A welding fixture for building construction

Abstract

This invention relates to the field of welding technology in building engineering, specifically to a welding fixture for building engineering, comprising: a conversion mechanism on the upper side of a base plate and an adjustment mechanism located outside the conversion mechanism, with a locking mechanism on the adjustment mechanism; this invention enables stable positioning and precise docking of steel sections with different cross-sections through rapid structural transformation of the welding fixture, allowing the same welding fixture to be adapted to various cross-sectional shapes of steel such as H-beams, U-beams, square tubes, and angle steel, while also possessing dimensional adjustment capabilities to meet the processing requirements of steel sections with different specifications and sizes. This not only significantly reduces equipment investment and warehousing management costs, but also greatly improves the production line's rapid response capability to steel sections with different cross-sections, while providing effective technical support for multi-variety, small-batch production modes; it can also be adaptively adjusted according to the cross-sectional profile of different steel sections to ensure stable locking onto the positioning welding fixture.

Description

Technical Field

[0001] This invention relates to the field of welding technology in building engineering, specifically to a welding fixture for building engineering. Background Technology

[0002] In the field of construction engineering, welding fixtures are key process equipment in the fabrication and installation of steel structures. Their core function is to accurately position, reliably clamp, stably support, or flexibly rotate the weldment, thereby effectively ensuring the accuracy, quality, efficiency, and safety of welding operations. Since steel mills produce various types of profiles, such as H-beams, U-beams, and square tubes, they are usually shipped in fixed standard lengths due to production processes and transportation conditions. However, actual building structures often require continuous components with larger spans in their design. Therefore, welding fixtures are commonly used in construction engineering to perform end-to-end welding operations on multiple standard profiles to obtain integral components that meet the design length and mechanical performance requirements.

[0003] In existing technologies, to achieve end butt welding of standard length steel, it is usually necessary to use special welding fixtures that match the cross-sectional shape of the steel. During operation, two identical steel pieces to be spliced ​​are clamped onto the special limiting welding fixture to accurately position and rigidly lock the steel, while ensuring that the butt joint ends are flat and aligned and maintain a preset gap. Finally, the joint is welded by welding equipment to complete the firm connection between the two and form an integral component that meets the design requirements.

[0004] However, the traditional method of butt welding steel with different cross-sectional shapes has the following problems: In the existing technology, special welding fixtures are required for butt welding of steel with different cross-sections. This not only significantly increases the initial investment cost of special welding fixtures in the construction process, but also leads to increased storage costs and complicated management and maintenance due to the wide variety of welding fixtures. At the same time, when switching to welding different cross-section steels during the welding process, the welding fixtures need to be completely changed and readjusted, which not only prolongs the production downtime and affects the overall production efficiency, but also makes it difficult for welding processing to adapt to the production needs of multiple varieties and small batches. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for building engineering, comprising a base plate, wherein a conversion mechanism and an adjustment mechanism located outside the conversion mechanism are provided on the upper side of the base plate, and a locking mechanism is provided on the adjustment mechanism.

[0006] The conversion mechanism includes a lateral adjustment part disposed on the upper side of the base plate for left and right movement adjustment. The lateral adjustment part is provided with a docking positioning part. The docking positioning part is provided with an adjustment limiting part that adapts to the stable positioning and precise docking requirements of various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel through structural conversion adjustment, and a support and reinforcement part that supports and reinforces the adjustment limiting part. The adjustment limiting part is provided with a locking part that cooperates with the docking positioning part to stably lock the adjustment limiting part.

[0007] The adjustment mechanism includes a lifting adjustment part disposed on the upper side of the base plate for vertical movement adjustment, and the lifting adjustment part is provided with an adjustment drive part.

[0008] The locking mechanism includes a driven adjustment part that is mounted on the adjustment drive part and moves left and right in coordination with the adjustment drive part. The driven adjustment part is provided with a butt locking part that is adapted to lock various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel in coordination with the adjustment limit part.

[0009] Preferably, the lateral adjustment unit includes guide rails symmetrically fixedly mounted on the upper side of the base plate, and electric sliders that move left and right symmetrically mounted on the guide rails. A moving platform is fixedly mounted on the upper side of the symmetrical electric sliders.

[0010] Preferably, the docking positioning part includes a positioning seat symmetrically fixed on the upper side of the moving platform. The positioning seat has a through-rotating groove. The positioning seat has a first positioning groove through-rotating groove on the lower side of the rotating groove and on the side near the center of the guide rail. The positioning seat has a second positioning groove through-rotating groove on the upper side of the rotating groove.

[0011] Preferably, the adjusting limiting part includes an L-shaped limiting platform rotatably disposed between two positioning seats. The L-shaped limiting platform has symmetrically fixed rotating shafts on its front and rear sides that are rotatably connected to the corresponding rotating grooves. A knob is fixedly disposed on the side of the rotating shaft away from the L-shaped limiting platform. The horizontal and vertical sections of the L-shaped limiting platform are symmetrically provided with threaded grooves that mate with positioning groove one and positioning groove two.

[0012] Preferably, the locking part includes a stud with an internal threaded connection in the threaded groove, a pin fixedly provided on the side of the stud near the corresponding positioning seat, which is engaged with positioning groove one and positioning groove two, and a hexagonal head fixedly provided on the side of the pin away from the stud, which is used to assemble with an external hexagonal wrench.

[0013] Preferably, the support and reinforcement part includes a cylinder fixedly installed on the lower side of the moving platform. The telescopic end of the cylinder is fixedly provided with a reinforcement platform that moves up and down. The lower side of the reinforcement platform is symmetrically provided with guide rods that are slidably connected to the moving platform. The opposite sides of the two reinforcement platforms are both inclined surfaces.

[0014] Preferably, the lifting adjustment unit includes a fixed platform fixedly mounted on the upper side of the base plate by multiple support columns. A second cylinder is symmetrically fixedly mounted on the upper side of the fixed platform. A U-shaped lifting platform that moves up and down is fixedly mounted on the telescopic end of the second cylinder. A second guide rod that is slidably connected to the fixed platform is symmetrically fixedly mounted on the upper side of the U-shaped lifting platform.

[0015] Preferably, the adjustment drive unit includes a motor fixedly installed on the right side of the U-shaped lifting platform, and a bidirectional screw fixedly installed at the drive end of the motor, which is rotatably connected to the U-shaped lifting platform. Guide rods are symmetrically fixedly installed on the inner side of the U-shaped lifting platform and on both the front and rear sides of the bidirectional screw.

[0016] Preferably, the driven adjustment part includes slide blocks that are symmetrically slidably disposed on the guide rod three and can move left and right. An adjustment plate is fixedly disposed on the lower side of the front and rear symmetrical slide blocks. A threaded seat that is threadedly connected to the corresponding bidirectional screw is fixedly disposed on the upper side of the adjustment plate and located between the two slide blocks.

[0017] Preferably, the docking locking part includes a locking block fixedly disposed on the lower side of the adjusting plate. The lower end of the locking block is provided with inclined surfaces for locking the angle steel symmetrically on the left and right. The lower side of the locking block is provided with a V-shaped groove that runs through the front and back and locks the square tube.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention, through the cooperation of the conversion mechanism, adjustment mechanism and locking mechanism, can achieve stable positioning and precise docking of steel sections with different cross-sections by rapidly changing the structure of the welding fixture. The same set of welding fixtures can be adapted to steel materials with various cross-sectional shapes such as H-beams, U-beams, square tubes and angle steels. At the same time, it also has the ability to adjust the size to meet the processing needs of steel sections with different specifications and sizes. This not only significantly reduces equipment investment and warehousing management costs, but also greatly improves the production line's ability to quickly change the shape of steel sections with different cross-sections. At the same time, it provides effective technical support for multi-variety, small-batch production mode.

[0019] 2. Through the cooperation of conversion mechanism, adjustment mechanism and locking mechanism, this invention can also make adaptive adjustments according to the cross-sectional profile of different steel sections to ensure that they are stably locked on the limiting welding fixture. This provides reliable rigid support and locking for various cross-sectional steel sections during the welding process, effectively controls the offset of the steel section joint, and ensures the stability of the steel section end splicing. At the same time, it maintains the high precision of the joint, so that the welded joints of steel sections with different cross-sections can meet the specified welding precision standards. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the conversion mechanism.

[0022] Figure 3 This is a partial structural diagram of the lateral adjustment section.

[0023] Figure 4 A schematic diagram of the structure of the adjustable limiting part.

[0024] Figure 5 This is a partial cross-sectional schematic diagram of the locking section.

[0025] Figure 6 This is a partial cross-sectional schematic diagram of the support and reinforcement section.

[0026] Figure 7 This is a partial cross-sectional schematic diagram of the adjustment mechanism.

[0027] Figure 8 This is a partial cross-sectional schematic diagram of the adjustment drive section.

[0028] Figure 9 This is a schematic diagram of the locking mechanism.

[0029] Figure 10 This is a schematic diagram of the assembly and positioning of H-beams.

[0030] Figure 11 A schematic diagram of the assembly and positioning of the U-shaped steel.

[0031] Figure 12 This is a schematic diagram of the assembly and positioning of the square tube.

[0032] Figure 13 This is a schematic diagram of the angle steel assembly and positioning.

[0033] In the diagram: 1. Base plate; 2. Conversion mechanism; 21. Lateral adjustment section; 211. Guide rail; 212. Electric slider; 213. Moving table; 22. Docking and positioning section; 221. Positioning seat; 222. Rotary groove; 223. Positioning groove one; 224. Positioning groove two; 23. Adjustment and limiting section; 231. L-shaped limiting platform; 232. Rotating shaft; 233. Knob; 234. Threaded groove; 24. Locking section; 241. Stud; 242. Pin; 243. Hexagonal head; 25. Support and reinforcement section; 25 1. Cylinder 1; 252. Reinforcing Platform; 253. Guide Rod 1; 3. Adjustment Mechanism; 31. Lifting Adjustment Unit; 311. Fixed Platform; 312. Cylinder 2; 313. U-shaped Lifting Platform; 314. Guide Rod 2; 32. Adjustment Drive Unit; 321. Motor; 322. Bidirectional Screw; 323. Guide Rod 3; 4. Locking Mechanism; 41. Driven Adjustment Unit; 411. Slide; 412. Adjustment Plate; 413. Threaded Seat; 42. Connecting Locking Unit; 421. Locking Block; 422. V-groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1 A welding fixture for building construction includes a base plate 1, a conversion mechanism 2 and an adjustment mechanism 3 located outside the conversion mechanism 2 on the upper side of the base plate 1, and a locking mechanism 4 on the adjustment mechanism 3.

[0036] Please see Figure 1 and Figure 2 The conversion mechanism 2 includes a horizontal adjustment part 21 disposed on the upper side of the base plate 1 for left and right movement adjustment. The horizontal adjustment part 21 is provided with a docking positioning part 22. The docking positioning part 22 is provided with an adjustment limiting part 23 that adapts to the stable positioning and precise docking requirements of various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel through structural conversion adjustment, and a support and reinforcement part 25 that supports and reinforces the adjustment limiting part 23. The adjustment limiting part 23 is provided with a locking part 24 that cooperates with the docking positioning part 22 to stably lock the adjustment limiting part 23.

[0037] Please see Figure 2 and Figure 3 The lateral adjustment unit 21 includes a guide rail 211 symmetrically fixed on the upper side of the base plate 1, and an electric slider 212 symmetrically slidably mounted on the guide rail 211 for left and right movement. A moving platform 213 is fixedly mounted on the upper side of the symmetrical electric sliders 212.

[0038] Please see Figure 2 and Figure 3 The docking positioning part 22 includes a positioning seat 221 symmetrically fixed on the upper side of the moving platform 213. The positioning seat 221 has a through-rotating groove 222. The positioning seat 221 has a first positioning groove 223 through-rotating groove 223 on the lower side of the through-rotating groove 222 and on the side near the center of the guide rail 211. The positioning seat 221 has a second positioning groove 224 through-rotating groove 224 symmetrically on the left and right sides above the through-rotating groove 222.

[0039] The electric slider 212 can drive the corresponding moving platform 213 to move left and right along the guide rail 211 for adjustment, and the moving platform 213 will then drive the corresponding positioning seat 221 to move and adjust synchronously.

[0040] Please see Figure 2 , Figure 4 and Figure 5The adjusting limiting part 23 includes an L-shaped limiting platform 231 rotatably disposed between two positioning seats 221. The L-shaped limiting platform 231 has symmetrically fixed rotating shafts 232 on its front and rear sides, which are rotatably connected to the corresponding rotating grooves 222. A knob 233 is fixedly disposed on the side of the rotating shaft 232 away from the L-shaped limiting platform 231. The horizontal and vertical sections of the L-shaped limiting platform 231 are symmetrically provided with threaded grooves 234 that cooperate with the positioning groove 1 223 and the positioning groove 224.

[0041] Please see Figure 2 , Figure 4 and Figure 5 The locking part 24 includes a stud 241 with an internal thread connection to the threaded groove 234. A pin 242 is fixedly provided on the side of the stud 241 near the corresponding positioning seat 221, which is engaged with the positioning groove 1 223 and the positioning groove 224. A hexagonal head 243 is fixedly provided on the side of the pin 242 away from the stud 241, which is used to assemble with an external hexagonal wrench (not shown in the figure).

[0042] When using the L-shaped limiting platform 231 to stably limit the movement of H-beams or U-beams, first use the knob 233 to rotate and adjust the shaft 232 and the L-shaped limiting platform 231 until the longitudinal extension of the L-shaped limiting platform 231 is completely vertical and located below the transverse extension. Simultaneously, the transverse extensions of the two symmetrical L-shaped limiting platforms 231 are completely horizontal and located on opposite sides of the two vertical sections (e.g., ...). Figure 10 and Figure 11 As shown), at this time, the threaded groove 234 on the L-shaped limiting platform 231 is exactly aligned with the corresponding positioning groove 223. Then, using an external hex wrench and hex head 243, the stud 241 is threaded into the corresponding threaded groove 234. The pin 242 is simultaneously inserted and positioned in the corresponding positioning groove 223, thereby stably locking the L-shaped limiting platform 231 in the current state. Next, the horizontal sections of two H-beams or U-beams are placed on the upper side of the horizontal sections of the two symmetrical L-shaped limiting platforms 231, and the vertical sections of the H-beams or U-beams are placed outside the vertical sections of the corresponding L-shaped limiting platforms 231. At the same time, the ends of the two H-beams or U-beams are stably connected. Then, the electric slider 212 drives the two moving platforms 213 to move in opposite directions. The positioning seat 221 then drives the two symmetrical L-shaped limiting platforms 231 to move in opposite directions synchronously until the vertical section of the L-shaped limiting platform 231 is stably attached to the corresponding vertical section on the H-beam or U-beam (e.g., Figure 10 or Figure 11 As shown), this provides stable support and limiting for the two H-beams or U-beams, and in conjunction with the locking mechanism 4, it can stably lock and position the H-beams or U-beams on the L-shaped limiting platform 231.

[0043] When adjusting the L-shaped limiting platform 231 to stabilize and limit the square tube or angle steel, first use the knob 233 to rotate the shaft 232 and the L-shaped limiting platform 231 until the opening of the L-shaped limiting platform 231 faces upward and the longitudinal extension section and the transverse extension section are symmetrically distributed (e.g., Figure 12 or Figure 13 As shown), at this time, the threaded groove 234 on the L-shaped limiting platform 231 is exactly aligned with the corresponding positioning groove 224. Then, using an external hex wrench and hex head 243, the stud 241 is threaded into the corresponding threaded groove 234. The pin 242 is simultaneously inserted and positioned in the corresponding positioning groove 224, thereby stably locking the L-shaped limiting platform 231 in the current state. Next, the right-angled ends of the two square tubes or angle steels are placed in the upward-facing opening of the corresponding single L-shaped limiting platform 231, and the ends of the two square tubes or angle steels are stably connected. Thus, the two extensions of the L-shaped limiting platform 231 stably limit and support the square tubes or angle steels (e.g., Figure 12 or Figure 13 As shown in the figure, and in conjunction with the locking mechanism 4, the square tube or angle steel can be stably locked and positioned on the L-shaped limiting platform 231.

[0044] The above-described operation method enables stable positioning and precise docking of steel sections with different cross-sections through rapid structural changes in the welding fixture. This allows the same welding fixture to be adapted to various cross-sectional shapes of steel, including H-beams, U-beams, square tubes, and angle steel. It also has the ability to adjust the size to meet the processing requirements of steel sections with different specifications and dimensions. This not only significantly reduces equipment investment and warehousing management costs but also greatly improves the production line's ability to quickly change to different cross-section steel sections. Furthermore, it provides effective technical support for multi-variety, small-batch production models.

[0045] Please see Figure 2 and Figure 6 The support and reinforcement part 25 includes a cylinder 251 fixedly installed on the lower side of the moving platform 213. The telescopic end of the cylinder 251 is fixedly installed with a reinforcement platform 252 that moves up and down. The reinforcement platform 252 is symmetrically fixedly installed with guide rods 253 that are slidably connected to the moving platform 213 on the lower side. The opposite sides of the two reinforcement platforms 252 are both inclined surfaces.

[0046] When the H-beam or U-beam is stably limited by the two symmetrical L-shaped limiting platforms 231, the cylinder 251 drives the reinforcing platform 252 to move upward until the upper surface of the reinforcing platform 252 is in contact with the lower surface of the corresponding horizontal section of the L-shaped limiting platform 231 (e.g., Figure 10 or Figure 11 As shown in the figure, the L-shaped limiting platform 231 supporting and limiting H-shaped steel or U-shaped steel is supported and reinforced by the reinforcing platform 252, which to a certain extent prevents the L-shaped limiting platform 231 from bending and deforming downward during the supporting and limiting process.

[0047] When the L-shaped limiting platform 231 is used to stably limit the square tube or angle steel, the cylinder 251 drives the reinforcing platform 252 to move upward until the inclined surface on the reinforcing platform 252 is in contact with the lower side of the corresponding extension of the L-shaped limiting platform 231 (e.g., Figure 12 or Figure 13 As shown in the figure, the L-shaped limiting platform 231 supporting the limiting square tube or angle steel is supported and reinforced by the reinforcing platform 252, which to a certain extent prevents the L-shaped limiting platform 231 from bending and deforming downward during the supporting and limiting process.

[0048] Please see Figure 1 The adjustment mechanism 3 includes a lifting adjustment part 31 disposed on the upper side of the base plate 1 and used for vertical movement adjustment, and an adjustment drive part 32 is disposed on the lifting adjustment part 31.

[0049] Please see Figure 1 and Figure 7 The lifting adjustment unit 31 includes a fixed platform 311 fixedly mounted on the upper side of the base plate 1 by multiple support columns. A second cylinder 312 is symmetrically fixedly mounted on the upper side of the fixed platform 311. A U-shaped lifting platform 313 that moves up and down is fixedly mounted on the telescopic end of the second cylinder 312. A second guide rod 314 that is slidably connected to the fixed platform 311 is symmetrically fixedly mounted on the upper side of the U-shaped lifting platform 313.

[0050] Please see Figure 1 , Figure 7 and Figure 8 The adjustment drive unit 32 includes a motor 321 fixedly installed on the right side of the U-shaped lifting platform 313. The drive end of the motor 321 is fixedly provided with a bidirectional screw 322 that is rotatably connected to the U-shaped lifting platform 313. Guide rods 323 are symmetrically fixedly installed on the inner side of the U-shaped lifting platform 313 and on the front and rear sides of the bidirectional screw 322.

[0051] The cylinder 312 can drive the U-shaped lifting platform 313 to move up and down for adjustment. The U-shaped lifting platform 313 then drives the corresponding motor 321, bidirectional screw 322 and guide rod 323 to move up and down synchronously for adjustment.

[0052] Please see Figure 1 and Figure 7 The locking mechanism 4 includes a driven adjustment part 41 disposed on the adjustment drive part 32 and used to adjust left and right movement in conjunction with the adjustment drive part 32. The driven adjustment part 41 is provided with a butt locking part 42 that is adapted to lock various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel in conjunction with the adjustment limit part 23.

[0053] Please see Figure 7 , Figure 8 and Figure 9The driven adjustment part 41 includes a slide block 411 that is symmetrically slidably disposed on the guide rod 323 and moves left and right. An adjustment plate 412 is fixedly disposed on the lower side of the front and rear symmetrical slide blocks 411. A threaded seat 413 that is threadedly connected to the corresponding bidirectional screw 322 is fixedly disposed on the upper side of the adjustment plate 412 and located between the two slide blocks 411.

[0054] The motor 321 can drive the bidirectional screw 322 to rotate in a specific direction. The bidirectional screw 322 then moves synchronously in opposite directions or towards each other through the synchronous thread transmission with the symmetrical thread seat 413. The thread seat 413 then drives the corresponding adjusting plate 412 and slide 411 to move left and right along the guide rod 323 for adjustment, thereby causing the symmetrical adjusting plate 412 to move synchronously in opposite directions or towards each other along the guide rod 323.

[0055] Please see Figure 7 , Figure 8 and Figure 9 The docking locking part 42 includes a locking block 421 fixedly disposed on the lower side of the adjusting plate 412. The lower end of the locking block 421 is symmetrically provided with inclined surfaces for locking the angle steel. The lower side of the locking block 421 is provided with a V-shaped groove 422 that runs through the front and back and locks the square tube.

[0056] When two H-beams or U-beams are stably supported and limited on two symmetrical L-shaped limiting platforms 231, the cylinder 312 drives the U-shaped lifting platform 313 to move downward. The guide rod 323 then drives the corresponding sliding block 411 and the locking block 421 on the lower side of the adjusting plate 412 to move downward synchronously until the locking block 421 stably adheres and presses against the upper surface of the horizontal section of the corresponding H-beam or U-beam. The two H-beams or U-beams are then stably supported and limited on the two symmetrical L-shaped limiting platforms 231 without any forward or backward displacement (e.g., ...). Figure 10 or Figure 11 As shown), at this time, welding can be performed on the joint of the two H-beams or U-beams joined at both ends using welding equipment (not shown in the figure). The motor 321 drives the bidirectional screw 322 to rotate in a specific direction, causing the symmetrical adjusting plates 412 to move synchronously in opposite directions until the adjusting plates 412 are stably fitted to the inner side of the corresponding vertical section on the upper side of the H-beam (as shown in the figure). Figure 10 As shown in the figure, this further limits and locks the H-beam.

[0057] When the two square tubes are stably supported on the corresponding L-shaped limiting platform 231, the motor 321 first drives the adjusting plate 412 and the locking block 421 to move left and right until the V-groove 422 on the locking block 421 is aligned with the right-angle end of the upper end of the corresponding square tube. Then, the cylinder 312 drives the adjusting plate 412 and the locking block 421 to move downward until the V-groove 422 on the locking block 421 is stably fitted and pressed against the right-angle end of the upper end of the corresponding square tube. The two square tubes are then stably supported on the corresponding L-shaped limiting platform 231 and will not shift back and forth (e.g., Figure 12 As shown in the figure, the joint of the two square tubes can be welded by welding equipment (not shown in the figure). At the same time, the locking of the square tube can be released during the welding process to allow the square tube to be flipped and adjusted. After the flipping and adjustment is completed, the square tube is quickly locked and the joint is welded and reinforced, thereby completing the overall welding process of the joint of the two square tubes.

[0058] It should be noted that the welding method can be existing electric arc welding or resistance welding, or other methods.

[0059] When the two angle steels are stably supported and limited on the corresponding L-shaped limiting platform 231, the adjusting plate 412 and locking block 421 are first moved left and right by the motor 321 until the symmetrical inclined surface at the lower end of the locking block 421 is aligned with the upward opening of the corresponding angle steel. Then, the adjusting plate 412 and locking block 421 are moved downward by the cylinder 312 until the symmetrical inclined surface at the lower end of the locking block 421 is stably pressed against the inner wall of the upward opening of the corresponding angle steel. The two angle steels are then stably supported and limited on the corresponding L-shaped limiting platform 231 and will not shift back and forth (e.g., Figure 13 As shown in the figure, the joints of the two angle steels connected at both ends can be welded using welding equipment (not shown in the figure).

[0060] The above-described operation method allows for adaptive adjustments based on the cross-sectional profiles of different steel sections to ensure stable locking onto the limiting welding fixture. This provides reliable rigid support and locking for various cross-sectional steel sections during welding, effectively controlling the offset of the steel section joints and ensuring the stability of the steel end splicing. It also maintains high precision requirements for the joints, enabling welded joints of different cross-sectional steel sections to meet the specified welding precision standards.

[0061] It should be noted that existing technologies can also use specialized welding fixtures to stably limit and lock the connection of steel sections with one or two specific cross-sectional shapes and a single size specification. Although this is technically easier to implement and simpler to operate, it only solves the problem of limiting and locking the connection of steel sections with a limited number of cross-sectional shapes and a single size specification. When using this existing technology to stably limit and lock the connection of steel sections with multiple cross-sectional shapes and different sizes, it is still necessary to change and disassemble the welding fixture, resulting in high initial investment costs for the welding fixture, long production downtime, and low efficiency. However, in the solution of this invention, the connection positioning part 22, through structural conversion adjustment and in conjunction with the adaptive adjustment of the connection locking part 42, can achieve stable limiting of steel sections with multiple cross-sectional shapes and different sizes. The positioning and docking locking significantly reduce equipment investment and warehousing management costs, and greatly improve the production line's ability to quickly change over steel sections of different cross-sections, providing effective technical support for multi-variety, small-batch production modes. Meanwhile, compared to existing welding fixtures, the added mechanical structures such as the conversion mechanism 2 and locking mechanism 4 are all conventional and ordinary mechanical components, without any high-cost precision parts. They require only a one-time investment for long-term use, thus the cost of adding these structures is low. Compared to the significant reduction in equipment and warehousing management costs and the increased production efficiency from rapid changeover, the cost of adding these structures is negligible. In summary, the above-mentioned technical solution of this invention is a specific improvement based entirely on the existing technology and aimed at solving the technical problems.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0063] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A tool for welding in construction engineering, comprising a base plate, characterized in that: The upper side of the base plate is provided with a conversion mechanism and an adjustment mechanism located outside the conversion mechanism, and the adjustment mechanism is provided with a locking mechanism; The conversion mechanism includes a horizontal adjustment part disposed on the upper side of the base plate for left and right movement adjustment. The horizontal adjustment part is provided with a docking positioning part. The docking positioning part is provided with an adjustment limiting part that adapts to the stable positioning and precise docking requirements of various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel through structural conversion adjustment, and a support and reinforcement part that supports and reinforces the adjustment limiting part. The adjustment limiting part is provided with a locking part that cooperates with the docking positioning part to stably lock the adjustment limiting part. The adjustment mechanism includes a lifting adjustment part disposed on the upper side of the base plate and used for vertical movement adjustment, and the lifting adjustment part is provided with an adjustment drive part. The lifting adjustment unit includes a fixed platform fixedly mounted on the upper side of the base plate by multiple support columns. Cylinder 2 is symmetrically fixedly mounted on the upper side of the fixed platform, and a U-shaped lifting platform that moves up and down is fixedly mounted on the telescopic end of cylinder 2. The adjustment drive unit includes a motor fixedly installed on the right side of the U-shaped lifting platform. The drive end of the motor is fixedly provided with a bidirectional screw that is rotatably connected to the U-shaped lifting platform. Guide rods three are symmetrically fixedly installed on the inner side of the U-shaped lifting platform and on the front and rear sides of the bidirectional screw. The locking mechanism includes a driven adjustment part that is mounted on the adjustment drive part and moves left and right in coordination with the adjustment drive part. The driven adjustment part is provided with a butt locking part that is adapted to lock various cross-sectional shapes of steel such as H-beams, U-beams, square tubes and angle steel in coordination with the adjustment limit part. The driven adjustment part includes slide blocks that are symmetrically slidably mounted on the guide rod three and can move left and right, and an adjustment plate is fixedly mounted on the lower side of the front and rear symmetrical slide blocks. The docking locking part includes a locking block fixedly installed on the lower side of the adjusting plate. The lower end of the locking block is symmetrically provided with inclined surfaces for locking the angle steel. The lower side of the locking block is provided with a V-shaped groove that runs through the front and back and locks the square tube. The horizontal adjustment part includes guide rails that are symmetrically fixed on the upper side of the base plate. The docking positioning part includes positioning seats that are symmetrically fixed on the upper side of the moving platform. The positioning seat has a through-rotating groove. The positioning seat has a through-rotating positioning groove one on the lower side of the through-rotating groove and on the side near the center of the guide rail. The positioning seat has a through-rotating positioning groove two on the upper side of the through-rotating groove. The adjusting and limiting part includes an L-shaped limiting platform rotatably disposed between two positioning seats. The L-shaped limiting platform has symmetrically fixed rotating shafts on its front and rear sides that are rotatably connected to the corresponding rotating slots. A knob is fixedly disposed on the side of the rotating shaft away from the L-shaped limiting platform. The horizontal and vertical sections of the L-shaped limiting platform are symmetrically provided with threaded grooves that mate with positioning slot one and positioning slot two.

2. A tool for welding in construction engineering according to claim 1, characterized in that: The guide rail is symmetrically equipped with electric sliders that move left and right, and a moving platform is fixedly mounted on the upper side of the symmetrical electric sliders at the front and back.

3. The tooling for welding in construction engineering according to claim 1, characterized in that: The locking part includes a stud with an internal threaded connection in the threaded groove. A pin is fixedly provided on the side of the stud near the corresponding positioning seat, which is engaged with positioning groove one and positioning groove two. A hexagonal head is fixedly provided on the side of the pin away from the stud, which is used to assemble with an external hexagonal wrench.

4. The welding fixture for building construction according to claim 2, characterized in that: The support and reinforcement part includes a cylinder. A cylinder is fixedly installed on the lower side of each of the left and right symmetrical moving platforms. A reinforcement platform that moves up and down is fixedly installed at the telescopic end of the cylinder. A guide rod that is slidably connected to the moving platform is fixedly installed on the lower side of the reinforcement platform. The opposite sides of the two reinforcement platforms are both inclined surfaces.

5. The welding fixture for building construction according to claim 1, characterized in that: Two guide rods are symmetrically fixed on the upper side of the U-shaped lifting platform and are slidably connected to the fixed platform.

6. The welding fixture for building construction according to claim 1, characterized in that: A threaded seat that is threadedly connected to the corresponding bidirectional screw is fixedly installed on the upper side of the adjusting plate and between the two slides.

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