An intelligent welding robot for steel fire door production

Abstract

The present invention relates to the field of automated welding technology, and in particular to an intelligent welding robot for producing steel fire doors, comprising a base, wherein the bottom of the base is fixedly connected to an electric slide rail, the outer side of the electric slide rail is slidably connected to a sliding frame, and the top edge of the base is fixedly connected to a welding chamber. The present invention drives a threaded rod and a No. 1 transmission wheel to rotate together through the drive of a No. 1 transmission wheel, and the No. 2 transmission wheel and a No. 3 transmission belt are rotated through the drive of the No. 2 transmission wheel, and the steel plates are spliced ​​together so that the spliced ​​node positions are pushed into the strip holes, and the No. 2 welding rod is used to weld the node positions of two bent steel plates. In this way, on the one hand, the limit shells in the vertical state on both sides can be used to ensure that the bent steel plates are spliced ​​and fixed to each other, and on the other hand, the welding gap problem in the nodes of the two vertical steel plates can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of automated welding, and in particular to an intelligent welding robot for producing steel fire doors. Background Art

[0002] Steel fire doors refer to doors with certain specified fire resistance performance, which are made of steel materials for door frames, door leaf frames and door leaf panels. If the door leaf is filled with materials, it is filled with fireproof and heat-insulating materials that are non-toxic and harmless to the human body, and equipped with fireproof hardware accessories. In the production process of steel fire doors, node welding is a key manufacturing link;

[0003] The Chinese announcement number is: CN118616948A, which discloses a welding device for a steel fire door, including a platform, on which a number of limit devices are arranged. Furthermore, the limit devices are used to limit the moving distance of the frame. Furthermore, the fire door frame is composed of four groups of frames, and the frame is generally U-shaped in cross-section. At the same time, the openings of each frame are aligned in the same direction and fixed by welding. The door frame frame can be opened by the expansion structure in the limit assembly, and the frame side wall can be expanded to the correct position in conjunction with the limit plate, ensuring the alignment of the frame during welding and improving the welding stability. Through the coordinated use of the measuring structure, the variable resistance structure and the electric push rod, the thickness of the side walls of different door frame frames can be measured automatically, quickly and accurately. The variable resistance structure can adjust the expansion force according to the thickness of the side walls of different frames, thereby stabilizing the entire expansion process and not easily damaging the keel;

[0004] Although the above invention can expand the frame through the expansion structure in the limit assembly, and cooperate with the limit plate to align the frame position to improve stability, it is considered that the heat welding of some fire doors after the steel plate bending process may cause deformation of the steel plate bending position, and the steel plate still has a certain plasticity after bending, so that some positions may not be aligned or too large a gap may be generated between the two steel plates during the assembly and welding process;

[0005] In view of this, we propose an intelligent welding robot for the production of steel fire doors. Summary of the invention

[0006] The object of the present invention is to provide an intelligent welding robot for producing steel fire doors to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides an intelligent welding robot for producing steel fire doors, comprising a base, a conveyor belt is installed on the inner side of the top of the base, a blocking strip is fixedly connected to the outer wall of the conveyor belt, an electric slide rail is fixedly connected to the bottom of the base, a sliding frame is slidably connected to the outer side of the electric slide rail, and a welding chamber is fixedly connected to the top edge of the base;

[0008] A sliding block is slidably connected to the top of the sliding frame, and a No. 1 welding rod is fixedly connected to one side of the sliding block;

[0009] The welding chamber is provided with a welding assembly for welding the edges and corners of the steel plate at the bending position, and a baffle is detachably connected to the outside of the welding chamber, and an assembly assembly for assembling the bent steel plate with the door frame or other components is installed on one side of the baffle;

[0010] The assembly component includes a limiting shell, the outer wall of the limiting shell is fixedly connected to a guard plate, a sliding column is arranged between the limiting shells on both sides, the inner sides of the guard plates on both sides are fixedly connected to extension plates, the extension plates are rotatably connected to a second rotating rod and a third rotating rod, and a cross plate is arranged on the inner side of the sliding column.

[0011] As a preferred embodiment of the present invention, the edge position of the base is a square annular groove with a hollow bottom, a transmission belt No. 1 is arranged in the square annular groove, and a motor No. 1 is fixedly connected in the square annular groove.

[0012] As a preferred embodiment of the present invention, the baffle is in the form of a vertical L-shaped plate as a whole, a strip hole is provided at a right angle position of the baffle, and the bottom of the welding chamber is in a hollow state.

[0013] As a preferred embodiment of the present invention, the welding assembly includes a threaded rod, which passes through the welding chamber and is rotatably connected to the welding chamber, the upper end of the threaded rod is fixedly connected to a No. 1 transmission wheel, the outer wall of the No. 1 transmission wheel is sleeved with a No. 2 transmission belt, the threaded rod is fixedly connected to the output end of the No. 1 motor, and the No. 1 transmission belt is sleeved on the outer wall of the threaded rod at one end close to the No. 1 motor.

[0014] As a preferred embodiment of the present invention, the middle end outer wall of the threaded rod is threadedly connected to a sliding disk, one side outer wall of the sliding disk is fixedly connected to a sliding plate, the sliding plate is slidably connected to the inner wall of the welding chamber, the sliding disk is fixedly connected to a bracket on the side away from the sliding plate, and the bracket is installed with a No. 2 welding rod at one end away from the sliding disk.

[0015] As a preferred embodiment of the present invention, a No. 2 motor is fixedly connected to the top of the limiting shell, and the No. 1, No. 2 and No. 3 rotating rods all pass through the limiting shell.

[0016] As a preferred embodiment of the present invention, a plurality of cross columns are fixedly connected at the peripheral positions between the guard plates on both sides, the sliding column is slidably connected to the outer wall of the cross column, the outer walls on both sides of the sliding column are provided with square grooves, and a fixing plate is fixedly connected in the square grooves, a sliding rod is slidably connected through the outer wall of the sliding column, the sliding rod is provided with a spring on the inner outer wall of the sliding column, the end of the sliding rod is rotatably connected to a rotating rod No. 1, and the outer wall of the rotating rod No. 1 is fixedly connected to a roller.

[0017] As a preferred embodiment of the present invention, the upper end of the No. 2 rotating rod is fixedly connected with a No. 2 transmission wheel, and the No. 2 transmission belt is sleeved on the outer wall of the No. 2 transmission wheel. The middle end of the No. 2 rotating rod on both sides is fixedly connected with a No. 3 transmission wheel, and the outer wall of the No. 3 transmission wheel on both sides is sleeved with a No. 3 transmission belt.

[0018] As a preferred embodiment of the present invention, the No. 3 rotating rod is fixedly connected to the output end of the No. 2 motor, the middle end of the No. 3 rotating rod is fixedly connected to a disc, the No. 3 rotating rod is located at a centrifugal position of the disc, and the lower ends of the No. 3 rotating rods on both sides are fixedly connected to connecting rods.

[0019] As a preferred embodiment of the present invention, a horizontal plate is installed on the outer wall of the disc, a plurality of circular holes are opened on the surface of the horizontal plate, the diameter of the circular holes is the same as the diameter of the disc, the horizontal plate and the roller are on the same horizontal plane, and the outer wall of the horizontal plate is in contact with the outer walls of the rollers on both sides.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the intelligent welding robot for producing fire doors, the threaded rod and the No. 1 transmission wheel are driven to rotate together by the No. 1 motor, and the No. 2 transmission wheel and the No. 3 transmission belt are rotated through the transmission of the No. 2 transmission wheel, so that the steel plates are spliced, and the spliced ​​node positions are pushed into the strip holes, and the No. 2 welding rod is used to weld the node positions of the two bent steel plates. In this way, on the one hand, the limit shells in the vertical state on both sides can be used to ensure the problem of splicing and fixing the bent steel plates to each other, and on the other hand, the welding gap problem in the nodes of the two vertical steel plates can be solved.

[0022] 2. In the intelligent welding robot produced by the steel fire door, the No. 3 rotating rod is rotated at a certain small angle by the drive of the No. 2 motor, and the disc and the rollers on the left and right sides are used to realize the reciprocating left and right movement of the sliding column. The outer wall of the sliding column can be installed with a fixed plate that partially limits the edge position of the keel. At this time, the fixed plate will simultaneously drive the vertical keels on both sides to align, so that they penetrate into the corner position and produce a certain vibration to the keel, making it tighter and firmer during splicing to prevent the appearance of welding gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall three-dimensional schematic diagram of the intelligent welding robot for producing fire doors of the present invention;

[0024] Figure 2 A three-dimensional schematic diagram of the combination of welding components and assembly components of the intelligent welding robot for producing fire doors of the present invention;

[0025] Figure 3 A three-dimensional schematic diagram of the interior of the assembly components of the intelligent welding robot for producing fire doors of the present invention;

[0026] Figure 4 A three-dimensional schematic diagram of the interior of a welding assembly of an intelligent welding robot for producing fire doors of the present invention;

[0027] Figure 5 A three-dimensional schematic diagram of the interior of the assembled components of the intelligent welding robot for producing fire doors of the present invention;

[0028] Figure 6 A schematic diagram of the positions of the sliding column and the horizontal plate of the intelligent welding robot for producing fire doors of the present invention;

[0029] Figure 7 A three-dimensional schematic diagram of the unfolding of the sliding column of the intelligent welding robot for producing fire doors of the present invention;

[0030] The meaning of each number in the figure is:

[0031] 1. Base; 11. Conveyor belt; 111. Blocking bar; 12. Electric slide rail; 13. Transmission belt No. 1; 2. Sliding rack; 21. Sliding block; 22. Welding rod No. 1; 3. Welding chamber; 31. Baffle; 311. Strip groove; 32. Motor No. 1; 33. Welding assembly; 331. Threaded rod; 332. Transmission wheel No. 1; 333. Sliding plate; 3331. Sliding plate; 3332. Bracket; 34. Welding rod No. 2; 35. Transmission belt No. 2;

[0032] 4. Assembling components; 41. Limiting shell; 411. No. 2 motor; 42. Guard plate; 421. Horizontal column; 43. Sliding column; 431. Square groove; 432. Fixed plate; 4321. Sliding rod; 4322. Spring; 433. No. 1 rotating rod; 434. Roller; 44. Extension plate; 441. No. 2 rotating rod; 4411. No. 2 transmission wheel; 442. No. 2 transmission wheel; 443. No. 3 transmission belt; 45. No. 3 rotating rod; 451. Disc; 452. Connecting rod; 46. Horizontal plate; 461. Circular hole. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Embodiment 1

[0036] See also Figure 1-Figure 7 As shown, the present embodiment provides an intelligent welding robot for producing steel fire doors, comprising a base 1, a conveyor belt 11 is installed on the inner side of the top of the base 1, a blocking strip 111 is fixedly connected to the outer wall of the conveyor belt 11, an electric slide rail 12 is fixedly connected to the bottom of the base 1, a sliding frame 2 is slidably connected to the outer side of the electric slide rail 12, a welding chamber 3 is fixedly connected to the top edge of the base 1; a sliding block 21 is slidably connected to the top of the sliding frame 2, and a No. 1 welding rod 22 is fixedly connected to one side of the sliding block 21; a welding assembly 33 for welding the edges and corners of the steel plate bending position is arranged in the welding chamber 3, and a blocking strip 111 is detachably connected to the outer side of the welding chamber 3 Plate 31, one side of the baffle plate 31 is installed with an assembling component 4 for assembling the bent steel plate with a door frame or other components; the assembling component 4 includes a limiting shell 41, the outer wall of the limiting shell 41 is fixedly connected with a guard plate 42, a sliding column 43 is arranged between the limiting shells 41 on both sides, the inner sides of the guard plates 42 on both sides are fixedly connected with an extension plate 44, the extension plate 44 is rotatably connected with a second rotating rod 441 and a third rotating rod 45, a cross plate 46 is arranged on the inner side of the sliding column 43, the edge position of the base 1 is a square annular groove with a hollow bottom, a No. 1 transmission belt 13 is arranged in the square annular groove, and a No. 1 motor 32 is fixedly connected in the square annular groove.

[0037] like Figure 2-Figure 4As shown, the baffle 31 is a vertical L-shaped plate as a whole, a strip hole 311 is opened at a right angle position of the baffle 31, the bottom of the welding chamber 3 is hollowed out, and the welding assembly 33 includes a threaded rod 331, the threaded rod 331 passes through the welding chamber 3 and is rotatably connected to the welding chamber 3, the upper end of the threaded rod 331 is fixedly connected to a No. 1 transmission wheel 332, the outer wall of the No. 1 transmission wheel 332 is sleeved with a No. 2 transmission belt 35, the threaded rod 331 is fixedly connected to the output end of the No. 1 motor 32, and the No. 1 transmission wheel 332 is sleeved with a No. 2 transmission belt 35. The threaded rod 331 is fixedly connected to the output end of the No. 1 motor 32. The transmission belt 13 is sleeved on the outer wall of the threaded rod 331 at one end close to the motor 32, the middle end outer wall of the threaded rod 331 is threadedly connected with a sliding disk 333, one side outer wall of the sliding disk 333 is fixedly connected with a sliding plate 3331, the sliding plate 3331 is slidably connected to the inner wall of the welding chamber 3, the sliding disk 333 is fixedly connected with a bracket 3332 on the side away from the sliding plate 3331, and the bracket 3332 is installed with a No. 2 welding rod 34 at the end away from the sliding disk 333.

[0038] like Figure 3-Figure 7 As shown, a No. 2 motor 411 is fixedly connected to the top of the limiting shell 41, and a No. 1, No. 2 rotating rod 441 and a No. 3 rotating rod 45 all penetrate the limiting shell 41, and a plurality of cross columns 421 are fixedly connected at the peripheral positions between the two side guard plates 42, and the sliding column 43 is slidably connected to the outer wall of the cross column 421. The outer walls of the two sides of the sliding column 43 are provided with square grooves 431, and a fixing plate 432 is fixedly connected in the square groove 431. The outer wall of the sliding column 43 penetrates and is slidably connected with a sliding rod 4321, and the sliding rod 4321 is sleeved with a spring 4322 on the inner outer wall of the sliding column 43. The end of the sliding rod 4321 is rotatably connected to the No. 1 rotating rod 433, and the outer wall of the No. 1 rotating rod 433 is fixedly connected with a roller 434, and the upper end of the No. 2 rotating rod 441 is fixedly connected with the No. 2 transmission wheel 4411, and the No. 2 The No. 3 transmission belt 35 is sleeved on the outer wall of the No. 2 transmission wheel 4411, the middle end of the No. 2 rotating rod 441 on both sides is fixedly connected with the No. 3 transmission wheel 442, the outer wall of the No. 3 transmission wheel 442 on both sides is sleeved with the No. 3 transmission belt 443, the No. 3 rotating rod 45 is fixedly connected to the output end of the No. 2 motor 411, the middle end of the No. 3 rotating rod 45 is fixedly connected with a disk 451, the No. 3 rotating rod 45 is located at the centrifugal position of the disk 451, the lower end of the No. 3 rotating rod 45 on both sides is fixedly connected with a connecting rod 452, the outer wall of the disk 451 is installed with a cross plate 46, the surface of the cross plate 46 is provided with a plurality of circular holes 461, the diameter of the circular holes 461 is the same as the diameter of the disk 451, the cross plate 46 and the roller 434 are on the same horizontal plane, and the outer wall of the cross plate 46 is in contact with the outer walls of the rollers 434 on both sides.

[0039] It can be seen from this that when the folded steel plates need to be assembled and welded, Figure 3-Figure 7As shown, after the staff puts the steel plate with the corner bent in the previous process on the base 1, the conveyor belt 11 is started, and the steel plate is conveyed by the conveyor belt 11 to between the two welding chambers 3 on one side, and after it is attached to the outer walls of the limiting shells 41 on both sides, at this time, the threaded rod 331 is driven by the No. 1 motor 32 to rotate, and at the same time, the threaded rod 331 drives the No. 1 transmission wheel 332 on its top to rotate, and at the same time, through the transmission of the No. 2 transmission belt 35, the No. 2 rotating rod 441 on both sides rotates together, and the No. 2 rotating rod 441 will drive the No. 2 transmission wheel 4411 to rotate, and the No. 3 transmission belt 443 will be driven to rotate during the rotation of the No. 2 transmission wheel 4411, and the No. 3 transmission belt 443 will be driven to rotate during the rotation of the No. 3 transmission belt 443, and the blocking blocks set on the outside of the No. 3 transmission belt 443 will be driven to move together, and the steel plate between the blocking blocks on both sides will be pushed to the outer wall of the limiting shell 41 perpendicular to it, and together with the blocking blocks in the vertical direction, the steel plate in the vertical direction is pieced together with it, The assembled node position will be pushed into the strip hole 311, and at this time, the sliding plate 333, the sliding plate 3331 and the second welding rod 34 are driven downward together by the rotation of the threaded rod 331, and the second welding rod 34 is used to weld the two bent steel plate node positions. In this way, on the one hand, the limit shells 41 on both sides in a vertical state can be used to ensure that the bent steel plates are spliced ​​and fixed to each other, and on the other hand, the welding gap problem in the nodes of the two vertical steel plates can be solved;

[0040] In addition, when welding the frame keel, the No. 3 rotating rod 45 is driven by the No. 2 motor 411 to rotate a certain small angle. At this time, the No. 3 rotating rod 45 will drive the disc 451 to rotate. Because the No. 3 rotating rod 45 is located at a centrifugal position on the surface of the disc 451, the No. 3 rotating rod 45 will drive the disc 451 to rotate centrifugally during the rotation of the No. 3 rotating rod 45. At the same time, the discs 451 on both sides will simultaneously drive the cross plate 46 to move in a circular manner. Then, when the cross plate 46 moves toward the rollers 434 on both sides, the roller 434 on one side and the sliding rod 4321 will slide toward the outside of the sliding column 43 and away from the roller 434 on the other side. At this time, the squeezed sliding rod 4321 transmits a signal to the No. 1 rotating rod 433 The roller 434 is rotated, and the friction between the roller 434 and the outer wall of the cross plate 46 causes the entire sliding column 43 to slide a short distance to one side. Because the cross plate 46 performs a circular motion, the rollers 434 on both sides are squeezed back and forth alternately during the left and right sliding process of the cross plate 46. And because the rollers 434 on both sides rotate in opposite directions, the sliding column 43 can be moved back and forth. In addition, the outer wall of the sliding column 43 can be installed with a limiting plate that partially limits the edge position of the keel. At this time, the limiting plate will simultaneously drive the vertical keels on both sides to align, make them penetrate into the corner position, and produce a certain vibration to the keel, so that it is tighter and stronger during splicing to prevent the appearance of welding gaps.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent welding robot for producing steel fire doors, comprising a base (1), characterized in that: A conveyor belt (11) is installed on the inner side of the top of the base (1); a blocking strip (111) is fixedly connected to the outer wall of the conveyor belt (11); an electric slide rail (12) is fixedly connected to the bottom of the base (1); a sliding frame (2) is slidably connected to the outer side of the electric slide rail (12); and a welding chamber (3) is fixedly connected to the top edge of the base (1); A sliding block (21) is slidably connected to the top of the sliding frame (2), and a first welding rod (22) is fixedly connected to one side of the sliding block (21); A welding assembly (33) for welding the corners of the bent steel plate is arranged in the welding chamber (3); a baffle (31) is detachably connected to the outside of the welding chamber (3); an assembling assembly (4) for assembling the bent steel plate with a door frame or other components is installed on one side of the baffle (31); The assembly component (4) comprises a limit shell (41), the outer wall of the limit shell (41) is fixedly connected to a guard plate (42), a sliding column (43) is arranged between the limit shells (41) on both sides, an extension plate (44) is fixedly connected to the inner side of the guard plates (42) on both sides, the extension plate (44) is rotatably connected to a second rotating rod (441) and a third rotating rod (45), and a transverse plate (46) is arranged on the inner side of the sliding column (43).

2. The intelligent welding robot for producing steel fire doors according to claim 1, characterized in that: The edge of the base (1) is a square annular groove with a hollow bottom, a first transmission belt (13) is arranged in the square annular groove, and a first motor (32) is fixedly connected in the square annular groove.

3. The intelligent welding robot for steel fire door production according to claim 2, characterized in that: The baffle plate (31) is in the form of a vertical L-shaped plate as a whole, a strip-shaped hole (311) is provided at a right angle to the baffle plate (31), and the bottom of the welding chamber (3) is in a hollow state.

4. The intelligent welding robot for producing steel fire doors according to claim 3, characterized in that: The welding assembly (33) comprises a threaded rod (331), the threaded rod (331) passing through the welding chamber (3) and being rotatably connected to the welding chamber (3), the upper end of the threaded rod (331) being fixedly connected to a first transmission wheel (332), the outer wall of the first transmission wheel (332) being sleeved with a second transmission belt (35), the threaded rod (331) being fixedly connected to the output end of a first motor (32), and the first transmission belt (13) being sleeved on the outer wall of one end of the threaded rod (331) close to the first motor (32).

5. The intelligent welding robot for producing steel fire doors according to claim 4, characterized in that: A sliding disk (333) is threadedly connected to the outer wall of the middle end of the threaded rod (331); a sliding plate (3331) is fixedly connected to the outer wall of one side of the sliding disk (333); the sliding plate (3331) is slidably connected to the inner wall of the welding chamber (3); a bracket (3332) is fixedly connected to the side of the sliding disk (3333) away from the sliding plate (3331); and a No. 2 welding rod (34) is installed on the end of the bracket (3332) away from the sliding disk (333).

6. The intelligent welding robot for producing steel fire doors according to claim 5, characterized in that: A second motor (411) is fixedly connected to the top of the limiting shell (41), and the first, second and third rotating rods (441) and (45) all pass through the limiting shell (41).

7. The intelligent welding robot for producing steel fire doors according to claim 6, characterized in that: A plurality of transverse columns (421) are fixedly connected at peripheral positions between the guard plates (42) on both sides, the sliding column (43) is slidably connected to the outer wall of the transverse column (421), the outer walls on both sides of the sliding column (43) are provided with square grooves (431), a fixing plate (432) is fixedly connected in the square groove (431), a sliding rod (4321) is slidably connected through the outer wall of the sliding column (43), the sliding rod (4321) is sleeved with a spring (4322) on the inner outer wall of the sliding column (43), the end of the sliding rod (4321) is rotatably connected to a first rotating rod (433), and the outer wall of the first rotating rod (433) is fixedly connected to a roller (434).

8. The intelligent welding robot for producing steel fire doors according to claim 7, characterized in that: The upper end of the No. 2 rotating rod (441) is fixedly connected to a No. 2 transmission wheel (4411), the No. 2 transmission belt (35) is sleeved on the outer wall of the No. 2 transmission wheel (4411), the middle ends of the No. 2 rotating rod (441) on both sides are fixedly connected to a No. 3 transmission wheel (442), and the outer walls of the No. 3 transmission wheels (442) on both sides are sleeved with a No. 3 transmission belt (443).

9. The intelligent welding robot for producing steel fire doors according to claim 8, characterized in that: The third rotating rod (45) is fixedly connected to the output end of the second motor (411); a disc (451) is fixedly connected to the middle end of the third rotating rod (45); the third rotating rod (45) is located at a centrifugal position of the disc (451); and connecting rods (452) are fixedly connected to the lower ends of the third rotating rod (45) on both sides.

10. The intelligent welding robot for producing steel fire doors according to claim 9, characterized in that: A transverse plate (46) is mounted on the outer wall of the circular disk (451). A plurality of circular holes (461) are formed on the surface of the transverse plate (46). The diameter of the circular holes (461) is the same as the diameter of the circular disk (451). The transverse plate (46) and the roller (434) are located on the same horizontal plane. The outer wall of the transverse plate (46) is in contact with the outer walls of the rollers (434) on both sides.

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