FR2771036A1 - Electrode for deburring or radiating the intersections of holes - Google Patents
Electrode for deburring or radiating the intersections of holes Download PDFInfo
- Publication number
- FR2771036A1 FR2771036A1 FR9714556A FR9714556A FR2771036A1 FR 2771036 A1 FR2771036 A1 FR 2771036A1 FR 9714556 A FR9714556 A FR 9714556A FR 9714556 A FR9714556 A FR 9714556A FR 2771036 A1 FR2771036 A1 FR 2771036A1
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- FR
- France
- Prior art keywords
- electrode
- holes
- deburring
- main hole
- intersections
- 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.)
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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
- B23H9/16—Making holes using an electrolytic jet
-
- 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
- B23H9/02—Trimming or deburring
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
DESCRIPTION
PROCEDE D'OBTENTION D'UNE ELECTRODE POUR EBAVURER ET RAYONNER
LES INTERSECTIONS DE TROUS DANS UNE PIECE
L'invention se rapporte à la fabrication des électrodes utilisée en usinage électrochimique (ECM), et plus particulièrement à la fabrication de telles électrodes pour ébavurer les intersections de trous dans une pièce dont la matière est susceptible d'être usinée par électrochimie.DESCRIPTION
METHOD FOR OBTAINING AN ELECTRODE FOR DEBURRING AND RADIATION
INTERSECTIONS OF HOLES IN A ROOM
The invention relates to the manufacture of electrodes used in electrochemical machining (ECM), and more particularly to the manufacture of such electrodes for deburring intersections of holes in a part whose material is capable of being machined by electrochemistry.
L'usinage de trous sécants dans une pièce laisse généralement des bavures sur les lignes d'intersection de ces trous. Un procédé commode pour enlever ces bavures est d'effectuer un ébavurage par électrochimie (ECM). pour cela, on utilise une électrode introduite dans l'un des trous, cette électrode étant entièrement isolée électriquement à l'exception de quelques zones dénudées dites zones actives, ces zones active ayant la forme des lignes d'intersection des trous, ces zones aztive--etaft--#Iisposées sur 1'electrode de façon à être placées face aux lignes d'intersection lorsque l'électrode est positionnée dans le trou. On réalise de la même manière le rayonnage de l'intersection des trous en augmentant la durée de l'usinage chimique.Machining intersecting holes in a part generally leaves burrs on the intersection lines of these holes. A convenient method to remove these burrs is to perform electrochemical deburring (ECM). for this, an electrode inserted into one of the holes is used, this electrode being entirely electrically isolated with the exception of a few bare areas called active areas, these active areas having the shape of the lines of intersection of the holes, these aztive areas --etaft - # Iisposé sur l'electrode so as to be placed facing the lines of intersection when the electrode is positioned in the hole. The shelving of the intersection of the holes is carried out in the same way by increasing the duration of the chemical machining.
La réalisation d'une telle électrode présente cependant une difficulté au niveau du traçage des zones actives, ce traçage étant à la fois long, fastidieux et facilement sujet à erreur. Le problème à résoudre est d'éviter cette difficulté dans la fabrication des électrodes.The production of such an electrode however presents a difficulty in terms of tracing the active areas, this tracing being both long, tedious and easily subject to error. The problem to be solved is to avoid this difficulty in the manufacture of the electrodes.
Pour cela l'invention propose un procédé d'obtention d'une électrode ECM pour ébavurer les intersections de trous dans une pièce, ladite électrode étant recouverte d'un isolant électrique, ladite électrode étant susceptible d'être positionnée dans l'un des trous appelé trou principal, ladite électrode comportant à sa surface des zones actives à la forme des lignes d'intersection entre le trou principal et d'autres trous sécants audit trou principal. For this, the invention proposes a method for obtaining an ECM electrode for deburring the intersections of holes in a room, said electrode being covered with an electrical insulator, said electrode being capable of being positioned in one of the holes. called main hole, said electrode comprising on its surface active zones in the form of lines of intersection between the main hole and other holes intersecting said main hole.
Un tel procédé est remarquable en ce qu'il comporte notamment les opérations suivantes
a) réalisation d'une pièce dite "maquette" reproduisant les trous dont il faut ébavurer les intersections,
b) positionnement de l'électrode dans le trou principal,
c) sablage de l'électrode par les trous adjacents.Such a method is remarkable in that it notably comprises the following operations
a) production of a so-called "model" part reproducing the holes whose intersections must be deburred,
b) positioning of the electrode in the main hole,
c) sandblasting of the electrode by the adjacent holes.
Le sablage ainsi effectué a pour effet de dessiner à la surface de l'électrode des silhouettes correspondant exactement à l'intersection des trous adjacents avec le trou principal, et pour résultat de dessiner sur l'électrode la forme des zones actives, cette forme correspondant aux pourtours des silhouettes. L'électrode est ensuite obtenue comme suit
d) retrait de l'électrode,
e) usinage des zones actives en suivant les contours des silhouettes.The sanding thus carried out has the effect of drawing on the surface of the electrode silhouettes corresponding exactly to the intersection of the adjacent holes with the main hole, and as a result of drawing on the electrode the shape of the active zones, this corresponding shape around the silhouettes. The electrode is then obtained as follows
d) removal of the electrode,
e) machining of active areas following the contours of the shapes.
Les présent procédé présente l'avantage de la simplicité et de la fiabilité : La pièce-maquette peut être réalisée directement à partir de séquences du programme de commande numérique de la pièce à réaliser. Le sablage est de préférence fin et peut être limité au strict nécessaire pour donner à la surface sablée un aspect différent du reste de l'électrode. Ensuite, la zone active est usinée très simplement à la main, par exemple avec une mini meule boule, en suivant le pourtour de la zone sablée.The present process has the advantage of simplicity and reliability: The model part can be produced directly from sequences of the numerical control program of the part to be produced. The sanding is preferably fine and can be limited to what is strictly necessary to give the sanded surface a different appearance from the rest of the electrode. Then, the active area is machined very simply by hand, for example with a mini ball wheel, following the periphery of the sanded area.
Dans une première forme de réalisation, l'électrode est recouverte de l'isolant préalablement aux opérations de sablage et d'usinage des zones actives. Toutefois, dans un mode de réalisation préféré, le sablage est effectué directement sur le métal nu de l'électrode. Ceci a pour effet de réaliser les silhouettes sur le métal de l'électrode et pour résultat d'obtenir des contours de silhouettes nets et précis. On réalise ensuite une gorge sur le pourtour de l'empreinte, on dépose l'isolant sur la pièce et on enlève ensuite l'isolant de la gorge pour constituer la zone active à la surface de l'électrode. In a first embodiment, the electrode is covered with the insulation prior to the sanding and machining operations of the active areas. However, in a preferred embodiment, the sandblasting is carried out directly on the bare metal of the electrode. This has the effect of producing the silhouettes on the metal of the electrode and results in obtaining crisp and precise outline of silhouettes. A groove is then produced around the periphery of the impression, the insulation is deposited on the part and the insulation is then removed from the groove to form the active area on the surface of the electrode.
L'invention sera mieux comprise et les avantages qu'elle procure apparaîtront plus clairement au vu d'un exemple détaillé de réalisation et de la figure unique annexée illustrant l'électrode et la pièce-maquette.The invention will be better understood and the advantages which it provides will appear more clearly in the light of a detailed example of embodiment and of the appended single figure illustrating the electrode and the model part.
On se reportera à la figure unique. La pièce-maquette 1 comporte trois trous 2 reproduisant les trous de la pièce réelle non représentée. L'un des trous 2a appelé trou principal est coupé par les autres trous 2b appelés trous sécants. On remarquera que, dans cet exemple tel qu'illustré par la figure unique, les diamètres des trous sont tous différents et que les axes géométriques non référencés du trou 2.2a et du trou 2.2.b supérieur ne sont pas concourants.We will refer to the single figure. The model part 1 has three holes 2 reproducing the holes of the real part, not shown. One of the holes 2a called the main hole is cut by the other holes 2b called the secant holes. It will be noted that, in this example as illustrated by the single figure, the diameters of the holes are all different and that the non-referenced geometric axes of the hole 2.2a and of the upper hole 2.2.b are not concurrent.
On référencera 3 les lignes d'intersection du trou principal 2a avec les trous sécants 2b. Sur la pièce réelle non représentée, l'ébavurage est à effectuer le long desdites lignes d'intersection 3.The lines of intersection of the main hole 2a will be referenced 3 with the secant holes 2b. On the real part not shown, deburring is to be carried out along said intersection lines 3.
L'électrode 10 non encore isolée électriquement, c'est à dire se présentant sous la forme d'un barreau métallique dénudé, est positionnée dans le trou principal 2a comme elle le serait dans la pièce réelle. On effectue ensuite un sablage fin de l'électrode 10 à l'aide d'une buse de sablage 20 placée successivement aux différentes entrées des trous sécants 2b. Ceci a pour effet de dessiner à la surface de l'électrode 10 des silhouettes 11 correspondant sensiblement à la projection des trous sécants 2b sur l'électrode 10. Le sablage est limité au strict nécessaire pour donner aux surfaces ainsi sablées un aspect différent du reste de la surface de l'électrode 10 et dessiner les silhouettes 11 avec un contour suffisamment marqué.The electrode 10 not yet electrically insulated, that is to say being in the form of a bare metal bar, is positioned in the main hole 2a as it would be in the real room. A fine sandblasting of the electrode 10 is then carried out using a sandblasting nozzle 20 placed successively at the different entrances of the secant holes 2b. This has the effect of drawing on the surface of the electrode 10 silhouettes 11 corresponding substantially to the projection of the secant holes 2b on the electrode 10. The sanding is limited to what is strictly necessary to give the surfaces thus sanded a different appearance from the rest from the surface of the electrode 10 and draw the shapes 11 with a sufficiently marked outline.
L'électrode 10 est ensuite retirée du trou principal 2b.The electrode 10 is then removed from the main hole 2b.
L'opérateur façonne les zones actives 12 à la surface de l'électrode 10 en suivant les contours des silhouettes 11.The operator shapes the active areas 12 on the surface of the electrode 10 by following the contours of the shapes 11.
Ces zones actives 12 se présentent sous la forme de simples gorges taillées à la surface de l'électrode 10. L'électrode 10 est ensuite revêtue d'un isolant électrique non référencé, et l'opérateur enlève ensuite cet isolant sur les zones actives 12, afin de permettre le passage du courant électrique qui servira à dissoudre électrochimiquement les bavures.These active areas 12 are in the form of simple grooves cut on the surface of the electrode 10. The electrode 10 is then coated with an electrical insulator not referenced, and the operator then removes this insulator on the active areas 12 , in order to allow the passage of the electric current which will serve to dissolve the burrs electrochemically.
Les avantages de l'invention apparaissent maintenant plus clairement
grande simplicité de mise en oeuvre et coût modique,
possibilité de réaliser sans risque d'erreur et sans coût
supplémentaire des électrodes pour ébavurer ou rayonner des
trous de positions relatives et de sections quelconques qui
nécessiteraient autrement un traçage délicat et complexe,
comme ce serait le cas pour l'intersection des trous 2.2a
et 2.2b supérieur de l'exemple. The advantages of the invention now appear more clearly
great simplicity of implementation and low cost,
possibility of carrying out without risk of error and without cost
additional electrodes for deburring or radiating
holes of relative positions and arbitrary sections which
otherwise would require delicate and complex tracing,
as would be the case for the intersection of holes 2.2a
and 2.2b higher of the example.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9714556A FR2771036B1 (en) | 1997-11-20 | 1997-11-20 | PROCESS FOR OBTAINING AN ELECTRODE FOR DEBURRING AND RADIATING HOLES INTERSECTIONS IN A WORKPIECE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9714556A FR2771036B1 (en) | 1997-11-20 | 1997-11-20 | PROCESS FOR OBTAINING AN ELECTRODE FOR DEBURRING AND RADIATING HOLES INTERSECTIONS IN A WORKPIECE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2771036A1 true FR2771036A1 (en) | 1999-05-21 |
| FR2771036B1 FR2771036B1 (en) | 1999-12-31 |
Family
ID=9513580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9714556A Expired - Fee Related FR2771036B1 (en) | 1997-11-20 | 1997-11-20 | PROCESS FOR OBTAINING AN ELECTRODE FOR DEBURRING AND RADIATING HOLES INTERSECTIONS IN A WORKPIECE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2771036B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028830A1 (en) * | 2010-09-02 | 2012-03-08 | Snecma | Electrode and facility for chamfering the corners of a metal workpiece |
| CN110625207A (en) * | 2019-09-23 | 2019-12-31 | 常州工学院 | Cathode tool and method for removing burrs of internal cross hole through electrolysis |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151829A (en) * | 2020-01-20 | 2020-05-15 | 常州工学院 | Electrolytic deburring device and method for deep and long crossed holes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1765890B1 (en) * | 1968-08-01 | 1972-03-09 | Wendt Kg Fritz | Process for elysing, in particular deburring workpieces without a feed movement between electrode and workpiece |
| JPS59205221A (en) * | 1983-05-06 | 1984-11-20 | Sankei Kogyosho:Kk | Electropolishing method of cylinder internal surface opening edge and electrode available thereof |
-
1997
- 1997-11-20 FR FR9714556A patent/FR2771036B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1765890B1 (en) * | 1968-08-01 | 1972-03-09 | Wendt Kg Fritz | Process for elysing, in particular deburring workpieces without a feed movement between electrode and workpiece |
| JPS59205221A (en) * | 1983-05-06 | 1984-11-20 | Sankei Kogyosho:Kk | Electropolishing method of cylinder internal surface opening edge and electrode available thereof |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 009, no. 073 (M - 368) 3 April 1985 (1985-04-03) * |
| SCHEIN HENRY: "ELECTROCHEMICAL DEBURRING", SME TECH PAP SER MR FOR DEBURRING AND SURF COND CONF;CHICAGO, IL, USA JUN 7-9 977, 1977, 1977, XP002073656 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028830A1 (en) * | 2010-09-02 | 2012-03-08 | Snecma | Electrode and facility for chamfering the corners of a metal workpiece |
| FR2964335A1 (en) * | 2010-09-02 | 2012-03-09 | Snecma | INSTALLATION OF ANGLE BREAKING ON A METAL PIECE |
| CN103079738A (en) * | 2010-09-02 | 2013-05-01 | 斯奈克玛 | Electrode and facility for chamfering the corners of a metal workpiece |
| CN110625207A (en) * | 2019-09-23 | 2019-12-31 | 常州工学院 | Cathode tool and method for removing burrs of internal cross hole through electrolysis |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2771036B1 (en) | 1999-12-31 |
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| ST | Notification of lapse |