Machining device and machining process for titanium alloy 3D printing frame section combined structural part

Abstract

The invention provides a machining device for a titanium alloy 3D printing frame section combined structural part and a machining technology of the machining device, and relates to the technical field of metal 3D printing. The machining device for the titanium alloy 3D printing frame section combined structural part comprises an equipment body, a controller, an inert gas supply device, a temperature control device, a powder laying device, a printing device and two sets of base plates. Through the multi-station layout that the main box body and the at least one auxiliary box body cooperatively work and the automatic substrate transferring system, the printing process and the cooling and part taking process are carried out in parallel for the first time in the field, the equipment utilization rate and the production takt are remarkably increased, and the production efficiency is improved. Through the fine positioning system and the independent chamber atmosphere control system which are integrated on the main box body, the required high-purity inert gas environment can be maintained at each station while rapid and automatic exchange of substrates is realized, so that the efficiency is improved, and the stability of the printing process and the high precision and the high performance of a formed part are ensured at the same time.

Description

Technical Field

[0001] This invention relates to the field of metal 3D printing technology, specifically to a processing device and processing technology for titanium alloy 3D printed frame segment assembly structures. Background Technology

[0002] Metal 3D printing technology, especially additive manufacturing of high-performance metal materials such as titanium alloys, has become a key process for manufacturing complex structural parts in fields such as aerospace and precision instruments. Currently, this technology has moved from the stage of principle exploration to industrial application, and the vast majority of industrial-grade equipment on the market is a single-chamber design. In such equipment, a series of processes, including powder spreading, melting, cooling, part removal, and subsequent powder cleaning, must be completed sequentially within the same chamber. This results in the equipment needing to undergo a lengthy cooling period, manual part removal, and readjustment after printing, significantly limiting the actual utilization rate of the equipment and production cycle time.

[0003] This serial operating mode inherently suffers from efficiency bottlenecks. Because subsequent processes such as printing and cooling cannot be separated, the manufacturing cycle of a single part is forcibly extended, resulting in a low capacity ceiling for a single machine and making it difficult to meet the demands of large-scale production. Furthermore, frequent opening of the chamber for part removal and reloading not only disrupts the stable process environment and increases inert gas consumption but also introduces risks of powder contamination and operational errors. In addition, if parts cannot undergo timely and controlled programmed cooling after printing, the release of internal residual stress is difficult to precisely control, potentially adversely affecting the dimensional stability and mechanical properties of the final component. Therefore, the industry urgently needs to explore a completely new equipment architecture and working mode outside the existing single-chamber serial operation technology framework, in order to fundamentally break through the bottleneck of production efficiency and achieve high-quality, high-efficiency, and continuous metal 3D printing manufacturing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a processing device and process for titanium alloy 3D printed frame segment assembly structures, which solves the problems of long equipment downtime, long production cycles, and difficulty in achieving continuous production caused by the serial working mode in existing titanium alloy 3D printed frame segment assembly structure processing devices and processes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a processing device for 3D printing titanium alloy frame segment assembly structures, comprising a device body, a controller, an inert gas supply device, a temperature control device, a powder spreading device, a printing device, and two sets of substrates. The device body includes a base, a main housing is provided on the upper wall of the base, a set of buffer boxes are provided on both sides of the main housing, and a set of auxiliary housings are provided on the side of each of the two sets of buffer boxes away from the main housing. A first slide rail is provided on the lower inner wall of the main housing, and a second slide rail is provided on the lower inner wall of the auxiliary housing. The two sets of substrates are slidably mounted on the first or second slide rail by sliders. A liftable upper platform is provided above the main housing, and the powder spreading device and the printing device are both located on the lower wall of the upper platform. A side positioning system for precise positioning of the substrates is provided on the inner wall of the main housing. A drive hook system for driving the substrates to move between the main housing, the buffer boxes, and the auxiliary housings is provided on the outer side of the auxiliary housings.

[0006] The main housing, buffer housing, and auxiliary housing are each composed of an inner liner, an insulation layer, and a shell, arranged sequentially from the inside out. The front walls of the main housing and the two auxiliary housings are each equipped with a door frame, and a first sealing door is slidably connected to the inner side wall of each door frame. Two sets of first fixing plates are fixedly connected to the upper wall of the main housing. Two sets of first guide seats are fixedly connected to one side of each first fixing plate. A set of first guide posts is slidably connected to the inner side wall of each set of first guide seats. The lower ends of all four sets of first guide posts penetrate the upper wall of the main housing and extend into its interior. One end of each first guide post extending into the main housing is fixedly connected to the upper platform via a bracket. A second linear actuator is also fixedly connected to the side wall of the first fixing plate, located between the two sets of first guide seats. The protruding shaft end of the second linear actuator penetrates the top of the main housing and extends into its interior. An extension rod is fixedly connected to the protruding shaft end of the second linear actuator via a connecting sleeve. The end of the extension rod away from the connecting sleeve is fixedly connected to the upper wall of the bracket.

[0007] Preferably, the top of the buffer box is provided with a second fixing plate, and two sets of second guide seats are fixedly connected to one side of the second fixing plate. Each set of second guide seats has a set of second guide posts slidably connected to its inner sidewall. The lower end of the second guide post penetrates the top of the buffer box and extends into its interior. The end of the second guide post extending into the buffer box is fixedly connected to a second closed door with its opening facing downward. Two sets of partitions are fixedly connected to the inner sidewall of the buffer box in a left-right distribution. The second closed door is slidably connected between the two sets of partitions. A sealing layer is fixedly connected to the lower inner wall of the buffer box. When the second closed door descends to abut against the sealing layer, a sealed space is formed. A third linear actuator is also fixedly connected to one side of the second fixing plate and located between the two sets of second guide seats. The end of the third linear actuator's protruding shaft penetrates the top of the buffer box and is fixedly connected to the upper wall of the second closed door.

[0008] Preferably, a gap is provided between the first slide rail and the corresponding second slide rail for the second closed door to fall, and an arc transition section is provided at one end of the first slide rail and the corresponding second slide rail; a barrier is fixedly connected to the upper wall of the base plate.

[0009] Preferably, the side positioning system includes a heat-insulating box fixed to the lower inner wall of the main box via a second support base. The heat-insulating box consists of a box shell and an internal heat-insulating layer. A fixing seat is fixedly connected to the inner wall of the heat-insulating box. A push plate is slidably connected to the side of the fixing seat facing the base plate via two sets of third guide columns. A fourth linear actuator is fixedly connected to the side of the fixing seat away from the push plate. The end of the fourth linear actuator extends through the fixing seat and is fixedly connected to the push plate. A positioning pin is fixedly connected to the side of the push plate facing the base plate. The positioning pin passes through the outer wall of the heat-insulating box and is slidably connected to it. A positioning hole adapted to the positioning pin is provided on the side of the base plate facing the heat-insulating box.

[0010] Preferably, a first dust baffle is fixedly connected to both the inner front wall and the inner rear wall of the main housing, and a second dust baffle is fixedly connected to both the front wall and the rear wall of the base plate. The first dust baffle and the second dust baffle located on the same side partially overlap in a top view projection, and the horizontal height of the first dust baffle is lower than that of the second dust baffle.

[0011] Preferably, the drive hook system includes a first linear actuator fixed to the outside of the sub-box via a first support base. The end of the extended shaft of the first linear actuator is fixedly connected to a sleeve with a regular polygonal cross-section via a linkage plate. The end of the sleeve facing the sub-box penetrates its outer wall and extends into the interior. A servo motor is fixedly connected to the side of the linkage plate away from the sub-box. The end of the output shaft of the servo motor penetrates the linkage plate and the sleeve and extends into the interior of the sleeve. A rotating rod is fixedly connected to the end of the output shaft of the servo motor. The end of the rotating rod away from the servo motor penetrates the sleeve and extends into the interior of the sub-box. A hanging piece is fixedly connected to the outer wall of the section of the rotating rod extending into the interior of the sub-box. A U-shaped hook with its opening facing downwards is fixedly connected to the side of the base plate facing the sleeve.

[0012] Preferably, the rear walls of the main housing, the buffer housing, and the auxiliary housing are all provided with inert gas discharge pipes and inert gas inlet pipes, and valves are provided on the outer walls of the inert gas discharge pipes and inert gas inlet pipes. A pressure gauge is also provided on the outer wall of the inert gas inlet pipe.

[0013] Preferably, the outlet and inlet of the inert gas inlet pipe and the inert gas outlet pipe on the rear wall of the buffer box both point to the cavity inside the second closed door.

[0014] A processing technology for a titanium alloy 3D printed frame segment assembly structure is provided, based on the aforementioned processing device for a titanium alloy 3D printed frame segment assembly structure. The processing technology includes the following steps: S1: Initialization, the controller checks the atmosphere and sealing door status of each chamber, places one set of substrates into the main chamber and completes side positioning, and places another set into the auxiliary chamber; S2: Start processing. The upper platform inside the main box descends, and the printing device and powder spreading device work together to print titanium alloy frame structural parts on the substrate. S3: Transfer preparation. After printing is completed, the upper platform rises and the second closed door between the main box and the side buffer box is lifted. S4: Hook linkage, the first linear driver outside the auxiliary box pushes the sleeve and rotating rod to extend in, the servo motor drives the rotating rod to rotate 90°, so that the hanging piece rotates into the hook of the base plate; S5: Synchronous exchange, the first linear driver retracts, dragging the printed substrate in the main box back to the auxiliary box. At the same time, another first linear driver moves, pushing the cooled substrate in the other auxiliary box into the main box. S6: Precise positioning, the side positioning system inside the main housing is activated, and the fourth linear driver pushes the positioning pin to insert into the positioning hole of the new substrate; S7: Sealing and cooling. The second sealing door descends and seals, the main chamber begins the next round of printing, while the substrate moved to the auxiliary chamber undergoes programmed cooling in an inert atmosphere. S8: Cyclic operation, repeating steps S2 to S7 to achieve continuous and efficient printing of titanium alloy frame segment composite structures.

[0015] This invention provides a processing device and process for 3D printing titanium alloy frame segment assembly structures. It offers the following advantages: Compared with existing technologies, the processing device and processing technology of this titanium alloy 3D printed frame segment combination structure, by setting up a multi-station layout in which the main box and at least one auxiliary box work together, and equipped with an automatic substrate transfer system, has for the first time in this field achieved the parallel execution of the printing process and the cooling and part removal process. This fundamentally breaks the production efficiency bottleneck caused by the serial working mode of traditional single-chamber equipment, and significantly improves equipment utilization and production cycle.

[0016] Compared with existing technologies, the processing device and process of this titanium alloy 3D printed frame segment assembly structure, through the precision positioning system integrated into the main body and the independent chamber atmosphere control system, can achieve rapid and automatic substrate exchange while ensuring that the substrate can be precisely locked in the same coordinate system before each printing. In addition, each station can maintain the required high-purity inert gas environment, thereby improving efficiency while ensuring the stability of the titanium alloy frame segment structure printing process and the high precision and high performance of the formed parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 For the present invention Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a partial cross-sectional view of the linkage plate, servo motor, and sleeve connection structure of the present invention. Figure 5 This is a schematic diagram of the rear side of the overall structure of the present invention; Figure 6 For the present invention Figure 5 A magnified view of a section at point C; Figure 7 This is a partial sectional view of the internal structure of the main housing of the present invention. Figure 8 For the present invention Figure 7 A magnified view of a section at point D; Figure 9 For the present invention Figure 7 A magnified view of a section at point E in the middle; Figure 10 This is a partial sectional view of the internal structure of the heat insulation box of the present invention; Figure 11 This is a partial cross-sectional view of the internal structure of the buffer box of the present invention; Figure 12 This is a partial sectional view of the connecting structure of the rotating rod and the hanging plate of the present invention; Figure 13 This is a schematic diagram of a partial structure of the substrate and hook of the present invention.

[0018] The components include: 1. Main housing; 2. Buffer box; 3. Secondary housing; 4. Door frame; 5. First sealing door; 6. First support base; 7. First linear actuator; 8. First fixing plate; 9. First guide seat; 10. First guide post; 11. Second linear actuator; 12. Second fixing plate; 13. Second guide seat; 14. Second guide post; 15. Third linear actuator; 16. Inert gas exhaust pipe; 17. Inert gas inlet pipe; 18. Valve; 19. Pressure gauge; 20. Extension rod; 21. Bracket; 22. Upper platform; 23. Base plate; 24. Enclosure; 25. First slide rail; 26. 27. Slider; 28. Second support base; 29. ​​Insulation box; 20. Insulation layer; 21. Box shell; 22. First dust baffle; 33. Second dust baffle; 34. Positioning pin; 35. Positioning hole; 36. Fixed base; 37. Push plate; 38. Third guide column; 39. Fourth linear actuator; 40. Second slide rail; 41. Second closed door; 42. Sealing layer; 43. Arc transition section; 44. Base; 45. Shell; 46. Insulation layer; 47. Inner liner; 48. Linkage plate; 49. Sleeve; 50. Servo motor; 41. Rotating rod; 52. Hanging plate; 53. Hook; 54. Partition. Detailed Implementation

[0019] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: like Figures 1 to 13 As shown, this embodiment of the invention provides a processing device and processing technology for a titanium alloy 3D printed frame segment assembly structure.

[0021] Multi-station layout and parallel processing To achieve parallel processing of printing and cooling / unloading processes and overcome the production efficiency bottleneck of single-chamber equipment, this device includes a main body, a controller, an inert gas supply device, a temperature control device, a powder spreading device, a printing device, and two sets of substrates 23. The main body includes a base 41, with a main housing 1 mounted on the upper wall of the base 41. A set of buffer boxes 2 are located on each side of the main housing 1, and a set of auxiliary housings 3 are located on the side of each buffer box 2 furthest from the main housing 1. This structure divides the traditional single working chamber into a dedicated printing chamber and a cooling / unloading chamber. This allows the printing process to proceed continuously within the main housing 1 while the cooling and unloading processes are completed simultaneously within the auxiliary housings 3. This achieves spatial separation and temporal overlap in the production process, fundamentally reducing equipment downtime and significantly improving overall equipment utilization and production cycle time.

[0022] Substrate transfer and precise positioning To ensure reliable transfer of the substrate between different chambers and achieve extremely high positioning accuracy before printing, a first slide rail 25 is provided on the lower inner wall of the main housing 1, and a second slide rail 37 is provided on the lower inner wall of the auxiliary housing 3. The two sets of substrates 23 are slidably mounted on the first slide rail 25 or the second slide rail 37 via sliders 26. A side positioning system for precise positioning of the substrate 23 is provided on the inner wall of the main housing 1. When the substrate 23 is transferred to a preset station within the main housing 1, the side positioning system precisely eliminates positioning errors accumulated on the slide rails, ensuring a precise relative position between the substrate 23 and the printing device on the upper platform 22. This provides crucial assurance for printing high-precision titanium alloy frame structural components.

[0023] Dynamic platform integrated printing To achieve integrated and precise control of toner spreading and printing functions, a liftable upper platform 22 is provided above the main housing 1. The toner spreading device and the printing device are both located on the lower wall of the upper platform 22. Two sets of first fixing plates 8 are fixedly connected to the upper wall of the main housing 1. Two sets of first guide seats 9 are fixedly connected to one side of the first fixing plates 8. A set of first guide columns 10 is slidably connected to the inner side wall of each set of first guide seats 9. The lower ends of the four sets of first guide columns 10 penetrate through the upper wall of the main housing 1 and extend into its interior. One end of the first guide column 10 extending into the main housing 1 is fixedly connected to the upper platform 22 via a bracket 21. A second linear actuator 11 is also fixedly connected to the side wall of the first fixing plate 8 and located between the two sets of first guide seats 9. The end of the second linear actuator 11 extends through the top of the main housing 1 and into its interior. An extension rod 20 is fixedly connected to the end of the second linear actuator 11 through a connecting sleeve. The end of the extension rod 20 away from the connecting sleeve is fixedly connected to the upper wall of the bracket 21. With the above structure, the second linear driver 11 can drive the entire upper plate 22 to move vertically and precisely along the first guide post 10, thereby controlling the distance between the powder spreading device and the printing device and the substrate 23, and realizing stable and reliable layer-by-layer printing.

[0024] Chamber isolation and atmosphere buffering To address the challenges of cross-contamination and purity maintenance between multiple chambers, a second fixed plate 12 is installed on the top of the buffer box 2. Two sets of second guide seats 13 are fixedly connected to one side of the second fixed plate 12. A set of second guide posts 14 are slidably connected to the inner wall of each set of second guide seats 13. The lower end of the second guide post 14 penetrates the top of the buffer box 2 and extends into its interior. One end of the second guide post 14 extending into the buffer box 2 is fixedly connected to a U-shaped second sealing door 38 with its opening facing downwards. Two sets of partitions 51 are fixedly connected to the inner wall of the buffer box 2, arranged horizontally. The second sealing door 38 is slidably connected between the two sets of partitions 51. A sealing layer 39 is fixedly connected to the lower inner wall of the buffer box 2. When the second sealing door 38 descends to abut against the sealing layer 39, a sealed space is formed. A third linear actuator 15 is also fixedly connected to one side of the second fixed plate 12, located between the two sets of second guide seats 13. The end of the third linear actuator 15 extends through the top of the buffer box 2 and is fixedly connected to the upper wall of the second sealing door 38. When substrate 23 needs to be transferred, the third linear actuator 15 raises the second sealing door 38; when it is necessary to isolate the main housing 1 and the auxiliary housing 3, the second sealing door 38 descends and forms a seal with the sealing layer 39. This structure establishes an openable and closable physical isolation barrier between the main and auxiliary housings, effectively preventing cross-contamination of the unique atmospheric environments of each chamber (such as the high-purity atmosphere of the main housing and the air that may enter when the auxiliary housing is being removed) during substrate exchange.

[0025] Slide rail docking and powder constraint To ensure a smooth transition of the substrate between the slide rails in different chambers and prevent powder spillage, a gap is provided between the first slide rail 25 and the corresponding second slide rail 37 to allow the second sealing door 38 to fall. Both the first slide rail 25 and the corresponding second slide rail 37 have an arc-shaped transition section 40 at their opposite ends. A barrier 24 is fixedly connected to the upper wall of the substrate 23. Through this structure, the arc-shaped transition section 40 provides a smooth guide for the slider 26 of the substrate 23, allowing it to move from one slide rail section to another without impact. Simultaneously, the barrier 24 on the substrate 23 effectively confines the metal powder in the printing area, preventing it from spilling onto other parts of the equipment during substrate movement and maintaining a clean working environment.

[0026] High temperature resistant lateral precision positioning To achieve rigid and high-precision positioning of the substrate in a high-temperature environment, the side positioning system includes a heat-insulating box 28 fixed to the lower inner wall of the main housing 1 via a second support 27. The heat-insulating box 28 consists of a shell 2802 and an internal heat-insulating layer 2801. A fixing seat 33 is fixedly connected to the inner wall of the heat-insulating box 28. A push plate 34 is slidably connected to the side of the fixing seat 33 facing the substrate 23 via two sets of third guide posts 35. A fourth linear actuator 36 is fixedly connected to the side of the fixing seat 33 away from the push plate 34. The extended shaft end of the fourth linear actuator 36 passes through the fixing seat 33 and is fixedly connected to the push plate 34. A positioning pin 31 is fixedly connected to the side of the push plate 34 facing the substrate 23. The positioning pin 31 passes through the outer wall of the heat-insulating box 28 and is slidably connected thereto. A positioning hole 32 adapted to the positioning pin 31 is provided on the side of the substrate 23 facing the heat-insulating box 28. When the fourth linear actuator 36 pushes the push plate 34, the positioning pin 31 is precisely inserted into the positioning hole 32 of the substrate 23. Through the above structure, the heat insulation box 28 and its internal heat insulation layer 2801 effectively block the influence of the high temperature inside the main box 1 on the precision driving components such as the fourth linear actuator 36, ensuring the reliability and lifespan of the positioning system under long-term high-temperature operation, thereby ensuring the repeatability and positioning accuracy of the substrate position before each printing.

[0027] Dustproof and heat radiation shielding To prevent metal powder generated during printing from intruding into the precision positioning mechanism, a first dust baffle 29 is fixedly connected to the inner front wall and inner rear wall of the main housing 1, and a second dust baffle 30 is fixedly connected to the front wall and rear wall of the substrate 23. The first dust baffle 29 and the second dust baffle 30 on the same side partially overlap in a top view, and the horizontal height of the first dust baffle 29 is lower than that of the second dust baffle 30. Through the above structure, the first dust baffle 29 and the second dust baffle 30 together form a labyrinthine dust barrier. Regardless of whether the substrate 23 is moving or stationary, it can effectively prevent most of the suspended or splashed powder from entering the positioning pins 31, slide rails, and other critical areas below the substrate 23, reducing the risk of equipment malfunction due to powder contamination.

[0028] Mechanical hook transmission To ensure reliable force transmission and disengagement between the substrate and the drive mechanism under high-temperature conditions, the drive hook system includes a first linear actuator 7 fixed to the outside of the sub-box 3 via a first support base 6. The extended shaft end of the first linear actuator 7 is fixedly connected to a sleeve 46 with a regular polygonal cross-section via a linkage plate 45. The end of the sleeve 46 facing the sub-box 3 penetrates its outer wall and extends into its interior. A servo motor 47 is fixedly connected to the side of the linkage plate 45 away from the sub-box 3. The output shaft end of the servo motor 47 penetrates the linkage plate 45 and the sleeve 46 and extends into the sleeve 46. A rotating rod 48 is fixedly connected to the output shaft end of the servo motor 47. The end of the rotating rod 48 away from the servo motor 47 penetrates the sleeve 46 and extends into the sub-box 3. A hanging piece 49 is fixedly connected to the outer wall of the section of the rotating rod 48 extending into the sub-box 3. A U-shaped hook 50 with its opening facing downwards is fixedly connected to the side of the substrate 23 facing the sleeve 46. When connection is required, the first linear actuator 7 pushes the entire mechanism closer to the substrate 23, and then the servo motor 47 drives the rotating rod 48 to rotate 90 degrees, causing the hanging piece 49 to rotate into the U-shaped groove of the hook 50; when disengagement is required, the servo motor 47 simply reverses. This purely mechanical hooking method completely avoids the problem of electromagnets potentially failing at high temperatures, achieving stable and reliable connection and disengagement under harsh working conditions, and ensuring the success rate of substrate transmission.

[0029] Independently controllable atmosphere system To provide and maintain an independent and pure process atmosphere for each functional chamber, the rear walls of the main chamber 1, buffer chamber 2, and auxiliary chamber 3 are all equipped with inert gas exhaust pipes 16 and inert gas inlet pipes 17. Valves 18 are installed on the outer walls of both the inert gas exhaust pipe 16 and inert gas inlet pipe 17, and a pressure gauge 19 is also installed on the outer wall of the inert gas inlet pipe 17. The outlet and inlet of the inert gas inlet pipe 17 and inert gas exhaust pipe 16 on the rear wall of the buffer chamber 2 both point towards the cavity inside the second sealing door 38. With this structure, the controller can independently control the corresponding valve 18 according to the current task of each chamber (such as printing, cooling, and post-part removal purification) to perform operations such as vacuuming, gas filling, and pressure holding. In particular, the unique design of the buffer chamber 2, where airflow directly acts on the cavity formed by the second sealing door 38, efficiently purifies this transition area, ensuring that the required atmosphere purity is maintained before and after substrate exchange, acting as a reliable atmosphere lock.

[0030] The working principle of this invention is as follows: In the initial state, one set of substrates 23 is located in the main housing 1 and has been precisely positioned, while another set of substrates 23 is located in the auxiliary housing 3 on one side. The upper platform 22 in the main housing 1 descends under the drive of the second linear actuator 11, and the powder spreading device integrated on its lower wall and the printing device begin to work together to print titanium alloy frame structural parts layer by layer on the substrates 23.

[0031] Once the printing task in the main chamber 1 is completed, the upper platen 22 rises and resets. Next, the second sealing door 38 between the main chamber 1 and the target buffer chamber 2 is lifted by the third linear actuator 15, opening the transfer channel. Simultaneously, the drive hook system corresponding to the outer side of the auxiliary chamber 3 is activated: the first linear actuator 7 pushes the sleeve 46 and rotating rod 48 towards the substrate 23, and then the servo motor 47 drives the rotating rod 48 to rotate 90°, causing the hanging piece 49 to rotate into the hook 50 of the substrate 23, completing the mechanical connection.

[0032] Subsequently, the two sets of first linear actuators 7 operate synchronously. One set pulls the printed substrate 23 from the main housing 1 back to the auxiliary housing 3 via the buffer box 2 for programmed cooling, while the other set pushes the cooled substrate 23 from the other auxiliary housing 3 into the main housing 1. The substrate 23 smoothly transitions through the arc transition section 40 between the slide rails. After the substrate is in place, the second sealing door 38 immediately descends and seals, isolating the chamber. The side positioning system inside the main housing 1 then activates, and the fourth linear actuator 36 pushes the positioning pin 31 to precisely insert into the positioning hole 32 of the new substrate 23, completing the precise positioning.

[0033] Afterward, the main chamber 1 can immediately begin the next round of printing, while the substrate with parts transferred to the auxiliary chamber 3 undergoes controlled cooling under an independent temperature control system and inert atmosphere protection. The entire process is coordinated by the controller, enabling parallel operation of printing and cooling / removal of parts, repeating continuously, thereby achieving continuous, efficient, and high-precision manufacturing of titanium alloy frame segment composite structural components.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing device for a titanium alloy 3D printed frame segment assembly structure, characterized in that: The device includes a main body, a controller, an inert gas supply device, a temperature control device, a powder spreading device, a printing device, and two sets of substrates (23). The main body includes a base (41), and a main housing (1) is provided on the upper wall of the base (41). A set of buffer boxes (2) is provided on each side of the main housing (1), and a set of auxiliary housings (3) is provided on the side of each of the two sets of buffer boxes (2) away from the main housing (1). A first slide rail (25) is provided on the lower inner wall of the main housing (1), and a second slide rail (37) is provided on the lower inner wall of the auxiliary housings (3). The substrate (23) is slidably mounted on the first slide rail (25) or the second slide rail (37) via a slider (26); a liftable upper platform (22) is provided above the main housing (1), and the powder spreading device and the printing device are both located on the lower wall of the upper platform (22); a side positioning system for precisely positioning the substrate (23) is provided on the inner side wall of the main housing (1); a drive hook system for driving the substrate (23) to move between the main housing (1), the buffer box (2) and the secondary housing (3) is provided on the outer side of the secondary housing (3).

2. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 1, characterized in that: The main box (1), buffer box (2) and auxiliary box (3) are all composed of an inner liner (44), a heat insulation layer (43) and a shell (42) from the inside out; the front walls of the main box (1) and the two auxiliary boxes (3) are provided with door frames (4), and the inner side wall of the door frame (4) is slidably connected with a first closed door (5); the upper wall of the main box (1) is fixedly connected with two sets of first fixing plates (8), and one side of the first fixing plate (8) is fixedly connected with two sets of first guide seats (9). The inner side wall of each set of first guide seats (9) is slidably connected with a set of first guide posts (10), and the lower ends of the four sets of first guide posts (10) all penetrate the main box. The upper wall of the housing (1) extends into its interior. One end of the first guide post (10) extending into the interior of the main housing (1) is fixedly connected to the upper platform (22) via a bracket (21). The side wall of the first fixing plate (8) and located between the two sets of first guide seats (9) is also fixedly connected to a second linear driver (11). The end of the extended shaft of the second linear driver (11) passes through the top of the main housing (1) and extends into its interior. The end of the extended shaft of the second linear driver (11) is fixedly connected to an extension rod (20) via a connecting sleeve. The end of the extension rod (20) away from the connecting sleeve is fixedly connected to the upper wall of the bracket (21).

3. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 2, characterized in that: The top of the buffer box (2) is provided with a second fixing plate (12). Two sets of second guide seats (13) are fixedly connected to one side of the second fixing plate (12). A set of second guide posts (14) are slidably connected to the inner wall of each set of second guide seats (13). The lower end of the second guide post (14) penetrates the top of the buffer box (2) and extends into its interior. The end of the second guide post (14) that extends into the interior of the buffer box (2) is fixedly connected to a second closed door (38) with the opening facing downwards. Two sets of second guide posts (38) are fixedly connected to the inner wall of the buffer box (2) in a left-right distribution. The partition (51) and the second closed door (38) are slidably connected between the two sets of partitions (51); the inner lower wall of the buffer box (2) is fixedly connected to a sealing layer (39), and when the second closed door (38) descends to abut against the sealing layer (39), a sealed space is formed; a third linear actuator (15) is also fixedly connected to one side of the second fixed plate (12) and between the two sets of second guide seats (13), and the end of the third linear actuator (15) extends through the top of the buffer box (2) and is fixedly connected to the upper wall of the second closed door (38).

4. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 3, characterized in that: A gap is provided between the first slide rail (25) and the corresponding second slide rail (37) for the second closed door (38) to fall. The first slide rail (25) and the corresponding second slide rail (37) are provided with an arc transition section (40) at opposite ends. A barrier (24) is fixedly connected to the upper wall of the base plate (23).

5. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 4, characterized in that: The side positioning system includes an insulated box (28) fixed to the lower inner wall of the main body (1) by a second support (27). The insulated box (28) consists of a shell (2802) and an internal insulation layer (2801). A fixing seat (33) is fixedly connected to the inner wall of the insulated box (28). A push plate (34) is slidably connected to the side of the fixing seat (33) facing the base plate (23) by two sets of third guide columns (35). The fixing seat (33) is away from the push plate (34). A fourth linear actuator (36) is fixedly connected to one side of the substrate (23). The end of the extended shaft of the fourth linear actuator (36) passes through the fixed seat (33) and is fixedly connected to the push plate (34). A positioning pin (31) is fixedly connected to the side of the push plate (34) facing the substrate (23). The positioning pin (31) passes through the outer wall of the heat insulation box (28) and is slidably connected to it. A positioning hole (32) adapted to the positioning pin (31) is provided on the side of the substrate (23) facing the heat insulation box (28).

6. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 5, characterized in that: The main box (1) has a first dust baffle (29) fixedly connected to the inner front wall and the inner rear wall. The base plate (23) has a second dust baffle (30) fixedly connected to the front wall and the rear wall. The first dust baffle (29) and the second dust baffle (30) located on the same side partially overlap under the top view projection, and the horizontal height of the first dust baffle (29) is lower than that of the second dust baffle (30).

7. The processing apparatus for a titanium alloy 3D printed frame segment assembly structure according to claim 6, characterized in that: The drive hook system includes a first linear actuator (7) fixed to the outside of the sub-box (3) via a first support base (6). The extended shaft end of the first linear actuator (7) is fixedly connected to a sleeve (46) with a regular polygonal cross-section via a linkage plate (45). The end of the sleeve (46) facing the sub-box (3) penetrates its outer wall and extends into the interior. A servo motor (47) is fixedly connected to the side of the linkage plate (45) away from the sub-box (3). The output shaft end of the servo motor (47) penetrates through... The linkage plate (45) and the sleeve (46) extend into the sleeve (46). The output shaft of the servo motor (47) is fixedly connected to a rotating rod (48). The end of the rotating rod (48) away from the servo motor (47) passes through the sleeve (46) and extends into the sub-box (3). A hanging piece (49) is fixedly connected to the outer wall of the section of the rotating rod (48) that extends into the sub-box (3). A U-shaped hook (50) with the opening facing down is fixedly connected to the side of the base plate (23) facing the sleeve (46).

8. The processing apparatus for a titanium alloy 3D printed frame segment assembly structure according to claim 7, characterized in that: The rear walls of the main housing (1), buffer housing (2) and auxiliary housing (3) are all provided with inert gas discharge pipe (16) and inert gas inlet pipe (17). The outer walls of the inert gas discharge pipe (16) and inert gas inlet pipe (17) are all provided with valves (18). The outer wall of the inert gas inlet pipe (17) is also provided with a pressure gauge (19).

9. The processing device for a titanium alloy 3D printed frame segment assembly structure according to claim 8, characterized in that: The outlet and inlet of the inert gas inlet pipe (17) and the inert gas outlet pipe (16) on the rear wall of the buffer box (2) both point to the cavity inside the second closed door (38).

10. A processing technology for a titanium alloy 3D printed frame segment assembly structure, wherein the processing is performed based on the processing device for a titanium alloy 3D printed frame segment assembly structure as described in claim 9, characterized in that, The processing technology includes the following steps: S1: Initialization, the controller checks the atmosphere and sealing door status of each chamber, places one set of substrates (23) in the main housing (1) and completes side positioning, and places another set in the auxiliary housing (3); S2: Start processing, the upper platform (22) inside the main box (1) descends, the printing device and the powder spreading device work together to print titanium alloy frame structure parts on the substrate (23); S3: Substrate transfer preparation. After printing is completed, the upper plate (22) rises and the second closed door (38) between the main box (1) and the side buffer box (2) is raised. S4: Hook linkage, the first linear driver (7) outside the sub-box (3) pushes the sleeve (46) and the rotating rod (48) to extend in, the servo motor (47) drives the rotating rod (48) to rotate 90°, so that the hanging piece (49) rotates into the hook (50) of the base plate (23); S5: Synchronous exchange, the first linear driver (7) retracts and drags the printed substrate (23) in the main box (1) back to the auxiliary box (3). At the same time, another first linear driver (7) moves and pushes the cooled substrate (23) in the other auxiliary box (3) into the main box (1). S6: Precise positioning, the side positioning system inside the main housing (1) is activated, and the fourth linear driver (36) pushes the positioning pin (31) into the positioning hole (32) of the new substrate (23); S7: Sealing and cooling, the second sealing door (38) descends and seals, the main box (1) begins the next round of printing, while the substrate (23) moved to the auxiliary box (3) undergoes programmed cooling in an inert atmosphere; S8: Cyclic operation, repeating steps S2 to S7 to achieve continuous and efficient printing of titanium alloy frame segment composite structures.

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