CN113502446A - Quick-turnover and quick-change type spraying protection clamp and spraying method - Google Patents
Quick-turnover and quick-change type spraying protection clamp and spraying method Download PDFInfo
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- CN113502446A CN113502446A CN202110586874.XA CN202110586874A CN113502446A CN 113502446 A CN113502446 A CN 113502446A CN 202110586874 A CN202110586874 A CN 202110586874A CN 113502446 A CN113502446 A CN 113502446A
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- 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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- 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
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- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Clamps And Clips (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a spraying protection clamp capable of being quickly turned and quickly replaced and a spraying method, wherein the spraying protection clamp comprises the following steps: the moving device is used for clamping the assembly and exposing the spraying area of the assembly, and the fixing device is used for installing and positioning the moving device so as to realize integral spraying on the assembly; the moving device is convenient for carrying out integral sand blowing and coarsening treatment on the spraying area; the moving device is matched with the fixing device in an installing way and drives the assembly part to be integrally turned over so as to ensure the uniformity of the thickness of the coating in the spraying area; the fixing device is arranged on a rotary table of the spraying device. According to the spray protection fixture with rapid turnover and quick change, disclosed by the invention, the stripping type clamping and rapid change concept is introduced on the basis of the protection of the existing fixture, the processing time is shortened from 2-3 hours to 30-60 minutes, the working time is obviously shortened, the processing efficiency is improved, the processing cost is reduced, and greater economic benefits can be brought.
Description
Technical Field
The invention relates to the field of clamps, in particular to a spraying protection clamp capable of being quickly turned over and quickly replaced. In addition, the invention also relates to a spraying method of the spraying protection clamp which comprises the quick-turnover and quick-change type spraying protection clamp.
Background
The first-stage outer ring of the gas turbine of a certain aircraft engine is a gas turbine outer ring assembly with a split structure, the process requires that the inner circular ring area surface of the gas turbine outer ring assembly is sprayed and other parts are protected, for example, the upper end surface and the lower end surface of the gas turbine outer ring assembly generally need to be cut into a plurality of sections to form a plurality of arc-shaped sections, as shown in fig. 1, then the spraying is carried out, each arc-shaped section is independently sprayed to form a coating, and the total thickness of the coating after the spraying is required to be more than 1.3 mm.
The existing spraying process has the following defects: (1) when the common spray gun is adopted for spraying the gas turbine outer ring component, the spray gun and the gas turbine outer ring component have a certain oblique angle, so that in order to ensure the uniformity of the coating thickness, the gas turbine outer ring component needs to be turned over for many times in the spraying process. However, when the outer ring assembly of the gas turbine is turned over, the clamp needs to be disassembled firstly, the arc-shaped sections are taken out one by one, and then the arc-shaped sections are installed reversely in sequence, so that the possibility of coating pollution in the spraying process is increased due to the fact that the arc-shaped sections are contacted with operators and tools for many times in the whole process, and the process is complicated and time-consuming. (2) The coating on the spraying surface of the gas turbine outer ring assembly is thick, the spraying times are more, the coating is accumulated on the periphery of the tool and the gas turbine outer ring assembly, the coating at the lower end of the clamp is accumulated, the spraying surface is influenced, the machine cleaning and maintenance are required to be repeatedly carried out, and the service life of the clamp is influenced; the coating of the transition area of the outer ring component of the gas turbine is too high and too thick, so that the workload for cleaning the outer ring component of the gas turbine is increased, and the edge is easy to break in the polishing process. (3) The gas turbine outer ring assembly requires multiple measurements during the machining process to control the size of the base and face layers. The wall thickness is measured by using a universal caliper, so that the outer ring component of the gas turbine is decomposed into arc-shaped sections for many times in the spraying process to measure the wall thickness. (4) For gas turbine outer ring assemblies with different upper and lower end surface structures, when the same type of gas turbine outer ring assemblies are sprayed in a turning mode, 2 sets of clamps corresponding to the end surfaces of the gas turbine outer ring assemblies are needed, and machining cost is increased. (5) The coarsening sand blowing process before spraying generally adopts manual sand blowing, sand blowing is carried out on a single arc-shaped section, the clamping difficulty is high, the process occupies the working time of equipment, the labor capacity is large, and the risk of pollution of a surface to be sprayed is increased.
Disclosure of Invention
The invention provides a quick-turnover and quick-change type spraying protection clamp and a spraying method, and aims to solve the technical problems that the existing spraying protection clamp has different shapes of upper and lower end surfaces of a part to be sprayed, has few supporting points and high positioning difficulty, and has large thickness of a local spraying layer of the part due to the existing process method and the structure of the part, so that the coating adhered to the spraying protection clamp is more and is difficult to remove.
The technical scheme adopted by the invention is as follows:
the utility model provides a spraying protection anchor clamps that turn over fast and quick change formula for the gas turbine outer loop subassembly of clamping and protection valving structure makes gas turbine outer loop subassembly install on spraying device's revolving stage, and gas turbine outer loop subassembly comprises multistage arcuation section, and the combination constitutes the sub-assembly along circumference is assembled to multistage arcuation section, and the interior anchor ring of sub-assembly is the spraying region, includes: the moving device is used for clamping the assembly and exposing the spraying area of the assembly, and the fixing device is used for installing and positioning the moving device so as to realize integral spraying on the assembly; the moving device is convenient for carrying out integral sand blowing and coarsening treatment on the spraying area; the moving device is matched with the fixing device in an installing way and drives the assembly part to be integrally turned over so as to ensure the uniformity of the thickness of the coating in the spraying area; the fixing device is arranged on a rotary table of the spraying device.
Further, the mobile device includes: the upper ring pressing plate is used for being matched with the upper end face of the assembly and protecting the upper end face, a first assembling mechanism used for being installed on the fixing device to achieve spraying and positioning of the assembly is arranged on the upper ring pressing plate, a lower ring pressing plate used for being matched with the lower end face and the outer ring face of the assembly and protecting the lower end face and the outer ring face is arranged on the upper ring pressing plate, a second assembling mechanism used for being installed on the fixing device to achieve spraying and positioning of the assembly is arranged on the lower ring pressing plate, a first connecting piece used for connecting the upper ring pressing plate and the lower ring pressing plate and guaranteeing fastening and clamping of the assembly is arranged on the upper ring pressing plate and the lower ring pressing plate, the assembly is installed between the upper ring pressing plate and the lower ring pressing plate in a clamping mode, and a spraying area of the assembly is located on one side of the inner ring of the upper ring pressing plate and the inner ring pressing plate of the lower ring pressing plate.
Furthermore, a measuring window used for measuring the thickness dimension of the coating by a measuring tool is arranged on one side of the upper annular pressure plate, which is close to the spraying area; and/or one side of the lower annular pressure plate close to the spraying area is provided with a measuring window for measuring the thickness dimension of the coating by the measuring tool.
Furthermore, the inner annular surface of the upper annular pressure plate adopts an inclined surface with the radial size gradually increasing from bottom to top so as to prevent the coating from being accumulated in the upper annular pressure plate and the spraying area; the inner ring surface of the lower circular pressing plate adopts an inclined surface with the radial size gradually reduced from bottom to top so as to prevent the coating from being accumulated in the lower circular pressing plate and the spraying area.
Further, the fixing device comprises a base for supporting the moving device and avoiding coating accumulation, a fitting part for being matched with the first assembling mechanism or the second assembling mechanism to mount and position the moving device on the base, and a second connecting part for mounting and fixing the base on the clamping jaw of the rotary table.
Further, the base includes the ring body, and ring body outer wall constitutes along radially extending and leans on the lug, and it is equipped with three at least groups to lean on the lug, and three at least groups lean on the lug to arrange along the equidistant interval of circumference of ring body, and the assembly part is laid and is leaned on the end of encorbelmenting of lug, and the second connecting piece adopts the bush, the one end and the ring body interference fit of bush, and the other end of bush adopts the protruding structure in ring body surface to the jack catch snatchs.
Furthermore, the ring body is provided with a fastening screw for positioning and clamping with the bushing.
Further, a protective sleeve for preventing the coating from being polluted is arranged on the outer surface of the first connecting piece; and the upper circular ring pressure plate and/or the lower circular ring pressure plate are/is provided with positioning convex grooves which are matched with the groove structures of the assembly to realize positioning.
According to another aspect of the present invention, there is also provided a spraying method using the fast-flipping and quick-changing spraying protection fixture, comprising the steps of:
protecting a non-spraying area of the assembly by adhering a protective film, assembling the assembly containing the protective film into a mobile device, exposing the spraying area, and performing integral sand blowing and coarsening on the spraying area;
fixing a fixing device on a rotary table of a spraying device, mounting a moving device containing a combined piece on the fixing device, and carrying out plasma spraying on the whole spraying area;
in the plasma spraying process, the moving device drives the assembly to turn over integrally to ensure the uniformity of the thickness of the coating in the spraying area, and the turning times are determined according to the thickness of the coating and the spraying times;
the measuring tool detects the thickness of the local coating through a measuring window on the mobile device until the required coating thickness is reached;
and after the plasma spraying is finished, taking down the moving device from the fixing device, and disassembling the moving device to obtain a sprayed assembly.
Further, the plasma spraying comprises the following specific steps: spraying a nickel-chromium-aluminum-yttrium coating on the spraying area to form a bottom layer, and spraying a zirconium oxide/yttrium oxide coating on the bottom layer to form a surface layer; the technological parameters of plasma spraying the bottom layer comprise: the spraying distance is 140 mm-160 mm, the current is 450A-550A, the main gas flow is 40 NLPM-45 NLPM, and the secondary gas flow is 8 NLPM-10 NLPM; the technological parameters of the plasma spraying surface layer comprise: the spraying distance is 60-80 mm, the current is 550-650A, the main gas flow is 40-45 NLPM, and the secondary gas flow is 8-10 NLPM; the protective film adopts a high-temperature resistant protective adhesive tape.
The invention has the following beneficial effects:
the invention relates to a spray protection fixture capable of being quickly turned over and quickly replaced. The quick-turnover and quick-change type spraying protection clamp introduces stripping type clamping and quick-change type concept on the basis of the existing clamp protection, the spraying protection clamp is stripped into two modules, one module is a fixed module formed by connecting a fixing device and a rotary table, the other module is a movable module formed by clamping a combined piece by a movable device, and the movable device is exposed out of a spraying area, so that the whole sand blowing and coarsening treatment can be conveniently carried out on the spraying area, the whole spraying area can be conveniently sprayed when the movable device is installed on the fixing device, and the whole turnover of the combined piece can be driven by the movable device, so that the coating thickness required by the spraying area can be reached, and the coating thickness can be kept uniform. The quick-turning and quick-changing type spraying protection clamp effectively ensures the uniformity of the quality of the coatings at the upper and lower parts of the assembly, reduces the cleaning workload of the residual coatings at the spraying edge of the subsequent assembly and improves the spraying efficiency. In addition, the spraying production mode of the quick-turning and quick-change type spraying protection clamp can realize the integral turning of the combined piece, the spraying protection clamp does not need to be disassembled, and the arc-shaped sections in the combined piece do not need to be taken out one by one and then reversely installed, so that the labor stress of operators is obviously reduced, and the processing efficiency is improved. Similarly, the moving device is convenient for carrying out whole sand blowing and coarsening treatment on the spraying area, and the whole sand blowing and coarsening treatment can ensure the uniformity of sand blowing and coarsening of the assembly. The quick-turnover and quick-change type spraying protection clamp is practically applied to spraying of the first-stage outer ring of the gas turbine, the processing time of each time can be shortened from 2-3 hours to 30-60 minutes, the working hours are obviously shortened, the processing efficiency is improved, the processing cost is reduced, and great economic benefits can be brought.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a view of the arc segment structure of the present invention;
FIG. 2 is a perspective view of a quick-flip and quick-change spray coating protection fixture in accordance with a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view of a quick-flip and quick-change spray coating protection fixture in accordance with a preferred embodiment of the present invention;
FIG. 4 is a top view of the base of the preferred embodiment of the present invention;
FIG. 5 is a top ring platen configuration of the preferred embodiment of the present invention;
FIG. 6 is a lower annular platen configuration of the preferred embodiment of the present invention;
FIG. 7 is a top view of the lower annular platen of the preferred embodiment of the present invention; and
fig. 8 is a B-B diagram of the preferred embodiment of the present invention.
The reference numbers illustrate:
1. a mobile device; 11. an upper circular ring pressing plate; 12. a first assembly mechanism; 13. a lower annular pressure plate; 14. a second assembly mechanism; 15. a first connecting member; 16. a measurement window;
2. a fixing device; 21. a base; 211. a ring body; 212. a bearing projection; 22. an assembly member; 23. a second connecting member.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a view of the arc segment structure of the present invention; FIG. 2 is a perspective view of a quick-flip and quick-change spray coating protection fixture in accordance with a preferred embodiment of the present invention; FIG. 3 is a cross-sectional view of a quick-flip and quick-change spray coating protection fixture in accordance with a preferred embodiment of the present invention; FIG. 4 is a top view of the base of the preferred embodiment of the present invention; FIG. 5 is a top ring platen configuration of the preferred embodiment of the present invention; FIG. 6 is a lower annular platen configuration of the preferred embodiment of the present invention; FIG. 7 is a top view of the lower annular platen of the preferred embodiment of the present invention; fig. 8 is a B-B diagram of the preferred embodiment of the present invention.
As shown in fig. 1 and fig. 2, the spray protection fixture with quick turning and quick changing of the present embodiment is used for clamping and protecting a gas turbine outer ring component with a split structure and enabling the gas turbine outer ring component to be installed on a turntable of a spraying device, the gas turbine outer ring component is composed of a plurality of arc-shaped sections, the plurality of arc-shaped sections are assembled and combined along a circumferential direction to form a combined member, an inner circular ring surface of the combined member is a spraying area, and the spray protection fixture comprises: the device comprises a moving device 1 for clamping the assembly and exposing a spraying area of the assembly, and a fixing device 2 for installing and positioning the moving device 1 so as to realize integral spraying on the assembly; the mobile device 1 is convenient for carrying out integral sand blowing and coarsening treatment on the spraying area; the moving device 1 is matched with the fixing device 2 in an installing way and drives the assembly part to be integrally turned over so as to ensure the uniformity of the thickness of the coating in the spraying area; the fixing device 2 is mounted on the turntable of the spraying device.
The invention relates to a spray protection fixture capable of being quickly turned over and quickly replaced. The quick-turnover and quick-change type spraying protection clamp introduces stripping type clamping and quick-change type concept on the basis of the existing clamp protection, the spraying protection clamp is stripped into two modules, one module is a fixed module formed by connecting a fixing device and a rotary table, the other module is a movable module formed by clamping a combined piece by a movable device, and the movable device is exposed out of a spraying area, so that the whole sand blowing and coarsening treatment can be conveniently carried out on the spraying area, the whole spraying area can be conveniently sprayed when the movable device is installed on the fixing device, and the whole turnover of the combined piece can be driven by the movable device, so that the coating thickness required by the spraying area can be reached, and the coating thickness can be kept uniform. The quick-turning and quick-changing type spraying protection clamp effectively ensures the uniformity of the quality of the coatings at the upper and lower parts of the assembly, reduces the cleaning workload of the residual coatings at the spraying edge of the subsequent assembly and improves the spraying efficiency. In addition, the spraying production mode of the quick-turning and quick-change type spraying protection clamp can realize the integral turning of the combined piece, the spraying protection clamp does not need to be disassembled, and the arc-shaped sections in the combined piece do not need to be taken out one by one and then reversely installed, so that the labor stress of operators is obviously reduced, and the processing efficiency is improved. Similarly, the moving device (1) is convenient for carrying out whole sand blowing and coarsening treatment on the spraying area, and the whole sand blowing and coarsening treatment can ensure the uniformity of sand blowing and coarsening of the assembly. The quick-turnover and quick-change type spraying protection clamp is practically applied to spraying of the first-stage outer ring of the gas turbine, the processing time of each time can be shortened from 2-3 hours to 30-60 minutes, the working hours are obviously shortened, the processing efficiency is improved, the processing cost is reduced, and great economic benefits can be brought.
As shown in fig. 2 and 3, in the present embodiment, the mobile device 1 includes: an upper annular pressing plate 11 used for being matched with the upper end face of the assembly and protecting the upper end face is arranged on the upper annular pressing plate 11, a first assembling mechanism 12 used for being installed on the fixing device 2 to achieve spraying and positioning of the assembly is arranged on the upper annular pressing plate 11, a lower annular pressing plate 13 used for being matched with the lower end face and the outer annular face of the assembly and protecting the lower end face and the outer annular face, a second assembling mechanism 14 used for being installed on the fixing device 2 to achieve spraying and positioning of the assembly is arranged on the lower annular pressing plate 13, a first connecting piece 15 used for connecting the upper annular pressing plate 11 and the lower annular pressing plate 13 and guaranteeing fastening and clamping of the assembly is arranged on the lower annular pressing plate 13, the assembly is clamped and installed between the upper annular pressing plate 11 and the lower annular pressing plate 13, and a spraying area of the assembly is located on one side of the inner annular pressing plate of the upper annular pressing plate 11 and the lower annular pressing plate 13. The moving device 1 comprises an upper annular pressing plate 11, a first assembling mechanism 12, a lower annular pressing plate 13, a second assembling mechanism 14 and a first connecting piece 15, wherein the upper annular pressing plate 11 and the lower annular pressing plate 13 are connected through the first connecting piece 15 and stably clamp the upper end surface, the lower end surface and the outer annular surface of the assembly, so that the assembly is quickly clamped and positioned to expose a spraying area and protect a non-spraying area. Preferably, the first connecting member 15 is a bolt and a nut, and is fastened by a pin. The combined part comprises a plurality of arc-shaped sections, when the combined part is assembled between the upper circular ring pressing plate 11 and the lower circular ring pressing plate 13, the arc-shaped sections are sequentially arranged in the lower circular ring pressing plate 13 at intervals along the circumferential direction of the lower circular ring pressing plate 13, the distance between every two adjacent arc-shaped sections is 3-5 mm, a protective film is adopted to protect a gap between every two adjacent arc-shaped sections so as to prevent the non-spraying area from being sprayed and polluting the moving device 1 in the spraying process, the coating overlapping is blocked, the coating overlapping is inconvenient for subsequent disassembly, the upper circular ring pressing plate 11 is covered on the combined part, and the upper circular ring pressing plate 11 and the lower circular ring pressing plate 13 are connected through the first connecting piece 15.
As shown in fig. 3, 7 and 8, in the present embodiment, a measuring window 16 for measuring the thickness of the coating layer by a gauge is provided on one side of the upper annular pressure plate 11 close to the spraying area; and/or one side of the lower annular pressure plate 13 close to the spraying area is provided with a measuring window 16 for measuring the thickness dimension of the coating by the measuring tool. The upper circular pressing plate 11 or the lower circular pressing plate 13 is provided with the measuring window 16, or the upper circular pressing plate 11 and the lower circular pressing plate 13 are both provided with the measuring window 16, so that the thickness of the coating can be measured by the measuring tool conveniently, the mobile device 1 does not need to be disassembled frequently, the processing period is shortened, and the pollution caused when the mobile device 1 is disassembled is reduced. When the upper annular pressing plate 11 and the lower annular pressing plate 13 are both provided with the measuring windows 16, the measuring windows 16 are symmetrically arranged on the upper and lower annular pressing plates 11 and 13, so that the upper and lower parts of the coating can be conveniently detected. The measurement window 16 may be a recessed structure that exposes the coating such that a wall thickness caliper is inserted into the recessed structure and the coating thickness can be measured directly. A plurality of groups of measuring windows 16 are arranged along the circumferential direction of the upper annular pressing plate 11, and a plurality of groups of measuring windows 16 are arranged along the circumferential direction of the lower annular pressing plate 13, so that the coating of the assembly at different positions can be measured, and the uniformity of the coating thickness of the assembly can be ensured.
As shown in fig. 5 and 6, in the present embodiment, the inner annular surface of the upper annular pressure plate 11 is a slope surface whose radial dimension gradually increases from bottom to top, so as to prevent the coating from accumulating in the upper annular pressure plate 11 and the spraying area. The inner annular surface of the lower annular pressure plate 13 adopts an inclined surface with the radial size gradually reduced from bottom to top so as to prevent the coating from being accumulated in the lower annular pressure plate 13 and the spraying area.
The interior anchor ring of going up ring clamp plate 11 and the interior anchor ring of lower ring clamp plate 13 all are equipped with the inclined plane above-mentioned, will be equipped with mobile device 1 of sub-assembly and install on fixing device 2 after, carry out plasma spraying, and the coating that splashes among the spraying process is sputtered the inclined plane and can be followed inclined plane roll-off and go up ring clamp plate 11 and lower ring clamp plate 13, can't pile up at last ring clamp plate 11, lower ring clamp plate 13 and spraying region. Therefore, the design of the inclined plane not only reduces the accumulation of the end face coating, but also avoids the overlap of the coating.
As shown in fig. 3 and 4, in the present embodiment, the fixing device 2 includes a base 21 for supporting the mobile device 1 and preventing the coating from being accumulated, a fitting 22 for cooperating with the first fitting mechanism 12 or the second fitting mechanism 14 to mount and position the mobile device 1 on the base 21, and a second connecting member 23 for mounting and fixing the base 21 on the turntable jaw. The first and second mounting mechanisms 12, 14 may employ threaded holes, and the mounting member 22 may employ bolts that engage the threaded holes. Stop screws for stabilizing the connection of the first assembly means 12 and the assembly member 22 and the connection of the second assembly means 14 and the assembly member 22 can also be provided.
As shown in fig. 4, in this embodiment, the base 21 includes a circular ring body 211, the outer wall of the circular ring body 211 extends along the radial direction to form supporting protrusions 212, at least three groups of the supporting protrusions 212 are provided, the supporting protrusions 212 of the at least three groups are arranged along the circumferential direction of the circular ring body 211 at equal intervals, the assembly parts 22 are arranged at the overhanging ends of the supporting protrusions 212, the second connecting part 23 is a bushing, one end of the bushing is in interference fit with the circular ring body 211, and the other end of the bushing is a protruding structure protruding from the surface of the circular ring body 211, so that the clamping claws can grab the assembly. Preferably, the second connector 23 is disposed in the middle of the circular ring body 211, or on the central axis of the circular ring body 211, so as to facilitate the attitude control of the assembly, and thus the precise process operation of the spraying area of the assembly.
The base 21 includes a circular ring body 211 and at least three sets of supporting bumps 212 radially extending along the circular ring body 211, and the assembly member 22 is disposed at the overhanging end of the supporting bumps 212, so that a suspension structure or a hollow structure is formed at the joint of the fixing device 2 and the mobile device 1. Because in the plasma spraying process, the coating in order to prevent splashing is piled up on base 21, consequently designs into suspended structure or hollow out construction, prevents that the coating from piling up and scrap (bridge), further guarantees the life of jack catch. The one end of above-mentioned bush and the interior becket interference fit of ring body 211 to through fastening screw location chucking, its other end is protruding structure, makes things convenient for the jack catch to snatch, and the bush is jack catch and base 21's adapting unit, has stand wear and tear, the characteristics of easy change. Preferably, above-mentioned lug 212 that leans on adopts three groups, furthest simplifies base 21 structure, alleviate base 21's weight, adopt three structures of group's lug 212, make fixing device 2 and mobile device 1 junction form unsettled structure or hollow out construction, avoid piling up of spraying coating, the coating is piled up, it is more difficult to clear up on the one hand, spraying protection anchor clamps and jack catch can be damaged to the clearance in-process, on the other hand, may form the bridge between the spraying protection anchor clamps, difficult spraying protection anchor clamps dismantlement scheduling problem, in addition, the coating has effectively been reduced to the pollution of revolving stage jack catch, the life of spraying protection anchor clamps and revolving stage jack catch has been improved.
Preferably, the ring body 211 is provided with a fastening screw for positioning and clamping with the bushing.
In this embodiment, the outer surface of the first connecting member 15 is provided with a protective sleeve for preventing the coating from being contaminated; the upper circular ring pressing plate 11 and/or the lower circular ring pressing plate 13 are/is provided with positioning convex grooves which are used for matching with the groove structures of the assembly to realize positioning. So as to realize the installation of the upper circular ring pressing plate 11 and the assembly and the installation of the lower circular ring pressing plate 13 and the assembly in place.
According to another aspect of the present invention, there is also provided a spraying method using the fast-flipping and quick-changing spraying protection fixture, comprising the steps of:
protecting a non-spraying area of the assembly by adhering a protective film, assembling the assembly containing the protective film into the mobile device 1, exposing the spraying area, and performing integral sand blowing and coarsening on the spraying area;
fixing a fixing device 2 on a rotary table of a spraying device, mounting a moving device 1 containing a combined piece on the fixing device 2, and carrying out plasma spraying on the whole spraying area;
in the plasma spraying process, the moving device 1 drives the assembly to turn over integrally to ensure the uniformity of the thickness of the coating in a spraying area, and the turning times are determined according to the thickness of the coating and the spraying times;
the measuring tool detects the thickness of the local coating through a measuring window 16 on the mobile device 1 until the required coating thickness is reached; after the plasma spraying is finished, the moving device 1 is removed from the fixing device 2, and the moving device 1 is disassembled to obtain a sprayed assembly.
The spraying method provided by the invention realizes the integral sand blowing coarsening and integral spraying of the gas turbine outer ring component with the segmented structure, improves the protection effect of the gas turbine outer ring component spraying, effectively ensures the uniformity of the coating thickness of the upper part and the lower part of a spraying area, effectively avoids the spraying dead angle, and improves the coating quality. In general, the coating is turned over once for 3-5 times, and the number of turns is determined according to the thickness of the coating.
In this embodiment, the plasma spraying specifically includes the steps of: spraying a nickel-chromium-aluminum-yttrium coating on the spraying area to form a bottom layer, and spraying a zirconium oxide/yttrium oxide coating on the bottom layer to form a surface layer; the technological parameters of plasma spraying the bottom layer comprise: the spraying distance is 140 mm-160 mm, the current is 450A-550A, the main gas flow is 40 NLPM-45 NLPM, and the secondary gas flow is 8 NLPM-10 NLPM; the technological parameters of the plasma spraying surface layer comprise: the spraying distance is 60-80 mm, the current is 550-650A, the main gas flow is 40-45 NLPM, and the secondary gas flow is 8-10 NLPM; the protective film adopts a high-temperature resistant protective adhesive tape.
Preferably, the spraying method comprises the following specific steps:
cutting a gas turbine outer ring component with a split structure into a plurality of arc sections, assembling and combining the arc sections along the circumferential direction to form an assembly, adopting a high-temperature-resistant protective adhesive tape, preferably CHR2925-07, for protecting a non-spraying area, assembling the assembly containing a protective film between an upper ring pressing plate 11 and a lower ring pressing plate 13 of a mobile device to protect the non-spraying area of the assembly and expose a spraying area, wherein the spraying area is positioned on one side of an inner ring of the upper ring pressing plate 11 and the inner ring side of the lower ring pressing plate 13, and connecting and fixing the upper ring pressing plate and the lower ring pressing plate by a first connecting piece 15;
carrying out integral sand blowing coarsening on the spraying area;
the base 21 of the fixing device 2 and the rotary table jaw are fixedly arranged through a second connecting piece 23 on the fixing device 2;
the second assembling mechanism 14 on the lower circular pressing plate 13 is in fit connection with the assembling part 22, so that the mobile device 1 assembled with the assembling part is installed on the supporting lug 212, and then plasma spraying is carried out on the spraying area of the assembling part, wherein the specific steps of the plasma spraying comprise: spraying a nickel-chromium-aluminum-yttrium (Amdry962) coating on a spraying area to form a bottom layer, spraying a zirconium oxide/yttrium oxide (Metco 204NS) coating on the bottom layer to form a surface layer, wherein the process parameters of plasma spraying the bottom layer comprise: the spraying distance is 150mm, the current is 500A, the main air flow is 42NLPM, and the secondary air flow is 9 NLPM; the technological parameters of the plasma spraying surface layer comprise: the spraying distance is 70mm, the current is 600A, the main air flow is 42NLPM, and the secondary air flow is 9 NLPM;
in the plasma spraying process, after 3 times of plasma spraying, the connection between the second assembling mechanism 14 and the assembling part 22 is disassembled, the moving device 1 drives the assembling part to turn over integrally, then the assembling part 22 is connected with the first assembling mechanism 11 on the upper annular pressing plate 11 in a matched manner, the spraying is continued, and the operation is repeated after 3 times of spraying until the plasma spraying is finished;
in the plasma spraying process, the thickness of the coating is measured by a wall thickness caliper through a measuring window 16 of the upper annular pressure plate 11 and a measuring window 16 of the lower annular pressure plate 13,
after plasma spraying is finished, the mobile device 1 is taken down from the fixing device 2, the first connecting piece 15 is disassembled, the upper circular ring pressing plate 11 is separated from the lower circular ring pressing plate 13, and a sprayed assembly is obtained.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fast-turning and quick-changing spraying protection fixture is used for clamping and protecting a gas turbine outer ring component with a split structure and enabling the gas turbine outer ring component to be installed on a rotary table of a spraying device, the gas turbine outer ring component is composed of a plurality of arc-shaped sections, the arc-shaped sections are assembled and combined along the circumferential direction to form a combined piece, the inner circle ring surface of the combined piece is a spraying area, and the fast-turning and quick-changing spraying protection fixture is characterized in that,
the method comprises the following steps: the device comprises a moving device (1) for clamping the assembly and exposing a spraying area of the assembly, and a fixing device (2) for installing and positioning the moving device (1) so as to realize integral spraying on the assembly;
the moving device (1) is convenient for carrying out integral sand blowing and coarsening treatment on the spraying area;
the moving device (1) is matched with the fixing device (2) in an installing way and drives the assembly piece to be turned over integrally so as to ensure the uniformity of the thickness of the coating in the spraying area;
the fixing device (2) is arranged on a rotary table of the spraying device.
2. The quick-flip and quick-change spray coating protection fixture of claim 1,
the mobile device (1) comprises:
an upper circular pressing plate (11) which is used for matching with and protecting the upper end surface of the assembly, a first assembling mechanism (12) which is used for being arranged on the fixing device (2) to realize the spraying and positioning of the assembly is arranged on the upper circular pressing plate (11),
a lower annular pressure plate (13) which is used for matching with the lower end surface and the outer annular surface of the assembly and protecting the lower end surface and the outer annular surface, a second assembling mechanism (14) which is used for being arranged on the fixing device (2) to realize the spraying and positioning of the assembly is arranged on the lower annular pressure plate (13),
a first connecting piece (15) for connecting the upper annular pressure plate (11) and the lower annular pressure plate (13) and ensuring the fastening and clamping of the assembly,
the assembly is clamped and installed between the upper circular ring pressing plate (11) and the lower circular ring pressing plate (13), and the spraying area of the assembly is located on one side of the inner circular ring of the upper circular ring pressing plate (11) and the inner circular ring of the lower circular ring pressing plate (13).
3. The quick-flip and quick-change spray coating protection fixture of claim 2,
one side of the upper annular pressure plate (11) close to the spraying area is provided with a measuring window (16) for measuring the thickness dimension of the coating by a measuring tool; and/or
And a measuring window (16) used for measuring the thickness of the coating by a measuring tool is arranged on one side of the lower annular pressure plate (13) close to the spraying area.
4. The quick-flip and quick-change spray coating protection fixture of claim 2,
the inner ring surface of the upper circular pressing plate (11) adopts an inclined surface with the radial size gradually increasing from bottom to top so as to prevent the coating from being accumulated on the upper circular pressing plate (11) and a spraying area;
the inner ring surface of the lower circular pressing plate (13) adopts an inclined surface with the radial size gradually reduced from bottom to top so as to prevent the coating from being accumulated in the lower circular pressing plate (13) and the spraying area.
5. The quick-flip and quick-change spray coating protection fixture of claim 2,
the fixing device (2) comprises a base (21) for supporting the mobile device (1) and avoiding coating accumulation, a fitting part (22) for matching with the first assembling mechanism (12) or the second assembling mechanism (14) to install and position the mobile device (1) on the base (21), and a second connecting part (23) for installing and fixing the base (21) on a rotary table jaw.
6. The quick-flip and quick-change spray coating protection fixture of claim 5,
the base (21) comprises a circular ring body (211), the outer wall of the circular ring body (211) extends along the radial direction to form supporting lugs (212), at least three groups of supporting lugs (212) are arranged, the supporting lugs (212) of the at least three groups are arranged along the circumferential direction of the circular ring body (211) at equal intervals, the assembling parts (22) are arranged at the overhanging ends of the supporting lugs (212),
the second connecting piece (23) adopts a bush, one end of the bush is in interference fit with the circular ring body (211), and the other end of the bush is protruded out of a protruding structure on the surface of the circular ring body (211) so that the clamping jaws can grab the bush.
7. The quick-flip and quick-change spray coating protection fixture of claim 6,
and a fastening screw for positioning and clamping with the bushing is arranged on the circular ring body (211).
8. The quick-flip and quick-change spray coating protection fixture of claim 2,
the outer surface of the first connecting piece (15) is provided with a protective sleeve for preventing the coating from being polluted;
and the upper circular ring pressing plate (11) and/or the lower circular ring pressing plate (13) are/is provided with positioning convex grooves which are used for being matched with the groove structures of the assembly to realize positioning.
9. A painting method using the quick-flip and quick-change painting protection jig of any one of claims 1 to 8, comprising the steps of:
protecting a non-spraying area of the assembly by adhering a protective film, assembling the assembly containing the protective film into the moving device (1), exposing the spraying area, and performing integral sand blowing and coarsening on the spraying area;
fixing a fixing device (2) on a rotary table of a spraying device, mounting a moving device (1) containing a combined piece on the fixing device (2), and carrying out plasma spraying on the whole spraying area;
in the plasma spraying process, the moving device (1) drives the assembly to turn over integrally to ensure the uniformity of the thickness of the coating in a spraying area, and the number of the turning over is determined according to the thickness of the coating and the number of spraying;
the measuring tool detects the thickness of the local coating through a measuring window (16) on the mobile device (1) until the required coating thickness is reached;
and after the plasma spraying is finished, removing the moving device (1) from the fixing device (2), and disassembling the moving device (1) to obtain a sprayed assembly.
10. The spraying method according to claim 9,
the plasma spraying comprises the following specific steps: spraying a nickel-chromium-aluminum-yttrium coating on a spraying area to form a bottom layer, and spraying a zirconium oxide/yttrium oxide coating on the bottom layer to form a surface layer;
the technological parameters of plasma spraying the bottom layer comprise: the spraying distance is 140 mm-160 mm, the current is 450A-550A, the main gas flow is 40 NLPM-45 NLPM, and the secondary gas flow is 8 NLPM-10 NLPM;
the technological parameters of the plasma spraying surface layer comprise: the spraying distance is 60-80 mm, the current is 550-650A, the main gas flow is 40-45 NLPM, and the secondary gas flow is 8-10 NLPM;
the protective film adopts a high-temperature resistant protective adhesive tape.
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| CN202110586874.XA CN113502446B (en) | 2021-05-27 | 2021-05-27 | Quick-turn and quick-change spraying protection clamp and spraying method |
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| CN202110586874.XA CN113502446B (en) | 2021-05-27 | 2021-05-27 | Quick-turn and quick-change spraying protection clamp and spraying method |
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| CN113502446B (en) | 2023-07-28 |
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