JPS6244315A - Electric discharge grinding continuous processing equipment - Google Patents
Electric discharge grinding continuous processing equipmentInfo
- Publication number
- JPS6244315A JPS6244315A JP18350785A JP18350785A JPS6244315A JP S6244315 A JPS6244315 A JP S6244315A JP 18350785 A JP18350785 A JP 18350785A JP 18350785 A JP18350785 A JP 18350785A JP S6244315 A JPS6244315 A JP S6244315A
- Authority
- JP
- Japan
- Prior art keywords
- machining
- grinding
- tool
- electrode
- electric 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.)
- Pending
Links
- 238000003754 machining Methods 0.000 claims description 29
- 238000009760 electrical discharge machining Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- UYKQQBUWKSHMIM-UHFFFAOYSA-N silver tungsten Chemical compound [Ag][W][W] UYKQQBUWKSHMIM-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は、放電加工および仕上げ用の研削加工を一つの
工具で連続して行う放電研削連続加工装置、ことに使用
する工具の構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a continuous electrical discharge grinding machine that continuously performs electrical discharge machining and finishing grinding with one tool, and particularly to the structure of the tool used.
超硬合金等からなる型、治エバ等に孔加工を行う場合、
放電加工法が加工体の硬さに関わりなく孔加工できる特
徴を有することから広く利用されている。第５図は従来
技術における加工状態を示す原理的な説明図であシ、工
具軸２の下端には例えば銅、アルミニウム、タングステ
ン、モリブデン、銀−タングステン、銅−タングステン
、グラファイトなどからなる電極６が、工具軸２の中間
部には絶縁７ランジ５Ａ、集電子５Ｂなどを有する放電
加工用の加工工具１を図示しない放電加工機の駆動部に
支持させるとともに、白灯油等の加工液に浸漬された状
態で放電加工機のヘッドに固定された加工体１０の加工
部との間に微小放電間隙？（白灯油で満たされる）を常
に保持させつつ、放電加工用の電源部２０からパルス幅
１０−７〜１０−３８のパルス電圧を給電子６．集電子
５Ｂを介して放電間隙ｔに印加してパワー密度１０５〜
１０８Ｗ／ａｍ’程度の短時間アーク放電１００を放電
間隙ｉ中で発生させることにより、前記パワー密度がご
く限られた面積に集中することにより、この微小面積に
おける加工体１ｏあるいは電極３の表面で溶融、蒸発が
行われ、この部分にクレータと呼ばれる凹みを生じ、ア
ーク放Ｗ、１００を繰り返し発生させることにより多数
のクレータの集合体からなる放電加工孔１１を形成する
ことができる。またカロエの進捗に伴なって電極６の側
面部でもアーク放′ｆｊＬ１００が発生するので、放電
加工孔１１の半径は電極乙のそれよりΔγ （拡大代と
よぶ）だけ大きく々る。したがって、多数のクレータの
集合体からなる放電加工面は梨地状の粗面になシ、その
径は放電エネルギーの大小により拡大代Δτが数十ない
し百μｍの範囲で変動することになるので、高度の面粗
さおよび寸法精度を要求される型、治工具等の孔加工に
おいては、研削仕上げ加工が行われるのが普通でちる。When drilling holes in molds, evaporators, etc. made of cemented carbide, etc.
The electrical discharge machining method is widely used because it has the feature of being able to machine holes regardless of the hardness of the workpiece. FIG. 5 is a principle explanatory diagram showing the machining state in the prior art. At the lower end of the tool shaft 2, there is an electrode 6 made of copper, aluminum, tungsten, molybdenum, silver-tungsten, copper-tungsten, graphite, etc. However, a machining tool 1 for electrical discharge machining, which has an insulating 7 flange 5A, a current collector 5B, etc. in the middle part of the tool shaft 2, is supported by a drive part of an electrical discharge machine (not shown), and is immersed in a machining fluid such as white kerosene. There is a small discharge gap between the machined part of the workpiece 10 fixed to the head of the electrical discharge machine in the state where (filled with white kerosene), a pulse voltage with a pulse width of 10-7 to 10-38 is applied from the electric discharge machining power source 20 to the feeder 6. A power density of 105~ is applied to the discharge gap t via the current collector 5B.
By generating a short-time arc discharge 100 of about 108 W/am' in the discharge gap i, the power density is concentrated in a very limited area, so that the surface of the workpiece 1o or the electrode 3 in this minute area is Melting and evaporation occur, creating a depression called a crater in this part, and by repeatedly generating the arc discharge W, 100, an electrical discharge machining hole 11 consisting of a large number of craters can be formed. Furthermore, as arcing progresses, arc radiation fjL100 is also generated on the side surface of the electrode 6, so the radius of the electrical discharge machining hole 11 increases by Δγ (referred to as expansion range) than that of the electrode B. Therefore, the electrical discharge machined surface consisting of a large number of craters is not a satin-like rough surface, and its diameter varies in the range of tens to 100 μm depending on the magnitude of the discharge energy. When machining holes in molds, jigs, etc. that require a high degree of surface roughness and dimensional accuracy, finishing machining is usually performed by grinding.
第６図は研削仕上げ加工状態を示す説明図であシ、加工
軸２の端部の外周面に砥石部４を有する研削工具を放１
！加工孔１１に挿入し、研削工具に回転、上下運動を与
えるとともに、加工体１０をゆっくシ揺動させることに
より、研削仕上げ加工が行われる。FIG. 6 is an explanatory view showing the state of finishing grinding, in which a grinding tool having a grindstone portion 4 on the outer peripheral surface of the end of the processing shaft 2 is released.
! Finishing grinding is performed by inserting the grinding tool into the processing hole 11, giving rotation and vertical motion to the grinding tool, and slowly rocking the workpiece 10.
前述のように従来技術においては、孔加工が放電加工と
研削仕上げ加工の２工程になるために、加工の段取時間
が多くなるという問題点があシ、その改善が求められて
いた。As mentioned above, in the conventional technology, since hole machining involves two steps: electrical discharge machining and finishing grinding, there is a problem in that machining setup time increases, and an improvement has been sought.
本発明は前述の状況に鑑みてなされたもので、放電加工
と研削仕上げ加工を連続して行うことができ、したがっ
て段取シ作業を省力化できる放電研削連続加工装置を提
供することを目的とする。The present invention was made in view of the above-mentioned situation, and an object of the present invention is to provide a continuous electrical discharge grinding machine that can perform electrical discharge machining and grinding finishing machining continuously, thereby saving labor in setup work. do.
本発明は、工具軸の電極側の端部の外周面に絶縁性を有
する円筒状の砥石部を設けるよう構成したことにより、
まず電極と加工体との間で放電加工による孔加工を行な
い、つぎに孔加工の進捗に伴なって放電加工と研削仕上
げ加工を行ない、放電孔加工終了時点においては電源部
を遮断した状態で引き続き研削仕上げ加工を連続して行
うことができるようにしたものである。The present invention has a configuration in which an insulating cylindrical grindstone portion is provided on the outer circumferential surface of the end of the tool shaft on the electrode side.
First, a hole is machined by electric discharge machining between the electrode and the workpiece, and then, as the hole machining progresses, electric discharge machining and finishing grinding are performed.At the end of the discharge hole machining, the power supply is cut off. This allows continuous grinding and finishing.
以下本発明を一実施例に基づいて説明する。 The present invention will be explained below based on one embodiment.
第１図は本発明の実施例を示す要部の側面図、第２図は
第１図の要部の拡大側断面図である。第１図において、
放電加工機の回転および上下動の駆動部７に一端が支持
された工具軸２の中間部には絶縁７ランジ５Ａおよび集
電子５Ｂが設けられ、集電子５Ｂに摺動接触した給電子
６側から加えられたパルス電圧が、工具軸２の先端に結
合された放電加工用の電極乙に印加され、駆動部７側に
は印加されないよう形成されている。４は工具軸２の端
部に形成された研削砥石部であわ、第２図に示すように
、工具軸２にねじ結合された電極乙に近接した工具軸２
の表面の膜状砥石部４に対応する部分に浅い段付部を設
け、この部分にレジンボンド系あるいはビトリファイド
系などの絶縁性を有する砥石剤を塗布焼付けすることに
より、電極３の外側にΔＲだけ突出した膜状砥石部４が
形成されている。突出寸法ΔＲは放電加工孔の拡大代Δ
ｒを考慮してΔｒと同等以下の寸法に決められる。FIG. 1 is a side view of a main part showing an embodiment of the present invention, and FIG. 2 is an enlarged side sectional view of the main part of FIG. In Figure 1,
An insulating 7 flange 5A and a current collector 5B are provided in the middle part of the tool shaft 2, one end of which is supported by the rotating and vertically movable drive unit 7 of the electric discharge machine, and the power supply 6 side is in sliding contact with the current collector 5B. The pulse voltage applied from the tool shaft 2 is applied to the electric discharge machining electrode B connected to the tip of the tool shaft 2, and is not applied to the drive unit 7 side. 4 is a grinding wheel formed at the end of the tool shaft 2, as shown in FIG.
By providing a shallow stepped portion on the surface of the electrode 3 in a portion corresponding to the film-like grinding wheel portion 4, and applying and baking an insulating grinding agent such as a resin bond type or vitrified type to this portion, ΔR is formed on the outside of the electrode 3. A membranous grindstone portion 4 is formed that protrudes by a certain amount. The protrusion dimension ΔR is the expansion margin Δ of the electrical discharge machining hole.
Considering r, the dimension is determined to be equal to or smaller than Δr.
第３図は第１図で示される実施例における放電加工状態
を示す説明図、第４図は切削仕上げ加工状態を示す説明
図である。第６図において、電源部２０から供給される
パルス電圧によりミ極５と加工体１０との間の放電間隙
ｉ中でアーク放電が繰返し発生し、放電力ｎ１孔１１の
深さが徐々に深くなるに従って、回転する研削砥石部４
の外周面が放電加工孔１１の側壁部と接触することによ
り、放電加工と研削仕上げ加工とが同時に進行する。FIG. 3 is an explanatory diagram showing the electric discharge machining state in the embodiment shown in FIG. 1, and FIG. 4 is an explanatory diagram showing the cutting finish machining state. In FIG. 6, arc discharge occurs repeatedly in the discharge gap i between the mipole 5 and the workpiece 10 due to the pulse voltage supplied from the power supply section 20, and the depth of the discharge force n1 hole 11 gradually increases. The grinding wheel part 4 rotates as the
By contacting the outer peripheral surface with the side wall portion of the electrical discharge machining hole 11, electrical discharge machining and finishing grinding proceed simultaneously.
やがて放電加工孔１１が貫通すると、スイッチ２１が遮
断され、第４図に示すように、工具軸２を回転および上
下動させるとともに、加工体１０を工具軸２０回転軸に
対して遊星運動させて行なう研削砥石部４による研削仕
上げ加工が連続して行われ、所定の寸法精度、仕上シ面
粗さを有する孔を形成することができる。Eventually, when the electrical discharge machining hole 11 penetrates, the switch 21 is shut off, and as shown in FIG. The finishing process by grinding using the grinding wheel 4 is performed continuously, and a hole having predetermined dimensional accuracy and finished surface roughness can be formed.
なお、研削砥石部４が絶縁性を有するよう構成したこと
により、例えば第６図に示すように放電加工と研削仕上
げ加工が同時進行する過程においても、砥石部と加工体
１０との間にアーク放電が発生するのを阻止できるので
、仕上げ面がアーク放電によって再び荒れることを防止
することができる。また工具軸に切欠きを設けて研削砥
石部４の厚みを厚くできるよう構成したことにより、砥
石部４の耐電圧強度を高めることができるとともに、砥
石の寿命を延長できる利点を得ることができる。さらに
また、絶縁７ランジまたは集電子は必ずしも工具軸の中
間に設ける必要はなく、放電加工機の駆動部側に設ける
よう構成してもよい。Furthermore, since the grinding wheel part 4 is configured to have insulating properties, there is no arc between the grinding wheel part and the workpiece 10 even in the process where electric discharge machining and finishing grinding are performed simultaneously, as shown in FIG. 6, for example. Since the occurrence of electric discharge can be prevented, the finished surface can be prevented from becoming rough again due to arc discharge. Furthermore, by providing a notch in the tool shaft so that the thickness of the grinding wheel part 4 can be made thicker, the withstand voltage strength of the grinding wheel part 4 can be increased, and the life of the grinding wheel can be extended. . Furthermore, the insulating 7 flange or the current collector does not necessarily need to be provided in the middle of the tool shaft, but may be provided on the drive section side of the electric discharge machine.
本発明は前述のように、工具軸の先端に電極を、電極に
近接した外周面側に絶縁性の研削砥石部を有する加工工
具を備え、放電孔加工と研削仕上げ加工とを一つの加工
工具によって連続して行えるよう構成した。その結果、
従来問題となった放電加工工具と研削加工工具とを取シ
換えるための段取シ作業および作業時間が排除され、し
たがりて従来技術に比べて作業効率が高く桶済的に有利
な放電研削連続加工装置を提供することができる。As described above, the present invention includes a machining tool having an electrode at the tip of the tool shaft and an insulating grinding wheel portion on the outer circumferential side near the electrode, and performs discharge hole machining and grinding finishing machining in one machining tool. It is configured so that it can be performed continuously. the result,
Electric discharge grinding eliminates the setup work and work time needed to replace the electrical discharge machining tool and the grinding tool, which was a problem in the past, and therefore has higher work efficiency and is advantageous in terms of cost compared to conventional technology. Continuous processing equipment can be provided.
第１図は本発明の実施例を示す要部の側面図、第２図は
第１図における要部の拡大側断面図、第３図は放１！加
工状態を示す説明図、第４図は研削仕上げ加工状態を示
す説明図、第５図は従来技術における放電加工状態を示
す説明図、第６図は研削加工状態を示す説明図である。
１・・・放電加工工具、２・・・工具軸、６・・・を極
、４・・・研削砥石部、５Ａ・・・絶縁７ランジ、５Ｂ
・・・集電子、６・・・給電子、７・・・駆動部、１０
・・・加工体、１１・・・放電加工孔、２０・・・電源
部、？・・・放電間隙、Δｒ・・・拡大代。
ｊ七１人弁理士 山 口 富
第１図 第２図
第５図
第６図Fig. 1 is a side view of the main part showing an embodiment of the present invention, Fig. 2 is an enlarged side sectional view of the main part in Fig. 1, and Fig. 3 is a side view of the main part showing an embodiment of the present invention. FIG. 4 is an explanatory diagram showing the machining state. FIG. 5 is an explanatory diagram showing the electrical discharge machining state in the prior art. FIG. 6 is an explanatory diagram showing the grinding state. DESCRIPTION OF SYMBOLS 1... Electrical discharge machining tool, 2... Tool shaft, 6... Pole, 4... Grinding wheel part, 5A... Insulation 7 lange, 5B
. . . Current collector, 6 . . . Power feeder, 7 .
...Working body, 11...Electric discharge machining hole, 20...Power supply part, ? ...discharge gap, Δr...expansion amount. j71 Patent Attorney Tomi Yamaguchi Figure 1 Figure 2 Figure 5 Figure 6
Claims (1)
とを連続して行う加工装置であって、工具軸の先端部に
結合された放電加工用の電極と、この電極に近接した前
記工具軸の外周側に円筒状に一体化形成された電気絶縁
性を有する研削砥石部とを備えた加工工具を備えたこと
を特徴とする放電研削連続加工装置。 ２）特許請求の範囲第１項記載のものにおいて、工具軸
の電極側の外周部に電極径より小なる直径の段付部が設
けられ、この段付部を覆うように研削砥石部が形成され
るとともに、研削砥石部の外径が電極径に拡大代を加え
た寸法と同等以下であることを特徴とする放電研削連続
加工装置。[Scope of Claims] 1) A machining device that continuously performs electrical discharge hole machining and grinding finishing machining using one machining tool, which comprises: an electrode for electrical discharge machining coupled to the tip of a tool shaft; and this electrode. 1. A continuous electric discharge grinding machining device comprising: a machining tool having an electrically insulating grinding wheel portion integrally formed in a cylindrical shape on the outer peripheral side of the tool shaft adjacent to the tool shaft. 2) In the tool described in claim 1, a stepped portion having a diameter smaller than the electrode diameter is provided on the outer periphery of the tool shaft on the electrode side, and a grinding wheel portion is formed to cover this stepped portion. and an outer diameter of the grinding wheel portion is equal to or smaller than the electrode diameter plus an expansion margin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18350785A JPS6244315A (en) | 1985-08-21 | 1985-08-21 | Electric discharge grinding continuous processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18350785A JPS6244315A (en) | 1985-08-21 | 1985-08-21 | Electric discharge grinding continuous processing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6244315A true JPS6244315A (en) | 1987-02-26 |
Family
ID=16137043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18350785A Pending JPS6244315A (en) | 1985-08-21 | 1985-08-21 | Electric discharge grinding continuous processing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6244315A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002239847A (en) * | 2001-02-16 | 2002-08-28 | Seiko Epson Corp | Method for processing a part forming tool and a part forming tool manufactured using the method |
| CN108213625A (en) * | 2017-12-25 | 2018-06-29 | 江苏大学 | A kind of electrochemical drilling and the tool and method of reaming Compound Machining elongated hole |
| CN108213624A (en) * | 2017-12-25 | 2018-06-29 | 江苏大学 | A kind of electric-spark drilling and the tool and method of reaming Compound Machining elongated hole |
| CN109746533A (en) * | 2017-11-06 | 2019-05-14 | 南京航空航天大学 | Multi-channel discharge atomization ablation grinding composite machining method |
-
1985
- 1985-08-21 JP JP18350785A patent/JPS6244315A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002239847A (en) * | 2001-02-16 | 2002-08-28 | Seiko Epson Corp | Method for processing a part forming tool and a part forming tool manufactured using the method |
| CN109746533A (en) * | 2017-11-06 | 2019-05-14 | 南京航空航天大学 | Multi-channel discharge atomization ablation grinding composite machining method |
| CN108213625A (en) * | 2017-12-25 | 2018-06-29 | 江苏大学 | A kind of electrochemical drilling and the tool and method of reaming Compound Machining elongated hole |
| CN108213624A (en) * | 2017-12-25 | 2018-06-29 | 江苏大学 | A kind of electric-spark drilling and the tool and method of reaming Compound Machining elongated hole |
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