WO2008026324A1 - Appareil d'usinage combiné pour usinage à jet d'eau et pour usinage par décharge électrique - Google Patents

Appareil d'usinage combiné pour usinage à jet d'eau et pour usinage par décharge électrique Download PDF

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Publication number
WO2008026324A1
WO2008026324A1 PCT/JP2007/000951 JP2007000951W WO2008026324A1 WO 2008026324 A1 WO2008026324 A1 WO 2008026324A1 JP 2007000951 W JP2007000951 W JP 2007000951W WO 2008026324 A1 WO2008026324 A1 WO 2008026324A1
Authority
WO
WIPO (PCT)
Prior art keywords
machining
wire
guide assembly
processing tank
lower arm
Prior art date
Application number
PCT/JP2007/000951
Other languages
English (en)
Japanese (ja)
Inventor
Shinichi Yoshida
Original Assignee
Sodick 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 Sodick Co., Ltd. filed Critical Sodick Co., Ltd.
Publication of WO2008026324A1 publication Critical patent/WO2008026324A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive 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
    • B23H5/00—Combined machining
    • B23H5/04—Electrical discharge machining combined with mechanical working
    • 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

Definitions

  • the present invention relates to a wire electric discharge machining apparatus for machining a conductive workpiece by electric discharge using a wire electrode supported between a pair of wire guides.
  • the present invention relates to a combined machining apparatus capable of wire electric discharge machining and water jet machining for cutting a workpiece with a jet of high-pressure water.
  • Wire electric discharge machining is known as one of machining methods capable of machining a difficult-to-cut material such as cemented carbide into a complicated shape.
  • Wire electrical discharge machining uses non-contact machining of electrical discharge energy, enabling extremely high-precision machining with shape accuracy of several u m or less and surface roughness of several U m R z or less.
  • an abrasive water jet process in which high-pressure water mixed with abrasive grains is sprayed from a jet nozzle to cut a workpiece.
  • Abrasive water jet machining can remove material at a speed nearly 10 times faster than wire electrical discharge machining.
  • machining methods that use a fluid jet as a tool, such as water jet machining cannot achieve high shape accuracy and minute surface roughness like wire electric discharge machining.
  • Patent Document 1 discloses a combined machining apparatus that can perform water jet machining and wire electric discharge machining with a single machining apparatus in order to take advantage of the high-speed machining performance of water jet machining and the high accuracy of the wire. Yes.
  • the traveling wire electrode is stretched between the upper and lower wire guides.
  • the lower wire guide is housed in the lower guide assembly.
  • the lower guide assembly also contains contacts that supply current to the wire electrodes.
  • the lower guide assembly is equipped with a nozzle that injects machining fluid into the machining area, and is attached to the tip of the lower arm.
  • the wire electrode is carried down through the lower wire guide. After being sent, it is transported horizontally by the direction change pulley. The wire electrode is further transported horizontally in the lower arm and discharged.
  • the combined machining apparatus includes a catcher tank for water jet machining and one tank that functions as a machining tank for wire discharge machining.
  • this tank is referred to as a processing tank.
  • a long hole is formed in the rear wall of the processing tank, and the lower arm is supported outside the processing tank and extends through the long hole. The long hole extends horizontally so that the lower arm can move horizontally relative to the processing tank.
  • a sealing device containing a sliding blade that closes the long hole seals the lower arm.
  • the lower arm passes through the hole of the slide plate via the O-ring.
  • a sealing material is provided between the rear wall of the processing tank and the slide plate. Therefore, water does not flow out of the processing tank even if the lower arm moves in either the X-axis direction (left-right direction) or the Y-axis direction (front-rear direction) with respect to the processing tank.
  • Patent Document 1 Japanese Patent Laid-Open No. 2 0 06 _ 1 1 0 6 9 7
  • the water stored in the processing tank contains abrasive grains.
  • Abrasives adhere to the lower wire guide direction change pulley. Fine abrasive grains clog the wire guide and prevent the wire electrode from running. In addition, the abrasive grains excessively wear the direction change pulley and prevent its rotation.
  • the high-pressure water jet may damage the power line that supplies power to the contact. Also, high pressure water jets can damage the lower arm or lower guide assembly. This limits the movement of the machining head with the jet nozzle attached in the X-axis and Y-axis directions.
  • the lower guide assembly can move between the first region and the second region.
  • the composite processing apparatus includes a terminal attached to the processing tank in the retreat area, and a power line having one end connected to the lower guide assembly and the other end connected to the terminal.
  • a lower guide assembly that houses the lower wire guide, a lower arm that is relatively movable to a processing tank that supports the lower guide assembly, and a work piece that has a long hole through which the lower arm passes.
  • One end of the power line is connected to the lower guide assembly and the other end is attached to the processing tank in the shelter area.
  • all power lines are housed in a retreat area, so high pressure water jets will not accidentally damage the power lines.
  • the sealing device is located on the side wall of the processing tank located in the above-mentioned retreat area, and is isolated from the water mixed with the abrasive grains in the processing tank, so that the abrasive grains do not adhere to the sealing device. As a result, the sealing material is not deteriorated and the relative movement of the slide plate is not hindered.
  • FIG. 1 is a perspective view partially showing the combined machining apparatus of the present invention.
  • FIG. 2 is a perspective view showing a lower arm of the combined machining apparatus of FIG.
  • FIG. 1 shows a lower portion of the combined machining apparatus of the present invention.
  • the lower arm is located in the waiting area.
  • a jet nozzle head (not shown) with a jet nozzle attached is provided.
  • a wire head (not shown) to which an upper guide assembly is attached is provided for wire electric discharge machining.
  • FIG. 2 shows the lower arm in FIG.
  • Each head moves in the X-axis direction (left-right direction) and the Y-axis direction (front-back direction) by a linear motor.
  • both heads In the X-axis direction, both heads share a guide and move on the same axis.
  • Each head moves independently in the Y-axis direction. When one head is in an operating position where the workpiece can be machined, the other head is in a retracted position that does not interfere with machining.
  • the processing tank 1 functions as a catcher tank that receives a jet of high-pressure water and a processing tank that stores a dielectric liquid.
  • the workpiece is attached to the work stand 2.
  • a buffer member for protecting the processing tank 1 from the jet of high-pressure water is provided below the work stand 2.
  • Processing tank 1 is fixed to the bed and includes four walls surrounding the workpiece.
  • a shirter 3 that can be raised and lowered is provided in the processing tank 1, a shirter 3 that can be raised and lowered is provided. Shatter 3 rises and partitions processing tank 1 into processing area 9 and evacuation area 4.
  • the lower arm 5 passes through a long hole 7 formed in the rear wall 6 of the processing tank 1.
  • the lower guide assembly 8 is fixed to the tip of the lower arm 5 and supported by the lower arm 5.
  • the lower guide assembly 8 can be moved between the machining area 9 and the retreat area 4 by a linear motor 12.
  • the lower arm 5 is moved in the Y-axis direction by the linear motor 12, and is moved in the X-axis direction by the linear motor 13.
  • the lower arm 5 moves in the XY plane in synchronization with the wire head according to the machining program during wire EDM. Therefore, during wire electrical discharge machining, the upper wire guide and lower guide assembly move in synchronization with the X-axis and Y-axis directions.
  • the lower guide assembly 8 is accommodated in the retreat area 4 during the water jet machining.
  • the tip of the lower arm 5 is accommodated in the waiting area 4, 3 is rising.
  • the shirt 3 Prior to wire electric discharge machining, the shirt 3 is lowered, and the lower arm 5 advances to the machining area 9 by the linear motor 12.
  • the lower guide assembly 8 is positioned so as to face the upper guide assembly (not shown) with respect to the workpiece.
  • the sealing device for sealing between the lower arm 5 and the processing tank 1 is a slide plate.
  • the slide plate 10 is provided so as to be slidable in the X-axis direction on the rear wall 6 of the processing tank 1 that forms a retreat area 4 through a seal material (not shown) so as to close the long hole 7.
  • a seal material not shown
  • the slide plate 10 has a hole through which the lower arm 5 passes. Between the slide plate 10 and the lower arm 5, a seal material such as an O-ring (not shown) is sealed. Therefore, when the lower arm 5 moves relative to the processing tank 1 in the Y-axis direction, it is sealed with the sealing material.
  • a seal material such as an O-ring (not shown) is sealed. Therefore, when the lower arm 5 moves relative to the processing tank 1 in the Y-axis direction, it is sealed with the sealing material.
  • the sealing device including the slide plate 10 is provided on the side of the evacuation area 4. Therefore, during water jet machining, the shirt 3 is raised and the sealing device does not come into contact with water containing abrasive grains.
  • a power line 11 for supplying a current to the contacts in the lower guide assembly 8 is provided.
  • One end of the power line 11 is connected to the lower guide assembly, and the other end is connected to a terminal attached to the rear wall 6.
  • the terminal is connected to the power supply by another power source.
  • a work (not shown) is attached to the work stand 2. Purified water is supplied to processing tank 1. The liquid level in the processing tank 1 is lower than the bottom surface of the workpiece. shirt 3 rises to form a retreat area 4 in the processing tank 1. Therefore, the lower guide assembly 8 and the direction change pulley are isolated from the processing area 9 and are immersed in the fresh water in the evacuation area 4.
  • the wire head is moved in the X-axis direction to a retracted position that does not interfere with water jet machining.
  • the jet nozzle is moved to an operating position where the workpiece can be cut.
  • the jet nozzle forms a jet of high-pressure water mixed with abrasive grains.
  • the jet nozzle head is moved in the XY plane, and the workpiece is cut into the desired shape.
  • the wire head and the lower arm 5 are in their respective retreat positions that do not interfere with the water jet machining.
  • abrasive grains are mixed into the water in the processing tank 1, but the lower arm 5 is completely isolated from the abrasive grains. Also, the rear wall 6 of the processing tank 1 is completely isolated from the abrasive grains, so that the abrasive grains do not adhere to the sealing device.
  • the shirter 3 Prior to wire electric discharge machining, the shirter 3 is lowered and the evacuation area 4 is opened.
  • Jet nozzle head force ⁇ Moves to a retracted position that does not interfere with wire electrical discharge machining.
  • the wire head is moved to an operating position where the workpiece can be machined.
  • the dielectric liquid is supplied to the processing tank 1 to such an extent that the workpiece is immersed in the dielectric liquid.
  • the lower arm 5 advances to the machining area 9 by the linear motor 1 2.
  • the upper and lower guides are vertically aligned.
  • the wire electrode is passed through the upper and lower wire guides by an automatic connection device (not shown).
  • the wire electrode is stretched vertically between the upper and lower wire guides.
  • the wire electrode is moved to the processing start point.
  • the wire head and the lower arm 5 are moved in the X-axis direction and the Y-axis direction according to the machining program, and a desired shape is formed on the workpiece.
  • dielectric liquid is directed to the workpiece from each nozzle provided in the upper and lower guide assemblies. Is injected.
  • the processing head and the lower arm can move in the X-axis direction and the Y-axis direction, but instead the processing tank can move in the X-axis direction and the Y-axis direction. You may do so.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

La présente invention concerne un appareil d'usinage combiné pouvant effectuer un usinage à jet d'eau et un usinage par décharge électrique, comprenant un obturateur (3) qui peut monter et descendre pour diviser un réservoir d'usinage (1) en une zone d'usinage (9) et une zone d'attente (4). Un fil-électrode est supporté entre des guide-fils supérieur et inférieur, le guide-fil inférieur étant stocké dans un ensemble de guide inférieur (8). L'ensemble de guide inférieur (8) est supporté au niveau de l'extrémité avant d'un bras inférieur (5) et passe de la zone de traitement (9) à la zone d'attente (4). Pendant l'usinage à jet d'eau, le bras inférieur (5) se positionne dans la zone d'attente (4). Le bras inférieur (5) se déplace dans la zone d'usinage (9) avant l'usinage par décharge électrique.
PCT/JP2007/000951 2006-09-01 2007-09-03 Appareil d'usinage combiné pour usinage à jet d'eau et pour usinage par décharge électrique WO2008026324A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-237683 2006-09-01
JP2006237683A JP2008055573A (ja) 2006-09-01 2006-09-01 複合加工装置

Publications (1)

Publication Number Publication Date
WO2008026324A1 true WO2008026324A1 (fr) 2008-03-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/000951 WO2008026324A1 (fr) 2006-09-01 2007-09-03 Appareil d'usinage combiné pour usinage à jet d'eau et pour usinage par décharge électrique

Country Status (2)

Country Link
JP (1) JP2008055573A (fr)
WO (1) WO2008026324A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62110860U (fr) * 1985-12-28 1987-07-15
JPH0349826A (ja) * 1989-07-18 1991-03-04 Shizuoka Seiki Co Ltd 電解仕上げ加工機の通電装置
JPH04304929A (ja) * 1991-01-16 1992-10-28 Sodick Co Ltd ワイヤカット放電加工機
JP2001105236A (ja) * 1999-10-12 2001-04-17 Sodick Co Ltd ワイヤカット放電加工機のシール装置及びそのシール装置のスライドプレートの製造方法
JP2002166327A (ja) * 2000-11-30 2002-06-11 Mitsubishi Electric Corp 放電加工装置
JP2004141979A (ja) * 2002-10-22 2004-05-20 Amada Co Ltd パンチ・レーザ複合機
JP2005342875A (ja) * 2004-06-07 2005-12-15 Ricoh Co Ltd 曲面加工装置並びにこれを用いて形成された光学素子及び光学素子金型、パラレルリンク機構のキャリブレーション方法
JP2006110697A (ja) * 2004-10-18 2006-04-27 Sodick Co Ltd 導電性材料でなる被加工物に任意の形状を加工する方法および複合加工装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62110860U (fr) * 1985-12-28 1987-07-15
JPH0349826A (ja) * 1989-07-18 1991-03-04 Shizuoka Seiki Co Ltd 電解仕上げ加工機の通電装置
JPH04304929A (ja) * 1991-01-16 1992-10-28 Sodick Co Ltd ワイヤカット放電加工機
JP2001105236A (ja) * 1999-10-12 2001-04-17 Sodick Co Ltd ワイヤカット放電加工機のシール装置及びそのシール装置のスライドプレートの製造方法
JP2002166327A (ja) * 2000-11-30 2002-06-11 Mitsubishi Electric Corp 放電加工装置
JP2004141979A (ja) * 2002-10-22 2004-05-20 Amada Co Ltd パンチ・レーザ複合機
JP2005342875A (ja) * 2004-06-07 2005-12-15 Ricoh Co Ltd 曲面加工装置並びにこれを用いて形成された光学素子及び光学素子金型、パラレルリンク機構のキャリブレーション方法
JP2006110697A (ja) * 2004-10-18 2006-04-27 Sodick Co Ltd 導電性材料でなる被加工物に任意の形状を加工する方法および複合加工装置

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