A building steel structural plate welding device

Abstract

The application relates to the technical field of plate welding, and discloses a steel structure plate welding device for buildings, which comprises a support and further comprises: a fixing mechanism symmetrically arranged on the support, when a plate moves along the fixing mechanism, the plate is fixed and clamped through both sides according to the thickness; a pressing mechanism comprising an upper pressing assembly and a lower pressing assembly, both of which are arranged on the support, wherein when thin plates are welded, the upper pressing assembly presses the top of the plate in a first state, and the lower pressing assembly supports the bottom of the plate; when thick plates are welded, the upper pressing assembly presses the top of the plate in a second state, and the fixing mechanism limits and supports the whole plate; the device can adaptively adjust the clamping and pressing force of the plate according to the thickness of the welded plate, adjust the positioning mode of the plate, ensure the welding quality of the plate, and improve the compatibility of the device.

Description

Technical Field

[0001] This invention relates to the field of plate welding technology, specifically to a welding device for steel structure plates used in construction. Background Technology

[0002] Steel structure buildings are widely used in modern construction projects due to their advantages such as high strength, light weight, good seismic performance, short construction period, and high degree of industrialization. As the basic component of steel structure buildings, the welding quality directly affects the safety and durability of the entire building structure. According to statistics, welding quality defects are one of the main causes of accidents in steel structure projects. Therefore, improving the welding quality of steel structure plates is of great engineering significance.

[0003] Welding of steel structure plates is mainly carried out by manual welding or automated welding equipment. Manual welding is highly flexible and adaptable to complex working conditions, but it has poor consistency, low efficiency, and difficulty in meeting the consistency of plate welding quality. Automated welding equipment is often used for plate welding because of its consistent welding quality and high production efficiency.

[0004] Current plate welding equipment relies on manual pressure adjustment for clamping force, resulting in rough clamping force adjustment and poor adaptability to thin and thick plates. Furthermore, it cannot adaptively adjust the clamping mode according to the plate thickness or the distance between the clamping points and weld seams, which can easily lead to thermal deformation during thin plate welding and insufficient penetration during thick plate welding. A single set of equipment has a single positioning method for welding thin and thick plates, resulting in poor compatibility. Summary of the Invention

[0005] This invention provides a welding device for steel structure plates used in construction. Through a fixing mechanism, it can stably position and clamp plates of different thicknesses. At the same time, through a clamping mechanism, it can adaptively clamp the plates according to their thickness. And through an adjusting mechanism, it can adjust the distance between the clamping points and the weld seams. This improves the compatibility of the device for welding thin and thick plates, while ensuring the welding quality of the plates. It solves the problems of poor plate positioning effect and poor compatibility for welding thin and thick plates mentioned in the background art.

[0006] This invention provides the following technical solution: A welding device for steel structure plates used in construction includes a support frame and further includes: a fixing mechanism symmetrically arranged on the support frame, wherein when the plate moves along the fixing mechanism, it is clamped and fixed according to its thickness through both sides; a clamping mechanism including an upper clamping component and a lower clamping component, both arranged on the support frame, wherein when welding thin plates, the upper clamping component clamps the top of the plate in a first state, and the lower clamping component supports the bottom of the plate; when welding thick plates, the upper clamping component clamps the top of the plate in a second state, and the fixing mechanism provides overall limiting support for the plate; and an adjusting mechanism including a gap adjustment component and a clamping adjustment component, wherein the gap adjustment component is arranged on the support frame. On the bracket, the clamping adjustment assembly is positioned between the fixing mechanism and the clamping mechanism. The gap adjustment assembly adjusts the distance between the clamping adjustment assembly and the weld seam according to the plate thickness, and adjusts the area of ​​the plate clamping region according to the plate width and thickness. It also includes a sensing rod. The clamping component includes a hinge seat with a connecting shaft rotatably connected to it. A servo motor is mounted on the outer side of the hinge seat, and the output end of the servo motor is connected to the end of one of the connecting shafts. An mounting sleeve is mounted on the connecting shaft, and an upper pressure plate is mounted on the mounting sleeve. An upper pressure block is mounted symmetrically on the mounting sleeve to the upper pressure plate. Both ends of the connecting shaft extend to the hinge seat. The external part of the connecting shaft is provided with a snap-fit ​​component at both ends. The snap-fit ​​component includes a snap-fit ​​groove and a snap-fit ​​block. The ends of adjacent connecting shafts that are close to each other are the snap-fit ​​groove and the snap-fit ​​block, respectively. When the upper pressure rod is in the retracted state, the snap-fit ​​groove and the snap-fit ​​block are engaged. The servo motor is electrically connected to the sensing rod. The first state is to use the upper pressure plate to press the thin plate with a clamping force of 0.05-0.15MPa. The second state is to use the upper pressure block to press the thick plate with a clamping force of 0.2-0.5MPa. The upper clamping assembly includes a mounting frame. A connecting cylinder is mounted on the mounting frame. The bottom of the connecting cylinder is connected to multiple upper pressure rods. The output end of the upper pressure rod is equipped with a clamping device. The components include: a lower pressing assembly comprising a support rod and a lower pressing plate, the support rod being mounted on a bracket, the lower pressing plate being mounted on top of the support rod, and a pad being mounted on top of the lower pressing plate; the support rod being electrically connected to a servo motor; a gap adjustment assembly comprising an adjustment guide rail, the adjustment guide rail being symmetrically mounted on a bracket, the mounting bracket being slidably connected to symmetrical positions of the adjustment guide rail, and the adjustment guide rail being electrically connected to a sensing rod; and a pressing adjustment assembly comprising a movable sealing plate, one end of the movable sealing plate extending into a connecting cylinder, the other end of the movable sealing plate being provided with a bent portion, a limiting component being mounted on the outer side of the fixed bracket, and the bent portion being slidably connected to the limiting component.

[0007] As a preferred embodiment of the present invention, the fixing mechanism includes a servo electric cylinder and a guide fixing assembly. The servo electric cylinder is mounted on a bracket, and the guide fixing assembly includes a fixing frame. The fixing frame is mounted on the output end of the servo electric cylinder, and support balls are evenly installed on the bottom of the inner side of the fixing frame.

[0008] As a preferred embodiment of the present invention, the sensing rod is installed on the top of the inner side of the fixing frame, a limiting plate is installed at the bottom end of the sensing rod, a spring is installed between the limiting plate and the fixing frame, a guide ball is installed at the bottom of the limiting plate, and the sensing rod is electrically connected to the servo electric cylinder.

[0009] As a preferred embodiment of the present invention, it further includes a guide slope, which is installed at the bottom of the limiting plate. The cross-section of the guide slope is a right triangle, and the inclined surface of the guide slope matches the direction of movement of the plate. The distance between the bottom of the guide slope and the bottom of the fixing frame is greater than the distance between the bottom of the guide ball and the bottom of the fixing frame. Multiple rollers are provided on the inclined surface of the guide slope.

[0010] As a preferred embodiment of the present invention, it further includes a sealing cavity, which is located at one end of the movable sealing plate near the connecting cylinder. An adjusting sealing plate is slidably connected inside the sealing cavity. A connecting cavity is provided inside the movable sealing plate. One end of the connecting cavity is connected to the sealing cavity, and the other end of the connecting cavity is connected to the sensing rod through a pipe. A storage groove is provided inside the movable sealing plate, which is connected to the sealing cavity. A sealing plate is slidably connected inside the storage groove, and one end of the sealing plate is connected to the adjusting sealing plate.

[0011] Compared with the prior art, the present invention provides a welding device for steel structure plates in buildings, which has the following advantages: 1. In this steel structure plate welding device for buildings, the fixing mechanism can guide and clamp the plates laterally, which can not only ensure the stability of the plates during movement and ensure the flatness of thin plates, but also reduce damage to the plates. At the same time, the clamping force can be adjusted according to the thickness of the plates to prevent deformation during the welding of thin plates and movement during the welding of thick plates, thereby improving the stability of plate welding.

[0012] 2. In this steel structure plate welding device for buildings, the clamping mechanism and the adjusting mechanism can automatically switch the plate clamping mode according to the plate thickness, and adaptively adjust the positional relationship of the clamping between the welds. This avoids thermal deformation or melt-through during thin plate welding, as well as insufficient penetration during thick plate welding. For plates of different thicknesses, the device can adaptively adjust the plate positioning method, thus improving the compatibility of the device with thin and thick plate welding.

[0013] The parts of this device not described herein are the same as or can be implemented using existing technologies. This invention can adaptively adjust the clamping and pressing force of the welded plates according to their thickness, adjust the positioning method of the plates, ensure the welding quality of the plates, and improve the compatibility of the device. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0015] Figure 1 This is a first three-dimensional schematic diagram of the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 This is a three-dimensional schematic diagram of the bracket in this invention; Figure 4 This is a partial perspective view of the present invention; Figure 5 This is a three-dimensional schematic diagram of the guide fixing component and the upper clamping component in this invention; Figure 6 This is a three-dimensional schematic diagram of the guide fixing component in this invention; Figure 7 This is a three-dimensional schematic diagram of the clamping assembly and the clamping adjustment assembly of the present invention; Figure 8 This is a partial cross-sectional structural diagram of the mounting bracket, connecting cylinder, and upper pressure rod in this invention; Figure 9 For the present invention Figure 8 A schematic diagram of the structure of part A; Figure 10 This is a three-dimensional schematic diagram of the hinge seat of the present invention.

[0016] In the diagram: 1. Bracket; 2. Servo electric cylinder; 3. Guide fixing assembly; 31. Fixing frame; 32. Sensing rod; 33. Limiting plate; 34. Spring; 35. Guide ball; 36. Support ball; 37. Guide slope; 38. Roller; 4. Positioning component; 5. Adjusting guide rail; 6. Mounting bracket; 7. Connecting cylinder; 8. Upper pressure rod; 9. Movable sealing plate; 91. Sealing cavity; 92. Adjustable sealing plate; 93. Connecting cavity; 94. Storage slot; 95. Sealing plate; 10. Bending section; 11. Limiting component; 12. Hinge seat; 13. Servo motor; 14. Connecting shaft; 15. Snap-fit ​​component; 16. Mounting sleeve; 17. Upper pressure plate; 18. Upper pressure block; 19. Support rod; 20. Lower pressure plate; 21. Pad plate; 22. Welding torch structure. Detailed Implementation

[0017] 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.

[0018] Reference Figures 1-10 A welding device for steel structure plates for building construction includes a support 1, on which a welding torch structure 22 is mounted. The welding torch structure 22 includes a multi-dimensional robotic arm and a welding torch. The multi-dimensional robotic arm is used to adjust the position and angle of the welding torch. A positioning element 4 is installed at the end of the support 1. The positioning element 4 adopts an electrically driven telescopic structure and is used to adjust and limit the position of one of the plates and to position the weld at the center of the guide fixing component 3.

[0019] Multi-dimensional robotic arms typically consist of multiple rotary joints and telescopic arm segments, enabling multi-degree-of-freedom pose adjustment in three-dimensional space. Through the coordinated movement of each joint, the multi-dimensional robotic arm drives the end-effector welding torch to a predetermined spatial position and angle, allowing the welding torch to adapt to different weld trajectories and welding positions. The optimal welding angle can be achieved through posture adjustment of the robotic arm, ensuring the stability of the welding arc and improving weld quality. Simultaneously, the automated control of the robotic arm ensures the continuity and consistency of the welding process, reducing uncertainties caused by manual operation. The positioning component 4 typically employs a motor, lead screw, gear rack, or electric actuator to achieve retractable linear motion. When the plates are fed into the welding station, the positioning component 4 extends under electric drive, mechanically limiting the end or side of one of the plates to be welded. By precisely controlling the extension length of the positioning component 4, the position of the plates can be adjusted so that the butt weld between the two plates is precisely located on the central symmetrical plane of the guide and fixing assembly 3. This ensures symmetrical distribution of clamping forces on the plates by the two clamping mechanisms, avoiding uneven welding stress caused by weld position deviation.

[0020] Reference Figures 5-6The fixing mechanism is symmetrically arranged on the bracket 1. When the plate moves along the fixing mechanism, it is fixed and clamped by both sides of the plate according to the thickness. The fixing mechanism includes a servo electric cylinder 2 and a guide fixing component 3. The servo electric cylinder 2 is installed on the bracket 1. The guide fixing component 3 includes a fixing frame 31. The fixing frame 31 is installed at the output end of the servo electric cylinder 2. Support balls 36 are evenly installed on the bottom of the inner side of the fixing frame 31.

[0021] When the plate is placed on the fixing mechanism, the bottom of the plate contacts the support ball 36. The support ball 36 bears the vertical load of the plate and allows the plate to move horizontally along the fixed direction. The servo cylinder 2 drives the fixing frame 31 to move towards the plate according to the control command, clamping the plate from both sides. Since the fixing mechanisms on both sides are symmetrically arranged, the clamping force is equal in magnitude and opposite in direction, forming a centering clamping effect. When the plate reaches the welding station, the control system commands the servo cylinders 2 on both sides to move synchronously according to the preset program or sensor feedback, pushing the fixing frame 31 to move towards the center. The fixing frame 31 applies clamping force from both sides of the plate to firmly fix the plate. After welding is completed, the servo cylinder 2 moves in the opposite direction to release the plate. The servo cylinder 2 has the characteristics of high control accuracy, fast response speed and stable output force, and can provide appropriate clamping force according to the characteristics of the plate.

[0022] Reference Figure 6 It also includes a sensing rod 32, which is installed on the top of the inner side of the fixed frame 31. A limit plate 33 is installed at the bottom of the sensing rod 32. A spring 34 is installed between the limit plate 33 and the fixed frame 31. A guide ball 35 is installed at the bottom of the limit plate 33. The sensing rod 32 is electrically connected to the servo cylinder 2. It also includes a guide slope 37, which is installed at the bottom of the limit plate 33. The cross-section of the guide slope 37 is a right triangle, and the inclined surface of the guide slope 37 matches the direction of movement of the plate. The distance between the bottom of the guide slope 37 and the bottom of the fixed frame 31 is greater than the distance between the bottom of the guide ball 35 and the bottom of the fixed frame 31. Multiple rollers 38 are provided on the inclined surface of the guide slope 37.

[0023] The sensing rod 32 adopts a telescopic structure. Fluid is installed within the telescopic cavity of the sensing rod 32, allowing it to compress the fluid during extension and retraction. During retraction, the fluid is transported to the sealing cavity 91 via a flexible or rigid pipe at the connecting cavity 93, thereby moving the adjusting sealing plate 92. This reduces the pressure point on the top of the plate when clamping thick plates. The sensing rod 32 integrates a displacement sensor or pressure sensor, which is connected to the control system of the servo cylinder 2 via an electrical signal. After the plate enters the fixing mechanism, its top contacts the guide ball 35, and its bottom contacts the support ball. 36. The plate thickness information is mechanically transmitted through the sensing rod 32 and converted into an electrical signal. After receiving the signal, the control system identifies the current plate thickness parameter. If the plate is thick, the displacement of the sensing rod 32 is large, and the control system instructs the servo cylinder 2 to provide a larger clamping stroke and clamping force. If the plate is thin, the displacement of the sensing rod 32 is small, and the control system correspondingly reduces the clamping force to prevent deformation of the thin plate. Throughout the process, the spring 34 ensures that the guide ball 35 remains in contact with the plate, ensuring the continuity of detection. The sensing rod 32 realizes real-time detection and feedback of the plate thickness, enabling the fixing mechanism to have adaptive clamping capability. The spring 34 provides both detection sensitivity and cushioning protection, preventing rigid contact damage to the plate surface. The rolling contact of the guide ball 35 reduces the plate's movement resistance while ensuring the accuracy of the detection point position. One right-angled side of the guide slope 37 is fixed to the bottom surface of the limiting plate 33, while the other right-angled side points vertically downwards, forming an inclined guide surface. The overall height is less than the diameter of the guide ball 35, ensuring that the guide ball 35 is the primary contact element. Multiple mounting grooves are formed on the inclined surface, with rollers 38 arranged within them. It can rotate freely around its own axis. When the plate is being fed, there may be a certain positional error due to the difference in thickness. The front end of the plate contacts the inclined surface of the guide slope 37. During the sliding process along the inclined surface, the roller 38 continues to rotate to reduce frictional resistance. After the plate is completely inserted into the fixing mechanism, it is separated from the guide slope 37. The guide ball 35 and the support ball 36 work together to achieve precise guidance and support. The guide slope 37 realizes the function of guiding the plate, reduces the feeding accuracy requirements, and improves the operation convenience of the device. The roller 38 reduces the frictional resistance during the guiding process and avoids scratches on the plate surface, thus ensuring the smooth conveying of the plate.

[0024] Reference Figures 1-3 The clamping mechanism includes an upper clamping component and a lower clamping component, both of which are mounted on the bracket 1. When welding a thin plate, the upper clamping component clamps the top of the plate in a first state, and the lower clamping component supports the bottom of the plate. When welding a thick plate, the upper clamping component clamps the top of the plate in a second state, and the fixing mechanism provides limiting support for the entire plate. The thickness of thin plates is generally 2-3mm, and the thickness of thick plates is generally greater than 4mm. In this case, the clamping force in the first state is 0.05-0.15MPa, and a single clamping structure uses an upper pressure plate 17 to achieve large-area clamping. The clamping force in the second state is 0.2-0.5MPa, and a single clamping structure uses an upper pressure block 18 to achieve small-area clamping. It should be noted that the specific area of ​​the upper pressure plate 17 and the upper pressure block 18 is not limited here. During welding, it is usually necessary to combine the design with the thickness of the plate. As long as the clamping pressure is dispersed when welding thin plates to suppress thermal deformation and prevent collapse and burn-through, and the clamping pressure is concentrated when welding thick plates to form a strong locking and avoid the bevel, the welding accuracy can be guaranteed.

[0025] Reference Figure 7 and Figure 10 The upper clamping assembly includes a mounting bracket 6, on which a connecting cylinder 7 is mounted. The bottom of the connecting cylinder 7 is connected to multiple upper pressure rods 8. A clamping component is mounted on the output end of the upper pressure rod 8. The clamping component includes a hinge seat 12. A connecting shaft 14 is rotatably connected to the hinge seat 12. A servo motor 13 is mounted on the outer side of the end hinge seat 12. The output end of the servo motor 13 is connected to the end of one of the connecting shafts 14. An installation sleeve 16 is mounted on the connecting shaft 14. An upper pressure plate 17 is mounted on the installation sleeve 16. An upper pressure block 18 is mounted on the installation sleeve 16 at the symmetrical position of the upper pressure plate 17. Both ends of the connecting shaft 14 extend to the outside of the hinge seat 12, and both ends of the connecting shaft 14 are provided with a snap-fit ​​component 15. The snap-fit ​​component 15 includes a snap-fit ​​groove and a snap-fit ​​block. The ends of adjacent connecting shafts 14 that are close to each other are the snap-fit ​​groove and the snap-fit ​​block, respectively. When the upper pressure rod 8 is in the retracted state, the snap-fit ​​groove and the snap-fit ​​block are engaged. The servo motor 13 is electrically connected to the sensing rod 32.

[0026] The connecting cylinder 7 is a driving element, specifically a synchronous cylinder. Through the transmission of electrical signals (in this embodiment, the control electrical signal of the connecting cylinder 7 is specifically the electrical signal emitted by the sensor in the sensing rod 32, that is, the connecting cylinder 7 drives the upper pressure rod 8 to extend to different lengths according to the thickness of the plate), the connecting cylinder 7 can discharge an equal volume of fluid into multiple upper pressure rods 8 each time, thereby driving multiple upper pressure rods 8 to extend synchronously and at equal intervals. When the flow between the connecting cylinder 7 and the upper pressure rod 8 is in a closed state, the upper pressure rod 8 here will extend.

[0027] The hinge 12 is a U-shaped or box-shaped open support structure, providing a mounting point for the connecting shaft 14. The servo motor 13 is mounted on the outermost hinge 12, and its output shaft is connected to the end of the connecting shaft 14, providing rotational driving force. The mounting sleeve 16 is fixedly or keyedly connected to the connecting shaft 14 and rotates synchronously with the shaft. The upper pressure plate 17 and the upper pressure block 18 are symmetrically arranged on the circumference of the mounting sleeve 16. They have different shapes and sizes to adapt to the pressing requirements of thin and thick plates, respectively. The snap-fit ​​component 15 includes a snap-fit ​​groove (recess) and a snap-fit ​​block (boss). The ends of adjacent connecting shafts 14 cooperate with each other. The geometry of the snap-fit ​​groove and the snap-fit ​​block matches to achieve meshing transmission. During the welding preparation stage, the upper pressure rod 8 is in a retracted state, and each connecting shaft 14 meshes with each other through the snap-fit ​​component 15; induction Rod 32 detects the thickness of the plate and sends an electrical signal; servo motor 13 receives the signal and drives the end connecting shaft 14 to rotate; through the meshing transmission of the snap-fit ​​15, all connecting shafts 14 rotate synchronously, switching to the corresponding working pressure head (upper pressure plate 17 or upper pressure block 18); after the switching is completed, the upper pressure rod 8 extends, the snap-fit ​​15 disengages, and each clamping component can independently clamp the plate; after welding is completed, the upper pressure rod 8 retracts, the snap-fit ​​15 re-engages, preparing for the next switching, realizing the automatic switching of thin plate / thick plate clamping mode. The upper pressure plate 17 is suitable for large-area low-pressure clamping of thin plates, and the upper pressure block 18 is suitable for small-area high-pressure clamping of thick plates, improving the process adaptability of the device. The snap-fit ​​15 ensures the synchronous switching of multiple clamping components and ensures that the working state of each clamping point is consistent.

[0028] Reference Figure 3 The lower clamping assembly includes a support rod 19 and a lower pressure plate 20. The support rod 19 is mounted on the bracket 1, and the lower pressure plate 20 is mounted on the top of the support rod 19. A pad 21 is mounted on the top of the lower pressure plate 20. The support rod 19 is electrically connected to the servo motor 13.

[0029] The support rod 19 is a vertically arranged, electrically driven telescopic structure. The lower pressure plate 20 is a flat, horizontally arranged plate that provides a support plane for the bottom of the plate. The pad 21 is typically made of copper, which can both support the thin plate and dissipate heat at the weld, preventing the thin plate from melting through. For thin plate welding, the support rod 19 extends and the lower pressure plate 20 is close to the weld, providing rigid support for the bottom of the plate and preventing welding thermal deformation. The pad 21 is used for heat dissipation during the welding process. For thick plate welding, the support rod 19 is retracted and the lower pressure plate 20 is away from the weld. Support is mainly provided by the support ball 36, avoiding obstruction of the welding thermal expansion of the thick plate. The lower and upper clamping components work together to realize a differentiated support strategy for thin and thick plates, ensuring the flatness of thin plate welding and avoiding stress concentration in thick plate welding caused by rigid constraints, thereby improving the automation level of the device and the stability of welding quality.

[0030] Reference Figures 1-2The adjustment mechanism includes a gap adjustment component and a clamping adjustment component. The gap adjustment component is mounted on the bracket 1, and the clamping adjustment component is positioned between the fixing mechanism and the clamping mechanism. The gap adjustment component adjusts the distance between the gap and the weld according to the thickness of the plate, and the clamping adjustment component adjusts the area of ​​the clamping area of ​​the plate according to the width and thickness of the plate.

[0031] Reference Figures 4-5 The gap adjustment assembly includes an adjustment guide rail 5, which is symmetrically mounted on the bracket 1. The mounting brackets 6 are slidably connected to the symmetrical positions of the adjustment guide rail 5. The adjustment guide rail 5 is electrically connected to the sensing rod 32. The pressing adjustment assembly includes a movable sealing plate 9, one end of which extends into the connecting cylinder 7. The other end of the movable sealing plate 9 is provided with a bent part 10. A limiting member 11 is installed on the outside of the fixing bracket 31. The bent part 10 and the limiting member 11 are slidably connected.

[0032] The adjusting guide rail 5 adopts a linear guide rail structure, and a drive mechanism, such as a motor-screw mechanism or a linear motor, can be set inside or on the side to drive the mounting frame 6 to move. The control system of the adjusting guide rail 5 is connected to the electrical signal output terminal of the sensing rod 32. According to the plate thickness signal detected by the sensing rod 32, the adjusting guide rail 5 automatically adjusts the distance between the mounting frame 6 and the upper clamping assembly and the weld centerline. For thinner plates, the heat-affected zone of the weld is relatively small, and the upper clamping assembly needs to be close to the weld to provide effective anti-deformation constraint. At this time, the adjusting guide rail 5 drives the mounting frame 6 to move towards the center. For thicker plates, the weld width is larger, requiring more operating space. At the same time, the thick plate itself has better rigidity, and the clamping assembly can be appropriately moved away from the weld. At this time, the adjusting guide rail 5 drives the mounting frame 6 to move outward, realizing automatic optimization of the distance between the clamping mechanism and the weld, ensuring that plates of different thicknesses can obtain the best clamping effect, and providing a reliable position reference for high-quality welding. The movable sealing plate 9 has a plate-like structure. One end is inserted into the cavity of the connecting cylinder 7 to form a piston structure, while the other end is located outside the connecting cylinder 7. The movable sealing plate 9 and the connecting cylinder 7 are sealed and can slide relative to each other. When the fixing mechanism adjusts the clamping position according to the width of the plate, the fixing frame 31 moves accordingly, driving the limiting member 11 to move synchronously. The limiting member 11, through the sliding engagement of the bending part 10, drives the movable sealing plate 9 to move within the connecting cylinder 7, thereby changing the effective volume or blocking part of the upper pressure rod 8 interface. This allows the number of upper pressure rods 8 involved in the operation to be adjusted according to the width of the plate. The wider the plate, the smaller the travel of the fixing frame 31, and the more the movable sealing plate 9 extends. The shallower the insertion of the connecting cylinder 7, the more upper pressure rods 8 are opened; the narrower the plate, the deeper the moving sealing plate 9 extends, and the fewer upper pressure rods 8 are opened. This achieves mechanical linkage adjustment between the number of pressing points and the width of the plate, without the need for electrical control or manual intervention. The structure is simple and reliable. The sliding connection between the bending part 10 and the limiting part 11 converts the linear motion of the fixed mechanism into the linear motion of the moving sealing plate 9. The motion transmission is accurate and smooth. The position of the moving sealing plate 9 in the connecting cylinder 7 directly determines the distribution range of the effective pressing points, realizing automatic matching between the pressing width and the width of the plate. This avoids energy waste caused by too many pressing points or insufficient pressing points leading to insecure pressing.

[0033] Reference Figures 7-9 It also includes a sealing cavity 91, which is located at one end of the movable sealing plate 9 near the connecting cylinder 7. An adjusting sealing plate 92 is slidably connected inside the sealing cavity 91. A connecting cavity 93 is provided inside the movable sealing plate 9. One end of the connecting cavity 93 is connected to the sealing cavity 91, and the other end of the connecting cavity 93 is connected to the sensing rod 32 through a pipe. A storage groove 94 is provided inside the movable sealing plate 9. The storage groove 94 is connected to the sealing cavity 91. A sealing plate 95 is slidably connected inside the storage groove 94, and one end of the sealing plate 95 is connected to the adjusting sealing plate 92.

[0034] The sealing cavity 91 is a rectangular cavity at the end of the movable sealing plate 9, with its opening facing the interior of the connecting cylinder 7. The adjusting sealing plate 92 is a piston-shaped structure located inside the sealing cavity 91 and can slide along the cavity wall. The connecting cavity 93 is a channel opened inside the movable sealing plate 9, with one end connected to the sealing cavity 91 and the other end connected to the fluid outlet of the sensing rod 32 via a flexible hose or rigid pipe. The receiving groove 94 is a narrow and elongated cavity opened inside the movable sealing plate 9, communicating parallel to the sealing cavity 91. The sealing plate 95 is a sheet-like structure located inside the receiving groove 94. First, using the plate thickness information detected by the sensing rod 32, the adjusting sealing plate 92 is driven to move through fluid pressure transmission, further finely adjusting the clamping parameters. When the plate is thicker, the fluid pressure or volume change fed back by the sensing rod 32 causes the adjusting sealing plate 92 to extend into the connecting cylinder 7, driving the sealing plate 95 to move synchronously, further blocking the specific upper pressure rod 8 interface. Because when the plate is thicker, the clamping point needs to be far away from the weld seam, and the density needs to be lower, therefore, compared with the same Thin plates of uniform width require fewer clamping points. To prevent interference from the fixing frame 31, a sealing plate 95 seals the sealing cavity 91, preventing fluid from the connecting cylinder 7 from entering and affecting the clamping points during operation. This achieves two-stage linkage adjustment of the plate thickness and clamping point distribution. The first stage matches the clamping width with the plate width through mechanical linkage between the moving sealing plate 9 and the fixing frame 31. The second stage matches the clamping tightness with the plate thickness through linkage between the sensing rod 32, fluid transmission, and adjusting the sealing plate 92. These two stages work together to achieve fully adaptive matching of clamping parameters (clamping force, number of clamping points, clamping point distribution) with plate specifications (width, thickness). The compact structure integrates complex adjustment functions within the moving sealing plate 9 without additional space requirements. The fluid transmission method enables flexible connection of the actuators, ensuring smooth motion transmission, good buffering performance, and improved reliability and lifespan of the adjustment system.

[0035] Components not described in detail in this article are existing technologies.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding device for steel structure plates used in construction, comprising a support (1), characterized in that, Also includes: The fixing mechanism is symmetrically arranged on the bracket (1). When the plate moves along the fixing mechanism, it is fixed and clamped by both sides of the plate according to the thickness. The clamping mechanism, including an upper clamping assembly and a lower clamping assembly, is mounted on the bracket (1). When welding thin plates, the upper clamping assembly clamps the top of the plate in the first state, and the lower clamping assembly supports the bottom of the plate. When welding thick plates, the upper clamping assembly clamps the top of the plate in the second state, and the fixing mechanism provides limiting support for the entire plate. The adjustment mechanism includes a gap adjustment component and a pressing adjustment component. The gap adjustment component is set on the bracket (1), and the pressing adjustment component is set between the fixing mechanism and the pressing mechanism. The gap adjustment component adjusts the distance between the pressing adjustment component and the weld according to the thickness of the plate. The pressing adjustment component adjusts the area of ​​the pressing area of ​​the plate according to the width and thickness of the plate. The upper clamping assembly includes a mounting bracket (6), on which a connecting cylinder (7) is mounted. The bottom of the connecting cylinder (7) is connected to a plurality of upper pressure rods (8), and a clamping element is mounted on the output end of the upper pressure rods (8). It also includes a sensing rod (32), the clamping member includes a hinge (12), a connecting shaft (14) is rotatably connected to the hinge (12), a servo motor (13) is installed on the outer side of the hinge (12) at the end, the output end of the servo motor (13) is connected to the end of one of the connecting shafts (14), an installation sleeve (16) is installed on the connecting shaft (14), an upper pressure plate (17) is installed on the installation sleeve (16), and an upper pressure block (18) is installed on the installation sleeve (16) at the symmetrical position of the upper pressure plate (17). Wherein, the two ends of the connecting shaft (14) extend to the outside of the hinge seat (12), and both ends of the connecting shaft (14) are provided with snap-fit ​​parts (15). The snap-fit ​​parts (15) include snap-fit ​​grooves and snap-fit ​​blocks. The ends of the adjacent connecting shafts (14) that are close to each other are snap-fit ​​grooves and snap-fit ​​blocks, respectively. When the upper pressure rod (8) is in the retracted state, the snap-fit ​​grooves and snap-fit ​​blocks are engaged. The servo motor (13) is electrically connected to the sensing rod (32). The first state is to use the upper pressure plate (17) to press the thin plate with a pressing force of 0.05-0.15MPa. The second state is to use the upper pressure block (18) to press the thick plate with a pressing force of 0.2-0.5MPa. The lower clamping assembly includes a support rod (19) and a lower pressure plate (20). The support rod (19) is mounted on the bracket (1), and the lower pressure plate (20) is mounted on the top of the support rod (19). A pad (21) is mounted on the top of the lower pressure plate (20). The support rod (19) is electrically connected to the servo motor (13). The gap adjustment assembly includes an adjustment guide rail (5), which is symmetrically mounted on the bracket (1). The mounting bracket (6) is slidably connected to the symmetrical positions of the adjustment guide rail (5). The adjustment guide rail (5) is electrically connected to the sensing rod (32). The pressing and adjusting assembly includes a movable sealing plate (9), one end of which extends into the connecting cylinder (7), and the other end of which is provided with a curved portion (10). The fixing mechanism includes a guide fixing assembly (3), which includes a fixing frame (31). A limiting member (11) is installed on the outside of the fixing frame (31), and the curved portion (10) and the limiting member (11) are slidably connected.

2. The welding device for steel structure plates in construction according to claim 1, characterized in that, The fixing mechanism includes a servo cylinder (2), which is mounted on a bracket (1). The fixing frame (31) is mounted on the output end of the servo cylinder (2), and support balls (36) are evenly installed on the bottom of the inner side of the fixing frame (31).

3. The welding device for steel structure plates in construction according to claim 2, characterized in that, The sensing rod (32) is installed on the top of the inner side of the fixing frame (31). A limiting plate (33) is installed at the bottom end of the sensing rod (32). A spring (34) is installed between the limiting plate (33) and the fixing frame (31). A guide ball (35) is installed at the bottom of the limiting plate (33). The sensing rod (32) is electrically connected to the servo electric cylinder (2).

4. The welding device for steel structure plates in construction according to claim 3, characterized in that, It also includes a guide slope (37), which is installed at the bottom of the limiting plate (33). The cross section of the guide slope (37) is a right triangle, and the inclined surface of the guide slope (37) matches the direction of movement of the plate. The distance between the bottom of the guide slope (37) and the bottom of the fixing frame (31) is greater than the distance between the bottom of the guide ball (35) and the bottom of the fixing frame (31). Multiple rollers (38) are provided on the inclined surface of the guide slope (37).

5. The welding device for steel structure plates in construction according to claim 3, characterized in that, It also includes a sealing cavity (91), which is located at one end of the movable sealing plate (9) near the connecting cylinder (7). An adjusting sealing plate (92) is slidably connected inside the sealing cavity (91). A connecting cavity (93) is provided inside the movable sealing plate (9). One end of the connecting cavity (93) is connected to the sealing cavity (91), and the other end of the connecting cavity (93) is connected to the sensing rod (32) through a pipe. The movable sealing plate (9) has a storage groove (94) inside, which is connected to the sealing cavity (91). A sealing plate (95) is slidably connected inside the storage groove (94), and one end of the sealing plate (95) is connected to the adjusting sealing plate (92).

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