A device and method for repairing titanium oxide wear-resistant protective layer by in-situ anodic oxidation

Abstract

The application provides a device and a method for repairing a titanium oxide wear-resistant protective layer by in-situ anodic oxidation, and relates to the technical field of anodic oxidation repair. The device and the method are characterized by the following steps: firstly, mechanical polishing pretreatment is performed on a damaged area of a workpiece to be repaired; then, a suitable mold is selected according to the shape of the workpiece, and the mold is adsorbed and fixed on the surface of the workpiece to be repaired through a vacuum pump; secondly, an electrolyte is pumped into the mold so that the electrolyte covers the surface of the electrode; finally, anodic oxidation is performed under the condition of a pulse voltage, and a uniform titanium oxide wear-resistant protective layer is obtained on the surface of the workpiece. The application avoids irreversible damage caused by equipment disassembly during repair, reduces the downtime of the equipment, and has the characteristics of low cost and high efficiency. Meanwhile, the application is suitable for workpieces of various shapes and sizes by designing a replaceable and adjustable mold, and the application range is wider.

Description

Technical Field

[0001] This invention relates to the field of anodizing repair technology, and in particular to an apparatus and method for in-situ anodizing repair of titanium dioxide wear-resistant protective layers. Background Technology

[0002] Titanium oxide possesses excellent wear resistance, corrosion resistance, and high-temperature stability, enabling it to maintain good performance even under extreme conditions. However, over time and with changes in usage conditions, the titanium oxide protective layer may suffer from wear, scratches, and chemical corrosion, leading to a decline in its protective performance, thus requiring repair.

[0003] Existing methods for repairing protective layers mainly include spraying, brushing, and dipping. These methods are relatively simple, but the repaired protective layers often have insufficient adhesion, are prone to peeling, and their wear resistance and corrosion resistance are often inferior to the original protective layer. Furthermore, existing technologies may produce uneven coatings during the repair process, affecting overall performance, and require long curing times, leading to increased downtime and higher maintenance costs. They also cannot avoid secondary damage caused by disassembling the workpiece. The application scope of existing repair methods is also limited. For example, laser micro-cladding is suitable for repairing localized micro-cracks, but is inefficient and costly for large-scale repairs; plasma spraying requires specialized equipment and is difficult to handle deep holes or internal cavities; sol-gel penetration can only repair nanoscale cracks and is ineffective for macroscopic pores or peeling failures. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides an apparatus and method for in-situ anodizing repair of titanium dioxide wear-resistant protective layers. The invention first pre-treats the damaged area of ​​the workpiece by mechanical grinding; then, a suitable mold is selected according to the workpiece shape, and the mold is adsorbed and fixed onto the surface of the workpiece using a vacuum pump; next, electrolyte is pumped into the mold, so that the electrolyte covers the electrode surface; finally, anodizing is performed under pulsed voltage conditions, resulting in a uniform titanium dioxide wear-resistant protective layer on the workpiece surface. This invention avoids irreversible damage caused by equipment disassembly during repair, reduces equipment downtime, and features low cost and high efficiency. Furthermore, by designing replaceable and adjustable molds, it is suitable for workpieces of various shapes and sizes, thus broadening its application range. To achieve the above objectives, the technical solution is as follows: On one hand, the present invention provides an apparatus for in-situ anodizing repair of titanium dioxide wear-resistant protective layers, the apparatus comprising: A movable support module is used to support the electrolytic mold module and adjust the relative position between the electrolytic mold module and the damaged workpiece, while providing movable support for the anodizing repair device; An electrolyte module is used to prepare and store an electrolyte using water and reagents, and to pump the electrolyte into the electrolytic mold module, covering the cathode of the electrolytic mold module and the surface of the damaged workpiece. The electrolytic mold module is used to fix the damaged workpiece and provide a carrier for the electrolyte for targeted repair of the damaged parts of the workpiece; A vacuum fixing module is used to fix the damaged workpiece to the electrolytic mold module; The power module is used to provide pulse voltage for the anodizing repair device; The damaged workpiece is used as the anode of the anodizing repair device.

[0005] Optionally, the mobile support module includes: The device base serves as a support platform for the mobile support module; The movable wheels are used to move the anodizing repair device, and the movable wheels are installed on the lower part of the device base; Support columns are used to adjust the height of the electrolysis mold module relative to the damaged workpiece; A limiting unit is used to fix the position of the electrolytic mold module in terms of height. The limiting unit is installed on the support column. The rotating shaft is used to adjust the angle of the electrolysis mold module relative to the damaged workpiece. The first slide rail is used to adjust the horizontal distance between the electrolysis mold module and the damaged workpiece; The first fastening nut is used to fix the position of the electrolysis mold module on the first slide rail, and the first fastening nut is installed on the first slide rail.

[0006] Optionally, the electrolyte module includes: A storage tank for storing the electrolyte; A filling port for adding water and reagents is located at the top of the storage tank. A stirrer, used to stir the water and the reagent to prepare the electrolyte, is located at the bottom of the storage tank; A water pump is used to pump the electrolyte into the electrolysis mold module.

[0007] Optionally, the electrolysis mold module includes: The mold insulating shell serves as the outer shell of the electrolytic mold module and provides insulation protection for the anodizing electrolysis process. The second slide rail is used to slide and adjust the cathode plate to adjust the relative position of the cathode plate and the damaged workpiece. The second slide rail is fixed to the inner side of the mold insulating shell. The second slide rail includes a track and a moving block. The track is fixed to the mold insulating shell, and the moving block is connected to the cathode plate. The cathode plate, used as the cathode in the anodic oxidation electrolysis process, is fixed on the second slide rail and can slide along the second slide rail; A flexible mold material is used to support the electrolyte. The flexible mold material is attached to the damaged workpiece. The outer side of the flexible mold material is in contact with the cathode plate, and the inner side of the flexible mold material is in contact with the damaged workpiece. A spring is used to provide elastic support for the damaged workpiece; A handle is used to adjust the position of the movable block and the cathode plate; the handle is fixed to the movable block. The second fastening nut is used to tighten the handle so that the flexible mold material is in close contact with the damaged workpiece.

[0008] Optionally, the electrolytic mold module is designed in advance according to the applicable scenario of the damaged workpiece and has different shapes; the anodizing repair device repairs different damaged workpieces by matching the electrolytic mold module of different shapes.

[0009] Optionally, the vacuum fixing module includes: A vacuum pump is used to create a vacuum between the surface of the damaged workpiece and the electrolytic mold module. The shut-off valve is used for vacuum control and pressure recovery control between the surface of the damaged workpiece and the electrolytic mold module. A pressure gauge is used to detect the vacuum level between the surface of the damaged workpiece and the electrolytic mold module. The suction cup is used to adhere and fix the damaged workpiece.

[0010] Optionally, the power module includes: Power supply, used to provide electrolytic power for the anodizing repair device; A power switch is used to energize and de-energize the anodizing repair device for electrolysis. A wire is used to connect the positive terminal of the power supply to the damaged workpiece, and the negative terminal of the power supply to the cathode plate.

[0011] On the other hand, the present invention provides a method for in-situ anodizing repair of a titanium dioxide wear-resistant protective layer. This method is implemented using an apparatus for in-situ anodizing repair of a titanium dioxide wear-resistant protective layer, and includes: S1. Pre-treat the damaged workpiece by mechanically grinding to remove the damaged protective layer and obtain the pre-treated damaged workpiece. S2. Based on the pretreated damaged workpiece, select a suitable electrolytic mold and install it on the non-working anodizing repair device to obtain the first-stage repair device; S3. Based on the first-stage repair device, by adjusting the height of the support column and the angle of the rotating shaft of the first-stage repair device, the position of the electrolytic mold is adjusted so that the electrolytic mold adapts to the pre-treated damaged workpiece, thus obtaining the second-stage repair device. S4. According to the second-stage repair device, activate the vacuum pump to establish a vacuum state between the electrolytic mold and the surface of the pretreated damaged workpiece, and obtain the third-stage repair device. S5. Add water and reagents to the storage tank, turn on the stirrer to stir, and obtain the electrolyte; S6. Based on the third-stage repair device and the electrolyte, extract the electrolyte and inject it into the electrolytic mold so that the electrolyte completely covers the electrode surface of the electrolytic mold, thereby obtaining the fourth-stage repair device. S7. According to the fourth stage repair device, the positive terminal of the power supply is connected to the pretreated damaged workpiece, and the negative terminal is connected to the cathode plate. The power supply is turned on, and the electrolysis voltage, cycle, duty cycle and time of the power supply are controlled to perform anodizing on the surface of the pretreated damaged workpiece to obtain the repaired damaged workpiece.

[0012] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects: The above-mentioned solutions have several advantages. First, they employ an in-situ repair method, which does not require disassembling the damaged workpiece during the repair process, reducing downtime, improving production efficiency, and lowering costs. Second, they utilize anodizing, which is green, environmentally friendly, and pollution-free, and uses an environmentally friendly electrolyte. Third, they design molds of different shapes and sizes, allowing for selection based on the actual condition of the workpiece, thus broadening their applicability. Fourth, the mold support components have a rotating shaft, adjustable support columns, and sliding rails, which can adjust the position of the mold relative to the damaged workpiece, making it more flexible, efficient, and applicable to more scenarios. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a system block diagram of an embodiment of the device for in-situ anodic oxidation repair of titanium dioxide wear-resistant protective layer according to the present invention; Figure 2 This is a schematic diagram of the non-working state structure of an embodiment of the device for in-situ anodic oxidation repair of titanium dioxide wear-resistant protective layer of the present invention; Figure 3 This is a schematic diagram of the working state structure of an embodiment of the device for in-situ anodic oxidation repair of titanium dioxide wear-resistant protective layer of the present invention; Figure 4 This is an enlarged structural schematic diagram of the handle portion of an embodiment of the device for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to the present invention; Figure 5 This is a flowchart of an embodiment of the method for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to the present invention.

[0015] The following are the labels in the diagram: 1. Moving wheel; 2. Device base; 3. Power switch; 4. Power supply; 5. Support column; 6. Rotating shaft; 7. Vacuum pump; 8. Shut-off valve; 9. Pressure gauge; 10. Wire; 11. Storage tank; 12. Stirrer; 13. Liquid inlet; 14. Water pump; 15. First slide rail; 16. First fastening nut; 17. Mold insulating shell; 18. Second slide rail; 19. Cathode plate; 20. Damaged workpiece; 21. Spring; 22. Suction cup; 23. Handle; 24. Second fastening nut; 25. Electrolytic mold; 26. Limiting unit; 27. Flexible mold material; 181. Track; 182. Moving block. Detailed Implementation

[0016] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0017] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0018] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 The system block diagram of an embodiment of the in-situ anodic oxidation repair device for titanium dioxide wear-resistant protective layer of the present invention is shown below. Figure 2 The diagram shown is a schematic diagram of the non-working state structure of an embodiment of the device for in-situ anodic oxidation repair of titanium dioxide wear-resistant protective layer of the present invention, and as shown in the figure. Figure 3 The diagram shown is a schematic diagram of the working state structure of an embodiment of the device for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to the present invention. The present invention provides a device for in-situ anodizing repair of titanium dioxide wear-resistant protective layer, which includes: a moving support module, an electrolyte module, an electrolytic mold module, a vacuum fixing module, a power supply module, and a damaged workpiece 20. The movable support module is used to support the electrolytic mold module and adjust the relative position between the electrolytic mold module and the damaged workpiece 20, while providing movable support for the anodizing repair device; Specifically, the mobile support module includes: Device base 2 serves as a support platform for the mobile support module; A movable wheel 1 is used to move the anodizing repair device. The movable wheel 1 is installed on the lower part of the device base 2. Support column 5 is used to adjust the height of the electrolytic mold module relative to the damaged workpiece 20; The limiting unit 26 is used to fix the position of the electrolytic mold module in terms of height. The limiting unit 26 is installed on the support column 5. The rotating shaft 6 is used to adjust the angle of the electrolytic mold module relative to the damaged workpiece 20; The first slide rail 15 is used to adjust the horizontal distance between the electrolytic mold module and the damaged workpiece 20; The first fastening nut 16 is used to fix the position of the electrolysis mold module on the first slide rail 15. The first fastening nut 16 is installed on the first slide rail 15. An electrolyte module is used to prepare and store an electrolyte using water and reagents, and to pump the electrolyte into the electrolytic mold module, covering the cathode of the electrolytic mold module and the surface of the damaged workpiece 20. Specifically, the electrolyte module includes: Storage tank 11 is used to store the electrolyte; The liquid inlet 13 is used to add water and reagents, and the liquid inlet 13 is located at the top of the liquid storage tank 11; A stirrer 12 is used to stir the water and the reagent to prepare the electrolyte. The stirrer 12 is located at the bottom of the storage tank 11. Pump 14 is used to pump the electrolyte into the electrolysis mold module.

[0020] The electrolytic mold module is used to fix the damaged workpiece 20 and provide a carrier for the electrolyte for targeted repair of the damaged parts of the workpiece 20; Specifically, the electrolysis mold module includes: The mold insulating housing 17 serves as the housing of the electrolytic mold module and provides insulation protection for the anodizing electrolysis process. The second slide rail 18 is used to slide and adjust the cathode plate 19 to adjust the relative position of the cathode plate 19 and the damaged workpiece 20. The second slide rail 18 is fixed to the inner side of the mold insulating shell 17. The second slide rail 18 includes a track 181 and a moving block 182. The track 181 is fixed on the mold insulating shell 17, and the moving block 182 is connected to the cathode plate 19. The cathode plate 19 is used as the cathode in the anodic oxidation electrolysis process. The cathode plate 19 is fixed on the second slide rail 18 and can slide along the second slide rail 18. The flexible mold material 27 is used to support the electrolyte. The flexible mold material 27 is attached to the damaged workpiece 20. The outer side of the flexible mold material 27 is in contact with the cathode plate 19, and the inner side of the flexible mold material 27 is in contact with the damaged workpiece 20. Spring 21 is used to elastically support the damaged workpiece 20; Handle 23 is used to adjust the position of the movable block 182 and the cathode plate 19. The handle 23 is fixed to the movable block 182. A partial enlarged view of the handle 23 is shown below. Figure 4 ; The second fastening nut 24 is used to fasten the handle 23 so that the flexible mold material 27 is in close contact with the damaged workpiece 20.

[0021] Furthermore, the electrolytic mold module is designed in advance according to the applicable scenario of the damaged workpiece 20 and has different shapes; the anodizing repair device repairs different damaged workpieces 20 by matching the electrolytic mold modules of different shapes.

[0022] A vacuum fixing module is used to fix the damaged workpiece 20 to the electrolytic mold module; Specifically, the vacuum fixing module includes: Vacuum pump 7 is used to evacuate the surface of the damaged workpiece 20 and the electrolytic mold module; The shut-off valve 8 is used for vacuum control and pressure recovery control between the surface of the damaged workpiece 20 and the electrolytic mold module; Pressure gauge 9 is used to detect the vacuum level between the surface of the damaged workpiece 20 and the electrolytic mold module; The suction cup 22 is used to adsorb and fix the damaged workpiece 20.

[0023] The power module is used to provide pulse voltage for the anodizing repair device; Specifically, the power module includes: Power source 4 is used to provide electrolytic power for the anodizing repair device; Power switch 3 is used to power on and off the electrolysis of the anodizing repair device; The wire 10 is used to connect the positive terminal of the power supply 4 to the damaged workpiece 20, and the negative terminal of the power supply 4 to the cathode plate 19. Furthermore, power supply 4 uses pulse electrolysis to promote uniform growth of the oxide film and reduce film defects. The electrolysis voltage, cycle, duty cycle and time are set according to actual needs to perform anodic oxidation and repair the wear-resistant protective layer of titanium dioxide.

[0024] The damaged workpiece 20 is used as the anode of the anodizing repair device.

[0025] like Figure 5This is a flowchart of an embodiment of a method for in-situ anodizing repair of titanium dioxide wear-resistant protective layer. The flowchart illustrates a method for in-situ anodizing repair of titanium dioxide wear-resistant protective layer provided by the present invention, which is implemented by an apparatus for in-situ anodizing repair of titanium dioxide wear-resistant protective layer. Specifically, the method for in-situ anodizing repair of titanium dioxide wear-resistant protective layers includes: S1. Pre-treat the damaged workpiece by mechanically grinding to remove the damaged protective layer and obtain the pre-treated damaged workpiece. S2. Based on the pretreated damaged workpiece, select a suitable electrolytic mold 25 and install it on the non-working anodizing repair device to obtain the first-stage repair device; S3. Based on the first-stage repair device, by adjusting the height of the support column and the angle of the rotating shaft of the first-stage repair device, the position of the electrolytic mold 25 is adjusted so that the electrolytic mold 25 adapts to the pre-treated damaged workpiece, thus obtaining the second-stage repair device. S4. According to the second-stage repair device, activate the vacuum pump to establish a vacuum state between the electrolytic mold 25 and the surface of the pretreated damaged workpiece, and obtain the third-stage repair device. S5. Add water and reagents to the storage tank, turn on the stirrer to stir, and obtain the electrolyte; S6. Based on the third-stage repair device and the electrolyte, extract the electrolyte and inject it into the electrolytic mold 25 so that the electrolyte completely covers the electrode surface of the electrolytic mold 25, thereby obtaining the fourth-stage repair device. S7. According to the fourth stage repair device, the positive terminal of the power supply is connected to the pretreated damaged workpiece, and the negative terminal is connected to the cathode plate. The power supply is turned on, and the electrolysis voltage, cycle, duty cycle and time of the power supply are controlled to perform anodizing on the surface of the pretreated damaged workpiece to obtain the repaired damaged workpiece.

[0026] Furthermore, for pipe workpieces, the anodizing repair process is as follows: First, pre-treat the surface of the damaged workpiece by grinding away part of the protective layer, making it the same thickness as the remaining protective layer at the damaged area. Prepare a 3 mol / L solution in the storage tank. -1Using phosphoric acid solution as the electrolyte, an arc-shaped mold is selected. After adjusting and fixing its position, the handle is pulled to make the device circle the workpiece once via the second slide rail. The rotating shaft and support column are adjusted to ensure the device is at a suitable height and angle. The cathode plate is connected to the negative terminal of the power supply, and the positive terminal is connected to the damaged workpiece. The vacuum pump is started to establish a vacuum between the mold and the workpiece surface. Electrolyte is injected to cover the anode and cathode surfaces. The power is turned on, and the on-state voltage is set to 500 V, the off-state voltage to 0 V, the cycle to 30 seconds, the duty cycle to 0.5, and the effective on-state time to 10 hours. After oxidation is complete, the shut-off valve is opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The device is removed, and a uniform titanium oxide protective layer is obtained on the surface of the damaged workpiece, completing the repair.

[0027] Furthermore, the anodizing repair process for titanium alloy armor plates is as follows: First, pre-treat the surface of the damaged workpiece by grinding away part of the protective layer, making it the same thickness as the remaining protective layer at the damaged area. Prepare a 3 mol / L solution in the storage tank. -1 Phosphoric acid solution was used as the electrolyte. A suitable mold was selected, and its position was adjusted before installation and fixation. The rotating shaft and support column were adjusted to ensure the equipment was at the appropriate height and angle. The cathode plate was connected to the negative terminal of the power supply, and the positive terminal was connected to the damaged workpiece. The vacuum pump was started to establish a vacuum between the mold and the surface of the damaged workpiece. Electrolyte was injected to cover the surfaces of the anode and cathode. The power was turned on, and the on-state voltage was set to 300 V, the off-state voltage to 0 V, the cycle to 30 seconds, the duty cycle to 0.5, and the effective on-state time to 8 hours. After oxidation was completed, the shut-off valve was opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The equipment was removed, and a uniform titanium oxide protective layer was obtained on the surface of the damaged workpiece, completing the repair.

[0028] Furthermore, for chemical reaction vessels, the anodizing repair process is as follows: First, pre-treat the surface of the damaged workpiece by grinding away part of the protective layer, making it the same thickness as the remaining protective layer at the damaged area. Prepare a 3 mol / L solution in the storage tank. -1 Phosphoric acid solution was used as the electrolyte. A suitable mold was selected, and its position was adjusted before installation and fixation. The rotating shaft and support column were adjusted to ensure the equipment was at the appropriate height and angle. The cathode plate was connected to the negative terminal of the power supply, and the positive terminal was connected to the damaged workpiece. The vacuum pump was started to establish a vacuum between the mold and the surface of the damaged workpiece. Electrolyte was injected to cover the surfaces of the anode and cathode. The power was turned on, and the on-state voltage was set to 100 V, the off-state voltage to 0 V, the cycle to 30 seconds, the duty cycle to 0.4, and the effective on-state time to 5 hours. After oxidation was completed, the shut-off valve was opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The electrolyte was drained, the equipment was removed, and a uniform titanium oxide protective layer was obtained on the surface of the damaged workpiece, completing the repair.

[0029] Furthermore, for industrial pumps, the anodizing repair process is as follows: First, pre-treat the surface of the damaged workpiece by grinding away part of the protective layer, making it the same thickness as the remaining protective layer at the damaged area. Prepare a 1 mol L solution in the storage tank. -1 Phosphoric acid solution is used as the electrolyte. A suitable mold is selected, and its position is adjusted before installation and fixation. The rotating shaft and support column are adjusted to ensure the equipment is at the appropriate height and angle. The cathode plate is connected to the negative terminal of the power supply, and the positive terminal is connected to the damaged workpiece. The vacuum pump is started to establish a vacuum between the mold and the surface of the damaged workpiece. Electrolyte is injected to cover the surfaces of the anode and cathode. The power is turned on, and the on-state voltage is set to 100 V, the off-state voltage to 0 V, the cycle to 20 seconds, the duty cycle to 0.4, and the effective on-state time to 1 hour. After oxidation is complete, the shut-off valve is opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The equipment is then removed, and a uniform titanium oxide protective layer is obtained on the surface of the damaged workpiece, completing the repair.

[0030] Furthermore, the anodizing repair process for titanium alloy drill bits on oilfield equipment is as follows: First, the surface of the damaged workpiece is pretreated by grinding away part of the protective layer, making it the same thickness as the residual protective layer at the damaged area. Then, 0.8 mol L⁻¹ is prepared in the storage tank. -1 Phosphoric acid solution was used as the electrolyte. A suitable mold was selected, and its position was adjusted before installation and fixation. The rotating shaft and support column were adjusted to ensure the equipment was at the appropriate height and angle. The cathode plate was connected to the negative terminal of the power supply, and the positive terminal was connected to the damaged workpiece. The vacuum pump was started to establish a vacuum between the mold and the surface of the damaged workpiece. Electrolyte was injected to cover the surfaces of the anode and cathode. The power was turned on, and the on-state voltage was set to 50 V, the off-state voltage to 0 V, the cycle to 20 seconds, the duty cycle to 0.3, and the effective on-state time to 30 minutes. After oxidation was completed, the shut-off valve was opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The equipment was removed, and a uniform titanium oxide protective layer was obtained on the surface of the damaged workpiece, completing the repair.

[0031] Furthermore, for medical surgical instruments, the anodizing repair process is as follows: First, the surface of the damaged workpiece is pretreated by grinding away part of the protective layer, making it the same thickness as the residual protective layer at the damaged area. Then, 0.5 mol L⁻¹ is prepared in the storage tank. -1Phosphoric acid solution was used as the electrolyte. A suitable mold was selected, and its position was adjusted before installation and fixation. The rotating shaft and support column were adjusted to ensure the equipment was at the appropriate height and angle. The cathode plate was connected to the negative terminal of the power supply, and the positive terminal was connected to the damaged workpiece. The vacuum pump was started to establish a vacuum between the mold and the surface of the damaged workpiece. Electrolyte was injected to cover the surfaces of the anode and cathode. The power was turned on, and the on-state voltage was set to 30 V, the off-state voltage to 0 V, the cycle to 10 seconds, the duty cycle to 0.2, and the effective on-state time to 20 minutes. After oxidation was completed, the shut-off valve was opened to gradually restore the pressure between the mold and the damaged workpiece to normal. The equipment was removed, and a uniform titanium oxide protective layer was obtained on the surface of the damaged workpiece, completing the repair.

[0032] This invention provides an apparatus and method for in-situ anodizing repair of titanium dioxide wear-resistant protective layers. The invention first pre-treats the damaged area of ​​the workpiece by mechanical grinding; then, a suitable mold is selected according to the workpiece shape, and the mold is adsorbed and fixed onto the surface of the workpiece using a vacuum pump; next, electrolyte is pumped into the mold, so that the electrolyte covers the electrode surface; finally, anodizing is performed under pulsed voltage conditions, resulting in a uniform titanium dioxide wear-resistant protective layer on the workpiece surface. This invention avoids irreversible damage caused by equipment disassembly during repair, reduces equipment downtime, and features low cost and high efficiency. Furthermore, by designing replaceable and adjustable molds, this invention is suitable for workpieces of various shapes and sizes, thus broadening its application range.

[0033] It is understood that the present invention has been described through the above embodiments and should not be construed as limiting the implementation and scope of the present invention. Those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A device for in-situ anodizing repair of titanium dioxide wear-resistant protective layers, characterized in that, The device includes: A movable support module is used to support the electrolytic mold module and adjust the relative position between the electrolytic mold module and the damaged workpiece, while providing movable support for the anodizing repair device; An electrolyte module is used to prepare and store an electrolyte using water and reagents, and to pump the electrolyte into the electrolytic mold module, covering the cathode of the electrolytic mold module and the surface of the damaged workpiece; The electrolytic mold module is used to fix the damaged workpiece and provide a carrier for the electrolyte for targeted repair of the damaged parts of the workpiece; A vacuum fixing module is used to fix the damaged workpiece to the electrolytic mold module; The power module is used to provide pulse voltage for the anodizing repair device; The damaged workpiece is used as the anode of the anodizing repair device; The mobile support module includes: The device base serves as a support platform for the mobile support module; The movable wheels are used to move the anodizing repair device, and the movable wheels are installed on the lower part of the device base; Support columns are used to adjust the height of the electrolytic mold module relative to the damaged workpiece; A limiting unit is used to fix the electrolytic mold module in terms of height, and the limiting unit is installed on the support column; A rotating shaft is used to adjust the angle of the electrolytic mold module relative to the damaged workpiece. The first slide rail is used to adjust the horizontal distance between the electrolysis mold module and the damaged workpiece; The first fastening nut is used to fix the position of the electrolysis mold module on the first slide rail. The first fastening nut is installed on the first slide rail. The electrolysis mold module includes: An insulating outer shell for use as the outer shell of the electrolytic mold module and to provide insulation protection for the anodizing electrolysis process; The second slide rail is used to slide and adjust the cathode plate to adjust the relative position of the cathode plate and the damaged workpiece. The second slide rail is fixed to the inner side of the mold insulating shell. The second slide rail includes a track and a moving block. The track is fixed on the mold insulating shell, and the moving block is connected to the cathode plate. The cathode plate is used as the cathode in the anodic oxidation electrolysis process. The cathode plate is fixed on the second slide rail and can slide along the second slide rail. A flexible mold material is used to support the electrolyte. The flexible mold material is attached to the damaged workpiece. The outer side of the flexible mold material is in contact with the cathode plate, and the inner side of the flexible mold material is in contact with the damaged workpiece. A spring is used to elastically support the damaged workpiece; A handle is used to adjust the position of the movable block and the cathode plate, and the handle is fixed to the movable block; The second fastening nut is used to fasten the handle so that the flexible mold material is in close contact with the damaged workpiece; The vacuum fixing module includes: A vacuum pump is used to evacuate the surface of the damaged workpiece from the electrolytic mold module. A shut-off valve is used for vacuum control and pressure recovery control between the surface of the damaged workpiece and the electrolytic mold module. A pressure gauge is used to detect the vacuum level between the surface of the damaged workpiece and the electrolytic mold module; A suction cup is used to adhere and fix the damaged workpiece.

2. The apparatus for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to claim 1, characterized in that, The electrolyte module includes: A storage tank for storing the electrolyte; A liquid inlet is provided for adding water and reagents, and the liquid inlet is located at the top of the storage tank. A stirrer is used to stir the water and the reagent to prepare the electrolyte, and the stirrer is located at the bottom of the storage tank; A water pump is used to pump the electrolyte into the electrolysis mold module.

3. The apparatus for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to claim 1, characterized in that, The electrolytic mold module is designed in advance according to the applicable scenario of the damaged workpiece and has different shapes; the anodizing repair device repairs different damaged workpieces by matching the electrolytic mold modules of different shapes.

4. The apparatus for in-situ anodizing repair of titanium dioxide wear-resistant protective layer according to claim 1, characterized in that, The power module includes: A power source, used to provide electrolytic power to the anodic oxidation repair device; A power switch is used to energize and de-energize the anodizing repair device for electrolysis. A wire is used to connect the positive terminal of the power supply to the damaged workpiece, and the negative terminal of the power supply to the cathode plate.

5. A method for in-situ anodizing repair of a titanium dioxide wear-resistant protective layer, wherein the method is implemented by the apparatus for in-situ anodizing repair of a titanium dioxide wear-resistant protective layer according to any one of claims 1-4, characterized in that, The method includes: S1. Pre-treat the damaged workpiece by mechanically grinding to remove the damaged protective layer and obtain the pre-treated damaged workpiece. S2. Based on the pre-treated damaged workpiece, select a suitable electrolytic mold module and install it on the non-working anodizing repair device to obtain the first-stage repair device; S3. Based on the first-stage repair device, by adjusting the height of the support column and the angle of the rotating shaft of the first-stage repair device, the position of the electrolytic mold module is adjusted so that the electrolytic mold module adapts to the pre-treated damaged workpiece, thereby obtaining the second-stage repair device. S4. According to the second-stage repair device, activate the vacuum pump to establish a vacuum state between the electrolytic mold module and the pretreated damaged workpiece surface, and obtain the third-stage repair device. S5. Add water and reagents to the storage tank, turn on the stirrer to stir, and obtain the electrolyte; S6. Based on the repair device of the third stage and the electrolyte, extract the electrolyte and inject it into the electrolytic mold module so that the electrolyte completely covers the electrode surface of the electrolytic mold module to obtain the fourth stage repair device. S7. According to the repair device of the fourth stage, the positive terminal of the power supply is connected to the pre-treated damaged workpiece, the negative terminal of the power supply is connected to the cathode plate, the power supply is turned on, and the electrolysis voltage, cycle, duty cycle and time of the power supply are controlled to perform anodizing on the surface of the pre-treated damaged workpiece to obtain the repaired damaged workpiece.

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