EP0038270A2 - Means for supporting and guiding a tool at the interior of a hole - Google Patents

Means for supporting and guiding a tool at the interior of a hole Download PDF

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Publication number
EP0038270A2
EP0038270A2 EP81400600A EP81400600A EP0038270A2 EP 0038270 A2 EP0038270 A2 EP 0038270A2 EP 81400600 A EP81400600 A EP 81400600A EP 81400600 A EP81400600 A EP 81400600A EP 0038270 A2 EP0038270 A2 EP 0038270A2
Authority
EP
European Patent Office
Prior art keywords
tool
axis
nozzle
support
tap
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
EP81400600A
Other languages
German (de)
French (fr)
Other versions
EP0038270B1 (en
EP0038270A3 (en
Inventor
Jean-Benoit Duverne
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Priority to AT81400600T priority Critical patent/ATE6222T1/en
Publication of EP0038270A2 publication Critical patent/EP0038270A2/en
Publication of EP0038270A3 publication Critical patent/EP0038270A3/en
Application granted granted Critical
Publication of EP0038270B1 publication Critical patent/EP0038270B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/08—Portable grinding machines designed for fastening on workpieces or other parts of particular section, e.g. for grinding commutators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306216—Randomly manipulated, work supported, or work following device
    • Y10T409/306384—Randomly manipulated, work supported, or work following device with work supported guide means
    • Y10T409/30644—Randomly manipulated, work supported, or work following device with work supported guide means to guide tool to move in arcuate path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y10T409/30756—Machining arcuate surface

Definitions

  • the invention relates to a device for supporting and moving a tool inside a nozzle passing through a wall so as to be flush with one side of the wall and protruding from the other side.
  • outlets or arrivals of pipes in the vessel, or tappings are formed in the wall of the vessel so as to allow connection, outside of this tank, between the tapping and an arrival or departure pipe.
  • Such tappings are formed in the wall so that the tapping is flush with the internal surface of the tank and is fairly widely projecting outside the tank for its connection with a pipe of the primary circuit of the reactor bringing the water under pressure. in the tank or on the contrary allowing the exit of this water which acts as a coolant in the reactor core, outside the tank for its sending to the steam generators.
  • the internal surface of the tank as well as the internal surface of the taps must be coated with a layer of stainless steel and it is necessary to carry out a quality control of this coating, in particular inside the taps provided in the wall of the tank.
  • the machining or controls inside the taps of the primary circuit are generally carried out when the tank is in the vertical position, that is to say with taps whose axes are practically horizontal.
  • the proper execution of the work inside the stitching is limited by the fact that the accessibility is not very good, the internal diameter of this stitching being relatively low. In some cases, the space available is not even sufficient to allow the use of certain tools.
  • the taps of the pressurized water inlet pipes to the reactor vessel also have a conical bore which further complicates manual machining operations in order to achieve a good surface condition.
  • the object of the invention is therefore to propose a device for supporting and moving a tool inside a nozzle having a symmetry of revolution and passing through a wall so as to be flush with one side of the wall and to be protruding on the other side, this device allowing automation of the work carried out with the tool, precise positioning of the tool relative to the surface to be worked inside the tapping and an adaptation to different types of profile and to different dimensions of this bore.
  • FIG. 1 a part of the wall 1 of a pressurized water reactor vessel is seen in which a nozzle 2 has been formed which is practically flush with the interior surface 1a of the wall 1 of the vessel and which projects relative to the external wall lb of this tank.
  • the internal bore 3 of the tap 2 is of cylindrical shape.
  • the device for supporting and moving a grinding tool in the tapping bore shown in FIG. 1 comprises a handling chassis 6, a star support 7, a tool bar 8 and a centering bell 9.
  • the handling chassis is constituted by a square formed by two beams 10 and 11 of rectangular section, the beam 10 being arranged vertically and the beam 11 horizontally when the device is in position inside the vertical tank 1.
  • the horizontal beam 11 carries a handling lug 12 allowing the transport of the device as a whole with an overhead crane.
  • This beam 11 is supported on the upper part of the tank 1 by means of two supports 13 constituted by screws allowing the verticality of the handling chassis to be adjusted in position on the tank.
  • a means of fixing the handling chassis to the tank consisting of an arm 14 held in position at the end of the beam 11 by pins 15 inserted into openings of the fixing arm 14.
  • a screw 16 allows the handling chassis to be locked in position on the upper part of the tank.
  • the handling chassis 6 also carries an electrical cabinet 17 allowing the supply of the motor components of the device.
  • the handling frame 6 is connected to the star support device 7 by bolting at a junction plate 18 ensuring the connection between the lower end of the handling frame and one of the branches of the star support 7.
  • the support 7 consists of three branches 7a, 7b, 7c arranged with the plane of symmetry of the plans containing the axis xx 'of the stitching called radial planes.
  • the branches 7a, 7b, 7c are arranged with a certain inclination with respect to the vertical in a radiating manner with respect to the nozzle when the device is in position as shown in FIG. 1.
  • the branch 7a is formed at its end by a beam portion 19 allowing the connection of the branch 7a. With the frame 6. This end portion 19 of the branch 7a also carries a suction cup 20 whose position is adjustable relative to the branch 7a by means of a screw 21.
  • the beam 19 also carries a centering bracket 23 intended to come to engage in the orifice of the bore 3 flush with the internal surface la of the tank, this bracket carrying it -even a lug 24 allowing the support on the internal surface of the tank.
  • branches 7b and 7c respectively comprise adjustable suction cups 20b and 20c and support brackets 23b and 23c arranged at the end of the oblique branches 7b and 7c to allow the centering and the attachment of the device on the surface internal of the tank at the nozzle.
  • the pins 24b and 24c associated with the arms 7b and 7c respectively are adjustable by means of jacks 22.
  • a bearing 25 in which a shaft 26 is pivoted in an axial direction relative to the nozzle.
  • the shaft 26 is connected to the tool bar 8 by means of a device 30 allowing an inclination adjustment.
  • the device 30 will be described in more detail with reference to FIGS. 3 and 4.
  • a flywheel 31 making it possible to manually rotate the shaft 26 from a work floor inside the tank.
  • the end of the shaft 26 is also solihire with a toothed wheel 34 meshing with a pinion 35 driven by a motor 36 carried by the branch 7a of the star.
  • the centering bell 9 introduced into the protruding end of the nozzle has a cylindrical jacket 38 carrying on its outer surface sliding pads such as 39 facilitating the introduction of the centering bell in the nozzle, and an inflatable seal 40 disposed at the inside of a groove machined in a projecting part of the external surface of the bell 38.
  • a bearing 41 constituted by a tube made integral with the bottom of the bell 38 by ribs 42.
  • a shaft 44 connected in an articulated manner to the end of the tool bar 8 as will be explained with reference to FIG. 2.
  • the shafts 26 and 41 are aligned and arranged axially by relative to the stitching, that is to say in the case of FIG. 1 in a horizontal direction.
  • the tool bar 8 is provided over its entire length with a dovetail profile slide 46 and a screw 47 mounted in bearings such as 48 allowing the tool 50 to be displaced by a grinding wheel and its drive motor in the axial direction of the stitching.
  • the shaft 44 is integral with a bracket 50, the horizontal part of which enables the tool-holder bar 8 to be fixed in a precise position with regard to its orientation relative to the shaft 44.
  • the bar 8 is integral a sleeve 51 in the central bore through which passes. an axis 52 fixed relative to the bracket by means of screws 53 and relative to the sleeve 51 by a nut 54 engaged on the threaded upper end of the shaft 52. Openings in the sleeve 51 and keys 55 allow to maintain the shaft 8 in a constant angular position with respect to the shaft 44 in the axial direction, if a rotation is made around the axis 52.
  • the shaft 44 is pierced at its center with a channel 57 allowing the supply of control fluid to the inflatable seal 40.
  • the plate 62 has two holes 63a inside which pass screws 63b allowing the shaft 26 and the tool bar 8 to be secured.
  • the tool bar 8 is secured to a fixing plate 61, however a support plate 60 is interposed between the plate 62 secured to the shaft 26 and the plate 61 secured to the tool support bar 8.
  • the support plate 60 is pierced with holes 68 centered on the vertical axis of this plate 60.
  • the plate 61 secured to the tool bar 8 comprises two sets of two threaded holes 67 whose spacing corresponds to the spacing of the holes 63a of the plate 62.
  • FIG. 3 a first set of holes 67 of the plate 61 has been placed in accordance with the holes 63a and 68, so that the screws 63b allow the shaft 26 and the tool bar to be secured so that the axis of this tool bar 8 is parallel to the axis of the shaft 26, that is to say to the axis of the nozzle.
  • the second set of holes 67 when brought into concordance with the holes 63a and 68 allows the plate 61 to be placed in the position 61 t shown in broken lines in FIG. 3. For this, it suffices to unscrew the screws 63b and move the plate 61 secured to the tool bar 8 downward, then rotate it slightly to bring the holes 67 in line with the holes 63a and 68. We can then secure the shaft 26 and the bar again tool holder 8 thanks to the screws 63b which are fixed in the second set of holes 67 of the plate 61.
  • the axis of the tool bar 8 is then inclined relative to the axis of the shaft 26, that is to say relative to the axis of the tap 2.
  • the device is then in the position shown in FIG. 6.
  • the arrangement of the two sets of holes 67 on the plate 61 is chosen so as to bring the axis of the tool-holder bar in the direction of a generator of the cone constituting the bore of the tap 2 'shown in FIG. 6.
  • the tappings are of two types, some with cylindrical internal bore, and the others with conical internal bore.
  • a plate comprising two sets of holes 67 as shown, it is therefore possible very quickly and very easily to pass from the position of the device, from the machining position in a cylindrical bore to the machining position in a tapered bore.
  • the grinding wheel of the tool 50 can then describe a conical surface corresponding to the interior surface of the bore.
  • the assembly of the tool 50 is seen consisting of a grinding wheel 70 mounted on an axis 71 driven by a motor 72 by means of a belt 73.
  • All of the tools are fixed to a frame 74 mounted sliding on the dovetail slide 46 secured to the tool bar 8.
  • the frame 74 carries a nut 75 in engagement with the screw endless 47 driven in rotation by a motor carried by the tool bar 8.
  • the axis 71 of the grinding wheel 70 is on the other hand rotatably mounted in a barrel 77 which can be moved along its axis by a jack 78, relative to the frame 74 of the tool. Penetration movements are thus carried out of the grinding wheel in the coating metal of the tapping bore.
  • a set of pulleys 79 makes it possible to send the electrical wires or fluid supply tubes to the various motors or jacks carried by the tool bar and the tools.
  • the device is then introduced into the nozzle by carrying out its handling using the lifting lug 12 until the bell is in its final position at the end of the protruding part of the nozzle.
  • the pins 24 are placed in position against the internal wall of the tank and the seal 40 of the bell 28 is inflated by sending the seal control fluid through the central channel 57 of the shaft 44.
  • suction cups 20 are then adjusted by action on the screws 21 so that these suction cups come into contact with the internal wall of the tank.
  • These suction cups 20 obviously have a contact surface constituting a cylinder portion to allow them to perfectly match the internal surface of the tank.
  • suction cups are then placed under vacuum, which makes it possible to keep the device in place independently of any other support.
  • step-by-step advance of the grinding wheel in the axial direction and to make a rotation of slightly more than 360 ° tool bar to carry out a complete sweep of the surface with a slight overlap.
  • step-by-step advances is obviously chosen so that its amplitude is less than the working width of the grinding wheel.
  • the main advantages of the device according to the invention are to allow automation of the machining operations in a tapping and the use of more bulky tools, to have a large power at the end of the shaft and to allow adaptation to various geometries of the stitching.
  • the use of the device according to the invention is particularly simple and particularly safe.
  • a tool can be placed on the tool bar allowing any operation to be carried out inside the nozzle at a location: any of the bore of this nozzle.
  • the use of the device according to the invention is of course not limited to machining operations and checks can be carried out non-destructive inside a tapping by replacing the tool mounted on the tool bar by a control means which can be moved into positions allowing the control of the entire internal surface of the bore.

Abstract

A supporting and centering arrangement in the form of a star the arms of which are radial with respect to a tapping to be machined or checked. These arms have elements for centering and fastening them to the tapped wall, as well as a centering element at the projecting end of the tapping. The support and the centering element carry bearings. A tool holder bar connected to two rotating stub shafts is mounted off-set from the axis of the bearings in the radial direction of the tapping. The bar supports a tool guide, and is rotatable about the axis of the tapping. The device is especially useful for machining and checking tappings formed in a pressurized water nuclear reactor tank.

Description

L'invention concerne un dispositif de support et de déplacemen t d'un outil à l'intérieur d'un piquage traversant une paroi de façon à affleurer d'un côté de la paroi et à être saillant de l'autre côté.The invention relates to a device for supporting and moving a tool inside a nozzle passing through a wall so as to be flush with one side of the wall and protruding from the other side.

Dans les composants lourds chaudronnés, en particulier les cuves de réacteur nucléaire à eau sous pression, des départs ou arrivées de conduites dans la cuve, ou piquages, sont formés dans la paroi de la cuve de façon à permettre le raccord, à l'extérieur de cette cuve, entre le piquage et une conduite d'arrivée ou de départ.In heavy boilermaking components, in particular nuclear pressurized water reactor vessels, outlets or arrivals of pipes in the vessel, or tappings, are formed in the wall of the vessel so as to allow connection, outside of this tank, between the tapping and an arrival or departure pipe.

De tels piquages sont formés dans la paroi de façon que le piquage affleure la surface interne de la cuve et se trouve assez largement saillant à l'extérieur de la cuve pour son raccord avec une conduite du circuit primaire du réacteur amenant l'eau sous pression dans la cuve ou au contraire permettant la sortie de cette eau qui agit comme réfrigérant dans le coeur du réacteur, à l'extérieur de la cuve pour son envoi vers les générateurs de vapeur.Such tappings are formed in the wall so that the tapping is flush with the internal surface of the tank and is fairly widely projecting outside the tank for its connection with a pipe of the primary circuit of the reactor bringing the water under pressure. in the tank or on the contrary allowing the exit of this water which acts as a coolant in the reactor core, outside the tank for its sending to the steam generators.

La surface interne de la cuve de même que la surface interne des piquages doit être revêtue d'une couche d'acier inoxydable et il est nécessaire d'effectuer un contrôle de la qualité de ce revêtement, en particulier à l'intérieur des piquages ménagés dans la paroi de la cuve.The internal surface of the tank as well as the internal surface of the taps must be coated with a layer of stainless steel and it is necessary to carry out a quality control of this coating, in particular inside the taps provided in the wall of the tank.

De tels contrôles supposent un très bon état de la surface du revêtement et il est nécessaire d'effectuer un meulage de toute la surface interne du piquage avant de commencer l'opération de contrôle.Such checks assume a very good condition of the surface of the covering and it is necessary to grind the entire internal surface of the nozzle before starting the checking operation.

D'autre part, lorsque des défauts sont décelés, il est nécessaire d'effectuer des usinages plus profonds qu'un meulage superficiel pour savoir quelle est la profondeur de ces défauts.On the other hand, when defects are detected, it is necessary to carry out machining deeper than a surface grinding to know what is the depth of these defects.

Pour effectuer les opérations d'usinage ou les opérations de contrôle il est nécessaire de déplacer un outil ou un moyen de contrôle à l'intérieur du piquage pour faire occuper à cet outil ou à ce moyen de contrôle des positions différentes permettant d'atteindre les différentes zones de la surface latérale du piquage.To carry out the machining operations or the control operations it is necessary to move a tool or a control means inside the nozzle to make this tool or this control means occupy different positions making it possible to reach the different areas of the lateral surface of the stitching.

Dans le cas des cuves de réacteur à eau sous pression, les usinages ou contrôles à l'intérieur des piquages du circuit primaire se font généralement lorsque la cuve est en position verticale, c'est-à-dire avec des piquages dont les axes sont pratiquement horizontaux.In the case of pressurized water reactor tanks, the machining or controls inside the taps of the primary circuit are generally carried out when the tank is in the vertical position, that is to say with taps whose axes are practically horizontal.

Ces opérations sont actuellement réalistes manuellement et sont donc extrêmement pénibles puisqu'il faut travailler avec des positions très différentes de l'outil alors que le diamètre intérieur du piquage est relativement faible.These operations are currently realistic manually and are therefore extremely painful since it is necessary to work with very different positions of the tool while the internal diameter of the nozzle is relatively small.

De même, la bonne exécution du travail à l'intériar du piquage est limitée par le fait que l'accessibilité n'est pas très bonne, le diamètre intérieur de ce piquage étant relativement.faible. Dans certains cas, la place disponible n'est même pas suffisante pour permettre l'utilisation de certains outillages.Likewise, the proper execution of the work inside the stitching is limited by the fact that the accessibility is not very good, the internal diameter of this stitching being relatively low. In some cases, the space available is not even sufficient to allow the use of certain tools.

Les piquages des conduites d'arrivée d'eau sous pression à la cuve du réacteur ont d'autre part un alésage de forme conique qui complique encore les opérations d'usinage manuel pour parvenir à un bon état de surface.The taps of the pressurized water inlet pipes to the reactor vessel also have a conical bore which further complicates manual machining operations in order to achieve a good surface condition.

. D'une manière plus générale, lorsqu'on veut effectuer des opérations d'usinage ou de contrôle dans des piquages ménagés dans la paroi d'un composant chaudronné de grande dimension, on rencontre des difficultés dues à l'exiguité de l'espace dans lequel on doit opérer l'usinage, aux positions diverses qu'il faut faire prendre à l'outil ou au moyen de contrôle pour suivre la surface interne du piquage et au fait que l'alésage interne de ces piquages n'a pas toujours une forme cylindrique.. More generally, when it is desired to carry out machining or control operations in tappings formed in the wall of a large boilermaking component, one encounters difficulties due to the smallness of the space in which one must carry out the machining, in the various positions which it is necessary to make take with the tool or the means of control to follow the internal surface of the tapping and to the fact that the internal bore of these tapping has not always a cylindrical shape.

Le but de l'invention est donc de proposer un dispositif de support et de déplacement d'un outil à l'intérieur d'un piquage ayant une symétrie de révolution et traversant une paroi de façon à affleurer d'un côté de la paroi et à être saillant de l'autre côté, ce dispositif permettant une automatisation du travail effectué avec l'outil, un positionnement précis de l'outil par rapport à la surface à travailler à l'intérieur du piquage et une adaptation à différents types de profil et à différentes dimensions de cet alésage.The object of the invention is therefore to propose a device for supporting and moving a tool inside a nozzle having a symmetry of revolution and passing through a wall so as to be flush with one side of the wall and to be protruding on the other side, this device allowing automation of the work carried out with the tool, precise positioning of the tool relative to the surface to be worked inside the tapping and an adaptation to different types of profile and to different dimensions of this bore.

Dans ce but, le dispositif suivant l'invention comporte :

  • - un moyen de support et de centrage en forme d'étoile dont les branches sont disposées dans des directions radiales par rapport au piquage et portent des pièces de centrage destinées à s'engager dans l'orifice du piquage et des moyens de fixation sur la paroi, du côté où affleure le piquage,
  • - une pièce de centrage à l'extrémité saillante du piquage et à l'intérieur de celui-ci,
  • - le moyen de support et la pièce de centrage portant des paliers d'extrémité ayant pour axe commun l'axe du piquage,
  • - une barre porte-outil reliée à deux portions d'arbres alignées suivant l'axe du piquage tourillonnant chacun dans un des paliers d'extrémité et montée de façon décalée par rapport à l'axe du piquage dans une direction radiale,
  • - des moyens de mise en rotation de la barre porte-outil autour de l'axe du piquage,
  • - des moyens de guidage et de déplacement d'un outil dans la direction axiale et dans des directions radiales du piquage, portés par la barre porte-outil.
To this end, the device according to the invention comprises:
  • - a star-shaped support and centering means, the branches of which are arranged in radial directions with respect to the nozzle and carry centering pieces intended to engage in the orifice of the nozzle and fixing means on the wall, on the side where the nozzle is flush,
  • - a centering piece at the projecting end of the nozzle and inside it,
  • the support means and the centering piece carrying end bearings having the axis of the nozzle as a common axis,
  • - a tool bar connected to two portions of shafts aligned along the axis of the stitching, each journalling in one of the end bearings and mounted offset from the axis of the stitching in one direction radial,
  • means for rotating the tool bar around the axis of the nozzle,
  • - Means for guiding and moving a tool in the axial direction and in radial directions of the stitching, carried by the tool bar.

Afin de bien faire comprendre l'invention on va maintenant décrire à titre d'exemple non limitatif, en se référant aux figures jointes en annexe, un mode de réalisation du dispositif de support et de déplacement suivant l'invention dans le cas où ce dispositif est utilisé pour des opérations d'usinage et de contrôle dans des piquages d'une cuve d'un réacteur nucléaire à eau sous pression.

  • La figure 1 représente dans une vue en élévation avec coupe partielle, l'ensemble du dispositif en position à l'intérieur de l'alésage cylindrique d'un piquage formé dans la paroi d'une cuve de réacteur nucléaire à eau sous pression.
  • La figure 2 représente une vue en coupe suivant A-A de la figure 1 à une plus grande échelle.
  • La figure 3 représente une vue à plus grande échelle de la partie de droite de la figure 1.
  • La figure 4 représente une coupe suivant C-C de la figure 3.
  • La figure 5 représente une coupe suivant B-B de la figure 1.
  • La figure 6 représente, dans une vue en élévation aveccoupe partielle, l'ensemble du dispositif en position dans un alésage de forme cônique d'un piquage formé dans la paroi d'une cuve de réacteur à eau sous pression.
In order to clearly understand the invention, we will now describe, by way of nonlimiting example, with reference to the attached figures, an embodiment of the support and displacement device according to the invention in the case where this device is used for machining and control operations in connections from a tank of a pressurized water nuclear reactor.
  • Figure 1 shows in an elevational view with partial section, the entire device in position inside the cylindrical bore of a nozzle formed in the wall of a pressurized water nuclear reactor vessel.
  • 2 shows a sectional view along AA of Figure 1 on a larger scale.
  • FIG. 3 represents an enlarged view of the right part of FIG. 1.
  • FIG. 4 represents a section along CC of FIG. 3.
  • FIG. 5 represents a section along BB of FIG. 1.
  • Figure 6 shows, in an elevational view with partial section, the entire device in position in a tapered bore of a nozzle formed in the wall of a pressurized water reactor vessel.

Sur la figure 1, on voit une partie de la paroi 1 d'une cuve de réacteur à eau sous pression dans laquelle a été formé un piquage 2 qui affleure pratiquement la surface intérieure la de la paroi 1 de la cuve et qui est saillant par rapport à la paroi externe lb de cette cuve.In FIG. 1, a part of the wall 1 of a pressurized water reactor vessel is seen in which a nozzle 2 has been formed which is practically flush with the interior surface 1a of the wall 1 of the vessel and which projects relative to the external wall lb of this tank.

L'alésage interne 3 du piquage 2 est de forme cylindrique.The internal bore 3 of the tap 2 is of cylindrical shape.

Le dispositif de support et de déplacement d'un outil de meulage dans l'alésage du piquage représenté à la figure 1 comporte un châssis de manutention 6, un support en étoile 7, une barre porte-outil 8 et une cloche de centrage 9.The device for supporting and moving a grinding tool in the tapping bore shown in FIG. 1 comprises a handling chassis 6, a star support 7, a tool bar 8 and a centering bell 9.

Le châssis de manutention est constitué par une équerre formée de deux poutres 10 et 11 à section rectangulaire, la poutre 10 étant disposée verticalement et la poutre 11 horizontalement lorsque le dispositif est en position à l'intérieur de la cuve 1 verticale.The handling chassis is constituted by a square formed by two beams 10 and 11 of rectangular section, the beam 10 being arranged vertically and the beam 11 horizontally when the device is in position inside the vertical tank 1.

La poutre horizontale 11 porte une oreille de manutention 12 permettant le transport du dispositif dans son ensemble avec un pont roulant. Cette poutre 11 est en appui sur la partie supérieure de la cuve 1 par l'intermédiaire de deux appuis 13 constitués par des vis permettant le réglage de la verticalité du châssis de manutention en position sur la cuve. A l'extrémité de la poutre 11 est également disposé un moyen de fixation du châssis de manutention sur la cuve constitué par un bras 14 maintenu en position à l'extrémité de la poutre 11 par des broches 15 introduites dans des ouvertures du bras de fixation 14.The horizontal beam 11 carries a handling lug 12 allowing the transport of the device as a whole with an overhead crane. This beam 11 is supported on the upper part of the tank 1 by means of two supports 13 constituted by screws allowing the verticality of the handling chassis to be adjusted in position on the tank. At the end of the beam 11 is also arranged a means of fixing the handling chassis to the tank consisting of an arm 14 held in position at the end of the beam 11 by pins 15 inserted into openings of the fixing arm 14.

Une vis 16 permet de bloquer en position le châssis de manutention sur la partie supérieure de la cuve. Le châssis de manutention 6 porte également une armoire électrique 17 permettant l'alimentation des organes moteurs du dispositif.A screw 16 allows the handling chassis to be locked in position on the upper part of the tank. The handling chassis 6 also carries an electrical cabinet 17 allowing the supply of the motor components of the device.

Le châssis de manutention 6 est relié au dispositif de support en étoile 7 par boulonnage au niveau d'une plaque de jonction 18 assurant la liaison entre l'extrémité inférieure du châsis de manutention et l'une des branches du support en étoile 7.The handling frame 6 is connected to the star support device 7 by bolting at a junction plate 18 ensuring the connection between the lower end of the handling frame and one of the branches of the star support 7.

Le support 7 est constitué de trois branches 7a, 7b, 7c disposées avec pour plan de symétrie des plans contenant.l'axe xx' du piquage appelés plans radiaux.The support 7 consists of three branches 7a, 7b, 7c arranged with the plane of symmetry of the plans containing the axis xx 'of the stitching called radial planes.

Les branches 7a, 7b, 7c sont disposées avec une certaine inclinaison par rapport à la verticale de façon rayonnante par rapport au piquage lorsque le dispositif est en position comme représentée à la figure 1.The branches 7a, 7b, 7c are arranged with a certain inclination with respect to the vertical in a radiating manner with respect to the nozzle when the device is in position as shown in FIG. 1.

La branche 7a est constituée à son extrémité par une portion de poutre 19 permettant le raccord de la branche 7a.avec le châssis 6. Cette partie d'extrémité 19 de la branche 7a porte d'autre part une ventouse 20 dont la position est réglable par rapport à la branche 7a grâce à une vis 21. La poutre 19 porte également une équerre de centrage 23 destinée à venir s'engager dans l'orifice de l'alésage 3 affleurant la surface interne la de la cuve, cette équerre portant elle-même un ergot 24 permettant l'appui sur la surface interne la de la cuve.The branch 7a is formed at its end by a beam portion 19 allowing the connection of the branch 7a. With the frame 6. This end portion 19 of the branch 7a also carries a suction cup 20 whose position is adjustable relative to the branch 7a by means of a screw 21. The beam 19 also carries a centering bracket 23 intended to come to engage in the orifice of the bore 3 flush with the internal surface la of the tank, this bracket carrying it -even a lug 24 allowing the support on the internal surface of the tank.

De la même façon les branches 7b et 7c comportent respectivement des ventouses réglables 20b et 20c et des équerres d'appui 23b et 23c disposées à l'extrémité des branches obliques 7b et 7c pour permettre le centrage et l'accrochage du dispositif sur la surface interne de la cuve au niveau du piquage. Les ergots 24b et 24c associés aux bras 7b et 7c respectivement sont réglables grâce à des vérins 22.In the same way the branches 7b and 7c respectively comprise adjustable suction cups 20b and 20c and support brackets 23b and 23c arranged at the end of the oblique branches 7b and 7c to allow the centering and the attachment of the device on the surface internal of the tank at the nozzle. The pins 24b and 24c associated with the arms 7b and 7c respectively are adjustable by means of jacks 22.

Au centre de l'étoile est fixé un palier 25 dans lequel tourillonne un arbre 26 de direction axiale par rapport au piquage. L'arbre 26 est relié à la barre porte-outil 8 grâce à un dispositif 30 permettant un réglage d'inclinaison. Le dispositif 30 sera décrit plus en détail avec référence aux figures 3 et 4.At the center of the star is fixed a bearing 25 in which a shaft 26 is pivoted in an axial direction relative to the nozzle. The shaft 26 is connected to the tool bar 8 by means of a device 30 allowing an inclination adjustment. The device 30 will be described in more detail with reference to FIGS. 3 and 4.

A l'extrémité de l'arbre 26 est fixé un volant 31 permettant de faire tourner manuellement l'arbre 26 depuis un plancher de travail à l'intérieur de la cuve.At the end of the shaft 26 is fixed a flywheel 31 making it possible to manually rotate the shaft 26 from a work floor inside the tank.

L'extrémité de l'arbre 26 est également solihire d'une roue dentée 34 engrenant avec un pignon 35 entrainée par un moteur 36 porté par la branche 7a de l'étoile.The end of the shaft 26 is also solihire with a toothed wheel 34 meshing with a pinion 35 driven by a motor 36 carried by the branch 7a of the star.

La cloche de centrage 9 introduite dans l'extrémité saillante du piquage comporte une chemise cylindrique 38 portant sur sa surface externe des patins de glissement tels que 39 facilitant l'introduction de la cloche de centrage dans le piquage, et un joint gonflable 40 disposé à l'intérieur d'une rainure usinée dans une partie en saillie de la surface externe de la cloche 38.The centering bell 9 introduced into the protruding end of the nozzle has a cylindrical jacket 38 carrying on its outer surface sliding pads such as 39 facilitating the introduction of the centering bell in the nozzle, and an inflatable seal 40 disposed at the inside of a groove machined in a projecting part of the external surface of the bell 38.

A la partie centrale de l'enveloppe cylindrique 38 de la cloche est fixé un palier 41 constitué par un tube rendu solidaire du fond de la cloche 38 par des nervures 42.To the central part of the cylindrical envelope 38 of the bell is fixed a bearing 41 constituted by a tube made integral with the bottom of the bell 38 by ribs 42.

Dans le palier 41, est engagé un arbre 44 relié de façon articulée à l'extrémité de la barre porte-outil 8 ainsi qu'il sera expliqué en se référant à la figure 2. Les arbres 26 et 41 sont alignés et disposés axialement par rapport au piquage c'est-à-dire dans le cas de la figure 1 suivant une direction horizontale.In the bearing 41, is engaged a shaft 44 connected in an articulated manner to the end of the tool bar 8 as will be explained with reference to FIG. 2. The shafts 26 and 41 are aligned and arranged axially by relative to the stitching, that is to say in the case of FIG. 1 in a horizontal direction.

La barre porte-outil 8 est munie sur toute sa longueur d'une glissière à profil en queue d'aronde 46 et d'une vis 47 montée dans des paliers tels que 48 permettant le déplacement de l'outil 50 constitué par une meule et son moteur d'entrainement suivant la direction axiale du piquage.The tool bar 8 is provided over its entire length with a dovetail profile slide 46 and a screw 47 mounted in bearings such as 48 allowing the tool 50 to be displaced by a grinding wheel and its drive motor in the axial direction of the stitching.

L'outil sera décrit plus en détail avec référence à la figure 5.The tool will be described in more detail with reference to Figure 5.

Sur la figure 2, on voit l'axe 44 tourillonnant à l'intérieur du palier 41 disposé au centre de la cloche cylindrique 38 dans une direction axiale.In Figure 2, we see the axis 44 journalling inside the bearing 41 disposed in the center of the cylindrical bell 38 in an axial direction.

L'arbre 44 est solidaire d'une équerre 50 dont la partie horizontale permet de fixer la barre porte-outil 8 dans une position précise en ce qui concerne son orientation par rapport à l'arbre 44. Pour celà, la barre 8 est solidaire d'un man chon 51 dans l'alésage central duquel passe. un axe 52 fixé par rapport à l'équerre grâce à des vis 53 et par rapport au manchon 51 par un écrou 54 en prise sur l'extrémité supérieure filetée de l'arbre 52. Des ouvertures dans le manchon 51 et des clavettes 55 permettent de maintenir l'arbre 8 dans une position angulaire constante par rapport à l'arbre 44 de direction axiale, si l'on consière une rotation autour de l'axe 52.The shaft 44 is integral with a bracket 50, the horizontal part of which enables the tool-holder bar 8 to be fixed in a precise position with regard to its orientation relative to the shaft 44. For this, the bar 8 is integral a sleeve 51 in the central bore through which passes. an axis 52 fixed relative to the bracket by means of screws 53 and relative to the sleeve 51 by a nut 54 engaged on the threaded upper end of the shaft 52. Openings in the sleeve 51 and keys 55 allow to maintain the shaft 8 in a constant angular position with respect to the shaft 44 in the axial direction, if a rotation is made around the axis 52.

Dans tous les cas on voit que l'axe longitudinal yy' de la barre porte-outil 8 est décalé dans la direction radiale par rapport à l'axe xx' du piquage.In all cases it can be seen that the longitudinal axis yy 'of the tool bar 8 is offset in the radial direction relative to the axis xx' of the tapping.

L'arbre 44 est percé à son centre d'un canal 57 permettant l'alimentation en fluide de commande du joint gonflable 40.The shaft 44 is pierced at its center with a channel 57 allowing the supply of control fluid to the inflatable seal 40.

Sur les figures 3 et 4, on voit l'arbre 26 de direction axiale monté tourillonnant dans le palier 25 et relié par l'intermédiaire d'un manchon 65 et de raidisseurs 64 à une plaque 62, les raidisseurs 64 étant soudés d'une part au manchon 65 et d'autre part à la plaque 62.In Figures 3 and 4, we see the shaft 26 of axial direction mounted journalling in the bearing 25 and connected via a sleeve 65 and stiffeners 64 to a plate 62, the stiffeners 64 being welded with part to the sleeve 65 and secondly to the plate 62.

La plaque 62 comporte deux trous 63a à l'intérieur desquels passent des vis 63b permettant de solidariser l'arbre 26 et la barre porte-outil 8.The plate 62 has two holes 63a inside which pass screws 63b allowing the shaft 26 and the tool bar 8 to be secured.

La barre porte-outil 8 est solidaire d'une plaque de fixation 61 cependant qu'une plaque d'appui 60 est intercalée entre la plaque 62 solidaire de l'arbre 26 et la plaque 61 solidaire de la barre support d'outil 8.The tool bar 8 is secured to a fixing plate 61, however a support plate 60 is interposed between the plate 62 secured to the shaft 26 and the plate 61 secured to the tool support bar 8.

La plaque d'appui 60 est percée de trous 68 centrés sur l'axe vertical de cette plaque 60.The support plate 60 is pierced with holes 68 centered on the vertical axis of this plate 60.

La concordance entre les trous 63a-et 68 permet de solidariser les plaques 60 et 62 par l'intermédiaire des vis 63b.The correspondence between the holes 63a and 68 makes it possible to secure the plates 60 and 62 by means of the screws 63b.

La plaque 61 solidaire de la barre porte-outil 8 comporte deux jeux de deux trous filetés 67 dont l'écartement correspond à l'écartement des trous 63a de la plaque 62.The plate 61 secured to the tool bar 8 comprises two sets of two threaded holes 67 whose spacing corresponds to the spacing of the holes 63a of the plate 62.

Sur la figure 3 un premier jeu de trous 67 de la plaque 61 a été placé en concordance avec les trous63a et 68, si bien que les vis 63b permettent de solidariser l'arbre 26 et la barre porte-outil de façon que l'axe de cette barre porte-outil 8 soit parallèle à l'axe de l'arbre 26 c'est-à-dire à l'axe du piquage.In FIG. 3, a first set of holes 67 of the plate 61 has been placed in accordance with the holes 63a and 68, so that the screws 63b allow the shaft 26 and the tool bar to be secured so that the axis of this tool bar 8 is parallel to the axis of the shaft 26, that is to say to the axis of the nozzle.

Ceci correspond à la position de l'outil représentéesur la figure 1 où la mise en rotation de l'axe 26 par l'intermédiaire de la roue dentée 10 permet de faire décrire à la meule de l'outil 50 la surface interne cylindrique de l'alésage du piquage 2.This corresponds to the position of the tool represented in FIG. 1 where the rotation of the axis 26 by means of the toothed wheel 10 allows the grinding wheel of the tool 50 to describe the internal cylindrical surface of the tapping bore 2.

Le deuxième jeu de trous 67 lorsqu'il est amené en concordance avec les trous 63a et 68 permet de mettre la plaque 61 dans la position 61t représentée en traits discontinus sur la figure 3. Pour celà, il suffit de dévisser les vis 63b et de déplacer la plaque 61 solidaire de la barre porte-outil 8 vers le bas, puis de la faire tourner légèrement pour amener les trous 67 en concordance avec les trous 63a et 68. On peut alors solidariser à nouveau l'arbre 26 et la barre porte-outil 8 grâce aux vis 63b qu'on vient fixer dans le second jeu de trous 67 de la plaque 61.The second set of holes 67 when brought into concordance with the holes 63a and 68 allows the plate 61 to be placed in the position 61 t shown in broken lines in FIG. 3. For this, it suffices to unscrew the screws 63b and move the plate 61 secured to the tool bar 8 downward, then rotate it slightly to bring the holes 67 in line with the holes 63a and 68. We can then secure the shaft 26 and the bar again tool holder 8 thanks to the screws 63b which are fixed in the second set of holes 67 of the plate 61.

L'axe de la barre porte-outil 8 est alors incliné par rapport à l'axe de l'arbre 26, c'est-à-dire par rapport à l'axe du piquage 2.The axis of the tool bar 8 is then inclined relative to the axis of the shaft 26, that is to say relative to the axis of the tap 2.

Le dispositif est alors dans la position représentée sur la figure 6.The device is then in the position shown in FIG. 6.

La disposition des deux jeux de trous 67 sur la plaque 61 est choisie de façon à amener l'axe de la barre porte-outil suivant la direction d'une génératrice du cône constituant l'alésage du piquage 2' représenté à la figure 6.The arrangement of the two sets of holes 67 on the plate 61 is chosen so as to bring the axis of the tool-holder bar in the direction of a generator of the cone constituting the bore of the tap 2 'shown in FIG. 6.

En effet, dans les cuves de réacteur nucléaire à eau sous pression les piquages sont de deux types, les uns à alésage interne cylindrique, et les autres à alésage interne cônique. Avec une plaque comportant deux jeux de trous 67 comme représentée, on peut donc obtenir très rapidement et très facilement le passage de la position du dispositif, de la position d'usinage dans un alésage cylindrique à la position d'usinage dans un alésage cônique.In fact, in the pressurized water nuclear reactor vessels, the tappings are of two types, some with cylindrical internal bore, and the others with conical internal bore. With a plate comprising two sets of holes 67 as shown, it is therefore possible very quickly and very easily to pass from the position of the device, from the machining position in a cylindrical bore to the machining position in a tapered bore.

En effet, lors de la mise en rotation de l'arbre 26, la meule de l'outil 50 peut alors décrire une surface c8nique correspondant à la surface intérieure de l'alésage.In fact, when the shaft 26 is rotated, the grinding wheel of the tool 50 can then describe a conical surface corresponding to the interior surface of the bore.

En se reportant aux figures 1 et 5, on voit l'ensemble de l'outil 50 constitué par une meule 70 montée sur un axe 71 entraînée par un moteur 72 par l'intermédiaire d'une courroie 73.Referring to FIGS. 1 and 5, the assembly of the tool 50 is seen consisting of a grinding wheel 70 mounted on an axis 71 driven by a motor 72 by means of a belt 73.

L'ensemble de l'outillage est fixé sur un bâti 74 monté glissant sur la glissière en queue d'aronde 46 solidaire de la barre porte-outil 8. D'autre part, le bâti 74 porte un écrou 75 en prise avec la vis sans fin 47 entraînée en rotation par un moteur porté par la barre porte-outil 8.All of the tools are fixed to a frame 74 mounted sliding on the dovetail slide 46 secured to the tool bar 8. On the other hand, the frame 74 carries a nut 75 in engagement with the screw endless 47 driven in rotation by a motor carried by the tool bar 8.

De cette façon, l'ensemble de l'outillage peut se déplacer axialement dans l'alésage en se déplaçant le long de la glissière 46 de la barre porte-ouil 8.In this way, all of the tools can move axially in the bore by moving along the slide 46 of the tool holder bar 8.

L'axe 71 de la meule 70 est d'autre part monté rotatif dans un fût 77 qui peut être déplacé suivant son axe par un vérin 78, par rapport au bâti 74 de l'outillage. On réalise ainsi les mouvements de pénétration de la meule dans le métal de revêtement de l'alésage du piquage.The axis 71 of the grinding wheel 70 is on the other hand rotatably mounted in a barrel 77 which can be moved along its axis by a jack 78, relative to the frame 74 of the tool. Penetration movements are thus carried out of the grinding wheel in the coating metal of the tapping bore.

Un jeu de poulies 79 permet de faire parvenir les fils électriques ou tubes d'alimentation en fluide aux différents moteurs ou vérins portés par la barre porte-outil et l'outillage.A set of pulleys 79 makes it possible to send the electrical wires or fluid supply tubes to the various motors or jacks carried by the tool bar and the tools.

Pour la mise en service du dispositif de support et de déplacement qui vient d'être décrit, on commence par effectuer sur le dispositif les différents réglages permettant de l'adapter au piquage sur lequel/on effectue l'usinage.For the commissioning of the support and displacement device which has just been described, one begins by making on the device the various adjustments making it possible to adapt it to the stitching on / which one performs the machining.

C'est ainsi qu'on règle les équerres 23 à l'ouverture du piquage, qu'on choisit une cloche 38 d'un diamètre correspondant au diamètre interne du piquage et qu'on choisit l'inclinaison de la barre porte-outil 8 par rapport à l'axe de rotation de cette barre de façon à s'adapter à la géomè- trie du piquage. Un outil convenable pour l'usinage à effectuer est d'autre part placé sur la barre porte-outil.This is how the squares 23 are adjusted when the nozzle is opened, a bell 38 with a diameter corresponding to the internal diameter of the nozzle is chosen and the inclination of the tool bar 8 is chosen. relative to the axis of rotation of this bar so as to adapt to the geometry of the nozzle. On the other hand, a tool suitable for the machining to be carried out is placed on the tool bar.

Ces différents réglages effectués, on place l'outil en position relevée et les ventouses en position arrière.These various adjustments made, the tool is placed in the raised position and the suction cups in the rear position.

On introduit alors le dispositif dans le piquage en effectuant sa manutention grâce à l'oreille de levage 12 jusquau moment où la cloche est dans sa position définitive au niveau de l'extrémité de la partie saillante du piquage. Les ergots 24 sont mis en position contre la paroi interne de la cuve et l'on réalise le gonflage du joint 40 de la cloche 28 en envoyant le fluide de commande du joint par le canal central 57 de l'arbre 44.The device is then introduced into the nozzle by carrying out its handling using the lifting lug 12 until the bell is in its final position at the end of the protruding part of the nozzle. The pins 24 are placed in position against the internal wall of the tank and the seal 40 of the bell 28 is inflated by sending the seal control fluid through the central channel 57 of the shaft 44.

On effectue alors le réglage de position et la fixation de l'outil grâce à l'arbre 14 et aux vis 12 et 16.The position is then adjusted and the tool is fixed using the shaft 14 and the screws 12 and 16.

Les ventouses 20 sont alors réglées par action sur les vis 21 de façon à ce que ces ventouses viennent en contact avec la paroi interne de la cuve. Ces ventouses 20 ont évidemment une surface de contact constituant une portion de cylindre pour leur permettre d'épouser parfaitement la surface interne de la cuve.The suction cups 20 are then adjusted by action on the screws 21 so that these suction cups come into contact with the internal wall of the tank. These suction cups 20 obviously have a contact surface constituting a cylinder portion to allow them to perfectly match the internal surface of the tank.

Les ventouses sont alors mises en dépression, ce qui permet de maintenir le dispositif en place indépendamment de tout autre appui. On choisit alors les paramètres de travail de l'outil qui est mis en route à partir d'une boîte de commande disposée sur la partie du dispositif qui se trouve à l'intérieur de la cuve.The suction cups are then placed under vacuum, which makes it possible to keep the device in place independently of any other support. One then chooses the working parameters of the tool which is started from a control box arranged on the part of the device which is inside the tank.

Dans le cas où l'on désire rectifier toute la surface interne du piquage, on peut réaliser une avance pas à pas de la meule dans la direction axiale et faire effectuer une rotation d'un peu plus de 3600 à la barre porte-outil pour réaliser un balayage complet de la surface avec un léger recouvrement. Chacune des avances pas à pas est évidemment choisie de façon à ce que son amplitude soit inférieure à la largeur de travail de la meule.In the case where it is desired to rectify the entire internal surface of the tapping, it is possible to carry out a step-by-step advance of the grinding wheel in the axial direction and to make a rotation of slightly more than 360 ° tool bar to carry out a complete sweep of the surface with a slight overlap. Each of the step-by-step advances is obviously chosen so that its amplitude is less than the working width of the grinding wheel.

Dans ce cas, après la mise en place de l'outil et la mise en dépression des ventouses 20, on démonte les équerres de centrage 23, ce qui permet de réaliser un balaage de la surface interne du piquage par la meule jusqu'à l'extrémité de ce piquage affleurant la surface interne de la cuve.In this case, after the tool is put in place and the suction cups 20 are depressed, the centering brackets 23 are dismantled, which makes it possible to sweep the internal surface of the stitching by the grinding wheel up to l end of this nozzle flush with the internal surface of the tank.

On voit que les principaux avantages du dispositif suivant l'invention sont de permettre une automatisation des opérations d'usinage dans un piquage et l'utilisation d'outils plus encombrants, de disposer d'une puissance importante en bout d'arbre et de permettre une adaptation à diverses géométries du piquage.We see that the main advantages of the device according to the invention are to allow automation of the machining operations in a tapping and the use of more bulky tools, to have a large power at the end of the shaft and to allow adaptation to various geometries of the stitching.

D'autre part, dans le cas d'une rectification de la surface interne du piquage à la meule, la régularité du meulage par rapport à un meulage manuel permet d'obtenir une surface de très bonne qualité.On the other hand, in the case of a rectification of the internal surface of the grinding with the grinding wheel, the regularity of the grinding compared to a manual grinding makes it possible to obtain a surface of very good quality.

Il est également possible d'isoler totalement le piquage pendant les opérations qu'on y effectue grâce aux joints gonflables de la cloche de centrage.It is also possible to completely isolate the nozzle during the operations that are carried out there thanks to the inflatable joints of the centering bell.

Enfin, l'utilisation du dispositif suivant l'invention est particulièrement simple et particulièrement sûre.Finally, the use of the device according to the invention is particularly simple and particularly safe.

Mais l'invention ne se limite pas au mode de réalisation qui vient d'être décrit, elle en comporte au contraire toutes les variantes et l'on peut imaginer l'utilisation de moyens équivalents à ceux qui viennent d'être décrits sans pour autant sortir du cadre de l'invention.However, the invention is not limited to the embodiment which has just been described, on the contrary it includes all the variants thereof and one can imagine the use of means equivalent to those which have just been described without necessarily depart from the scope of the invention.

C'est ainsi qu'au lieu d'utiliser une meule pour les opérations de rectification du piquage on peut utiliser une bande abrasive passant sur une poulie et une roue d'appui entraînées en rotation par un moteur.Thus, instead of using a grinding wheel for the operations of grinding of the stitching, it is possible to use an abrasive band passing over a pulley and a support wheel driven in rotation by a motor.

Au lieu d'un outil de meulage, on peut disposer sur la barre porte-outil un outillage permettant d'effectuer une opération quelconque à l'intérieur du piquage à un endroi: quelconque de l'alésage de ce piquage.Instead of a grinding tool, a tool can be placed on the tool bar allowing any operation to be carried out inside the nozzle at a location: any of the bore of this nozzle.

On peut d'autre part utiliser des moyens de fixation différents de ventouses accrochées contre la paroi interne où débouche le piquage. On peut également imaginer d'autres m)des de réalisation du dispositif à inclinaison variable de la barre porce-outil.On the other hand, it is possible to use different fixing means for suction cups hung against the internal wall where the nozzle opens. One can also imagine other m) embodiments of the device with variable inclination of the tool-holding bar.

L'utilisation du dispositif selon l'invention n'est bien sûr pas limitée à des opérations d'usinage et l'on peut effectuer des contrôles non destructifs à l'intérieur d'un piquage en remplaçant l'outil monté sur la barre porte-outil par un moyen de contrôle qui peut être déplacé dans des positions permettant le contrôle de toute la surface interne de l'alésage.The use of the device according to the invention is of course not limited to machining operations and checks can be carried out non-destructive inside a tapping by replacing the tool mounted on the tool bar by a control means which can be moved into positions allowing the control of the entire internal surface of the bore.

Enfin, on peut concevoir des applications du dispositif suivant l'invention dans d'autres domaines que la construction des cuves de réacteurs nucléaires, par exemple la construction d'autres récipients forgés ou chaudronnés de grande dimension comportant des piquages de forme quelconque.Finally, it is possible to conceive of applications of the device according to the invention in fields other than the construction of the nuclear reactor vessels, for example the construction of other large forged or boiled containers having nozzles of any shape.

Claims (6)

1.- Dispositif de support et de déplacement d'un outil à l'intérieur d'un piquage ayant une symétrie de révolution et traversant une paroi de façon à affleurer d'un côté de la paroi et à être saillant de l'autre coté caractérisé par le fait qu'il comporte : - un moyen de support et de centrage (7) en forme d'étoile, dont les branches (7a, 7b, 7c) sont disposées rayonnantes par rapport au piquage (2) et portent des pièces de centrage (23) destinées à s'engager dans l'orifice (3) du piquage (2) et des moyens de fixation (20) sur la paroi (la) du côté où affleure le piquage (2), - une pièce de centrage (9) à l'extrémité saillante du piquage (2) et à l'intérieur de celui-ci, - le moyen de support (7) et la pièce de centrage (9) portant des paliers d'extrémité (25, 41) ayant pour axe commun l'axe du piquage (2), - une barre porte-outil (8) reliée à deux portions d'arbres (26, 44) alignées suivant l'axe du piquage tourillonnant chacun dans un des paliers d'extrémité (25, 41) et montée de façon décalée par rapport à l'axe du piquage (2) dans une direction radiale, - des moyens (34, 35, 36) de mise en rotation de la barre porte-outil (8) autour de l'axe du piquage (27), - des moyens (46, 47) de guidage et de déplacement d'un outil (50) dans la direction axiale et dans des directions radiales du piquage (2) portés par la barre porte-outil (8). 1.- Device for supporting and moving a tool inside a tap having a symmetry of revolution and passing through a wall so as to be flush with one side of the wall and protruding from the other side characterized by the fact that it comprises: - a star-shaped support and centering means (7), the branches (7a, 7b, 7c) of which are arranged radiant with respect to the nozzle (2) and carry centering pieces (23) intended for engage in the orifice (3) of the nozzle (2) and fixing means (20) on the wall (la) on the side where the nozzle is flush (2), - a centering piece (9) at the projecting end of the nozzle (2) and inside of it, the support means (7) and the centering piece (9) carrying end bearings (25, 41) having the axis of the nozzle (2) as their common axis, - a tool bar (8) connected to two portions of shafts (26, 44) aligned along the axis of the stitching, each journalling in one of the end bearings (25, 41) and mounted offset from the axis of the tap (2) in a radial direction, means (34, 35, 36) for rotating the tool bar (8) around the axis of the tap (27), - Means (46, 47) for guiding and moving a tool (50) in the axial direction and in radial directions of the tap (2) carried by the tool-holder bar (8). 2.- Dispositif de support suivant la revendication 1 caractérisé par le fait que la barre porte-outil (8) est reliée aux portions d'arbres (26,44) par l'intermédiaire de dispositifs (51, 52 et 30) permettant ltorientation de la barre porte-outil (8) soit parallèlement à l'axe du piquage (2) soit suivant au moins une direction inclinée par rapport à cet axe pour faire décrire une surface cônique à l'outil (50) lors des déplacements en rotation de la barre porte-outil (8) et des déplacements axiaux de l'outil (50).2.- Support device according to claim 1 characterized in that the tool bar (8) is connected to the portions of shafts (26,44) by means of devices (51, 52 and 30) allowing the t orientation of the tool bar (8) either parallel to the axis of the tap (2) or in at least one direction inclined relative to this axis to describe a conical surface to the tool (50) during movement in rotation of the tool bar (8) and axial displacements of the tool (50). 3.- Dispositif de support suivant la revendication 2 caractérisé par le fait que la barre porte-outil (8) est reliée à la portion d'arbre (44) montée dans le palier (41) solidaire de la pièce de centrage (9) par l'intermédiaire d'un axe (52) perpendiculaire à l'axe de ce palier (41) permettant l'orientation de la barre porte-outil (8) par rapport à l'axe du palier (41) et à la portion d'arbre (26) montée dans le palier (25) relié au support en étoile (7) par l'intermédiaire de plaques de fixation (61, 62) portées l'une par la barre porte-outil (8) et l'autre par la portion d'arbre (26) dont l'une au moins (61) comporte au moins deux jeux de trous de fixation (67) par l'intermédiaire de vis (63b) pour l'obtention de deux inclinaisons différentes de la barre porte-outil (8) par rapport à l'axe du piquage (2).3.- Support device according to claim 2 characterized in that the tool holder bar (8) is connected to the shaft portion (44) mounted in the bearing (41) integral with the centering piece (9) by means of an axis (52) perpendicular to the axis of this bearing (41) allowing the orientation of the tool bar (8) relative to the axis of the bearing (41) and to the portion shaft (26) mounted in the bearing (25) connected to the star support (7) by means of fixing plates (61, 62) carried one by the tool bar (8) and the other by the shaft portion (26), at least one of which (61) comprises at least two sets of fixing holes (67) by through screws (63b) for obtaining two different inclinations of the toolbar (8) relative to the axis of the tap (2). 4.- Dispositif de support suivant l'une quelconque des revendications 1, 2 et 3 caractérisé par le fait que le support en étoile (7) est relié à un châssis de manutention et de support (6) en forme d'équerre susceptible de venir reposer sur la partie supérieure de la paroi (1) traversée par le piquage (2).4.- Support device according to any one of claims 1, 2 and 3 characterized in that the star support (7) is connected to a handling and support frame (6) in the form of a square capable of come to rest on the upper part of the wall (1) through which the nozzle (2) passes. 5.- Dispositif suivant l'une quelconque des revendications 1, 2, 3 et 4 caractérisé par le fait que les moyens de fixation du support en étoile (7) sur la paroi (1) du côté (1a) où affleure le piquage (2) sont constitués par des ventouses à dépression (20).5.- Device according to any one of claims 1, 2, 3 and 4 characterized in that the means for fixing the star support (7) on the wall (1) on the side (1a) where the nozzle is flush ( 2) are constituted by vacuum suction cups (20). 6.- Dispositif de support suivant l'une quelconque des revendications 1, 2, 3, 4 et 5 caractérisé par le fait que la pièce de centrage (9) disposée à l'extrémité saillante du piquage (2) est constituée par une cloche cylindrique (38) portant un joint d'étanchéité gonflable (40) sur sa surface externe.6.- Support device according to any one of claims 1, 2, 3, 4 and 5 characterized in that the centering piece (9) disposed at the projecting end of the tap (2) is constituted by a bell cylindrical (38) carrying an inflatable seal (40) on its outer surface.
EP81400600A 1980-04-15 1981-04-15 Means for supporting and guiding a tool at the interior of a hole Expired EP0038270B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81400600T ATE6222T1 (en) 1980-04-15 1981-04-15 MEANS OF SUPPORTING AND SHIFTING A TOOL ON THE INSIDE OF A HOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8008430 1980-04-15
FR8008430A FR2480167A1 (en) 1980-04-15 1980-04-15 DEVICE FOR SUPPORTING AND MOVING A TOOL WITHIN A FITTING

Publications (3)

Publication Number Publication Date
EP0038270A2 true EP0038270A2 (en) 1981-10-21
EP0038270A3 EP0038270A3 (en) 1981-11-04
EP0038270B1 EP0038270B1 (en) 1984-02-15

Family

ID=9240903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400600A Expired EP0038270B1 (en) 1980-04-15 1981-04-15 Means for supporting and guiding a tool at the interior of a hole

Country Status (10)

Country Link
US (1) US4419847A (en)
EP (1) EP0038270B1 (en)
JP (1) JPS56163493A (en)
AT (1) ATE6222T1 (en)
BR (1) BR8102177A (en)
DE (1) DE3162234D1 (en)
ES (1) ES501324A0 (en)
FI (1) FI66556C (en)
FR (1) FR2480167A1 (en)
YU (1) YU93081A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0673703A1 (en) * 1994-03-23 1995-09-27 Compagnie Generale Des Matieres Nucleaires Welding device of a sleeve in a branch pipe of a circular piping having difficult access
DE10014248A1 (en) * 2000-03-22 2001-10-18 Rehau Ag & Co Medical tools

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310947A1 (en) * 1983-03-23 1986-03-06 Kraftwerk Union AG, 4330 Mülheim REPAIR DEVICE FOR A REACTOR PRESSURE TANK
FR2611561A1 (en) * 1987-02-26 1988-09-09 Creation Mecanismes Aut Asserv DEVICE FOR BRUSHING TAPPED BORES
JPS6433499U (en) * 1987-08-25 1989-03-01
FR2629250A1 (en) * 1988-03-25 1989-09-29 Electricite De France THREADED HOLES CLEANING MACHINE, IN PARTICULAR THREADED HOLES FOR THE PUNCH HOLE AND HOLES HOLE OF STEAM GENERATORS OF NUCLEAR POWER PLANTS
JPH026699U (en) * 1988-06-28 1990-01-17
JPH02164690A (en) * 1988-12-20 1990-06-25 Mitsubishi Heavy Ind Ltd Reaction fin supporting structure

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US1506504A (en) * 1921-12-14 1924-08-26 Joseph B Ruatti Machine for finishing journal frames
US2235924A (en) * 1940-04-02 1941-03-25 Hopper Machine Works Inc Portable angular boring bar with grinder
US2348505A (en) * 1943-09-24 1944-05-09 Voerge John Nicholas Sandblasting
GB995555A (en) * 1961-04-18 1965-06-16 Derefa Ets Improvements in or relating to boring or turning apparatus
US3571985A (en) * 1965-10-20 1971-03-23 Capvac Ind Inc Cylinder treating method
US3587194A (en) * 1968-08-02 1971-06-28 Champion Corp Tap cutter
FR2285212A1 (en) * 1974-09-17 1976-04-16 Okano Valve Seizo Kk DEVICE FOR AUTOMATIC BREAK-IN OF VALVE SEATS
FR2356478A1 (en) * 1976-07-01 1978-01-27 Rockwell International Corp PORTABLE MACHINE FOR REALIZING, RECTIFYING AND RUNNING VALVE SEATS ON SITE
US4161127A (en) * 1977-04-08 1979-07-17 Tiffin Patrick L Remotely operable portable boring tool

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US1365149A (en) * 1919-06-13 1921-01-11 Dale L Breed Boiler-cleaning apparatus
US1814078A (en) * 1930-02-03 1931-07-14 Charles B Cole Machine for boring cylinders
US2188720A (en) * 1938-11-25 1940-01-30 Robert J Mcquade Abrading machine
US2297074A (en) * 1941-03-17 1942-09-29 Allen C Rohrdanz Manhole grinding machine
US2372341A (en) * 1942-09-01 1945-03-27 Walter A Shanley Grinding machine
US2521210A (en) * 1946-11-18 1950-09-05 Charles A Fulmer Cylinder grinding machine
US3218762A (en) * 1964-08-31 1965-11-23 Charles C Renfroe Power driven ridge reamer
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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1506504A (en) * 1921-12-14 1924-08-26 Joseph B Ruatti Machine for finishing journal frames
US2235924A (en) * 1940-04-02 1941-03-25 Hopper Machine Works Inc Portable angular boring bar with grinder
US2348505A (en) * 1943-09-24 1944-05-09 Voerge John Nicholas Sandblasting
GB995555A (en) * 1961-04-18 1965-06-16 Derefa Ets Improvements in or relating to boring or turning apparatus
US3571985A (en) * 1965-10-20 1971-03-23 Capvac Ind Inc Cylinder treating method
US3587194A (en) * 1968-08-02 1971-06-28 Champion Corp Tap cutter
FR2285212A1 (en) * 1974-09-17 1976-04-16 Okano Valve Seizo Kk DEVICE FOR AUTOMATIC BREAK-IN OF VALVE SEATS
FR2356478A1 (en) * 1976-07-01 1978-01-27 Rockwell International Corp PORTABLE MACHINE FOR REALIZING, RECTIFYING AND RUNNING VALVE SEATS ON SITE
US4161127A (en) * 1977-04-08 1979-07-17 Tiffin Patrick L Remotely operable portable boring tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0673703A1 (en) * 1994-03-23 1995-09-27 Compagnie Generale Des Matieres Nucleaires Welding device of a sleeve in a branch pipe of a circular piping having difficult access
FR2717721A1 (en) * 1994-03-23 1995-09-29 Cogema Device for welding a sleeve in a nozzle of a circular pipe difficult to access.
DE10014248A1 (en) * 2000-03-22 2001-10-18 Rehau Ag & Co Medical tools

Also Published As

Publication number Publication date
ATE6222T1 (en) 1984-03-15
US4419847A (en) 1983-12-13
JPS623398B2 (en) 1987-01-24
ES8303791A1 (en) 1983-02-01
ES501324A0 (en) 1983-02-01
YU93081A (en) 1984-02-29
EP0038270B1 (en) 1984-02-15
BR8102177A (en) 1981-12-01
FI66556C (en) 1984-11-12
FI66556B (en) 1984-07-31
FI811138L (en) 1981-10-16
EP0038270A3 (en) 1981-11-04
FR2480167A1 (en) 1981-10-16
JPS56163493A (en) 1981-12-16
FR2480167B1 (en) 1983-12-02
DE3162234D1 (en) 1984-03-22

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