。On the other hand, in the latter case, electric discharge machining is performed using reverse polarity, with the workpiece 103 used as one electrode and the block 104 used as the other electrode, as shown in FIG. According to this, unlike the above-mentioned machining, the workpiece 10
This method is effective when the workpiece 103 is thin because it does not directly apply cutting force to the workpiece 103. However, in reverse polarity electrical discharge machining, not only the workpiece 103 is reduced, but also the block 104 that is electrically discharged oppositely is also reduced, although the proportion is small. Therefore, in radial machining, the amount of movement of the block 104 or workpiece 103 and the amount of decrease in the workpiece 103 do not correspond one-to-one, and it is necessary to measure the amount of decrease each time machining is performed, making the work more difficult. It became complicated, or it was difficult to obtain one with high dimensional accuracy in the radial direction.
【０００５】そこで、本発明は、細径の被加工物を径精
度と軸方向の円形度共に良好に加工することができるよ
うにした放電加工装置を提供しようとするものである。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electric discharge machining apparatus that can machine a small-diameter workpiece with good radial accuracy and axial circularity.
【０００６】[0006]
【課題を解決するための手段】そして上記問題点を解決
するための本発明の技術的な手段は、導電性材料よりな
る被加工物を保持する加工電極と、この加工電極を回転
させる回転手段と、上記加工電極を垂直な軸方向に移動
させる移動手段と、上記加工電極の位置を読み取る手段
と、上記被加工物と互いに放電を行うブロックと、この
ブロックを支持する加工槽と、この加工槽内のブロック
を浸す加工液と、上記加工槽を支持し、水平内で直交す
る２方向に移動可能なステージと、このステージの位置
を読み取る手段と、被加工物の加工を検出する手段と、
上記読み取り手段と検出手段の信号により加工電極及び
ステージの移動を制御するコンピュータを具備したもの
である。[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems includes a machining electrode that holds a workpiece made of a conductive material, and a rotating means that rotates the machining electrode. a moving means for moving the machining electrode in a vertical axial direction; a means for reading the position of the machining electrode; a block that generates electrical discharge with the workpiece; a machining tank that supports this block; A machining liquid that immerses the blocks in the tank, a stage that supports the machining tank and is movable horizontally in two orthogonal directions, a means for reading the position of this stage, and a means for detecting machining of the workpiece. ,
The apparatus is equipped with a computer that controls the movement of the processing electrode and stage based on the signals from the reading means and detection means.
【０００７】[0007]
【作用】本発明は上記の構成によりコンピュータの制御
によりステージを移動させてブロックを被加工物の側面
側に位置させ、被加工物とブロックの側面との間で放電
を行わせて被加工物の径方向の寸法を減少させる。その
被加工物の径方向の加工においてはステージをコンピュ
ータの制御により移動させてブロックを被加工物の側面
に位置させ、被加工物側面とブロック側面との放電が開
始した位置Ｘ０よりブロックの移動量ＸＴが減少代Ｘと
等しくなった時点でコンピュータの制御によりステージ
及びブロックの移動を停止させ、放電が終了するまでそ
のままの状態に保持し、径方向の加工を行い、更には放
電終了後、コンピュータの制御によりステージ及びブロ
ックを移動させ、ブロックを被加工物より後退させると
共に後退方向とは直交方向にステージ及びブロックを移
動させ、更にステージ及びブロックを被加工物側へ移動
させ、ブロックの新たな側面と被加工物側面との放電を
生じた位置ＸＳと最初の放電が開始した位置Ｘ０との差
分△Ｘより被加工物の径方向の減少を検出し、目途とし
た減少量Ｘと比較し、△Ｘ≧Ｘの場合には加工終了とし
、△Ｘ＜Ｘの場合には、△Ｘ＝Ｘ−△Ｘを新たな減少代
とし、コンピュータの制御により放電加工動作を反復し
、径方向の加工を行う。[Operation] With the above configuration, the stage is moved under the control of a computer to position the block on the side of the workpiece, and an electrical discharge is caused between the workpiece and the side of the block to remove the workpiece. reduce the radial dimension of. In machining the workpiece in the radial direction, the stage is moved under computer control to position the block on the side of the workpiece, and the block is moved from position X0, where electrical discharge between the workpiece and block sides begins. When the amount XT becomes equal to the reduction amount X, the movement of the stage and block is stopped under computer control, held in that state until the discharge ends, machining is performed in the radial direction, and further, after the end of the discharge, The stage and block are moved under computer control, the block is retreated from the workpiece, the stage and block are moved in a direction perpendicular to the retreat direction, and the stage and block are further moved toward the workpiece to create a new block. The decrease in the radial direction of the workpiece is detected from the difference △X between the position XS where the discharge occurred between the side surface and the side surface of the workpiece and the position X0 where the first discharge started, and compared with the targeted decrease amount X. However, if △X≧X, machining is finished, and if △X< processing.
【０００８】[0008]
【実施例】以下、図面を参照しながら本発明の位置実施
例について詳細に説明する。図１は放電加工装置の斜視
図であり、図２は放電回路としてＲＣ回路を用いた場合
の制御回路のビロックダイヤグラムである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an electrical discharge machining apparatus, and FIG. 2 is a Billock diagram of a control circuit when an RC circuit is used as the electrical discharge circuit.
【０００９】導電性材料よりなる被加工物１は加工電極
２に保持されている。加工電極２は加工ヘッド３の電極
回転手段４と電極移動手段５に連繋されている。而して
被加工物１と加工電極２は電極回転手段４により共に回
転し、電極移動手段５によって垂直方向であるＺ方向に
移動する。この加工電極２の位置は読み取り手段６によ
り読み取る。A workpiece 1 made of a conductive material is held by a processing electrode 2 . The processing electrode 2 is connected to an electrode rotation means 4 and an electrode movement means 5 of the processing head 3. The workpiece 1 and the processing electrode 2 are rotated together by the electrode rotation means 4 and moved in the vertical Z direction by the electrode movement means 5. The position of the processing electrode 2 is read by the reading means 6.
【００１０】一方、ブロック７は加工槽８中の載物台９
上に固定されて加工液（図示省略）に浸され、加工槽８
はステージ１０上に支持され、ステージ１０はステージ
１１上に支持されている。これらステージ１０と１１は
移動手段１２、１３により水平面内で直交するＺ方向で
あるＹ方向とＸ方向にそれぞれ移動することができ、こ
れによりブロック６がＸ方向とＹ方向に移動することが
できる。これらステージ１０、１１の位置は読み取り手
段１４、１５により読み取ることができる。On the other hand, the block 7 is a stage 9 in the processing tank 8.
It is fixed on the top and immersed in machining liquid (not shown).
is supported on a stage 10, and the stage 10 is supported on a stage 11. These stages 10 and 11 can be moved in the Y direction and the X direction, which are orthogonal Z directions in a horizontal plane, by the moving means 12 and 13, and thereby the block 6 can be moved in the X direction and the Y direction. . The positions of these stages 10 and 11 can be read by reading means 14 and 15.
【００１１】加工電極２とブロック７はコンデンサＣ、
充電抵抗Ｒを介して加工電源１６に接続され、この加工
電源１６により加工電極２とブロック７に電圧が印火さ
れ、被加工物１とブロック７の接近により放電加工が行
われる。加工電極２及びブロック７と加工電極１６との
間には被加工物１の加工を検出する手段として放電開始
検出回路１７、短絡検出回路１８及び放電終了検出回路
１９が接続されている。短絡検出回路１８は加工中の被
加工物１とブロック７の短絡を検出し、放電開始検出回
路１７はコンデンサＣに流入する充電電流より被加工物
１とブロック７の間の放電開始を検出し、また放電終了
検出回路１９は充電電流が十分小さくなった場合に放電
終了を検出する。本実施例にあっては、短絡電流レベル
が２００ｍＡ、放電開始電流レベルが０．１ｍＡ、同じ
く放電終了電流レベルが０．１ｍＡに設定されている。
上記電極移動手段５、読み取り手段６、ステージ移動手
段１２、１３、読み取り手段１４、１５、短絡検出回路
１８、放電開始検出回路１７及び放電終了検出回路１９
は入出力ポート２０を介してコンピュータ２１に接続さ
れ、これら検出回路１７、１８、１９の検出信号に基く
コンピュータ１８の指令により電極移動手段５、ステー
ジ移動手段１２、１３が駆動され、加工電極２及びブロ
ック７がそれぞれ設定された所望の動作を行うことがで
きる。The processing electrode 2 and block 7 are connected to a capacitor C,
It is connected to a machining power source 16 via a charging resistor R, and a voltage is applied to the machining electrode 2 and the block 7 by the machining power source 16, and electrical discharge machining is performed when the workpiece 1 and the block 7 approach each other. A discharge start detection circuit 17, a short circuit detection circuit 18, and a discharge end detection circuit 19 are connected between the machining electrode 2 and the block 7 and the machining electrode 16 as means for detecting machining of the workpiece 1. The short circuit detection circuit 18 detects a short circuit between the workpiece 1 and the block 7 during machining, and the discharge start detection circuit 17 detects the start of discharge between the workpiece 1 and the block 7 from the charging current flowing into the capacitor C. Further, the discharge end detection circuit 19 detects the end of discharge when the charging current becomes sufficiently small. In this embodiment, the short circuit current level is set to 200 mA, the discharge start current level is set to 0.1 mA, and the discharge end current level is also set to 0.1 mA. The electrode moving means 5, reading means 6, stage moving means 12, 13, reading means 14, 15, short circuit detection circuit 18, discharge start detection circuit 17, and discharge end detection circuit 19
is connected to a computer 21 via an input/output port 20, and the electrode moving means 5 and stage moving means 12, 13 are driven by instructions from the computer 18 based on detection signals from these detection circuits 17, 18, 19, and the processing electrode 2 and block 7 can each perform the set desired operation.
【００１２】次に被加工物１の径方向の加工動作につい
て説明する。図３に示すように（加工液、加工槽は省略
した）加工電極２及び被加工物１をＸ軸方向（Ｙ軸方向
でもよい。）でブロック７と対向させ、回転手段４によ
り加工電極２及び被加工物１を矢印方向へ回転させると
共にコンピュータ２１の制御によりステージ１１、１０
及び加工槽８をＸ方向へ移動させ、ブロック７を加工電
極２及び被加工物１側へ一定速度で送る。被加工物１と
ブロック７のギャップが縮まると放電により減少加工を
開始する。Next, the processing operation of the workpiece 1 in the radial direction will be explained. As shown in FIG. 3, the machining electrode 2 and the workpiece 1 (the machining fluid and machining tank are omitted) are opposed to the block 7 in the X-axis direction (the Y-axis direction is also acceptable), and the machining electrode 2 is rotated by the rotating means 4. The workpiece 1 is rotated in the direction of the arrow, and stages 11 and 10 are rotated under the control of the computer 21.
Then, the processing tank 8 is moved in the X direction, and the block 7 is sent toward the processing electrode 2 and the workpiece 1 at a constant speed. When the gap between the workpiece 1 and the block 7 is reduced, reduction machining is started by electric discharge.
【００１３】被加工物１とブロック７との間に短絡が生
じた場合には短絡検出回路１８の検出信号とコンピュー
タ２１の制御によりブロック７を後退させながら加工を
行う。 ここで図４に示すように被加工物１の半径方
向の減少代をＸＴとし、放電開始位置のＸ座標をＸ０と
する。ブロック７をＸ０よりＸＴだけ送った時点でブロ
ック７の移動を停止させ、放電が終了するまでこのまま
の状態で保持する。即ち、放電が終了した時点では、本
来、被加工物１の半径はＸＴだけ減少しているはずであ
る。
しかしながら放電が終了した時点では、被加工物１は破
線に示した状態となり、ブロック７も消耗するため、必
ずしも半径がＸＴだけ減少しない。このため放電終了後
にブロック７を上記とは逆のＸ方向へ移動させて被加工
物１より引き離し、コンピュータ２１の指令によりステ
ージ移動手段１２を駆動させ、ステージ１０及び加工槽
８をＹ軸方向移動させ、これによりブロック７をＹ軸方
向Ａ位置よりＢ位置まで移動させ、更にコンピュータ２
１の指令によりステージ移動手段１３を駆動させ、ステ
ージ１１、１０及び加工槽８をＸ軸方向へ移動させ、ブ
ロック７の新しい面を被加工物１側へ移動させ、ブロッ
ク７の新しい面と被加工物１との間で再び放電させる。
この時の放電開始座標をＸＳとすると真の電極半径消耗
量は△Ｘ＝Ｘ０−ＸＳであることが分かる。即ち、ＸＴ
−△Ｘだけまだ被加工物１の半径が大きいから、再度、
ＸＴ＝ＸＴ−△Ｘとし、加工を繰り返し、△Ｘ≧ＸＴと
なった時点で加工を終了すれば、希望の径の被加工物１
を得ることができる。When a short circuit occurs between the workpiece 1 and the block 7, processing is performed while the block 7 is moved backward by the detection signal from the short circuit detection circuit 18 and the control of the computer 21. Here, as shown in FIG. 4, the reduction amount in the radial direction of the workpiece 1 is set as XT, and the X coordinate of the discharge start position is set as X0. When the block 7 has been moved by XT from X0, the movement of the block 7 is stopped, and this state is maintained until the discharge ends. That is, at the time when the discharge ends, the radius of the workpiece 1 should originally have decreased by XT. However, when the discharge ends, the workpiece 1 is in the state shown by the broken line and the block 7 is also worn out, so the radius does not necessarily decrease by XT. For this reason, after the discharge ends, the block 7 is moved in the X direction opposite to that described above to be separated from the workpiece 1, and the stage moving means 12 is driven by a command from the computer 21, and the stage 10 and processing tank 8 are moved in the Y axis direction. This moves the block 7 from the A position to the B position in the Y-axis direction, and further moves the computer 2
1 drives the stage moving means 13, moves the stages 11, 10, and the processing tank 8 in the X-axis direction, moves the new surface of the block 7 toward the workpiece 1, and connects the new surface of the block 7 with the workpiece. Electric discharge is caused again between the workpiece 1 and the workpiece 1. Letting the discharge start coordinate at this time be XS, it can be seen that the true electrode radius consumption is ΔX=X0−XS. That is, XT
Since the radius of workpiece 1 is still large by −△X, again,
If XT = XT - △
can be obtained.
【００１４】本実施例においてはステージ９、１０、の
移動がコンピュータ２１により制御されているため、放
電開始位置、送り込み量は放電開始検出回路１７に信号
によりコンピュータ２１により算出され、自動的にＸＴ
が設定され、△Ｘ≧ＸＴとなるまで加工が進められ、高
精度の径方向の加工が可能となる。In this embodiment, since the movement of the stages 9 and 10 is controlled by the computer 21, the discharge start position and feed amount are calculated by the computer 21 based on signals sent to the discharge start detection circuit 17, and the XT
is set, and machining proceeds until ΔX≧XT, allowing highly accurate radial machining.
【００１５】なお、被加工物１の加工を検出する手段と
しては放電開始検出回路１７の他、短絡検出回路１８と
放電終了検出回路１９とのいずれか一方を備えるように
してもよい。As a means for detecting machining of the workpiece 1, in addition to the discharge start detection circuit 17, either one of a short circuit detection circuit 18 and a discharge end detection circuit 19 may be provided.
【００１６】[0016]
【発明の効果】以上の説明より明らかなように本発明に
よれば、被加工物を保持する加工電極を回転させると共
に軸方向に移動させるようにし、一方、ブロックを支持
した加工槽を水平面内で、直交する２方向に移動させる
ようにし、被加工物の外周を複数段階に分けてブロック
の新たな面と放電させて減少加工することができ、被加
工物の先端に丸みがなく、径方向の寸法精度と軸方向の
円形度共に良好に加工することができる。As is clear from the above description, according to the present invention, the machining electrode that holds the workpiece is rotated and moved in the axial direction, while the machining tank that supports the block is moved in the horizontal plane. By moving the workpiece in two orthogonal directions, the outer periphery of the workpiece can be divided into multiple stages and subjected to electric discharge to a new surface of the block to perform reduction machining. It can be processed with good dimensional accuracy in both directions and circularity in the axial direction.
【図１】本発明の一実施例における放電加工装置の斜視
図FIG. 1 is a perspective view of an electric discharge machining apparatus in an embodiment of the present invention.
【図２】本発明の一実施例における放電加工装置の制御
回路図[Fig. 2] Control circuit diagram of an electric discharge machining apparatus in an embodiment of the present invention
【図３】本発明の一実施例における被加工物の径方向の
加工原理説明図[Fig. 3] Diagram explaining the principle of machining in the radial direction of a workpiece in an embodiment of the present invention
【図４】本発明の一実施例における被加工物の径方向の
加工原理説明のための平面図FIG. 4 is a plan view for explaining the principle of machining the workpiece in the radial direction in an embodiment of the present invention.
【図５】従来の切削加工装置により被加工物の加工を行
う場合の説明図[Figure 5] Explanatory diagram when processing a workpiece using a conventional cutting device
【図６】従来の放電加工装置により被加工物の径方向の
加工を行う場合の説明図[Fig. 6] Explanatory diagram when machining a workpiece in the radial direction using a conventional electrical discharge machining device
１ 被加工物 ２ 加工電極 ４ 電極回転手段 ５ 電極移動手段 ６ 読み取り手段 ７ ブロック ８ 加工槽 １０ ステージ １１ ステージ １２ ステージ移動手段 1 Workpiece 2 Processing electrode 4 Electrode rotation means 5 Electrode moving means 6 Reading means 7 Block 8 Processing tank 10 Stage 11 Stage 12 Stage movement means
Claims (2)
る加工電極と、この加工電極を回転させる回転手段と、
上記加工電極を垂直な軸方向に移動させる移動手段と、
上記加工電極の位置を読み取る手段と、上記被加工物と
互いに放電を行うブロックと、このブロックを支持する
加工槽と、この加工槽内のブロックを浸す加工液と、上
記加工槽を支持し、水平面内で直交する２方向に移動可
能なステージと、このステージの位置を読み取る手段と
、被加工物の加工を検出する手段と、上記読み取り手段
と検出手段の信号により加工電極及びステージの移動を
制御するコンピュータを具備し、ステージをコンピュー
タの制御により移動させてブロックを被加工物の側面に
位置させ、被加工物側面とブロック側面との放電が開始
した位置Ｘ０よりブロックの移動量ＸＴが減少代Ｘと等
しくなった時点で、コンピュータの制御によりステージ
及びブロックの移動を停止させ、放電が終了するまでそ
のままの状態に保持し、径方向の加工を行う放電加工装
置。1. A machining electrode that holds a workpiece made of a conductive material, a rotating means that rotates the machining electrode,
A moving means for moving the processing electrode in a vertical axial direction;
means for reading the position of the machining electrode; a block that mutually discharges electrical discharge with the workpiece; a machining tank that supports the block; a machining fluid that immerses the block in the machining tank; A stage movable in two orthogonal directions within a horizontal plane, a means for reading the position of this stage, a means for detecting processing of the workpiece, and a movement of the processing electrode and the stage based on signals from the reading means and the detection means. A control computer is provided, and the stage is moved under the control of the computer to position the block on the side of the workpiece, and the amount of movement XT of the block decreases from the position X0 where electric discharge between the side of the workpiece and the side of the block starts. An electrical discharge machining device that performs radial machining by stopping the movement of the stage and block under computer control when the distance becomes equal to X, and holding the stage and block in that state until the discharge ends.
移動させてブロックを被加工物の側面に位置させ、被加
工物側面との放電が開始した位置Ｘ０よりブロックの移
動量ＸＴが減少代Ｘと等しくなった時点でコンピュータ
の制御によりステージ及びブロックの移動を停止させ、
放電が終了するまでそのままの状態に保持し、径方向の
加工を行い、放電終了後、コンピュータの制御によりス
テージ及びブロック移動させ、ブロックを被加工物より
後退させると共に後退方向とは直交方向にステージ及び
ブロックを移動させ、更にステージ及びブロックを被加
工物側へ移動させ、ブロックの新たな側面と被加工物と
の放電を生じた位置ＸＳと最初の放電が開始した位置Ｘ
０との差分△Ｘより被加工物の径方向の減少を検出し、
目途とした減少量Ｘと比較し、△Ｘ≧Ｘの場合には加工
終了とし、△Ｘ＜Ｘの場合には、△Ｘ＝Ｘ−△Ｘを新た
な減少代とし、コンピュータの制御により放電加工動作
を反復し、径方向の加工を行う請求項１記載の放電加工
装置。2. The stage is moved under computer control to position the block on the side surface of the workpiece, and the amount of movement XT of the block becomes equal to the reduction amount X from the position X0 where electric discharge with the side surface of the workpiece starts. At that point, the movement of the stage and block is stopped by computer control,
The state is held as it is until the discharge ends, and machining is performed in the radial direction. After the discharge ends, the stage and block are moved under computer control, the block is retreated from the workpiece, and the stage is moved in a direction perpendicular to the retreat direction. and the block are moved, and the stage and block are further moved to the workpiece side, and the position XS where electric discharge occurs between the new side of the block and the workpiece and the position X where the first electric discharge starts
Detect the decrease in the radial direction of the workpiece from the difference △X from 0,
Compare it with the target reduction amount The electrical discharge machining apparatus according to claim 1, wherein the machining operation is repeated to perform machining in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9663991A JPH0785847B2 (en) | 1991-04-26 | 1991-04-26 | Electric discharge machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9663991A JPH0785847B2 (en) | 1991-04-26 | 1991-04-26 | Electric discharge machine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25003184A Division JPS61131826A (en) | 1984-11-27 | 1984-11-27 | Electric-discharge machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04226832A true JPH04226832A (en) | 1992-08-17 |
| JPH0785847B2 JPH0785847B2 (en) | 1995-09-20 |
Family
ID=14170403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9663991A Expired - Fee Related JPH0785847B2 (en) | 1991-04-26 | 1991-04-26 | Electric discharge machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785847B2 (en) |
-
1991
- 1991-04-26 JP JP9663991A patent/JPH0785847B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0785847B2 (en) | 1995-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |