Large stainless steel welding H-shaped steel assembling and welding positioning device

Abstract

The invention relates to the technical field of stainless steel welding, in particular to a large stainless steel welding H-shaped steel assembly welding positioning device. Comprising a plurality of bases, an arc-shaped frame is fixedly connected to the upper sides of the bases, a frame is fixedly connected to the interior of the arc-shaped frame, a placing plate is arranged in the frame, a buffering device, a clamping device and a locking device are arranged in the arc-shaped frame, and the buffering device is arranged below the placing plate; according to the device, the placing plate is driven by the gravity of the H-shaped steel to move downwards, the rack moves downwards at a low speed under the cooperation of the piston rod and the piston barrel, the buffering effect is further achieved through the cooperation of the buffering spring, impact damage caused when the H-shaped steel falls is avoided, and therefore the protection effect is achieved; the clamping plates are driven to clamp the two sides of a wing plate of the H-shaped steel, clamping operation of workers is not needed, time and labor are saved, and the welding efficiency of the H-shaped steel is improved.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel welding, in particular to a large stainless steel welding H-shaped steel assembly welding positioning device. Background Art

[0002] H-shaped steel is an economical and efficient profile with a more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. It is named because its cross-section is the same as the English letter H. H-shaped steel has the advantages of strong bending resistance, simple construction, cost savings and light structural weight. It has been widely used as a building material in industries such as construction, bridges, tower bridges and grids. In order to ensure the welding quality of H-shaped steel, the welding of large H-shaped steel requires a high degree of precision to ensure the uniformity of the weld and the stability of the structure.

[0003] When welding existing H-shaped steel, manual methods are currently used to place the H-shaped steel. A crane is required to lift the H-shaped steel and place it on a frame. Since the H-shaped steel is very large in size and weight, a large impact will occur during placement, which can easily cause deformation of the H-shaped steel. At the same time, vibration will occur during welding, resulting in a small position offset, which the staff cannot quickly detect, resulting in the H-shaped steel being welded loosely and posing certain safety hazards. In addition, the processing position of the welded H-shaped steel needs to be constantly adjusted during welding, so the H-shaped steel needs to be flipped over. During the flipping, the staff constantly replaces and disassembles the positioning fixture kit, which results in a high work intensity and reduces the processing efficiency. Summary of the invention

[0004] The object of the present invention is to provide a large stainless steel H-beam assembly welding positioning device to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, a large stainless steel H-beam welding and positioning device is provided, comprising a plurality of bases, wherein the upper sides of the plurality of bases are fixedly connected with arc frames, the interior of the arc frames is fixedly connected with frames, a placement plate is arranged inside the frames, a buffer device, a clamping device and a locking device are arranged inside the arc frames, and the buffer device is arranged below the placement plate;

[0006] The placement plate is used to place H-shaped steel, and the H-shaped steel drives the placement plate to move downward under the action of gravity, and the placement plate drives the buffer device to work, and the buffer device works to buffer the H-shaped steel when it is placed;

[0007] The buffer device drives the clamping device to move during buffering, and the clamping device moves to clamp the two sides of the H-shaped steel;

[0008] When the placement plate moves downward to the lowest position, the placement plate drives the locking device to move, and the movement of the locking device is used to fix the position of the clamping device.

[0009] As a further improvement of the present technical solution, the frame is U-shaped, a fixed plate is fixedly connected to the inside of the frame, and the fixed plate is arranged below the placement plate, sliding grooves are provided on the inner walls on both sides of the frame, and the two ends of the placement plate are slidably connected to the sliding grooves, the middle position of the placement plate is trapezoidal, and placement grooves are provided at both ends of the placement plate.

[0010] As a further improvement of the present technical solution, the buffer device includes a rack fixedly connected to the lower side of the placing plate, and through holes are provided inside the fixed plate and the frame. The size of the through holes is larger than the size of the rack. The lower end of the rack passes through the through holes inside the fixed plate and the frame in sequence. A buffer spring is fixedly connected between the lower end of the rack and the inner wall of the arc frame. When the placing plate moves downward, the rack is driven downward, and the rack moves to squeeze the buffer spring. The buffer spring buffers the downward movement of the H-shaped steel.

[0011] As a further improvement of the present technical solution, connecting plates are fixedly connected to both sides of the lower end of the rack, two piston cylinders are fixedly connected to the inner wall of the arc frame, a piston rod is slidably connected to the inside of the piston cylinder, one end of the piston rod away from the piston cylinder is fixedly connected to the lower side of the connecting plate, a limiting flow hole is provided on the side of the piston cylinder away from the connecting plate, a buffer spring is fixedly connected between the lower end of the rack and the inner wall of the arc frame, when the rack moves downward, the connecting plate is driven downward, the connecting plate is driven downward, the piston rod is driven downward, the downward movement of the piston rod limits the downward movement speed of the rack, and further buffering is performed in cooperation with the buffer spring.

[0012] As a further improvement of the present technical solution, the clamping device is symmetrically arranged in two groups, and the clamping device includes clamping plates arranged on both side walls of the frame. The upper side of the clamping plate is in an inverted shape, and the inner wall of the inverted shape fits with the upper side of the H-shaped steel. The upper side of the frame is higher than the upper side of the clamping plate.

[0013] As a further improvement of the present technical solution, two cylindrical rods are fixedly connected inside the frame, a No. 1 gear is fixedly connected to the cylindrical rod, the No. 1 gear is meshed with the rack, a rotating rod is fixedly connected to the cylindrical rod, one end of the rotating rod away from the cylindrical rod passes through the frame and extends to the inside of the arc frame, one end of the rotating rod is rotatably connected to a moving rod, the end of the moving rod away from the rotating rod passes through the frame and is fixedly connected to one side of the clamping plate, when the rack moves downward, it drives the No. 1 gear to rotate, the No. 1 gear drives the rotating rod to rotate inward, the rotation of the rotating rod drives the moving rod to rotate, and the rotation of the moving rod drives the clamping plate to clamp both sides of the H-shaped steel.

[0014] As a further improvement of the technical solution, the locking device includes a trigger switch fixedly connected to the inner bottom wall of the slide groove, and electric telescopic rods are fixedly connected to the inner sides of the frame, and one end of the electric telescopic rod is fixedly connected to a toothed plate, and the toothed plate is meshed with gear No. 1. When the placement plate moves down to the lowest end, the trigger switch will be squeezed, and the trigger switch will trigger the electric telescopic rod to move, and the electric telescopic rod drives the toothed plate to move to fix the position of gear No. 1.

[0015] As a further improvement of the technical solution, the arc frame is internally slidably connected with a No. 2 gear, a motor is provided on the upper side of the base, the output end of the motor is fixedly connected with a No. 3 gear, the No. 3 gear is meshingly connected with the No. 2 gear, the starting motor drives the No. 3 gear to rotate, the rotation of the No. 3 gear drives the arc frame to rotate, and the arc frame drives the H-shaped steel to flip.

[0016] As a further improvement of the technical solution, a V-shaped side plate is rotatably connected to one side of the frame, a T-shaped plate is slidably connected to the middle position of the V-shaped side plate, the lower side of the T-shaped plate is combined with the H-shaped steel web, a compression spring is fixedly connected between the T-shaped plate and the V-shaped side plate, and the compression spring is sleeved on the T-shaped plate, the other end of the V-shaped side plate is placed on the frame and fixedly connected to the frame by bolts, the V-shaped side plate is rotated to fix the other end of the V-shaped side plate on the frame, the V-shaped side plate drives the T-shaped plate to fit the H-shaped steel and squeeze the compression spring, so that the T-shaped plate further fixes the H-shaped steel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the large stainless steel welded H-beam assembly welding positioning device, the placement plate is driven to move downward by the weight of the H-beam itself, and the downward movement of the placement plate drives the rack to move. Through the cooperation of the piston rod and the piston cylinder, a reaction force is applied to the rack, so the downward movement of the piston rod limits the downward movement speed of the rack, so that the rack moves downward at a slower speed, and cooperates with the buffer spring to further perform a buffering effect, thereby avoiding impact damage when the H-beam falls, thereby playing a protective role.

[0019] 2. In the large stainless steel H-beam welding and positioning device, when the H-beam moves downward by its own gravity, the rack drives the rotating rod to rotate inward, thereby driving the clamping plate to approach the wing plate of the H-beam and clamp the two sides of the wing plate of the H-beam. There is no need for the staff to perform clamping operations, which saves time and effort and improves the welding efficiency of the H-beam.

[0020] 3. In the large stainless steel H-beam welding and positioning device, when the placement plate moves downward to the lowest end, it squeezes the trigger switch, which triggers the electric telescopic rod to move. The electric telescopic rod drives the tooth plate to move and lock the position of the No. 1 gear, so that the clamping plate maintains a stable clamping force when clamping the H-beam, thereby improving the stability of the H-beam when flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a first overall structural schematic diagram of the present invention;

[0022] Figure 2 It is a second overall structural schematic diagram of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the placement plate of the present invention;

[0024] Figure 4 It is a cross-sectional schematic diagram of the arc frame of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the framework of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the fixing plate of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the buffer device of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the locking device of the present invention;

[0029] Fig. 9 It is a schematic structural diagram of the clamping device of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the V-shaped side panel of the present invention being opened;

[0031] Fig.11 It is a schematic structural diagram of the V-shaped side panel of the present invention being closed.

[0032] The meaning of each number in the figure is:

[0033] 1. Base; 11. Arc frame; 12. Frame; 13. Placement plate; 14. Fixing plate; 15. V-shaped side plate; 16. T-shaped plate; 17. Compression spring; 18. No. 2 gear; 181. No. 3 gear; 182. Motor;

[0034] 2. Buffer device; 21. Rack; 22. Connecting plate; 23. Piston rod; 24. Piston cylinder; 25. Flow limiting hole; 26. Buffer spring;

[0035] 3. Clamping device; 31. Clamping plate; 32. Gear No. 1; 33. Rotating rod; 34. Moving rod; 35. Cylindrical rod;

[0036] 4. Locking device; 41. Trigger switch; 42. Electric telescopic rod; 43. Tooth plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of 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.

[0038] 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 a limitation on the present invention.

[0039] See also Figure 1-Figure 4 As shown, the purpose of this embodiment is to provide a large stainless steel welded H-beam assembly welding positioning device, including multiple groups of bases 1, the upper side of the multiple groups of bases 1 is fixedly connected with an arc frame 11, the inside of the arc frame 11 is fixedly connected with a frame 12, the inside of the frame 12 is provided with a placement plate 13, the inside of the arc frame 11 is provided with a buffer device 2 and a clamping device 3 and a locking device 4, and the buffer device 2 is arranged below the placement plate 13;

[0040] The placement plate 13 is used to place the H-shaped steel. The H-shaped steel drives the placement plate 13 to move downward under the action of gravity. The placement plate 13 drives the buffer device 2 to work. The buffer device 2 is used to buffer the H-shaped steel when it is placed to avoid impact damage when the H-shaped steel falls, thereby playing a protective role.

[0041] The buffer device 2 drives the clamping device 3 to move during buffering, and the clamping device 3 moves to clamp both sides of the H-beam, without the need for workers to perform clamping operations, saving time and effort, and improving the welding efficiency of the H-beam;

[0042] When the placement plate 13 moves downward to the lowest position, the placement plate 13 drives the locking device 4 to move, and the movement of the locking device 4 is used to lock the position of the clamping device 3, so that the clamping plate 31 maintains a stable clamping force when clamping the H-beam, thereby improving the stability of the H-beam when flipping.

[0043] See also Figure 7-Figure 9 As shown, the frame 12 is U-shaped, and a fixing plate 14 is fixedly connected to the inside of the frame 12, and the fixing plate 14 is arranged below the placement plate 13. Slide grooves are provided on the inner walls on both sides of the frame 12, and the two ends of the placement plate 13 are slidably connected to the slide grooves. The middle position of the placement plate 13 is trapezoidal, and placement grooves are provided at both ends of the placement plate 13. The H-shaped steel includes a web and a wing plate. When in use, the H-shaped steel is lifted and placed on the placement plate 13, so that the wing plate of the H-shaped steel is placed in the slide groove on the placement plate 13, and the web is located at the trapezoidal position of the placement plate 13.

[0044] See also Figure 5-Figure 7 As shown, the buffer device 2 includes a rack 21 fixedly connected to the lower side of the placement plate 13, and through holes are opened inside the fixed plate 14 and the frame 12. The size of the through holes is larger than the size of the rack 21. The lower end of the rack 21 passes through the through holes inside the fixed plate 14 and the frame 12 in sequence. A buffer spring 26 is fixedly connected between the lower end of the rack 21 and the inner wall of the arc frame 11. As the gravity of the H-shaped steel drives the placement plate 13 to move downward, the placement plate 13 moves downward and drives the rack 21 to move downward and squeeze the buffer spring 26. The movement of the rack 21 applies pressure to the buffer spring 26, so that the buffer spring 26 has a buffering effect on the downward movement of the H-shaped steel, thereby avoiding the collision of the H-shaped steel with the placement plate 13 when falling, causing impact damage, thereby playing a protective role.

[0045] See also Figure 7As shown, connecting plates 22 are fixedly connected to both sides of the lower end of the rack 21, two piston cylinders 24 are fixedly connected to the inner wall of the arc frame 11, and a piston rod 23 is slidably connected to the inside of the piston cylinder 24. The end of the piston rod 23 away from the piston cylinder 24 is fixedly connected to the lower side of the connecting plate 22, and a limiting flow hole 25 is provided on the side of the piston cylinder 24 away from the connecting plate 22. A buffer spring 26 is fixedly connected between the lower end of the rack 21 and the inner wall of the arc frame 11. When the rack 21 moves downward, it drives the connecting plate 22 to move downward synchronously. The downward movement of the connecting plate 22 drives the piston rod 23 to move downward, and the downward movement of the piston rod 23 can It is able to exert pressure on the space below the interior of the piston cylinder 24, causing the foreign air in the internal space of the piston cylinder 24 to flow out from the flow limiting hole 25. Since the aperture of the flow limiting hole 25 is small, the air pressure in the piston cylinder 24 increases sharply, and a reaction force is exerted on the rack 21 through the cooperation of the piston rod 23 and the piston cylinder 24. Therefore, the downward movement of the piston rod 23 limits the downward movement speed of the rack 21, so that the rack 21 maintains a slower speed and moves downward, cooperating with the buffer spring 26 to further perform a buffering effect, while protecting the buffer spring 26 and increasing the service life of the buffer spring 26.

[0046] See also Figure 8 and Fig. 9 As shown, the clamping device 3 is symmetrically arranged in two groups. The clamping device 3 includes a clamping plate 31 arranged on the two side walls of the frame 12. Two cylindrical rods 35 are fixedly connected inside the frame 12. The cylindrical rod 35 is fixedly connected to a No. 1 gear 32. The No. 1 gear 32 is meshed and connected with the rack 21. A rotating rod 33 is fixedly connected to the cylindrical rod 35. The end of the rotating rod 33 away from the cylindrical rod 35 passes through the frame 12 and extends to the inside of the arc frame 11. One end of the rotating rod 33 is rotatably connected to a moving rod 34. The end of the moving rod 34 away from the rotating rod 33 passes through the frame 12 and is fixedly connected to one side of the clamping plate 31. When the rack 21 moves downward, it drives the No. 1 gear 32 to rotate. The rotation of the rotating rod 33 drives the moving rod 34 to rotate, and the rotation of the moving rod 34 drives the clamping plate 31 to approach the wing plate of the H-shaped steel and clamp the two sides of the wing plate of the H-shaped steel. Since the upper side of the clamping plate 31 is in an inverted shape, the inner wall of the inverted shape fits the upper side of the H-shaped steel, and the upper side of the frame 12 is higher than the upper side position of the clamping plate 31, so that the upper side of the clamping plate 31 clamps the upper side of the H-shaped steel, thereby ensuring the stability of the H-shaped steel. The H-shaped steel moves downward by its own gravity to clamp the H-shaped steel, without the need for staff to perform clamping operations, saving time and effort and improving welding efficiency.

[0047] See also Figure 1-Figure 4As shown, the arc frame 11 is internally slidably connected with the second gear 18, and the upper side of the base 1 is provided with a motor 182, and the output end of the motor 182 is fixedly connected with the third gear 181, and the third gear 181 is meshed with the second gear 18. When the motor 182 is started, the third gear 181 is driven to rotate, and the rotation of the third gear 181 drives the arc frame 11 to rotate, and the arc frame 11 drives the H-shaped steel to flip.

[0048] See also Figure 8 As shown, the locking device 4 includes a trigger switch 41 fixedly connected to the inner bottom wall of the slide slot, and electric telescopic rods 42 are fixedly connected to both sides of the interior of the frame 12, and one end of the electric telescopic rod 42 is fixedly connected to a toothed plate 43, and the toothed plate 43 is meshed and connected with the first gear 32. When the placement plate 13 moves down to the lowest end, the trigger switch 41 will be squeezed, and the trigger switch 41 will trigger the electric telescopic rod 42 to move, and the electric telescopic rod 42 drives the toothed plate 43 to move to lock the position of the first gear 32, so that the clamping plate 31 maintains a stable clamping force when clamping the H-shaped steel, ensuring that the H-shaped steel is in a stable state when flipping;

[0049] When the clamping of the H-beam needs to be released, the trigger switch 41 is pressed, and the trigger switch 41 triggers the electric telescopic rod 42 to move, and the electric telescopic rod 42 drives the toothed plate 43 to move, and the toothed plate 43 releases the position lock of the No. 1 gear 32. At this time, the H-beam is lifted upward, and the placement plate 13 drives the rack 21 to move upward. When the rack 21 moves upward, it drives the two clamping plates 31 to move away from each other, thereby releasing the clamping of the H-beam.

[0050] See also Figure 10-11 As shown, a V-shaped side plate 15 is rotatably connected to one side of the frame 12, and a T-shaped plate 16 is slidably connected to the middle position of the V-shaped side plate 15. The lower side of the T-shaped plate 16 is combined with the web of the H-shaped steel. A compression spring 17 is fixedly connected between the T-shaped plate 16 and the V-shaped side plate 15, and the compression spring 17 is sleeved on the T-shaped plate 16. The other end of the V-shaped side plate 15 is placed on the frame 12 and fixedly connected to the frame 12 by bolts. The V-shaped side plate 15 is rotated to fix the other end of the V-shaped side plate 15 on the frame 12. The V-shaped side plate 15 drives the T-shaped plate 16 to fit the web of the H-shaped steel and squeeze the compression spring 17, so that the T-shaped plate 16 further fixes the H-shaped steel, thereby improving the stability of the H-shaped plate.

[0051] When the large stainless steel welded H-beam assembly welding positioning device of the present invention is used, the wing plate of the H-beam is placed in the slide groove on the placement plate 13, and the web is located at the trapezoidal position of the placement plate 13. As the gravity of the H-beam drives the placement plate 13 to move downward, the placement plate 13 drives the rack 21 to move downward and squeeze the buffer spring 26 when it moves downward. The movement of the rack 21 applies pressure to the buffer spring 26, so that the buffer spring 26 has a buffering effect on the downward movement of the H-beam, thereby preventing the H-beam from colliding with the placement plate 13 when it falls and causing impact damage, thereby playing a protective role. When the rack 21 moves downward, it drives the connecting plate 22 to move downward synchronously, and the connecting plate 22 The downward movement drives the piston rod 23 downward. The downward movement of the piston rod 23 can exert pressure on the space below the interior of the piston cylinder 24, causing the exhaust gas in the internal space of the piston cylinder 24 to flow out from the limiting hole 25. Since the aperture of the limiting hole 25 is small, the air pressure in the piston cylinder 24 increases sharply. Through the cooperation of the piston rod 23 and the piston cylinder 24, a reaction force is exerted on the rack 21. Therefore, the downward movement of the piston rod 23 limits the downward movement speed of the rack 21, allowing the rack 21 to move downward at a slower speed, cooperating with the buffer spring 26 to further perform a buffering effect, while protecting the buffer spring 26 and increasing the service life of the buffer spring 26.

[0052] When the rack 21 moves downward, it drives the No. 1 gear 32 to rotate, and the No. 1 gear 32 drives the rotating rod 33 to rotate inward. The rotation of the rotating rod 33 drives the moving rod 34 to rotate. The rotation of the moving rod 34 drives the clamping plate 31 to approach the wing plate of the H-beam and clamp the two sides of the wing plate of the H-beam, so that the upper side of the clamping plate 31 clamps the upper side of the H-beam, ensuring the stability of the H-beam. The H-beam moves downward by its own gravity to clamp the H-beam. There is no need for staff to perform clamping operations, which saves time and effort and improves welding efficiency.

[0053] The starting motor 182 drives the No. 3 gear 181 to rotate, and the rotation of the No. 3 gear 181 drives the arc frame 11 to rotate, and the arc frame 11 drives the H-shaped steel to flip over. When the placement plate 13 moves down to the lowest end, it will squeeze the trigger switch 41, and the trigger switch 41 triggers the electric telescopic rod 42 to move, and the electric telescopic rod 42 drives the toothed plate 43 to move to lock the position of the No. 1 gear 32, so that the clamping plate 31 maintains a stable clamping force when clamping the H-shaped steel, ensuring that the H-shaped steel is in a stable state when flipping.

[0054] 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. A large stainless steel H-beam welding and positioning device, comprising a plurality of bases (1), wherein the upper sides of the plurality of bases (1) are fixedly connected with arc frames (11), characterized in that: The arc frame (11) is fixedly connected to a frame (12) inside, a placement plate (13) is arranged inside the frame (12), a buffer device (2), a clamping device (3) and a locking device (4) are arranged inside the arc frame (11), and the buffer device (2) is arranged below the placement plate (13); The placement plate (13) is used to place H-shaped steel, and the H-shaped steel drives the placement plate (13) to move downward under the action of gravity, and the placement plate (13) drives the buffer device (2) to work, and the buffer device (2) works to buffer the H-shaped steel when it is placed; The buffer device (2) drives the clamping device (3) to move during buffering, and the clamping device (3) moves to clamp the two sides of the H-shaped steel; When the placement plate (13) moves downward to the lowest position, the placement plate (13) drives the locking device (4) to move, and the movement of the locking device (4) is used to fix the position of the clamping device (3).

2. The large stainless steel H-beam welding and positioning device according to claim 1 is characterized in that: The frame (12) is arranged in a U-shape, a fixing plate (14) is fixedly connected inside the frame (12), and the fixing plate (14) is arranged below the placement plate (13), sliding grooves are provided on the inner walls on both sides of the frame (12), and the two ends of the placement plate (13) are slidably connected to the sliding grooves, the middle position of the placement plate (13) is arranged in a trapezoidal shape, and the two ends of the placement plate (13) are provided with placement grooves.

3. The large stainless steel H-beam welding and positioning device according to claim 2 is characterized in that: The buffer device (2) comprises a rack (21) fixedly connected to the lower side of the placement plate (13); through holes are provided inside the fixed plate (14) and the frame (12); the size of the through holes is larger than the size of the rack (21); the lower end of the rack (21) passes through the through holes inside the fixed plate (14) and the frame (12) in sequence; a buffer spring (26) is fixedly connected between the lower end of the rack (21) and the inner wall of the arc frame (11); when the placement plate (13) moves downward, the rack (21) is driven to move downward; the rack (21) moves to squeeze the buffer spring (26); and the buffer spring (26) buffers the downward movement of the H-shaped steel.

4. The large stainless steel H-beam assembly welding positioning device according to claim 3 is characterized in that: The lower ends of the rack (21) are fixedly connected with connecting plates (22), the inner wall of the arc frame (11) is fixedly connected with two piston cylinders (24), the interior of the piston cylinder (24) is slidably connected with a piston rod (23), one end of the piston rod (23) away from the piston cylinder (24) is fixedly connected to the lower side of the connecting plate (22), and a limiting flow hole (25) is provided on the side of the piston cylinder (24) away from the connecting plate (22), and a buffer spring (26) is fixedly connected between the lower end of the rack (21) and the inner wall of the arc frame (11), when the rack (21) moves downward, the connecting plate (22) is driven downward, and the downward movement of the connecting plate (22) drives the piston rod (23) downward, and the downward movement of the piston rod (23) limits the downward movement speed of the rack (21), and further buffering is performed in cooperation with the buffer spring (26).

5. The large stainless steel H-beam welding and positioning device according to claim 1 is characterized in that: The clamping device (3) is symmetrically arranged in two groups, and the clamping device (3) comprises clamping plates (31) arranged on the two side walls of the frame (12). The upper side of the clamping plate (31) is in an inverted shape, and the inner wall of the inverted shape fits the upper side of the H-shaped steel. The upper side of the frame (12) is higher than the upper side of the clamping plate (31).

6. The large stainless steel H-beam welding and positioning device according to claim 1 is characterized in that: Two cylindrical rods (35) are fixedly connected inside the frame (12), and a first gear (32) is fixedly connected to the cylindrical rod (35). The first gear (32) is meshed with the rack (21). A rotating rod (33) is fixedly connected to the cylindrical rod (35). One end of the rotating rod (33) away from the cylindrical rod (35) passes through the frame (12) and extends to the inside of the arc frame (11). One end of the rotating rod (33) is rotatably connected to a moving rod (34). One end of the moving rod (34) away from the rotating rod (33) passes through the frame (12) and is fixedly connected to one side of the clamping plate (31). When the rack (21) moves downward, it drives the first gear (32) to rotate, and the first gear (32) drives the rotating rod (33) to rotate inwardly. The rotation of the rotating rod (33 drives the moving rod (34) to rotate, and the rotation of the moving rod (34) drives the clamping plate (31) to clamp the two sides of the H-shaped steel.

7. The large stainless steel H-beam assembly welding positioning device according to claim 2 is characterized in that: The locking device (4) comprises a trigger switch (41) fixedly connected to the inner bottom wall of the slide groove, and the electric telescopic rods (42) are fixedly connected to the inner sides of the frame (12), and one end of the electric telescopic rod (42) is fixedly connected to a toothed plate (43), and the toothed plate (43) is meshed with the first gear (32). When the placement plate (13) moves down to the lowest end, it squeezes the trigger switch (41), and the trigger switch (41) triggers the electric telescopic rod (42) to move, and the electric telescopic rod (42) drives the toothed plate (43) to move to fix the position of the first gear (32).

8. The large stainless steel H-beam assembly welding positioning device according to claim 1 is characterized in that: The arc frame (11) is internally slidably connected with a No. 2 gear (18), and a motor (182) is arranged on the upper side of the base (1). The output end of the motor (182) is fixedly connected with a No. 3 gear (181), and the No. 3 gear (181) is meshedly connected with the No. 2 gear (18). When the motor (182) is started, the No. 3 gear (181) is driven to rotate, and the rotation of the No. 3 gear (181) drives the arc frame (11) to rotate, and the arc frame (11) drives the H-shaped steel to flip.

9. The large stainless steel H-beam assembly welding positioning device according to claim 1 is characterized in that: A V-shaped side plate (15) is rotatably connected to one side of the frame (12), and a T-shaped plate (16) is slidably connected to the middle position of the V-shaped side plate (15). The lower side of the T-shaped plate (16) is combined with the H-shaped steel web. A compression spring (17) is fixedly connected between the T-shaped plate (16) and the V-shaped side plate (15), and the compression spring (17) is sleeved on the T-shaped plate (16). The other end of the V-shaped side plate (15) is placed on the frame (12) and fixedly connected to the frame (12) by bolts. The V-shaped side plate (15) is rotated to fix the other end of the V-shaped side plate (15) on the frame (12). The V-shaped side plate (15) drives the T-shaped plate (16) to fit the H-shaped steel and squeeze the compression spring (17), so that the T-shaped plate (16) is further fixed to the H-shaped steel.

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