EP0436421A1 - Verfahren zum Entfernen einer Schicht auf Stücken durch die Projektion eines Hochdruckwasserstrahles - Google Patents
Verfahren zum Entfernen einer Schicht auf Stücken durch die Projektion eines Hochdruckwasserstrahles Download PDFInfo
- Publication number
- EP0436421A1 EP0436421A1 EP19900403664 EP90403664A EP0436421A1 EP 0436421 A1 EP0436421 A1 EP 0436421A1 EP 19900403664 EP19900403664 EP 19900403664 EP 90403664 A EP90403664 A EP 90403664A EP 0436421 A1 EP0436421 A1 EP 0436421A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- treated
- speed
- removal
- jet
- 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.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 241001080024 Telles Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910000601 superalloy Inorganic materials 0.000 description 3
- 229910002061 Ni-Cr-Al alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 229910018138 Al-Y Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000016571 aggressive behavior Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
Definitions
- the present invention relates to a process for removing coatings from mechanical parts, in particular during the repackaging of aeronautical parts, in particular intended for aeronautical engines, comprising the use of a jet of water under high pressure, with or without the addition of 'additives or particles, possibly abrasive.
- the object of the invention is to provide a process for removing coatings from mechanical parts which meet the imposed quality criteria which are frequently severe for the acceptance of parts intended for aeronautical engines which constitute a particular application directly targeted by the invention. .
- the method according to the invention by adapting means, some of which are already known for other uses, makes it possible to combine numerous technical and economic advantages without incurring the drawbacks encountered in the implementation of the prior methods used for removal of coatings on mechanical parts.
- the installation 1 schematically represented in FIG. 1 and used for implementing the coating removal process on mechanical parts according to the invention comprises for example several work stations each comprising a workpiece support such as a table 2 or a fixed position 3 or any type of positioner suitable for the parts and the areas to be treated and associated displacement means carrying at least one projection head 4.
- These displacement means 5 associated with the table 2 can for example allow crossed movements or they can be constituted by a robot 6.
- Said work stations are connected by a set of pipes and valves, symbolized at 7, to a set of power supply 8 including in particular a system of pumping 9 and distributing 10 water under high pressure p.
- Each workstation is completed by a device for recovering the fluid jet, which it also provides for amortization after its action on the part to be treated. This device consists for example of a layer up to 1 m thick consisting of a stack of pebbles leading to fine sand.
- a control cabinet 11 completes the installation.
- a part 12 is for example placed on said table 2 on which it is fixed by any known means.
- the area of the part 12 to be treated is placed at a distance d, generally less than 200 mm from the outlet orifice of said projection head 4.
- Said projection head 4 orientably mounted on the displacement means 5 comprises, as shown in FIG. 2 in detail, a nozzle 4a provided with a calibrating element of the water jet which is for example made of sapphire and has a passage opening chosen according to each particular application and which is, for example, 0.25 mm, 0.35 mm, 0.4 mm or 0.5 mm.
- the spray head 4 also includes a high pressure water inlet 4b, a supply 4c of possible additional particles, a chamber 4d with a venturi effect and a nozzle 4e for guiding the jet.
- the second step (b) of said method consists in projecting onto said zone of the part 12 to be treated a jet of water under high pressure by means of said head 4, the adapted displacements making it possible to cover the entirety of said zone to be treated.
- the high water pressure is adjusted to a value p greater than 108 Pa.
- the speed v of the displacements is set between 0.025 m / min and 7 m / min.
- the value of the parameters noted above is determined so as to obtain the complete removal of the coating while preserving the absence of attack at the level of the part surface forming the substrate of said coating.
- the maximum speed of 7 m / min indicated above can in particular be increased depending on the capacities of the means used and the adaptation of the other parameters to particular applications.
- a minimum speed limit can be determined depending on the type of coating to be removed. Thus for a deposit of thick and aged tungsten carbide, this limit can go down to 0.025 m / min.
- additives can be added to the fluid jet sprayed with pure water, under high pressure.
- Polymers are thus used which modify the physical properties of water, in particular wetting or surface tension, which makes it possible to act on the characteristics of the jet obtained, its shape, its compactness, its propensity for divergence, the characteristics impact with the material, for example.
- particles can be added to the projected fluid so as to modify the mechanical action of the jet on the material.
- a high pressure water jet in accordance with the invention, makes it possible to use more tender projectiles, balls plastic, or on the contrary abrasive grains of garnet, to activate the surface for a new deposit, for example.
- the characteristics of the sprayed fluid are determined following tests, in particular the nature, morphology and quantity of the particles added to the water under high pressure. The same projection head allows these operations to be carried out successively if necessary.
- FIG. 3 shows diagrammatically an example of a projection head 4 equipped with a nozzle, of which FIG. 4 shows a particular example of embodiment of the section 4f for calibrating the jet.
- FIG. 5 shows diagrammatically a solution in which the projection head 4 combines several nozzles, which makes it possible to increase the yield.
- FIG. 6 schematically shows an application in which several projection heads 4 with a single nozzle are associated allowing overlapping jets.
- the angle of incidence of the jet can also be adjusted either according to a particular relief of the part. either to improve the yield or to modify a degree of selective aggression on the coating.
- the types of coatings removed include deposits obtained by spraying on the arc plasma or oxyacetylene flame and various deposits obtained electrolytically, chemically or electrochemically.
- the removal can take place during touch-ups or recoveries on new parts during manufacture or during the repair of degraded parts in operation.
- An important advantage of the water jet removal process according to the invention and which has just been described is to allow reconditioning of the treated surface for a new deposition without requiring an additional cycle of surface preparation before coating.
- the method according to the invention makes it possible to eliminate an external layer 13 without altering the base layer 14 adhering to the substrate 15, as schematically represented in the figure. 7. This result is made possible by a judicious choice of parameters.
- FIG. 8 a reduction in nuisance can be obtained, in particular noise by applying the method according to the invention in a configuration of submerged jet such as an exemplary embodiment is shown diagrammatically in FIG. 8.
- the fluid jet 16 for the part 12 is immersed in a surrounding liquid mass 17.
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Coating By Spraying Or Casting (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8916871A FR2655887B1 (fr) | 1989-12-20 | 1989-12-20 | Procede d'enlevement d'un revetement sur pieces par projection d'un jet d'eau sous haute tension. |
| FR8916871 | 1989-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0436421A1 true EP0436421A1 (de) | 1991-07-10 |
| EP0436421B1 EP0436421B1 (de) | 1994-05-04 |
Family
ID=9388743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900403664 Expired - Lifetime EP0436421B1 (de) | 1989-12-20 | 1990-12-19 | Verfahren zum Entfernen einer Schicht auf Stücken durch die Projektion eines Hochdruckwasserstrahles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0436421B1 (de) |
| JP (1) | JPH04210279A (de) |
| CA (1) | CA2032218A1 (de) |
| DE (1) | DE69008695T2 (de) |
| FR (1) | FR2655887B1 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995020434A1 (en) * | 1994-01-27 | 1995-08-03 | Engelhard Corporation | Process for recovering catalyst supports |
| WO1998039107A1 (de) * | 1997-03-06 | 1998-09-11 | Maveg Gmbh | Verfahren und vorrichtung zum abtragen einer am kunststoffkörper einer digitalen speicherplatte haftenden beschichtung |
| WO1999019087A1 (en) * | 1997-10-10 | 1999-04-22 | Norsk Hydro Asa | Process for removing a plastic coating from metal products |
| WO2000029187A1 (de) * | 1998-11-12 | 2000-05-25 | Manfred Detterbeck | Verfahren und vorrichtung zum reinigen von kunststoff-bauteilen |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06278027A (ja) * | 1992-12-08 | 1994-10-04 | Flow Internatl Corp | 超高圧ファンジェットによる硬質被膜除去法 |
| DE19549628B4 (de) * | 1995-05-26 | 2006-08-17 | Ryoden Semiconductor System Engineering Corp., Itami | Waschverfahren eines Halbleitersubstrats |
| JP3504023B2 (ja) * | 1995-05-26 | 2004-03-08 | 株式会社ルネサステクノロジ | 洗浄装置および洗浄方法 |
| DE69614627T2 (de) * | 1995-09-25 | 2001-12-06 | Eco-Snow Systems, Inc. | System und Verfahren zum Polieren von Weichmetallflächen mittels CO2-Schnee |
| DE10255213B4 (de) * | 2002-11-27 | 2006-01-26 | Daimlerchrysler Ag | Verfahren zur Vorbehandlung von Oberflächen für thermisch gespritzte Schichten |
| EP3969237A1 (de) * | 2019-06-28 | 2022-03-23 | Siemens Aktiengesellschaft | Verfahren zum entfernen einer keramischen beschichtung von einem substrat und wasserstrahlmaschine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192677A (en) * | 1961-11-13 | 1965-07-06 | Ajem Lab Inc | Abrasive impingement cleaning process |
| DE2900439A1 (de) * | 1979-01-08 | 1980-07-17 | Grensing Gmbh | Verfahren und vorrichtung zur entfernung von beim spritz-lackieren von z.b. automobil-karosserien an den boden-gitterrosten haften bleibenden lackresten |
| DE3141516A1 (de) * | 1981-10-20 | 1983-05-05 | Richard Buchen GmbH, 5000 Köln | Hochdruck-reinigungsvorrichtung fuer wasserdrucke von etwa 300 bis 500 bar und darueber |
| EP0114424A2 (de) * | 1983-01-24 | 1984-08-01 | COMAU S.p.A. | Vorrichtung zum Waschen von Werkstücken |
| DE3610379A1 (de) * | 1986-03-27 | 1987-10-01 | Helmuth Schmoock | Folie mit mindestens einer von einer metallschicht ueberdeckten oberflaeche sowie verfahren und vorrichtung zu ihrer herstellung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0218354B1 (de) * | 1985-09-09 | 1990-11-07 | Westinghouse Electric Corporation | Strahlverfestigung mit Hochdruckwasser |
| JPS62124900A (ja) * | 1985-11-22 | 1987-06-06 | 日石三菱株式会社 | 金属板表面被覆膜の切断・剥離方法及びその装置 |
| JPH01205976A (ja) * | 1988-02-12 | 1989-08-18 | Sumitomo Metal Ind Ltd | ガス混入高圧水による脱スケール法 |
-
1989
- 1989-12-20 FR FR8916871A patent/FR2655887B1/fr not_active Expired - Fee Related
-
1990
- 1990-12-13 CA CA 2032218 patent/CA2032218A1/fr not_active Abandoned
- 1990-12-19 EP EP19900403664 patent/EP0436421B1/de not_active Expired - Lifetime
- 1990-12-19 DE DE1990608695 patent/DE69008695T2/de not_active Expired - Fee Related
- 1990-12-20 JP JP41805290A patent/JPH04210279A/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192677A (en) * | 1961-11-13 | 1965-07-06 | Ajem Lab Inc | Abrasive impingement cleaning process |
| DE2900439A1 (de) * | 1979-01-08 | 1980-07-17 | Grensing Gmbh | Verfahren und vorrichtung zur entfernung von beim spritz-lackieren von z.b. automobil-karosserien an den boden-gitterrosten haften bleibenden lackresten |
| DE3141516A1 (de) * | 1981-10-20 | 1983-05-05 | Richard Buchen GmbH, 5000 Köln | Hochdruck-reinigungsvorrichtung fuer wasserdrucke von etwa 300 bis 500 bar und darueber |
| EP0114424A2 (de) * | 1983-01-24 | 1984-08-01 | COMAU S.p.A. | Vorrichtung zum Waschen von Werkstücken |
| DE3610379A1 (de) * | 1986-03-27 | 1987-10-01 | Helmuth Schmoock | Folie mit mindestens einer von einer metallschicht ueberdeckten oberflaeche sowie verfahren und vorrichtung zu ihrer herstellung |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995020434A1 (en) * | 1994-01-27 | 1995-08-03 | Engelhard Corporation | Process for recovering catalyst supports |
| US5820693A (en) * | 1994-01-27 | 1998-10-13 | Patchett; Joseph A. | Process for recovering catalysts supports |
| WO1998039107A1 (de) * | 1997-03-06 | 1998-09-11 | Maveg Gmbh | Verfahren und vorrichtung zum abtragen einer am kunststoffkörper einer digitalen speicherplatte haftenden beschichtung |
| WO1999019087A1 (en) * | 1997-10-10 | 1999-04-22 | Norsk Hydro Asa | Process for removing a plastic coating from metal products |
| WO2000029187A1 (de) * | 1998-11-12 | 2000-05-25 | Manfred Detterbeck | Verfahren und vorrichtung zum reinigen von kunststoff-bauteilen |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69008695D1 (de) | 1994-06-09 |
| JPH04210279A (ja) | 1992-07-31 |
| FR2655887B1 (fr) | 1992-03-06 |
| CA2032218A1 (fr) | 1991-06-21 |
| EP0436421B1 (de) | 1994-05-04 |
| DE69008695T2 (de) | 1994-09-08 |
| FR2655887A1 (fr) | 1991-06-21 |
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