CN113981355B - Split outer ring assembly spraying clamp and method - Google Patents
Split outer ring assembly spraying clamp and method Download PDFInfo
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- CN113981355B CN113981355B CN202111107868.8A CN202111107868A CN113981355B CN 113981355 B CN113981355 B CN 113981355B CN 202111107868 A CN202111107868 A CN 202111107868A CN 113981355 B CN113981355 B CN 113981355B
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- outer ring
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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
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to the technical field of spraying of outer ring assemblies, in particular to a split outer ring assembly spraying clamp and a split outer ring assembly spraying method, wherein the split outer ring assembly spraying clamp comprises a clamp body and a base, and the clamp body is connected with the base; the clamp comprises a clamp body and is characterized in that the clamp body comprises a first compression element used for positioning and compressing, a plurality of clamping elements used for radially clamping from a circular ring and a second compression element used for axially compressing from the circular ring, wherein the first compression element, the clamping elements and the second compression element are of circular ring structures, the second compression element covers the first compression element and is detachably connected with the first compression element, and the clamping elements are detachably connected with the side part of the circular ring of the first compression element; the base is detachably connected with the first pressing element or the second pressing element respectively under different working states. The invention provides a spraying method of a split outer ring assembly, which can solve the problems of high protection and fixation difficulty, low spraying efficiency and poor uniformity of spraying thickness of the outer ring assembly in the processing process.
Description
Technical Field
The invention relates to the technical field of outer ring assembly spraying, in particular to a split outer ring assembly spraying clamp and a split outer ring assembly spraying method.
Background
The thermal spraying technology heats the spraying material by a certain heat source, and the heated material forms molten or semi-molten particles, and the particles impact and deposit on the surface of a substrate at a certain speed to form a spraying layer with certain characteristics, so that the thermal spraying technology is widely applied to the surface of aeroengine parts. Because of the requirement of the processing technology, the turbine outer ring assembly is usually processed in a split mode, in the use process, the inner surface of the outer ring assembly is required to be sprayed, in the prior art, the outer ring assembly is usually fixed, then the spray gun is moved back and forth to aim at the inner surface of the outer ring assembly to spray or the spray gun is directly fixed, and the outer ring assembly is clamped to move back and forth to spray. On one hand, because the single-section part of the outer ring assembly is small, the protection and fixing difficulties in the processing process are high; on the other hand, the spraying processing efficiency of the single-piece outer ring component is low; in addition, in the spraying process, the uniformity of the thickness of the surface coating of the outer ring component is poor, so that when the outer ring component is assembled into a whole ring later, the thickness and the height of the surface coating of the outer ring component are large, and further the performance in the subsequent use process is affected.
Chinese patent CN112846881a discloses a fixture and a machining method for machining arc surfaces of workpieces, wherein the fixture is mounted on a lathe, and the arc surfaces of a plurality of workpieces are machined simultaneously, so that the production efficiency is high. Clamping a plurality of workpieces simultaneously can improve machining efficiency, but turning and spraying processes are different, and the clamp can not solve the problem of poor uniformity of thickness of a surface coating.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a spraying method of a split outer ring assembly, which can solve the problems of high protection and fixation difficulty, low spraying efficiency and poor uniformity of spraying thickness of the outer ring assembly in the processing process.
In order to solve the technical problems, the invention adopts the following technical scheme:
the split outer ring assembly spraying clamp comprises a clamp body and a base, wherein the clamp body is connected with the base; the clamp comprises a clamp body and is characterized in that the clamp body comprises a first compression element used for positioning and compressing, a plurality of clamping elements used for radially clamping from a circular ring and a second compression element used for axially compressing from the circular ring, wherein the first compression element, the clamping elements and the second compression element are of circular ring structures, the second compression element covers the first compression element and is detachably connected with the first compression element, and the clamping elements are detachably connected with the side part of the circular ring of the first compression element; the base is detachably connected with the first pressing element or the second pressing element respectively under different working states.
The clamp body is used for clamping and fixing a plurality of outer ring assemblies at the same time, and the base is used for fixing the clamp body on the rotating shaft, so that the clamp body can drive the outer ring assemblies to rotate along with the base in the spraying process, each outer ring assembly can be sprayed, and the aim of uniform spraying can be fulfilled. The clamp body with the circular ring-shaped structure is arranged to meet the requirement of the shape of the outer ring assembly, so that a plurality of outer ring assemblies can be sequentially arranged along the circumferential direction of the clamp body in a relatively attached mode and are arranged on the first pressing element; the first pressing element is used for positioning the outer ring assembly from the bottom and the side, and the clamping element penetrates through the inner side of the outer ring assembly and passes through the first pressing element to fix the outer ring assembly in the radial direction of the circular ring; the second pressing element aligns and applies force from the top of the outer ring assembly to fix the outer ring assembly with the axis of the circular ring upwards; because the spray gun sprays obliquely from top to bottom, when the outer ring assembly is placed forward, the first pressing element is detachably connected with the base, and the second pressing element is placed upward; when the outer ring assembly is turned over by 180 degrees and then is turned upside down, the second pressing element is detachably connected with the base, and the first pressing element is placed upwards. The arrangement sequence of the first compression element or the second compression element is continuously adjusted in the spraying process, so that the outer ring assembly is continuously overturned, the purpose of uniform spraying is realized, and the problem that the thickness of the whole surface is uneven due to the fact that the coating is too thick at the upper part of the outer ring assembly and too thin at the lower part of the outer ring assembly is avoided; the first pressing element, the clamping element, the second pressing element and the base which are detachably connected can facilitate the installation and the disassembly of the outer ring assembly and continuously adjust the upper position and the lower position in the spraying process.
Preferably, the first pressing element comprises a supporting step and a positioning ring provided with a plurality of limiting holes, the positioning ring and the supporting step are of circular ring structures, the positioning ring is arranged on the supporting step, and the supporting step can be detachably connected with the base; the clamping elements are respectively penetrated through the limiting holes and detachably connected with the positioning ring; the second pressing element is abutted with the positioning ring and detachably connected with the supporting step.
Preferably, the inner diameter of the positioning ring is larger than the inner diameter of the supporting step, and the outer diameter of the positioning ring is smaller than the outer diameter of the supporting step.
Preferably, the clamping element comprises a screw and a nut, and the screw passes through the limiting hole from the inner side of the positioning ring and then is connected with the nut.
Preferably, the base comprises a plurality of connecting parts used for being connected with the clamp body and clamping parts used for connecting the base with the outside, and the connecting parts are uniformly distributed on the clamping parts and are connected with the outer side edges of the clamping parts; the connecting parts are connected with the supporting steps or the second pressing elements; the outer side edge of the clamping part is separated from the inner side edge of the supporting step or the inner side edge of the second pressing element by a distance on a horizontal projection plane.
The invention also provides a spraying method applying the split outer ring assembly spraying clamp, which comprises the following steps:
s1: cleaning the outer ring assembly;
s2: wrapping a protective layer in a non-spraying area of the outer ring assembly;
s3: carrying out sand blasting treatment on the outer ring assembly to coarsen the surface layer of the area to be sprayed on the workpiece;
s4: fixing a plurality of outer ring assemblies on a clamp body, and then fixing the clamp body on a base;
s5: rotating the base and simultaneously enabling the spray gun to move up and down for spraying;
s6: the clamp body is detached from the base and is fixed on the base again after being turned 180 degrees;
s7: rotating the base and simultaneously enabling the spray gun to move up and down for spraying;
s8: detecting whether the spraying is finished, if so, entering the next step, and if not, returning to the step S4;
s9: and removing the outer ring assembly from the clamp body and then cleaning after coating.
The invention is realized by
Further, in the step S5 and the step S7, the injection angle of the lance is 60 ° to 90 °, and the number of up-and-down movements of the lance is 2 to 4.
Further, in the step S5 and the step S7, the rotating speed of the base is 100-150 r/min and/or the spraying speed of the spray gun is 150-250 mm/S.
Further, in the step S5 and the step S7, the bottom layer spraying of the plasma nickel cobalt chromium aluminum yttrium tantalum is performed first, and then the surface layer spraying of the nickel chromium aluminum/silicon dioxide is performed.
Further, before step S4, the method further includes the following steps: detecting whether the protective layer of the non-spraying area of the outer ring assembly is damaged, wrapping the protective layer again in the area if the protective layer is damaged, and entering the next step if the protective layer is not damaged.
Compared with the prior art, the invention has the beneficial effects that:
(1) The plurality of outer ring assemblies are clamped and fixed by the clamp at the same time, on one hand, the clamp is attached to the outer ring assemblies by the circular structure of the clamp, and the protection and fixing effects of the outer ring assemblies are further improved; on the other hand, spraying of a plurality of outer ring assemblies can be realized in one spraying process, so that the working efficiency is greatly improved;
(2) The support steps or the second pressing elements on the two ends of the clamp body, namely the first pressing elements, can be detachably connected with the base, so that the clamp body can be turned over in the spraying process, the outer ring assembly is arranged in a positive and inverted mode alternately, the defect of uneven spraying caused by the fixed spraying angle of the spray gun is overcome, the outer ring assembly can keep uniform thickness in the vertical direction, and the consistency of the thickness of the coating is further improved.
Drawings
FIG. 1 is a schematic structural view of a split outer ring assembly spray fixture of the present invention;
FIG. 2 is a schematic view of a first compression element;
FIG. 3 is a schematic view of the structure of the base;
FIG. 4 is a schematic structural view of an outer ring assembly;
FIG. 5 is a view showing the state of use of the split outer ring assembly spray fixture of the present invention;
FIG. 6 is a flow chart of a split outer ring assembly spray method of the present invention.
The graphic indicia are illustrated as follows:
1. a clamp body; 11. a first pressing element; 111. a support step; 112. a positioning ring; 113. a limiting hole; 12. a clamping element; 121. a screw; 122. a nut; 13. a second pressing element; 2. a base; 21. a connection part; 22. a clamping part; 3. an outer ring assembly;
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Example 1
An embodiment of a split outer ring assembly spraying fixture of the invention is shown in fig. 1 to 5, and comprises a fixture body 1 and a base 2, wherein the fixture body 1 is connected with the base 2; the clamp body 1 comprises a first compression element 11 used for positioning and compressing, a plurality of clamping elements 12 used for radially clamping from a circular ring, and a second compression element 13 used for compressing from the axial direction of the circular ring, wherein the first compression element 11, the clamping elements 12 and the second compression element 13 are all of circular ring structures, the second compression element 13 covers the first compression element 11 and is detachably connected with the first compression element 11, and the clamping elements 12 are detachably connected with the side part of the circular ring of the first compression element 11; the base 2 is detachably connected to the first pressing element 11 or the second pressing element 13 in different operating states.
As an embodiment of the present invention, the first pressing element 11 includes a supporting step 111, and a positioning ring 112 provided with a plurality of limiting holes 113, wherein the positioning ring 112 and the supporting step 111 are both in a circular structure, the positioning ring 112 is mounted on the supporting step 111, and the supporting step 111 is detachably connected with the base 2; the clamping elements 12 are respectively penetrated through the limiting holes 113 and detachably connected with the positioning ring 112; the second pressing element 13 abuts against the positioning ring 112 and is detachably connected with the support step 111.
The support step 111 is used for supporting the bottom of the outer ring assembly 3 on the one hand and is used for being matched with the second pressing element 13 on the other hand so as to clamp the outer ring assembly 3 in the vertical direction together; the positioning ring 112 is used for limiting the side of the split outer ring assembly 3, in particular by fitting the outer surface of the outer ring assembly 3 with the inner surface of the positioning ring 112 and then fixedly clamping by the clamping element 12. The limiting hole 113 plays a role in limiting the clamping element 12, so that the clamping element 12 can pass through the outer ring assembly 3 and then pass through the limiting hole 113 to be connected with the positioning ring 112.
As one embodiment of the present invention, the inner diameter of the positioning ring 112 is larger than the inner diameter of the supporting step 111, and the outer diameter of the positioning ring 112 is smaller than the outer diameter of the supporting step 111.
The positioning ring 112 is mounted on the supporting step 111, the inner diameter of the positioning ring 112 is larger than the inner diameter of the supporting step 111, so that a part of the supporting step 111 is positioned at the inner side of the positioning ring 112, and the supporting step 111 of the part can provide support for the outer ring assembly 3; the outer diameter of the positioning ring 112 is smaller than that of the supporting step 111, so that a part of the supporting step 111 is positioned outside the positioning ring 112, and the supporting step 111 of the part can be connected with the second pressing element 13, so that the supporting step 111 and the second pressing element 13 jointly realize the clamping and fixing effect of the outer ring assembly 3 in the vertical direction.
As an embodiment of the present invention, the clamping member 12 includes a screw 121 and a nut 122, and the screw 121 is coupled to the nut 122 after passing through the limiting hole 113 from the inside of the positioning ring 112.
The outer side of the outer ring assembly 3 is abutted against the inner side of the positioning ring 112, then the screw 121 penetrates through the inner side of the outer ring assembly 3 and then penetrates out of the limiting hole 113 on the positioning ring 112, and the screw 121 is fastened on the positioning ring 112 after the screw 121 is screwed in from the outer side of the positioning ring 112 by the nut 122, so that the outer ring assembly 3 is fastened in the radial direction.
In one embodiment of the present invention, the limiting hole 113 is a uniform-diameter bar-shaped through hole.
Through setting the limiting hole 113 as the strip through hole, can make the position of outer loop subassembly 3 on the holding ring 112 can adjust as required, and because limiting hole 113 is the constant diameter, therefore, no matter in the position of limiting hole 113, can make screw 121 pass, realize the fastening to outer loop subassembly 3. By means of the arrangement, the outer ring assembly 3 can have a certain tolerance in production and processing, or can be suitable for clamping the outer ring assembly 3 with different sizes in a certain range.
Further, the inner diameter size of the positioning ring 112 is designed according to the outer diameter size of the outer ring assembly 3, so that the inner diameter size of the positioning ring 112 is slightly larger than the outer diameter size of the outer ring assembly 3; and 15-25 limiting holes 113 are sequentially formed in the positioning ring 112, so that 15-25 outer ring assemblies 3 can be simultaneously installed on one clamp body 1, and a plurality of outer ring assemblies 3 are sequentially installed on the clamp body 1, so that a spliced complete outer ring assembly 3 is formed. Therefore, the fixture can finish the spraying of 15-25 outer ring assemblies 3 by one-time spraying, and compared with the prior art, the single spraying has greatly improved efficiency; specifically, the number of the outer ring assemblies 3 accommodated on the jig body 1 is matched with the number of the split pieces of the outer ring assemblies 3, so that the machining is more convenient.
As one embodiment of the present invention, the base 2 includes a plurality of connection parts 21 for connecting with the clamp body 1, and a clamping part 22 for connecting the base 2 with the outside, wherein the plurality of connection parts 21 are uniformly distributed on the clamping part 22 and are connected with the outer side edge of the clamping part 22; the connecting parts 21 are connected with the supporting step 111 or the second pressing element 13; the outer edge of the clamping portion 22 is spaced apart from the inner edge of the support step 111 or the inner edge of the second pressing element 13 on the horizontal projection plane.
The connecting portion 21 is used for connecting the base 2 and the fixture body 1, specifically, the connecting portion 21 is used for being connected with the supporting step 111 or the second pressing element 13, the clamping portion 22 is used for being connected with a rotating shaft, a rotating table is usually arranged outside the fixture, a rotatable rotating shaft is arranged on the rotating table, the rotating shaft is connected with the rotating shaft through the clamping portion 22, the rotating shaft can drive the whole fixture to rotate, and the outer ring assembly 3 at each position on the fixture can be conveniently sprayed during spraying. Preferably, the cross section of the clamping part 22 is circular, a through hole is arranged in the middle of the clamping part 22, and the rotating shaft is connected with the base 2 after passing through; the number of the connecting parts 21 is generally 3-4, and the connecting parts 21 are uniformly distributed on the clamping part 22, so that after the clamping body is connected with the base 2, the whole clamp is more stable in the rotating process, and the eccentric phenomenon can not occur. The outer side edge of the clamping part 22 and the inner side edge of the supporting step 111 or the inner side edge of the second pressing element 13 are arranged at a distance on the horizontal projection surface, so that spraying materials are inevitably sprayed to the edge position of the outer ring assembly 3 when the spray gun sprays the spraying materials to the outer ring assembly 3 in the spraying process, and the outer side edge of the clamping part 22 of the base 2 and the inner side edge of the supporting step 111 or the inner side edge of the second pressing element 13 are arranged at a distance, even if a certain gap is reserved between the clamp body 1 and the base 2, the spraying materials are prevented from being sprayed to the clamping part 22 to rebound to the outer ring assembly 3, and the adhesive force of the spraying materials adhered by rebound is lower, so that the spraying quality is affected. Of course, the connecting portion 21 and the clamping portion 22 may be integrally formed.
As an embodiment of the invention, the first pressing element 11 and the second pressing element 13 are detachably connected by screw threads, and the first pressing element 11 or the second pressing element 13 and the base 2 are detachably connected by screw threads. Specifically, the connection may be made by a stud, or the detachable connection may be made by other threaded members or other structural connectors.
Example 2
Fig. 6 shows an embodiment of a spraying method of the present invention using the spraying jig for the split outer ring assembly 3, which includes the spraying method for the split outer ring assembly 3, and includes the following steps:
s1: cleaning the outer ring assembly 3;
the outer ring component 3 can be cleaned by wiping the oily solvent on the outer ring component 3, so that the surface of the outer ring component 3 is clean and is prepared for subsequent spraying;
s2: wrapping a protective layer on a non-spraying area of the outer ring assembly 3;
because the outer ring component 3 only needs to be sprayed on the inner surface, and other areas do not need to be sprayed, in order to facilitate the spraying, the friction force of the inner surface of the outer ring component 3 is usually improved, so that the adhesive force of a coating during the spraying is increased, and the spraying effect and the coating attaching reliability are conveniently improved; wherein, the sand blowing treatment is a simpler treatment for increasing the surface roughness, and the protection layer is wrapped on the outer ring assembly 3 for sand blowing protection; other surfaces that do not require painting do not require roughening, and if other non-painted areas are roughened and not protected by the paint, the rate of corrosion and aging by the environment is increased. In particular, the protective layer may be an adhesive tape, which is wound around the non-sprayed area of the outer ring assembly 3 for protection.
S3: carrying out sand blasting treatment on the outer ring assembly 3 to coarsen the surface layer of the region to be sprayed on the workpiece;
the sand blowing treatment can utilize the friction between the sand body and the inner surface of the outer ring assembly 3 so as to increase the roughness of the inner surface of the outer ring assembly 3 and improve the adhesive force of the coating during subsequent spraying.
Sa: detecting whether the protective layer of the non-spraying area of the outer ring assembly 3 is damaged, wrapping the protective layer again in the area if the protective layer is damaged, and entering the next step if the protective layer is not damaged;
although the sand blasting is performed on the inner surface of the outer ring assembly 3, which is the spraying area of the outer ring assembly 3, it is difficult to avoid the influence on the non-spraying area, so that the non-spraying area of the outer ring assembly 3 may be damaged by friction of the sand body during the sand blasting, and in order to avoid the area being adhered by the coating during the subsequent spraying, the damaged protective layer needs to be secondarily wrapped and protected, and if the protective layer is seriously damaged, the original protective layer needs to be detached first, and then a new protective layer needs to be wrapped.
S4: fixing a plurality of outer ring assemblies 3 on the clamp body 1, and fixing the clamp body 1 on the base 2;
the outer ring assemblies 3 are sequentially fixed through the clamp body 1, then the supporting steps 111 in the first pressing elements 11 on the clamp body 1 are connected with the base 2, the second pressing elements 13 face upwards, and the outer ring assemblies 3 are in a normal position.
S5: the base 2 is rotated and the spray gun is moved up and down to spray;
the spray gun sprays obliquely at a certain angle, preferably the injection angle of the spray gun is 60-90 degrees, so that the paint is conveniently attached to the outer ring assembly 3 after being sprayed from the spray gun; the greater the spray speed of the spray gun, the greater the adhesion thickness of the paint in the same unit time, and the lesser the spray speed of the spray gun, the lesser the adhesion thickness of the paint in the same unit time, and in order to make the adhesion of the paint more uniform, the spray speed of the spray gun is preferably 150mm/s to 250mm/s; in the spraying process, the base 2 rotates along with the rotating shaft of the turntable, so that different outer ring assemblies 3 clamped on the clamp body 1 can be sprayed, and the rotating speed of the rotating shaft is preferably 100 r/min-150 r/min, so that the base 2 rotates at the rotating speed of 100 r/min-150 r/min; in the spraying process, the spray gun can keep the incidence angle to move up and down, so that different positions of the outer ring assembly 3 in the vertical direction can be sprayed, and as the spraying angle of the spray gun is fixed, although the spray gun can also move up and down in the spraying process, the coating at the top of the outer ring assembly 3 is generally thicker than the coating at the bottom, and preferably, the clamp body 1 is turned over when the number of times of upward and downward movement of the spray gun is 2-4, and then the spraying operation is continued, so that the excessive uneven coating attachment thickness at different positions of the outer ring assembly 3 is avoided. In the spraying process, the coating is melted and then sprayed by a spray gun, and on one hand, in order to ensure the adhesive force of the coating, the outer ring assembly 3 needs to have a certain temperature to be beneficial to the adhesion of the coating; on the other hand, since the material of the outer ring assembly 3 itself has a certain requirement for high temperature resistance, the material performance is reduced due to the excessively high temperature, and therefore, the surface temperature of the outer ring assembly 3 is generally not more than 150 degrees in the spraying process.
S6: the clamp body 1 is detached from the base 2 and is fixed on the base 2 again after being turned 180 degrees;
the step is taken as one of the invention points, the outer ring assembly 3 can be integrally inverted, the outer ring assembly 3 is inverted by overturning the clamp body 1, the phenomenon of uneven coating thickness caused by directional spray of the spray gun is compensated by utilizing the integral overturning of the outer ring assembly 3, and important guarantee is provided for the uniform coating thickness of the whole outer ring assembly 3.
S7: the base 2 is rotated and the spray gun is moved up and down to spray;
the spraying process in the step is the same as that in the step S5, but in the step, the placing state of the outer ring assembly 3 is inverted, the placing position of the clamp body 1 is also inverted, the second pressing element 13 is connected with the base 2, the first pressing element 11 is placed upwards, the injection angle of the spray gun is 60-90 degrees, the spraying speed of the spray gun is 150-250 mm/S, the rotating speed of the base 2 is 100-150 r/min, and the number of up-and-down movements of the spray gun is 2-4 times.
S8: detecting whether the spraying is finished, if so, entering the next step, and if not, returning to the step S4;
in the spraying process, two groups of different coatings of a bottom layer and a surface layer are required to be sprayed in sequence, the bottom layer is sprayed with a plasma nickel cobalt chromium aluminum yttrium tantalum coating, and the surface layer is sprayed with a nickel chromium aluminum/silicon dioxide coating; the spraying of the bottom layer and the surface layer is carried out by adopting the same spraying process, so that the step is to detect whether the spraying is finished or not, and the thickness of the coating is measured by adopting a caliper rule and measuring the thickness difference of the outer ring assembly 3 before and after the spraying; and (3) spraying the surface layer after the spraying of the bottom layer is finished, and entering the next step after the final surface layer is also sprayed.
S9: the outer ring assembly 3 is removed from the fixture body 1 and then cleaned after painting.
After the spraying is finished, the outer ring assembly 3 needs to be detached from the fixture body 1, and then the protective layer on the outer ring assembly 3 is removed, so that the cleaning after the spraying is realized.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The split outer ring assembly spraying clamp comprises a clamp body (1) and a base (2), wherein the clamp body (1) is connected with the base (2); the clamp is characterized in that the clamp body (1) comprises a first compression element (11) used for positioning and compressing, a plurality of clamping elements (12) used for radially clamping from a circular ring, and a second compression element (13) used for axially compressing from the circular ring, wherein the first compression element (11), the clamping elements (12) and the second compression element (13) are all of circular ring structures, the second compression element (13) covers the first compression element (11) and is detachably connected with the first compression element, and the clamping elements (12) are detachably connected with the side part of the circular ring of the first compression element (11); the base (2) is detachably connected with the first pressing element (11) or the second pressing element (13) respectively under different working states; the first pressing element (11) comprises a supporting step (111) and a positioning ring (112) provided with a plurality of limiting holes (113), the positioning ring (112) and the supporting step (111) are of circular ring structures, the positioning ring (112) is arranged on the supporting step (111), and the supporting step (111) can be detachably connected with the base (2); the clamping elements (12) are respectively penetrated through the limiting holes (113) and detachably connected with the positioning ring (112); the second pressing element (13) is abutted with the positioning ring (112) and detachably connected with the supporting step (111).
2. The split outer ring assembly spray fixture of claim 1, wherein the inner diameter of the locating ring (112) is greater than the inner diameter of the support step (111), and the outer diameter of the locating ring (112) is less than the outer diameter of the support step (111).
3. The split outer ring assembly spray fixture according to claim 1 or 2, wherein the clamping element (12) comprises a screw (121) and a nut (122), the screw (121) passing through the limiting hole (113) from inside the positioning ring (112) and being connected to the nut (122).
4. A split outer ring assembly spraying clamp according to claim 3, characterized in that the base (2) comprises a plurality of connecting parts (21) used for being connected with the clamp body (1), clamping parts (22) used for connecting the base (2) with the outside, and the plurality of connecting parts (21) are uniformly distributed on the clamping parts (22) and are connected with the outer side edges of the clamping parts (22); the connecting parts (21) are connected with the supporting steps (111) or the second pressing elements (13); the outer side edge of the clamping part (22) is separated from the inner side edge of the supporting step (111) or the inner side edge of the second pressing element (13) by a distance on a horizontal projection plane.
5. A spraying method using the split outer ring assembly spraying jig according to any one of claims 1 to 4, comprising the steps of:
s1: cleaning the outer ring assembly (3);
s2: wrapping a protective layer in a non-spraying area of the outer ring assembly (3);
s3: carrying out sand blasting treatment on the outer ring assembly (3) to coarsen the surface layer of the area to be sprayed on the workpiece;
s4: fixing a plurality of outer ring assemblies (3) on a clamp body (1), and fixing the clamp body (1) on a base (2);
s5: rotating the base (2) and simultaneously enabling the spray gun to move up and down for spraying;
s6: the clamp body (1) is detached from the base (2) and is fixed on the base (2) again after being turned 180 degrees;
s7: rotating the base (2) and simultaneously enabling the spray gun to move up and down for spraying;
s8: detecting whether the spraying is finished, if so, entering the next step, and if not, returning to the step S4;
s9: the outer ring assembly (3) is removed from the clamp body (1) and then cleaned after being coated.
6. The spraying method according to claim 5, wherein in the step S5 and the step S7, the injection angle of the spray gun is 60 ° to 90 °, and the number of upward and downward movements of the spray gun is 2 to 4.
7. The spraying method according to claim 5, characterized in that in the step S5 and the step S7, the rotational speed of the base (2) is 100r/min to 150r/min and/or the spraying speed of the spray gun is 150mm/S to 250mm/S.
8. The spraying method according to any one of claims 5 to 7, wherein in step S5 and step S7, the bottom layer spraying of the plasma niclcyan tantalum is performed first, and then the surface layer spraying of nicyan/silica is performed.
9. The spraying method according to claim 8, further comprising the step of, before step S4: detecting whether the protective layer of the non-spraying area of the outer ring assembly (3) is damaged, wrapping the protective layer again in the area if the protective layer is damaged, and entering the next step if the protective layer is not damaged.
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| CN202111107868.8A CN113981355B (en) | 2021-09-22 | 2021-09-22 | Split outer ring assembly spraying clamp and method |
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| CN202111107868.8A CN113981355B (en) | 2021-09-22 | 2021-09-22 | Split outer ring assembly spraying clamp and method |
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| CN113981355B true CN113981355B (en) | 2023-10-20 |
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| US20160010197A1 (en) * | 2013-03-06 | 2016-01-14 | United Technologies Corporation | Fixturing for thermal spray coating of gas turbine components |
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| CN214211021U (en) * | 2020-12-01 | 2021-09-17 | 武汉协和齿环有限公司 | Molybdenum frock and system are spouted to synchronizer ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090174150A1 (en) * | 2008-01-08 | 2009-07-09 | Thomas Smith | Lateral side protection of a piston ring with a thermally sprayed coating |
| US20160010197A1 (en) * | 2013-03-06 | 2016-01-14 | United Technologies Corporation | Fixturing for thermal spray coating of gas turbine components |
| CN104549842A (en) * | 2015-01-09 | 2015-04-29 | 哈尔滨东安发动机（集团）有限公司 | Thin-wall ring spray protection tool |
| CN204711616U (en) * | 2015-05-20 | 2015-10-21 | 智腾机械设备（上海）有限公司 | A kind of half-opened impeller processing tool |
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| CN214211021U (en) * | 2020-12-01 | 2021-09-17 | 武汉协和齿环有限公司 | Molybdenum frock and system are spouted to synchronizer ring |
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|---|---|
| CN113981355A (en) | 2022-01-28 |
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