H-shaped steel skeleton welding device

Abstract

The application discloses a H-shaped steel skeleton welding device, which comprises a plurality of clamping devices arranged in a straight line for clamping H-shaped steel, and welding mechanisms A and B symmetrically distributed on both sides of the clamping devices for welding both sides of the H-shaped steel in the length direction, wherein the welding mechanism A comprises a guide rail fixedly installed on the ground, a driving sliding seat slidingly installed on the guide rail, and a welding arm installed on the driving sliding seat. The plurality of clamping devices arranged in a straight line along the length direction of the H-shaped steel can complete accurate positioning, strong clamping and keeping of the upper flange plate, the web plate and the lower flange plate at the same station at one time, and then automatic welding is performed by the symmetric welding mechanisms on both sides. The intermediate spot welding fixing and component transfer links are omitted, a plurality of processes are integrated into one continuous process, and the production efficiency is greatly improved, and the production process is simplified.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more particularly to the field of steel structure welding equipment for engineering construction, specifically to a welding device for an H-shaped steel frame. Background Technology

[0002] H-beams, as important steel structural components, are widely used in construction, bridges, shipbuilding, and geological treatment. Their manufacturing core lies in reliably connecting the upper flange, web, and lower flange into a single unit using four longitudinal fillet welds. Traditional H-beam welding processes are mainly divided into two types: manual welding and automated submerged arc welding. Manual welding offers high flexibility but suffers from low welding efficiency, poor quality stability, high labor intensity for welders, and a high dependence on operator skill. More importantly, under the influence of welding heat input, components are highly susceptible to welding deformations such as twisting, angular deformation, and lateral bending, resulting in arduous subsequent correction work, impacting production efficiency and finished product quality.

[0003] Currently, the mainstream automated production method typically employs a two-step process: "first assembling and spot welding for fixation, then moving to the welding station for submerged arc welding." This involves first initially positioning the three plates on an assembly machine and temporarily fixing them using intermittent spot welding, then transporting the spot-welded H-beam semi-finished product to a dedicated submerged arc welding production line for welding. While this method improves welding efficiency, it still has the following inherent drawbacks: On the one hand, spot welding provides only temporary connections with limited strength. During hoisting, collisions or the component's own weight can cause slight misalignment, affecting the final welding accuracy. On the other hand, at the welding station, components are typically supported only by simple support rollers or clamps, without applying continuous and effective constraint to the mating surfaces of the flange and web throughout the welding process. When the weld metal cools and contracts, the flange, lacking sufficient constraint, is prone to angular deformation. Furthermore, assembly and welding are performed on separate equipment, leading to complex production rhythm coordination and increased production time and risk of impact during material handling. Separate assembly and welding production lines are also required, resulting in large equipment footprints and high overall investment costs.

[0004] Therefore, there is an urgent need for an H-beam welding device that can integrate precise positioning, strong clamping and automatic welding, and continuously suppress deformation during the welding process, so as to achieve more efficient, higher quality and more controllable deformation one-stop automated production. Utility Model Content

[0005] In order to address the problems of low efficiency, poor quality stability, and high labor intensity of welders in existing manual welding as mentioned in the background art, this application provides an H-shaped steel frame welding device to replace existing manual welding or automatic welding equipment.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A welding device for H-beam steel frame includes multiple clamping devices arranged in a straight line for clamping H-beams, and welding mechanism A and welding mechanism B symmetrically distributed on both sides of the clamping devices for welding both sides of the H-beams along their length. Welding mechanism A includes a guide rail fixedly installed on the ground and a drive slide mounted on the guide rail. A welding arm is mounted on the drive slide.

[0007] Preferably, the clamping device includes a bracket fixedly installed on the ground, and clamping units symmetrically distributed and fixedly installed on both sides of the bracket. The clamping units are respectively provided with clamping mechanism A, clamping mechanism B, clamping mechanism C and clamping mechanism D from bottom to top. Clamping mechanism A and clamping mechanism B are respectively defined to position and fix the horizontal and vertical positions of the lower wing plate, clamping mechanism C is defined to position and fix the horizontal position of the web plate, and clamping mechanism D is defined to position and fix the vertical position of the upper wing plate.

[0008] Preferably, the clamping mechanism C includes a lifting driver A fixedly mounted on a bracket, a support plate A fixedly connected to the lifting driver A, at least one guide rod A fixedly mounted on the support plate A, the output shaft A of the lifting driver A passing through the support plate A to rotate or drive a push plate A for abutting against the web plate, and the lifting output shaft drives the push plate A to slide back and forth along the guide rod A.

[0009] Preferably, a wear-resistant layer is fixedly provided at one end of the push plate A near the web plate, and the wear-resistant layer is made of any one of soft plastic, rubber and flexible composite material.

[0010] Preferably, the clamping mechanism D includes a lifting driver B fixedly mounted on the bracket, a support plate B fixedly mounted on the housing of the lifting driver B, at least one guide rod B vertically fixedly mounted on the support plate B, and a pressing plate B parallel to the support plate B and slidably disposed on the guide rod B for pressing the upper wing plate. The pressing plate B is rotatably or drively connected to the output shaft B of the lifting driver B.

[0011] Preferably, the upper end face of the push plate A is provided with a boss on the side away from the upper wing plate to prevent the upper wing plate from moving horizontally.

[0012] Preferably, when the output shaft of the lifting driver A and the push plate A are connected by an axial rotation or a spherical rotation structure, the lifting driver A is any one of an electric push cylinder, a pneumatic cylinder, and a hydraulic cylinder.

[0013] Preferably, when the output shaft of the lifting driver A and the push plate A are connected by a drive connection structure, the lifting driver A is a servo motor with a threaded output shaft.

[0014] Preferably, when the push plate B and the output shaft B of the lifting driver B are connected by a drive, the lifting driver B is a servo or stepper motor, and the output shaft B is a lead screw.

[0015] Preferably, when the push plate B and the lifting drive B are rotatably connected, the lifting drive B is any one of an electric push cylinder, a pneumatic cylinder, and a hydraulic cylinder.

[0016] Beneficial effects: 1. This invention utilizes multiple clamping devices arranged in a straight line along the length of the H-beam to precisely position, forcefully clamp, and hold the upper flange, web, and lower flange in a single workstation, followed by automatic welding by symmetrical welding mechanisms on both sides. This eliminates the intermediate spot welding and component transfer steps, integrating multiple processes into a single continuous process, significantly improving production efficiency and simplifying the production flow.

[0017] 2. The core advantage of this invention lies in its multi-clamping device design. Throughout the welding process, clamping mechanisms A, B, C, and D continuously apply precise constraint forces to the lower flange in the horizontal and vertical directions, and to the web in the horizontal direction and the upper flange in the vertical direction. This multi-point synchronous rigid constraint, distributed along the entire length of the component, can strongly resist the shrinkage stress caused by uneven heating and cooling in the weld area, thereby significantly reducing angular deformation of the flange and defects such as twisting and bending of the entire H-beam, improving the dimensional accuracy and straightness of the component, and greatly reducing the workload of subsequent straightening or even eliminating the need for straightening.

[0018] 3. The symmetrically distributed welding mechanisms A and B can simultaneously weld the fillet welds on both sides of the H-beam. This double-sided synchronous symmetrical welding technology ensures that the heat input on both sides is basically balanced, further offsetting the torsional stress caused by unilateral welding. At the same time, because the component is firmly clamped without movement or vibration, the weld alignment is good, making the welding process extremely stable and conducive to obtaining high-quality welds with uniform shape and consistent internal quality.

[0019] 4. The device integrates clamping, positioning, and welding functions, featuring a compact structure and reducing the need for dedicated assembly machines and other independent equipment. The design of the drive slide and guide rail allows the welding arm to move flexibly and smoothly along the long seam, suitable for welding H-beams of different lengths. The modular arrangement of the clamping devices allows for flexible adjustment of the number and spacing according to the standard product length, providing wide adaptability.

[0020] 5. The pressure plates A / B can be designed with a rotatable connection to the output shaft of the driver, or be fitted with a wear-resistant / soft material layer. This provides sufficient clamping force while preventing scratches or damage to the steel plate surface during clamping. It also accommodates minor unevenness in the plate material, ensuring reliable clamping without damaging the workpiece. The boss on the clamping mechanism C effectively prevents accidental horizontal displacement of the web plate, resulting in more precise and reliable positioning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is the structural isometric drawing of this utility model.

[0023] Figure 2 yes Figure 1 Top view.

[0024] Figure 3 This is an isometric view of the clamping device.

[0025] Figure 4 yes Figure 3 Axonometric view of the structure from a reverse perspective.

[0026] In the diagram: 1-Welding mechanism A; 11-Guide rail; 12-Drive slide; 13-Welding arm; 2-Welding mechanism B; 3-Clamping device; 4-H-beam; 31-Bracket; 32-Clamping mechanism A; 33-Leveling base; 34-Clamping mechanism B; 35-Clamping mechanism C; 351-Guide rod A; 352-Support plate A; 353-Lifting driver A; 354-Push plate A; 36-Clamping mechanism D; 361-Lifting driver B; 362-Guide rod B; 363-Support plate B; 364-Push plate B. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1: This embodiment provides a welding device for an H-beam steel frame; see the structure below. Figures 1-2As shown, it includes multiple clamping devices 3 arranged in a straight line for clamping H-beams, and welding mechanisms A1 and B2 symmetrically distributed on both sides of the clamping devices 3 for welding both sides of the H-beams along their length. The welding mechanism A1 includes a guide rail 11 fixedly installed on the ground and a drive slide 12 slidably installed on the guide rail 11. A welding arm 13 is installed on the drive slide 12.

[0034] Working principle: See Figure 1 and Figure 2 As shown, the upper and lower flanges and web plates, which have undergone edge pretreatment to form the H-beam 4, are placed in the clamping device 3 according to the required H-beam 4. It is ensured that the end faces of the two long sides of the web plate are aligned with and in contact with the center lines of the upper and lower flanges. The upper and lower flanges and web plates are positioned and fixed by the clamping device 3. At this time, the shape of the entire H-beam 4 is consistent with the target shape, except that the upper and lower flanges and web plates are in a separated state. The welding mechanisms A1 and B2 located on both sides adjust the welding guns to align with the joint between the upper / lower flanges and the web plates to prepare for welding. Before welding, the welding guns of the welding mechanisms A1 and B2 are aligned with the weld at a 45° angle without being powered on. The welding mechanisms A1 and B2 are then driven by their respective drive slides 12 to slide back and forth along the guide rail 11 to check whether the gap between the welding gun and the weld meets the requirements. If the requirements are met, welding mechanisms A1 and B2 are adjusted to their initial positions, such as the left or right end of guide rail 11, with the welding torch aligned with the seam between the upper / lower flange and the web. Matching welding wires are loaded and shielding gas is connected. Welding is performed synchronously or asynchronously on both sides according to the preset welding parameters and travel speed until a single weld on one side is completed. Then, the welding torch is adjusted to the other weld on the same side, and the same procedure is executed until the H-beam 4 is welded. It is worth noting that the welding angles and travel methods of welding mechanisms A1 and B2, including travel and welding parameters, are existing technologies. Those skilled in the art can use different welding wires and torches, such as MIG / MAG torches, depending on the material of the object being welded. This embodiment mainly improves upon the modular structure; see the appendix of the specification for details. Figure 1As shown, welding mechanisms A1 and B2 are arranged parallel and symmetrically. They generally employ synchronous welding, meaning welding is performed simultaneously on both sides of a weld seam using the same parameters and travel speed. This ensures the molten pool completely fills the weld seam, preventing incomplete welds. Compared to asynchronous welding, the material joint only needs to melt once, forming a single shape, significantly reducing internal stress and preventing bending or warping of the material due to unilateral stress, thus avoiding unstable quality issues after welding the H-beam 4. Furthermore, although this invention uses simultaneous welding on both sides, fundamentally reducing internal stress and torsional deformation, the modular layout of the clamping device 3 allows for arrangement according to different sizes of H-beam 4. Additionally, the number and density of clamping devices 3 can be adjusted based on different thicknesses and deformation amounts, offering significant practicality and flexible layout capabilities.

[0035] Example 2: To better optimize the clamping device 3, enabling stable and rapid positioning and clamping of the upper and lower wing plates and the web plate, while also accommodating a wide range of different sizes and models, please refer to [reference needed]. Figure 3 and Figure 4 As shown, the clamping device 3 includes a bracket 31 fixedly installed on the ground, and clamping units symmetrically distributed and fixedly installed on both sides of the bracket 31. The clamping units are respectively provided with clamping mechanism A32, clamping mechanism B34, clamping mechanism C35 and clamping mechanism D36 from bottom to top. The clamping mechanism A32 and clamping mechanism B34 are respectively defined to position and fix the horizontal and vertical positions of the lower wing plate, the clamping mechanism C35 is defined to position and fix the horizontal position of the web plate, and the clamping mechanism D36 is defined to position and fix the vertical position of the upper wing plate.

[0036] See Figures 3-4 As shown, the horizontal position of the lower wing plate is defined and fixed by a pair of clamping mechanisms B34, and the vertical position is defined by the leveling base 33 mounted on the bracket 31, as shown. Figure 3As shown, it should be noted that the leveling base 33 is not an essential structure, but is determined based on the needs of H-beams 4 of different heights. Different H-beams 4 can use leveling bases 33 of different heights to better adapt to the effective clamping stroke of the clamping mechanism A32. After the lower flange is fixed by the clamping mechanisms B34 on both sides, it is then fixed by the clamping mechanism A32, completing the installation of the lower flange. Next, the web is installed, placed between the two clamping mechanisms C35 and fixed by the two clamping mechanisms C35. Finally, the upper flange is fixed by two holding mechanisms D36, ultimately achieving the fixation of the entire H-beam 4 and preparing it for welding. It is worth noting that this utility model was developed for mainstream symmetrical H-beams, which can be achieved by setting the parameters of the clamping units on both sides to be the same. In order to further meet different needs, different models or those with special requirements can also be fixed asymmetrically by adjusting the clamping mechanisms A, B, C, and D in the clamping units on both sides, thereby meeting the welding requirements of different H-beams 4.

[0037] In this embodiment, the clamping mechanism C35 includes a lifting driver A353 fixedly mounted on the bracket 31, a support plate A352 fixedly connected to the lifting driver A353, and at least one guide rod A351 fixedly mounted on the support plate A352. The output shaft A of the lifting driver A353 passes through the support plate A352 and rotates or drives a push plate A354 for abutting against the web plate. The lifting output shaft drives the push plate A354 to slide back and forth along the guide rod A351. In this embodiment, clamping mechanisms C35 and B34 are horizontally installed, while clamping mechanisms A32 and D36 are vertically installed. They have the same structure, the only difference being the shape and thickness of the push plate.

[0038] In this embodiment, when the output shaft of the lifting driver A353 and the push plate A354 are connected by an axial rotation or a spherical rotation structure, the lifting driver A353 can be any one of an electric push cylinder, a pneumatic cylinder, or a hydraulic cylinder.

[0039] In this embodiment, when the output shaft of the lifting driver A353 and the push plate A354 adopt a drive connection structure, the lifting driver A353 adopts a servo motor with a threaded output shaft.

[0040] In order to better eliminate the uneven force caused by rigid contact and the possible indentation on the surface of H-beam 4, in this embodiment, a wear-resistant layer is fixedly provided on one end of the push plate A354 near the web. The wear-resistant layer is made of any one of soft plastic, rubber and flexible composite material.

[0041] Example 3: This embodiment, based on embodiment 2, provides a specific structure for a clamping mechanism D, as detailed in the appendix to the specification. Figure 3 As shown, the clamping mechanism D36 includes a lifting driver B361 fixedly mounted on the bracket 31, a support plate B363 fixedly mounted on the housing of the lifting driver B361, at least one guide rod B362 vertically fixedly mounted on the support plate B363, and a pressing plate B364 parallel to the support plate B363 and slidably disposed on the guide rod B362 for pressing the upper wing plate. The pressing plate B364 is rotatably or drivenly connected to the output shaft B of the lifting driver B361. A boss is provided on the upper end face of the pressing plate B364 away from the upper wing plate to prevent horizontal misalignment of the upper wing plate.

[0042] In this embodiment, when the push plate B364 and the output shaft B of the lifting driver B361 are connected by a drive, the lifting driver B361 is a servo or stepper motor, and the output shaft B is a lead screw.

[0043] In this embodiment, when the push plate B364 and the lifting driver B361 are rotatably connected, the lifting driver B361 is any one of an electric cylinder, a pneumatic cylinder, and a hydraulic cylinder.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding device for H-beam steel frames, characterized in that, It includes multiple clamping devices (3) arranged in a straight line for clamping H-beams, and welding mechanism A (1) and welding mechanism B (2) symmetrically distributed on both sides of the clamping devices (3) for welding both sides of the H-beams in the length direction. The welding mechanism A (1) includes a guide rail (11) fixedly installed on the ground and a drive slide (12) slidably installed on the guide rail (11). A welding arm (13) is installed on the drive slide (12).

2. The H-beam steel frame welding device according to claim 1, characterized in that, The clamping device (3) includes a bracket (31) fixedly installed on the ground, and clamping units symmetrically distributed and fixedly installed on both sides of the bracket (31). The clamping units are respectively provided with clamping mechanism A (32), clamping mechanism B (34), clamping mechanism C (35) and clamping mechanism D (36) from bottom to top. The clamping mechanism A (32) and clamping mechanism B (34) are respectively defined to position and fix the horizontal and vertical positions of the lower wing plate, the clamping mechanism C (35) is defined to position and fix the horizontal position of the web plate, and the clamping mechanism D (36) is defined to position and fix the vertical position of the upper wing plate.

3. The H-beam steel frame welding device according to claim 2, characterized in that, The clamping mechanism C (35) includes a lifting driver A (353) fixedly mounted on a bracket (31), a support plate A (352) fixedly connected to the lifting driver A (353), at least one guide rod A (351) fixedly mounted on the support plate A (352), the output shaft A of the lifting driver A (353) passes through the support plate A (352) and rotates or drives a push plate A (354) for abutting against the web plate, and the lifting output shaft drives the push plate A (354) to slide back and forth along the guide rod A (351).

4. The H-beam steel frame welding device according to claim 3, characterized in that, The push plate A (354) is fixedly provided with a wear-resistant layer at one end near the web plate. The wear-resistant layer is made of any one of soft plastic, rubber and flexible composite material.

5. The H-beam steel frame welding device according to claim 2, characterized in that, The clamping mechanism D (36) includes a lifting driver B (361) fixedly mounted on a bracket (31), a support plate B (363) fixedly mounted on the housing of the lifting driver B (361), at least one guide rod B (362) vertically fixedly mounted on the support plate B (363), and a push plate B (364) parallel to the support plate B (363) and slidably mounted on the guide rod B (362) for pressing the upper wing plate. The push plate B (364) is rotatably or drivenly connected to the output shaft B of the lifting driver B (361).

6. The H-beam steel frame welding device according to claim 3, characterized in that, The upper end face of the push plate A (354) is provided with a boss on the side away from the upper wing plate to prevent the upper wing plate from moving horizontally.

7. The H-beam steel frame welding device according to claim 3, characterized in that, When the output shaft of the lifting drive A (353) and the push plate A (354) are connected by an axial rotation or a spherical rotation structure, the lifting drive A (353) can be any one of an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder.

8. The H-beam steel frame welding device according to claim 3, characterized in that, When the output shaft of the lifting driver A (353) and the push plate A (354) adopt a drive connection structure, the lifting driver A (353) adopts a servo motor with a threaded output shaft.

9. The H-beam steel frame welding device according to claim 5, characterized in that, When the push plate B (364) and the output shaft B of the lifting driver B (361) are connected by a drive, the lifting driver B (361) is a servo or stepper motor, and the output shaft B is a lead screw.

10. The H-beam steel frame welding device according to claim 5, characterized in that, When the push plate B (364) and the lifting drive B (361) are rotatably connected, the lifting drive B (361) is any one of an electric push cylinder, a pneumatic cylinder, and a hydraulic cylinder.

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