WO1986007552A1 - Method for fabricating a filiform electrode for electro-erosion machining - Google Patents

Method for fabricating a filiform electrode for electro-erosion machining Download PDF

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Publication number
WO1986007552A1
WO1986007552A1 PCT/CH1985/000101 CH8500101W WO8607552A1 WO 1986007552 A1 WO1986007552 A1 WO 1986007552A1 CH 8500101 W CH8500101 W CH 8500101W WO 8607552 A1 WO8607552 A1 WO 8607552A1
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WO
WIPO (PCT)
Prior art keywords
wire
filiform
coating
electrode
coated
Prior art date
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PCT/CH1985/000101
Other languages
French (fr)
Inventor
Yehuda Talmor
Michel Kornmann
Oskar Dill
Original Assignee
Daiichi, Denko
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 Daiichi, Denko filed Critical Daiichi, Denko
Priority to PCT/CH1985/000101 priority Critical patent/WO1986007552A1/en
Priority to EP19850902948 priority patent/EP0227645A1/en
Publication of WO1986007552A1 publication Critical patent/WO1986007552A1/en

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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
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/08—Wire electrodes

Definitions

  • the present invention relates to a method of manufacturing a filiform electrode for machining by electro-erosion including a filiform core surrounded by a metallic layer.
  • Such electrodes have already been proposed, in particular in US Pat. No. 4,287,404. Such electrodes facilitate the initiation of discharges and withstand high intensities. By using a coating of zinc or zinc alloy, the high vapor pressure of this metal constitutes a thermal shield against the heat released by the discharges, reducing the risks of rupture of the core for intensities relatively high current.
  • Such electrodes are obtained by galvanic deposition of a metallic coating and are relatively expensive due to the speed of such a deposition process and the pollution problems inherent therein.
  • the consumption of electrode is relatively high.
  • This solution requires a transformation of the machine, as well as the adaptation of the electrolytic bath to the speed of travel of the wire iimposed by machining by electro-erosion, which is not a simple problem.
  • the maintenance and monitoring of the cell does not belong to the domain of the mechanic who uses the machine. This is undoubtedly the reason why such electrode wires are generally not regenerated on the EDM machine.
  • the purpose of the present invention is to provide a solution to the manufacture of such son which is economically more advantageous than that proposed so far.
  • There are known processes for coating wire which consist in passing this wire from bottom to top in a bath of molten metal. Such methods make it possible to obtain a wire coated with a relatively thick layer of molten metal, at high speeds and with perfect centering of the coating with respect to the Ion axis. gitudinal of the wire. Such a process is in particular the subject of US patent 4,169,426.
  • the present invention provides a high speed manufacturing method of filamentary electrodes for EDM machining of the above type, based in part on the above high speed coating process.
  • the subject of the present invention is a method of manufacturing a filiform electrode according to claim 1.
  • This installation includes a feeding station 1 intended to deliver the wire 2 to be coated.
  • This wire then passes through a preheating station 3 which co ⁇ porte a DC power supply 4 by wipers 5 between two pulleys 6.
  • the wire 2 passes through a nozzle 7 supplied with molten metal by a crucible 8, the level of molten metal is controlled by a plunger piston 9.
  • the nozzle 7 has two openings 7a and 7b located directly above one another in. the vertical trajection of the wire. Above this nozzle 7, there is a cooling enclosure 10 supplied with a circulation of water. On leaving this enclosure, the wire 2 is led to a winding station 11.
  • the wire drawing installation of the coated wire is not illustrated here, since it is a completely conventional installation.
  • the coating installation which has just been described is preferably preceded by a cleaning station in which the wire is passed through degreasing and, possibly, chemical pickling solutions, in order to guarantee a good coating adhesion.
  • the cleaning operation can also be interposed between the outlet of the feed station and the inlet of the preheater. This type of treatment is known and is not directly part of the invention. This is the reason why it is neither described nor represented.
  • the cleaning operations consist of passing the wire through an alkaline degreasing solution, then rinsing it under running water, then passing it through an acid pickling solution, then rinsing it with running water before rinsing it with deionized water.
  • the preheating operation in station 3 takes place in an inert atmosphere of N 2 , + H 2 , in order to avoid oxidation of the wire.
  • the principle of the method of coating the wire 2 through the nozzle 7 consists in passing the wire by moving it from the bottom up and keeping the molten metal in the nozzle 7 so that the hot wire is wetted by the metal in fusion and brings a layer of metal to its surface.
  • the thickness of the layer is equal all around the filiform core, so that this core is perfectly centered. Consequently, the drawing operation to which this wire thus coated is called to be subjected will make it possible to obtain a coated wire whose core will be perfectly centered.
  • the choice of operating parameters can be made in a fairly wide range of speeds and temperatures.
  • the higher the running speed and the higher the preheating temperature of the wire the more the thickness of the coating layer decreases.
  • the wires used to carry out the tests were brass wires, co ⁇ pre ⁇ ant 65% Cu, 35% Zn, 0.07% Pb, 0.05% FE, with a diameter of 0.63 mm.
  • the running speeds were between 30 and 460 m / min. It has been found that the effect of the preheating temperature is felt mainly between 30 and 150 m / min. As for the effect of speed on the thickness, this varies from about 150 ⁇ m at 30 m / min to about 50 ⁇ m at 460 m / min.
  • the wires coated in order to produce electrodes by drawing are wires of 0.63 mm and the thickness of the layer of zinc deposited according to the method described is of the order of 100 yum for a running speed of the order from 150 to 200 m / min. At this speed, the preheating temperature must be greater than 200 ° - 250 ° C to ensure good adhesion of the coating.
  • the coated wire was brought from a diameter of the order of 0.8 mm to a diameter of 0.3 mm, constituting the wire intended to be used as an electrode in an EDM machining process.
  • the length of the drawn wire is seven times longer than that of the initial wire so that the production of filiform electrode is of the order of 1000 to 1400 m / min, which gives a diameter of l the core of the electrode on the order of 0.22 mm with a layer of zinc on the order of 40 ⁇ m.
  • the increase in productivity is of the order of a factor of 100.
  • these values do not constitute maximum limits, but that they fall within an average range of parameters.
  • the process described is not limited to the use of zinc, but can be used with any other metal or alloy with a low melting point and a high vapor pressure, such as cadmium and magnesium or alloys of these metals.
  • the wire on which the coating can be deposited may be made of brass or copper, steel, or any other metal capable of withstanding the working temperature and having an appropriate tensile strength and electrical conductivity.

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  • 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

The method comprises the coating of a brass wire (2) with a layer of a high vapour tension, low melting point metal or alloy such as zink, cadmium, magnesium or alloys of said metals, by passing the wire vertically from bottom to top into a nozzle (7) supplied with molten metal by a crucible (8). After cooling in a housing (10), the wire thus coated is brought to its final diameter and the coating to a useful thickness by a wire-drawing operation.

Description

PROCEDE DE FABRICATION D'UNE ELECTRODE FILIFORME POUR L'USINAGE PAR ELECTRO-EROSION METHOD FOR MANUFACTURING A FILIFORM ELECTRODE FOR ELECTRO-EROSION MACHINING
La présente invention se rapporte à un procédé de fabrication d'une électrode filiforme pour l'usinage par électro-érosion coπprenant une âme filiforme entourée d'une couche métallique.The present invention relates to a method of manufacturing a filiform electrode for machining by electro-erosion including a filiform core surrounded by a metallic layer.
On a déjà proposé de telles électrodes, notamment dans le brevet US 4 287 404. De telles électrodes facilitent l'amorçage des décharges et supportent des intensités élevées. En utilisant un revêtement de zinc ou d'alliage de zinc, la tension de vapeur élevée de ce métal constitue un blindage thermique vis-à-vis de la chaleur dégagée par les décharges, réduisant las risques de rupture de l'âme pour des intensités de courant relativement élevées.Such electrodes have already been proposed, in particular in US Pat. No. 4,287,404. Such electrodes facilitate the initiation of discharges and withstand high intensities. By using a coating of zinc or zinc alloy, the high vapor pressure of this metal constitutes a thermal shield against the heat released by the discharges, reducing the risks of rupture of the core for intensities relatively high current.
De telles électrodes sont obtenues par dépôt galvanique d'un revêtement métallique et coûtent relativement cher en raison de la vitesse d'un tel processus de dépôt et des problèmes de pollution qui lui sont inhérentes. Or la consommation d'électrode est relativement importante. Pour réduire le coût, on a proposé de former une électrode à boucle fermée et de faire passer une portion de cette boucle dans un bac d'électrolyse destiné à régénérer la couche au fur et à mesure de l'utilisation de l'électrode. Cette solution suppose une transformation de la machine, ainsi que l'adaptation du bain électrolytique à la vitesse de défilement du fil iirposée par l'usinage par électro-érosion, ce qui ne constitue pas un problème simple. Enfin l'entretien et la surveillance de la cellule ne sent pas du domaine du mécanicien utilisateur de la machine. C'est sans doute les raisons pour lesquelles de tels fils électrodes ne sont généralement pas régénérés sur la machine d'usinage par électro-érosion.Such electrodes are obtained by galvanic deposition of a metallic coating and are relatively expensive due to the speed of such a deposition process and the pollution problems inherent therein. However, the consumption of electrode is relatively high. To reduce the cost, it has been proposed to form an electrode with a closed loop and to pass a portion of this loop through an electrolysis tank intended to regenerate the layer as the electrode is used. This solution requires a transformation of the machine, as well as the adaptation of the electrolytic bath to the speed of travel of the wire iimposed by machining by electro-erosion, which is not a simple problem. Finally, the maintenance and monitoring of the cell does not belong to the domain of the mechanic who uses the machine. This is undoubtedly the reason why such electrode wires are generally not regenerated on the EDM machine.
Le but de la présente invention est d'apporter une solution à la fabrication de tels fils qui soit économiquement plus intéressante que celle proposée jusqu'ici. On connaît des procédés de revêtement de fil qui consistent à faire passer de bas en haut ce fil dans un bain de métal en fusion. De tels procédés permettent d'obtenir un fil revêtu d'une couche relativement épaisse du métal en fusion, à des vitesses élevées et avec un centrage parfait du revêtement par rapport à l'axe Ion gitudinal du fil. Un tel procédé fait notamment l'objet du brevet US 4169426.The purpose of the present invention is to provide a solution to the manufacture of such son which is economically more advantageous than that proposed so far. There are known processes for coating wire which consist in passing this wire from bottom to top in a bath of molten metal. Such methods make it possible to obtain a wire coated with a relatively thick layer of molten metal, at high speeds and with perfect centering of the coating with respect to the Ion axis. gitudinal of the wire. Such a process is in particular the subject of US patent 4,169,426.
La présente invention propose un procédé de fabrication à grande vitesse, d'électrodes filiformes pour l'usinage par électro-érosion du type susmentionné, basé en partie sur le ..procédé de revêtement à haute vitesse ci-dessus.The present invention provides a high speed manufacturing method of filamentary electrodes for EDM machining of the above type, based in part on the above high speed coating process.
A cet effet, la présente invention a pour objet un procédé de fabrication d'une électrode filiforme selon la revendication 1.To this end, the subject of the present invention is a method of manufacturing a filiform electrode according to claim 1.
Hbn seulement ce procédé de fabrication propose d'utiliser le procédé de revêtement à haute vitesse connu, mais il permet d'accroître encore très sensiblement la rentabilité du procédé de fabrication en soumettant le fil ainsi revêtu à une opération de tréfilage. Cette combinaison d'opérations de revêtement et de tréfilage en vue de produire des électrodes filiformes revêtues pour l'usinage par électro-érosion est rendue possible du fait que le procédé de revêtement permet de réaliser des couches relativement épaisses et également du fait que le tréfilage du fil revêtu est rendu possible en raison de la non formation, de composés inter-métalli- ques à l'interface, entre l'âme et le revêtement en raison de la haute vitesse du processus de revêtement à chaud. Il résulte de ce procédé que le coût de fabrication de tels électrodes filiformes revêtues en vue de l'usinage par électro-érosion peut être considérablement réduit compte tenu de l'augmentation sensible de la productivité. La figure unique du dessin annexé illustre très schématiquement et à titre d'exemple, une forme d'exécution d'une installation pour la mise en oeuvre du procédé objet de l'invention.Hbn only this manufacturing process proposes to use the known high-speed coating process, but it makes it possible to increase the profitability of the manufacturing process still very appreciably by subjecting the wire thus coated to a drawing operation. This combination of coating and drawing operations in order to produce coated filamentary electrodes for EDM machining is made possible by the fact that the coating process makes it possible to produce relatively thick layers and also by the fact that the drawing coated wire is made possible due to the non-formation of intermetallic compounds at the interface between the core and the coating due to the high speed of the hot coating process. It follows from this process that the manufacturing cost of such coated filiform electrodes for machining by electroerosion can be considerably reduced given the significant increase in productivity. The single figure of the accompanying drawing illustrates very schematically and by way of example, an embodiment of an installation for implementing the method which is the subject of the invention.
Cette installation cortporte un poste d'alimentation 1 destiné à délivrer le fil 2 à revêtir. Ce fil passe ensuite dans un poste de préchauffage 3 qui coπporte une alimentation de courant continu 4 par frotteurs 5 entre deux poulies 6. Ensuite, le fil 2 passe dans une buse 7 alimentée en métal en fusion par un creuset 8, dont le niveau de métal fondu est commandé par un piston plongeur 9. La buse 7 présente deux ouvertures 7a et 7b situées à l'aplomb l'une de l'autre dans. la trajection verticale du fil. Au-dessus de cette buse 7, se trouve une enceinte de refroidissement 10 alimentée par une circulation d'eau. A la sortie de cette enceinte, le fil 2 est conduit vers un poste de bobinage 11.This installation includes a feeding station 1 intended to deliver the wire 2 to be coated. This wire then passes through a preheating station 3 which coπporte a DC power supply 4 by wipers 5 between two pulleys 6. Then the wire 2 passes through a nozzle 7 supplied with molten metal by a crucible 8, the level of molten metal is controlled by a plunger piston 9. The nozzle 7 has two openings 7a and 7b located directly above one another in. the vertical trajection of the wire. Above this nozzle 7, there is a cooling enclosure 10 supplied with a circulation of water. On leaving this enclosure, the wire 2 is led to a winding station 11.
L'installation de tréfilage du fil revêtu n'est pas illustrée ici, étant donné qu'il s'agit d'une installation tout à fait classique. De même, l'installation de revêtement qui vient d'être décrite est, de préférence, précédée d'un poste de nettoyage dans lequel on fait passer le fil dans des solutions de dégraissage et, éventuellement, de décapage chimique, afin de garantir une bonne adhérence du revêtement. L'opération de nettoyage peut également être intercalée entre la sortie du poste d'alimentation et l'entrée du préchauffeur. Ce type de traitement est connu et ne fait pas directement partie de l'invention. C'est la raison pour laquelle il n'est ni décrit, ni représenté. Il suffit simplement de savoir que les opérations de nettoyage consistent à faire passer le fil dans une solution alkaline de dégraissage, de le rincer ensuite à l'eau courante, de le faire ensuite passer dans une solution acide de décapage, puis de le rincer à l'eau courante avant de le rincer à l'eau déionisée. Il y a lieu encore de préciser que l'opération de préchauffage dans le poste 3 se déroule dans une atmosphère inerte de N2, + H2, afin d'éviter l'oxydation du fil. Le principe du procédé de revêtement du fil 2 à travers la buse 7 consiste à faire passer le fil en le déplaçant de bas en haut et en maintenant le métal en fusion dans la buse 7 de sorte que le fil chaud est mouillé par le métal en fusion et entraîne une couche de métal à sa surface. Comme seule la mouillabilité du fil par le métal en fusion et le transfert thermique entrent en ligne de compte, l'épaisseur de la couche est égale tout autour de l'âme filiforme, de sorte que cette âme est parfaitement centrée. Par conséquent, l'opération de tréfilage à laquelle ce fil ainsi revêtu est appelé à être soumis permettra d'obtenir un fil revêtu dont l'âme sera parfaiterrent centrée.The wire drawing installation of the coated wire is not illustrated here, since it is a completely conventional installation. Likewise, the coating installation which has just been described is preferably preceded by a cleaning station in which the wire is passed through degreasing and, possibly, chemical pickling solutions, in order to guarantee a good coating adhesion. The cleaning operation can also be interposed between the outlet of the feed station and the inlet of the preheater. This type of treatment is known and is not directly part of the invention. This is the reason why it is neither described nor represented. You just need to know that the cleaning operations consist of passing the wire through an alkaline degreasing solution, then rinsing it under running water, then passing it through an acid pickling solution, then rinsing it with running water before rinsing it with deionized water. It should also be specified that the preheating operation in station 3 takes place in an inert atmosphere of N 2 , + H 2 , in order to avoid oxidation of the wire. The principle of the method of coating the wire 2 through the nozzle 7 consists in passing the wire by moving it from the bottom up and keeping the molten metal in the nozzle 7 so that the hot wire is wetted by the metal in fusion and brings a layer of metal to its surface. As only the wettability of the wire by the molten metal and thermal transfer are taken into account, the thickness of the layer is equal all around the filiform core, so that this core is perfectly centered. Consequently, the drawing operation to which this wire thus coated is called to be subjected will make it possible to obtain a coated wire whose core will be perfectly centered.
Ccπime on le verra par la suite, le choix des paramètres de fonctionnement peut être réalisé dans une gamme de vitesses et de températures assez large. De façon générale, plus la vitesse de défilement est grande et plus la température de préchauffage du fil est élevée, plus l'épaisseur de la couche du revêtement diminue. Il existe cependant une valeur maximum de l'épaisseur du revêtement pour un choix précis des paramètres de fonctionnement. Les fils utilisés pour réaliser les essais ont été des fils de laiton, coπpreπant 65% Cu, 35% Zn, 0,07% Pb, 0,05% FE, d'un diamètre de 0,63 mm. Les vitesses de défilement se sont situées entre 30 et 460 m/min. On a constaté que l'effet de la température de préchauffage se fait surtout sentir entre 30 et 150 m/min. Quant à l'effet de la vitesse sur l'épaisseur, celle-ci varie d'environ 150 irai à 30 m/min à environ 50 um à 460 m/min.As will be seen below, the choice of operating parameters can be made in a fairly wide range of speeds and temperatures. In general, the higher the running speed and the higher the preheating temperature of the wire, the more the thickness of the coating layer decreases. There is however a maximum value of the coating thickness for a precise choice of operating parameters. The wires used to carry out the tests were brass wires, coπpreπant 65% Cu, 35% Zn, 0.07% Pb, 0.05% FE, with a diameter of 0.63 mm. The running speeds were between 30 and 460 m / min. It has been found that the effect of the preheating temperature is felt mainly between 30 and 150 m / min. As for the effect of speed on the thickness, this varies from about 150 µm at 30 m / min to about 50 µm at 460 m / min.
Un autre facteur a fait l'objet d'une étude particulière: c'est celui de l'adhérence du revêtement sur le fil. Cette adhérence est premièrement fonction de la propreté du fil et tout le fil revêtu a subi le traitement de dégraissage et de décapage susmentionné. Deux autres facteurs influent sur l'adhérence, soit la température de préchauffage du fil et le teirps de contact du fil avec le bain de métal liquide ou la vitesse de défilement, ce qui revient au même. On a constaté que plus cette vitesse est élevée, plus la température de préchauffage doit l'être également.Another factor has been the subject of a particular study: that of the adhesion of the coating on the wire. This adhesion is firstly a function of the cleanliness of the wire and all the coated wire has undergone the aforementioned degreasing and pickling treatment. Two other factors influence the adhesion, namely the preheating temperature of the wire and the contact temperature of the wire with the bath of liquid metal or the running speed, which amounts to the same thing. It has been found that the higher this speed, the more the preheating temperature must be too.
Les fils revêtus en vue de réaliser des électrodes par tréfilage sont des fils de 0,63 mm et l'épaisseur de la couche de zinc déposée selon le procédé décrit est de l'ordre de 100 yum pour une vitesse de défilement de l'ordre de 150 à 200 m/min. A cette vitesse, la teπpérature de préchauffage doit être supérieure à 200°- 250°C pour assurer une bonne adhérence du revêtement.The wires coated in order to produce electrodes by drawing are wires of 0.63 mm and the thickness of the layer of zinc deposited according to the method described is of the order of 100 yum for a running speed of the order from 150 to 200 m / min. At this speed, the preheating temperature must be greater than 200 ° - 250 ° C to ensure good adhesion of the coating.
Lors de l'opération de tréfilage à froid, le fil revêtu a été amené d'un diamètre de l'ordre de 0,8 mm à un diamètre de 0,3 mm, constituant le fil destiné à être utilisé en tant qu'électrode dans un processus d'usinage par électro-érosion. Compte tenu de cette opération, la longueur du fil tréfilé est sept fois plus longue que celle du fil initial de sorte que la production d'électrode filiforme est de l'ordre de 1000 à 1400 m/min, ce qui donne un diamètre de l'âme de l'électrode de l'ordre de 0,22 mm avec un couche de zinc de l'ordre de 40 um. Il apparaît que, par rapport au procédé électrolytique, l'augmentation de la productivité est de l'ordre d'un facteur 100. En outre, on peut remarquer, des paramètres discutés précédemment, que ces valeurs ne constituent pas des limites maximales, mais qu'elles se situent dans une gamme moyenne de paramètres.During the cold drawing operation, the coated wire was brought from a diameter of the order of 0.8 mm to a diameter of 0.3 mm, constituting the wire intended to be used as an electrode in an EDM machining process. Given this operation, the length of the drawn wire is seven times longer than that of the initial wire so that the production of filiform electrode is of the order of 1000 to 1400 m / min, which gives a diameter of l the core of the electrode on the order of 0.22 mm with a layer of zinc on the order of 40 μm. It appears that, compared to the electrolytic process, the increase in productivity is of the order of a factor of 100. In addition, one can notice, from the parameters discussed previously, that these values do not constitute maximum limits, but that they fall within an average range of parameters.
Le procédé décrit n'est pas limité à l'usage du zinc, mais peut être mis en oeuvre avec tout autre métal ou alliage à bas point de fusion et à tension de vapeur élevée, tels que le cadmium et le magnésium ou des alliages de ces métaux. Le fil sur lequel le revêtement pourra être déposé pourra être en laiton ou en cuivre, en acier, ou en tout autre métal susceptible de résister à la température de travail et présentant une résistance à la traction et une conductibilité électrique appropriées. The process described is not limited to the use of zinc, but can be used with any other metal or alloy with a low melting point and a high vapor pressure, such as cadmium and magnesium or alloys of these metals. The wire on which the coating can be deposited may be made of brass or copper, steel, or any other metal capable of withstanding the working temperature and having an appropriate tensile strength and electrical conductivity.

Claims

REVEND ICAT IONRESELL ICAT ION
Procédé de fabrication d'une électrode filiforme pour l'usinage par électro-érosion conprenant une âme filiforme entourée d'une couche métallique, caractérisé par le fait que l'on choisit un élément filiforme de diamètre sensiblement supérieur à celui de ladite âme, que l'on préchauffe cet élément à une température située entre 110° et 350°C, que l'on fait défiler axialement l'élément au travers d'une enceinte remplie du métal fondu, destiné à forner ladite couche, verticalement et de bas en haut, au travers de deux ouvertures ménagées à l'aplomb l'une de l'autre dans des portionsopposées de la paroi de ladite enceinte, la vitesse de défilement de cet élément filiforme étant telle que le temps de séjour de chacune de ses portions ponctuelles dans ledit métal fondu soit inférieur à 5.10-2 seconde, et que, après solidification du revêtement, l'on soumet l'élément filiforme ainsi revêtu à une opération de tréfilage pour amener tant le diamètre de l'élément filiforme que l'épaisseur du revêtement aux valeurs souhaitées pour l'électrode a obtenir. Method for manufacturing a filiform electrode for EDM machining comprising a filiform core surrounded by a metallic layer, characterized in that a filiform element is chosen whose diameter is substantially greater than that of said core, this element is preheated to a temperature between 110 ° and 350 ° C, which is scrolled axially through an enclosure filled with molten metal, intended to form said layer, vertically and from below high, through two openings plumb with each other in opposite portions of the wall of said enclosure, the speed of travel of this filiform element being such that the residence time of each of its punctual portions in said molten metal is less than 5.10 -2 seconds, and that, after solidification of the coating, the filiform element thus coated is subjected to a drawing operation to bring both the diameter meter of the filiform element as the coating thickness at the desired values for the electrode to be obtained.
PCT/CH1985/000101 1985-06-21 1985-06-21 Method for fabricating a filiform electrode for electro-erosion machining WO1986007552A1 (en)

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PCT/CH1985/000101 WO1986007552A1 (en) 1985-06-21 1985-06-21 Method for fabricating a filiform electrode for electro-erosion machining
EP19850902948 EP0227645A1 (en) 1985-06-21 1985-06-21 Method for fabricating a filiform electrode for electro-erosion machining

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PCT/CH1985/000101 WO1986007552A1 (en) 1985-06-21 1985-06-21 Method for fabricating a filiform electrode for electro-erosion machining

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140357015A1 (en) * 2011-09-29 2014-12-04 Neturen Co., Ltd. Method and apparatus for manufacturing lead wire for solar cell

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR1464775A (en) * 1965-11-23 1967-01-06 Soudure Autogene Francaise Surface treatment process for steel wires which can be used in particular in welding
DE2733075A1 (en) * 1976-07-20 1978-04-13 Battelle Memorial Institute PROCESS FOR COATING A WIRE-SHAPED OBJECT WITH A THERMAL FUSIBLE MATERIAL
JPS59134623A (en) * 1983-01-18 1984-08-02 Sumitomo Electric Ind Ltd Composite electrode wire for wire-cut electric discharge machining and preparation thereof

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Publication number Priority date Publication date Assignee Title
FR1464775A (en) * 1965-11-23 1967-01-06 Soudure Autogene Francaise Surface treatment process for steel wires which can be used in particular in welding
DE2733075A1 (en) * 1976-07-20 1978-04-13 Battelle Memorial Institute PROCESS FOR COATING A WIRE-SHAPED OBJECT WITH A THERMAL FUSIBLE MATERIAL
JPS59134623A (en) * 1983-01-18 1984-08-02 Sumitomo Electric Ind Ltd Composite electrode wire for wire-cut electric discharge machining and preparation thereof

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Title
PATENTS ABSTRACTS OF JAPAN, Volume 8, No. 263, 4 December 1984, page 1700-M-342 & JP, A, 59134623 (Sumitomo) 2 August 1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140357015A1 (en) * 2011-09-29 2014-12-04 Neturen Co., Ltd. Method and apparatus for manufacturing lead wire for solar cell
US9991410B2 (en) * 2011-09-29 2018-06-05 Neturen Co., Ltd. Method and apparatus for manufacturing lead wire for solar cell

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