Special steel product welding device

Abstract

The invention belongs to the technical field of special steel product machining, and particularly relates to a special steel product welding device which comprises a bottom plate, a first supporting assembly is arranged at the upper end of the bottom plate, the first supporting assembly comprises a supporting block arranged at the upper end of the bottom plate, a round through hole is formed in the middle of the supporting block, and a clamping assembly is arranged in the round through hole. Each clamping assembly comprises a circular ring rotationally arranged in a circular through hole formed in the middle of a supporting block, a special-shaped frame is arranged in the circular ring, two rotating wheels are slidably arranged on the two sides of the middle of the special-shaped frame correspondingly, two first supporting assemblies are arranged at the upper end of the bottom plate, and a welding head is arranged at the upper end between the two first supporting assemblies. The welding head is connected with the welding machine body through a wire harness, and the problems that when angle steel is welded, due to the fact that a welding seam on one side is just welded, the firmness of the angle steel is low, the welding seam may crack during overturning, and the angle steel may deform are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of special steel product processing, and specifically relates to a welding device for special steel products. Background Art

[0002] Special steel products refer to those steel products that have been specially designed and processed to meet the requirements of specific industries or applications. These products usually have specific performance characteristics and advantages, which enable them to be widely used in various industrial fields; the development of special steel products has continuously promoted the progress of industrial technology and the expansion of application fields, providing key material solutions for various industries and promoting the development and innovation of modern industries.

[0003] A patent application with the publication number CN119035891B discloses a multi-angle welding device for special steel products. By moving the processing and installation frame under the transferred sheet material, placing the bottom area of the sheet material on the support rod to support the sheet material, and the sheet material still being located between the clamping rods, the positioning plate is controlled to move by the positioning electric cylinder, and the positioning plate pushes the two ends of the sheet material to move the sheet material, thus completing the positioning adjustment; then, the position of the processing wheel 1 is controlled by the processing motor 1, and when the processing motor 1 works, the processing wheel 1 grinds the side surface of the sheet material to ensure smooth subsequent butt joint and welding quality.

[0004] In the above-mentioned prior art, when welding angle steel, two steel plates need to be welded at a 90-degree angle, and both sides of the splicing joint need to be welded. After welding one side of the weld, the angle steel needs to be flipped for welding on the other side. When welding a longer angle steel, since one side of the weld has just been welded, the firmness of the angle steel is relatively low at this time, and the weld may crack or the angle steel may deform during flipping.

[0005] Therefore, the present invention provides a welding device for special steel products. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A welding device for special steel products according to the present invention includes a bottom plate. A first support assembly is provided at the upper end of the bottom plate. The first support assembly includes a support block provided at the upper end of the bottom plate. A circular through hole is provided in the middle of the support block. A clamping assembly is provided in the circular through hole. The clamping assembly includes a ring rotatably provided in the circular through hole provided in the middle of the support block. An irregular-shaped frame is provided inside the ring. Two groups of rotating wheels are respectively slidably provided on both sides of the middle of the irregular-shaped frame. The two groups of rotating wheels are vertically arranged. Each group of rotating wheels includes two rotating wheels arranged in parallel. Two groups of first support assemblies are provided at the upper end of the bottom plate. A welding head is provided at the upper end between the two groups of first support assemblies. The welding head is connected to the main body of the welding machine through a wire harness.

[0008] Preferably, first rectangular holes are respectively formed in the irregular-shaped frame at positions corresponding to each rotating wheel. First cylindrical rods are respectively slidably provided in the inner parts of the first rectangular holes at the upper two sides. First U-shaped blocks are respectively fixedly connected to the mutually approaching ends of the two first cylindrical rods. The rotating wheels at the upper two sides are rotatably provided in the first U-shaped blocks. A rectangular strip is fixedly connected to the lower middle of the irregular-shaped frame. A first L-shaped block is fixedly connected to the upper end of the rectangular strip. The corner of the first L-shaped block is at a certain degree. Second U-shaped blocks are respectively fixedly connected to both ends of the first L-shaped block. The rotating wheels at the lower two sides are rotatably provided in the second U-shaped blocks.

[0009] Preferably, second cylindrical rods are slidably provided in the inner parts of the first rectangular holes at the lower two sides. Second L-shaped blocks are respectively fixedly connected to the mutually approaching ends of the two second cylindrical rods.

[0010] Preferably, irregular-shaped plates are respectively slidably provided on the upper and lower sides of the irregular-shaped frame. The irregular-shaped plates are respectively arranged parallel to the upper and lower sides of the irregular-shaped frame. The irregular-shaped frame at the upper end is fixedly connected to the first cylindrical rods on both sides. Second rectangular holes are respectively formed in the positions corresponding to the second cylindrical rods on both sides of the irregular-shaped plate at the lower end. The second cylindrical rods are slidably provided in the second rectangular holes. The ends of the second cylindrical rods slide on one side of the irregular-shaped plate through first rectangular blocks. Second rectangular blocks are respectively fixedly connected to one side of the first rectangular blocks through springs. The second rectangular blocks are fixedly connected to one side of the irregular-shaped plate.

[0011] Preferably, the two sides of the irregular-shaped frame are fixedly connected to the ring through fixing strips. Adjusting assemblies are respectively provided on the upper and lower sides of the irregular-shaped frame. The adjusting assemblies include third cylindrical rods respectively fixedly connected to the upper and lower sides of the irregular-shaped frame. The irregular-shaped plates are slidably provided on the outer sides of the third cylindrical rods. Lead screws are respectively threadedly connected to the middle parts of the irregular-shaped plates. The lead screws are respectively rotatably provided on one side of the irregular-shaped frame.

[0012] Preferably, a rectangular plate is fixedly connected to the upper end of the welding head. Telescopic plates are respectively and fixedly connected to both sides of the lower end of the rectangular plate. The telescopic plates are fixedly connected to the upper end of the bottom plate, and electric push rods are installed inside the telescopic plates.

[0013] Preferably, a support plate is arranged at the lower end of the welding head, and a support frame is arranged at the lower end of the support plate. The support frame is fixedly connected to the upper end of the bottom plate, and an electric telescopic rod is fixedly connected to the middle of the support frame. The output end of the electric telescopic rod is fixedly connected to the support plate.

[0014] Preferably, a second support assembly is slidably arranged on one side of the two first support assemblies. The second support assembly has the same structure as the first support assembly. A second sliding table is fixedly connected to the lower end of the second support assembly. A second electric slide rail is fixedly connected to the upper end of the bottom plate corresponding to the position of the second sliding table. The second support assembly is slidably arranged on the upper end of the second electric slide rail through the second sliding table.

[0015] Preferably, a push block is slidably arranged on one side of the upper end away from the second support assembly. A support rod is fixedly connected to one side of the push block, and a first sliding table is fixedly connected to the lower end of the support rod. A first electric slide rail is fixedly connected to the upper end of the bottom plate corresponding to the position of the first sliding table. The support rod is slidably arranged on the first electric slide rail through the first sliding table.

[0016] Preferably, the support blocks are all of hollow structures. Tooth rings are fixedly connected to the outer sides of the rings. Gears are meshed with the lower ends of the tooth rings. A cylinder is fixedly connected to the middle of the gear. A cylindrical bar is jointly arranged in the middle of several cylinders. A rectangular groove is formed on the side of the cylindrical bar. Several cylinders are slidably arranged inside the rectangular groove through bumps. One end of the cylindrical bar is fixedly connected to the output end of a motor. The motor is fixedly connected to the upper end of the bottom plate through a mounting seat. The end of the cylindrical bar away from the motor is rotatably arranged on the upper end of the bottom plate through a third rectangular block.

[0017] The beneficial effects of the present invention are as follows: 1. A welding device for special steel products according to the present invention places two steel plates in the middle of two special-shaped frames, drives two groups of rotating wheels to clamp the steel plates, so that the edges of the two steel plates are spliced together and in a vertical state. Subsequently, the welding head is driven to weld the upper side of the splicing part of the steel plates. After the upper side welding is completed, by driving the ring to rotate in the middle of the support block, the ring drives the special-shaped frame to rotate. The special-shaped frame drives the two steel plates clamped in the middle to rotate 180 degrees through the rotating wheels, so that the side where the upper side welding is completed rotates to the lower end, and the side where the lower end is not welded rotates to the upper end. Subsequently, the welding head is driven again for welding, and the two sides of the splicing part of the two steel plates can be welded. By driving the ring to drive the special-shaped frame to rotate 180 degrees in the middle of the support block and simultaneously drive the two steel plates to rotate 180 degrees, when the two steel plates are flipped, the rotating wheels always clamp the steel plates to prevent the two steel plates from deforming or separating during the flipping process, solving the problem that when welding angle steel, due to the weld on one side being just welded, the firmness of the angle steel is relatively low at this time, and cracking of the weld may occur during flipping, and the angle steel may also be deformed.

[0018] 2. A welding device for special steel products according to the present invention drives the screw rod to rotate, drives the special-shaped plate to move. The upper special-shaped plate drives the two rotating wheels at the upper end to move simultaneously through the first cylindrical rod, and the distance between the two rotating wheels at the upper end and the two rotating wheels at the lower end can be adjusted simultaneously, and steel plates of different thicknesses can be clamped. The lower special-shaped plate adjusts the position of the second L-shaped block through the second cylindrical rod, and can be used to clamp steel plates of different widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a three-dimensional view of Embodiment 1 of the present invention; Figure 2 is a schematic diagram of the position of the support block; Figure 3 is a sectional view of the support block; Figure 4 is a schematic diagram of the position of the special-shaped frame; Figure 5 is a schematic diagram of the position of the rotating wheel; Figure 6 is a schematic diagram of the position of the welding head; Figure 7 is a schematic diagram of the position of the cylindrical bar; Figure 8 is a structural diagram of the cylindrical bar; In the figure: 1. Support block; 11. Ring; 111. Tooth ring; 112. Gear; 12. Cylinder; 13. Cylindrical bar; 131. Rectangular groove; 132. Third rectangular block; 14. Motor; 2. Special-shaped frame; 21. First rectangular hole; 22. First cylindrical rod; 221. First U-shaped block; 23. Runner; 24. Rectangular bar; 241. First L-shaped block; 242. Second U-shaped block; 25. Second cylindrical rod; 251. Second L-shaped block; 252. First rectangular block; 253. Second rectangular block; 254. Spring; 26. Special-shaped plate; 261. Second rectangular hole; 27. Third cylindrical rod; 271. Lead screw; 28. Fixed bar; 3. Welding head; 31. Rectangular plate; 32. Telescopic plate; 4. Support plate; 41. Support frame; 42. Electric telescopic rod; 5. Pusher block; 51. Support rod; 52. First sliding table; 53. First electric slide rail; 6. Second sliding table; 61. Second electric slide rail; 7. Base plate. Detailed implementation mode

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0022] Example 1: As Figures 1-6 shown, a special steel product welding device described in an embodiment of the present invention includes a base plate 7. A first support assembly is provided at the upper end of the base plate 7. The first support assembly includes a support block 1 provided at the upper end of the base plate 7. A circular through hole is provided in the middle of the support block 1, and a clamping assembly is provided in the circular through hole. The clamping assembly includes a ring 11 rotatably provided in the circular through hole provided in the middle of the support block 1. A special-shaped frame 2 is provided inside the ring 11. Two groups of runners 23 are respectively slidably provided on both sides of the middle of the special-shaped frame 2. The two groups of runners 23 are vertically arranged. The runners 23 in the same group include two runners 23 arranged in parallel. Two groups of first support assemblies are provided at the upper end of the base plate 7. A welding head 3 is provided at the upper end between the two groups of first support assemblies. The welding head 3 is connected to the main body of the welding machine through a wire harness.

[0023] Specifically, when welding angle steel, two steel plates are welded together at a 90-degree angle, and both sides of the splicing joint are welded. When welding a longer angle steel, since the weld on one side has just been completed, the firmness of the angle steel is relatively low at this time. During flipping, the weld may crack, and the angle steel may also deform. When using this welding device, by placing the two steel plates in the middle of two special-shaped frames 2, driving two groups of rotating wheels 23 to clamp the steel plates, the edges of the two steel plates are spliced together, making the two steel plates in an inverted V shape and in a vertical state. Subsequently, drive the welding head 3 to weld the upper side of the steel plate splicing joint. After the upper side welding is completed, by driving the circular ring 11 to rotate in the middle of the support block 1, the circular ring 11 drives the special-shaped frame 2 to rotate. The special-shaped frame 2 drives the two steel plates clamped in the middle to rotate 180 degrees through the rotating wheels 23, so that the side where the upper side welding is completed rotates to the lower end, and the side where the lower end is not welded rotates to the upper end. Subsequently, drive the welding head 3 to weld again, and both sides of the splicing joint of the two steel plates can be welded. By driving the circular ring 11 to drive the special-shaped frame 2 to rotate 180 degrees in the middle of the support block 1, and at the same time driving the two steel plates to rotate 180 degrees, when flipping the two steel plates, the rotating wheels 23 always clamp the steel plates, preventing the two steel plates from deforming or separating during the flipping process, and solving the problem that when welding angle steel, since the weld on one side has just been completed, the firmness of the angle steel is relatively low at this time, and the weld may crack during flipping, and the angle steel may also deform.

[0024] As Figures 4-5 shown, the special-shaped frame 2 is respectively provided with first rectangular holes 21 at positions corresponding to each rotating wheel 23. First cylindrical rods 22 are respectively slidably arranged inside the first rectangular holes 21 on both sides of the upper end. The mutually approaching ends of the two first cylindrical rods 22 are respectively fixedly connected with first U-shaped blocks 221. The rotating wheels 23 on both sides of the upper end are rotatably arranged inside the first U-shaped blocks 221. A rectangular strip 24 is fixedly connected to the lower end of the middle part of the special-shaped frame 2. A first L-shaped block 241 is fixedly connected to the upper end of the rectangular strip 24. The corner of the first L-shaped block 241 is 90 degrees. The two ends of the first L-shaped block 241 are respectively fixedly connected with second U-shaped blocks 242. The rotating wheels 23 on both sides of the lower end are rotatably arranged inside the second U-shaped blocks 242.

[0025] Specifically, by driving the first cylindrical rods 22 on both sides of the upper end to slide in the first rectangular holes 21, the first cylindrical rods 22 drive the rotating wheels 23 on both sides of the upper end to move away from the rotating wheels 23 on both sides of the lower end, and the distance between two relatively parallel rotating wheels 23 is adjusted, which can be used to clamp steel plates of different thicknesses.

[0026] As Figure 5 shown, second cylindrical rods 25 are slidably arranged inside the first rectangular holes 21 on both sides of the lower end. The mutually approaching ends of the two second cylindrical rods 25 are respectively fixedly connected with second L-shaped blocks 251.

[0027] Specifically, the middle part of the steel plate is clamped by the rotating wheel 23, so that two steel plates are spliced together in a vertical state. Then, the second cylindrical rod 25 is driven to slide in the first rectangular hole 21, and the second L-shaped block 251 is driven to abut against one end of the two steel plates away from the splicing part, so that the splicing part of the two steel plates fits closely.

[0028] As Figure 4 As shown in the figure, special-shaped plates 26 are slidably arranged on the upper and lower sides of the special-shaped frame 2 respectively. The special-shaped plates 26 are respectively arranged parallel to the upper and lower sides of the special-shaped frame 2. The upper special-shaped frame 2 is fixedly connected to the two first cylindrical rods 22 on both sides. Second rectangular holes 261 are respectively formed at the positions corresponding to the second cylindrical rods 25 on both sides of the lower special-shaped plate 26. The second cylindrical rods 25 are slidably arranged in the second rectangular holes 261. The end of the second cylindrical rod 25 slides on one side of the special-shaped plate 26 through the first rectangular block 252. Second rectangular blocks 253 are fixedly connected to one side of the first rectangular block 252 through springs 254 respectively. The second rectangular blocks 253 are fixedly connected to one side of the special-shaped plate 26.

[0029] Specifically, by driving the upper special-shaped plate 2 to slide up and down, the upper special-shaped plate 2 drives the upper rotating wheel 23 to move through the first cylindrical rod 22, and the distance between the two upper rotating wheels 23 and the two lower rotating wheels 23 can be adjusted simultaneously, so that steel plates of different thicknesses can be clamped. By driving the lower special-shaped plate 2 to move up and down, the lower special-shaped plate 2 adjusts the position of the second L-shaped block 251 through the second cylindrical rod 25, which can be used to clamp steel plates of different widths.

[0030] As Figure 4 As shown in the figure, both sides of the special-shaped frame 2 are fixedly connected to the ring 11 through the fixing strip 28. Adjusting components are respectively arranged on the upper and lower sides of the special-shaped frame 2. The adjusting components include third cylindrical rods 27 fixedly connected to the upper and lower sides of the special-shaped frame 2 respectively. The special-shaped plates 26 are slidably arranged on the outer sides of the third cylindrical rods 27. The middle parts of the special-shaped plates 26 are respectively threadedly connected with lead screws 271. The lead screws 271 are respectively rotatably arranged on one side of the special-shaped frame 2.

[0031] Specifically, when it is necessary to adjust the distance between the upper and lower special-shaped plates 26 and the special-shaped frame 2, by driving the lead screws 271 to rotate, the special-shaped plates 26 are driven to move. The upper special-shaped plate 2 drives the two upper rotating wheels 23 to move simultaneously through the first cylindrical rod 22, and the distance between the two upper rotating wheels 23 and the two lower rotating wheels 23 can be adjusted simultaneously. The lower special-shaped plate 2 adjusts the position of the second L-shaped block 251 through the second cylindrical rod 25 simultaneously, which can be used to clamp steel plates of different widths.

[0032] As Figure 6As shown, a rectangular plate 31 is fixedly connected to the upper end of the welding head 3. On both sides of the lower end of the rectangular plate 31, telescopic plates 32 are fixedly connected respectively. The telescopic plates 32 are fixedly connected to the upper end of the bottom plate 7. An electric push rod is installed inside the telescopic plates 32.

[0033] Specifically, by driving the electric push rod inside the telescopic plate 32 to drive the telescopic plate 32 to contract, the telescopic plate 32 drives the welding head 3 to move downward through the rectangular plate 31, and then the angle steel spliced at the lower end can be welded.

[0034] As Figure 6 shown, a support plate 4 is arranged at the lower end of the welding head 3. A support frame 41 is arranged at the lower end of the support plate 4. The support frame 41 is fixedly connected to the upper end of the bottom plate 7. An electric telescopic rod 42 is fixedly connected to the middle of the support frame 41. The output end of the electric telescopic rod 42 is fixedly connected to the support plate 4.

[0035] Specifically, by driving the electric telescopic rod 42 to extend, the support plate 4 is driven to move upward, and the support plate 4 supports the two steel plates spliced at the lower end of the welding head 3.

[0036] As Figure 7 shown, a second support assembly is slidably arranged on one side of the two first support assemblies. The second support assembly has the same structure as the first support assembly. A second sliding table 6 is fixedly connected to the lower end of the second support assembly. A second electric slide rail 61 is fixedly connected to the upper end of the bottom plate 7 at a position corresponding to the second sliding table 6. The second support assembly is slidably arranged on the upper end of the second electric slide rail 61 through the second sliding table 6.

[0037] Specifically, when welding a longer angle steel, the welded angle steel is clamped by the runner 23 in the middle of the second support assembly to prevent the end of the longer angle steel from sagging downward under the action of gravity and deforming the angle steel. By driving the second sliding table 6 to drive the second support assembly to slide on the upper end of the second electric slide rail 61, the distance between the second support assembly and the first support assembly can be adjusted to be suitable for angle steels of different lengths.

[0038] As Figure 7 shown, a push block 5 is slidably arranged on one side of the upper end away from the second support assembly. A support rod 51 is fixedly connected to one side of the push block 5. A first sliding table 52 is fixedly connected to the lower end of the support rod 51. A first electric slide rail 53 is fixedly connected to the upper end of the bottom plate 7 at a position corresponding to the first sliding table 52. The support rod 51 is slidably arranged on the first electric slide rail 53 through the first sliding table 52.

[0039] Specifically, by clamping the angle steel between the runners 23 respectively, and then driving the first sliding table 52 to slide on the upper end of the first electric slide rail 53 towards the side close to the support assembly, the first sliding table 52 drives the push block 5 through the support rod 51. The push block 5 contacts the ends of the two steel plates, pushes the steel plates to move towards the second support assembly, and at the same time drives the runners 23 clamping the steel plates to rotate, pushing the steel plates to move under the welding head 3, so that the welding head 3 welds the welds of the steel plates.

[0040] Embodiment 2: As Figure 3 , Figure 8 shown, compared with Embodiment 1, another implementation manner of the present invention is: the support blocks 1 are all of hollow structures, tooth rings 111 are fixedly connected to the outer sides of the rings 11, a gear 112 is meshed with the lower end of the tooth ring 111, a cylinder 12 is fixedly connected to the middle of the gear 112, a cylindrical bar 13 is jointly arranged in the middles of a plurality of the cylinders 12, a rectangular groove 131 is formed in the side of the cylindrical bar 13, a plurality of the cylinders 12 are slidably arranged inside the rectangular groove 131 through bumps, one end of the cylindrical bar 13 is fixedly connected to the output end of a motor 14, the motor 14 is fixedly connected to the upper end of the bottom plate 7 through a mounting seat, and the end of the cylindrical bar 13 far away from the motor 14 is rotatably arranged on the upper end of the bottom plate 7 through a third rectangular block 132.

[0041] Specifically, by starting the motor 14, the motor 14 drives the cylindrical bar 13 to rotate, the cylindrical bar 13 drives each gear 112 to rotate simultaneously through each gear 112, the gear 112 drives the tooth ring 111 to rotate, and the tooth ring 111 drives the special-shaped frame 2 in the middle to rotate through the ring 11, and the special-shaped frame 2 drives the runners 23 clamping the spliced angle steel in the middle to turn over, so that the two sides of the splicing part of the two steel plates can be welded.

[0042] Working principle: Place the two steel plates in the middles of the two special-shaped frames 2. By driving the special-shaped plate 26 at the upper end to slide up and down, the special-shaped plate 26 drives the runners 23 at the upper end to move through the first cylindrical rod 22, and the distance between the two runners 23 at the upper end and the two runners 23 at the lower end can be adjusted simultaneously, and steel plates with different thicknesses can be clamped. By driving the special-shaped plate 26 at the lower end to move up and down, the special-shaped plate 26 adjusts the position of the second L-shaped block 251 through the second cylindrical rod 25, and it can be used to clamp steel plates with different widths. Until the two groups of runners 23 are driven to clamp the steel plates, then drive the electric push rod in the telescopic plate 32 to drive the telescopic plate 32 to contract. The telescopic plate 32 drives the welding head 3 to move downwards through the rectangular plate 31. Then drive the first sliding table 52 to slide on the upper end of the first electric slide rail 53 towards the side close to the support assembly. The first sliding table 52 drives the push block 5 through the support rod 51. The push block 5 contacts the ends of the two steel plates, pushes the steel plates to move towards the second support assembly, and at the same time drives the runners 23 clamping the steel plates to rotate, pushing the steel plates to move under the welding head 3, so that the welding head 3 welds the welds of the steel plates; After the upper-side welding is completed, start the motor 14. The motor 14 drives the cylindrical bar 13 to rotate. The cylindrical bar 13 drives each gear 112 to rotate simultaneously through the respective gears 112. The gear 112 drives the gear ring 111 to rotate. The gear ring 111 drives the special-shaped frame 2 in the middle to rotate through the ring 11. The special-shaped frame 2 drives the runner 23 in the middle to clamp and flip the spliced angle steel, and the two sides of the splicing joint of the two steel plates can be welded.

[0043] The foregoing has shown and described 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 the descriptions in the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for special steel products, including a bottom plate (7). There is a first support assembly at the upper end of the bottom plate (7). The first support assembly includes a support block (1) provided at the upper end of the bottom plate (7). A circular through-hole is provided in the middle of the support block (1), and a clamping assembly is arranged in the circular through-hole. It is characterized in that: The clamping assembly includes a ring (11) rotatably arranged in a circular through hole provided in the middle of a support block (1). An irregular-shaped frame (2) is arranged inside the ring (11). Two groups of rotating wheels (23) are respectively and slidably arranged on both sides of the middle of the irregular-shaped frame (2). The two groups of rotating wheels (23) are vertically arranged. Each group of rotating wheels (23) includes two rotating wheels (23) arranged in parallel. Two groups of first support assemblies are arranged at the upper end of the bottom plate (7). A welding head (3) is arranged at the upper end between the two groups of first support assemblies. The welding head (3) is connected to the main body of the welding machine through a wire harness.

2. The welding device for special steel products according to claim 1, wherein: The irregular-shaped frame (2) is respectively provided with first rectangular holes (21) at positions corresponding to each rotating wheel (23). First cylindrical rods (22) are respectively and slidably arranged inside the first rectangular holes (21) at both upper ends. One ends of the two first cylindrical rods (22) close to each other are respectively fixedly connected with first U-shaped blocks (221). The rotating wheels (23) at both upper ends are rotatably arranged inside the first U-shaped blocks (221). A rectangular strip (24) is fixedly connected to the lower end of the middle of the irregular-shaped frame (2). A first L-shaped block (241) is fixedly connected to the upper end of the rectangular strip (24). The corner of the first L-shaped block (241) is 90 degrees. Both ends of the first L-shaped block (241) are respectively fixedly connected with second U-shaped blocks (242). The rotating wheels (23) at both lower ends are rotatably arranged inside the second U-shaped blocks (242).

3. The welding device for special steel products according to claim 2, characterized in that: Second cylindrical rods (25) are slidably arranged inside the first rectangular holes (21) at both lower ends. One ends of the two second cylindrical rods (25) close to each other are respectively fixedly connected with second L-shaped blocks (251).

4. A special steel product welding device according to claim 3, characterized in that: Irregular-shaped plates (26) are respectively and slidably arranged on the upper and lower sides of the irregular-shaped frame (2). The irregular-shaped plates (26) are respectively arranged parallel to the upper and lower sides of the irregular-shaped frame (2). The irregular-shaped frame (2) at the upper end is fixedly connected with the two first cylindrical rods (22). Second rectangular holes (261) are respectively arranged at positions corresponding to the second cylindrical rods (25) on both sides of the irregular-shaped plate (26) at the lower end. The second cylindrical rods (25) are slidably arranged inside the second rectangular holes (261). The ends of the second cylindrical rods (25) slide on one side of the irregular-shaped plate (26) through first rectangular blocks (252). One side of each first rectangular block (252) is respectively fixedly connected with a second rectangular block (253) through a spring (254). The second rectangular blocks (253) are fixedly connected to one side of the irregular-shaped plate (26).

5. The welding device for special steel products according to claim 4, characterized in that: Both sides of the irregular-shaped frame (2) are fixedly connected with the ring (11) through fixing strips (28). Adjusting assemblies are respectively arranged on the upper and lower sides of the irregular-shaped frame (2). The adjusting assemblies include third cylindrical rods (27) respectively and fixedly connected to the upper and lower sides of the irregular-shaped frame (2). The irregular-shaped plates (26) are slidably arranged outside the third cylindrical rods (27). Lead screws (271) are respectively threadedly connected to the middle parts of the irregular-shaped plates (26). The lead screws (271) are respectively rotatably arranged on one side of the irregular-shaped frame (2).

6. The welding device for special steel products according to claim 1, characterized in that: A rectangular plate (31) is fixedly connected to the upper end of the welding head (3). Telescopic plates (32) are respectively and fixedly connected to both sides of the lower end of the rectangular plate (31). The telescopic plates (32) are fixedly connected to the upper end of the bottom plate (7). An electric push rod is installed inside the telescopic plates (32).

7. A welding device for special steel products according to claim 1, characterized in that: A support plate (4) is arranged at the lower end of the welding head (3). A support frame (41) is arranged at the lower end of the support plate (4). The support frame (41) is fixedly connected to the upper end of the bottom plate (7). An electric telescopic rod (42) is fixedly connected to the middle of the support frame (41). The output end of the electric telescopic rod (42) is fixedly connected to the support plate (4).

8. The welding device for special steel products according to claim 1, characterized in that: A second support assembly is slidably arranged on one side of the two first support assemblies. The second support assembly has the same structure as the first support assembly. A second sliding table (6) is fixedly connected to the lower end of the second support assembly. A second electric slide rail (61) is fixedly connected to the upper end of the bottom plate (7) at a position corresponding to the second sliding table (6). The second support assembly is slidably arranged on the upper end of the second electric slide rail (61) through the second sliding table (6).

9. A welding device for special steel products according to claim 1, characterized in that: A push block (5) is slidably arranged on one side of the upper end away from the second support assembly. A support rod (51) is fixedly connected to one side of the push block (5). A first sliding table (52) is fixedly connected to the lower end of the support rod (51). A first electric slide rail (53) is fixedly connected to the upper end of the bottom plate (7) at a position corresponding to the first sliding table (52). The support rod (51) is slidably arranged on the first electric slide rail (53) through the first sliding table (52).

10. A welding device for special steel products according to claim 1, characterized in that: The support blocks (1) are all of hollow structure. Tooth rings (111) are fixedly connected to the outer sides of the rings (11). Gears (112) are engaged with the lower ends of the tooth rings (111). A cylinder (12) is fixedly connected to the middle of the gears (112). A cylindrical bar (13) is jointly arranged in the middles of a plurality of the cylinders (12). A rectangular groove (131) is formed in the side of the cylindrical bar (13). A plurality of the cylinders (12) are slidably arranged inside the rectangular groove (131) through bumps. One end of the cylindrical bar (13) is fixedly connected to the output end of a motor (14). The motor (14) is fixedly connected to the upper end of the bottom plate (7) through a mounting seat. The end of the cylindrical bar (13) away from the motor (14) is rotatably arranged on the upper end of the bottom plate (7) through a third rectangular block (132).

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