A metal surface ceramic coating processing device and a processing method

Abstract

This invention discloses a ceramic coating processing device and method for metal surfaces, belonging to the field of metal surface processing technology. It includes a base frame, a rotating frame, and a workpiece support mechanism. The rotating frame has limiting rings on the left and right sides, with limiting grooves on the inner side of the limiting rings. Centrifugal rolling bearings are installed at both ends of the workpiece support mechanism, and limiting seats are provided on the left and right sides of the base frame. It also includes a ceramic feeding device, an ignition device, and a pressure roller located on the upper side of the workpiece. The overall structure and process flow are simple, convenient to use, and highly practical. It fully utilizes the heat released by the aluminothermic reaction itself, eliminating the need for external heat sources. The reaction speed is relatively fast, and the high temperature can evaporate volatile impurities. The self-ignition high-temperature synthesis can continue for a period of time, providing sufficient thermal energy to promote a more complete metallurgical bond between the ceramic coating and the metal substrate, thereby improving the bonding strength between the ceramic coating and the metal substrate, the cohesive strength of the ceramic coating, and the surface precision of the ceramic coating.

Description

Technical Field

[0001] This invention belongs to the field of metal surface processing technology, specifically a metal surface ceramic coating processing device and processing method. Background Technology

[0002] In industrial production, ordinary metal surfaces are no longer sufficient to meet the requirements for long-term use in harsh environments such as high temperature, high pressure, corrosion, and wear. Applying a wear-resistant coating to metal surfaces allows the synthesized composite material to retain the strength and toughness of the metal while also possessing the wear resistance, corrosion resistance, and high temperature resistance of the coating, thus significantly improving the material's performance.

[0003] Currently, commonly used industrial methods for preparing composite coatings include: autogenous combustion high-temperature synthesis, thermal spraying, and sol-gel methods. Autogenous combustion high-temperature synthesis uses the high heat of chemical reaction generated between reactants to induce a continuous, spontaneous chemical reaction to prepare ceramic coatings. While this single method can produce high-performance composite coatings, the resulting coatings have poor surface precision, exhibiting unevenness and voids. Thermal spraying technology involves melting and atomizing the coating material at high temperatures, forming or semi-molten particle streams, which are then sprayed onto the surface of a metal plate at extremely high speeds. This method can produce coatings with good wear resistance, hardness, and thermal conductivity, and has minimal impact on the thermal deformation of the steel plate; however, the bonding strength with the metal substrate is relatively low. The sol-gel method involves reacting easily hydrolyzed metal alkoxides or inorganic salts with water in a solvent to form a sol through hydrolysis and condensation. The sol is then coated onto the surface of a metal steel plate, followed by drying and heat treatment to form a coating. The resulting coating is of high quality, but the process is complex, time-consuming, and the film is prone to cracking.

[0004] Existing methods for preparing composite coatings on metal surfaces cannot achieve high bonding strength between the composite coating and the metal substrate, high surface precision, or a simple process. Summary of the Invention

[0005] To address the shortcomings of existing methods for preparing composite coatings on metal surfaces, which fail to achieve high bonding strength, high surface precision, and a simple process flow between the composite coating and the metal substrate, this invention provides a metal surface ceramic coating processing apparatus and method.

[0006] This invention is achieved, in one respect, through the following technical solution: A ceramic coating processing device for metal surfaces includes a base frame, a rotating frame mounted on the base frame, and a workpiece support mechanism capable of supporting the lower side of a workpiece. Limiting rings are provided at both ends of the rotating frame, and annular limiting grooves are formed inside the limiting rings. Centrifugal rolling bearings capable of being installed in the limiting grooves are mounted at both ends of the workpiece support mechanism. Limiting seats capable of limiting the forward and backward movement of the centrifugal rolling bearings are provided on both sides of the base frame. The device also includes a ceramic feeding device and an ignition device located on the upper side of the workpiece and corresponding to the support position of the workpiece support mechanism. A pressure roller capable of pressing the ceramic coating is provided on one side of the ceramic feeding device in the workpiece conveying direction.

[0007] A further improvement of the present invention is that the workpiece support mechanism includes a support frame capable of positioning and supporting the inner side of the cylindrical workpiece, and centrifugal rolling bearings are installed at both ends of the support frame.

[0008] A further improvement of the present invention includes a cylindrical workpiece driving device that is connected to the central shaft of the support frame.

[0009] A further improvement of the present invention is that the workpiece support mechanism includes a central rotating roller capable of rolling support for the lower side of the plate workpiece, and centrifugal rolling bearings are installed at both ends of the central rotating roller; a conveying roller capable of rolling support for the plate workpiece is installed on the base frame.

[0010] A further improvement of the present invention includes a plate workpiece drive device capable of feeding plate workpieces.

[0011] A further improvement of the present invention is that the limiting seat is a channel steel structure with an opening at the top.

[0012] A further improvement of the present invention is that the pressure roller has an eccentric wheel structure, and a pressure roller power device is connected to its mounting shaft.

[0013] A further improvement of the present invention is that the outer ring of the pressure roller is provided with a roller pressing layer.

[0014] Another aspect of the present invention is achieved through the following technical solution: A method for processing ceramic coatings on metal surfaces includes the following steps: S1: Ceramic coating process on the outer surface of cylindrical workpieces; The ceramic feeding device delivers ceramic material to the top of the cylindrical workpiece. After the ignition device is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion and exothermic reaction at the top of the cylindrical workpiece, and heat melts the top surface of the cylindrical workpiece. The rotating frame is driven to rotate, and the centrifugal rolling bearing is limited in the front and rear directions by the limiting seat, and the centrifugal rolling bearing is limited in the radial direction by the limiting groove, so that the support frame is always at the bottom position of the rotating frame, and the cylindrical workpiece supported by the support frame has a vertically downward centrifugal force. Under the action of centrifugal force, a metal layer, a metal + ceramic transition layer, and a ceramic layer are formed sequentially from the top surface of the cylindrical workpiece to its outer edge. The cylindrical workpiece is fed to rotate by the cylindrical workpiece drive device, and the surface of the coated cylindrical workpiece is forged by the eccentric pressure roller to achieve uniformity and surface precision of the ceramic coating. S2: Ceramic coating process for plate workpiece surfaces; The conveying roller and the central rotating roller provide rolling support for the plate workpiece. The ceramic feeding device conveys ceramic material to the upper surface of the plate workpiece. After the ignition device is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion and exothermic reaction on the upper surface of the plate workpiece, and heat melts the upper surface of the plate workpiece. The rotating frame is driven to rotate, and the centrifugal rolling bearing is limited in the front and rear directions by the limiting seat, and the centrifugal rolling bearing is limited in the radial direction by the limiting groove, so that the central roller is always at the bottom position of the rotating frame, and the plate workpiece supported by the central roller has a vertically downward centrifugal force. Under the action of centrifugal force, a metal layer, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the upper surface of the plate workpiece to its outer edge. The plate workpiece is moved and fed by the plate workpiece drive device, and the upper surface of the coated plate workpiece is forged by the eccentric pressure roller to achieve uniformity and surface precision of the ceramic coating.

[0015] As can be seen from the above technical solutions, the beneficial effects of the present invention are: The overall structure and process are simple, easy to use, and highly practical. It fully utilizes the heat released by the aluminothermic reaction itself. The reaction temperature is high, eliminating the need for external heat sources, and the reaction rate is relatively fast. The high temperature evaporates volatile impurities, resulting in products that are typically of high purity. The self-ignition high-temperature synthesis can be sustained for a period of time, providing sufficient thermal energy to promote a more complete metallurgical bond between the ceramic coating and the metal substrate. This improves the bonding strength between the ceramic coating and the metal substrate, as well as the cohesive strength of the ceramic coating, and enhances the surface finish of the ceramic coating. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the ceramic coating process on the surface of a cylindrical workpiece according to a specific embodiment of the present invention.

[0018] Figure 2 for Figure 1 A magnified schematic diagram of a portion of the structure.

[0019] Figure 3 This is a schematic diagram of the ceramic coating process on the surface of a plate workpiece according to a specific embodiment of the present invention.

[0020] Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure.

[0021] Figure 5 for Figure 3 The main view.

[0022] In the attached diagram: 1. Base frame, 2. Rotating frame, 21. Limiting ring, 22. Base frame support, 3. Feeding device support, 4. Ceramic feeding device, 5. Ignition device, 6. Ignition device support, 7. Pressure roller, 8. Limiting seat, 9. Centrifugal rolling bearing, 10. Central rotating roller, 11. Cylindrical workpiece, 12. Plate workpiece, 13. Conveying roller, 14. Workpiece positioning and clamping roller. Detailed Implementation

[0023] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] like Figures 1-2 As shown, an optional embodiment of the present invention discloses a metal surface ceramic coating processing device, including a base frame 1, a rotating frame 2 mounted on the base frame 1 via a base frame bracket 22, and a workpiece support mechanism capable of supporting the lower side of the workpiece. The rotating frame 2 has limiting rings 21 at its left and right ends, with annular limiting grooves on the inner side of each limiting ring 21. The workpiece support mechanism has centrifugal rolling bearings 9 mounted at both ends, capable of being installed in the limiting grooves. The base frame 1 has limiting seats 8 on its left and right sides, capable of limiting the forward and backward movement of the centrifugal rolling bearings 9. It also includes a ceramic feeding device 4 and an ignition device 5 located on the upper side of the workpiece and corresponding to the support position of the workpiece support mechanism. The ceramic feeding device 4 has a pressure roller 7 on one side in the workpiece conveying direction, capable of pressing the ceramic coating. The workpiece support mechanism includes a support frame capable of positioning and supporting the inner side of a cylindrical workpiece 11, with centrifugal rolling bearings 9 mounted at both ends of the support frame.

[0025] The ceramic feeding device 4 conveys ceramic material to the top of the cylindrical workpiece 11. After the ignition device 5 is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion exothermic reaction at the top of the cylindrical workpiece 11 and heats the top surface of the cylindrical workpiece 11. The rotating frame 2 is driven to rotate. The centrifugal rolling bearing 9 is limited in the front and rear directions by the limiting seat 8, and the centrifugal rolling bearing 9 is limited in the radial direction by the limiting groove, so that the support frame is always at the bottom position of the rotating frame 2, and the cylindrical workpiece 11 supported by the support frame has a vertically downward centrifugal force. Under the action of centrifugal force, a metal, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the top surface of the cylindrical workpiece 11 to the outer edge. The cylindrical workpiece 11 is rotated and fed, and the surface of the coated cylindrical workpiece 11 is pressed by the pressure roller 7 to achieve the uniformity and surface accuracy of the ceramic coating. The overall structure and process are simple, easy to use, and highly practical. It fully utilizes the heat released by the aluminothermic reaction itself. The reaction temperature is high, eliminating the need for external heat sources, and the reaction rate is relatively fast. The high temperature evaporates volatile impurities, resulting in products that are typically of high purity. The self-ignition high-temperature synthesis can be sustained for a period of time, providing sufficient thermal energy to promote a more complete metallurgical bond between the ceramic coating and the metal substrate. This improves the bonding strength between the ceramic coating and the metal substrate, as well as the cohesive strength of the ceramic coating, and enhances the surface finish of the ceramic coating.

[0026] Among them, the ceramic feeding device 4 is a positive pressure pneumatic feeding type, which sprays ceramic material to the ceramic coating position through the positive pressure feeding port; and the feeding speed is equal to the self-propagating reaction propagation speed.

[0027] The ceramic coating processing device for metal surfaces also includes a cylindrical workpiece drive device connected to the central shaft of the support frame. The cylindrical workpiece 11 is rotated by the cylindrical workpiece drive device, and the drive speed is adapted to the feeding speed of the ceramic feeding device 4.

[0028] like Figures 3-5As shown, another optional embodiment of the present invention discloses a metal surface ceramic coating processing device, including a base frame 1, a rotating frame 2 mounted on the base frame 1 via a base frame bracket 22, and a workpiece support mechanism capable of supporting the lower side of the workpiece. The rotating frame 2 has limiting rings 21 at its left and right ends, with annular limiting grooves on the inner side of each limiting ring 21. The workpiece support mechanism has centrifugal rolling bearings 9 mounted at both ends, capable of being installed in the limiting grooves. The base frame 1 has limiting seats 8 on its left and right sides, capable of limiting the forward and backward movement of the centrifugal rolling bearings 9. It also includes a ceramic feeding device 4 and an ignition device 5 located on the upper side of the workpiece and corresponding to the support position of the workpiece support mechanism. The ceramic feeding device 4 has a pressure roller 7 on its workpiece conveying direction side capable of pressing the ceramic coating. The workpiece support mechanism includes a central rotating roller 10 capable of rolling support for the lower side of a plate-shaped workpiece 12, with centrifugal rolling bearings 9 mounted at both ends of the central rotating roller 10. A conveying roller 13 capable of rolling support for the plate-shaped workpiece 12 is mounted on the base frame 1. The center roller 10 is slightly higher than the conveyor roller 13, which ensures that the center roller 10 can transmit sufficient centrifugal force to the plate workpiece 12.

[0029] The conveying roller 13 and the central rotating roller 10 provide rolling support for the plate workpiece 12. The ceramic feeding device 4 conveys ceramic material to the upper surface of the plate workpiece 12. After the ignition device 5 is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion exothermic reaction on the upper surface of the plate workpiece 12 and heats the upper surface of the plate workpiece 12. The rotating frame 2 is driven to rotate. The centrifugal rolling bearing 9 is limited in the front and rear directions by the limiting seat 8, and the centrifugal rolling bearing 9 is limited in the radial direction by the limiting groove, so that the central rotating roller 10 is always at the bottom position of the rotating frame 2, and the plate workpiece 12 supported by the central rotating roller 10 has a vertically downward centrifugal force. Under the action of centrifugal force, a metal, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the upper surface of the plate workpiece 12 to the outer edge. The plate workpiece 12 moves and is fed. The pressure roller 7 presses the upper surface of the coated plate workpiece 12 to achieve the uniformity and surface accuracy of the ceramic coating. The overall structure and process are simple, easy to use, and highly practical. It fully utilizes the heat released by the aluminothermic reaction itself. The reaction temperature is high, eliminating the need for external heat sources, and the reaction rate is relatively fast. The high temperature evaporates volatile impurities, resulting in products that are typically of high purity. The self-ignition high-temperature synthesis can be sustained for a period of time, providing sufficient thermal energy to promote a more complete metallurgical bond between the ceramic coating and the metal substrate. This improves the bonding strength between the ceramic coating and the metal substrate, as well as the cohesive strength of the ceramic coating, and enhances the surface finish of the ceramic coating.

[0030] The metal surface ceramic coating processing device also includes a plate workpiece drive device capable of feeding the plate workpiece 12. The plate workpiece 12 is fed by the plate workpiece drive device, and the driving speed is adapted to the feeding speed of the ceramic feeding device 4.

[0031] Furthermore, the limiting seat is a channel steel structure with an opening at the top. The front and rear sides of the centrifugal rolling bearing 9 are limited by the two side flanges of the channel steel structure.

[0032] The pressure roller 7 is an eccentric wheel structure, and a pressure roller power unit is connected to its mounting shaft. The pressure roller 7, which is driven by the pressure roller power unit, rotates at high speed to forge and press the ceramic coating, thereby achieving uniformity and surface precision of the ceramic coating and strengthening the ceramic coating.

[0033] The outer ring of the pressure roller 7 is equipped with a roll forming layer. The roll forming layer has good high temperature resistance and non-stick properties, ensuring the reliability of ceramic coating forging.

[0034] The ceramic feeding device 4 is positioned and installed on the base frame 1 through the feeding device bracket 3. The ignition device 5 is positioned and installed on the base frame 1 through the ignition device bracket 6. The base frame 1 is also equipped with workpiece positioning wheels 14 that can limit the left and right sides of the workpiece to prevent the workpiece from shifting to the left and right and ensure the accuracy of workpiece feeding.

[0035] This invention also discloses a method for processing ceramic coatings on metal surfaces, comprising the following steps: S1: Ceramic coating processing on the outer surface of cylindrical workpiece 11; The ceramic feeding device 4 conveys ceramic material to the top of the cylindrical workpiece 11. After the ignition device 5 is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion and exothermic reaction at the top of the cylindrical workpiece 11 and heat-melts the top surface of the cylindrical workpiece 11. The rotating frame 2 is driven to rotate, and the centrifugal rolling bearing 9 is limited in the front and rear directions by the limiting seat 8. The centrifugal rolling bearing 9 is also limited in the radial direction of the rotating frame 2 by the limiting groove, so that the support frame is always at the bottom position of the rotating frame 2, and the cylindrical workpiece 11 supported by the support frame has a vertically downward centrifugal force. Under the action of centrifugal force, a metal layer, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the top surface of the cylindrical workpiece 11 to its outer edge. The cylindrical workpiece 11 is fed by rotation through the cylindrical workpiece drive device, and the surface of the coated cylindrical workpiece 11 is forged by the eccentric pressure roller 7 to achieve uniformity and surface precision of the ceramic coating. S2: Ceramic coating processing on the surface of plate workpiece 12; The conveying roller 13 and the central rotating roller 10 provide rolling support for the plate workpiece 12. The ceramic feeding device 4 conveys ceramic material to the upper surface of the plate workpiece 12. After the ignition device 5 is ignited, it is lifted up. The ceramic material generates a self-diffuse combustion and exothermic reaction on the upper surface of the plate workpiece 12 and heats the upper surface of the plate workpiece 12. The rotating frame 2 is driven to rotate, and the centrifugal rolling bearing 9 is limited in the front and rear directions by the limiting seat 8, and the centrifugal rolling bearing 9 is limited in the radial direction by the limiting groove, so that the central roller 10 is always at the bottom position of the rotating frame 2, and the plate workpiece 12 supported by the central roller 10 has a vertically downward centrifugal force; under the action of centrifugal force, a metal, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the upper surface to the outer edge of the plate workpiece 12. The plate workpiece 12 is moved and fed by the plate workpiece drive device, and the upper surface of the coated plate workpiece 12 is forged by the eccentric pressure roller 7 to achieve uniformity and surface precision of the ceramic coating.

[0036] This metal surface ceramic coating processing device and method features a simple overall structure and process flow, making it convenient to use and highly practical. It fully utilizes the heat released by the aluminothermic reaction itself, achieving high reaction temperatures without requiring external heat sources. The rapid reaction speed also allows for the evaporation of volatile impurities, resulting in high-purity products. The self-ignition high-temperature synthesis can be sustained for a considerable period, providing sufficient thermal energy to promote a more complete metallurgical bond between the ceramic coating and the metal substrate. This improves the bonding strength between the ceramic coating and the metal substrate, as well as the cohesive strength of the ceramic coating, ultimately enhancing the surface finish of the ceramic coating.

[0037] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0038] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ceramic coating processing device for metal surfaces, characterized in that, The system includes a base frame (1), a rotating frame (2) mounted on the base frame (1), and a workpiece support mechanism that can support the lower side of the workpiece. The rotating frame (2) is provided with limiting rings (21) at both ends, and a ring-shaped limiting groove is provided on the inner side of the limiting rings (21). Centrifugal rolling bearings (9) that can be installed in the limiting grooves are installed at both ends of the workpiece support mechanism. Limiting seats (8) that can limit the front and rear directions of the centrifugal rolling bearings (9) are provided on both sides of the base frame (1). The system also includes a ceramic feeding device (4) and an ignition device (5) located on the upper side of the workpiece and corresponding to the support position of the workpiece support mechanism. A pressure roller (7) that can press the ceramic coating is provided on the workpiece conveying direction side of the ceramic feeding device (4). The workpiece support mechanism includes a support frame capable of positioning and supporting the inner side of the cylindrical workpiece (11), and centrifugal rolling bearings (9) are installed at both ends of the support frame; The metal surface ceramic coating processing device also includes a cylindrical workpiece driving device that is connected to the central shaft of the support frame. The workpiece support mechanism includes a central roller (10) capable of rolling support on the lower side of the plate workpiece (12), and centrifugal rolling bearings (9) installed at both ends of the central roller (10); a conveyor roller (13) capable of rolling support on the base frame (1) is installed on the base frame (1). The metal surface ceramic coating processing device further includes a plate workpiece drive device capable of feeding the plate workpiece (12). The pressure roller (7) is an eccentric wheel structure, and its mounting shaft is connected to a pressure roller power unit.

2. The metal surface ceramic coating processing apparatus according to claim 1, characterized in that, The limit seat is a channel steel structure with an opening at the top.

3. The metal surface ceramic coating processing apparatus according to claim 1, characterized in that, The outer ring of the pressure roller (7) is provided with a roller pressing layer.

4. A method for processing ceramic coating on a metal surface based on the metal surface ceramic coating processing apparatus according to any one of claims 1 to 3, characterized in that, Includes the following steps: S1: Ceramic coating processing on the outer surface of cylindrical workpiece (11); The ceramic feeding device (4) delivers ceramic material to the top of the cylindrical workpiece (11). The ignition device (5) is ignited and then lifted. The ceramic material generates a self-spreading combustion and exothermic reaction at the top of the cylindrical workpiece (11) and produces heat melting on the top surface of the cylindrical workpiece (11). Drive the rotating frame (2) to rotate, limit the centrifugal rolling bearing (9) in the front and rear directions through the limiting seat (8), and limit the centrifugal rolling bearing (9) in the radial direction through the limiting groove, so that the support frame is always at the bottom position of the rotating frame (2), and the cylindrical workpiece (11) supported by the support frame has a vertically downward centrifugal force. Under the action of centrifugal force, a metal, a metal + ceramic transition layer and a ceramic layer are formed sequentially from the top surface of the cylindrical workpiece (11) to its outer edge; The cylindrical workpiece (11) is fed by rotating through the cylindrical workpiece drive device, and the surface of the coated cylindrical workpiece (11) is forged by the eccentric pressure roller (7) to achieve uniformity and surface precision of the ceramic coating. S2: Ceramic coating processing on the surface of plate workpiece (12); The conveying roller (13) and the center rotating roller (10) provide rolling support for the plate workpiece (12). The ceramic feeding device (4) conveys ceramic material to the upper surface of the plate workpiece (12). The ignition device (5) is ignited and then lifted up. The ceramic material generates a self-diffuse combustion and exothermic reaction on the upper surface of the plate workpiece (12) and generates heat melting on the upper surface of the plate workpiece (12). The rotating frame (2) is driven to rotate, and the centrifugal rolling bearing (9) is limited in the front and rear directions by the limiting seat (8), and the centrifugal rolling bearing (9) is limited in the radial direction by the limiting groove, so that the central roller (10) is always at the bottom position of the rotating frame (2), and the plate workpiece (12) supported by the central roller (10) has a vertically downward centrifugal force. Under the action of centrifugal force, metal, metal + ceramic transition layer and ceramic layer are formed sequentially from the upper surface to the outer edge of the plate workpiece (12); The plate workpiece (12) is moved and fed by the plate workpiece drive device, and the upper surface of the coated plate workpiece (12) is forged by the eccentric pressure roller (7) to achieve uniformity and surface accuracy of ceramic coating.

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