WO2000029159A1 - Procede de traitement de surface par decharge - Google Patents

Procede de traitement de surface par decharge Download PDF

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Publication number
WO2000029159A1
WO2000029159A1 PCT/JP1998/005108 JP9805108W WO0029159A1 WO 2000029159 A1 WO2000029159 A1 WO 2000029159A1 JP 9805108 W JP9805108 W JP 9805108W WO 0029159 A1 WO0029159 A1 WO 0029159A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
discharge
green compact
work
treatment method
Prior art date
Application number
PCT/JP1998/005108
Other languages
English (en)
Japanese (ja)
Inventor
Akihiro Goto
Toshio Moro
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to DE19883020T priority Critical patent/DE19883020T1/de
Priority to PCT/JP1998/005108 priority patent/WO2000029159A1/fr
Priority to CN98814313A priority patent/CN1322161A/zh
Priority to KR1020017005677A priority patent/KR20010107943A/ko
Publication of WO2000029159A1 publication Critical patent/WO2000029159A1/fr

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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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a discharge surface treatment method, and more particularly, to a discharge surface treatment method for forming a hard film on a work surface by using a consumable dissolved substance of a discharge electrode generated by discharge energy.
  • the surface treatment method for forming a hard coating with a material is disclosed in Japanese Patent Application Laid-Open Publication Nos. Hei 8-30022, Hei 9-1989, Hei 9-1989. 37 No. 7).
  • the conventional discharge surface treatment method forms a hard carbide coating on the workpiece by the reaction between the electrode material and C (carbon) formed by the decomposition of the components in the working fluid by the heat of the discharge.
  • a machining fluid an oil containing a large amount of carbon components, such as a kerosene-based electric discharge machining fluid, is used.
  • processing fluid is oil, it is troublesome to handle, and it is necessary to dispose of the waste fluid for environmental protection.
  • the present invention has been made to solve the above-mentioned problems, and has excellent handleability of a machining fluid, does not require a special waste liquid treatment for environmental protection, and has a low surface cost. It is an object of the present invention to provide a discharge surface treatment method capable of forming a hard coating on a surface. Disclosure of the invention
  • water is used as a working fluid, and a pulse voltage is applied between a workpiece and a green compact electrode obtained by compression-molding a powder material containing a metal carbide, nitride, or boride powder in the working fluid. It is possible to provide a discharge surface treatment method in which a discharge is generated, an electrode consumable dissolved material of a green compact electrode generated by discharge energy is deposited on a work surface, and a hard film is formed on the work surface using an electrode material. .
  • a hard coating can be formed by only the electrode material without generating components and reactants in the working fluid. This means that the components of the hard coating can be strictly controlled by the electrode material components.
  • the processing liquid is water, it is not necessary to perform a special waste liquid treatment for environmental protection, and a hard film can be formed on the work surface at low cost.
  • the present invention is characterized in that the green compact electrode, WC, Ti C, TaC, ZrC, S i C, metal carbide or T i N of VC or the like, nitride such as ZrN or Ti B 2, Zr B 2, etc.
  • the present invention can provide a discharge surface treatment method which is a green compact electrode obtained by compression-molding a powder material containing the boride powder.
  • WC, T i C, Ta C, Z r C :, S i C :, VC like metal carbide walking is TiN, Les with nitrides such as Z r N, the T i B 2, Z r B A hard film made of boride such as 2 or a combination thereof can be formed on the work surface.
  • FIG. 1 is a configuration diagram of an electric discharge machining apparatus used for performing an electric discharge surface treatment method according to the present invention.
  • 1 is a processing tank for storing water (tap water, pure water) as a processing liquid
  • Reference numeral 3 denotes a discharge electrode
  • reference numeral 5 denotes a power supply for applying a discharge voltage between the discharge electrode 3 and the workpiece 100 arranged in the machining tank 1
  • reference numeral 7 denotes a power supply between the discharge electrode 3 and the workpiece 100.
  • Reference numeral 9 denotes a switching element for switching the discharge voltage and current applied to the switching element
  • 9 denotes a control circuit for controlling on / off of the switching element 7
  • 11 denotes a resistor.
  • the discharge electrode 3 is composed of a green compact electrode formed by compression-molding a powder obtained by mixing a TiN powder and a C0 powder.
  • Electrodes 3 WC, T i C, T a C, Z r C :, S i C, metal carbide or T i N of VC or the like, Z r nitrides such as N or T i B 2, Z r B 2 such green compact electrode and the powder material by compression molding comprising a powder of boride is contemplated.
  • the gap between the discharge electrode 3 and the workpiece 100 ie, the gap between the discharge electrode 3 and the workpiece 100, is set in the machining fluid by a well-known position control mechanism (not shown) provided in a normal electric discharge machining apparatus. (100 ⁇ 111 to several 100 ⁇ m), a discharge voltage is intermittently applied between the discharge electrode 3 and the work 100, and the water is applied between the discharge electrode 3 and the work 100 in water. A pulse-like discharge is generated.
  • the discharge electrode 3 is consumed by the energy of this discharge, and the electrode depleted molten material of the discharge electrode 3 adheres and deposits on the work surface of the work 100, and WC ;, T i C. T a C, Z r C :, S i C ;, VC like metal carbide or T i N, Z r nitrides such as N or T i B 2, Z r B 2 hard coating 1 0 by boride or combination thereof, such as 1 is formed.
  • T i N be used Z r nitride or T i B 2 such as N, Z r discharge electrode 3 by borides 2 etc. B, in the discharge in oil will be the electrode material becomes a carbide, Although it is difficult to form a nitride / boride film, the discharge surface treatment method according to the present invention performs the treatment in water, so that the electrode material does not become carbide and a film of the electrode material can be formed. Thus, the components of the hard coating can be strictly controlled by the electrode material components, and the hard coating of the desired component can be reliably formed.
  • processing fluid is tap water and pure water
  • special waste liquid treatment for environmental conservation is required. There is no need to perform this step, and a hard film can be formed on the work surface at a lower cost than when the working fluid is oil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

La présente invention concerne une décharge qui s'obtient en appliquant une tension pulsée entre une pièce et une électrode compacte verte produite par le tassement, dans un liquide de travail tel que de l'eau, d'un matériau poudreux renfermant une poudre de carbure de métal, notamment WC, TiC. TaC, ZrC, Sic ou VC, de nitrure, notamment TiN ou ZrN, ou d'un borure, notamment TiB2 ou RrB2. La substance fondue résultant de l'usure de l'électrode compacte verte est déposé sur la surface d'un objet sous forme de revêtement dur.
PCT/JP1998/005108 1998-11-13 1998-11-13 Procede de traitement de surface par decharge WO2000029159A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19883020T DE19883020T1 (de) 1998-11-13 1998-11-13 Entladungsoberflächen-Behandlungsverfahren
PCT/JP1998/005108 WO2000029159A1 (fr) 1998-11-13 1998-11-13 Procede de traitement de surface par decharge
CN98814313A CN1322161A (zh) 1998-11-13 1998-11-13 放电表面处理方法
KR1020017005677A KR20010107943A (ko) 1998-11-13 1998-11-13 방전표면처리방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1998/005108 WO2000029159A1 (fr) 1998-11-13 1998-11-13 Procede de traitement de surface par decharge

Publications (1)

Publication Number Publication Date
WO2000029159A1 true WO2000029159A1 (fr) 2000-05-25

Family

ID=14209393

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/005108 WO2000029159A1 (fr) 1998-11-13 1998-11-13 Procede de traitement de surface par decharge

Country Status (4)

Country Link
KR (1) KR20010107943A (fr)
CN (1) CN1322161A (fr)
DE (1) DE19883020T1 (fr)
WO (1) WO2000029159A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6723389B2 (en) 2000-07-21 2004-04-20 Toshiba Tungaloy Co., Ltd. Process for producing coated cemented carbide excellent in peel strength
US6793982B1 (en) * 1998-05-13 2004-09-21 Mitsubishi Denki Kabushiki Kaisha Electrode of green compact for discharge surface treatment, method of producing the same, method of discarge surface treatment, apparatus therefor, and method of recycling electrode of green compact for discharge surface treatment
JP2005213555A (ja) * 2004-01-29 2005-08-11 Mitsubishi Electric Corp 放電表面処理用電極および放電表面処理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1630254B1 (fr) 2003-05-29 2013-03-13 Mitsubishi Denki Kabushiki Kaisha Electrode pour traitement de surface par decharge, procede de traitement de surface par decharge et appareil de traitement de surface par decharge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09192937A (ja) * 1996-01-17 1997-07-29 Res Dev Corp Of Japan 液中放電による表面処理方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09192937A (ja) * 1996-01-17 1997-07-29 Res Dev Corp Of Japan 液中放電による表面処理方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6793982B1 (en) * 1998-05-13 2004-09-21 Mitsubishi Denki Kabushiki Kaisha Electrode of green compact for discharge surface treatment, method of producing the same, method of discarge surface treatment, apparatus therefor, and method of recycling electrode of green compact for discharge surface treatment
US6723389B2 (en) 2000-07-21 2004-04-20 Toshiba Tungaloy Co., Ltd. Process for producing coated cemented carbide excellent in peel strength
JP2005213555A (ja) * 2004-01-29 2005-08-11 Mitsubishi Electric Corp 放電表面処理用電極および放電表面処理方法
JP4608220B2 (ja) * 2004-01-29 2011-01-12 三菱電機株式会社 放電表面処理用電極および放電表面処理方法

Also Published As

Publication number Publication date
CN1322161A (zh) 2001-11-14
KR20010107943A (ko) 2001-12-07
DE19883020T1 (de) 2002-04-25

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