Aluminum material surface treatment oxidation equipment

Abstract

The present application relates to surface treatment oxidation equipment technical field, specifically relates to a kind of aluminium material surface treatment oxidation equipment, comprising: oxidation body and plasma spraying body, the oxidation body is connected with plasma spraying body by heat diffusion transition device intercommunication.The present application is by setting moving flattening mechanism and other components, utilize the meshing of fixed toothed plate and transmission gear to make half gear rotate, one side by push block push vibration block to generate high-frequency vibration, through vibration transmission plate and telescopic vibration plate first to flatten roller on just spraying coating vibration exhaust, the other side drive flattening roller to hot rolling compaction to the coating that has been exhausted, simultaneously half gear and lifting toothed plate cooperate to drive flattening plate periodic lifting, realize vibration exhaust and rolling compaction in single feeding in collaborative continuous operation, fundamentally eliminate the defect that traditional rolling will gas be closed to form high-pressure gas cavity, significantly improve coating density and the uniformity of subsequent micro-arc oxidation film layer.

Description

Technical Field

[0001] This invention relates to the field of surface treatment oxidation equipment technology, and specifically to an aluminum surface treatment oxidation equipment. Background Technology

[0002] Before micro-arc oxidation, aluminum materials are traditionally pretreated by chemical alkaline etching and acid pickling. However, in actual use, the chemical bath solution needs to be frequently replaced and specially treated, generating a large amount of industrial hazardous waste containing acid and alkali. Moreover, the chemical pretreatment and oxidation process are independent of each other, and the workpieces must be repeatedly moved between the cleaning tank and the oxidation tank, causing inconvenience in use and reducing the overall effectiveness of the oxidation equipment. To overcome the above shortcomings, the industry has attempted to use thermal spraying as a pre-treatment method for micro-arc oxidation. This involves using a plasma heat source to prepare a metal underlayer on the aluminum surface, followed by micro-arc oxidation to form a composite ceramic film. However, thermal spray coatings are formed by the high-speed impact and stacking of molten particles, inevitably resulting in gaps and pores between the particles. The porosity of flame-sprayed coatings can reach 10%–20%. These pores can cause the electrolyte to penetrate along the pores to the interface during subsequent micro-arc oxidation, leading to galvanic corrosion. Simultaneously, residual gas within the pores can cause localized breakdown during high-voltage discharge, resulting in uneven film formation. To address the porosity issue in thermal spray coatings, traditional surface treatment oxidation equipment employs a direct rolling method to densify the coating. Since the coating is composed of stacked molten particles, it has high porosity and residual gas within the pores. During rolling, the surface particles undergo plastic deformation and close, cutting off the gas's escape channels. Under continuous pressure, the internal gas is driven deep into the coating and compressed into high-pressure cavities. During subsequent micro-arc oxidation, the workpiece is immersed in the electrolyte and subjected to the high temperature generated by high-voltage discharge, causing the cavities to expand rapidly, leading to localized stress concentration and exacerbating coating peeling. This not only causes inconvenience but also reduces the equipment's effectiveness and film quality. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides an aluminum surface treatment oxidation equipment, which can effectively solve the problem that the gas in the pores of the thermal spray coating is easily blocked to form high-pressure cavitation, resulting in film peeling and discontinuous process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an aluminum surface treatment oxidation device, comprising: an oxidation body and a plasma spraying body, wherein the oxidation body and the plasma spraying body are connected by a thermal diffusion transition device, and a flattening roller is provided inside the plasma spraying body, and further comprising: A movable flattening mechanism for venting and flattening during spraying includes a fixed toothed plate, which is embedded and fixedly connected to the inner side of the plasma spraying body. A transmission gear meshes with the top of the fixed toothed plate, and a half gear is fixedly connected to the inner side of the transmission gear. The inner side of the half gear is fixedly connected to the outer side of the flattening roller. A lifting toothed plate meshes with one side of the half gear, and a pressure plate is slidably connected to one side of the lifting toothed plate. A pushing block is fixedly connected to the inner side of the half gear, and a vibrating block is slidably connected to the inner side of the pushing block. A vibration transmission plate is provided at the bottom of the vibration block, and a telescopic vibration plate is slidably connected to one side of the vibration transmission plate.

[0005] Furthermore, a fixed plate is slidably connected to one side of the lifting toothed plate, and the fixed plate is slidably connected to the inner side of the plasma spraying body. The fixed plate is also fixedly connected to the moving end of the plasma spraying body nozzle. The fixed plate is rotatably connected to the flattening roller. The fixed plate is elastically connected to the vibration block through a vibration spring. The fixed plate is elastically connected to the vibration transmission plate through an elastic support block. The vibration transmission plate is elastically connected to the telescopic vibration plate through a tension slide rod.

[0006] Furthermore, the bottom of the telescopic vibration plate is fixedly connected to an anti-wear plate, and the bottom of the anti-wear plate is provided with an exhaust hole.

[0007] Furthermore, it also includes a continuous pressure application assembly for flattening and applying continuous pressure. The continuous pressure application assembly includes a lower pressure toothed plate that meshes with a half gear. The bottom of the lower pressure toothed plate is elastically connected to a telescopic moving plate via an elastic telescopic column. The telescopic moving plate is telescopically connected to the pressure plate via a telescopic rod. The top of the lower pressure toothed plate is elastically connected to an elastic push rod, which is elastically connected to a fixed plate. A positioning plate is slidably connected to the outside of the pressure plate and is fixedly connected to the inside of the plasma spraying body. The bottom of the inside of the positioning plate is inclined and protruding.

[0008] Furthermore, a pull rod is fixedly connected to the top of the telescopic moving plate, and a pressure column is elastically connected to the bottom of the pull rod through a compression spring, and the pressure column is fixedly connected to the top of the telescopic vibrating plate.

[0009] Furthermore, it also includes a heat flow assembly for preventing the telescopic vibration plate from overheating and for insulating the pressure plate. The heat flow assembly includes a heat-conducting plate, which is elastically connected to the interior of the pressure plate through a heat insulation plate. The heat-conducting plate has a heat dissipation channel inside, which is connected to a storage box through a pipe. The storage box is fixedly connected to the top of the telescopic vibration plate. The telescopic vibration plate has a cavity inside, which is filled with a phase change material. The cavity is unidirectionally connected to the heat-conducting plate through a delivery pipe.

[0010] Furthermore, a shape memory alloy strip is hinged to the outer side of the heat-conducting plate, and the shape memory alloy strip is fixedly connected to the inside of the pressure plate.

[0011] Furthermore, a compression plate is slidably connected inside the cavity, and the compression plate is fixedly connected to the vibration transmission plate 48.

[0012] Beneficial effects The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention, by setting up a moving flattening mechanism and other components, utilizes the meshing of a fixed toothed plate and a transmission gear to rotate a half gear. On one hand, a pushing block drives a vibrating block to generate high-frequency vibration, which, through a vibration transmission plate and a telescopic vibrating plate, vibrates and vents the freshly sprayed coating before the flattening roller. On the other hand, it drives the flattening roller to roll and densify the vented coating while it is still hot. At the same time, the half gear and the lifting toothed plate cooperate to drive the flattening plate to lift periodically, realizing the coordinated and continuous operation of vibration venting and rolling densification in a single feed. This fundamentally eliminates the defect of traditional rolling that seals the gas and forms high-pressure cavities, significantly improving the coating density and the uniformity of the subsequent micro-arc oxidation film layer.

[0013] II. This invention, by setting up components such as a continuous pressure application assembly, when the half gear meshes with the lower pressure plate, the pressure plate is elastically pressed down by the elastic telescopic column and the telescopic moving plate, applying segmented continuous pressure to the rolled coating. At the same time, the pull rod and the lower pressure column are linked to the telescopic vibration plate for synchronous pressing, preventing the coating from cooling, shrinking, and rebounding to create new pores. Under the guidance of the inclined protrusion at the bottom of the positioning plate, the pressure plate is slightly moved horizontally to detach from the coating when it is raised, thereby locking the densification results and ensuring the flatness and bonding stability of the coating after it is formed.

[0014] Third, this invention, by setting up heat flow components and shape memory alloy strips, enables the waste heat absorbed by the telescopic vibration plate to drive the phase change material to liquefy. Under the action of the extrusion plate, the material enters the heat release channel through the conveying pipe and releases heat to the pressure plate at a constant temperature. At the same time, as the temperature rises, the shape memory alloy strip causes the heat-conducting plate to adhere to the pressure plate to enhance heat transfer. When the temperature drops, the strip detaches. After the heat is released, the medium flows back to the storage box to complete the cycle. This prevents the telescopic vibration plate from overheating, avoids the coating from cooling too quickly in certain areas and causing internal stress cracking, and realizes the recovery and reuse of waste heat from the spraying. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the movable flattening mechanism of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the wear-resistant plate of the present invention; Figure 5 This is a schematic diagram of the continuous pressure application component of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the positioning plate of the present invention; Figure 8 This is a schematic diagram of the heat flow component of the present invention.

[0017] Reference numerals: 1. Oxidized body; 2. Plasma sprayed body; 3. Flattening roller; 4. Moving flattening mechanism; 41. Fixed toothed plate; 42. Transmission gear; 43. Half gear; 44. Lifting toothed plate; 45. Pressing plate; 46. Pushing block; 47. Vibrating block; 48. Vibration transmission plate; 49. Telescopic vibrating plate; 5. Fixed plate; 6. Wear-resistant plate; 7. Continuous pressure assembly; 71. Lower pressing toothed plate; 72. Telescopic moving plate; 73. Elastic push rod; 74. Positioning plate; 8. Pulling rod; 9. Lower pressing column; 10. Heat flow assembly; 101. Heat conducting plate; 102. Heat dissipation channel; 103. Storage box; 11. Shape memory alloy strip; 12. Extrusion plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] See attached document Figure 1-8An aluminum surface treatment oxidation device includes: an oxidation body 1 and a plasma spraying body 2, which are connected by a thermal diffusion transition device. The plasma spraying body 2 is provided with a flattening roller 3. The device also includes: a movable flattening mechanism 4 for venting and flattening during spraying. The movable flattening mechanism 4 includes a fixed toothed plate 41, which is embedded and fixedly connected to the inner side of the plasma spraying body 2. A transmission gear 42 is engaged at the top of the fixed toothed plate 41. A half gear 43 is fixedly connected to the inner side of the transmission gear 42. The inner side of the half gear 43 is fixedly connected to the outer side of the flattening roller 3. A lifting toothed plate 44 is engaged on one side of the half gear 43. A pressure plate 45 is slidably connected to one side of the lifting toothed plate 44. A pushing block 46 is fixedly connected to the inner side of the half gear 43. A vibration block 47 is slidably connected to the inner side of the pushing block 46. A vibration transmission plate 48 is provided at the bottom of the vibration block 47. A telescopic vibration plate 49 is slidably connected to one side of the vibration transmission plate 48. Among them, the anodizing body 1 is used to complete the micro-arc oxidation treatment of the aluminum surface, the plasma spraying body 2 is used to prepare the metal underlayer on the aluminum surface, and the thermal diffusion transition device is used for heat preservation and temporary storage after spraying and to form an interface metallurgical bonding transition layer using residual heat. During operation, the fixed plate 5 is fed synchronously with the moving end of the nozzle, driving the entire mechanism to move along the spraying trajectory. The telescopic vibration plate 49 is always in front of the flattening roller 3 and contacts the freshly sprayed coating before the flattening roller 3. When the flattening roller 3 is fed, it drives the transmission gear 42 to move and rotate along the fixed tooth plate 41, which in turn drives the half gear 43 to rotate. The half gear 43 drives the push block 46 to rotate, and the push block 46 pushes the vibration block 47 to compress the vibration spring to generate high-frequency vibration. The vibration is transmitted through the vibration transmission plate 48 and the telescopic vibration plate 49 to perform pre-vibration exhaust on the coating, and the gas is discharged directionally along the exhaust hole of the anti-wear plate 6. On the other hand, it drives the flattening roller 3 to roll and densify the coating after exhaust. After rolling, the half gear 43 and the lower pressure tooth plate 7 1. Engagement generates downward pressure, which, via the elastic telescopic column and telescopic moving plate 72, drives the pressure plate 45 to maintain elastic pressure on the coating. When the telescopic moving plate 72 presses down, it simultaneously drives the telescopic vibrating plate 49 to press the coating through the pull rod 8 and the pressing column 9. When the half gear 43 rotates to engage with the lifting tooth plate 44, it drives the pressure plate 45 to lift and reset. The tilted protrusion at the bottom of the positioning plate 74 forces the pressure plate 45 to move slightly horizontally and detach from the coating. During the pressure holding process, the phase change material in the cavity of the telescopic vibrating plate 49 absorbs heat and liquefies. The extrusion plate 12 applies pressure to it, and the liquefied medium flows into the heat dissipation channel 102 of the heat-conducting plate 101 through the conveying pipe to keep the pressure plate 45 at a constant temperature. The shape memory alloy strip 11 adjusts the contact state between the heat-conducting plate 101 and the pressure plate 45 according to the temperature change. After heat release, the medium flows back to the storage box 103 to complete the cycle. The whole mechanism realizes the continuous operation of the three processes of vibration exhaust, hot rolling, and pressure holding and pressing along the same trajectory, eliminating the problem of gas being sealed and forming high-pressure cavitation from the root. A fixed plate 5 is slidably connected to one side of the lifting toothed plate 44, and the fixed plate 5 is slidably connected to the inner side of the plasma spraying body 2. The fixed plate 5 is also fixedly connected to the moving end of the nozzle of the plasma spraying body 2. The fixed plate 5 is rotatably connected to the flattening roller 3. The fixed plate 5 is elastically connected to the vibrating block 47 via a vibration spring. The fixed plate 5 is elastically connected to the vibration transmission plate 48 via an elastic support block. The vibration transmission plate 48 is elastically connected to the telescopic vibration plate 49 via a tension slide rod. The fixed plate 5 is used to fix the moving end of the nozzle of the plasma spraying body 2, driving the entire mechanism to feed synchronously along the spraying trajectory, ensuring the synchronous operation of the spraying operation and the densification treatment. The fixed plate 5 also provides sliding support for the lifting toothed plate 44 and the flattening roller 3. A rotational support is provided to ensure the stability and synchronization of the movement of each component; a vibration spring is used to provide elastic reset support for the vibration block 47, so that the vibration block 47 can complete high-frequency reciprocating vibration with the push of the push block 46, ensuring the continuous and stable vibration exhaust effect; a wear-resistant plate 6 is fixedly connected to the bottom of the telescopic vibration plate 49, and an exhaust hole is opened at the bottom of the wear-resistant plate 6; the wear-resistant plate 6 is used to fix the bottom of the telescopic vibration plate 49, directly contacting the coating surface, avoiding direct friction damage to the telescopic vibration plate 49, and extending the service life of the component; the exhaust hole at the bottom of the wear-resistant plate 6 is used to provide a directional exhaust channel for the residual gas vibrated out of the coating pores, ensuring that the gas can be smoothly discharged to the outside of the coating, and avoiding the gas being trapped inside the coating again; See attached document Figure 2-7It also includes a continuous pressure application component 7 for flattening and applying continuous pressure. The continuous pressure application component 7 includes a lower pressure toothed plate 71, which meshes with a half gear 43. The bottom of the lower pressure toothed plate 71 is elastically connected to a telescopic moving plate 72 via an elastic telescopic column, and the telescopic moving plate 72 is telescopically connected to the pressure plate 45 via a telescopic rod. The top of the lower pressure toothed plate 71 is elastically connected to an elastic push rod 73, which is elastically connected to a fixed plate 5. A positioning plate 74 is slidably connected to the outside of the pressure plate 45, and the positioning plate 74 is fixedly connected to the inside of the plasma spraying body 2. The bottom of the inside of the positioning plate 74 is inclined and protruding. The lower pressure toothed plate 71 is used to mesh with the half gear 43 to convert the rotational force of the half gear 43 into vertical downward pressure, providing driving force for the continuous pressure application. The elastic telescopic column is used to provide an elastic connection between the lower pressure toothed plate 71 and the telescopic moving plate 72, so that the downward pressure can be flexibly transmitted. The telescopic moving plate 72 is used to avoid damage to the coating surface caused by rigid pressure. The telescopic rod is used to connect the telescopic moving plate 72 and the pressure plate 45, ensuring that the displacement of the telescopic moving plate 72 can be synchronously transmitted to the pressure plate 45, and at the same time providing lateral displacement limit support for the pressure plate 45. The elastic push rod 73 is used to provide elastic reset support for the lower pressure tooth plate 71, ensuring that the lower pressure tooth plate 71 can be smoothly lifted and reset after disengaging from the half gear 43. The positioning plate 74 is used to be fixedly connected to the inner side of the plasma spraying body 2, providing sliding support for the pressure plate 45. The inclined protrusion at the bottom of its inner side is used to guide the pressure plate 45 to complete the switching of pressing and lifting actions, ensuring that the pressure plate 45 can stably press the coating surface. The various components work together to apply segmented, continuous and stable pressure to the rolled coating, preventing the coating from cooling, shrinking and rebounding to generate new pores, locking the previous processing results, and ensuring the flatness and density stability of the coating after forming. The telescopic moving plate 72 is fixedly connected to a pull rod 8 at its top. A pressure column 9 is elastically connected to the bottom of the pull rod 8 via a compression spring, and the pressure column 9 is fixedly connected to the top of the telescopic vibrating plate 49. The pull rod 8 is fixed to the top of the telescopic moving plate 72 and moves synchronously with the downward pressing action of the telescopic moving plate 72. The pressure column 9 slides with the pull rod 8, synchronously transmitting the downward pressure of the pull rod 8 to the telescopic vibrating plate 49, causing one side of the telescopic vibrating plate 49 to press downwards. This achieves synchronous downward pressing action between the telescopic vibrating plate 49 and the pressure plate 45, ensuring that the telescopic vibrating plate 49 remains in close contact with the coating surface, thus improving the vibration and exhaust effect. See attached document Figure 2-8It also includes a heat flow assembly 10 for preventing overheating of the telescopic vibrating plate 49 and for insulating the pressure plate 45. The heat flow assembly 10 includes a heat-conducting plate 101, which is elastically connected to the interior of the pressure plate 45 through a heat insulation plate. The heat-conducting plate 101 has a heat release channel 102 inside, which is connected to a storage box 103 through a pipe. The storage box 103 is fixedly connected to the top of the telescopic vibrating plate 49. The telescopic vibrating plate 49 has a cavity inside, which is filled with a phase change material. The cavity is unidirectionally connected to the heat-conducting plate 101 through a delivery pipe. It should be noted that the medium flow direction in the delivery pipe is unidirectional, specifically from the cavity inside the telescopic vibrating plate 49 to the interior of the heat-conducting plate 101, and it cannot flow back in reverse. The unidirectional flow function can be achieved by using conventional techniques such as setting a one-way valve on the delivery pipe. The cavity inside the telescopic vibrating plate 49 is used to fill the phase change material, providing a space for heat absorption and storage. The phase change material is used to absorb the residual heat from the coating surface, and completes the storage and transfer of heat through solid-liquid phase change, while preventing overheating loss of the telescopic vibration plate 49. The conveying pipe is used to connect the cavity and the heat-conducting plate 101, providing a one-way conveying channel for the liquefied phase change material. The heat release channel 102 inside the heat-conducting plate 101 is used to contain the liquefied phase change material and transfer the heat carried by the phase change material to the pressure plate 45, providing constant temperature insulation for the pressure plate 45. The heat insulation plate is used to provide elastic support for the heat-conducting plate 101, while isolating the disorderly transfer of excess heat and ensuring the directionality of heat transfer. The storage box 103 is fixedly connected to the top of the telescopic vibration plate 49 to temporarily store the phase change material after heat release, providing a buffer space for the circulation and return of the phase change material. All components work together to realize the recovery and recycling of residual heat from the coating, provide stable constant temperature insulation for the pressure plate 45, avoid the internal stress cracking caused by excessive local cooling rate of the coating, and reduce the overall energy consumption of the equipment. The heat-conducting plate 101 is hinged to the outer side with a shape memory alloy strip 11, and the shape memory alloy strip 11 is fixedly connected to the inside of the pressure plate 45. The shape memory alloy strip 11 is used to fix the inside of the pressure plate 45 and is hinged to the heat-conducting plate 101, and can deform accordingly with temperature changes. When the temperature rises, the shape memory alloy strip 11 drives the heat-conducting plate 101 to move downward, so that the heat-conducting plate 101 and the heat-conducting end of the pressure plate 45 are tightly attached, thereby improving the heat transfer efficiency. When the temperature decreases, the shape memory alloy strip 11 drives the heat-conducting plate 101 to move upward, breaking the contact between the heat-conducting plate 101 and the heat-conducting end of the pressure plate 45. This prevents the phase change material from failing to reset properly due to excessively low temperatures, ensuring the controllability and stability of the heat transfer process. An extrusion plate 12 is slidably connected inside the cavity, and the extrusion plate 12 is fixedly connected to the vibration transmission plate 48. The extrusion plate 12 is used to fixally connect with the vibration transmission plate 48, and simultaneously slides inside the cavity. It can generate relative displacement synchronously with the feeding action of the telescopic vibration plate 49, applying extrusion force to the liquefied phase change material inside the cavity. This, in turn, pushes the phase change material to flow directionally along the conveying pipe into the heat-conducting plate 101, ensuring the continuous circulation and heat transfer of the phase change material. It is worth noting that the vibration spring, elastic telescopic column, compression spring, elastic push rod 73, elastic support block, elastic component of tension slide rod, and elastic connector of insulation plate involved in this technical solution are all implemented using existing mature structures, with the core function being to complete the elastic connection between corresponding components. In actual implementation, existing conventional limiting structures such as limiting sleeves can be added to prevent radial bending deformation of each elastic component during compression or reset. At the same time, during equipment use, each elastic component needs to be regularly maintained and replaced in a timely manner. Adaptive protective structures can also be added according to actual working conditions to meet the long-term stable use requirements of the equipment. It is also worth noting that each connection point of the phase change material flow path described in the text is equipped with a sealing structure to prevent medium leakage, thereby forming a reliable dynamic and static combined sealing system, effectively eliminating leakage and ensuring the pressure stability and energy transmission efficiency of the heat recovery system.

[0021] Working principle: In use, the aluminum material is placed in the spraying area of ​​the plasma spraying body 2, and then the plasma spraying body 2 is started. After the plasma spraying body 2 is started, its nozzle moves synchronously with the moving end, and gradually performs plasma spraying on the surface of the aluminum material. While the moving end of the plasma spraying body 2 drives the nozzle to move, it also drives the fixed plate 5 to move in the same direction. During the movement of the fixed plate 5, it drives the flattening roller 3 and the entire set of moving flattening mechanism 4 to feed synchronously along the spraying trajectory, so as to realize the synchronous operation of the spraying operation and the subsequent densification process on the same trajectory, which solves the problem of the separation between the spraying and densification processes of traditional equipment and the need for multiple transfers of the workpiece. During the feeding process of the fixed plate 5 driving the entire mechanism, the telescopic vibrating plate 49 is always positioned in front of the flattening roller 3, contacting the newly sprayed coating surface before the flattening roller 3; as the flattening roller 3 moves with the fixed plate 5, it drives the transmission gear 42 to move synchronously along the trajectory of the fixed toothed plate 41; the transmission gear 42 rotates due to the meshing transmission of the fixed toothed plate 41, thereby driving the inner half gear 43 to rotate synchronously; during the rotation of the half gear 43, it drives the inner pushing block 46 to rotate synchronously; during the rotation of the pushing block 46, it reciprocates to push the vibrating block 47 to move; when the vibrating block 47 moves, it compresses the vibration spring, and then interacts with the vibration transmission plate 4. The top of plate 8 contacts and generates continuous vibration; the vibration transmission plate 48 synchronously transmits the vibration to the telescopic vibration plate 49, and finally to the plasma coating that has just been sprayed on the aluminum surface; at this time, the sprayed coating still retains the residual heat of the spraying, and the coating particles are in a softened state. Continuous vibration can fully shake out the gas remaining inside the pores of the coating; the gas is discharged directionally along the exhaust hole at the bottom of the wear-resistant plate 6, which eliminates the problem of the surface particles first plastically deforming and closing the pores in the traditional rolling process, sealing the gas deep in the coating and forming a high-pressure cavitation. This eliminates the hidden danger of local stress concentration and peeling of the coating caused by the thermal expansion of the cavitation during the subsequent micro-arc oxidation process. After the telescopic vibrating plate 49 completes the pre-vibration venting, the flattening roller 3 moves synchronously to the area with the feed of the fixed plate 5 to perform a rolling operation on the coating after vibration venting. At this time, the residual gas inside the coating has been pre-expelled, and the pore channels are still in an open state. The rolling operation of the flattening roller 3 can directly compact the coating particles, close the pore channels, and not trap the gas inside the coating. The rolling process can also further squeeze out the micro-bubbles remaining in the shallow layer of the coating, realize secondary venting, greatly improve the density of the coating, and solve the problem that the traditional direct rolling process easily traps gas and reduces the coating adhesion and film quality. As the half gear 43 rotates continuously with the transmission gear 42, it meshes with the lower pressure plate 71, applying downward pressure to the lower pressure plate 71. Under this downward pressure, the lower pressure plate 71, through the elastic telescopic column at its bottom, elastically pushes the telescopic moving plate 72 downwards in sync. During this downward movement, the telescopic moving plate 72, via the telescopic rod, moves the pressing plate 45 downwards and presses against the coating surface, applying continuous and stable pressure to the rolled coating through elastic pressing. Simultaneously, as the telescopic moving plate 72 moves downwards, the top pull rod 8 and the lower pressure column 9 simultaneously press one side of the telescopic vibration plate 49 downwards, ensuring close contact between the telescopic vibration plate 49 and the coating surface. As the fixed plate 5 and the nozzle continue to advance, the coating is flattened. Plate 45 and telescopic vibration plate 49 can maintain their fixed positions in the corresponding pressing areas and continuously apply pressing force. When half gear 43 rotates to the position of meshing with lifting tooth plate 44, half gear 43 drives lifting tooth plate 44 to lift upward, thereby driving pressing plate 45 and telescopic vibration plate 49 to lift and reset synchronously. Then, when half gear 43 meshes with lower pressing tooth plate 71 again, the above pressing action is repeated, and the coating is continuously pressed in segments as the spraying feed progresses. This process can be completed after the rolling operation, while the coating still retains the residual heat of the spraying and the particles are still in a softened state. Constant pressure is applied to prevent the coating from cooling, shrinking, and rebounding to generate new pores, fully locking the results of the previous vibration venting and rolling densification, and ensuring the flatness and density stability of the coating after it is formed. During the process of the telescopic vibration plate 49 being pressed down and in close contact with the coating surface, it can continuously absorb the residual heat from the spraying of the coating surface, causing the phase change material in the cavity inside the telescopic vibration plate 49 to absorb heat and liquefy. As the nozzle and fixed plate 5 continue to advance, the extrusion plate 12 remains fixed relative to the vibration transmission plate 48, thereby applying extrusion force to the liquefied phase change material in the cavity. After being extruded, the liquefied phase change material enters the heat dissipation channel 102 inside the heat-conducting plate 101 through the conveying pipe, providing continuous heat supply to the pressure plate 45 and achieving constant temperature insulation of the pressure plate 45. Constant temperature insulation of the pressure plate 45 can avoid the problem of internal stress cracking caused by excessively rapid local cooling of the coating, further improving the uniformity and stability of the coating formation. The heat-conducting plate 101... A shape memory alloy strip 11 is hinged to the right side. After absorbing heat, the shape memory alloy strip 11 will deform, causing the heat-conducting plate 101 to move downward, so that the heat-conducting plate 101 is in close contact with the heat-conducting end of the pressure plate 45, thereby improving the heat transfer efficiency. When the temperature of the shape memory alloy strip 11 drops, it will deform in the opposite direction, causing the heat-conducting plate 101 to move upward, breaking the contact with the heat-conducting end of the pressure plate 45, thus preventing the phase change material from failing to reset properly due to excessively low temperature. It is worth noting that when the extrusion plate 12 extrudes the phase change material in the cavity along with the telescopic vibration plate 49, the phase change material enters the heat release channel 102. The original phase change material in the heat release channel 102 is pressed into the storage box 103 through the pipe and finally flows back into the cavity, completing the circulation of the phase change material. After the spraying is completed, the workpiece first enters the thermal diffusion transition device for a short stay. At this time, the surface of the workpiece still retains the residual heat of the spraying. The thermal diffusion transition device provides a heat preservation environment for the workpiece. The residual heat of the spraying causes the metal atoms in the sprayed layer to diffuse with the atoms of the aluminum substrate, forming a preliminary metallurgical bonding transition layer at the interface. This transition layer upgrades the original purely mechanical "anchoring" bond of the sprayed layer to a metallurgical bond, providing a higher bonding strength foundation for the subsequent micro-arc oxidation process, and fundamentally preventing the oxide film from peeling off due to insufficient bonding force between the oxide film and the substrate. After thermal diffusion is complete, the workpiece continues to be conveyed into the oxide body 1. The oxide body 1 contains a weakly alkaline electrolyte, and the workpiece is immersed in the electrolyte as the anode, while the stainless steel plate inside the oxide body 1 serves as the cathode. After the high-voltage pulse power supply is turned on, plasma micro-arc discharge is generated on the surface of the workpiece. Under the action of high temperature and high pressure in the micro-area, the sprayed coating that has been previously degassed and flattened is gradually transformed in situ into a dense alumina ceramic film. Since the pores of the sprayed coating have been pre-exhausted and compacted, the electrolyte will not penetrate to the interface along the pores during the micro-arc oxidation process, thus avoiding galvanic corrosion. At the same time, there are no residual cavities inside the coating, and local breakdown or ablation will not occur during high-voltage discharge. The final ceramic film layer is uniform, dense, has strong adhesion, and excellent corrosion resistance.

[0022] Thus, the aluminum workpiece has completed the entire process of plasma spraying, thermal diffusion transition, three-step degassing and flattening, and micro-arc oxidation, resulting in a composite ceramic film layer with high surface adhesion and high density.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum surface treatment oxidation device, comprising an oxidation body (1) and a plasma spraying body (2), wherein the oxidation body (1) and the plasma spraying body (2) are connected by a thermal diffusion transition device, and a flattening roller (3) is provided inside the plasma spraying body (2), characterized in that: Also includes: The movable flattening mechanism (4) for venting and flattening during spraying includes a fixed toothed plate (41), which is embedded and fixedly connected to the inner side of the plasma spraying body (2). A transmission gear (42) is meshed on the top of the fixed toothed plate (41). A half gear (43) is fixedly connected to the inner side of the transmission gear (42), and the inner side of the half gear (43) is fixedly connected to the outer side of the flattening roller (3). A lifting toothed plate (44) is meshed on one side of the half gear (43). A pressure plate (45) is telescopically slidably connected to one side of the lifting toothed plate (44). A pushing block (46) is fixedly connected to the inner side of the half gear (43). A vibration block (47) is slidably connected to the inner side of the pushing block (46). A vibration transmission plate (48) is provided at the bottom of the vibration block (47). A telescopic vibration plate (49) is slidably connected to one side of the vibration transmission plate (48).

2. The aluminum surface treatment oxidation equipment according to claim 1, characterized in that, A fixed plate (5) is slidably connected to one side of the lifting toothed plate (44), and the fixed plate (5) is slidably connected to the inner side of the plasma spraying body (2), and the fixed plate (5) is fixedly connected to the moving end of the nozzle of the plasma spraying body (2). The fixed plate (5) is rotatably connected to the flattening roller (3). The fixed plate (5) is elastically connected to the vibration block (47) through a vibration spring. The fixed plate (5) is elastically connected to the vibration transmission plate (48) through an elastic support block. The vibration transmission plate (48) is elastically connected to the telescopic vibration plate (49) through a tension slide rod.

3. The aluminum surface treatment oxidation equipment according to claim 1, characterized in that, The bottom of the telescopic vibration plate (49) is fixedly connected to an anti-wear plate (6), and the bottom of the anti-wear plate (6) is provided with an exhaust hole.

4. The aluminum surface treatment oxidation equipment according to claim 1, characterized in that, It also includes a continuous pressure assembly (7) for flattening and continuous pressure application. The continuous pressure assembly (7) includes a lower pressure tooth plate (71) and the lower pressure tooth plate (71) meshes with a half gear (43). The bottom of the lower pressure tooth plate (71) is elastically connected to a telescopic moving plate (72) through an elastic telescopic column. The telescopic moving plate (72) is telescopically connected to the pressure plate (45) through a telescopic rod. The top of the lower pressure tooth plate (71) is elastically connected to an elastic push rod (73), and the elastic push rod (73) is elastically connected to a fixed plate (5). The outer side of the pressure plate (45) is slidably connected to a positioning plate (74), and the positioning plate (74) is fixedly connected to the inner side of the plasma spraying body (2). The bottom of the inner side of the positioning plate (74) is inclined and protruding.

5. The aluminum surface treatment oxidation equipment according to claim 4, characterized in that, The top of the telescopic moving plate (72) is fixedly connected to a pull rod (8), and the bottom of the pull rod (8) is elastically connected to a lower pressure column (9) through a compression spring. The lower pressure column (9) is fixedly connected to the top of the telescopic vibration plate (49).

6. The aluminum surface treatment oxidation equipment according to claim 1, characterized in that, It also includes a heat flow assembly (10) for preventing the telescopic vibration plate (49) from overheating and for insulating the pressure plate (45). The heat flow assembly (10) includes a heat-conducting plate (101), and the heat-conducting plate (101) is elastically connected to the interior of the pressure plate (45) through a heat insulation plate. The heat-conducting plate (101) has a heat release channel (102) inside, and the heat release channel (102) is connected to a storage box (103) through a pipe. The storage box (103) is fixedly connected to the top of the telescopic vibration plate (49). The telescopic vibration plate (49) has a cavity inside, and the cavity is filled with a phase change material. The cavity is unidirectionally connected to the heat-conducting plate (101) through a delivery pipe.

7. The aluminum surface treatment oxidation equipment according to claim 6, characterized in that, The heat-conducting plate (101) is hinged to the outside of a shape memory alloy strip (11), and the shape memory alloy strip (11) is fixedly connected to the inside of the pressure plate (45).

8. The aluminum surface treatment oxidation equipment according to claim 6, characterized in that, The cavity is slidably connected to a compression plate (12), and the compression plate (12) is fixedly connected to the vibration transmission plate (48).

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