EP0146833B1 - Dispositif pour le polissage électrolytique des surfaces intérieures d'objets cylindriques creux - Google Patents

Dispositif pour le polissage électrolytique des surfaces intérieures d'objets cylindriques creux Download PDF

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Publication number
EP0146833B1
EP0146833B1 EP84114684A EP84114684A EP0146833B1 EP 0146833 B1 EP0146833 B1 EP 0146833B1 EP 84114684 A EP84114684 A EP 84114684A EP 84114684 A EP84114684 A EP 84114684A EP 0146833 B1 EP0146833 B1 EP 0146833B1
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EP
European Patent Office
Prior art keywords
chassis
sponge
hollow cylindrical
cylindrical body
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP84114684A
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German (de)
English (en)
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EP0146833A2 (fr
EP0146833A3 (en
Inventor
Hermann Dipl.-Ing. Operschall
Klaus-Alfred Steiner
Ludwig Dipl.-Ing. Voggenthaler (Fh)
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Siemens AG
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Siemens AG
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
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Publication of EP0146833A2 publication Critical patent/EP0146833A2/fr
Publication of EP0146833A3 publication Critical patent/EP0146833A3/de
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Publication of EP0146833B1 publication Critical patent/EP0146833B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002—Decontamination of the surface of objects with chemical or electrochemical processes
    • G21F9/004—Decontamination of the surface of objects with chemical or electrochemical processes of metallic surfaces

Definitions

  • the invention relates to a device for electropolishing the inner surface of hollow cylindrical bodies, with at least one sponge electrode guided along the inner surface thereof, and with devices for guiding and supplying the sponge electrode with electrolyte, the sponge electrode being able to be pressed against the inner surface and rotating about its axis of curvature .
  • US-A-4 330 381 discloses a method for electropolishing the inner surface of hollow cylinders, in which a sponge-like material for receiving the electrolyte is introduced between the surface to be polished and the cathode.
  • the sponge-like material is arranged in a base frame.
  • This unit consisting of the frame and the sponge-like material and the actual electrode, is connected via arms to a shaft rotatably arranged in the cylinder axis by means of a divided sleeve.
  • the electrode is pressed against the surface to be treated using springs.
  • an annular part of the inner surface of the cylinder can be polished.
  • the sleeve In order to treat a subsequent annular part of the inner surface, the sleeve must be axially displaced on the shaft.
  • the invention brings an advantageous improvement to a device of the type mentioned according to the invention in that the sponge electrode is arranged in a housing and is surrounded by an annular seal which rests with its one edge on the housing and with its other edge on the inner surface of the hollow cylindrical body and that the sponge electrode is supported on a chassis which is supported on the inner surface of the hollow cylindrical body and is displaceable along its axis of curvature.
  • the electropolishing power can be increased considerably if several sponge electrodes are held on the chassis in a plane oriented perpendicular to the axis of symmetry of the chassis, offset by the same pitch angle.
  • the simultaneously electropolished surface can be multiplied without: having to use excessively large sponge electrodes.
  • the latter would limit the use of the device to hollow cylindrical bodies of certain closely adjacent radii of curvature.
  • this measure creates the precondition for rotating the sponge electrodes about the axis of symmetry of the chassis only a little more than their pitch angle according to a further particularly advantageous embodiment of the invention. This in turn simplifies the construction of the actuator required for this.
  • the apparatus 1 for electropolishing according to the invention also includes devices for supplying, discharging and processing the electrolyte liquid, and a power supply device.
  • Fig. 1 the chassis 3 is shown in a position in which it has just been inserted by the feed device 6 by means of the push rod 5 - here a rack - from the rerailing device 4 into the pipe socket 2 to be electropolished, cut open.
  • Fig. 1 one can see in connection with the Fig. 2u.3, the section along the lines 11-11 and III-III of Fig. 1 show that the chassis 3 from a support cylinder 7 aligned axially to the hollow cylindrical body to be cleaned. 7 exists, which is supported at its two ends on the inner surface of the hollow cylindrical body 2 by three support legs 9, 10, 11, 12, 13, 14 pivoted by 120 ° relative to one another about the axis of symmetry 8 of the support cylinder.
  • the three support legs 9 to 14 are each provided with an impeller 15, 16, 17, 18, 19, 20. .
  • an impeller 15, 16, 17, 18, 19, 20 To adapt to different pipe diameters are two of the arranged on every one side of the supporting cylinder 7 three Laufrader, namely the wheels 16, 17, 19, 20 as shown in FIG 1 indicates, at different radial distances from the Tragzy-: relieving 7 on the support legs 10, 11, 13, 14 screwable.
  • the impeller 15, 18 of the respective third support leg 9, 12 can be pressed against the inner wall of the hollow cylindrical body by means of a pressure piston 23, 24 which can be adjusted in a pressure cylinder 21, 22 which can be acted upon from two sides.
  • a ring 25 is rotatably mounted, on which four sponge electrodes 26, 27, 28, 29 are attached.
  • the sponge electrodes are coupled to the spring-loaded piston rod 30, 31, 32 each of a working cylinder 34, 35, 36, 37 which can be loaded on one side and can be pressed via its piston rod against the inner surface of the hollow cylindrical body 2 to be electropolished and can be lifted via the internals of the same.
  • a support plate 38 is mounted on the support cylinder 7 of the chassis 3. It projects beyond the rotatable ring 25 on opposite sides.
  • a hydraulic cylinder 39, 40 which can be acted upon on one side is mounted on this support plate 38 on opposite sides of the rotatable ring 25.
  • a small chain wheel 43, 44 is mounted on the piston rods 41, 42 of these two hydraulic cylinders.
  • the ring 25 rotatable about the support cylinder of the chassis 3 also has a sprocket-like toothing 45 on its outer periphery.
  • the two ends of a finite chain 46 are fastened on opposite sides of the rotatable ring. This chain 46 is, as shown in FIG.
  • the rerailing device 4 consists essentially of a tube 47 with the same inner diameter as the pipe socket 2 to be electroplated.
  • This pipe 47 of the rerailing device is closed on its side facing away from the pipe socket 2 to be electropolished by a flanged cover 48 .
  • the rerailing device On its open side facing the pipe socket to be electropolished, the rerailing device is provided with guide angles 49 (only one shown) and tensioning devices 50 (only one shown).
  • the tube of the rerailing device carries two eyelets 51, 52. This tube 47 of the rerailing device 4 is so long that it can completely accommodate the chassis 3 after completion of the work.
  • the feed device 6 is suspended in a manner not shown here, centered on the cover 48 of the rerailing device 4 and gimballed on it.
  • the feed device has an electric motor 53, the toothed pinion (not shown) of which is in engagement with the toothed rack 5, which is guided through the feed device 6 approximately axially to the tube 47 of the rerailing device 4.
  • the pinion can be disengaged.
  • the rack 5 can also be moved manually via a handle 54.
  • the rack is articulated to the support cylinder 7 of the chassis 3.
  • a feed-through 56 for the various hydraulic hoses 57, 58, 59, 60 and for the feed hose 61 and drain hose 62 for the electrolyte liquid are provided on the cover 48 of the rerailing device 4, in addition to the feed-through 55 for the rack 5, a feed-through 56 for the various hydraulic hoses 57, 58, 59, 60 and for the feed hose 61 and drain hose 62 for the electrolyte liquid are provided.
  • an exhaust port 63 for aerosol is attached.
  • the rerailing device 4 is at the lower end of the tube 47 Drain pipe 64 attached for leaked electrolyte liquid.
  • chassis 3 carries on its front side in a pushing direction a bulkhead 92 which closes the lower part of the hollow cylindrical body 2 in a liquid-tight manner.
  • the bulkhead 93 can be tensioned separately from the chassis 3 in the hollow cylindrical body.
  • Fig. 4 shows a plan view of one of the sponge electrodes 26, 27, 28, 29. It can be seen here that the sponge electrode 26, which has a circular disk-shaped outline, with its side facing away from the surface to be cleaned of the inner wall 65 of the pipe socket 2 on one side cross-shaped guide frame 66 is screwed. 5, a ball joint 67 is mounted, which can be screwed onto the piston rod 30, 31, 32, 33 of one of the working cylinders 34, 35, 36, 37 attached to the rotating ring 25 and screwed onto the piston rod 30 is. A ball roller cage 68, 69, 70, 71 is attached to the four ends of the guide frame. When the sponge electrode 26 is in contact with the inner wall 65 of a hollow cylindrical body 2, it comes to rest.
  • the outer edge of a further annular rubber seal 74 is clamped on the side of the housing ring facing the guide frame . Its inner edge is tightly clamped on the edge of a pot-shaped pressure plate 75.
  • This pot-shaped pressure plate 75 carries a sponge body 76 in the bottom area, on its side facing the surface to be electropolished.
  • the pot-shaped pressure plate 75 is held centered by the ring-shaped rubber seal 74 relative to the housing ring 72.
  • electrolyte inlet pipe connections 77, 78, 79, 80 which are guided so as to be longitudinally displaceable through one of the four arms 81, 82, 83, 84 of the cruciform guide frame 66.
  • a pressure spring 85 (only one shown) is placed over each of these four electrolyte inlet pipe connections 77, 78, 79, 80, which are supported on one side on the guide frame 66 and on the other side on the cup-shaped pressure plate 75 and thereby the latter against the Press the electropolishing inner wall 65.
  • the electrolyte feed line connecting pieces 77, 78, 79, 80 are led through the bottom area of the pot-shaped pressure plate 75 into the sponge body 76.
  • a hollow cylindrical body 2 for example a pipe section or pipe socket, is to be electropolished or decontaminated by electropolishing, the device 1 according to the invention can be used for electropolishing, i.e.
  • the rerailing device 4 with the undercarriage 3 located in the rerailing device and the gimbal-mounted feed device 6 on the cover 48 of the rerailing device are transported by means of the lifting eyes 51, 52 by a crane in front of the pipe socket 2 to be electropolished.
  • the rerailing device 4 is centered on the pipe socket 2 to be electropolished by means of the guide angles 49 and clamping means 50 and brought into contact.
  • the hoses 61, 62 led out of the cover 48 of the rerailing device for the electrolyte supply and suction as well as the hydraulic hoses 57, 58, 59, 60 for pressing the running wheels 15 to 20 of the chassis 3, as well as the working cylinders 34, 35, 36 , 37 for pressing the sponge electrodes 26, 27, 28, 29 to the supply devices not shown here.
  • the chassis 3 with the sponge electrodes 26, 27, 28, 29 can now be inserted via the electric motor 53 or also manually via the handle 54 by axially displacing the rack 5 in the feed device 6 into the pipe socket 2 to be electropolished.
  • the sponge electrodes 26, 27, 28; 29 are located inside the pipe socket, they can be pressed against the inner surface of the pipe socket via the piston rods 30, 31, 32, 33 of the working cylinders 34, 35, 36, 37.
  • the sponge electrodes will fit snugly against the inner surface of the hollow cylindrical body even if the chassis 3 is not centered in the axis of curvature of the hollow cylindrical body or if its radius of curvature changes in the circumferential direction.
  • the respective working cylinder 34, 35, 36, 37 can only press the individual sponge electrode against the inner surface 65 of the hollow cylindrical body until the rollers of the ball roller cages 68, 69, 70, 71 rest on the inner surface.
  • the sponge body 76 of the sponge electrode 26 already lies against the inner surface and is pressed back somewhat in the direction of the guide frame 66 by the inner surface against the force of the pressure springs 85 placed over the electrolyte feed pipe connections 77, 78, 79, 80 .
  • the electrolyte liquid wets the sponge body 76 and connects it conductively to the pot-like pressure plate 75.
  • This is in turn conductive with the electrolyte feed line Connection 77, 78, 79, 80 connected, which is present via a terminal contact 90 on the negative pole of the power supply (not shown).
  • the removed surface material is taken up in the sponge body 76.
  • the excess electrolyte liquid that runs out of the sponge body remains in the cavity, which is stretched between the housing ring 42 and the rim of the pot-like pressure plate 75 by the inner wall 65 of the workpiece to be electropolished, the annular seal 73 lying against it and the annular disk-shaped rubber seal 74.
  • the excess electrolyte liquid is sucked back into the treatment device via the electrolyte suction line connection piece 86, 87, 88, 89 and the discharge hose 62 connected to it.
  • the suction pressure can be set so that air is also sucked in under the annular seal 73 which bears against the inner wall to be electropolished. This reliably prevents electrolyte liquid from escaping in significant quantities.
  • the extracted electrolyte-air mixture is then separated from one another in the treatment device in a manner not shown here.
  • the rotatable ring 25 with the sponge electrodes 26 to 29 arranged on its circumference is rotated back and forth at a uniform speed around the support cylinder 7 of the chassis 3.
  • the rotation takes place at a somewhat larger angle than the pitch angle between the sponge electrodes 26, 27, 28, 29.
  • the rotatable ring 25 is rotated back and forth by a little more than 90 °.
  • the electrolyte liquid emerging from the sponge body 76 and flowing out under the annular seal 73 of the sponge electrodes 26 collects at the lower end of the pipe socket 2 to be decontaminated. It can be withdrawn from there via the outlet connection 64 for the electrolyte liquid on the tube 47 of the rerailing device 4.
  • a pipe plug or a liquid barrier is placed behind the area to be electropolished.
  • Such a liquid-like barrier 93 which is designed in segment-like fashion and is attached to the chassis 3, has been indicated by dashed lines in FIG.
  • the pinion can be disengaged in a manner not shown here, and the rack can either be turned by the pinion by means of the handle 54 or via a ratchet (not shown) coupled to the handle, which acts directly on the rack , move back and forth together with the chassis.
  • the present device can also be used for larger closed containers.
  • the rerailing device must be dispensed with and the chassis with the support leg rollers, support cylinders and sponge electrodes must be installed in the pressure vessel after these components have been passed through the manhole.
  • the feed of this device is then expediently carried out manually by means of a push rod which is led out through the manhole.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Cleaning In General (AREA)

Claims (22)

1. Dispositif d'électropolissage de la surface intérieure d'objets cylindriques creux, comprenant au moins une électrode spongieuse guidée le long de leur surface intérieure, ainsi que des dispositifs de guidage et d'alimentation de l'électrode spongieuse en électrolyte, l'électrode spongieuse pouvant être poussée contre la surface intérieure et pouvant tourner autour de l'axe de courbure de celle-ci,
caractérisé,
en ce que l'électrode spongieuse (26, 27, 28, 29) est montée dans un boîtier et est entourée d'une garniture d'étanchéité (73) annulaire qui s'applique par l'un de ses bords au boîtier (72) et, par son autre bord, à la surface intérieure (65) de l'objet cylindrique creux (2), et en ce que l'électrode spongieuse (26, 27, 28, 29) est portée par un chariot (3) à roulettes (15 à 20) qui s'appuie sur la surface intérieure (65) de l'objet cylindrique creux (2) et qui peut coulisser le long de l'axe de courbure de celui-ci.
2. Dispositif suivant la revendication 1,
caractérisé,
en ce que l'électrode spongieuse (26, 27, 28, 29) peut tourner, par l'intermédiaire d'une transmission de commande (39 à 46), montée sur le chariot (3), par rapport au chariot (3) autour de l'axe de courbure de l'objet cylindrique creux (2) et autour de l'axe de symétrie (8) du chariot qui est parallèle à l'axe de courbure.
3. Dispositif suivant la revendication 1,
caractérisé,
en ce que, lorsqu'il est prévu plus d'une électrode spongieuse, chaque électrode spongieuse (26 à 29) pouvant être repoussée, par l'intermédiaire d'un organe de réglage (30 à 37), notamment d'un vérin hydraulique (34 à 37), contre la surface intérieure de l'objet cylindrique creux.
4. Dispositif suivant la revendication 1,
caractérisé,
en ce que l'électrode spongieuse (26 à 29) possède un boîtier (72) s'appuyant rigidement, par des éléments d'appui (68 à 71 ), sur la paroi du tube.
5. Dispositif suivant la revendication 4,
caractérisé,
en ce que le boîtier comporte un corps spongieux (76) repoussé par une plaque d'appui (75) contre la surface intérieure (65) du corps cylindrique creux (2).
6. Dispositif suivant la revendication 5,
caractérisé,
en ce que la plaque d'appui (75) est soumise à l'action d'un ressort.
7. Dispositif suivant la revendication 1,
caractérisé,
en ce que la plaque d'appui (75) est reliée à ce que l'on appelle une garniture d'étanchéité (74) supérieure qui, ensemble avec les surfaces intérieures (65) de l'objet cylindrique creux (2) à électropolir, et la garniture d'étanchéité (73) annulaire qui s'y applique, rend étanche la partie du boîtier dans laquelle se trouve le corps spongieux (76).
8. Dispositif suivant la revendication 5,
caractérisé,
en ce que, à la plaque d'appui (75) du corps spongieux (76), est raccordé un conduit (77 à 80) qui la traverse et qui est destiné à l'électrolyte.
9. Dispositif suivant la revendication 7,
caractérisé,
en ce qu'un conduit d'aspiration (62, 86 à 89) de l'électrolyte est raccordé à la partie du boîtier (72) dans laquelle se trouve le corps spongieux.
10. Dispositif suivant la revendication 9,
caractérisé,
en ce que la dépression dans le conduit d'aspiration (62, 86 à 89) est telle que de l'air est également toujours aspiré sous la garniture d'étanchéité (73) annulaire, qui s'applique contre la paroi intérieure (65) du corps cylindrique creux (2) et qui entoure le corps spongieux (76).
11. Dispositif suivant la revendication 3,
caractérisé,
en ce que l'organe de réglage (30, 31, 32, 33) attaque, par l'intermédiaire d'une rotule (67), la partie centrale du boîtier de l'électrode spongieuse (26, 27, 28, 29).
12. Dispositif suivant la revendication 4,
caractérisé,
en ce qu'on utilise comme éléments d'appui des cages de roulement (68, 69, 70, 71).
13. Dispositif suivant la revendication 1,
caractérisé,
en ce que l'électrode spongieuse (26, 27, 28, 29) est portée par un anneau (25) tournant qui est monté sur un cylindre de support (7) du chariot (3).
14. Dispositif suivant la revendication 4,
caractérisé,
en ce que l'électrode spongieuse (26, 27, 28, 29) peut être orientée d'au moins un pas angulaire au moyen d'un fluide sous pression, par l'intermédiaire d'au moins un piston moteur qui peut être déplacé par un vérin moteur (34 à 37).
15. Dispositif suivant la revendication 1,
caractérisé,
en ce que le chariot (3) peut être déplacé par l'intermédiaire d'une barre de poussée (5), par une transmission de commande (6) se trouvant à l'extérieur de l'objet cylindrique creux (2), le long de celui-ci.
16. Dispositif suivant la revendication 1,
caractérisé,
en ce que les roulettes (15 à 20) du chariot peuvent être mises en contact de transmission de forces avec la surface intérieure (65) de l'objet cylindrique creux (2), par l'intermédiaire d'éléments commandés, notamment de vérins d'attaque (21, 22).
17. Dispositif suivant la revendication 1,
caractérisé,
en ce que le chariot (3) porte, sur son côté avant dans la direction d'introduction, une cloison (92) fermant la partie la plus basse de l'objet cylindrique creux (2) d'une manière étanche aux liquides.
18. Dispositif suivant la revendication 17,
caractérisé,
en ce que la cloison (92) peut être bloquée dans l'objet cylindrique creux, indépendamment du chariot (3).
19. Dispositif suivant la revendication 1,
caractérisé,
en ce que, pour le traitement de tubes, on peut ajouter un dispositif tubulaire de mise en place, qui est adapté au tronçon du tube (2) qui reçoit le chariot (3) et qui est fermé partiellement à son extrémité éloignée du tube à nettoyer.
20. Dispositif selon la revendication 19,
caractérisé
en ce que le dispositif (4) de mise en place est muni d'un embout d'évacuation (64) de l'électrolyte en excès.
21. Dispositif selon la revendication 19,
caractérisé
en ce qu'un dispositif d'avance (6) du chariot (3) peut être fixé au dispositif (4) de mise en place.
22. Dispositif selon la revendication 15,
caractérisé
en ce que le dispositif d'avance (6) est, pour déplacer des tuyaux en coude, monté à la cardan sur le dispositif (4) de mise en place de la barre de poussée (5) est montée à la cardan sur le chariot (3).
EP84114684A 1983-12-14 1984-12-03 Dispositif pour le polissage électrolytique des surfaces intérieures d'objets cylindriques creux Expired - Lifetime EP0146833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833345278 DE3345278A1 (de) 1983-12-14 1983-12-14 Vorrichtung zum elektropolieren der innenoberflaeche von hohlzylindrischen koerpern
DE3345278 1983-12-14

Publications (3)

Publication Number Publication Date
EP0146833A2 EP0146833A2 (fr) 1985-07-03
EP0146833A3 EP0146833A3 (en) 1987-05-13
EP0146833B1 true EP0146833B1 (fr) 1990-08-01

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EP84114684A Expired - Lifetime EP0146833B1 (fr) 1983-12-14 1984-12-03 Dispositif pour le polissage électrolytique des surfaces intérieures d'objets cylindriques creux

Country Status (8)

Country Link
US (1) US4634511A (fr)
EP (1) EP0146833B1 (fr)
JP (1) JPS60146626A (fr)
CA (1) CA1229067A (fr)
DE (2) DE3345278A1 (fr)
ES (1) ES8605873A1 (fr)
SU (1) SU1491347A3 (fr)
UA (1) UA5973A1 (fr)

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ES538635A0 (es) 1986-01-16
US4634511A (en) 1987-01-06
UA5973A1 (uk) 1994-12-29
EP0146833A2 (fr) 1985-07-03
DE3482871D1 (de) 1990-09-06
JPH0547327B2 (fr) 1993-07-16
SU1491347A3 (ru) 1989-06-30
CA1229067A (fr) 1987-11-10
EP0146833A3 (en) 1987-05-13
ES8605873A1 (es) 1986-01-16
DE3345278A1 (de) 1985-06-27
JPS60146626A (ja) 1985-08-02

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