JPS61121831A - Electric wire discharge machining unit - Google Patents
Electric wire discharge machining unitInfo
- Publication number
- JPS61121831A JPS61121831A JP24078384A JP24078384A JPS61121831A JP S61121831 A JPS61121831 A JP S61121831A JP 24078384 A JP24078384 A JP 24078384A JP 24078384 A JP24078384 A JP 24078384A JP S61121831 A JPS61121831 A JP S61121831A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- wire electrode
- torque
- bobbin
- tension
- 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.)
- Pending
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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
- B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
- B65H59/043—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support with a braking force varying proportionally to the diameter or the weight of the package being unwound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/35—Ropes, lines
- B65H2701/354—Cutting lines, e.g. for grass cutting
Landscapes
- 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
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はワイヤ電極を被加工物に対して微少間隔隔て
て対向させ、該被加工物とワイヤ電極との間にパルス性
の放電を発生させて、放電エネルギーにより被加工物を
切断加工するワイヤ放電加工装置に関し、特に切断加工
中の上記ワイヤ電極の張力を一定ならしめるようにした
ものである。[Detailed Description of the Invention] [Industrial Application Field] This invention places a wire electrode facing a workpiece at a minute interval, and generates a pulsed electric discharge between the workpiece and the wire electrode. The present invention relates to a wire electrical discharge machining apparatus that cuts a workpiece using electrical discharge energy, and is particularly designed to keep the tension of the wire electrode constant during cutting.
一般にワイヤ放電加工装置は、硬い金属等の複雑な切断
加工を高精度でかつ容易になし得るものとして知られて
いる。Wire electric discharge machining devices are generally known as being capable of easily performing complex cutting operations on hard metals and the like with high precision.
このワイヤ放電加工装置では、ワイヤ電極のたるみを防
止し、常にワイヤ放電加工に必要な所定の張力を該ワイ
ヤ電極に与えるテンション機構が設けられている。This wire electrical discharge machining apparatus is provided with a tension mechanism that prevents the wire electrode from sagging and always applies a predetermined tension to the wire electrode necessary for wire electrical discharge machining.
第５図は従来のワイヤ放電加工装置の上記したテンシ・
ヨン機構の構成図である。図において、符号１はワイヤ
ボビン、２はプーリ、３はブレーキローラ、４はプーリ
、５はブレーキ押さえ、６゜７はプーリ、８はワイヤ巻
ローラ、９はピンチｐ−ラ、１０はワイヤ回収箱、１１
はワイヤ電極、１２はトルクモータであり、ワイヤボビ
ン１に巻回されたワイヤ電極１１は上記プーリ２、ブレ
ーキローラ３とプーリ４、ブレーキ押さえ５、プーリ６
．７及びワイヤ巻ローラ８とピンチソーラ９を経てワイ
ヤ回収箱１０に至る。Figure 5 shows the above-mentioned tension and
FIG. 3 is a configuration diagram of a Yon mechanism. In the figure, 1 is a wire bobbin, 2 is a pulley, 3 is a brake roller, 4 is a pulley, 5 is a brake presser, 6°7 is a pulley, 8 is a wire winding roller, 9 is a pinch roller, and 10 is a wire collection box. , 11
is a wire electrode, 12 is a torque motor, and the wire electrode 11 wound around the wire bobbin 1 is connected to the pulley 2, brake roller 3 and pulley 4, brake presser 5, and pulley 6.
．． 7, a wire winding roller 8, and a pinch solar 9 before reaching a wire collection box 10.
上記ワイヤボビン１に巻回されたワイヤ電極１１は、定
速回転している上記のワイヤ巻ローラ８とピンチローラ
９に挟まれ、定速で上記のワイヤボビン１から繰り出さ
れる。このワイヤ電極１１は上記ブレーキローラ６によ
り所定の張力が付与される。また、ワイヤ電極１１がワ
イヤボビン１から外れないように上記のトルクモータ１
２により、ワイヤボビン１が上記ワイヤ電極１１を繰り
出す方向とは反対の方向に一定のトルクを付与するよう
に付勢されている。従って、上記のワイヤ電極１１はワ
イヤ巻は一う８とピンチローラ９により挟まれて送りだ
され、この送り出されるワイヤ電極１１は上記のブレー
キローラ３とトルクモータ１２により制動され、これに
よりワイヤ電極１１には所定の張力が発生する。The wire electrode 11 wound around the wire bobbin 1 is sandwiched between the wire winding roller 8 and the pinch roller 9, which are rotating at a constant speed, and is unwound from the wire bobbin 1 at a constant speed. A predetermined tension is applied to this wire electrode 11 by the brake roller 6 . Also, in order to prevent the wire electrode 11 from coming off the wire bobbin 1, the torque motor 1 is
2, the wire bobbin 1 is biased to apply a constant torque in a direction opposite to the direction in which the wire electrode 11 is fed out. Therefore, the wire electrode 11 is fed out while being sandwiched between the wire winding 8 and the pinch roller 9, and the wire electrode 11 being sent out is braked by the brake roller 3 and the torque motor 12, thereby causing the wire electrode to A predetermined tension is generated in 11.
切断加工によりワイヤ電極１１が消耗して減少し、ワイ
ヤボビン１に巻かれたワイヤ電極１１の巻径が小さくな
ると、上記のトルクモータ１２により与えられるトルク
は一定であるため、該トルクモータのトルクに起因する
ワイヤ電極１１の張力が増加し、このため該ワイヤ電極
の総合的な張力が増加する。When the wire electrode 11 is consumed and reduced by the cutting process, and the winding diameter of the wire electrode 11 wound around the wire bobbin 1 becomes smaller, the torque applied by the torque motor 12 is constant, so the torque of the torque motor increases. The resulting tension in the wire electrode 11 increases, thus increasing the overall tension in the wire electrode.
上記のような従来のワイヤ放電加工装置では、切断加工
によりワイヤ電極が消耗して減少すると、該ワイヤ電極
の総合的な張力が増加し、加工精度が悪くなるという問
題点があった。In the conventional wire electric discharge machining apparatus as described above, there is a problem in that when the wire electrode is consumed and reduced by the cutting process, the overall tension of the wire electrode increases and the machining accuracy deteriorates.
この発明はかかる問題点を解決するためになされたもの
で、ワイヤボビンに巻かれたワイヤ電極の巻径が小さく
なったときに、該ワイヤボビンをそのワイヤ電極供給方
向とは反対方向に付勢するトルクモータのトルクを減少
させ、これにより該ワイヤ電極の総合的な張力を一定な
らしめ、以てワイヤ放電加工精度の向上が可能となるよ
うにしたワイヤ放電加工装置を提供することを目的とす
る。This invention was made to solve this problem, and when the winding diameter of the wire electrode wound on the wire bobbin becomes small, a torque is applied that urges the wire bobbin in a direction opposite to the direction in which the wire electrode is supplied. It is an object of the present invention to provide a wire electrical discharge machining device in which the torque of a motor is reduced, thereby making the overall tension of the wire electrode constant, thereby making it possible to improve the accuracy of wire electrical discharge machining.
この発明に係るワイヤ放電加工装置は、切断加工中に、
ワイヤボビンに巻回されたワイヤ電極をピンチローラ等
により所°定の速度で引き出し、トルクモータによりワ
イヤボビンをワイヤ電極の供給方向に付勢してワイヤ電
極に張力を付与し、光センサによりワイヤボビンに巻回
された上記ワイヤ電極の巻径の減少量をワイヤボビンと
非接触で検出し、この光センサによって検出された信号
に応じて上記トルクモータのトルクを減少させるように
したものである。The wire electrical discharge machining apparatus according to the present invention provides, during cutting,
The wire electrode wound around the wire bobbin is pulled out at a predetermined speed using a pinch roller, etc., the wire bobbin is urged in the direction in which the wire electrode is supplied by a torque motor to apply tension to the wire electrode, and the wire electrode is wound around the wire bobbin using an optical sensor. The amount of decrease in the winding diameter of the rotated wire electrode is detected without contact with the wire bobbin, and the torque of the torque motor is decreased in accordance with the signal detected by the optical sensor.
この発明においては、ワイヤボビンに巻回されたワイヤ
電極がピンチソーラ等により所定の速度で引き出され、
トルクモータによりワイヤボビンがワイヤ電極の供給方
向とは逆方向に付勢されるのでワイヤ電極に張力が付与
され、光センサによりワイヤボビンに巻回された上記ワ
イヤ電極の巻径の減少量がワイヤボビンと非接触で検出
され、この光センナによって検出された信号に応じて上
記トルクモータのトルクが減少され、これにより上記ワ
イヤ電極の張力が一定になる。In this invention, a wire electrode wound around a wire bobbin is pulled out at a predetermined speed using a pinch solar or the like.
The torque motor urges the wire bobbin in the opposite direction to the direction in which the wire electrode is supplied, so tension is applied to the wire electrode, and an optical sensor detects the amount of decrease in the winding diameter of the wire electrode wound around the wire bobbin. The torque of the torque motor is reduced in response to the signal detected by the contact and detected by the optical sensor, thereby keeping the tension in the wire electrode constant.
第１図はこの発明の一実施例を示すプマツク線図である
。図において、符号１はワイヤ電極が巻回されたワイヤ
ボビン、１２はトルクモータであり、これらは前記の第
５図で説明した従来のワイヤ放電加工装置における同一
符号のものと同一または相当部分を示すものである。１
６はワイヤボビン１に巻回されたワイヤ電極の巻径の減
少量をワイヤボビン１と非接触で検出する光フアイバ利
用変位センサ、１４はワイヤ放電加工を制御する制御装
置である。第２図は上記光ファイバ利用変位センサ１３
用ファイバ束の配列（ランダム形）を示すものであり、
白丸が受光ファイバ、黒丸が入射光ファイバを示す。上
記の光フアイバ利用変位センサ１３からの出力により第
３図に示すように、上記トルクモータ１２のトルクが制
御される。FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, the reference numeral 1 indicates a wire bobbin around which a wire electrode is wound, and the reference numeral 12 indicates a torque motor, which are the same or corresponding parts to those with the same reference numerals in the conventional wire electric discharge machining apparatus explained in FIG. 5 above. It is something. 1
6 is an optical fiber-based displacement sensor that detects the amount of decrease in the winding diameter of the wire electrode wound around the wire bobbin 1 without contacting the wire bobbin 1, and 14 is a control device that controls the wire electric discharge machining. Figure 2 shows the optical fiber-based displacement sensor 13.
This shows the arrangement (random type) of fiber bundles for
The white circle indicates the receiving fiber, and the black circle indicates the input optical fiber. The output from the fiber optic displacement sensor 13 controls the torque of the torque motor 12 as shown in FIG.
第３図において、符号１２は上記したトルクモータ、１
４は制御装置である。１５は光電変換器であり、前記し
た光フアイバ利用変位センサ１３から端子１６を経て入
力された光強度出力信号が電気信号（電圧）に変換され
る。１７はテーブルであり、前記ワイヤ電極の張力を一
定にしたときの光電変換器１５の出力電圧とトルクモー
タ１２の入力電圧との関係を予め測定して作成したもの
である。In FIG. 3, reference numeral 12 denotes the above-described torque motor, 1
4 is a control device. Reference numeral 15 denotes a photoelectric converter, which converts the light intensity output signal inputted from the optical fiber displacement sensor 13 through the terminal 16 into an electric signal (voltage). Reference numeral 17 is a table, which is created by previously measuring the relationship between the output voltage of the photoelectric converter 15 and the input voltage of the torque motor 12 when the tension of the wire electrode is kept constant.
上記のように構成されたワイヤ放電加工装置では、切断
加工を開始すると、ワイヤボビン１からは、図示してい
ない前記第５図で説明した従来のテンション機構と同様
のテンション機構によりワイヤ電極が繰り出される。こ
のワイヤ電極が繰り出されているときに、該ワイヤ電極
がワイヤボビン１から外れないように、該ワイヤボビン
は上記のトルクモータ１２によりワイヤ電極の繰り出し
方向とは反対方向に所定のトルクが付与されている。こ
の状態で切断加工を継続すると、ワイヤ電極のワイヤボ
ビン１における巻径が徐々に減少し、トルクモータ１２
により一定のトルクがワイヤボビン１に与えられている
ため、ワイヤ電極の張力が徐々に増加する。ワイヤ電極
のワイヤボビン１における巻径が徐々に減少するときの
変位は光フアイバ利用変位センサ１６により検出され、
検出結果は上記制御装置１４へ供給される。In the wire electrical discharge machining apparatus configured as described above, when cutting is started, a wire electrode is paid out from the wire bobbin 1 by a tension mechanism (not shown) similar to the conventional tension mechanism explained in FIG. 5 above. . To prevent the wire electrode from coming off the wire bobbin 1 while the wire electrode is being fed out, a predetermined torque is applied to the wire bobbin by the torque motor 12 in the opposite direction to the feeding direction of the wire electrode. . If the cutting process is continued in this state, the winding diameter of the wire electrode on the wire bobbin 1 will gradually decrease, and the torque motor 12
Since a constant torque is applied to the wire bobbin 1, the tension of the wire electrode gradually increases. The displacement when the winding diameter of the wire electrode on the wire bobbin 1 gradually decreases is detected by the optical fiber displacement sensor 16,
The detection results are supplied to the control device 14 described above.
第４図は光フアイバ利用変位センサ１３の受光特性を示
すものである。変位Ａ、Ｂの範囲では光フアイバ利用変
位センサ１３の受光強度出力はワイヤ電極の巻径の減少
に伴い増大する。この受光強度出力は制御袋２１４へ入
力され、第３図に示す光電変換器１５により上記の受光
強度出力が電気量（電圧）に変換される。次にテーブル
１７を参照して（このテーブルには張力を一定にした場
合の光電変換器１５の出力電圧とトルクモータ１２の入
力電圧との関係が示されている）光電変換器１５の出力
電圧に対応するワイヤ電極の張力を一定にするためのト
ルクモータ１２への入力電圧を捜しだす。そして、この
トルクモータ１２の入力電圧を制御装置１４からトルク
モータ１２に出力（この場合は電圧を下げる）して該ト
ルクモータのトルクを下げ、ワイヤ電極の張力を一定に
保つ。FIG. 4 shows the light receiving characteristics of the optical fiber displacement sensor 13. In the range of displacements A and B, the received light intensity output of the optical fiber displacement sensor 13 increases as the winding diameter of the wire electrode decreases. This received light intensity output is input to the control bag 214, and the above-mentioned received light intensity output is converted into an amount of electricity (voltage) by the photoelectric converter 15 shown in FIG. Next, referring to Table 17 (this table shows the relationship between the output voltage of the photoelectric converter 15 and the input voltage of the torque motor 12 when the tension is constant), the output voltage of the photoelectric converter 15 is Find the input voltage to the torque motor 12 to keep the tension of the wire electrode constant corresponding to . Then, the input voltage of the torque motor 12 is output from the control device 14 to the torque motor 12 (in this case, the voltage is lowered) to lower the torque of the torque motor and keep the tension of the wire electrode constant.
この発明は以上説明したとおり、ワイヤ電極１１を被加
工物に対して微少間隔隔てて対向させ、該被加工物とワ
イヤ電極１１との間にパルス性の放電エネルギーにより
被加工物を切断加工するワイヤ放電加工装置において、
切断加工中に、ワイヤボビン１に巻回された上記ワイヤ
電極１１を所定の速度で引き出すワイヤ巻ローラ８とピ
ンチローラ９等よりなる手段と、ワイヤボビン１をワイ
ヤ電極１１の供給方向とは逆方向に付勢してワイヤ電極
１１に張力を付与するトルクモータ１２と、ワイヤボビ
ン１に巻回された上記ワイヤｉ［１１の巻径の減少量を
ワイヤボビン１と非接触で検出する光フアイバ利用変位
センサ１６等の光センナとを備え、この光センサによっ
て検出された信号に応じて上記トルクモータ１２のトル
クを減少させ、上記ワイヤ電極１１の張力を一定ならし
めるようにし、だから、ワイヤ電極１１の減少に伴うワ
イヤ電極１１の張力の変化を防止することができ、高精
度の放電加工が可能となる等の効果がある。As explained above, in this invention, the wire electrode 11 is opposed to the workpiece at a minute interval, and the workpiece is cut by pulsed discharge energy between the workpiece and the wire electrode 11. In wire electrical discharge machining equipment,
During the cutting process, the wire electrode 11 wound around the wire bobbin 1 is pulled out at a predetermined speed by means including a wire winding roller 8, a pinch roller 9, etc., and the wire bobbin 1 is moved in a direction opposite to the feeding direction of the wire electrode 11. A torque motor 12 that energizes and applies tension to the wire electrode 11; and an optical fiber-based displacement sensor 16 that detects the amount of decrease in the winding diameter of the wire i[11 wound around the wire bobbin 1 without contacting the wire bobbin 1. The torque of the torque motor 12 is reduced in accordance with the signal detected by the optical sensor, and the tension of the wire electrode 11 is kept constant. It is possible to prevent the accompanying change in the tension of the wire electrode 11, and there are effects such as enabling highly accurate electrical discharge machining.
第１図乃至第４図はこの発明の一実施例を示すものであ
り、第１図はテンション機構の要部の構成図、第２図は
光フアイバ利用変位センサ用ファイバ束のｉｌ１図、第
６図はテンションを一定にする方法を説明するブロック
図、第４図は光７アイパ利用変位センサの受光特性図、
第５図は従来のワイヤ放電加工装置におけるテンション
機構を示す構成図である。
１：ワイヤボビン、１１：ワイヤ電極、１２：トルクモ
ータ、１６：光フアイバ利用変位センサなお、図中同一
符号は同−又は相当部を示す。1 to 4 show an embodiment of the present invention. FIG. 1 is a configuration diagram of the main parts of the tension mechanism, FIG. 2 is an il1 diagram of a fiber bundle for a displacement sensor using optical fibers, Figure 6 is a block diagram explaining the method of keeping the tension constant, Figure 4 is a light reception characteristic diagram of the displacement sensor using Optical 7 Eyepa,
FIG. 5 is a configuration diagram showing a tension mechanism in a conventional wire electric discharge machining device. 1: Wire bobbin, 11: Wire electrode, 12: Torque motor, 16: Displacement sensor using optical fiber Note that the same reference numerals in the drawings indicate the same or equivalent parts.
Claims (1)
、該被加工物とワイヤ電極との間にパルス性の放電を発
生させて、放電エネルギーにより被加工物を切断加工す
るワイヤ放電加工装置において、切断加工中に、ワイヤ
ボビンに巻回された上記ワイヤ電極を所定の速度で引き
出す手段と、ワイヤボビンをワイヤ電極の供給方向とは
逆方向に付勢してワイヤ電極に張力を付与するトルクモ
ータと、ワイヤボビンに巻回された上記ワイヤ電極の巻
径の減少量をワイヤボビンと非接触で検出する光センサ
とを備え、この光センサによつて検出された信号に応じ
て上記トルクモータのトルクを減少させ、上記ワイヤ電
極の張力を一定ならしめるようにしたことを特徴とする
ワイヤ放電加工装置。A wire electrical discharge machining device that places a wire electrode facing a workpiece at a minute interval, generates a pulsed electric discharge between the workpiece and the wire electrode, and cuts the workpiece using discharge energy. means for drawing out the wire electrode wound around the wire bobbin at a predetermined speed during the cutting process; and a torque motor for applying tension to the wire electrode by urging the wire bobbin in a direction opposite to the feeding direction of the wire electrode. and an optical sensor that detects a decrease in the winding diameter of the wire electrode wound around the wire bobbin without contacting the wire bobbin, and adjusts the torque of the torque motor according to the signal detected by the optical sensor. A wire electrical discharge machining apparatus characterized in that the tension of the wire electrode is kept constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24078384A JPS61121831A (en) | 1984-11-16 | 1984-11-16 | Electric wire discharge machining unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24078384A JPS61121831A (en) | 1984-11-16 | 1984-11-16 | Electric wire discharge machining unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61121831A true JPS61121831A (en) | 1986-06-09 |
Family
ID=17064630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24078384A Pending JPS61121831A (en) | 1984-11-16 | 1984-11-16 | Electric wire discharge machining unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121831A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121131A (en) * | 1987-11-05 | 1989-05-12 | Mitsubishi Electric Corp | Pretension device for wire electric discharge machine |
| JPH01106128U (en) * | 1988-01-06 | 1989-07-17 | ||
| JP2006288771A (en) * | 2005-04-11 | 2006-10-26 | Fukoku Co Ltd | Flexible container, medicine-contained flexible container and medicine dosing method |
| JP2007307414A (en) * | 2002-02-14 | 2007-11-29 | Otsuka Pharmaceut Factory Inc | Discharge method of medical agent |
| CN104588800A (en) * | 2014-12-12 | 2015-05-06 | 自贡市嘉特数控机械制造有限公司 | Self-adaption tension control device and method of electrode wires of linear cutting machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56126534A (en) * | 1980-03-07 | 1981-10-03 | Mitsubishi Electric Corp | Wire cut spark machining device |
-
1984
- 1984-11-16 JP JP24078384A patent/JPS61121831A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56126534A (en) * | 1980-03-07 | 1981-10-03 | Mitsubishi Electric Corp | Wire cut spark machining device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121131A (en) * | 1987-11-05 | 1989-05-12 | Mitsubishi Electric Corp | Pretension device for wire electric discharge machine |
| JPH01106128U (en) * | 1988-01-06 | 1989-07-17 | ||
| JP2007307414A (en) * | 2002-02-14 | 2007-11-29 | Otsuka Pharmaceut Factory Inc | Discharge method of medical agent |
| JP2006288771A (en) * | 2005-04-11 | 2006-10-26 | Fukoku Co Ltd | Flexible container, medicine-contained flexible container and medicine dosing method |
| CN104588800A (en) * | 2014-12-12 | 2015-05-06 | 自贡市嘉特数控机械制造有限公司 | Self-adaption tension control device and method of electrode wires of linear cutting machine |
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