EP3856459B1 - Procédé de traitement de surface d'un composant par abrasion - Google Patents

Procédé de traitement de surface d'un composant par abrasion Download PDF

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Publication number
EP3856459B1
EP3856459B1 EP19779389.6A EP19779389A EP3856459B1 EP 3856459 B1 EP3856459 B1 EP 3856459B1 EP 19779389 A EP19779389 A EP 19779389A EP 3856459 B1 EP3856459 B1 EP 3856459B1
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Prior art keywords
flow
hydraulic diameter
duct
carrier material
radius
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EP19779389.6A
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German (de)
English (en)
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EP3856459A1 (fr
Inventor
Mathias WEICKERT
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BASF SE
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BASF SE
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/006—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor for grinding the interior surfaces of hollow workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • 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

Definitions

  • Flow grinding processes are processing processes in which a surface to be processed is flowed over by a flowable carrier material containing abrasive particles, in particular a liquid containing abrasive particles.
  • the abrasive particles contained in the flowable carrier material hit the surface of the component to be processed during the flow, whereby the corresponding surface is erosed by the abrasive particles removing material from the component upon impact.
  • the flowable carrier material is a liquid
  • the flow grinding process is also called a hydroerosive process or hydroerosive grinding process.
  • Flow grinding processes can be used, for example, to treat the surfaces of 3D-printed components made of metal, ceramic and/or plastic that have a surface roughness between 50 and 500 ⁇ m. These surface roughnesses cause undesirable effects when using the corresponding components, for example fouling or increased pressure loss.
  • the geometry of the component may have to be modified during the manufacturing process, especially when manufactured using a 3D printing process, and the grinding process must be able to be adjusted precisely and in a controlled manner.
  • a mathematical simulation of hydroerosive grinding is, for example, in PA Rizkalla, Development of a Hydroerosion Model using a Semi-Empirical Method Coupled with an Euler-Euler Approach, PhD thesis, Royal Melbourne Institute of Technology, University of Melbourne, November 2007, pages 36 to 44 described.
  • the disadvantage of the known methods is that when the surfaces to be machined are not planar, flow separation can occur, which results in cavitation and thus undesirable material removal and can thus lead to damage to the surface to be machined.
  • a mathematical simulation of the grinding process is complex.
  • the object of the present invention is therefore to provide a method in which the surfaces of the component to be machined are not damaged and which is less complex than mathematical simulations.
  • the flowable carrier material containing the abrasive particles is, for example, water, oil or a highly viscous grease, i.e. a grease with a viscosity at processing temperature in the range from 100 to 1,000,000 Pa•s, in particular with a viscosity in the range from 1,000 to 200,000 Pa•s.
  • the flowable carrier material is particularly preferably oil, in particular a hydraulic oil.
  • the proportion of abrasive particles in the flowable carrier material is preferably in the range from 1 to 80 vol.%, in particular in the range from 2 to 60 vol.%.
  • the proportion of abrasive particles is preferably in the range from 1 to 50 vol.%, more preferably in the range from 1 to 20 vol.% and in particular in the range from 1 to 5 vol.% and when using a highly viscous grease as the flowable carrier material, the proportion of abrasive particles is preferably in the range from 20 to 80 vol.% and in particular in the range from 40 to 60 vol.%.
  • the material used for the grinding particles depends on the material of the component to be processed. If the component is made of metal or ceramic, grinding particles made of boron carbide or diamond are preferably used. For a component made of plastic, grinding particles made of boron carbide, diamond, sand or silicon are particularly suitable.
  • the shape and size of the grinding particles also depend on the material of the component to be processed and on the desired surface quality, in particular the desired surface roughness and the size of the structure to be processed. Suitable particle shapes for the grinding particles are in particular sharp-edged particles, for example broken particles.
  • Suitable grinding particles preferably have a size distribution of 1 to 1000 ⁇ m and in particular a size distribution of 1 to 10 ⁇ m when using oil and 10 ⁇ m to 1000 ⁇ m when using grease.
  • the component For processing by flow grinding, the component is first placed in a channel through which the flowable carrier material containing the grinding particles flows. If external surfaces of the component are to be processed, the component is placed in the channel in such a way that the flowable carrier material containing the grinding particles can flow over the surfaces.
  • the component When processing internal surfaces, for example holes, the component is connected to the channel in such a way that the flowable carrier material containing the grinding particles flows through the openings to be processed, for example holes, but does not come into contact with surfaces that are not to be processed.
  • suitable connections can be provided on the component through which the flowable carrier material containing the grinding particles is fed in and flows out of the component again.
  • the blank is rounded off with a radius that corresponds to 0.1 to 2.5 times the average distance between the surface overflowed and the opposite wall of the channel through which the flowable carrier material containing the abrasive particles flows.
  • the blank is rounded off with a radius that corresponds to 0.1 to 2.5 times the average distance between the surface overflowed and the opposite wall of the channel through which the flowable carrier material containing the abrasive particles flows.
  • carrier material changes, rounded with a radius which corresponds to 0.25 to 1.5 times and in particular 0.5 times the average distance between the surface over which the abrasive particles flow and the opposite wall of the channel through which the flowable carrier material containing the abrasive particles flows.
  • the average distance can be determined numerically, for example. However, the average distance is preferably the mean value of the minimum distance between the surface over which the flow occurs and the opposite wall and the maximum distance between the surface over which the flow occurs and the opposite wall.
  • the minimum distance and the maximum distance can both be before the change in flow direction or both after the change in flow direction, or one of the two distances can be before the change in flow direction and the other of the two distances can be behind the flow direction.
  • the channel in the case of a channel through which flow occurs and which changes direction, it is possible, for example, for the channel to have a first hydraulic diameter before the change in direction and a second hydraulic diameter after the change in direction.
  • the first hydraulic diameter can be smaller than the second hydraulic diameter, or the first hydraulic diameter can be larger than the second hydraulic diameter.
  • a change in the flow direction of the flowable carrier material containing the abrasive particles occurs, for example, when a channel into which the blank is introduced and through which the flowable carrier material containing the abrasive particles flows in order to machine the outer surfaces of the blank has a curve or a kink and the blank to be machined is positioned in the area of the curve or kink. Furthermore, a change in the flow direction also occurs when the blank contains a channel and this channel has a curve or a kink and the walls delimiting the channel are to be machined by the flow grinding process. In this case, the channel in the blank is flowed through by the flowable carrier material containing the abrasive particles.
  • the blank is usually positioned in a straight channel without any bends or curvatures and without any constrictions or widenings.
  • a grinding wheel is placed at positions where flow separation is possible on the finished component. occurs, additional material is applied.
  • the additional material on the side facing the flow has an inclined and concave surface in the direction of flow to a central axis of the channel in which the flowable carrier material containing the abrasive particles flows.
  • on the side facing the flow means the side over which the flowable carrier material containing the abrasive particles flows.
  • a component with a rotationally symmetrical projection surface is, for example, a sphere. Any other component that has a circular view in the direction of flow of the flowable carrier material containing the abrasive particles also has a rotationally symmetrical projection surface. Such a component can also have a drop shape, for example, in which case the component is flowed onto at the hemispherical end of the drop.
  • the inclined and concave surface of the additionally applied material has a curvature with a radius in the range of 1 to 5 times the diameter of the rotationally symmetrical projection surface. More preferably, the inclined and concave surface of the additionally applied material has a curvature with a radius in the range of 1.5 to 3 times the diameter of the rotationally symmetrical projection surface, for example a curvature with a radius that corresponds to twice the diameter of the rotationally symmetrical projection surface.
  • the additional material which is attached at positions where flow separation occurs on the finished component, has a surface on the side facing the flow that is inclined and concave in the direction of flow to a central plane running parallel to the direction of flow of the flowable carrier material containing the abrasive particles.
  • the inclined and concave surface to the central plane running parallel to the direction of flow of the flowable carrier material containing the abrasive particles prevents flow separation from occurring, which leads to cavitation and thus uncontrolled material removal.
  • the surface of the additional material which is inclined and concave to the central plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles, has a curvature with a radius in the range of 2 to 10 times the maximum vertical distance from the central plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles to the edge of the non-rotationally symmetrical projection surface.
  • the curvature of the inclined and concave surface particularly preferably has a radius in the range of 3 to 6 times the maximum vertical distance from the central plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles to the edge of the non-rotationally symmetrical projection surface, for example a radius which corresponds to four times the maximum vertical distance from the central plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles to the edge of the non-rotationally symmetrical projection surface.
  • central means that the line of intersection of the plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles with the non-rotationally symmetrical projection surface runs in the middle of the projection surface.
  • the line of intersection of the plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles with the non-rotationally symmetrical projection surface forms the axis of symmetry of the non-rotationally symmetrical projection surface.
  • Components with a non-rotationally symmetrical projection surface are, for example, pipes, shafts or axles whose outer surface is to be machined using the flow grinding process.
  • the pipes, shafts or axles can have any cross-sectional shape, with a round cross-section being particularly suitable for machining using the flow grinding process.
  • the pipe, shaft or axle to be machined is inserted transversely to the flow direction of the flowable carrier material containing the abrasive particles into the channel through which the flowable carrier material containing the abrasive particles is guided, so that the flowed projection surface of the pipe, shaft or axle is a rectangle whose length corresponds to the length of the pipe, shaft or axle and whose height corresponds to the diameter of the pipe, shaft or axle.
  • the central plane running parallel to the flow direction of the flowable carrier material containing the abrasive particles preferably extends parallel to the length of the rectangle and intersects the projection surface at half height.
  • the radius of curvature of the inclined and concave surface is 2 to 10 times the radius of the tube, shaft or axle.
  • the additional material applied must be removed in order to obtain the desired component.
  • a flow-over surface that forms a wall of the channel, the channel having a change in direction, on the wall of the channel, which, due to the change in direction of the channel, is separated from the abrasive particles containing flowable carrier material is applied, material which has a convex surface in the middle and a concave surface towards the outside.
  • the additional material applied to the side against which the flowable carrier material containing the abrasive particles flows prevents the flow grinding from creating a depression in the channel wall.
  • the surface which is convex in the middle and concave towards the outside, supports the deflection of the flowable carrier material containing the abrasive particles and in particular prevents uncontrolled material removal through cavitation.
  • the material applied to the wall is thus removed in a controlled manner by the flow grinding process, so that damage to the channel wall can be easily prevented.
  • the convex surface preferably has a curvature with a radius in the range of 0.5 to 5 times the hydraulic diameter of the channel.
  • the curvature particularly preferably has a radius in the range of 0.5 to 2 times the hydraulic diameter of the channel, for example one time the hydraulic diameter of the channel.
  • the maximum thickness of the applied material preferably corresponds to 0.1 to 0.75 times the hydraulic diameter of the channel, in particular 0.4 to 0.6 times, for example 0.5 times.
  • the outwardly concave surface of the applied material preferably has a curvature with a radius in the range of 0.5 to 5 times the hydraulic diameter of the channel.
  • the outwardly concave surface has a curvature with a radius in the range of 1 to 3 times, for example twice, the hydraulic diameter of the channel.
  • the hydraulic diameter to which the radius of the concave curvature of the applied material and the radius of the convex curvature of the applied material refer is the hydraulic diameter of the channel after the change of direction.
  • the channel has an extension in which the channel increases from a region with a first hydraulic diameter to a region with a second hydraulic diameter, i.e. the second hydraulic diameter is larger than the first hydraulic diameter, wherein a transition section of the wall of the channel between the region with the first hydraulic diameter and the region with the second hydraulic diameter has an angle between 7° and 90°, in particular between 45° and 90° to the main flow direction, cavitation and thus uncontrolled material removal can occur both at the transition section and in the region with the second hydraulic diameter if the flow through the channel is in the direction from the region with the first hydraulic diameter to the region with the second hydraulic diameter. In the case of an opposite flow direction, cavitation can occur with the associated associated uncontrolled material removal in the transition area and the area with the first hydraulic diameter that follows it in the direction of flow.
  • the channel has an extension in which the channel is enlarged from an area with a first hydraulic diameter to an area with a second hydraulic diameter
  • a transition section of the wall of the channel between the area with the first hydraulic diameter and the area with the second hydraulic diameter has an angle of between 7° and 90°, in particular between 45° and 90°, to the main flow direction
  • the surface over which the flow is flowed is convex at the transition from the area with the first hydraulic diameter to the transition section and concave at the transition from the transition section to the area with the second hydraulic diameter.
  • the transition from the transition section to the area with the second hydraulic diameter can also have an angle.
  • the surface which runs convexly at the transition from the region with the first hydraulic diameter to the transition section has a curvature with a radius in the range of 0.05 to 2.5 times the hydraulic diameter of the channel before the expansion.
  • the surface which runs convexly at the transition from the region with the first hydraulic diameter to the transition section has a curvature with a radius in the range of 0.25 to 1 time, for example 0.375 times, the hydraulic diameter of the channel before the expansion.
  • the surface which runs concavely at the transition from the transition section to the region with the second hydraulic diameter preferably has a curvature with a radius in the range of 0.05 to 2.5 times the hydraulic diameter of the channel before the expansion.
  • the curvature of the surface which runs concavely at the transition from the transition section to the region with the second hydraulic diameter has a radius in the range of 0.25 to 1 time, for example 0.375 times, the hydraulic diameter of the channel before the expansion.
  • the blank that is machined using the flow grinding process can be manufactured using various manufacturing processes.
  • the blank can be manufactured using a casting process. It is also possible to manufacture the blank using a machining process.
  • the blank is particularly preferably manufactured using an additive manufacturing process, such as 3D printing.
  • Figure 1 shows a blank with a circular cross-section and material attached to it to prevent stall.
  • a blank 1 with a surface 3 that is to be processed by flow grinding is introduced into a suitable channel through which a flowable carrier material containing abrasive particles flows.
  • additional material 5 is attached to the blank 1 on the side facing away from the flow.
  • the additional material 5 has a surface 11 on the side 7 facing the flow that is inclined and concave in the direction of flow to a central plane 9 that runs parallel to the flow direction 25 of the flowable carrier material containing the abrasive particles.
  • the one in Figure 1 The blank 1 shown has a circular cross-section such as a cylinder or a sphere. If the blank 1 is a cylinder, it has a non-rotationally symmetrical projection surface, namely a rectangular projection surface.
  • the blank is not a cylinder but a sphere, it has a rotationally symmetrical projection surface, in which case the additional material on the side facing the flow has a surface that is inclined and concave in the flow direction 25 to a central axis.
  • the central axis runs in accordance with the central plane 9 through the center of the sphere parallel to the flow direction 25 of the flowable carrier material containing the abrasive particles.
  • the surface 11 inclined to the central plane 9 and running concavely preferably has a curvature with a radius 13 which corresponds to 2 to 10 times the maximum vertical distance from the central plane 9 to the edge of the non-rotationally symmetrical projection surface, that is to say, 2 to 10 times of the radius 15 of the cylindrical blank 1.
  • the surface inclined to the central axis and concave in a spherical blank 1 has a curvature with a radius 13 which corresponds to 1 to 5 times the diameter of the spherical blank 1, that is to say 2 to 10 times the radius of the spherical blank 1.
  • the radius 13 of the curvature of the inclined and concave surface 11 is 3 to 6 times the maximum vertical distance from the central plane 9 to the edge of the non-rotationally symmetrical projection surface or the radius 15 of the rotationally symmetrical projection surface, for example, as in Figure 1 shown, 4 times the radius 15 of the rotationally symmetrical projection surface or cylinder or twice the radius 15 of the rotationally symmetrical projection surface or cylinder.
  • Material is inclined such that the central plane 9 in the case of a blank 1 with a non-rotationally symmetrical projection surface in the flow direction 25 or the central axis in the case of a blank 1 with a rotationally symmetrical projection surface in the flow direction is a tangent of the inclined and concave surface 11.
  • the additional material 5 is also attached symmetrically to the central plane 9, so that the additional material 5 has an inclined and concave surface 11 on both sides of the central plane 9, which ends tangentially to the central plane 9.
  • the additional material 5 is preferably also attached rotationally symmetrically to the blank 1.
  • the additional material is preferably applied in such a way that the radius of the curvature is different on both sides of the central plane 9, so that the central plane 9 forms a tangent to the inclined and curved surface on both sides at the same position in the flow direction of the flowable carrier material containing the abrasive particles.
  • Figure 2 shows a channel through which the flow is carried out, the walls of which are processed by flow loops and which has a change in direction
  • the channel 17 shown has a first section with a first hydraulic diameter 19 and a second section with a second hydraulic diameter 21.
  • the second section adjoins the first section after a change in direction.
  • the convex surface 27 preferably has a curvature with a radius 31 that is in the range of 0.5 to 5 times the hydraulic diameter.
  • the radius 31 of the curvature of the convex surface 27 is particularly preferably 0.5 to 2 times the hydraulic diameter of the channel 17. If the channel 17, as shown here, has a first hydraulic diameter 19 before the change in direction and a second hydraulic diameter 21 after the change in direction, the hydraulic diameter to which the size of the radius 31 refers is the second hydraulic diameter 21.
  • the radius 31 of the curvature of the convex surface is particularly preferably one time the second hydraulic diameter 21, as shown here.
  • the concave surface 29 preferably has a curvature with a radius 33 in the range of 0.5 to 5 times the hydraulic diameter of the channel 17.
  • the radius 33 is particularly preferably 1 to 3 times the hydraulic diameter of the channel 17.
  • the hydraulic diameter to which the radius 33 of the curvature of the concave surface 29 refers is the second hydraulic diameter 21.
  • the radius 33 of the curvature of the convex surface 27 is twice the 2nd hydraulic diameter 21, as shown here.
  • the thickness of the applied additional material 5 has a maximum thickness which corresponds to 0.2 to 0.75 times the hydraulic diameter of the channel 17. Particularly preferably, the thickness of the applied additional material 5 corresponds to 0.5 times the hydraulic diameter of the channel 17, wherein here too the hydraulic diameter to which the thickness of the applied additional material 5 refers is the second hydraulic diameter 21.
  • the wall 37 is rounded.
  • the radius 39 with which the wall 37 is rounded preferably corresponds to 0.1 to 2.5 times the hydraulic diameter of the channel 17, the hydraulic diameter of the channel 17 being the mean hydraulic diameter for a channel with a first hydraulic diameter 19 before the change in direction and a second hydraulic diameter 21 after the change in direction.
  • the arithmetic mean is used here, i.e. the mean hydraulic diameter is calculated from the sum of the first hydraulic diameter 19 and the second hydraulic diameter 21 divided by 2.
  • the radius particularly preferably corresponds to 39 0.25 to 1 times the mean hydraulic diameter and in particular 0.5 times the mean hydraulic diameter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (15)

  1. Procédé de traitement de surface d'un composant par meulage par écoulement, comprenant les étapes suivantes :
    (a) la fourniture d'une ébauche (1),
    (b) le balayage d'au moins une surface de l'ébauche (1) avec un matériau porteur fluide contenant des particules abrasives,
    caractérisé en ce que l'ébauche (1) est arrondie aux positions auxquelles, lors du balayage, la direction d'écoulement (25) du matériau porteur fluide contenant les particules abrasives change, et du matériau supplémentaire (5) est appliqué aux positions auxquelles un décrochage de l'écoulement se produit sur le composant fini, de telle sorte qu'un décrochage de l'écoulement est empêché au début du balayage.
  2. Procédé selon la revendication 1, caractérisé en ce que l'ébauche (1) est arrondie aux positions auxquelles, lors du balayage, la direction d'écoulement (25) du matériau porteur fluide contenant les particules abrasives change avec un rayon (39 ; 57) qui correspond à 0,1 à 2,5 fois la distance moyenne entre la surface balayée et la paroi opposée du canal traversé par le matériau porteur fluide contenant les particules abrasives.
  3. Procédé selon la revendication 1, caractérisé en ce que le matériau supplémentaire (5), qui est appliqué à des positions auxquelles un décrochage de l'écoulement se produit sur le composant fini, présente, sur le côté (7) tourné vers l'écoulement, dans le cas d'un composant ayant une surface de projection symétrique en rotation exposée à l'écoulement, une surface (11) inclinée et concave dans la direction de l'écoulement (25) par rapport à un axe central d'un canal dans lequel s'écoule le matériau porteur fluide contenant les particules abrasives.
  4. Procédé selon la revendication 3, caractérisé en ce que la surface inclinée et concave (11) présente une courbure ayant un rayon (13) dans la plage allant de 1 à 5 fois le diamètre de la surface de projection symétrique en rotation.
  5. Procédé selon la revendication 1, caractérisé en ce que le matériau supplémentaire (5), qui est appliqué à des positions auxquelles un décrochage de l'écoulement se produit sur le composant fini, présente, sur le côté (7) tourné vers l'écoulement, dans le cas d'un composant ayant une surface de projection non symétrique en rotation exposée à l'écoulement, une surface (11) inclinée et concave dans la direction de l'écoulement par rapport à un plan central (9), parallèle à la direction d'écoulement (25) du matériau porteur fluide contenant les particules abrasives.
  6. Procédé selon la revendication 5, caractérisé en ce que la surface inclinée et concave (11) présente une courbure ayant un rayon (13) dans la plage allant de 2 à 10 fois la distance verticale maximale entre le plan central, parallèle à la direction d'écoulement du matériau porteur fluide contenant les particules abrasives, et le bord de la surface de projection non symétrique en rotation.
  7. Procédé selon la revendication 1 ou 2, caractérisé en ce que, dans le cas d'une surface balayée qui forme une paroi d'un canal (17), le canal (17) présentant un changement de direction, du matériau (5) est appliqué sur la paroi (23) du canal (17) qui, en raison du changement de direction du canal (17), est exposée à l'écoulement du matériau porteur fluide contenant les particules abrasives, lequel matériau présente au centre une surface (27) convexe et vers l'extérieur une surface (29) concave.
  8. Procédé selon la revendication 7, caractérisé en ce que la surface convexe (27) présente une courbure ayant un rayon (31) dans la plage allant de 0,5 à 5 fois le diamètre hydraulique (21) du canal (17).
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que le matériau appliqué (5) présente une épaisseur maximale (35) correspondant à 0,1 à 0,75 fois le diamètre hydraulique (21) du canal.
  10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce que la surface concave (29) présente une courbure ayant un rayon (33) dans la plage allant de 0,5 à 5 fois le diamètre hydraulique (21) du canal (17).
  11. Procédé selon la revendication 1, caractérisé en ce que, dans le cas d'une surface balayée qui forme une paroi d'un canal, le canal présentant un élargissement dans lequel le canal est élargi d'une zone ayant un premier diamètre hydraulique à une zone ayant un deuxième diamètre hydraulique, une section de transition de la paroi du canal entre la zone ayant le premier diamètre hydraulique et la zone ayant le deuxième diamètre hydraulique présente un angle compris entre 7° et 90° par rapport à la direction d'écoulement principale, la surface balayée étant convexe à la transition de la zone ayant le premier diamètre hydraulique vers la section de transition.
  12. Procédé selon la revendication 11, caractérisé en ce que la surface convexe à la transition de la zone ayant le premier diamètre hydraulique vers la section de transition présente une courbure ayant un rayon dans la plage allant de 0,05 à 2,5 fois le diamètre hydraulique du canal avant l'élargissement.
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que la surface balayée est concave à la transition de la section de transition vers la zone ayant le deuxième diamètre hydraulique.
  14. Procédé selon la revendication 13, caractérisé en ce que la surface concave au niveau de la transition de la section de transition vers la zone ayant le deuxième diamètre hydraulique présente une courbure ayant un rayon dans la plage allant de 0,05 à 2,5 fois le diamètre hydraulique du canal avant l'élargissement.
  15. Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le matériau porteur fluide est de l'eau, de l'huile ou une graisse à viscosité élevée.
EP19779389.6A 2018-09-24 2019-09-18 Procédé de traitement de surface d'un composant par abrasion Active EP3856459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18196196 2018-09-24
PCT/EP2019/074929 WO2020064444A1 (fr) 2018-09-24 2019-09-18 Procédé de traitement de surface d'une pièce par rectification par écoulement

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EP3856459A1 EP3856459A1 (fr) 2021-08-04
EP3856459B1 true EP3856459B1 (fr) 2024-11-06

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US (1) US20220032425A1 (fr)
EP (1) EP3856459B1 (fr)
JP (1) JP2022502275A (fr)
CN (1) CN112752632B (fr)
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US20220032425A1 (en) 2022-02-03
CN112752632B (zh) 2023-10-27
WO2020064444A1 (fr) 2020-04-02
JP2022502275A (ja) 2022-01-11
CN112752632A (zh) 2021-05-04

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