A regenerative surface treatment method for thermal spraying coating on ceramic workpieces and coating equipment

Abstract

The present invention relates to a regenerative surface treatment method for ceramic workpiece thermal spraying coating, including a cleaning process, a first thermal spraying process, a second thermal spraying process, and a grinding process; the present invention also provides a ceramic workpiece thermal spraying coating device according to the above treatment method, including a machine base, a cleaning mechanism arranged on the machine base and used for cleaning the ceramic rotor, a thermal spraying mechanism arranged on the machine base and used for thermally spraying a coating layer on the outer surface of the blades of the ceramic rotor, at least two shielding mechanisms arranged in the thermal spraying mechanism and used for shielding and cooling the side walls on both sides of the blades, a grinding mechanism arranged in the thermal spraying mechanism and used for grinding the coating layer flat, a support mechanism movably arranged between the cleaning mechanism and the thermal spraying mechanism and used for supporting the rotating shaft on the ceramic rotor, and a conveying mechanism arranged outside the machine base and used for positioning and conveying the ceramic rotor onto the support mechanism. The present invention solves the problems of poor existing thermal spraying coating treatment methods, excessive temperature changes, and low finished product rates.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal spraying coating, and particularly relates to a regenerative surface treatment method and coating equipment for thermal spraying coating of ceramic workpieces. Background Art

[0002] Ceramic workpieces are usually made of ceramic materials such as alumina and zirconia. These materials have good mechanical properties and chemical stability and are widely used in fields such as automobiles, aerospace, and medical devices. They are mainly processed and formed by grinding, cutting, and drilling. In addition, in order to improve the overall performance stability of ceramic workpieces during use, thermal spraying coating treatment is usually required on the surface to enhance corrosion resistance, extend service life, and adapt to special working environments. Thermal spraying coating is a special treatment technology in surface treatment and has a wide range of uses. It is also called thermal spraying or spray welding. Its basic principle is to heat and melt powder materials or wire materials, and under the high-speed transportation of gas, impact and adhere to the surface of the substrate or workpiece, and then accumulate and solidify to form a film thickness or coating to achieve purposes such as wear resistance, lubrication, heat insulation, and strengthening.

[0003] The patent document with the patent number CN111441008A discloses an automatic ceramic thermal spraying device, including a clamping mechanism, a raw material tank, a first connecting pipe, an oxygen tank, a second connecting pipe, a first three-way pipe, a third connecting pipe, a first annular pipe, a spray gun, a second annular pipe, a nozzle, a moving drive mechanism, a blowing mechanism, a rotating table, and a frame; the raw material tank is communicated with the first three-way pipe through the first connecting pipe, the oxygen tank is communicated with the first three-way pipe through the second connecting pipe, and both ends of the third connecting pipe are respectively communicated with the first three-way pipe and the first annular pipe; the output end of the blowing mechanism is communicated with the second annular pipe; the moving drive mechanism includes an installation table, an installation frame, and a linear guide rail; a driving device for driving the rotating table to rotate is arranged on the frame; a cylinder for driving the installation plate to move horizontally is arranged on the rotating table. The present invention can process two workpieces at one time, and the two workpieces are respectively in the thermal spraying state and the cooling state, which improves the processing efficiency of the workpieces and is convenient for disassembling and assembling the workpieces.

[0004] However, the inventor found that during the actual production of thermal spraying coating of ceramic workpieces, the processing method of thermal spraying coating is not good, which will cause the local temperature of the ceramic workpiece to be too high. Under the sudden high temperature change, the internal stress of the ceramic will be uneven, resulting in the expansion of the tiny gaps inside the ceramic, making the structure of the ceramic unstable, and deformation or fracture may occur. Especially when the ceramic wall at the thermal spraying coating part of the ceramic workpiece is thin, it is more likely to be damaged, there are product quality problems, and the yield is low. Summary of the Invention

[0005] The object of the present invention is to address the deficiencies of the prior art. During the process of thermal spraying and coating the cleaned and dried ceramic workpieces, the first thermal spraying surface and the second thermal spraying surface on both sides of the coated ceramic wall are thermally sprayed and coated step by step, facilitating the cooling of the coated ceramic wall during the thermal spraying process, avoiding deformation or fracture of the relatively thin coated ceramic wall caused by excessive temperature changes. After the coating is completed, the joint between the coating layers on the first thermal spraying surface and the second thermal spraying surface is polished flat to complete the production, with a high yield rate and a good processing method. Thus, it solves the problems of poor processing methods for existing thermal spraying and coating, excessive temperature changes, and low yield rates.

[0006] For the above technical problems, the following technical solution is adopted: A regenerative surface treatment method for thermal spraying and coating of ceramic workpieces, comprising the following steps:

[0007] Step 1: Cleaning process. After shielding the non-thermal spraying surface of the ceramic workpiece, the exposed ceramic wall is the coated ceramic wall and its surface is the thermal spraying surface, and then precise local cleaning and drying are sequentially carried out on the thermal spraying surface.

[0008] Step 2: First thermal spraying process. A coating layer is thermally sprayed on the first thermal spraying surface on one side of the coated ceramic wall. Before thermally spraying the first thermal spraying surface, the second thermal spraying surface on the other side of the coated ceramic wall is shielded, facilitating the cooling treatment of the coated ceramic wall through the second thermal spraying surface.

[0009] Step 3: Second thermal spraying process. The coating layer is thermally sprayed on the second thermal spraying surface. Before thermally spraying the second thermal spraying surface, the coating layer on the second thermal spraying surface is shielded, enabling the coating layers on the first thermal spraying surface and the second thermal spraying surface to be spliced with each other, and at the same time facilitating the cooling treatment of the coated ceramic wall through the first thermal spraying surface.

[0010] Step 4: Polishing process. After polishing the joint between the coating layers on the first thermal spraying surface and the second thermal spraying surface flat, precise local cleaning and drying are sequentially carried out on the coated ceramic wall with the coating layer thermally sprayed.

[0011] Preferably, in Step 2, during the process of thermally spraying the coating layer on the first thermal spraying surface, it is detected whether the second thermal spraying surface bends.

[0012] In Step 3, during the process of thermally spraying the coating layer on the second thermal spraying surface, it is detected whether the first thermal spraying surface with the coating layer thermally sprayed bends. After the coating layer is thermally sprayed on the second thermal spraying surface, it is detected again whether the second thermal spraying surface with the coating layer thermally sprayed bends.

[0013] The present application also provides a thermal spraying film coating device for ceramic workpieces, based on the above-mentioned regenerative surface treatment method for thermal spraying film coating of ceramic workpieces, including:

[0014] A machine base, a cleaning mechanism arranged on the machine base and used for cleaning the ceramic rotor, a thermal spraying mechanism arranged on the machine base and used for thermally spraying a film coating layer on the outer surface of the blades of the ceramic rotor, at least two shielding mechanisms arranged in the thermal spraying mechanism and used for shielding and cooling the side walls on both sides of the blades, a grinding mechanism arranged in the thermal spraying mechanism and used for grinding the film coating layer flat, a support mechanism movably arranged between the cleaning mechanism and the thermal spraying mechanism and used for supporting the rotating shaft on the ceramic rotor, and a conveying mechanism arranged outside the machine base and used for positioning and conveying the ceramic rotor onto the support mechanism;

[0015] The support mechanism includes a conveying component arranged on the machine base, a support component arranged on the conveying component and moving up and down and rotating, and used for supporting the shaft hole on the rotating shaft, an upper shielding plate arranged on the conveying component and used for shielding the upper surface of the rotating shaft, and a lower shielding plate arranged on the conveying component and moving up and down and rotating, and used for shielding the lower surface of the rotating shaft.

[0016] Preferably, the thermal spraying mechanism includes a support frame arranged on the machine base, a first mounting frame movably arranged along the radial direction on the support frame, two thermal spraying guns rotatably arranged on the first mounting frame and respectively always facing the inner side walls between adjacent two blades, and a driving component arranged on the first mounting frame and used for driving the two thermal spraying guns to rotate simultaneously.

[0017] Preferably, the two shielding mechanisms are respectively arranged on both sides of the first mounting frame, so as to respectively shield the outer side walls between adjacent two blades;

[0018] The shielding mechanism includes a second mounting frame movably arranged on the support frame along the radial direction and in the up and down direction, two baffles arranged on the second mounting frame and respectively abutting against the upper shielding plate and the lower shielding plate, a shielding soft film arranged between the two baffles and used for shielding the side wall of the blade and the outer wall of the rotating shaft, and a cooling component arranged between the two baffles and used for cooling the blade through the shielding soft film.

[0019] Preferably, the temperature reduction assembly includes a support column rotatably and movably arranged on the second mounting bracket, a first fitting wall arranged on one side of the support column and used for supporting the shielding soft film to fit on the side wall of the blade without the coating layer, a second fitting wall arranged on the other side of the support column and used for supporting the shielding soft film to fit on the side wall of the blade with the coating layer, a temperature reduction channel arranged inside the support column and used for circulating and introducing a temperature reduction liquid, an elastic member arranged on the second mounting bracket and used for forcing the support column to move towards the blade, and a pressure sensor arranged on the second mounting bracket and used for sensing the elastic force of the elastic member.

[0020] Preferably, the driving assembly includes two transmission gears respectively arranged on the two spraying guns and a driving rack movably arranged on the first mounting bracket and meshed with the two transmission gears on both sides respectively.

[0021] Preferably, the grinding mechanism includes two third mounting brackets movably arranged along the radial direction on the support frame, a grinding roller rotatably arranged on one of the third mounting brackets and used for grinding the upper and lower ends of the blade, and a polishing roller rotatably arranged on the other third mounting bracket and used for polishing the upper and lower ends of the blade.

[0022] Preferably, the conveying mechanism includes a conveying assembly arranged outside the machine base, two guiding plates respectively arranged on both sides of the conveying assembly and used for guiding the ceramic rotor to the middle of the conveying assembly, and a positioning plate arranged between the two guiding plates, and the positioning plate is inserted between two adjacent blades and abuts against the side walls of the two blades, so as to position the shaft hole.

[0023] Preferably, the support assembly includes a support rod movably arranged up and down, a plurality of support blocks movably arranged at equal intervals along the circumference of the shaft hole and radially on the support rod, and a push rod movably arranged up and down inside the support rod and slidably connected to the push groove on the support block, so that the support block moves radially inwards or outwards along with the movement of the push rod.

[0024] Advantages of the present invention:

[0025] (1) In the present invention, after the ceramic workpiece is loaded and the non-sprayed surface is shielded, the sprayed surface is accurately cleaned and dried in sequence through the cleaning process, reducing the cleaning difficulty and the use of cleaning liquid. Then, during the spraying and coating process of the first spraying process and the second spraying process, the first sprayed surface and the second sprayed surface on both sides of the coated ceramic wall are sprayed and coated step by step, facilitating the cooling of the coated ceramic wall during the spraying process, avoiding deformation or fracture of the relatively thin coated ceramic wall caused by excessive temperature change, and at the same time facilitating the detection of the coated ceramic wall during the spraying process. According to the detection result, the spraying process can be stopped in time, avoiding both product quality problems and waste of spraying materials. Finally, after the spraying and coating is completed, after the splicing joints on the coating layer are polished smoothly in the polishing process, the outer surface of the coating layer is accurately cleaned and dried in sequence, further reducing the cleaning difficulty and the use of cleaning liquid, and then the production is completed and the product is discharged. The processing method of spraying and coating is good.

[0026] (2) In the present invention, after the support mechanism is set to support the ceramic rotor on the conveying mechanism, and the upper shielding plate and the lower shielding plate are used to shield the non-sprayed surfaces on the upper and lower surfaces of the rotating shaft respectively, the moving support assembly can be used to make the ceramic rotor enter the cleaning mechanism for the above-mentioned cleaning process. And the rotation of the ceramic rotor with the support assembly makes the cleaning more comprehensive and easier to dry after centrifugal dehydration. At the same time, moving and rotating the support assembly enables the ceramic rotor to better cooperate with the spraying mechanism, the shielding mechanism and the polishing mechanism for the above-mentioned first spraying process, second spraying process and polishing process. The structure is reasonable, facilitating the cleaning operation of the ceramic rotor and the spraying and coating processing, with high production automation and high spraying accuracy.

[0027] (3) In the present invention, by setting the baffle and the shielding soft film to move radially along the second mounting frame to between two adjacent blades, the baffle and the shielding soft film can shield the other side of the blade away from the spraying mechanism. At the same time, with the auxiliary movement and rotation of the support column, the first fitting wall and the second fitting wall can be used to support the shielding soft film to further fit the uncoated and coated blades. Then, during the process of the spraying mechanism spraying and coating one side of the blade, by circulating the cooling liquid into the cooling channel in the support column, the blade can be quickly cooled from the other side, with good cooling effect. And when the blade bends during the spraying and coating process, the support column attached to the blade will quickly move out of position and force the elastic member to deform, causing the pressure value sensed by the pressure sensor to change, realizing rapid detection, making the processing method of spraying and coating better and more complete.

[0028] In summary, the spraying and coating processing method and equipment have the effects of good processing method, low temperature change and high yield, and are particularly suitable for the technical field of spraying and coating. Description of the Drawings

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic flow chart of a regenerative surface treatment method for thermal spraying coating of ceramic workpieces provided by the present invention.

[0031] Figure 2 It is a perspective view of a thermal spraying coating device for ceramic workpieces provided by the present invention.

[0032] Figure 3 It is a perspective sectional view of a thermal spraying coating device for ceramic workpieces provided by the present invention.

[0033] Figure 4 It is a schematic structural diagram of a support mechanism provided by the present invention.

[0034] Figure 5 It is a perspective sectional view of a support component provided by the present invention.

[0035] Figure 6 It is a schematic structural diagram of a thermal spraying mechanism provided by the present invention.

[0036] Figure 7 Provided by the present invention Figure 6 Partial enlarged view at A in

[0037] Figure 8 Provided by the present invention Figure 6 Partial enlarged view at B in

[0038] Figure 9 Provided by the present invention Figure 6 Partial enlarged view at C in

[0039] Figure 10 It is a sectional view of two shielding mechanisms provided by the present invention.

[0040] Figure 11 Provided by the present invention Figure 6 Partial enlarged view at D in

[0041] Figure 12 It is a schematic structural diagram of a conveying mechanism provided by the present invention.

[0042] Figures 13 - 15 It is a state diagram during the thermal spraying coating process of a ceramic rotor provided by the present invention.

[0043] Figure 16 It is a perspective view of a ceramic rotor provided by the present invention. Detailed implementation mode

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0045] Embodiment 1

[0046] As Figure 1 and Figures 13 - 16 shown, a regenerative surface treatment method for thermal spraying coating of ceramic workpieces includes the following steps:

[0047] Step 1: Cleaning process. After masking the non-thermal spraying surface of the ceramic workpiece, the exposed ceramic wall is the coated ceramic wall and its surface is the thermal spraying surface. Then, precise local cleaning and drying are carried out on the thermal spraying surface in sequence.

[0048] Step 2: First thermal spraying process. A coating layer 83 is thermally sprayed on the first thermal spraying surface 821 on one side of the coated ceramic wall. Before thermally spraying the first thermal spraying surface 821, the second thermal spraying surface 822 on the other side of the coated ceramic wall is masked to facilitate cooling the coated ceramic wall through the second thermal spraying surface 822.

[0049] Step 3: Second thermal spraying process. A coating layer 83 is thermally sprayed on the second thermal spraying surface 822. Before thermally spraying the second thermal spraying surface 822, the coating layer 83 on the second thermal spraying surface 822 is masked so that the coating layers 83 on the first thermal spraying surface 821 and the second thermal spraying surface 822 can be spliced with each other. At the same time, it is convenient to cool the coated ceramic wall through the first thermal spraying surface 821.

[0050] Step 4: Grinding process. After grinding the splicing joint 831 between the coating layers 83 on the first thermal spraying surface 821 and the second thermal spraying surface 822 to be flat, precise local cleaning and drying are carried out on the coated ceramic wall with the coating layer 83 in sequence.

[0051] It should be noted that after the ceramic workpiece after loading is subjected to thermal spraying coating through the cleaning process, the first thermal spraying process, and the second thermal spraying process, and the splicing joint 831 between the coating layers 83 is ground flat in step 4, the ceramic workpiece re-enters the cleaning process to be cleaned and dried in sequence, and then the production is completed and the product is discharged.

[0052] Furthermore, as Figure 1 and Figures 13 - 16 shown, in step 2, during the process of thermally spraying the coating layer 83 on the first thermal spraying surface 821, it is detected whether the second thermal spraying surface 822 is bent;

[0053] In Step 3, during the process of spraying the coating layer 83 on the second spraying surface 822, it is detected whether the first spraying surface 821 with the coating layer 83 sprayed thereon is bent. After the coating layer 83 is sprayed on the second spraying surface 822, the second spraying surface 822 with the coating layer 83 sprayed thereon is detected again to check for bending.

[0054] In this embodiment, by detecting the coated ceramic wall during the spraying process and promptly stopping the spraying process according to the detection results, not only can product quality problems be avoided, but also waste of spraying materials can be avoided.

[0055] Embodiment 2

[0056] As Figures 1 - 4 and Figures 13 - 16 shown, a ceramic workpiece spraying and coating device, based on the above-mentioned regenerative surface treatment method for spraying and coating a ceramic workpiece, includes:

[0057] A machine base 1, a cleaning mechanism 2 disposed on the machine base 1 and used for cleaning the ceramic rotor 8, a spraying mechanism 3 disposed on the machine base 1 and used for spraying a coating layer 83 on the outer surface of the blades 82 of the ceramic rotor 8, at least two shielding mechanisms 4 disposed in the spraying mechanism 3 and used for shielding and cooling the two side walls of the blades 82, a grinding mechanism 5 disposed in the spraying mechanism 3 and used for grinding the coating layer 83 flat, a supporting mechanism 6 movably disposed between the cleaning mechanism 2 and the spraying mechanism 3 and used for supporting the rotating shaft 81 on the ceramic rotor 8, and a conveying mechanism 7 disposed outside the machine base 1 and used for positioning and conveying the ceramic rotor 8 onto the supporting mechanism 6;

[0058] The supporting mechanism 6 includes a conveying component 61 disposed on the machine base 1, a supporting component 62 that moves up and down and rotates on the conveying component 61 and is used for supporting the shaft hole 811 on the rotating shaft 81, an upper shielding plate 63 disposed on the conveying component 61 and used for shielding the upper surface of the rotating shaft 81, and a lower shielding plate 64 that moves up and down and rotates on the conveying component 61 and is used for shielding the lower surface of the rotating shaft 81.

[0059] In this embodiment, after the supporting mechanism 6 is set to support the ceramic rotor 8 on the conveying mechanism 7, and the upper shielding plate 63 and the lower shielding plate 64 are used to shield the non-spraying surfaces of the upper and lower surfaces of the rotating shaft 81 respectively, the supporting component 62 can be moved and rotated so that the ceramic rotor 8 (i.e., the above-mentioned ceramic workpiece) can undergo the above-mentioned cleaning process, first spraying process, second spraying process, and grinding process through the cleaning mechanism 2, spraying mechanism 3, shielding mechanism 4, and grinding mechanism 5. The structure is reasonable, facilitating the cleaning operation and spraying and coating processing of the ceramic rotor 8, with high production automation and high spraying accuracy.

[0060] Specifically, during use, the conveying mechanism 7 positions and conveys the ceramic rotor 8 directly below the supporting mechanism 6. The supporting assembly 62 moves downward until the upper shielding plate 63 shields the upper surface of the rotating shaft 81 and then supports the shaft hole 811. Then, the ceramic rotor 8 is lifted upward, and the lower shielding plate 64 moves upward until it shields the lower surface of the rotating shaft 81. Then, the ceramic rotor 8 is sequentially moved into the cleaning mechanism 2 and the thermal spraying mechanism 3 through the conveying assembly 61. The supporting assembly 62 and the lower shielding plate are rotated to make the ceramic rotor 8 rotate and cooperate, so that the cleaning is more comprehensive and it is easier to dry after centrifugal dehydration. At the same time, it is convenient to perform thermal spraying and film coating on each blade 82 and then polish it. Finally, the polished ceramic rotor 8 is conveyed into the cleaning mechanism 2 through the conveying assembly 61 for re-cleaning, and then the thermal spraying and film coating production is completed.

[0061] It should be noted that the machine base 1 is provided with a housing 11 that separates the cleaning mechanism 2 and the thermal spraying mechanism 3, ensuring the cleanliness of the environment during production and avoiding cross-contamination in each production process.

[0062] The cleaning mechanism 2 cleans the ceramic rotor 8 and the supporting mechanism 6 by spraying cleaning liquid and clean water. The conveying assembly 61 is a rail conveying structure. The cleaning mechanism 2 and the conveying assembly 61 themselves and their installation methods are all prior arts and will not be described in detail here.

[0063] In addition, the blade 82 is the above-mentioned film-coated ceramic wall, the surface of the blade 82 is the thermal spraying surface, and the two sides of the blade 82 are the above-mentioned first thermal spraying surface 821 and the second thermal spraying surface 822 respectively.

[0064] Furthermore, as Figures 6 - 7 shown, the thermal spraying mechanism 3 includes a support frame 31 arranged on the machine base 1, a first mounting frame 32 movably arranged along the radial direction on the support frame 31, two thermal spraying guns 33 rotatably arranged on the first mounting frame 32 and respectively always facing the inner side walls between adjacent two blades 82, and a driving assembly 34 arranged on the first mounting frame 32 and used to drive the two thermal spraying guns 33 to rotate simultaneously.

[0065] In this embodiment, by setting the movable first mounting frame 32 and cooperating with the driving assembly 34 to drive the two thermal spraying guns 33 to always face the inner side walls between adjacent two blades 82, complete thermal spraying and film coating of the thermal spraying surface is achieved, and at the same time, the film-coated layer 83 produced by film coating has a better effect and higher flatness.

[0066] Specifically, during use, the thermal spraying guns 33 move radially inwards along with the first mounting bracket 32 to between the two blades 82, and the driving assembly 34 drives the two thermal spraying guns 33 towards the outer wall of the rotating shaft 81. Then, during the process of thermal spraying the coating film, the driving assembly 34 drives the two thermal spraying guns 33 to rotate and spray a thermal spraying layer on the side walls of the two blades 82 respectively. At the same time, the first mounting bracket 32 is moved so that the distances between the thermal spraying guns 33 and the outer wall of the rotating shaft 81 and the side walls of the blades 82 are always within a certain range, improving the thermal spraying coating effect. Finally, the support assembly 62 and the lower shielding plate 64 are moved up or down so that the ceramic rotor 8 moves up or down, and the driving assembly 34 drives the thermal spraying guns 33 through the first mounting bracket 32 to spray another thermal spraying layer connected to the previous thermal spraying layer again. This process is repeated to complete the thermal spraying coating of the thermal spraying surface.

[0067] It should be noted that the principle of the thermal spraying gun 33 spraying the coating layer 83 and the thermal spraying gun itself are both prior arts, and will not be elaborated in detail here.

[0068] Furthermore, as Figure 6 and Figures 8 - 10 shown, the two shielding mechanisms 4 are respectively arranged on both sides of the first mounting bracket 32, and thus respectively shield the outer side walls between adjacent two blades 82;

[0069] The shielding mechanism 4 includes a second mounting bracket 41 movably arranged on the support frame 31 along the radial direction and the up and down direction, two baffles 42 arranged on the second mounting bracket 41 and respectively abutted against the upper shielding plate 63 and the lower shielding plate 64, a shielding soft film 43 arranged between the two baffles 42 and used for shielding the side wall of the blade 82 and the outer wall of the rotating shaft 81, and a cooling component 44 arranged between the two baffles 42 and used for cooling the blade 82 through the shielding soft film 43.

[0070] In this embodiment, by arranging the baffle 42, the shielding soft film 43 and the cooling component 44 to move along with the second mounting bracket 41, the other side of the blade 82 far from the thermal spraying gun 33 can be shielded and cooled. Moreover, the shielding soft film 43 has a certain deformation ability, so that it can fit better with the uncoated blade 82 and the coated blade 82, improving the shielding effect and the cooling effect.

[0071] It should be noted that the two baffles 42 on the shielding mechanism 4 are connected to each other and both extend towards the direction of the first mounting bracket 32. And when the two shielding mechanisms 4 respectively shield the outer sides of adjacent two blades 82, the four baffles 42 on the two shielding mechanisms 4 cooperate with each other to form a shielding area 421 for shielding the two blades 82, thereby avoiding the dust ejected by the thermal spraying gun 33 from leaking out and adhering to other blades 82 during thermal spraying coating, which affects the subsequent thermal spraying production;

[0072] In addition, the shielding soft film 43 is made of the same material as the high-temperature resistant shielding tape or the high-temperature resistant masking tape, which is a prior art and will not be elaborated in detail here.

[0073] Furthermore, as Figures 8 - 10 shown, the temperature reduction assembly 44 includes a support column 441 rotatably and movably arranged on the second mounting bracket 41, a first fitting wall 442 arranged on one side of the support column 441 and used to support the shielding soft film 43 to fit against the side wall of the blade 82 without the coating layer 83, a second fitting wall 443 arranged on the other side of the support column 441 and used to support the shielding soft film 43 to fit against the side wall of the blade 82 with the coating layer 83, a temperature reduction channel 444 arranged inside the support column 441 and used to circulate and introduce a temperature reduction liquid, an elastic member 445 arranged on the second mounting bracket 41 and used to force the support column 441 to move towards the blade 82, and a pressure sensor 446 arranged on the second mounting bracket 41 and used to sense the elastic force of the elastic member 445.

[0074] In this embodiment, by providing the movable and rotatable support column 441, the first fitting wall 442 and the second fitting wall 443 are coordinated to support the shielding soft film 43 to further fit against the uncoated blade 82 and the coated blade 82. The temperature reduction liquid is circulated through the temperature reduction channel 444, and the shielding soft film 43 supported by the first fitting wall 442 or the second fitting wall 443 has a better temperature reduction effect on the blade 82. At the same time, the support column 441 fitting against the blade 82 cooperates with the pressure sensor 446 to sense the change in the elastic force of the elastic member 445, so as to detect whether the blade 82 is bent during the thermal spraying and coating process.

[0075] Specifically, during use, the second mounting bracket 41 is moved radially inwards until the shielding soft film 43 shields the uncoated blade 82. Then, according to whether the shielded blade 82 has a coating layer 83, the support column 441 is rotated to adjust the orientations of the first fitting wall 442 and the second fitting wall 443. After that, the support column 441 moves towards the blade 82, and the first fitting wall 442 or the second fitting wall 443 can support the shielding soft film 43 to fit more closely against one side of the blade 82 with or without the coating layer 83. Furthermore, when thermal spraying and coating the other side of the blade 82, the temperature reduction liquid is circulated through the temperature reduction channel 444, so as to quickly cool the shielding soft film 43 fitting against the blade 82 through the first fitting wall 442. And when the elastic member 445 deforms to force the pressure sensor 446 to sense the pressure change, it can be detected that the blade 82 is bent during the thermal spraying and coating process.

[0076] It should be noted that the elastic member 445 is a helical spring, a leaf spring, etc., and the elastic member 445 and the pressure sensor 446 themselves and their installation methods are all prior arts and will not be elaborated in detail here.

[0077] Further, as Figure 7 shown, the driving assembly 34 includes two transmission gears 341 respectively arranged on two thermal spraying guns 33, and a driving rack 342 movably arranged on the first mounting bracket 32 and meshing with the two transmission gears 341 on both sides respectively.

[0078] In this embodiment, by arranging the driving rack 342, the two thermal spraying guns 33 can be simultaneously driven to rotate in opposite directions respectively along with the two transmission gears 341.

[0079] Further, as Figure 6 and Figure 11 shown, the grinding mechanism 5 includes two third mounting brackets 51 movably arranged on the support frame 31 along the radial direction, a grinding roller 52 rotatably arranged on one third mounting bracket 51 and used for grinding the upper and lower ends of the blade 82, and a polishing roller 53 rotatably arranged on the other third mounting bracket 51 and used for polishing the upper and lower ends of the blade 82.

[0080] In this embodiment, by arranging the grinding roller 52 and the polishing roller 53 to move along the radial direction along with the second mounting bracket 41, and cooperating with the moving support assembly 62 and the lower shielding plate 64, the grinding roller 52 and the polishing roller 53 can be moved above, below or outside the ceramic rotor 8, so as to grind and then polish the splicing part 831 between the two coating layers 83 on both sides of the blade 82, making the surface of the coating layer 83 flat and smooth.

[0081] It should be noted that the driving structures for driving the two second mounting brackets 41 and the two third mounting brackets 51 to move along the radial direction are the same. The following only provides one structure for reference:

[0082] It includes a driving disk 54 rotatably arranged on the support frame 31, two driving grooves 55 arranged on the driving disk 54, and two driving rods 56 with one end respectively connected to the second mounting bracket 41 or the third mounting bracket 51 and the other end slidably connected to the driving grooves 55. Thus, by rotating the driving disk 54, the two second mounting brackets 41 or the two third mounting brackets 51 can be simultaneously driven to move along the radial direction at the same time through the two driving grooves 55 and the two driving rods 56.

[0083] Further, as Figure 2 and Figure 12 shown, the conveying mechanism 7 includes a conveying component 71 arranged outside the machine base 1, two guiding plates 72 respectively arranged on both sides of the conveying component 71 and used for guiding the ceramic rotor 8 to the middle of the conveying component 71, and a positioning plate 73 arranged between the two guiding plates 72. The positioning plate 73 is inserted between two adjacent blades 82 and abuts against the side walls of the two blades 82, so as to position the shaft hole 811.

[0084] In this embodiment, the positions of the blades 82 and the shaft hole 811 of the ceramic rotor 8 are located by arranging the conveying assembly 71 in cooperation with the guide plate 72 and the positioning plate 73, which facilitates the subsequent support of the support assembly 62 and the thermal spraying coating on the positioned blades 82.

[0085] Specifically, during use, when the conveying assembly 71 conveys the ceramic rotor 8, the guide plate 72 pushes the ceramic rotor 8 to the middle of the conveying assembly 71. Then, during the continuous conveyance of the ceramic rotor 8 by the conveying assembly 71, the positioning plate 73 is inserted between two adjacent blades 82. Furthermore, the positioning plate 73 pushes the conveyed ceramic rotor 8 to move until the positioning plate 73 abuts against the side wall between two adjacent blades 82, thereby positioning the blades 82 and simultaneously locating the position of the conveying shaft hole 811.

[0086] It should be noted that the guide plate 72 and the positioning plate 73 are movably arranged on the conveying assembly 71. When the guide plate 72 and the positioning plate 73 move away from the support mechanism 6, the conveying assembly 71 discharges the ceramic rotor 8 after the coating is completed.

[0087] In addition, the conveying assembly 71 is a conveyor belt, which is a prior art and will not be elaborated in detail here.

[0088] Furthermore, as Figure 5 shown, the support assembly 62 includes a support rod 621 movably arranged up and down, a plurality of support blocks 622 arranged on the support rod 621 at equal intervals in the circumferential direction of the shaft hole 811 and movably arranged radially, and a push rod 624 movably arranged up and down in the support rod 621 and slidably connected to the push groove 623 on the support block 622, so that the support block 622 moves radially inwards or outwards along with the movement of the push rod 624.

[0089] In this embodiment, by arranging the push rod in cooperation with the push groove 623, the support block 622 can be pushed to move radially inwards or outwards, thereby supporting the inner wall of the shaft hole 811.

[0090] Specifically, during support, when the support rod 621 moves downwards until the upper shielding plate 63 shields the upper surface of the rotating shaft 81, the push rod 624 moves downwards and pushes a plurality of support blocks 622 to move radially outwards simultaneously through the push groove 623 until the inner wall of the support shaft hole 811 is supported.

[0091] It should be noted that one side of the support block 622 that supports the inner wall of the shaft hole 811 is made of a soft material, which can not only improve the stability of the support through deformation but also avoid damaging the inner wall of the shaft hole 811 due to extrusion.

[0092] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the invention.

[0093] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0094] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art in the technical disclosure of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for regenerating the surface of a ceramic workpiece by thermal spray coating, characterized in that: The following steps are involved: Step 1: Cleaning process, after the non-sprayed surface of the ceramic workpiece is masked, the exposed ceramic wall is the coated ceramic wall and its surface is the sprayed surface, so the sprayed surface can be precisely cleaned and dried in turn; Step 2: a first spraying process, in which a coating layer is sprayed on a first spraying surface on one side of the coated ceramic wall, and before spraying the first spraying surface, a second spraying surface on the other side of the coated ceramic wall is shielded to facilitate cooling the coated ceramic wall through the second spraying surface, and in the process of spraying the coating layer on the first spraying surface, whether the second spraying surface is bent is detected; Step 3: a second spraying process, spraying the coating layer on the second spraying surface, and before spraying the second spraying surface, shielding the coating layer on the first spraying surface, so that the first spraying surface and the coating layer on the second spraying surface can be spliced ​​with each other, and at the same time, it is convenient to cool the coated ceramic wall through the first spraying surface, and in the process of spraying the coating layer on the second spraying surface, detecting whether the first spraying surface on which the coating layer is sprayed is bent, and after spraying the coating layer on the second spraying surface, re-detecting whether the second spraying surface on which the coating layer is sprayed is bent; Step 4: grinding process, after grinding the joint between the first sprayed surface and the coating layer on the second sprayed surface to be smooth, the coated ceramic wall sprayed with the coating layer is locally cleaned and dried in sequence; The above-mentioned ceramic workpiece spray coating regeneration surface treatment method adopts the following ceramic workpiece spray coating regeneration surface treatment equipment, which includes: A machine base, a cleaning mechanism disposed on the machine base and used for cleaning the ceramic rotor, a spraying mechanism disposed on the machine base and used for spraying a coating layer on the outer surface of the blades of the ceramic rotor, at least two shielding mechanisms disposed in the spraying mechanism and used for shielding and cooling the side walls of the blades, a polishing mechanism disposed in the spraying mechanism and used for polishing the coating layer, a supporting mechanism movably disposed between the cleaning mechanism and the spraying mechanism and used for supporting the rotating shaft on the ceramic rotor, and a conveying mechanism disposed outside the machine base and used for positioning and conveying the ceramic rotor to the supporting mechanism; The support mechanism includes a transmission assembly disposed on the machine base, a support assembly disposed on the transmission assembly to move up and down and rotate and used to support the shaft hole on the rotating shaft, an upper shielding plate disposed on the transmission assembly to shield the upper surface of the rotating shaft, and a lower shielding plate disposed on the transmission assembly to move up and down and rotate and used to shield the lower surface of the rotating shaft; The spraying mechanism comprises a support frame arranged on the machine base, a first mounting frame arranged on the support frame to move radially, two spraying guns rotatably arranged on the first mounting frame and always facing the inner side wall between two adjacent blades, and a driving assembly arranged on the first mounting frame and used to drive the two spraying guns to rotate simultaneously; The two shielding mechanisms are respectively arranged on both sides of the first mounting frame, so as to respectively shield the outer side walls between two adjacent blades; The shielding mechanism includes a second mounting frame movably arranged on the support frame in the radial direction and in the up-down direction, two baffles arranged on the second mounting frame and respectively abutting against the upper shielding plate and the lower shielding plate, a shielding soft film arranged between the two baffles and used to shield the side wall of the blade and the outer wall of the rotating shaft, and a cooling component arranged between the two baffles and used to cool the blade through the shielding soft film; The cooling component includes a support column rotatably and movably arranged on a second mounting frame, a first fitting wall arranged on one side of the support column and used to support the shielding soft film to fit the side wall of the blade without a coating layer, a second fitting wall arranged on the other side of the support column and used to support the shielding soft film to fit the side wall of the blade with the coating layer, a cooling channel arranged in the support column and used to circulate a cooling liquid, an elastic member arranged on the second mounting frame and used to force the support column to move toward the blade, and a pressure sensor arranged on the second mounting frame and used to sense the elastic force of the elastic member.

2. A method for regenerating surface treatment of a ceramic workpiece by thermal spray coating according to claim 1, characterized in that: The driving assembly includes two transmission gears respectively arranged on the two spray guns and a driving rack movably arranged on the first mounting frame and respectively meshed with the two transmission gears on both sides.

3. The method for regenerating surface of a ceramic workpiece by thermal spray coating according to claim 1, characterized in that: The grinding mechanism includes two third mounting frames radially movably arranged on the support frame, a grinding roller rotatably arranged on one of the third mounting frames and used for grinding the upper and lower ends of the blade, and a polishing roller rotatably arranged on the other third mounting frame and used for polishing the upper and lower ends of the blade.

4. The method for regenerating the surface of a ceramic workpiece by thermal spray coating according to claim 1, characterized in that: The conveying mechanism includes a conveying assembly arranged outside the machine base, two guide plates respectively arranged on both sides of the conveying assembly and used to guide the ceramic rotor to the middle of the conveying assembly, and a positioning plate arranged between the two guide plates, and the positioning plate is inserted between two adjacent blades and abuts against the side walls of the two blades, thereby positioning the shaft hole.

5. The method for regenerating surface of a ceramic workpiece by thermal spray coating according to claim 1, characterized in that: The support assembly includes a support rod that is movably arranged up and down, a plurality of support blocks that are evenly spaced along the circumference of the axial hole and are radially movable on the support rod, and a push rod that is movably arranged inside the support rod and is slidably connected to a push groove on the support block, so that the support block moves radially inward or outward along with the movement of the push rod.

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