Rapid welding device for processing fireproof door steel structure

Abstract

The invention relates to the technical field of welding devices, and provides a rapid welding device for fireproof door steel structure processing, which can realize one-time clamping and double-sided welding, is more convenient to complete the overall welding operation of a fireproof door, can realize automatic centering and positioning of the fireproof door during clamping and positioning of the fireproof door, is more convenient to clamp and position, and improves the welding efficiency. A vertically symmetrical multi-point clamping structure is adopted, on one hand, normal welding is guaranteed, on the other hand, the influence of clamping on welding can be reduced through switching of a plurality of clamping points, the welding mechanical arm comprises an operation table, the welding mechanical arm and an adjusting supporting table, and the adjusting supporting table is rotationally connected into the operation table; a servo motor is installed at the bottom end of the operation table and used for adjusting driving and controlling of the supporting table relative to the operation table, the welding mechanical arm is installed at the top end of the operation table, two clamping openings are formed in the operation table, clamping frames are rotationally connected into the two clamping openings, and two control motors are installed at the bottom end of the operation table.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a rapid welding device for processing steel structures for fire doors. Background Technology

[0002] As is well known, fire doors are doors that can meet the requirements of fire resistance stability, integrity, and heat insulation within a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, and other similar locations. Due to the special nature of fire doors, considering both cost and protective and heat-insulating functions, they are usually made of metal steel and welded together. The rapid welding device used for fire door steel structure processing is an auxiliary device that helps to position fire door components during the welding process, ensuring smooth and efficient welding.

[0003] A search revealed that Chinese patent CN212070857U, published on December 4, 2020, discloses a rapid welding device for processing steel structures of fire doors. The device generally includes an operating table and a welding device body. Two mounting slots are formed on the upper surface of the operating table. A bidirectional threaded rod is rotatably connected to the inner wall of each mounting slot. The opposite ends of the two bidirectional threaded rods both penetrate the mounting slots and extend outwards. A clamping mechanism is threaded to the outer wall of each bidirectional threaded rod. A column is positioned on the upper surface of the operating table between the two mounting slots. A mounting block is fixedly connected to the top of the column. A movable slot is formed on the outer wall of the mounting block. A vertically positioned pin is rotatably connected to the inner wall of the movable slot. A mounting plate is fixedly sleeved on the outer wall of the pin. The mounting plate is connected to the mounting block via a rod. A first moving slot is formed on the side wall of the mounting plate. An electric push rod is fixedly connected to the inner wall of the first moving slot. A moving block is fixedly connected to the piston end of the electric push rod. The bottom of the moving block is connected to the welding device body. The top of the welding device is fixedly connected. During use, the two steel structures to be welded are placed in the two clamps within one of the mounting slots. The handle on the same side is rotated, causing the bidirectional threaded rod to rotate, thus moving the two threaded blocks synchronously towards the center and clamping the two steel structures to be welded together. The motor is started, driving the rotating shaft to rotate, causing the column to move within the second moving slot. When the welding device body moves to be aligned with the welding point, the motor is paused, and the electric push rod is started. The electric push rod drives the moving block to adjust the left and right position of the welding device body. When the welding device body moves above the welding point, the electric push rod is paused, and the welding device body is started to begin welding. Once the welding device body is working, the next set of steel structures to be welded can be placed in another mounting slot, and the above steps are repeated to clamp them, thus improving welding efficiency.

[0004] While the aforementioned existing technical solutions can serve as auxiliary welding operations for the steel structure of fire doors, the limitations on the structural freedom of the welding device body in terms of installation and drive mean that the welding device body can only complete single-sided welding of the fire door. Furthermore, the structure that positions the fire door components during welding is not conducive to the flipping and adjustment of the fire door during the welding process. As a result, the welding operation on the other side of the fire door inevitably requires manual assistance to disassemble the fire door after the welding of one side, and then flip and reposition the disassembled fire door to complete the overall welding operation of the fire door. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid welding device for processing steel structures of fire doors. It can achieve double-sided welding in a single clamping, making it easier to complete the overall welding operation of fire doors. Furthermore, it can automatically center and position the fire doors, making clamping and positioning more convenient. Moreover, it adopts a multi-point clamping structure with symmetrical upper and lower parts, which on the one hand ensures the normal progress of welding, and on the other hand, can reduce the impact of clamping on welding by switching multiple clamping points.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid welding device for processing steel structures of fire doors, comprising an operating table, a welding robotic arm, and an adjusting support platform. The adjusting support platform is rotatably connected within the operating table, and a servo motor is installed at the bottom of the operating table. The servo motor is used to adjust and control the drive of the support platform relative to the operating table. The welding robotic arm is installed at the top of the operating table. The operating table is provided with two clamping ports, each containing a clamping frame rotatably connected to it. Two control motors are installed at the bottom of the operating table, each used to adjust and control the rotation of the two clamping frames relative to the operating table. Fixed clamping frames are fixedly connected within each of the two clamping frames, and a first sliding clamping frame and a second sliding clamping frame are slidably connected within each of the two fixed clamping frames. A first electric telescopic rod and a second electric telescopic rod are installed on each of the two clamping frames. Two electric telescopic rods are used to drive two first sliding clamping frames relative to two clamping frames. Two second electric telescopic rods are used to drive two second sliding clamping frames relative to two clamping frames. Front and rear sliding frames are slidably connected within each clamping frame. Front electric telescopic rods are installed at the front end of each clamping frame, and are used to drive two front sliding frames relative to the two clamping frames. Rear electric telescopic rods are installed at the rear end of each clamping frame, and are used to drive two rear sliding frames relative to the two clamping frames. Multiple mounting cavities are provided on the two front sliding frames, the two rear sliding frames, the two fixed clamping frames, the two first sliding clamping frames, and the two second sliding clamping frames. Follow-up clamping structures are installed in each of the multiple mounting cavities.

[0007] Preferably, each of the plurality of follower clamping structures includes a central push rod, an upper clamping frame, and a lower clamping frame. The plurality of central push rods are slidably connected to the plurality of mounting cavities. An upper spur rack is fixedly connected to the top end of each of the plurality of central push rods, and a lower spur rack is fixedly connected to the bottom end of each of the plurality of central push rods. The plurality of upper clamping frames are rotatably connected to the plurality of mounting cavities, and the plurality of lower clamping frames are rotatably connected to the plurality of mounting cavities. An upper spur gear is fixedly connected to each of the plurality of upper clamping frames, and the plurality of upper spur gears mesh with the plurality of upper spur racks. A lower spur gear is fixedly connected to each of the plurality of lower clamping frames, and the plurality of lower spur gears mesh with the plurality of lower spur racks. A sleeve spring is connected to each of the plurality of central push rods, and the plurality of sleeve springs are fixedly connected to the mounting cavities.

[0008] Furthermore, each of the two first electric telescopic rods is equipped with a first wedge block, and each of the two first sliding clamps is provided with a first pushing slope, with each of the two first pushing slopes matching the two first wedge blocks respectively. Each of the two second electric telescopic rods is equipped with a second wedge block, and each of the two second sliding clamps is provided with a second pushing slope, with each of the two second pushing slopes matching the two second wedge blocks respectively.

[0009] Furthermore, each of the central push rods is connected to an enlarged push block via an adjusting spring, and the enlarged push blocks are used to increase the contact and pressing area between the central push rod and the fire door.

[0010] Furthermore, gear shafts are fixedly connected to the opposite ends of the two clamping frames, and the two gear shafts are rotatably connected to the operating table. Drive bevel gears are mounted on the output shafts of the two control motors via extension shafts. The two drive bevel gears mesh with driven bevel gears, and the two driven bevel gears are respectively connected to the two gear shafts.

[0011] Based on the aforementioned scheme, both clamping openings are provided with a first inner edge opening and a second inner edge opening. The first inner edge opening and the second inner edge opening located in the same clamping opening provide space for the first electric telescopic rod and the second electric telescopic rod installed on the clamping frame in the clamping opening to pass alternately.

[0012] Preferably, based on the aforementioned scheme, the welding robotic arm includes a six-degree-of-freedom robotic arm and a welding torch. The six-degree-of-freedom robotic arm is mounted on the top of the operating table, and the welding torch is mounted on the execution end of the six-degree-of-freedom robot.

[0013] Furthermore, based on the aforementioned scheme, the adjustment support platform is equipped with a weight reduction port.

[0014] Furthermore, based on the aforementioned solution, two leg rings are fixedly connected to the bottom of the operating platform.

[0015] Furthermore, a structurally reinforced connecting plate is fixedly connected between the two leg rings.

[0016] Compared with the prior art, the present invention provides a rapid welding device for processing steel structures of fire doors, which has the following beneficial effects: 1. In this invention, the workbench for clamping fire doors is formed by the cooperation of the operating table and the clamping frame, which can realize the flipping operation after single-sided welding of fire doors, realize double-sided welding with one clamping, and make it easier to complete the overall welding operation of fire doors.

[0017] 2. In this invention, the front sliding frame, the rear sliding frame, the fixed clamping frame, the first sliding clamping frame, and the second sliding clamping frame are combined to form a clamping and positioning structure for welding fire doors. This structure enables automatic centering and positioning of fire doors. By adjusting the support platform, the fire door can be supported during the clamping process, making clamping and positioning more convenient.

[0018] 3. In this invention, the specific fire door clamping execution structure is realized through the design of multiple follow-up clamping structures. Moreover, the multi-point clamping structure with symmetrical upper and lower parts is adopted, which on the one hand ensures the normal progress of welding, and on the other hand reduces the impact of clamping on welding by switching multiple clamping points. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle; Figure 3 For the present invention Figure 1 A magnified schematic diagram of the local structure at point B; Figure 4 This is a partial cross-sectional three-dimensional structural schematic diagram of the entire invention; Figure 5 This is a three-dimensional structural schematic diagram showing a partial cross-section of the slide, central push rod, and lower clamping frame in relation to the present invention. Figure 6 This is a three-dimensional structural diagram of the cooperation between the central push rod, upper straight rack, and sleeve spring of the present invention; Figure 7 This is a three-dimensional structural diagram showing the assembly of the central push rod, lower straight rack, and enlarged push block of the present invention. Figure 8 This is a three-dimensional structural diagram of the entire invention viewed from below; Figure 9For the present invention Figure 8 A magnified schematic diagram of the structure at point C in the middle; Figure 10 For the present invention Figure 8 A magnified schematic diagram of the local structure at point D; Figure 11 This is a three-dimensional structural diagram of the cooperation between the operating table, clamping frame, and first sliding clamping frame of the present invention; Figure 12 This is a three-dimensional structural diagram of the clamping frame, the first sliding clamping frame, and the first electric telescopic rod of the present invention. Figure 13 This is a partial cross-sectional three-dimensional structural schematic diagram of the clamping frame, the first sliding clamping frame, and the first electric telescopic rod of the present invention. Figure 14 This is a three-dimensional structural diagram of the clamping frame of the present invention; Figure 15 This is a three-dimensional structural diagram showing the relative distribution of the operating platform, the first electric telescopic rod, and the second electric telescopic rod of the present invention.

[0020] In the diagram: 1. Operating table; 2. Adjustment support table; 3. Servo motor; 4. Clamping frame; 5. Control motor; 6. Fixed clamping frame; 7. First sliding clamping frame; 8. Second sliding clamping frame; 9. First electric telescopic rod; 10. Second electric telescopic rod; 11. Front sliding frame; 12. Rear sliding frame; 13. Front electric telescopic rod; 14. Rear electric telescopic rod; 15. Mounting cavity; 16. Center push rod; 17. Upper clamping frame; 18. Lower clamping frame 19. Holder; 20. Upper spur rack; 21. Lower spur rack; 22. Upper spur gear; 23. Lower spur gear; 24. Spring sleeve; 25. First wedge block; 26. Second wedge block; 27. Enlarged push block; 28. Gear shaft; 29. ​​Driven bevel gear; 30. Driven bevel gear; 31. First inner edge opening; 32. Second inner edge opening; 33. Six-degree-of-freedom robotic arm; 34. Welding torch; 35. Weight reduction opening; 36. Leg ring; 37. Structural reinforcement connecting plate. Detailed Implementation

[0021] Example Please see the appendix Figure 1 -Appendix Figure 15A rapid welding device for processing steel structures of fire doors includes an operating table 1, a welding robotic arm, and an adjustable support platform 2. The adjustable support platform 2 is rotatably connected inside the operating table 1. By adjusting the configuration of the support platform 2, it can provide support for the fire door during clamping, making clamping and positioning more convenient. A servo motor 3 is installed at the bottom of the operating table 1. The servo motor 3 is used to adjust the drive and control of the support platform 2 relative to the operating table 1. The welding robotic arm is installed at the top of the operating table 1. The operating table 1 is provided with two clamping ports. Each of the two clamping frames 4 is rotatably connected to the operating table 1. Through the cooperation of the operating table 1 and the clamping frames 4, a workbench for clamping the fire door is formed, enabling the flipping operation after single-sided welding of the fire door, achieving double-sided welding with a single clamping, and facilitating the overall welding of the fire door. Two control motors 5 are installed at the bottom of the operating table 1. The two control motors 5 are used to adjust and control the rotation of the two clamping frames 4 relative to the operating table 1. Each of the two clamping frames 4 is fixedly connected to a fixed clamping bracket 6, and the two fixed clamping brackets 6 are slidably connected to a first sliding... The clamping frame 7 and the sliding clamping frame 8 are respectively equipped with a first electric telescopic rod 9 and a second electric telescopic rod 10. The two first electric telescopic rods 9 are used to drive the two first sliding clamping frames 7 relative to the two clamping frames 4, and the two second electric telescopic rods 10 are used to drive the two second sliding clamping frames 8 relative to the two clamping frames 4. A front sliding frame 11 and a rear sliding frame 12 are slidably connected inside each clamping frame 4. A front electric telescopic rod 13 is installed at the front end of each clamping frame 4. The movable telescopic rods 13 are used to drive the two front sliding frames 11 relative to the two clamping frames 4 respectively. The rear ends of the two clamping frames 4 are each equipped with a rear electric telescopic rod 14. The two rear electric telescopic rods 14 are used to drive the two rear sliding frames 12 relative to the two clamping frames 4 respectively. Through the cooperation of the front sliding frames 11, the rear sliding frames 12, the fixed clamping frame 6, the first sliding clamping frame 7 and the second sliding clamping frame 8, a clamping and positioning structure for welding fire doors is formed. The clamping and positioning of fire doors can realize automatic centering and positioning of fire doors.

[0022] It should be further explained that multiple mounting cavities 15 are provided on the two front sliding frames 11, the two rear sliding frames 12, the two fixed clamping frames 6, the two first sliding clamping frames 7, and the two second sliding clamping frames 8. Each mounting cavity 15 contains a follower clamping structure, which includes a central push rod 16, an upper clamping frame 17, and a lower clamping frame 18. The central push rods 16 are slidably connected to the mounting cavities 15. An upper rack 19 is fixedly connected to the top of each central push rod 16, and a lower rack 18 is fixedly connected to the bottom of each central push rod 16. The upper clamping frames 17 are rotatably connected to the mounting cavities 15, and the lower clamping frames 18... 8 are rotatably connected to multiple mounting cavities 15. Multiple upper clamping frames 17 are fixedly connected to upper spur gears 21, which mesh with multiple upper spur racks 19. Multiple lower clamping frames 18 are fixedly connected to lower spur gears 22, which mesh with multiple lower spur racks 20. Multiple central push rods 16 are connected to sleeve springs 23, which are fixedly connected to the mounting cavities 15. Through the design of multiple follow-up clamping structures, the specific fire door clamping execution structure is realized. Moreover, the multi-point clamping structure with upper and lower symmetry is adopted, which on the one hand ensures the normal progress of welding, and on the other hand reduces the impact of clamping on welding by switching multiple clamping points.

[0023] Furthermore, it should be noted that each of the two first electric telescopic rods 9 is equipped with a first wedge block 24, and each of the two first sliding clamping frames 7 is provided with a first pushing slope, which matches the two first pushing slopes respectively. Each of the two second electric telescopic rods 10 is equipped with a second wedge block 25, and each of the two second sliding clamping frames 8 is provided with a second pushing slope, which matches the two second pushing slopes respectively. This forms the specific drive structure for the first electric telescopic rod 9 and the first sliding clamping frame 7, and the specific drive structure for the second electric telescopic rod 10 and the second sliding clamping frame. Each of the multiple central push rods 16 is connected to an enlarged push block 26 via an adjusting spring. The multiple enlarged push blocks 26 are used to increase the contact and pressing area between the central push rod 16 and the fire door. Each of the two clamping frames 4 has a gear shaft 27 fixedly connected to its farthest ends. Both gear shafts 27 are rotatably connected to the operating table 1. Each of the two control motors 5 has a drive bevel gear installed on its output shaft via an extension shaft. Wheel 28, two driving bevel gears 28 are meshed with driven bevel gears 29, the two driven bevel gears 29 are respectively connected to two gear shafts 27, and two clamping ports are provided with a first inner edge opening 30 and a second inner edge opening 31. The first inner edge opening 30 and the second inner edge opening 31 located in the same clamping port provide space for the first electric telescopic rod 9 and the second electric telescopic rod 10 installed on the clamping frame 4 in the clamping port to pass alternately. The welding robot arm includes a six-degree-of-freedom robot arm 32 and a welding torch 33. The six-degree-of-freedom robot arm 32 is installed at the top of the operating table 1, and the welding torch 33 is installed at the execution end of the six-degree-of-freedom robot to ensure the degree of freedom in the welding process of the fire door. The adjusting support platform 2 is provided with a weight reduction port 34 to reduce the overall weight of the adjusting support platform 2 and reduce the drive load of the servo motor 3. Two leg rings 35 are fixedly connected to the bottom of the operating table 1 to form a support for the operating table 1, providing sufficient running space for the rotation and adjustment of the adjusting support platform 2. A structural reinforcement connecting plate 36 is fixedly connected between the two leg rings 35.

[0024] In this embodiment, the servo motor 3, control motor 5, first electric telescopic rod 9, second electric telescopic rod 10, front electric telescopic rod 13, and electric telescopic rod are all commercially available conventional devices known to those skilled in the art. In this patent, we only use them without making any improvements to their structure or function. Their setting method, installation method, and electrical connection method can be easily explained by those skilled in the art by following the instructions for use. Therefore, we will not elaborate on them here.

[0025] In summary, the working process of this rapid welding device for fire door steel structure processing is as follows: First, the device is installed at the desired location. Then, multiple fire doors to be welded are alternately placed into two clamping frames 4. During placement, the servo motor 3 controls the adjustment of the support platform 2 relative to the operating table 1, allowing the support platform 2 to alternately switch between the two clamping slots. This provides support during fire door clamping and also facilitates the turning out of the clamping slots during the fire door welding process, reducing the impact on the fire doors that need to be turned. During clamping, the first electric telescopic rod 9, the second electric telescopic rod 10, and the front electric... The telescopic rod 13 and the rear electric telescopic rod 14 work together to push out multiple follow-up clamping structures relative to the fire door. After the enlarged push block 26 contacts the fire door, the corresponding upper clamping frame 17 and lower clamping frame 18 rotate synchronously, thereby forming auxiliary positioning for welding the fire door. After positioning is completed, the six-degree-of-freedom robotic arm 32 and the welding machine matched with the welding gun 33 are activated to realize the welding operation of the fire door. After the upper end of the fire door is welded, the corresponding clamping frame 4 is flipped and adjusted by controlling the motor 5. Then, the lower end of the fire door is welded before it is rotated. At the same time, the two clamping frames 4 work alternately to realize the alternating cycle of clamping, welding, flipping and unloading.

Claims

1. A rapid welding device for processing steel structures of fire doors, comprising an operating table (1), characterized in that, It also includes a welding robotic arm and an adjusting support platform (2). The adjusting support platform (2) is rotatably connected to the operating table (1), and a servo motor (3) is installed at the bottom of the operating table (1). The servo motor (3) is used to adjust the driving and control of the support platform (2) relative to the operating table (1). The welding robotic arm is installed at the top of the operating table (1). The operating table (1) is provided with two clamping ports. A clamping frame (4) is rotatably connected in each of the two clamping ports. Two control motors (5) are installed at the bottom of the operating table (1). The two control motors (5) are respectively used for the rotation adjustment and control of the two clamping frames (4) relative to the operating table (1). A fixed clamping frame (6) is fixedly connected in each of the two clamping frames (4). A first sliding clamping frame (7) and a second sliding clamping frame (8) are slidably connected in each of the two fixed clamping frames (6). A first electric telescopic rod (9) and a second electric telescopic rod (10) are installed on each of the two clamping frames (4). The two first electric telescopic rods (9) are respectively used for the two first sliding... The clamping frame (7) is driven relative to the two clamping frames (4). The two second electric telescopic rods (10) are used to drive the two second sliding clamping frames (8) relative to the two clamping frames (4). The two clamping frames (4) are slidably connected with a front pair of slides (11) and a rear pair of slides (12). The front electric telescopic rods (13) are installed at the front end of the two clamping frames (4). The two front electric telescopic rods (13) are used to drive the two front pair of slides (11) relative to the two clamping frames (4). The rear ends of the two clamping frames (4) are each equipped with a rear electric telescopic rod (14). The two rear electric telescopic rods (14) are used to drive the two rear sliding frames (12) relative to the two clamping frames (4). Multiple mounting cavities (15) are provided on the two front sliding frames (11), the two rear sliding frames (12), the two fixed clamping frames (6), the two first sliding clamping frames (7), and the two second sliding clamping frames (8). Follow-up clamping structures are installed in the multiple mounting cavities (15).

2. The rapid welding device for processing steel structures of fire doors according to claim 1, characterized in that, Each of the multiple follower clamping structures includes a central push rod (16), an upper clamping frame (17), and a lower clamping frame (18). The multiple central push rods (16) are slidably connected within the multiple mounting cavities (15). An upper rack (19) is fixedly connected to the top of each of the multiple central push rods (16), and a lower rack (20) is fixedly connected to the bottom of each of the multiple central push rods (16). The multiple upper clamping frames (17) are rotatably connected within the multiple mounting cavities (15), and the multiple lower clamping frames (18) are... The components are rotatably connected in multiple mounting cavities (15). Multiple upper clamping frames (17) are fixedly connected with upper spur gears (21), and the multiple upper spur gears (21) mesh with multiple upper spur racks (19). Multiple lower clamping frames (18) are fixedly connected with lower spur gears (22), and the multiple lower spur gears (22) mesh with multiple lower spur racks (20). Multiple central push rods (16) are connected with sleeve springs (23), and the multiple sleeve springs (23) are fixedly connected in the mounting cavities (15).

3. The rapid welding device for processing steel structures of fire doors according to claim 2, characterized in that, Each of the two first electric telescopic rods (9) is equipped with a first wedge block (24), and each of the two first sliding clamps (7) is provided with a first pushing slope. The two first pushing slopes are respectively matched with the two first wedge blocks (24). Each of the two second electric telescopic rods (10) is equipped with a second wedge block (25), and each of the two second sliding clamps (8) is provided with a second pushing slope. The two second pushing slopes are respectively matched with the two second wedge blocks (25).

4. The rapid welding device for processing steel structures of fire doors according to claim 3, characterized in that, Each of the central push rods (16) is connected to an enlarged push block (26) via an adjusting spring. The enlarged push blocks (26) are used to increase the contact pressing area between the central push rod (16) and the fire door.

5. A rapid welding device for processing steel structures of fire doors according to claim 4, characterized in that, Gear shafts (27) are fixedly connected to the opposite ends of the two clamping frames (4). The two gear shafts (27) are rotatably connected inside the operating table (1). Drive bevel gears (28) are mounted on the output shafts of the two control motors (5) via extension shafts. The two drive bevel gears (28) are meshed with driven bevel gears (29). The two driven bevel gears (29) are respectively connected to the two gear shafts (27).

6. A rapid welding device for processing steel structures of fire doors according to claim 5, characterized in that, Both clamping ports are provided with a first inner edge opening (30) and a second inner edge opening (31). The first inner edge opening (30) and the second inner edge opening (31) located in the same clamping port provide space for the first electric telescopic rod (9) and the second electric telescopic rod (10) installed on the clamping frame (4) in the clamping port to pass through alternately.

7. A rapid welding device for processing steel structures of fire doors according to claim 6, characterized in that, The welding robot arm includes a six-degree-of-freedom robot arm (32) and a welding torch (33). The six-degree-of-freedom robot arm (32) is mounted on the top of the operating table (1), and the welding torch (33) is mounted on the execution end of the six-degree-of-freedom robot.

8. A rapid welding device for processing steel structures of fire doors according to claim 7, characterized in that, The adjustable support platform (2) is provided with a weight reduction port (34).

9. A rapid welding device for processing steel structures of fire doors according to claim 8, characterized in that, Two leg rings (35) are fixedly connected to the bottom of the operating table (1).

10. A rapid welding device for processing steel structures of fire doors according to claim 9, characterized in that, A structurally reinforced connecting plate (36) is fixedly connected between the two leg rings (35).

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