A clamping and positioning device for steel structure welding

Abstract

The application provides a clamping and positioning device for steel structure welding, which comprises a base, a bottom plate arranged on the surface of the base, a driving rod rotatably connected to the side end of the bottom plate, a locking mechanism arranged in the base, a swing arm rotatably connected to the side end of the base, a slide rod connected to the swing arm through a lifting mechanism, a turnover mechanism fixedly connected to the top of the slide rod, a support plate slidably connected to the surface of a horizontal plate, a clamp table rotatably connected to the top of the support plate, and a stabilizing mechanism arranged on the surface of the clamp table. The steel structure is clamped and fixed on the bottom plate, the steel structure is conveyed through the rotatable swing arm, the steel structure is spliced by descending, the position of the steel structure is adjusted through the support plate arranged on the horizontal plate, the splicing and positioning at different angles are realized through the rotation of the horizontal plate and the support plate, the locking mechanism is arranged to avoid the collision between the bottom plate and the support plate, the steel structure is pressed and fixed after being clamped by the movable plate, the stable splicing between the steel structures is realized, and the clamping and positioning precision is improved.

Description

Technical Field

[0001] This invention relates to a clamping and positioning device for welding steel structures. Background Technology

[0002] Steel structures are one of the main types of building structures. They are mainly composed of steel beams, steel columns, steel trusses, and other components made of steel sections and plates. In steel structures, the components or parts are connected by welds, bolts, or rivets. Steel structures have the characteristics of high strength, light weight, strong deformability, good toughness, and high reliability. The application of steel structures in construction projects can effectively improve the performance of construction projects, save construction costs, and replace concrete structures with steel structures, which can reduce the amount of sand, stone, and cement used and reduce the damage to non-renewable resources. Summary of the Invention

[0003] Steel structures are structures made of steel materials and are one of the main types of building structures. They are mainly composed of steel beams, steel columns, steel trusses, and other components made of steel sections and plates, and are treated with rust removal and prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing. The components or parts are usually connected by welds, bolts, or rivets. Due to their light weight and simple construction, steel structures are widely used in large factories, stadiums, high-rise buildings, bridges, and other fields. They have a uniform structure, close to an isotropic homogeneous body, and their theoretical calculation results are consistent with the actual stress of steel structures. They also have a high modulus of elasticity, and steel structures have good plasticity and toughness, and can withstand vibration and impact loads. However, steel structures also have their limitations, such as poor corrosion resistance, requiring frequent maintenance, and poor fire resistance.

[0004] Steel structure is an important type of building structure. Most existing steel structures are connected by welding. When welding steel structures, the workpiece to be welded and the workpiece to be welded need to be closely fitted together before processing. It is difficult to stably clamp and position the workpiece during assembly. Moreover, collisions between the steel structure and the workpiece during assembly can easily cause positional deviations, making it difficult to achieve precise positioning and reducing the accuracy of subsequent welding. In particular, when clamping and fixing steel structures of different shapes, it is not easy to operate quickly and reduce welding processing efficiency. Summary of the Invention

[0006] In order to solve the technical problem of poor clamping and positioning stability during steel structure welding, the present invention provides a clamping and positioning device for steel structure welding.

[0007] To address the shortcomings of existing technologies, this application employs a base and a base plate to place the steel structure, and clamps and fixes the steel structure on the base plate to facilitate subsequent processing. A rotatable swing arm is used to transport another steel structure from the other side, and a horizontal plate is used to lower and move the steel structure to achieve splicing between the steel structures, facilitating subsequent welding processing.

[0008] To further address the problems in existing technologies: during steel structure splicing, the position of the steel structure can be adjusted by setting a support plate on the horizontal plate, and different angles of splicing and positioning can be achieved by rotating the horizontal plate and the support plate. At the same time, the rotation of the support plate can facilitate the clamping and transport of steel structures of different structures on the fixture table, which is beneficial to improving processing efficiency. In addition, the locking mechanism can prevent the bottom plate and the support plate from colliding, which can improve the safety performance of the device.

[0009] To further address the problems in the existing technology, a stable clamping of the steel structure is achieved by setting up a movable plate and a pressure block. After clamping with the movable plate, the steel structure is further pressed and fixed, and further limiting is achieved by the cooperation of the top block and the pressure block. This helps to improve the clamping stability of the steel structure, enables stable splicing between steel structures, and avoids deviation problems that affect welding accuracy.

[0010] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0011] This invention provides a clamping and positioning device for welding steel structures, the clamping and positioning device for welding steel structures comprising:

[0012] The base has a base plate on its surface, a clamping mechanism in the middle of the base plate, a drive rod rotatably connected to the side of the base plate, an insertion rod fixedly connected to the end of the drive rod, the insertion rod being inserted into the base, and a locking mechanism inside the base.

[0013] A swing arm is rotatably connected to the side of the base. A sliding rod is slidably connected inside the swing arm, and the sliding rod is connected to the swing arm through a lifting mechanism. The end of the sliding rod is rotatably connected to a horizontal plate. A flipping mechanism is fixedly connected to the top of the sliding rod, and the flipping mechanism is rotatably connected to the horizontal plate. A support plate is slidably connected to the surface of the horizontal plate. A clamping table is rotatably connected to the top of the support plate, and a stabilizing mechanism for clamping the steel structure is provided on the surface of the clamping table.

[0014] In this technical solution, two symmetrically distributed limiting plates are fixedly connected to the surface of the base, the bottom plate is located between the limiting plates, the top edge of the bottom plate is fixedly connected to a positioning plate located above the limiting plates, a mounting seat is provided on one side of the base, a drive motor is fixedly installed on the side wall of the mounting seat, and the output end of the drive motor is fixedly connected to the drive rod.

[0015] In this technical solution, the clamping mechanism includes a clamping motor, the output end of which is fixedly connected to a first lead screw, the first lead screw is rotatably connected to the inside of the base plate, and the two ends of the first lead screw have opposite spiral directions and are both threadedly connected to a sliding plate, the sliding plate is slidably connected to the inside of the base plate, and the top of the sliding plate is fixedly connected to a clamping plate located on the surface of the base plate.

[0016] In this technical solution, the locking mechanism includes a plug plate, which is movably sleeved with the two sides of the base. The surface of the plug plate has inclined grooves corresponding to the plug rod. The plug rod has an L-shaped cross-section and contacts the inclined surface of the inclined groove. One end of the plug rod is connected to the inside of the base through a first spring, and the other end of the plug rod extends to the outside of the base and is fitted into the inside of the swing arm. A control switch located between the first springs is fixedly connected inside the base. The control switch is correspondingly arranged on one side of the plug rod and electrically connected to the rotary motor.

[0017] In this technical solution, a rotary motor is fixedly installed on the side of the base. The output end of the rotary motor is fixedly connected to the swing arm. There are two swing arms, which are symmetrically distributed on both sides of the base. The bottom of each swing arm is fixedly connected to a lifting mechanism. The lifting mechanism includes a lifting motor and a second lead screw. The lifting motor is fixedly installed on the bottom side wall of the swing arm. The output end of the lifting motor is fixedly connected to a first gear. The second lead screw is rotatably connected to the inside of the swing arm. A second gear is fixedly connected to the bottom of the second lead screw, and the first gear and the second gear are meshed together.

[0018] In this technical solution, the flipping mechanism includes a flipping motor, which is fixedly installed on the top of the slide rod. The slide rod is slidably connected to the elongated hole of the swing arm, and the slide rod is threadedly connected to the second lead screw. The output end of the flipping motor is fixedly connected to the third gear, and the end of the cross plate is fixedly connected to the fourth gear, which meshes with the third gear.

[0019] In this technical solution, a side plate is fixedly connected to the side end of the horizontal plate, a translation motor is fixedly installed on the surface of the side plate, the output end of the translation motor is fixedly connected to a long screw, and both ends of the long screw are rotatably connected to the side plate. A sleeve is threaded onto the surface of the long screw, and the sleeve is fixedly connected to the outer wall of the guide plate. There are two guide plates, both of which have an L-shaped cross-section and are symmetrically distributed on both sides of the horizontal plate. The two guide plates are respectively fixedly connected to the bottom sides of the support plate.

[0020] In this technical solution, a fixed gear is rotatably connected inside the support plate, the fixed gear is fixedly connected to the bottom of the fixture table, a fixed plate is fixedly connected to the side end of the support plate, the side wall of the fixed plate is fixedly connected to the adjusting motor, the output end of the adjusting motor is fixedly connected to the threaded rod, and both ends of the threaded rod are rotatably connected to the inside of the fixed plate, the threaded rod is meshed with the transmission gear, the transmission gear is rotatably connected to the inside of one side of the support plate, and the transmission gear is meshed with the fixed gear.

[0021] In this technical solution, the stabilizing mechanism includes a first hydraulic cylinder and a second hydraulic cylinder. The first hydraulic cylinder is fixedly installed on both sides of the fixture table. A movable rod is fixedly connected to the telescopic end of the first hydraulic cylinder. The movable rod is slidably connected to the inside of the fixture table, and a movable plate is fixedly connected to the top of the movable rod. The second hydraulic cylinder is fixedly installed on the other two sides of the fixture table. The telescopic end of the second hydraulic cylinder is fixedly connected to a wedge block. A top block is vertically slidably connected to the middle of the fixture table, and the top block has inclined surfaces at both ends that fit with the wedge block.

[0022] In this technical solution, the movable plate is slidably connected to the surface of the fixture table. The movable plate has an L-shaped cross-section and a notch in the middle. A pressure rod located on one side of the notch is rotatably connected to the movable plate. One side of the top of the pressure rod is fixedly connected to the pressure block, and the other side of the top of the pressure rod is connected to the movable plate via a telescopic rod. The telescopic rod consists of two interlocking rods. The telescopic rod is connected to a fixed pipe via a flexible hose, and the fixed pipe is fixedly installed on the top of the first hydraulic cylinder. A guide rod is movably sleeved on the top of the fixed pipe. The guide rod is connected to the top of the fixed pipe via a second spring, and the other end of the guide rod is fixedly connected to a sealing plug. The sealing plug slides and seals inside the fixed pipe, and the sealing plug is correspondingly positioned above the connection between the flexible hose and the fixed pipe.

[0023] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0024] The positive and progressive effects of this invention are as follows:

[0025] The aforementioned clamping and positioning device for steel structure welding clamps and fixes the steel structure on a base plate. A rotatable swing arm transports the steel structure, and the lowering of the steel structure facilitates splicing. A support plate on a horizontal plate allows for adjustment of the steel structure's position, and rotation of the horizontal plate and support plate enables splicing and positioning at different angles. A locking mechanism prevents collisions between the base plate and support plate, ensuring stable clamping of the steel structure. Further clamping and fixing of the steel structure using a movable plate achieves stable splicing between steel structures and improves clamping and positioning accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0027] Figure 2 This is a front view structural diagram of the present invention.

[0028] Figure 3 This is a side view of the structure of the present invention.

[0029] Figure 4 This is a top view of the structure of the present invention.

[0030] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0031] Figure 6 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0032] Figure 7 For the present invention Figure 4 A magnified schematic diagram of the structure at point C.

[0033] Figure 8 This is a three-dimensional structural diagram of the insertion rod of the present invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the fixture table of the present invention.

[0035] Figure 10 This is a three-dimensional structural diagram of the horizontal plate of the present invention.

[0036] Figure 11 This is a three-dimensional structural diagram of the swing arm of the present invention.

[0037] Figure 12 This is a schematic diagram of the internal side view of the fixture table of the present invention.

[0038] Explanation of reference numerals in the attached figures

[0039] 100. Base; 101. Limiting plate; 102. Mounting seat; 103. Drive motor; 104. Drive rod; 105. Base plate; 106. Positioning plate; 107. Clamping motor; 108. First lead screw; 109. Slide plate; 110. Clamping plate; 111. Insert rod; 112. Insert plate; 113. Inclined groove; 114. First spring; 115. Control switch; 200. Swing arm; 201. Rotary motor; 202. Lifting motor; 203. First gear; 204. Second lead screw; 205. Second gear; 206. Slide rod; 207. Tilting motor; 208. Third gear; 209. Fourth gear; 300 301. Horizontal plate; 302. Side plate; 303. Translation motor; 304. Long screw; 305. Sleeve rod; 306. Guide plate; 307. Support plate; 308. Fixed plate; 309. Adjusting motor; 310. Threaded rod; 311. Fixed gear; 400. Transmission gear; 401. Fixture table; 402. First hydraulic cylinder; 403. Movable rod; 404. Movable plate; 405. Pressure rod; 406. Pressure block; 407. Telescopic rod; 408. Fixed tube; 409. Second spring; 410. Guide rod; 411. Sealing plug; 412. Hoses; 413. Top block; 414. Second hydraulic cylinder; 415. Wedge block. Detailed Implementation

[0040] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0041] like Figure 1-12 As shown, the clamping and positioning device for steel structure welding includes:

[0042] A base 100 has a base plate 105 on its surface. A clamping mechanism is provided in the middle of the base plate 105. A drive rod 104 is rotatably connected to the side end of the base plate 105. An insertion rod 111 is fixedly connected to the end of the drive rod 104. The insertion rod 111 is inserted into the base 100. A locking mechanism is provided inside the base 100.

[0043] A swing arm 200 is rotatably connected to the side of the base 100. A slide rod 206 is slidably connected inside the swing arm 200, and the slide rod 206 is connected to the swing arm 200 through a lifting mechanism. The end of the slide rod 206 is rotatably connected to a horizontal plate 300. A flipping mechanism is fixedly connected to the top of the slide rod 206, and the flipping mechanism is rotatably connected to the horizontal plate 300. A support plate 306 is slidably connected to the surface of the horizontal plate 300. A clamping table 400 is rotatably connected to the top of the support plate 306, and a stabilizing mechanism for clamping the steel structure is provided on the surface of the clamping table 400.

[0044] In this technical solution, two symmetrically distributed limiting plates 101 are fixedly connected to the surface of the base 100, the bottom plate 105 is located between the limiting plates 101, the top edge of the bottom plate 105 is fixedly connected to a positioning plate 106 located above the limiting plates 101, a mounting seat 102 is provided on one side of the base 100, a drive motor 103 is fixedly installed on the side wall of the mounting seat 102, and the output end of the drive motor 103 is fixedly connected to the drive rod 104.

[0045] In this technical solution, the clamping mechanism includes a clamping motor 107. The output end of the clamping motor 107 is fixedly connected to a first lead screw 108. The first lead screw 108 is rotatably connected to the inside of the base plate 105. The two ends of the first lead screw 108 have opposite spiral directions and are both threadedly connected to a sliding plate 109. The sliding plate 109 is slidably connected to the inside of the base plate 105. A clamping plate 110 located on the surface of the base plate 105 is fixedly connected to the top of the sliding plate 109.

[0046] In this technical solution, the locking mechanism includes a plug plate 112, which is movably sleeved with the inner sides of the base 100. The surface of the plug plate 112 is provided with inclined grooves 113 corresponding to the plug rod 111. The plug rod 111 has an L-shaped cross-section and contacts the inclined surface of the inclined groove 113. One end of the plug rod 111 is connected to the inside of the base 100 through a first spring 114. The other end of the plug rod 111 extends to the outside of the base 100 and is fitted into the swing arm 200. A control switch 115 is fixedly connected inside the base 100 between the first springs 114. The control switch 115 is correspondingly arranged on one side of the plug rod 111 and electrically connected to the rotary motor 201.

[0047] In this technical solution, a rotary motor 201 is fixedly installed on the side of the base 100. The output end of the rotary motor 201 is fixedly connected to the swing arm 200. There are two swing arms 200, which are symmetrically distributed on both sides of the base 100. The bottom of both swing arms 200 is fixedly connected to a lifting mechanism. The lifting mechanism includes a lifting motor 202 and a second lead screw 204. The lifting motor 202 is fixedly installed on the bottom side wall of the swing arm 200. The output end of the lifting motor 202 is fixedly connected to a first gear 203. The second lead screw 204 is rotatably connected to the inside of the swing arm 200. A second gear 205 is fixedly connected to the bottom of the second lead screw 204, and the first gear 203 and the second gear 205 are meshed together.

[0048] In this technical solution, the flipping mechanism includes a flipping motor 207, which is fixedly installed on the top of the slide rod 206. The slide rod 206 is slidably connected to the elongated hole of the swing arm 200, and the slide rod 206 is threadedly connected to the second lead screw 204. The output end of the flipping motor 207 is fixedly connected to the third gear 208, and the end of the horizontal plate 300 is fixedly connected to the fourth gear 209, which meshes with the third gear 208.

[0049] In this technical solution, a side plate 301 is fixedly connected to the side end of the horizontal plate 300. A translation motor 302 is fixedly installed on the surface of the side plate 301. The output end of the translation motor 302 is fixedly connected to a long screw 303, and both ends of the long screw 303 are rotatably connected to the side plate 301. A sleeve 304 is threaded onto the surface of the long screw 303. The sleeve 304 is fixedly connected to the outer wall of the guide plate 305. There are two guide plates 305. The cross-section of the two guide plates 305 is L-shaped and symmetrically distributed on both sides of the horizontal plate 300. The two guide plates 305 are respectively fixedly connected to the bottom sides of the support plate 306.

[0050] In this technical solution, a fixed gear 310 is rotatably connected inside the support plate 306. The fixed gear 310 is fixedly connected to the bottom of the fixture table 400. A fixed plate 307 is fixedly connected to the side end of the support plate 306. The side wall of the fixed plate 307 is fixedly connected to the adjusting motor 308. The output end of the adjusting motor 308 is fixedly connected to the threaded rod 309. Both ends of the threaded rod 309 are rotatably connected to the inside of the fixed plate 307. The threaded rod 309 is meshed with the transmission gear 311. The transmission gear 311 is rotatably connected to the inside of one side of the support plate 306. The transmission gear 311 is also meshed with the fixed gear 310.

[0051] In this technical solution, the stabilizing mechanism includes a first hydraulic cylinder 401 and a second hydraulic cylinder 413. The first hydraulic cylinder 401 is fixedly installed on both sides of the fixture table 400. The telescopic end of the first hydraulic cylinder 401 is fixedly connected to a movable rod 402. The movable rod 402 is slidably connected to the inside of the fixture table 400, and a movable plate 403 is fixedly connected to the top of the movable rod 402. The second hydraulic cylinder 413 is fixedly installed on the other two sides of the fixture table 400. The telescopic end of the second hydraulic cylinder 413 is fixedly connected to a wedge block 414. A top block 412 is vertically slidably connected to the middle of the fixture table 400, and the top block 412 has inclined surfaces at both ends that fit against the wedge block 414.

[0052] In this technical solution, the movable plate 403 is slidably connected to the surface of the fixture table 400. The movable plate 403 has an L-shaped cross-section and a notch in the middle. A pressure rod 404 located on one side of the notch is rotatably connected to the movable plate 403. One top side of the pressure rod 404 is fixedly connected to the pressure block 405, and the other top side of the pressure rod 404 is connected to the movable plate 403 via a telescopic rod 406. The telescopic rod 406 consists of two interlocking rods. The hose 411 is connected to the fixed tube 407, and the fixed tube 407 is fixedly installed on the top of the first hydraulic cylinder 401. The top of the fixed tube 407 is movably sleeved with a guide rod 409. The guide rod 409 is connected to the top of the fixed tube 407 through a second spring 408. The other end of the guide rod 409 is fixedly connected to a sealing plug 410. The sealing plug 410 slides and seals the inside of the fixed tube 407. The sealing plug 410 is correspondingly positioned above the connection between the hose 411 and the fixed tube 407.

[0053] In use, the workpiece to be welded is placed on the base plate 105. The clamping motor 107 is started, driving the first lead screw 108 to rotate. When the first lead screw 108 moves the slide plate 109, the workpiece is clamped on the surface of the base plate 105. Then, the drive motor 103 is started, causing it to drive the drive rod 104 to rotate on the mounting base 102. During the process of rotating the base plate 105 from one side of the mounting base 102 to the other side, the base plate 105 remains horizontal. When the base plate 105 moves to the surface of the base 100, the base plate 105 is positioned between the limiting plates 101, and the positioning plate 106 moves to the top surface of the limiting plate 101 to achieve limitation. At this time, the drive rod 104... The insertion rod 111 is moved into the base 100 and contacts the inner wall of the inclined groove 113 of the insertion plate 112, so that the insertion plate 112 separates from the swing arm 200 when it moves inside the base 100, and the insertion plate 112 abuts against the control switch 115. The control switch 115 connects the circuit of the rotary motor 201, so that the rotary motor 201 is started. At this time, the drive rod 104 is in a horizontal state and the swing arm 200 is rotated, so that it drives the swing arm 200 to rotate around the base 100, so that the swing arm 200 holding another workpiece rotates to the corresponding position, so as to facilitate the workpiece to be lowered on the swing arm 200 and contact the workpiece on the base plate 105, so as to realize the subsequent welding process.

[0054] When fixing the workpiece, the first hydraulic cylinder 401 is activated, driving the movable rod 402 to move inside the fixture table 400. The movable rod 402 drives the movable plate 403 to move, clamping the side wall of the workpiece. At this time, the movable plate 403 clamps the workpiece, and the hydraulic oil pressure of the first hydraulic cylinder 401 pushes up the sealing plug 410. When the sealing plug 410 drives the guide rod 409 to move, the second spring 408 is compressed, causing the sealing plug 410 to separate from the interface of the hose 411. At this time, some hydraulic oil enters the telescopic rod 406, causing the telescopic rod 406 to extend and push the pressure rod 404 to rotate, which in turn drives the pressure block 4. 05. After clamping and fixing the workpiece to improve its stability, the second hydraulic cylinder 413 is activated. This cylinder moves the wedge block 414 inside the fixture table 400, causing it to contact the top block 412 and push it upward. The workpiece is clamped and fixed by the cooperation of the top block 412 and the pressure block 405, further improving the clamping stability of the fixture. When the insert plate 112 separates from the swing arm 200, the swing arm 200 rotates the workpiece and drives the third gear 208 to rotate via the flip motor 207. This causes the third gear 208 to drive the fourth gear 209 and the cross plate. After the workpiece angle is adjusted by rotating around the slide bar 206, the translation motor 302 is started. When the translation motor 302 drives the long screw 303 to rotate, it drives the sleeve rod 304 to translate, causing the sleeve rod 304 to slide on the guide plate 305 and support plate 306 on the surface of the horizontal plate 300. This, in turn, moves the workpiece to adjust its position. Then, the adjusting motor 308 drives the threaded rod 309 to rotate, which, through the transmission gear 311 and the fixed gear 310, drives the fixture table 400 to rotate, thus adjusting the workpiece angle. After adjustment, the lifting motor 202 is started, allowing it to... The transmission of the first gear 203 and the second gear 205 drives the second lead screw 204 to rotate inside the swing arm 200, which in turn drives the slide rod 206 to descend. The slide rod 206 then drives the horizontal plate 300, the support plate 306, and the fixture table 400 to descend. At this time, the fixture table 400 is flipped by the flipping motor 207, so that the workpiece moves to the workpiece on the base plate 105 and they come into contact with each other for welding. The workpiece can be adjusted appropriately according to the welding position and angle. The rotation of the drive rod 104 and the swing arm 200 facilitates the sequential loading of workpieces, and the workpieces can be unloaded quickly after welding, which helps to improve welding efficiency.

[0055] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A clamping and positioning device for welding steel structures, characterized in that, The clamping and positioning device for steel structure welding includes: A base (100) is provided with a base plate (105) on its surface. A clamping mechanism is provided in the middle of the base plate (105). A drive rod (104) is rotatably connected to the side end of the base plate (105). A plug rod (111) is fixedly connected to the end of the drive rod (104). The plug rod (111) is inserted into the base (100). A locking mechanism is provided inside the base (100). The locking mechanism includes a plug plate (112), which is movably sleeved with the two sides of the base (100). The surface of the plug plate (112) is provided with inclined grooves (113) corresponding to the plug rod (111). The plug rod (111) has an L-shaped cross-section and contacts the inclined surface of the inclined groove (113). One end of the plug rod (111) is connected to the inside of the base (100) through a first spring (114). The other end of the plug rod (111) extends to the outside of the base (100) and is fitted into the swing arm (200). A control switch (115) located between the first springs (114) is fixedly connected inside the base (100). The control switch (115) is correspondingly arranged on one side of the plug rod (111) and electrically connected to the rotary motor (201). A swing arm (200) is rotatably connected to the side end of the base (100). A slide rod (206) is slidably connected inside the swing arm (200). The slide rod (206) is connected to the swing arm (200) through a lifting mechanism. The end of the slide rod (206) is rotatably connected to the horizontal plate (300). A flipping mechanism is fixedly connected to the top of the slide rod (206). The flipping mechanism is rotatably connected to the horizontal plate (300). A support plate (306) is slidably connected to the surface of the horizontal plate (300). A clamping table (400) is rotatably connected to the top of the support plate (306). A stabilizing mechanism for clamping the steel structure is provided on the surface of the clamping table (400). The stabilizing mechanism includes a first hydraulic cylinder (401) and a second hydraulic cylinder (413). The first hydraulic cylinder (401) is fixedly installed on both sides of the fixture table (400). The telescopic end of the first hydraulic cylinder (401) is fixedly connected to a movable rod (402). The movable rod (402) is slidably connected to the inside of the fixture table (400), and a movable plate (403) is fixedly connected to the top of the movable rod (402). The second hydraulic cylinder (413) is fixedly installed on the other two sides of the fixture table (400). The telescopic end of the second hydraulic cylinder (413) is fixedly connected to a wedge block (414). A top block (412) is vertically slidably connected in the middle of the fixture table (400), and the top block (412) has inclined surfaces at both ends that fit against the wedge block (414). The movable plate (403) is slidably connected to the surface of the fixture table (400). The movable plate (403) has an L-shaped cross-section and a notch in the middle. A pressure rod (404) located on one side of the notch is rotatably connected to the movable plate (403). One side of the top of the pressure rod (404) is fixedly connected to the pressure block (405), and the other side of the top of the pressure rod (404) is connected to the movable plate (403) via a telescopic rod (406). The telescopic rod (406) consists of two interlocking rods. The telescopic rod (406) is connected to the movable plate (403) via a flexible hose (41). 1) Connected to the fixed tube (407), and the fixed tube (407) is fixedly installed on the top of the first hydraulic cylinder (401). The top of the fixed tube (407) is movably sleeved with a guide rod (409). The guide rod (409) is connected to the top of the fixed tube (407) through a second spring (408). The other end of the guide rod (409) is fixedly connected to a sealing plug (410). The sealing plug (410) slides and seals inside the fixed tube (407). The sealing plug (410) is correspondingly positioned above the connection between the hose (411) and the fixed tube (407).

2. The clamping and positioning device for steel structure welding as described in claim 1, characterized in that: The base (100) has two symmetrically distributed limiting plates (101) fixedly connected to its surface. The bottom plate (105) is located between the limiting plates (101). The top edge of the bottom plate (105) is fixedly connected to a positioning plate (106) located above the limiting plates (101). The base (100) has a mounting seat (102) on one side. The mounting seat (102) has a drive motor (103) fixedly installed on its side wall. The output end of the drive motor (103) is fixedly connected to the drive rod (104).

3. The clamping and positioning device for steel structure welding as described in claim 1, characterized in that: The clamping mechanism includes a clamping motor (107), the output end of which is fixedly connected to a first lead screw (108), the first lead screw (108) is rotatably connected to the inside of the base plate (105), and the two ends of the first lead screw (108) have opposite spiral directions and are threadedly connected to a sliding plate (109), the sliding plate (109) is slidably connected to the inside of the base plate (105), and the top of the sliding plate (109) is fixedly connected to a clamping plate (110) located on the surface of the base plate (105).

4. The clamping and positioning device for steel structure welding as described in claim 1, characterized in that: A rotary motor (201) is fixedly installed on the side of the base (100). The output end of the rotary motor (201) is fixedly connected to the swing arm (200). There are two swing arms (200), which are symmetrically distributed on both sides of the base (100). The bottom of both swing arms (200) is fixedly connected to the lifting mechanism. The lifting mechanism includes a lifting motor (202) and a second lead screw (204). The lifting motor (202) is fixedly installed on the bottom side wall of the swing arm (200). The output end of the lifting motor (202) is fixedly connected to the first gear (203). The second lead screw (204) is rotatably connected to the inside of the swing arm (200). The bottom of the second lead screw (204) is fixedly connected to the second gear (205), and the first gear (203) and the second gear (205) are meshed together.

5. The clamping and positioning device for steel structure welding as described in claim 4, characterized in that: The flipping mechanism includes a flipping motor (207), which is fixedly installed on the top of the slide rod (206). The slide rod (206) is slidably connected to the elongated hole of the swing arm (200), and the slide rod (206) is threadedly connected to the second lead screw (204). The output end of the flipping motor (207) is fixedly connected to the third gear (208). The end of the horizontal plate (300) is fixedly connected to the fourth gear (209), which meshes with the third gear (208).

6. The clamping and positioning device for steel structure welding as described in claim 1, characterized in that: A side plate (301) is fixedly connected to the side end of the horizontal plate (300). A translation motor (302) is fixedly installed on the surface of the side plate (301). The output end of the translation motor (302) is fixedly connected to a long screw (303). Both ends of the long screw (303) are rotatably connected to the side plate (301). A sleeve rod (304) is threaded onto the surface of the long screw (303). The sleeve rod (304) is fixedly connected to the outer wall of the guide plate (305). There are two guide plates (305). The cross-section of the two guide plates (305) is L-shaped and symmetrically distributed on both sides of the horizontal plate (300). The two guide plates (305) are fixedly connected to the bottom sides of the support plate (306) respectively.

7. The clamping and positioning device for steel structure welding as described in claim 1, characterized in that: A fixed gear (310) is rotatably connected inside the support plate (306). The fixed gear (310) is fixedly connected to the bottom of the fixture table (400). A fixed plate (307) is fixedly connected to the side end of the support plate (306). The side wall of the fixed plate (307) is fixedly connected to the adjusting motor (308). The output end of the adjusting motor (308) is fixedly connected to the threaded rod (309). Both ends of the threaded rod (309) are rotatably connected to the inside of the fixed plate (307). The threaded rod (309) is meshed with the transmission gear (311). The transmission gear (311) is rotatably connected to the inside of one side of the support plate (306). The transmission gear (311) is meshed with the fixed gear (310).

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