JPS6119517A - Electric discharge machining apparatus - Google Patents

Electric discharge machining apparatus

Info

Publication number
JPS6119517A
JPS6119517A JP13793784A JP13793784A JPS6119517A JP S6119517 A JPS6119517 A JP S6119517A JP 13793784 A JP13793784 A JP 13793784A JP 13793784 A JP13793784 A JP 13793784A JP S6119517 A JPS6119517 A JP S6119517A
Authority
JP
Japan
Prior art keywords
electrode
discharge machining
chuck
electric discharge
hole
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
Application number
JP13793784A
Other languages
Japanese (ja)
Inventor
Bunpei Makino
牧野　文平
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13793784A priority Critical patent/JPS6119517A/en
Publication of JPS6119517A publication Critical patent/JPS6119517A/en
Pending legal-status Critical Current

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
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • 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
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To enable a work having a large thickness to be drilled for a short time in a wire electric discharge machining apparatus by providing an automatic electrode interchanging unit. CONSTITUTION:A first electrode 1 is secured fixedly to a chuck 2 to be opposed to a work 7 subjected to electric discharge machining in a hole therein. When the hole is not drilled by this electrode 1, the consumed condition of the electrode 1 is detected by a detector (not shown) for detecting the vertical moving distance of the electrode. If the electrode is consumed, a motor 4 is driven to lift the electrode 1 to the upper limit of stroke and transfer it on an electrode container (not shown), and reversed to loosen the chuck 2 and release the electrode 1. Next, the electrode is transferred on an electrode holder (not shown), the chuck 2 is lowered onto a new electrode 1 and the motor 4 is rotated forward to chuck the electrode 1 and continue the electric discharge machining. By this constitution can be drilled a thick work for a short time.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は放電加工装置、特にその電極交換装置を設けた
ワイヤ放電加工装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electric discharge machining apparatus, and particularly to a wire electric discharge machining apparatus equipped with an electrode exchange device.

〔従来技術〕[Prior art]

第６図は従来のワイヤ放電加工装置の部分説明図であり
、第４図はその全体の側面図である。図において、（１
）は電極、（２）は電極（１）を固定しているチャック
で、（３）はチャックに設けた歯車等の伝動装置であり
、電動機（４）で伝動装置（３）を介して電極（１）を
回転させる。（５）はチャック（２）に連結した軸に設
けた電動機で、電極（１１を上下方向に移動させる。FIG. 6 is a partial explanatory diagram of a conventional wire electric discharge machining apparatus, and FIG. 4 is a side view of the entire apparatus. In the figure, (1
) is the electrode, (2) is the chuck that fixes the electrode (1), and (3) is a transmission device such as a gear installed on the chuck, and the electric motor (4) connects the electrode via the transmission device (3). Rotate (1). (5) is an electric motor installed on a shaft connected to the chuck (2), which moves the electrode (11) in the vertical direction.

（６）は電極（１）の上下方向の移動距離検出器である
。(6) is a vertical movement distance detector of the electrode (1).

（７ンは被加工物、（８）は加工液供給装置である。（
９）は放電加工に際し、パルス電流を電極（１）および
被加工物（７）に給電するパルス電流電源装置である。(N7 is the workpiece, and (8) is the machining fluid supply device.)
9) is a pulse current power supply device that supplies pulse current to the electrode (1) and the workpiece (7) during electrical discharge machining.

α０はベッドで、その上にコラムＩが配設されている０
またコラムｃ１１）には上記電極（１）を固定したチャ
ック（２）を伝動装置（３ｊ１おｉび電極（１）を上下
動する電動機（５）とその上下方向移動距離検出装置（
６）が設けられている。、α２はベッドＱＯＩ上に配置
したＸ−Ｙクロヌテーブルで、電動機（１３によシ移動
する◇（１４）はＸ−Ｙクロステーブル←り上に設けｆ
Ｃ，工作台であり、被加工物（７）が工作台Ｉ上に固定
されている。α0 is the bed, on which column I is arranged 0
In addition, in column c11), there is a transmission device (3j1) that holds the chuck (2) with the electrode (1) fixed thereon, an electric motor (5) that moves the electrode (1) up and down, and a device (
6) is provided. , α2 is the X-Y cross table placed above the bed QOI, and the electric motor (13) moves it.◇(14) is the X-Y cross table←F
C, a workbench, and a workpiece (7) is fixed on the workbench I.

従来のワイヤ放電加工装置は上記のように構成され、銅
、黄銅、銀タングステン、銅タングステン等で形成され
た中空あるいは棒状の電極（１１をチャック（２）に固
定する。次いで電極（１）を、電動機（４）によシ伝動
装置（３）を介して回転させながら、ワイヤ電極（１）
と被加工物（７）を接近させる。ワイヤ電極（１）と被
加工物（７）にはそれぞれ負極および正極としてパルス
電流電源装置（９）からパルス電流が負荷されると共に
加工液供給装置（８）から加工液がワイヤ電極（１）と
被加工物（７）の間隙に供給される。このようにして、
ワイヤ電極（１）がＺ軸方向に垂下して下降し、加工深
さを電動機（５）で制御しながら、放電加工して被加工
物（７）に孔を形成する。A conventional wire electrical discharge machining apparatus is constructed as described above, and a hollow or rod-shaped electrode (11) made of copper, brass, silver tungsten, copper tungsten, etc. is fixed to the chuck (2).Then, the electrode (1) is fixed to the chuck (2). , the wire electrode (1) is rotated by the electric motor (4) through the transmission device (3).
and the workpiece (7) are brought close to each other. A pulse current is applied to the wire electrode (1) and the workpiece (7) from a pulse current power supply (9) as a negative electrode and a positive electrode, respectively, and machining fluid is applied to the wire electrode (1) from a machining fluid supply device (8). and the workpiece (7). In this way,
The wire electrode (1) hangs down in the Z-axis direction, and while the machining depth is controlled by the electric motor (5), electrical discharge machining is performed to form a hole in the workpiece (7).

しかるに、放電加工において、放電現象のため電極（１
）が消耗する。そこで電極（１）が消耗した場合、電極
（１）を交換し々ければ力らない。そのため被加工物（
力の厚さが大きいと、電極（１）の交換機構がないため
途中で放電加工が中断する。そのため電極（１）を長く
することも考えられるが、被加工物（７）とチャック（
２）の間を太きくし力ければならず、装置全体が著しく
大型と々す、高価となる。したがって厚さが大きい被加
工物（７）においては、放電加工を中断して、手動によ
り電極（１）を交換していた。However, in electrical discharge machining, the electrode (1
) is consumed. Therefore, if the electrode (1) becomes worn out, it will not be necessary to replace the electrode (1) frequently. Therefore, the workpiece (
If the thickness of the force is large, the electric discharge machining will be interrupted midway because there is no exchange mechanism for the electrode (1). Therefore, it is possible to make the electrode (1) longer, but the workpiece (7) and the chuck (
2) The gap between the two must be thickened and force must be applied, making the entire device significantly larger and more expensive. Therefore, in the case of a workpiece (7) having a large thickness, the electric discharge machining is interrupted and the electrode (1) is replaced manually.

このように従来のワイヤ放電加工装置においては、動作
が著しく煩雑と−ａｂ、加工時間が長くなる欠点があっ
た。As described above, the conventional wire electric discharge machining apparatus has the drawbacks that the operation is extremely complicated and the machining time is long.

〔発明の概要〕[Summary of the invention]

本発明はかかる欠点を改良する目的でなされたもので、
ワイヤ放電加工装置に電極を自動的に交換する装置を設
けることにより、厚みの大きい被加工物に孔を加工する
のにも、短時間でできる放電加工装置を提供するもので
ある。The present invention was made for the purpose of improving such drawbacks.
By providing a wire electrical discharge machining device with a device that automatically exchanges electrodes, an electrical discharge machining device that can machine holes in a thick workpiece in a short time is provided.

〔発明の実施例〕[Embodiments of the invention]

第１図は本発明の一実施例の要部を示す斜視図である。 FIG. 1 is a perspective view showing essential parts of an embodiment of the present invention.

図において、（１）　、　（２）　、　（７）　、　Ｑ
４）は上記従来装置と同一のものである。翰は工作台（
１４）の上に設けた割出器であり、０］）はその割出器
に取り付けられた円板状のテーブルρ電極ホルダーであ
る。電極ホルダー（２ｊ）のテーブルの周辺には複数の
穴が設けられており、電極（１）がその穴に立てられて
いる。In the figure, (1), (2), (7), Q
4) is the same as the conventional device described above. The pen is a workbench (
14) is an indexer provided on top of the indexer, and 0]) is a disk-shaped table ρ electrode holder attached to the indexer. A plurality of holes are provided around the table of the electrode holder (2j), and the electrode (1) is placed in the hole.

（２２１は割出器（２０）に取付けた電動機で、割出器
翰で割り出した電極ホルダー０Ｄの電極（１）を、電極
ホルダー（２１１’Ｔｈ回動させて所定の位置に移動さ
せる。（ハ）は消耗した電極（１）を収納する電極収納
箱である。(221 is an electric motor attached to the indexer (20), which moves the electrode (1) of the electrode holder 0D indexed by the indexer blade to a predetermined position by rotating the electrode holder (211'Th). C) is an electrode storage box that stores the exhausted electrode (1).

第２図は本発明の一実施例におけるチャック（２）上部
の部分説明図である。図において、（１）〜（４）は上
記従来装置と同一のものである。（２４）は電極（１）
と　　　　１して中空の棒状の電極を用いた場合、電極
（１）内部から加工液を通し、先端から噴出させるため
の継手である。継手（２（イ）は、２重の円筒状になっ
ており、内側の円筒状の部分が中空の電極（１）に連結
されて回動する。（２５）は継手Ｉ２（イ）の内側と外
側の円筒状部分の間に配設されたシールで、内側の円筒
状部分の回動の際、加工液の漏れを防止する。ｆ２６）
は継手（２）の内側の円筒状部分に加工液を供給する灸
である。FIG. 2 is a partial explanatory diagram of the upper part of the chuck (2) in one embodiment of the present invention. In the figure, (1) to (4) are the same as the conventional device described above. (24) is electrode (1)
When a hollow rod-shaped electrode is used, this is a joint for passing machining fluid from inside the electrode (1) and ejecting it from the tip. The joint (2 (A)) has a double cylindrical shape, and the inner cylindrical part is connected to the hollow electrode (1) and rotates. (25) is the inner side of the joint I2 (A). This is a seal placed between the inner cylindrical part and the outer cylindrical part to prevent leakage of machining fluid when the inner cylindrical part rotates.f26)
is a moxibustion method in which processing liquid is supplied to the cylindrical part inside the joint (2).

また（（５）はチャック（２）をゆるめて電極（１）を
取り外す場合とチャック（２）を回動させる場合に、そ
の使い分けのため使用されるクラッチである。Further, ((5) is a clutch that is used for different purposes: when loosening the chuck (2) to remove the electrode (1), and when rotating the chuck (2).

上記のように構成された放電加工装置において、以下に
記述するように電極（１）を自動的に交換し々から放電
加工をする。In the electrical discharge machining apparatus configured as described above, electrical discharge machining is performed by automatically replacing the electrode (1) as described below.

先ず１木目の電極（１）をチャック（２）で固定して、
被加工物（７）に接近させる。次いで、パルス電流電源
装置（９）より電極（１）を負極、被加工物（力を正極
として、パルス電流を給電して放電させ、加工液供給装
置（８）から加工液を供給し々がら被加工物（力に孔を
加工する。しかし１本目の電極（１）で被加工物（７）
に孔が貫通しない場合、放電加工を中断する。First, fix the first wood electrode (1) with a chuck (2),
approach the workpiece (7). Next, a pulsed current is supplied from the pulsed current power supply device (9) to the electrode (1) as the negative electrode and the workpiece (the force is used as the positive electrode) to cause a discharge, while machining fluid is supplied from the machining fluid supply device (8). A hole is machined on the workpiece (force). However, the first electrode (1)
If the hole does not pass through, discontinue electrical discharge machining.

そして電極（１）の消耗状態を、電極（１）の上下方向
移動距離検出器（６）で検出し、消耗している場合は、
電動機（５）を駆動して電極（１）をストロークの上限
まで上昇させる。そのままの状態で電極収納箱（２３）
の上まで移動する。次に電動機（４）を逆回私書せ、伝
動装置（３）を介してチャック（２）を緩めて、電極（
１）をチャック（２）から外して電＆［納箱（ハ）中に
落下させる。その後、チャック（２）を電極ホルダー（
２１）の上まで移動させ、電動機（５）を駆動してチャ
ック（２）を電極（１）のチャッキング可能な位置まで
下降させる。Then, the state of wear of the electrode (1) is detected by the vertical movement distance detector (6) of the electrode (1), and if the electrode (1) is worn out,
The electric motor (5) is driven to raise the electrode (1) to the upper limit of its stroke. Electrode storage box (23) as is
Move to the top. Next, turn the electric motor (4) in the reverse direction, loosen the chuck (2) through the transmission (3), and then loosen the electrode (
1) from the chuck (2) and drop it into the storage box (c). Then, attach the chuck (2) to the electrode holder (
21) and drive the electric motor (5) to lower the chuck (2) to a position where it can chuck the electrode (1).

次いで、電極ホルダー（２１１に保持された電極（１）
を、電動機（４）を正回転させて、伝動装置（３）を介
してチャック（２）によりチャッキングする。そのまま
の状態で電動機１５）を駆動して、電極（１）を上昇さ
せて、被加工物（７）の１本目の電極（１）で加工した
孔の上まで移動する。次いで、電動機（５）を駆動して
電極（１）の先端を、その孔の中まで下降させ、１本目
の電極（１）による放電加工の開始と同様の動作で放電
加工する。２本目の電極（１）で孔が貫通し力い場合は
上記の動作ｔａり返す。ｔた、別の孔を放電加工する場
合は、Ｘ−Ｙクロステーブルを電動機（１３１で移動す
る等して、別の位置で上記と同様の動作を行う。Next, the electrode (1) held by the electrode holder (211)
is chucked by the chuck (2) via the transmission device (3) by rotating the electric motor (4) in the forward direction. In this state, the electric motor 15) is driven to raise the electrode (1) and move it to above the hole machined with the first electrode (1) of the workpiece (7). Next, the electric motor (5) is driven to lower the tip of the electrode (1) into the hole, and electrical discharge machining is performed in the same manner as the start of electrical discharge machining using the first electrode (1). If the hole penetrates through the second electrode (1), repeat the above steps. If another hole is to be electrically discharged, the X-Y cross table is moved by the electric motor (131) and the same operation as above is performed at another position.

彦お、中空の電極（１）ヲ使用し、その先端から加工液
を噴出して放電加工する場合、第２図に示す継手（財）
を取付けて穴（２υより加工液を供給する。放電加工の
動作としては上記の場合と同様であるが、電極（１）の
移動に併い、−同じ位置に加工液の噴出口が移動するの
で、放電加工の動作において加工時間が短縮される。Hiko, when using a hollow electrode (1) and spouting machining fluid from its tip for electrical discharge machining, the joint shown in Figure 2 is used.
is installed and machining fluid is supplied from the hole (2υ).The operation of electrical discharge machining is the same as in the above case, but as the electrode (1) moves, the machining fluid jet port moves to the same position. Therefore, the machining time in the electric discharge machining operation is shortened.

〔発明の効果〕〔Effect of the invention〕

本発明は以上説明したとおり、電極を自動的に交換する
ことにより、放電加工に臂する時間を短縮することがで
きる。特にワイヤ放電加工においては、スタート（開始
）孔は重要力量ｋを有するが、その孔を加工する時間が
短縮できるので、電極の消耗よりも加工速度を重視した
放電条件を選択可能とがる。さらに予備の電極を多数準
備することにより、多数のスタート孔を連続して形成す
ることが可能になる等の種々の効果がある。As described above, the present invention can reduce the time required for electric discharge machining by automatically exchanging electrodes. Particularly in wire electrical discharge machining, the start hole has an important capacity k, but since the time for machining that hole can be shortened, it is possible to select discharge conditions that emphasize machining speed rather than electrode wear. Furthermore, by preparing a large number of spare electrodes, there are various effects such as making it possible to form a large number of starting holes in succession.

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

第１図は本発明の一実施例の要部を示す斜視図、第２図
は本発明の一実施例の部分説明図、第６図は従来のワイ
ヤ放電加工装置の部分説明図、第４図は、その全体の側
面図である。 図において、（１）は電極、（２）はチャック、（３）
は伝動装置、（４）は電動機、０４Ｊは工作台、（２■
は割出器、＜２１１は電極ホルダー、（社）は電動機、
（ハ）は電極収納箱、Ｃ２４＋は継手、□□□けシール
、Ｃ６）は穴、弼はクラッチである。 なお各図中同一符号は同一または相当部分を示すものと
する。 代理人　弁理士　木　村　三　朗 第１図 第２図 第３図 ら 第４図FIG. 1 is a perspective view showing essential parts of an embodiment of the present invention, FIG. 2 is a partial explanatory diagram of an embodiment of the present invention, FIG. 6 is a partial explanatory diagram of a conventional wire electrical discharge machining apparatus, and FIG. The figure is a side view of the whole. In the figure, (1) is the electrode, (2) is the chuck, and (3)
is the transmission device, (4) is the electric motor, 04J is the workbench, (2■
is the indexer, <211 is the electrode holder, and the company is the electric motor.
(C) is an electrode storage box, C24+ is a joint, □□□ seal, C6) is a hole, and □ is a clutch. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent: Patent Attorney Sanro Kimura Figure 1, Figure 2, Figure 3, and Figure 4

Claims (1)

【特許請求の範囲】[Claims] ワイヤ電極により放電加工するワイヤ放電加工装置にお
いて、電極を自動的に交換する装置が設けられているこ
とを特徴とする放電加工装置。A wire electrical discharge machining apparatus that performs electrical discharge machining using a wire electrode, characterized in that the apparatus is provided with a device that automatically replaces the electrode.
JP13793784A 1984-07-05 1984-07-05 Electric discharge machining apparatus Pending JPS6119517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13793784A JPS6119517A (en) 1984-07-05 1984-07-05 Electric discharge machining apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13793784A JPS6119517A (en) 1984-07-05 1984-07-05 Electric discharge machining apparatus

Publications (1)

Publication Number Publication Date
JPS6119517A true JPS6119517A (en) 1986-01-28

Family

ID=15210185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13793784A Pending JPS6119517A (en) 1984-07-05 1984-07-05 Electric discharge machining apparatus

Country Status (1)

Country Link
JP (1) JPS6119517A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246021A (en) * 1988-03-24 1989-10-02 Seibu Electric & Mach Co Ltd Electric discharge machine with electrode replacing device
US4990737A (en) * 1988-02-08 1991-02-05 Fanuc Ltd Initial hole machining device for a wire-cut electric discharge machine
JP2018515350A (en) * 2015-05-19 2018-06-14 ジョンソン・テクノロジー・インコーポレイテッドＪｏｈｎｓｏｎ Ｔｅｃｈｎｏｌｏｇｙ， ＩＮＣ． EDM automatic electrode changer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4990737A (en) * 1988-02-08 1991-02-05 Fanuc Ltd Initial hole machining device for a wire-cut electric discharge machine
JPH01246021A (en) * 1988-03-24 1989-10-02 Seibu Electric & Mach Co Ltd Electric discharge machine with electrode replacing device
JP2018515350A (en) * 2015-05-19 2018-06-14 ジョンソン・テクノロジー・インコーポレイテッドＪｏｈｎｓｏｎ Ｔｅｃｈｎｏｌｏｇｙ， ＩＮＣ． EDM automatic electrode changer

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