Titanium-aluminum alloy dealloying and aluminum porous structure collaborative processing device and method

Abstract

The invention discloses a titanium-aluminum alloy dealloying and aluminum porous structure collaborative processing device and method. The device comprises a workbench, a workpiece exchange mechanism, a collaborative processing groove body and a direct-current power supply, the collaborative processing groove body is mounted on the workbench; a partition plate is arranged in the collaborative processing tank body; the partition plate is made of a conductive material and divides an inner cavity of the collaborative processing tank body into an electrolysis cavity and an electroforming cavity which are independent from each other; the part exchange mechanism comprises an exchange driving mechanism, a mounting plate and two template clamping structures; according to the invention, electroforming and electrolysis operations for preparing an aluminum porous structure and dealloying treatment of a titanium-aluminum alloy workpiece can be simultaneously carried out through the same device, so that the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical manufacturing, and in particular relates to a method and device for collaboratively processing dealloyed difficult-to-process materials and electrolysis-electroforming. Technical Background The manufacturing of aircraft engines is a highly complex and technology-intensive field. Extremely high requirements are placed on the materials, structures, and manufacturing processes of aircraft engines. Aircraft engines require materials that combine superb high-temperature resistance and strength. At the same time, the air intake system of aircraft engines is also a key link in its manufacturing process. Filters are required to prevent insects, dust, and other external particles from entering the engine. These filters often use a complex and special layered porous structure.

[0003] Titanium-aluminum alloy, a material combining high strength and low density, exhibits exceptional performance in building and functional materials due to its unique physical and chemical properties, and has also found widespread application in aerospace. However, its unique material properties present numerous challenges in processing. To overcome these difficulties, chemical reactions can be used to effectively separate and remove impurities or alloying elements from the metal, making the metal structure loose and porous, thereby reducing cutting forces and enabling efficient and low-damage processing. This method is known as dealloying of titanium-aluminum alloys. Similarly, non-woven microporous arrays are core components of metal products such as aviation micro-precision filters and screens, as well as damping bushings in high-pressure compressor air ducts of aircraft engines, vibration isolation devices for afterburners, and heat shields. Their geometric features play a decisive role in product performance, but their unique structure also makes processing cumbersome and difficult. Conventional processing methods involve secondary or multiple electroforming processes.

[0004] However, it is worth noting that the traditional dealloying process has the problems of high pollution and high consumption, which has led to the continuous increase of waste titanium-aluminum alloy resources in my country. Therefore, the dealumination and titanium-enrichment treatment of titanium-aluminum alloys has become a research direction that needs urgent attention. However, there are relatively few studies in this field at present; the patent with publication number CN115707798A provides a method for preparing metallic Ti based on low-temperature molten salt electrolysis of titanium-aluminum alloys. By cleverly combining the aluminothermic reduction method with the low-temperature molten salt electrolysis method, it can not only prepare high-purity metallic Ti, but also obtain high-purity metallic Al as a by-product. This method greatly reduces energy consumption and effectively reduces production costs.

[0005] However, although the method of low-temperature molten salt electrolysis of titanium-aluminum alloy has greatly reduced energy consumption and pollution, the degree of dealloying is not high and the chemical reaction at the cathode is not fully utilized, which is also a consumption of energy. There is currently no relevant research on the reaction of the positive and negative electrodes in the electrochemical reaction to achieve the coordinated conduct of electrolysis and electroforming.

[0006] Therefore, the problem is solved by combining mask electroforming and mask electrolytic processing, two processing methods with their own characteristics. Through the electroforming reaction, a porous and loose structure is prepared on the surface of the titanium-aluminum alloy material and adsorbed onto the microporous material. Then, through mask electrolysis, a more complex microporous structure can be further prepared. The purpose is to combine the advantages of each method and avoid the shortcomings. While solving the dealloying of titanium-aluminum alloy, the electrolysis and electroforming reactions of processing microporous materials can effectively cooperate. However, the forming mechanisms of these two processing methods are very different, making their integration extremely challenging.

[0007] Titanium-aluminum alloys and porous aluminum materials have a certain degree of correlation and complementarity in the acquisition of raw materials and subsequent processing. These two materials not only overlap in chemical composition, but also have potential synergistic effects during their preparation. This allows for efficient and full utilization of raw material resources during the dealloying of titanium-aluminum alloys to form specific structures and the production of porous aluminum structures, achieving optimal resource allocation and recycling. Summary of the Invention

[0008] To address these issues, the present invention provides a method and apparatus for electrolysis of titanium-aluminum alloys and processing of microporous materials. This method, through a linkage mechanism, effectively coordinates the electrolysis and electroforming processes, ensuring that the alloy material meets the different electrolyte requirements of the electrolysis and electroforming processes while also meeting the temperature requirements of both processes. Furthermore, it enables a cyclical operation of the two electrochemical reactions, fully utilizing energy and improving efficiency.

[0009] In a first aspect, the present invention provides a device for collaborative processing of titanium-aluminum alloy dealloying and aluminum porous structure, comprising a workbench, a workpiece exchange mechanism, a collaborative processing tank, and a DC power supply; the collaborative processing tank is mounted on the workbench; a partition is provided in the collaborative processing tank; the partition is made of a conductive material and separates the inner cavity of the collaborative processing tank into an electrolysis chamber and an electroforming chamber that are independent of each other; The workpiece swap mechanism includes a swap drive mechanism, a mounting plate, and two template clamping structures; the two template clamping structures are installed on the mounting plate at intervals; the swap drive mechanism is used to drive the two template clamping structures into the electrolysis chamber and the electroforming chamber, respectively, and can exchange the positions of the two template clamping structures; the DC power supply has three electrode structures, namely a positive electrode interface, an intermediate interface, and a negative electrode interface; the potential of the intermediate interface is between the potentials of the positive electrode interface and the negative electrode interface; During operation, the titanium-aluminum alloy workpiece is installed on the side of the partition close to the electroforming chamber; the two template clamping structures each clamp the porous template and immerse them in the electrolyte of the electrolysis chamber and the electroforming chamber respectively; the porous template immersed in the electrolysis chamber is connected to the positive electrode interface of the DC power supply; the porous template immersed in the electroforming chamber is connected to the negative electrode interface of the DC power supply.

[0010] Preferably, it further comprises a frame and an X-axis displacement mechanism; the X-axis displacement mechanism is mounted on the frame; and the workbench is driven to slide by the X-axis displacement mechanism.

[0011] Preferably, the partition is plugged into and matched with a slot structure in the middle of the cooperatively processed tank body.

[0012] Preferably, the porous template is a flat plate structure having a plurality of through holes arranged in an array.

[0013] Preferably, the exchange drive mechanism includes a Y-axis displacement mechanism, a Z-axis displacement mechanism and a rotation drive mechanism; the Z-axis displacement mechanism is installed on the Y-axis displacement mechanism; the rotation drive mechanism is installed on the Z-axis displacement mechanism; and the middle part of the mounting plate is installed on the rotation drive mechanism.

[0014] Preferably, the electrolyte filled in the electroforming chamber is 1-butyl-3-methylimidazolium chloroaluminate; and NaNO3 solution is added to the electrolyte filled in the electrolytic chamber.

[0015] Preferably, a workpiece mounting structure for clamping a titanium-aluminum alloy workpiece is provided on the partition near the electroforming chamber.

[0016] In a second aspect, the present invention provides a method for collaboratively processing titanium-aluminum alloy dealloying and aluminum porous structure, which uses the aforementioned titanium-aluminum alloy dealloying and aluminum porous structure collaborative processing device; the collaborative processing method comprises the following steps: Step 1: Using a porous template without an aluminum metal layer formed on its surface as an electroforming electrode, and covering one side of the electroforming electrode with an insulating layer; Using a porous template with an aluminum metal layer formed on one side as an electrolysis electrode; Covering the side of the electrolysis electrode with the aluminum metal layer formed with an insulating layer; Mounting a titanium-aluminum alloy workpiece with its processed surface exposed on the side of the partition near the electroforming chamber; Step 2: Immerse the electroforming electrode in the electrolyte of the electroforming chamber, and immerse the electrolysis electrode in the electrolyte of the electrolysis chamber; connect the electroforming electrode to the negative terminal of the DC power supply; connect the electrolysis electrode to the positive terminal of the DC power supply; start the DC power supply to cause an electrochemical reaction; During the reaction process, the side of the partition close to the electrolytic chamber combines with the metal ions in the electrolyte to form a metal coating; the titanium-aluminum alloy workpiece installed on the partition close to the electroforming chamber is dealloyed on the processed surface, and the aluminum atoms are converted into aluminum ions and enter the electrolyte in the electroforming chamber; a reduction reaction occurs on the electroforming electrode, and an aluminum metal layer with a trumpet-shaped pore structure grows on the surface of the electroforming electrode away from the insulating layer; an oxidation reaction occurs on the electrolytic electrode, and the pore structure of the aluminum metal layer is electrolyzed, so that the aluminum metal layer forms an aluminum porous structure with a target shape, that is, the pore structure of the aluminum metal layer presents an hourglass shape.

[0017] Steps 1 and 2 are repeated to carry out cyclic production of aluminum porous structures and dealloying of different titanium-aluminum alloy workpieces.

[0018] Preferably, in the first reaction cycle of the process, an aluminum sheet is used as the electrolysis electrode instead of the porous template with an aluminum metal layer formed on one side.

[0019] Preferably, in step 2, the amount of aluminum alloy layer generated on the electroforming electrode and the amount of aluminum alloy layer removed on the electroforming electrode are controlled by adjusting the reaction time and the potential of the intermediate interface of the DC power supply.

[0020] The present invention has the beneficial effects: 1. This invention integrates the electroforming and electrolysis steps for producing porous aluminum structures, as well as the dealloying process for titanium-aluminum alloy workpieces, into a single device. This improves the integration of processing equipment and reduces equipment costs. Furthermore, it fully utilizes the reactions of different electrodes during the electrochemical reaction, reducing overall energy consumption. It also allows for electrolyte recycling, preventing the generation of impurities, ensuring stable electrolyte performance, and reducing the frequency of electrolyte replacement. This not only reduces electrolyte usage but also mitigates the environmental burden associated with electrolyte disposal. This reduces electrolyte costs while also complying with environmental requirements.

[0021] 2. The present invention adopts an electrochemical treatment technology for difficult-to-process alloy materials. This technology cleverly integrates the two major electrochemical reactions of mask electrolysis and mask electroforming, achieving seamless collaborative operation of the two within the same process system. While solving the problem of dealloying of difficult-to-process alloy materials, it also fully utilizes resources to process and produce a non-woven micropore array material.

[0022] 3. This invention utilizes a workpiece swapping mechanism to interchange the positions of the two porous templates, achieving synchronized operation of the electroforming and electrolysis processes. The current density ratio between the electroforming and electrolysis electrodes can be varied by adjusting the reaction time and the potential of the DC power supply's intermediate interface. This allows for the regulation of the electroforming and electrolytic forming rates of the aluminum alloy layer, resulting in an aluminum porous structure of ideal dimensions.

[0023] 4. This invention can be used as experimental equipment for studying the dealloying of titanium-aluminum alloys and the production conditions of porous aluminum structures, helping to simplify the processes and improve experimental efficiency. It avoids the need for multiple disassembly and reassembly of workpieces, reducing not only experimental preparation time and material loss, but also the risk of errors introduced by improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the drawings of this design will be described below and the key components will be numbered.

[0025] Figure 1 It is the overall structural diagram of the present invention.

[0026] Figure 2 This is a schematic diagram of the installation position of the collaborative processing tank body in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the workpiece swapping mechanism in the present invention.

[0028] Figure 4 Schematic diagram of the collaborative processing process in the present invention.

[0029] Figure numerals: 1. Frame; 2. X-axis displacement mechanism; 3. Workbench; 4. Co-processing tank; 4-1. Partition; 4-2. Electrolysis chamber; 4-3. Electroforming chamber; 5. DC power supply; 6. Mounting plate; 7. Template clamping structure; 8. Y-axis displacement mechanism; 9. Z-axis displacement mechanism; 10. Rotary drive mechanism; 11. Porous template; 12. Insulation layer; 13. Aluminum porous structure. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example This embodiment aims to independently and efficiently perform the dealloying electrolytic reaction of titanium-aluminum alloy materials and the electroforming-electrolytic coordinated fabrication of metal micropore arrays. These two electrochemical reactions each involve complex and critical intermediate processes; the dealloying of titanium-aluminum alloys primarily focuses on the precise removal of metallic elements. Through specific conditions, the aluminum component in the titanium-aluminum alloy is selectively dissolved in the electrolyte, thereby achieving structural transformation and optimizing performance.

[0032] A device for co-processing titanium-aluminum alloy dealloying and aluminum porous structures comprises a frame 1, an X-axis displacement mechanism 2, a worktable 3, a workpiece swapping mechanism, a co-processing tank 4, and a DC power supply 5. The X-axis displacement mechanism 2 comprises an X-axis guide rail and a slide cylinder mounted on the frame 1. The bottom surface of the worktable 3 is slidably connected to the two X-axis guide rails via sliders. The middle portion of the bottom surface of the worktable 3 is fixed to a sliding portion on the slide cylinder. The co-processing tank 4 is fixed to the top surface of the worktable 3. A partition 4-1 is provided in the co-processing tank 4. The partition 4-1 is made of metal and separates the inner cavity of the co-processing tank 4 into an electrolysis chamber 4-2 and an electroforming chamber 4-3, which are mutually independent. The metal material of the partition 4-1 has a higher potential than that of the aluminum, thereby preventing the partition from participating in the electrochemical reaction. In this embodiment, the partition 4-1 is made of a titanium metal plate. A workpiece mounting structure is provided on the side of the partition 4-1 near the electroforming chamber 4-3. The workpiece mounting structure is used for clamping the dealloyed titanium-aluminum alloy workpiece.

[0033] In some embodiments, the partition 4 - 1 is plugged into a slot structure in the middle of the cooperatively processed tank body 4 to facilitate replacement of the partition 4 - 1 .

[0034] The workpiece swap mechanism includes a swap drive mechanism, a mounting plate 6, and two template clamping structures 7. Template clamping structures 7 are mounted on both ends of the bottom surface of the mounting plate 6. The template clamping structures 7 are used to clamp a porous template 11; the porous template 11 is an inert platinum metal plate with a flat structure having multiple through holes arranged in an array. The pore size and porosity of the porous template 11 can change the pore size and porosity of the aluminum porous structure generated on the surface of the porous template 11. The swap drive mechanism enables the porous templates 11 clamped on the two template clamping structures 7 to be immersed in the electrolysis chamber 4-2 and the electroforming chamber 4-3, respectively, and to swap their positions.

[0035] The swap drive mechanism includes a Y-axis displacement mechanism 8, a Z-axis displacement mechanism 9 and a rotation drive mechanism 10. The Z-axis displacement mechanism 9 is installed on the Y-axis displacement mechanism 8. The rotation drive mechanism 10 is installed on the Z-axis displacement mechanism 9. The middle part of the mounting plate 6 is installed on the rotation drive mechanism 10. The Y-axis displacement mechanism 8 is used to drive the mounting plate 6 to move horizontally so as to move the two template clamping structures 7 to the unloading position so as to remove the processed aluminum porous structure. The Z-axis displacement mechanism 9 is used to drive the mounting plate 6 to move up and down so as to immerse or remove the porous templates 11 clamped on the two template clamping structures 7 in the electrolyte. The rotation drive mechanism 10 is used to drive the middle part of the mounting plate 6 to rotate around the vertical axis so that the positions of the two template clamping structures 7 are exchanged. In this embodiment, the Y-axis displacement mechanism 8 adopts a synchronous belt transmission structure; the Z-axis displacement mechanism 9 adopts a slide cylinder. The rotation drive mechanism 10 adopts a rotary cylinder.

[0036] The DC power supply 5 has three electrode structures, namely a positive electrode interface, an intermediate interface, and a negative electrode interface. The potential of the intermediate interface is between the potentials of the positive electrode interface and the negative electrode interface and can be adjusted. The intermediate interface of the DC power supply 5 is connected to the partition 4-1. The positive electrode interface and the negative electrode interface of the DC power supply 5 are respectively connected to the two template clamping structures 7. The positions of the positive electrode interface and the negative electrode interface of the DC power supply 5 can be switched to facilitate the positive and negative switching of the two template clamping structures 7.

[0037] In some embodiments, the positive and negative interfaces of the DC power supply 5 are not directly connected to the two template clamping structures 7, but are connected or disconnected through contact structures with the porous templates 11 clamped on the two template clamping structures 7; when the two template clamping structures 7 are interchanged, the positive and negative interfaces corresponding to the two template clamping structures 7 are also interchanged.

[0038] like Figure 4 As shown, the processing method of the titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device includes the following steps: Step 1: Run the test.

[0039] A low-temperature molten salt of 1-butyl-3-methylimidazolium chloroaluminate (BMIC-AlCl3) was added to the electroforming chamber 4-3 used for dealloying as an electrolyte, with a molar ratio of 1-butyl-3-methylimidazolium chloride (BMIC) to AlCl3 of 1:2. A 20% sodium nitrate (NaNO3) electrolyte was added to the electrolysis chamber 4-2, at a temperature of 20°C, an electrolysis voltage of 15V, a processing gap of 0.5mm, and an electrolyte flow rate of 12m / s. A protective layer was applied to the inner walls of the electrolysis chamber 4-2 and electroforming chamber 4-3, excluding the partition 4-1, and the outer surface of the template clamping structure 7. This protective layer prevented corrosion of the notch walls during electrochemical experiments. Start the X-axis displacement mechanism 2, Y-axis displacement mechanism 8, Z-axis displacement mechanism 9 and rotation drive mechanism 10 respectively to observe whether each power component can operate normally; check whether the electrolyte is sufficient, whether the device is airtight, whether there is any leakage, whether the bolts are fixed, whether the fixture is damaged or loose, etc., to see whether it can meet the operation requirements of the device.

[0040] Step 2: Workpiece clamping.

[0041] A porous template 11 without an aluminum metal layer formed on its surface is used as an electroforming electrode, and an insulating layer 12 is covered on one side of the electroforming electrode; a porous template 11 or an aluminum sheet with an aluminum metal layer formed on one side is used as an electrolysis electrode; an insulating layer 12 is covered on the side of the electrolysis electrode where the aluminum metal layer is formed; the insulating layer 12 can be made of either an insulating material film or a sheet of insulating material.

[0042] In some embodiments, the porous template 11 having an aluminum metal layer formed on one side serving as the electrolytic electrode is generated by the electroforming electrode reaction in the previous reaction cycle; therefore, at the initial stage of processing, the porous template 11 is not covered with the aluminum metal layer, and is replaced by clamping a piece of aluminum sheet on the template clamping structure 7 to facilitate the smooth progress of the reaction.

[0043] The electroforming electrode and the electrolytic electrode are clamped on two template clamping structures 7 respectively; after covering the surface of the titanium-aluminum alloy workpiece except the processed surface with a protective film, the titanium-aluminum alloy workpiece is mounted on the workpiece mounting structure on the side of the partition 4-1 close to the electroforming chamber 4-3.

[0044] Step 3: Electrochemical treatment.

[0045] The electroforming electrode is immersed in the electrolyte in electroforming chamber 4-3, and the electrolysis electrode is immersed in the electrolyte in electrolysis chamber 4-2. The electroforming electrode is connected to the negative terminal of a DC power supply 5, and the electrolysis electrode is connected to the positive terminal of the DC power supply 5. The DC power supply 5 outputs a constant current; this constant current flows from the positive terminal of the DC power supply 5, passes through the electrolysis electrode, the electrolyte in electrolysis chamber 4-2, the separator 4-1, the titanium-aluminum alloy workpiece, the electrolyte in electroforming chamber 4-3, the electroforming electrode, and then flows back into the negative terminal of the DC power supply 5. To ensure that the electrolyte does not leak, the entire electrolysis process is carried out in a relatively closed environment.

[0046] During the reaction process, the electrons of the titanium-aluminum alloy workpiece on the partition 4-1 close to the electroforming chamber 4-3 flow toward the side of the partition 4-1 close to the electrolysis chamber 4-2; the side of the partition 4-1 close to the electrolysis chamber 4-2 combines with the metal ions in the electrolyte to form a metal coating; the aluminum atoms on the machined surface of the titanium-aluminum alloy workpiece installed on the partition 4-1 close to the electroforming chamber 4-3 are converted into aluminum ions and enter the electrolyte in the electroforming chamber 4-3. This process realizes the dealloying of the titanium-aluminum alloy workpiece.

[0047] At the same time, the electroforming electrode acts as the cathode in the reaction, and the reduction reaction occurs as follows: 4[Al2Cl7] - +3e - →Al+7[AlCl4] - The electrolytic electrode acts as the anode in the reaction, and the oxidation reaction occurs as follows: A1-3e - +7[AlCl4] - →4[Al2Cl7] - During the reaction, the current density ratio between the electroforming electrode and the electrolytic electrode is varied by adjusting the reaction duration and the potential of the intermediate interface of the DC power supply 5. This regulates the rate of electroforming and the formation of the aluminum alloy layer, thereby preventing excessive thickness of the aluminum metal layer formed on the electroforming electrode or excessive consumption of the aluminum alloy layer on the electrolytic electrode. The higher the potential of the DC power supply 5, the smaller the amount of aluminum alloy layer formed on the electroforming electrode and the greater the amount of aluminum alloy layer removed from the electroforming electrode.

[0048] In this embodiment, the anode current density is set to 100 A / m 2 .

[0049] During the above process, on the electroformed electrode, the aluminum metal layer grows along the surface of the electroformed electrode facing away from the insulating layer 12, and the through holes on the porous template 11 cause the aluminum metal layer to automatically form a pore structure; and the pore structure of the aluminum metal layer naturally forms a trumpet-shaped opening with a gradually expanding opening on the side facing away from the porous template 11.

[0050] On the electrolysis electrode, the side of the aluminum metal layer facing away is protected by the insulating layer 12 and will not be damaged by electrolysis; the pore structure of the aluminum metal layer is corroded by electrolysis, so that the pore structure of the aluminum metal layer naturally forms a trumpet-shaped opening with a gradually expanding opening on the side close to the porous template 11. At the same time, the aluminum element at the connection between the aluminum metal layer and the porous template 11 is gradually electrolyzed, and the connection between the aluminum metal layer and the porous template 11 is destroyed, making the aluminum metal layer easy to remove. In this process, the porous template 11 exhibits resistance to electrochemical corrosion due to its high electrode potential, thereby ensuring the structural integrity and stability of the porous template 11. On this basis, by precisely controlling the electrolysis conditions, only the electroformed metal portion located on the template pore wall is subjected to electrolytic corrosion and selectively removed.

[0051] After electrolysis is complete, the pore structure of the aluminum metal layer forms an hourglass shape, with a small center and large ends. If the thickness of the porous template 11 is set too large, the current density on the eroded surface of the aluminum metal layer will be too low to allow electrolysis. To avoid this, the thickness of the porous template 11 is set to 0.14 mm in this embodiment.

[0052] Step 4: Switch electrolysis chamber 4-2.

[0053] The Z-axis displacement mechanism 9 drives the two porous templates 11 to rise and separate from the electrolyte; at this time, the porous template 11 serving as the electroforming electrode is formed with an aluminum metal layer; the aluminum porous structure 13 to be produced is formed on the porous template 11 serving as the electrolytic electrode; and the aluminum porous structure 13 is peeled off.

[0054] The rotary drive mechanism 10 rotates the mounting plate 6 180°, swapping the positions of the two porous templates 11. The original electroformed electrode serves as the new electrolysis electrode. The original electrolysis electrode serves as the new electroformed electrode. The insulating layer 13 is re-covered on the two porous templates 11 to meet the insulating layer position requirements in step 2. Specifically, the insulating layer on the new electrolysis electrode is removed and covered with an insulating layer on the side where the aluminum metal layer is formed. The insulating layer 12 is then covered on one side of the new electroformed electrode. The original insulating layer can be reused or a new insulating layer can be used.

[0055] Step 5: Re-execute steps 3 and 4 to achieve cyclic processing; thereby completing the electroforming and electrolysis operations of the aluminum porous structure in the same device; and the electroforming and electrolysis operations on the two porous templates 11 are completed simultaneously using the same DC power supply 5-station, with high production efficiency and low cost.

[0056] After the predetermined reaction time has elapsed, the titanium-aluminum alloy workpiece on the partition 4-1 is completely dealloyed. At this point, a new titanium-aluminum alloy workpiece is replaced on the partition 4-1. The titanium-aluminum alloy workpiece removed from the partition 4-1 is then cut. Because the machined surface of the titanium-aluminum alloy workpiece has undergone dealloying, the portion to be cut becomes loose and easier to machine.

[0057] Based on the above process, this embodiment can simultaneously perform electroforming to produce an aluminum metal layer with a porous structure, electrolysis to form an hourglass-shaped structure in the pores of the aluminum metal layer, and dealloying of the machined surface of the titanium-aluminum alloy workpiece.

[0058] Step 5: After completing the electrochemical machining of all workpieces, clean and maintain the machine tools, fixtures, various devices and chips generated by the machining.

Claims

1. A titanium-aluminum alloy dealloying and aluminum porous structure collaborative processing device, comprising a workbench (3); characterized in that: It also includes a workpiece exchange mechanism, a collaborative processing tank body (4) and a DC power supply (5); the collaborative processing tank body (4) is installed on a workbench (3); a partition (4-1) is provided in the collaborative processing tank body (4); the partition (4-1) is made of conductive material and divides the inner cavity of the collaborative processing tank body (4) into an electrolytic cavity (4-2) and an electroforming cavity (4-3) that are independent of each other; The workpiece swap mechanism comprises a swap drive mechanism, a mounting plate (6) and two template clamping structures (7); the two template clamping structures (7) are installed on the mounting plate (6) at intervals; the swap drive mechanism is used to drive the two template clamping structures (7) to enter the electrolysis chamber (4-2) and the electroforming chamber (4-3) respectively, and can make the two template clamping structures (7) exchange positions; the DC power supply (5) has three electrode structures, namely a positive electrode interface, an intermediate interface and a negative electrode interface; the potential of the intermediate interface is between the potential of the positive electrode interface and the potential of the negative electrode interface; During operation, a titanium-aluminum alloy workpiece is installed on one side of the partition (4-1) close to the electroforming chamber (4-3); two template clamping structures (7) respectively clamp the porous template (11) and immerse them in the electrolyte of the electrolysis chamber (4-2) and the electroforming chamber (4-3) respectively; the porous template (11) immersed in the electrolysis chamber (4-2) is connected to the positive electrode interface of the direct current power supply (5); and the porous template (11) immersed in the electroforming chamber (4-3) is connected to the negative electrode interface of the direct current power supply (5).

2. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: It also includes a frame (1) and an X-axis displacement mechanism (2); the X-axis displacement mechanism (2) is mounted on the frame (1); and the workbench (3) is driven by the X-axis displacement mechanism (2) to slide.

3. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: The partition plate (4-1) is plug-fitted into a slot structure in the middle of the cooperatively processed tank body (4).

4. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: The porous template (11) is a flat plate structure having a plurality of through holes arranged in an array.

5. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: The swap drive mechanism comprises a Y-axis displacement mechanism (8), a Z-axis displacement mechanism (9) and a rotation drive mechanism (10); the Z-axis displacement mechanism (9) is mounted on the Y-axis displacement mechanism (8); the rotation drive mechanism (10) is mounted on the Z-axis displacement mechanism (9); and the middle portion of the mounting plate (6) is mounted on the rotation drive mechanism (10).

6. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: The electrolyte filled in the electroforming chamber (4-3) is 1-butyl-3-methylimidazolium chloroaluminate; and NaNO3 solution is added to the electrolyte filled in the electrolytic chamber (4-2).

7. The titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device according to claim 1, characterized in that: A workpiece mounting structure for clamping a titanium-aluminum alloy workpiece is provided on the partition (4-1) near the electroforming chamber (4-3).

8. A method for co-processing titanium aluminum alloy dealloying and aluminum porous structure, characterized in that: Using a titanium aluminum alloy dealloying and aluminum porous structure collaborative processing device as claimed in claim 1; the collaborative processing method comprises the following steps: Step 1: Using a porous template (11) without an aluminum metal layer formed on its surface as an electroforming electrode, and covering one side of the electroforming electrode with an insulating layer (12); using a porous template (11) with an aluminum metal layer formed on one side as an electrolysis electrode; covering the side of the electrolysis electrode with the aluminum metal layer formed with an insulating layer (12); mounting a titanium-aluminum alloy workpiece with its processed surface exposed on one side of a partition (4-1) close to an electroforming chamber (4-3); Step 2: immerse the electroforming electrode into the electrolyte of the electroforming chamber (4-3), and immerse the electrolysis electrode into the electrolyte of the electrolysis chamber (4-2); connect the electroforming electrode to the negative electrode interface of the DC power supply (5); connect the electrolysis electrode to the positive electrode interface of the DC power supply (5); start the DC power supply (5), and generate an electrochemical reaction; During the reaction process, the side of the partition (4-1) close to the electrolytic chamber (4-2) combines with the metal ions in the electrolyte to form a metal coating; the titanium-aluminum alloy workpiece installed on the partition (4-1) close to the electroforming chamber (4-3) is dealloyed on the processed surface, and the aluminum atoms are converted into aluminum ions and enter the electrolyte in the electroforming chamber (4-3); a reduction reaction occurs on the electroforming electrode, and an aluminum metal layer with a trumpet-shaped pore structure grows on the surface of the electroforming electrode away from the insulating layer (12); an oxidation reaction occurs on the electrolytic electrode, and the pore structure of the aluminum metal layer is electrolyzed, so that the aluminum metal layer forms an aluminum porous structure with a target shape.

9. The method for co-processing titanium aluminum alloy dealloying and aluminum porous structure according to claim 8, characterized in that: In the first reaction cycle of the process, an aluminum sheet is used instead of the porous template (11) having an aluminum metal layer formed on one side as an electrolytic electrode.

10. The method for co-processing titanium aluminum alloy dealloying and aluminum porous structure according to claim 8, characterized in that: In step 2, the amount of aluminum alloy layer generated on the electroforming electrode and the amount of aluminum alloy layer removed on the electroforming electrode are controlled by adjusting the reaction time and the potential of the intermediate interface of the DC power supply (5).

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