JPH0227090B2 - - Google Patents
Info
- Publication number
- JPH0227090B2 JPH0227090B2 JP58160661A JP16066183A JPH0227090B2 JP H0227090 B2 JPH0227090 B2 JP H0227090B2 JP 58160661 A JP58160661 A JP 58160661A JP 16066183 A JP16066183 A JP 16066183A JP H0227090 B2 JPH0227090 B2 JP H0227090B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- holding device
- piston
- electrode holding
- drive
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 20
- 238000009760 electrical discharge machining Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 description 15
- 230000003068 static effect Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、放電加工装置の改良に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to improvements in electric discharge machining equipment.
従来の放電加工装置の電極保持装置についてそ
の概略を第１図を用いて説明する。即ち、図にお
ける１は主軸、２は下面に断面Ｖ字形でかつそれ
が十字に交わる凸部を有する位置決めフランジ、
３は電極保持装置で、その上面に位置決めフラン
ジ２の下面凸部に雄雌の係合形状を成す溝と、軸
心位置に備えたプルスタツドボルト４を有し、か
つ下面に電極取付面５を有している。６は駆動軸
で、皿ばね等の押圧体７により常時上方へ押上げ
られている。８は駆動軸６の下端部に設けられて
いる案内空胴部で、プルスタツドボルト４の先端
部がここに挿入される。９は駆動軸６の軸心に対
して直角方向に移動可能に保持されている鋼球、
１０は外部ピストンで、そのピストンロツドは駆
動軸６の上端部に対向せしめてある。
An outline of a conventional electrode holding device for an electric discharge machining apparatus will be explained using FIG. That is, in the figure, 1 is a main shaft, 2 is a positioning flange having a V-shaped cross section on the lower surface and a convex portion that intersects with a cross;
Reference numeral 3 denotes an electrode holding device, which has a groove on its upper surface that forms a male and female engagement shape on the convex portion of the lower surface of the positioning flange 2, and a pull stud bolt 4 provided at the axial center position, and an electrode mounting surface 5 on its lower surface. have. Reference numeral 6 denotes a drive shaft, which is constantly pushed upward by a pressing member 7 such as a disc spring. 8 is a guide cavity provided at the lower end of the drive shaft 6, into which the tip of the pull stud bolt 4 is inserted. 9 is a steel ball held movably in a direction perpendicular to the axis of the drive shaft 6;
10 is an external piston, the piston rod of which is opposed to the upper end of the drive shaft 6.
以上の構成による従来の放電加工装置の電極保
持装置の動作について説明する。先ず外部ピスト
ン１０は系外から送られる作動流体の作用により
前進する。さらに前進すると駆動軸６に接触し、
次いで押圧体７を圧縮変位させる。このようにし
て外部ピストン１０がストロークエンドまで下降
すると、鋼球９は押下げられて外方へ移動可能と
なり、この状態で電極ホルダー３の装置待機とな
る。次に、電極ホルダー３を装着すると、そのプ
ルスタツドボルト４の先端部が鋼球９を外方へ押
しやり案内空胴部８へ進入する。次いで系外から
送られる作動流体の作動により外部ピストン１０
が後退を開始すると、駆動軸６は圧力スプリング
７の弾発作用により上方へ押上げられる。この外
部ピストン１０の上方への移動に伴い、鋼球９は
位置決めフランジ２の内面のテーパー面１１に沿
つて軸心方向へ移動し、プルスタツドボルト４の
先端部とも係合してその抜出しを拘束すると共
に、併せて電極ホルダー３が上昇して位置決めフ
ランジ２のＶ字形凸部の位置決め面が相互に接合
して位置決めが完了する。同時にプルスタツドボ
ルト４は常時加圧スプリング７により上方へ引上
げられてクランプ状態を維持する。 The operation of the conventional electrode holding device of the electrical discharge machining apparatus having the above configuration will be explained. First, the external piston 10 moves forward by the action of working fluid sent from outside the system. As it moves further forward, it comes into contact with the drive shaft 6,
Next, the pressing body 7 is compressed and displaced. When the external piston 10 descends to the stroke end in this manner, the steel ball 9 is pushed down and becomes movable outward, and in this state the electrode holder 3 is on standby for the device. Next, when the electrode holder 3 is attached, the tip of the pull stud bolt 4 pushes the steel ball 9 outward and enters the guide cavity 8. Next, the external piston 10 is activated by the working fluid sent from outside the system.
When the drive shaft 6 starts to retreat, the drive shaft 6 is pushed upward by the spring action of the pressure spring 7. As the external piston 10 moves upward, the steel ball 9 moves in the axial direction along the tapered surface 11 on the inner surface of the positioning flange 2, and also engages with the tip of the pull stud bolt 4 to prevent its removal. At the same time, the electrode holder 3 rises and the positioning surfaces of the V-shaped protrusions of the positioning flange 2 are joined to each other, completing the positioning. At the same time, the pull stud bolt 4 is constantly pulled upward by the pressure spring 7 to maintain the clamped state.
このような構成の従来の放電加工装置は、位置
決めフランジ２及び電極ホルダー３の位置決め接
合の構造が複雑で、高精度加工の必要なＶ字形の
基準面を設ける必要があり、特にその交点精度を
向上させることは加工技術上限界がある。そのた
め、電極相互間の芯（Ｘ−Ｙ，Ｚ軸方向）が一致
し難いという欠点があつた。又、クランプ力が加
圧スプリング７の弾発力のみであり、構造上のス
ペース制限及びプルスタツドボルト４の強度上の
制約から、大きな値に設定することは不可能で、
放電加工中主軸の上下運動に伴う電極、被加工物
間に介在する加工液圧の変動（吸引、加圧）によ
り、電極ホルダー３が位置ずれを生じる欠点があ
つた。更に、大型でかつ重量電極の場合、その電
極の自重によつて加圧スプリング７が圧縮変位し
てしまつて、クランプ及び位置決めが不可能とな
ることもある。 Conventional electric discharge machining equipment with such a configuration has a complicated positioning joint structure between the positioning flange 2 and the electrode holder 3, and it is necessary to provide a V-shaped reference surface that requires high-precision machining. There are limits to how much it can be improved due to processing technology. Therefore, there was a drawback that the centers of the electrodes (X-Y, Z-axis directions) were difficult to match. In addition, the clamping force is only the elastic force of the pressure spring 7, and it is impossible to set it to a large value due to structural space limitations and strength limitations of the pull stud bolt 4.
There is a drawback that the electrode holder 3 may be misaligned due to fluctuations in machining fluid pressure (suction, pressurization) interposed between the electrode and the workpiece due to the vertical movement of the spindle during electrical discharge machining. Furthermore, in the case of a large and heavy electrode, the pressure spring 7 may be compressed and displaced by the electrode's own weight, making clamping and positioning impossible.
本発明は、上述の如き従来の放電加工装置の欠
点を改善するためになされたもので、電極の取付
けられる下面が短辺をなす断面台形の電極保持手
段と、この電極保持手段の両側部と係合する凹部
を下面に有し、かつこの凹部の一側部が電極の軸
方向に対して直角方向に移動する押圧ブロツクを
形成すると共に、上部が主軸に固定されている電
極クランプ装置と、前記押圧ブロツクを作動流体
により移動させる被駆動ピストンの背部の一側に
駆動ピストンを有する押圧装置と、この押圧装置
と一体をなし、作動時には加圧スプリングにより
前記駆動ピストンを押圧し、非作動時には前記駆
動ピストンを後退させる駆動軸を有する駆動装置
を具備する放電加工装置を提供するものである。
The present invention was made in order to improve the drawbacks of the conventional electric discharge machining apparatus as described above, and includes an electrode holding means having a trapezoidal cross section whose short side is the lower surface on which the electrode is attached, and both sides of the electrode holding means. an electrode clamp device having an engaging recess on the lower surface, one side of the recess forming a pressing block that moves in a direction perpendicular to the axial direction of the electrode, and an upper part fixed to a main shaft; A pressing device having a driving piston on one side of the back of a driven piston that moves the pressing block by a working fluid; and a pressing device which is integrated with this pressing device and presses the driving piston by a pressurizing spring when activated, and when not activated. The present invention provides an electric discharge machining apparatus including a drive device having a drive shaft for retracting the drive piston.
以下、本発明の一実施例について第２図〜第７
図に基づいて説明する。第２図〜第７図におい
て、１は主軸、３は断面台形の電極保持装置で、
その断面台形の短辺をなす下面が電極取付面５で
あり、この電極取付面５と長辺をなす上面との間
で形成される両側はひれ形部分３ａ，３ｂを形成
している。１２は主軸１に固定された電極クラン
プ装置で、電極保持装置３を装着するための凹部
案内１３を持つ。この凹部案内１３は、電極保持
装置３の上面両側のひれ形部分３ａ，３ｂに雄雌
の係合を成す構造になつている。この場合凹部案
内１３の内面には位置決め面１４ａ，１４ｂ，１
４ｃ，１４ｄを設ける。さらに、この電極クラン
プ装置１２は凹部１３の一側が電極の軸方向に対
して直角方向に移動して係合、離脱が図れるよう
に別体の押圧ブロツク１５が形成されている。こ
の押圧ブロツク１５には、その先端に電極保持装
置３のひれ形部分３ｂと係合する凹形接合面１５
ａが設けてある。またこの押圧ブロツク１５は、
加圧スプリング１７を介在させた複数本の支承軸
１６によつて電極クランプ装置１２本体に支承さ
れていて、進退移動が円滑に行われるようになつ
ている。１８は被駆動ピストンで、押圧装置２２
の系内に貯えられた作動流体１９で後述する駆動
ピストン２０の前進により加圧されて第２図、第
３図の左方へ移動し、これにより押圧ブロツク１
５が前進して電極保持装置３と係合する。駆動ピ
ストン２０は、押圧装置２２と一体の駆動装置２
１の駆動軸６が加圧スプリング７により常時下方
に押下げられていてこの押下げられた状態のとき
に、その先端部が接触することによつて前進させ
られる。なお、駆動軸６は系外から送られる作動
流体が駆動装置２１の室２３に入ることにより後
退する。１０は駆動装置２１の外部ピストンであ
り駆動軸６に係合している。２４は系外の空・油
圧変換器で、大ピストン２４ａが電磁弁２６の開
動作により前進すると、これに連結した小ピスト
ン２４ｂは作動流体を加圧供給し、管路２５を介
して室２３へ導く。室２３の作動流体の静圧は上
昇し、外部ピストン１０を持ち上げるとこれに係
合した駆動軸６は加圧スプリング７の圧縮変位に
より後退する。また、電磁弁２６が閉動作を行う
と、大ピストン２４ａは後退し室２３の静圧は低
下し、駆動軸６は加圧スプリング７の伸長変位に
より前進する。なお、２７はストツパーであり、
電極保持装置３の進入方向の規制を行う。
Hereinafter, one embodiment of the present invention will be explained in Figures 2 to 7.
This will be explained based on the diagram. In Figures 2 to 7, 1 is a main shaft, 3 is an electrode holding device with a trapezoidal cross section,
The lower surface forming the short side of the trapezoidal cross section is the electrode mounting surface 5, and both sides formed between the electrode mounting surface 5 and the upper surface forming the long side form fin-shaped portions 3a and 3b. Reference numeral 12 denotes an electrode clamping device fixed to the main shaft 1, which has a recess guide 13 for mounting the electrode holding device 3 thereon. The recessed guide 13 is configured to engage male and female fin-shaped portions 3a and 3b on both sides of the upper surface of the electrode holding device 3. In this case, the inner surface of the recess guide 13 has positioning surfaces 14a, 14b, 1
4c and 14d are provided. Furthermore, this electrode clamping device 12 is formed with a separate pressing block 15 so that one side of the recess 13 can be moved in a direction perpendicular to the axial direction of the electrode to engage and disengage. This pressing block 15 has a concave joint surface 15 at its tip that engages with the fin-shaped portion 3b of the electrode holding device 3.
A is provided. Moreover, this pressing block 15 is
The electrode clamp device 12 is supported by the main body of the electrode clamp device 12 by a plurality of support shafts 16 with pressure springs 17 interposed therebetween, so that the electrode clamp device 12 can be smoothly moved forward and backward. 18 is a driven piston, and a pressing device 22
The working fluid 19 stored in the system is pressurized by the advancement of the drive piston 20, which will be described later, and moves to the left in FIGS.
5 moves forward and engages with the electrode holding device 3. The driving piston 20 is a driving device 2 integrated with a pressing device 22.
The first drive shaft 6 is constantly pushed down by the pressure spring 7, and when in this pushed down state, the tip ends of the drive shafts 6 come into contact with each other and are moved forward. Note that the drive shaft 6 moves backward when working fluid sent from outside the system enters the chamber 23 of the drive device 21. 10 is an external piston of the drive device 21 and is engaged with the drive shaft 6. 24 is a pneumatic/hydraulic converter outside the system, and when the large piston 24a moves forward due to the opening operation of the solenoid valve 26, the small piston 24b connected thereto pressurizes and supplies working fluid to the chamber 23 through the pipe line 25. lead to. The static pressure of the working fluid in the chamber 23 increases, and when the external piston 10 is lifted, the drive shaft 6 engaged therewith is moved back due to the compressive displacement of the pressurizing spring 7. Further, when the electromagnetic valve 26 performs a closing operation, the large piston 24a retreats, the static pressure in the chamber 23 decreases, and the drive shaft 6 moves forward due to the expansion displacement of the pressurizing spring 7. In addition, 27 is a stopper,
The direction in which the electrode holding device 3 enters is regulated.
ところで、被駆動ピストン１８の受圧面積A1
を駆動ピストン２０のシリンダー断面積A2より
大きく設定しておくことはこの場合必要であり、
その理由は、加圧スプリング７の伸長変位より生
じる押圧力を可能な限り大きなクランプ力として
作用させるためで、この増力機構により電極保持
装置３のクランプ力を十分高くすることができ
る。 By the way, the pressure receiving area A 1 of the driven piston 18
In this case, it is necessary to set A2 to be larger than the cylinder cross-sectional area A2 of the drive piston 20,
The reason for this is that the pressing force generated by the expansion displacement of the pressure spring 7 is made to act as a clamping force as large as possible, and the clamping force of the electrode holding device 3 can be made sufficiently high by this force increasing mechanism.
又、３０は位置決め面１４ａ，１４ｃ，１４ｄ
に設けられた空気孔で、管路３１を通じて電磁弁
３２に連結している。これは電極保持装置３及び
電極クランプ装置１２の位置決め面に付着したゴ
ミ等をエアー圧で吹き飛ばすためである。３３は
ストツパー２７に固定された接続軸で、その先端
はテーパ面を有するとともにＯリング３４を具備
する。３３ａは接続軸３３を貫通する管路、３ｃ
は接続軸３３に係合する電極保持装置３に設けら
れた接続口で、管路３ａ，３ｂに通じる。なお、
Ｏリング３４は電極保持装置３がストツパー２７
に接触した状態で接続口３ｃの内面に係合し加工
液の外部流出を防ぐ。 Further, 30 indicates positioning surfaces 14a, 14c, 14d.
The air hole is connected to a solenoid valve 32 through a conduit 31. This is to blow away dust and the like adhering to the positioning surfaces of the electrode holding device 3 and electrode clamping device 12 using air pressure. Reference numeral 33 denotes a connecting shaft fixed to the stopper 27, the tip of which has a tapered surface and is equipped with an O-ring 34. 33a is a conduit passing through the connecting shaft 33, 3c
is a connection port provided in the electrode holding device 3 that engages with the connection shaft 33 and communicates with the pipe lines 3a and 3b. In addition,
The O-ring 34 is connected to the electrode holding device 3 by the stopper 27.
It engages with the inner surface of the connection port 3c while in contact with the connection port 3c to prevent the machining fluid from flowing out.
次にその動作について説明する。先ず、電極保
持装置３は電極クランプ装置１２に挿入されてお
らず、アンクランプ状態にあるものと仮定する。
この状態では電磁弁２６は励磁されて大ピストン
２４ａは前進している。この状態で電極が取付け
られた電極保持装置３を、電極クランプ装置１２
の凹部案内１３へ装着する。但し、電極保持装置
３は作業者の手等により軽くストツパー２７に当
てられているものとする。電極クランプ装置１
２、電極保持装置３の各位置決め面のエアーブロ
ーは電極保持装置３の挿入時行われる。この場合
必要な時間電磁弁３２が動作することにより行わ
れる。続いて電磁弁２６をOFFとすると、ピス
トン２４ａは後退し小ピストン２４ｂも同時に後
退する。室２３の静圧は低下し、それとともに加
圧クランプ７が伸長する。この結果駆動軸６は押
され、駆動ピストン２０を押圧する。この押圧力
は作動流体１９の静圧上昇を招く、作動流体１９
の静圧上昇と共に被駆動ピストン１８は前進し
て、押圧ブロツク１５を押し続ける。押圧ブロツ
ク１５のひれ形部分１５ａは、電極保持装置３の
凸形のひれ形部分３ｂと接触係合して電極ホルダ
ー３を押す。この押圧作用により電極保持装置３
は凹部案内１３を形成する位置決め面１４ａ，１
４ｂ，１４ｃ，１４ｄに完全に密着し、その状態
を維持することになる。このようにしてクランプ
及び位置決め動作を完了する。 Next, its operation will be explained. First, it is assumed that the electrode holding device 3 is not inserted into the electrode clamping device 12 and is in an unclamped state.
In this state, the solenoid valve 26 is energized and the large piston 24a is moving forward. In this state, the electrode holding device 3 with the electrode attached is moved to the electrode clamping device 12.
Attach it to the recess guide 13 of. However, it is assumed that the electrode holding device 3 is lightly applied to the stopper 27 by the operator's hand or the like. Electrode clamp device 1
2. Air blowing of each positioning surface of the electrode holding device 3 is performed when the electrode holding device 3 is inserted. In this case, this is done by operating the solenoid valve 32 for the required time. Subsequently, when the solenoid valve 26 is turned off, the piston 24a retreats and the small piston 24b also retreats at the same time. The static pressure in the chamber 23 decreases and the pressure clamp 7 extends accordingly. As a result, the drive shaft 6 is pushed and presses the drive piston 20. This pressing force causes an increase in the static pressure of the working fluid 19.
As the static pressure increases, the driven piston 18 moves forward and continues to push the pressing block 15. The fin-shaped portion 15a of the pressing block 15 contacts and engages the convex fin-shaped portion 3b of the electrode holding device 3 to press the electrode holder 3. Due to this pressing action, the electrode holding device 3
is the positioning surface 14a, 1 forming the recess guide 13.
4b, 14c, and 14d, and maintains that state. In this way, the clamping and positioning operations are completed.
次に、アンクランプ動作について説明する。電
磁弁２６がONすると大ピストン２４ａは前進
し、それと同時に小ピストン２４ｂも前進するた
め室２３の作動流体は加圧されて静圧は上昇す
る。これと同時に外部ピストン１０は持ち上げら
れ、駆動軸６は加圧スプリング７を圧縮変位せし
める。このため作動流体１９の静圧は低下し被駆
動ピストン１８は押圧力を失う。これによつて押
圧ブロツク１５は加圧スプリング１７の弾発作用
により後退する。後退と同時に電極保持装置３は
凹部案内１３の位置決め面１４ａ，１４ｂ，１４
ｃ，１４ｄから離脱する。しかしながら、電極保
持装置３のひれ形部分３ａ，３ｂと凹部案内１３
雄雌の係合関係を持ついわゆるダブテール形を成
すため、クランプが解放され押圧ブロツク１５が
後退しても凹部案内１３の位置決め面１４ａ，１
４ｂにより支えられるので落下しない。従つて、
電極保持装置３の挿入作業とクランプ、アンクラ
ンプ動作とは全く独立して行うこととができる。 Next, the unclamping operation will be explained. When the solenoid valve 26 is turned on, the large piston 24a moves forward, and at the same time, the small piston 24b also moves forward, so that the working fluid in the chamber 23 is pressurized and the static pressure increases. At the same time, the external piston 10 is lifted, and the drive shaft 6 compresses and displaces the pressurizing spring 7. Therefore, the static pressure of the working fluid 19 decreases and the driven piston 18 loses its pressing force. As a result, the pressing block 15 is moved back due to the spring force of the pressing spring 17. At the same time as the electrode holding device 3 is retracted, the positioning surfaces 14a, 14b, 14 of the recess guide 13
c, leave from 14d. However, the fin-shaped portions 3a, 3b of the electrode holding device 3 and the recess guide 13
Since it forms a so-called dovetail shape with a male-female engagement relationship, even if the clamp is released and the pressing block 15 is retreated, the positioning surfaces 14a, 1 of the recess guide 13
It will not fall because it is supported by 4b. Therefore,
The insertion operation of the electrode holding device 3 and the clamping and unclamping operations can be performed completely independently.
なお、押圧ブロツク１５には電極保持装置３の
挿入方向に比較的長い形状を成しているが、被駆
動ピストン１８の押圧点を中央に設定することに
より、均等にクランプ力を伝達することが可能で
ある。 Although the pressing block 15 has a relatively long shape in the insertion direction of the electrode holding device 3, by setting the pressing point of the driven piston 18 at the center, the clamping force can be evenly transmitted. It is possible.
さらに、第４図に示す如く押圧ブロツク１５の
ひれ形部分１５ａの中央付近に凹部１５ｂ，１５
ｃを設けることにより、均等なクランプ力で電極
保持装置３を位置決めすることが可能となる。 Furthermore, as shown in FIG.
By providing c, it becomes possible to position the electrode holding device 3 with uniform clamping force.
また電極保持装置３が電極クランプ装置１２に
挿入されてストツパー２７に当たつた状態で接続
軸３３は接続口３ｃ内部にはまり込みＯリング３
４でシールされる。電極保持装置３のクランプ動
作完了後加工液供給装置より加工液が供給され管
路３３ａ，３３ｂ，３ｃを通じて電極へ供給され
る。この場、管路はＯリング３４でシールされる
ため加工液の外部流出はなくそのため加工液が電
極保持装置３の位置決め面に付着することもな
い。また電極保持装置３がアンクランプ状態とな
り電極クランプ装置１２から外される場合にも接
続軸３３内部に残留する加工液が滴下してもスト
ツパー２７の中央位置に設けてあるため真下に落
ちるのみで位置決め面１４ａ，１４ｂ，１４ｃ，
１４ｄには触れない。 Further, when the electrode holding device 3 is inserted into the electrode clamping device 12 and hits the stopper 27, the connecting shaft 33 fits inside the connecting port 3c and the O-ring 3
It is sealed with 4. After the clamping operation of the electrode holding device 3 is completed, the machining fluid is supplied from the machining fluid supply device and is supplied to the electrodes through the conduits 33a, 33b, and 3c. At this point, the conduit is sealed with an O-ring 34, so the machining fluid does not leak out to the outside, and therefore the machining fluid does not adhere to the positioning surface of the electrode holding device 3. Further, even if the electrode holding device 3 is unclamped and removed from the electrode clamping device 12, even if the machining fluid remaining inside the connecting shaft 33 drips, it will only fall straight down because it is provided at the center of the stopper 27. Positioning surfaces 14a, 14b, 14c,
Do not touch 14d.
なお、第５図に示す接続軸３３及びび接続口３
ｃの関係は固定となつているが工作上の精度を考
えた場合は第６図〜第７図に示す構造が有利と考
える。第６図〜第７図において３５は球面軸受で
接続軸３３をストツパー２７に対して調心自在に
支承しており自由度があるため、接続口３ｃの位
置が偏心していても十分なかん合を得ることがで
きる。つまり、電極保持装置３はクランプ前とク
ランプ後では多少の変位を生じるため、その移動
量を吸収して電極保持装置３の挿入を容易にする
ものである。第７図は他の実施例を示すもので接
続軸３３を薄板状のばね３６等で支持することに
より同等の効果を出す様にしたものである。 Note that the connection shaft 33 and connection port 3 shown in FIG.
Although the relationship c is fixed, when considering the precision of workmanship, the structure shown in FIGS. 6 and 7 is considered to be advantageous. In FIGS. 6 and 7, 35 is a spherical bearing that supports the connecting shaft 33 so that it can be centered with respect to the stopper 27, and has a degree of freedom, so even if the position of the connecting port 3c is eccentric, sufficient mating can be achieved. can be obtained. In other words, since the electrode holding device 3 undergoes some displacement before and after clamping, the amount of displacement is absorbed to facilitate insertion of the electrode holding device 3. FIG. 7 shows another embodiment in which the connecting shaft 33 is supported by a thin plate-shaped spring 36 or the like to achieve the same effect.
以上のように、本発明の放電加工装置は、電極
保持装置を薄板状の雄形ダブテール構造とし、そ
れを位置決めクランプする電極クランプ装置を電
極保持装置に雄雌の係合関係を有する凹部案内を
設けて位置決め面を形成すると共に、静圧作用に
よる増巾機構にてクランプ力を発生せしめるよう
にした構成なので、大型重量電極のクランプ、位
置決めが容易である。又、電極保持装置、電極ク
ランプ装置の位置決め面形状が簡単な形状になり
コスト的に安価にできる。
As described above, in the electrical discharge machining apparatus of the present invention, the electrode holding device has a thin male dovetail structure, and the electrode clamping device for positioning and clamping the electrode holding device is provided with a recess guide having a male and female engagement relationship. Since the structure is such that a positioning surface is formed and a clamping force is generated by a width increasing mechanism using static pressure, it is easy to clamp and position a large heavy electrode. In addition, the positioning surfaces of the electrode holding device and the electrode clamping device have a simple shape, and the cost can be reduced.
第１図は従来の放電加工装置の電極保持装置及
び電極クランプ装置を示す断面図、第２図は本発
明の放電加工装置の一実施例の電極保持装置及び
電極クランプとその作動流体の送入系を示す断面
図、第３図は第２図の―線矢視図、第４図は
本発明装置における押圧ブロツクのさらに一つの
実施例を示す斜視図である。第５図は第３図のＶ
―Ｖ矢視図、第６図、第７図は接続軸支承の他の
応用例を示す断面図である。
図において１は主軸、３は電極保持装置、３
ａ，３ｂはひれ形部分、５は電極取付面、１２は
電極クランプ装置、１４は位置決め面、１４ａ，
１４ｂ，１４ｃ，１４ｄは接合面、１５は押圧ブ
ロツク、１８は被駆動ピストン、１９は作動流
体、２０は駆動ピストン、２１は駆動装置、２２
は押圧装置である。なお、図中同一符号は同一又
は相当部分を示す。
FIG. 1 is a cross-sectional view showing an electrode holding device and an electrode clamping device of a conventional electric discharge machining device, and FIG. 2 is a cross-sectional view showing an electrode holding device and an electrode clamp of an embodiment of the electric discharge machining device of the present invention, and the supply of working fluid therefor. FIG. 3 is a cross-sectional view showing the system, FIG. 3 is a view taken along the line shown in FIG. 2, and FIG. 4 is a perspective view showing yet another embodiment of the pressing block in the apparatus of the present invention. Figure 5 shows V in Figure 3.
- V arrow view, FIGS. 6 and 7 are cross-sectional views showing other application examples of the connecting shaft support. In the figure, 1 is the main shaft, 3 is the electrode holding device, 3
a, 3b are fin-shaped parts, 5 is an electrode mounting surface, 12 is an electrode clamp device, 14 is a positioning surface, 14a,
14b, 14c, 14d are joint surfaces, 15 is a pressing block, 18 is a driven piston, 19 is a working fluid, 20 is a driving piston, 21 is a driving device, 22
is a pressing device. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
形の電極保持装置と、この電極保持装置の両側部
と係合する凹部を下面に有し、かつこの凹部の一
側部が電極の軸方向に対して直角方向に移動する
押圧ブロツクを形成すると共に、上部が主軸に固
定されている電極クランプ装置と、前記押圧ブロ
ツクを作動流体により移動させる被駆動ピストン
の背部の一側に駆動ピストンを有する押圧装置
と、この押圧装置と一体をなし、作動時には加圧
スプリングにより前記駆動ピストンを押圧し、非
作動時には前記駆動ピストンを後退させる駆動軸
を有する駆動装置を具備する放電加工装置。1. An electrode holding device having a trapezoidal cross section whose short side is the lower surface on which the electrode is attached, and a recessed portion on the lower surface that engages with both sides of the electrode holding device, and one side of this recessed portion extends in the axial direction of the electrode. a press block forming a press block that moves in a direction perpendicular to the press block and having an electrode clamping device whose upper part is fixed to the main shaft; and a drive piston on one side of the back of a driven piston that moves the press block by means of a working fluid. An electrical discharge machining device comprising: a device; and a drive device that is integrated with the pressing device and has a drive shaft that presses the drive piston with a pressurizing spring when activated, and retracts the drive piston when it is not activated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16066183A JPS6052225A (en) | 1983-09-01 | 1983-09-01 | Electric discharge machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16066183A JPS6052225A (en) | 1983-09-01 | 1983-09-01 | Electric discharge machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6052225A JPS6052225A (en) | 1985-03-25 |
| JPH0227090B2 true JPH0227090B2 (en) | 1990-06-14 |
Family
ID=15719756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16066183A Granted JPS6052225A (en) | 1983-09-01 | 1983-09-01 | Electric discharge machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052225A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324395A (en) * | 1989-06-20 | 1991-02-01 | Nissan Motor Co Ltd | Hose clamp |
| JPH0463887U (en) * | 1990-10-13 | 1992-05-29 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251016A (en) * | 1986-04-22 | 1987-10-31 | Japax Inc | Electric discharge machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5294833A (en) * | 1976-02-04 | 1977-08-09 | Mitsubishi Electric Corp | Electrolytic processing apparatus |
-
1983
- 1983-09-01 JP JP16066183A patent/JPS6052225A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5294833A (en) * | 1976-02-04 | 1977-08-09 | Mitsubishi Electric Corp | Electrolytic processing apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324395A (en) * | 1989-06-20 | 1991-02-01 | Nissan Motor Co Ltd | Hose clamp |
| JPH0463887U (en) * | 1990-10-13 | 1992-05-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6052225A (en) | 1985-03-25 |
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