CN113981355A

CN113981355A - Split outer ring assembly spraying clamp and method

Info

Publication number: CN113981355A
Application number: CN202111107868.8A
Authority: CN
Inventors: 陈建强; 姬小兰; 张远应; 卢美霖; 云海涛; 梁加宽; 杨俊波; 卢磊
Original assignee: AECC South Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-01-28
Anticipated expiration: 2041-09-22
Also published as: CN113981355B

Abstract

The invention relates to the technical field of spraying of outer ring components, in particular to a split outer ring component spraying clamp and a method, wherein the split outer ring component spraying clamp comprises a clamp body and a base, wherein the clamp body is connected with the base; the clamp body comprises a first pressing element for positioning and pressing, a plurality of clamping elements for clamping from the radial direction of the ring and a second pressing element for pressing from the axial direction of the ring, the first pressing element, the clamping elements and the second pressing element are all in circular ring structures, the second pressing element covers the first pressing element and is detachably connected with the first pressing element, and the clamping elements are detachably connected with the side part of the ring of the first pressing 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 fixing difficulty of the outer ring assembly, low spraying efficiency and poor spraying thickness uniformity in the machining process.

Description

Split outer ring assembly spraying clamp and method

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 is that a spraying material is heated by a certain heat source, the heated material forms particles in a molten or semi-molten state, the particles impact and deposit on the surface of a substrate at a certain speed to form a spraying layer with certain characteristics, and the spraying layer is widely applied to the surface of an aeroengine component. Because of the requirement of the processing technology, the turbine outer ring component is usually processed in a split manner, and the inner surface of the outer ring component needs to be sprayed in the using process. On one hand, the single-section part of the outer ring component is small, so that the protection and fixing difficulty in the machining process is high; on the other hand, the efficiency of spraying and processing the single outer ring component is low; in addition, in the spraying process, the uniformity of the coating thickness on the surface of the outer ring component is poor, so that when the outer ring component is assembled into a whole ring subsequently, the height difference of the coating thickness on the surface of the outer ring component is large, and the performance in the subsequent use process is further influenced.

Chinese patent CN112846881A discloses a fixture for processing arc surfaces of workpieces and a processing method, wherein the fixture is mounted on a lathe, and the arc surfaces of a plurality of workpieces are simultaneously lathed, so that the production efficiency is high. Clamping a plurality of workpieces simultaneously can promote machining efficiency, but turning is different with the spraying process, and the problem that the coating thickness uniformity of the surface is poor can not be solved to this kind of anchor clamps.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a spraying method of a split outer ring assembly, and can solve the problems of high protection and fixing difficulty, low spraying efficiency and poor spraying thickness uniformity of the outer ring assembly in the machining process.

In order to solve the technical problems, the invention adopts the technical scheme that:

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 body comprises a first pressing element for positioning and pressing, a plurality of clamping elements for clamping from the radial direction of the ring and a second pressing element for pressing from the axial direction of the ring, the first pressing element, the clamping elements and the second pressing element are all in circular ring structures, the second pressing element covers the first pressing element and is detachably connected with the first pressing element, and the clamping elements are detachably connected with the side part of the ring of the first pressing 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 the 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, all the outer ring assemblies can be sprayed, and the aim of uniform spraying can be favorably fulfilled. The clamp body with the circular ring structure is arranged to meet the requirement of the shape of the outer ring assembly, so that the outer ring assemblies can be sequentially arranged along the circumferential direction of the clamp body in a relatively fitting manner and are arranged on the first pressing element, and the inner surface of each outer ring assembly needs to be sprayed; 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 penetrates through the first pressing element to fix the outer ring assembly from the radial direction of the circular ring; the second pressing element is aligned with the top of the outer ring assembly to apply force to fix the outer ring assembly from the upper part of the outer ring assembly; because the spray gun is sprayed obliquely from top to bottom, when the outer ring assembly is placed rightly, the first pressing element is detachably connected with the base, and the second pressing element is placed upwards; when the outer ring assembly is turned over by 180 degrees and then is inverted, the second pressing element is detachably connected with the base, and the first pressing element is placed upwards. The arrangement sequence of the first pressing elements or the second pressing elements is continuously adjusted in the spraying process, so that the outer ring assembly is continuously turned over, the aim of uniform spraying is fulfilled, and the problem that the thickness of the whole surface is not uniform due to the fact that the coating on the upper part of the outer ring assembly is too thick and the coating on the lower part of the outer ring assembly is too thin is solved; the first pressing element, the clamping element, the second pressing element and the base are detachably connected, so that the outer ring assembly can be conveniently mounted and dismounted, and the upper position and the lower position of the outer ring assembly can be continuously adjusted 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 both in 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 arranged in the limiting holes in a penetrating manner and are detachably connected with the positioning ring; the second pressing element is abutted to 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 for connecting with the clamp body and a clamping part for connecting the base with the outside, and the connecting parts are uniformly distributed on the clamping part and are connected with the outer side edge of the clamping part; the connecting parts are connected with the supporting steps or the second pressing elements; the outer edge of the clamping part and the inner edge of the supporting step or the inner edge of the second pressing element are separated by a certain distance on a horizontal projection plane.

The invention also provides a spraying method applying the split outer ring component spraying clamp, which comprises the following steps:

s1: cleaning the outer ring assembly;

s2: wrapping a protective layer on a non-spraying area of the outer ring component;

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 components on a fixture body, and fixing the fixture body on a base;

s5: rotating the base and simultaneously moving the spray gun up and down for spraying;

s6: the clamp body is detached from the base, turned over for 180 degrees and then fixed on the base again;

s7: rotating the base and simultaneously moving the spray gun up and down for spraying;

s8: detecting whether the spraying is finished or not, 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 cleaning after coating.

The invention is provided with

Further, in the step S5 and the step S7, the injection angle of the spray gun is 60 ° to 90 °, and the number of times of the up-and-down movement of the spray gun is 2 to 4.

Further, in the step S5 and the step S7, the rotating speed of the base is 100r/min to 150r/min and/or the spraying speed of the spray gun is 150mm/S to 250 mm/S.

Further, in the step S5 and the step S7, the plasma spraying of the nickel-cobalt-chromium-aluminum-yttrium-tantalum bottom layer is performed first, and then the spraying of the nickel-chromium-aluminum/silicon dioxide surface layer is performed.

Further, before step S4, the method further includes the following steps: and detecting whether the protective layer of the non-spraying area of the outer ring assembly is damaged or not, wrapping the protective layer in the area again 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 outer ring assemblies are clamped and fixed by the clamp, so that the clamp is attached to the outer ring assemblies by the aid of the annular structure of the clamp, and protection and fixing effects on the outer ring assemblies are further improved; on the other hand, a plurality of outer ring components can be sprayed in one-time spraying process, so that the working efficiency is greatly improved;

(2) the both ends of anchor clamps body are the support step or the second on the first compressing element and compress tightly the component and all can dismantle with the base and be connected, make at the spraying in-process, the anchor clamps body can overturn, make outer loop subassembly just put and invert and place in turn, compensatied the inhomogeneous defect of spraying that the fixed injection angle of spray gun brought, make outer loop subassembly can keep even thickness in vertical direction, further promoted the uniformity of coating thickness.

Drawings

FIG. 1 is a schematic structural view of a split outer ring assembly spray coating fixture of the present invention;

FIG. 2 is a schematic view of a first pressing member;

FIG. 3 is a schematic structural view of a base;

FIG. 4 is a schematic structural view of an outer ring assembly;

FIG. 5 is a diagram illustrating a state of the spray coating fixture for a split outer ring assembly according to the present invention;

FIG. 6 is a flow chart of a method for spraying a split outer ring assembly according to the present invention.

The graphic symbols are illustrated as follows:

1. a clamp body; 11. a first pressing member; 111. supporting a step; 112. a positioning ring; 113. a limiting hole; 12. a clamping element; 121. a screw; 122. a nut; 13. a second pressing member; 2. a base; 21. a connecting portion; 22. a clamping part; 3. an outer ring assembly;

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Example 1

Fig. 1 to 5 show an embodiment of a split outer ring assembly spraying fixture of the present invention, which includes a fixture body 1 and a base 2, wherein the fixture body 1 is connected to the base 2; the clamp body 1 comprises a first pressing element 11 for positioning and pressing, a plurality of clamping elements 12 for clamping from the radial direction of a circular ring and a second pressing element 13 for pressing from the axial direction of the circular ring, wherein the first pressing element 11, the clamping elements 12 and the second pressing element 13 are all in a circular structure, the second pressing element 13 covers the first pressing element 11 and is detachably connected with the first pressing element 11, and the clamping elements 12 are detachably connected with the side part of the circular ring of the first pressing 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 having a plurality of limiting holes 113, the positioning ring 112 and the supporting step 111 are both circular ring structures, and the positioning ring 112 is installed on the supporting step 111, and the supporting step 111 can be detachably connected with the base 2; the clamping elements 12 are respectively arranged in the limiting holes 113 in a penetrating way and are detachably connected with the positioning ring 112; the second pressing element 13 abuts against the positioning ring 112 and is detachably connected to the support step 111.

The support step 111 is used on the one hand to provide support for the bottom of the outer ring assembly 3 and on the other hand to cooperate with the second pressing element 13 to clamp the outer ring assembly 3 together in the vertical direction; the positioning ring 112 serves to retain the side of the split outer ring assembly 3, in particular by bringing the outer surface of the outer ring assembly 3 into abutment with the inner surface of the positioning ring 112, and then fixedly clamped by the clamping elements 12. The position-limiting hole 113 serves to limit the position of the clamping element 12, so that the clamping element 12 can pass through the outer ring component 3, then pass through the position-limiting hole 113 and then 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 support step 111, and the outer diameter of the positioning ring 112 is smaller than the outer diameter of the support step 111.

The positioning ring 112 is mounted on the supporting step 111, and the inner diameter of the positioning ring 112 is larger than that of the supporting step 111, so that a part of the supporting step 111 is located at the inner side of the positioning ring 112, and the part of the supporting step 111 can provide support for the outer ring assembly 3; the outer diameter of the positioning ring 112 is smaller than the outer diameter of the supporting step 111, so that a part of the supporting step 111 is located outside the positioning ring 112, and the part of the supporting step 111 can be connected with the second pressing element 13, so that the supporting step 111 and the second pressing element 13 together achieve the clamping fixing effect of the outer ring assembly 3 in the vertical direction.

As an embodiment of the present invention, the clamping element 12 comprises a screw 121 and a nut 122, and the screw 121 is connected with the nut 122 after passing through the limiting hole 113 from the inner side of the positioning ring 112.

The outer side of the outer ring component 3 abuts against the inner side of the positioning ring 112, then the screw 121 penetrates through the inner side of the outer ring component 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 component 3 is fastened in the radial direction.

In one embodiment of the present invention, the limiting holes 113 are strip-shaped through holes with equal diameters.

The position of the outer ring component 3 on the positioning ring 112 can be adjusted as required by arranging the limiting hole 113 as a strip-shaped through hole, and the limiting hole 113 has the same diameter, so that the screw 121 can penetrate through the limiting hole 113 at any position to fasten the outer ring component 3. By the arrangement, the outer ring component 3 can have certain tolerance in production and processing, or can be suitable for clamping the outer ring component 3 with different sizes in a certain range.

Further, the inner diameter dimension of the positioning ring 112 is designed according to the outer diameter dimension of the outer ring assembly 3, so that the inner diameter dimension of the positioning ring 112 is slightly larger than the outer diameter dimension of the outer ring assembly 3; and be equipped with 15 ~ 25 spacing holes 113 in proper order on holding ring 112, make a anchor clamps body 1 can install 15 ~ 25 outer loop subassemblies 3 simultaneously, a plurality of outer loop subassembly 3 is installed in proper order on anchor clamps body 1, has formed the complete outer loop subassembly 3 that a concatenation formed. Thus, 15-25 outer ring components 3 can be sprayed by the clamp of the invention at one time, and compared with the original single spraying, the efficiency is greatly improved; specifically, the number of the outer ring components 3 accommodated on the jig body 1 is matched with the number of the split portions of the outer ring components 3, so that the processing is more convenient.

As an embodiment of the present invention, the base 2 includes a plurality of connecting portions 21 for connecting with the clamp body 1, and a clamping portion 22 for connecting the base 2 with the outside, the plurality of connecting portions 21 are uniformly distributed on the clamping portion 22 and connected with the outer side edge of the clamping portion 22; the connecting parts 21 are connected with the supporting steps 111 or the second pressing element 13; the outer edge of the clamping part 22 is spaced from the inner edge of the supporting step 111 or the inner edge of the second pressing member 13 in a horizontal projection plane.

Connecting portion 21 is used for connecting base 2 and anchor clamps body 1, specifically, connecting portion 21 is used for being connected with support step 111 or second hold-down element 13, and clamping portion 22 is used for being connected with the pivot, is equipped with the revolving stage outside anchor clamps usually, is equipped with rotatable pivot on the revolving stage, is connected with the pivot through clamping portion 22, makes the pivot can drive whole anchor clamps and rotates, and the outer loop subassembly 3 of each position can all obtain the spraying on anchor clamps when being convenient for the 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 through hole; connecting portion 21 sets up 3 ~ 4 usually, and connecting portion 21 equipartition in clamping portion 22 makes after pressing from both sides tight body and base 2 are connected, and at the rotation in-process, whole anchor clamps are more steady, the eccentric phenomenon can not appear. The outer edge of the clamping part 22 and the inner edge of the supporting step 111 or the inner edge of the second pressing element 13 are arranged at a distance on the horizontal projection plane, because in the spraying process, the spraying material is sprayed to the outer ring assembly 3 by a spray gun and inevitably sprayed to the edge of the outer ring assembly 3, and the outer edge of the clamping part 22 of the base 2 and the inner edge of the supporting step 111 or the inner edge of the second pressing element 13 are arranged at a distance, even if a certain gap is left between the clamp body 1 and the base 2, the spraying material can be prevented from being sprayed to the clamping part 22 and rebounded to the outer ring assembly 3, and the adhesion force of the spraying material which is adhered through rebounding is low, and the spraying quality can be influenced. Of course, the connecting portion 21 and the clamping portion 22 may be formed integrally.

As an embodiment of the present invention, the first pressing element 11 and the second pressing element 13, and the first pressing element 11 or the second pressing element 13 and the base 2 are detachably connected by screws. In particular, the connection can be made by means of studs, or can be made detachable by means of other screws or other structural connecting elements.

Example 2

Fig. 6 shows an embodiment of a spraying method using the spraying jig for the split outer ring assembly 3, including the spraying method for the split outer ring assembly 3, according to the present invention, which includes the following steps:

s1: cleaning the outer ring assembly 3;

the outer ring component 3 can be cleaned by wiping an oily solvent on the outer ring component 3 to prepare for subsequent spraying;

s2: wrapping a protective layer on the non-spraying area of the outer ring component 3;

because the outer ring component 3 only needs spraying on the inner surface, and other areas do not need spraying, in order to facilitate spraying, the friction force of the inner surface of the outer ring component 3 is usually improved, so as to increase the adhesive force of the coating during spraying, and facilitate the improvement of the spraying effect and the coating adhesion reliability; the sand blowing treatment is a simple treatment for increasing the surface roughness, and the outer ring component 3 is wrapped with a protective layer for sand blowing protection; other surfaces that do not require painting do not require roughening, which can accelerate corrosion and degradation by the environment if other non-painted areas are roughened without protection from the paint. Specifically, the protective layer may be an adhesive tape, and the adhesive tape is wound around the non-sprayed region of the outer ring member 3 for protection.

S3: carrying out sand blasting treatment on the outer ring component 3 to coarsen the surface layer of the area to be sprayed on the workpiece;

the sand blasting treatment can utilize the sand body to rub the inner surface of the outer ring component 3 so as to increase the roughness of the inner surface of the outer ring component 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 or not, wrapping the protective layer in the area again if the protective layer is damaged, and entering the next step if the protective layer is not damaged;

although the sand blasting treatment is performed on the spraying area of the outer ring assembly 3, that is, the inner surface of the outer ring assembly 3, the sand blasting treatment inevitably affects the non-spraying area, so that the non-spraying area of the outer ring assembly 3 may be damaged by friction of a sand body in the sand blasting process, and in order to avoid the damage of the area caused by the coating in the subsequent spraying process, the damaged protective layer needs to be subjected to secondary coating protection, 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 coated.

S4: fixing a plurality of outer ring components 3 on a clamp body 1, and then fixing the clamp body 1 on a base 2;

the outer ring assemblies 3 are sequentially fixed by the fixture body 1, and then the supporting steps 111 in the first pressing elements 11 on the fixture body 1 are connected with the base 2, so that the second pressing elements 13 face upwards, and at this time, the outer ring assemblies 3 are in a positive state.

S5: rotating the base 2 and simultaneously enabling the spray gun to move up and down for spraying;

the spray gun sprays obliquely at a section of angle, preferably the injection angle of the spray gun is 60-90 degrees, so that the coating is conveniently sprayed out of the spray gun and then attached to the outer ring component 3; the larger the spray velocity of the spray gun, the larger the thickness of the coating material adhered to the spray gun in the same unit time, and the smaller the spray velocity of the spray gun, the smaller the thickness of the coating material adhered to the spray gun in the same unit time, and the spray velocity of the spray gun is preferably 150mm/s to 250mm/s in order to make the adhesion of the coating material more uniform; in the spraying process, the base 2 rotates along with the rotating shaft of the turntable, so that different outer ring components 3 clamped on the clamp body 1 can be sprayed, the rotating speed of the rotating shaft is preferably 100 r/min-150 r/min, and 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 incident angle to move up and down, so that the outer ring assembly 3 can be sprayed at different positions in the vertical direction, 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 larger than the coating at the bottom, preferably, the clamp body 1 is overturned when the spray gun moves up and down for 2-4 times, and then the spraying work is continued, so that the excessive non-uniformity of the coating adhesion 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, so that the outer ring component 3 needs to have certain temperature to be favorable for the adhesion of the coating in order to ensure the adhesion of the coating; on the other hand, since the material of the outer ring member 3 itself has a certain requirement for high temperature resistance, too high temperature causes the material performance to be degraded, and therefore, the surface temperature of the outer ring member 3 does not exceed 150 degrees in the spraying process.

S6: the clamp body 1 is detached from the base 2, turned over for 180 degrees and then fixed on the base 2 again;

the step is one of the invention points of the invention, the outer ring component 3 can be inverted integrally, the outer ring component 3 is inverted by overturning the clamp body 1, the phenomenon of uneven coating thickness caused by directional spraying of a spray gun is compensated by utilizing the integral overturning of the outer ring component 3, and important guarantee is provided for the even coating thickness of the whole outer ring component 3.

S7: rotating the base 2 and simultaneously enabling the spray gun to move up and down for spraying;

the step is the same as the spraying process in the step S5, but in the step, the placing state of the outer ring component 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, similarly, 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 times of the up-and-down movement of the spray gun is 2-4 times.

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 plasma Ni-Co-Cr-Al-Y-Ta coating, and the surface layer is sprayed with Ni-Cr-Al/silica coating; whether the spraying of the bottom layer or the surface layer is carried out or not is carried out by adopting the same spraying process, so that whether the spraying is finished or not needs to be detected in the step, the thickness is usually measured by adopting a caliper, and the thickness difference of the outer ring component 3 before and after the spraying is utilized to measure the thickness of the coating; and after the bottom layer is sprayed, spraying the surface layer, and finally, after the surface layer is also sprayed, entering the next step.

S9: the outer ring assembly 3 is removed from the jig body 1 and cleaned after painting.

After the spraying is finished, the outer ring component 3 needs to be detached from the clamp body 1, then the protective layer on the outer ring component 3 is removed, and the cleaning after the spraying is realized.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

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 pressing element (11) for positioning and pressing, a plurality of clamping elements (12) for clamping from the radial direction of a ring and a second pressing element (13) for pressing from the axial direction of the ring, wherein the first pressing element (11), the clamping elements (12) and the second pressing element (13) are all in a circular ring structure, the second pressing element (13) covers the first pressing element (11) and is detachably connected with the first pressing element, and the clamping elements (12) are detachably connected with the side part of the ring of the first pressing element (11); the base (2) is detachably connected to the first pressing element (11) or the second pressing element (13) in different operating states.

2. The split outer ring component spray coating clamp according to claim 1, wherein 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 both circular 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 arranged in the limiting holes (113) in a penetrating way and are detachably connected with the positioning ring (112); the second pressing element (13) abuts against the positioning ring (112) and is detachably connected with the supporting step (111).

3. The split outer ring assembly spray fixture of claim 2, wherein said retaining ring (112) has an inner diameter greater than an inner diameter of said support step (111), and said retaining ring (112) has an outer diameter less than an outer diameter of said support step (111).

4. The split outer ring assembly spray fixture of claim 2 or 3, wherein said clamping element (12) comprises a screw (121) and a nut (122), said screw (121) passing through said limiting hole (113) from inside said positioning ring (112) and then connecting with said nut (122).

5. The split outer ring component spraying clamp as claimed in claim 4, wherein the base (2) comprises a plurality of connecting portions (21) for connecting with the clamp body (1) and a clamping portion (22) for connecting the base (2) with the outside, and the plurality of connecting portions (21) are uniformly distributed on the clamping portion (22) and are connected with the outer side edge of the clamping portion (22); a plurality of connecting parts (21) are connected with the supporting step (111) or the second pressing element (13); the outer side edge of the clamping part (22) is at a distance from the inner side edge of the supporting step (111) or the inner side edge of the second pressing element (13) on a horizontal projection plane.

6. A spraying method using the split outer ring assembly spraying jig as claimed in any one of claims 1 to 5, characterized by 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 component (3);

s3: carrying out sand blasting treatment on the outer ring component (3) to coarsen the surface layer of the area to be sprayed on the workpiece;

s4: fixing a plurality of outer ring components (3) on a clamp body (1), and then 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), turned over for 180 degrees and then fixed on the base (2) again;

s7: rotating the base (2) and simultaneously enabling the spray gun to move up and down for spraying;

s9: and removing the outer ring component (3) from the clamp body (1) and cleaning after coating.

7. The coating method according to claim 6, wherein in the steps S5 and S7, the injection angle of the spray gun is 60-90 °, and the number of times of the up-and-down movement of the spray gun is 2-4.

8. The spraying method according to claim 6, wherein in the steps S5 and S7, the rotating speed of the base (2) is 100r/min to 150r/min and/or the spraying speed of the spray gun is 150mm/S to 250 mm/S.

9. The spraying method according to any one of claims 6 to 8, wherein in the steps S5 and S7, the plasma spraying of the Ni-Co-Cr-Al-Y-Ta primer layer is performed, and then the Ni-Cr-Al/Si-oxide topcoat layer is performed.

10. The spraying method according to claim 9, further comprising, before step S4, the steps of: and detecting whether the protective layer of the non-spraying area of the outer ring assembly (3) is damaged or not, wrapping the protective layer in the area again if the protective layer is damaged, and entering the next step if the protective layer is not damaged.