EP3987075A1 - Device for depositing a coating for manufacturing a valve seat - Google Patents

Device for depositing a coating for manufacturing a valve seat

Info

Publication number
EP3987075A1
EP3987075A1 EP20733277.6A EP20733277A EP3987075A1 EP 3987075 A1 EP3987075 A1 EP 3987075A1 EP 20733277 A EP20733277 A EP 20733277A EP 3987075 A1 EP3987075 A1 EP 3987075A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
coating
cylinder head
opening
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20733277.6A
Other languages
German (de)
French (fr)
Inventor
Laurent Aubanel
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP3987075A1 publication Critical patent/EP3987075A1/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
    • C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/087—Coating with metal alloys or metal elements only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0421—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with rotating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/162—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
    • B05B7/1626—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing

Definitions

  • the invention relates to a device for depositing a coating for
  • a cylinder head of a vehicle engine generally comprises a plurality of housings each intended to receive a valve.
  • a coating on the wall delimiting each of these housings.
  • These housings have a circular opening and the wall delimiting each of these openings is frustoconical in shape.
  • the coating must therefore be deposited on a closed frustoconical strip, namely over 360 °. It is important to note that the coating is deposited gradually from one opening to another, and not simultaneously around all the openings of the cylinder head. This is because a valve seat will first be created around an opening, then gradually around the other openings in the cylinder head.
  • a device according to the invention makes it possible to deposit a coating around the openings of a cylinder head to manufacture valve seats, while overcoming the drawbacks noted in the processes of the state of the technical.
  • the invention relates to a device for depositing a coating on a closed wall of a cylinder head defining an opening intended to receive a valve in order to manufacture a valve seat, said device having an elongated outlet nozzle and capable of diffusing a material constituting the coating by means of at least one hot gas at very high speed.
  • the device comprises a means for rotating the nozzle allowing said nozzle to perform at least once a 360 ° rotary movement in order to deposit the coating on the whole of said wall.
  • the nozzle is part of the device through which the coating is distributed to form the seat of a valve on the cylinder head of an engine.
  • the principle of a device according to the invention is to include a means for rotating the nozzle in order to allow the latter to pivot at least 360 °. In this way, assuming that the cylinder head remains in a fixed position, the nozzle can deposit the coating over the entire wall defining the opening, in order to form a valve seat around an opening in said cylinder head.
  • the rotating means is motorized in order to properly control the rotary movement of the nozzle.
  • This rotating means can either be directly associated with the nozzle and cause the rotation of only said nozzle, or be associated with the device and cause the rotation of the nozzle by means of a setting. rotation of the device to which said nozzle is secured.
  • the device comprises metallic particles and receives a pressurized gas which makes it possible to accelerate said particles at the outlet of the nozzle thanks to the particular shape of said nozzle.
  • the nozzle is fixed within the device. The nozzle can perform several successive rotations of 360 °, in order to create the valve seat, after several passes.
  • the device comprises a hollow body provided with a heating element capable of heating said at least one gas and to which the nozzle is secured, the rotating element being capable of rotating said body.
  • the setting in rotation of the body generates a simultaneous setting in rotation of the nozzle which is fixed to said body.
  • the body is cylindrical and the nozzle is inclined relative to the axis of revolution of said body, the rotating element causing the body to rotate about said axis. Thanks to this configuration, the rotation of the device is well controlled since it takes place around the axis of revolution of said body.
  • Specifying that the nozzle is inclined relative to the axis of revolution of the body means that the longitudinal axis of the nozzle and said axis of revolution are not parallel. In this way, the nozzle can for example make an angle of 10 °, 45 ° or 90 ° with the axis of revolution of the body.
  • a longitudinal axis of the nozzle is inclined by 45 ° relative to the axis of revolution of the body.
  • Such a configuration of the device is particularly suitable for depositing a substance on a frustoconical wall of the cylinder head defining a circular opening.
  • the gas is high pressure nitrogen. This is an illustrative example particularly suitable for a device according to the invention, and not a limiting example.
  • the nozzle is a Laval nozzle.
  • a Laval nozzle makes it possible to accelerate the pressurized gas passing through it, and therefore the particles constituting the coating to be deposited.
  • the material constituting the coating is powdery and comprises steel particles, nickel alloy particles and copper particles.
  • the apparatus comprises a deposition device according to the invention, and a cylinder head support member whose position is fixed when the nozzle is rotated to deposit the coating. It is therefore sufficient to fix the position of the support element carrying the cylinder head, in order to allow a device according to the invention to target a particular opening of said cylinder head, then to rotate the nozzle in order to deposit the coating around it. targeted opening.
  • the position of the support member carrying the cylinder head is changed to allow the device to target another opening, and so on.
  • the cylinder head support element remains fixed, while the nozzle of the deposition device is rotated to deposit the coating all around the selected opening.
  • the distance separating the deposition device and the support element is adjustable so as to adjust the distance separating one end of the nozzle through which the constituent material is diffused of the coating and the wall of the cylinder head intended to receive said coating.
  • the apparatus according to the invention is flexible in use, because it can adapt to a particular geometry of the cylinder head and / or valve thanks to an adjustable distance between an opening of the valve and an outlet end of the valve. nozzle.
  • Another object of the invention is a method for depositing a coating on a wall of a cylinder head defining an opening intended to receive a valve for manufacturing a valve seat from an apparatus according to the invention. .
  • the method comprises the following steps,
  • the coating is completely deposited after several 360 ° rotations of the nozzle.
  • a deposition device has the advantage of operating with control and precision, while remaining simple in design. It also has the advantage of being a constant footprint compared to existing devices, while being more efficient than them.
  • FIG. 1 is a schematic side view of a deposition device according to
  • FIG. 2 is a schematic and enlarged side view of an area of Figure 1 grouping one end of the outlet nozzle of a device according to the invention, and of a cylinder head placed on a support member.
  • a device 1 for depositing a coating on a cylinder head 2 of a vehicle engine for the purpose of manufacturing a valve seat 3, schematically comprises a supply assembly 4, a body 5 and a nozzle 6 comprising a nozzle 7.
  • the supply assembly 4 comprises an inlet pipe 8 for a mixture of powders, an inlet pipe 9 for high pressure nitrogen, at least one pipe 10 for the arrival of a cooling liquid and a rotating joint 11, said assembly 4 being placed upstream of the body 5.
  • the powder mixture is preferably composed of a steel powder, a powder of a hard nickel alloy and a powder of copper. These three powders constitute the material which will be deposited on the cylinder head 2 in the form of a coating to obtain a valve seat by means of a device 1 according to the invention.
  • the body 5 of the device 1 is hollow and is preferably shaped
  • This body 5 is mounted to rotate about its axis of revolution 12, by means of a motorized rotary means ensuring the rotation of said body 5 and in particular controlling its amplitude of rotation.
  • the inlet pipe 8 for the powder mixture passes through the body 5 and part of the nozzle 6 until it emerges upstream from the nozzle 7 in an orifice thereof.
  • the powder leaving the inlet duct 8 can therefore only pass through the nozzle 7.
  • the high pressure nitrogen which has been previously heated in the body 5, will help to circulate the powder in the nozzle 7, the geometry of which is particular will accelerate said powder exiting said nozzle 7 at a very high speed.
  • the end piece 6 is a hollow part having a first rectilinear segment 15, extended by a second rectilinear segment 16 which is inclined relative to said first segment 15.
  • the cross section of the first segment 15 is at least twice as high as the cross section of the second segment 16 and corresponds to the cross section of the body 5.
  • the second segment 16 ends with a cylindrical and enlarged flange 17, which is inclined relative to a longitudinal axis of said second segment 16.
  • the nozzle 7, which is an elongated cylindrical part originates at the level of this collar 17 so that the axis of revolution of said collar 17 and the axis of revolution of said nozzle 7 are perfectly coincident.
  • the first segment 15 and the second segment 16 are cylindrical in shape.
  • the nozzle 7 is a Laval nozzle, having an internal channel of which an upstream part 18 is convergent and of which a downstream part 19 extending said upstream part 18 is divergent.
  • the upstream part 18 forms the orifice of the nozzle 7 into which the powder inlet channel 8 emerges.
  • the upstream part 18 and the downstream part 19 extend in the same direction, the downstream part 19 being more elongated than the upstream part 18.
  • the tip 6 is fixed to the body 5, so that the first segment 15 of said tip 6 extends said body 5.
  • the body 5 is extended by the first segment 15, which is itself extended by the second segment 16, said second segment 16 ending in the nozzle 7.
  • the second segment 16 extends parallel to the axis of revolution 12 of the body 5, being offset from said axis 12, the first segment 15 and the nozzle 7 being inclined with respect to said second segment 16.
  • the end piece 6 is a part U-shaped.
  • a longitudinal axis of the nozzle 7 preferably forms an angle of 45 ° with the axis of revolution 12 of the body 5.
  • the intermediary of the motorized rotary means causes a simultaneous rotation of the nozzle 6 which is secured to said body 5, and therefore a simultaneous rotation of the nozzle 7 which is an integral part of said nozzle 6.
  • the cylinder head 2 is supported by a support member 20 which is separate from the deposit device 1. In this way, the rotation of the deposition device 1 has no influence on the positioning of the support element 20 and vice versa.
  • the support member 20 has an adjustable position, allowing the position of the cylinder head 2 to be adjusted relative to the deposition device 1.
  • the cylinder head 2 schematically has several circular openings 14, each intended to receive a valve. Each opening 14 is associated with a valve guide 25 and is delimited by a frustoconical wall 21, intended to receive the coating diffused by the deposition device 1, in order to manufacture a valve seat 3. Thanks to the adjustable position of the support element 20, it is possible to adjust the distance separating the end 23 of the nozzle 7 through which the coating will exit and the frustoconical wall 21 delimiting an opening 14 of the cylinder head 2 and intended to receive the coating.
  • the invention comprises the following steps:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating Apparatus (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention relates to a device (1) for depositing a coating on a closed wall (21) of a cylinder head (2) defining an opening (14) intended for receiving a valve in order to manufacture a valve seat (3), said device having an elongate outlet nozzle (7) and being capable of diffusing a material constituting the coating by means of at least one hot gas at very high speed. According to the invention, the device comprises a means for rotating the nozzle (7) allowing said nozzle (7) to perform a 360° rotary movement at least once in order to deposit the coating on the whole of said wall (11).

Description

Description Description
Titre de l'invention : DISPOSITIF DE DEPOT D’UN REVETEMENT Title of the invention: DEVICE FOR FILING A COATING
POUR LA FABRICATION D’UN SIEGE DE SOUPAPE FOR THE MANUFACTURE OF A VALVE SEAT
[0001 ] L’invention se rapporte à un dispositif de dépôt d’un revêtement pour la [0001] The invention relates to a device for depositing a coating for
fabrication d’un siège de soupape. manufacture of a valve seat.
[0002] Une culasse d’un moteur de véhicule, comprend généralement une pluralité de logements destinés à recevoir chacun une soupape. Afin de fabriquer des sièges de soupape, il est prévu de déposer au moyen d’un dispositif possédant une buse, un revêtement sur la paroi délimitant chacun de ces logements. Ces logements présentent une ouverture circulaire et la paroi délimitant chacune de ces ouvertures est de forme tronconique. Le revêtement doit donc être déposé sur une bande tronconique fermée, à savoir sur 360°. Il est important de signaler, que le dépôt du revêtement s’effectue progressivement d’une ouverture à l’autre, et non pas simultanément autour de toutes les ouvertures de la culasse. En effet, un siège de soupape va d’abord être crée autour d’une ouverture, puis de proche en proche autour des autres ouvertures de la culasse. [0002] A cylinder head of a vehicle engine generally comprises a plurality of housings each intended to receive a valve. In order to manufacture valve seats, it is planned to deposit, by means of a device having a nozzle, a coating on the wall delimiting each of these housings. These housings have a circular opening and the wall delimiting each of these openings is frustoconical in shape. The coating must therefore be deposited on a closed frustoconical strip, namely over 360 °. It is important to note that the coating is deposited gradually from one opening to another, and not simultaneously around all the openings of the cylinder head. This is because a valve seat will first be created around an opening, then gradually around the other openings in the cylinder head.
[0003] Actuellement, certains procédés mis en oeuvre pour la réalisation du dépôt d’un tel revêtement, privilégient une position fixe de la buse et une mise en rotation sur 360°d’une pièce support de la culasse , afin de balayer la totalité de la paroi délimitant une ouverture. Currently, certain methods implemented for the production of the deposition of such a coating, favor a fixed position of the nozzle and a 360 ° rotation of a support part of the cylinder head, in order to sweep the entire of the wall delimiting an opening.
[0004] D’autres procédés s’appuient sur une pièce support fixe de la culasse, et sur l’activation de robots aptes à manipuler le dispositif de dépôt du revêtement, afin qu’il puisse couvrir la totalité de la paroi délimitant une ouverture. [0004] Other methods are based on a fixed support part of the cylinder head, and on the activation of robots capable of handling the coating deposition device, so that it can cover the entire wall delimiting an opening .
[0005] Or, ces procédés sont complexes à mettre en oeuvre, sont peu précis, sont lents et manquent de souplesse pour notamment pouvoir facilement et rapidement s’adapter à différentes géométries de soupape et/ou de culasse. However, these methods are complex to implement, are imprecise, are slow and lack flexibility in particular to be able to easily and quickly adapt to different geometries of the valve and / or cylinder head.
[0006] Un dispositif selon l’invention, permet de réaliser le dépôt d’un revêtement autour des ouvertures d’une culasse pour fabriquer des sièges de soupapes, tout en s’affranchissant des inconvénients relevés dans les procédés de l’état de la technique. [0007] L’invention a pour objet un dispositif de dépôt d’un revêtement sur une paroi fermée d’une culasse délimitant une ouverture destinée à recevoir une soupape afin de fabriquer un siège de soupape, ledit dispositif possédant une buse de sortie allongée et apte à diffuser un matériau constitutif du revêtement au moyen d’au moins un gaz chaud à très haute vitesse. A device according to the invention makes it possible to deposit a coating around the openings of a cylinder head to manufacture valve seats, while overcoming the drawbacks noted in the processes of the state of the technical. The invention relates to a device for depositing a coating on a closed wall of a cylinder head defining an opening intended to receive a valve in order to manufacture a valve seat, said device having an elongated outlet nozzle and capable of diffusing a material constituting the coating by means of at least one hot gas at very high speed.
[0008] Selon l’invention, le dispositif comprend un moyen de mise en rotation de la buse permettant à ladite buse d’effectuer au moins une fois un déplacement rotatif sur 360°afin de déposer le revêtement sur la totalité de ladite paroi. La buse est l’élément du dispositif par lequel est diffusé le revêtement destiné à constituer le siège d’une soupape sur la culasse d’un moteur. Le principe d’un dispositif selon l’invention est de comporter un moyen de mise en rotation de la buse afin de permettre à celle-ci de pivoter sur au moins 360°. De cette manière, en supposant que la culasse demeure dans une position fixe, la buse peut déposer le revêtement sur la totalité de la paroi délimitant l’ouverture, afin d’élaborer un siège de soupape autour d’une ouverture de ladite culasse. Il est supposé que la culasse possède une pluralité d’ouvertures et que le dépôt du revêtement s’effectue d’abord autour d’une ouverture, puis lorsque le siège de la soupape a été créé autour de ladite ouverture, la culasse est déplacée pour recommencer l’opération de dépôt autour d’une autre ouverture, et ainsi de suite. Avantageusement, le moyen de mise en rotation est motorisé afin de bien contrôler le mouvement rotatif de la buse. Ce moyen de mise en rotation peut, soit être directement associé à la buse et entraîner la mise en rotation de la seule dite buse, soit être associé au dispositif et provoquer la mise en rotation de la buse par l’intermédiaire d’une mise en rotation du dispositif auquel est solidarisée ladite buse. Préférentiellement, le dispositif comprend des particules métalliques et reçoit un gaz sous pression qui permet d’accélérer lesdites particules en sortie de buse grâce à la forme particulière de ladite buse. De façon préférentielle, la buse est fixe au sein du dispositif. La buse peut effectuer plusieurs rotations successives de 360°, afin de créer le siège de soup ape, après plusieurs passages. [0008] According to the invention, the device comprises a means for rotating the nozzle allowing said nozzle to perform at least once a 360 ° rotary movement in order to deposit the coating on the whole of said wall. The nozzle is part of the device through which the coating is distributed to form the seat of a valve on the cylinder head of an engine. The principle of a device according to the invention is to include a means for rotating the nozzle in order to allow the latter to pivot at least 360 °. In this way, assuming that the cylinder head remains in a fixed position, the nozzle can deposit the coating over the entire wall defining the opening, in order to form a valve seat around an opening in said cylinder head. It is assumed that the cylinder head has a plurality of openings and that the deposition of the coating takes place first around an opening, then when the valve seat has been created around said opening, the cylinder head is moved to restart the deposit operation around another opening, and so on. Advantageously, the rotating means is motorized in order to properly control the rotary movement of the nozzle. This rotating means can either be directly associated with the nozzle and cause the rotation of only said nozzle, or be associated with the device and cause the rotation of the nozzle by means of a setting. rotation of the device to which said nozzle is secured. Preferably, the device comprises metallic particles and receives a pressurized gas which makes it possible to accelerate said particles at the outlet of the nozzle thanks to the particular shape of said nozzle. Preferably, the nozzle is fixed within the device. The nozzle can perform several successive rotations of 360 °, in order to create the valve seat, after several passes.
[0009] Selon une caractéristique possible de l’invention, le dispositif comprend un corps creux doté d’un élément de chauffage apte à chauffer ledit au moins un gaz et auquel est solidarisée la buse, l’élément de mise en rotation étant apte à mettre en rotation ledit corps. De cette manière, la mise en rotation du corps engendre une mise en rotation simultanée de la buse qui est fixée audit corps. [0009] According to one possible characteristic of the invention, the device comprises a hollow body provided with a heating element capable of heating said at least one gas and to which the nozzle is secured, the rotating element being capable of rotating said body. In this way, the setting in rotation of the body generates a simultaneous setting in rotation of the nozzle which is fixed to said body.
[0010] Selon une caractéristique possible de l’invention, le corps est cylindrique et la buse est inclinée par rapport à l’axe de révolution dudit corps, l’élément de mise en rotation provoquant une rotation du corps autour dudit axe. Grâce à cette configuration, la rotation du dispositif est bien maîtrisée puisqu’elle s’effectue autour de l’axe de révolution dudit corps. Le fait de préciser que la buse est inclinée par rapport à l’axe de révolution du corps signifie que l’axe longitudinal de la buse et ledit axe de révolution ne sont pas parallèles. De cette manière, la buse peut par exemple faire un angle de 10°, de 45° ou de 90° avec l’axe de révolution du corps. [0010] According to a possible characteristic of the invention, the body is cylindrical and the nozzle is inclined relative to the axis of revolution of said body, the rotating element causing the body to rotate about said axis. Thanks to this configuration, the rotation of the device is well controlled since it takes place around the axis of revolution of said body. Specifying that the nozzle is inclined relative to the axis of revolution of the body means that the longitudinal axis of the nozzle and said axis of revolution are not parallel. In this way, the nozzle can for example make an angle of 10 °, 45 ° or 90 ° with the axis of revolution of the body.
[001 1 ] Selon une caractéristique possible de l’invention, un axe longitudinal de la buse est incliné de 45°par rapport à l’axe de révo lution du corps. Une telle configuration du dispositif est particulièrement adaptée au dépôt d’une substance sur une paroi tronconique de la culasse délimitant une ouverture circulaire. [001 1] According to a possible characteristic of the invention, a longitudinal axis of the nozzle is inclined by 45 ° relative to the axis of revolution of the body. Such a configuration of the device is particularly suitable for depositing a substance on a frustoconical wall of the cylinder head defining a circular opening.
[0012] Selon une caractéristique possible de l’invention, le gaz est de l’azote haute pression. Il s’agit d’un exemple illustratif particulièrement adapté à un dispositif selon l’invention, et non pas d’un exemple limitatif. [0012] According to a possible characteristic of the invention, the gas is high pressure nitrogen. This is an illustrative example particularly suitable for a device according to the invention, and not a limiting example.
[0013] Selon une caractéristique possible de l’invention, la buse est une tuyère de Laval. Une telle buse permet d’accélérer le gaz sous pression la traversant, et donc des particules constituant le revêtement à déposer. [0013] According to a possible characteristic of the invention, the nozzle is a Laval nozzle. Such a nozzle makes it possible to accelerate the pressurized gas passing through it, and therefore the particles constituting the coating to be deposited.
[0014] Selon une caractéristique possible de l’invention, le matériau constitutif du revêtement est pulvérulent et comprend des particules d’acier, des particules d’alliage de Nickel et des particules de cuivre. Il s’agit d’un exemple illustratif et non pas limitatif, de particules constituant le matériau à déposer au moyen d’un dispositif selon l’invention. Un mélange de telles particules permet de fabriquer des sièges de soupape robustes et constants dans le temps, tout en répondant aux spécificités de fonctionnement d’une soupape. [0014] According to a possible characteristic of the invention, the material constituting the coating is powdery and comprises steel particles, nickel alloy particles and copper particles. This is an illustrative and not limiting example of particles constituting the material to be deposited by means of a device according to the invention. A mixture of such particles makes it possible to manufacture valve seats that are robust and constant over time, while meeting the specific operating characteristics of a valve.
[0015] L’invention a pour autre objet un appareillage apte à déposer un revêtement sur une paroi fermée d’une culasse délimitant une ouverture destinée à recevoir une soupape afin de fabriquer un siège de soupape. [0016] Selon l’invention, l’appareillage comprend un dispositif de dépôt conforme à l’invention, et un élément de support de la culasse dont la position est figée lorsque la buse est mise en rotation pour déposer le revêtement. Il suffit donc de figer la position de l’élément de support portant la culasse, afin de permettre à un dispositif selon l’invention de cibler une ouverture particulière de ladite culasse, puis de mettre en rotation la buse afin de déposer le revêtement autour de l’ouverture ciblée. Une fois que le siège a été édifié, la position de l’élément de support portant la culasse est modifiée afin de permettre au dispositif de cibler une autre ouverture, et ainsi de suite. Dans un appareillage selon l’invention, l’élément de support de la culasse reste fixe, tandis que la buse du dispositif de dépôt est mise en rotation pour déposer le revêtement tout autour de l’ouverture sélectionnée. Another object of the invention is an apparatus capable of depositing a coating on a closed wall of a cylinder head defining an opening intended to receive a valve in order to manufacture a valve seat. According to the invention, the apparatus comprises a deposition device according to the invention, and a cylinder head support member whose position is fixed when the nozzle is rotated to deposit the coating. It is therefore sufficient to fix the position of the support element carrying the cylinder head, in order to allow a device according to the invention to target a particular opening of said cylinder head, then to rotate the nozzle in order to deposit the coating around it. targeted opening. Once the seat has been erected, the position of the support member carrying the cylinder head is changed to allow the device to target another opening, and so on. In an apparatus according to the invention, the cylinder head support element remains fixed, while the nozzle of the deposition device is rotated to deposit the coating all around the selected opening.
[0017] Selon une caractéristique possible d’un appareillage selon l’invention, la distance séparant le dispositif de dépôt et l’élément de support est ajustable de manière à régler la distance séparant une extrémité de la buse par laquelle est diffusée le matériau constitutif du revêtement et la paroi de la culasse destinée à recevoir ledit revêtement. Ainsi, l’appareillage selon l’invention est souple d’utilisation, car il peut s’adapter à une géométrie particulière de culasse et/ou de soupape grâce à une distance ajustable entre une ouverture de la soupape et une extrémité de sortie de la buse. According to a possible characteristic of an apparatus according to the invention, the distance separating the deposition device and the support element is adjustable so as to adjust the distance separating one end of the nozzle through which the constituent material is diffused of the coating and the wall of the cylinder head intended to receive said coating. Thus, the apparatus according to the invention is flexible in use, because it can adapt to a particular geometry of the cylinder head and / or valve thanks to an adjustable distance between an opening of the valve and an outlet end of the valve. nozzle.
[0018] L’invention a pour autre objet un procédé de dépôt d’un revêtement sur une paroi d’une culasse délimitant une ouverture destinée à recevoir une soupape pour fabriquer un siège de soupape à partir d’un appareillage conforme à l’invention. Another object of the invention is a method for depositing a coating on a wall of a cylinder head defining an opening intended to receive a valve for manufacturing a valve seat from an apparatus according to the invention. .
[0019] Selon l’invention, le procédé comprend les étapes suivantes, [0019] According to the invention, the method comprises the following steps,
-Une étape de réglage de la distance entre le dispositif de dépôt et l’élément de support de la culasse, afin de régler la distance séparant la buse et la paroi de la culasse délimitant l’ouverture, -A step of adjusting the distance between the depositing device and the cylinder head support member, in order to adjust the distance between the nozzle and the cylinder head wall delimiting the opening,
-Une étape de mise en rotation de la buse au moyen d’une mise en rotation du corps autour de son axe de révolution par l’intermédiaire d’un actionnement de l’élément de mise en rotation, [0020] Une étape de dépôt du revêtement sur la totalité de la paroi de la culasse délimitant l’ouverture, pour créer le siège de la soupape. -A step of rotating the nozzle by rotating the body around its axis of revolution by actuating the rotating element, A step of depositing the coating over the entire wall of the cylinder head delimiting the opening, to create the seat of the valve.
[0021 ] Il peut être considéré que le revêtement est complètement déposé après plusieurs rotations de 360°de la buse. It can be considered that the coating is completely deposited after several 360 ° rotations of the nozzle.
[0022] Un dispositif de dépôt selon l’invention présente l’avantage de fonctionner avec maîtrise et précision, tout en demeurant de conception simple. Il a de plus l’avantage d’être d’un encombrement constant par rapport aux dispositifs existants, tout en étant plus performants que ceux-ci. [0022] A deposition device according to the invention has the advantage of operating with control and precision, while remaining simple in design. It also has the advantage of being a constant footprint compared to existing devices, while being more efficient than them.
[0023] On donne ci-après, une description détaillée d’un mode de réalisation préféré d’un dispositif de dépôt selon l’invention, en se référant aux figures suivantes : The following is a detailed description of a preferred embodiment of a deposition device according to the invention, with reference to the following figures:
[0024] [Fig. 1 ] est une vue schématique de côté d’un dispositif de dépôt selon [0024] [Fig. 1] is a schematic side view of a deposition device according to
l’invention et d’un élément de support soutenant une culasse, the invention and a support element supporting a cylinder head,
[0025] [Fig. 2] est une vue de côté schématique et agrandie d’une zone de la figure 1 regroupant une extrémité de la buse de sortie d’un dispositif selon l’invention, et d’une culasse placée sur un élément de support. [0025] [Fig. 2] is a schematic and enlarged side view of an area of Figure 1 grouping one end of the outlet nozzle of a device according to the invention, and of a cylinder head placed on a support member.
[0026] En se référant à la figure 1 , un dispositif 1 de dépôt d’un revêtement sur une culasse 2 d’un moteur de véhicule dans le but de fabriquer un siège 3 de soupape, comprend schématiquement un ensemble d’alimentation 4, un corps 5 et un embout 6 comprenant une buse 7. Referring to Figure 1, a device 1 for depositing a coating on a cylinder head 2 of a vehicle engine for the purpose of manufacturing a valve seat 3, schematically comprises a supply assembly 4, a body 5 and a nozzle 6 comprising a nozzle 7.
[0027] L’ensemble d’alimentation 4 comporte un conduit d’arrivée 8 d’un mélange de poudres, un conduit d’arrivée 9 d’azote haute pression, au moins un conduit 10 d’arrivée d’un liquide de refroidissement et un joint tournant 1 1 , ledit ensemble 4 étant placé en amont du corps 5. Le mélange de poudre est préférentiellement composé d’une poudre d’acier, d’une poudre d’un alliage de nickel dur et d’une poudre de cuivre. Ces trois poudres constituent le matériau qui sera déposé sur la culasse 2 sous forme d’un revêtement pour obtenir un siège de soupape au moyen d’un dispositif 1 selon l’invention. The supply assembly 4 comprises an inlet pipe 8 for a mixture of powders, an inlet pipe 9 for high pressure nitrogen, at least one pipe 10 for the arrival of a cooling liquid and a rotating joint 11, said assembly 4 being placed upstream of the body 5. The powder mixture is preferably composed of a steel powder, a powder of a hard nickel alloy and a powder of copper. These three powders constitute the material which will be deposited on the cylinder head 2 in the form of a coating to obtain a valve seat by means of a device 1 according to the invention.
[0028] Le corps 5 du dispositif 1 est creux et est préférentiellement de forme The body 5 of the device 1 is hollow and is preferably shaped
cylindrique. Il possède donc un axe de révolution 12 et renferme un système de chauffage 13 de l’azote alimenté par une arrivée électrique 40 inclus dans l’ensemble d’alimentation 4. Ce corps 5 est monté rotatif autour de son axe de révolution 12, par l’intermédiaire d’un moyen rotatif motorisé assurant la mise en rotation dudit corps 5 et contrôlant notamment son amplitude de rotation. cylindrical. It therefore has an axis of revolution 12 and contains a heating system 13 for the nitrogen supplied by an electrical supply 40 included in the supply assembly 4. This body 5 is mounted to rotate about its axis of revolution 12, by means of a motorized rotary means ensuring the rotation of said body 5 and in particular controlling its amplitude of rotation.
[0029] Le conduit d’arrivée 8 du mélange de poudre traverse le corps 5 et une partie de l’embout 6 jusqu’à déboucher en amont de la buse 7 dans un orifice de celle- ci. La poudre sortant du conduit d’arrivée 8 ne peut donc que transiter par la buse 7. L’azote haute pression, qui a été préalablement chauffé dans le corps 5, va contribuer à faire circuler la poudre dans la buse 7, dont la géométrie particulière va accélérer ladite poudre sortant de ladite buse 7 à une vitesse très élevée. The inlet pipe 8 for the powder mixture passes through the body 5 and part of the nozzle 6 until it emerges upstream from the nozzle 7 in an orifice thereof. The powder leaving the inlet duct 8 can therefore only pass through the nozzle 7. The high pressure nitrogen, which has been previously heated in the body 5, will help to circulate the powder in the nozzle 7, the geometry of which is particular will accelerate said powder exiting said nozzle 7 at a very high speed.
[0030] L’embout 6 est une pièce creuse présentant un premier segment rectiligne 15, prolongé par un deuxième segment rectiligne 16 qui est incliné par rapport audit premier segment 15. La section transversale du premier segment 15 est au moins deux fois plus élevée que la section transversale du deuxième segment 16 et correspond à la section transversale du corps 5. Le deuxième segment 16 se termine par une collerette 17 cylindrique et élargie, qui est inclinée par rapport à un axe longitudinal dudit deuxième segment 16. La buse 7, qui est une pièce cylindrique allongée prend naissance au niveau de cette collerette 17 de sorte que l’axe de révolution de ladite collerette 17 et l’axe de révolution de ladite buse 7 soient parfaitement confondus. Préférentiellement, le premier segment 15 et le deuxième segment 16 sont de forme cylindrique. The end piece 6 is a hollow part having a first rectilinear segment 15, extended by a second rectilinear segment 16 which is inclined relative to said first segment 15. The cross section of the first segment 15 is at least twice as high as the cross section of the second segment 16 and corresponds to the cross section of the body 5. The second segment 16 ends with a cylindrical and enlarged flange 17, which is inclined relative to a longitudinal axis of said second segment 16. The nozzle 7, which is an elongated cylindrical part originates at the level of this collar 17 so that the axis of revolution of said collar 17 and the axis of revolution of said nozzle 7 are perfectly coincident. Preferably, the first segment 15 and the second segment 16 are cylindrical in shape.
[0031 ] Avantageusement la buse 7 est une tuyère de Laval, présentant un canal interne dont une partie amont 18 est convergente et dont une partie aval 19 prolongeant ladite partie amont 18 est divergente. La partie amont 18 matérialise l’orifice de la buse 7 dans lequel débouche le canal d’arrivée 8 de poudre. La partie amont 18 et la partie aval 19 s’étendent dans la même direction, la partie aval 19 étant plus allongée que la partie amont 18. Advantageously, the nozzle 7 is a Laval nozzle, having an internal channel of which an upstream part 18 is convergent and of which a downstream part 19 extending said upstream part 18 is divergent. The upstream part 18 forms the orifice of the nozzle 7 into which the powder inlet channel 8 emerges. The upstream part 18 and the downstream part 19 extend in the same direction, the downstream part 19 being more elongated than the upstream part 18.
[0032] L’embout 6 est fixé au corps 5, de sorte que le premier segment 15 dudit embout 6 prolonge ledit corps 5. Autrement dit, le corps 5 est prolongé par le premier segment 15, qui est lui-même prolongé par le deuxième segment 16, ledit deuxième segment 16 se terminant par la buse 7. Le deuxième segment 16 s’étend parallèlement à l’axe de révolution 12 du corps 5, en étant décalé par rapport audit axe 12, le premier segment 15 et la buse 7 étant inclinés par rapport audit deuxième segment 16. Schématiquement, l’embout 6 est une pièce en forme de U. Un axe longitudinal de la buse 7 fait préférentiellement un angle de 45° avec l’axe de révolution 12 du corps 5. The tip 6 is fixed to the body 5, so that the first segment 15 of said tip 6 extends said body 5. In other words, the body 5 is extended by the first segment 15, which is itself extended by the second segment 16, said second segment 16 ending in the nozzle 7. The second segment 16 extends parallel to the axis of revolution 12 of the body 5, being offset from said axis 12, the first segment 15 and the nozzle 7 being inclined with respect to said second segment 16. Schematically, the end piece 6 is a part U-shaped. A longitudinal axis of the nozzle 7 preferably forms an angle of 45 ° with the axis of revolution 12 of the body 5.
[0033] Une mise en rotation du corps 5 autour de son axe de révolution 12 par A setting in rotation of the body 5 around its axis of revolution 12 by
l’intermédiaire du moyen rotatif motorisé, entraîne une mise en rotation simultanée de l’embout 6 qui est solidarisé audit corps 5, et donc une mise en rotation simultanée de la buse 7 qui fait partie intégrante dudit embout 6. the intermediary of the motorized rotary means, causes a simultaneous rotation of the nozzle 6 which is secured to said body 5, and therefore a simultaneous rotation of the nozzle 7 which is an integral part of said nozzle 6.
[0034] En se référant aux figures 1 et 2, la culasse 2 est supporté par un élément de support 20 qui est dissocié du dispositif 1 de dépôt. De cette manière, la mise en rotation du dispositif 1 de dépôt est sans influence sur le positionnement de l’élément de support 20 et inversement. L’élément de support 20 possède une position réglable, permettant d’ajuster la position de la culasse 2 par rapport au dispositif de dépôt 1 . La culasse 2 présente schématiquement plusieurs ouvertures 14 circulaires, destinées chacune à recevoir une soupape. Chaque ouverture 14 est associée à un guide 25 de soupape et est délimitée par une paroi tronconique 21 , destinée à recevoir le revêtement diffusé par le dispositif de dépôt 1 , afin de fabriquer un siège 3 de soupape. Grâce à la position réglable de l’élément de support 20, il est possible d’ajuster la distance séparant l’extrémité 23 de la buse 7 par laquelle va sortir le revêtement et la paroi tronconique 21 délimitant une ouverture 14 de la culasse 2 et destinée à recevoir le revêtement. Referring to Figures 1 and 2, the cylinder head 2 is supported by a support member 20 which is separate from the deposit device 1. In this way, the rotation of the deposition device 1 has no influence on the positioning of the support element 20 and vice versa. The support member 20 has an adjustable position, allowing the position of the cylinder head 2 to be adjusted relative to the deposition device 1. The cylinder head 2 schematically has several circular openings 14, each intended to receive a valve. Each opening 14 is associated with a valve guide 25 and is delimited by a frustoconical wall 21, intended to receive the coating diffused by the deposition device 1, in order to manufacture a valve seat 3. Thanks to the adjustable position of the support element 20, it is possible to adjust the distance separating the end 23 of the nozzle 7 through which the coating will exit and the frustoconical wall 21 delimiting an opening 14 of the cylinder head 2 and intended to receive the coating.
[0035] Un procédé de dépôt d’un revêtement à partir d’un dispositif 1 selon A method of depositing a coating from a device 1 according to
l’invention, comprend les étapes suivantes : the invention comprises the following steps:
-Une étape de réglage de la position de l’élément de support 20 dans lequel est placé la culasse 2, afin d’ajuster la distance entre l’extrémité 23 de la buse 7 et la paroi tronconique 21 délimitant une ouverture 14 de la culasse 2 et destinée à recevoir ledit revêtement, -A step of adjusting the position of the support element 20 in which the cylinder head 2 is placed, in order to adjust the distance between the end 23 of the nozzle 7 and the frustoconical wall 21 defining an opening 14 of the cylinder head 2 and intended to receive said coating,
-Une étape de mise en rotation du corps 5 du dispositif 1 autour de son axe de révolution 12 entraînant une mise en rotation simultanée de la buse 7 qui est solidarisée audit corps 5 par l’intermédiaire de l’embout 6. Cette étape de mise en rotation est réalisée au moyen d’un actionnement de l’élément de mise en rotation. -A step of rotating the body 5 of the device 1 around its axis of revolution 12 causing simultaneous rotation of the nozzle 7 which is secured to said body 5 by means of the nozzle 6. This step of placing rotation is carried out by means of an actuation of the rotating element.
-Une étape de dépôt du revêtement sur la paroi tronconique 21 de la culasse 2 délimitant l’ouverture 14, pour créer un siège 22 de soupape. En effet, lors de la mise en rotation de la buse 7 autour de l’axe de révolution 12 du corps 5, l’extrémité 23 de ladite buse 7 va pivoter sur 360° de manière à déposer le revêtement sur la totalité de la paroi tronconique 21 délimitant l’ouverture 14. Le dépôt du revêtement sera effectif après plusieurs rotations de 360°de la buse 7. -A step of depositing the coating on the frustoconical wall 21 of the cylinder head 2 delimiting the opening 14, to create a valve seat 22. Indeed, during the rotation of the nozzle 7 around the axis of revolution 12 of the body 5, the end 23 of said nozzle 7 will rotate through 360 ° so as to deposit the coating on the whole of the frustoconical wall 21 delimiting the opening 14. The coating will be deposited after several 360 ° rotations of the nozzle 7.
[0036] , [0036],

Claims

Revendications Claims
[Revendication 1 ] Dispositif (1 ) de dépôt d’un revêtement sur une paroi fermée (21 ) d’une culasse (2) délimitant une ouverture (14) destinée à recevoir une soupape afin de fabriquer un siège (3) de soupape, ledit dispositif possédant une buse (7) de sortie allongée et apte à diffuser un matériau constitutif du revêtement au moyen d’au moins un gaz chaud à très haute vitesse, caractérisé en qu’il comprend un moyen de mise en rotation de la buse (7) permettant à ladite buse (7) d’effectuer au moins une fois un déplacement rotatif sur 360°afin de déposer le rev êtement sur la totalité de ladite paroi (1 1 ). [Claim 1] Device (1) for depositing a coating on a closed wall (21) of a cylinder head (2) defining an opening (14) intended to receive a valve in order to manufacture a valve seat (3), said device having an elongated outlet nozzle (7) and capable of diffusing a material constituting the coating by means of at least one hot gas at very high speed, characterized in that it comprises means for rotating the nozzle ( 7) allowing said nozzle (7) to perform at least once a 360 ° rotary movement in order to deposit the coating on the whole of said wall (1 1).
[Revendication 2] Dispositif selon la revendication 1 , caractérisé en ce qu’il comprend un corps (5) creux doté d’un élément de chauffage (13) apte à chauffer ledit au moins un gaz et auquel est solidarisée la buse (7), et en ce que l’élément de mise en rotation est apte à mettre en rotation ledit corps (5). [Claim 2] Device according to claim 1, characterized in that it comprises a hollow body (5) provided with a heating element (13) capable of heating said at least one gas and to which the nozzle (7) is secured. , and in that the rotating element is adapted to rotate said body (5).
[Revendication 3] Dispositif selon la revendication 2, caractérisé en ce que le corps (5) est cylindrique et la buse (7) est inclinée par rapport à l’axe de révolution (12) dudit corps (5), et en ce que l’élément de mise en rotation provoque une rotation du corps (5) autour dudit axe (12). [Claim 3] Device according to claim 2, characterized in that the body (5) is cylindrical and the nozzle (7) is inclined with respect to the axis of revolution (12) of said body (5), and in that the rotating element causes the body (5) to rotate around said axis (12).
[Revendication 4] Dispositif selon la revendication 3, caractérisé en ce [Claim 4] Device according to claim 3, characterized in that
qu’un axe longitudinal de la buse (7) est incliné de 45°par rapport à l’axe de révolution (12) du corps (5). that a longitudinal axis of the nozzle (7) is inclined 45 ° relative to the axis of revolution (12) of the body (5).
[Revendication 5] Dispositif selon l’une quelconque des revendications 1 à [Claim 5] Device according to any one of claims 1 to
4, caractérisé en ce que le gaz est de l’azote haute pression. 4, characterized in that the gas is high pressure nitrogen.
[Revendication 6] Dispositif selon l’une quelconque des revendications 1 à [Claim 6] Device according to any one of claims 1 to
5, caractérisé en ce que la buse (7) est une tuyère de Laval. 5, characterized in that the nozzle (7) is a Laval nozzle.
[Revendication 7] Dispositif selon l’une quelconque des revendications 1 à [Claim 7] Device according to any one of claims 1 to
6, caractérisé en ce que le matériau constitutif du revêtement est pulvérulent et comprend des particules d’acier, des particules d’alliage de Nickel et des particules de cuivre. 6, characterized in that the material constituting the coating is powdery and comprises particles of steel, particles of nickel alloy and particles of copper.
[Revendication 8] Appareillage apte à déposer un revêtement sur une paroi fermée (21 ) d’une culasse (2) délimitant une ouverture (14) destinée à recevoir une soupape afin de fabriquer un siège (3) de soupape, caractérisé en ce qu’il comprend un dispositif (1 ) de dépôt conforme à l’une quelconque des revendications 1 à 7 et un élément de support (20) de la culasse (2) dont la position est figée lorsque la buse (7) est mise en rotation pour déposer le revêtement. [Claim 8] Apparatus capable of depositing a coating on a closed wall (21) of a cylinder head (2) delimiting an opening (14) intended to receive a valve in order to manufacture a valve seat (3), characterized in that 'it comprises a deposit device (1) in accordance with any one of claims 1 to 7 and a support member (20) of the cylinder head (2), the position of which is fixed when the nozzle (7) is rotated to deposit the coating.
[Revendication 9] Appareillage selon la revendication 8, caractérisé en ce que la distance séparant le dispositif (1 ) de dépôt et l’élément de de support (20) est ajustable de manière à régler la distance séparant une extrémité (23) de la buse (7) par laquelle est diffusée le matériau constitutif du revêtement et la paroi (21 ) de la culasse (2) destinée à recevoir ledit revêtement. [Claim 9] An apparatus according to claim 8, characterized in that the distance separating the depositing device (1) and the support element (20) is adjustable so as to adjust the distance separating one end (23) of the nozzle (7) through which the material constituting the coating is diffused and the wall (21) of the cylinder head (2) intended to receive said coating.
[Revendication 10] Procédé de dépôt d’un revêtement sur une paroi (21 ) d’une culasse (2) délimitant une ouverture (14) destinée à recevoir une soupape pour fabriquer un siège (3) de soupape à partir d’un appareillage conforme à l’une quelconque des revendications 8 ou 9, caractérisé en ce qu’il comprend les étapes suivantes, [Claim 10] A method of depositing a coating on a wall (21) of a cylinder head (2) defining an opening (14) intended to receive a valve for manufacturing a valve seat (3) from an apparatus according to any one of claims 8 or 9, characterized in that it comprises the following steps,
-Une étape de réglage de la distance entre le dispositif (1 ) de dépôt et l’élément de support (20) de la culasse afin de régler la distance séparant la buse (7) et la paroi (21 ) de la culasse (2) délimitant l’ouverture (14), -A step of adjusting the distance between the deposit device (1) and the support element (20) of the cylinder head in order to adjust the distance between the nozzle (7) and the wall (21) of the cylinder head (2) ) delimiting the opening (14),
-Une étape de mise en rotation de la buse (7) au moyen d’une mise en rotation du corps (5) autour de son axe de révolution (12) par l’intermédiaire d’un actionnement de l’élément de mise en rotation, -A step of rotating the nozzle (7) by means of rotating the body (5) around its axis of revolution (12) by means of an actuation of the setting element rotation,
-Une étape de dépôt du revêtement sur la totalité de la paroi (21 ) de la culasse (2) délimitant l’ouverture (14), pour créer le siège (3) de la soupape. -A step of depositing the coating on the entire wall (21) of the cylinder head (2) delimiting the opening (14), to create the seat (3) of the valve.
EP20733277.6A 2019-06-19 2020-06-17 Device for depositing a coating for manufacturing a valve seat Pending EP3987075A1 (en)

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FR1906599A FR3097561B1 (en) 2019-06-19 2019-06-19 Device for depositing a coating for the manufacture of a valve seat
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WO2020254371A1 (en) 2020-12-24
FR3097561A1 (en) 2020-12-25
FR3097561B1 (en) 2023-05-19

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