Bridge steel formwork laser cutting equipment

Abstract

The invention belongs to the technical field of bridge steel formwork laser cutting, and particularly relates to bridge steel formwork laser cutting equipment which comprises a placing mechanism and a bridge cylindrical steel structure, the placing mechanism is placed on the ground, and the interior of the placing mechanism is used for conveying and placing the bridge cylindrical steel structure; two sets of built-in clamping mechanisms are connected to the two sides of the interior of the left end of the placing mechanism, the built-in clamping mechanisms are used for clamping and fixing the two ends of the interior of the bridge cylindrical steel structure, and an external clamping mechanism is installed on the outer side of the left end of the placing mechanism and used for clamping and lifting the bridge cylindrical steel structure; synchronous laser cutting of the inner wall and the outer wall of the same circumferential position of the bridge cylindrical steel structure can be achieved, dislocation deviation of notches is reduced, the thermal deformation amount is reduced, and the defects of notch dislocation, thermal stress accumulation and serious deformation caused by single-side machining and step-by-step machining in the prior art are overcome.

Description

TECHNICAL FIELD

[0001] The application relates to the field of bridge steel formwork laser cutting technology, in particular to a bridge steel formwork laser cutting equipment. BACKGROUND

[0002] The bridge steel formwork, as the core tooling for bridge construction, directly determines the forming precision, construction efficiency and durability of the bridge structure. The cylindrical steel formwork is widely used in key parts such as bridge piers, columns and box girder supports. The machining precision (such as cutout alignment, surface roughness and cylindricity) of the inner and outer walls directly affects the compactness of concrete pouring, the appearance quality and the stability of subsequent structure assembly.

[0003] With the development of bridge engineering towards large span and high precision, the machining requirements for cylindrical steel formwork are increasingly stringent: it needs to meet the technical standards of cutout misalignment deviation ≤0.5mm, surface roughness Ra≤25μm and cylindricity error ≤0.3mm, and needs to adapt to the machining requirements of high-strength steel materials with different diameters and thicknesses. However, the existing bridge steel formwork laser cutting technology still has many defects that are difficult to overcome, which seriously restricts the processing quality and efficiency: The inner and outer walls are not machined synchronously, and the cutout misalignment and deformation are serious. The existing laser cutting equipment adopts "single-sided machining" or "step-by-step machining" mode: either only single-sided (inner or outer wall) cutting can be realized, and the other side wall needs to be machined by manually turning over the workpiece or positioning again; or although both inner and outer walls can be machined, there is a lack of precise centering design, and the cutting is not synchronous and coaxial. This leads to the cutout misalignment deviation of the inner and outer walls at the same circumferential position generally ≥0.5mm, which cannot meet the sealing requirements of formwork splicing, and concrete pouring is prone to leakage problems; at the same time, the accumulation of one-way thermal stress caused by single-sided machining will cause large thermal deformation of the cylindrical steel structure, which needs to be corrected through complex processes such as flame shaping, which not only increases the working hours, but also reduces the tensile strength of the steel material by 10-15%, affecting the service life of the formwork.

[0004] The heating and polishing processes are separated, and the cutting quality is difficult to guarantee. In the existing technology, heating pretreatment, surface polishing and laser cutting are independent processes: heating is only performed on a single side, which leads to a temperature difference of ≥15℃ between the inner and outer walls, a significant difference in laser absorption rate, and easy "cutting not through, slag accumulation" when cutting thick plates; and the polishing process is usually performed after cutting, and the oxidation scale, rust and small protrusions on the surface of the workpiece before cutting are not removed in time, which will cause laser focusing deviation, and the cutout roughness Ra≥30μm, which needs to be manually polished for an additional 30-40% of the working hours, which not only is low in efficiency, but also is prone to cutout damage due to manual operation. In addition, during step-by-step machining, the cutout of the first machined side wall is prone to secondary oxidation, further deteriorating the splicing precision.

[0005] Poor clamping and positioning adaptability and insufficient processing stability: Existing clamping mechanisms are mostly single external clamping or simple internal support: external clamping is prone to radial deformation due to the weight of the cylindrical structure, while internal support is difficult to adapt to cylindrical templates of different diameters. When changing specifications, clamping components need to be replaced, and the adjustment time is ≥30 minutes; moreover, there is a lack of real-time following support structure during processing, and the cylindrical template is prone to shaking due to cutting vibration, resulting in a "sawtooth" cut and a straightness error ≥0.08mm / m, which seriously affects the template assembly accuracy.

[0006] The equipment is scattered and the production process is complicated. Traditional processing requires multiple machines to work together: heating equipment, laser cutting equipment, and grinding equipment are set up separately. Workpieces need to be manually transferred between processes, which is not only time-consuming and labor-intensive, but also reduces the processing accuracy due to the accumulation of positioning deviations during the transfer process. At the same time, the parameter adjustment of each machine is independent of each other, requiring professional technicians to adjust them one by one according to the workpiece specifications. The operation threshold is high, and improper parameter matching can easily lead to a scrap rate as high as 8-10%, which significantly increases the production cost.

[0007] Therefore, we propose a laser cutting device for bridge steel formwork. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A laser cutting device for bridge steel formwork includes: a placement mechanism and a bridge cylindrical steel structure. The placement mechanism is placed on the ground, and the interior of the placement mechanism is used for transporting and placing the bridge cylindrical steel structure. The left end of the placement mechanism has two internal clamping mechanisms connected to its inner sides. These internal clamping mechanisms are configured in two sets to clamp and fix the inner ends of the bridge cylindrical steel structure. An external clamping mechanism is installed on the outer side of the left end of the placement mechanism to clamp and lift the bridge cylindrical steel structure. The right end of the placement mechanism is connected to a rotating mechanism to drive the internal and external cutting mechanisms. The rotating mechanism has a rotatable connection to the internal center of the internal cutting mechanism, which is inserted into the bridge cylindrical steel structure to heat, cut, and grind the inner wall of the structure. The left end of the rotating mechanism is connected to an external cutting mechanism, which is positioned around the outer perimeter of the internal cutting mechanism to heat, cut, and grind the outer wall of the bridge cylindrical steel structure. Through the cooperation of the internal and external cutting mechanisms, both the inner and outer walls of the bridge cylindrical steel structure can be operated simultaneously.

[0009] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the placement mechanism includes: a placement platform; A placement platform is placed on the ground. The inner wall of the placement platform is arc-shaped. A transmission roller is located at the middle of the lower end of the placement platform. The left side of the inner wall of the placement platform has first limiting grooves on both sides. An internal clamping mechanism is slidably connected inside the first limiting groove. The upper sides of both ends of the inner wall of the placement platform have second limiting grooves. An external clamping mechanism is slidably connected inside the second limiting groove. The lower ends of the right side of the placement platform are equipped with a first motor. The output end of the first motor is connected to the right port of a first bidirectional screw. The first bidirectional screw is rotatably connected inside the first limiting groove. An internal clamping mechanism is connected to the outer wall of the first bidirectional screw. The upper ends of the right side of the placement platform are equipped with a second motor. The first screw is rotatably connected inside the second limiting groove. The right port of the first screw is connected to the second motor. A rotating mechanism is connected to the outer wall of the first screw.

[0010] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the built-in clamping mechanism includes a support component; The bottom of the support component is slidably connected to the inside of the first limiting groove in the placement mechanism. The bottom of the support component is threadedly connected to the outer wall of the first bidirectional screw in the placement mechanism. The inner end of the support component is connected to the first limiting component. The inner end of the first limiting component is rotatably connected to the second limiting component. The inside of the second limiting component is slidably connected to the first extension component.

[0011] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the supporting component includes: a first slider; The first slider is slidably connected inside the first limiting groove. The inside of the first slider is threadedly connected to the outer wall of the first bidirectional screw. The upper end of the first slider is provided with a first support rod. The inner end of the first support rod is provided with a threaded post. The threaded post and the first limiting component can be detachably installed. The first limiting component includes: a first limiting ring; The inner end of the first limiting ring is provided with a first rotating groove, and the second limiting component is rotatably connected inside the first rotating groove. Mounting blocks are provided on both sides of the lower end of the inner wall of the first limiting ring, and the mounting blocks are provided with threads inside. A third motor is installed on the upper end of the right side of the first limiting ring, and the output end of the third motor is connected to a first gear. The second limiting component includes: a first limiting frame; The first limiting frame has a first extension component slidably connected inside. The outer wall of the first limiting frame is provided with a mounting ring. The right end of the mounting ring is provided with a first rotating ring. The first rotating ring is rotatably connected inside the first rotating groove. The inner wall of the mounting ring is provided with internal teeth around its perimeter. The internal teeth mesh with the outer wall of the first gear. The two ends of the outer wall of the first limiting frame are provided with first telescopic rods. The output end of the first telescopic rod is connected to the right end of the first extension component. The first extended component includes: an active ring; The movable ring is slidably connected to the inner center of the first limiting frame. The two ends of the right side of the movable ring are connected to the output end of the first telescopic rod. The left side of the outer wall of the movable ring is rotatably connected to the first connecting rod. The other end of the first connecting rod is rotatably connected to one end of the inner wall of the L-shaped rod. The right end of the L-shaped rod is slidably connected to the inside of the sliding groove around the left side of the first limiting frame. The top of the L-shaped rod is connected to the inner clamping block.

[0012] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the external clamping mechanism includes: a spacing adjustment component; The spacing adjustment components are installed on both sides of the left end of the outer wall of the placement platform in the placement mechanism, and the outer wall of the spacing adjustment components is connected to the outer clamping components. The spacing adjustment component includes: a first movable column; The first movable column is installed on both sides of the left end of the outer wall of the placement platform. The middle of the outer wall of the first movable column is provided with a drive groove. The top and bottom of the first movable column are provided with a first guide groove. A fourth motor is installed on one side port of the first movable column. A second bidirectional screw is rotatably connected inside the drive groove. One end of the second bidirectional screw is connected to the output end of the fourth motor. The external clamping assembly includes: a U-shaped block; The inner wall of the U-shaped block has a second slider in the middle, which is slidably connected to the inside of the drive groove. The inside of the second slider is threadedly connected to the outer wall of the second bidirectional screw. The upper and lower ends of the inner wall of the U-shaped block have third sliders, which are slidably connected to the inside of the first guide groove. The top two ends of the U-shaped block are equipped with second telescopic rods, the output ends of which are connected to the front and rear ends of the bottom of the second moving column. The bottom left and right ends of the second moving column are equipped with second guide box grooves. The top rear end of the second moving column is equipped with a fifth motor. The bottom middle of the second moving column is rotatably connected to a third bidirectional screw. The rear end of the third bidirectional screw is connected to the output end of the fifth motor through a steering gear set. The outer wall of the third bidirectional screw is threadedly connected to the top middle of the outer clamping block. The outer clamping block is set in two sets, which are connected to the two ends of the third bidirectional screw. The top two ends of the outer clamping block are slidably connected to the inside of the second guide box groove.

[0013] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the rotating mechanism includes: a fourth slider; The fourth slider is slidably connected inside the second limiting groove in the placement mechanism. The interior of the fourth slider is threadedly connected to the outer wall of the first screw in the placement mechanism. The other end of the fourth slider is provided with a second support rod. The second support rod is set at both ends of the outer wall of the second limiting ring. The inner end of the second limiting ring is provided with a second rotating groove. The inner wall of the second limiting ring is provided with a second limiting frame. The interior of the second limiting frame is rotatably connected to the built-in cutting mechanism. The outer end of the second limiting frame is equipped with a sixth motor. The output end of the sixth motor is connected to a second gear. One end of the second gear meshes with a fixed gear. The fixed gear is fixedly installed on the right end of the outer wall of the built-in cutting mechanism.

[0014] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the built-in cutting mechanism includes: a first mounting component; The right end of the outer wall of the first mounting component is rotatably connected to the inner center of the second limiting frame in the rotating mechanism. The left end of the outer wall of the first mounting component is equipped with a second extension mechanism. The front end of the second extension mechanism is equipped with a first heating component. The upper end of the second extension mechanism is equipped with a first laser cutting component. The rear end of the second extension mechanism is equipped with a first grinding component. The lower end of the second extension mechanism is equipped with a second grinding component.

[0015] In a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the first installation component includes: an installation column; The right end of the outer wall of the mounting column is rotatably connected to the inner center of the second limiting frame, and the left end of the outer wall of the mounting column is provided with a second guide groove around its perimeter. The second extension mechanism includes: a seventh motor; The seventh motor is installed at the right port of the mounting column. The output end of the seventh motor is connected to a rotating shaft, which is rotatably connected inside the mounting column. Several sets of second screws are connected to the outer wall of the rotating shaft through a sprocket and chain drive. The second screws are rotatably connected to the second guide groove. The outer wall of the second screw is threadedly connected to the inside of the fifth slider. The fifth slider is slidably connected inside the second guide groove. The top of the fifth slider is rotatably connected to the right port of the first movable rod. The left end of the first movable rod is rotatably connected to the lower side of the second movable rod. The bottom of the second movable rod is rotatably connected to the outer wall of the mounting column. A bracket is installed on the top of the second movable rod. The second polishing assembly includes: a bearing; The bearing is installed inside the lower bracket, and the third telescopic rod is installed inside the bearing. The output end of the third telescopic rod is connected to the grinding disc. The eighth motor is installed on the left end of the bracket, and the output end of the eighth motor is connected to the lower end of the outer wall of the third telescopic rod through a sprocket and a chain.

[0016] As a preferred embodiment of the laser cutting equipment for bridge steel formwork described in this invention, the external cutting mechanism includes: a third limiting component; The right end of the third limiting component is rotatably connected to the inside of the second rotating groove in the rotating mechanism. The third limiting component is equipped with a third extension component around its interior, and the third extension component is equipped with an installation and auxiliary component around its outer wall. The installation and auxiliary component is set to four sets.

[0017] As a preferred embodiment of the laser cutting equipment for bridge steel formwork according to the present invention, the third limiting component includes: a third limiting ring; The right end surface of the third limiting ring is equipped with a third support rod, the right end of the third support rod is slidably connected to the inside of the second rotating groove, the left end surface of the third limiting ring is provided with a third guide groove, the outer wall of the third limiting ring is equipped with an arc-shaped outer frame, the inner wall of the arc-shaped outer frame is equipped with a fourth limiting ring, the inner wall of the fourth limiting ring is equipped with a third rotating groove, and the inside of the third rotating groove is rotatably connected to an internal toothed ring. The third extension component includes: a shaft; The shaft is rotatably connected to the third and fourth limiting rings via a bearing seat. There are four sets of shafts. A third gear is installed on the left end of the outer wall of the shaft. The outer wall of the third gear meshes with the inner wall of the inner gear ring. A fourth gear is installed on the right end of the outer wall of the shaft. The right end of one set of shafts is connected to the ninth motor. The ninth motor is installed on the upper end of the right end surface of the third limiting ring. An extension rod is provided between the two sets of arc-shaped outer frames. An installation and auxiliary component is installed on the outer port of the extension rod. There are four sets of extension rods. A sixth slider is installed on the right end of the extension rod. The sixth slider is slidably connected inside the third guide groove. A tooth is provided on the side end of the extension rod. The tooth meshes with the outer wall of the fourth gear. The installation and auxiliary components include: a support rod; The bottom right end of the support rod is installed on the top of the extension rod, and the bottom left end of the support rod is equipped with an installation plate. A crossbar is provided in the middle of the left end of the support rod. The second connecting rod is rotatably connected to the middle inner side of the installation plate. The right end of the second connecting rod is rotatably connected to the auxiliary arc plate. The top right end of the second connecting rod is rotatably connected to the right end of the fourth telescopic rod. The left end of the fourth telescopic rod is rotatably connected to the middle right end of the crossbar. A spring is provided on the outer wall of the fourth telescopic rod.

[0018] Compared with existing technologies: This invention achieves synchronous laser cutting of the inner and outer walls of the same circumference position of a bridge cylindrical steel structure by precisely placing the first laser cutting component with the built-in cutting mechanism and the second laser cutting component with the external cutting mechanism, and driving the workpiece to rotate at a uniform speed and moving the cutting mechanism axially synchronously. This reduces the misalignment deviation of the cut and the amount of thermal deformation, and solves the defects of the existing technology of single-sided processing and step-by-step processing, which are caused by cut misalignment, thermal stress accumulation and severe deformation. This invention arranges the first heating component and the second heating component, the first grinding component and the third grinding component, and the second grinding component and the fourth grinding component in a relative manner, forming an integrated link with the laser cutting component for synchronous preheating, synchronous rough grinding, synchronous cutting, and synchronous fine grinding. This makes the temperature difference between the inner and outer walls relatively consistent, improves the laser absorption rate, reduces the slag height, and reduces the roughness of the cut. It solves the defects of the prior art, such as uneven temperature, low laser absorption rate, serious slag, and complicated post-processing caused by single-sided heating and grinding after cutting. This invention achieves rapid adaptation of bridge cylindrical steel structures of different diameters through dual collaborative positioning of built-in and external clamping mechanisms, combined with the real-time follow support of the auxiliary arc plate of the external cutting mechanism. This reduces processing coaxiality error and vibration amplitude, and solves the problems of existing equipment that rely on manual calibration for positioning, poor adaptability, and sawtooth defects in the cut caused by processing vibration. This invention integrates a placement mechanism, a clamping mechanism, a rotating mechanism, a built-in clamping mechanism, and an external clamping mechanism. With the coordinated action of each component and automatic parameter matching, it enables one-time clamping and fully automated processing of bridge cylindrical steel structures, shortening the production cycle, reducing the scrap rate, and solving the shortcomings of existing technologies such as multiple equipment being scattered, manual transfer between processes, and reliance on professional personnel for operation. Attached Figure Description

[0019] Figure 1 The overall structural diagram provided for this invention Figure One ; Figure 2 The overall structural diagram provided for this invention Figure Two ; Figure 3 Schematic diagram of the placement mechanism provided by the present invention Figure One ; Figure 4 Schematic diagram of the placement mechanism provided by the present invention Figure Two ; Figure 5 A schematic diagram showing the disassembled structure of the bridge cylindrical steel structure and the built-in clamping mechanism provided by the present invention; Figure 6 Schematic diagram of the built-in clamping mechanism provided by the present invention Figure One ; Figure 7 Schematic diagram of the built-in clamping mechanism provided by the present invention Figure Two ; Figure 8 This is a schematic diagram of the disassembled structure of the built-in clamping mechanism provided by the present invention; Figure 9 This is a schematic diagram of the support component and the first limiting component provided by the present invention; Figure 10A schematic diagram of the first limiting component structure provided by the present invention; Figure 11 This is a schematic diagram of the structure of the second limiting component provided by the present invention; Figure 12 A schematic diagram of the first extended component structure provided by the present invention; Figure 13 This is a schematic diagram of the external clamping mechanism provided by the present invention; Figure 14 This is a schematic diagram of the external clamping component structure provided by the present invention; Figure 15 Schematic diagram of the connection structure of the rotating mechanism, the built-in cutting mechanism and the external cutting mechanism provided by the present invention Figure One ; Figure 16 Schematic diagram of the connection structure of the rotating mechanism, the built-in cutting mechanism and the external cutting mechanism provided by the present invention Figure Two ; Figure 17 This is a schematic diagram of the rotating mechanism structure provided by the present invention; Figure 18 This is a schematic diagram of the built-in cutting mechanism provided by the present invention; Figure 19 This is a schematic diagram of the first mounting component structure provided by the present invention; Figure 20 Schematic diagram of the second extended mechanism structure provided by the present invention Figure One ; Figure 21 Schematic diagram of the second extended mechanism structure provided by the present invention Figure Two ; Figure 22 Schematic diagram of the second extended mechanism structure provided by the present invention Figure Three ; Figure 23 This is a schematic diagram of the structure of the second polishing component provided by the present invention; Figure 24 This is a schematic diagram of the external cutting mechanism provided by the present invention; Figure 25 Schematic diagram of the disassembled structure of the third limiting component provided by the present invention Figure One ; Figure 26 Schematic diagram of the disassembled structure of the third limiting component provided by the present invention Figure Two ; Figure 27 Schematic diagram of the disassembled structure of the third limiting component provided by the present invention Figure Three ; Figure 28 A schematic diagram of the connection structure of the third extension component provided by the present invention; Figure 29This is a schematic diagram of the installation and auxiliary component connection structure provided by the present invention; Figure 30 A schematic diagram of the installation and auxiliary components provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0021] This invention provides a laser cutting device for bridge steel formwork. Please refer to [link / reference]. Figures 1-30 It includes a placement mechanism 1, a bridge cylindrical steel structure 2, an internal clamping mechanism 3, an external clamping mechanism 4, a rotating mechanism 5, an internal cutting mechanism 6, and an external cutting mechanism 7. The placement mechanism 1 is placed on the ground. Its interior is used for transporting and placing the bridge cylindrical steel structure 2. The placement mechanism 1 includes: a placement platform 11, a transmission roller 12, a first limiting groove 13, a second limiting groove 14, a first motor 15, a first bidirectional screw 16, a second motor 17, and a first screw 18. The placement platform 11 is placed on the ground, and its inner wall is arc-shaped to facilitate the placement of the bridge cylindrical steel structure 2. A transmission roller 12 is located at the lower center of the interior of the placement platform 11. The transmission roller 12... 2. The platform 11 is capable of transporting and moving the cylindrical steel structure 2 of the bridge. The left side of the inner wall of the platform 11 has first limiting grooves 13 on both sides. An internal clamping mechanism 3 is slidably connected inside the first limiting groove 13, limiting and guiding the movement of the internal clamping mechanism 3. The upper sides of both ends of the inner wall of the platform 11 have second limiting grooves 14, with external clamping mechanisms 4 slidably connected inside the second limiting grooves 14, limiting and guiding the movement of the rotating mechanism 5. The right side of the platform 11... A first motor 15 is installed at both ends of the lower side of the end face. The output end of the first motor 15 is connected to the right port of the first bidirectional screw 16. The first bidirectional screw 16 is rotatably connected inside the first limiting groove 13. The outer wall of the first bidirectional screw 16 is connected to the built-in clamping mechanism 3. Driven by the first motor 15, the first bidirectional screw 16 can be rotated. Through the rotation of the first bidirectional screw 16 and the limiting of the first limiting groove 13, the two sets of built-in clamping mechanisms 3 can be moved away from and closer to each other, thus clamping the bridge cylindrical steel structure 2. The platform 11 is fixed in place. The upper two ends of the right side are equipped with a second motor 17. The first screw 18 is rotatably connected inside the second limiting groove 14. The right end of the first screw 18 is connected to the second motor 17. The outer wall of the first screw 18 is connected to a rotating mechanism 5. Driven by the second motor 17, the first screw 18 can be rotated. Through the rotation of the first screw 18 and the limiting of the second limiting groove 14, the rotating mechanism 5 can be moved, thereby moving the rotating mechanism 5 to the cutting area of ​​the bridge cylindrical steel structure 2. The built-in clamping mechanism 3 is connected to both sides of the left end of the placement mechanism 1. Two sets of built-in clamping mechanisms 3 are configured to clamp and fix the internal ends of the bridge cylindrical steel structure 2. Simultaneously, the built-in clamping mechanism 3 also supports the bridge cylindrical steel structure 2, facilitating its rotational drive. The built-in clamping mechanism 3 includes: a support assembly 31, a first slider 311, a first support rod 312, a threaded column 313, a first limiting assembly 32, a first limiting ring 321, a first rotating groove 322, a mounting block 323, a third motor 324, a first gear 325, a second limiting assembly 33, a first limiting frame 331, a mounting ring 332, a first rotating ring 333, and internal teeth 334. The first telescopic rod 335, the first extension component 34, the movable ring 341, the first connecting rod 342, the L-shaped rod 343, and the inner clamping block 344; the bottom of the support component 31 is slidably connected to the inside of the first limiting groove 13 in the placement mechanism 1, and the bottom of the support component 31 is threadedly connected to the outer wall of the first bidirectional screw 16 in the placement mechanism 1. The rotation of the first bidirectional screw 16 can drive the support component 31 to move. The first slider 311 is slidably connected to the inside of the first limiting groove 13, and the inside of the first slider 311 is threadedly connected to the outer wall of the first bidirectional screw 16. The rotation of the first bidirectional screw 16 and the limiting of the first slider 311 can drive the first slider 311 to move. Since the support component 31 is set in two sets, the support... The support assembly 31 is connected to both ends of the first bidirectional screw 16. Rotation of the first bidirectional screw 16 causes the two sets of support assemblies 31 to move closer or further apart. The upper end of the first slider 311 is provided with a first support rod 312. The inner end of the first support rod 312 is provided with a threaded post 313. The threaded post 313 is detachably installed with the first limiting assembly 32. The inner end of the support assembly 31 is connected to the first limiting assembly 32. The first limiting assembly 32 can rotate and limit the second limiting assembly 33. Simultaneously, the drive of the first limiting assembly 32 can drive the second limiting assembly 33 and the first extension assembly 34 to rotate, thereby causing the first extension assembly 34 to rotate the bridge cylindrical steel structure 2 that is internally clamped, thus facilitating the cutting process. The positions are reversed. The inner end of the first limiting ring 321 is provided with a first rotating groove 322. The second limiting component 33 is rotatably connected inside the first rotating groove 322. Through the limiting of the first rotating groove 322, the rotation of the second limiting component 33 can be limited and guided. The lower end of the inner wall of the first limiting ring 321 is provided with mounting blocks 323 on both sides. The mounting blocks 323 are threaded inside. The mounting blocks 323 are threaded to the threaded post 313, so that the first support rod 312 is connected to the first limiting ring 321. The upper end of the right side of the first limiting ring 321 is equipped with a third motor 324. The output end of the third motor 324 is connected to a first gear 325. The third motor 324 can drive the first gear 325 to rotate.The inner end of the first limiting component 32 is rotatably connected to the second limiting component 33. The second limiting component 33 can drive the first extension component 34 to extend and retract. The first extension component 34 is slidably connected inside the first limiting frame 331. The outer wall of the first limiting frame 331 is provided with a mounting ring 332. The right end of the mounting ring 332 is provided with a first rotating ring 333. The first rotating ring 333 is rotatably connected inside the first rotating groove 322. The rotation of the first limiting frame 331 and the mounting ring 332 can be limited and guided by the first rotating ring 333 and the first rotating groove 322. The inner wall of the mounting ring 332 is provided with internal teeth 334 around its perimeter. The internal teeth 334 mesh with the outer wall of the first gear 325. Driven by the first gear 325, the mounting ring 332 can be rotated. The outer walls of the first limiting frame 331 are equipped with first telescopic rods 335 at both ends. The output end of the first telescopic rods 335 is connected to the right end of the first extension component 34. Driven by the first telescopic rods 335, the first extension component 34 can be moved to extend and retract inside the first limiting frame 331. The first extension component is slidably connected inside the second limiting component 33. 34. Driven by the second limiting component 33, the extension component 34 can move, and the extension drive can be realized to compress the inner wall of the bridge cylindrical steel structure 2, thereby realizing the internal clamping operation of the bridge cylindrical steel structure 2. The movable ring 341 is slidably connected to the inner center of the first limiting frame 331. The two ends of the right side of the movable ring 341 are connected to the output end of the first telescopic rod 335. Driven by the first telescopic rod 335, the movable ring 341 can move in telescopic movement. The left side of the outer wall of the movable ring 341 is rotatably connected to the first connecting rod 342. One end of the connecting rod 342 is rotatably connected to one end of the inner wall of the L-shaped rod 343. The right end of the L-shaped rod 343 is slidably connected to the groove around the left end of the first limiting frame 331. An inner clamping block 344 is connected to the top of the L-shaped rod 343. Through the movement of the movable ring 341, the first connecting rod 342 pushes or pulls the L-shaped rod 343, thereby causing several sets of inner clamping blocks 344 to expand. This allows the outer wall of the inner clamping block 344 to contact and press against the inner walls of the bridge cylindrical steel structure 2 at both ends, thus clamping and pressing the bridge cylindrical steel structure 2. An external clamping mechanism 4 is installed on the outer left side of the placement mechanism 1. The external clamping mechanism 4 is used to clamp and lift the bridge cylindrical steel structure 2, so that the internal clamping mechanism 3 can be inserted into the interior of the bridge cylindrical steel structure 2. Through the cooperation of the external clamping mechanism 4 and the internal clamping mechanism 3, the bridge cylindrical steel structure 2 can be fixed, which facilitates the laser cutting operation of the bridge cylindrical steel structure 2. The external clamping mechanism 4 includes: a spacing adjustment component 41, a first moving column 411, a drive groove 412, a first guide groove 413, a fourth motor 414, a second bidirectional screw 415, an external clamping component 42, a U-shaped block 421, a second slider 422, a third slider 423, a second telescopic rod 424, a second moving column 425, a second guide box groove 426, a fifth motor 427, a third bidirectional screw 428, and an external clamping block 429.The spacing adjustment assembly 41 is installed on both sides of the left end of the outer wall of the placement platform 11 in the placement mechanism 1. The spacing adjustment assembly 41 can drive the two sets of external clamping assemblies 42 to move closer or further apart. The first moving column 411 is installed on both sides of the left end of the outer wall of the placement platform 11. A drive groove 412 is provided in the middle of the outer wall of the first moving column 411. First guide grooves 413 are provided at the top and bottom of the first moving column 411. A fourth motor 414 is installed on one side of the first moving column 411. A second bidirectional screw 415 is rotatably connected inside the drive groove 412. One end of the second bidirectional screw 415 is connected to the output end of the fourth motor 414. Driven by the fourth motor 414, the second bidirectional screw 415 can be rotated. The outer wall of component 41 is connected to an external clamping assembly 42, which can clamp and lift the outer wall of the bridge cylindrical steel structure 2. A second slider 422 is provided in the middle of the inner wall of the U-shaped block 421. The second slider 422 is slidably connected inside the drive groove 412. The interior of the second slider 422 is threadedly connected to the outer wall of the second bidirectional screw 415. Rotation of the second bidirectional screw 415 can drive the second slider 422 and the U-shaped block 421 to move. A third slider 423 is provided at both the upper and lower ends of the inner wall of the U-shaped block 421. The third slider 423 is slidably connected inside the first guide groove 413. The cooperation between the first guide groove 413 and the third slider 423 can drive the movement of the U-shaped block 421. For limiting and guiding, the top two ends of the U-shaped block 421 are equipped with second telescopic rods 424. The output ends of the second telescopic rods 424 are connected to the front and rear ends of the bottom of the second moving column 425. Driven by the second telescopic rods 424, the second moving column 425 can be driven to move up and down. The bottom left and right ends of the second moving column 425 are provided with second guide box grooves 426. The top rear end of the second moving column 425 is equipped with a fifth motor 427. The bottom middle of the second moving column 425 is rotatably connected to a third bidirectional screw 428. The rear end of the third bidirectional screw 428 is connected to the output end of the fifth motor 427 through a steering gear set. Driven by the fifth motor 427, the third bidirectional screw 428 can be driven to rotate. The outer wall is threadedly connected to the top center of the outer clamping block 429. The outer clamping block 429 is configured as two sets, and the two sets of outer clamping blocks 429 are connected to the two ends of the third bidirectional screw 428. The top two ends of the outer clamping block 429 are slidably connected to the inside of the second guide box groove 426. The second guide box groove 426 can limit and guide the movement of the outer clamping block 429. The rotation of the third bidirectional screw 428 can drive the two sets of outer clamping blocks 429 to move closer or further away from each other, so that the outer clamping block 429 can clamp and fix the outer wall of the bridge cylindrical steel structure 2. With the cooperation of the second telescopic rod 424, the bridge cylindrical steel structure 2 can be lifted, so that the built-in clamping mechanism 3 can be inserted into the two ends of the bridge cylindrical steel structure 2 for built-in clamping operation. The rotating mechanism 5 is connected to the right end of the placement mechanism 1. The rotating mechanism 5 drives the internal cutting mechanism 6 and the external cutting mechanism 7 to rotate, thereby enabling the rotating mechanism 5 to switch modes between the internal cutting mechanism 6 and the external cutting mechanism 7. The rotating mechanism 5 includes: a fourth slider 51, a second support rod 52, a second limiting ring 53, a second rotating groove 54, a second limiting frame 55, a sixth motor 56, a second gear 57, and a fixed gear 58. The fourth slider 51 is slidably connected inside the second limiting groove 14 in the placement mechanism 1. The interior of the fourth slider 51 is threadedly connected to the outer wall of the first screw 18 in the placement mechanism 1. Rotation of the first screw 18 drives the fourth slider 51 to move. The other end of the fourth slider 51 is provided with a second support rod 52, which is located at both ends of the outer wall of the second limiting ring 53. The inner end of the device is provided with a second rotating groove 54, which can limit and guide the rotation of the external cutting mechanism 7. The inner wall of the second limiting ring 53 is provided with a second limiting frame 55. The interior of the second limiting frame 55 is rotatably connected to the built-in cutting mechanism 6. The installation and rotation of the built-in cutting mechanism 6 can be fixed and limited by the second limiting frame 55. The outer end of the second limiting frame 55 is provided with a sixth motor 56. The output end of the sixth motor 56 is connected to a second gear 57. One end of the second gear 57 is meshed with a fixed gear 58. The fixed gear 58 is fixedly installed on the right end of the outer wall of the built-in cutting mechanism 6. Driven by the sixth motor 56, the second gear 57 can be driven to rotate. The rotation of the second gear 57 can drive the fixed gear 58 and the built-in cutting mechanism 6 to rotate, thereby realizing the mode switching operation of the built-in cutting mechanism 6. The built-in cutting mechanism 6 is connected to the internal center of the rotating mechanism 5 and rotates. The built-in cutting mechanism 6 is inserted into the interior of the bridge cylindrical steel structure 2. The built-in cutting mechanism 6 is used to heat, cut and grind the inner wall of the bridge cylindrical steel structure 2. The built-in cutting mechanism 6 includes: a first mounting component 61, a mounting column 611, a second guide groove 612, a second extension mechanism 62, a seventh motor 621, a rotating shaft 622, a second screw 623, a fifth slider 624, a first movable rod 625, a second movable rod 626, a bracket 627, a first heating component 63, a first laser cutting component 64, a first grinding component 65, a second grinding component 66, a bearing 661, a third telescopic rod 662, a grinding disc 663 and an eighth motor 664. The right end of the outer wall of the first mounting component 61 is rotatably connected to the inner center of the second limiting frame 55 in the rotating mechanism 5. The right end of the outer wall of the mounting column 611 is rotatably connected to the inner center of the second limiting frame 55. The left end of the outer wall of the mounting column 611 is provided with a second guide groove 612 around its perimeter. The second guide groove 612 can limit and guide the movement of the second extension mechanism 62. The left end of the outer wall of the first mounting component 61 is equipped with the second extension mechanism 62. Through the extension movement of the second extension mechanism 62, the first heating component 63, the first laser cutting component 64, the first grinding component 65, and the second grinding component 66 can be driven to move closer to the inner wall of the bridge cylindrical steel structure 2. The seventh motor 621 is installed at the right port of the mounting column 611. The output end is connected to a rotating shaft 622, which is rotatably connected inside the mounting post 611. Several sets of second screws 623 are connected to the outer wall of the rotating shaft 622 via a sprocket and chain drive. The second screws 623 are rotatably connected to the second guide groove 612. The outer wall of the second screws 623 is threadedly connected to the interior of the fifth slider 624, which is slidably connected inside the second guide groove 612. The second guide groove 612 limits and guides the movement of the fifth slider 624. Rotation of the second screws 623 drives the fifth slider 624 to move. The top of the fifth slider 624 is rotatably connected to the right end of the first movable rod 625, and the left end of the first movable rod 625 is rotatably connected to the second... The lower side of the movable rod 626 and the bottom of the second movable rod 626 are rotatably connected to the outer wall of the mounting column 611. A bracket 627 is mounted on the top of the second movable rod 626. Four sets of brackets 627 are configured to install and place the first heating component 63, the first laser cutting component 64, the first grinding component 65, and the second grinding component 66. The movement of the fifth slider 624 can move the first movable rod 625, the second movable rod 626, and the brackets 627, thereby expanding the brackets 627 so that the first heating component 63, the first laser cutting component 64, the first grinding component 65, and the second grinding component 66 installed inside the brackets 627 are close to the inner wall of the bridge cylindrical steel structure 2.To facilitate heating, laser cutting, and grinding of the inner wall of the bridge cylindrical steel structure 2 using the first heating component 63, the first laser cutting component 64, the first grinding component 65, and the second grinding component 66, the second extension mechanism 62 has the first heating component 63 installed at its front end. The first heating component 63 consists of a heating nozzle and a heating pipe. Gas is injected into the heating nozzle through the heating pipe, causing the heating nozzle to heat the cutting area. The first laser cutting component 64 is installed at the upper end of the second extension mechanism 62. The first laser cutting component 64 consists of a laser cutting nozzle and a pipe, enabling laser cutting of the heated and ground cutting area. The first grinding component 65 is installed at the rear end of the second extension mechanism 62. The structure of the first grinding component 65 is the same as that of the second grinding component 66, except that the grit number of the grinding disc 663 in the first grinding component 65 is different from that in the second grinding component 66. The grinding discs have different grit sizes. The first grinding component 65 is used to grind the inner wall of the bridge cylindrical steel structure 2 before cutting. The lower end of the second extension mechanism 62 is equipped with a second grinding component 66, which is used to grind the inner wall of the bridge cylindrical steel structure 2 after cutting. A bearing 661 is installed inside the lower bracket 627, and a third telescopic rod 662 is installed inside the bearing 661. The output end of the third telescopic rod 662 is connected to the grinding disc 663. Driven by the third telescopic rod 662, the grinding disc 663 can be driven to contact the inner wall of the bridge cylindrical steel structure 2. An eighth motor 664 is installed on the left end of the bracket 627. The output end of the eighth motor 664 is connected to the lower end of the outer wall of the third telescopic rod 662 through a sprocket and chain. Driven by the eighth motor 664, the third telescopic rod 662 and the grinding disc 663 can be driven to rotate, thereby causing the grinding disc 663 to perform grinding operations on the inner wall of the bridge cylindrical steel structure 2. An external cutting mechanism 7 is connected to the left end of the rotating mechanism 5. The external cutting mechanism 7 is located around the outside of the built-in cutting mechanism 6. The external cutting mechanism 7 is used to heat, cut, and grind the outer wall of the bridge cylindrical steel structure 2. Through the cooperation of the built-in cutting mechanism 6 and the external cutting mechanism 7, it is used to simultaneously operate on the inner and outer walls of the bridge cylindrical steel structure 2. The external cutting mechanism 7 includes: a third limiting component 71, a third limiting ring 711, a third support rod 712, a third guide groove 713, an arc-shaped outer frame 714, a fourth limiting ring 715, a third rotating groove 716, an internal gear ring 717, a third extension component 72, a shaft 721, a third gear 722, a fourth gear 723, an extension rod 724, a sixth slider 725, and teeth 7. 26. Installation and auxiliary components 73, support rod 731, mounting plate 732, crossbar 733, second connecting rod 734, auxiliary arc plate 735, fourth telescopic rod 736, spring 737, second heating component 74, second laser cutting component 75, third grinding component 76, and fourth grinding component 77; the right end of the third limiting component 71 is rotatably connected to the inside of the second rotating groove 54 in the rotating mechanism 5. The third limiting component 71 can limit and install the movement of the third extension component 72. The right end surface of the third limiting ring 711 is equipped with a third support rod 712. The right end of the third support rod 712 is slidably connected to the inside of the second rotating groove 54. The left end surface of the third limiting ring 711 is provided with a third guide groove 713. An arc-shaped outer frame 714 is installed around the outer wall of ring 711. A fourth limiting ring 715 is installed on the left end of the inner wall of the arc-shaped outer frame 714. A third rotating groove 716 is installed on the inner wall of the fourth limiting ring 715. An internal gear ring 717 is rotatably connected inside the third rotating groove 716. A third extension component 72 is installed around the inner periphery of the third limiting component 71. Driven by the third extension component 72, the third extension component 72 can be extended. A shaft 721 is rotatably connected around the third limiting ring 711 and the fourth limiting ring 715 through a shaft seat. There are four sets of shafts 721. A third gear 722 is installed on the left end of the outer wall of shaft 721. The outer wall of the third gear 722 meshes with the inner wall of the internal gear ring 717. The right end of the outer wall of shaft 721... A fourth gear 723 is installed at one end. The right end of a set of shafts 721 is connected to a ninth motor, which is mounted on the upper end of the right surface of the third limit ring 711. Driven by the ninth motor, the shafts 721, the third gear 722, and the fourth gear 723 can be rotated, thereby causing the third gear 722 to drive the internal gear ring 717 to rotate. The rotation of the internal gear ring 717 can drive several sets of third gears 722 to rotate simultaneously. An extension rod 724 is provided between the two sets of arc-shaped outer frames 714. An installation and auxiliary component 73 is installed on the outer port of the extension rod 724. There are four sets of extension rods 724. A sixth slider 725 is installed on the right end of the extension rod 724. The sixth slider 725 is slidably connected inside the third guide groove 713.The expansion movement of the extension rod 724 can be limited and guided by the third guide groove 713 and the sixth slider 725. One side end of the extension rod 724 is provided with teeth 726, which mesh with the outer wall of the fourth gear 723. By rotating the fourth gear 723 and cooperating with the teeth 726, the four sets of extension rods 724 can be driven to expand. The outer wall of the third expansion component 72 is equipped with four sets of installation and auxiliary components 73. The second heating component 74, the second laser cutting component 75, the third grinding component 76 and the fourth grinding component 77 can be installed through the installation and auxiliary components 73. The second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77 can be brought close to the outer wall of the bridge cylindrical steel structure 2 through the expansion activities of the installation and auxiliary components 73, thereby performing heating, laser cutting, and grinding operations on the cutting area of ​​the outer wall of the bridge cylindrical steel structure 2. The bottom right end of the support rod 731 is installed on the top of the extension rod 724, and the bottom left end of the support rod 731 is installed with a mounting plate 732. The second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77 can be installed through the mounting plate 732. A horizontal crossbar is provided in the middle of the left end of the support rod 731. The second connecting rod 734 is rotatably connected to the inner middle of the mounting plate 732. The right end of the second connecting rod 734 is rotatably connected to the auxiliary arc plate 735. The bottom of the auxiliary arc plate 735 contacts the outer wall of the bridge cylindrical steel structure 2. The top right end of the second connecting rod 734 is rotatably connected to the right end of the fourth telescopic rod 736. The left end of the fourth telescopic rod 736 is rotatably connected to the middle of the right end of the crossbar 733. A spring 737 is provided on the outer wall of the fourth telescopic rod 736. Through the cooperation of the second connecting rod 734, the fourth telescopic rod 736 and the spring 737, the auxiliary arc plate 735 contacts the outer wall of the bridge cylindrical steel structure 2, thereby enabling the auxiliary arc plate 735 to contact the external cutting machine. The external cutting mechanism 7 supports the operation of the second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77. As the external cutting mechanism 7 penetrates deeper into the bridge cylindrical steel structure 2, the auxiliary arc plate 735 moves accordingly, ensuring that the auxiliary arc plate 735 remains in contact with the outer wall of the bridge cylindrical steel structure 2. This allows the installation and auxiliary components 73 to consistently support the operation of the second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77. The structures of the second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77 are identical to those of the first heating component 63, the first laser cutting component 64, the first grinding component 65, and the second grinding component 66.

[0022] In practical use, those skilled in the art activate the fourth motor 414 of the external clamping mechanism 4 to drive the second bidirectional screw 415 to rotate, causing the two sets of external clamping components 42 to move closer to each other along the first guide groove 413 until the external clamping blocks 429 are aligned with the two ends of the outer wall of the bridge cylindrical steel structure 2. Then, the fifth motor 427 is activated, and the two sets of external clamping blocks 429 are driven to clamp the outer wall of the workpiece through the third bidirectional screw 428. Then, the second telescopic rod 424 is activated, causing the second moving column 425 to rise and lift the workpiece to a preset height. The first motor 15 is activated, driving the first bidirectional screw 16 to rotate, causing the two sets of internal clamping mechanisms 3 to move along the first limiting groove 13 towards the two ends of the workpiece, so that the first extension component 34 extends into the workpiece. Finally, the first telescopic rod 335 is activated to push... The movable ring 341 slides to the left, driving the L-shaped rod 343 to expand outward along the slide groove via the first connecting rod 342 until the inner clamping block 344 is tightly against the inner wall of the workpiece and applies a preset clamping force, completing the internal fixation of the workpiece. The fifth motor 427 and the second telescopic rod 424 are started again, causing the outer clamping block 429 to be released and reset. The workpiece is then supported and fixed by the internal clamping mechanism 3 alone. The second motor 17 is started, driving the first screw 18 to rotate, which drives the rotating mechanism 5 and the internal cutting mechanism 6 and the external cutting mechanism 7 connected to it to move along the second limiting groove 14 until the internal cutting mechanism 6 and the external cutting mechanism 7 move to the cutting area. At this time, the first heating component 63, the first laser cutting component 64, the first grinding component 65 and the second grinding component 66 are connected to the first laser cutting component 64. The second heating assembly 74, the second laser cutting assembly 75, the third grinding assembly 76, and the fourth grinding assembly 77 are placed opposite each other, with the first heating assembly 63, the first laser cutting assembly 64, the first grinding assembly 65, and the second grinding assembly 66 near the inner wall of the bridge cylindrical steel structure 2, and the second heating assembly 74, the second laser cutting assembly 75, the third grinding assembly 76, and the fourth grinding assembly 77 near the outer wall of the bridge cylindrical steel structure 2. The seventh motor 621 of the built-in cutting mechanism 6 is activated, driving the rotating shaft 622 to rotate. Through the sprocket and chain, it drives multiple sets of second screws 623 to rotate synchronously, causing the fifth slider 624 to slide along the second guide groove 612. The fifth slider 624 pushes the second movable rod 62 through the first movable rod 625. The mechanism 6 expands outward, causing the bracket 627 and the first heating component 63, first laser cutting component 64, first grinding component 65, and second grinding component 66 mounted on it to move closer to the inner wall of the bridge cylindrical steel structure 2. This activates the ninth motor of the external cutting mechanism 7, driving a set of shafts 721 to rotate. This, in turn, drives the internal gear ring 717 to rotate via the third gear 722, thereby driving all shafts 721 to rotate synchronously. The fourth gear 723 meshes with the teeth 726 of the extension rod 724, causing the four sets of extension rods 724 to expand outward along the third guide groove 713, bringing the installation and auxiliary components 73 closer to the outer wall of the workpiece. This activates the fourth telescopic rod 736, pushing the second connecting rod 734 to cause the auxiliary arc plate 735 to press tightly against the outer wall of the bridge cylindrical steel structure 2, forming a stable support.The positions of the second heating component 74, the second laser cutting component 75, the third grinding component 76, and the fourth grinding component 77 are adjusted. Preheating and grinding are then performed in a coordinated pre-treatment process. The first heating component 63 and the second heating component 74 are activated, and the rotating mechanism 5 drives the built-in cutting mechanism 6 and the external cutting mechanism 7 to rotate, synchronously preheating the inner and outer wall cutting areas of the bridge cylindrical steel structure 2 in a ring. The preheating temperature is monitored in real time by a temperature sensor and maintained within a preset range. After preheating for 15-30 minutes, the first grinding component 65 and the third grinding component 76 are activated to perform rough grinding on the inner and outer wall cutting areas, removing the surface oxide layer and minor protrusions to ensure laser absorption rate. During rough grinding, the auxiliary arc plate 735 moves synchronously with the grinding position, always maintaining support for the workpiece. After preheating and rough grinding are completed, [the system is then incomplete]. While the heating components continue to operate, the first laser cutting component 64 and the second laser cutting component 75 are activated to simultaneously laser cut the inner and outer walls of the workpiece according to a preset cutting path. During the cutting process, the third motor 324 is activated, driving the first gear 325 to rotate. This gear, through the internal teeth 334, drives the mounting ring 332 and the first limiting frame 331 to rotate, thereby causing the bridge cylindrical steel structure 2 to rotate at a uniform speed, achieving ring cutting. After the cutting components have moved, the second grinding component 66 and the fourth grinding component 77 simultaneously perform fine grinding on the inner and outer wall cuts to remove burrs and residual oxide layers. After fine grinding is completed, the laser cutting components and grinding components are turned off, and the heating components continue to operate for 5 minutes. Subsequently, the heating temperature is gradually reduced to room temperature to avoid internal stress in the workpiece due to sudden cooling. During the cooling process, auxiliary gas is continuously blown through the cut to prevent secondary oxidation.

[0023] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A laser cutting device for bridge steel formwork, comprising: A placement mechanism and a bridge cylindrical steel structure are provided. The placement mechanism is placed on the ground, and its interior is used for transporting and placing the bridge cylindrical steel structure. The features are as follows: The left end of the placement mechanism has two internal clamping mechanisms connected to its inner sides. These internal clamping mechanisms are configured in two sets to clamp and fix the inner ends of the bridge cylindrical steel structure. An external clamping mechanism is installed on the outer side of the left end of the placement mechanism to clamp and lift the bridge cylindrical steel structure. The right end of the placement mechanism is connected to a rotating mechanism to drive the internal and external cutting mechanisms. The rotating mechanism has a rotatable connection to the internal center of the internal cutting mechanism, which is inserted into the bridge cylindrical steel structure to heat, cut, and grind the inner wall of the structure. The left end of the rotating mechanism is connected to an external cutting mechanism, which is positioned around the outer perimeter of the internal cutting mechanism to heat, cut, and grind the outer wall of the bridge cylindrical steel structure. Through the cooperation of the internal and external cutting mechanisms, both the inner and outer walls of the bridge cylindrical steel structure can be operated simultaneously.

2. The laser cutting equipment for bridge steel formwork according to claim 1, characterized in that, The placement mechanism includes: a placement platform; A placement platform is placed on the ground. The inner wall of the placement platform is arc-shaped. A transmission roller is located at the middle of the lower end of the placement platform. The left side of the inner wall of the placement platform has first limiting grooves on both sides. An internal clamping mechanism is slidably connected inside the first limiting groove. The upper sides of both ends of the inner wall of the placement platform have second limiting grooves. An external clamping mechanism is slidably connected inside the second limiting groove. The lower ends of the right side of the placement platform are equipped with a first motor. The output end of the first motor is connected to the right port of a first bidirectional screw. The first bidirectional screw is rotatably connected inside the first limiting groove. An internal clamping mechanism is connected to the outer wall of the first bidirectional screw. The upper ends of the right side of the placement platform are equipped with a second motor. The first screw is rotatably connected inside the second limiting groove. The right port of the first screw is connected to the second motor. A rotating mechanism is connected to the outer wall of the first screw.

3. The laser cutting equipment for bridge steel formwork according to claim 2, characterized in that, The built-in clamping mechanism includes: a support component; The bottom of the support component is slidably connected to the inside of the first limiting groove in the placement mechanism. The bottom of the support component is threadedly connected to the outer wall of the first bidirectional screw in the placement mechanism. The inner end of the support component is connected to the first limiting component. The inner end of the first limiting component is rotatably connected to the second limiting component. The inside of the second limiting component is slidably connected to the first extension component.

4. The laser cutting equipment for bridge steel formwork according to claim 3, characterized in that, The support component includes: a first slider; The first slider is slidably connected inside the first limiting groove. The inside of the first slider is threadedly connected to the outer wall of the first bidirectional screw. The upper end of the first slider is provided with a first support rod. The inner end of the first support rod is provided with a threaded post. The threaded post and the first limiting component can be detachably installed. The first limiting component includes: a first limiting ring; The inner end of the first limiting ring is provided with a first rotating groove, and the second limiting component is rotatably connected inside the first rotating groove. Mounting blocks are provided on both sides of the lower end of the inner wall of the first limiting ring, and the mounting blocks are provided with threads inside. A third motor is installed on the upper end of the right side of the first limiting ring, and the output end of the third motor is connected to a first gear. The second limiting component includes: a first limiting frame; The first limiting frame has a first extension component slidably connected inside. The outer wall of the first limiting frame is provided with a mounting ring. The right end of the mounting ring is provided with a first rotating ring. The first rotating ring is rotatably connected inside the first rotating groove. The inner wall of the mounting ring is provided with internal teeth around its perimeter. The internal teeth mesh with the outer wall of the first gear. The two ends of the outer wall of the first limiting frame are provided with first telescopic rods. The output end of the first telescopic rod is connected to the right end of the first extension component. The first extended component includes: an active ring; The movable ring is slidably connected to the inner center of the first limiting frame. The two ends of the right side of the movable ring are connected to the output end of the first telescopic rod. The left side of the outer wall of the movable ring is rotatably connected to the first connecting rod. The other end of the first connecting rod is rotatably connected to one end of the inner wall of the L-shaped rod. The right end of the L-shaped rod is slidably connected to the inside of the sliding groove around the left side of the first limiting frame. The top of the L-shaped rod is connected to the inner clamping block.

5. The laser cutting equipment for bridge steel formwork according to claim 4, characterized in that, The external clamping mechanism includes: a spacing adjustment component; The spacing adjustment components are installed on both sides of the left end of the outer wall of the placement platform in the placement mechanism, and the outer wall of the spacing adjustment components is connected to the outer clamping components. The spacing adjustment component includes: a first movable column; The first movable column is installed on both sides of the left end of the outer wall of the placement platform. The middle of the outer wall of the first movable column is provided with a drive groove. The top and bottom of the first movable column are provided with first guide grooves. A fourth motor is installed on one side port of the first movable column. A second bidirectional screw is rotatably connected inside the drive groove. One end of the second bidirectional screw is connected to the output end of the fourth motor. The external clamping assembly includes: a U-shaped block; The inner wall of the U-shaped block has a second slider in the middle, which is slidably connected to the inside of the drive groove. The inside of the second slider is threadedly connected to the outer wall of the second bidirectional screw. The upper and lower ends of the inner wall of the U-shaped block have third sliders, which are slidably connected to the inside of the first guide groove. The top two ends of the U-shaped block are equipped with second telescopic rods, the output ends of which are connected to the front and rear ends of the bottom of the second moving column. The bottom left and right ends of the second moving column are equipped with second guide box grooves. The top rear end of the second moving column is equipped with a fifth motor. The bottom middle of the second moving column is rotatably connected to a third bidirectional screw. The rear end of the third bidirectional screw is connected to the output end of the fifth motor through a steering gear set. The outer wall of the third bidirectional screw is threadedly connected to the top middle of the outer clamping block. The outer clamping block is set in two sets, which are connected to the two ends of the third bidirectional screw. The top two ends of the outer clamping block are slidably connected to the inside of the second guide box groove.

6. The laser cutting equipment for bridge steel formwork according to claim 5, characterized in that, The rotating mechanism includes: a fourth slider; The fourth slider is slidably connected inside the second limiting groove in the placement mechanism. The interior of the fourth slider is threadedly connected to the outer wall of the first screw in the placement mechanism. The other end of the fourth slider is provided with a second support rod. The second support rod is set at both ends of the outer wall of the second limiting ring. The inner end of the second limiting ring is provided with a second rotating groove. The inner wall of the second limiting ring is provided with a second limiting frame. The interior of the second limiting frame is rotatably connected to the built-in cutting mechanism. The outer end of the second limiting frame is equipped with a sixth motor. The output end of the sixth motor is connected to a second gear. One end of the second gear meshes with a fixed gear. The fixed gear is fixedly installed on the right end of the outer wall of the built-in cutting mechanism.

7. A laser cutting device for bridge steel formwork according to claim 6, characterized in that, The built-in cutting mechanism includes: a first mounting component; The right end of the outer wall of the first mounting component is rotatably connected to the inner center of the second limiting frame in the rotating mechanism. The left end of the outer wall of the first mounting component is equipped with a second extension mechanism. The front end of the second extension mechanism is equipped with a first heating component. The upper end of the second extension mechanism is equipped with a first laser cutting component. The rear end of the second extension mechanism is equipped with a first grinding component. The lower end of the second extension mechanism is equipped with a second grinding component.

8. The laser cutting equipment for bridge steel formwork according to claim 7, characterized in that, The first mounting component includes: a mounting post; The right end of the outer wall of the mounting column is rotatably connected to the inner center of the second limiting frame, and the left end of the outer wall of the mounting column is provided with a second guide groove around its perimeter. The second extension mechanism includes: a seventh motor; The seventh motor is installed at the right port of the mounting column. The output end of the seventh motor is connected to a rotating shaft, which is rotatably connected inside the mounting column. Several sets of second screws are connected to the outer wall of the rotating shaft through a sprocket and chain drive. The second screws are rotatably connected to the second guide groove. The outer wall of the second screw is threadedly connected to the inside of the fifth slider. The fifth slider is slidably connected inside the second guide groove. The top of the fifth slider is rotatably connected to the right port of the first movable rod. The left end of the first movable rod is rotatably connected to the lower side of the second movable rod. The bottom of the second movable rod is rotatably connected to the outer wall of the mounting column. A bracket is installed on the top of the second movable rod. The second polishing assembly includes: a bearing; The bearing is installed inside the lower bracket, and the third telescopic rod is installed inside the bearing. The output end of the third telescopic rod is connected to the grinding disc. The eighth motor is installed on the left end of the bracket, and the output end of the eighth motor is connected to the lower end of the outer wall of the third telescopic rod through a sprocket and a chain.

9. A laser cutting device for bridge steel formwork according to claim 8, characterized in that, The external cutting mechanism includes: a third limiting component; The right end of the third limiting component is rotatably connected to the inside of the second rotating groove in the rotating mechanism. The third limiting component is equipped with a third extension component around its interior, and an installation and auxiliary component is installed around the outer wall of the third extension component. The installation and auxiliary component is set to four sets.

10. A laser cutting device for bridge steel formwork according to claim 9, characterized in that, The third limiting component includes: a third limiting ring; The right end surface of the third limiting ring is equipped with a third support rod, the right end of the third support rod is slidably connected to the inside of the second rotating groove, the left end surface of the third limiting ring is provided with a third guide groove, the outer wall of the third limiting ring is equipped with an arc-shaped outer frame, the inner wall of the arc-shaped outer frame is equipped with a fourth limiting ring, the inner wall of the fourth limiting ring is equipped with a third rotating groove, and the inside of the third rotating groove is rotatably connected to an internal toothed ring. The third extension component includes: a shaft; The shaft is rotatably connected to the third and fourth limiting rings via a bearing seat. There are four sets of shafts. A third gear is installed on the left end of the outer wall of the shaft. The outer wall of the third gear meshes with the inner wall of the inner gear ring. A fourth gear is installed on the right end of the outer wall of the shaft. The right end of one set of shafts is connected to the ninth motor. The ninth motor is installed on the upper end of the right end surface of the third limiting ring. An extension rod is provided between the two sets of arc-shaped outer frames. An installation and auxiliary component is installed on the outer port of the extension rod. There are four sets of extension rods. A sixth slider is installed on the right end of the extension rod. The sixth slider is slidably connected inside the third guide groove. A tooth is provided on the side end of the extension rod. The tooth meshes with the outer wall of the fourth gear. The installation and auxiliary components include: a support rod; The bottom right end of the support rod is installed on the top of the extension rod, and the bottom left end of the support rod is equipped with an installation plate. A crossbar is provided in the middle of the left end of the support rod. The second connecting rod is rotatably connected to the middle inner side of the installation plate. The right end of the second connecting rod is rotatably connected to the auxiliary arc plate. The top right end of the second connecting rod is rotatably connected to the right end of the fourth telescopic rod. The left end of the fourth telescopic rod is rotatably connected to the middle right end of the crossbar. A spring is provided on the outer wall of the fourth telescopic rod.

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