JPS6186129A - Electrode shank - Google Patents
Electrode shankInfo
- Publication number
- JPS6186129A JPS6186129A JP20586084A JP20586084A JPS6186129A JP S6186129 A JPS6186129 A JP S6186129A JP 20586084 A JP20586084 A JP 20586084A JP 20586084 A JP20586084 A JP 20586084A JP S6186129 A JPS6186129 A JP S6186129A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- shank
- discharge processing
- pin
- holder
- 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
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
- 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
- B23H1/04—Electrodes specially adapted therefor or their manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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、放電加工機に装着して被加工物を放電加工す
る電極を有する電極シャンクに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrode shank having an electrode that is attached to an electric discharge machine and performs electric discharge machining on a workpiece.
被加工物を放電加工する際には、所望の形状に成型加工
された電極を放電加工機に装着して行う。When electrical discharge machining is performed on a workpiece, an electrode formed into a desired shape is attached to an electrical discharge machine.
この電極１は一般に第５図に示すように電極取付シャン
ク２の先端側２ａ端面にロー付けまたはボルト締めによ
り取り付け、この電極取付シャンク２は放電加工機の主
軸３に装着したシャンクホルダー４に保持される。シャ
ンクホルダー４は軸中心と一敗するように保持孔４ａが
設けられ、電極取付シャンク２を挿入した際には、保持
孔４ａの内部に設けられた図示しない油圧クランプによ
り、電極取付シャンク２の基端側２ｂをチャッキングポ
ルト４ｂを回すことによって全周から締め付けて保持し
ている。このとき、電極取付シャンク２とシャンクホル
ダー４との位相角度は、電極取付シャンク２に植設した
ピン２Ｃをシャンクホルダー４に設けた角度固定ピン４
ｃの側面に当接することにより決めでいる。
・
〔発明が解決しようとする問題点〕
かかる従来の電極１は、電極素材を予め電極取付シャン
ク２にロー付は等により取り付けた状態で成型加工して
いる。しかし、このようなロー付けを行うには、相当の
熟練を必要とし、さらに、電極１を取り付けるための別
の工程が必要となる等、その段取やロー付は作業に長時
間を要し、コスト・アップになっていた。また、電極１
と電極取付シャンク２の位置決め手段が設けられていな
いので、第５図に示すように芯ズレＧが生じ、旋盤等に
より成型加工する際に、電極部に大きな応力が加わり、
脱落することもあった。しかも、上記芯ズレＧが大きい
場合には不足部分が生じるために、ロー付は作業をやり
直すことが必要となる等の問題点を有していた。This electrode 1 is generally attached to the end face of the tip side 2a of an electrode mounting shank 2 by brazing or bolting, as shown in Fig. 5, and this electrode mounting shank 2 is held in a shank holder 4 attached to the main shaft 3 of the electrical discharge machine. be done. The shank holder 4 is provided with a holding hole 4a so as to be flush with the center of the shaft, and when the electrode mounting shank 2 is inserted, a hydraulic clamp (not shown) provided inside the holding hole 4a holds the electrode mounting shank 2 in place. The proximal end 2b is tightened and held from the entire circumference by turning the chucking port 4b. At this time, the phase angle between the electrode mounting shank 2 and the shank holder 4 is determined by changing the phase angle between the pin 2C implanted in the electrode mounting shank 2 and the angle fixing pin 4 installed in the shank holder 4.
This is determined by contacting the side surface of c.
- [Problems to be Solved by the Invention] Such a conventional electrode 1 is molded with an electrode material attached to the electrode attachment shank 2 by brazing, etc. in advance. However, such brazing requires considerable skill and requires a separate process for attaching the electrode 1, so the setup and brazing take a long time. , which resulted in increased costs. In addition, electrode 1
Since no means for positioning the electrode mounting shank 2 is provided, misalignment G occurs as shown in Fig. 5, and a large stress is applied to the electrode part during molding using a lathe or the like.
Sometimes it would fall off. In addition, if the center deviation G is large, there will be insufficient parts, and the brazing process will have to be redone.
本発明の目的は、上述の問題点に鑑み、ロー付は等の電
極取り付は作業を廃止すると共に、脱落の危険性をなく
すことにある。In view of the above-mentioned problems, an object of the present invention is to eliminate the need for electrode attachment such as brazing and to eliminate the risk of falling off.
本発明は、放電加工用の電極材により、電極部とシャン
ク部とを一体に形成したことにある。The present invention resides in that the electrode portion and the shank portion are integrally formed using an electrode material for electrical discharge machining.
以下本発明の一実施例を第１図乃至第４図により説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
第１図において、電極シャンク１０は放電加工用の電極
材により電極部１０ａとシャンク部１０ｂとが一体に形
成されている。即ち、放電加工用の電極材は、銅、真鍮
、銅−タングステン合金或いは銀−タングステン合金に
代表される導電性金属材であり、これら金属材のうち一
種を電極材として用いている。この電極材は円柱状に形
成され、図示左側のシャンク部１０ｂを第５図に示した
従来の電極取付シャンク２と同じ寸法・形状に成型する
と共に、ピン１０ｃを植設している。In FIG. 1, an electrode shank 10 has an electrode portion 10a and a shank portion 10b integrally formed of an electrode material for electrical discharge machining. That is, the electrode material for electrical discharge machining is a conductive metal material represented by copper, brass, copper-tungsten alloy, or silver-tungsten alloy, and one of these metal materials is used as the electrode material. This electrode material is formed into a cylindrical shape, and a shank portion 10b on the left side in the figure is molded to have the same size and shape as the conventional electrode mounting shank 2 shown in FIG. 5, and a pin 10c is implanted therein.
かかる電極シャンク１０の電極部１０ａを放電加工用の
電極として成型加工するに際しては、まず、シャンク部
１０ｂを予め第５図のシャンクホルダー４と同様の構成
を有する図示しないホルダー治具にピン１０ｃにより角
度位相を決めて保持する。そして、ピン１０ｃを角度位
相の基卓として、図示しない工作機械或いはワイヤカッ
ト放電加工機等により、二点鎖線で示すような所望の形
状に成型加工する。その後、第５図に示した従来例と同
様にシャンクホルダー４に保持して被加工物の放電加工
を行う。When molding the electrode part 10a of the electrode shank 10 as an electrode for electric discharge machining, first, the shank part 10b is attached to a holder jig (not shown) having the same structure as the shank holder 4 in FIG. 5 using pins 10c. Determine and maintain the angular phase. Then, using the pin 10c as a base for the angular phase, it is molded into a desired shape as shown by the two-dot chain line using a machine tool or a wire-cut electrical discharge machine (not shown). Thereafter, as in the conventional example shown in FIG. 5, the workpiece is held in the shank holder 4 and electrical discharge machining is performed on the workpiece.
ここで、上述の如く、電極シャンク１０は成型加工用の
治具からシャンクホルダー４に移し換えて保持するが、
このような所謂共加工における繰り返し精度を向上させ
るためには、シャンク部１０ｂを摩耗の小さい硬質クロ
ームやチタン・カーバイト等の金属材料を、例えばメッ
キまたは溶射法によって１０〜１００μｍの厚さで被覆
層を設けることが望ましい。Here, as described above, the electrode shank 10 is transferred from the molding jig to the shank holder 4 and held;
In order to improve the repeat accuracy in such so-called co-processing, the shank portion 10b is coated with a metal material such as hard chrome or titanium carbide, which has low wear, to a thickness of 10 to 100 μm by, for example, plating or thermal spraying. It is desirable to provide layers.
尚、電極シャンク１０には軸中心線に合致させてシャン
ク部１０ｂと電極部１０ａとを連通ずるようにフラッシ
ング用の孔を形成してもよい。Note that a flushing hole may be formed in the electrode shank 10 so as to align with the axis center line and communicate the shank portion 10b and the electrode portion 10a.
第２図は、電極シャンク１０の電極部１０ａの変形例を
示し、角ブロック状に形成したものである。FIG. 2 shows a modification of the electrode portion 10a of the electrode shank 10, which is formed into a square block shape.
この電極部１０ａは、例えば丸棒状の銅からなる電極材
を先端方向から鍛造加工により押圧成型した後に、表面
を切削することにより作られる。この場合に角ブロック
状の電極部１０ａの面とピン１０との位相角度は一致さ
せている。このように電極・部１０ａをシャンク部１０
ｂより大きい外径寸法にすれば、より大きい放電加工用
の電極が形成される。This electrode portion 10a is made by, for example, press-forming an electrode material made of copper in the shape of a round bar from the tip direction by forging, and then cutting the surface. In this case, the phase angle between the surface of the square block-shaped electrode portion 10a and the pin 10 is made to match. In this way, the electrode/part 10a is connected to the shank part 10.
If the outer diameter is larger than b, a larger electrode for electrical discharge machining will be formed.
尚、電極部１０ａの形状を他の任意の形状に変更しても
よいことは勿論である。It goes without saying that the shape of the electrode portion 10a may be changed to any other shape.
第３図は、電極シャンク１０のシャンク部１０ｂの変形
例を示し、他の構成のシャンクホルダーに保持する場合
に用いられる。即ち、シャンク部１０ｂには端部側にカ
ット面部１０ｄを形成すると共に、周面にテーパ溝１０
ｅを形成している。そして、二点鎖線で示すシャンクホ
ルダー内に設けた位相角度を決めるためのストレートピ
ン１１をカット面部１０ｄに当接すると共に、締付ボル
ト１２によりボルダ−内に強固に保持するようにしてい
る。FIG. 3 shows a modification of the shank portion 10b of the electrode shank 10, which is used when held in a shank holder having another configuration. That is, the shank portion 10b is formed with a cut surface portion 10d on the end side, and a tapered groove 10 is formed on the circumferential surface.
It forms e. A straight pin 11 for determining the phase angle provided in the shank holder shown by a two-dot chain line is brought into contact with the cut surface portion 10d, and is firmly held in the boulder by a tightening bolt 12.
このようなシャンク部１０ｂの形状は、テーパ状シャン
ク等シャンクホルダーの構成に適合する形状に適宜設定
される。The shape of the shank portion 10b is appropriately set to a shape that matches the configuration of the shank holder, such as a tapered shank.
第４図は、電極シャンク１０におけるシャンク部１０ｂ
のさらに他の実施例を示し、シャンク部１０ｂに補強用
のパイプ部材１３を嵌着したものである。FIG. 4 shows a shank portion 10b of the electrode shank 10.
This shows still another embodiment, in which a reinforcing pipe member 13 is fitted to the shank portion 10b.
即ち、第２図の例において、肉薄の被覆層では強度的に
不充分な場合には、硬質の導電性金属材からなるパイプ
部材１３を、電極部１０ａよりも小さい径にしたシャン
ク部ｌＯｂに圧入的に嵌着する。そして、パイプ部材１
３及びシャンク部１０ｂの同位置に小孔を穿設してピン
１０ｃを植設して抜は止め作用を兼用させる。このよう
にパイプ部材１３を嵌着すれば、３点保持するような旋
盤等のチャックに保持させてもシャンク部１０ｂの変形
が防止されるので、放電加工機に装着しても取付精度が
維持される。That is, in the example of FIG. 2, if the thin coating layer is insufficient in terms of strength, the pipe member 13 made of a hard conductive metal material is attached to the shank portion lOb having a diameter smaller than that of the electrode portion 10a. Fits by press-fitting. And pipe member 1
3 and the shank portion 10b at the same position, and a pin 10c is implanted therein to serve also as a mechanism for preventing removal. By fitting the pipe member 13 in this way, deformation of the shank portion 10b is prevented even when the pipe member 10b is held in a chuck such as a lathe that holds at three points, so the installation accuracy is maintained even when it is installed in an electrical discharge machine. be done.
以上説明した本発明によれば、電極部とシャンク部が放
電加工用の電極材により一体に形成されているので、シ
ャンクと電極との芯ズレや位相角度ズレがなくなり高精
度にできる。さらに、ロー付は等の電極取付作業を廃止
することができ、手番を大幅に短縮できる。また、電極
がシャンクより離脱する事故も防止できる等の効果を奏
する。According to the present invention described above, since the electrode part and the shank part are integrally formed of an electrode material for electric discharge machining, there is no center misalignment or phase angle misalignment between the shank and the electrode, and high precision can be achieved. Furthermore, electrode mounting work such as brazing can be eliminated, and the number of steps can be significantly reduced. Further, it is possible to prevent an accident in which the electrode separates from the shank.
第１図は本発明の一実施例を示す電極シャンクの斜視図
、第２図は電極部の変形例を示す要部斜視図、第３図は
シャンク部の変形例を示す斜視図、第４図はシャンク部
の他の変形例を示す切り欠き断面図、第５図は従来例を
示す分解斜視図である。
１〇−電極シャンク １０ａ −電極部 １ｏｂ−シャ
ンク部 １０ｃ・・−ピンFIG. 1 is a perspective view of an electrode shank showing an embodiment of the present invention, FIG. 2 is a perspective view of main parts showing a modification of the electrode part, FIG. 3 is a perspective view of a modification of the shank part, and FIG. The figure is a cutaway sectional view showing another modification of the shank portion, and FIG. 5 is an exploded perspective view showing a conventional example. 10-electrode shank 10a-electrode part 1ob-shank part 10c...-pin
Claims (1)
体に形成したことを特徴とする電極シャンク。An electrode shank characterized in that an electrode part and a shank part are integrally formed using an electrode material for electrical discharge machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20586084A JPS6186129A (en) | 1984-10-01 | 1984-10-01 | Electrode shank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20586084A JPS6186129A (en) | 1984-10-01 | 1984-10-01 | Electrode shank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6186129A true JPS6186129A (en) | 1986-05-01 |
Family
ID=16513911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20586084A Pending JPS6186129A (en) | 1984-10-01 | 1984-10-01 | Electrode shank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6186129A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237146A (en) * | 1988-08-19 | 1993-08-17 | Buchler B-Set Ag | Device for fastening an article, disposed at an end of a cylindrical shaft, at a coupling member of a coupling means |
| US6444941B1 (en) * | 1997-12-09 | 2002-09-03 | Anthony A. Russo | Tool holding system |
| CN103071872A (en) * | 2013-01-24 | 2013-05-01 | 苏州群伦精密机电工业有限公司 | Rotating shaft device for discharging processing machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152533A (en) * | 1980-04-23 | 1981-11-26 | Mitsubishi Electric Corp | Electric discharge machining method |
-
1984
- 1984-10-01 JP JP20586084A patent/JPS6186129A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152533A (en) * | 1980-04-23 | 1981-11-26 | Mitsubishi Electric Corp | Electric discharge machining method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237146A (en) * | 1988-08-19 | 1993-08-17 | Buchler B-Set Ag | Device for fastening an article, disposed at an end of a cylindrical shaft, at a coupling member of a coupling means |
| US6444941B1 (en) * | 1997-12-09 | 2002-09-03 | Anthony A. Russo | Tool holding system |
| CN103071872A (en) * | 2013-01-24 | 2013-05-01 | 苏州群伦精密机电工业有限公司 | Rotating shaft device for discharging processing machine |
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