EP1537950B1 - Abdeckung zum Schutz von Turbomaschinenschaufeln bei Oberflächenbehandlung - Google Patents

Abdeckung zum Schutz von Turbomaschinenschaufeln bei Oberflächenbehandlung Download PDF

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Publication number
EP1537950B1
EP1537950B1 EP04300818A EP04300818A EP1537950B1 EP 1537950 B1 EP1537950 B1 EP 1537950B1 EP 04300818 A EP04300818 A EP 04300818A EP 04300818 A EP04300818 A EP 04300818A EP 1537950 B1 EP1537950 B1 EP 1537950B1
Authority
EP
European Patent Office
Prior art keywords
mask
blades
blade
mask according
surface treatment
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.)
Expired - Fee Related
Application number
EP04300818A
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English (en)
French (fr)
Other versions
EP1537950A1 (de
Inventor
Lhocine Oussaada
Thierry Labrousse
Thierry Belkheir
Claude Colas
Habib Mehdaoui
Christian Polis
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA 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 SNECMA SAS filed Critical SNECMA SAS
Priority to EP07113930A priority Critical patent/EP1911549B1/de
Publication of EP1537950A1 publication Critical patent/EP1537950A1/de
Application granted granted Critical
Publication of EP1537950B1 publication Critical patent/EP1537950B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated

Definitions

  • the invention relates to the protection of turbomachine blade surfaces in advance of a partial surface having an abrasive character or simply surfaces not to be treated. It also relates to the application of a surface protection for any mechanical part to be subjected to a similar surface treatment,
  • a turbine engine blade 10 here compressor or welding turbojet, is a pay 11 having a front surface and an extrados face 19, a stilt 12 and a foot 13 s entanglement in an axial cavity formed in the axis of the central disc of the support (not shown).
  • a platform 14 separates the blade 11 from the stilt 12.
  • the central disk thus carries a certain number of vanes whose blades are all kept equidistant from one another, in particular by fins 15 situated on a median portion of each face of the vanes and of which, for two adjacent fins of two adjacent vanes, the ends are in contact.
  • the surface treatment of the blade 10, generally made of titanium or titanium alloy, comprises a first treatment E1 of the surface by sandblasting to increase the roughness, in preparation for a second step E2 called metallization with spray deposit thermal.
  • a first treatment E1 of the surface by sandblasting to increase the roughness in preparation for a second step E2 called metallization with spray deposit thermal.
  • the plasma torch projects the alloy coating at high speed and high (over 2500 ° K.) Onto the surface to be treated to obtain its adhesion.
  • Steps E1 are very abrasive and E2 steps are undesirable outside the surfaces to be treated. They require in the case of fin treatment, to interpose a protection between the sandblasting tools and / or the plasma torches and the surfaces 19 of the blades 10 so as to subtract the latter from their effects. More precisely, only the surfaces 17 of the ends of fins 15 intended to be brought into contact with those 17 of the other fins of the neighboring blades, are subject, during manufacture, to the surface treatments above. In addition, the two faces 19 of the blade 11 have helical surfaces of very precise geometry which must be protected.
  • the only 18 contact surfaces, located on either side of the foot of the blade 10 are to be coated.
  • the other zones 12 and 13 of the foot must be protected at least during the treatment E2.
  • the operators of these operations are subject to nervous tensions due in particular to the sustained attention necessary for their execution; they are also exposed to the risk of musculoskeletal disorders (MSDs) following repetitive actions.
  • MSDs musculoskeletal disorders
  • a protective mask according to the preamble of claim 1 is described in the document US 5792267 .
  • the Applicant proposes a protective mask for the surface treatment of surfaces of a turbomachine blade according to claim 1.
  • the surface treatment comprises a sanding step and / or a metallization step.
  • Tooling means a part or a set of at least partly rigid parts whose shape and materials are suitable for masking portions of surfaces to be protected. Tooling materials are also able to withstand the operating environment of operations E1 and E2. Thanks to the tooling of the invention, it eliminates any manual application of adhesive tape, and the masking is perfectly repetitive.
  • the protective mask is arranged to withstand the thermal effects of surface treatment, here a plasma deposit.
  • the protective mask of step E1 is a material resistant to the abrasive action of sandblasting.
  • the protective mask is made of stainless steel or of silicone material or of polymer material.
  • the mask can be used for both sandblasting and plasma deposition, and can be reused for a series of turbomachine blades.
  • FIG. 2 represents the lower part of a compressor blade whose blade 11, the platform 14 and the foot 13 are seen. It is here in the form of a dovetail and rectilinear (non-exhaustive case, quoted as example).
  • a 13R coating is applied located in the areas which are in contact with the sidewalls of the cell.
  • a mask 100 is provided, which matches the shape of the blade blade in part, and can be set up simply by embedding.
  • the mask 100 advantageously made of stainless steel, has a determined thickness.
  • a window 100R is formed in this mask, on each side of the foot. The shape and dimensions of the windows depend on those of the 13R coating that is to be applied by the plasma torch.
  • This coating 13R is located on both surfaces of the pile. who will be in contact with the disk on the turbomachine.
  • the plasma torch T is preferably placed perpendicularly to the surface to be treated.
  • the walls of the window are perpendicular to this surface.
  • the window allows the passage of the molten metal particles during the metallization operation with the plasma torch.
  • This arrangement has the advantage that the molten metal particles from the plasma torch that are not directed the axis of the window are deposited on the mask in the area bordering the window 100R without being reflected inwards. These particles do not come to disturb the layer in formation by rebound. After a layer of the desired thickness, the mask is removed.
  • the coating 13R has exactly the shape defined by that of the window, it is not necessary to carry out a retouching operation.
  • the mask is put back into service for the treatment of other blades if the metallized zone at the edge of the window is not too thick.
  • the mask can thus be used several times before requiring a reformation by "demetallization" of the area bordering the window.
  • Such a mask restoration operation is advantageously carried out chemically according to the techniques known to those skilled in the art.
  • the same mask is used to protect the surfaces that should not be sandblasted.
  • Such a mask also has the advantage of allowing the treatment of several blades at the same time.
  • a groove 110 in the bottom wall of the mask to allow then to apply an alignment bar 43.
  • FIG. 3 There is shown in Figure 3 a mounting for the treatment of some blades.
  • the blades equipped with their protective mask 100 are assembled on a single tool 40.
  • the tool 40 comprises a frame 42 on which the blades have been fixed, paddle downwards, so as to present the masks on the top. 100R windows are visible.
  • a bar 43 connects the masks 100 by the grooves 110. With this bar can align the masks precisely relative to each other.
  • Flanges 41 are placed along the row of masks so as to cover and protect the platforms of the blades.
  • FIGS. 4A and 4B show a masking device adapted to blades whose foot is curvilinear, such as blades of a size blower.
  • a mask 100 'of protection comprising, fixed on a base 132, a frame 125 of silicone material or polymeric material arranged to be mounted by fitting the foot 13 of the blade 11 while leaving, through lights 124, the surfaces 18 to be treated.
  • the frame comprises two half-shells 121 matching the shapes of the surface above, made according to the same plans that allowed the realization.
  • These two half-shells 121 are assembled by detachable locks 123, for example fitting themselves in the two half-shells 121, and can therefore be disassembled to remain fit for a new assembly and remain available for processing. another dawn.
  • a mask 100 "'of protection comprising, fixed on a base 132", four supports 127 arranged for to be able to support two spacers 126, all in stainless steel, now payroll 11 and two masks 128, stainless steel, now and covering the foot 13 of the blade 11, on either side of the foot, while letting appear, through lights 131 surfaces 18 to be treated.
  • the periphery of the lights 131 is lined with tabs 129 limiting this extent at will.
  • the position of the tabs 129 is slidably adjustable on the masks 128 and is held there by clamping screws 130.
  • the tabs 129 only limit the length of the lights 131 but the same device is also possible in width, the two devices can easily be simultaneously.
  • the mask is made of silicone material. This material is both resistant to sanding mechanics and to the metallization heat treatment.
  • the present invention is not limited to the embodiments shown.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (7)

  1. Schutzabdeckung für die Oberflächenbehandlung einer Tufbomaschinenschaufel (10), die einen Fuß mit zu behandelnden Oberflächen (18) aufweist, wobei diese Abdeckung auf dem Fuß um die genannten Oberflächen (18) herum angeordnet wird und aus einem Werkstoff besteht, der den Auswirkungen der Oberflächenbehandlung standhält und dabei ein abnehmbares und wieder verwendbares Werkzeug darstellt, das sich aus mindestens einem Stück (100, 100', 100", 239) zusammensetzt, das die Form des Fußes annimmt und eine bestimmte Dicke aufweist,
    dadurch gekennzeichnet,
    dass dieses Stück Öffnungen aufweist, durch die die zu behandelnden Oberflächen (18) sichtbar sind und deren Form auf die zu behandelnden Oberflächen passt, und zwar mit Wänden, die senkrecht zu diesen stehen, so dass das Absetzen von Partikeln, die sich nicht auf der Achse der Öffnungen befinden, gewährleistet ist, ohne dass diese auf die genannten zu behandelnden Oberflächen reflektiert werden.
  2. Abdeckung nach Anspruch 1, die mindestens zwei Halbschalen (121, 233) umfasst, die durch Riegel oder Klemmen (123, 236) zusammengehalten werden.
  3. Abdeckung nach einem der Ansprüche 1 bis 2, die aus einem Werkstoff besteht, der den thermischen Einwirkungen einer Plasmabeschichtung standhält,
  4. Abdeckung nach einem der Ansprüche 1 bis 3, die aus einem Werkstoff besteht, der den mechanischen Einwirkungen einer Bearbeitung durch Sandstrahlen standhält.
  5. Abdeckung nach einem der Ansprüche 1, 3 und 4, die aus rostfreiem Stahl besteht.
  6. Abdeckung nach Anspruch 5, die durch einfaches Einpassen angebracht werden kann.
  7. Abdeckung nach einem der Ansprüche 1 bis 4, die aus einem Silikon- oder Polymerwerkstoff besteht.
EP04300818A 2003-12-04 2004-11-26 Abdeckung zum Schutz von Turbomaschinenschaufeln bei Oberflächenbehandlung Expired - Fee Related EP1537950B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07113930A EP1911549B1 (de) 2003-12-04 2004-11-26 Schutzmaske für die Oberflächenbehandlung von Strömungsmaschinen-Leitschaufeln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314256A FR2863191B1 (fr) 2003-12-04 2003-12-04 Masque de protection pour le traitement de surface d'aubes de turbomachines
FR0314256 2003-12-04

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07113930A Division EP1911549B1 (de) 2003-12-04 2004-11-26 Schutzmaske für die Oberflächenbehandlung von Strömungsmaschinen-Leitschaufeln

Publications (2)

Publication Number Publication Date
EP1537950A1 EP1537950A1 (de) 2005-06-08
EP1537950B1 true EP1537950B1 (de) 2007-08-08

Family

ID=34451723

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07113930A Active EP1911549B1 (de) 2003-12-04 2004-11-26 Schutzmaske für die Oberflächenbehandlung von Strömungsmaschinen-Leitschaufeln
EP04300818A Expired - Fee Related EP1537950B1 (de) 2003-12-04 2004-11-26 Abdeckung zum Schutz von Turbomaschinenschaufeln bei Oberflächenbehandlung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07113930A Active EP1911549B1 (de) 2003-12-04 2004-11-26 Schutzmaske für die Oberflächenbehandlung von Strömungsmaschinen-Leitschaufeln

Country Status (10)

Country Link
US (1) US7066799B2 (de)
EP (2) EP1911549B1 (de)
CN (1) CN100569988C (de)
DE (2) DE602004008015T2 (de)
ES (2) ES2336499T3 (de)
FR (1) FR2863191B1 (de)
MX (1) MXPA04012145A (de)
NO (1) NO336270B1 (de)
RU (1) RU2369443C2 (de)
TW (1) TWI331184B (de)

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Also Published As

Publication number Publication date
EP1911549B1 (de) 2010-01-06
MXPA04012145A (es) 2005-09-21
EP1537950A1 (de) 2005-06-08
ES2291837T3 (es) 2008-03-01
RU2004135414A (ru) 2006-05-10
NO20045322L (no) 2005-06-06
TW200530488A (en) 2005-09-16
EP1911549A1 (de) 2008-04-16
FR2863191A1 (fr) 2005-06-10
FR2863191B1 (fr) 2007-04-20
DE602004008015D1 (de) 2007-09-20
ES2336499T3 (es) 2010-04-13
RU2369443C2 (ru) 2009-10-10
CN1626696A (zh) 2005-06-15
NO336270B1 (no) 2015-07-06
US7066799B2 (en) 2006-06-27
DE602004025058D1 (de) 2010-02-25
DE602004008015T2 (de) 2008-04-24
CN100569988C (zh) 2009-12-16
TWI331184B (en) 2010-10-01
US20050227589A1 (en) 2005-10-13

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