WO2011145217A1 - ワイヤ放電加工装置 - Google Patents
ワイヤ放電加工装置 Download PDFInfo
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- WO2011145217A1 WO2011145217A1 PCT/JP2010/058658 JP2010058658W WO2011145217A1 WO 2011145217 A1 WO2011145217 A1 WO 2011145217A1 JP 2010058658 W JP2010058658 W JP 2010058658W WO 2011145217 A1 WO2011145217 A1 WO 2011145217A1
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- 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
- B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor
Definitions
- FIG. 1 is a block diagram showing a main circuit configuration of an axial feed control system according to an embodiment of the present invention.
- FIG. 2 is a diagram showing a result of measuring a time change of a current value flowing through the shunt resistor when a certain wire electrode and a workpiece are processed by a numerical controller.
- FIG. 3 is a diagram illustrating a result of measuring a time change of a current value flowing through the shunt resistor when another wire electrode and a workpiece are processed by a numerical controller.
- FIG. 4 is a diagram illustrating an example of a method for determining an inter-electrode state using both the absolute current value and the current change value.
- FIG. 1 is a block diagram showing a main circuit configuration of an axial feed control system according to an embodiment of the present invention.
- FIG. 2 is a diagram showing a result of measuring a time change of a current value flowing through the shunt resistor when a certain wire electrode and a workpiece are processed by a numerical controller.
- the wire or the like can be used. It is possible to determine the state between the tool electrode and the workpiece, that is, the state between the electrodes.
- the current absolute value ia is Ia1 or less or Ia3 or more, in other words, the current absolute value ia is, for example, from the reference current absolute value Ia2. It indicates that the distance is more than a certain width and the current change value ic is Ic1 or more.
- the control is performed to decrease the command speed v (t) because the inter-electrode state seems to be approaching.
- the subtracter 21 in FIG. 7 calculates a second difference obtained by subtracting the current absolute value threshold value Ia2 from the current absolute value ia measured by the numerical controller 108.
- the multiplier 22 adds the value obtained by multiplying the second difference by the proportional gain Kp2
- the integrator 23 integrates the second difference and the multiplier 24 multiplies the integrated value by the integral gain Ki2.
- the unit 25 adds to calculate a second added value.
- the subtractor 26 subtracts the second addition value from the reference command speed V to determine the command speed v (t).
- Such calculation and control may be executed by hardware by actually including arithmetic units such as the subtractor 21 and the integrator 23 of FIG. 7 in the numerical control device 108, or by numerical control.
- the software may be executed by a CPU and a computer program provided in the device 108.
- the numerical controller 108 controls the shaft feed speed to be the command speed v (t) via the servo amplifier 109 and the motor 110.
- the numerical controller 108 determines the axial feed speed v (t) according to the determination result of the inter-pole state based on both the absolute current value and the current change value. Then, a drive signal is sent to the servo amplifier 109. Thereby, the motor 110 controls the relative distance between the wire electrode 101 and the workpiece 102.
- no circuit is attached between the poles, and the absolute value of the current from the constant voltage power source that is the power supply source of the high frequency power source and the change in the current are used.
- the state between the poles is discriminated and controlled as an alternative to the gap voltage servo. That is, depending on the absolute value of the current from the constant voltage power supply and the amount of change in the current, the numerical control (NC) device controls the shaft feed speed as follows.
- the gap state is “open” or “discharge (large gap)”
- the error between the reference current change value and the current current change value is calculated, and processing such as proportional integral control is performed to perform the shaft feed speed.
- the “discharge (small gap)” state the error between the reference current absolute value and the current absolute value is calculated, and processing such as proportional-integral control is performed to lower the axis feed speed.
- the axis feed is returned until a state other than the “short circuit” state is reached.
- a shunt for detecting a current between the constant voltage power supply and the high-frequency power supply that applies the high-frequency voltage between the electrodes.
- a resistor and a voltmeter for measuring the output of the resistor are provided.
- a numerical control device that analyzes the detection result is provided, and the state between the poles is determined based on the measured current value and the change value of the current, and the axis feed control method is changed according to the determined state between the poles. .
- the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage.
- the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent requirements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. When an effect is obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.
- the constituent elements over different embodiments may be appropriately combined.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
図1は、本実施の形態のワイヤ放電加工装置の軸送り制御方式にかかる回路構成を示すブロック図である。ワイヤ電極101と被加工物102との間に高周波電源111が接続されている。高周波電源111は、高周波スイッチングを行うスイッチング回路103と、そのスイッチングを制御するスイッチング制御回路104を備える。
図4において、極間状態が「オープン」状態、或いは「放電(ギャップ大)」状態と判断された場合は、図5のブロック図に示した軸送り速度制御方式が実行される。ここで、Kp1は比例ゲイン、Ki1は積分ゲイン、Vは基準指令速度、v(t)は指令速度である。
図4において、極間状態が「放電(ギャップ安定)」状態と判断された場合は、図6のブロック図に示した軸送り速度制御方式が実行される。ここで、Kp1及びKp2は比例ゲイン、Ki1及びKi2は積分ゲイン、Vは基準指令速度、v(t)は指令速度である。
図4において、極間状態が「放電(ギャップ小)」状態と判断された場合は、図7のブロック図に示した軸送り速度制御方式が実行される。ここで、Kp2は比例ゲイン、Ki2は積分ゲイン、Vは基準指令速度、v(t)は指令速度である。
図4において、極間状態が「短絡」状態と判断された場合は、極間状態が「短絡」以外の状態になるまで軸送りを戻す。
102 被加工物
103 スイッチング回路
104 スイッチング制御回路
105 電圧計
106 シャント抵抗
107 定電圧電源
108 数値制御装置
109 サーボアンプ
110 モーター
111 高周波電源
201、202、203、301、302、303 電流時間変化
11、21 減算器
12、22、14、24 乗算器
13、23 積分器
15、25 加算器
Claims (6)
- 被加工物から間隔をおいて配置されたワイヤ電極と、
前記被加工物と前記ワイヤ電極との間に高周波電圧を印加するための定電圧電源とを備え、
前記高周波電圧の印加により前記被加工物と前記ワイヤ電極との間に放電を発生させて前記被加工物を加工するワイヤ放電加工装置であって、
前記定電圧電源から流れる電流の電流値を測定する電流測定手段と、
測定された前記電流値と前記電流値の変化値とに基づいて、前記被加工物と前記ワイヤ電極との間の状態である極間状態を判別する判別手段と、
判別された前記極間状態に基づいて、前記被加工物と前記ワイヤ電極との間隔を制御する制御手段とを
さらに備えることを特徴とするワイヤ放電加工装置。 - 前記被加工物と前記ワイヤ電極との間に高周波電圧を印加するスイッチング回路部を備え、
前記電流測定手段は、前記定電圧電源と前記スイッチング回路部との間に接続された電流検出用抵抗と、前記電流検出用抵抗の電圧を測定する電圧計とを含む
ことを特徴とする請求項1に記載のワイヤ放電加工装置。 - 前記判別手段によって判別された前記極間状態が、開放状態の場合、或いは放電状態で前記間隔が所望の範囲の値より大きい場合は、
前記制御手段は、前記変化値と電流変化値閾値との差分に基づいて、前記間隔が小さくなるように制御する
ことを特徴とする請求項1または2に記載のワイヤ放電加工装置。 - 前記判別手段によって判別された前記極間状態が、放電状態で前記間隔が所望の範囲の値より小さい場合は、
前記制御手段は、前記電流値の絶対値と電流絶対値閾値との差分に基づいて、前記間隔が大きくなるように制御する
ことを特徴とする請求項1または2に記載のワイヤ放電加工装置。 - 前記判別手段によって判別された前記極間状態が、放電状態で前記間隔が所望の範囲の値である場合は、
前記制御手段は、前記変化値と電流変化値閾値との差分と前記電流値の絶対値と電流絶対値閾値との差分とに基づいて、前記間隔が所望の範囲の値に維持されるように制御する
ことを特徴とする請求項1または2に記載のワイヤ放電加工装置。 - 前記判別手段によって判別された前記極間状態が、短絡状態の場合は、
前記制御手段は、前記極間状態が短絡状態でなくなるまで、前記間隔が大きくなるように制御する
ことを特徴とする請求項1または2に記載のワイヤ放電加工装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800669364A CN102905832A (zh) | 2010-05-21 | 2010-05-21 | 线电极放电加工装置 |
JP2012515696A JPWO2011145217A1 (ja) | 2010-05-21 | 2010-05-21 | ワイヤ放電加工装置 |
DE112010005586T DE112010005586T5 (de) | 2010-05-21 | 2010-05-21 | Drahterodiervorrichtung |
PCT/JP2010/058658 WO2011145217A1 (ja) | 2010-05-21 | 2010-05-21 | ワイヤ放電加工装置 |
US13/698,807 US20130062318A1 (en) | 2010-05-21 | 2010-05-21 | Wire discharge machine |
Applications Claiming Priority (1)
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PCT/JP2010/058658 WO2011145217A1 (ja) | 2010-05-21 | 2010-05-21 | ワイヤ放電加工装置 |
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WO2011145217A1 true WO2011145217A1 (ja) | 2011-11-24 |
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PCT/JP2010/058658 WO2011145217A1 (ja) | 2010-05-21 | 2010-05-21 | ワイヤ放電加工装置 |
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US (1) | US20130062318A1 (ja) |
JP (1) | JPWO2011145217A1 (ja) |
CN (1) | CN102905832A (ja) |
DE (1) | DE112010005586T5 (ja) |
WO (1) | WO2011145217A1 (ja) |
Families Citing this family (5)
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CN107078070B (zh) * | 2015-05-03 | 2018-07-06 | 华祥股份有限公司 | 打线接合用球形成装置 |
CN107790834B (zh) | 2016-09-05 | 2019-11-08 | 通用电气公司 | 电加工的装置和方法,混合加工的系统和方法 |
CN108526630A (zh) * | 2018-06-11 | 2018-09-14 | 扬州万泰电子科技有限公司 | 一种智能型线切割无阻高频脉冲电源电路 |
JP7173921B2 (ja) * | 2019-05-10 | 2022-11-16 | ファナック株式会社 | ワイヤ放電加工機およびワイヤ放電加工方法 |
CN110640244B (zh) * | 2019-11-07 | 2020-07-07 | 中国航空制造技术研究院 | 一种精密电解加工实时进给控制系统及方法 |
Citations (2)
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JPS63150110A (ja) * | 1986-12-11 | 1988-06-22 | Fanuc Ltd | 放電加工装置 |
JPH10217032A (ja) * | 1997-01-29 | 1998-08-18 | I N R Kenkyusho:Kk | 放電加工装置 |
Family Cites Families (17)
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US2927191A (en) * | 1959-02-10 | 1960-03-01 | Elox Corp Michigan | Servo power feed |
JPS61219521A (ja) | 1985-03-25 | 1986-09-29 | Brother Ind Ltd | 放電加工機 |
JPS61260915A (ja) | 1985-05-15 | 1986-11-19 | Mitsubishi Electric Corp | 放電加工用電源 |
JPH03281123A (ja) * | 1990-03-30 | 1991-12-11 | Mitsubishi Electric Corp | ワイヤ放電加工のワイヤ電極断線予知方法およびその装置 |
JP2858515B2 (ja) * | 1992-01-07 | 1999-02-17 | 三菱電機株式会社 | 放電加工方法及びその装置 |
JPH071237A (ja) | 1993-06-18 | 1995-01-06 | Fanuc Ltd | ワイヤカット放電加工機 |
JP2914104B2 (ja) | 1993-06-30 | 1999-06-28 | 三菱電機株式会社 | 放電加工方法及びその装置、並びにこの放電加工装置に適用可能な、静電容量可変装置及びインダクタンス可変装置 |
JP3293416B2 (ja) * | 1994-08-09 | 2002-06-17 | 三菱電機株式会社 | 放電加工機の放電状態検出装置 |
JPH11226816A (ja) | 1998-02-13 | 1999-08-24 | Fuji Xerox Co Ltd | 放電加工方法および放電加工装置 |
DE19981062B4 (de) * | 1998-05-13 | 2007-06-06 | Mitsubishi Denki K.K. | Numerische Steuerung für eine elektro-erosive Bearbeitungsmaschine |
JP2003165031A (ja) * | 2001-11-29 | 2003-06-10 | Mitsubishi Electric Corp | ワイヤ放電加工装置 |
JP4255634B2 (ja) * | 2001-11-29 | 2009-04-15 | 三菱電機株式会社 | ワイヤ放電加工装置およびワイヤ放電加工方法 |
WO2004022275A1 (ja) * | 2002-08-30 | 2004-03-18 | Mitsubishi Denki Kabushiki Kaisha | ワイヤ放電加工機 |
JP4191589B2 (ja) * | 2003-12-19 | 2008-12-03 | パナソニック株式会社 | 放電加工方法及び当該放電加工方法を用いた放電加工装置 |
JP4015148B2 (ja) * | 2004-10-28 | 2007-11-28 | ファナック株式会社 | ワイヤ放電加工機の制御装置 |
US8323473B2 (en) * | 2004-11-23 | 2012-12-04 | General Electric Company | Methods and systems for monitoring and controlling electroerosion |
JP2007044813A (ja) | 2005-08-10 | 2007-02-22 | Fanuc Ltd | 放電加工装置 |
-
2010
- 2010-05-21 WO PCT/JP2010/058658 patent/WO2011145217A1/ja active Application Filing
- 2010-05-21 JP JP2012515696A patent/JPWO2011145217A1/ja active Pending
- 2010-05-21 DE DE112010005586T patent/DE112010005586T5/de not_active Withdrawn
- 2010-05-21 US US13/698,807 patent/US20130062318A1/en not_active Abandoned
- 2010-05-21 CN CN2010800669364A patent/CN102905832A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63150110A (ja) * | 1986-12-11 | 1988-06-22 | Fanuc Ltd | 放電加工装置 |
JPH10217032A (ja) * | 1997-01-29 | 1998-08-18 | I N R Kenkyusho:Kk | 放電加工装置 |
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JPWO2011145217A1 (ja) | 2013-07-22 |
CN102905832A (zh) | 2013-01-30 |
DE112010005586T5 (de) | 2013-03-28 |
US20130062318A1 (en) | 2013-03-14 |
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