JP2000190131A - Engraving electric discharge machine - Google Patents

Engraving electric discharge machine

Info

Publication number
JP2000190131A
JP2000190131A JP10346602A JP34660298A JP2000190131A JP 2000190131 A JP2000190131 A JP 2000190131A JP 10346602 A JP10346602 A JP 10346602A JP 34660298 A JP34660298 A JP 34660298A JP 2000190131 A JP2000190131 A JP 2000190131A
Authority
JP
Japan
Prior art keywords
electric discharge
machining
small
main shaft
spindle
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.)
Granted
Application number
JP10346602A
Other languages
Japanese (ja)
Other versions
JP3427172B2 (en
Inventor
Sakae Kasazaki
栄 笠崎
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.)
Makino Milling Machine Co Ltd
Original Assignee
Makino Milling Machine Co Ltd
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
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Application filed by Makino Milling Machine Co Ltd filed Critical Makino Milling Machine Co Ltd
Priority to JP34660298A priority Critical patent/JP3427172B2/en
Publication of JP2000190131A publication Critical patent/JP2000190131A/en
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  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PROBLEM TO BE SOLVED: To electric discharge machine a work while the efficient jump operation is performed by providing a main shaft head with a small-shaped main shaft which is moved in the direction parallel to the axial direction of the main shaft head, the movement being controllable independently of the main shaft head. SOLUTION: A small-sized main shaft 25 is provided movably in the direction of an axis W parallel to the axis Z in a main shaft head 17, and a rib electrode 31 is fitted to the lower end of the small-sized main shaft 25 through a insulating plate 27 and an electrode holder 29. In performing fine electric discharge machining, the plate and the holder are removed and the small-sized main shaft 25 stored in the main shaft head 17 are projected from the main shaft head 17, and the rib electrode 31 is fitted to the main shaft 25 to be driven in the direction of the axis W, thereby performing fine and deep electric discharge machining for a work 3. The reason for performing such fine electric discharge machining using the small-sized main shaft 25 is that as the main shaft head 17 has large inertia, so it is not suitable for jump operation in the fine electric discharge machining, and the small-sized main shaft 25 having inertia smaller than that of the main shaft head 17 is used to conduct the jump operation for removing machining chips efficiently.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、電極とワークとを
相対移動させてワークを放電加工する形彫放電加工機、
及び放電加工中に電極を強制的に上昇、下降させて、電
極とワークとの加工間隙から加工屑を排除するジャンプ
動作を行う形彫放電加工機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die-sinking electric discharge machine for performing electric discharge machining of a work by relatively moving an electrode and the work.
Also, the present invention relates to a die-sinking electric discharge machine that performs a jump operation for forcibly raising and lowering an electrode during electric discharge machining to remove machining chips from a machining gap between the electrode and a workpiece.

【0002】[0002]

【従来の技術】図6は、従来の形彫放電加工機の正面図
であり、その概略構成を説明すると、ベッド1上にワー
ク3を載置するテーブル5が設けられ、テーブル5上に
ワーク3を加工液に浸すための加工槽7が設けられ、加
工槽7に充満させる加工液が漏れないようテーブル5と
加工槽7との間にシール9が設けられている。そして放
電加工は加工液中のワーク3と形彫加工用電極23との
間で行われる。図6は、加工槽7が上下動する形式のも
のを示しているが、加工槽7を上下動させずにテーブル
5上に固定した形式のものを採用してもよい。
2. Description of the Related Art FIG. 6 is a front view of a conventional die-sinking electric discharge machine. A schematic structure thereof will be described. A table 5 on which a work 3 is placed on a bed 1 is provided. A processing tank 7 for immersing the processing liquid 3 in a processing liquid is provided, and a seal 9 is provided between the table 5 and the processing tank 7 so that the processing liquid filling the processing tank 7 does not leak. Then, electric discharge machining is performed between the workpiece 3 in the machining fluid and the engraving electrode 23. FIG. 6 shows a type in which the processing tank 7 moves up and down, but a type in which the processing tank 7 is fixed on the table 5 without moving up and down may be adopted.

【0003】図1及び図2は、本発明の形彫放電加工機
の正面図及び側面図を示すものであり、その大部分の構
成は図6に示す従来の形彫放電加工機と同様であるの
で、図2を図6に示す形彫放電加工機の側面図とみなし
て説明する。
FIGS. 1 and 2 are a front view and a side view, respectively, of a die sinking electric discharge machine according to the present invention. Most of the construction is the same as that of the conventional die sinking electric discharge machine shown in FIG. Therefore, FIG. 2 will be described as a side view of the die sinking electric discharge machine shown in FIG.

【0004】図2において、ベッド1の後方にはコラム
11があり、コラム11の上面をサドル13がX軸方向
へ移動するよう設けられ、サドル13の上面をY軸方向
へ移動するようラム15が設けられている。また、ラム
15の前面には主軸頭17が適宜駆動手段(図示省略)
によりZ軸方向へ移動するよう設けられており、結局、
主軸頭17がX,Y,Z軸方向へ移動可能な構成となっ
ている。主軸頭17の下端には絶縁プレート19及び電
極ホルダ21を介して形彫加工用電極23が取り付けら
れている。
In FIG. 2, a column 11 is provided behind the bed 1. A saddle 13 is provided on the upper surface of the column 11 so as to move in the X-axis direction, and a ram 15 is provided on the upper surface of the saddle 13 so as to move in the Y-axis direction. Is provided. A spindle head 17 is provided on the front surface of the ram 15 as appropriate with driving means (not shown).
To move in the Z-axis direction.
The spindle head 17 is configured to be movable in the X, Y, and Z axis directions. An electrode 23 for engraving is attached to a lower end of the spindle head 17 via an insulating plate 19 and an electrode holder 21.

【0005】また、加工効率向上の面から同一の形彫放
電加工機において、加工ストローク及び加工面積が大き
い放電加工と細かい放電加工とを行うことが望まれてい
る。一般的には加工形状によって形彫加工用電極を適宜
交換して使用するが、機械の大きさや仕様によって好ま
しい加工エリアが異なる。例えば大形の形彫放電加工機
で細かい加工を行うときは、形彫加工用電極を取り付け
る主軸頭の慣性が大きいため、細かい放電加工に向かな
い。特にリブ溝加工と呼ばれる細くて深い放電加工で
は、放電加工中に形彫加工用電極を強制的に上昇、下降
させて、形彫加工用電極とワークとの加工間隙から加工
屑を排除する、いわゆるジャンプ動作の送り速度が加工
精度や加工速度を左右する。大形の主軸頭ではジャンプ
動作の送り速度を上げられず、小形の主軸頭に比較して
加工性能が悪い。
[0005] From the viewpoint of improving machining efficiency, it is desired to perform electric discharge machining with a large machining stroke and machining area and fine electric discharge machining in the same die sinking electric discharge machine. Generally, the electrodes for engraving are appropriately replaced and used depending on the processing shape, but the preferable processing area differs depending on the size and specifications of the machine. For example, when performing fine machining with a large-size sculpture electric discharge machine, the inertia of the spindle head to which the sculpture machining electrode is attached is large, so that it is not suitable for fine electric discharge machining. In particular, in the thin and deep electric discharge machining called rib groove machining, the electrode for engraving is forcibly raised and lowered during electric discharge machining, and machining chips are removed from the machining gap between the electrode for engraving and the workpiece. The feed speed of the so-called jump operation affects the processing accuracy and the processing speed. The feed speed of the jump operation cannot be increased with a large spindle head, and the machining performance is lower than that of a small spindle head.

【0006】その理由について説明すると、リブ溝等の
細くて深い穴を放電加工する場合、加工穴が段々深くな
るにつれて加工屑が排出されず加工穴の中に溜り、それ
に伴い形彫加工用電極と加工屑との間で二次放電が起こ
り、ワークの放電加工が進捗しなくなってしまうからで
ある。
The reason for this is as follows. In the case where a small and deep hole such as a rib groove is subjected to electric discharge machining, as the hole is gradually deepened, the cutting chips are not discharged and accumulate in the hole. This is because a secondary discharge occurs between the workpiece and the machining waste, and the electrical discharge machining of the work does not progress.

【0007】こういう事態が生じた場合、形彫加工用電
極に加工電圧を印加するのを止め、一旦形彫加工用電極
をワークの加工穴の外に急速に持ち上げ(上昇)、再び
ワークの加工穴の中に急速に戻す(下降)ようなジャン
プ動作を実行すると、形彫加工用電極とワークとの加工
間隙から加工屑が排除され、その後の放電加工を順調に
行うことができる。なお、ジャンプ動作のストロークは
加工深さと同等または加工深さよりわずかに大きい程度
が望ましい。
When such a situation occurs, the application of the machining voltage to the engraving electrode is stopped, and the engraving electrode is quickly lifted (raised) out of the machining hole of the work, and the work is processed again. By executing a jump operation such as returning (falling) rapidly into the hole, machining waste is removed from the machining gap between the engraving electrode and the workpiece, and subsequent electric discharge machining can be performed smoothly. It is desirable that the stroke of the jump operation be equal to or slightly larger than the machining depth.

【0008】また、主軸頭に取り付けられた形彫加工用
電極の面積が大きい場合は、ジャンプ動作の送り速度が
小さくても、形彫加工用電極とワークとの加工間隙から
加工屑の排除が比較的効率よく行われるが、電極面積が
小さい場合、即ち小さい形彫加工用電極を取り付けて細
くて深い放電加工を行う場合では、ジャンプ動作の送り
速度を速くしないと、形彫加工用電極とワークとの加工
間隙から加工屑の排除が良好に行われなくなる。このた
め、ジャンプ動作は電極面積に応じた好ましい送り速度
で行う必要がある。
Further, when the area of the engraving electrode attached to the spindle head is large, even if the feed speed of the jumping operation is low, the processing debris is not removed from the machining gap between the engraving electrode and the work. It is performed relatively efficiently, but when the electrode area is small, that is, when a small and deep electric discharge machining is performed by attaching a small engraving electrode, unless the feed speed of the jump operation is increased, the engraving electrode and the Elimination of machining waste from the machining gap with the work cannot be performed well. For this reason, the jump operation needs to be performed at a preferable feed speed according to the electrode area.

【0009】さらに、形彫放電加工に際して、大形の主
軸頭に小さい形彫加工用電極を取り付けてジャンプ動作
させると、主軸頭全体の慣性が大きいため、短時間でジ
ャンプ動作を行わせることが困難である。このため、実
質的に放電加工を行っていないジャンプ動作の時間が長
くなり、当然のごとく加工時間が長くなってしまう。ま
た、ジャンプ動作の送り速度が遅いと、形彫加工用電極
とワークとの加工間隙から効果的に加工屑が排除され
ず、加工効率が向上しない。
[0009] Furthermore, when performing a jump operation by attaching a small engraving electrode to the large spindle head during the sinking electric discharge machining, the jump operation can be performed in a short time because the inertia of the entire spindle head is large. Have difficulty. For this reason, the time of the jump operation in which the electric discharge machining is not substantially performed becomes longer, and the machining time naturally becomes longer. Also, if the feed speed of the jump operation is low, the processing waste is not effectively removed from the processing gap between the engraving electrode and the work, and the processing efficiency is not improved.

【0010】このように、大形の形彫放電加工機におい
ては、主軸頭の慣性が大きいという理由から細かい放電
加工には適さない。また、大形の主軸頭を高速でジャン
プ動作させるためには、Z軸の駆動手段に大形のものを
用いる必要も生じる。
As described above, a large-sized die-sinking electric discharge machine is not suitable for fine electric discharge machining because the inertia of the spindle head is large. In addition, in order to perform a jump operation of a large spindle head at a high speed, it is necessary to use a large Z-axis driving means.

【0011】すなわち、大形の主軸頭は小形の電極によ
る放電加工には適さないことになる。特にリブ溝加工と
呼ばれる細くて深い放電加工では、ジャンプ動作の送り
速度が加工性能を大きく左右するが、大形の主軸頭では
ジャンプ動作の送り速度を上げられず、加工性能が悪
い。従来の技術におけるジャンプ動作は、せいぜい10
m/min以下の比較的低速の送り速度で行われてい
た。
That is, a large spindle head is not suitable for electric discharge machining using small electrodes. In particular, in the case of thin and deep electric discharge machining called rib groove machining, the feed speed of the jump operation largely affects the machining performance. However, the feed speed of the jump operation cannot be increased with a large spindle head, and the machining performance is poor. The jump operation in the prior art is at most 10
It was performed at a relatively low feed rate of less than m / min.

【0012】また、特開平6−277948号公報に開
示されているように、ジャンプ動作の上昇、下降のパタ
ーンは、大きなストロークのジャンプ動作の後に小さな
ストロークのジャンプ動作を行う方法が用いられてい
た。図10(a)は、従来の形彫放電加工機のジャンプ
制御を適用してジャンプ動作を行いながら放電加工を進
捗しているときの形彫加工用電極の位置を表わした図で
あり、図10(b)は、それに対応させて加工電源のオ
ン、オフ、すなわち放電加工中か放電加工休止中かを示
す加工電源の波形を表わした図である。
Further, as disclosed in Japanese Patent Application Laid-Open No. 6-277948, a method of performing a jump operation of a small stroke followed by a jump operation of a small stroke has been used for the pattern of rising and falling of the jump operation. . FIG. 10A is a diagram showing the positions of the electrodes for engraving when the electric discharge machining is progressing while performing the jump operation by applying the jump control of the conventional engraving electric discharge machine. FIG. 10B is a diagram showing the waveform of the machining power supply corresponding to the ON / OFF state of the machining power supply, that is, whether the electric discharge machining is being performed or the electric discharge machining is being stopped.

【0013】ここで、従来の技術におけるジャンプ動作
の大きなストローク及び小さなストロークはそれぞれあ
らかじめ設定された一定量であり、放電加工の進捗とと
もに、ジャンプ動作の上昇位置がワーク表面位置より下
になっていき、形彫加工用電極とワークとの加工間隙か
らの加工屑の排除量が減少してしまう。さらに、ジャン
プ動作の送り速度が比較的低速であるためにジャンプ動
作の時間が長くなり、実質的にジャンプ動作中は加工電
源をオフして放電加工を行わないので、その分加工時間
が長くなってしまうという問題点があった。
Here, the large stroke and the small stroke of the jump operation in the prior art are predetermined constant amounts, respectively, and as the electric discharge machining progresses, the rising position of the jump operation becomes lower than the work surface position. In addition, the amount of machining waste removed from the machining gap between the electrode for engraving and the workpiece is reduced. Furthermore, since the feed speed of the jump operation is relatively low, the time of the jump operation becomes longer. During the jump operation, the machining power is turned off and electric discharge machining is not performed, so that the machining time becomes longer. There was a problem that would.

【0014】[0014]

【発明が解決しようとする課題】本発明は、上記したよ
うな大形の主軸頭における小形電極の使用に際しての問
題点を解消し、形彫放電加工機の加工性能の向上を図る
ことを課題とする。さらに、形彫加工用電極とワークと
の加工間隙から加工屑を確実かつ迅速に排除して、ワー
クの加工時間を短縮するジャンプ制御を行うことができ
る形彫放電加工機を提供することを課題とする。
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in using a small electrode in a large spindle head and to improve the machining performance of an EDM. And Furthermore, it is another object of the present invention to provide a sculpture electric discharge machine capable of performing a jump control for shortening a work time of a work by reliably and quickly removing machining swarf from a machining gap between a sculpture electrode and a work. And

【0015】[0015]

【課題を解決するための手段】本発明の形彫放電加工機
は、上記課題を解決するために、主軸頭内部に小形主軸
を内蔵させるか、主軸頭の側面部に小形主軸を併設させ
るかしたものである。また、形彫放電加工機のジャンプ
制御部は、ジャンプ動作の毎回の上昇をワーク表面の加
工開始点以上の位置まで行い、ジャンプ動作の上昇、下
降の送り速度を40m/min以上で、送りの加減速加
速度を1.0G(Gは重力加速度)以上にするものであ
り、詳しくは下記のように構成されている。
In order to solve the above-mentioned problems, the die sinking electric discharge machine of the present invention has a built-in small spindle inside the spindle head or a small spindle attached to a side surface of the spindle head. It was done. The jump control unit of the die sinking electric discharge machine raises the jump operation each time to a position equal to or higher than the processing start point on the work surface, and sets the feed speed of the jump operation upward and downward at 40 m / min or more. The acceleration / deceleration is set to 1.0 G or more (G is a gravitational acceleration) or more, and is configured as follows in detail.

【0016】(1) 主軸頭に取り付けられた電極とワ
ークとを相対移動させて前記ワークを放電加工する形彫
放電加工機において、前記主軸頭に、前記主軸頭の軸線
方向と平行な方向へ移動し、該移動が前記主軸頭と独立
して制御可能な小形主軸を備えた形彫放電加工機。 (2) 前記小形主軸は前記主軸頭の内部に移動可能に
設けられる上記(1)に記載の形彫放電加工機。 (3) 前記小形主軸は前記主軸頭の側面に移動可能に
設けられる上記(1)に記載の形彫放電加工機。 (4) 前記小形主軸の送り駆動手段はリニアモータで
構成される上記(1)から(3)のいずれか1項に記載
の形彫放電加工機。 (5) 前記小形主軸の最大送り速度は40m/min
以上で、送りの最大加減速加速度は1.0G以上である
上記(4)に記載の形彫放電加工機。
(1) In a die sinking electric discharge machine for performing electric discharge machining on the work by relatively moving an electrode and a work attached to the spindle head, the spindle head is disposed on the spindle head in a direction parallel to the axial direction of the spindle head. A die sinking electric discharge machine having a small spindle which moves and which movement can be controlled independently of the spindle head. (2) The die sinking electric discharge machine according to (1), wherein the small spindle is movably provided inside the spindle head. (3) The die sinking electric discharge machine according to (1), wherein the small spindle is movably provided on a side surface of the spindle head. (4) The die sinking electric discharge machine according to any one of the above (1) to (3), wherein the feed driving means of the small spindle is constituted by a linear motor. (5) The maximum feed speed of the small spindle is 40 m / min.
In the above, the die sinking electric discharge machine according to the above (4), wherein the maximum acceleration / deceleration of the feed is 1.0 G or more.

【0017】(6) 前記小形主軸にジャンプ動作を行
わせるジャンプ制御部を備える上記(1)から(5)の
いずれか1項に記載の形彫放電加工機。 (7) 前記ジャンプ制御部は、前記ジャンプ動作の上
昇、下降の送り速度は40m/min以上で、送りの加
減速加速度は1.0G以上で前記ジャンプ動作を行わせ
る上記(6)に記載の形彫放電加工機。 (8) 前記ジャンプ制御部は、前記ジャンプ動作の毎
回の上昇をワーク表面の加工開始点以上の位置まで行
い、前記ジャンプ動作の上昇、下降の送り速度は40m
/min以上で、送りの加減速加速度は1.0G以上で
前記ジャンプ動作を行わせる上記(6)に記載の形彫放
電加工機。
(6) The die sinking electric discharge machine according to any one of (1) to (5), further including a jump control unit for causing the small spindle to perform a jump operation. (7) The jump control unit according to (6), wherein the jump control unit causes the jump operation to perform the jump operation at an ascending or descending feed speed of 40 m / min or more, and at an acceleration or deceleration of 1.0 G or more. Die-sinker EDM. (8) The jump control section performs the ascent of the jump operation each time to a position equal to or more than the processing start point on the work surface, and the feed speed of the ascent and descent of the jump operation is 40 m.
The die sinking electric discharge machine according to the above (6), wherein the jump operation is performed at an acceleration / deceleration of feed of 1.0 G or more at / min or more.

【0018】[0018]

【作用】上述の構成により、本発明による形彫放電加工
機は、小形主軸に電極を取り付け、効率のよいジャンプ
動作を行いながらワークを放電加工する。サイズまたは
重量の関係上、小形主軸に取り付けることができない比
較的大きな電極は、主軸頭に直接的に取り付けてワーク
を放電加工する。
According to the above construction, the die sinking electric discharge machine according to the present invention mounts an electrode on a small main shaft and discharges a workpiece while performing an efficient jump operation. A relatively large electrode that cannot be attached to a small spindle due to size or weight is attached directly to the spindle head to subject the workpiece to electrical discharge machining.

【0019】また、放電加工の進捗状況にかかわらず、
ジャンプ動作の毎回の上昇をワーク表面の加工開始点以
上の位置まで行ったり、かつジャンプ動作の上昇、下降
の送り速度を40m/min以上、送りの加減速加速度
を1.0G以上と高速、俊敏なジャンプ動作の制御を行
うので、1往復のジャンプ動作中に十分なポンピング作
用が得られ、電極とワークとの加工間隙から加工屑を確
実かつ迅速に排除することができる。
Regardless of the progress of the electric discharge machining,
Each time the jump operation is raised to a position equal to or higher than the processing start point on the surface of the work, and the speed at which the jump operation is raised or lowered is 40 m / min or more, and the acceleration or deceleration of the feed is 1.0 G or more. Since the control of the jump operation is performed, a sufficient pumping action can be obtained during one reciprocating jump operation, and the processing chips can be reliably and promptly removed from the processing gap between the electrode and the workpiece.

【0020】さらに、大形の主軸頭と小形主軸とを切り
換え可能に併設してあるので、大形放電加工のほか、小
形放電加工時におけるジャンプ動作を行いながらの放電
加工にも適しており、効率のよい放電加工を行うことが
できる。
Further, since a large spindle head and a small spindle are provided so as to be switchable, it is suitable not only for large electric discharge machining but also for electric discharge machining while performing a jump operation in small electric discharge machining. Efficient electric discharge machining can be performed.

【0021】なお、特許第2693023号公報には、
多頭の主軸頭を有する形彫放電加工機が開示されている
が、これは各主軸頭を独立して制御して大形のワークの
放電加工効率を高めるものであり、本発明のように、形
彫放電加工機における小形のワークの加工に際して加工
屑排除のためのジャンプ動作に適するよう主軸頭を切り
換えるということを想定したものではない。
Incidentally, Japanese Patent No. 2693023 discloses that
Die-sinker EDM with multiple spindle heads is disclosed, but this is to increase the EDM efficiency of large workpieces by controlling each spindle head independently, as in the present invention, This does not assume that the spindle head is switched so as to be suitable for a jumping operation for removing machining chips when machining a small work in a die sinking electric discharge machine.

【0022】また、特開昭62−15015号公報に
は、複数の電極を有した形彫放電加工機が開示されてい
るが、これは同一ヘッドに複数の電極を取り付けると
か、複数のヘッドにそれぞれ電極を取り付けて別々に放
電加工を行うものであり、本発明のように、大形の主軸
頭では加工に適さない場合に小形主軸に切り換えて細か
い放電加工を効率よく行うものとは、その目的、作用、
及び効果が相違する。
Japanese Unexamined Patent Publication (Kokai) No. 62-15015 discloses a Die-sinker EDM having a plurality of electrodes. It is to separately perform electric discharge machining by attaching electrodes, and as in the present invention, when a large spindle head is not suitable for machining, switching to a small spindle and efficiently performing fine electric discharge machining means that Purpose, action,
And the effect is different.

【0023】[0023]

【発明の実施の形態】図1は、本発明の一実施形態の形
彫放電加工機を示す正面図、図2は、図1の側面図であ
り、その構成部材の名称及び符号ついては、図6に示し
た従来の形彫放電加工機の構成と対応する部分は同一の
名称及び符号を用いて説明する。
FIG. 1 is a front view showing a die sinking electric discharge machine according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. Parts corresponding to the configuration of the conventional die sinking electric discharge machine shown in FIG.

【0024】図1及び図2に示す本発明実施形態の形彫
放電加工機においては、図2のA−A断面図である図3
及び図3のB−B断面図である図4に示すように、主軸
頭17内にZ軸と平行なW軸方向に移動できるよう小形
主軸25を設け、小形主軸25の下端に絶縁プレート2
7及び電極ホルダ29を介してリブ電極31が取り付け
られている。なお、小形主軸25を使用しない場合は、
従来の形彫放電加工機と同様の状態となるよう主軸頭1
7内に小形主軸25を収納して、図6のように主軸頭1
7の下端に形彫加工用電極23を取り付け、ワーク3を
放電加工する。
In the die sinking electric discharge machine according to the embodiment of the present invention shown in FIGS. 1 and 2, FIG.
As shown in FIG. 4 which is a sectional view taken along line BB of FIG. 3, a small spindle 25 is provided in the spindle head 17 so as to be movable in the W-axis direction parallel to the Z-axis.
The rib electrode 31 is attached via the electrode holder 7 and the electrode holder 29. When not using the small spindle 25,
Spindle head 1 so that it is in the same state as the conventional EDM
7, a small spindle 25 is housed therein, and as shown in FIG.
The work engraving electrode 23 is attached to the lower end of 7, and the workpiece 3 is subjected to electric discharge machining.

【0025】なお、絶縁プレート19及び電極ホルダ2
1は何れも適宜取り付け、取り外し可能とされており、
細かい放電加工を行うときは、これらを取り外して主軸
頭17内に収納されている小形主軸25を主軸頭17よ
り突出させ、その下端にリブ電極31を取り付けてW軸
方向に駆動することにより、ワーク3に細くて深い放電
加工を行う。ここで、小形主軸25のX,Y,Z軸方向
の位置決めは主軸頭17の場合と同様に行われるが、位
置決め後の放電加工に際しては、W軸方向の移動は適宜
送り駆動手段、例えばボールねじとサーボモータとの組
み合わせ、または、図3及び図4に示すように、リニア
モータを用いて行う。
The insulating plate 19 and the electrode holder 2
1 is suitably attached and detachable,
When performing fine electric discharge machining, these are removed, the small spindle 25 housed in the spindle head 17 is protruded from the spindle head 17, and a rib electrode 31 is attached to the lower end thereof and driven in the W-axis direction. A thin and deep electric discharge machining is performed on the work 3. Here, the positioning of the small main shaft 25 in the X, Y, and Z-axis directions is performed in the same manner as in the case of the main spindle head 17. This is performed using a combination of a screw and a servo motor, or using a linear motor as shown in FIGS.

【0026】本発明において、小形主軸25を用いて細
かい放電加工を行うのは、主軸頭17は慣性が大きく細
かい放電加工におけるジャンプ動作に適しておらず、主
軸頭17に比べ慣性の小さい小形主軸25を用い、加工
屑排除のためのジャンプ動作を効率よく行うためであ
る。
In the present invention, the reason why the fine electric discharge machining is performed using the small spindle 25 is that the spindle head 17 has a large inertia and is not suitable for the jump operation in the fine electric discharge machining, and the small spindle has a smaller inertia than the spindle head 17. This is for efficiently performing the jump operation for removing the processing waste by using No. 25.

【0027】よって、主軸頭17を停止させ小形主軸2
5だけを移動させるするように構成し、主軸頭17と小
形主軸25とを併用するという考えはない。つまり、大
形の形彫放電加工機でも細かい放電加工に適した状態に
して使用できる形彫放電加工機を得ることが本発明の1
つの要旨である。
Therefore, the spindle head 17 is stopped and the small spindle 2 is stopped.
There is no idea that the spindle head 17 and the small spindle 25 are used in combination so that only the spindle 5 is moved. That is, one of the objects of the present invention is to obtain a die sinking electric discharge machine that can be used in a state suitable for fine electric discharge machining even with a large die sinking electric discharge machine.
There are two points.

【0028】次に、図3及び図4に従って、小形主軸2
5の構成について説明する。図3及び図4において、斜
線部分が主軸頭17の外筺となるZ軸クイル33であ
り、Z軸クイル33の背面に設けられたZ軸レール35
がラム15に設けられたZ軸ガイド37に沿ってZ軸方
向へ案内され、適宜送り駆動手段により主軸頭17がZ
軸方向へ移動するよう構成されており、さらに、Z軸ク
イル33内を小形主軸25がW軸方向へZ軸クイル33
の下部開口部を通って移動する。
Next, according to FIG. 3 and FIG.
5 will be described. 3 and 4, a hatched portion is a Z-axis quill 33 which is an outer housing of the spindle head 17, and a Z-axis rail 35 provided on the back surface of the Z-axis quill 33.
Is guided in the Z-axis direction along a Z-axis guide 37 provided on the ram 15, and the spindle head 17 is moved to the Z-axis direction by an appropriate feed driving means.
The main spindle 25 is configured to move in the axial direction, and the small main shaft 25 is moved in the Z-axis quill 33 in the W-axis direction.
Moving through the lower opening of the.

【0029】Z軸クイル33の内部奥側には、小形主軸
25の案内、移動のためのW軸レール39及びリニアモ
ータ用マグネット41を取り付けるブラケット43が設
けられ、小形主軸25の外筺となるW軸クイル45に
は、W軸レール39に係合するW軸ガイド47、リニア
モータ用マグネット41と対をなすコイル49が取り付
けられ、コイル49とマグネット41との係合によりリ
ニアモータを形成し、小形主軸25のW軸方向の送り駆
動手段となっている。図3に示すように、小形主軸25
外筺となるW軸クイル45の下端には、絶縁プレート2
7及び電極ホルダ29を介してリブ電極31が取り付け
られている。
A bracket 43 for mounting a W-axis rail 39 for guiding and moving the small spindle 25 and a magnet 41 for a linear motor is provided on the inner rear side of the Z-axis quill 33, and serves as an outer casing of the small spindle 25. The W-axis quill 45 is provided with a W-axis guide 47 that engages with the W-axis rail 39 and a coil 49 that is paired with the linear motor magnet 41. The engagement of the coil 49 and the magnet 41 forms a linear motor. , A feed driving means for the small main shaft 25 in the W-axis direction. As shown in FIG.
An insulating plate 2 is provided at the lower end of the W-axis quill 45 serving as an outer casing.
The rib electrode 31 is attached via the electrode holder 7 and the electrode holder 29.

【0030】なお、図1及び図2に示す本発明実施形態
の形彫放電加工機は、主軸頭17内に小形主軸25が内
蔵された形式のものが示されているが、これに限定され
ることはなく、図5に正面図として示すように、主軸頭
17の側面部に内蔵形の小形主軸25と同様の小形主軸
51をW軸方向へ移動可能に設けることもできる。
The die sinking electric discharge machine according to the embodiment of the present invention shown in FIGS. 1 and 2 is of a type in which a small spindle 25 is built in the spindle head 17, but the present invention is not limited to this. Instead, as shown in the front view of FIG. 5, a small main shaft 51 similar to the built-in small main shaft 25 may be provided on the side surface of the main shaft head 17 so as to be movable in the W-axis direction.

【0031】図7は、本発明の形彫放電加工機の小形主
軸25を用いてワーク3を放電加工する際の制御ブロッ
ク図である。小形主軸25をW軸方向へ移動させる送り
駆動手段としてリニアモータ53が設けられ、リニアモ
ータ53は駆動制御部57により制御される。また、小
形主軸25のW軸方向の位置は位置検出器55により刻
々検出される。加工電源部61からワーク3と電極ホル
ダ29を介してリブ電極31とに加工電圧が印加され
る。
FIG. 7 is a control block diagram when the workpiece 3 is subjected to electric discharge machining using the small main spindle 25 of the die sinking electric discharge machine according to the present invention. A linear motor 53 is provided as feed driving means for moving the small main shaft 25 in the W-axis direction, and the linear motor 53 is controlled by a drive control unit 57. The position of the small main shaft 25 in the W-axis direction is detected by the position detector 55 every moment. A processing voltage is applied from the processing power supply 61 to the work 3 and the rib electrode 31 via the electrode holder 29.

【0032】駆動制御部57と加工電源部61との両方
に接続するようジャンプ制御部59が設けられ、ジャン
プ制御部59は、加工電源部61からリブ電極31とワ
ーク3との時々刻々の極間電圧を検出して、リブ電極3
1とワーク3との加工間隙から加工屑が排除されずジャ
ンプ動作を必要とする極間電圧を検出したときに、加工
電源部61に放電加工休止指令を発するとともに、駆動
制御部57にリブ電極31をW軸方向へ上昇させるジャ
ンプ動作指令を送る。このときに、位置検出器55は最
大加工進捗位置を検出し、該位置は図示しない記憶部に
記憶される。
A jump control section 59 is provided so as to be connected to both the drive control section 57 and the processing power supply section 61. The jump control section 59 receives an instantaneous pole of the rib electrode 31 and the work 3 from the processing power supply section 61. The voltage between the ribs 3
When a machining gap is detected between the machining gap between the workpiece 1 and the workpiece 3 and a gap voltage that requires a jump operation is detected, an electric discharge machining stop command is issued to the machining power supply unit 61, and the drive control unit 57 is provided with a rib electrode. A jump operation command to raise 31 in the W-axis direction is sent. At this time, the position detector 55 detects the maximum processing progress position, and the position is stored in a storage unit (not shown).

【0033】次いで、位置検出器55が、あらかじめ設
定されたワーク3表面の加工開始点以上の位置までリブ
電極31が上昇したことを検出したとき、ジャンプ動作
を下降に転じる。そして、位置検出器55が、図示しな
い記憶部に記憶した最大加工進捗位置までリブ電極31
が下降したことを検出したとき、ジャンプ動作を停止さ
せ、加工電源部61に放電加工開始指令を発する。ジャ
ンプ制御部59は放電加工中にこのような一連の制御を
繰り返し行うのである。
Next, when the position detector 55 detects that the rib electrode 31 has risen to a position equal to or higher than the preset processing start point on the surface of the work 3, the jump operation is turned to lower. Then, the position detector 55 moves the rib electrode 31 to the maximum processing progress position stored in the storage unit (not shown).
When it is detected that the power supply has dropped, the jump operation is stopped, and an electric discharge machining start command is issued to the machining power supply unit 61. The jump control section 59 repeatedly performs such a series of controls during electric discharge machining.

【0034】ここで、ジャンプ動作の開始のタイミング
は加工電源部61からの極間電圧によらず、ジャンプ制
御部59にあらかじめ設定された時間周期で行わせるよ
うにしてもよい。また、ジャンプ制御部59には、ジャ
ンプ動作の上昇、下降の送り速度及び送りの加減速加速
度があらかじめ設定されており、小形主軸25を移動さ
せるW軸の送り駆動手段は、その送り速度が40m/m
in以上、送りの加減速加速度が1.0G(Gは重力加
速度)以上を出せるような能力を有していることが好ま
しい。本発明実施形態の形彫放電加工機における小形主
軸25のW軸の送り駆動手段はリニアモータ53を用い
ており、上記した能力を有していることは言うまでもな
い。
Here, the timing of the start of the jump operation may be made to be performed by the jump control section 59 at a preset time cycle without depending on the voltage between the electrodes from the machining power supply section 61. In the jump control unit 59, the feed speed of the ascent and descent of the jump operation and the acceleration / deceleration of the feed are set in advance, and the feed drive means of the W-axis for moving the small main shaft 25 has a feed speed of 40 m. / M
In or more, it is preferable to have the ability to output acceleration / deceleration of 1.0 G (G is gravitational acceleration) or more. It is needless to say that the linear motor 53 is used as the feed drive means for the W-axis of the small main shaft 25 in the sinker electric discharge machine of the embodiment of the present invention, and has the above-described ability.

【0035】図8(a)は、本発明の形彫放電加工機の
ジャンプ制御を適用してジャンプ動作を行いながら放電
加工を進捗しているときの形彫加工用電極の位置を表わ
した図であり、図8(b)は、それに対応させて加工電
源のオン、オフ、すなわち放電加工中か放電加工休止中
かを示す加工電源の波形を表わした図である。
FIG. 8 (a) is a diagram showing the position of the engraving electrode when the electric discharge machining is progressing while performing the jump operation by applying the jump control of the engraving electric discharge machine of the present invention. FIG. 8 (b) is a diagram showing the waveform of the machining power supply indicating ON / OFF of the machining power supply, that is, whether the electric discharge machining is being performed or the electric discharge machining is being stopped, correspondingly.

【0036】本発明におけるジャンプ動作の制御の特徴
は、放電加工の進捗状況にかかわらず、ジャンプ動作の
毎回の上昇をあらかじめ設定されたワーク表面の加工開
始点以上の位置まで行うこと、他の特徴は、ジャンプ動
作の上昇、下降の送り速度を40m/min以上、送り
の加減速加速度を1.0G以上で行うことである。こう
した条件下では、より長いストロークをより高速かつ俊
敏にジャンプ動作させることができる。つまり、図8
(b)から明らかなように、ジャンプ動作の時間が短
く、放電加工時間が放電加工休止時間より長くなる。図
10(b)に示したように、従来のジャンプ動作におけ
る放電加工と比較しても、加工効率の差は歴然としてい
る。
The feature of the control of the jump operation in the present invention is that, regardless of the progress of the electric discharge machining, the jump operation is performed every time up to a position equal to or higher than a preset machining start point on the work surface. Means that the jump speed is raised and lowered at a feed speed of 40 m / min or more and the feed acceleration / deceleration is 1.0 G or more. Under these conditions, a longer stroke can be made to jump at a higher speed and agility. That is, FIG.
As apparent from (b), the jump operation time is short, and the electric discharge machining time is longer than the electric discharge machining pause time. As shown in FIG. 10B, the difference in machining efficiency is obvious even compared to the electric discharge machining in the conventional jump operation.

【0037】図9(a)は、リブ電極31の形状を表わ
した図であり、図9(b)は、従来の形彫放電加工機に
おけるジャンプ制御を適用して図9(a)に示すような
リブ電極31でワーク3を放電加工したとき、または、
本発明の形彫放電加工機におけるジャンプ制御を適用し
て図9(a)に示すようなリブ電極31でワーク3を放
電加工したときの実験結果を示した図である。
FIG. 9A is a diagram showing the shape of the rib electrode 31, and FIG. 9B is shown in FIG. 9A by applying jump control in a conventional die sinking electric discharge machine. When the workpiece 3 is subjected to electrical discharge machining with such a rib electrode 31, or
FIG. 10 is a diagram showing an experimental result when the workpiece 3 is subjected to electric discharge machining with the rib electrode 31 as shown in FIG. 9A by applying the jump control in the sinker electric discharge machine of the present invention.

【0038】図9(a)に示すように、リブ電極31と
は先端部に向かって勾配を持っている薄板形状、例えば
先端部の厚みが2mm、幅が50mm、先端部に向かっ
て片側1°のテーパを有するよう形成された形彫加工用
電極のことをいう。図9(b)において、縦軸は放電加
工が進捗するときの加工深さ、横軸はそのときの加工時
間を示している。
As shown in FIG. 9A, the rib electrode 31 is a thin plate shape having a gradient toward the tip, for example, a thickness of the tip 2 mm, a width of 50 mm, and one side toward the tip. An electrode for engraving formed to have a taper of °. In FIG. 9B, the vertical axis represents the machining depth when the electric discharge machining progresses, and the horizontal axis represents the machining time at that time.

【0039】ジャンプ動作における具体的な条件として
は、従来の技術は、図10(a)に示すような大きなス
トロークの後に小さなストロークを行うジャンプ動作の
パターンで、かつ例えば10m/min、0.2Gとい
う標準的な送り速度及び送りの加減速加速度で行い、本
発明は、図8(a)に示すようなあらかじめ設定された
ワーク表面の加工開始点以上の位置まで上昇させるジャ
ンプ動作のパターンで、かつ40m/min以上、1.
0G以上という送り速度及び送りの加減速加速度で行っ
た。
As a specific condition in the jump operation, the conventional technique is a jump operation pattern in which a small stroke is performed after a large stroke as shown in FIG. The present invention employs a standard feed speed and a feed acceleration / deceleration acceleration, and the present invention employs a jump operation pattern for raising the work surface to a position equal to or higher than a preset processing start point as shown in FIG. And 40 m / min or more;
The test was performed at a feed speed of 0 G or more and a feed acceleration / deceleration.

【0040】図9(b)から明らかなように、本発明の
ジャンプ制御を適用したときの方が、従来のジャンプ制
御を適用したときと比較して、同一の加工深さまでの放
電加工時間がはるかに短い。つまり、1往復のジャンプ
動作の間に、リブ電極31をワーク表面の加工開始点以
上の位置まで上昇させて、広い加工屑排出通路を確保す
るとともに、高速かつ俊敏なジャンプ動作で十分なポン
ピング作用を働かせて、リブ電極31とワーク3との加
工間隙から加工屑を加工液の水流で確実、迅速に排除で
きたことを意味している。よって、加工屑介在の異常放
電による放電加工速度の低下が起こらないのである。
As is clear from FIG. 9B, when the jump control of the present invention is applied, the electric discharge machining time to the same machining depth is shorter than when the conventional jump control is applied. Much shorter. That is, during one reciprocating jump operation, the rib electrode 31 is raised to a position at or above the processing start point on the work surface to secure a wide machining waste discharge passage and to perform a sufficient pumping action with a high-speed and agile jump operation. Means that the machining waste can be reliably and promptly removed from the machining gap between the rib electrode 31 and the workpiece 3 by the water flow of the machining fluid. Therefore, the electric discharge machining speed does not decrease due to the abnormal electric discharge caused by the machining waste.

【0041】なお、大形のリブ電極による形彫放電加工
を行う場合は、そのリブ電極を主軸頭17の下端に取り
付け、主軸頭17のZ軸の駆動手段として大形のリニア
モータを用い、Z軸方向にジャンプ動作を行わせること
も可能である。このときにも、送り速度を40m/mi
n以上で、送りの加減速加速度を1.0G以上で、ワー
ク表面の加工開始点以上の位置まで毎回上昇させるジャ
ンプ動作を行えば、大きなリブ溝でも、小形主軸25を
用いた放電加工と同様に効率よく放電加工を行うことが
できる。
In the case of performing the engraving electric discharge machining using a large rib electrode, the rib electrode is attached to the lower end of the spindle head 17, and a large linear motor is used as a Z axis driving means of the spindle head 17. It is also possible to perform a jump operation in the Z-axis direction. Also at this time, the feed speed is set to 40 m / mi.
When the jump operation is performed to increase the acceleration / deceleration of the feed at a speed equal to or more than the machining start point on the work surface at a speed of 1.0 G or more at n or more, the same as the electric discharge machining using the small spindle 25 even in a large rib groove. Electric discharge machining can be performed efficiently.

【0042】[0042]

【発明の効果】以上の説明から明らかなように、本発明
の形彫放電加工機においては、大形の形彫放電加工に際
しては主軸頭に取り付けた電極を用いてワークを放電加
工し、比較的小形の形彫放電加工に際しては、W軸方向
に移動する小形主軸に切り換えてワークを放電加工する
よう構成した。このため、小形の形彫放電加工に際して
は小形主軸の使用により慣性が小さく、加工屑排除のた
めのジャンプ動作の送り速度を大きくすることが容易と
なり、加工効率のよい形彫放電加工機を提供することが
できる。
As is apparent from the above description, in the die sinking electric discharge machine of the present invention, in the case of a large die sinking electric discharge machine, a workpiece is subjected to electric discharge machining using an electrode mounted on a spindle head, and a comparison is made. In the electric discharge machining of a small and small engraving, the workpiece was subjected to electric discharge machining by switching to a small main spindle moving in the W-axis direction. For this reason, the use of a small spindle reduces the inertia of small-sized sculpture electric discharge machining, making it easy to increase the feed speed of the jump operation to eliminate machining swarf. can do.

【0043】また、本発明の形彫放電加工機において
は、小形の形彫放電加工に際して慣性の小さい小形主軸
を用いてW軸方向の移動を行わせるようにしたので、位
置決めなどは従来通りのX,Y,Z軸移動を利用し、比
較的小形の形彫放電加工やそのときのジャンプ動作はW
軸方向の駆動手段を用いるので、ジャンプ動作を短時間
で行い効率のよい放電加工を行うことができる。
Further, in the die sinking electric discharge machine of the present invention, a small spindle having a small inertia is used to perform the movement in the W-axis direction at the time of the small die sinking electric discharge machining. Using the X, Y, and Z axis movement, relatively small sculpture electric discharge machining and the jump operation at that time are W
Since the driving means in the axial direction is used, the jump operation can be performed in a short time, and efficient electric discharge machining can be performed.

【0044】さらに、本発明の形彫放電加工機のジャン
プ制御を用いてワークの放電加工を行うと、電極とワー
クとの加工間隙から加工屑を確実かつ迅速に排除でき、
ワークの加工時間の短縮及び加工面品位の向上を図るこ
とができる。
Further, when the electric discharge machining of the workpiece is performed by using the jump control of the die sinking electric discharge machine of the present invention, machining waste can be reliably and rapidly eliminated from the machining gap between the electrode and the workpiece.
It is possible to shorten the processing time of the work and improve the quality of the processed surface.

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

【図1】本発明の形彫放電加工機の一実施形態を示す正
面図である。
FIG. 1 is a front view showing an embodiment of a die sinking electric discharge machine according to the present invention.

【図2】図1の側面図である。FIG. 2 is a side view of FIG.

【図3】図2のA−A断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;

【図4】図3のB−B断面図である。FIG. 4 is a sectional view taken along line BB of FIG. 3;

【図5】本発明の形彫放電加工機の別実施形態を示す正
面図である。
FIG. 5 is a front view showing another embodiment of the die sinking electric discharge machine of the present invention.

【図6】形彫放電加工機の従来例を示す正面図である。FIG. 6 is a front view showing a conventional example of a die sinking electric discharge machine.

【図7】本発明の形彫放電加工機の小形主軸を用いてワ
ークを放電加工する際の制御ブロック図である。
FIG. 7 is a control block diagram when a workpiece is subjected to electric discharge machining using a small spindle of the die sinking electric discharge machine according to the present invention.

【図8】(a)は、本発明の形彫放電加工機のジャンプ
制御を適用してジャンプ動作を行いながら放電加工を進
捗しているときの形彫加工用電極の位置を表わした図で
あり、図10(b)は、それに対応させて加工電源のオ
ン、オフ、すなわち放電加工中か放電加工休止中かを示
す加工電源の波形を表わした図である。
FIG. 8 (a) is a diagram showing the position of a die sinking electrode when the electric discharge machining is progressing while performing a jump operation by applying the jump control of the die sink electric discharge machine of the present invention. FIG. 10B is a diagram showing a waveform of the machining power supply corresponding to the ON / OFF state of the machining power supply, that is, whether the electric discharge machining is being performed or the electric discharge machining is being stopped.

【図9】(a)は、リブ電極の形状を表わした図であ
り、(b)は、従来の形彫放電加工機におけるジャンプ
制御を適用して(a)に示すようなリブ電極でワークを
放電加工したとき、または、本発明の形彫放電加工機に
おけるジャンプ制御を適用して図9(a)に示すような
リブ電極でワークを放電加工したときの実験結果を示し
た図である。
FIG. 9A is a diagram showing the shape of a rib electrode, and FIG. 9B is a diagram showing a work using a rib electrode as shown in FIG. FIG. 10 is a diagram showing an experimental result when electric discharge machining is performed on a workpiece or when a workpiece is subjected to electric discharge machining with a rib electrode as shown in FIG. 9A by applying jump control in the die sinking electric discharge machine of the present invention. .

【図10】(a)は、従来の形彫放電加工機のジャンプ
制御を適用してジャンプ動作を行いながら放電加工を進
捗しているときの形彫加工用電極の位置を表わした図で
あり、図10(b)は、それに対応させて加工電源のオ
ン、オフ、すなわち放電加工中か放電加工休止中かを示
す加工電源の波形を表わした図である。
FIG. 10A is a diagram showing the position of an electrode for engraving when the electric discharge machining is progressing while performing a jump operation by applying a jump control of a conventional engraving electric discharge machine. FIG. 10 (b) is a diagram showing the waveform of the machining power supply corresponding to the ON / OFF of the machining power supply, that is, whether the electric discharge machining is being performed or the electric discharge machining is being suspended.

【符号の説明】[Explanation of symbols]

3 ワーク 17 主軸頭 19 絶縁プレート 21 電極ホルダ 23 形彫加工用電極 25 小形主軸 27 絶縁プレート 29 電極ホルダ 31 リブ電極 33 Z軸クイル 35 Z軸レール 37 Z軸ガイド 39 W軸レール 41 マグネット 45 W軸クイル 47 W軸ガイド 49 コイル 51 小形主軸 53 リニアモータ 55 位置検出器 57 駆動制御部 59 ジャンプ制御部 61 加工電源部 3 Work 17 Spindle head 19 Insulating plate 21 Electrode holder 23 Electrode for engraving 25 Small main shaft 27 Insulating plate 29 Electrode holder 31 Rib electrode 33 Z-axis quill 35 Z-axis rail 37 Z-axis guide 39 W-axis rail 41 Magnet 45 W-axis Quill 47 W-axis guide 49 Coil 51 Small spindle 53 Linear motor 55 Position detector 57 Drive control unit 59 Jump control unit 61 Processing power supply unit

Claims (8)

【特許請求の範囲】[Claims] 【請求項1】 主軸頭に取り付けられた電極とワークと
を相対移動させて前記ワークを放電加工する形彫放電加
工機において、 前記主軸頭に、前記主軸頭の軸線方向と平行な方向へ移
動し、該移動が前記主軸頭と独立して制御可能な小形主
軸を備えることを特徴とした形彫放電加工機。
1. A die sinking electric discharge machine for performing electrical discharge machining on a workpiece by relatively moving an electrode and a workpiece attached to a spindle head, wherein the spindle head is moved in a direction parallel to an axial direction of the spindle head. And a small spindle which is capable of controlling the movement independently of the spindle head.
【請求項2】 前記小形主軸は前記主軸頭の内部に移動
可能に設けられる請求項1に記載の形彫放電加工機。
2. The die sinking electric discharge machine according to claim 1, wherein the small spindle is movably provided inside the spindle head.
【請求項3】 前記小形主軸は前記主軸頭の側面に移動
可能に設けられる請求項1に記載の形彫放電加工機。
3. The die sinking electric discharge machine according to claim 1, wherein the small spindle is movably provided on a side surface of the spindle head.
【請求項4】 前記小形主軸の送り駆動手段はリニアモ
ータで構成される請求項1から3のいずれか1項に記載
の形彫放電加工機。
4. The die sinking electric discharge machine according to claim 1, wherein the feed drive means of the small spindle is constituted by a linear motor.
【請求項5】 前記小形主軸の最大送り速度は40m/
min以上で、送りの最大加減速加速度は1.0G以上
である請求項4に記載の形彫放電加工機。
5. The maximum feed speed of the small spindle is 40 m /
The die sinking electric discharge machine according to claim 4, wherein the maximum acceleration and deceleration of the feed is 1.0 G or more at min or more.
【請求項6】 前記小形主軸にジャンプ動作を行わせる
ジャンプ制御部を備える請求項1から5のいずれか1項
に記載の形彫放電加工機。
6. The die sinking electric discharge machine according to claim 1, further comprising a jump control unit for causing the small spindle to perform a jump operation.
【請求項7】 前記ジャンプ制御部は、前記ジャンプ動
作の上昇、下降の送り速度は40m/min以上で、送
りの加減速加速度は1.0G以上で前記ジャンプ動作を
行わせる請求項6に記載の形彫放電加工機。
7. The jump control unit according to claim 6, wherein the jump control unit performs the jump operation at an ascending or descending feed speed of the jump operation of 40 m / min or more and at an acceleration or deceleration of 1.0 G or more. Die-sinker EDM.
【請求項8】 前記ジャンプ制御部は、前記ジャンプ動
作の毎回の上昇をワーク表面の加工開始点以上の位置ま
で行い、前記ジャンプ動作の上昇、下降の送り速度は4
0m/min以上で、送りの加減速加速度は1.0G以
上で前記ジャンプ動作を行わせる請求項6に記載の形彫
放電加工機。
8. The jump control section carries out the ascent of the jump operation each time to a position equal to or higher than a processing start point on the surface of the work, and a feed speed of the ascent and descent of the jump operation is 4
The die sinking electric discharge machine according to claim 6, wherein the jumping operation is performed at a feed acceleration / deceleration of 1.0 G or more at 0 m / min or more.
JP34660298A 1998-10-12 1998-11-19 Die-sinker EDM Expired - Lifetime JP3427172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34660298A JP3427172B2 (en) 1998-10-12 1998-11-19 Die-sinker EDM

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP30323698 1998-10-12
JP10-303236 1998-10-12
JP34660298A JP3427172B2 (en) 1998-10-12 1998-11-19 Die-sinker EDM

Publications (2)

Publication Number Publication Date
JP2000190131A true JP2000190131A (en) 2000-07-11
JP3427172B2 JP3427172B2 (en) 2003-07-14

Family

ID=26563457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34660298A Expired - Lifetime JP3427172B2 (en) 1998-10-12 1998-11-19 Die-sinker EDM

Country Status (1)

Country Link
JP (1) JP3427172B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001003871A1 (en) * 1999-07-08 2001-01-18 Sodick Co., Ltd. Apparatus for electrodischarge machining
JP2006224258A (en) * 2005-02-18 2006-08-31 Sodick Co Ltd Diesinking electric discharge machine
JP2007229881A (en) * 2006-03-02 2007-09-13 Makino Milling Mach Co Ltd Electric discharge machine
US9346113B1 (en) 2015-03-19 2016-05-24 Johnson Technology, Inc. Electrical discharge machining integrated control system
JP2016137545A (en) * 2015-01-28 2016-08-04 株式会社エレニックス Small hole electric discharge machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001003871A1 (en) * 1999-07-08 2001-01-18 Sodick Co., Ltd. Apparatus for electrodischarge machining
US6459063B1 (en) 1999-07-08 2002-10-01 Sodick Co., Ltd. Apparatus for electrodischarge machining
JP2006224258A (en) * 2005-02-18 2006-08-31 Sodick Co Ltd Diesinking electric discharge machine
JP4721325B2 (en) * 2005-02-18 2011-07-13 株式会社ソディック Die-sinker EDM
JP2007229881A (en) * 2006-03-02 2007-09-13 Makino Milling Mach Co Ltd Electric discharge machine
JP2016137545A (en) * 2015-01-28 2016-08-04 株式会社エレニックス Small hole electric discharge machine
US9346113B1 (en) 2015-03-19 2016-05-24 Johnson Technology, Inc. Electrical discharge machining integrated control system

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