Coating tool for scroll compressor scroll plate and preparation method of wear-resistant coating thereof

Abstract

The application provides a coating tool for a scroll compressor scroll plate and a wear-resistant coating preparation method thereof, and the coating tool comprises a pad printing mechanism and a bearing mechanism, the pad printing mechanism comprises a machine body, a template, a printing table, a first moving module, a second moving module, an oil cup and a pad printing rubber head, the pad printing rubber head comprises a mounting plate, a rubber head main body part and a rubber head scroll part, the structure of the rubber head scroll part is matched with the structure of a scroll tooth, the bearing mechanism comprises a bottom plate, a guide column, a guide sleeve, a return spring and a rubber head limiting plate, the rubber head limiting plate is provided with a scroll hole, and the structure of the scroll hole is matched with the structure of the rubber head scroll part. The special coating tool is used for coating the wear-resistant coating, has high reliability and low manufacturing cost, can ensure the uniform thickness of the coating formed each time, can meet the product flatness requirement after sintering without secondary processing, can ensure product precision, can improve the wear-resistant performance of the scroll plate, can reduce friction loss, and can greatly prolong the service life of the product.

Description

Technical Field

[0001] This invention relates to the field of scroll compressor manufacturing technology, and in particular to a coating tooling for the scroll disk of a scroll compressor and a method for preparing a wear-resistant coating thereon. Background Technology

[0002] Scroll compressors have advantages such as simple structure, small size, light weight, low noise, high mechanical efficiency and stable operation, and are therefore widely used in household air conditioners, automotive air conditioners, gas supply systems and other fields.

[0003] The transmission system of a scroll compressor mainly consists of a moving scroll and a stationary scroll. These scrolls form a key friction pair and are the core components of the scroll compressor. During operation, the end faces of the moving and stationary scrolls slide relative to each other, providing a sealing function. In practical applications, this sliding surface is prone to oil shortage, leading to end face wear, especially during the initial startup phase. At this stage, the oil supply system of the scroll compressor pump is not yet balanced, and with the scouring effect of the refrigerant, the surfaces of both the moving and stationary scrolls lack oil, easily causing wear on their end faces. This can lead to compressor malfunctions during startup, reducing performance and shortening service life. Therefore, wear-resistant and friction-reducing measures need to be adopted in the manufacturing of the moving and stationary scrolls to improve product performance and extend service life.

[0004] The existing technologies mainly include the following four wear-resistant or wear-reducing measures: 1. Hard anodizing the surface of the moving and stationary scroll disks; 2. Nickel plating on the surface of the moving and stationary scroll disks; 3. In the anodizing process, grooves are machined at the head of the most easily worn scroll teeth, and polytetrafluoroethylene wear-resistant fiber strips are installed in the grooves; 4. Wear-resistant plates are added to one of the parts of the friction pair of the moving and stationary scroll disks.

[0005] For the first two measures mentioned above, the moving and stationary scroll plates are precision-machined from lightweight aluminum alloy. Current surface treatment technologies only improve the wear resistance of the product surface and cannot achieve the purpose of friction reduction. Achieving friction reduction usually requires the use of a certain amount of lubricating oil. The operating conditions of scroll compressors in many fields cannot provide good lubrication conditions for the friction pair of the moving and stationary scroll plates, resulting in poor lubrication of the scroll plates. The most wear-prone parts of this type of scroll structure often appear on the end faces of the scroll teeth of the moving and stationary scroll plates, accounting for more than 95% of mechanical failures. For the third measure mentioned above, due to the high requirements for dimensional accuracy control in the manufacturing of moving and stationary scroll plates, the installation of slots and wear-resistant fiber strips presents technological difficulties, and the material composition is difficult to fully meet the requirements of high temperature and high pressure environments. For the fourth measure mentioned above, in practical applications, the wear-resistant plates also need to be lubricated with lubricating oil. However, due to the difference in the amount of thermal deformation between the wear-resistant plates and the moving scroll plate in the high-pressure chamber, poor lubrication of the contact surface between the two is prone to occur, leading to abnormal wear of the moving scroll plate or breakage of the wear-resistant plates, affecting the reliability of the scroll compressor. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a coating fixture for a scroll compressor scroll disk and a method for preparing a wear-resistant coating. The invention designs a dedicated coating fixture and combines it with pad printing technology to coat the scroll disk with a wear-resistant coating, thereby improving the wear resistance of the scroll disk, ensuring product precision, and extending product service life.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A coating fixture for a scroll compressor scroll disk, wherein scroll teeth and protruding mounting portions are respectively provided on both sides of the scroll disk base.

[0009] The coating fixture includes a pad printing mechanism and a carrier mechanism. The pad printing mechanism includes a body, a template, a printing table, a first moving module, a second moving module, an ink container, and a pad printing head. The template, the printing table, the first moving module, and the second moving module are respectively mounted on the body. The ink container is connected to the first moving module and is used to hold wear-resistant coating. The first moving module drives the ink container to move on the template to fill the template with wear-resistant coating. The pad printing head is connected to the second moving module and is used to drive the pad printing head to move between the template and the printing table. The pad printing head includes a mounting plate, a head body, and a head vortex. The mounting plate is connected to the second moving module. The head body is mounted on the mounting plate, and the head vortex is formed on the side of the head body away from the mounting plate. The structure of the head vortex matches the structure of the vortex teeth.

[0010] The supporting mechanism includes a base plate, a guide post, a guide sleeve, a return spring, and a glue head limiting plate. The base plate is disposed on the printing platform and has a limiting groove, the structure of which matches the structure of the protruding mounting part. The guide post is disposed on the base plate, and the glue head limiting plate is disposed above the base plate. The glue head limiting plate has a vortex hole and a guide hole, the structure of which matches the structure of the glue head vortex part. The upper end of the guide post passes through the guide hole, and the guide sleeve and the return spring are sleeved on the guide post. The guide sleeve and the return spring are located between the base plate and the glue head limiting plate.

[0011] Preferably, the end face of the vortex tooth is provided with a storage groove for storing wear-resistant coating and increasing the stress on the wear-resistant coating, and the storage groove extends along the vortex-shaped structure of the vortex tooth.

[0012] Preferably, the storage tank has a width of 1.5 mm to 2.5 mm and a depth of 0.02 mm to 0.05 mm.

[0013] Preferably, the end face of the vortex tooth is chamfered on both sides.

[0014] Preferably, the thickness of the vortex portion of the rubber head is greater than the thickness of the vortex teeth, and the thickness difference between the vortex portion of the rubber head and the vortex teeth is 0.5 mm to 2.0 mm.

[0015] Preferably, the width of the vortex hole is greater than the thickness of the vortex portion of the rubber head, and the difference between the width of the vortex hole and the thickness of the vortex portion of the rubber head is 0.5 mm to 1.0 mm.

[0016] Preferably, the end face of the rubber head vortex is arc-shaped.

[0017] Preferably, there are two guide posts, which are respectively located on both sides of the limiting groove; the rubber head limiting plate is provided with two guide holes, which are respectively located on both sides of the vortex hole, and the two guide posts pass through the two guide holes respectively, and each guide post is fitted with a guide sleeve and a reset spring.

[0018] According to another aspect of the present invention, a method for preparing a wear-resistant coating for a scroll disk of a scroll compressor is also provided, comprising the following steps:

[0019] Step S1: Anodizing: The end face of the vortex teeth of the vortex disk is subjected to an anodizing treatment without sealing, so that a microporous anodized layer is formed on the end face of the vortex teeth.

[0020] Step S2: Place the workpiece: Provide the coating fixture for the scroll compressor scroll plate as described above, place the anodized scroll plate on the base plate, so that the protruding mounting part of the scroll plate is in the limiting groove on the base plate, and the scroll teeth of the scroll plate face the rubber head limiting plate.

[0021] Step S3: Pad Printing Coating: Start the pad printing mechanism, use the first moving module to drive the oil cup to move and fill the wear-resistant coating onto the template; then, use the second moving module to drive the pad printing head to move above the template and press down, using the vortex part of the pad printing head to pick up the wear-resistant coating on the template; then, use the second moving module to drive the pad printing head to move above the head limiting plate and press down, so that the vortex part of the head passes through the vortex hole on the head limiting plate and transfers the wear-resistant coating onto the end face of the vortex tooth;

[0022] Step S4: Sintering: The coated vortex disk is sent into a sintering furnace for sintering.

[0023] Preferably, the sintering temperature in step S4 is 180°C to 240°C.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention designs a special coating tooling and combines it with pad printing technology to coat the wear-resistant coating on the end face of the vortex tooth, which has high reliability and low manufacturing cost. It can ensure that the thickness of the wear-resistant coating formed by each coating is consistent. After coating and sintering, no secondary processing is required to meet the flatness requirements of the product, thus ensuring product precision. The wear-resistant coating can be a high-polymer wear-resistant and friction-reducing coating, which can improve the wear resistance of the vortex disk, reduce friction loss, and greatly extend the service life of the product. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the coating fixture for the scroll disk of a scroll compressor according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the pad printing head in the coating fixture of the scroll compressor scroll disk according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram from another angle of the pad printing head in the coating fixture of the scroll compressor scroll plate according to an embodiment of the present invention.

[0028] Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle.

[0029] Figure 5 This is a schematic diagram of the supporting mechanism in the coating fixture of the scroll disk of a scroll compressor according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the glue head limiting plate in the coating tooling of the scroll disk of the scroll compressor according to an embodiment of the present invention.

[0031] Figure 7 This is a cross-sectional view of a scroll disk according to an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the scroll disk on the side where the scroll teeth are located according to an embodiment of the present invention.

[0033] Figure 9 for Figure 7 Enlarged view of the structure at point B.

[0034] Figure 10 This is a flowchart illustrating a method for preparing a wear-resistant coating on the scroll disk of a scroll compressor according to an embodiment of the present invention.

[0035] In the diagram, 100-coating fixture, 10-pad printing mechanism, 11-machine body, 12-template, 13-printing table, 14-first moving module, 15-second moving module, 16-ink cup, 17-pad printing head, 171-mounting plate, 172-head body, 173-head scroll, 20-carrying mechanism, 21-base plate, 211-limiting groove, 22-guide post, 23-guide sleeve, 24-reset spring, 25-head limiting plate, 251-scroll hole, 252-guide hole, 200-scroll disk, 201-scroll teeth, 202-protruding mounting part, 203-storage tank, 204-chamfer. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0037] In the description of this invention, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates at least two.

[0038] In the description of this invention, references to "one embodiment" or "some embodiments" mean that one or more embodiments of the invention include a particular feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "one embodiment," "some embodiments," "other embodiments," "and other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0039] Please refer to the above. Figures 7 to 9 , Figure 7 This is a cross-sectional view of a scroll disk according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the scroll disk on the side where the scroll teeth are located according to an embodiment of the present invention. Figure 9 for Figure 7Enlarged view of the structure at point B. In one embodiment, the scroll disk 200 has scroll teeth 201 and protruding mounting portions 202 on both sides of its base. The scroll teeth 201 have a scroll-shaped structure from the center outward on this side of the scroll disk 200, and the protruding mounting portions 202 are used to install the scroll disk 200 in a scroll compressor.

[0040] This invention provides a scroll compressor scroll disk coating fixture 100 for applying a wear-resistant coating to the end faces of the scroll teeth 201 in the scroll disk 200, thereby improving the wear resistance of the scroll disk 200, reducing friction loss, and extending product service life. Please refer to [reference needed]. Figures 1 to 6 , Figure 1 This is a schematic diagram of the structure of a scroll compressor scroll disk coating tooling according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the pad printing head in the scroll plate coating fixture of a scroll compressor according to an embodiment of the present invention. Figure 3 This is a schematic diagram from another angle of the pad printing head in the scroll plate coating fixture of a scroll compressor according to an embodiment of the present invention. Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle. Figure 5 This is a schematic diagram of the supporting mechanism in the scroll disk coating fixture of a scroll compressor according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the adhesive head limiting plate in a scroll compressor scroll disk coating fixture according to an embodiment of the present invention. In some embodiments, the coating fixture 100 includes a pad printing mechanism 10 and a support mechanism 20. The support mechanism 20 is used to place the scroll disk 200 to be coated, and the pad printing mechanism 10 is used to apply the wear-resistant coating to the end face of the scroll teeth 201.

[0041] Specifically, the pad printing mechanism 10 includes a body 11, a template 12, a printing table 13, a first moving module 14, a second moving module 15, an ink container 16, and a pad printing head 17. The template 12, printing table 13, first moving module 14, and second moving module 15 are respectively mounted on the body 11. The ink container 16 is connected to the first moving module 14 and is used to hold wear-resistant coating. The first moving module 14 drives the ink container 16 to move on the template 12 to fill the template 12 with wear-resistant coating. The bearing mechanism 20 is mounted on the printing table 13. The pad printing head 17 is connected to the second moving module 15 and is used to drive the pad printing head 17 to move between the template 12 and the printing table 13 to transfer the wear-resistant coating on the template 12 to the end face of the spiral tooth 201. The pad printing head 17 includes a mounting plate 171, a head body 172, and a head vortex 173. The mounting plate 171 is connected to the second moving module 15. The head body 172 is disposed on the mounting plate 171. The head vortex 173 is formed on the side of the head body 172 away from the mounting plate 171. The head vortex 173 is in the shape of a vortex from the center outward. The structure of the head vortex 173 matches the structure of the vortex tooth 201.

[0042] The supporting mechanism 20 includes a base plate 21, a guide post 22, a guide sleeve 23, a return spring 24, and a glue head limiting plate 25. The base plate 21 is mounted on the printing table 13 and has a limiting groove 211, the structure of which matches the structure of the protruding mounting part 202. The guide post 22 is mounted on the base plate 21, and the glue head limiting plate 25 is located above the base plate 21. The glue head limiting plate 25 has a vortex hole 251 and a guide hole 252. The vortex hole 251 is vortex-shaped, and its structure matches the structure of the glue head vortex part 173. The guide post 22 passes through the guide hole 252. The guide sleeve 23 and the return spring 24 are sleeved on the guide post 22 and located between the base plate 21 and the glue head limiting plate 25. The guide sleeve 23 is located above the return spring 24. When the scroll plate 200 is placed on the base plate 21 with the scroll teeth 201 facing upwards, the protruding mounting portion 202 of the scroll plate 200 is exactly within the limiting groove 211 of the base plate 21, and the scroll hole 251 on the glue head limiting plate 25 corresponds exactly to the scroll teeth 201. In application, the thickness of the glue head limiting plate 25 (the depth of the scroll hole 251) and the height of the glue head scroll portion 173 can be reasonably set according to requirements such as coating thickness.

[0043] In applications, wear-resistant coatings can be made from polymeric wear-resistant and friction-reducing coatings produced by specialized companies. These coatings are already widely used in aerospace and other fields with good results, but they are rarely used in the manufacturing of scroll compressor components, and a highly reliable and low-cost coating method is lacking. This invention designs a dedicated coating fixture for applying wear-resistant coatings to the end faces of scroll gears, offering high reliability and low manufacturing costs. It ensures consistent coating thickness with each application, and after coating and sintering, no secondary processing is required to meet product flatness requirements, ensuring product precision, improving the wear resistance of the scroll disk, reducing friction loss, and significantly extending product lifespan. This makes the application of polymeric wear-resistant and friction-reducing coatings in compressor components possible. Furthermore, the sintering temperature of these polymeric wear-resistant and friction-reducing coatings is below 240℃, ensuring that the strength and hardness of the scroll disk 200 do not change significantly after sintering, guaranteeing product quality and performance.

[0044] During the coating operation, the scroll plate 200 is placed on the base plate 21, the protruding mounting part 202 of the scroll plate 200 is located in the limiting groove 211 of the base plate 21, and the scroll teeth 201 of the scroll plate 200 face the glue head limiting plate 25. In each coating operation, the oil cup 16 contains wear-resistant coating. The first moving module 14 drives the oil cup 16 to move, filling the template 12 with wear-resistant coating. After filling, the oil cup 16 is removed, and the second moving module 15 drives the pad printing head 17 to move above the template 12 and presses it down. The vortex part 173 of the printing head picks up the wear-resistant coating on the template 12. Then, the second moving module 15 drives the pad printing head 17 to move above the printing head limiting plate 25 and presses it down. The vortex part 173 of the printing head passes through the vortex hole 251 on the printing head limiting plate 25 and transfers the wear-resistant coating onto the end face of the vortex tooth 201. During this process, the cooperation structure of the guide hole 252, the guide sleeve 23 and the guide post 22 can ensure that the printing head limiting plate 25 moves along the axis of the guide post 22, ensuring the accuracy of coating position control and improving coating quality. The design of the vortex section 173 in the pad printing head 17 ensures consistent coating thickness with each application. The design of the head limiting plate 25 ensures accuracy in coating position and thickness while protecting the pad printing head 17 and extending the service life of the coating fixture 100. Depending on the required wear-resistant coating thickness, the above transfer coating operation can be performed multiple times. After coating is completed, the second moving module 15 drives the pad printing head 17 to move in the opposite direction. Under the elastic force of the return spring 24, the head limiting plate 25 can reset along the axis of the guide post 22, facilitating the removal of the vortex plate 200.

[0045] Because the pad printing head 17 is used to press down and pick up the wear-resistant coating, and then press down to transfer it onto the end face of the vortex tooth 201, even if there are air bubbles in the wear-resistant coating, the elastic moving pad 17 can remove the air bubbles during the pressing process, thus avoiding the defective phenomenon of air bubbles in the wear-resistant coating of the vortex disk and improving product quality.

[0046] Please refer to the above. Figure 7 and Figure 9 In some preferred embodiments of the present invention, the end face of the vortex tooth 201 is provided with a storage groove 203 for storing wear-resistant coating and increasing the force on the wear-resistant coating. The storage groove 203 can extend along the vortex-shaped structure of the vortex tooth 201. The provision of the storage groove 203 can improve the adhesion of the wear-resistant coating, improve the wear resistance of the vortex disk, and extend its service life.

[0047] In some embodiments, the thickness of the vortex tooth 201 is 3.0 mm to 5.0 mm, the width of the storage groove is 1.5 mm to 2.5 mm, and the depth of the storage groove is 0.02 mm to 0.05 mm.

[0048] Furthermore, the end face of the vortex tooth 201 is provided with chamfers 204 on both sides, which facilitates the assembly of parts and can avoid stress concentration, thereby improving the structural strength of the vortex disk 200.

[0049] In some preferred embodiments of the present invention, the thickness of the vortex portion 173 of the rubber head is greater than the thickness of the vortex tooth 201, and the thickness difference between the vortex portion 173 of the rubber head and the vortex tooth 201 is 0.5 mm to 2.0 mm.

[0050] In some preferred embodiments of the present invention, the width of the vortex hole 251 is greater than the thickness of the vortex portion 173 of the glue head, and the difference between the width of the vortex hole 251 and the thickness of the vortex portion 173 of the glue head is 0.5 mm to 1.0 mm.

[0051] Please refer to the above. Figure 2 and Figure 4 In a preferred embodiment of the present invention, the end face of the vortex portion 173 of the glue head is arc-shaped, which facilitates the removal of air bubbles in the wear-resistant coating during the downward pressure coating process and improves the coating quality.

[0052] In some embodiments, the hardness of the pad printing head is 25 to 45 degrees (Shore A hardness), which can achieve a better pad printing coating effect.

[0053] In some embodiments, there are two guide posts 22, which are respectively disposed on both sides of the limiting groove 211. Correspondingly, the glue head limiting plate 25 is provided with two guide holes 252, which are respectively disposed on both sides of the vortex hole 251. The two guide posts 22 pass through the two guide holes 252 respectively, and each guide post 22 is fitted with a guide sleeve 23 and a return spring 24. The cooperation structure of the guide holes 252, guide sleeves 23 and guide posts 22 can ensure that the glue head limiting plate 25 moves along the axial direction of the guide post 22, ensuring position control accuracy and improving coating quality.

[0054] In application, the first moving module 14 can be a commercially available linear moving module or a two-axis moving module, and the second moving module 15 can be a two-axis moving module or a three-axis moving module. The structure and working principle of these moving module products are existing technologies and will not be described in detail here.

[0055] According to another aspect of the present invention, a method for preparing a wear-resistant coating for a scroll disk of a scroll compressor is provided. Please refer to [reference needed]. Figures 1 to 10 , Figure 10 This is a flowchart illustrating a method for preparing a wear-resistant coating on the scroll disk of a scroll compressor according to an embodiment of the present invention. The preparation method includes the following steps:

[0056] Step S1: Anodizing: The end face of the scroll teeth 201 of the scroll disk 200 is anodized without sealing, so that a microporous anodized layer is formed on the end face of the scroll teeth 201. This step can use existing anodizing processes without sealing. The purpose is to improve the wear resistance, corrosion resistance and surface hardness of the scroll disk 200 surface, while improving the surface roughness. The microporous anodized layer formed after anodizing can increase the adhesion of the subsequent wear-resistant coating.

[0057] Step S2: Place the workpiece: Provide the coating fixture 100 for the scroll compressor scroll plate as described above, place the anodized scroll plate on the base plate, so that the protruding mounting part of the scroll plate is in the limiting groove on the base plate, and the scroll teeth of the scroll plate face the rubber head limiting plate.

[0058] Step S2: Place the workpiece: Provide the scroll compressor scroll disk coating fixture 100 as described above, place the anodized scroll disk 200 on the base plate 21, so that the protruding mounting part 202 of the scroll disk 200 is in the limiting groove 211 on the base plate 21, the scroll teeth 201 of the scroll disk 200 face the glue head limiting plate 25, and the scroll teeth 201 correspond vertically to the scroll holes 251 on the glue head limiting plate 25.

[0059] Step S3: Pad Printing Coating: The ink cup 16 is filled with wear-resistant coating material. The pad printing mechanism 10 is activated, and the first moving module 14 drives the ink cup 16 to move, filling the template 12 with the wear-resistant coating material. After filling, the ink cup 16 is removed, and the second moving module 15 drives the pad printing head 17 to move above the template 12 and presses it down. The arc-shaped end face of the vortex part 173 of the printing head picks up the wear-resistant coating material from the template 12. Then, the second moving module 15 drives the pad printing head 17 to move above the printing head limiting plate 25 and presses it down, causing the vortex part 173 of the printing head to pass through the vortex hole 251 on the printing head limiting plate 25, transferring the wear-resistant coating material onto the end face of the vortex tooth 201. After coating, the second moving module 15 drives the pad printing head 17 to move in the opposite direction. Under the elastic force of the return spring 24, the printing head limiting plate 25 can return to its original position along the axis of the guide post 22.

[0060] In some embodiments, step S3 can be repeated multiple times to meet the wear-resistant coating thickness requirements.

[0061] Step S4: Sintering: The coated scroll disk 200 is sent into a sintering furnace for sintering to harden the wear-resistant coating, thereby forming a wear-resistant coating on the end face of the scroll tooth 201, improving the wear resistance of the scroll disk 200 and extending the service life of the scroll disk 200.

[0062] In some preferred embodiments of the present invention, the sintering temperature in step S4 is not higher than 240°C, for example, it can be 180°C to 240°C. In this way, the wear-resistant coating can be hardened to meet the high wear resistance performance, and the strength and hardness of the scroll disk 200 after sintering can be ensured without much change, thus guaranteeing product quality and performance.

[0063] In some preferred embodiments of the present invention, before anodizing, a storage groove can be machined on the end face of the volute teeth of the volute disk. The storage groove can extend along the volute structure of the volute teeth. The storage groove allows for the storage of wear-resistant coating and increases the stress on the wear-resistant coating, improving the adhesion of the wear-resistant coating, enhancing the wear resistance of the volute disk, and extending its service life. The width and depth of the storage groove can be reasonably set according to the size of the volute teeth and the required thickness of the wear-resistant coating. In some embodiments, the thickness of the volute teeth is 3.0 mm to 5.0 mm, the width of the storage groove is 1.5 mm to 2.5 mm, and the depth of the storage groove is 0.02 mm to 0.05 mm.

[0064] It should be noted that, Figures 1 to 10Only some embodiments of the present invention are shown, including the moving scroll plate and the corresponding coating fixture and method. However, the present invention is not limited thereto. In other embodiments, the coating fixture and wear-resistant coating preparation method of the present invention can also be applied to the coating of the stationary scroll plate. It is only necessary to reasonably adjust the structure of the template 12, the glue head scroll part 173, the base plate 21, the glue head limiting plate 25 and other components according to the scroll tooth structure of the stationary scroll plate.

[0065] After employing the above-mentioned scroll compressor scroll disk coating fixture 100 and wear-resistant coating preparation method, the thickness of the wear-resistant coating on the scroll disk can reach 5µm to 20µm, and the flatness accuracy can be controlled within 0.005µm. In the dry grinding test, the scroll disk 200 was dry-ground for 60 minutes under experimental conditions of 120 kg pressure and 800 rpm, and the wear rate was only within 0.005. In one embodiment, a compressor life test was conducted on a scroll disk with a wear-resistant coating thickness of 15µm to 20µm, and after 6000 hours, the wear of the wear-resistant coating was only 10µm.

[0066] In summary, this invention provides a coating fixture for a scroll compressor scroll disk and a method for preparing a wear-resistant coating. A dedicated coating fixture is designed and combined with pad printing technology to coat the wear-resistant coating on the end face of the scroll teeth. This method offers high reliability, low manufacturing cost, and ensures consistent coating thickness for each coating application. After coating and sintering, no secondary processing is required to meet product flatness requirements, ensuring product precision. The wear-resistant coating can be a high-polymer wear-resistant and friction-reducing coating, which can improve the wear resistance of the scroll disk, reduce friction loss, and significantly extend product lifespan.

[0067] The present invention has been described by the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A coating tool for a scroll plate of a scroll compressor, characterized by: The base of the vortex disk is provided with vortex teeth and protruding mounting parts on both sides respectively; The coating fixture includes a pad printing mechanism and a carrier mechanism. The pad printing mechanism includes a body, a template, a printing table, a first moving module, a second moving module, an ink container, and a pad printing head. The template, the printing table, the first moving module, and the second moving module are respectively mounted on the body. The ink container is connected to the first moving module and is used to hold the wear-resistant coating. The first moving module is used to drive the ink container to move on the template to fill the wear-resistant coating onto the template. The pad printing head is connected to the second moving module, and the second moving module is used to drive the pad printing head to move between the template and the printing table; The pad printing head includes a mounting plate, a head body, and a head vortex. The mounting plate is connected to the second moving module. The head body is disposed on the mounting plate. The head vortex is formed on the side of the head body away from the mounting plate. The structure of the head vortex matches the structure of the vortex teeth. The supporting mechanism includes a base plate, a guide post, a guide sleeve, a return spring, and a glue head limiting plate. The base plate is disposed on the printing platform and has a limiting groove, the structure of which matches the structure of the protruding mounting part. The guide post is disposed on the base plate, and the glue head limiting plate is disposed above the base plate. The glue head limiting plate has a vortex hole and a guide hole, the structure of which matches the structure of the glue head vortex part. The upper end of the guide post passes through the guide hole, and the guide sleeve and the return spring are sleeved on the guide post. The guide sleeve and the return spring are located between the base plate and the glue head limiting plate.

2. The coating tool for a scroll compressor scroll plate according to claim 1, wherein: The end face of the vortex tooth is provided with a storage groove for storing wear-resistant coating and increasing the stress on the wear-resistant coating, and the storage groove extends along the vortex-shaped structure of the vortex tooth.

3. The coating tool for a scroll compressor scroll plate according to claim 2, wherein: The storage tank has a width of 1.5 mm to 2.5 mm and a depth of 0.02 mm to 0.05 mm.

4. The coating tool for a scroll compressor scroll plate according to claim 1, wherein: The end face of the vortex tooth is chamfered on both sides.

5. The coating tool for a scroll compressor scroll plate as set forth in claim 1, wherein: The thickness of the vortex portion of the rubber head is greater than the thickness of the vortex teeth, and the thickness difference between the vortex portion of the rubber head and the vortex teeth is 0.5 mm to 2.0 mm.

6. The coating tool for a scroll compressor scroll plate as set forth in claim 1, wherein: The width of the vortex hole is greater than the thickness of the vortex portion of the rubber head, and the difference between the width of the vortex hole and the thickness of the vortex portion of the rubber head is 0.5mm to 1.0mm.

7. The coating tool for a scroll compressor scroll plate as set forth in claim 1, wherein: The end face of the vortex section of the rubber head is arc-shaped.

8. The coating tool for a scroll compressor scroll plate as set forth in claim 1, wherein: There are two guide posts, which are respectively located on both sides of the limiting groove; the rubber head limiting plate is provided with two guide holes, which are respectively located on both sides of the vortex hole, and the two guide posts pass through the two guide holes respectively. Each guide post is fitted with a guide sleeve and a reset spring.

9. A method for preparing a wear-resistant coating on the scroll disk of a scroll compressor, characterized in that: Includes the following steps: Step S1: Anodizing: The end face of the vortex teeth of the vortex disk is subjected to an anodizing treatment without sealing, so that a microporous anodized layer is formed on the end face of the vortex teeth. Step S2: Placing the workpiece: Provide a coating fixture for the scroll disk of a scroll compressor as described in any one of claims 1 to 8, place the anodized scroll disk on the base plate, such that the protruding mounting portion of the scroll disk is in the limiting groove on the base plate, and the scroll teeth of the scroll disk face the rubber head limiting plate. Step S3: Pad Printing Coating: Start the pad printing mechanism, use the first moving module to drive the oil cup to move and fill the wear-resistant coating onto the template; then, use the second moving module to drive the pad printing head to move above the template and press down, using the vortex part of the pad printing head to pick up the wear-resistant coating on the template; then, use the second moving module to drive the pad printing head to move above the head limiting plate and press down, so that the vortex part of the head passes through the vortex hole on the head limiting plate and transfers the wear-resistant coating onto the end face of the vortex tooth; Step S4: Sintering: The coated vortex disk is sent into a sintering furnace for sintering.

10. The method of claim 9, wherein the method further comprises: applying a primer layer to the surface of the scroll disk; and applying a topcoat layer to the primer layer. The sintering temperature in step S4 is 180°C to 240°C.

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