JPH01135423A - Automatic wire feeding device of wire electric discharge machine - Google Patents

Automatic wire feeding device of wire electric discharge machine

Info

Publication number
JPH01135423A
JPH01135423A JP28753187A JP28753187A JPH01135423A JP H01135423 A JPH01135423 A JP H01135423A JP 28753187 A JP28753187 A JP 28753187A JP 28753187 A JP28753187 A JP 28753187A JP H01135423 A JPH01135423 A JP H01135423A
Authority
JP
Japan
Prior art keywords
wire
electrode
workpiece
contact
wire electrode
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
Application number
JP28753187A
Other languages
Japanese (ja)
Inventor
Takeshi Iwasaki
岩崎 健史
Takuji Magara
卓司 真柄
Toshio Suzuki
俊雄 鈴木
Masahiro Yamamoto
政博 山本
Miyuki Gotou
後藤 美由貴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP28753187A priority Critical patent/JPH01135423A/en
Publication of JPH01135423A publication Critical patent/JPH01135423A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To surely insert a wire electrode into a working starting hole by shifting an XY-table when an electrode contact detecting means detects contact, and then by suspending the shift of the XY-table and continuing the feed of the wire when noncontact is detected. CONSTITUTION:In the wire inserting operation, a wire electrode 1 is sent towards a workpiece 2, and at the same time, a working starting hole 3 is cleaned by jetting the working liquid 15 from an upper nozzle 13, and the curled form of the wire electrode 1 is removed, and the wire electrode 1 is supplied towards the working starting hole 3 of the workpiece 2. When the top edge of the wire electrode 1 is not introduced into the working starting hole 3 and contacts the upper surface of the workpiece 3 and is slackened a little, said slackening is detected by an electrode contact detector 31, and the feed of the wire 1 and the injection of the working liquid 15 are suspended. When the top edge of the working electrode 1 is inserted into the working starting hole 3 by shifting an XY-table 34, and non-contact is detected, a controller 32 suspends the shift of the XY-table 34, and the feed of the wire electrode 1 and injection of the working liquid 15 are continued.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、ワイヤ放電加工装置のワイヤ自動供給装置に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an automatic wire feeding device for a wire electrical discharge machining device.

[従来の技術] 第6図に例えば特開昭62−120920号公報に開示
されている従来装置の加工時の状態を概略的に示す。図
中(1)はワイヤ電極、(2)は工作物、(3)は工作
物(2)にあけられたワイヤ電極(1)を通すイニシャ
ルホールであり、工作物(2)は図示されていない別の
駆動装置により、ワイヤ電極(1)に対してX、Y方向
に駆動される。(4)はパイプガイドで、内部にワイヤ
電極(1)を挿通しかつ先端の加工区域にあるワイヤ電
極(1)をガイドするダイスガイド(5)を備えている
。(6)はワイヤ電極(1)をガイドする下側のダイス
ガイドで、下部ガイド(7)の上端に装管されている。
[Prior Art] FIG. 6 schematically shows the state of a conventional apparatus disclosed in, for example, Japanese Patent Laid-Open No. 62-120920 during processing. In the figure, (1) is the wire electrode, (2) is the workpiece, and (3) is the initial hole drilled in the workpiece (2) through which the wire electrode (1) is passed.The workpiece (2) is not shown. The wire electrode (1) is driven in the X and Y directions by a separate drive device. (4) is a pipe guide, which has a die guide (5) through which the wire electrode (1) is inserted and which guides the wire electrode (1) in the processing area at the tip. (6) is a lower die guide for guiding the wire electrode (1), and is connected to the upper end of the lower guide (7).

(8)はワイヤ電極(1)に電源(9)から加工エネル
ギーを供給する給電子である。(10)はパイプガイド
(4)を位置決めする固定弐基桑ブロック、(11)は
バネの押圧力によりパイプガイド(4)を位置決めする
可動ブロック、(12)は下部ガイド(7)に装着され
た下側の給電子である。(13)、(14)はワイヤ電
極(1)と工作物(2)との放電加工区域に加工液(1
5)を噴出する上部及び下部のノズル、(1G)はパイ
プガイド(4)を案内する軸受である。
(8) is a power feeder that supplies machining energy to the wire electrode (1) from a power source (9). (10) is a fixed double block that positions the pipe guide (4), (11) is a movable block that positions the pipe guide (4) by the pressure of a spring, and (12) is attached to the lower guide (7). This is the lower power feeder. (13) and (14) are machining fluid (1) in the electrical discharge machining area between the wire electrode (1) and the workpiece (2).
5) upper and lower nozzles that eject water; (1G) is a bearing that guides the pipe guide (4);

(17) 、 (1g)はノズル(13)、(14)に
加工液(15)を供給する加工液流入口である。(19
)はパイプガイド(4)を通って下部ガイド(7)へワ
イヤ電極(1)を供給するピンチローラ−で、パイプガ
イド(4)の上部に取付けられ、駆動モーター(20)
によってワイヤ電極(1)を下方向へ駆動する。(21
)はパイプガイド(4)を送りネジ(22)及びスライ
ダー(23)により案内棒(24)に沿って上、下方向
に移動させるモータで、パイプガイド(4)の上下移動
によってワイヤ電極(1)の下部ガイド(7)へのワイ
ヤ挿通を容易にしている。(25)はワイヤ電極(1)
を切断するカッターで、パイプガイド(4)がモーター
(21)によってカッター(25)上部まで持ち上げら
れた後、ワイヤ電極(1)を切断するものである。
(17) and (1g) are machining fluid inlets that supply the machining fluid (15) to the nozzles (13) and (14). (19
) is a pinch roller that supplies the wire electrode (1) through the pipe guide (4) to the lower guide (7), which is attached to the upper part of the pipe guide (4) and is connected to the drive motor (20).
The wire electrode (1) is driven downward by. (21
) is a motor that moves the pipe guide (4) upward and downward along the guide rod (24) using a feed screw (22) and a slider (23), and by moving the pipe guide (4) up and down, the wire electrode (1 ) facilitates wire insertion into the lower guide (7). (25) is wire electrode (1)
This cutter cuts the wire electrode (1) after the pipe guide (4) is lifted to the top of the cutter (25) by the motor (21).

(26)は下部ガイド(7)まで供給されたワイヤ電極
(1)を引張駆動させるローラーで、ベルト(27)が
張架されたローラー(28)と、このローラー(28)
に接続されたモータ(29)とによってワイヤ電極回収
箱(30)へワイヤ電極(1)を送り出す構造となって
いる。また、(31)はパイプガイド(4)と工作物(
2)の接触を検出する検出装置、(32)は制御装置で
ある。
(26) is a roller that tensions and drives the wire electrode (1) supplied to the lower guide (7), and includes a roller (28) on which a belt (27) is stretched, and this roller (28).
The wire electrode (1) is sent out to the wire electrode collection box (30) by a motor (29) connected to the wire electrode collection box (30). (31) is the pipe guide (4) and the workpiece (
2) is a detection device that detects contact, and (32) is a control device.

第7図は上記従来装置のワイヤ電極(1)を下部ガイド
(7)に送給するときの動作を示したもので、パイプガ
イド(4)が駆動モータ(21)によってイニシャルホ
ール(3)へ下降して工作物(2)の端面に接触し、パ
イプガイド(4)と工作物(2)の導通を接触検出回路
(31)が検出し、この検出信号により制御装置(32
)はパイプガイド(4)を駆動するモータ(21)を停
止させ、同時にワイヤ送りモータ(20)を駆動してピ
ンチローラ−(19)を回転し、ワイヤ電W (1)を
送り出す。ワイヤ電極(1)は加工開始孔(3)、下部
ガイド(7)を順に通過しローラー(26)で捕捉され
ベルト(27)で運ばれて回収箱(30)へ回収される
Figure 7 shows the operation of the above conventional device when feeding the wire electrode (1) to the lower guide (7), in which the pipe guide (4) is moved to the initial hole (3) by the drive motor (21). The contact detection circuit (31) detects continuity between the pipe guide (4) and the workpiece (2) by descending and contacting the end surface of the workpiece (2), and this detection signal causes the control device (32
) stops the motor (21) that drives the pipe guide (4), and simultaneously drives the wire feed motor (20) to rotate the pinch roller (19) and send out the wire wire W (1). The wire electrode (1) sequentially passes through the processing start hole (3) and the lower guide (7), is caught by a roller (26), is carried by a belt (27), and is collected into a collection box (30).

第8図は上記従来装置におけるワイヤ電極(1)を切断
するときの動作を示したもので、パイプガイド(4)は
カッター(25)の上部まで引き上げられ、カッター(
25)が図示されていない別の駆動源によって図の矢印
方向に駆動され、ワイヤ電極(1)を切断する。
FIG. 8 shows the operation of cutting the wire electrode (1) in the conventional device, in which the pipe guide (4) is pulled up to the top of the cutter (25), and the cutter (
25) is driven in the direction of the arrow in the figure by another drive source (not shown) to cut the wire electrode (1).

[発明が解決しようとする問題点1 以上の従来装置において、特に小径の加工開始孔へのワ
イヤ自動供給の際(例えばワイヤ電極径0 、2m11
加工開始孔径0.5+nm程度)、工作物上の加工開始
孔が所定の位置からづれて明けられている場合、第9図
に示すようにワイヤ電極(1)の先端か加工開始孔に挿
通されず、ワイヤ自動供給動作か不能となる。また同様
に、第1O図に示すようにカッター(25)で切断され
たワイヤ電極(1)のダイスガイド(5)から先端まで
の部分が、ワイヤ電極の巻きぐせ等によりバイブガイド
の中心線上からそれるため、挿通ができない場合もワイ
ヤ自動供給動作が不能となる。
[Problem to be Solved by the Invention 1] In the conventional device described above, especially when automatically feeding a wire to a small-diameter machining start hole (for example, when the wire electrode diameter is 0, 2m11
If the machining start hole on the workpiece is opened out of position, the tip of the wire electrode (1) may not be inserted into the machining start hole, as shown in Figure 9. , automatic wire feeding becomes impossible. Similarly, as shown in Figure 1O, the portion of the wire electrode (1) cut by the cutter (25) from the die guide (5) to the tip may be removed from the center line of the vibrator guide due to curling of the wire electrode, etc. Therefore, even if the wire cannot be inserted, automatic wire feeding operation becomes impossible.

以上のように、従来装置では、ワイヤ電極と加工開始孔
の相対的位置ずれのため、加工開始孔が小さくなると、
ワイヤ自動供給動作の成功率が著しく低下する欠点を有
していた。
As described above, in the conventional device, due to the relative positional deviation between the wire electrode and the machining start hole, when the machining start hole becomes smaller,
This method has the disadvantage that the success rate of automatic wire feeding operation is significantly reduced.

本発明は前述の従来の問題点に鑑み為されたものであり
、その目的は小径の加工開始穴に対してもワイヤ電極と
加工開始穴の相対的位置ずれにかかわりなく、信頼性の
高いワイヤ自動供給動作を可能とし、しかも従来はワイ
ヤ自動供給動作の成功率が極めて低いため実用に供され
なかったφ11IIII以下の加工開始穴でもワイヤ自
動供給動作を実用可能とできるワイヤ放電加工装置のワ
イヤ自動供給装置を提供することにある。
The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a highly reliable wire even for small-diameter machining start holes, regardless of the relative positional deviation between the wire electrode and the machining start hole. Wire automatic wire electrical discharge machining equipment that enables automatic wire feeding operation, and also enables practical wire automatic feeding operation even for machining start holes of φ11III or less, which was previously not practical because the success rate of automatic wire feeding operation was extremely low. The purpose is to provide a supply device.

[問題点を解決するための手段] 本発明に係るワイヤ放電加工装置のワイヤ自動供給装置
は、ワイヤ電極を工作物側へ送り出すワイヤ送給機構と
、送り出されたワイヤ電極が工作物に接触したか否かを
検出する電極接触検出手段と、電極接触検出手段のワイ
ヤmhと工作物の接触を知らせる出力信号を受けてワイ
ヤ送給を停止させ、その停止後に電極接触検出手段のワ
イヤ電極と工作物の非接触を知らせる出力信号を受けて
ワイヤ送給を続行させるようワイヤ送給機構を制御する
ワイヤ送給制御手段と、ワイヤ送給が停止させられた状
態で電極接触検出手段のワイヤ電極と工作物の接触を知
らせる出力信号を受けたときにXY子テーブル移動させ
るテーブル駆動機構を動作させ、その動作中に電極接触
検出手段からのワイヤ電極と工作物の非接触を知らせる
出力信号を受けたら、XY子テーブル移動を停止させる
ようテーブル駆動機構を制御するテーブル位置制御手段
とを備えるように構成したものである。
[Means for Solving the Problems] The automatic wire feeding device of the wire electrical discharge machining apparatus according to the present invention includes a wire feeding mechanism that sends out a wire electrode to the workpiece side, and a wire feeding mechanism that sends out the wire electrode to the workpiece side. an electrode contact detection means for detecting whether or not the wire mh of the electrode contact detection means is in contact with the workpiece; and receiving an output signal indicating that the wire mh of the electrode contact detection means has contacted the workpiece, stops wire feeding, and after the stop, the wire electrode of the electrode contact detection means and the workpiece A wire feeding control means for controlling a wire feeding mechanism to continue feeding the wire upon receiving an output signal indicating non-contact with an object, and a wire electrode of an electrode contact detection means in a state where the wire feeding is stopped. When an output signal indicating contact with the workpiece is received, the table drive mechanism for moving the XY child table is operated, and during the operation, when an output signal indicating non-contact between the wire electrode and the workpiece is received from the electrode contact detection means. , and table position control means for controlling the table drive mechanism to stop the movement of the XY child table.

更に、もう一つの発明に係るワイヤ放電加工装置のワイ
ヤ自動供給装置は上述した発明の構成にワイヤ送給と共
にワイヤ送り方向に向けて加工液をジェット噴出し、電
極接触検出手段のワイヤ電極と工作物の接触を知らせる
出力信号を受けて加工液のジェット噴出を停止させ、そ
の停止後に、電極接触検出手段のワイヤ電極と工作物の
非接触を知らせる出力信号を受けて加工液のジェット噴
出を続行させるように制御する加工液供給制御手段とを
備えるように構成したものである。
Furthermore, an automatic wire feeding device for a wire electrical discharge machining apparatus according to another invention has the structure of the invention described above, and jets machining fluid in the wire feeding direction at the same time as wire feeding, so that the wire electrode of the electrode contact detection means and the machining The jet of machining fluid is stopped in response to an output signal that indicates contact with an object, and after that stop, the jet of machining fluid is continued in response to an output signal that indicates non-contact between the wire electrode of the electrode contact detection means and the workpiece. and processing fluid supply control means for controlling the processing fluid to

[作用] この発明においては、ワイヤ送給機構によってワイヤ電
極がXY子テーブル上工作物に向けて送り出され、ワイ
ヤ電極が工作物の加工開始孔に挿入されずに工作物と接
触すると、この接触を電極接触検出手段が検出し、その
出力信号を受けたワイヤ送給制御手段はワイヤ送給機構
を制御してワイヤ電極のワイヤ送給を停止させる。それ
と同時に電極接触検出手段の出力信号を受けたテーブル
位置制御手段はテーブル駆動機構を制御してXY子テー
ブル移動させ、ワイヤ電極と加工開始孔との相対運動に
よってワイヤ電極の先端が加工開始孔中に位置すると、
電極接触検出手段はワイヤ電極と工作物の非接触を知ら
せる出力信号を出力する。その出力信号を受けたテーブ
ル位置制御手段はテーブル駆動機構を制御してXY子テ
ーブル移動を停止させる。また、その出力信号を受けた
ワイヤ送給制御手段はワイヤ送給機構を制御してワイヤ
電極のワイヤ送給を続行させ、ワイヤ電極の加工開始孔
への挿通が完了する。更に、ワイヤ送給時には加工液供
給制御手段によりワイヤ送り方向に向けて加工液がジェ
ット噴出され、加工開始孔を洗浄するとともにワイヤ電
極に送給方向に対して張力を与える。
[Operation] In this invention, when the wire electrode is sent out toward the workpiece on the XY child table by the wire feeding mechanism and comes into contact with the workpiece without being inserted into the machining start hole of the workpiece, this contact The electrode contact detection means detects this, and the wire feeding control means that receives the output signal controls the wire feeding mechanism to stop the wire feeding of the wire electrode. At the same time, the table position control means that receives the output signal from the electrode contact detection means controls the table drive mechanism to move the XY child table, and the relative movement between the wire electrode and the machining start hole causes the tip of the wire electrode to enter the machining start hole. If you are located at
The electrode contact detection means outputs an output signal indicating that the wire electrode is not in contact with the workpiece. The table position control means receiving the output signal controls the table drive mechanism to stop the movement of the XY child table. Further, the wire feeding control means receiving the output signal controls the wire feeding mechanism to continue feeding the wire electrode, and the insertion of the wire electrode into the processing start hole is completed. Further, when the wire is fed, the machining liquid is jetted out in the wire feeding direction by the machining liquid supply control means to clean the machining start hole and apply tension to the wire electrode in the feeding direction.

[実施例] 第1図は本発明の一実施例を示す構成図、第2図は電極
接触検出装置を示す回路図である。図において従来例と
同−又は相当部分には同一符号を付して説明を省略する
[Embodiment] FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an electrode contact detection device. In the figures, the same or equivalent parts as in the conventional example are given the same reference numerals, and the explanation thereof will be omitted.

第1図において、(19)はワイヤ送給ローラ、(20
)はワイヤ送給モータ、(31)はワイヤ電極(1)と
工作物(2)の接触か否かを検出する電極接触検出装置
である。この電極接触検出装置(31)は第2図に示す
ように、ワイヤ電極(1)と工作物(2)に印加されて
いる直流電源(37)からの極間電圧E。
In FIG. 1, (19) is a wire feeding roller, (20
) is a wire feeding motor, and (31) is an electrode contact detection device that detects whether or not there is contact between the wire electrode (1) and the workpiece (2). As shown in FIG. 2, this electrode contact detection device (31) detects the inter-electrode voltage E from the DC power source (37) that is applied to the wire electrode (1) and the workpiece (2).

と比較電源(38)からの比較電圧E とをコンパレ−
タ(39)で比較し、ワイヤ電極(1)が工作物(2)
に接触して極間電圧E が低下して比較電圧E。
and the comparison voltage E from the comparison power supply (38).
(39), the wire electrode (1) is the workpiece (2).
The interelectrode voltage E decreases to the comparison voltage E.

以下となったとき、コンパレータ(39)から接触検出
信号が得られるように構成されている。ワイヤ電極(1
)は給電ダイス(8)、パイプガイド(4)を通じて電
極接触検出装置(31)と導通している。
The configuration is such that a contact detection signal is obtained from the comparator (39) when the following conditions occur. Wire electrode (1
) is electrically connected to the electrode contact detection device (31) through the power supply die (8) and the pipe guide (4).

(32a)は制御装置(32)に付設されたワイヤ送給
制御手段で、電極接触検出手段(31)の信号を受けて
ワイヤ送給機構であるワイヤ送りの駆動モータ(20)
を制御する。(32b)は制御装置(32)に付設され
た加工液供給制御手段で、ワイヤ電極(1)のワイヤ送
り方向に向けて加工液(15)をジェット噴射する制御
を行う。(32c)は制御装置(32)に付設されたテ
ーブル位置制御手段で、X軸駆動モータ(35)及びY
軸駆動モータ(3B)を動作させてXYクロステーブル
(36)を移動させ、ワイヤ電極(1)と加工開始孔(
3)の相対運動を制御する。
(32a) is a wire feeding control means attached to the control device (32), which receives a signal from the electrode contact detection means (31) and drives a wire feeding drive motor (20) which is a wire feeding mechanism.
control. (32b) is a machining liquid supply control means attached to the control device (32), which controls jetting of the machining liquid (15) toward the wire feeding direction of the wire electrode (1). (32c) is table position control means attached to the control device (32), which includes an X-axis drive motor (35) and a Y-axis drive motor (35).
The axis drive motor (3B) is operated to move the XY cross table (36), and the wire electrode (1) and the machining start hole (
3) Control the relative movement.

次に、本実施例の動作について、第3図乃至第5図を参
照しながら説明する。第3図はワイヤ送給制御の手順を
示すフローチャート、第4図(a)乃至(d)はワイヤ
電極の状態及び動きの一例をそれぞれ示す説明図、第5
図(a)乃至(e)はワイヤ電極と工作物のt0対運動
の軌跡の一例をそれぞれ示す説明図である。
Next, the operation of this embodiment will be explained with reference to FIGS. 3 to 5. 3 is a flowchart showing the procedure of wire feeding control, FIGS. 4(a) to 4(d) are explanatory diagrams showing examples of the state and movement of the wire electrode, and FIG.
Figures (a) to (e) are explanatory diagrams each showing an example of the trajectory of the movement of the wire electrode and the workpiece versus t0.

第1図において、ワイヤ挿入動作はます、ワイヤ送給機
構であるピンチローラ(19)を駆動する駆動モータ(
20)を回転させ(ステップ4Q)、ワイヤ電極(1)
を工作物(2)の方向へ送り出すことにより、ワイヤ送
給を開始する。それと同時に上部ノズル(I3)により
加工液(I5)をワイヤ電極(1)の送り方向に向けて
ジェット噴射する(ステップ41)。
In Figure 1, the wire insertion operation is performed by the drive motor (19) that drives the pinch roller (19), which is the wire feeding mechanism.
20) (step 4Q), and wire electrode (1)
Wire feeding is started by feeding the wire in the direction of the workpiece (2). At the same time, the upper nozzle (I3) jets the machining liquid (I5) in the feeding direction of the wire electrode (1) (step 41).

このジェット噴出により、加工開始孔(3)が洗浄され
てつまりが除かれると共にワイヤ電極(1)に送給方向
に対して張力を与えて巻きぐせが取り除かれる。ワイヤ
電極(1)が工作物(2)の方向に移動して、ワイヤ電
極(1)の先端が工作物(2)の加工開始孔(3)の中
へ入らず、工作物(2)の上面に接触すると、電極接触
検出装置(31)がその接触を検出し、ワイヤ電極(1
)と工作物(2)の接触を知らせる出力信号が出力され
(ステップ42)、ワイヤ送給制御手段(32a)と加
工液供給制御手段(32b)に伝達される。ワイヤ送給
制御手段(32a)では遅延手段によって一定時間経過
後に駆動モータ(20)の回転を停止させるよう制御し
てワイヤ電極(1)のワイヤ送給を停止させ、加工液供
給制御手段<32b)では上部ノズル(13)よりの加
工液(I5)のジェット噴射を停止させる(ステップ4
3.44 )。
This jet blast cleans the machining start hole (3) and removes blockages, and also applies tension to the wire electrode (1) in the feeding direction to remove curls. The wire electrode (1) moves in the direction of the workpiece (2), and the tip of the wire electrode (1) does not enter the machining start hole (3) of the workpiece (2). When it comes into contact with the top surface, the electrode contact detection device (31) detects the contact and the wire electrode (1
) and the workpiece (2) is output (step 42), and is transmitted to the wire feed control means (32a) and the machining fluid supply control means (32b). The wire feed control means (32a) controls the drive motor (20) to stop rotating after a certain period of time by the delay means to stop the wire feed of the wire electrode (1), and the machining fluid supply control means <32b ), the jet injection of the machining fluid (I5) from the upper nozzle (13) is stopped (step 4).
3.44).

第4図(a)はワイヤ電極(1)の送給を停止した状態
を示したもので、ワイヤ送給停止までの一定時間経過後
ち遅延時間により、ワイヤ電極(1)に若干のたわみ量
が存在しており、適当なたわみ量を設定することは、以
下に説明するワイヤ電極(1)の挿入動作を確実にする
ために必要である。本発明者の実験によれば、バイブガ
イド(4)と工作物(2)の間隙を8mmとした場合、
たわみ量は0.5〜1 、0mm程度が最適であること
が判っている。
Figure 4(a) shows a state in which feeding of the wire electrode (1) is stopped, and the wire electrode (1) is slightly deflected due to the delay time after a certain period of time has elapsed until the feeding of the wire is stopped. exists, and setting an appropriate amount of deflection is necessary to ensure the insertion operation of the wire electrode (1), which will be described below. According to the inventor's experiments, when the gap between the vibrator guide (4) and the workpiece (2) is 8 mm,
It has been found that the optimum amount of deflection is about 0.5 to 1.0 mm.

次に、ワイヤ電極(1)の送給を停止した後は、電極接
触検出装置(31)よりワイヤ電極(1)と工作物(2
)の接触を知らせる出力信号を受けたテーブル位置制御
手段(32c)はテーブル駆動機構であるX軸駆動モー
タ(35)或いはY軸駆動モータ(36)又はその両者
を駆動制御してXYクロステーブル(34)を第4図(
a)乃至(d)に示すように移動させ(ステップ45)
、ワイヤ電極(1)と加工開始孔(3)とをトl対運動
させる。第4図(a)はワイヤ電極(1,)の先端が加
工開始孔(3)の図上右側に接触して送給が停止された
状態を示しており、第4図(b) 、 (c)に示すよ
うに図の左右方向に相対運動を行わせれば、ワイヤ電極
(1)の先端も工作物(2)の上面に接しながら左右に
移動するため、第4図(d)に示すように必ず加工開始
孔(3)の中に挿入されることになる。よって、相対運
動する移動範囲はワイヤ電極(1)の先端が相対運動に
よって再び加工開始孔(3)の外に引きづり出されるの
を避けるため、ある一定の範囲に制限される。本発明者
の実験によれば、パイプガイド(4)の中心線と加工開
始孔(3)の中心線が2.0in+以上離れない範囲に
限定すれば良い事が判っている。また、ワイヤ電極(1
)が加工開始孔(3)の外周にあってどの方向で接触し
送給停止となってもワイヤ電極(1)の挿入動作を可能
とするためには例えば第5図(a)に示したように適当
に各方向に移動する軌跡をワイヤ電極(1)の先端が取
るようにするが、8方向以上を取れば確実にワイヤ電極
(1)は加工開始孔(3)に挿通される。なお、軌跡の
取り方は第5図(a)に示した以外に第5図(b)又は
(C)に示す軌跡をはじめとしてその取り方は無数にあ
る。
Next, after stopping the feeding of the wire electrode (1), the wire electrode (1) and the workpiece (2) are detected by the electrode contact detection device (31).
The table position control means (32c), which receives an output signal notifying the contact of the 34) in Figure 4 (
Move as shown in a) to (d) (step 45)
, the wire electrode (1) and the machining start hole (3) are moved in pairs. Fig. 4(a) shows a state in which the tip of the wire electrode (1,) comes into contact with the right side of the machining start hole (3) in the drawing, and feeding is stopped, and Fig. 4(b), ( If the relative movement is performed in the left and right directions in the figure as shown in c), the tip of the wire electrode (1) will also move left and right while contacting the top surface of the workpiece (2), as shown in Figure 4 (d). Therefore, it must be inserted into the machining start hole (3). Therefore, the relative movement range is limited to a certain range in order to prevent the tip of the wire electrode (1) from being pulled out of the machining start hole (3) again due to the relative movement. According to experiments conducted by the inventor, it has been found that the distance between the center line of the pipe guide (4) and the center line of the machining start hole (3) should be limited to no more than 2.0 inches. In addition, a wire electrode (1
) is located on the outer periphery of the machining start hole (3), and in order to make it possible to insert the wire electrode (1) even if it contacts in any direction and the feeding is stopped, the wire electrode (1) can be inserted as shown in FIG. 5(a), for example. The tip of the wire electrode (1) is made to take an appropriate trajectory of movement in each direction as shown in FIG. There are countless ways to take the trajectory, including the trajectory shown in FIG. 5(b) or (C) in addition to the one shown in FIG. 5(a).

以上のように、ワイヤ電極(1)の先端が加工開始孔(
3)の中に確実に挿入される位置になると、電極接触検
出装置(31)はワイヤ電極(1)と工作物(2)の非
接触を知らせる信号を出力する(ステップ46)。その
出力信号を受けたテーブル位置制御手段(32c)はX
軸駆動モータ(35)、Y軸駆動モータ(36)を停止
制御してXYクロステーブル(34)を停止させる。ま
た、その出力信号を受けたワイヤ送給制御手段(32a
)は駆動モータ(20)を駆動制御してワイヤ電極(1
)のワイヤ送給を続行させ、それと同時に同じく上記出
力信号を受けた加工液供給制御手段(32b)は上部ノ
ズル(13)より加工液(15)のジェット噴射を続行
させる(ステップ47)。
As described above, the tip of the wire electrode (1) is located at the machining start hole (
3), the electrode contact detection device (31) outputs a signal indicating non-contact between the wire electrode (1) and the workpiece (2) (step 46). The table position control means (32c) receiving the output signal
The XY cross table (34) is stopped by controlling the axis drive motor (35) and the Y-axis drive motor (36) to stop. The wire feeding control means (32a) receives the output signal.
) drives and controls the drive motor (20) to connect the wire electrode (1
) continues the wire feeding, and at the same time, the machining liquid supply control means (32b) which also receives the above output signal continues jet injection of the machining liquid (15) from the upper nozzle (13) (step 47).

ワイヤ送給が続行されたワイヤ電極(1)は加工開始孔
(3)、下部ガイド(7)を順に通過し、ローラ(26
)で捕捉案内され、ベルト(27)で運ばれて回収箱(
30)へ回収され、ワイヤ挿入動作は完了する(ステッ
プ48)。
The wire electrode (1), which continues to be fed, passes through the processing start hole (3) and the lower guide (7) in order, and then passes through the roller (26).
) is captured and guided by the belt (27) and transported to the collection box (
30), and the wire insertion operation is completed (step 48).

また、ワイヤ自動供給動作を開始し、ワイヤ電極(1)
が工作物(2)に送り出されたとき、加工開始孔(3)
へ初めから挿入された場合は、電極接触検出装置(31
)によってワイヤ電極(1)と工作物(2)との接触が
検出されない限り、ワイヤ自動供給動作は続行されるが
、ワイヤ電極(1)と加工開始孔(3)の内面で接触が
生じた場合には、前述と同様の動作手順でワイヤ電極(
1)と加工開始孔(3)の相対運動を行い、その後同様
にワイヤ自動供給動作か継続される。
Also, the automatic wire feeding operation starts, and the wire electrode (1)
is sent to the workpiece (2), the machining start hole (3)
If it is inserted from the beginning, the electrode contact detection device (31
) detects contact between the wire electrode (1) and the workpiece (2), the automatic wire feeding operation continues, but if contact occurs between the wire electrode (1) and the inner surface of the machining start hole (3) If the wire electrode (
1) and the processing start hole (3) are moved relative to each other, and then the automatic wire feeding operation is continued in the same manner.

なお、上記実施例ではワイヤ電極(1)と工作物(2)
の相対運動はXYクロステーブル(34)を動かして行
っているが、公知のテーバ加工装置を動かすようにしも
良い。また、ワイヤ送給機構がピンチローラ(19)の
場合を説明したが、平ベルト等のその他の送り装置であ
っても良いことは勿論である。更に、ワイヤ送給制御手
段(32a)はワイヤ電極(1)の先端が工作物(2)
の表面に到達する距離に基づき、一定時間ワイヤ送り用
の駆動モータ(20〉を回転させた後に、電極接触検出
装置(31)でワイヤ電極(1)と工作物(2)の有無
を検出して一担停止とするように制御しても良いことは
勿論である。
In addition, in the above embodiment, the wire electrode (1) and the workpiece (2)
Although the relative movement is performed by moving the XY cross table (34), it is also possible to move a known taber processing device. Moreover, although the case where the wire feeding mechanism is a pinch roller (19) has been described, it goes without saying that other feeding devices such as a flat belt may be used. Further, the wire feeding control means (32a) is arranged such that the tip of the wire electrode (1) is connected to the workpiece (2).
After rotating the wire feeding drive motor (20) for a certain period of time based on the distance reached to the surface of the wire, the electrode contact detection device (31) detects the presence or absence of the wire electrode (1) and the workpiece (2). Of course, it is also possible to perform control such that the load is stopped once.

[発明の効果] 本発明は以上説明したとおり、ワイヤ送給機構によって
ワイヤ電極がXY子テーブル上工作物に向けて送り出さ
れ、ワイヤ電極が工作物と接触したときに電極接触検出
手段がその接触を検出して出力信号を出力し、ワイヤ送
給制御手段はその出力信号を受けてワイヤ送給機構を制
御してワイヤ送給を停止させ、それと同時に電極接触検
出手段の前記出力信号を受けたテーブル位置制御手段は
テーブル駆動機構を制御してXY子テーブル移動させ、
ワイヤ電極と加工開始孔との相対運動によってワイヤ電
極の先端が加工開始孔中に位置したときに、電極接触検
出手段がその非接触を検出して出力信号を出力し、その
出力信号を受けたテーブル位置制御手段はテーブル駆動
機構を制御してXY子テーブル移動を停止させ、またそ
の出力信号を受けたワイヤ送給制御手段はワイヤ送給機
構を制御してワイヤ送給を続行させ、ワイヤ電極の加工
開始孔への挿通を完了するようにしたので、ワイヤ電極
の巻きぐせ等のため従来のワイヤ放電加工装置のワイヤ
自動供給装置では挿通不能となる場合でもワイヤ電極の
先端を加工開始孔に確実に挿通することができ、特に小
径の加工開始孔へのワイヤ自動供給動作の信頼性を著し
く向上させ、従来困難とされていたφ1ff111以下
の加工開始孔の適用も可能とする効果がある。
[Effects of the Invention] As explained above, in the present invention, the wire feeding mechanism feeds the wire electrode toward the workpiece on the XY child table, and when the wire electrode comes into contact with the workpiece, the electrode contact detection means detects the contact. The wire feeding control means receives the output signal and controls the wire feeding mechanism to stop the wire feeding, and at the same time receives the output signal of the electrode contact detection means. The table position control means controls the table drive mechanism to move the XY child table;
When the tip of the wire electrode is located in the machining start hole due to relative movement between the wire electrode and the machining start hole, the electrode contact detection means detects the non-contact and outputs an output signal, and receives the output signal. The table position control means controls the table drive mechanism to stop the movement of the XY child table, and the wire feed control means that receives the output signal controls the wire feed mechanism to continue feeding the wire, and the wire electrode Since the insertion into the machining start hole is completed, even if the automatic wire feeding device of a conventional wire electric discharge machining machine cannot insert the wire due to curling of the wire electrode, etc., the tip of the wire electrode can be inserted into the machining start hole. The wire can be inserted reliably, and the reliability of the automatic wire feeding operation especially to small-diameter machining start holes is significantly improved, and it is also possible to apply the wire to machining start holes of φ1ff111 or less, which has been considered difficult in the past.

更に、ワイヤ送給時には加工液供給制御手段によりワイ
ヤ送り方向に向けて加工液がジェット噴出され、ワイヤ
電極が工作物と接触したときに、電極接触検出手段の出
力信号を受けて加工液供給制御手段は加工液のジェット
噴出が停止されるようにしたので、ワイヤ電極の先端が
加工開始孔に挿入されるまでに加工開始孔が洗浄されて
つまりが除かれると共にワイヤ電極に送給方向に対して
も張力を与え巻きぐせが取り除かれることによってワイ
ヤ電極の先端を加工開始孔により一層確実に挿通するこ
とができるという効果がある。
Furthermore, when feeding the wire, the machining fluid supply control means jets the machining fluid in the wire feeding direction, and when the wire electrode comes into contact with the workpiece, the machining fluid supply is controlled in response to an output signal from the electrode contact detection means. The means is such that the jetting of the machining fluid is stopped, so that the machining start hole is cleaned and unclogged before the tip of the wire electrode is inserted into the machining start hole, and the wire electrode is flushed in the feeding direction. However, by applying tension and removing curling curls, the tip of the wire electrode can be inserted more reliably into the processing start hole.

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

第1図は本発明の一実施例を示す構成図、第2図は電極
接触検出装置を示す回路図、第3図はワイヤ送給制御の
手順を示すフローチャート、第4図(a)乃至(d)は
ワイヤ電極及び動きの一例をそれぞれ示す説明図、第5
図(a)乃至(e)はワイヤ電極と工作物の相対運動の
軌跡の一例をそれ゛ぞれ示す説明図、第6図は従来のワ
イヤ放電加工装置のワイヤ自動供給装置を概略的に示す
構成図、第7図は同装置のワイヤ電極送給動作を概略的
に示す構成図、第8図は同装置のワイヤ電極の切断動作
を示す構成図、第9図及び第10図は同装置のワイヤ電
極送給時のワイヤ電極の状態をそれぞれ示す断面図であ
る。 図において、(1)はワイヤ電極、(2)は工作物、(
3)は加工開始孔、(20)は駆動モータ(ワイヤ送給
機構) 、(:H)は電極接触検出装置、(32)は制
御装置、(32a)はワイヤ送給制御手段、(32b)
は加工液供給制御手段、(32c)はテーブル位置制御
手段、(34)はXYクロステーブル、(35)はX軸
駆動モータ(テーブル駆動機構) 、(2B)はY軸駆
動モータ(テーブル駆動機構)である。 なお各図中、同一符号は同−又は相当部分を示す。
Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an electrode contact detection device, Fig. 3 is a flow chart showing the procedure of wire feeding control, and Figs. 4 (a) to ( d) is an explanatory diagram showing an example of the wire electrode and its movement, 5th
Figures (a) to (e) are explanatory diagrams each showing an example of the locus of relative motion between the wire electrode and the workpiece, and Figure 6 schematically shows a wire automatic feeding device of a conventional wire electrical discharge machining machine. 7 is a block diagram schematically showing the wire electrode feeding operation of the same device, FIG. 8 is a block diagram showing the wire electrode cutting operation of the same device, and FIGS. 9 and 10 are the same device. FIG. 3 is a cross-sectional view showing the state of the wire electrode when feeding the wire electrode. In the figure, (1) is a wire electrode, (2) is a workpiece, (
3) is a processing start hole, (20) is a drive motor (wire feeding mechanism), (:H) is an electrode contact detection device, (32) is a control device, (32a) is a wire feeding control means, (32b)
(32c) is the machining fluid supply control means, (32c) is the table position control means, (34) is the XY cross table, (35) is the X-axis drive motor (table drive mechanism), (2B) is the Y-axis drive motor (table drive mechanism) ). In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

【特許請求の範囲】[Claims] (1)ワイヤ電極を自動的にXYテーブル上の工作物に
供給するワイヤ放電加工装置のワイヤ自動供給装置にお
いて、ワイヤ電極を工作物側へ送り出すワイヤ送給機構
と、送り出されたワイヤ電極が工作物に接触したか否か
を検出する電極接触検出手段と、電極接触検出手段のワ
イヤ電極と工作物の接触を知らせる出力信号を受けてワ
イヤ送給を停止させ、その停止後に電極接触検出手段の
ワイヤ電極と工作物の非接触を知らせる出力信号を受け
てワイヤ送給を続行させるようワイヤ送給機構を制御す
るワイヤ送給制御手段と、ワイヤ送給が停止させられた
状態で電極接触検出手段のワイヤ電極と工作物の接触を
知らせる出力信号を受けたときにXYテーブルを移動さ
せるテーブル駆動機構を動作させ、その動作中に電極接
触検出手段からのワイヤ電極と工作物の非接触を知らせ
る出力信号を受けたらXYテーブルの移動を停止させる
ようテーブル駆動機構を制御するテーブル位置制御手段
とを備えてなることを特徴とするワイヤ放電加工装置の
ワイヤ自動供給装置。
(1) In the automatic wire feeding device of wire electrical discharge machining equipment that automatically feeds the wire electrode to the workpiece on the An electrode contact detection means detects whether or not the wire has come into contact with an object, and the wire feeding is stopped in response to an output signal indicating contact between the wire electrode of the electrode contact detection means and the workpiece, and after the wire feeding is stopped, the electrode contact detection means detects contact with an object. Wire feeding control means for controlling the wire feeding mechanism to continue feeding the wire in response to an output signal indicating non-contact between the wire electrode and the workpiece, and electrode contact detection means when the wire feeding is stopped. The table drive mechanism that moves the XY table is operated when an output signal indicating contact between the wire electrode and the workpiece is received, and during the operation, an output from the electrode contact detection means indicating non-contact between the wire electrode and the workpiece is generated. 1. An automatic wire feeder for a wire electrical discharge machining apparatus, comprising table position control means for controlling a table drive mechanism to stop movement of an XY table upon receiving a signal.
(2)ワイヤ送給制御手段は電極接触検出手段の出力信
号を受けてから一定時間経過後にワイヤ送給を停止させ
るようワイヤ送給機構を制御する遅延手段を有すること
を特徴とする特許請求の範囲第1項記載のワイヤ放電加
工装置のワイヤ自動供給装置。
(2) The wire feeding control means has a delay means for controlling the wire feeding mechanism so as to stop the wire feeding after a certain period of time has passed after receiving the output signal of the electrode contact detection means. An automatic wire feeding device for a wire electrical discharge machining device according to scope 1.
(3)ワイヤ電極を自動的にXYテーブル上の工作物に
供給するワイヤ放電加工装置のワイヤ自動供給装置にお
いて、ワイヤ電極を工作物側へ送り出すワイヤ送給機構
と、送り出されたワイヤ電極が工作物に接触したか否か
を検出する電極接触検出手段と、電極接触検出手段のワ
イヤ電極と工作物の接触を知らせる出力信号を受けてワ
イヤ送給を停止させ、その停止後に電極接触検出手段の
ワイヤ電極と工作物の非接触を知らせる出力信号を受け
てワイヤ送給を続行させるようワイヤ送給機構を制御す
るワイヤ送給制御手段と、ワイヤ送給が停止させられた
状態で電極接触検出手段のワイヤ電極と工作物の接触を
知らせる出力信号を受けたときにXYテーブルを移動さ
せるテーブル駆動機構を動作させ、その動作中に電極接
触検出手段からのワイヤ電極と工作物の非接触を知らせ
る出力信号を受けたら、XYテーブルの移動を停止させ
るようテーブル駆動機構を制御するテーブル位置制御手
段と、ワイヤ送給と共にワイヤ送り方向に向けて加工液
をジェット噴出し、電極接触検出手段のワイヤ電極と工
作物の接触を知らせる出力信号を受けて加工液のジェッ
ト噴出を停止させ、その停止後に、電極接触検出手段の
ワイヤ電極と工作物の非接触を知らせる出力信号を受け
て加工液のジェット噴出を続行させるように制御する加
工液供給制御手段とを備えてなることを特徴とするワイ
ヤ放電加工装置のワイヤ自動供給装置。
(3) In the automatic wire feeding device of wire electrical discharge machining equipment that automatically feeds the wire electrode to the workpiece on the An electrode contact detection means detects whether or not the wire has come into contact with an object, and the wire feeding is stopped in response to an output signal indicating contact between the wire electrode of the electrode contact detection means and the workpiece, and after the wire feeding is stopped, the electrode contact detection means detects contact with an object. Wire feeding control means for controlling the wire feeding mechanism to continue feeding the wire in response to an output signal indicating non-contact between the wire electrode and the workpiece, and electrode contact detection means when the wire feeding is stopped. The table drive mechanism that moves the XY table is operated when an output signal indicating contact between the wire electrode and the workpiece is received, and during the operation, an output from the electrode contact detection means indicating non-contact between the wire electrode and the workpiece is generated. When the signal is received, the table position control means controls the table drive mechanism to stop the movement of the XY table, and the wire electrode of the electrode contact detection means jets machining fluid in the wire feeding direction as the wire is fed. The jet of machining fluid is stopped in response to an output signal that indicates contact with the workpiece, and after the stop, the jet of machining fluid is stopped in response to an output signal that indicates that the wire electrode of the electrode contact detection means is not in contact with the workpiece. 1. An automatic wire feeding device for a wire electric discharge machining device, comprising: a machining fluid supply control means for controlling the machining fluid supply to continue.
JP28753187A 1987-11-16 1987-11-16 Automatic wire feeding device of wire electric discharge machine Pending JPH01135423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28753187A JPH01135423A (en) 1987-11-16 1987-11-16 Automatic wire feeding device of wire electric discharge machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28753187A JPH01135423A (en) 1987-11-16 1987-11-16 Automatic wire feeding device of wire electric discharge machine

Publications (1)

Publication Number Publication Date
JPH01135423A true JPH01135423A (en) 1989-05-29

Family

ID=17718544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28753187A Pending JPH01135423A (en) 1987-11-16 1987-11-16 Automatic wire feeding device of wire electric discharge machine

Country Status (1)

Country Link
JP (1) JPH01135423A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360925A (en) * 1989-07-27 1991-03-15 Mitsubishi Electric Corp Wire electric discharging machine
JPH03234420A (en) * 1990-02-13 1991-10-18 Makino Milling Mach Co Ltd Wire electrode automatic connecting method for wire electric discharge machine
WO2012128364A1 (en) 2011-03-23 2012-09-27 株式会社ソディック Wire discharge machining device
EP3061555A1 (en) 2015-02-24 2016-08-31 Fanuc Corporation Wire electric discharge machine and wire electric discharge machining method capable of correcting starting hole position
US10974333B2 (en) 2018-02-01 2021-04-13 Fanuc Corporation Wire electrical discharge machine and method of controlling wire electrical discharge machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119327A (en) * 1980-02-26 1981-09-18 Mitsubishi Electric Corp Wire cutting electric discharge machining method
JPS62120920A (en) * 1985-11-20 1987-06-02 Mitsubishi Electric Corp Automatic supply device for wire
JPS62162425A (en) * 1986-01-13 1987-07-18 Makino Milling Mach Co Ltd Automatically loading method for wire electrode for wire-cut electric discharge machine and device therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119327A (en) * 1980-02-26 1981-09-18 Mitsubishi Electric Corp Wire cutting electric discharge machining method
JPS62120920A (en) * 1985-11-20 1987-06-02 Mitsubishi Electric Corp Automatic supply device for wire
JPS62162425A (en) * 1986-01-13 1987-07-18 Makino Milling Mach Co Ltd Automatically loading method for wire electrode for wire-cut electric discharge machine and device therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360925A (en) * 1989-07-27 1991-03-15 Mitsubishi Electric Corp Wire electric discharging machine
JPH03234420A (en) * 1990-02-13 1991-10-18 Makino Milling Mach Co Ltd Wire electrode automatic connecting method for wire electric discharge machine
WO2012128364A1 (en) 2011-03-23 2012-09-27 株式会社ソディック Wire discharge machining device
US9254529B2 (en) 2011-03-23 2016-02-09 Sodick Co., Ltd. Wire electric discharge machining apparatus
EP3061555A1 (en) 2015-02-24 2016-08-31 Fanuc Corporation Wire electric discharge machine and wire electric discharge machining method capable of correcting starting hole position
US10507539B2 (en) 2015-02-24 2019-12-17 Fanuc Corporation Wire electric discharge machine and method for correcting wire electrode connection hole position
US10974333B2 (en) 2018-02-01 2021-04-13 Fanuc Corporation Wire electrical discharge machine and method of controlling wire electrical discharge machine

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