A welding device for welding a strip break

Abstract

The application provides a welding device for welding a broken strip of a strip steel, and belongs to the field of welding equipment. The welding device comprises a moving frame, a pressing component and a welding head. The moving frame comprises an upper frame body and a lower frame body which are arranged in parallel and are spaced apart. The upper frame body and the lower frame body are connected at one end and are freely suspended at the other end. The pressing component is arranged on the moving frame. A guide rail is arranged on the upper frame body along the suspended direction of the upper frame body. The welding head is slidably arranged on the guide rail. When welding, the two ends of the strip steel after being broken are overlapped and extend into the internal space of the moving frame from the suspended end of the moving frame. The welding head slides along the guide rail and then welds the broken part of the strip steel. The primary effect achieved by the above technical scheme is that the welding device can be quickly put into operation by moving the whole machine to the broken part, thereby meeting the requirement of rapid repair. Meanwhile, the welding device can be laterally sleeved into or pushed into the broken part position, so that the strip steel is always welded without being separated from the production line.

Description

Technical Field

[0001] This application relates to the field of welding equipment for thin strip steel, and more specifically, to a welding apparatus for welding broken strip steel. Background Technology

[0002] Strip breakage is a common failure in the processing of cold-rolled strip steel and the production of silicon steel. This is because strip steel is typically pulled forward from one end using a drawing device during production. Furthermore, since strip steel is a thin steel sheet with a thickness of 0.2mm-2mm, breakage frequently occurs during the drawing process. Areas with surface defects in the strip are particularly prone to breakage.

[0003] To ensure that the strip steel remains on the production line and can continue to be pulled forward by the traction device, current technology typically involves stopping the production line and performing manual welding directly on the line to resolve strip breakage issues. After welding, the strip steel is then pulled forward by the traction device. However, manual welding suffers from problems such as long welding time, difficulty in guaranteeing welding quality, and poor consistency. Furthermore, the time-consuming process of stopping the production line for welding impacts production progress and increases production costs. Summary of the Invention

[0004] The purpose of this application is to provide a welding apparatus for welding broken strip steel, which at least solves the problems mentioned in the background art.

[0005] Specifically, a welding device for welding broken strip steel is provided, characterized in that it includes a movable frame, a guide rail, a clamping component, and a welding head. The movable frame includes an upper frame and a lower frame arranged parallel to each other and spaced apart. The upper and lower frames are connected at one end and freely extend outwards at their other ends without being connected to each other to form an open end of the movable frame. The guide rail is disposed on the upper frame and arranged along the extension direction of the upper frame. The clamping component is disposed on the movable frame for clamping the strip steel to the lower frame. The welding head is slidably disposed on the guide rail. During welding, the two broken strip steels overlap and extend from the open end of the movable frame between the upper and lower frames. The welding head slides along the guide rail to weld the broken strip steel.

[0006] In feasible solutions, a slide is included, which is slidably mounted on a guide rail, and a clamping component and a welding head are mounted on the slide.

[0007] In the feasible solution, the clamping component includes a connecting frame and a pressure roller. One end of the connecting frame is connected to the slide, and the other end of the connecting frame is connected to the pressure roller. The rotation axis of the pressure roller is perpendicular to the moving direction of the welding head. The pressure roller is located on one or both sides of the welding head along the moving direction of the welding head. When the welding head moves along the guide rail and welds, the pressure roller rolls and clamps the strip steel.

[0008] In an feasible embodiment, the clamping component also includes a lifting adjustment component, which is disposed on the slide. The power output end of the lifting adjustment component is connected to the connecting frame, driving the connecting frame to adjust the height of the pressure roller.

[0009] In the feasible solution, the connecting frame is rotatably mounted on the slide, and the axis of the rotation center of the connecting frame is perpendicular to the direction of movement of the welding head. The connecting frame has a first end and a second end, which are located on both sides of the rotation center of the connecting frame. The first end of the connecting frame is connected to the power output end of the lifting adjustment component, and the second end is connected to the pressure roller. The lifting adjustment component transmits power to the first end of the connecting frame to make it rotate around the rotation center, thereby adjusting the height of the pressure roller at the second end.

[0010] In the feasible solution, the connecting frame includes a rotating plate and a connecting plate, which are rotatably connected to the rotating plate. The power end of the lifting adjustment component is connected to the connecting plate. When the connecting plate is lifted and then the rotating plate is rotated, the connecting plate slides along the guide post. A spring is provided on one side of the connecting plate in the sliding direction. The spring is sleeved on the periphery of the guide post to generate traction between the connecting plate and the slide block.

[0011] In an feasible embodiment, the connecting frame includes a first connecting frame and a second connecting frame, with a mounting plate connected between the second end of the first connecting frame and the second end of the second connecting frame, and the welding head is fixed to the mounting plate by fasteners.

[0012] In the feasible solution, the pressure roller includes two symmetrically arranged first pressure rollers and second pressure rollers, and the connecting frame includes a first connecting frame and a second connecting frame arranged at intervals. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is connected to the second pressure roller. The central axis of the first pressure roller and the central axis of the second pressure roller are at the same height, and the diameter of the first pressure roller is smaller than the diameter of the second pressure roller.

[0013] In an feasible embodiment, the pressure rollers include a first pressure roller and a second pressure roller, which are spaced apart along the direction of movement perpendicular to the welding head. The connecting frame includes a first connecting frame and a second connecting frame spaced apart. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is connected to the second pressure roller. The first pressure roller and the second pressure roller have the same diameter, and the lowest position of the first pressure roller is higher than the lowest position of the second pressure roller.

[0014] In an feasible embodiment, the pressure rollers include a first pressure roller and a second pressure roller, which are spaced apart along the direction of movement perpendicular to the welding head. The connecting frame includes a first connecting frame and a second connecting frame spaced apart. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is slidably connected to the second pressure roller via an adjusting member.

[0015] Compared with the prior art, the beneficial effects of this application include at least the following:

[0016] The primary effect achieved by the above technical solution is that the welding device can be quickly put into operation by moving the entire machine to the break point, thus meeting the needs of rapid emergency repair.

[0017] Secondly, the upper and lower frames are connected at only one end, with the other end freely extending and unconnected, forming a single-sided cantilevered frame structure. This structure allows the welding device to be inserted or pushed into the broken strip location from the side, without removing the strip from the production line or performing significant loosening or winding operations. When the strip is in an lapped state, welding can be completed directly from the cantilevered end into the internal space between the upper and lower frames, effectively adapting to the strip-pulling conditions in cold-rolled and silicon steel production lines where the strip is pulled by a traction device, ensuring that the strip never leaves the production line.

[0018] In addition, the welding device moves along the guide rails of the upper frame, which are coordinated with the sliding of the welding head. This allows for continuous and stable mechanized welding through linear movement on the guide rails, increasing welding speed, reducing operation time, effectively shortening production line downtime, and reducing production losses caused by downtime.

[0019] Meanwhile, the presence of clamping components ensures that the overlapping parts remain tightly fitted during welding, preventing warping, misalignment, or uneven gaps in the thin plates due to thermal deformation or tensile stress. Simultaneously, the lower frame, acting as a support reference surface, provides back support for the thin strip steel, reducing the risk of weld burn-through and improving weld formation quality and consistency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the present application;

[0022] Figure 2 for Figure 1 Front view from perspective A;

[0023] Figure 3 A schematic diagram of the structure in which the clamping components and welding heads are mounted on the slide;

[0024] Figure 4 for Figure 2 Top view;

[0025] Figure 5 for Figure 4 Cross-sectional view of AA;

[0026] Figure 6 for Figure 2 The left view;

[0027] Figure 7 This is a diagram showing the state where the two pressure rollers have different diameters, thus pressing the two strips together.

[0028] Figure 8 This is a schematic diagram of an installation structure where the first and second pressure rollers have the same diameter but different lowest positions.

[0029] Figure 9 A schematic diagram of the installation structure for an adjustable second pressure roller;

[0030] Figure 10 This is a structural diagram of the connecting frame.

[0031] In the diagram: 1. Upper frame, 2. Guide rail, 3. Clamping component, 4. Lower frame, 5. Slide, 6. Drive mechanism, 7. Internal space, 8. Welding head, 9. Mounting plate, 10. Strip steel;

[0032] 301, First connecting frame; 301a, Rotating plate; 301b, Connecting plate; 302, Second pressure roller; 303, First pressure roller; 304, Second connecting frame; 305, Lifting adjustment component; 306, Guide column; 307, Spring. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the devices or elements 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.

[0036] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0037] The welding device of this application can be flexibly moved to the strip steel 10 production line. It integrates the overlapping and pressing of the strip steel 10 with directional sliding welding into a set of special equipment. The strip steel 10 does not need to leave the production line. It directly replaces the existing manual hand welding operation on the production line. It specifically solves the welding problem after the thin strip steel 10 breaks in the production of cold rolling and silicon steel, so that the pulling device can continue to pull it to the subsequent station or pull it out of the production line.

[0038] The specific technical solution is as follows: a welding device for welding broken strip steel, which includes a moving frame, a clamping component 3 and a welding head 8.

[0039] The mobile frame in the technical solution can be a frame with wheels or a frame without wheels. Without wheels, it is transported to the production line for operation; with wheels, it is simply pushed. The aforementioned mobile frame uses an upper frame 1 and a lower frame 4 arranged parallel to each other and spaced apart. The upper frame 1 and lower frame 4 are connected at one end, and freely extend outwards at their respective other ends without being connected, forming an open end of the mobile frame. This single-sided supported cantilever structure forms an open end at the far right of the mobile frame, as shown below. Figure 2 As shown. When the welding device is moved to the broken strip 10, the welding device is pushed into the broken strip position from the side of the strip 10. At this time, the broken strip 10 is located in the internal space 7 between the upper frame 1 and the lower frame 4.

[0040] The clamping component 3 is mounted on the movable frame, and the lower frame 4 serves as a support reference surface to provide back support for the thin strip steel 10. The clamping component 3 and the lower frame 4 cooperate to clamp and position the overlapped thin strip steel 10.

[0041] The aforementioned welding head 8 uses a laser welding gun, which can be directly selected as needed and used directly upon installation. The laser welding gun is mounted on the upper frame 1, with its welding head 8 extending into the internal space 7 between the upper frame 1 and the lower frame 4. The laser welding gun is slidably connected to the upper frame 1. Specifically, guide rails 2 are installed on the upper frame 1. To improve stability, two guide rails 2 are provided, corresponding to two horizontally spaced crossbeams on the upper frame 1. Each guide rail 2 is positioned along the cantilever direction of the upper frame 1. The laser welding gun is slidably connected between the two guide rails 2. Driven by the external drive mechanism 6, the laser welding gun can slide along the guide rails 2. (See [reference needed]). Figure 1 The drive mechanism 6 here can be a motor + screw drive, telescopic cylinder drive, etc. For stability requirements, a motor + screw drive is preferred.

[0042] During welding, the moving frame is pushed in from the side of the overlapping strip 10, that is, the strip 10 enters the internal space 7 of the upper frame 1 and the lower frame 4 from the open entrance at the right end of the moving frame, see [reference]. Figure 2 Then, the clamping component 3 clamps the strip steel 10, and finally the welding head 8 moves along the guide rail 2 to ensure that the initial position of the welding head 8 is aligned with one side edge of the overlapping strip steel 10, and then moves to the other side edge on the opposite side to achieve continuous and stable welding during the movement.

[0043] This application employs two different thickness specifications for laser welding. In practice, for ultra-thin strip steel 10 of 0.2mm-0.5mm, a wireless welding method is generally used. The clamping component 3 forcibly presses the two strip steel 10 pieces at the break point together, and the high-energy laser beam acts directly on the lap interface, causing the interface metal to fuse rapidly, fundamentally avoiding the risk of the ultra-thin strip steel 10 being punctured and ablated due to overheating. For thin strip steel 10 between 0.5mm-2mm, a wired welding method is generally used. The high-energy laser beam simultaneously melts the base material and the welding wire to form a common molten pool, achieving fusion welding.

[0044] The aforementioned mobile frame design further addresses the spatial adaptability issue in online welding. The upper frame 1 and lower frame 4 are connected at only one end, with the other end freely extending and unconnected, forming a single-sided cantilevered frame structure. This structure allows the welding device to be inserted or pushed into the broken strip 10 from the side without removing it from the production line, enabling rapid deployment of the welding device and meeting the needs of quick repairs.

[0045] In addition, the welding device moves in coordination with the welding head 8 sliding on the guide rail 2 of the upper frame 1. By moving linearly on the guide rail 2, continuous and stable mechanized welding is achieved, which increases the welding speed, reduces the operation time, effectively reduces the downtime of the production line, and reduces the production losses caused by downtime.

[0046] Meanwhile, the presence of the clamping component 3 ensures that the overlapping parts remain tightly fitted during welding, preventing the thin plate from warping, misaligning, or having uneven gaps due to thermal deformation or tensile stress. At the same time, the lower frame 4 serves as a supporting reference surface, providing back support for the thin strip steel 10, reducing the risk of weld burn-through, and improving the weld formation quality and welding consistency.

[0047] In some embodiments, the clamping component 3 and the welding head 8 are jointly mounted on a slide 5, see [reference]. Figure 3 The slide block 5 is slidably connected to the guide rail 2 of the upper frame 1, and the clamping component 3 and the welding head 8 maintain a fixed relative position on the slide block 5. During operation, since both the clamping component 3 and the welding head 8 are fixed to the slide block 5, they can achieve completely synchronous movement. When the slide block 5 moves to the predetermined welding position, the clamping component 3 clamps and fixes the strip steel 10 while the welding head 8 reaches the required initial welding position (including the height and horizontal position of the welding head 8). Subsequently, a stable and continuous welding operation is carried out by moving the welding head 8. During continuous welding, the clamping component 3 always moves at a constant speed along the guide rail 2 together with the welding head 8. The clamping point and the welding point always maintain a constant relative distance and migrate synchronously. The clamping component 3 moves closely following the welding head 8, ensuring that the welding heat-affected zone is always under effective clamping constraint, thereby suppressing workpiece warping deformation caused by heat input during welding. Furthermore, since both are on the slide block 5 and share the same moving reference, there is no need to position them separately, reducing cumulative positioning errors and improving the repeatability of the welding trajectory.

[0048] In some embodiments, the structure of the aforementioned clamping component 3 may include a connecting frame and a pressure roller. The connecting frame is connected between the slide 5 and the pressure roller. Specifically, the upper end of the connecting frame and the slide 5 may be fixedly connected or movably connected, for example, sliding or rotating. The lower end of the connecting frame extends downward or laterally and is rotatably connected to the pressure roller, ensuring that the pressure roller can rotate relative to the connecting frame. The pressure roller is arranged on the front and / or rear side of the welding head 8 in the direction of movement of the welding head 8 (with the welding direction as the front). Alternatively, a set of pressure rollers may be provided on both the front and rear sides simultaneously. See [reference needed]. Figure 3 and Figure 4 The pressure roller obtains a fixed position or an adjustable position relative to the slide block 5 through the connecting frame, but always maintains a fixed relative position with the welding head 8.

[0049] The pressure rollers contact the strip 10 by rolling instead of sliding, providing continuous clamping force while reducing frictional resistance between the rollers and the surface of the strip 10. When pressure rollers are arranged on both the front and rear sides of the welding head 8, the strip 10 in front and behind the welding head 8 is subjected to pre-pressure and follow-up pressure, which further suppresses warping and misalignment caused by welding thermal deformation.

[0050] In some embodiments, the upper end of the connecting frame is movably connected to the slide 5, such as... Figure 3 As shown, the specific structure of the aforementioned pressing component 3 may also include a lifting adjustment component 305. The lifting adjustment component 305 may be a lead screw nut, cylinder, hydraulic cylinder, electric cylinder, etc. By operating the lifting adjustment component 305, the connecting frame can be driven to move vertically relative to the slide block 5, thereby precisely adjusting the height position of the pressure roller relative to the upper frame 1, and thus adapting to the pressing of strip steel 10 of different thicknesses. For example, when welding 0.5-2mm strip steel 10, the lifting adjustment component raises the pressure roller a certain distance to increase the gap between the pressure roller and the lower frame 4, adapting to the overall thickness of the strip steel 10; when welding thinner strip steel 10, such as 0.2-0.5mm strip steel 10, the lifting adjustment component lowers the pressure roller a certain distance to reduce the gap between the pressure roller and the lower frame 4. By setting up the lifting adjustment component 305, the operator can conveniently adjust the height position and clamping force of the pressure roller according to the actual thickness and material of the strip steel 10 to be welded. This makes the device flexible and applicable to welding strip steel 10 of different specifications, with strong versatility and reduced equipment investment costs.

[0051] In some embodiments, the connecting bracket is rotatably mounted on the slide 5, such as... Figure 10 As shown, the axis of the rotation center of the connecting frame is perpendicular to the direction of movement of the welding head 8. The connecting frame has a first end and a second end, located on opposite sides of its rotation center. The first end of the connecting frame is connected to the power output end of the lifting adjustment component 305, and the second end is connected to the pressure roller. The power generated by the lifting adjustment component 305 is transmitted to the first end through its power output end, pushing the connecting frame to rotate around the rotation center. The second end, located on the other side of the rotation center, then produces a corresponding arc displacement, thereby causing the pressure roller to change its height position. The core of this technical solution lies in using the lever principle to indirectly adjust the height of the pressure roller. The connecting frame acts as the lever body, and the rotation center on the slide 5 acts as the fulcrum. The first end and the second end are located on opposite sides of the fulcrum, forming two lever arms. The lifting adjustment component 305 provides a linear or curved driving force to the first end, causing the connecting frame to rotate around the fulcrum. Since the first end and the second end are located on opposite sides of the rotation center, their directions of movement are opposite. When the first end is pushed up / down, the second end swings down / up accordingly. The pressure roller installed on the second end thus gains a lifting stroke, achieving adjustment of the pressing height of the workpiece.

[0052] Through the above technical solutions, the technical effects of optimizing spatial layout, improving adjustment accuracy, improving stress conditions, and enhancing operational stability are achieved. Since the lifting adjustment component 305 and the pressure roller are respectively arranged on both sides of the rotating center of the connecting frame, the lifting adjustment component 305 can be installed in a relatively spacious location, while the pressure roller is precisely positioned at the working position where the pressing action needs to be performed. The entire pressing component 3 has a more compact structure, effectively reducing the space occupied in the width or height direction of the equipment. Based on the proportional relationship of the lengths of the two lever arms, different lever arm ratios can be designed to amplify or reduce the displacement, allowing the larger stroke at the output end of the lifting adjustment component 305 to be converted into a small, precise adjustment at the pressure roller end, or the small movement of the lifting adjustment component 305 to be converted into a significant height change at the pressure roller end, thus flexibly adapting to pressing operations with different precision requirements. The rotational motion of the connecting frame around the rotating center provides a smooth lifting trajectory for the pressure roller, avoiding the skew or jamming that may result from direct linear drive, ensuring the smoothness of the pressure roller's movement during height adjustment and pressing.

[0053] In some embodiments, the structure of the connecting frame specifically includes a rotating plate 301a and a connecting plate 301b, such as... Figure 10 As shown, the rotating plate 301a is rotatably mounted on the slide block 5. One end of the connecting plate 301b is a cylindrical pin structure, which extends into the inner hole of the rotating plate and forms a rotatable connection with the rotating plate 301a. A guide post 306 is provided between the connecting plate 301b and the slide block 5. The guide post 306 provides linear sliding guidance for the connecting plate 301b, allowing the connecting plate 301b to slide only axially relative to the slide block 5. The power output end of the lifting adjustment component 305 is connected to the connecting plate 301b. When the lifting adjustment component 305 outputs power, the power is first transmitted to the connecting plate 301b, which slides in a predetermined direction under the constraint of the guide post 306. To ensure that the linear sliding of the connecting plate 301b drives the rotating plate 301a to rotate around the rotation center, the connecting plate 301b and the rotating plate 301a are connected by a revolute joint to avoid jamming or interference between them at this point. A spring 307 is provided on one side of the connecting plate 301b along the sliding direction of the guide post 306. The spring 307 can be located on the upper or lower side of the connecting plate 301b, preferably on the lower side. It operates in a compressed state, allowing the spring 307 to be directly placed between the slide 5 and the connecting plate 301b without needing to connect to either, simplifying the assembly and disassembly process. When located on the upper side of the connecting plate 301b, one end of the spring 307 is connected to the slide 5, and the other end is connected to the connecting plate 301b. It operates in a stretched state. (See Figure 1). Figure 5The spring 307 is sleeved around the outer periphery of the guide post 306. The two ends of the spring 307 act on the connecting plate 301b and the slide block 5 respectively, thereby generating an elastic traction force between the connecting plate 301b and the slide block 5.

[0054] The above technical solution employs a structure in which the connecting plate 301b and the rotating plate 301a are separately and rotatably connected, and a guide post 306 is provided between the connecting plate 301b and the slide block 5. The linear driving force of the lifting adjustment component 305 is directionally received by the connecting plate 301b along the guide post 306, and then the linear motion is smoothly transitioned to the rotational motion of the rotating plate 301a through the rotating pair between the connecting plate 301b and the rotating plate 301a. See [link to relevant documentation]. Figure 10 The guide post 306 ensures the accuracy of the sliding direction of the connecting plate 301b, while the rotating pair between the connecting plate 301b and the rotating plate 301a can automatically adapt to and compensate for the trajectory deviation between linear and arc motion, eliminating the lateral constraints and interference that may be caused by rigid direct hinges, making the transmission chain run more smoothly and significantly reducing the risk of mechanism jamming and abnormal wear. The spring 307, sleeved around the guide post 306, establishes an elastic traction relationship between the connecting plate 301b and the slide block 5. This traction force provides a flexible position holding force for the connecting plate 301b and the rotating plate 301a. When the lifting adjustment component 305 drives the connecting plate 301b to slide, the spring 307 absorbs and releases the impact energy during the driving process through elastic deformation, avoiding the direct transmission of rigid force to the pressure roller. After the pressure roller contacts the workpiece, the elastic effect of the spring 307 makes the clamping force no longer solely determined by the rigid positioning of the lifting adjustment component 305, but is transformed into an elastic clamping force controlled by the compression of the spring 307, forming a flexible clamping effect. When there are slight undulations on the workpiece surface, the spring 307 can adaptively compensate through its own extension and contraction to maintain a basically constant clamping force, thereby significantly improving the stability, reliability and adaptability of the clamping process to the workpiece surface condition.

[0055] In some embodiments, such as Figure 3 As shown, the connecting frame includes a first connecting frame 301 and a second connecting frame 304. A mounting plate 9 is connected between the second end of the first connecting frame 301 and the second end of the second connecting frame 304. The welding head 8 is fixed to the mounting plate 9 by fasteners, which can be bolts or screws. The angle of the welding head 8 can be adjusted by forming a detachable fixed connection between the fasteners and the mounting plate. Installing the welding head 8 on the connecting frame allows the height of the welding head 8 to be changed simultaneously with the height adjustment of the pressure roller. During operation, the relative position of the welding head 8 to the pressure roller (including both vertical and horizontal directions) is always pre-adjusted. Then, during welding, the welding head 8, together with the pressure roller, undergoes a descent before welding and an ascent after welding. This eliminates the need for a separate lifting mechanism for the welding head 8, simplifying the structure.

[0056] In some embodiments, see Figure 3 and Figure 6 The aforementioned pressure rollers include two symmetrically arranged first pressure rollers 303 and second pressure rollers 302, which are used to press the two strip steels 10 at the breakage point, respectively. The connecting frame includes a first connecting frame 301 and a second connecting frame 304. The first pressure roller 303 is installed at the second end of the first connecting frame 301, and the second pressure roller 302 is installed at the second end of the second connecting frame 304, as shown below. Figure 7 As shown, the central axis of the first pressure roller 303 and the central axis of the second pressure roller 302 are at the same height, and the diameter of the first pressure roller 303 is smaller than the diameter of the second pressure roller 302. The first connecting frame 301 and the second connecting frame 304 are rotatably supported on the slide block 5 via the same rotating shaft or by their respective rotating shafts. Preferably, they are rotatably mounted on the slide block via the same rotating shaft, which simplifies the structural setup. The first connecting frame 301 and the second connecting frame 304 can be connected together to a lifting adjustment component 305, or they can each be connected to a lifting adjustment component 305. The power output end of the lifting adjustment component 305 is connected to the first end of the first connecting frame 301 and the first end of the second connecting frame 304. By having the first pressure roller 303 press on the relatively higher surface of the strip 10 at the break point, and the second pressure roller 302 press on the relatively lower surface of the strip 10 at the break point, this method of pressing with two pressure rollers separately is more suitable for situations where the height of the strip 10 at the overlap point is inconsistent during lap welding. The power output end of the lifting adjustment component 305 simultaneously drives the first connecting frame 301 and the second connecting frame 304 to press the corresponding first pressure roller 303 and second pressure roller 302 to the overlapping position. Since the diameter of the second pressure roller 302 is slightly larger than the diameter of the first pressure roller 303, when the lifting adjustment component 305 rises to the same height, that is, when the second end of the first connecting frame 301 and the second end of the second connecting frame 304 rotates by the same arc, the lowest position of the two pressure rollers is different. The difference in their pressure roller radii is the overlapping thickness. Therefore, when the lifting adjustment component 305 rises to the same height, the first pressure roller 303 and the second pressure roller 302 simultaneously press the two different steel strips at the overlapping position.

[0057] In other embodiments, to enable the two pressure rollers to press the two strips 10 with a slight height difference at the overlap position, the pressure rollers can also be configured as follows: a first pressure roller 303 and a second pressure roller 302 are provided, spaced apart along the direction of movement perpendicular to the welding head 8. The connecting frame includes a first connecting frame 301 and a second connecting frame 304 spaced apart. The second end of the first connecting frame 301 is connected to the first pressure roller 303, and the second end of the second connecting frame 304 is connected to the second pressure roller 302. Figure 8As shown, the lowest position of the first pressure roller 303 is higher than the lowest position of the second pressure roller 302, that is, the first pressure roller 303 and the second pressure roller 302 are the same size. When fixed, it is ensured that the lowest position of the first pressure roller 303 is higher than the lowest position of the second pressure roller 302. In this way, when the lifting adjustment component 305 adjusts the first connecting frame 301 and the second connecting frame 304 at the same time, the first pressure roller 303 presses the strip steel 10 with the relatively higher position, while the second pressure roller 302 presses the strip steel 10 with the relatively lower position.

[0058] In other embodiments, to enable the two pressure rollers to press the two strips 10 with a slight height difference at the overlap position, the pressure rollers can also be configured as follows: the pressure rollers include a first pressure roller 303 and a second pressure roller 302, the first pressure roller 303 and the second pressure roller 302 are spaced apart along the moving direction perpendicular to the welding head 8, and the connecting frame includes a first connecting frame 301 and a second connecting frame 304 spaced apart, the second end of the first connecting frame 301 being connected to the first pressure roller 303, such as... Figure 9 As shown, the second end of the second connecting frame 304 is connected to the second pressure roller 302 via an adjusting component, which is an adjusting bolt. The second pressure roller 302 is slidably connected to the second connecting frame 304 via a slider. The upper end of the adjusting bolt is connected to the second connecting frame 304 via a bearing, and the lower end is threaded to the slider. When the adjusting bolt is rotated, the height of the slider and the second pressure roller 302 can be finely adjusted. Before pressing, the height of the second pressure roller 302 is first adjusted according to the height difference between the two strips 10 at the overlap. Then, the first connecting frame 301 and the second connecting frame 304 are adjusted via the lifting adjusting component 305. While the first pressure roller 303 presses the strip 10 at the higher position, the second pressure roller 302 presses the strip 10 at the lower position. The adjusting bolt allows for adjustment of the second pressure roller 302 at different overlap heights of the strips 10, increasing its range of applications.

[0059] The above description is only a partial 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 apparatus for welding broken strip steel, characterized in that, include: A mobile frame, comprising an upper frame and a lower frame arranged parallel to each other and spaced apart, wherein the upper frame and the lower frame are connected at one end of each other and freely extend out at the other end of each other without being connected to each other to form an open end of the mobile frame; Guide rails are mounted on the upper frame and arranged along the cantilever direction of the upper frame; A clamping component, disposed on the movable frame, is used to clamp the strip steel to the lower frame body; A welding head, which is slidably disposed on the guide rail; During welding, the two strips after the break are overlapped and extend from the open end of the moving frame between the upper frame and the lower frame. The welding head slides along the guide rail to weld the broken strip.

2. The welding apparatus for welding broken strip steel according to claim 1, characterized in that, It includes a slide block slidably disposed on the guide rail, and the clamping component and the welding head are mounted on the slide block.

3. The welding apparatus for welding broken strip steel according to claim 2, characterized in that, The clamping component includes a connecting frame and a pressure roller. One end of the connecting frame is connected to the slide block, and the other end of the connecting frame is connected to the pressure roller. The rotation axis of the pressure roller is perpendicular to the moving direction of the welding head. The pressure roller is located on one or both sides of the welding head along the moving direction of the welding head. When the welding head moves along the guide rail and welds, the pressure roller rolls and clamps the strip steel.

4. The welding apparatus for welding broken strip steel according to claim 3, characterized in that, The clamping component further includes: A lifting adjustment component is provided on the slide block, and the power output end of the lifting adjustment component is connected to the connecting frame to drive the connecting frame and thereby adjust the height of the pressure roller.

5. The welding apparatus for welding broken strip steel according to claim 4, characterized in that, The connecting frame is rotatably mounted on the slide block. The axis of the rotation center of the connecting frame is perpendicular to the direction of movement of the welding head. The connecting frame has a first end and a second end, which are located on opposite sides of the rotation center of the connecting frame. The first end of the connecting frame is connected to the power output end of the lifting adjustment component, and the second end of the connecting frame is connected to the pressure roller. The lifting adjustment component transmits power to the first end of the connecting frame to make it rotate around the rotation center, thereby adjusting the height of the pressure roller at the second end.

6. The welding apparatus for welding broken strip steel according to claim 5, characterized in that, The connecting frame includes a rotating plate and a connecting plate, the connecting plate being rotatably connected to the rotating plate, and a guide post being provided between the connecting plate and the slide. The power end of the lifting adjustment component is connected to the connecting plate. When the connecting plate is lifted and lowered, thereby driving the rotating plate to rotate, the connecting plate slides along the guide post. A spring is provided on one side of the connecting plate in the sliding direction, and the spring is sleeved around the guide post to generate a traction force between the connecting plate and the slide.

7. The welding apparatus for welding broken strip steel according to claim 5, characterized in that, The connecting frame includes a first connecting frame and a second connecting frame. A mounting plate is connected between the second end of the first connecting frame and the second end of the second connecting frame. The welding head is fixed to the mounting plate by fasteners.

8. The welding apparatus for welding broken strip steel according to claim 3 or 4, characterized in that, The pressure rollers include two symmetrically arranged first pressure rollers and second pressure rollers. The connecting frame includes a first connecting frame and a second connecting frame spaced apart. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is connected to the second pressure roller. The central axis of the first pressure roller and the central axis of the second pressure roller are at the same height, and the diameter of the first pressure roller is smaller than the diameter of the second pressure roller.

9. The welding apparatus for welding broken strip steel according to claim 3 or 4, characterized in that, The pressure rollers include a first pressure roller and a second pressure roller, which are spaced apart along the direction of movement perpendicular to the welding head. The connecting frame includes a first connecting frame and a second connecting frame spaced apart. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is connected to the second pressure roller. The first pressure roller and the second pressure roller have the same diameter, and the lowest position of the first pressure roller is higher than the lowest position of the second pressure roller.

10. The welding apparatus for welding broken strip steel according to claim 3 or 4, characterized in that, The pressure rollers include a first pressure roller and a second pressure roller, which are spaced apart along the direction of movement perpendicular to the welding head. The connecting frame includes a first connecting frame and a second connecting frame that are spaced apart. The second end of the first connecting frame is connected to the first pressure roller, and the second end of the second connecting frame is slidably connected to the second pressure roller through an adjusting member.

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