WO2008029039A2 - Treatment device for shot blasting the inner surface of a tubular part - Google Patents

Treatment device for shot blasting the inner surface of a tubular part Download PDF

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Publication number
WO2008029039A2
WO2008029039A2 PCT/FR2007/051765 FR2007051765W WO2008029039A2 WO 2008029039 A2 WO2008029039 A2 WO 2008029039A2 FR 2007051765 W FR2007051765 W FR 2007051765W WO 2008029039 A2 WO2008029039 A2 WO 2008029039A2
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WO
WIPO (PCT)
Prior art keywords
shot
opening
nozzle
blasting
treatment
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Application number
PCT/FR2007/051765
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French (fr)
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WO2008029039A3 (en
Inventor
Soll Sanchez
Original Assignee
Renault S.A.S.
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Publication date
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2008029039A2 publication Critical patent/WO2008029039A2/en
Publication of WO2008029039A3 publication Critical patent/WO2008029039A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface

Definitions

  • the invention relates to a method of blasting the inner surface of a tube.
  • the invention also relates to a device for implementing such a method.
  • shot blasting The principle of shot blasting is to project at a high speed against the surface of a workpiece small projectiles (usually balls) called shots.
  • This shot may in particular be metal, glass or ceramic. It is generally driven by compressed air in pipes from which it escapes at a nozzle or by the mechanical action of a turbine.
  • Shot peening can have different purposes. It can be used to clean a part to prepare these surfaces for subsequent surface treatment operation such as painting or metallization.
  • the parameters of the shot peening are defined so as to introduce, under the effect of the impacts of the shot on the surface of the treated part, plastic deformations to produce compressive surface stresses.
  • FIG. 1 a shot blasting nozzle 10 is brought near a first open end 7 of the part 1, and shot 11 is sent into the room. This impacts the interior surface of the room. The shot is discharged through another open end 8 of the part.
  • This technique poses problems of quality of treatment. The effect obtained is difficult to repeat from one room to another and there are significant heterogeneities of treatment on the same room. These heterogeneities are all the more sensitive if the part comprises convergent inner 5 and divergent surfaces 6 (depending on the direction of movement of the shot). Indeed, the converging surfaces are very impacted by the shot while the diverging surfaces are practically not.
  • a movable anvil 20 is moved into the part along it while the shot is projected.
  • the workpiece is placed in position and clamped.
  • the blasting nozzle is placed at one end of the part.
  • an anvil having a shape adapted thereto is introduced into the piece.
  • the shot is thrown into the room while removing the anvil therefrom in a progressive and regulated manner. The bouncing of the shot on the anvil makes it possible to treat the divergent interior surfaces.
  • Another known solution is to introduce the nozzle into the workpiece and to project the shot while rotating the workpiece. This solution is difficult to implement with parts having small transverse dimensions.
  • the object of the invention is to provide a shot blasting process remedying the disadvantages mentioned above and improving the blasting processes known from the prior art.
  • the invention proposes a shot blasting process making it possible to obtain a good recovery ratio (ratio between the treated area and the area to be treated) and a good distribution of the surface stresses, this process also having to be economic.
  • the invention also relates to a device for implementing such a method.
  • the treatment device according to the invention is intended for blasting the inner surface of a tubular part comprising a first opening and a second opening. It comprises at least one nozzle for projecting shot in the second opening and is characterized in that it comprises a means of calibrating the shot flow and a support plate intended to come at the level of the first opening.
  • the means for calibrating the shot flow may comprise a sheet intended to close the first opening, this sheet nevertheless being provided with a hole intended to evacuate the shot.
  • the device may comprise means for positioning the workpiece.
  • the position-setting means of the part may comprise shoulders on the nozzle and on the means of calibration of the shot flow, these shoulders being adjusted to the shapes of the first and second openings.
  • the device can include different nozzles to process as many pieces simultaneously.
  • the method according to the invention is intended for the shot peening treatment of the inner surface of a tubular part comprising a first opening and a second opening. It is characterized in that it comprises the following steps: setting up a shot flow calibration means and a support plate at the first opening, projecting the shot into the second opening.
  • the invention also relates to a part obtained by the treatment method defined above.
  • the attached drawing shows, by way of example, an embodiment of the shot blasting process according to the invention.
  • Figure 1 is a diagram illustrating a first known shot peening process of the prior art.
  • Fig. 2 is a diagram illustrating a second known shot peening process of the prior art.
  • Figure 3 is a diagram illustrating an embodiment of the shot blasting process according to the invention.
  • the blast treatment device shown in FIG. 3 mainly comprises a shot projection nozzle 10, a shot-rate calibration means 21 providing an anvil and shot-rate limiter function and a support plate. 30.
  • This part comprises a first opening 8 to one from its ends and a second opening 7 to the other of its ends.
  • This part comprises cylindrical portions 2, 3 and 4 and conical portions 5 and 6, the portion 5 being convergent and the portion 6 being divergent (relative to the flow of shot in the room).
  • the piece 10 shown in Figure 3 has a shape of revolution, however, it could have more complex shapes.
  • the nozzle 10 is supplied with compressed air and shot.
  • the shot is driven by the flow of compressed air.
  • the nozzle is positioned at the second opening 7 of the part.
  • the means for calibrating the shot flow comprises, for example, a steel sheet 21 closing the first opening of the workpiece. This sheet is nevertheless pierced with a hole 22 of axis parallel to the flow of gas and shot in the room. This hole allows the shot shot in the room to escape. It is calibrated to regulate the flow of shot. It is understood that the dimensions of this hole depend in particular on the size of the shot and the desired shot rate.
  • the support plate 30 is arranged. It is for example fastened to the sheet 21 by means of spacers 23 providing, between these two elements, a space necessary for the flow of the shot which is then mainly by gravity. The shot can then be collected to be projected again in the workpiece.
  • the means of calibrating the shot flow creates a disturbance in the flow of the shot. This ensures a treatment, by rebound of the shot, divergent portions of the part, including the diverging portion 6.
  • the blasting time and the dimensions of the hole 22 determine the recovery rate and the distribution of surface stresses.
  • the backing plate is there to stop the projected shot through hole 22.
  • the nozzle and the calibration means may advantageously comprise shoulders whose dimensions correspond to those of the sections of the inner or outer ends of the workpiece. In this way the workpiece can be held in position by means of the nozzle and by means of calibration. All that is required is a slight back-and-forth movement of the nozzle or the calibration means along the axis of the part in order to place the part on the treatment device or to remove it from the treatment device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Processing Of Meat And Fish (AREA)
  • Casting Devices For Molds (AREA)

Abstract

The treatment device is intended for shot blasting the inner surface of a tubular part (1) comprising a first opening (8) and a second opening (7). Said device comprises at least one nozzle (10) for projecting shot into the second opening and is characterized in that it comprises a means (21) for calibrating the rate of shot and a bearing plate (30) intended to bear at the first opening.

Description

Dispositif de traitement pour le αrenaillaαe de la surface intérieure d'une pièce tubulaire Treatment device for the retenration of the inner surface of a tubular piece
L'invention concerne un procédé de grenaillage de la surface intérieure d'un tube. L'invention concerne également un dispositif pour mettre en œuvre un tel procédé.The invention relates to a method of blasting the inner surface of a tube. The invention also relates to a device for implementing such a method.
Le principe du grenaillage consiste à projeter à grande vitesse contre la surface d'une pièce à traiter de petits projectiles (en général des billes) appelés grenailles. Cette grenaille peut notamment être en métal, en verre ou en céramique. Elle est en général entraînée grâce à de l'air comprimé dans des conduites d'où elle s'échappe au niveau d'une buse ou par l'action mécanique d'une turbine.The principle of shot blasting is to project at a high speed against the surface of a workpiece small projectiles (usually balls) called shots. This shot may in particular be metal, glass or ceramic. It is generally driven by compressed air in pipes from which it escapes at a nozzle or by the mechanical action of a turbine.
Le grenaillage peut avoir différents buts. Il peut servir à nettoyer une pièce afin de préparer ces surfaces pour une opération de traitement de surface ultérieure telle qu'une opération de peinture ou de métallisation.Shot peening can have different purposes. It can be used to clean a part to prepare these surfaces for subsequent surface treatment operation such as painting or metallization.
Il peut aussi être utilisé dans le but d'améliorer la tenue mécanique des pièces traitées. C'est ce but qui intéresse l'objet de la présente demande.It can also be used for the purpose of improving the mechanical strength of the treated parts. This is the purpose of the subject of this application.
Dans ce cas, les paramètres du grenaillage sont définis de manière à introduire, sous l'effet des impacts de la grenaille sur la surface de la pièce traitée, des déformations plastiques pour produire des contraintes superficielles de compression. Ces contraintes s'opposent aux efforts que la pièce subit par la suite lorsqu'elle est utilisée pour assurer la fonction pour laquelle elle a été conçue. Les caractéristiques mécaniques de la pièce traitée sont ainsi améliorées, la pièce est notamment plus résistante aux sollicitations dynamiques entraînant des phénomènes de fatigue.In this case, the parameters of the shot peening are defined so as to introduce, under the effect of the impacts of the shot on the surface of the treated part, plastic deformations to produce compressive surface stresses. These constraints oppose the efforts that the piece undergoes later when it is used to perform the function for which it was designed. The mechanical characteristics of the treated part are thus improved, the part is particularly resistant to dynamic stresses resulting in fatigue phenomena.
Pour obtenir un bon traitement de la pièce, un certain nombre de paramètres doivent être déterminés : le diamètre de la grenaille, sa matière, sa vitesse, son angle d'impact. Tous ces paramètres doivent être maîtrisés pour assurer un traitement uniforme sur toute la surface de la pièce et répétable d'une pièce à l'autre.To obtain a good treatment of the part, a certain number of parameters must be determined: the diameter of the shot, its material, its speed, its angle of impact. All these parameters must be mastered to ensure uniform treatment over the entire surface of the room and repeatable from one room to another.
Dans certaines applications et notamment dans l'industrie automobile, il est nécessaire de traiter par grenaillage les surfaces intérieures de pièces tubulaires. Le traitement de ce genre de pièces pose des problèmes. Il est connu de traiter ces pièces par une technique dite de jet libre, illustrée à la figure 1 : on amène une buse 10 de grenaillage à proximité d'une première extrémité ouverte 7 de la pièce 1 et on envoie de la grenaille 11 dans la pièce. Celle-ci impacte la surface intérieure de la pièce. La grenaille est évacuée par une autre extrémité ouverte 8 de la pièce. Cette technique pose des problèmes de qualité du traitement. L'effet obtenu est difficilement répétable d'une pièce à une autre et on note des hétérogénéités sensibles de traitement sur une même pièce. Ces hétérogénéités sont d'autant plus sensibles si la pièce comprend des surfaces intérieures convergentes 5 et divergentes 6 (selon le sens de déplacement de la grenaille). En effet, les surfaces convergentes sont très impactées par la grenaille alors que les surfaces divergentes ne le sont pratiquement pas.In some applications and particularly in the automotive industry, it is necessary to process shot peening the inner surfaces of tubular parts. The treatment of this kind of parts is problematic. It is known to treat these parts by a so-called free jet technique, illustrated in FIG. 1: a shot blasting nozzle 10 is brought near a first open end 7 of the part 1, and shot 11 is sent into the room. This impacts the interior surface of the room. The shot is discharged through another open end 8 of the part. This technique poses problems of quality of treatment. The effect obtained is difficult to repeat from one room to another and there are significant heterogeneities of treatment on the same room. These heterogeneities are all the more sensitive if the part comprises convergent inner 5 and divergent surfaces 6 (depending on the direction of movement of the shot). Indeed, the converging surfaces are very impacted by the shot while the diverging surfaces are practically not.
Pour remédier à ces inconvénients, il est connu de traiter les surfaces intérieures des pièces par grenaillage grâce à une autre technique dite à enclume mobile. Selon cette technique représentée à la figure 2, une enclume mobile 20 est déplacée dans la pièce le long de celle-ci pendant que la grenaille est projetée. Dans une première étape, on met en position la pièce à traiter et on la bride. Dans une deuxième étape, on met en place la buse de grenaillage à une extrémité de la pièce. Dans une troisième étape, on introduit dans la pièce une enclume ayant une forme adaptée à celle-ci. Dans une quatrième étape, on projette la grenaille dans la pièce tout en retirant de celle-ci l'enclume de manière progressive et régulée. Les rebonds de la grenaille sur l'enclume permettent de traiter les surfaces intérieures divergentes. Une autre solution connue est d'introduire la buse dans la pièce et de projeter la grenaille tout en entraînant en rotation la pièce. Cette solution est difficile à mettre en œuvre avec des pièces ayant de faibles dimensions transversales.To overcome these drawbacks, it is known to treat the interior surfaces of the parts by shot blasting with another technique called mobile anvil. According to this technique shown in Figure 2, a movable anvil 20 is moved into the part along it while the shot is projected. In a first step, the workpiece is placed in position and clamped. In a second step, the blasting nozzle is placed at one end of the part. In a third step, an anvil having a shape adapted thereto is introduced into the piece. In a fourth step, the shot is thrown into the room while removing the anvil therefrom in a progressive and regulated manner. The bouncing of the shot on the anvil makes it possible to treat the divergent interior surfaces. Another known solution is to introduce the nozzle into the workpiece and to project the shot while rotating the workpiece. This solution is difficult to implement with parts having small transverse dimensions.
Le but de l'invention est de fournir un procédé de grenaillage remédiant aux inconvénients évoqués précédemment et améliorant les procédés de grenaillage connus de l'art antérieur. En particulier, l'invention propose un procédé de grenaillage permettant d'obtenir un bon taux de recouvrement (rapport entre l'aire traitée et l'aire devant être traitée) et une bonne répartition des contraintes de surface, ce procédé devant en outre être économique. L'invention concerne également un dispositif pour mettre en œuvre un tel procédé.The object of the invention is to provide a shot blasting process remedying the disadvantages mentioned above and improving the blasting processes known from the prior art. In particular, the invention proposes a shot blasting process making it possible to obtain a good recovery ratio (ratio between the treated area and the area to be treated) and a good distribution of the surface stresses, this process also having to be economic. The invention also relates to a device for implementing such a method.
Le dispositif de traitement selon l'invention est destiné au grenaillage de la surface intérieure d'une pièce tubulaire comprenant une première ouverture et une deuxième ouverture. Il comprend au moins une buse pour projeter de la grenaille dans la deuxième ouverture et est caractérisé en ce qu'il comprend un moyen de calibrage du débit de grenaille et une plaque d'appui destinés à venir au niveau de la première ouverture.The treatment device according to the invention is intended for blasting the inner surface of a tubular part comprising a first opening and a second opening. It comprises at least one nozzle for projecting shot in the second opening and is characterized in that it comprises a means of calibrating the shot flow and a support plate intended to come at the level of the first opening.
Le moyen de calibrage du débit de grenaille peut comprendre une tôle destinée à obturer la première ouverture, cette tôle étant néanmoins munie d'un trou destiné à évacuer la grenaille.The means for calibrating the shot flow may comprise a sheet intended to close the first opening, this sheet nevertheless being provided with a hole intended to evacuate the shot.
Le dispositif peut comprendre des moyens de mise en position de la pièce.The device may comprise means for positioning the workpiece.
Les moyens de mise en position de la pièce peuvent comprendre des épaulements sur la buse et sur le moyen de calibrage du débit de grenaille, ces épaulements étant ajustés aux formes des première et deuxième ouvertures. Le dispositif peut comprendre différentes buses pour traiter autant de pièces simultanément.The position-setting means of the part may comprise shoulders on the nozzle and on the means of calibration of the shot flow, these shoulders being adjusted to the shapes of the first and second openings. The device can include different nozzles to process as many pieces simultaneously.
Le procédé selon l'invention est destiné au traitement par grenaillage de la surface intérieure d'une pièce tubulaire comprenant une première ouverture et une deuxième ouverture. Il est caractérisé en ce qu'il comprend les étapes suivantes : mettre en place un moyen de calibrage de débit de grenaille et une plaque d'appui au niveau de la première ouverture, projeter la grenaille dans la deuxième ouverture.The method according to the invention is intended for the shot peening treatment of the inner surface of a tubular part comprising a first opening and a second opening. It is characterized in that it comprises the following steps: setting up a shot flow calibration means and a support plate at the first opening, projecting the shot into the second opening.
L'invention concerne encore une pièce obtenue par le procédé de traitement défini précédemment.The invention also relates to a part obtained by the treatment method defined above.
Le dessin annexé représente, à titre d'exemple, un mode d'exécution du procédé de grenaillage selon l'invention.The attached drawing shows, by way of example, an embodiment of the shot blasting process according to the invention.
La figure 1 est un schéma illustrant un premier procédé de traitement par grenaillage connu de l'art antérieur.Figure 1 is a diagram illustrating a first known shot peening process of the prior art.
La figure 2 est un schéma illustrant un deuxième procédé de traitement par grenaillage connu de l'art antérieur.Fig. 2 is a diagram illustrating a second known shot peening process of the prior art.
La figure 3 est un schéma illustrant un mode d'exécution du procédé de traitement par grenaillage selon l'invention.Figure 3 is a diagram illustrating an embodiment of the shot blasting process according to the invention.
Le dispositif de traitement par grenaillage représenté à la figure 3 comprend principalement une buse 10 de projection de grenaille 11 , un moyen 21 de calibrage du débit de grenaille assurant une fonction d'enclume et de limiteur de débit de grenaille et une plaque d'appui 30.The blast treatment device shown in FIG. 3 mainly comprises a shot projection nozzle 10, a shot-rate calibration means 21 providing an anvil and shot-rate limiter function and a support plate. 30.
Il est destiné au traitement par grenaillage de la surface intérieure d'une pièce tubulaire 1. Cette pièce comprend un première ouverture 8 à l'une de ses extrémités et une deuxième ouverture 7 à l'autre de ses extrémités. Cette pièce comprend des portions cylindriques 2, 3 et 4 et des portions coniques 5 et 6, la portion 5 étant convergente et la portion 6 étant divergente (relativement au flux de grenaille dans la pièce). La pièce 10 représentée sur la figure 3 à une forme de révolution, cependant, elle pourrait avoir des formes plus complexes.It is intended for treatment by blasting the inner surface of a tubular part 1. This part comprises a first opening 8 to one from its ends and a second opening 7 to the other of its ends. This part comprises cylindrical portions 2, 3 and 4 and conical portions 5 and 6, the portion 5 being convergent and the portion 6 being divergent (relative to the flow of shot in the room). The piece 10 shown in Figure 3 has a shape of revolution, however, it could have more complex shapes.
La buse 10 est alimentée en air comprimé et en grenaille. La grenaille est entraînée par le flux de l'air comprimé. Ainsi, la grenaille est projetée hors de la buse avec le gaz. La buse est positionnée au niveau de la deuxième ouverture 7 de la pièce.The nozzle 10 is supplied with compressed air and shot. The shot is driven by the flow of compressed air. Thus, the shot is thrown out of the nozzle with the gas. The nozzle is positioned at the second opening 7 of the part.
Au niveau de la première ouverture 8 de la pièce, on positionne le moyen de calibrage du débit de grenaille et la plaque d'appui. Le moyen de calibrage du débit de grenaille comprend par exemple une tôle d'acier 21 obturant la première ouverture de la pièce. Cette tôle est néanmoins percée d'un trou 22 d'axe parallèle au flux de gaz et de grenaille dans la pièce. Ce trou permet à la grenaille projetée dans la pièce de s'échapper. Il est calibré pour réguler le débit de grenaille. On comprend que les dimensions de ce trou dépendent notamment des dimensions de la grenaille et du débit de grenaille désiré. En vis-à-vis de ce trou, on dispose la plaque d'appui 30. Celle-ci est par exemple fixée à la tôle 21 à l'aide d'entretoises 23 ménageant, entre ces deux éléments, un espace nécessaire à l'écoulement de la grenaille qui se fait alors principalement par gravité. La grenaille peut alors être collectée pour être de nouveau projetée dans la pièce à traiter.At the first opening 8 of the part, the calibration means of the shot flow and the support plate are positioned. The means for calibrating the shot flow comprises, for example, a steel sheet 21 closing the first opening of the workpiece. This sheet is nevertheless pierced with a hole 22 of axis parallel to the flow of gas and shot in the room. This hole allows the shot shot in the room to escape. It is calibrated to regulate the flow of shot. It is understood that the dimensions of this hole depend in particular on the size of the shot and the desired shot rate. Opposite this hole, the support plate 30 is arranged. It is for example fastened to the sheet 21 by means of spacers 23 providing, between these two elements, a space necessary for the flow of the shot which is then mainly by gravity. The shot can then be collected to be projected again in the workpiece.
Le moyen de calibrage du débit de grenaille crée une perturbation dans l'écoulement de la grenaille. Ceci assure un traitement, par rebond de la grenaille, des portions divergentes de la pièce, notamment de la portion divergente 6. Le temps de grenaillage et les dimensions du trou 22 déterminent le taux de recouvrement et la répartition des contraintes de surface. La plaque d'appui est là pour arrêter la grenaille projetée à travers le trou 22.The means of calibrating the shot flow creates a disturbance in the flow of the shot. This ensures a treatment, by rebound of the shot, divergent portions of the part, including the diverging portion 6. The blasting time and the dimensions of the hole 22 determine the recovery rate and the distribution of surface stresses. The backing plate is there to stop the projected shot through hole 22.
La buse et le moyen de calibrage peuvent avantageusement comprendre des épaulements dont les dimensions correspondent à celles des sections des extrémités intérieures ou extérieures de la pièce à traiter. De cette façon la pièce peut être maintenue en position grâce à la buse et au moyen de calibrage. Il suffit alors d'un léger mouvement d'aller- retour de la buse ou du moyen de calibrage selon l'axe de la pièce pour mettre en place la pièce sur le dispositif de traitement ou pour retirer celle-ci du dispositif de traitement.The nozzle and the calibration means may advantageously comprise shoulders whose dimensions correspond to those of the sections of the inner or outer ends of the workpiece. In this way the workpiece can be held in position by means of the nozzle and by means of calibration. All that is required is a slight back-and-forth movement of the nozzle or the calibration means along the axis of the part in order to place the part on the treatment device or to remove it from the treatment device.
Bien entendu, on peut avantageusement mettre en œuvre un dispositif comprenant plusieurs buses de projection pour projeter simultanément de la grenaille dans autant de pièces à traiter. On positionne alors, au niveau des différentes pièces, différents moyens de calibrage du débit de grenaille et différentes plaques d'appui. Of course, it is advantageous to implement a device comprising a plurality of spray nozzles for simultaneously projecting shot in as many pieces to be treated. Then, at the different parts, different means of calibration of the shot flow and different support plates are positioned.

Claims

Revendications : 7 Claims: 7
1. Dispositif de traitement destiné au grenaillage de la surface intérieure d'une pièce tubulaire (1) comprenant une première ouverture (8) et une deuxième ouverture (7), le dispositif comprenant au moins une buse (10) pour projeter de la grenaille (11) dans la deuxième ouverture et étant caractérisé en ce qu'il comprend un moyen (21) de calibrage du débit de grenaille et une plaque d'appui (30) destinés à venir au niveau de la première ouverture.A treatment device for blasting the inner surface of a tubular piece (1) comprising a first opening (8) and a second opening (7), the device comprising at least one nozzle (10) for projecting shot (11) in the second opening and being characterized in that it comprises means (21) for calibrating the shot flow and a support plate (30) intended to come to the level of the first opening.
2. Dispositif selon la revendication 1 , caractérisé en ce que le moyen de calibrage du débit de grenaille comprend une tôle (21) destinée à obturer la première ouverture, cette tôle étant néanmoins munie d'un trou (22) destiné à évacuer la grenaille.2. Device according to claim 1, characterized in that the grit flow calibration means comprises a plate (21) for closing the first opening, this sheet being nevertheless provided with a hole (22) for discharging the shot. .
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il comprend des moyens de mise en position de la pièce.3. Device according to claim 1 or 2, characterized in that it comprises means for positioning the workpiece.
4. Dispositif selon la revendication 3, caractérisé en ce que les moyens de mise en position de la pièce comprennent des épaulements sur la buse et sur le moyen de calibrage du débit de grenaille, ces épaulements étant ajustés aux formes des première et deuxième ouvertures.4. Device according to claim 3, characterized in that the positioning means of the workpiece comprises shoulders on the nozzle and the grit flow calibration means, said shoulders being adjusted to the shapes of the first and second openings.
5. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend différentes buses pour traiter autant de pièces simultanément.5. Device according to one of the preceding claims, characterized in that it comprises different nozzles for treating as many parts simultaneously.
6. Procédé de traitement par grenaillage de la surface intérieure d'une pièce tubulaire (1) comprenant une première ouverture (8) et une deuxième ouverture (7), caractérisé en ce qu'il comprend les étapes suivantes : mettre en place un moyen (21) de calibrage de débit de grenaille et une plaque d'appui (30) au niveau de la première ouverture, projeter la grenaille dans la deuxième ouverture.6. Process for treatment by blasting the inner surface of a tubular part (1) comprising a first opening (8) and a second opening (7), characterized in that it comprises the following steps: setting up a shot flow calibration means (21) and a bearing plate (30) at the first opening, projecting the shot into the second opening.
7. Pièce (1) obtenue par le procédé de traitement de la revendication 6. 7. Part (1) obtained by the treatment method of claim 6.
PCT/FR2007/051765 2006-09-05 2007-08-01 Treatment device for shot blasting the inner surface of a tubular part WO2008029039A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0607771 2006-09-05
FR0607771A FR2905290B1 (en) 2006-09-05 2006-09-05 TREATMENT DEVICE FOR THE GRILLING OF THE INNER SURFACE OF A TUBULAR PIECE

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WO2008029039A2 true WO2008029039A2 (en) 2008-03-13
WO2008029039A3 WO2008029039A3 (en) 2008-05-02

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PCT/FR2007/051765 WO2008029039A2 (en) 2006-09-05 2007-08-01 Treatment device for shot blasting the inner surface of a tubular part

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Cited By (3)

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WO2018080881A1 (en) * 2016-10-25 2018-05-03 Sandvik Special Metals Llc System and method for reduction of dimensional end-taper in abrasive blasted tubes
CN110760657A (en) * 2019-11-28 2020-02-07 东阳鑫丹机械科技有限公司 Machine for treating inner surface of steel pipe by using abrasive jetting
CN112779580A (en) * 2020-12-28 2021-05-11 江苏正和实业集团有限公司 Anodic oxidation surface treatment process and device for high-quality aluminum pipe

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
RU2558782C2 (en) * 2013-12-23 2015-08-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Processing of inner cylindrical surfaces by unbound abrasive
FR3077225B1 (en) * 2018-02-01 2020-01-24 Renault S.A.S. PROCESS FOR PRODUCING A TUBULAR AXLE UNSATCHED CROSS-SECTION COMPRISING A BLASTING STAGE

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GB858725A (en) * 1958-07-28 1961-01-11 Ruston & Hornsby Ltd Method and apparatus for cleaning pipes by abrasive blast
DE3235506A1 (en) * 1982-09-24 1984-03-29 Marubeni Construction Machinery Sales, Inc., Tokyo RESTORATION DEVICE FOR FLUID CHANNELS
GB2140337A (en) * 1983-05-25 1984-11-28 Nihon Plant Service Centre Kab Cleaning and lining a pipe
EP0133937A1 (en) * 1983-08-17 1985-03-13 Lonza Ag Process for descaling loops
US6189356B1 (en) * 2000-02-17 2001-02-20 General Electric Company Method and apparatus for peening
EP1312432A2 (en) * 2001-10-30 2003-05-21 Valiant Corporation Apparatus for cleaning engine block passages
EP1568442A1 (en) * 2004-02-25 2005-08-31 François Archer Process of peening and nozzle therefore

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GB858725A (en) * 1958-07-28 1961-01-11 Ruston & Hornsby Ltd Method and apparatus for cleaning pipes by abrasive blast
DE3235506A1 (en) * 1982-09-24 1984-03-29 Marubeni Construction Machinery Sales, Inc., Tokyo RESTORATION DEVICE FOR FLUID CHANNELS
GB2140337A (en) * 1983-05-25 1984-11-28 Nihon Plant Service Centre Kab Cleaning and lining a pipe
EP0133937A1 (en) * 1983-08-17 1985-03-13 Lonza Ag Process for descaling loops
US6189356B1 (en) * 2000-02-17 2001-02-20 General Electric Company Method and apparatus for peening
EP1312432A2 (en) * 2001-10-30 2003-05-21 Valiant Corporation Apparatus for cleaning engine block passages
EP1568442A1 (en) * 2004-02-25 2005-08-31 François Archer Process of peening and nozzle therefore

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018080881A1 (en) * 2016-10-25 2018-05-03 Sandvik Special Metals Llc System and method for reduction of dimensional end-taper in abrasive blasted tubes
US11654531B2 (en) 2016-10-25 2023-05-23 Sandvik Special Metals Llc System for reduction of dimensional end-taper in abrasive blasted tubes
CN110760657A (en) * 2019-11-28 2020-02-07 东阳鑫丹机械科技有限公司 Machine for treating inner surface of steel pipe by using abrasive jetting
CN110760657B (en) * 2019-11-28 2020-08-21 浙江朗宙工贸有限公司 Machine for treating inner surface of steel pipe by using abrasive jetting
CN112779580A (en) * 2020-12-28 2021-05-11 江苏正和实业集团有限公司 Anodic oxidation surface treatment process and device for high-quality aluminum pipe

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FR2905290B1 (en) 2009-07-03
WO2008029039A3 (en) 2008-05-02
FR2905290A1 (en) 2008-03-07

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