A pulsating superplastic forming production line

Abstract

The application discloses a pulsating superplastic forming production line, and belongs to the technical field of superplastic forming, which comprises a pressurizing system, a taking system and a conveying system, the conveying system comprises a conveying vehicle for conveying a superplastic heating device, the pressurizing system comprises a pressurizing station for applying a mold closing pressure to the superplastic heating device, the taking system comprises a taking station for adding a blank or taking out a finished product into or from the superplastic heating device, the conveying vehicle circulates between the pressurizing station and the taking station through a circulating conveying line, and three conveying vehicles are located at the pressurizing station, the taking station and the circulating conveying line at the same time during production. The original three-process sequence of superplastic forming is changed into simultaneous three processes, compared with traditional superplastic forming equipment, the production efficiency is greatly improved, the degree of automation is higher, and each module is more specific and accurate in function.

Description

Technical Field

[0001] This invention relates to the field of superplastic forming technology, and in particular to a pulsed superplastic forming production line. Background Technology

[0002] Superplastic forming (SPF) and superplastic forming / diffusion bonding (SPF / DB) technologies are low-cost, high-efficiency, and near-net-shape component manufacturing technologies. The manufactured structural components are lightweight and have excellent structural integrity, leading to their increasing application in the aerospace field. A superplastic forming production line mainly consists of three processes: part removal, conveying, and thermoforming. The billet is transported to the superplastic forming unit by a transport system for high-speed forming, and then the finished product is removed by the conveying system and transported to a collection point. There is a clear sequential order among these three processes, resulting in low production efficiency. Furthermore, because the superplastic forming unit and the pressurizing unit are integrated, heating is performed first by the superplastic forming unit, followed by pressurization by the pressurizing unit. This sequential order between the heating and pressurizing processes in the thermoforming step further reduces the production time to a day or even longer for a single product. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems and provide a pulsed superplastic forming production line, which changes the original three-step superplastic forming process to a process in which the three steps are performed simultaneously. Compared with traditional superplastic forming equipment, this greatly improves production efficiency, has a higher degree of automation, and each module has a more specialized and precise function.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a pulsed superplastic forming production line, including a pressurizing system, a part-removing system, and a transport system. The transport system includes a transport vehicle for transporting the superplastic heating device. The pressurizing system includes a pressurizing station for applying mold-closing pressure to the superplastic heating device. The part-removing system includes a part-removing station for adding blanks into the superplastic heating device or removing finished products. The transport vehicle circulates between the pressurizing station and the part-removing station via a circulating conveyor line. There are at least three transport vehicles, and at any given time during production, three transport vehicles are located at the pressurizing station, the part-removing station, and the circulating conveyor line, respectively.

[0005] Preferably, the circulating conveyor line includes a ring conveyor line, a connecting conveyor line, and a pressurizing conveyor line. The connecting conveyor line divides the inner ring of the ring conveyor line into a forming area and a filling area. The pressurizing conveyor line is located within the forming area and connects the ring conveyor line and the connecting conveyor line. The pressurizing station is located on the conveying path of the pressurizing conveyor line. The part-retrieving station includes a blank spare rack located in the filling area and a part-retrieving device for retrieving blanks and placing finished products on the blank spare rack.

[0006] Preferably, the annular conveyor line is rectangular, and each of the four corners of the annular conveyor line is provided with a track turning platform, and a docking conveyor line is provided on the track turning platform.

[0007] Preferably, the annular conveyor line, the connecting conveyor line, the pressurizing conveyor line, and the docking conveyor line all use rectangular guide rails. The bottom of the transport vehicle is provided with a positioning groove and a rectangular track groove that is slidably connected to the rectangular guide rail. The pressurizing station includes a hydraulic press for pressing down the pressurizing mold and a lifting platform for lifting the transport vehicle. The lifting platform is provided with a positioning key that is inserted into the positioning groove. A pit is provided below the hydraulic press, and the lifting platform is set in the pit.

[0008] Preferably, the pressurization station includes a hydraulic control device located within the molding area.

[0009] Preferably, the superplastic heating device is an electric heating furnace, which includes an upper furnace body and a lower furnace body with a heating chamber. The opening of the heating chamber faces upward for sealing by the upper furnace body. The lower furnace body is provided with a guide column, and the upper furnace body is slidably connected to the guide column. A lower mold is provided inside the heating chamber. An upper mold for closing with the lower mold is provided on the upper furnace body. A lifting ring is provided on the upper furnace body. A side door and an air inlet communicating with the heating chamber are provided on the lower furnace body.

[0010] Preferably, the electric heating furnace is provided with an auxiliary hydraulic device for applying pressure to the upper furnace body and the lower furnace body in opposite directions, and the upper furnace body is provided with a pressure sensor for feeding back the pressure applied by the hydraulic press.

[0011] Preferably, the part-retrieving device includes a part-retrieving robotic arm assembly for retrieving finished products and a filling robotic arm assembly for filling blanks, wherein both the part-retrieving robotic arm assembly and the filling robotic arm assembly include a lifting robotic arm and a gripping robotic arm.

[0012] Preferably, the pressurization system includes an air source station and a water and electricity station located before and after the hydraulic press along the conveying direction on the pressurization conveying line. The water and electricity station includes a water and electricity pile and a connecting robotic arm. The water and electricity pile is provided with an electric female connector, a cooling water supply port and a cooling water return port. The lower furnace body is provided with an electric heating mechanism and a cooling pipeline. The electric heating mechanism is provided with an electric male connector. The cooling pipeline has a cooling water inlet and a cooling water outlet. The connecting robotic arm is used to connect the electric male connector to the electric female connector, the cooling water inlet and the cooling water supply port, and the cooling water outlet and the cooling water return port. The air source station includes an air source device and a connecting robotic arm. The air source device is provided with an air supply connector. The connecting robotic arm is used to insert the air supply connector into the air inlet.

[0013] Preferably, it includes a control cabinet for controlling the pressurization system, the part retrieval system, and the transportation system, the control cabinet being located within the filling area.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] In the pulsed superplastic forming production line of this invention, the traditional superplastic forming production line, which transports blanks to the superplastic heating device and removes finished products via a transport system, is replaced by placing the superplastic heating device on a transport vehicle. The superplastic heating device moves with the transport vehicle, actively discharging, receiving, and being pressurized. Through the cooperation of multiple transport vehicles and a circulating conveyor line, the superplastic heating device is simultaneously handling parts, conveying, and pressing during the production process. This allows the parts handling, conveying, and superplastic heating forming processes to be carried out synchronously, changing the traditional three-step process of superplastic forming production lines to a simultaneous process. This greatly improves production efficiency, and also increases the degree of automation, with each module having a more specialized and precise function. While the hydraulic press applies pressure, the superplastic heating device can also heat, allowing the heating and pressurizing steps in the superplastic heating forming process to be carried out simultaneously, further improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0017] Figure 1 This is a 3D structural diagram of a pulsed superplastic forming production line.

[0018] Figure 2A top view of a pulsed superplastic forming production line;

[0019] Figure 3 Left view of a pulsed superplastic forming production line;

[0020] Figure 4 A three-dimensional structural diagram of the transport vehicle and the superplastic heating device;

[0021] Figure 5 This is a cross-sectional view of the superplastic heating device;

[0022] Figure 6 This is a diagram showing the positional relationship between the lifting platform and the hydraulic press.

[0023] Explanation of reference numerals in the attached drawings: 1. Circular conveyor line; 2. Connecting conveyor line; 3. Pressurized conveyor line; 4. Transport vehicle; 5. Hydraulic press; 6. Hydraulic control device; 7. Billet spare rack; 8. Water and electricity pile; 9. Control cabinet; 10. Lifting robotic arm; 11. Grabbing robotic arm; 12. Track turning platform; 13. Docking conveyor line; 14. Superplastic heating device; 15. Gas source equipment; 16. Upper furnace body; 17. Lower furnace body; 18. Heating chamber; 19. Guide column; 20. Lifting ring; 21. Side opening door; 22. Double-headed hydraulic rod; 23. T-slot; 24. Track groove; 25. Pressure sensor; 26. Upper mold; 27. Lower mold; 28. Ground; 29. ​​Pit; 30. Lifting platform; 31. X-axis positioning lock; 32. Y-axis positioning key. Detailed Implementation

[0024] 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.

[0025] This embodiment provides a pulsed superplastic forming production line, such as Figures 1 to 6As shown, the system includes a pressurizing system, a part-retrieving system, and a transport system. The transport system includes a circulating conveyor line and at least three transport vehicles 4. Each transport vehicle 4 is equipped with a superplastic heating device 14. The pressurizing system includes a pressurizing station for applying pressure to the superplastic heating device 14 to close the mold. The part-retrieving system includes a part-retrieving station for adding blanks into the superplastic heating device 14. The transport vehicles 4 travel back and forth between the pressurizing station and the part-retrieving station along the circulating conveyor line. During the production process, at any given time, three transport vehicles 4 are located at the pressurizing station, the part-retrieving station, and the circulating conveyor line, respectively. The superplastic heating device 14 located at the pressurizing station is performing the heat-forming process, the superplastic heating device 14 located at the part-retrieving station is performing the loading process, and the superplastic heating device 14 located on the circulating conveyor line is transporting the superplastic heating device 14. This means that during superplastic forming production, the blank is simultaneously undergoing the heat-forming process, the loading process, and the transport process, with no sequential order between the three processes, thereby improving production efficiency. Furthermore, during the process of applying mold closing pressure to the superplastic heating device 14 at the pressurizing station, the superplastic heating device 14 is also simultaneously heating the blank. This means that the heating and pressurizing processes in the heat forming process are not sequential, thereby improving product forming efficiency. Preferably, at least three transport vehicles 4 are typically provided. However, to achieve continuous transport between the pressurizing station and the part removal station, four transport vehicles 4 can be used. When there is one transport vehicle 4 at each of the pressurizing and part removal stations, one transport vehicle 4 transports from the part removal station to the pressurizing station to deliver the internal superplastic heating device 14 containing the blank to the pressurizing station. Another transport vehicle 4 transports from the pressurizing station to the part removal station to remove the finished product from the superplastic heating device 14, ensuring the continuity of blank loading, blank forming, and finished product removal.

[0026] Transportation principles:

[0027] When one transport vehicle 4 is located at the pressurization station, and another transport vehicle 4 is located at the pick-up station, at least one transport vehicle 4 can transport from the pick-up station to the pressurization station. At the same time, the transport direction from the pressurization station to the pick-up station can be transported by transport vehicle 4 or at least one transport vehicle 4 can transport again.

[0028] In this embodiment, as Figures 1 to 6As shown, the circulating conveyor line includes a ring conveyor line 1, a connecting conveyor line 2, and a pressurizing conveyor line 3. The connecting conveyor line 2 divides the inner ring of the ring conveyor line 1 into a forming area and a filling area. The pressurizing conveyor line 3 is located within the forming area and connects the ring conveyor line 1 and the connecting conveyor line 2. The pressurizing station is located on the conveying path of the pressurizing conveyor line 3. The part-retrieving station includes a blank spare rack 7 and a part-retrieving device. The blank spare rack 7 is located within the filling area. The part-retrieving device is used to retrieve blanks from the blank spare rack 7 and fill them onto the superplastic heating device 14 of the transport vehicle 4, and to place finished products from the superplastic heating device 14 of the transport vehicle 4 onto the blank spare rack 7. The part-retrieving device may or may not be located within the filling area. A track turning platform 12 is provided at the connection point of the ring conveyor line 1, the connecting conveyor line 2, and the pressurizing conveyor line 3. The track turning platform 12 is equipped with a docking conveyor line 13 for docking with other conveyor lines. When the transport vehicle 4 moves from one conveyor line to the docking conveyor line 13 on the track turntable 12, the rotation of the track turntable 12 can connect the docking conveyor line 13 to another conveyor line, allowing the transport vehicle 4 to move to the other conveyor line.

[0029] For example, at the junction of pressurizing conveyor line 3 and connecting conveyor line 2, the docking conveyor line 13 on the track turntable 12 first docks with the pressurizing conveyor line 3. The transport vehicle 4 carrying the finished product first moves from the pressurizing conveyor line 3 to the docking conveyor line 13 on the track turntable 12. Then, the track turntable 12 rotates, and the docking conveyor line 13 docks with the connecting conveyor line 2, allowing the transport vehicle 4 to move onto the connecting conveyor line 2. Then, it moves from the connecting conveyor line 2 and the track turntable 12 to the circular conveyor line 1, moving towards the part picking station. The transport vehicle 4, after being filled with the blank, moves to the pressurizing conveyor line 3 via the circular conveyor line 1 and the track turntable 12.

[0030] Generally, the circular conveyor line 1 can be either circular or rectangular. However, a problem with a rectangular ring is that the transport vehicle 4 cannot easily turn directly at the four corners. Therefore, in this embodiment, as... Figures 1 to 6 As shown, when the circular conveyor line 1 is a rectangular ring, a track turning platform 12 is also provided at the four corners of the circular conveyor line 1. The track turning platform 12 is provided with a docking conveyor line 13, which is used for the transport vehicle 4 to switch between the horizontal and vertical segments of the circular conveyor line 1.

[0031] In this embodiment, as Figures 1 to 6As shown, the circular conveyor line 1, connecting conveyor line 2, pressurizing conveyor line 3, and docking conveyor line 13 all use rectangular guide rails. The bottom of the transport vehicle 4 is equipped with a positioning groove and a rectangular track groove 24. The rectangular track groove 24 is slidably connected to the rectangular guide rail. This arrangement allows the rectangular track groove 24 to detach from the rectangular guide rail during subsequent molding, thus allowing the transport vehicle 4 to detach from the pressurizing conveyor line 3. The pressurizing station includes a hydraulic press 5 and a lifting platform 30. The hydraulic frame of the hydraulic press 5 spans the pressurizing conveyor line 3 and is mounted on the ground 28. The pressure head of the hydraulic press 5 is vertically positioned and can press down on the superplastic heating device 14 to provide mold closing pressure. A pit 29 is located below the hydraulic press 5, and the lifting platform 30 is positioned in the pit 29. Initially, the lifting platform 30 is lower than the ground 28. When the transport vehicle 4 moves onto the lifting platform 30, the lifting platform 30 can lift the transport vehicle 4 upwards, thereby providing mold closing pressure to the superplastic heating device 14. The lifting platform 30 and the hydraulic press 5 work together to achieve effective pressurization. To prevent the transport vehicle 4 from deviating during pressurization, the lifting platform 30 is equipped with a positioning key. When the lifting platform 30 contacts the transport vehicle 4, the positioning key is inserted into the positioning groove, thus positioning the transport vehicle 4 and preventing deviation during pressurization. Preferably, the positioning groove includes an X-axis positioning groove and a Y-axis positioning groove, and the positioning key includes an X-axis positioning lock 31 and a Y-axis positioning key 32, achieving bidirectional positioning of the transport vehicle 4 and the lifting platform 30.

[0032] In this embodiment, as Figures 1 to 6 As shown, the pressurization station includes a hydraulic control device 6, which is located in the molding area and provides hydraulic oil to the hydraulic press 5 and controls the pressure.

[0033] Furthermore, in this embodiment, as Figures 1 to 6 As shown, if the lifting platform 30 is a hydraulic lifting platform, the hydraulic control device 6 simultaneously provides hydraulic oil to the hydraulic lifting platform and controls the pressure.

[0034] In this embodiment, as Figures 1 to 6As shown, the superplastic heating device 14 uses an electric heating furnace. The electric furnace includes an upper furnace body 16 and a lower furnace body 17. A heating chamber 18 is located at the center of the lower furnace body 17, with the opening of the heating chamber 18 facing upwards. An air inlet connected to the heating chamber 18 is provided on the lower furnace body 17, through which inert gas can be injected into the heating chamber 18 to protect the blank during the heating and forming process and reduce oxidation of the part surface. A vertically arranged guide column 19 is provided on the lower furnace body 17, and the upper furnace body 16 is slidably connected to the guide column 19, so that it can slide up and down along the guide column 19. A lower mold 27 is provided inside the heating chamber 18, and an upper mold 26 is provided on the upper furnace body 16. The upper mold 26 is used to close the mold with the lower mold 27. A lifting ring 20 is provided on the upper furnace body 16 to facilitate lifting the upper furnace body 16. After the upper furnace body 16 is lowered, it can seal the opening of the heating chamber 18. The lower furnace body 17 is equipped with a side-opening door 21. Opening the side-opening door 21 allows the billet to be placed into the lower mold 27 inside the heating chamber 18. The pressure head of the hydraulic press 5 applies downward pressure to the upper furnace body 16, and the lifting platform 30 lifts the transport vehicle 4 upward, thus applying upward pressure to the lower furnace body 17. Subsequently, the upper mold 26 and the lower mold 27 apply deformation pressure to the billet. Combined with the high-temperature heating of the heating chamber 18, superplastic forming of the billet can be achieved. Preferably, there are two guide columns 19, which are respectively set on two opposite sides of the lower furnace body 17. Of course, the above is only a preferred method and does not mean that only two guide columns 19 can be set. Three or four or more can also be set and arranged in a regular polygon.

[0035] In this embodiment, as Figures 1 to 6 As shown, the electric heating furnace is equipped with an auxiliary hydraulic device, which is used to apply pressure to the upper furnace body 16 and the lower furnace body 17 in opposite directions. The auxiliary hydraulic device, the hydraulic press 5, and the lifting platform 30 are pressure-coordinated and controlled to jointly pressurize the upper furnace body 16 and the lower furnace body 17. A pressure sensor 25 is installed on the upper surface of the upper furnace body 16 to provide feedback on the pressure applied by the hydraulic press 5. Preferably, the auxiliary hydraulic device can employ a double-headed hydraulic rod 22, with corresponding T-slots 23 on the upper furnace body 16 and the lower furnace body 17. One T-head of the double-headed hydraulic rod 22 slides within the T-slot 23 of the upper furnace body 16, and the other T-head slides within the T-slot 23 of the lower furnace body 17. When the two T-heads of the double-headed hydraulic rod 22 retract, they can simultaneously pull the upper furnace body 16 and the lower furnace body 17, applying pressure to both. To ensure balanced pressure, two T-slots 23 can be provided on the two opposite sides of the upper furnace body 16, and two T-slots 23 can be provided on the two opposite sides of the lower furnace body 17, resulting in a total of four T-slots 23 and four double-headed hydraulic rods 22. Of course, the above is only a preferred embodiment; the number and arrangement of the T-slots 23 and the number and arrangement of the double-headed hydraulic rods 22 can be adjusted accordingly.

[0036] In this embodiment, as Figures 1 to 6As shown, the part-retrieving device includes a part-retrieving robotic arm assembly and a filling robotic arm assembly. The part-retrieving robotic arm assembly is used to retrieve finished products. The filling robotic arm assembly is used to fill in billets. Therefore, the part-retrieving robotic arm assembly is located on the section of the circular conveyor line 1 that moves from the pressurizing station to the filling station. The filling robotic arm assembly is located on the section of the circular conveyor line 1 that moves from the filling station to the pressurizing station. Both the part-retrieving and filling robotic arm assemblies include a lifting robotic arm 10 and a gripping robotic arm 11. The lifting robotic arm 10 is located on the outside of the circular conveyor line 1, and the gripping robotic arm 11 is located on the inside of the circular conveyor line 1. The lifting robotic arm 10 is used to lift the upper furnace body 16, and the gripping robotic arm 11 is used to grip the billets or finished products. For example, in the loading robotic arm assembly, after the side door 21 is opened, the lifting robotic arm 10 raises the upper furnace body 16 via the lifting ring 20, creating a gap between the upper mold 26 and the lower mold 27. The gripping robotic arm 11 then removes the billet from the billet spare rack 7 and places it into the lower mold 27 through this gap. The side door 21 is then closed, and the lifting robotic arm 10 lowers the upper furnace body 16, with the upper mold 26 pressing down on the lower mold 27. Similarly, in the loading robotic arm assembly, the gripping robotic arm 11 first opens the side door 21, then removes the billet from the billet spare rack 7 and places it into the lower mold 27 before closing the side door 21. The part-removing robotic arm assembly's gripping robotic arm 11 is responsible for removing the finished product; the entire process can be referenced from the loading robotic arm assembly.

[0037] In this embodiment, as Figures 1 to 6 As shown, the pressurization system includes a gas source station and two water and electricity stations. The two water and electricity stations are located along the pressurization conveyor line 3, in the conveying direction, before and after the hydraulic press 5. Each water and electricity station includes a water and electricity pile 8 and a connecting robotic arm (not shown). The water and electricity pile 8 is equipped with an electrical female connector, a cooling water supply port, and a cooling water return port. The lower furnace body 17 is equipped with an electric heating mechanism and cooling pipes. The electric heating mechanism has an electrical male connector, and the cooling pipes have a cooling water inlet and a cooling water outlet. The connecting robotic arm is located beside the water and electricity pile 8 and is used to connect the electrical male connector to the electrical female connector, the cooling water inlet to the cooling water supply port, and the cooling water outlet to the cooling water return port. The gas source station includes a gas source device 15 and a connecting robotic arm (not shown). The gas source device 15 is equipped with a gas supply connector, and the connecting robotic arm is used to insert the gas supply connector into the gas inlet to provide inert gas to the heating chamber 18. The specific gas source device 15 includes an inert gas cylinder and a gas supply device. The gas supply connector is located on the gas supply device, and the gas supply device is connected to the inert gas cylinder. A quick-plug method is used for wiring to prevent wiring from becoming tangled due to the free movement of the superplastic heating unit.

[0038] In this embodiment, as Figures 1 to 6 As shown, it also includes a control cabinet 9, which is used to control the pressurization system, the part retrieval system and the transportation system. The control cabinet 9 is located in the filling area.

[0039] In this embodiment, asFigures 1 to 6 As shown, transport vehicle 4 can be a mobile shuttle.

[0040] In this embodiment, as ​ As shown, the working process is as follows:

[0041] Step 1: Select the shaped metal sheet blank according to the sheet metal processing requirements;

[0042] Step 2: Install the metal sheet blank into the superplastic heating device 14 using the part-removing device;

[0043] Step 3: The transport vehicle 4 moves to the vicinity of the water and electricity pile 8 in front of the hydraulic press 5, and connects the robotic arm to connect the superplastic heating device 14 to the power line and cooling water;

[0044] Step 4: Turn on the superplastic heating device 14 to heat the material. When the billet in the superplastic heating device 14 reaches the superplastic forming temperature of the metal sheet billet, the transport vehicle 4 moves the superplastic heating device 14 to the hydraulic press 5.

[0045] Step 5: Connect the robotic arm to the air source device 15 and the superplastic heating device 14, start the lifting platform 30 and the hydraulic press 5, and work together with the auxiliary hydraulic device to apply pressure and enter the forming stage;

[0046] Step 6: Once the forming pressure is stable as indicated by the air source device 15, the forming stage is complete. The hydraulic press 5 reduces pressure, and the lifting platform 30 lowers.

[0047] Step 7: The transport vehicle 4 moves to the vicinity of the water and electricity pile 8 behind the hydraulic press 5, connects to the water and electricity pile 8, and maintains pressure through the auxiliary hydraulic device;

[0048] Step 8: After the pressure holding is completed, cool down. After the billet temperature drops to room temperature, disconnect the power and water supply of the external water and electricity pile 8.

[0049] Step 9: The transport vehicle 4 moves to the blank preparation rack 7, removes the formed parts, cleans the mold, and then enters the next work cycle.

[0050] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A pulsed superplastic forming production line, characterized in that, The system includes a pressurizing system, a part-removing system, and a transport system. The transport system includes a transport vehicle for transporting the superplastic heating device. The pressurizing system includes a pressurizing station for applying mold-closing pressure to the superplastic heating device. The part-removing system includes a part-removing station for adding blanks into the superplastic heating device or removing finished products. The transport vehicle circulates between the pressurizing station and the part-removing station via a circulating conveyor line. There are three transport vehicles, and at any given time during production, three transport vehicles are located at the pressurizing station, the part-removing station, and the circulating conveyor line, respectively. The circulating conveyor line includes a ring conveyor line, a connecting conveyor line, and a pressurizing conveyor line. The connecting conveyor line divides the inner ring of the ring conveyor line into a forming area and a filling area. The pressurizing conveyor line is located within the forming area and connects the ring conveyor line and the connecting conveyor line. The pressurizing station is located on the conveying path of the pressurizing conveyor line. The part-retrieving station includes a blank spare rack located in the filling area and a part-retrieving device for retrieving blanks and placing finished products on the blank spare rack. The circular conveyor line is rectangular and has a track turning platform at each of its four corners, with a docking conveyor line on each track turning platform. The circular conveyor line, the connecting conveyor line, the pressurizing conveyor line, and the docking conveyor line all use rectangular guide rails. The bottom of the transport vehicle is provided with a positioning groove and a rectangular track groove that is slidably connected to the rectangular guide rail. The pressurizing station includes a hydraulic press for pressing down the superplastic heating device and a lifting platform for lifting the transport vehicle. The lifting platform is provided with a positioning key that is inserted into the positioning groove. A pit is provided below the hydraulic press, and the lifting platform is set in the pit.

2. The pulsed superplastic forming production line according to claim 1, characterized in that, The pressurization station includes a hydraulic control device located within the molding area.

3. The pulsed superplastic forming production line according to claim 1, characterized in that, The superplastic heating device uses an electric heating furnace, which includes an upper furnace body and a lower furnace body with a heating chamber. The opening of the heating chamber faces upward for sealing by the upper furnace body. The lower furnace body is provided with a guide column, and the upper furnace body is slidably connected to the guide column. A lower mold is provided inside the heating chamber. An upper mold for closing with the lower mold is provided on the upper furnace body. A lifting ring is provided on the upper furnace body. A side door and an air inlet communicating with the heating chamber are provided on the lower furnace body.

4. The pulsed superplastic forming production line according to claim 3, characterized in that, The electric heating furnace is equipped with an auxiliary hydraulic device for applying pressure to the upper furnace body and the lower furnace body in opposite directions, and the upper furnace body is equipped with a pressure sensor for feeding back the pressure applied by the hydraulic press.

5. The pulsed superplastic forming production line according to claim 3, characterized in that, The part-retrieving device includes a part-retrieving robotic arm assembly for retrieving finished products and a filling robotic arm assembly for filling blanks. Both the part-retrieving robotic arm assembly and the filling robotic arm assembly include a lifting robotic arm and a gripping robotic arm.

6. The pulsed superplastic forming production line according to claim 3, characterized in that, The pressurization system includes an air source station and a water and electricity station located before and after the hydraulic press along the pressurization conveying line in the conveying direction. The water and electricity station includes a water and electricity pile and a connecting robotic arm. The water and electricity pile is equipped with an electrical female connector, a cooling water supply port, and a cooling water return port. The lower furnace body is equipped with an electric heating mechanism and a cooling pipeline. The electric heating mechanism is equipped with an electrical male connector. The cooling pipeline has a cooling water inlet and a cooling water outlet. The connecting robotic arm is used to connect the electrical male connector to the electrical female connector, the cooling water inlet and the cooling water supply port, and the cooling water outlet and the cooling water return port. The air source station includes an air source device and a connecting robotic arm. The air source device is equipped with an air supply connector, and the connecting robotic arm is used to insert the air supply connector into the air inlet.

7. The pulsed superplastic forming production line according to claim 1, characterized in that, It includes a control cabinet for controlling the pressurization system, the part retrieval system, and the transportation system, the control cabinet being located within the filling area.

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