Auxiliary welding device for steel structure processing

Abstract

The application discloses an auxiliary welding device for steel structure machining, which comprises a rack, a first rotating frame, a rotating drive mechanism, a fixing assembly, a U-shaped steel, a first support frame, a steel pipe, a jacking mechanism, a pressing mechanism and a round runout detection mechanism.

Description

Technical Field

[0001] This invention relates to the field of steel structure processing, and more specifically, to an auxiliary welding device for steel structure processing. Background Technology

[0002] In the field of steel structure processing and manufacturing for modern buildings, bridges, and machinery, the connection and welding of steel pipes and structural steel (such as U-shaped steel) is a core process. In the circumferential welding operation of welding the end of the steel pipe to the side wall of the U-shaped steel, the clamping and positioning accuracy of the components, the fit of the end face, and the deformation of the pipe itself directly determine the quality of the welded joint and the overall structural strength.

[0003] During processing, transportation, or storage, steel pipes often undergo bending, elliptic deformation due to external forces or residual stress. Most existing welding auxiliary equipment lacks automated inspection methods before welding. If steel pipes with bending or elliptic deformation are directly subjected to rotary welding, it will cause severe circular runout and misalignment during the welding rotation process. This not only reduces the aesthetics of the weld and the strength of the joint, but may also lead to the scrapping of the entire batch of workpieces.

[0004] Therefore, providing an auxiliary welding device for steel structure processing that can accurately detect the circular runout of steel pipes before welding is a problem that this invention urgently needs to solve. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this invention is to overcome the fact that steel pipes often undergo bending, ellipticization, and other deformations due to external forces or residual stresses during processing, transportation, or storage. Most existing welding auxiliary equipment lacks automated pre-welding inspection methods. Directly performing rotary welding on steel pipes with bending or elliptic deformation can lead to severe circular runout and misalignment during the welding rotation process, not only reducing the aesthetics and joint strength of the weld but also potentially causing the entire batch of workpieces to be scrapped. Therefore, this invention provides an auxiliary welding device for steel structure processing that can accurately detect the circular runout of steel pipes before welding.

[0006] To achieve the above objectives, the present invention provides an auxiliary welding device for steel structure processing, comprising: a frame; a first rotating frame and a rotation drive mechanism, wherein the first rotating frame is rotatably mounted on the frame via the rotation drive mechanism; a fixing component and a U-shaped steel, wherein the U-shaped steel is detachably mounted on the end of the first rotating frame away from the rotation drive mechanism via the fixing component; a first support frame and a steel pipe, wherein a first support frame for supporting the steel pipe is further provided on one side of the first rotating frame; a clamping mechanism provided on one side of the first support frame for clamping one end of the steel pipe against the side wall of the U-shaped steel; a pressing mechanism provided on one side of the first support frame for pressing the steel pipe against the first support frame; and a circular runout detection mechanism provided below the steel pipe for detecting the circular runout of the steel pipe.

[0007] Preferably, the fixing component includes: a card holder disposed at the end of the first rotating frame away from the rotary drive mechanism, and having a recessed groove adapted to the U-shaped steel; a switchable magnetic base disposed inside the card holder; and a magnetic control component disposed on the first rotating frame for controlling the presence or absence of magnetic force on the switchable magnetic base.

[0008] Preferably, the magnetic control component includes: a first bevel gear disposed at the input end of the switchable magnetic base; a second bevel gear and a first rotary drive motor, wherein the second bevel gear is rotatably disposed on one side of the first bevel gear through meshing with the first rotary drive motor.

[0009] Preferably, the rotary drive mechanism includes: a worm gear reducer, the output end of which is connected to one end of the first rotating frame; and a second rotary drive motor, the output end of which is connected to the input end of the worm gear reducer.

[0010] Preferably, the clamping mechanism includes a first linear actuator and a push rod, wherein the push rod is disposed on one side of the first support frame and can be pushed by the first linear actuator to reciprocate toward the side wall of the U-shaped steel.

[0011] Preferably, a rotating top block is rotatably provided at the end of the push rod away from the first linear actuator.

[0012] Preferably, the clamping mechanism includes: a second rotating frame, which is rotatably disposed on one side of the first support frame, and a clamping wheel is rotatably disposed on its upper end; and a second linear drive, one end of which is hinged to the lower part of the frame and the other end of which is hinged to the lower end of the second rotating frame.

[0013] Preferably, the circular runout detection mechanism includes: an elastic sheet disposed below the steel pipe; a second support frame disposed on the elastic sheet and capable of supporting the steel pipe; and a distance sensor assembly disposed below the elastic sheet for detecting the fluctuation changes of the elastic sheet.

[0014] Preferably, the first support frame and the second support frame are each provided with a plurality of rollers that can abut against the steel pipe.

[0015] According to the above technical solution, the beneficial effects of this invention compared to the prior art are as follows: This application overcomes the problem that steel pipes often undergo bending, ellipticization, and other deformations due to external forces or residual stresses during processing, transportation, or storage. Most existing welding auxiliary equipment lacks automated pre-welding inspection methods. If steel pipes with bending or elliptic deformation are directly subjected to rotary welding, severe circular runout and misalignment will occur during the welding rotation process, which not only reduces the aesthetics of the weld and the joint strength but may also lead to the scrapping of the entire batch of workpieces. Therefore, this invention provides an auxiliary welding device for steel structure processing that can accurately detect the circular runout of steel pipes before welding.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention. Figure 1 ; Figure 2 This is a three-dimensional auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention. Figure 2 ; Figure 3 This is a plan view of an auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention; Figure 4 This is a partial three-dimensional view of the auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention. Figure 1 ; Figure 5 This is a partial three-dimensional view of the auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention. Figure 2 ; Figure 6 This is a partial three-dimensional view of the auxiliary welding device for steel structure processing provided in a preferred embodiment of the present invention. Figure 3 .

[0018] Explanation of reference numerals in the attached drawings: 1. Frame; 11. First support frame; 111. Roller; 2. First rotating frame; 3. Rotary drive mechanism; 31. Worm gear reducer; 32. Second rotary drive motor; 4. Fixing assembly; 41. Card holder; 42. Switchable magnetic base; 43. Magnetic control assembly; 431. First bevel gear; 432. Second bevel gear; 433. First rotary drive motor; 5. U-shaped steel; 6. Steel pipe; 7. Tightening mechanism; 71. First linear actuator; 72. Push rod; 73. Rotating top block; 8. Pressing mechanism; 81. Second linear actuator; 82. Second rotating frame; 83. Pressing wheel; 9. Circular runout detection mechanism; 91. Elastic sheet; 92. Second support frame; 93. Distance sensor assembly. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] In the description of the embodiments of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Additionally, the terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0022] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 and Figure 2 An auxiliary welding device for steel structure processing includes: a frame 1; a first rotating frame 2 and a rotation drive mechanism 3, wherein the first rotating frame 2 is rotatably mounted on the frame 1 via the rotation drive mechanism 3; a fixing component 4 and a U-shaped steel 5, wherein the U-shaped steel 5 is detachably mounted on the end of the first rotating frame 2 away from the rotation drive mechanism 3 via the fixing component 4; a first support frame 11 and a steel pipe 6, wherein a first support frame 11 for supporting the steel pipe 6 is also provided on one side of the first rotating frame 2; a pressing mechanism 7, which is provided on one side of the first support frame 11 for pressing one end of the steel pipe 6 against the side wall of the U-shaped steel 5; a clamping mechanism 8, which is provided on one side of the first support frame 11 for clamping the steel pipe 6 onto the first support frame 11; and a circular runout detection mechanism 9, which is provided below the steel pipe 6 for detecting the circular runout of the steel pipe 6.

[0024] The frame 1 serves as the overall mounting base. The first rotating frame 2 is driven by the rotary drive mechanism 3 to achieve rotational movement. The U-shaped steel is detachably mounted on the end of the first rotating frame 2 with the aid of the fixing component 4. The steel pipe 6 is placed on the first support frame 11. The clamping mechanism 7 pushes the steel pipe 6 axially, so that the end of the steel pipe 6 is tightly pressed against the side wall welding position of the U-shaped steel 5 to eliminate the butt gap. The pressing mechanism 8 presses the steel pipe 6 tightly on the first support frame 11 to limit the radial displacement and warping of the steel pipe 6. The circular runout detection mechanism 9 is arranged below the steel pipe 6 to detect the circular runout of the steel pipe 6 and identify defects such as bending and elliptical deformation of the steel pipe 6. After clamping, the rotary drive mechanism 3 drives the first rotating frame 2 and the U-shaped steel 5 to rotate circumferentially. The steel pipe 6 is constrained and kept in place by the clamping mechanism 7 and the pressing mechanism 8. The welding gun position is fixed. The circumferential weld between the steel pipe 6 and the U-shaped steel 5 is completed by the rotation of the workpiece. Before welding, the steel pipe 6 is inspected by the circular runout detection mechanism 9. If the runout exceeds the tolerance, the workpiece posture can be adjusted or the workpiece can be replaced to avoid the misalignment and weld defects caused by direct welding of deformed workpieces. After welding, the constraints of the pressing, clamping and fixing components 4 are released, and the welded component can be removed for the processing of the next workpiece.

[0025] Reference Figure 5 The fixing component 4 includes: a card holder 41, which is disposed at the end of the first rotating frame 2 away from the rotating drive mechanism 3 and has a recessed groove adapted to the U-shaped steel 5; a switchable magnetic base 42, which is disposed inside the card holder 41; and a magnetic control component 43, which is disposed on the first rotating frame 2 for controlling the presence or absence of magnetic force on the switchable magnetic base 42.

[0026] The groove of the card holder 41 in this application is adapted to the shape of the U-shaped steel 5. The shape is pre-positioned first, and then locked by magnetic attraction through the switch-type magnetic seat 42. The positioning is reliable, and the U-shaped steel 5 is not easy to deviate during the rotation process, ensuring the welding and docking accuracy. The clamping and releasing are achieved by magnetic force, without the need to tighten bolts, pressure plates and other fasteners, saving the bolt disassembly and assembly process. The loading and unloading speed of the U-shaped steel 5 is fast.

[0027] Reference Figure 6 The magnetic control component 43 includes: a first bevel gear 431, which is disposed at the input end of the switchable magnetic base 42; a second bevel gear 432 and a first rotary drive motor 433, wherein the second bevel gear 432 is rotatably disposed on one side of the first bevel gear 431 through meshing with the first rotary drive motor 433.

[0028] The first rotary drive motor 433 outputs power to drive the second bevel gear 432 to rotate. The second bevel gear 432 meshes with the first bevel gear 431 to form a bevel gear reversing transmission mechanism. The first bevel gear 431 is connected to the input end of the switch-type magnetic base 42. The switch-type magnetic base 42 completes the magnetic switching by the rotation action of the input end.

[0029] Reference Figure 2 The rotary drive mechanism 3 includes: a worm gear reducer 31, the output end of which is connected to one end of the first rotating frame 2; and a second rotary drive motor 32, the output end of which is connected to the input end of the worm gear reducer 31.

[0030] The worm gear reducer 31 of this application can reduce the output speed of the second rotary drive motor 32 and amplify the output torque, enabling the first rotating frame 2 and U-shaped steel 5 to withstand a larger load, meeting the usage requirements of rotary welding of heavy steel structure workpieces. The worm gear pair has a self-locking function. After the motor is powered off and stopped, the first rotating frame 2 will not rotate randomly due to the weight of the workpiece or the external force of welding. The first rotating frame 2 can be stably locked in any position, which is convenient for workpiece clamping, inspection and welding shutdown operations, and improves the safety of equipment operation.

[0031] Reference Figure 3 The clamping mechanism 7 includes a first linear actuator 71 and a push rod 72. The push rod 72 is disposed on one side of the first support frame 11 and can be pushed by the first linear actuator 71 to reciprocate toward the side wall of the U-shaped steel 5.

[0032] This application relies on the first linear actuator 71 to drive the push rod 72 to make linear feed, which can stably apply axial clamping force, press the end face of the steel pipe 6 against the side wall of the U-shaped steel 5, eliminate the butt joint gap, reduce defects such as welding misalignment and incomplete penetration, and improve the butt joint assembly accuracy.

[0033] Reference Figure 3 The push rod 72 has a rotating top block 73 rotatably disposed at the end away from the first linear actuator 71.

[0034] This application uses a rotatable top block 73 to adaptively follow the rotation of the steel pipe 6, converting sliding friction into rolling friction, effectively protecting the end face accuracy of the steel pipe 6, avoiding damage to the workpiece's appearance and structure, and ensuring the accuracy of the welding foundation.

[0035] Reference Figure 4 The pressing mechanism 8 includes: a second rotating frame 82, which is rotatably disposed on one side of the first support frame 11, and a pressing wheel 83 is rotatably disposed on its upper end; and a second linear drive 81, one end of which is hinged to the lower part of the frame 1, and the other end of which is hinged to the lower end of the second rotating frame 82.

[0036] The second linear actuator 81 of this application, with its double hinge structure, can maintain a stable support state after being clamped in place, has strong vibration resistance, and welding vibration will not cause the clamping mechanism 8 to loosen, resulting in high clamping stability.

[0037] Reference Figure 3The circular runout detection mechanism 9 includes: an elastic sheet 91, which is disposed below the steel pipe 6; a second support frame 92, which is disposed on the elastic sheet 91 and can support the steel pipe 6; and a distance sensor assembly 93, which is disposed below the elastic sheet 91 for detecting the fluctuation changes of the elastic sheet 91.

[0038] The sensor in this application does not directly contact the steel pipe 6, but indirectly collects deformation data through the elastic sheet 91. This effectively keeps the sensor away from the high temperature of welding above, the slag splash, and the dust pollution area, avoiding the sensor being burned by high temperature or damaged by welding slag, greatly reducing the sensor failure rate and extending the service life of the detection equipment.

[0039] Reference Figure 2 The first support frame 11 and the second support frame 92 are respectively equipped with a number of rollers 111 that can abut against the steel pipe 6.

[0040] This application uses roller 111 support to replace the traditional fixed support surface. The frictional resistance is greatly reduced when the steel pipe 6 rotates, avoiding the phenomenon of the steel pipe 6 getting stuck or constricted during rotation, ensuring that the rotary welding process is uniform and stable, and the weld formation is more uniform.

[0041] The specific workflow is as follows: 1. The entire device is mounted on the frame 1 as the core. The second rotary drive motor 32 and the worm gear reducer 31 cooperate to form the rotary drive mechanism 3. The second rotary drive motor 32 provides power, which is reduced and increased in torque by the worm gear reducer 31 to drive the first rotating frame 2 to rotate, so that the first rotating frame 2 has a stable rotation capability. The U-shaped steel 5 to be welded is transported to the card seat 41 at the end of the first rotating frame 2. The U-shaped steel 5 is pre-positioned by the groove on the card seat 41 that matches the shape of the U-shaped steel 5, so as to achieve the initial positioning and fixation of the workpiece.

[0042] 2. Start the first rotary drive motor 433. The motor drives the second bevel gear 432 to rotate. Through gear meshing, the first bevel gear 431 is driven to rotate, thereby controlling the switchable magnetic seat 42 inside the card holder 41 to switch to the magnetic attraction state. The switchable magnetic seat 42 generates magnetic attraction force, which firmly locks and fixes the pre-positioned U-shaped steel 5 inside the groove of the card holder 41. The groove achieves precise positioning of the shape, and the magnetic seat provides stable clamping force, ensuring that the U-shaped steel 5 can rotate synchronously with the first rotating frame 2. When unloading the workpiece, simply control the first rotary drive motor 433 to rotate in reverse. Through bevel gear transmission, the switchable magnetic seat 42 is demagnetized, which releases the fixed state of the U-shaped steel 5 and quickly completes the workpiece disassembly.

[0043] 3. Hoist the steel pipe 6 to be processed and place it stably on the support position of the device, so that the lower part of the steel pipe 6 rolls in contact with the rollers 111 on the first support frame 11 and the second support frame 92 respectively. The rollers 111 support the steel pipe 6 workpiece, effectively reducing the frictional resistance during the adjustment and rotation of the steel pipe 6. At the same time, the position of the steel pipe 6 is precisely adjusted so that the end of the steel pipe 6 is aligned with the side wall welding position of the U-shaped steel 5 on the card seat 41, thus completing the initial alignment and placement of the steel pipe 6.

[0044] 4. Start the clamping mechanism 7. The first linear driver 71 drives the push rod 72 to move forward linearly. The rotating block 73 at the end of the push rod 72 smoothly fits against the end face of the steel pipe 6 and continuously pushes the steel pipe 6 axially, so that the end face of the steel pipe 6 is tightly fitted against the welding position of the side wall of the U-shaped steel 5, completely eliminating the assembly gap at the joint between the steel pipe 6 and the U-shaped steel 5, and ensuring the welding accuracy.

[0045] 5. The second linear actuator 81 extends and drives the hinge structure to swing the second rotating frame 82 of the clamping mechanism 8. The clamping wheel 83 presses down and presses against the upper part of the steel pipe 6, pressing and limiting the steel pipe 6 on the roller 111 of the first support frame 11, restricting the radial up and down jump of the steel pipe 6, and preventing the steel pipe 6 from tilting upward during the welding process.

[0046] 6. Start the second rotary drive motor 32, which drives the first rotating frame 2 to rotate the U-shaped steel 5 at a low and uniform speed, indirectly driving the steel pipe 6 that is in contact with the joint to rotate synchronously with slight adjustments. If the steel pipe 6 itself has deformation defects such as bending or elliptic, the circular runout error of the outer wall of the steel pipe 6 will be transmitted to the second support frame 92 below, squeezing the bottom elastic sheet 91 to produce up and down fluctuation deformation. At this time, the distance measuring sensor component 93 below the elastic sheet 91 collects the deformation fluctuation data of the elastic sheet 91 in real time, accurately calculates the circular runout value of the steel pipe 6, and the staff judges the qualification of the workpiece based on the test results. If the circular runout value exceeds the tolerance, the placement posture of the steel pipe 6 is adjusted in time or a qualified steel pipe 6 is replaced, so as to avoid problems such as welding misalignment, uneven weld and welding defects caused by workpiece deformation from the source.

[0047] 7. After the runout of the steel pipe 6 is qualified and the workpiece docking accuracy meets the standard, keep the limit locking state of each clamping and tightening mechanism 7, and continue to run the second rotary drive motor 32 to drive the first rotating frame 2 to drive the U-shaped steel 5 to rotate in a uniform circle. At this time, the steel pipe 6 is double-constrained and fixed by the clamping mechanism 8 and the tightening mechanism 7, and the end face is always in close contact with the docking position of the side wall of the U-shaped steel 5, keeping it in a static state. The external welding gun is fixed in the welding position and remains stationary. The fully automatic circumferential welding operation at the docking point of the steel pipe 6 and the U-shaped steel 5 is completed by relying on the rotation of the workpiece, ensuring that the weld formation is uniform and the welding quality is stable.

[0048] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0050] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An auxiliary welding device for steel structure processing, characterized in that, include: Rack (1); The first rotating frame (2) and the rotation drive mechanism (3) are rotatably mounted on the frame (1) via the rotation drive mechanism (3); The fixing component (4) and the U-shaped steel (5) are detachably mounted on the end of the first rotating frame (2) away from the rotation drive mechanism (3) via the fixing component (4); The first support frame (11) and the steel pipe (6) are provided on one side of the first rotating frame (2). A clamping mechanism (7) is provided on one side of the first support frame (11) to clamp one end of the steel pipe (6) against the side wall of the U-shaped steel (5); A clamping mechanism (8) is provided on one side of the first support frame (11) for clamping the steel pipe (6) onto the first support frame (11); A circular runout detection mechanism (9) is set below the steel pipe (6) to detect the circular runout of the steel pipe (6).

2. The auxiliary welding device for steel structure processing according to claim 1, characterized in that, The fixing component (4) includes: Card holder (41) is located at the end of the first rotating frame (2) away from the rotary drive mechanism (3) and has a recessed groove adapted to the U-shaped steel (5); A switchable magnetic base (42) is disposed inside the card holder (41); A magnetic control assembly (43) is provided on the first rotating frame (2) for controlling the presence or absence of magnetic force on the switch-type magnetic base (42).

3. The auxiliary welding device for steel structure processing according to claim 2, characterized in that, The magnetic control component (43) includes: The first bevel gear (431) is located at the input end of the switch-type magnetic base (42); The second bevel gear (432) and the first rotary drive motor (433) are rotatably disposed on one side of the first bevel gear (431) through meshing with the first rotary drive motor (433).

4. The auxiliary welding device for steel structure processing according to claim 1, characterized in that, The rotary drive mechanism (3) includes: The worm gear reducer (31) has its output end connected to one end of the first rotating frame (2); The output end of the second rotary drive motor (32) is connected to the input end of the worm gear reducer (31).

5. The auxiliary welding device for steel structure processing according to claim 1, characterized in that, The clamping mechanism (7) includes a first linear actuator (71) and a push rod (72). The push rod (72) is disposed on one side of the first support frame (11) so that the steel pipe (6) can be pushed back and forth toward the side wall of the U-shaped steel (5) by the first linear actuator (71).

6. The auxiliary welding device for steel structure processing according to claim 5, characterized in that, The push rod (72) is rotatably provided with a rotating top block (73) at the end away from the first linear actuator (71).

7. The auxiliary welding device for steel structure processing according to claim 1, characterized in that, The clamping mechanism (8) includes: The second rotating frame (82) is rotatably disposed on one side of the first support frame (11), and a pressure wheel (83) is rotatably disposed on its upper end. The second linear actuator (81) has one end hinged to the bottom of the frame (1) and the other end hinged to the bottom of the second rotating frame (82).

8. The auxiliary welding device for steel structure processing according to claim 1, characterized in that, The circular runout detection mechanism (9) includes: An elastic sheet (91) is disposed below the steel pipe (6); The second support frame (92) is mounted on the elastic sheet (91) and can support the steel pipe (6); A ranging sensor assembly (93) is disposed below the elastic sheet (91) to detect fluctuations in the elastic sheet (91).

9. The auxiliary welding device for steel structure processing according to claim 8, characterized in that, The first support frame (11) and the second support frame (92) are respectively provided with a number of rollers (111) that can abut against the steel pipe (6).

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