JPH01115516A - Electrochemical machine - Google Patents
Electrochemical machineInfo
- Publication number
- JPH01115516A JPH01115516A JP62272843A JP27284387A JPH01115516A JP H01115516 A JPH01115516 A JP H01115516A JP 62272843 A JP62272843 A JP 62272843A JP 27284387 A JP27284387 A JP 27284387A JP H01115516 A JPH01115516 A JP H01115516A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- electrode
- electrolytic solution
- electrolytic
- gap
- 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
- 239000003792 electrolyte Substances 0.000 claims abstract description 67
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000008151 electrolyte solution Substances 0.000 claims description 60
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 description 20
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009760 electrical discharge machining Methods 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、電解加工装置に係り、特に被加工物の三次
元形状の被加工面を短時間かつ高精度に仕上げて鏡面状
の光沢面を得ることができる電解加工装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an electrolytic processing device, and in particular, it can finish a three-dimensionally shaped work surface of a workpiece in a short time and with high precision to a mirror-like glossy surface. The present invention relates to an electrolytic processing apparatus that can obtain the following.
［従来の技術］
従来の金属加工装置としては、被加工物と電極との間隙
に硝酸ナトリウムや塩化ナトリウム等の電解液を満たし
、この電解液を高速で流すとともに、安定した電解作用
を阻害する電解生成物、すなわち溶出した金属化合物や
金属イオン及び水素ガス等を除去しながら、直流電流を
被加工物から電極に流して加工する。電解加工装置（特
開昭６１−７１９２１号公報及び特開昭６０−４４２２
８号公報参照）が知られている。[Conventional technology] Conventional metal processing equipment fills the gap between the workpiece and the electrode with an electrolytic solution such as sodium nitrate or sodium chloride, flows this electrolytic solution at high speed, and inhibits stable electrolytic action. Processing is performed by passing a direct current from the workpiece to the electrode while removing electrolysis products, that is, eluted metal compounds, metal ions, hydrogen gas, etc. Electrolytic processing equipment (JP-A-61-71921 and JP-A-60-4422)
(see Publication No. 8) is known.
［発明が解決しようとする問題点コ
しかしながら、この電解加工９にあっては、特に三次元
形状の底付き加工（凹窩状に形成された三次元構造のも
のに対する加工をいう）において、被加工物に電極の精
密な転写を行うことが困難で、高精度の表面品質が得ら
れないという不都合があった。そこで、本出願人はこの
不都合を除去する電解加工装置として、特願昭６２−２
７６１６号を出願したが、この電解加工装置にあっては
、被加工物と７ＴＬ極との間隙に生成した電解生成物を
排除するために、加工槽の下方に設けた電解液濾過装置
のクリーンタンクからポンプによって電解液を汲み上げ
、この電解液を前記間隙に指向する如く配設した噴射ノ
ズルから噴出して除去していた。[Problems to be Solved by the Invention] However, in this electrolytic machining 9, there is a problem in the process of bottoming a three-dimensional shape (machining of a three-dimensional structure formed in the shape of a concave hole). This method has the disadvantage that it is difficult to accurately transfer the electrode to the workpiece, and high-precision surface quality cannot be obtained. Therefore, the present applicant proposed a patent application filed in 1986-2 as an electrolytic processing device to eliminate this inconvenience.
No. 7616 was filed, but in this electrolytic processing equipment, in order to eliminate electrolytic products generated in the gap between the workpiece and the 7TL pole, an electrolytic solution filtration device installed below the processing tank is cleaned. The electrolytic solution was pumped up from the tank by a pump, and removed by being ejected from an injection nozzle arranged so as to be directed toward the gap.
したがって、このような噴射ノズルのみによる噴出では
、被加工面が複雑な形状の場合に、噴射ノズルの反対側
の被加工面まで均一に電解液を噴出させることが困難で
あり、被加工面に電解生成物が除去された部分と除去さ
れない部分とが発生し、これにより、被加工面に加工条
件の差異が生じて縞模様が発生するなど、その表面品質
を著しく損なうという不都合があった。Therefore, when the workpiece surface has a complicated shape, it is difficult to jet the electrolyte uniformly to the workpiece surface on the opposite side of the jet nozzle, and the workpiece surface may be There are areas where the electrolytic products are removed and areas where they are not, and this causes a difference in processing conditions on the processed surface, resulting in striped patterns and other disadvantages that significantly impair the surface quality.
［発明の目的］
そこでこの発明は、上記不都合を除去し、特に電極に設
けた孔から極間の電解液を吸引排除するとともに、該極
間に噴出した電解液が静止した後にパルス電流を供給す
ることにより、被加工物の三次元形状の被加工面を短時
間かつ高精度に仕上げて鏡面状の光沢面を得ることかで
きる電解加工装置を実現するにある。[Objective of the Invention] Therefore, the present invention eliminates the above-mentioned disadvantages, and in particular, sucks and removes the electrolytic solution between the electrodes from holes provided in the electrodes, and supplies a pulse current after the electrolytic solution spouted between the electrodes comes to rest. By doing so, it is possible to realize an electrolytic machining apparatus that can finish a three-dimensionally shaped work surface of a workpiece in a short time and with high precision to obtain a mirror-like glossy surface.
［問題点を解決するための手段］
この目的を達成するためにこの発明は、加工槽内で電解
液を介して対設した被加工物と電極間にパルス電流を供
給するとともに、前記被加工物と電極との間隙に生成し
た電解生成物を除去しながら被加工物を仕上げ加工する
電解加工装置において、一端が前記間隙に開口する如く
前記電極に配設した孔から前記電解生成物を含む電解液
を吸引、回収して濾過する電解液濾過装置と、該電解液
濾過装置で濾過した電解液を前記間隙に間欠的に噴出す
る電解液供給装置と、該電解液供給装置によって前記間
隙に噴出した電解液が静止した場合に前記被加工物と電
極間にパルス電流を供給する電源装置とを備えたことを
特徴とする。[Means for Solving the Problems] To achieve this object, the present invention supplies a pulse current between a workpiece and an electrode that are disposed opposite to each other via an electrolyte in a processing tank, and In an electrolytic processing apparatus that finishes processing a workpiece while removing electrolytic products generated in a gap between the object and an electrode, the electrolytic products are contained through a hole provided in the electrode such that one end opens into the gap. an electrolyte filtration device that sucks, collects and filters an electrolyte; an electrolyte supply device that intermittently spouts the electrolyte filtered by the electrolyte filtration device into the gap; The present invention is characterized by comprising a power supply device that supplies a pulse current between the workpiece and the electrodes when the spouted electrolyte comes to rest.
［作 用コ
この発明の構成によれば、電極に設けた孔から電解液濾
過装置によって極間に生成した電解生成物を含む電解液
を吸引回収して濾過するとともに、この濾過した電解液
を電解液供給装置によって間欠的に被加工物と電極との
間隙に噴出する。そして、噴出した電解液が静止した状
態で電源装置からパルス電流を供給するため、前記間隙
に生成した電解生成物を確実に除去するとともに、電解
液の流れによる影響を受けないなど、被加工面全域に亘
って加工条件を均一にし得る。[Function] According to the configuration of the present invention, the electrolytic solution containing electrolytic products generated between the electrodes is collected by suction and filtered by the electrolytic solution filtration device through the holes provided in the electrode, and the filtered electrolytic solution is also filtered. The electrolyte is intermittently sprayed into the gap between the workpiece and the electrode by the electrolyte supply device. Since pulse current is supplied from the power supply while the ejected electrolyte remains stationary, electrolytic products generated in the gap are reliably removed, and the workpiece surface is not affected by the flow of the electrolyte. Processing conditions can be made uniform over the entire area.
［実施例コ
以下、図面を参照してこの発明の実施例を詳細かつ具体
的に説明する。[Embodiments] Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.
第１〜５図は、この発明の一実施例を示す。第１〜３図
において、１はこの発明に係る電解加工装置で、この電
解加工装置１は、被加工物２を固定する被加工物固定装
置３、電極４を固定する電極固定装置５、電極駆動部６
の回転運動を往復運動に変換する駆動変換部７、パルス
電流を発生する電源装置８、モータ駆動制御部９と加工
条件制御部１０と電解液制御部１１とからなる制御装置
１２、被加工物２に関するデータ等を人力する入力装置
１３、電解液濾過装置１４、電解液供給装置１５、加工
槽１６等からなる。1 to 5 show an embodiment of the present invention. 1 to 3, reference numeral 1 denotes an electrolytic processing apparatus according to the present invention, and this electrolytic processing apparatus 1 includes a workpiece fixing device 3 for fixing a workpiece 2, an electrode fixing device 5 for fixing an electrode 4, and an electrode fixing device 5 for fixing an electrode 4. Drive part 6
A control device 12 consisting of a drive conversion section 7 that converts the rotational motion of the object into a reciprocating motion, a power supply device 8 that generates a pulse current, a motor drive control section 9, a processing condition control section 10, and an electrolyte control section 11, a workpiece 2, an electrolytic solution filtering device 14, an electrolytic solution supplying device 15, a processing tank 16, and the like.
前記被加工物固定装置３は、絶縁性の高いグラナイトも
しくはセラミックスからなるテーブルで、例えば放電加
工によって加工した被加工物２をボルト１７等により固
定する。また、前記電極固定装置５は、その下部に設け
たロッド１８の下端に、−端が被加工物２と電極４どの
間隙１９に開口し、他端が前記ロッド１８の孔６５に連
通ずる孔４６を有する、例えば純銅からなり前記放電加
工時に使用した電極４を、その電極面４ａと前記被加工
物２の被加工面２ａとが三次元方向に−様な間隙１９を
保つように固定する。そして、前記電極固定装置５は、
前記電極駆動部６と駆動変換部７とにより前記間隙１９
を所定値に維持すべく上下動する。すなわち、電極駆動
部６のロータリーエンコーダ２０とタコジェネレータ２
１からの信号により前記制御装置１２のモータ駆動制御
部９から出力される制御信号により、モータ２２を回転
制御し、このモータ２２の回転運動を駆動変換部７によ
り往復運動に変換して、前記電極固定装置５を上下動さ
せ、電極面４ａと被加工面２ａとを所定の間隙１９に制
御する。なお、前記電極４の孔４６は、被加工物２の被
加工面２ａに鏡面状の光沢面を必要としない部分の対向
箇所に設けられる。The workpiece fixing device 3 is a table made of highly insulating granite or ceramics, and fixes the workpiece 2 machined, for example, by electrical discharge machining, with bolts 17 or the like. Further, the electrode fixing device 5 has a hole at the lower end of the rod 18 provided at the lower part thereof, the negative end opens into the gap 19 between the workpiece 2 and the electrode 4, and the other end communicates with the hole 65 of the rod 18. 46, for example made of pure copper and used during the electrical discharge machining, is fixed so that the electrode surface 4a and the machined surface 2a of the workpiece 2 maintain a --like gap 19 in the three-dimensional direction. . The electrode fixing device 5 is
The gap 19 is formed by the electrode driving section 6 and the drive conversion section 7.
moves up and down to maintain it at a predetermined value. That is, the rotary encoder 20 of the electrode drive unit 6 and the tacho generator 2
The rotation of the motor 22 is controlled by a control signal output from the motor drive control section 9 of the control device 12 based on the signal from the control device 1, and the rotational motion of the motor 22 is converted into a reciprocating motion by the drive conversion section 7. The electrode fixing device 5 is moved up and down to maintain a predetermined gap 19 between the electrode surface 4a and the surface to be processed 2a. Note that the hole 46 of the electrode 4 is provided at a location opposite to a portion of the workpiece surface 2a of the workpiece 2 that does not require a mirror-like glossy surface.
前記被加工物２と電極４間に電流密度（単位面積当りの
平均電流）が７０Ａ／Ｃｍ２以下のパルスを供給する電
源装置８は、加工条件制御部１０からの制御信号により
、被加工物２の表面積に従って計算した所定の電流密度
のパルスを発生ずるもので、直流電源部２３と充放電部
２４と充放電制御部２５とを有し、例えば第４図に示す
如く構成する。The power supply device 8 supplies a pulse with a current density (average current per unit area) of 70 A/Cm2 or less between the workpiece 2 and the electrode 4, and the power supply device 8 supplies a pulse with a current density (average current per unit area) of 70 A/Cm2 or less between the workpiece 2 and the electrode 4. The device generates pulses with a predetermined current density calculated according to the surface area of , and has a DC power source section 23, a charge/discharge section 24, and a charge/discharge control section 25, and is configured as shown in FIG. 4, for example.
第４図において、直流電源部２３は、変圧器２６と整流
器２７とからなり、変圧器２６により電圧を所定値に降
下させ整流器２７により整流して直流電流を得て、後述
する蓄電器２８−１〜２８−ｎに供給する。In FIG. 4, the DC power supply unit 23 includes a transformer 26 and a rectifier 27. The voltage is lowered to a predetermined value by the transformer 26 and rectified by the rectifier 27 to obtain a DC current. ~28-n.
また、充放電部２４は、被加工物２と電極４との間隙１
９に電荷を放電する複数個の蓄電器２８−１〜２８−〇
と、これらの各蓄電器２８−１〜２８−ｎに接続し、直
流電源部２３側への電荷の逆流を阻止するダイオード２
９−１〜２９−ｎと、放電側への電荷を放電させるべく
開閉される放電スイッチ３０−１〜３０−ｎと、前記各
蓄電器２８−１〜２８−ｎを所定に充電すべく前記直流
電源部２３からの電源を給断する充電スイッチ３１とか
らなる。In addition, the charging/discharging section 24 has a gap 1 between the workpiece 2 and the electrode 4.
9, a plurality of capacitors 28-1 to 28-0, and a diode 2 connected to each of these capacitors 28-1 to 28-n to prevent backflow of charges to the DC power supply section 23 side.
9-1 to 29-n, discharge switches 30-1 to 30-n that are opened and closed to discharge charges to the discharge side, and the direct current to charge each of the capacitors 28-1 to 28-n to a predetermined value. It consists of a charging switch 31 that supplies and disconnects power from the power supply unit 23.
この充放電部２４を制御する充放電制御部２５は、蓄電
器２８−１〜２８−ｎへ供給する充電電圧値を検出する
電圧検出器３２と、前記加工条件制御部１０の充電電圧
設定部３７て設定した設定充電電圧値と前記電圧検出器
３２て検出した検出充電電圧値とを比較する電圧比較器
３３と、前記被加工物２と電極４との間隙１９に放電さ
れる電荷の電流値を検出する電流検出器３４と、前記加
工条件制御部１０の最小電流設定部４０で設定した最小
電流値と前記電流検出器３４て検出した放電電流値とを
比較する電流比較器３５と、前記加工条件制御部ＩＯの
パルス発生部３８と電流波形設定部３９と前記電流比較
器３５とからの入力により前記検出電流値が前記最小電
流値以上の場合には、前記各蓄電器２８−１〜２８−ｎ
の電荷を放電側に所望に放電させるとともに、前記検出
電流値が前記最小電流値未満の場合には、前記各蓄電器
２８−１〜２８−ｎの電荷の放電を停止させるべく前記
各放電スイッチ３０−１〜３０−ｎに開閉駆動信号を出
力するゲート回路３６とを有している。A charging/discharging control section 25 that controls the charging/discharging section 24 includes a voltage detector 32 that detects charging voltage values supplied to the capacitors 28-1 to 28-n, and a charging voltage setting section 37 of the processing condition control section 10. a voltage comparator 33 that compares the set charging voltage value set by the voltage detector 32 with the detected charging voltage value detected by the voltage detector 32; and a current value of the charge discharged into the gap 19 between the workpiece 2 and the electrode 4. a current detector 34 for detecting the current value, a current comparator 35 for comparing the minimum current value set by the minimum current setting unit 40 of the machining condition control unit 10 and the discharge current value detected by the current detector 34; If the detected current value is equal to or greater than the minimum current value based on the inputs from the pulse generator 38, current waveform setting unit 39, and current comparator 35 of the processing condition control unit IO, each of the capacitors 28-1 to 28 -n
The respective discharge switches 30 are configured to discharge the electric charge to the discharge side as desired, and to stop discharging the electric charge of each of the capacitors 28-1 to 28-n when the detected current value is less than the minimum current value. -1 to 30-n, and a gate circuit 36 that outputs an opening/closing drive signal.
また、この充放電制御部２５を制御する制御装置１２の
加工条件制御部ＩＯは、充電電圧設定部３７と、パルス
発生部３８と、電流波形設定部３９と、最小電流設定部
４０と、前記人力装置１３の入力データに基づき加工条
件等を演算・処理するＣ Ｐ ０４１等からなる。なお
、第４図中符号４２は放電スイッチ３０−１〜３０−ｎ
の開時に逆起電力により各放電スイッチ３０−１〜３０
−ｎが破壊するのを防止するダイオードである。Further, the machining condition control section IO of the control device 12 that controls the charge/discharge control section 25 includes a charging voltage setting section 37, a pulse generation section 38, a current waveform setting section 39, a minimum current setting section 40, and the above-mentioned. It consists of a C P 041 and the like that calculates and processes machining conditions and the like based on the input data of the human-powered device 13. Note that the reference numeral 42 in FIG. 4 indicates the discharge switches 30-1 to 30-n.
When the discharge switches 30-1 to 30 are opened, each discharge switch 30-1 to 30 is
- This is a diode that prevents n from being destroyed.
前記人力装置１３は、被加工物２の材質と表面積、仕上
げ加工しろと寸法精度の等級、仕上げ面粗度及び加工電
極間隙等を人力し、これらの各信号を制御装置１２のモ
ータ駆動制御部９及び°加工条件制御部ＩＯに出力する
。The human power device 13 manually inputs the material and surface area of the workpiece 2, the finishing margin, the grade of dimensional accuracy, the finished surface roughness, the machining electrode gap, etc., and sends these signals to the motor drive control section of the control device 12. 9 and ° are output to the machining condition control unit IO.
前記電解液濾過装置１４と電解液供給装置１５は、電解
液制御部１１からの制御信号に基づいて、加工で生じた
電解生成物を含む電解液を電解液濾過装置１４て前記電
極４に設けた孔４Ｇから吸引回収して濾過するとともに
、この濾過した新鮮な電解液を電解液供給装置１５によ
り、前記間隙１９に指向する如く配設した噴出ノズル６
４から一定の液圧て噴出するものであり、例えば第５図
に示す如く構成する。The electrolyte filtration device 14 and the electrolyte supply device 15 provide the electrode 4 with an electrolyte containing electrolytic products generated during processing based on a control signal from the electrolyte control unit 11. The filtered fresh electrolyte is collected by suction through the hole 4G and filtered, and the filtered fresh electrolyte is sent to the spout nozzle 6 arranged so as to be directed toward the gap 19 by the electrolyte supply device 15.
The liquid is ejected at a constant pressure from 4, and is constructed as shown in FIG. 5, for example.
第５図において、電解液濾過装置１４は、電解生成物を
多く含んだ電解液４５を貯留するダーティタンク４８と
、このダーティタンク４８の電解液４５を電磁ポンプ４
９で汲み上げ、フィルタ５０を通してからモータ５１の
回転により遠心分離処理する遠心分離機５２と、この遠
心分離機５２で分前処理した電解生成物を含まない電解
液４４を貯留するクリーンタンク５３と、前記ダーティ
タンク４８の液面を検出する上限フロートスイッチ５４
及び下限フロートスイッチ５５とを有している。In FIG. 5, the electrolytic solution filtration device 14 includes a dirty tank 48 that stores an electrolytic solution 45 containing a large amount of electrolytic products, and an electromagnetic pump 4 that collects the electrolytic solution 45 in the dirty tank 48.
a centrifugal separator 52 that pumps up the electrolytic solution 44 at step 9, passes it through a filter 50, and performs centrifugal separation by rotation of a motor 51; Upper limit float switch 54 for detecting the liquid level of the dirty tank 48
and a lower limit float switch 55.
また、前記電解液濾過装置１４は、逆止弁５８９．５９
を介してそれぞれ前記ロッド１８の孔６５とダーティタ
ンク４８とに連結した第１のシリンダ５６と、この第１
のシリンダ５６に直列に連結した第２のシリンダ５７と
、この第２のシリンダ５７に電磁弁６０を介して連結し
たコンプレッサ６１とを有している。なお、４７は電解
液４３０オーバーフロー用の排出管である。Further, the electrolyte filtration device 14 includes a check valve 589.59.
a first cylinder 56 connected to the hole 65 of the rod 18 and the dirty tank 48, respectively, via a first cylinder 56;
The compressor 61 has a second cylinder 57 connected in series to the cylinder 56 and a compressor 61 connected to the second cylinder 57 via a solenoid valve 60. Note that 47 is a discharge pipe for overflowing the electrolytic solution 430.
前記電解液供給装置１５は、クリーンタンク５３の電解
液４４を汲み上げる電磁ポンプ６２と、この電磁ポンプ
６２と前記噴出ノズル６４間に接続した電磁弁６３とか
らなる。The electrolyte supply device 15 includes an electromagnetic pump 62 that pumps up the electrolyte 44 in the clean tank 53, and an electromagnetic valve 63 connected between the electromagnetic pump 62 and the jet nozzle 64.
そして、この電解液濾過装置１４及び電解液供給装置１
５を制御する電解液制御部１１は、加工条件制御部１０
からの制御信号に基づいて、コンプレッサ６１を作動さ
せて第１及び第２のシリンダ５６．５７を作動さぜ、間
隙１９の電解生成物を含む電解液４３を孔４６及び６５
から吸引してダーティタンク４８へ回収するとともに、
この回収した電解液４５を前記電磁ポンプ４９、モータ
５１等を作動させて濾過し、そして、この濾過した電解
液４４を電磁ポンプ６２を作動させて噴出ノズル６４か
ら間隙１９に噴出する如く制御する。The electrolyte filtration device 14 and the electrolyte supply device 1
The electrolyte control unit 11 that controls the processing condition control unit 10
The compressor 61 is actuated to actuate the first and second cylinders 56,57 to transfer the electrolytic solution 43 containing the electrolytic products in the gap 19 to the holes 46 and 65.
At the same time as suctioning from the tank and collecting it in the dirty tank 48,
The collected electrolytic solution 45 is filtered by operating the electromagnetic pump 49, motor 51, etc., and the filtered electrolytic solution 44 is controlled to be ejected from the ejection nozzle 64 into the gap 19 by operating the electromagnetic pump 62. .
次に、この電解加工装置の動作を仕上げ加工方法に基づ
いて説明する。Next, the operation of this electrolytic processing apparatus will be explained based on the finishing method.
仕上げ加工に際しては、被加工物固定装置３に例えば放
電加工によって所望形状に加工した被加工物２を固定す
るとともに、電極固定装置５のロッド１８の下端に前記
放電加工時に使用した電極４を固定し、この電極４を下
降してその電極面４ａを、被加工物２の被加工面２ａに
対向接触させ、電極４を被加工物２とともに加工槽１６
の電解液４３内に浸漬する。そしてこの位置を原点Ａと
し、入力装置１３によって人力され前記ＣＰ Ｕ４１に
設定された所定の間隙１９を保つ位置に電極４を上昇し
、電解液４３が被加工面２ａと電極面４ａとの間隙１９
に満ち、電解液４３が静止（電解液４３の流れ・動きが
略停止した状態をいう）したら仕上げ加工を開始する。During finishing, the workpiece 2 machined into a desired shape by electric discharge machining, for example, is fixed to the workpiece fixing device 3, and the electrode 4 used during the electric discharge machining is fixed to the lower end of the rod 18 of the electrode fixing device 5. Then, the electrode 4 is lowered to bring its electrode surface 4a into opposing contact with the surface 2a to be processed of the workpiece 2, and the electrode 4 is placed together with the workpiece 2 in the processing tank 16.
It is immersed in the electrolyte solution 43 of. Then, using this position as the origin A, the electrode 4 is manually raised using the input device 13 to a position where a predetermined gap 19 set in the CPU 41 is maintained, and the electrolytic solution 43 closes the gap between the workpiece surface 2a and the electrode surface 4a. 19
When the electrolytic solution 43 becomes stationary (meaning a state in which the flow and movement of the electrolytic solution 43 has substantially stopped), finishing processing is started.
仕上げ加工の前期には、加工条件制御部１００制御信号
により、電源装置８から例えばパルス電流のオン時間が
５ｍ５ｅｃ以下で低電流密度の面粗度向上用のパルス電
流を被加工物２と電極４間に供給する。これにより、被
加工面２ａ素材が溶出する。所定のパルス電流を１回な
いし数回供給した後、所定の間隙１９を維持させた状態
で該間隙１９の電解生成物を含んだ電解液４５を、電解
液濾過装置１４のシリンダ５６．５７等の作動により、
前記孔４６及び６５から吸引してダーティタンク４８に
回収するとともに、この吸引動作と略連動して前記電解
液供給装置１５が作動し、電解液４４を噴出ノズル６４
から前記間隙１９に向けて噴出する。In the first half of finishing, a control signal from the machining condition control unit 100 is used to apply a pulse current to the workpiece 2 and the electrode 4 from the power supply 8 with a pulse current on time of 5 m5ec or less and a low current density to improve the surface roughness. supply in between. As a result, the material of the processed surface 2a is eluted. After supplying a predetermined pulse current once or several times, while maintaining a predetermined gap 19, the electrolyte 45 containing the electrolytic products in the gap 19 is transferred to the cylinders 56, 57, etc. of the electrolyte filtration device 14. Due to the operation of
The electrolyte 44 is sucked through the holes 46 and 65 and collected into the dirty tank 48 , and the electrolyte supply device 15 is operated in substantially conjunction with this suction operation to send the electrolyte 44 to the jet nozzle 64 .
The liquid is ejected from the gap 19 toward the gap 19.
電解液４４を噴出した後は、電極４が下降し、電極面４
ａが被加工面２ａに接触する。これにより、前記原点Ａ
と現位置とを制御装置１２て比較して加工１回（１パル
スまたは数パルス毎の加工）当りの加工深さを測定する
。その後、前記被加工面２ａと電極面４ａが所定の間隙
１９を保つように電極４が再び上昇し、電解液４３が被
加工面２ａと電極面４ａ間に満ち、電解液４３が静止し
たらパルスを供給して次の加工を行う。After spouting the electrolyte 44, the electrode 4 descends and the electrode surface 4
a contacts the processed surface 2a. As a result, the origin A
and the current position are compared using the control device 12 to measure the machining depth per machining process (machining every one pulse or several pulses). After that, the electrode 4 rises again so that the predetermined gap 19 is maintained between the surface to be processed 2a and the electrode surface 4a, the electrolytic solution 43 is filled between the surface to be processed 2a and the electrode surface 4a, and when the electrolytic solution 43 is stationary, a pulse is generated. is supplied for the next processing.
ここで、電解液濾過装置１４及び電解液供給装置１５の
動作について説明する。Here, the operations of the electrolytic solution filtering device 14 and the electrolytic solution supplying device 15 will be explained.
所定回数の加工が終了すると、電解液制御部１１がコン
プレッサ６１に信号を出力し、シリンダ５７にエアーを
供給してピストン５７ａを図中ア方向に移動させる。こ
れにより、ピストン５７ａと直列に連結されたシリンダ
５６のピストン５６ａが同じくア方向に移動し、この移
動により、前記孔４６及び６５を介して間隙１９の電解
液４５が汲み上げられ、シリンダ５６の室Ａ内に所定量
貯留される。そして所定量の電解液４５が室Ａ内に貯留
されると、電解液制御部１１がコンプレッサ６１に信号
を出力し、電磁弁６０を作動させてシリンダ５７内のエ
アーを排出する。When a predetermined number of machining operations are completed, the electrolytic solution control unit 11 outputs a signal to the compressor 61 to supply air to the cylinder 57 and move the piston 57a in the direction A in the figure. As a result, the piston 56a of the cylinder 56 connected in series with the piston 57a similarly moves in the A direction, and as a result of this movement, the electrolytic solution 45 in the gap 19 is pumped up through the holes 46 and 65, and the A predetermined amount is stored in A. When a predetermined amount of the electrolytic solution 45 is stored in the chamber A, the electrolytic solution control section 11 outputs a signal to the compressor 61 to operate the solenoid valve 60 to discharge the air in the cylinder 57.
これにより、ピストン５７ａがイ方向に移動するととも
に、シリンダ５６のピストン５６ａもイ方向に移動して
室Ａ内の電解液４５を逆止弁５９を介してダーティタン
ク４８に排出する。なお、電解液４５は逆止弁５８．５
９により所定方向以外への流入が阻止される。As a result, the piston 57a moves in the A direction, and the piston 56a of the cylinder 56 also moves in the A direction to discharge the electrolytic solution 45 in the chamber A into the dirty tank 48 via the check valve 59. Note that the electrolyte 45 is connected to a check valve 58.5.
9 prevents the water from flowing in directions other than the predetermined direction.
間隙１９の電解生成物を含んだ電解液４５が孔４６、孔
６５、逆止弁５８、シリンダ５６の室Ａ、逆止弁５９を
介してダーティタンク４８に貯留されると、その液面レ
ベルが、上・下のフロートスイッチ５４．５５で検出さ
れて電解液制御部１１に入力される。電解液制御部１１
は、ダーティタンク４８内の液面レベルが所定値に達し
たら、即ち液面レベルが上・下のフロートスイッチ５４
．５５開にある時、電磁ポンプ４９に駆動信号を出力し
、ダーティタンク４８内の電解液４５を汲み上げ、フィ
ルタ５０を通して遠心分離機５２に送出する。When the electrolytic solution 45 containing the electrolytic products in the gap 19 is stored in the dirty tank 48 via the hole 46, the hole 65, the check valve 58, the chamber A of the cylinder 56, and the check valve 59, the liquid level is detected by the upper and lower float switches 54 and 55 and input to the electrolyte control section 11. Electrolyte control section 11
When the liquid level in the dirty tank 48 reaches a predetermined value, the float switch 54 is activated when the liquid level is up or down.
．． When 55 is open, a drive signal is output to the electromagnetic pump 49 to pump up the electrolyte 45 in the dirty tank 48 and send it to the centrifuge 52 through the filter 50.
遠心分離機５２は、電解液制御部１１の制御信号により
モータ５１が回転し、電解液４５を分離処理する。In the centrifugal separator 52, a motor 51 rotates in response to a control signal from the electrolyte control unit 11, and the electrolyte 45 is separated.
そして、分離処理された電解生成物を含まない電解液４
４は、クリーンタンク５３に貯留され、このクリーンタ
ンク５３に貯留された電解液４４は、電解液制御部１１
の制御信号により電解液供給装置１５の電磁ポンプ６２
が作動して汲み上げ、電磁弁６３を介して噴出ノズル６
４から一定の液圧て前記間隙１９に噴出する。Then, an electrolytic solution 4 that does not contain the separated electrolytic products
4 is stored in a clean tank 53, and the electrolytic solution 44 stored in this clean tank 53 is transferred to the electrolytic solution control section 11.
The electromagnetic pump 62 of the electrolyte supply device 15 is activated by the control signal of
operates to pump up the water and send it to the jet nozzle 6 via the solenoid valve 63.
4, a constant liquid pressure is ejected into the gap 19.
このように、この発明によれば間隙１９の電解生成物を
含んだ電解液４５を、電極に設けた一端が間隙Ｉ９に開
口する孔４６から吸引排除するため、加工で生成した電
解生成物を間隙１９外に拡散させることが少なく、加工
槽１６内の電解液の汚濁度を低く押えることができると
ともに、吸引と略同時に新鮮な電解液４４を噴出するた
め、被加工面２ａ及び電極面４ａに付着した電解生成物
等を排除することができ、間隙１９の電解生成物を確実
に除去し得る。As described above, according to the present invention, the electrolytic solution 45 containing the electrolytic products in the gap 19 is sucked and removed from the hole 46 provided in the electrode, one end of which opens into the gap I9. It is possible to suppress the degree of contamination of the electrolytic solution in the machining tank 16 by minimizing diffusion outside the gap 19, and because the fresh electrolytic solution 44 is ejected almost simultaneously with suction, the surface to be processed 2a and the electrode surface 4a are It is possible to remove the electrolytic products etc. that have adhered to the gap 19, and the electrolytic products in the gap 19 can be reliably removed.
以上のような仕上げ加工を制御装置１２の指令により所
定回数繰り返し、前記加工深さの累積値が、入力装置１
３て人力された人力データに基づいて加工条件制御部ｌ
Ｏで計算した加工深さの設定値と比較し、加工深さ累積
値が加工深さ設定値に対し、所定の差（例えば１μｍ）
以内になった時に、ＣＰＵ４１が電流波形設定部３９に
制御信号を出力し、電源装置８のパルスを電流密度が仕
上げ加工前期の電流密度の３／２を越える光沢面形成用
のパルスに切換える。そして、このパルスで前述したと
同様の方法により所定回数の加工を行い仕上げ加工を終
了する。The finishing process as described above is repeated a predetermined number of times according to a command from the control device 12, and the cumulative value of the machining depth is determined by the input device 1.
3. The processing condition control unit l based on the human data obtained manually.
Compare with the machining depth setting value calculated in
When the current density is within 3/2, the CPU 41 outputs a control signal to the current waveform setting section 39, and switches the pulse of the power supply 8 to a pulse for forming a glossy surface in which the current density exceeds 3/2 of the current density in the first half of the finishing process. Then, using this pulse, machining is performed a predetermined number of times in the same manner as described above, and finishing machining is completed.
第６図はこの発明の他の実施例を示し、上記実施例と同
一構成部分については同一符号を付してその説明を省略
する。この実施例の特徴は、間隙Ｉ９の電解液４５の吸
引排除及び間隙１９への新鮮な電解液４４の供給を、電
極４に設けた孔４６（ロッド１８の孔６５も含む）から
交互に行うようにした点にある。FIG. 6 shows another embodiment of the present invention, and the same components as those in the above embodiment are designated by the same reference numerals and the explanation thereof will be omitted. The feature of this embodiment is that the electrolytic solution 45 in the gap I9 is sucked out and the fresh electrolytic solution 44 is supplied to the gap 19 alternately through the hole 46 provided in the electrode 4 (including the hole 65 in the rod 18). The point is that I did it like this.
そのため、孔４６と第１のシリンダ５６及び電磁弁６３
との間に切換弁６６を設け、この切換弁６６を電解液制
御部１１０制御信号により切換る。すなわち、間隙Ｉ９
の電解液を吸引排除する場合は、切換弁６６を第１のシ
リンダ５６側に切換え、間隙１９の電解液を孔４６→孔
６５→切換弁６６→逆止弁５８→第１のシリンダ５６の
室Ａ→逆止弁５９を介してダーティタンク４８に回収し
、間隙１９に新鮮な電解液４４を噴出する場合は、切換
弁６６を電解液供給装置１５側に切換え、電解液４４を
電磁ポンプ６２→電磁弁６３→切換弁６６→孔６５→孔
４６を介して間隙１９に噴出する。Therefore, the hole 46, the first cylinder 56 and the solenoid valve 63
A switching valve 66 is provided between the electrolytic solution controller 110 and the switching valve 66 is switched by a control signal from the electrolyte control section 110. That is, the gap I9
When removing the electrolytic solution by suction, switch the switching valve 66 to the first cylinder 56 side, and transfer the electrolytic solution in the gap 19 from the hole 46 to the hole 65 to the switching valve 66 to the check valve 58 to the first cylinder 56. When collecting fresh electrolyte 44 from chamber A to dirty tank 48 via check valve 59 and spouting fresh electrolyte 44 into gap 19, switch valve 66 to the electrolyte supply device 15 side and transfer electrolyte 44 to electromagnetic pump. 62 → solenoid valve 63 → switching valve 66 → hole 65 → ejected into gap 19 via hole 46.
なお、上記実施例においては、電極に１個の孔を設けた
場合について説明したが、電極に複数の孔を設けてもよ
く、また、電解液供給装置として一対のシリンダを設け
た場合について説明したが、例えばポンプとタイマーレ
ディー機能を有する電磁開閉器とを組み合わせて構成し
てもよい。In addition, in the above embodiment, the case where one hole was provided in the electrode was explained, but the electrode may be provided with a plurality of holes, and the case where a pair of cylinders were provided as the electrolyte supply device was explained. However, for example, a pump and an electromagnetic switch having a timer ready function may be combined.
［発明の効果］
以上詳細に説明したように、この発明に係る電解加工装
置にあっては、加工槽内で電解液を介して対設した被加
工物と電極間にパルス電流を供給するとともに、前記被
加工物と電極との間隙に生成した電解生成物を除去しな
がら被加工物を仕上げ加工する電解加工装置において、
一端が前記間隙に開口する如く前記電極に配設した孔か
ら前記電解生成物を含む電解液を吸引、回収して濾過す
る電解液濾過装置と、該電解液濾過装置で濾過した電解
液を前記間隙に間欠的に噴出する電解液供給装置と、該
電解液供給装置によって前記間隙に噴出した電解液が静
止した場合に前記被加工物と電極間にパルス電流を供給
する電源装置とて構成したので、被加工物と電極との間
隙に生成される電解生成物を確実に除去し得るとともに
、加工槽内の電解液の汚濁度を低くし得て、被加工面全
域に亘り加工条件が均一となり、高精度かつ微小面粗度
の鏡面状光沢を呈した三次元金属表面を短時間に得るこ
とができる。[Effects of the Invention] As explained in detail above, in the electrolytic processing apparatus according to the present invention, a pulse current is supplied between the workpiece and the electrodes that are disposed opposite to each other via the electrolyte in the processing tank, and , in an electrolytic processing apparatus that finishes processing a workpiece while removing electrolytic products generated in the gap between the workpiece and the electrode,
an electrolytic solution filtration device that sucks, collects and filters the electrolytic solution containing the electrolytic product through a hole provided in the electrode such that one end opens into the gap; An electrolytic solution supply device that intermittently sprays into the gap, and a power supply device that supplies a pulse current between the workpiece and the electrode when the electrolytic solution sprayed into the gap by the electrolytic solution supply device comes to rest. Therefore, it is possible to reliably remove electrolytic products generated in the gap between the workpiece and the electrode, and also to reduce the degree of contamination of the electrolyte in the processing tank, ensuring uniform processing conditions over the entire surface to be processed. As a result, a three-dimensional metal surface with high precision and a mirror-like luster with minute surface roughness can be obtained in a short time.
第１図はこの発明に係る電解加工装置を示す正面図、第
２図は同装置の側面図、第３図は同装置の概略構成図、
第４図は電源装置を示すブロック図、第５図は電解液濾
過装置及び電解液供給装置を示す概略構成図、第６図は
他の実施例を示す概略構成図である。
１・・・電解加工装置、２・・・被加工物、４・・・電
極、８・・・電源装置、９・・・モータ駆動制御部、１
゜・・・加工条件制御部、１１・・・電解液制御部、１
２・・・制御装置、１４・・・電解液濾過装置、１５・
・・電解液供給装置、１６・・・加工槽、４１・・・Ｃ
ＰＵ、４６．６５・・・孔、５６．５７・・・シリンダ
、６１・・・コンプレッサ、６４・・・噴出ノズル、６
６・・・切換弁。
特許出願人 静岡製機株式会社
代表者 鈴 木 重 夫FIG. 1 is a front view showing an electrolytic processing device according to the present invention, FIG. 2 is a side view of the device, and FIG. 3 is a schematic configuration diagram of the device.
FIG. 4 is a block diagram showing a power supply device, FIG. 5 is a schematic diagram showing an electrolyte filtering device and an electrolyte supply device, and FIG. 6 is a schematic diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Electrolytic processing device, 2... Workpiece, 4... Electrode, 8... Power supply device, 9... Motor drive control part, 1
゜... Processing condition control section, 11... Electrolyte control section, 1
2... Control device, 14... Electrolyte filtration device, 15.
... Electrolyte supply device, 16... Processing tank, 41...C
PU, 46.65...hole, 56.57...cylinder, 61...compressor, 64...spray nozzle, 6
6...Switching valve. Patent applicant: Shigeo Suzuki, representative of Shizuoka Seiki Co., Ltd.
Claims (4)
極間にパルス電流を供給するとともに、前記被加工物と
電極との間隙に生成した電解生成物を除去しながら被加
工物を仕上げ加工する電解加工装置において、 一端が前記間隙に開口する如く前記電極に配設した孔か
ら前記電解生成物を含む電解液を吸引、回収して濾過す
る電解液濾過装置と、該電解液濾過装置で濾過した電解
液を前記間隙に間欠的に噴出する電解液供給装置と、該
電解液供給装置によって前記間隙に噴出した電解液が静
止した場合に前記被加工物と電極間にパルス電流を供給
する電源装置とを備えた電解加工装置。(1) A pulse current is supplied between the workpiece and the electrode, which are placed opposite each other, through an electrolyte in the processing tank, and the workpiece is processed while removing electrolytic products generated in the gap between the workpiece and the electrode. An electrolytic processing device for finishing processing an object includes: an electrolytic solution filtration device that sucks, collects and filters an electrolytic solution containing the electrolytic product through a hole provided in the electrode such that one end opens into the gap; an electrolytic solution supply device that intermittently sprays an electrolytic solution filtered by a liquid filtration device into the gap, and a pulse between the workpiece and the electrode when the electrolytic solution sprayed into the gap by the electrolytic solution supply device comes to rest; An electrolytic processing device equipped with a power supply device that supplies current.
引動作と略同時に電解液を噴出することを特徴とする特
許請求の範囲第１項記載の電解加工装置。(2) The electrolytic processing apparatus according to claim 1, wherein the electrolytic solution supply device spouts out the electrolytic solution substantially simultaneously with the suction operation of the electrolytic solution filtration device.
した噴出ノズルから電解液を噴出することを特徴とする
特許請求の範囲第１項または第２項記載の電解加工装置
。(3) The electrolytic processing apparatus according to claim 1 or 2, wherein the electrolytic solution supply device jets out the electrolytic solution from a jet nozzle that is disposed toward the gap.
電解液を噴出することを特徴とする特許請求の範囲第１
項記載の電解加工装置。(4) Claim 1, wherein the electrolyte supply device spouts the electrolyte from a hole provided in the electrode.
Electrolytic processing equipment as described in section.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272843A JPH01115516A (en) | 1987-10-28 | 1987-10-28 | Electrochemical machine |
| KR1019870015395A KR910008243B1 (en) | 1987-06-23 | 1987-12-30 | Electro-chemical machine |
| US07/206,482 US4880516A (en) | 1987-06-23 | 1988-06-13 | Electro-chemical machine |
| EP88109530A EP0296476A3 (en) | 1987-06-23 | 1988-06-15 | Electro-chemical machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272843A JPH01115516A (en) | 1987-10-28 | 1987-10-28 | Electrochemical machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01115516A true JPH01115516A (en) | 1989-05-08 |
Family
ID=17519548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62272843A Pending JPH01115516A (en) | 1987-06-23 | 1987-10-28 | Electrochemical machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01115516A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03131424A (en) * | 1989-10-11 | 1991-06-05 | Shizuoka Seiki Co Ltd | Processing liquid controller for electro-chemical finishing machine |
| JP2004002910A (en) * | 2002-05-30 | 2004-01-08 | Ebara Corp | Electrolytic working method and apparatus |
| JP2004060027A (en) * | 2002-07-31 | 2004-02-26 | Ebara Corp | Electro-chemical machining method and apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211940A (en) * | 1975-07-18 | 1977-01-29 | Agency Of Ind Science & Technol | Hologram regeneration apparatus |
| JPS5271794A (en) * | 1975-12-12 | 1977-06-15 | Nippo Tsushin Kogyo Kk | Device for exhausting machining liquid for discharge machining |
-
1987
- 1987-10-28 JP JP62272843A patent/JPH01115516A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211940A (en) * | 1975-07-18 | 1977-01-29 | Agency Of Ind Science & Technol | Hologram regeneration apparatus |
| JPS5271794A (en) * | 1975-12-12 | 1977-06-15 | Nippo Tsushin Kogyo Kk | Device for exhausting machining liquid for discharge machining |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03131424A (en) * | 1989-10-11 | 1991-06-05 | Shizuoka Seiki Co Ltd | Processing liquid controller for electro-chemical finishing machine |
| JP2004002910A (en) * | 2002-05-30 | 2004-01-08 | Ebara Corp | Electrolytic working method and apparatus |
| JP2004060027A (en) * | 2002-07-31 | 2004-02-26 | Ebara Corp | Electro-chemical machining method and apparatus |
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