JPH0569234A - Wire electric discharge machining device and method thereof - Google Patents

Abstract

PURPOSE:To provide a wire electric discharge machining device and a wire electric discharge machining method allowing a workpiece even with large plate thickness to be machined with large electric discharge energy so as to enable the improvement of machining efficiency. CONSTITUTION:The bath voltage between a wire 1 and a workpiece 2 is detected, and when the bath voltage becomes the specified value or less, the wire 1 and workpiece 2 are relatively separated along a machining path and then brought close to each other again along the machining path by a retreat control means. In a wire electric discharge machining device having such a retreat control means, there is provided a jump control means 7 for separating the wire 1 and workpiece 2 relatively along the machining path and then bringing both of them close to each other again along the machining path at the preset time interval.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、ワイヤ放電加工装置お
よびワイヤ放電加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire electric discharge machining apparatus and a wire electric discharge machining method.

【０００２】[0002]

【従来の技術】特公昭４８−３７３２０号公報には、図
２に示すように、ワイヤ１とワ−ク２間の電圧すなわち
極間電圧を電圧検出手段３により検出し、両者が短絡し
た場合、ワ−ク２を直交するＸ−Ｙ方向に移動させる移
動手段４により両者を相対的に加工経路に沿って引き離
し、短絡解消後再び両者を加工経路に沿って近づけるよ
うにした、いわゆる後退制御機能を持たせたワイヤ放電
加工装置が開示されている。さらに、ワイヤ１とワ−ク
２を短絡させるとワイヤ１が断線することが多いから、
極間電圧が所定の値以下になったときワ−ク２の移動手
段４により両者を加工経路に沿って相対的に引き離し、
極間電圧が所定の値以上になったとき再び両者を加工経
路に沿って近づけるようにしたワイヤ放電加工装置もあ
る。そして、上記した技術によれば、大きな放電エネル
ギーで加工できるから、加工能率を向上させることがで
きる。そして、ＮＣ装置５は上記した後退制御機能を含
むワイヤ１とワ−ク２の相対的な移動を加工プログラム
に基づき制御する。なお、６はワ−ク２を支持するテ−
ブルである。2. Description of the Related Art In Japanese Patent Publication No. 48-37320, as shown in FIG. 2, the voltage between the wire 1 and the work 2, that is, the voltage between contacts is detected by a voltage detecting means 3 and both are short-circuited. , A so-called retreat control in which the two are relatively separated along the machining path by the moving means 4 for moving the work 2 in the orthogonal X-Y directions so as to bring them closer together along the machining path after the short circuit is resolved. A wire electric discharge machine having a function is disclosed. Furthermore, when the wire 1 and the work 2 are short-circuited, the wire 1 often breaks,
When the voltage between contacts becomes equal to or less than a predetermined value, the moving means 4 of the work 2 relatively separates the two along the machining path,
There is also a wire electric discharge machine in which both are brought closer to each other along the machining path when the voltage between the electrodes reaches a predetermined value or more. Further, according to the above-described technique, machining can be performed with a large discharge energy, so that the machining efficiency can be improved. Then, the NC device 5 controls the relative movement of the wire 1 and the work 2 including the above-mentioned retreat control function based on the machining program. In addition, 6 is a support for supporting the work 2.
Bull.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、ワ−ク
２の板厚が大きくなると、加工部から加工により発生す
るスラッジを排出しきれない場合がある。そしてスラッ
ジが加工部に存在すると、短絡が増加して、ワイヤ１と
ワ−ク２とが１ヵ所で相対的な移動を繰り返すだけで加
工が進まず、能率が上がらない。本願の目的は、上記し
た課題を解決し、ワ−クの板厚が大きい場合でも大きな
放電エネルギーで加工でき、加工能率を向上させること
ができるワイヤ放電加工装置およびワイヤ放電加工方法
を提供することにある。However, if the plate thickness of the work 2 becomes large, the sludge generated by the processing may not be discharged from the processing portion. When the sludge is present in the processing portion, short circuits increase, the wire 1 and the work 2 only repeat relative movement at one location, and the processing does not proceed and the efficiency does not increase. It is an object of the present application to provide a wire electric discharge machining apparatus and a wire electric discharge machining method which solve the above-mentioned problems and can perform machining with a large electric discharge energy even when a work plate has a large thickness and can improve machining efficiency. It is in.

【０００４】[0004]

【課題を解決するための手段】上記した課題は、ワイヤ
とワ−クとの極間電圧を検出し、極間電圧が所定の値以
下になったときワイヤとワ−クを加工経路に沿って相対
的に引き離した後再び両者を加工経路に沿って近づける
という後退制御手段を持つワイヤ放電加工装置におい
て、予め定める時間間隔でワイヤとワ−クを加工経路に
沿って相対的に引き離した後再び両者を加工経路に沿っ
て近づけるジャンプ制御手段を持たせることにより解決
される。The above-mentioned problem is to detect the inter-electrode voltage between the wire and the work, and when the inter-electrode voltage falls below a predetermined value, move the wire and the work along the machining path. In a wire electric discharge machine having a retreat control means for moving the two relatively closer together along the machining path, the wire and the work are relatively separated along the machining path at a predetermined time interval. The problem can be solved by providing a jump control means for bringing the two closer together along the machining path.

【０００５】[0005]

【作用】予め定める時間間隔でワイヤとワ−クとを加工
経路に沿って相対的に引き離すことにより、加工部から
スラッジを容易に排出することができる。 この結果、
ワイヤとワ−クの極間電圧が所定の値以下になる頻度が
低減し、加工能率を向上させることができる。The sludge can be easily discharged from the working part by relatively separating the wire and the work along the working path at predetermined time intervals. As a result,
The frequency with which the inter-electrode voltage between the wire and the work becomes equal to or lower than a predetermined value is reduced, and the working efficiency can be improved.

【０００６】[0006]

【実施例】図１は本発明の一実施例を示す図である。な
お、図２と同じものは同一の符号を付してある。７は予
め定める時間間隔でワイヤ１とワ−ク２とを加工経路に
沿って相対的に引き離した後再び両者を加工経路に沿っ
て近づけるジャンプ制御装置である。８はジャンプ制御
の際ワイヤ１とワ−ク２とを加工経路に沿って相対的に
引き離す距離を設定するための設定器である。９はジャ
ンプ制御を実行させる時間間隔を設定するための設定器
である。１０はジャンプ制御を実行させるかどうかを選
択するための選択スイッチである。ワ−ク１の板厚が大
きい場合、加工に先立って、設定器８によりワイヤ１と
ワ−ク２とを加工経路に沿って相対的に引き離す距離を
例えば０．２ｍｍに、また、設定器９によりジャンプ制
御を実行させる時間間隔を例えば５秒に設定し、選択ス
イッチ１０を入れ、ジャンプ制御装置７とＮＣ装置５と
を接続する。加工時、ワイヤ１とワ−ク２とは５秒ごと
に０．２ｍｍだけ加工経路に沿って相対的に離れた後再
び加工経路に沿って近づくという動作を繰り返す。ま
た、極間電圧が所定の値以下になった場合には、従来と
同様に後退制御を行なう。なお、本実施例においては、
ワイヤ１とワ−ク２とを相対的に引き離す距離を設定器
８により定めるようにしたが、ワイヤ１とワ−ク２とを
相対的に引き離す時間を定めるようにしてもよい。ま
た、相対的に引き離す距離を定めるための設定器８と、
ジャンプ制御の時間間隔を定めるための設定器９を設け
たが、いづれか一方を固定しておき、他方だけを設定す
るようにしてもよい。FIG. 1 is a diagram showing an embodiment of the present invention. The same components as those in FIG. 2 are designated by the same reference numerals. Reference numeral 7 denotes a jump control device that relatively separates the wire 1 and the work 2 along a machining path at a predetermined time interval and then brings them closer together along the machining path. Reference numeral 8 is a setting device for setting a distance for relatively separating the wire 1 and the work 2 along the machining path during the jump control. Reference numeral 9 is a setter for setting a time interval for executing the jump control. Reference numeral 10 is a selection switch for selecting whether to execute jump control. When the plate thickness of the work 1 is large, the distance by which the wire 1 and the work 2 are relatively separated along the processing path by the setting device 8 is set to 0.2 mm, for example, before the processing, and the setting device is set. The time interval for executing the jump control is set to 5 seconds by 9, for example, and the selection switch 10 is turned on to connect the jump control device 7 and the NC device 5. At the time of processing, the wire 1 and the work 2 are repeatedly separated from each other by 0.2 mm every 5 seconds along the processing path and then again approached along the processing path. Further, when the voltage between contacts becomes equal to or less than a predetermined value, the backward control is performed as in the conventional case. In this example,
Although the distance by which the wire 1 and the work 2 are relatively separated is set by the setting device 8, the time by which the wire 1 and the work 2 are relatively separated may be set. In addition, a setter 8 for determining a distance to be relatively separated,
Although the setting device 9 for determining the time interval of the jump control is provided, either one may be fixed and only the other may be set.

【０００７】[0007]

【発明の効果】以上述べたように、本発明によれば、予
め定める時間間隔でワイヤ１とワ−ク２とを相対的に引
き離すことにより、加工部からスラッジを容易に排出す
ることができる。この結果、ワイヤとワ−クの極間電圧
が所定の値以下になる頻度が低減し、大きな放電エネル
ギーで加工ができ、加工能率を向上させることができる
という効果がある。As described above, according to the present invention, the sludge can be easily discharged from the working portion by relatively separating the wire 1 and the work 2 at a predetermined time interval. . As a result, it is possible to reduce the frequency of the voltage between the wire and the work being equal to or less than a predetermined value, perform machining with a large discharge energy, and improve the machining efficiency.

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

【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.

【図２】従来技術を示す図である。FIG. 2 is a diagram showing a conventional technique.

【符号の説明】[Explanation of symbols]

１ ： ワイヤ ２ ： ワ−ク ３ ： 電圧検出手段 ４ ： 移動装置 ５ ： ＮＣ装置 ７ ： ジャンプ制御装置 ８，９ ： 設定器 １０ ： 選択スイッチ 1: Wire 2: Work 3: Voltage detection means 4: Moving device 5: NC device 7: Jump control device 8, 9: Setting device 10: Selection switch

───────────────────────────────────────────────────── フロントページの続き (72)発明者 金子 真一 神奈川県海老名市上今泉2100番地 日立精 工株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Kaneko 2100 Kamiimazumi, Ebina City, Kanagawa Prefecture Hitachi Seiko Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】ワイヤとワ−クとの極間電圧を検出し、極
間電圧が所定の値以下になったときワイヤとワ−クを加
工経路に沿って相対的に引き離した後再び両者を加工経
路に沿って近づけるという後退制御手段を持つワイヤ放
電加工装置において、予め定める時間間隔でワイヤとワ
−クを加工経路に沿って相対的に引き離した後再び両者
を加工経路に沿って近づけるジャンプ制御手段を持たせ
たことを特徴とするワイヤ放電加工装置。1. An inter-electrode voltage between a wire and a work is detected, and when the inter-electrode voltage becomes a predetermined value or less, the wire and the work are relatively separated along a machining path, and then the both are again provided. In a wire electric discharge machine having a retreat control means for bringing the wire and the workpiece closer to each other along the machining path, the wire and the work are relatively separated along the machining path at a predetermined time interval, and then both are brought closer to each other along the machining path. A wire electric discharge machine characterized by having jump control means. 【請求項２】予め定める時間間隔でワイヤとワ−クを加
工経路に沿って引き離した後再び両者を加工経路に沿っ
て近づけることを特徴とするワイヤ放電加工方法。2. A wire electric discharge machining method, characterized in that a wire and a work are separated along a machining path at a predetermined time interval and then both are brought closer to each other along the machining path.