[go: up one dir, main page]

WO2000050194A1 - Procede et dispositif de traitement de surface par decharge - Google Patents

Procede et dispositif de traitement de surface par decharge Download PDF

Info

Publication number
WO2000050194A1
WO2000050194A1 PCT/JP1999/000822 JP9900822W WO0050194A1 WO 2000050194 A1 WO2000050194 A1 WO 2000050194A1 JP 9900822 W JP9900822 W JP 9900822W WO 0050194 A1 WO0050194 A1 WO 0050194A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
surface treatment
electrode
discharge
discharge surface
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/JP1999/000822
Other languages
English (en)
Japanese (ja)
Inventor
Naotake Mohri
Manabu Yoshida
Akihiro Goto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Priority to CH01573/01A priority Critical patent/CH694246A5/de
Priority to CN99814043A priority patent/CN1126628C/zh
Priority to PCT/JP1999/000822 priority patent/WO2000050194A1/fr
Priority to JP2000600798A priority patent/JP5547864B2/ja
Priority to DE19983777T priority patent/DE19983777T1/de
Priority to TW088104284A priority patent/TW475005B/zh
Publication of WO2000050194A1 publication Critical patent/WO2000050194A1/fr
Priority to US09/872,421 priority patent/US6929829B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate

Definitions

  • the present invention relates to an improved discharge surface treatment method and apparatus for generating a discharge between an electrode and a workpiece and forming a hard coating on the surface of the workpiece by the discharge energy.
  • FIG. 1 is T i H 2 compression molded to become a green compact electrode
  • 2 is the pressure E was 3 machining tank
  • a switching element for switching the applied voltage and current 6 is a control circuit for controlling on / off of the switching element 5
  • 7 is a power supply
  • 8 is a resistor
  • 9 is a formed hard film.
  • Japanese Patent Application Laid-Open No. H10-2252584 discloses that a discharge is generated by using a material that produces a carbide having high hardness such as Ti, V, Nb, and Ta as an anode. After decarburizing the surface of the workpiece to make it a slightly rough surface (pretreatment), discharge is generated by a TiH2-based green compact electrode to perform the surface treatment of the workpiece (this treatment) The method is disclosed. The purpose of this pretreatment is to improve the adhesion of the coating material in the present treatment. For the same purpose, the pre-treatment is performed under the condition that the Ti H 2 type compact electrode has a negative polarity and the discharge energy is relatively small, and then the discharge energy is increased, so that the same electrode T i H 2 is used. A method of performing this treatment using a two-system compacted electrode is disclosed.
  • the above conventional techniques are characterized by using a green compact electrode in any case, but have problems in practical use for the following three reasons.
  • the first reason is that it is difficult to form electrodes of practical size.
  • the pressing ability in order to form the electrode into a practical size that can be used for surface treatment of a mold or the like, the pressing ability must be dramatically increased, and the pressure of the material during compression molding of the powdery material must be increased. Since it does not propagate uniformly inside, the unevenness of density becomes large and defects such as cracks occur.
  • the formed green compact electrode is easily deformed and difficult to perform secondary processing, and the hard coating formed on the workpiece is uneven and deteriorates in quality.
  • the second reason is that it is difficult to handle electrode materials.
  • the present invention has been made in order to solve the problems of the prior art as described above, and can form a hard coating on a workpiece efficiently, can easily form an electrode, and can freely form an electrode. It is an object of the present invention to provide a method and apparatus for treating a discharge surface which can form a hard coating in a large area within a range of the area and can be applied to various machine parts such as molds, tools, and machine element parts. I do.
  • the discharge surface treatment method according to the first invention is characterized in that a powder produced by singly or in combination of a plurality of carbides of metals belonging to Groups IVa, Va, and Via of the periodic table, and an iron group metal powder or a workpiece.
  • a non-ferrous metal powder of the same component is mixed alone or in combination, and after compression molding, a pre-sintered sintered electrode is used as the discharge electrode, and the discharge surface treatment is performed directly on the base material of the workpiece.
  • the electrical conditions and the electrical conditions for applying a discharge surface treatment to the formed hard coating are changed according to the characteristics of the material to be treated.
  • the discharge surface treatment method according to the second invention is characterized in that a powder produced by singly or in combination of a plurality of carbides of metals belonging to Groups IVa, Va, and Via of the periodic table, and an iron group metal powder or a workpiece.
  • a powder produced by singly or in combination of a plurality of carbides of metals belonging to Groups IVa, Va, and Via of the periodic table, and an iron group metal powder or a workpiece Single or multiple non-ferrous metal powders of the same component
  • a sintered electrode that is mixed and mixed, pre-sintered after compression molding is used as an electrode for discharge application, and the electrical conditions for applying a discharge surface treatment to the formed hard coating at least once according to the characteristics of the material to be treated To change.
  • the discharge surface treatment method according to the third invention is characterized in that a powder produced by singly or in combination of a plurality of gold bending carbides bending to the groups IVa, Va, and Via in the periodic table is made of iron group gold powder or a work piece.
  • Non-ferrous metal powder of the same component as the product is mixed alone or in combination, and the sintered electrode pre-sintered after compression molding is used as the electrode for discharge application, and the discharge material is directly subjected to the discharge surface treatment on the base material of the workpiece.
  • the electrical conditions at the time and the electrical conditions at the time of performing the discharge surface treatment on the formed hard coating are changed according to the characteristics of the material to be treated, and the electrical conditions at the time of performing the discharge surface treatment on the formed hard coating are changed.
  • the electrical conditions are changed at least once according to the characteristics of the material to be treated.
  • a discharge surface treatment method according to a fourth invention is the discharge surface treatment method according to the first invention, wherein an inert gas is interposed between the sintered electrode and the workpiece.
  • a discharge surface treatment method according to a fifth invention is the discharge surface treatment method according to the second invention, wherein an inert gas is interposed between the sintered electrode and the workpiece.
  • a discharge surface treatment method according to a sixth invention is the discharge surface treatment method according to the third invention, wherein an inert gas is interposed between the sintered electrode and the workpiece.
  • a discharge surface treatment method is the discharge surface treatment method according to the first aspect, wherein the sintered electrode is scanned with respect to the workpiece, and the hard electrode is formed on the surface of the workpiece. A film is formed.
  • An electric discharge surface treatment method is the electric discharge surface treatment method according to the second invention, wherein the sintered electrode is scanned with respect to the workpiece, The hard coating is formed on the surface of the workpiece.
  • a discharge surface treatment method according to a ninth invention is the discharge surface treatment method according to the third invention, wherein the sintered electrode is scanned with respect to the workpiece, and the sintered electrode is scanned on the surface of the workpiece. It forms a hard coating.
  • the discharge surface treatment apparatus provides an iron surface metal powder or a workpiece to be manufactured by powdering a single or a plurality of carbides of metals belonging to Groups IVa, Va, and VIa of the periodic table.
  • Non-ferrous metal powder of the same component as the product is mixed alone or in combination, and the sintered electrode pre-sintered after compression molding is used as the electrode for discharge application, and the discharge material is directly subjected to the discharge surface treatment on the base material of the workpiece.
  • a switching means is provided for changing the electrical conditions at the time and the electrical conditions at the time of performing the discharge surface treatment on the formed hard coating in accordance with the characteristics of the material to be treated.
  • the discharge surface treatment apparatus provides an iron surface metal powder or a workpiece to a powder produced by using a single or a plurality of carbides of metals belonging to Groups IVa, Va, and VIa of the periodic table.
  • Non-ferrous metal powders of the same composition as above, mixed alone or in combination, are subjected to compression molding and then pre-sintered sintered electrodes are used as discharge electrodes, and the electrical conditions when the formed hard coating is subjected to discharge surface treatment
  • a switching means for changing at least once according to the characteristics of the material to be processed is provided.
  • a discharge surface treatment apparatus provides an iron surface metal powder or a work piece to a powder produced by using a single or a plurality of carbides of metals belonging to Groups IVa, Va, and VIa of the periodic table.
  • a non-ferrous metal powder of the same component as above is mixed alone or in combination, a sintered electrode pre-sintered after compression molding is used as an electrode for electric discharge, and the electric discharge surface treatment is performed directly on the base material of the workpiece.
  • First switching means for changing the electrical conditions of the above and the electrical conditions when the formed hard film is subjected to the discharge surface treatment in accordance with the characteristics of the material to be treated; and the discharge surface treatment for the formed hard film. The electrical conditions during the process according to the characteristics of the material to be treated.
  • a second switching means for changing at least once is provided.
  • a discharge surface treatment apparatus is the discharge surface treatment apparatus according to the tenth aspect, wherein an inert gas is supplied between the sintered electrode and the workpiece. Means.
  • a discharge surface treatment apparatus is the discharge surface treatment apparatus according to the eleventh aspect, wherein an inert gas is supplied between the sintered electrode and the workpiece. Means.
  • the discharge surface treatment apparatus is the discharge surface treatment apparatus according to the twenty-second aspect, wherein an inert gas is supplied between the sintered electrode and the workpiece. Means.
  • the discharge surface treatment apparatus is the discharge surface treatment apparatus according to the tenth aspect, wherein the sintered electrode and the workpiece are relatively moved in the X, Y, and Z directions.
  • the sintered electrode is formed by the X-axis driving device, the Y-axis driving device, and the Z-axis driving device. To form the hard coating on the surface of the workpiece.
  • the discharge surface treatment apparatus is the discharge surface treatment apparatus according to the eleventh aspect, wherein the sintered electrode and the workpiece are relatively moved in the X direction, the Y direction, and the Z direction.
  • the sintered electrode is formed by the X-axis driving device, the Y-axis driving device, and the Z-axis driving device. To form the hard coating on the surface of the workpiece.
  • the discharge surface treatment apparatus is the discharge surface treatment apparatus according to the twenty-second aspect, wherein the sintered electrode and the workpiece are relatively moved in the X, Y, and Z directions.
  • the hard electrode is formed on the surface of the workpiece by scanning the workpiece with the sintered electrode by a driving device.
  • the surface treatment method according to the first to third aspects of the present invention can easily form an electrode and efficiently form a hard coating with high adhesion to a workpiece, and can provide a mold, This has the effect of providing a discharge surface treatment method that can be applied to various machine parts such as tools and machine element parts. Also, since a hard coating can be deposited on the workpiece in an area approximately equal to the area of the electrode, there is also an effect that masking processing is not required.
  • the discharge surface treatment method of the fourth invention has an effect of simplifying the configuration in addition to the effect of the first invention.
  • the discharge surface treatment method of the fifth invention has an effect of simplifying the configuration in addition to the effect of the second invention.
  • the discharge surface treatment method of the sixth invention has an effect of simplifying the configuration in addition to the effect of the third invention.
  • processing can be performed while scanning using a small-sized sintered electrode, and a large-sized sintered electrode of a specific shape is used. There is no need to scan the small-sized sintered electrode over the entire curved surface of the workpiece having a three-dimensional free-form surface such as a mold, and it is hard over the entire area, or hard while changing the film thickness as necessary There is an effect that a film can be formed.
  • processing can be performed while scanning using a small sintered electrode, and a large specific shaped sintered electrode is used. There is no need to scan the small sintered electrode over the entire curved surface of a workpiece having a three-dimensional free-form surface such as a mold, Thus, there is an effect that a hard coating can be formed while changing the film thickness equally or as necessary.
  • the discharge surface treatment method according to the ninth aspect of the present invention has the effect of the third aspect of the invention, in addition to the process of performing scanning while using a small-sized sintered electrode, and a large-sized sintered electrode having a specific shape.
  • the small sintered electrode is scanned over the entire curved surface of the workpiece having a three-dimensional free-form surface such as a mold, and the thickness is changed over the entire area, or as necessary.
  • a hard coating can be formed.
  • the discharge surface treatment apparatus can easily form an electrode and efficiently form a hard coating with high adhesion to a workpiece, and a mold, There is an effect that an electric discharge surface treatment apparatus which can be applied to various machine parts such as tools and machine element parts can be obtained. In addition, since a hard coating can be deposited on the workpiece in an area approximately equal to the area of the electrode, there is also an effect that a masking process becomes unnecessary.
  • the discharge surface treatment apparatus has the effect of simplifying the configuration in addition to the effect of the tenth aspect.
  • the discharge surface treatment apparatus has the effect of simplifying the configuration in addition to the effect of the eleventh aspect.
  • the discharge surface treatment apparatus has the effect of simplifying the configuration in addition to the effects of the first and second aspects.
  • the discharge surface treatment apparatus has the advantages of the tenth aspect, and can perform processing while scanning using a small-sized sintered electrode. ⁇ Small sintered electrode is scanned over the entire curved surface of the workpiece having a three-dimensional free-form surface such as a die, and the film thickness is equal over the entire area, or the film thickness is changed as necessary There is an effect that a hard coating can be formed while performing the heating.
  • the discharge surface treatment apparatus of the seventeenth aspect of the present invention has the effect of the invention of the eleventh aspect, and is capable of processing while scanning using a small-sized sintered electrode.
  • the small sintered electrode is scanned over the entire curved surface of the workpiece having a three-dimensional free-form surface such as a die, and the thickness is changed over the entire area or as necessary. There is an effect that a hard coating can be formed while performing the heating.
  • the discharge surface treatment apparatus of the eighteenth invention has the effect of the first invention, and can perform processing while scanning using a small-sized sintered electrode.
  • the small sintered electrode is scanned over the entire curved surface of the workpiece having a three-dimensional free-form surface such as a mold, and the thickness is changed over the entire area, or as necessary.
  • a hard coating can be formed.
  • FIG. 1 is a configuration diagram showing a discharge surface treatment method and apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a diagram showing a state of depositing a hard coating by continuous discharge in the discharge surface treatment method and apparatus according to Embodiment 1 of the present invention.
  • FIG. 3 is a diagram showing a state of formation of a thick film and a discharge current at that time in the discharge surface treatment method and apparatus according to the first embodiment of the present invention.
  • FIG. 4 is a diagram showing a means for changing electric conditions in the discharge surface treatment method and apparatus according to Embodiment 1 of the present invention.
  • FIG. 5 is a configuration diagram showing a discharge surface treatment method and apparatus according to Embodiment 2 of the present invention.
  • FIG. 6 is a configuration diagram showing a discharge surface treatment method and apparatus according to Embodiment 3 of the present invention.
  • FIG. 7 is a configuration diagram showing a conventional discharge surface treatment method.
  • FIG. 1 is a configuration diagram showing a surface treatment method and apparatus according to a first embodiment of the present invention, in which 2 is a workpiece, 3 is a processing tank, and 4 is insulating oil or water.
  • the main working fluid, 10 is a feeder, 1 is a feed screw, 1 is a sintered electrode, 13 is a hard coating formed on the workpiece 2, and 14 is a power supply It is a control device that controls current and voltage.
  • the feed mode 10 is controlled by a control system (not shown) such that the sintered electrode 12 is servo-fed toward the workpiece 2 through the feed screw 11 and necessary control modes such as constant speed feed. It has a configuration that can be sent in one place.
  • the machining fluid 4 is mainly composed of an insulating oil or water.
  • an insulating oil used as the machining fluid 4
  • the technology of a widely used electric discharge machine can be applied as it is, There are advantages such as easy configuration.
  • hydroxide may be generated at the same time as the reaction, and a problem may occur when a high quality coating is required.
  • using the electroless power supply of the wire electric discharge machine, which is now widely used, can minimize the above-mentioned drawbacks. Even when water is used as the machining fluid, it is practically insulated from the machining fluid.
  • a hard coating having the same properties as when using oil having a property can be formed.
  • Powders of metal carbides belonging to groups IVa, Va, and Via of the Periodic Table (single or multiple) are combined with powders of Fe, Co, Ni, etc.
  • Non-ferrous metal powder for example, A1 alloy powder, etc.
  • the temperature inside the furnace is gradually increased using a vacuum furnace or the like, so that the green compact electrode is given sufficient strength to withstand machining, and is hardened to, for example, black ink so as not to harden too much.
  • a pre-sintering step iron group kinking such as Co begins to elute and fills the gaps between carbides, creating a so-called carbide solid solution.
  • carbide solid solution the mutual bonding proceeds, but the sintering temperature is relatively low and the temperature does not reach the main sintering, so that the bonding is weak.
  • the sintered electrode that has undergone such a pre-sintering step is taken out, machined and dimensioned into a required shape, and used as a sintered electrode 12.
  • the conditions of the pre-sintering step vary depending on the electrode material, but can be determined in advance by experiments.
  • the sintering temperature ranges from about 400 ° C to 110 ° C.
  • the pre-sintering temperature it is important that the pre-sintering temperature not be raised above 110 ° C. If this temperature is exceeded, the electrode will be hardened too much, and in the next electric discharge machining, the electrode material will drop unevenly due to the thermal shock caused by the arc discharge, and it will not be supplied properly between the poles. It greatly affects the quality of the applied coating.
  • the gap between the electrodes is locally heated to a high temperature by arc heat.
  • the pre-sintered sintered electrode 12 due to the thermal shock energy causes a portion of the electrode material facing the workpiece 2 to fall into a powdery form at the same time as some of the electrode material falls off between the poles. Be released.
  • the gap is instantaneously turned into a high-temperature plasma state of several thousand ° C or more, and most of the electrode material is completely melted.
  • the surface of the workpiece facing the electrode is also instantaneously heated at the position where the arc discharge occurs, and is brought into a molten state like the electrode material. Electrode material melted in this high temperature state The workpiece and the workpiece are mixed with each other, and an alloy phase of the electrode material and the base material of the workpiece is formed on the workpiece.
  • the cooling fluid is rapidly cooled due to the presence of the machining fluid at and around the poles, and in the process of cooling from a high temperature state, an interfacial reaction between the liquid phase of iron group metal and the solid phase, which is carbide, or solidification between carbides.
  • the solid solution reaction of the interphase occurs instantaneously, and the sintering is performed in a very short time. In this way, the hard coating 13 is formed on the workpiece 2.
  • the deposition of the coating proceeds over time, and a thick film can be formed.
  • Fig. 2 shows the state of deposition of the hard coating by continuous discharge. It can be clearly observed that the hard coating by each single discharge is deposited so as to be folded.
  • Fig. 3 shows the state of thick film formation and the discharge current at that time, and shows the case where WC-Co is used as the sintered electrode 12 and steel is used as the workpiece 2.
  • Fig. 3 (a) shows the case where the discharge is directly applied to the base material of the workpiece 2
  • Fig. 3 (b) shows the case where the discharge is further performed after the hard coating 13 is formed.
  • I have.
  • the discharge current value I p and the discharge current pulse width are determined according to the characteristics of the material to be processed when discharging directly to the base material of the workpiece 2 or when discharging after the hard coating 13 is formed.
  • ⁇ ⁇ and the pause time r are changed. In some cases, the electrode polarity is also changed.
  • the material and hardness are different between the base material and the formed hard coating, and it depends on the characteristics of the material to be processed when discharging directly to the base material and when discharging further after the hard coating is formed.
  • Such appropriate electrical conditions according to the characteristics of the material to be processed are determined in advance by experiments and the like, and changed by the controller 14 according to the characteristics of the material to be processed.
  • the discharge current value I p, the discharge current pulse width rp, and the pause time r can be changed by switching the switches 15 and 16 and controlling the switching by a control circuit as shown in FIG.
  • a thick film of a hard coating is formed, which indicates a case where the air condition is changed between a case where the base material is released from 0 ° contact and a case where the hard coating is further released after the formation of the hard coating.
  • the electrical conditions may be changed according to the characteristics of the material to be processed.
  • FIG. 4 there is shown a case where two switches are switched, and there may be three or more switches. Also, any means that can change the current, such as changing the current with a variable resistor, may be used.
  • FIG. 3 shows a case where the base material of the workpiece is a steel material.
  • a Ti-based material may be used for the electrode.
  • the current waveform is changed corresponding to such various combinations of the material to be processed and the electrodes.
  • FIG. 5 is a configuration diagram showing a discharge surface treatment method and apparatus according to Embodiment 2 of the present invention.
  • reference numeral 2 denotes a workpiece
  • 12 denotes a sintered electrode
  • 13 denotes a workpiece 2
  • the hard coating 14 formed on the above is a control device which has a power supply and further controls current and voltage.
  • the X-axis drive unit, Y-axis drive unit, and Z-axis drive unit (not shown) move the sintered electrode 12 and the work 2 in the X, Y, and Z directions while moving the work 2 A hard film 13 is formed on the surface of.
  • the surface of the workpiece 2 is not a flat surface but a three-dimensional complex free-form surface, but the X-axis driving device, the Y-axis driving device, and the Z-axis driving device.
  • the sintered electrode 12 may be scanned along the free-form surface of the mold while keeping the gap constant or the servo voltage constant.
  • the electrode wears out very quickly, Correction feed for wear is required, and it is necessary to accurately and quickly perform Z-direction motion control of the spindle that supports the electrodes.
  • the electrode is scanned over all the curved surfaces constituting the mold, and the hard film can be deposited equally over the entire surface or while changing the film thickness as necessary.
  • electric discharge is performed in accordance with the characteristics of the material to be processed, when discharging directly to the base material of the workpiece, when further discharging after the hard coating is formed, or during the formation of the thick hard coating.
  • FIG. 6 is a configuration diagram showing a discharge surface treatment method and apparatus according to Embodiment 3 of the present invention, and shows air discharge.
  • 2 is a workpiece
  • 10 is a feed motor
  • 11 is a feed screw
  • 12 is a sintered electrode
  • 13 is a hard coating formed on the workpiece 2
  • 14 is a hard coating.
  • 17 is a gas source
  • 18 passages, and 19 is a supply pipe.
  • the gas source 17 is connected via a pipe to a passage 18 provided inside the sintered electrode 12. While the controller 14 is energized by the power supply, a required amount of air or an inert gas such as nitrogen gas is supplied from the gas source 17.
  • the supply pipe 19 is an example in which a gas is supplied from the outside of the electrode when no passage is provided inside the electrode, and the gas is ejected toward the gap between the electrodes.
  • the purpose of the gas supply is to cool the gap between the electrodes and carry out the surplus electrode material to the outside of the system. Without this gas supply, it is difficult to stably form a hard film on the workpiece.
  • the type of gas to be used air or nitrogen gas is appropriate in consideration of environmental aspects.
  • the discharge surface treatment method and apparatus according to the present invention are suitable for use in forming a hard coating on the surface of a workpiece.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un procédé et un dispositif de traitement de surface par décharges. Selon ce procédé, on obtient une électrode frittée (12), premièrement, en mélangeant une poudre d'un métal appartenant au groupe de fer ou une poudre d'un métal non ferreux possédant le même composant qu'une pièce à usiner (2), séparément ou en combinaison, pour faire une poudre obtenue par la combinaison de carbures de métaux appartenant aux groupes IV a, V a et VI a de la table périodique, séparément ou en combinaison; deuxièmement, en moulant le mélange par compression et; troisièmement, en préfrittant le mélange moulé. L'électrode est utilisée comme une électrode d'usinage par décharges. Un dispositif de commutation sert à commuter, en fonction des caractéristiques du matériau à traiter, entre un premier état électrique dans lequel le matériau de base de la pièce (2) est directement traité en surface par décharges et un deuxième état électrique dans lequel un revêtement dur formé (13) est traité en surface par décharges, l'application des décharges étant effectuée en continu entre l'électrode frittée (12) et la pièce (2) de manière à fixer les revêtements durs (13) déposés à la surface de la pièce (2) au moyen de l'énergie des décharges et à former ainsi un film épais.
PCT/JP1999/000822 1998-11-13 1999-02-24 Procede et dispositif de traitement de surface par decharge Ceased WO2000050194A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CH01573/01A CH694246A5 (de) 1999-02-24 1999-02-24 Vefahren und Vorrichtung zur Funkenerosionsbearbeitung.
CN99814043A CN1126628C (zh) 1999-02-24 1999-02-24 放电表面处理方法以及装置
PCT/JP1999/000822 WO2000050194A1 (fr) 1999-02-24 1999-02-24 Procede et dispositif de traitement de surface par decharge
JP2000600798A JP5547864B2 (ja) 1999-02-24 1999-02-24 放電表面処理方法及び装置
DE19983777T DE19983777T1 (de) 1999-02-24 1999-02-24 Verfahren und Gerät für die Entladungsoberflächenbehandlung
TW088104284A TW475005B (en) 1999-02-24 1999-03-19 Surface treating method and device by electric discharge
US09/872,421 US6929829B2 (en) 1998-11-13 2001-05-31 Method and device discharging surface treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/000822 WO2000050194A1 (fr) 1999-02-24 1999-02-24 Procede et dispositif de traitement de surface par decharge

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/005110 Continuation WO2000029155A1 (fr) 1998-11-13 1998-11-13 Procede de traitement par decharges de la surface d'une matrice, procede de fabrication d'une electrode destinee au traitement par decharges de la surface d'une matrice et electrode fabriquee a cet effet

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/872,421 Continuation US6929829B2 (en) 1998-11-13 2001-05-31 Method and device discharging surface treatment

Publications (1)

Publication Number Publication Date
WO2000050194A1 true WO2000050194A1 (fr) 2000-08-31

Family

ID=14235002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/000822 Ceased WO2000050194A1 (fr) 1998-11-13 1999-02-24 Procede et dispositif de traitement de surface par decharge

Country Status (6)

Country Link
JP (1) JP5547864B2 (fr)
CN (1) CN1126628C (fr)
CH (1) CH694246A5 (fr)
DE (1) DE19983777T1 (fr)
TW (1) TW475005B (fr)
WO (1) WO2000050194A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7537808B2 (en) 2002-07-30 2009-05-26 Mitsubishi Denki Kabushiki Kaisha Electrode for electric discharge surface treatment, electric discharge surface treatment method and electric discharge surface treatment apparatus
KR101874519B1 (ko) 2016-04-26 2018-07-04 연세대학교 산학협력단 전해방전가공장치 및 이를 이용한 전해방전가공방법

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0411351A (pt) * 2003-06-11 2006-07-11 Mitsubishi Electric Corp processo de tratamento de superfìcie de descarga elétrica
WO2010095590A1 (fr) * 2009-02-18 2010-08-26 株式会社Ihi Procédé de fabrication d'électrodes et traitement de surface par décharge électrique utilisé dans celui-ci
CN106086879A (zh) * 2013-12-16 2016-11-09 湖北工业大学 旋转体表面电火花熔敷改性工艺及装置
TWI696544B (zh) * 2016-03-22 2020-06-21 國立中興大學 積層製造加工機
CN106312205B (zh) * 2016-10-08 2018-01-16 大连理工大学 大气压冷等离子体射流中电火花加工方法
CN115233215B (zh) * 2022-07-25 2024-02-13 江苏大学 用于大深径比弯孔的瞬态加热熔覆装置及方法
CN118976951B (zh) * 2024-08-09 2025-09-26 广东工业大学 一种用于放电加工的新型合金工具电极及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542708A (en) * 1978-09-13 1980-03-26 Tdk Corp Electrode for electrolytic lapping
JPH05261624A (ja) * 1992-03-19 1993-10-12 Toshiba Tungaloy Co Ltd 放電加工装置
JPH06246542A (ja) * 1993-03-01 1994-09-06 Nitto Denko Corp 有機材料の加工方法
JPH08300227A (ja) * 1995-04-14 1996-11-19 Res Dev Corp Of Japan 放電加工用電極および放電による金属表面処理方法
JPH10512A (ja) * 1996-06-12 1998-01-06 Res Dev Corp Of Japan 放電加工による表面処理方法及びその装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2883581B2 (ja) * 1996-06-17 1999-04-19 東亜機工株式会社 サニタリー製品製造設備

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542708A (en) * 1978-09-13 1980-03-26 Tdk Corp Electrode for electrolytic lapping
JPH05261624A (ja) * 1992-03-19 1993-10-12 Toshiba Tungaloy Co Ltd 放電加工装置
JPH06246542A (ja) * 1993-03-01 1994-09-06 Nitto Denko Corp 有機材料の加工方法
JPH08300227A (ja) * 1995-04-14 1996-11-19 Res Dev Corp Of Japan 放電加工用電極および放電による金属表面処理方法
JPH10512A (ja) * 1996-06-12 1998-01-06 Res Dev Corp Of Japan 放電加工による表面処理方法及びその装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7537808B2 (en) 2002-07-30 2009-05-26 Mitsubishi Denki Kabushiki Kaisha Electrode for electric discharge surface treatment, electric discharge surface treatment method and electric discharge surface treatment apparatus
US8377339B2 (en) 2002-07-30 2013-02-19 Mitsubishi Denki Kabushiki Kaisha Electrode for electric discharge surface treatment, method of electric discharge surface treatment, and apparatus for electric discharge surface treatment
KR101874519B1 (ko) 2016-04-26 2018-07-04 연세대학교 산학협력단 전해방전가공장치 및 이를 이용한 전해방전가공방법

Also Published As

Publication number Publication date
CN1329531A (zh) 2002-01-02
DE19983777T1 (de) 2002-01-31
JP5547864B2 (ja) 2014-07-16
CN1126628C (zh) 2003-11-05
CH694246A5 (de) 2004-10-15
TW475005B (en) 2002-02-01

Similar Documents

Publication Publication Date Title
JP3227454B2 (ja) 放電表面処理用電極及びその製造方法並びに放電表面処理方法及び装置
US6929829B2 (en) Method and device discharging surface treatment
CN102119241B (zh) 放电表面处理方法
JPWO1999058744A1 (ja) 放電表面処理用電極及びその製造方法並びに放電表面処理方法及び装置
CN107974682B (zh) 一种压铸模具表面强化和修复再制造的方法
WO2000050194A1 (fr) Procede et dispositif de traitement de surface par decharge
JPH0919829A (ja) 放電加工による表面処理方法および装置
JPWO2000050194A1 (ja) 放電表面処理方法及び装置
WO2001023640A1 (fr) Electrode de traitement de surface par decharge electrique, son procede de production et procede de traitement de surface par decharge electrique
JP2001138141A (ja) 液中放電を利用した表面被覆処理法とその消耗電極
JP4523547B2 (ja) 放電表面処理方法および放電表面処理装置
JP3931656B2 (ja) 放電表面処理用電源装置及び放電表面処理方法
US5870663A (en) Manufacture and use of ZrB2 /CU composite electrodes
JPWO2001051240A1 (ja) 放電表面処理用電源装置及び放電表面処理方法
EP2100710A1 (fr) Moule thermo-isolant, composant de moule, machine à mouler, et procédé de fabrication du moule thermo-isolant
CN116352233B (zh) 一种弹射式陶瓷颗粒增强复合材料熔融堆积增材制造方法
TW469203B (en) Method for treating a surface with electric discharge and apparatus therefor
WO2000067941A1 (fr) Procede et appareil de traitement de surface par electro-erosion, et electrode de decharge
WO2001055481A1 (fr) Alimentation electrique pour traitement de surface par decharge et procede de traitement de surface par decharge
JPH0949005A (ja) 傾斜機能材料の製造方法
WO2008010263A1 (fr) Procédé de production d'une électrode pour le traitement de surface par décharge et procédé de traitement de surface par décharge
JP4320523B2 (ja) 放電表面処理用電極及びその製造方法並びに放電表面処理方法
JP4274337B2 (ja) 放電現象を利用した金属材料の表面高硬化方法
JP2006213004A (ja) 射出成形機用部材並びに被膜形成方法
JPH01178379A (ja) マイクロ溶接方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 99814043.0

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): CH CN DE JP US

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
RET De translation (de og part 6b)

Ref document number: 19983777

Country of ref document: DE

Date of ref document: 20020131

WWE Wipo information: entry into national phase

Ref document number: 19983777

Country of ref document: DE

REG Reference to national code

Ref country code: DE

Ref legal event code: 8607