A steel strip longitudinal welding apparatus

Abstract

The application relates to a steel strip longitudinal welding device which comprises a first platform, a second platform, a horizontal adjusting mechanism, a clamping mechanism and a welding mechanism. The first platform is provided with rollers. The second platform is vertically lifted by a hydraulic cylinder. The rollers can be conveniently loaded and unloaded when exposed to support the steel strip. The state switching of the platform lifting to provide rigid welding support can be realized. The horizontal adjusting mechanism is arranged on both sides of the device. The longitudinal wheel set is adjusted through a hand wheel screw rod transmission to realize accurate positioning of the transverse position of the steel strip. The left and right clamps of the clamping mechanism are matched with the lower clamp with a strip length scale to complete butt joint positioning of the steel strip. The welding mechanism drives the welding gun to continuously walk along the longitudinal weld through a gear and a rack transmission to realize welding. A surrounding backwater cooling cavity is arranged in the clamp. Compared with the prior art, the device can realize rapid positioning and stable welding of the steel strip, the operation process is smooth, the clamp thermal deformation is effectively avoided, the welding precision and the production efficiency are improved, and the device is suitable for longitudinal butt joint welding operation of various steel strips.

Description

Technical Field

[0001] This application relates to the field of welding equipment technology, and more specifically, to a longitudinal welding device for steel strips. Background Technology

[0002] Steel strip, a commonly used raw material in industrial production, is widely used in many fields such as automobile manufacturing, home appliance production, and building decoration. During the production and processing of steel strip, multiple sections of steel strip often need to be longitudinally spliced ​​and welded to obtain a continuous steel strip of the required length. The quality of the longitudinal welding directly affects the smooth progress of subsequent processing steps and the performance of the final product.

[0003] In existing technologies, longitudinal welding of steel strips is typically performed using manual assisted positioning welding or semi-automatic welding equipment. Manual positioning welding relies heavily on the operator's experience and skills, resulting in poor weld quality stability, low production efficiency, and a tendency to produce problems such as weld misalignment and uneven welds. While semi-automatic welding equipment improves automation to some extent, it still has many shortcomings.

[0004] Existing longitudinal steel strip welding equipment suffers from the following technical defects in practical use: First, the steel strip positioning accuracy is insufficient, making it difficult to achieve precise alignment and resulting in weld position deviation, affecting welding quality. Second, the fixtures are exposed to high temperatures for extended periods during welding, which can easily cause thermal deformation, affecting clamping accuracy and service life. Third, the horizontal adjustment mechanism has low adjustment accuracy and cannot adapt to the welding requirements of steel strips of different widths. Furthermore, the steel strip is prone to displacement during welding, leading to discontinuous welds and poor welding consistency. Finally, the overall structure of the equipment is complex, making operation and maintenance inconvenient and hindering further improvements in production efficiency.

[0005] The aforementioned technical problems severely restrict the improvement of longitudinal welding quality of steel strips, and there is an urgent need for a new type of longitudinal welding equipment for steel strips to solve the many defects in the existing technology. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a longitudinal welding equipment for steel strips, which solves the technical problems of low positioning accuracy of steel strips, severe thermal deformation of fixtures, poor horizontal adjustment accuracy, unstable welding quality, and low production efficiency in the prior art.

[0007] The objective of this application is achieved through the following technical solution: A longitudinal welding device for steel strip includes a first platform, a second platform, a horizontal adjustment mechanism, a clamping mechanism, and a welding mechanism. The first platform has several first transverse openings, and rollers are mounted within each of these openings. The second platform has second transverse openings that mate with the rollers. A hydraulic cylinder is located below the first platform, and the connecting rod of the hydraulic cylinder passes through a through hole on the first platform and is fixedly connected to the bottom of the second platform. Horizontal adjustment mechanisms are located on both sides of the first and second platforms. Each horizontal adjustment mechanism includes a support platform, a sliding block, a lead screw, a handwheel, and a longitudinal wheel assembly. A guide rail is located above the support platform, and the sliding block... The guide rail slides, the lead screw rotates with the sliding block, the longitudinal wheel assembly is positioned above the sliding block, the clamping mechanism includes a hydraulic cylinder and a clamp, the output shaft of the hydraulic cylinder is fixedly connected to the clamp, the clamp includes a left clamp and a right clamp, a gap is provided between the left clamp and the right clamp, a rack is provided on one side of the left clamp, a slide rail is provided above the clamp, the welding mechanism includes a drive motor, a support frame, and a welding torch, the bottom of the support frame slides with the slide rail, the drive motor is fixed to one side of the support frame, a gear is fixed to the output shaft of the drive motor, the gear engages with the rack, the welding torch is fixedly connected to the support frame, and the welding torch is positioned above the gap.

[0008] Preferably, the welding equipment further includes a water tank, and the fixture has a return water cooling chamber inside. The return water cooling chamber is connected to an external water tank through a pipeline, wherein a water pump is installed on the pipeline for circulating cooling water to cool the fixture.

[0009] Preferably, the return water cooling chamber is arranged in a circular manner inside the clamp, and the two ends of the return water cooling chamber are respectively provided with water inlet and water outlet. The water inlet and water outlet are connected to an external water tank through pipelines to form a circulating water circuit.

[0010] Preferably, the clamp is a heat-conducting clamp made of copper or aluminum alloy.

[0011] Preferably, the rollers on the first platform are arranged at equal intervals, the width of the second lateral opening is greater than the diameter of the rollers, and the second platform moves in a vertical direction.

[0012] Preferably, the lead screw of the horizontal adjustment mechanism is provided with bearing seats at both ends, the bearing seats are fixed on the support platform, and the handwheel is provided at one end of the lead screw for driving the lead screw to rotate so as to drive the sliding block to move along the guide rail.

[0013] Preferably, the longitudinal wheel assembly includes a longitudinal wheel, a wheel frame, a telescopic spring, and a support rod. The support rod is fixedly connected above the sliding block, the wheel frame is elastically mounted on the support rod via the telescopic spring, and the longitudinal wheel is rotatably mounted on the wheel frame for rolling guidance along the edge of the steel belt.

[0014] Preferably, the clamping mechanism further includes a lower clamp, the two sides of which are fixedly connected to the second platform. The upper surface of the lower clamp is provided with a centering guide ridge extending along the length direction of the left clamp. The centering guide ridge is located directly below the weld seam of the steel strip. The upper surface of the lower clamp forms symmetrical support surfaces on both sides of the centering guide ridge. The steel strip is placed horizontally on the support surface. The top of the centering guide ridge is lower than the bottom surface of the steel strip. The two sides of the steel strip symmetrically abut against the support surface to achieve horizontal centering positioning of the steel strip, so that the weld seam is aligned with the welding torch trajectory.

[0015] Preferably, the support surface is provided with length markings.

[0016] Preferably, the left and right clamps are respectively provided with positioning protrusions corresponding to the gap, for positioning the steel strip.

[0017] Compared with the prior art, the present invention has the following beneficial effects: First, it offers high positioning accuracy. This invention achieves automatic centering positioning of the steel strip by setting a centering guide ridge and symmetrical support surfaces. Combined with the rolling guidance of the longitudinal wheel set, it ensures precise alignment between the steel strip weld seam and the welding torch trajectory, effectively improving welding positioning accuracy.

[0018] Secondly, the fixture has a long service life. This invention features a surrounding cooling chamber inside the fixture, which uses circulating cooling water to remove the heat generated during welding, effectively preventing thermal deformation of the fixture, improving clamping accuracy, and extending the fixture's service life.

[0019] Third, it is flexible and convenient to adjust. This invention uses a screw-handwheel mechanism to drive a sliding block to move the longitudinal wheel assembly, which can precisely adjust the distance between the two longitudinal wheel assemblies to meet the welding requirements of steel strips of different widths. It has high adjustment accuracy and is easy to operate.

[0020] Fourth, the welding quality is stable. This invention uses a hydraulic cylinder to drive the clamp to tighten the steel strip, and with the positioning action of the positioning cam, it effectively prevents the steel strip from shifting during the welding process, ensuring a continuous and smooth weld with good welding consistency.

[0021] Fifth, high production efficiency. This invention uses a gear and rack transmission mechanism to drive the welding torch to move at a constant speed along the weld seam, achieving automated continuous welding. Combined with a hydraulic cylinder to drive the lifting and lowering of the second platform, it enables rapid loading and unloading of the steel strip, significantly improving production efficiency.

[0022] Sixth, the operating mode is flexible and the welding stability is good. This invention controls the vertical height of the second platform through a hydraulic cylinder, realizing flexible switching between loading / unloading and welding operation. During loading / unloading, the rollers are exposed to support the steel strip, facilitating rapid conveying and unloading of the steel strip, making operation convenient and efficient. During welding, the second platform rises, the rollers are retracted below, and the steel strip falls to the platform support surface. With the help of the clamping mechanism, the steel strip is stably clamped and fixed, avoiding welding vibration caused by the roller support, effectively improving the stability and welding effect of the welding operation. At the same time, this switching structure avoids dragging and friction of the steel strip on the rigid platform, effectively reducing scratches on the surface of the steel strip and improving the appearance quality of the product. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of a longitudinal steel strip welding device provided for some embodiments of this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 A top view of a longitudinal steel strip welding apparatus provided for some embodiments of this application; Figure 4 Another schematic diagram of a longitudinal steel strip welding apparatus provided for some embodiments of this application; Figure 5 Schematic diagrams of the horizontal adjustment mechanism provided for some embodiments of this application; Figure 6 Schematic diagrams of the clamping mechanism provided for some embodiments of this application; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 yes Figure 6 Enlarged view of point C in the middle.

[0024] Icons: 1. First platform; 2. Second platform; 3. First transverse opening; 4. Roller; 5. Second transverse opening; 6. Hydraulic cylinder; 7. Connecting rod; 8. Support platform; 9. Sliding block; 10. Lead screw; 11. Handwheel; 12. Longitudinal wheel assembly; 13. Guide rail; 14. Bearing seat; 15. Longitudinal wheel; 16. Wheel frame; 17. Telescopic spring; 18. Support rod; 19. Hydraulic cylinder; 20. Left clamp; 21. Right clamp; 22. Clearance; 23. Rack; 24. Slide rail; 25. Lower clamp; 26. Support surface; 27. Positioning protrusion; 28. Drive motor; 29. ​​Support frame; 30. Welding torch; 31. Gear; 32. Water tank; 33. Inlet; 34. Outlet. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0026] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0027] See attached document Figure 1-8 The present application provides a longitudinal welding device for steel strip, comprising a first platform 1, a second platform 2, a horizontal adjustment mechanism, a clamping mechanism, and a welding mechanism. The first platform 1 has several first transverse openings 3, each arranged along the length of the first platform 1. Each first transverse opening 3 has a roller 4 mounted inside it. The axis of the roller 4 is perpendicular to the conveying direction of the steel strip, which can realize the smooth rolling conveying of the steel strip. The second platform 2 is arranged vertically and vertically corresponding to the first platform 1. The second transverse opening 5 is provided on its surface, which corresponds one-to-one with the position of the first transverse openings 3. The size of the second transverse opening 5 is adapted to the roller 4, so that the roller 4 can pass through the second transverse opening 5 during the lifting and lowering of the second platform 2, realizing the switching of the support state.

[0028] See attached document Figure 4 Hydraulic cylinder 6 is fixedly installed below the first platform 1. The cylinder body of hydraulic cylinder 6 is placed on the ground. The connecting rod 7 of hydraulic cylinder 6 extends upward, passes through the pre-reserved through hole on the first platform 1, and is fixedly connected to the bottom of the second platform 2. The extension and retraction of hydraulic cylinder 6 can drive the second platform 2 to move vertically, thereby realizing the switching between the loading and unloading state of the equipment and the welding operation state, and providing different support conditions for the loading and unloading of steel strips and welding operations.

[0029] See attached document Figure 3On the left and right sides of the first platform 1 and the second platform 2, symmetrical horizontal adjustment mechanisms are arranged to adjust and guide the lateral position of the steel strip, ensuring that the weld position of the steel strip is precisely aligned with the travel trajectory of the welding torch 30. The horizontal adjustment mechanism mainly consists of a support platform 8, a sliding block 9, a lead screw 10, a handwheel 11, and a longitudinal wheel set 12. A guide rail 13 extending along the length of the first lateral opening 3 is fixedly installed on the upper surface of the support platform 8. The bottom of the sliding block 9 slides in cooperation with the guide rail 13 and can move laterally along the guide rail 13. The lead screw 10 is arranged along the extension direction of the guide rail 13, and a threaded engagement is formed between the rod of the lead screw 10 and the sliding block 9. The rotation of the lead screw 10 can drive the sliding block 9 to move laterally along the guide rail 13, thereby achieving precise adjustment of the lateral position of the steel strip. The longitudinal wheel set 12 is set above the sliding block 9 and can move synchronously with the sliding block 9, guiding and limiting the side of the steel strip to prevent lateral deviation of the steel strip during transportation and welding.

[0030] See attached document Figure 7 The clamping mechanism is used to stably clamp and fix the steel strip during welding operations. It mainly consists of a hydraulic cylinder 19 and a clamp. The output shaft of the hydraulic cylinder 19 is fixedly connected to the clamp. The extension and retraction of the hydraulic cylinder 19 drives the clamp to open and close, thus clamping and releasing the steel strip. The clamp mainly consists of a left clamp 20 and a right clamp 21, which are symmetrically arranged with a gap 22 between them. The position of the gap 22 corresponds to the weld position of the steel strip, providing working space for welding operations. A rack 23 is fixedly installed on one side of the left clamp 20. The extension direction of the rack 23 is consistent with the length direction of the steel strip. A slide rail 24 extending along the length direction of the steel strip is fixedly installed above the clamp, providing stable guidance for the movement of the welding mechanism.

[0031] See attached document Figure 6 The welding mechanism is used to complete the longitudinal continuous welding operation of the steel strip. It mainly consists of a drive motor 28, a support frame 29, and a welding torch 30. The bottom of the support frame 29 is slidably engaged with the slide rail 24 above the fixture, and can move along the extension direction of the slide rail 24. The drive motor 28 is fixedly installed on one side of the support frame 29. A gear 31 is fixedly installed on the output shaft of the drive motor 28. The gear 31 meshes with the rack 23 on the side of the left fixture 20. The drive motor 28 drives the gear 31 to rotate, which allows the gear 31 to move along the rack 23, thereby driving the support frame 29 and the welding torch 30 to move continuously along the slide rail 24. The welding torch 30 is fixedly connected to the support frame 29. The torch head of the welding torch 30 is positioned above the gap 22 between the left fixture 20 and the right fixture 21, and can move synchronously with the support frame 29 to complete the continuous welding operation of the entire weld seam of the steel strip.

[0032] This welding equipment is also equipped with a water tank 32. The fixture has an internal return water cooling chamber, which is connected to the external water tank 32 via pipes. A water pump is installed on the pipes, driving the cooling water in the water tank 32 to circulate between the return water cooling chamber and the water tank 32, continuously cooling the fixture during the welding process. This prevents thermal deformation of the fixture due to the high welding temperature, ensuring the clamping accuracy and service life of the fixture. The return water cooling chamber is arranged in a circular pattern inside the fixture, providing uniform cooling to the entire fixture. Inlet 33 and outlet 34 are located at both ends of the return water cooling chamber, respectively, and are connected to the external water tank 32 via pipes, forming a complete circulating water circuit to ensure uniform and continuous cooling. The fixture is made of copper or aluminum alloy, possessing excellent thermal conductivity to further improve cooling efficiency, while also exhibiting good rigidity and wear resistance to ensure the stability of the clamping operation.

[0033] See attached document Figure 3 The rollers 4 on the first platform 1 are arranged at equal intervals, which can form uniform rolling support for the steel belt and prevent the steel belt from sagging or deforming during the conveying process. The width of the second transverse opening 5 is greater than the diameter of the rollers 4, providing sufficient clearance for the lifting and moving of the second platform 2, ensuring that the second platform 2 can move smoothly in the vertical direction without interfering with the rollers 4.

[0034] See attached document Figure 2 , 5 The lead screw 10 of the horizontal adjustment mechanism is equipped with bearing seats 14 at both ends. The bearing seats 14 are fixedly installed on the upper surface of the support platform 8 to provide stable rotation support for the lead screw 10. The handwheel 11 is fixedly installed on the outer end of the lead screw 10. The operator can drive the lead screw 10 to rotate by rotating the handwheel 11, thereby driving the sliding block 9 and the longitudinal wheel group 12 to move laterally synchronously. The precise adjustment of the lateral position of the steel belt can be completed without additional power. The operation is convenient and the adjustment accuracy is controllable.

[0035] As a preferred embodiment of the present invention, a screw motor is provided at the end of the lead screw, and the rotation of the lead screw is controlled by the screw motor, thereby adjusting the spacing between the longitudinal wheel sets 12. Similarly, the welding equipment also includes a controller, which is electrically connected to the screw motor, hydraulic cylinder 6, and drive motor 28 for better automated control and to improve the efficiency of automated production operations in the welding process.

[0036] The longitudinal wheel assembly 12 includes a longitudinal wheel 15, a wheel frame 16, a telescopic spring 17, and a support rod 18. The support rod 18 is vertically fixed to the upper surface of the sliding block 9. The wheel frame 16 is elastically mounted on the support rod 18 via the telescopic spring 17. The telescopic spring 17 provides good protection for the steel belt and a certain buffer space. The longitudinal wheel 15 is rotatably mounted on the wheel frame 16. The axis of the longitudinal wheel 15 is arranged in the vertical direction and can roll along the side edge of the steel belt. Through the elastic action of the telescopic spring 17, the longitudinal wheel 15 can always be in contact with the side edge of the steel belt, which can guide the steel belt during the conveying process and prevent the steel belt from deviating. At the same time, it can adapt to steel belts of different widths and specifications, thus improving the applicability of the equipment.

[0037] The clamping mechanism also includes a lower clamp 25, which is fixed to the second platform 2 on both sides. The upper surface of the lower clamp 25 is provided with a centering guide protrusion extending along the length of the left clamp 20. The centering guide protrusion is located directly below the weld seam of the steel strip. The upper surface of the lower clamp 25 forms symmetrical support surfaces 26 on both sides of the centering guide protrusion. The steel strip is placed horizontally on the support surface 26. The top of the centering guide protrusion is lower than the bottom surface of the steel strip. The two sides of the steel strip symmetrically abut against the support surface 26, which can realize the horizontal centering positioning of the steel strip, so that the weld seam and the trajectory of the welding gun 30 are automatically aligned. There is no need for repeated manual adjustment of the centering position, which greatly improves the positioning efficiency. The support surface 26 is provided with a length scale, which makes it easy for operators to intuitively confirm the placement position and docking length of the steel strip, further improving the positioning accuracy and operation efficiency.

[0038] As a preferred technical solution, the left clamp 20 and the right clamp 21 are respectively provided with positioning protrusions 27 corresponding to the gap 22. The positioning protrusions 27 can abut against the upper surface of the steel strip to position the steel strip in the upper and lower positions, so as to prevent the steel strip from tilting or shifting in the upper and lower positions during the welding process, further improving the stability of the steel strip clamping and ensuring the uniformity of the welding quality.

[0039] When the equipment is working, the hydraulic cylinder 6 retracts first, causing the second platform 2 to descend. The roller 4 of the first platform 1 is exposed from the second transverse opening 5 and is higher than the upper surface of the second platform 2. The two steel strips to be welded can be easily pushed to the working area through the rolling support of the roller 4, which greatly reduces the drag resistance of the steel strip and the risk of surface scratches.

[0040] After the steel strip is pushed into place, the handwheel 11 of the horizontal adjustment mechanism on both sides is rotated. The sliding block 9 and the longitudinal wheel group 12 are driven to move laterally through the lead screw 10. With the elastic force of the telescopic spring 17, the longitudinal wheel is made to fit against the side of the steel strip, thus completing the lateral centering of the steel strip. At the same time, the length of the docking is confirmed by the length scale of the support surface 26 of the lower clamp 25. The centering guide ridge automatically aligns with the weld position, and the steel strip can be accurately positioned without repeated calibration.

[0041] Hydraulic cylinder 6 lifts the second platform 2, and roller 4 is hidden below the second transverse opening 5. The steel strip falls smoothly onto the support surface 26 of the lower clamp 25. Hydraulic cylinder 19 drives the left and right clamps 21 to press down, and positioning protrusion 27 presses the surface of the steel strip to complete stable clamping. At this time, water tank 32 and water pump start synchronously, and cooling water circulates in the surrounding return water cooling chamber of the clamp, continuously carrying away the high temperature generated by welding and avoiding thermal deformation of the clamp.

[0042] Then the drive motor 28 starts, and through the meshing transmission of gear 31 and rack 23, it drives the support frame 29 to move at a constant speed along the slide rail 24. The welding torch 30 is aligned with the weld seam at the gap 22 of the fixture to complete the continuous welding of the entire longitudinal weld seam. After the welding is completed, the oil cylinder 19 drives the fixture to release, and the hydraulic cylinder 6 retracts to make the roller 4 lift the steel strip again, so that the finished product can be smoothly output through the roller 4, completing the entire operation process.

[0043] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., 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 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 limiting this invention.

[0044] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A longitudinal welding device for steel strips, comprising a first platform (1), a second platform (2), a horizontal adjustment mechanism, a clamping mechanism, and a welding mechanism, characterized in that, The first platform (1) is provided with several first transverse openings (3), and rollers (4) are mounted in the first transverse openings (3). The second platform (2) is provided with second transverse openings (5), and the second transverse openings (5) cooperate with the rollers (4). A hydraulic cylinder (6) is provided below the first platform (1). The connecting rod (7) of the hydraulic cylinder (6) passes through the through hole on the first platform (1) and is fixedly connected to the bottom of the second platform (2). Horizontal adjustment mechanisms are provided on both sides of the first platform (1) and the second platform (2). The horizontal adjustment mechanism includes a support platform (8) and a sliding block (9). The support platform (8) includes a lead screw (10), a handwheel (11), and a longitudinal wheel assembly (12). A guide rail (13) is provided above the support platform (8). The sliding block (9) is slidably engaged with the guide rail (13). The lead screw (10) and the sliding block (9) are rotatably engaged. The longitudinal wheel assembly (12) is located above the sliding block (9). The clamping mechanism includes a hydraulic cylinder (19) and a clamp. The output shaft of the hydraulic cylinder (19) is fixedly connected to the clamp. The clamp includes a left clamp (20) and a right clamp (21). A gap (22) is provided between the left clamp (20) and the right clamp (21). The left clamp... (20) A rack (23) is provided on one side, and a slide rail (24) is provided above the clamp. The welding mechanism includes a drive motor (28), a support frame (29), and a welding torch (30). The bottom of the support frame (29) is slidably engaged with the slide rail (24). The drive motor (28) is fixed to one side of the support frame (29). A gear (31) is fixed to the output shaft of the drive motor (28). The gear (31) engages with the rack (23). The welding torch (30) is fixedly connected to the support frame (29). The welding torch (30) is placed above the gap (22). The clamping mechanism also includes a lower... The clamp (25) is fixed to the second platform (2) on both sides. The upper surface of the lower clamp (25) is provided with a centering guide protrusion extending along the length direction of the left clamp (20). The centering guide protrusion is located directly below the steel strip weld. The upper surface of the lower clamp (25) forms a symmetrical support surface (26) on both sides of the centering guide protrusion. The steel strip is placed horizontally on the support surface (26). The top of the centering guide protrusion is lower than the bottom surface of the steel strip. The two sides of the steel strip symmetrically abut against the support surface (26) to achieve horizontal centering positioning of the steel strip, so that the weld is aligned with the trajectory of the welding gun (30).

2. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The welding equipment also includes a water tank (32). The left clamp (20) and right clamp (21) are provided with a water return cooling chamber. The water return cooling chamber is connected to the external water tank (32) through a pipeline. A water pump is provided on the pipeline to circulate cooling water to cool the left clamp (20) and right clamp (21).

3. The longitudinal welding equipment for steel strips according to claim 2, characterized in that, The return water cooling chamber is arranged in a ring around the inside of the left clamp (20) and the right clamp (21). The two ends of the return water cooling chamber are respectively provided with an inlet (33) and an outlet (34). The inlet (33) and the outlet (34) are connected to the external water tank (32) through pipelines to form a circulating water circuit.

4. The longitudinal welding equipment for steel strips according to claim 2, characterized in that, The left clamp (20) and right clamp (21) are thermally conductive clamps made of copper or aluminum alloy.

5. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The rollers (4) on the first platform (1) are arranged at equal intervals, the width of the second transverse opening (5) is greater than the diameter of the rollers (4), and the second platform (2) moves in the vertical direction.

6. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The lead screw (10) of the horizontal adjustment mechanism is provided with bearing seats (14) at both ends. The bearing seats (14) are fixed on the support platform (8). The handwheel (11) is located at one end of the lead screw (10) and is used to drive the lead screw (10) to rotate so as to drive the sliding block (9) to move along the guide rail (13).

7. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The longitudinal wheel assembly (12) includes a longitudinal wheel (15), a wheel frame (16), a telescopic spring (17), and a support rod (18). The support rod (18) is fixedly connected above the sliding block (9). The wheel frame (16) is elastically mounted on the support rod (18) through the telescopic spring (17). The longitudinal wheel (15) is rotatably mounted on the wheel frame (16) for rolling guidance along the edge of the steel belt.

8. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The support surface (26) is provided with length markings.

9. The longitudinal welding equipment for steel strips according to claim 1, characterized in that, The left clamp (20) and right clamp (21) are respectively provided with positioning protrusions (27) corresponding to the gap (22) for positioning the steel strip.

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