EP0506932A1 - Method and device for mounting an o-ring seal in a groove - Google Patents

Method and device for mounting an o-ring seal in a groove

Info

Publication number
EP0506932A1
EP0506932A1 EP19910919346 EP91919346A EP0506932A1 EP 0506932 A1 EP0506932 A1 EP 0506932A1 EP 19910919346 EP19910919346 EP 19910919346 EP 91919346 A EP91919346 A EP 91919346A EP 0506932 A1 EP0506932 A1 EP 0506932A1
Authority
EP
European Patent Office
Prior art keywords
ring
diameter
rod
recess
piston
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.)
Withdrawn
Application number
EP19910919346
Other languages
German (de)
French (fr)
Inventor
S.A. Hobac
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.)
Hobac SA
Original Assignee
S.A. Hobac
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 S.A. Hobac filed Critical S.A. Hobac
Publication of EP0506932A1 publication Critical patent/EP0506932A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028—Tools for removing or installing seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/08—Machines for placing washers, circlips, or the like on bolts or other members
    • B23P19/084—Machines for placing washers, circlips, or the like on bolts or other members for placing resilient or flexible rings, e.g. O-rings, circlips

Definitions

  • the subject of the present invention is a method and a device for placing an O-ring in the groove of a part or part of a part of revolution.
  • O-ring packings commonly called O-rings or O-ring seals
  • O-rings have been placed in their grooves manually or mechanically using a tool.
  • the present invention aims to set up an O-ring in a groove, in particular a very small O-ring in the groove of a piston, without using any tool or other solid member to enlarge and push the seal. toric.
  • the method according to the invention is characterized in that the O-ring is threaded on an auxiliary cylindrical rod of diameter substantially equal to that of the O-ring, that the end of the part of revolution is applied coa ⁇ ially against the end of said rod and that the O-ring of the rod is passed over the part of revolution by means of compressed air.
  • the device according to the invention is characterized in that it comprises a source of compressed air, a cylinder connected to this source of compressed air and containing a piston secured to a rod with a diameter at least approximately equal to the internal diameter of the O-ring and projecting from the cylinder body and a spring working in compression between the bottom of the cylinder and the piston.
  • the piston and its rod having grooves
  • the end of the cylinder body surrounding the piston rod having a cylindrical recess coaxial with the rod and of a diameter such that it allows the compressed O-ring to pass between the part of revolution and the wall of the recess, the stroke of the piston being such that when the resort is completely compressed, the end of the piston rod is located in the recess and exceeds the bottom of this recess by a length equal to the diameter of the section of the O-ring.
  • the compressed air sent into the grooves of the latter has the effect of pushing the O-ring seal first radially. which forces it to extend, then axially until it relaxes in the groove of the part of revolution.
  • the means for extending the O-ring and pushing it into its groove is therefore only constituted by compressed air. The latter does not risk damaging the O-ring.
  • the method according to the invention can be used both for large O-rings and for very small O-rings.
  • FIG. 1 is a schematic view of a device for placing an O-ring on a piston, FIG. 1a being a front view of the cylinder 1.
  • FIGS 2 to 5 are sectional views of the essential part of the device of Figure 1 in successive operating positions.
  • Figure 6 is a partial view, in section, of a first alternative embodiment of the device according to Figures 1 to 5 for the establishment of an O-ring in a groove located at a certain distance from the end d 'an axe.
  • Figure 7 is a partial view, in section, of a second alternative embodiment of the device for the establishment of an O-ring on a piston located at a certain distance from the end of an axis.
  • the device as shown at rest in Figures 1 and 2, comprises a cylinder 1 in which is mounted a piston 2 provided with a rod 3 and held in abutment against one end of the cylinder 1 by a spring 4 working in compression between the piston 2 and a plug 5 screwed to the end of the cylinder 1.
  • This plug 5 is pierced with an axial hole 6 and it is connected by a duct 7 to a source of compressed air 8 provided with a suitable valve.
  • the piston 2 and the rod 3 have four longitudinal grooves 9. 10, 11 and 12 ( Figures la and 2) extending over the entire length of the piston and its rod.
  • the end of the body of the cylinder 1 located on the side of the rod 3 has a cylindrical recess 13.
  • the rod 3 At rest, the rod 3 exceeds this end of the body of the cylinder 1.
  • the length of the piston 2 and its rod 3 are such that when the spring 4 is completely compressed (FIG. 3), the rod 3 projects beyond the bottom of the recess 13 by a length equal to the diameter of the section of the O-ring 14 which must be placed in place.
  • the diameter of the recess 13 it is determined on the one hand by the section of the O-ring 14 and on the other hand by the diameter of the part of revolution 15 in the groove 16 from which the O-ring 14 must be put in place .
  • the diameter of the recess 13 must in all cases be less than the diameter of the part of revolution 15 increased by twice the diameter of the section of the O-ring 14, so that the O-ring is compressed between the part of revolution 15 and the wall of the recess 13.
  • the diameter of the recess 13 is preferably equal to the diameter of the part 15 increased from 1.4 to 1.8 times the diameter of the section of the O-ring.
  • the O-ring 14 is first of all threaded by hand onto the end of the rod 3 ( Figure 2).
  • the internal diameter of the O-ring 14 being equal to the diameter of the rod 3, this installation is done very easily. It is obvious that this equality of diameters should only be very approximate.
  • the piece of revolution 15 is then brought coaxially, by means of an automatic mechanism, against the end of the rod 3 and with sufficient pressure to push back the rod 3 and completely compress the spring 4.
  • the end of the rod 3 is located inside the recess 13 and exceeds the bottom of this recess by a length equal to or slightly less than the diameter of the section of the O-ring 14. This O-ring is therefore caught between the bottom of the recess 13 and the end of part 15.
  • the depth of the recess 13 is a function of the length of the shoulder 17.
  • This shoulder can be relatively long in the case of a groove formed on a rod or an axis.
  • An example is shown in FIG. 6.
  • the part 17 ′ separating the end of the part 15 from the groove 16 is relatively long. Consequently, the depth of the hollow 13 '. corresponding to the recess 13, is also relatively large.
  • the device shown in Figure 6 is identical to that shown in Figures 2 to 5.
  • Figure 6 shows the device in its compressed position, as in Figure 3. Under the effect of compressed air. the O-ring 14 is driven between the part 17 "and the wall of the cylindrical recess 13 'to finally come to relax in the groove 16.
  • FIG. 7 illustrates the positioning of a tori ⁇ that 14 in a groove 18 formed between two spans 19 and 20 of an axis 21.
  • the internal diameter of the groove is therefore equal to the diameter of the shaft 21.
  • the groove 18 is located at a certain distance from the end of the shaft 21.
  • the chamber 13 "', corresponding to the chamber 13" of Figure 6, is therefore also deep.
  • This recess 13 "' opens into a second part 22 whose diameter is equal to the diameter of the recess 13' 'increased by the difference between the diameter of the bearing surface 19 and the diameter of the shaft 21.
  • the space between the shaft 21 and the wall of the chamber 13 "' is less than the diameter of the section of the O-ring 14, for example equal to the diameter of the shaft 21 increased from 1.4 to 1.8 times the diameter of the section of the O-ring.
  • Figure 7 shows the device in its compressed position, like Figure 3. Under the effect of compressed air, the O-ring 14 first extends to the diameter of the recess 13 '' and it is driven between the shaft 21 and the wall of the recess 13 '"until it comes up against the bearing surface 19 in the recess 22. It can then extend further to pass over the bearing surface 19 and come to relax partially in the throat 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Actuator (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

Le joint torique (14) est enfilé à l'extrémité d'une tige de piston cannelée (3) qui est repoussée à l'intérieur d'un cylindre (1) en comprimant un ressort (4) par la pièce (15) destinée à recevoir le joint torique dans une gorge (16). L'extrémité de la tige (3) est alors à l'intérieur d'une creusure cylindrique (13). De l'air comprimé envoyé dans le cylindre (1) a pour effet de faire passer le joint torique (14) dans la gorge (16).The O-ring (14) is threaded at the end of a grooved piston rod (3) which is pushed back inside a cylinder (1) by compressing a spring (4) by the part (15) intended receiving the O-ring in a groove (16). The end of the rod (3) is then inside a cylindrical recess (13). Compressed air sent into the cylinder (1) causes the O-ring (14) to pass through the groove (16).

Description

Procédé et dispositif pour la mise en place d'un joint torique dans une gorge.Method and device for placing an O-ring in a groove.
La présente invention a pour objet un procédé et un dispositif pour la mise en place d'un joint torique dans la gorge d'une pièce ou partie de pièce de révolution.The subject of the present invention is a method and a device for placing an O-ring in the groove of a part or part of a part of revolution.
Jusqu'ici, les garnitures de joint toriques, appelées communément joints toriques ou joints O-ring, ont été mises en place dans leur gorge manuellement ou mécani¬ quement à l'aide d'un outil. Dans tous les cas il est nécessaire d'agrandir le diamètre du joint torique pour l'amener au diamètre extérieur de la gorge. Dans le cas d'un joint torique de très petites dimensions, le risque est grand de blesser ce joint torique avec l'outil utilisé pour l'agrandir et le pousser dans sa gorge.So far, the O-ring packings, commonly called O-rings or O-ring seals, have been placed in their grooves manually or mechanically using a tool. In all cases it is necessary to enlarge the diameter of the O-ring to bring it to the outside diameter of the groove. In the case of a very small O-ring, there is a great risk of injuring this O-ring with the tool used to enlarge it and push it into its groove.
La présente invention a pour but de mettre en place un joint torique dans une gorge, en particulier un joint torique de très petite dimension dans la gorge d'un piston, sans faire intervenir d'outil ou autre organe solide pour agrandir et pousser le joint torique.The present invention aims to set up an O-ring in a groove, in particular a very small O-ring in the groove of a piston, without using any tool or other solid member to enlarge and push the seal. toric.
Le procédé selon l'invention est caractérisé en ce qu'on enfile le joint torique sur une tige cylindrique auxiliaire de diamètre sensiblement égal à celui du joint torique, qu'on applique l'extrémité de la pièce de révolution coaκialement contre l'extrémité de ladite tige et qu'on fait passer le joint torique de la tige sur la pièce de révolution au moyen d'air comprimé. Le dispositif selon l'invention est caractérisé par le fait qu'il comprend une source d'air comprimé, un cylindre relié à cette source d'air comprimé et contenant un piston solidaire d'une tige de diamètre au moins approximativement égal au diamètre intérieur du joint torique et faisant saillie du corps du cylindre et un ressort travaillant en compression entre le fond du cylindre et le piston. le piston et sa tige présentant des cannelures, et l'extrémité du corps du cylindre entourant la tige du piston présentant une creusure cylindrique coaxiale à la tige et de diamètre tel qu'il permet au joint torique comprimé de passer entre la pièce de révolution et la paroi de la creusure, la course du piston étant telle que lorsque le resort est complètement comprimé, l'extrémité de la tige du piston est située dans la creusure et dépasse le fond de cette creusure d'une longueur égale au diamètre de la section du joint torique.The method according to the invention is characterized in that the O-ring is threaded on an auxiliary cylindrical rod of diameter substantially equal to that of the O-ring, that the end of the part of revolution is applied coaκially against the end of said rod and that the O-ring of the rod is passed over the part of revolution by means of compressed air. The device according to the invention is characterized in that it comprises a source of compressed air, a cylinder connected to this source of compressed air and containing a piston secured to a rod with a diameter at least approximately equal to the internal diameter of the O-ring and projecting from the cylinder body and a spring working in compression between the bottom of the cylinder and the piston. the piston and its rod having grooves, and the end of the cylinder body surrounding the piston rod having a cylindrical recess coaxial with the rod and of a diameter such that it allows the compressed O-ring to pass between the part of revolution and the wall of the recess, the stroke of the piston being such that when the resort is completely compressed, the end of the piston rod is located in the recess and exceeds the bottom of this recess by a length equal to the diameter of the section of the O-ring.
Dans la position complètement rétractée du piston, l'air comprimé envoyé dans les cannelures de celui-ci a pour effet de repousser le joint O-ring tout d'abord radialement. ce qui l'oblige à s'étendre, puis ensuite axialement jusqu'à ce qu'il se détende dans la gorge de la pièce de révolution. Le moyen pour étendre le joint torique et le pousser dans sa gorge est donc uniquement constitué par l'air comprimé. Ce dernier ne risque pas d'abimer le joint torique.In the fully retracted position of the piston, the compressed air sent into the grooves of the latter has the effect of pushing the O-ring seal first radially. which forces it to extend, then axially until it relaxes in the groove of the part of revolution. The means for extending the O-ring and pushing it into its groove is therefore only constituted by compressed air. The latter does not risk damaging the O-ring.
Le procédé selon l'invention est utilisable aussi bien pour des joints toriques de grandes dimensions que pour des joints toriques de très petites dimensions.The method according to the invention can be used both for large O-rings and for very small O-rings.
Le dessin annexé représente, à titre d'exemple, une forme d'exécution, ainsi que deux variantes, d'un dispositif pour la mise en oeuvre du procédé selon 1 ' invention . La figure 1 est une vue schématique d'un dispositif pour la mise en place d'un joint torique sur un piston, la figure 1a étant une vue de face du cylindre 1.The appended drawing represents, by way of example, an embodiment and two variants of a device for implementing the method according to one invention. FIG. 1 is a schematic view of a device for placing an O-ring on a piston, FIG. 1a being a front view of the cylinder 1.
Les figures 2 à 5 sont des vues en coupe de la partie essentielle du dispositif de la figure 1 dans des positions successives d'opérations.Figures 2 to 5 are sectional views of the essential part of the device of Figure 1 in successive operating positions.
La figure 6 est une vue partielle, en coupe, d'une première variante d'exécution du dispositif selon les figures 1 à 5 pour la mise en place d'un joint torique dans une gorge située à une certaine distance de l'extrémité d'un axe.Figure 6 is a partial view, in section, of a first alternative embodiment of the device according to Figures 1 to 5 for the establishment of an O-ring in a groove located at a certain distance from the end d 'an axe.
La figure 7 est une vue partielle, en coupe, d'une seconde variante d'exécution du dispositif pour la mise en place d'un joint torique sur un piston situé à une certaine distance de l'extrémité d'un axe.Figure 7 is a partial view, in section, of a second alternative embodiment of the device for the establishment of an O-ring on a piston located at a certain distance from the end of an axis.
Le dispositif, tel que représenté au repos aux figures 1 et 2 , comprend un cylindre 1 dans lequel est monté un piston 2 muni d'une tige 3 et maintenu en butée contre une extrémité du cylindre 1 par un ressort 4 travaillant en compression entre le piston 2 et un bouchon 5 vissé à l'extrémité du cylindre 1. Ce bouchon 5 est percé d'un trou axial 6 et il est relié par un conduit 7 à une source d'air comprimé 8 munie d'un vanne adéquate. Le piston 2 et la tige 3 présentent quatre cannelures longitudinales 9. 10, 11 et 12 (figures la et 2) s'étendant sur toute la longueur du piston et de sa tige. L'extrémité du corps du cylindre 1 situé du côté de la tige 3 présente une creusure cylindrique 13. Au repos, la tige 3 dépasse cette extrémité du corps du cylindre 1. La longueur du piston 2 et de sa tige 3 sont telles que lorsque le ressort 4 est complètement comprimé (figure 3), la tige 3 dépasse le fond de la creusure 13 d'une longueur égale au diamètre de la section du -joint torique 14 qui doit être mis en place. Quant au diamètre de la creusure 13 il est déterminé d'une part par la section du joint torique 14 et d'autre part par le diamètre de la pièce de révolution 15 dans la gorge 16 de laquelle le joint torique 14 doit être mis en place. Le diamètre de la creusure 13 doit dans tous les cas être inférieur au diamètre de la pièce de révolution 15 augmenté de deux fois le diamètre de la section du joint torique 14, de telle sorte que le joint torique soit comprimé entre la pièce de révolution 15 et la paroi de la creusure 13. Le diamètre de la creusure 13 est de préférence égal au diamètre de la pièce 15 augmenté de 1.4 à 1,8 fois le diamètre de la section du joint torique.The device, as shown at rest in Figures 1 and 2, comprises a cylinder 1 in which is mounted a piston 2 provided with a rod 3 and held in abutment against one end of the cylinder 1 by a spring 4 working in compression between the piston 2 and a plug 5 screwed to the end of the cylinder 1. This plug 5 is pierced with an axial hole 6 and it is connected by a duct 7 to a source of compressed air 8 provided with a suitable valve. The piston 2 and the rod 3 have four longitudinal grooves 9. 10, 11 and 12 (Figures la and 2) extending over the entire length of the piston and its rod. The end of the body of the cylinder 1 located on the side of the rod 3 has a cylindrical recess 13. At rest, the rod 3 exceeds this end of the body of the cylinder 1. The length of the piston 2 and its rod 3 are such that when the spring 4 is completely compressed (FIG. 3), the rod 3 projects beyond the bottom of the recess 13 by a length equal to the diameter of the section of the O-ring 14 which must be placed in place. As for the diameter of the recess 13 it is determined on the one hand by the section of the O-ring 14 and on the other hand by the diameter of the part of revolution 15 in the groove 16 from which the O-ring 14 must be put in place . The diameter of the recess 13 must in all cases be less than the diameter of the part of revolution 15 increased by twice the diameter of the section of the O-ring 14, so that the O-ring is compressed between the part of revolution 15 and the wall of the recess 13. The diameter of the recess 13 is preferably equal to the diameter of the part 15 increased from 1.4 to 1.8 times the diameter of the section of the O-ring.
La mise en place du joint torique 14 dans la gorge 16 de la pièce de révolution 15 sera maintenant décrite à l'aide des figures 2 à 5.The positioning of the O-ring 14 in the groove 16 of the part of revolution 15 will now be described with the aid of FIGS. 2 to 5.
Le joint torique 14 est tout d'abord enfilé à la main sur l'extrémité de la tige 3 (figure 2). Le diamètre intérieur du joint torique 14 étant égal au diamètre de la tige 3, cette mise en place se fait très facilement. Il est évident que cette égalité des diamètres ne doit être que très approximative.The O-ring 14 is first of all threaded by hand onto the end of the rod 3 (Figure 2). The internal diameter of the O-ring 14 being equal to the diameter of the rod 3, this installation is done very easily. It is obvious that this equality of diameters should only be very approximate.
On amène ensuite coaxialement la pièce de révolution 15, au moyen d'un mécanisme automatique, contre l'extrémité de la tige 3 et avec une pression suffisante pour repousser la tige 3 et comprimer complètement le ressort 4. Dans cette position, représentée à la figure 3, l'extrémité de la tige 3 est située à l'intérieur de la creusure 13 et dépasse le fond de cette creusure d'une longueur égale ou légèrement inférieure au diamètre de la section du joint torique 14. Ce joint torique est par conséquent pris entre le fond de la creusure 13 et l'extrémité de la pièce 15.The piece of revolution 15 is then brought coaxially, by means of an automatic mechanism, against the end of the rod 3 and with sufficient pressure to push back the rod 3 and completely compress the spring 4. In this position, shown in the Figure 3, the end of the rod 3 is located inside the recess 13 and exceeds the bottom of this recess by a length equal to or slightly less than the diameter of the section of the O-ring 14. This O-ring is therefore caught between the bottom of the recess 13 and the end of part 15.
On envoie ensuite de l'air comprimé dans le cylindre 1, à travers le conduit 6 et les cannelures S à 12. A l'extrémité de la tige 3, ces cannelures sont fermées d'une part par le joint torique 14 et d'autre part par "l'extrémité de la pièce 15. Par conséquent, sous l'effet de la pression de l'air, le joint torique 14 s'étend élastiquement en augmentant le diamètre jusqu'à ce que ce diamètre atteigne le diamètre de la creusure 13 (figure 4). Dans cette position, le joint torique 14 continue de fermer le passage de l'air et il est par conséquent entraîné et comprimé entre l'épaulement 17 formé par l'extrémité de la pièce 15 et la paroi de la creusure 13. Une fois que le joint torique 14 se trouve au-dessus de la gorge 16. il se détend élastiquement dans cette gorge 16 (figure 5) et la pièce 15 peut être retirée en arrière et remplacée par une autre pièce 15. Le processus peut bien entendu se dérouler automati¬ quement, pneumatiquement par exemple.Compressed air is then sent to the cylinder 1, through the conduit 6 and the splines S to 12. At the end of the rod 3, these splines are closed on the one hand by the O-ring 14 and on the other hand by "the end of the part 15. Consequently, under the effect of the air pressure, the O-ring 14 extends elastically by increasing the diameter until this diameter reaches the diameter of the recess 13 (FIG. 4). In this position, the O-ring 14 continues to close the air passage and it is consequently entrained and compressed between the shoulder 17 formed by the end of the part 15 and the wall. of the recess 13. Once the O-ring 14 is located above the groove 16. it relaxes elastically in this groove 16 (FIG. 5) and the part 15 can be withdrawn behind and replaced by another part 15 The process can of course take place automatically, pneumatically for example.
La profondeur de la creusure 13 est fonction de la lon¬ gueur de l'épaulement 17. Cet épaυlement peut être re¬ lativement long dans le cas d'une gorge formée sur une tige ou un axe. Un exemple est représenté à la figure 6. La partie 17' séparant l'extrémité de la pièce 15 de la gorge 16 est relativement long. Par conséquent, la profondeur de la creusure 13' . correspondant à la creusure 13, est également relativement grande. Pour le reste, le dispositif représenté à la figure 6 est identique à celui représenté aux figures 2 à 5. La figure 6 représente le dispositif dans sa position comprimée, comme la figure 3. Sous l'effet de l'air comprimé. le joint torique 14 est chassé entre la partie 17" et la paroi de la creusure cylindrique 13' pour venir finalement se détendre dans la gorge 16.The depth of the recess 13 is a function of the length of the shoulder 17. This shoulder can be relatively long in the case of a groove formed on a rod or an axis. An example is shown in FIG. 6. The part 17 ′ separating the end of the part 15 from the groove 16 is relatively long. Consequently, the depth of the hollow 13 '. corresponding to the recess 13, is also relatively large. For the rest, the device shown in Figure 6 is identical to that shown in Figures 2 to 5. Figure 6 shows the device in its compressed position, as in Figure 3. Under the effect of compressed air. the O-ring 14 is driven between the part 17 "and the wall of the cylindrical recess 13 'to finally come to relax in the groove 16.
La figure 7 illustre la mise en place d'un joint tori¬ que 14 dans une gorge 18 formée entre deux portées 19 et 20 d'un axe 21. Le diamètre intérieur de la gorge est donc égal au diamètre de l'arbre 21. Dans ce cas également la gorge 18 est située à une certaine distance de l'extrémité de l'arbre 21. La chambre 13" ' , correspondant à la chambre 13" de la figure 6, est par conséquent également profonde. Cette creusure 13" ' débouche dans une seconde partie 22 dont le diamètre est égal au diamètre de la creusure 13' ' augmenté de la différence entre le diamètre de la portée 19 et le diamètre de l'arbre 21. Comme dans les exécutions précédentes, l'espace entre l'arbre 21 et la paroi de la chambre 13" ' est inférieur au diamètre de la section du joint torique 14, par exemple égal au diamètre de l'arbre 21 augmenté de 1.4 à 1,8 fois le diamètre de la section du joint torique. La figure 7 représente le dispositif dans sa position comprimée, comme la figure 3. Sous l'effet de l'air comprimé, le joint torique 14 s'étend tout d'abord au diamètre de la creusure 13' ' et il est chassé entre l'arbre 21 et la paroi de la creusure 13' " jusqu'à ce qu'il vienne buter contre la portée 19 dans la creusure 22. Il peut alors s'étendre davantage pour passer par-dessus la portée 19 et venir se détendre partiellement dans la gorge 18. FIG. 7 illustrates the positioning of a tori¬ that 14 in a groove 18 formed between two spans 19 and 20 of an axis 21. The internal diameter of the groove is therefore equal to the diameter of the shaft 21. In this case also the groove 18 is located at a certain distance from the end of the shaft 21. The chamber 13 "', corresponding to the chamber 13" of Figure 6, is therefore also deep. This recess 13 "'opens into a second part 22 whose diameter is equal to the diameter of the recess 13' 'increased by the difference between the diameter of the bearing surface 19 and the diameter of the shaft 21. As in the previous embodiments, the space between the shaft 21 and the wall of the chamber 13 "'is less than the diameter of the section of the O-ring 14, for example equal to the diameter of the shaft 21 increased from 1.4 to 1.8 times the diameter of the section of the O-ring. Figure 7 shows the device in its compressed position, like Figure 3. Under the effect of compressed air, the O-ring 14 first extends to the diameter of the recess 13 '' and it is driven between the shaft 21 and the wall of the recess 13 '"until it comes up against the bearing surface 19 in the recess 22. It can then extend further to pass over the bearing surface 19 and come to relax partially in the throat 18.

Claims

REVENDICATIONS
1. Procédé de mise en place d'un joint torique dans la gorge d'une pièce ou partie de pièce de révolution, caractérisé en ce qu'on enfile le joint torique sur une tige cylindrique auxiliaire de diamètre sensiblement égal à celui du joint torique, qu'on applique l'extré¬ mité de la pièce de révolution coaxialement contre l'extrémité de ladite tige et qu'on fait passer le joint torique de la tige sur la pièce de révolution au moyen d'air comprimé.1. Method for placing an O-ring in the groove of a part or part of a part of revolution, characterized in that the O-ring is threaded on an auxiliary cylindrical rod with a diameter substantially equal to that of the O-ring , that the extremity of the part of revolution is applied coaxially against the end of said rod and that the O-ring of the rod is passed over the part of revolution by means of compressed air.
2. Dispositif pour la mis en oeuvre du procédé selon la revendication 1, caractérisé par le fait qu'il comprend une source d'air comprimé (8), un cylindre (1) relié à cette source d'air comprimé et contenant un piston (2) solidaire d'une tige (3) de diamètre au moins approxi¬ mativement égal au diamètre intérieur du joint torique (14) et faisant saillie du corps du cylindre et un res¬ sort (4) travaillant en compression entre le fond du cylindre et le piston, le piston et sa tige présentant des cannelures (9 à 12), et l'extrémité du corps du cylindre entourant la tige du piston présentant une creusure cylindrique (13) coaxiale à la tige et de diamètre tel qu'il permet au joint torique comprimé de passer entre la pièce de révolution et la paroi de la creusure. la course du piston étant telle que lorsque le resort (4) est complètement comprimé, l'extrémité de la tige du piston est située dans la creusure et dépasse le fond de cette creusure d'une longueur égale au diamètre de la section du joint torique.2. Device for implementing the method according to claim 1, characterized in that it comprises a source of compressed air (8), a cylinder (1) connected to this source of compressed air and containing a piston (2) integral with a rod (3) of diameter at least approxi¬ matively equal to the internal diameter of the O-ring (14) and projecting from the body of the cylinder and a res¬ (4) working in compression between the bottom of the cylinder and the piston, the piston and its rod having grooves (9 to 12), and the end of the body of the cylinder surrounding the piston rod having a cylindrical recess (13) coaxial with the rod and of diameter such that allows the compressed O-ring to pass between the part of revolution and the wall of the hollow. the stroke of the piston being such that when the resort (4) is completely compressed, the end of the piston rod is located in the recess and exceeds the bottom of this recess by a length equal to the diameter of the section of the O-ring .
3. Dispositif selon la revendication 2, caractérisé par le fait que le diamètre de la creusure est égal au diamètre de la pièce de révolution augmenté de 1.4 à 1,8 fois le diamètre de la section du joint torique. 3. Device according to claim 2, characterized in that the diameter of the recess is equal to the diameter of the part of revolution increased from 1.4 to 1.8 times the diameter of the section of the O-ring.
EP19910919346 1990-10-22 1991-10-22 Method and device for mounting an o-ring seal in a groove Withdrawn EP0506932A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3357/90 1990-10-22
CH335790A CH684391A5 (en) 1990-10-22 1990-10-22 Method and apparatus for implementing an O-ring in a groove.

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Publication Number Publication Date
EP0506932A1 true EP0506932A1 (en) 1992-10-07

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EP19910919346 Withdrawn EP0506932A1 (en) 1990-10-22 1991-10-22 Method and device for mounting an o-ring seal in a groove

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EP (1) EP0506932A1 (en)
JP (1) JPH05504514A (en)
CH (1) CH684391A5 (en)
WO (1) WO1992006816A1 (en)

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Publication number Priority date Publication date Assignee Title
CN100525997C (en) * 2006-12-20 2009-08-12 中国科学院沈阳自动化研究所 Special press-fitting mechanism for elastic check ring for shaft
CN102950572B (en) * 2011-08-26 2015-02-11 浙江派尼尔机电有限公司 Positioning assembly device
CN104139368B (en) * 2013-09-26 2015-12-23 国家电网公司 Ring elastic parts mounting tool and device for spreading thereof
CN104070499A (en) * 2014-06-18 2014-10-01 安徽中鼎金亚汽车管件制造有限公司 Formed pipe joint O-ring assembling fixture
CN108145410B (en) * 2017-12-28 2019-09-27 潍柴动力股份有限公司 A kind of sealing coil installing device and installation method
CN111670089B (en) 2018-02-13 2022-02-18 Abb瑞士股份有限公司 Apparatus and method for separating, feeding and installing O-rings

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Publication number Priority date Publication date Assignee Title
US3581379A (en) * 1967-12-05 1971-06-01 Martin E Drobilits Pneumatic o-ring applicator and method
JPS5434186A (en) * 1977-08-20 1979-03-13 Tokico Ltd Device for automatically engaging flexible ring part
AT389483B (en) * 1983-04-21 1989-12-11 Sticht Fertigungstech Stiwa METHOD AND DEVICE FOR INSERTING ELASTIC RINGS IN RING-SHAPED GROOVES

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Title
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Also Published As

Publication number Publication date
JPH05504514A (en) 1993-07-15
WO1992006816A1 (en) 1992-04-30
CH684391A5 (en) 1994-09-15

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