JPS5997816A - Wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To facilitate maintenance of a filter device and also attain cost reduction, by adapting the filter disposed on the filter device to be replaceable from the device so that the filter may be washed and reused. CONSTITUTION:A filter device 9 is formed of a water passing cylinder 41 provided with water passing holes 31 for permitting a working liquid to pass therethrough and a filter 34 disposed on the periphery of a supporting ring assembly 35. These parts are replaceably held between a top cover 39 and a bottom cover 40 provided with screw threads. When the filter 34 becomes clogged with powder of the work, the filter only can be replaced for washing away the metal powder. The filter can thus be reused.

Description

【発明の詳細な説明】[Detailed description of the invention]

この発明はワイヤ力・ソト放電加装置置憂こ係り、特に
加工液供給装置の改良をねらいとして４ｃさね１こもの
である。 一般に、ワイヤ力・ント放電加装置＠はワイヤ電極と被
加工物とを微小間隙を隔てて対向させ、こねを比抵抗値
が調整さｆ″１１１１コ水加工液で被うとともｌこ上記
間隙（こ断続パルス電流を供給１．てアーケ放電を行な
い、この放電にまる高密度エネルギーによって加工賃る
も（１で、このとき加工金属粉（ま加工液中に微粒粉と
（・て飛散される。 そ」・で、この加工液は、放電加工装置本体に設けられ
、加工液が貯えらねる清水槽からポンプによって加工部
分に供給さね、微粒金属粉の混入し。 １こ使用済の加工液が受は皿を経て汚水槽に回収される
８この使用済の加工液は吸引ポンプによってフィルタに
送給さね、金属粉が濾過さねて清水となり再び清水槽に
返戻さオ］る。 第１図〜第３図は従来のワイヤ力・ント放電加工装置に
用いらｒする加工液供給装置を示１，１・もの了・、第
１図は加工液循環経路の供給系統図、第２図はフィルタ
部の側面断面図、第３図は第２図のｍ−■線断面図であ
る８ こわらの図に寸づいて、（１）ｆ、ｆ貯留槽であり、こ
の貯留槽は放電加工装置本体（こおいて放電加工ＬＴコ
金属粉を含む汚水が配管（２）を介１．て流入する汚水
槽（３）とフィルタ（９）を通じて濾過さね１こ加工液
を貯留する清水槽（４）が固定の堰板（５）により＝分
さねτいる。ま１こ、上記汚水槽（３）より配管（６）
を経由（・て濾過ポンプ（７）により汲み上げらｔｌｌ
こ汚水は配管（８）によりフィルタ（９）に送り込まね
る、フィルタ（９）により濾過さね１こ清水１ま配管（
１０により清水槽（４）（こ貯留される。０１）は圧力
計で、この圧力計によって配管（８）の圧力を検出し７
、一定の圧力値に到達［２１コことを知ってフィルタ交
換する際の目標値読取りと（・て使用される８清水槽（
４）に貯留された清水は配管０■を通じて供給ポンプｏ
３により吸引さね配管θカを経由１．放電加工装置本体
加工部・＼供給される。 ０９は加工液供給装置のル制御装置で・あり、この制御
装置０■こは加工に供さねる清水の純水器、即ち比抵抗
値を設定する回路が内蔵さねている、この比抵抗値を測
定する測定器ＯＱは配管Ｑ４）より分岐さね１こ配管ａ
ηに配置Ａれている。 ０８）は制御装置０９と測定器ａＱとの導電路を示す。 この導電路０８）により測定さね１こ清水の比抵抗値が
信号とThe present invention is a 4C-type workpiece with the aim of improving wire force/somatic discharge equipment, particularly machining fluid supply equipment. Generally, in a wire force/discharge device @, a wire electrode and a workpiece are placed opposite to each other with a minute gap in between, and the specific resistance value of the kneading device is adjusted and covered with a water machining fluid. (In step 1, an intermittent pulsed current is supplied to generate arc discharge, and the high-density energy contained in this discharge is used to perform machining.) So, this machining fluid is supplied to the machining part by a pump from a clear water tank provided in the electrical discharge machining equipment body and does not store machining fluid, and fine metal powder may be mixed in. The processing fluid is collected into the sewage tank through the tray.8 This used processing fluid is sent to the filter by the suction pump, and the metal powder is not filtered out to become fresh water and returned to the sewage tank. 1 to 3 show machining fluid supply devices used in conventional wire force discharge machining equipment. Figure 2 is a side sectional view of the filter section, and Figure 3 is a sectional view taken along the line m-■ in Figure 2. The tank is the main body of the electrical discharge machining equipment (here, electrical discharge machining LT) Waste water containing metal powder flows into the tank (3) through the pipe (2), and the machining fluid is filtered through the filter (9). The fresh water tank (4) to be stored is separated by a fixed weir plate (5).Then, the pipe (6) is connected to the sewage tank (3).
The water is pumped up by the filtration pump (7) via
The dirty water is sent to the filter (9) through the pipe (8).
The fresh water tank (4) (this is stored by 10.01) is a pressure gauge, and this pressure gauge detects the pressure in the piping (8).
, Reaching a certain pressure value [21] Knowing that the target value is read when replacing the filter (・ 8 fresh water tanks used (
4) The fresh water stored in
1. Electrical discharge machining equipment main processing section/\supplied. 09 is a control device for the machining fluid supply device, and this control device 0 is a deionizer for fresh water that is not used for processing, that is, a circuit for setting the resistivity value is built in. The measuring device OQ that measures the value is connected to the pipe Q4) with one tongue branched from the pipe a.
It is placed A at η. 08) shows a conductive path between the control device 09 and the measuring device aQ. This conductive path 08) allows the specific resistance value of the fresh water to be measured as a signal.

【７で制御装置０９に送信される。仮に比抵抗値
を測定器０１ｊこ−１−り測定（７、制御装置０均にお
いて設定さ）１１コ比抵抗ｆｏ１と比較（・て目標値に
達］、ていｒｒい場合１才制御装置（１５１より導電路
（１呻を介１．τ水路切換弁翰に電気信号か送らｔ）水
路切換弁の）をクローズポジションＣ１）からオーブン
ポジション（イ）（こ切換λる、この水路切換弁（イ）
の切換作用によりフィルタ（９）において濾過さｆｌＴ
二清水は、水路切換弁い）のオーブンポジション（２）
を経由１て純水器（至）に送り込まｉする。この純水器
２漫には清水の比抵抗値を増大させるｙ、＝めの物質（
通常Ｉｔイオン交換樹脂）が規Ｔ鼠充填さねでいる、純
水器（ハ）に送り込才ノ］１こ清水は比抵抗値が調整さ
ね、配管■により清水槽（４）に貯留される。（ハ）は
汚水槽ドレーンバルブ、（イ）１オ清水槽ドレーンバル
ブである。 次ｌこ、第１図の加工液供給系統図１こおいて説明Ｉ７
Ｔこフィルタ（９）を第２図、第８図ζこより詳述する
。 フィルタ（９）はＦＩｉ牢ａ容器内に収納さねでおり、
その構成は次のようにｒｒつている。Ｃ２７）は上蓋、
に）は下蓋−ρ、こｆｌらの上蓋−と下蓋（ハ）とはボ
ス翰によって固定さねでいる。、（７）は通水筒で、こ
ノ通水筒（１）には清水を通す通水穴０１）が多数あけ
らね丁いる８ま１こボス翰および通水筒（１）は一体と
なっている。０のｌオ芯穴で、この８穴（（２ｉと中空
の８棒（図示せず）が通さねτ、このフィルタ（９）を
加工液供給袋！本体＋こ取付は下いる。Ｂｌｕフィルタ
本体の保護膜であり表面には多数の穴があけらねでいる
。 ■は加工液に混入」・１こ金属粉を分離する濾過体で、
数μｍの穴が設けらねでいる。Ｃ１ｔｉｔ支時環で、加
工液が濾過体■に外から浸透するとき、濾過体（財）を
外圧から保護する。 次に加工液の流れについて説明する。 加工液は配管（８）を通じて第２図にホ（）１こフィル
タ（９）が収納されている容器内に入りフィルタ（９）
に至る。容器内に入−１・ｒｖ加工液はフィルタ保護膜
（ハ）を経て濾過体■を通り、通水穴０ηから通水筒（
７）内に入る、このとき、１濾過体（財）の穴は数μ■
）で、Ｌｌ）放電加工によって加工さねｔコ加工粉は濾
過体の穴より大きい１こめ、濾過体表面に付着【・て加
工液のみが濾過体（ロ）を通過し・この段階にて清水と
なる。 通水筒！１１こ入つ現清水はフィルタ（９）を収納する
容器と一体に形成さねｒコ芯棒の中空部を通って配管Ｏ
Ｏより清水槽（４）に至る。 ところで、上記のすうに構成さねｔコ加工液供給装置に
おいて、フィルタ（９）　ｌ、を第２図に示すように濾
過体■が保護膜（ハ）及び支持環Ｃ（５で挾持さね、さ
らにこＪｌらが上蓋（イ）と下蓋（ハ）とによってボス
翰と一体的ｔこ固定さオ］ているので、このフィルタ（
９）に送り込まｔ−＋　ｆ：加工液を金属粉と清水とに
分離する際、濾過体（ロ）が目詰りを起［７寿命に達す
るとフィルタ（９）全体を加工液供給装置から取りは才
しこねを新しいものに取替えてい１こ。このことは、フ
ィルタが高価な１こめにフィルタ寿命の最大限まで使用
することをこ４ｒす濾過効果を低下させるという欠点が
ある。特に付着性の強いアルミニウムなどの金属におい
てはこれが顕著である。 ま１こ、汚水槽（３）においては、返戻さね１こ加工液
中の金属粉が微粒子である１こめ汚水槽に堆積すること
が少なくこねが漂遊しているので一層フィルタ（９）の
濾過寿命を短いもの（こ（ている、この発明は上記のよ
うな従来の欠点を除去するために４ｒさね１こもので、
〕〆ルタに配設さねる濾過体をフィルタから着脱自在に
構成し７、この濾過体を洗滌することによって金属粉を
除去【・て複数回再利用］７、寿命に達１，１コ後も濾
過体だけを取替λることによりフィルタの保守を容易に
するととも（こ費用の低減をはかることを目的とじてい
る、以下、この発明の一実施例を図について説明する、 第４図は加工液環循経路を示す供給系統図、第５図はフ
ィルタ部の側面断面図、第６図は第５図のｗ−ｗ線によ
る断面図である。こわらの図において、第１図〜第８図
と向−まＴコは相当部分（こは同一符号を付して説明を
省略する。 （至）は放電加工に供され金属粉を含む加工液が返戻さ
れる汚水槽で、この汚水槽（こ１．ｒ複数枚の自由堰（
ロ）が引上げ可能な状態でその底面が汚水槽（至）の底
部に接するよう平行に配設さねている、さらに上記自由
堰（ロ）の各間にはその底面が汚水槽（至）の底部と間
隙を有する固定堰弼が配設さねでいる、この１こめ、配
管（２）から流入する汚水は複数段の固定堰（至）と自
由堰（ロ）との間を図中矢印Ａに示すように流ね、沖過
ポンプ（７）で汲み上げらノする配管（６）の位置に達
する。このさき、配管（２）からの流入圧力は配管（６
）の部分にまでＩＪ波及しないので金属粉は汚水槽（至
）の底部に沈澱、堆積り、、フィルタ（９）に送給され
る加工液中に金属粉を含む量が著１．＜減少【、てそね
だけフィルタ寿命を延ばすことができる。 なお、汚水槽弼を清掃する際は自由堰（ロ）を引上げｉ
］ば汚水槽（至）は底部が連通ずるので汚水槽ドレーン
バルブ（イ）を開放することより容易に行１ｒつことか
できる、 次に、フィルタ（９）の構成について第５ｔ’１．　第
６図を用いて説明する、このフィルタ（９）は加工液を
通す通水穴０１）が多数あけられ１こ通水筒Ｇ１１）と
、この通水筒Ω】）の局部に配設さねる支持環と、さら
にこ゛の支持環（至）の周部に配設さｊる濾過体（ロ）
とからなり、こ第１らか上蓋（至）と下蓋（４０とによ
って挾持さねでいる、このとき、下蓋げ）及び下蓋００
と通水筒（４１）との係合部□□□にはそねぞね接続ね
じが形成さねており、着脱自在に螺着されてフィルタ全
体を固定］、τいる、 このＴコめ、濾過体（２）が加工金属粉番こより目詰り
を生じ濾過流量の減少等の機能低下を生じ１こ際は濾過
体■のみを取外ｊ２て洗滌を行なλるので、濾過体■か
ら加工金属粉が除去さね、こ′Ｉ′１を再利用すること
ができる。 なお、上記濾過体■や通水筒Ｇ１１）　）、？上蓋−及
び下蓋００に設けらｆ−ＩＴこ接続ねじで螺着さオ］る
ほか、上蓋−及び下蓋（ト）を貫通ｊ５て締付けらねる
ボルトナツトによって固着ｊ・でも上記実施例と同様の
効果を奏する、 以上のよう（ここの発明は、金属粉が含有される加工液
から金属粉だけを除去するフィルタの濾過体をフィルタ
本体き着脱自在に構成ｔ・１こので、濾過性能が低下す
るこ゛とに容易ζこ金属粉除去ができ、放電加工装置の
加工性能の向上をはかることができるとともにフィルタ
のコストを低減することができる効果がある。 ；さ、らに、複数段の自由堰と固定堰とから４でる沈澱
構造の汚水槽と併用すねば、一層、金属粉の除去効果を
向上させることができる。[7] is sent to the control device 09. If the specific resistance value is measured by the measuring device 01j (set at 7, the control device 0) and compared with the 11 specific resistance fo1 (reaches the target value), if 151 sends an electrical signal to the conductive path (1.τ of the waterway switching valve) from the closed position C1) to the oven position (A) (switching this waterway switching valve). stomach)
filtered in the filter (9) by the switching action of flT
For Nishimizu, the oven position (2) of the waterway switching valve
The water is sent to the deionizer (to) via 1. In this water purifier, there is a substance (y) that increases the specific resistance of fresh water (
The specific resistance value of the fresh water is not adjusted, and it is stored in the fresh water tank (4) through piping. be done. (c) is a sewage tank drain valve, and (b) is a 1-hole fresh water tank drain valve. Next, the machining fluid supply system in Figure 1 will be explained in Figure 1.
The T filter (9) will be explained in detail with reference to FIGS. 2 and 8. The filter (9) is stored in the FIi cell a container,
Its configuration is as follows. C27) is the upper lid,
The lower lid - ρ, and the upper lid and lower lid (c) of these two are fixed by boss wires. , (7) is a water tube, and the water tube (1) has many water holes 01) through which clean water passes.The 8mm boss holder and the water tube (1) are integrated. There is. 0's l O-core hole, this 8 hole ((2i and hollow 8 rod (not shown) should not pass through), insert this filter (9) into the machining fluid supply bag!Main body + this installation is done by lowering it.Blu filter It is a protective film for the main body and has many holes on its surface.
Holes of several micrometers are provided. C1tit protection ring protects the filter from external pressure when processing liquid penetrates into the filter from the outside. Next, the flow of the machining fluid will be explained. The machining fluid enters the container housing the filter (9) as shown in Figure 2 through the pipe (8) and passes through the filter (9).
leading to. The -1.rv processing liquid that enters the container passes through the filter protection membrane (c), the filter body ■, and flows through the water passage hole 0η to the water passage tube (
7) At this time, the holes in one filter body (goods) are several μ■
) At this stage, only the machining fluid passes through the filter (b). It becomes clear water. Water bottle! The 11 pieces of fresh water are piped through the hollow part of the core rod formed integrally with the container housing the filter (9).
O leads to the fresh water tank (4). By the way, in the processing liquid supply device constructed as described above, the filter (9) is held between the protective film (c) and the support ring C (5) as shown in FIG. , Furthermore, since the upper cover (a) and the lower cover (c) are integrally fixed to the boss holder, this filter (
9) t-+f: When separating the machining fluid into metal powder and clean water, the filter (b) becomes clogged [7] When the service life is reached, remove the entire filter (9) from the machining fluid supply device. I am replacing the old one with a new one. This has the disadvantage that the filter is expensive and reduces its filtration effectiveness, which makes it difficult to use the filter to its maximum lifespan. This is particularly noticeable with metals such as aluminum, which have strong adhesive properties. Also, in the sewage tank (3), the metal powder in the returning sewage is a fine particle, so the metal powder in the sewage tank is less likely to accumulate in the sewage tank, so the filter (9) is more In order to eliminate the above-mentioned drawbacks of the conventional filters, the filtration life is short.
〆The filter body installed in the filter is configured to be detachable from the filter 7, and the metal powder is removed by washing this filter body [・Reused multiple times] 7. After reaching the end of its service life. The purpose of this invention is to facilitate the maintenance of the filter by replacing only the filter body (lambda) and to reduce this cost.Hereinafter, one embodiment of the present invention will be explained with reference to the drawings, as shown in Fig. 4. 5 is a supply system diagram showing the machining fluid circulation path, FIG. 5 is a side sectional view of the filter section, and FIG. 6 is a sectional view taken along line w-w in FIG. 5. - Toward Fig. 8, T-co shows corresponding parts (these parts are given the same reference numerals and explanations are omitted. (to) is a sewage tank to which machining fluid containing metal powder is returned after being subjected to electrical discharge machining. This sewage tank (this 1.r multiple free weirs (
(b) are arranged parallel to each other so that the bottom surface touches the bottom of the sewage tank (to) in a state where it can be pulled up; A fixed weir with a gap between the bottom and the bottom of the pipe (2) is installed, and the sewage flowing in from the pipe (2) flows between the multiple stages of fixed weir (to) and free weir (b) as shown in the figure. The water flows as shown by arrow A and reaches the position of the pipe (6) where it is pumped up by the offshore pump (7). At this point, the inflow pressure from pipe (2) is
), the metal powder will settle and accumulate at the bottom of the sewage tank (to), and the amount of metal powder contained in the machining fluid fed to the filter (9) will be significant. <Decrease>, the life of the filter can be extended by the same amount. When cleaning the sewage tank, pull up the free weir (b).
] Since the bottom of the sewage tank (to) is open, it can be easily accessed by opening the sewage tank drain valve (a). This filter (9), which will be explained using FIG. 6, has a large number of water holes 01) through which the machining fluid passes, one water pipe G11), and a support disposed locally in this water pipe G11). ring and a filter body (b) disposed around the support ring (to).
It consists of the first upper cover (end) and the lower cover (40, in this case, the lower cover) and the lower cover 00.
A threaded connection screw is formed in the engaging part □□□ of the water tube (41) and is removably screwed to fix the entire filter. The filter body (2) becomes clogged with the processed metal powder, resulting in functional deterioration such as a decrease in the filtration flow rate.In this case, only the filter body (■) must be removed and cleaned. Once the processed metal powder is removed, it can be reused. In addition, the above filter body ■ and water tube G11) ), ? In addition to being screwed in with the connecting screws provided on the upper and lower lids (00), it is also possible to fix them with bolts and nuts that pass through the upper and lower lids (5) and tighten, but this is the same as in the above embodiment. As described above, the present invention has a structure in which the filtration body of the filter that removes only metal powder from the processing fluid containing metal powder is detachably attached to the filter body. It is possible to easily remove metal powder when it decreases, and it is possible to improve the machining performance of electrical discharge machining equipment and reduce the cost of filters.In addition, it is possible to reduce the cost of filters. If it is used in combination with a sewage tank having a sedimentation structure that comes out from a weir and a fixed weir, the metal powder removal effect can be further improved.

【図面の簡単な説明】[Brief explanation of drawings]

第１図〜第３図はそｉｌそね従来の加工液供給装置を示
［７、第１図は加工液循環経路の供給系統図、第２図は
フィルタ部の側面断面図、第３図ＩＪ第２図のト］線断
面図である。、第４図〜第６図はそれそ７′？この発明
の一実施例による加工液供給装置を示し、第４図１．を
加工液循環経路の供給系統図、第５図はフィルタ部の側
面断面図、第６図１．′ｒ第５図のＭ−Ｍ線断面図であ
る。 図において、同一符号は同一ま１こは相当部分を示［７
、（１）は貯留槽、（２）、　（６）は配管、（４）＋
、を清水槽、（７）は濾過ポンプ、（９）はフィノ１り
、（ホ）はドレンバルブ、０Ｄは通水穴、■は濾過体、
（至）は支持環、（至）は汚水槽、（荀は自白基、（至
）は固定堰、艷（オーヒ蓋、すＯは下蓋、０１）は通水
筒、（６）１．ｆ係合部である。 代理人　　葛　野　信　− （１υ 第１図　　　　７９ 第４図 ９ 第５図　　　　第す図 ２Figures 1 to 3 show a conventional machining fluid supply device. FIG. 2 is a sectional view taken along the line IJ in FIG. 2; , Figures 4 to 6 are 7'? A machining fluid supply device according to an embodiment of the present invention is shown in FIG. 1. is a supply system diagram of the machining fluid circulation path, FIG. 5 is a side sectional view of the filter section, and FIG. 'r is a sectional view taken along the line MM in FIG. 5; In the figures, the same reference numerals indicate corresponding parts [7
, (1) is the storage tank, (2), (6) is the piping, (4) +
, is the fresh water tank, (7) is the filtration pump, (9) is Fino 1, (E) is the drain valve, 0D is the water hole, ■ is the filter body,
(To) is the support ring, (To) is the sewage tank, (Xun is the confession base, (To) is the fixed weir, (Ohi lid, Su O is the lower lid, 01) is the water pipe, (6) 1.f This is the engaging part. Agent Shin Kuzuno - (1υ Fig. 1 79 Fig. 4 9 Fig. 5 Fig. 2

Claims (1)

【特許請求の範囲】 （１）放電加工の加工部に供給する加工液を貯える清水
槽および加工に供さね、加１金属粉を含有する汚水加工
液が流入される汚水槽からなる貯留槽と、上記汚水槽か
ら濾過ポンプにまって送給さねる汚水加工液の金属粉を
濾過するフィルタと、この金属粉が濾過さね１こ清水加
工液を再び清水槽に返戻するパイプとを有する加工液供
給装置を備えたワイヤカット放電加工装置において、上
記フィルタは加工液を通す通水穴があけらね１こ通水筒
と、この通水筒の局部に設けらね、上記金属粉を沖過才
る沖過体と、この濾過体を着脱自在に挾持する一対の蓋
とからなることを特徴きするワイヤカット放電加工装置
。 （２、特許請求の範囲第１項に記載のワイヤカット放電
加工装置において、通水筒の両端部にはねじ部が設けら
ねるとともに一対の蓋部の上記通水筒との係合部にねじ
部が設けらね、こねが螺合【、て濾過体を挾持すること
を特徴とするワイヤ力、、ト放電加工装置。 （３）特許請求の範囲第１項に記載のワイヤカット放電
加工装置において、汚水槽には、この汚水槽の底部と間
隙を有【７て固設され１こ第１の堰板と、汚水槽の底部
と接する第２の堰板とが設けられていることを特徴とす
るワイヤ力・ント放電加工装置。 （４）特許請求の範囲第２項に記載のワイヤ力・、）放
電加工装置において、第２の堰板１ま汚水槽に対ｔ・て
上方に移動自在に設けらねていることを特徴とするワイ
ヤカット放電加工装置。[Scope of Claims] (1) A storage tank consisting of a fresh water tank that stores machining fluid to be supplied to the machining section of electric discharge machining and a sewage tank into which the sewage machining fluid containing additive metal powder that is not used for machining is flowed. , a filter for filtering metal powder from the waste water processing fluid that is fed from the filtration pump from the sewage tank, and a pipe for returning the clean water processing fluid to the fresh water tank again after the metal powder has been filtered. In a wire-cut electric discharge machining device equipped with a machining fluid supply device, the filter has a water passage tube with a water passage hole through which the machining fluid passes, and a water passage hole is provided in a local part of this water passage tube to allow the metal powder to pass through the surface. A wire-cut electrical discharge machining device comprising a filter body and a pair of lids that detachably hold the filter body. (2. In the wire-cut electrical discharge machining apparatus according to claim 1, the water pipe has no threaded portions at both ends thereof, and a threaded portion is provided at the engaging portion of the pair of lid portions with the water pipe. A wire-cut electric discharge machining apparatus characterized in that a wire force is provided and a screw is screwed together to clamp the filter body. (3) In the wire-cut electric discharge machining apparatus according to claim 1. , the sewage tank is provided with a first dam plate that is fixedly installed with a gap between the sewage tank and the bottom of the sewage tank, and a second dam plate that is in contact with the bottom of the sewage tank. (4) In the wire force/discharge machining apparatus according to claim 2, the second weir plate 1 is moved upward relative to the sewage tank. A wire-cut electrical discharge machining device characterized by being freely installed.