JPS6144533A - Wire-cut electric discharge machining - Google Patents
Wire-cut electric discharge machiningInfo
- Publication number
- JPS6144533A JPS6144533A JP16463784A JP16463784A JPS6144533A JP S6144533 A JPS6144533 A JP S6144533A JP 16463784 A JP16463784 A JP 16463784A JP 16463784 A JP16463784 A JP 16463784A JP S6144533 A JPS6144533 A JP S6144533A
- Authority
- JP
- Japan
- Prior art keywords
- wire electrode
- wire
- short
- discharge machining
- loose
- 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
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
- B23H7/02—Wire-cutting
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】
（産業上の利用分野）
本発明は、ワイヤカット放電加工方法、特にワイヤ電極
を傾斜させた状態のもとで行われるワイヤカット放電加
工方法において、遊離微小加工片の遊離直前に発生する
ワイヤ電極の短絡検出にもとづいて、上記遊離微小加工
片を強制的に排除することにより、ワイヤ電極の短絡発
生による断線を防止するようにしたワイヤカット放電加
工方法に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a wire-cut electrical discharge machining method, particularly a wire-cut electrical discharge machining method performed with a wire electrode tilted. This invention relates to a wire-cut electrical discharge machining method that prevents wire breakage due to short-circuiting of the wire electrode by forcibly removing the loose micro-machined pieces based on detection of a short-circuit in the wire electrode that occurs immediately before the wire electrode is released. .
（従来の技術と問題点）
本願出願人は、ワイヤカット放電加工装置と例えばフラ
イス装置とを組合わせて構成された第２図図示の如き製
造装置を用いて、押出しダイスのベアリング孔および裏
逃げ部の全加工を自動的に行うことにより、製作工数の
大幅な短縮を図り、製作コスートの低減化を可能ならし
めるようにした「押出しダイスおよびその製造方法」を
先に提案（例えば特願昭５３ｉ３２３ｉ９号ンした。な
お、第２図における符号１は被加工体、２は加工テーブ
ル、３および４は制御モータであって上記加工テーブル
を直交するＸＳＹ方向に駆動せしめるもの、５はワイヤ
電極、６はワイヤ電極供給ローラ、７および１０はテン
ション・ローラ、８は上部ガイド、９は下部ガイド、１
１はスクラップ・ローラ、１２および１３は制御モータ
であって上記上部ガイド８を直交するＸ、Ｙ方向に移動
せしめるもの、１４はフライス・ヘッド、１５はフライ
ス・カッタ、１６は制御モータであって上記フライス・
ヘッド１４におけるフライス・カッタ１５の送りを制御
するものを表している。(Prior Art and Problems) The applicant of the present application has developed a method for manufacturing bearing holes and back reliefs of extrusion dies using a manufacturing apparatus as shown in FIG. We first proposed an "extrusion die and its manufacturing method" that made it possible to significantly shorten manufacturing man-hours and reduce manufacturing costs by automatically performing all machining of parts (for example, 53i323i9. In Fig. 2, reference numeral 1 is a workpiece, 2 is a processing table, 3 and 4 are control motors that drive the processing table in orthogonal XSY directions, 5 is a wire electrode, 6 is a wire electrode supply roller, 7 and 10 are tension rollers, 8 is an upper guide, 9 is a lower guide, 1
1 is a scrap roller, 12 and 13 are control motors that move the upper guide 8 in orthogonal X and Y directions, 14 is a milling head, 15 is a milling cutter, and 16 is a control motor. The above milling cutter
It shows what controls the feed of the milling cutter 15 in the head 14.
しかしながら、上記提案の製造方法を用いて、例えば第
３図図示の如く、比較的に曲率半径の小さいアール部（
図示矢１ｌ−１］Ａ、Ｂ、Ｃ）が存在するベアリング孔
１７を有する押出しダイス、或いは第４図図示の如く、
モヘア部１９が存在するベアリング孔１８を有する押出
しダイスの裏逃げ部を加工する際に、押出しダイスの裏
面側において被加工体の一部分の小片（本発明で言うと
ころの遊離微小加工片）が遊離するという非所望な現象
が発生する。当該遊離微小加工片の発生現象を、第５図
に関連して説明する。However, using the above-proposed manufacturing method, for example, as shown in FIG.
An extrusion die having a bearing hole 17 in which arrows 1l-1]A, B, and C) are present, or as shown in FIG.
When processing the back relief part of the extrusion die that has the bearing hole 18 where the mohair part 19 exists, a small piece of a part of the workpiece (a free micro-processed piece as referred to in the present invention) is released on the back side of the extrusion die. An undesirable phenomenon occurs. The phenomenon of generation of the loose micromachined pieces will be explained with reference to FIG.
押出しダイスの裏逃げ部２０を形成するための加工工程
において、第５図（Ａ）図示の如く、ワイヤ電極５は該
裏逃げ部２０を構成する裏逃げ傾斜面２０’ の傾斜角
度に対応する傾斜角度θをもって傾斜した状態のもとで
、所望するベアリング孔２１の各位置におけるベアリン
グ長βの深さ位置Ｐ、点を通過するように移動する。そ
して、上記ワイヤ電極５の傾斜角度θの値如何によって
は、図示の如くワイヤ電極５の通過軌跡が、点０で交差
することがある。第５図（Ｂ）は、上記裏逃げ部２０の
加工工程における切断加工の状態をわかり易くするため
に、ワイヤ電極５による切断加工の軌跡を示す図である
が、上記交点０が被加工体１の上面１−１と下面１−２
との間に存在する場合に、図示の如く下面１−２側に遊
離微小加工片２２が生じる。なお、図中の符号２３は上
記点Ｐ工の軌跡を表している。また、図示矢印ａは上記
被加工体１の上面１−１とワイヤ電極５との交差点Ｐ２
の軌跡の移動方向、図示矢印すは上記被加工体１の下面
１−２とワイヤ電極５との交差点Ｐ３の軌跡の移動方向
を示している。In the processing step for forming the back relief part 20 of the extrusion die, as shown in FIG. Under the state of inclination with the inclination angle θ, it moves so as to pass through the depth position P of the bearing length β at each desired position of the bearing hole 21. Depending on the value of the inclination angle θ of the wire electrode 5, the loci of the wire electrode 5 may intersect at point 0 as shown in the figure. FIG. 5(B) is a diagram showing the locus of the cutting process by the wire electrode 5 in order to make it easier to understand the state of the cutting process in the process of forming the back relief part 20. Top surface 1-1 and bottom surface 1-2
If there is a free micro-machined piece 22 on the lower surface 1-2 side as shown in the figure. Note that the reference numeral 23 in the figure represents the locus of the above-mentioned point P work. Further, the illustrated arrow a indicates the intersection point P2 between the upper surface 1-1 of the workpiece 1 and the wire electrode 5.
The illustrated arrow indicates the direction of movement of the trajectory of the intersection P3 between the lower surface 1-2 of the workpiece 1 and the wire electrode 5.
以上説明した遊離微小加工片は、例えば前述したように
第３図図示の如くアール部Ａ、Ｂ、Ｃをもつベアリング
孔１７を有する押出しダイスの裏逃げ部加工工程におけ
るアール部Ａ、Ｂ、Ｃのそれぞれに対応する位置、或い
は第４図図示の如くモヘア部１９をもつベアリング孔１
８を有する押出しダイスの裏逃げ部加工工程における上
記モヘア部１９に対応する位置において発生する。そし
て、問題は上記遊離微小加工片が遊離する直前の状態に
おいて生じる。即ち、例えば第５図（Ｂ）図示態様にお
いて、加工開始時のワイヤ電極５ （第５図（Ａ）図示
）の位置が点ＰＩ、Ｐｇ、Ｐ３を結ぶ直線上にあるとす
ると、加工の進行に伴って下面１−２上における切断点
は点Ｐ３から図示矢印す方向に移動して行き、当該切断
点が点Ｐ３に接近したとき、遊離微小加工片２２はワイ
ヤ電極５を挟む方向に動くためワイヤ電極５と被加工体
との間に短絡現象が発生する。そのため加工が行われな
くなるばかりでなく、当該短絡現象により上記ワイヤ電
極５が断線するなどの非所望な加工障害が発生するとい
う問題があった。The loose micro-machined pieces described above are, for example, as shown in FIG. or the bearing hole 1 with the mohair portion 19 as shown in FIG.
This occurs at a position corresponding to the mohair portion 19 in the back relief portion processing step of an extrusion die having a diameter of 8. The problem arises in the state immediately before the free micro-machined piece is released. That is, for example, in the embodiment illustrated in FIG. 5(B), if the position of the wire electrode 5 (illustrated in FIG. 5(A)) at the start of machining is on a straight line connecting points PI, Pg, and P3, the progress of machining is Accordingly, the cutting point on the lower surface 1-2 moves from point P3 in the direction indicated by the arrow in the figure, and when the cutting point approaches point P3, the loose micro-worked piece 22 moves in the direction to sandwich the wire electrode 5. Therefore, a short circuit phenomenon occurs between the wire electrode 5 and the workpiece. Therefore, there is a problem in that not only the machining is not performed, but also undesirable machining failures such as the wire electrode 5 being disconnected due to the short circuit phenomenon occur.
（問題点を解決するための手段）
本発明は、上記の如き問題点を解決することを目的とし
ており、そのため本発明のワイヤカット放電加工方法は
、ワイヤ電極を傾斜させた状態のもとで行われるワイヤ
カット放電加工方法において、短絡発生を検出する短絡
検出手段をそなえると共に、遊離微小加工片を強制的に
排除せしめるようにする遊離片排除手段をそなえ、上記
ワイヤ電極と被加工体との間に短絡が生じ、当該短絡が
予め定めた時間持視された時点において上記遊離片排除
手段を作動せしめるようにすることを特徴としている。(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems, and therefore, the wire-cut electric discharge machining method of the present invention is performed under the condition that the wire electrode is inclined. In the wire cut electric discharge machining method to be carried out, a short circuit detection means for detecting the occurrence of a short circuit is provided, and a loose piece removing means is provided for forcibly removing loose micro-machined pieces, and the wire electrode and the workpiece are The present invention is characterized in that the loose piece removing means is activated when a short circuit occurs between the two and the short circuit is observed for a predetermined period of time.
以下図面を参照しつつ説明する。This will be explained below with reference to the drawings.
（発明の実施例）
第１図（Ａ）および（Ｂ）は本発明の一実施例を説明す
るための説明図を示し、図中の符号２４は切断ギャップ
、２５はジェット・ノズル、２６はジェット流を表して
おり、その他の符号は第５図に対応している。(Embodiment of the Invention) FIGS. 1(A) and 1(B) show explanatory diagrams for explaining an embodiment of the present invention, in which reference numeral 24 is a cutting gap, 25 is a jet nozzle, and 26 is a jet nozzle. 5 represents a jet flow, and other symbols correspond to FIG. 5.
本発明の説明に用いた第１図図示実施例は、本願明細書
冒頭において遊離微小加工片２２の発生現象を説明する
ために用いた第５図に対応するものである。そして第１
図（Ｂ）は第１図（Ａ）図示矢印Ａ−Ａ’における底面
図であって、上記遊１ｆｉｔｔ微小加工片２２の遊離直
前の状態を示している。The embodiment shown in FIG. 1 used to explain the present invention corresponds to FIG. 5 used to explain the phenomenon of generation of loose micro-machined pieces 22 at the beginning of this specification. and the first
FIG. 1B is a bottom view taken along the arrow AA' in FIG.
前述した如く、第１図（Ｂ）図示矢印位置Ｐ３を加工開
始位置とすると、ワイヤ電極５は図示矢印す方向に移動
し、該ワイヤ電極５が第１図（Ｂ）に図示されている如
く上記加工開始位置Ｐ、に近接する位置Ｐ４に到達した
とき（このときの図示矢印Δｄは０．０１ｍｍ〜０．５
鰭程度である。）、遊離微小加工片２２が変位し、ワイ
ヤ電極５と被加工体ｌとの間に短絡現象が生じる。この
状態即ち遊離直前においては、上記遊離微小加工片２２
が図示矢印Δｄの部分によって被加工体１と橋絡してい
るに過ぎない。そして、前述した如く上記図示矢印Δｄ
は０．０１ｍｍ〜０．５龍程度であるため、上記遊離微
小加工片２２に適当な外圧を加えることにより、上記橋
絡部分が千切れて遊離微小加工片２２を上記被加工体１
から容易に分離させることができる。本発明は、上記短
絡現象が発生して該短絡現象が所定の時間（例えば５ｍ
５ｅｃないし１ｓｅｃ程度持続された時点において、上
記遊離微小加工片２２に対し本発明に言うところの遊離
片排除手段を用いて外圧を加え、強制的に当該遊離微小
加工片２２を被加工体１から遊離せしめるようにするも
のである。As mentioned above, when the position P3 shown by the arrow in FIG. 1(B) is set as the machining start position, the wire electrode 5 moves in the direction indicated by the arrow in the drawing, and the wire electrode 5 moves as shown in FIG. 1(B). When a position P4 close to the above-mentioned processing start position P is reached (the illustrated arrow Δd at this time is 0.01 mm to 0.5
It is about the size of a fin. ), the free micro-processed piece 22 is displaced, and a short circuit phenomenon occurs between the wire electrode 5 and the workpiece l. In this state, that is, just before the release, the released micro-processed piece 22
is only bridged with the workpiece 1 by the portion indicated by the arrow Δd in the figure. As mentioned above, the illustrated arrow Δd
is approximately 0.01 mm to 0.5 mm, so by applying an appropriate external pressure to the free micro-processed piece 22, the bridging portion is torn and the free micro-processed piece 22 is transferred to the workpiece 1.
can be easily separated from In the present invention, the short circuit phenomenon occurs and the short circuit phenomenon lasts for a predetermined period of time (for example, 5 m).
When the time period continues for about 5 ec to 1 sec, external pressure is applied to the free micro-processed piece 22 using the free-piece removal means referred to in the present invention, and the free micro-processed piece 22 is forcibly removed from the workpiece 1. This is to ensure that they are released.
第１図（Ａ）図示実施例は、上記遊離片排除手段として
ジェット・ノズル２５を用い、該ジェット・ノズル２５
から噴出されるジェット流２６ （例えば空気、放電加
工液）によって上記遊離微小加工片２２を強制的に排除
するようにしたものである。即ち、前述した短絡現象が
所定の時間継続して発生したことを検出（当該検出手段
は当業者にあっては周知のことであるため説明を省略す
る）したとき、上記ジェット・ノズル２５からジェット
流２６を切断ギャップ２４内に噴出せしめる。The illustrated embodiment in FIG. 1(A) uses a jet nozzle 25 as the loose piece removal means, and
The loose micro-machined pieces 22 are forcibly removed by a jet stream 26 (for example, air, electrical discharge machining fluid) ejected from the machine. That is, when it is detected that the short-circuit phenomenon described above has continued to occur for a predetermined period of time (the detection means is well known to those skilled in the art, the explanation will be omitted), the jet is emitted from the jet nozzle 25. A stream 26 is ejected into the cutting gap 24.
こうすることによって、第１図（Ｂ）図示状態にある遊
離微小加工片２２を容易に被加工体１から分離せしめる
ことができる。なお、上記ジェット流２６の噴出時には
、ワイヤ電極５に対する給電を停止させると共に当該ワ
イヤ電極５を後退せしめておくことが望ましい（遊離片
排除時におけるワイヤ電極５の断線防止のため）。By doing so, the free micro-machined piece 22 in the state shown in FIG. 1(B) can be easily separated from the workpiece 1. Note that when the jet flow 26 is ejected, it is desirable to stop the power supply to the wire electrode 5 and to move the wire electrode 5 backward (to prevent the wire electrode 5 from breaking when removing the loose pieces).
以上説明した如く、短絡現象検出、遊離片強制排除、放
電加工再開を自動的に連続させて行うことが可能であり
、従って、この間実際の切断加工は中断されるが、実質
的には切断加工が連続して行われると考えて良い。また
、第１図（Ｂ）図示実施例は、本発明に言うところの遊
離片排除手段としてジェット・ノズル２５を用いた一実
施例を示すものであるが、本発明に用いる遊離片排除手
段はこれに限られるものではなく、例えばピアノ線（図
示省略）を上記切断ギャップ２４に挿入して遊離微小加
工片２２を強制的に排除するようにしても良い。更にま
た、上記説明においては、押出しダイ゛スの裏逃げ部加
工時に発生する遊Ｆａ４ｄ？Ａ小加工片を例に挙げて本
発明を説明したが、他のワイヤカット放電加工の場合に
も適用されることは言うまでもない。As explained above, it is possible to automatically perform the short-circuit phenomenon detection, forced removal of loose pieces, and resumption of electrical discharge machining in succession. Therefore, although the actual cutting process is interrupted during this period, the actual cutting process is It can be considered that these are performed continuously. Further, the illustrated embodiment in FIG. 1(B) shows an embodiment in which a jet nozzle 25 is used as the loose piece removing means according to the present invention, but the loose piece removing means used in the present invention is The present invention is not limited to this, and for example, a piano wire (not shown) may be inserted into the cutting gap 24 to forcibly remove the loose micro-machined pieces 22. Furthermore, in the above explanation, the play Fa4d that occurs when machining the back relief part of the extrusion die? Although the present invention has been described using the A small machined piece as an example, it goes without saying that it is also applicable to other wire-cut electric discharge machining cases.
（発明の効果）
以上説明した如く、本発明によれば、遊離微小加工片の
遊離直前に発生するワイヤ電極の短絡現象に伴うワイヤ
電極の断線を防止することが可能となると共に、上記ワ
イヤ電極の短絡検出、遊離片の強制排除、放電加工再開
を自動的に連続して行うことにより、遊離片発生時に人
手による加工中断を行うことなく、遊離片発生時も実質
的にワイヤカット放電加工動作をｍ続させることができ
る。(Effects of the Invention) As explained above, according to the present invention, it is possible to prevent the wire electrode from being disconnected due to the short-circuit phenomenon of the wire electrode that occurs immediately before the release of the loose micro-processed piece, and to By automatically and continuously detecting short circuits, forcibly removing loose pieces, and restarting electrical discharge machining, there is no need to manually interrupt machining when a loose piece occurs, and wire-cut electric discharge machining can essentially be performed even when a loose piece occurs. can be continued m times.
第１図は本発明の一実施例を説明するための説明図、第
２図は押出しダイスの製造装置の一実施例構成、第３図
および第４図は押出しダイスにおけるベアリング孔形状
例、第５図は遊離微小加工片の発生現象を説明するため
の説明図を示す。
図中、１は被加工体、１−１は上面、１−２は下面、５
はワイヤ電極、２０は裏逃げ部、２２は遊離微小加工片
、２４は切断ギャップ、２５はジェット・ノズル、２６
はジェット流を表す。
ＣＢ）
甘 ３ 習
＋＋図 。
■
第５図（Ａ）FIG. 1 is an explanatory diagram for explaining one embodiment of the present invention, FIG. 2 is a configuration of an embodiment of an extrusion die manufacturing apparatus, and FIGS. 3 and 4 are examples of bearing hole shapes in an extrusion die. FIG. 5 shows an explanatory diagram for explaining the phenomenon of generation of loose micro-machined pieces. In the figure, 1 is the workpiece, 1-1 is the top surface, 1-2 is the bottom surface, 5
20 is a wire electrode, 20 is a relief part, 22 is a loose micro-processed piece, 24 is a cutting gap, 25 is a jet nozzle, 26
represents the jet flow. CB) Sweet 3 Xi++ figure. ■ Figure 5 (A)
Claims (1)
ット放電加工方法において、短絡発生を検出する短絡検
出手段をそなえると共に、遊離微小加工片を強制的に排
除せしめるようにする遊離片排除手段をそなえ、上記ワ
イヤ電極と被加工体との間に短絡が生じ、当該短絡が予
め定めた時間持続された時点において上記遊離片排除手
段を作動せしめるようにすることを特徴とするワイヤカ
ット放電加工方法。In a wire cut electrical discharge machining method performed with a wire electrode tilted, the present invention is equipped with a short circuit detection means for detecting the occurrence of a short circuit, and a loose piece removal means for forcibly removing loose micro-machined pieces. A wire-cut electric discharge machining method characterized in that a short circuit occurs between the wire electrode and the workpiece, and the loose piece removing means is activated when the short circuit continues for a predetermined time. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59164637A JPH0657371B2 (en) | 1984-08-06 | 1984-08-06 | Wire cut electrical discharge machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59164637A JPH0657371B2 (en) | 1984-08-06 | 1984-08-06 | Wire cut electrical discharge machining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6144533A true JPS6144533A (en) | 1986-03-04 |
| JPH0657371B2 JPH0657371B2 (en) | 1994-08-03 |
Family
ID=15796974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59164637A Expired - Fee Related JPH0657371B2 (en) | 1984-08-06 | 1984-08-06 | Wire cut electrical discharge machining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0657371B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5113051A (en) * | 1988-08-19 | 1992-05-12 | Mitsubishi Denki K.K. | Method of returning a wire electrode when broken in a wire cut electric discharging machine |
| KR102589446B1 (en) * | 2022-05-20 | 2023-10-17 | (주)제이와이 | Coating object transfer device of coating system capable of moving the location of the coating object |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54156296A (en) * | 1978-05-31 | 1979-12-10 | Mitsubishi Electric Corp | Controlling method for wire-cut electric discharge machine |
| JPS5827023U (en) * | 1981-08-14 | 1983-02-21 | 松下電工株式会社 | Wire cut electric discharge machine |
-
1984
- 1984-08-06 JP JP59164637A patent/JPH0657371B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54156296A (en) * | 1978-05-31 | 1979-12-10 | Mitsubishi Electric Corp | Controlling method for wire-cut electric discharge machine |
| JPS5827023U (en) * | 1981-08-14 | 1983-02-21 | 松下電工株式会社 | Wire cut electric discharge machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5113051A (en) * | 1988-08-19 | 1992-05-12 | Mitsubishi Denki K.K. | Method of returning a wire electrode when broken in a wire cut electric discharging machine |
| KR102589446B1 (en) * | 2022-05-20 | 2023-10-17 | (주)제이와이 | Coating object transfer device of coating system capable of moving the location of the coating object |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0657371B2 (en) | 1994-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |