JPS5993234A - Electrode supporting device in electric discharge machine - Google Patents

Electrode supporting device in electric discharge machine

Info

Publication number
JPS5993234A
JPS5993234A JP19974282A JP19974282A JPS5993234A JP S5993234 A JPS5993234 A JP S5993234A JP 19974282 A JP19974282 A JP 19974282A JP 19974282 A JP19974282 A JP 19974282A JP S5993234 A JPS5993234 A JP S5993234A
Authority
JP
Japan
Prior art keywords
electrode
machining
electrode holder
discharge machine
electric discharge
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
JP19974282A
Other languages
Japanese (ja)
Inventor
Yoshihiko Ono
善彦 小野
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.)
Tokiwa Seiki Ind Co Ltd
Original Assignee
Tokiwa Seiki Ind 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
Publication date
Application filed by Tokiwa Seiki Ind Co Ltd filed Critical Tokiwa Seiki Ind Co Ltd
Priority to JP19974282A priority Critical patent/JPS5993234A/en
Publication of JPS5993234A publication Critical patent/JPS5993234A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H7/00Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/26Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • B23H7/28Moving electrode in a plane normal to the feed direction, e.g. orbiting

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)

Abstract

PURPOSE:To enable finishing work to be performed by the same electrode after its roughing work, by eccentrically relocating a fine distance an electrode holder of an electric discharge machine from the center and enabling the electrode to be revolved around the center in a horizontal surface. CONSTITUTION:A housing 3 of an electrode supporting device 1 is mounted to the bottom face of a ram R performing vertical motion of an electric discharge machine, further, an electrode holder 13 is supported by balls 27 finely movably in a horizontal surface. A pulley 33 is provided rotatably on a fixed shaft 29 fixed to the housing 3, while an eccentrically movable sliding member 37 is mounted to this pulley 33. A bearing 45 provided in the sliding member 37 is engaged with a protruding shaft 43 fixed to the electrode holder. After roughing work with an electrode 15 being fixed by an electrode fixing pin 51, the fixing pin is removed, and the pulley 33 is rotated to be driven by eccentrically relocating the sliding member 37 in a prescribed distance from the center, thus the electrode 15 is given the motion to revolve around the center with a fine radius to perform finishing work.

Description

【発明の詳細な説明】 本発明は放電加工機における電極支持装置に係るもので
あり、さらに詳細には、加工電極を支持する電極ホルダ
を水平方向に微動自在に設けてなる電極支持装置に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode support device for an electric discharge machine, and more particularly to an electrode support device in which an electrode holder for supporting a machining electrode is provided in a horizontally movable manner. It is.

放電加工機においては、加工能率を向上するために、電
気的には印加するパルスのデユーティファクターを大き
くして平均加工電流を増加する方法等を採られるのが一
般的である。機械的には、パルスの電圧を高くして被加
工材〈ワーク)に対する加工電極の荒送りを行なってい
るのが一般的である。このように荒送りによる放電加工
は加工能率が向上するものの、加工面が荒いために、!
(ルス電圧を適宜に調節すると共に仕上加工用の電極を
用いて仕上加工を再度行なう必要がある。すなわち、こ
の場合には、荒加工用と仕上加工用の電極を用意しなけ
ればならない問題がある。他方、加工面の仕上ti度を
良くするために、ワーイ7に対する加工電極の送りを最
初から微小送りにする場合には加工能率が極めて悪いと
いう問題がある。
In electric discharge machines, in order to improve machining efficiency, it is common to use methods such as increasing the average machining current by increasing the duty factor of electrically applied pulses. Mechanically, it is common to roughly feed the machining electrode relative to the workpiece by increasing the pulse voltage. Although electrical discharge machining using rough feed improves machining efficiency, the machining surface is rough!
(It is necessary to adjust the pulse voltage appropriately and perform finishing machining again using the electrode for finishing machining.In other words, in this case, there is the problem of having to prepare electrodes for rough machining and for finishing machining. On the other hand, in order to improve the degree of finishing of the machined surface, if the machining electrode is fed by a minute feed from the beginning with respect to the workpiece 7, there is a problem that the machining efficiency is extremely poor.

本発明は上記のごとき従来の問題に鑑み発明したもので
、加工電極を水平方向に微振動せしめつつ放電加工を行
なうことにより、加工能率の向上および仕上li度の向
上を図るものである。
The present invention was invented in view of the above-mentioned conventional problems, and aims to improve machining efficiency and finish quality by performing electrical discharge machining while slightly vibrating the machining electrode in the horizontal direction.

以下、図面を用いて本発明の1実施例について詳細な説
明を行なう。
Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

本発明に係る電極支持装置1におけるハウジング3の下
端縁には水平なフランジ5が一体に形成してあり、上端
部にはシャンク部7が形成しである。上記ハウジング3
は前記シャンク部7を介することにより放電加工機にお
ける上下動自在のラムRに着脱自在に装着しであるもの
である。前記フランジ5の下面には環状のスペーサ9を
間にして比較的幅広の環状の支持プレート11がボルト
等により一体的に取付けてあり、この支持プレート11
に電極ホルダ13が水平なあらゆる方向へ微動自在、か
つ回動自在に支持されているものである。
In the electrode support device 1 according to the present invention, a horizontal flange 5 is integrally formed at the lower edge of the housing 3, and a shank portion 7 is formed at the upper end. Housing 3 above
is detachably attached to a vertically movable ram R in an electrical discharge machine via the shank portion 7. A relatively wide annular support plate 11 is integrally attached to the lower surface of the flange 5 with an annular spacer 9 in between, using bolts or the like.
The electrode holder 13 is supported so as to be able to move slightly and rotate in all horizontal directions.

前記電極ホルダ13は加工電極15を着脱交換自在に装
着する着脱孔17を備えると共に、前記支持プレート1
1と同径のフランジ部13Fを備えている。この電極ホ
ルダ13の上面中央部に一体に固定した一体軸19は前
記支持プレート11の中央部に位置し、この一体軸19
には支持プレー )−11の内周面11aと当接自在の
ベアリング21が取付けである。また、一体軸19の上
端部には、支持プレート11の内周面11aの径よりも
大径の円板状のスライド板23がボルト等により一体的
に固定しである。このスライド板23の下面と前記支持
プ°レート11の上面との間には、環状のリテーナ25
に回転自在に保持された多数のボール27が介在しであ
る。さらに前記電極ホルダ13におけるフランジ部13
Fの上面と支持プレート11の下面との間にも同様のリ
テーナ25、ボール27が介在しである。したがって電
極ボルダ13は上下方向の移動は規制されているものの
、水平なあらゆる方向への移動及び回転は極めて円滑に
行ない得るものである。
The electrode holder 13 has an attachment/detachment hole 17 into which the machining electrode 15 is attached detachably and replaceably, and the support plate 1
A flange portion 13F having the same diameter as 1 is provided. An integral shaft 19 integrally fixed to the center of the upper surface of the electrode holder 13 is located at the center of the support plate 11.
A bearing 21 that can freely come into contact with the inner circumferential surface 11a of the support plate 11 is attached to the support plate. Further, a disk-shaped slide plate 23 having a diameter larger than the diameter of the inner circumferential surface 11a of the support plate 11 is integrally fixed to the upper end of the integral shaft 19 with bolts or the like. An annular retainer 25 is provided between the lower surface of the slide plate 23 and the upper surface of the support plate 11.
A large number of balls 27 rotatably held are interposed therebetween. Furthermore, the flange portion 13 of the electrode holder 13
A similar retainer 25 and balls 27 are also interposed between the upper surface of F and the lower surface of support plate 11. Therefore, although movement of the electrode boulder 13 in the vertical direction is restricted, it can be moved and rotated in all horizontal directions extremely smoothly.

前記ハウジング3内の中央部には固定軸29がハウジン
グ3の天井から垂設してあり、この固定軸29には軸承
31を介して回転体としてのプーリ33が回転自在に支
承されている。このプーリ33は、正逆回転自在なモー
タ(図示省略)によって正逆回転されるものである。こ
のプーリ33と前記スライド板23との間に、固定軸2
9に対して電極ホルダ13の軸心を偏心ぜしめる偏心機
構が介設しであるものである。すなわち、ポル1〜等に
よりプーリ33の下面に固定した偏心起動板35には、
第2図に示すごとく径方向のガイド孔37が穿設してあ
り、このガイド孔37内には摺動軸承体39が摺動のみ
自在に係合しである。この摺動軸承体39は偏心起動板
35に弾装したコイルスプリングのごとき弾機41によ
りガイド孔37の長手方向の一端側へ偏心するように常
に押圧附勢されているものである。上記摺動軸承体39
は、前記スライド板23の上面中央に突出した突出軸4
3を軸承45を介して支承しているものである。したが
って、常態においては、固定軸29の軸心に対し突出軸
43が偏心し、電極ホルダ13が常に偏心されているも
のである。
A fixed shaft 29 is suspended from the ceiling of the housing 3 at the center of the housing 3, and a pulley 33 as a rotating body is rotatably supported on the fixed shaft 29 via a bearing 31. This pulley 33 is rotated forward and backward by a motor (not shown) which can freely rotate forward and backward. Between this pulley 33 and the slide plate 23, the fixed shaft 2
An eccentric mechanism for making the axis of the electrode holder 13 eccentric with respect to the electrode holder 9 is provided. That is, the eccentric activation plate 35 fixed to the lower surface of the pulley 33 by Pol 1 etc.
As shown in FIG. 2, a radial guide hole 37 is bored, and a sliding shaft bearing 39 is engaged in a slidable manner within this guide hole 37. This sliding shaft bearing 39 is always pressed and biased by an elastic spring 41 such as a coil spring mounted on the eccentric activation plate 35 so as to be eccentric toward one end in the longitudinal direction of the guide hole 37. The above sliding shaft bearing 39
is a protruding shaft 4 protruding from the center of the upper surface of the slide plate 23.
3 is supported via a bearing 45. Therefore, under normal conditions, the protruding shaft 43 is eccentric with respect to the axis of the fixed shaft 29, and the electrode holder 13 is always eccentric.

前記フランジ5.スペーサ9および支持プレート11に
はそれぞれを貫通した貫通孔47が複数箇所に設けてあ
り、電極ホルダ13におけるフランジ部13Fにも上記
貫通孔47に対応する貫通7L49が穿設しである。複
数の貫通孔47に嵌合したビン51の下端部を貫通孔4
9に嵌合すると、ハウジング3と電極ホルダ13とが一
体化されるものであり、この場合には、弾機41に抗し
て摺動軸承体39が移動され、固定@2つと電極ホルダ
13との軸心が一致するものである。このように軸心が
一致した状態において、プーリ33およびスライド板2
3に同軸に穿設したビン孔(図示省略)にビンを貫通す
るなどの手段を講じてプーリ33とスライド板23を一
体化し、かつ前記ビン51を抜き去ることにより、電極
ホルダ13を回転することができるものである。
Said flange 5. The spacer 9 and the support plate 11 are provided with a plurality of through holes 47 passing through them, and the flange portion 13F of the electrode holder 13 is also provided with through holes 7L49 corresponding to the through holes 47. The lower end of the bottle 51 fitted in the plurality of through holes 47 is inserted into the through hole 4.
9, the housing 3 and the electrode holder 13 are integrated. In this case, the sliding shaft bearing 39 is moved against the elastic force 41, and the fixed @2 and the electrode holder 13 are The axes of the two are aligned. With the axes aligned in this way, pulley 33 and slide plate 2
The electrode holder 13 is rotated by integrating the pulley 33 and the slide plate 23 by passing the bottle through a bottle hole (not shown) coaxially drilled in the electrode 3 and removing the bottle 51. It is something that can be done.

以上のごとき構成において、複数のビン51を介してハ
ウジング3と電極ホルダ13とを一体化した状態のまま
電極ホルダ13に加工電極15を装着した後に、放電加
工機におけるラムRを下降せしめて放電加工を行なうも
のである。この場合、先ず、ワークWに対する加工電極
15の荒送りを行ない、荒加工を行なう。そして、荒加
工終了後にビン51を抜き去ると、弾機41の作用によ
り摺動軸承体39がガイド孔37の一端廁へ移動される
。したがって、固定軸29の軸心に対し突出軸43が偏
心し、電極ホルダ13が偏心することとなる。このよう
に固定軸29に対し−(突出軸43が偏心した状態にお
いてプーリ33を回転駆動すると、電極ホルダ13は水
平な方向に偏心運動を行ない微振動することとなる。こ
のように電極ホルダ13を水平方向へ微振動(偏心運動
)せしめた状態において放電加工機におけるラムRを下
降し、ワークWに対する加工電極15の微小送りを行な
って仕上の放電加工を行なう。
In the above configuration, after the machining electrode 15 is attached to the electrode holder 13 while the housing 3 and the electrode holder 13 are integrated through the plurality of bins 51, the ram R of the electric discharge machine is lowered to discharge It is used for processing. In this case, first, the machining electrode 15 is roughly fed to the workpiece W to perform rough machining. When the bottle 51 is removed after the rough machining is completed, the sliding shaft bearing 39 is moved to one end of the guide hole 37 by the action of the bullet 41. Therefore, the protruding shaft 43 is eccentric with respect to the axis of the fixed shaft 29, and the electrode holder 13 is eccentric. When the pulley 33 is rotated in a state where the protruding shaft 43 is eccentric with respect to the fixed shaft 29 in this way, the electrode holder 13 makes an eccentric movement in the horizontal direction and vibrates slightly. The ram R in the electrical discharge machine is lowered while the workpiece W is slightly vibrated (eccentrically moved) in the horizontal direction, and the machining electrode 15 is slightly fed to the workpiece W to perform the final electrical discharge machining.

前述のごとくワークWに対して加工電極15に送りを与
えて放電加工を行なうとき、プーリ33が正逆回転され
ることにより加工電極15が水平な方向に微振動しつつ
放電加工を行なうものであるから、加工表面が均される
こととなり、加工表面の精度が向上するものである。す
なわち、同一の加工電極によって荒加工と仕上加工を行
なうものであるから、加工能率及び加工精度が向上する
ものである。
As mentioned above, when performing electric discharge machining by feeding the machining electrode 15 on the workpiece W, the pulley 33 is rotated forward and backward, thereby performing electric discharge machining while the machining electrode 15 vibrates slightly in the horizontal direction. Because of this, the machined surface is leveled and the precision of the machined surface is improved. That is, since rough machining and finishing machining are performed using the same machining electrode, machining efficiency and machining accuracy are improved.

なお、さらに加工精度を向上せしめようとする場合には
、ワークW及び加工電極15を白灯油等の加工液体に没
入した放電加工の状態を解除し、加工液槽内の加工液を
排出して、ワークWと加工電極15との間にダイヤモン
ド粒子等のラップ剤を介在せしめ、加工電極15を水平
方向に微振動せしめることにより、ラップ加工のごとき
超仕上げが可能となるものである。
In addition, when attempting to further improve the machining accuracy, the workpiece W and the machining electrode 15 are released from the electrical discharge machining state in which they are immersed in a machining fluid such as white kerosene, and the machining fluid in the machining fluid tank is drained. By interposing a lapping agent such as diamond particles between the workpiece W and the processing electrode 15 and slightly vibrating the processing electrode 15 in the horizontal direction, super finishing such as lapping becomes possible.

前述のごとく、加工電極15に水平方向の微振動を与え
て放電加工或いは超仕上げ加工を行なうとき、ワークW
における加工部の方向性と加工電極15の方向性とにず
れを生ずる傾向にある場合には、加工電極15が微振動
によりワークWの加工部に当接すると、電極ホルダ13
の水平な僅かな回動が円滑に行なわれ、ワークWの加工
部と加工電極15との方向性は常に正確に保持されるも
のである。したがって、鋭角な部分であっても丸味をお
びることなしに正確な加工が行なわれ得るものである。
As mentioned above, when performing electric discharge machining or super finishing machining by applying horizontal slight vibration to the machining electrode 15, the work W
If there is a tendency for a deviation between the directionality of the machining part and the directionality of the machining electrode 15 in
A slight horizontal rotation is made smoothly, and the directionality between the machining part of the workpiece W and the machining electrode 15 is always accurately maintained. Therefore, even acute-angled portions can be processed accurately without being rounded.

なお、ワークWにおける加工部に対する加工電極15の
水平方向への振幅は、種々の径のビン51を多数用意し
、径の異なるビン51を着脱交換して、ビン51と貫通
孔49とのクリアランスを調節することにより種々調節
できるものである。
The horizontal amplitude of the machining electrode 15 with respect to the machining part of the workpiece W can be determined by preparing a large number of bins 51 of various diameters, and by attaching and detaching the bins 51 with different diameters and adjusting the clearance between the bins 51 and the through hole 49. Various adjustments can be made by adjusting .

このように加工部FfA15の振幅を調節する場合には
、ビン51に電極ボルダ13の貫通孔49の内周面が当
接した際に、弾機41に抗して摺動軸承体39が移動さ
れ、固定軸29に対する突出軸43の偏心量が前記ビン
51と貫通孔49のクリアランスに等しくなるものであ
る。種々の径のビン51を用意することが面倒である場
合には、例えば第1図に想像線で示すように、貫通孔4
9をテーパ孔に形成し、かつビン51の下端部をテーバ
状に形成し、ビン51を螺子機構あるいはスペーサ等に
より上下に位置調節自在な構成とすることも可能なもの
である。上記のように加工電極15の振幅を調節するこ
とにより、同一電極でもってワ〜りWにおける同一形状
の加工部の種々の大きさに対応することができるもので
ある。
When adjusting the amplitude of the processing portion FfA15 in this way, when the inner peripheral surface of the through hole 49 of the electrode boulder 13 comes into contact with the bottle 51, the sliding shaft bearing 39 moves against the bullet 41. The amount of eccentricity of the protruding shaft 43 with respect to the fixed shaft 29 is equal to the clearance between the bottle 51 and the through hole 49. If it is troublesome to prepare bottles 51 of various diameters, for example, as shown in phantom lines in FIG.
9 may be formed into a tapered hole, and the lower end of the bottle 51 may be formed into a tapered shape, so that the position of the bottle 51 can be adjusted up and down using a screw mechanism, a spacer, or the like. By adjusting the amplitude of the machining electrode 15 as described above, it is possible to deal with various sizes of machining portions of the same shape in the warp W using the same electrode.

なお、プーリ33と電極ホルダ13とを一体化して電極
ホルダ13を回転ぜしめて放電加工等を行なう場合は、
例えば、ワークWの加工部がテーパ孔であり、加工電極
15がテーパ孔に嵌合する円錐形状である場合に著効を
奏するものである。
In addition, when performing electric discharge machining etc. by integrating the pulley 33 and the electrode holder 13 and rotating the electrode holder 13,
For example, this is particularly effective when the workpiece W has a tapered hole and the processing electrode 15 has a conical shape that fits into the tapered hole.

以上のごとき実路例の説明より理解されるように、この
発明の要旨は、要1゛るに1寺許請求の範囲に記載のと
おりであるから、従来に比して放電加工を能率よくかつ
高精度に行なうことができるものである。
As can be understood from the above explanation of actual circuit examples, the gist of the present invention is mainly as stated in the claims, so that electric discharge machining can be performed more efficiently than in the past. Moreover, it can be performed with high precision.

なお、この発明は前述の実施例のみに限定されるもので
はなく、適宜の設計的変更を行なうことにより、その他
の態様により実施し得るものである。
Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate design changes.

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

第1図は本発明に係る装置の断面図、第2図は第1図に
おけるII−II線に沿った部分の断面図である。 (図面の主要な部分を表わす符号の説明)R・・・ラム
       3・・・ハウジング13・・・電極ホル
ダ   33・・・プーリ41・・・弾機 特 許 出願人  常磐精機工業株式会社第2図
FIG. 1 is a sectional view of an apparatus according to the present invention, and FIG. 2 is a sectional view of a portion taken along line II--II in FIG. 1. (Explanation of symbols representing main parts of the drawing) R...Ram 3...Housing 13...Electrode holder 33...Pulley 41...Bullet machine patent Applicant: Joban Seiki Kogyo Co., Ltd. No. 2 figure

Claims (2)

【特許請求の範囲】[Claims] (1)  放電加工機における上下動自在のラムに装着
したハウジングに電極ホルダを水平方向に微動自在に装
着して設け、前記ハウジング内に回転自在に設けた回転
体と前記電極ホルダとの間に偏心機構を介在して設け、
この偏心機構部に前記回転体に対して電極ホルダを偏心
せしめた状態に付勢保持する弾機を設けてなることを特
徴とする放電加工機における電極支持装置。
(1) An electrode holder is attached to a housing attached to a vertically movable ram in an electrical discharge machine so as to be able to move slightly in the horizontal direction, and an electrode holder is provided between a rotating body rotatably provided in the housing and the electrode holder. Provided with an intervening eccentric mechanism,
An electrode support device for an electrical discharge machine, characterized in that the eccentric mechanism section is provided with a bullet that biases and holds the electrode holder in an eccentric state with respect to the rotating body.
(2)  ハウジングに対する電極ホルダの水平方向へ
の微動量を調節自在の微゛動調節機構を備えてなること
を特徴とする特許請求の範囲第1項に記載の放電加工機
における電極支持装置。
(2) The electrode support device for an electric discharge machine according to claim 1, further comprising a fine movement adjustment mechanism that can freely adjust the amount of fine movement of the electrode holder in the horizontal direction with respect to the housing.
JP19974282A 1982-11-16 1982-11-16 Electrode supporting device in electric discharge machine Pending JPS5993234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19974282A JPS5993234A (en) 1982-11-16 1982-11-16 Electrode supporting device in electric discharge machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19974282A JPS5993234A (en) 1982-11-16 1982-11-16 Electrode supporting device in electric discharge machine

Publications (1)

Publication Number Publication Date
JPS5993234A true JPS5993234A (en) 1984-05-29

Family

ID=16412871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19974282A Pending JPS5993234A (en) 1982-11-16 1982-11-16 Electrode supporting device in electric discharge machine

Country Status (1)

Country Link
JP (1) JPS5993234A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9844262B2 (en) 2012-01-26 2017-12-19 Storexperts Inc. Variable planform shelving system
CN107538093A (en) * 2016-06-28 2018-01-05 上海特略精密数控机床有限公司 Wire cutting guide wheel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9844262B2 (en) 2012-01-26 2017-12-19 Storexperts Inc. Variable planform shelving system
US10542819B2 (en) 2012-01-26 2020-01-28 Techni, Llc Variable planform shelving system
CN107538093A (en) * 2016-06-28 2018-01-05 上海特略精密数控机床有限公司 Wire cutting guide wheel

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