WO2020091130A1 - Fil d'électrode pour usinage à décharge électrique et son procédé de fabrication - Google Patents

Fil d'électrode pour usinage à décharge électrique et son procédé de fabrication Download PDF

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Publication number
WO2020091130A1
WO2020091130A1 PCT/KR2018/014023 KR2018014023W WO2020091130A1 WO 2020091130 A1 WO2020091130 A1 WO 2020091130A1 KR 2018014023 W KR2018014023 W KR 2018014023W WO 2020091130 A1 WO2020091130 A1 WO 2020091130A1
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WO
WIPO (PCT)
Prior art keywords
layer
zinc
nickel
wire
forming
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.)
Ceased
Application number
PCT/KR2018/014023
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English (en)
Korean (ko)
Inventor
황장익
임종국
이재창
장해섭
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.)
PUNG KUK CO Ltd
Original Assignee
PUNG KUK CO Ltd
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 PUNG KUK CO Ltd filed Critical PUNG KUK CO Ltd
Publication of WO2020091130A1 publication Critical patent/WO2020091130A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • B23H1/06—Electrode material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment

Definitions

  • the present invention relates to an electrode wire for electric discharge processing and a method for manufacturing the same, and more particularly, to an electrode wire for electric discharge processing having a coating layer formed on the core wire and a method for manufacturing the same.
  • Electric Discharge Machining is a machining method that cuts or cuts a workpiece using sparks generated by generating discharge between the traveling electrode wire and the workpiece.
  • the electrode wire for electric discharge machining is consumable, and this electric discharge machining technique has an absolute influence on the machining of difficult-to-cut hard materials and high-hardness heat-treated mold materials and the asymmetric shape mold processing technology.
  • the mold technology has also been developed, and the electrode wire for discharge processing has been continuously developed to improve the precision of the mold and the processing speed.
  • an electrode wire in the form of a core wire and forming a coating layer having a thickness of several micrometers on its surface is disclosed.
  • electrode wires produced by using brass as a core wire and diffusing heat treatment after electroplating or hot dip galvanizing zinc on the surface thereof are typical.
  • the coating layer of such an electrode wire is composed of a pure galvanized layer or a diffusion layer, the tensile strength is insufficient, and when the applied contact pressure is increased, disconnection is likely to occur, resulting in poor processing speed and workability, and deformation due to aging hardening of the connective tissue between copper and zinc. Due to the decrease in straightness due to the lowering of the automatic connection rate, there is a limitation in high precision and unmanned processing.
  • An object of the present invention is to improve the tensile strength and straightness and suppress the generation of dust, to provide an electrode wire for electrical discharge machining and a method for manufacturing the same, which can improve processing speed, machining precision, automatic connection rate and workability during electrical discharge machining. will be.
  • An electrode wire for electric discharge machining in which a coating layer is formed on the surface of the core wire, wherein the coating layer is an alloy layer of nickel and zinc.
  • a method for manufacturing an electrode wire for electric discharge processing which is produced by reducing the thickness after forming a coating layer on the surface of the core wire, wherein the formation of the coating layer comprises: forming a nickel layer on the surface of the core wire; Forming a zinc layer on the nickel surface; And forming an alloy layer of nickel and zinc through diffusion heat treatment.
  • the thickness of the zinc layer is 6 ⁇ 12 ⁇ m characterized in that the electrode wire manufacturing method of the discharge processing, characterized in that (4).
  • Figure 2 is a process diagram of a method for manufacturing an electrode wire for electric discharge processing according to the present invention.
  • the present invention relates to an electrode wire for electric discharge processing and a method for manufacturing the electrode wire, wherein the electrode wire has a structure in which a coating layer is formed on the surface of the core wire, and the coating layer is an alloy layer of nickel and zinc.
  • the forming of the coating layer may include forming a nickel layer on the core wire surface; Forming a zinc layer on the nickel surface; And forming an alloy layer of nickel and zinc through diffusion heat treatment.
  • the electrode wire of the present invention is advantageous for automating and unmanning discharge processing by improving tensile strength and straightness and improving automatic connection rate.
  • FIG. 1 shows a cross-sectional structure diagram of an electrode line for discharge processing according to the present invention (hereinafter abbreviated as 'electrode line'), and FIG. 2 shows a flowchart for a method of manufacturing an electrode line according to the present invention.
  • the coating layer is an alloy layer of nickel and zinc, and is formed by sequentially forming a nickel layer and a zinc layer on the surface of the core wire and then diffusing heat.
  • the nickel layer of the coating layer improves the adhesion with a core wire base material such as brass, which is a kind of copper alloy
  • the zinc layer of the coating layer has a high affinity with the nickel layer, so that the middle of the core layer and the outermost layer zinc layer
  • the presence of a nickel layer has the effect of improving the overall adhesion of the coating layer composed of the nickel layer and the zinc layer.
  • the nickel layer may reduce the amount of de-zinc generated from the brass busbar and the zinc layer, which are core wires during diffusion heat treatment.
  • the zinc layer when the zinc layer is directly formed on the brass busbar and diffusion is performed, diffusion between the brass and zinc atoms occurs, thereby obtaining a brass plated layer having a new composition with a high zinc content near the surface of the final electrode wire.
  • de-zinc phenomenon in which zinc evaporates from the brass and galvanized layers may occur.
  • the presence of a nickel plating layer in the middle prevents dezincification due to the formation of a copper-nickel-zinc alloy having excellent interatomic affinity and obtains a healthy plating layer with high adhesion of the plating layer.
  • the present invention it can be seen that it has a relatively high adhesion to a plated layer of a brass wire without a nickel layer, and this effect brings about an improvement in tensile strength because of its high resistance to shear stress applied to the plated layer during the tensile test.
  • the nickel layer and the zinc layer are too thin, the adhesion to the core wire is good, but the diffusion of copper atoms from the core wire is faster, and the surface of the electrode wire is made of an alloy of copper / zinc / nickel, which is similar to the existing simple zinc plated electrode wire. It becomes a wire.
  • the nickel content is high, the diffusion movement speed of the core and zinc layers is low, so the fluxing effect during wire discharge processing is low, and the effect of improving the processing speed, which is the object of the present invention, cannot be expected.
  • the brass busbar constituting the core wire of the electrode wire is present in the ⁇ phase, the *? * Phase, and the ⁇ phase depending on the zinc content, and the higher the zinc content, the higher the hardness, susceptible to cracking, and easily de-zinc occurs.
  • the addition of the third nickel layer to the coating layer also has an advantage in that zinc equivalent is relatively reduced due to solid solution with copper. That is, by adding nickel, less cracking of the plating layer due to high zinc content occurs during fresh processing or diffusion treatment, and as described above, it has an effect of increasing the tensile strength of the present invention due to the synergistic effect of the plating layer. .
  • the formation of the nickel layer and the zinc layer is not particularly limited, and may be, for example, hot-dip plating or electroplating.
  • the nickel layer and the zinc layer are not shown in the drawing when forming, a washing, drying or coiling process such as degreasing, washing, pickling or ultrasonic waves may be carried out as in the prior art.
  • the weight ratio of nickel to zinc is controlled from 2: 8 to 3: 7.
  • the thickness of the nickel layer in the coating layer is preferably 2 to 4 ⁇ m
  • the thickness of the zinc layer is preferably controlled to 6 to 12 ⁇ m.
  • the heat treatment is controlled according to the composition of the weight ratio of nickel to zinc and is preferably performed for 6 hours or more at a temperature of 420 to 450 ° C in a vacuum furnace.
  • Table 1 is the tensile strength test results data.
  • the tensile strength of the present invention is higher than that of the 65 / 35Zn brass wire and the 60 / 40Zn brass wire, and the breaking load is large and the tensile strength is large.
  • Table 2 shows the results of the processing speed experiment.
  • the processing speed of the present invention is faster than that of the 65 / 35Zn brass wire and the 60 / 40Zn brass wire, and the processing time is shortened.
  • the processing equipment model was tested with SODICK 600G, the material was SKD-11, and the processing speed per minute was mm2 / min.
  • the workpiece was tested at 10 * 10 * 32T division 65 / 37Zn brass wire Gamma brass wire
  • the present invention Remark Processing speed 3.31 3.73 4.2 21.4% UP Processing time 31'15 " 28'40 " 25'20 "
  • Table 3 shows the results of the automatic connection rate experiment.
  • the automatic connection rate of the present invention is higher than that of the 65 / 35Zn brass wire and the 60 / 40Zn brass wire.
  • Table 4 shows the results of the processing precision experiment.
  • the processing precision of the present invention is uniformly higher in the upper, middle, and lower parts compared to the 65 / 35Zn brass wire and the 60 / 40Zn brass wire.
  • the present invention relates to an electrode wire for electric discharge processing and a method for manufacturing the same, and is used for cutting or cutting a workpiece using sparks generated by generating discharge between the traveling electrode wire and the workpiece.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

La présente invention concerne un fil d'électrode pour un usinage à décharge électrique et son procédé de fabrication. Le fil d'électrode a une structure dans laquelle une couche de revêtement est formée sur la surface d'un fil d'âme, la couche de revêtement étant une couche d'alliage de nickel et de zinc. La couche de revêtement peut être formée par les étapes consistant à : former une couche de nickel sur la surface du fil d'âme ; former une couche de zinc sur la surface de la couche de nickel ; et former une couche d'alliage de nickel et de zinc par traitement thermique de diffusion. Le fil d'électrode et son procédé de fabrication selon l'invention peuvent, en formant la couche de nickel ayant un point de fusion élevé et une dureté élevée à l'étape précédent l'étape consistant à former la couche de zinc, puis en appliquant un traitement thermique de diffusion à la couche de nickel de façon à former une couche d'alliage de nickel-zinc étroitement liée sur la surface de fil d'âme, résister à une chaleur élevée générée pendant l'usinage par décharge électrique, augmenter une tension appliquée et améliorer un effet de rinçage, un taux de câblage automatique par durcissement de surface et une fonction de maintien d'une surface de moule propre.
PCT/KR2018/014023 2018-10-31 2018-11-15 Fil d'électrode pour usinage à décharge électrique et son procédé de fabrication Ceased WO2020091130A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180132139A KR20200049183A (ko) 2018-10-31 2018-10-31 방전가공용 전극선 및 그 제조방법
KR10-2018-0132139 2018-10-31

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WO2020091130A1 true WO2020091130A1 (fr) 2020-05-07

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PCT/KR2018/014023 Ceased WO2020091130A1 (fr) 2018-10-31 2018-11-15 Fil d'électrode pour usinage à décharge électrique et son procédé de fabrication

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WO (1) WO2020091130A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2942350B2 (ja) * 1990-11-28 1999-08-30 住友電気工業株式会社 ワイヤ放電加工用電極線
US5945010A (en) * 1997-09-02 1999-08-31 Composite Concepts Company, Inc. Electrode wire for use in electric discharge machining and process for preparing same
KR20000059366A (ko) * 1999-03-03 2000-10-05 황해웅 방전가공기 전극선용 동-아연-니켈계 합금 및 그 제조방법
JP2005329504A (ja) * 2004-05-20 2005-12-02 Hitachi Cable Ltd ワイヤ放電加工用電極線及びそれを用いて製造した放電加工物
KR101486028B1 (ko) * 2010-06-04 2015-01-22 스즈끼 긴조꾸 고교가부시끼가이샤 방전 가공용 전극선

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833875B1 (fr) 2001-12-21 2004-07-02 Thermocompact Sa Fil pour electroerosion a grande vitesse d'usinage
JP4479270B2 (ja) 2004-02-20 2010-06-09 日立電線株式会社 ワイヤ放電加工用電極線の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2942350B2 (ja) * 1990-11-28 1999-08-30 住友電気工業株式会社 ワイヤ放電加工用電極線
US5945010A (en) * 1997-09-02 1999-08-31 Composite Concepts Company, Inc. Electrode wire for use in electric discharge machining and process for preparing same
KR20000059366A (ko) * 1999-03-03 2000-10-05 황해웅 방전가공기 전극선용 동-아연-니켈계 합금 및 그 제조방법
JP2005329504A (ja) * 2004-05-20 2005-12-02 Hitachi Cable Ltd ワイヤ放電加工用電極線及びそれを用いて製造した放電加工物
KR101486028B1 (ko) * 2010-06-04 2015-01-22 스즈끼 긴조꾸 고교가부시끼가이샤 방전 가공용 전극선

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