Automatic positioning device and positioning method for butt welding of steel strips

Abstract

This invention belongs to the field of steel strip processing technology, specifically an automatic positioning device and method for weld seam alignment in steel strip butt welding. The device includes a base plate and two steel strip bodies. The positioning device further includes two positioning mechanisms: a third electric push rod, a frame, a fourth electric push rod, a moving plate, a fixed plate, two fifth electric push rods, and two correction rods. The third electric push rod is fixedly installed on the top of the base plate, and the frame is slidably connected to the top of the base plate. This invention uses the positioning mechanisms to independently clamp the two steel strip bodies vertically and horizontally, and correct their alignment front and back. Combined with the third electric push rod driving the frame to move horizontally, precise alignment is achieved, effectively solving the problem of misaligned butt joints caused by swaying and tilting during steel strip transport. Furthermore, the synchronous welding of the welding mechanism and the locking of the welding end of the stabilizing component improve weld quality and welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel strip processing technology, and in particular to an automatic positioning device and method for weld seam alignment in steel strip butt welding. Background Technology

[0002] Steel strip is a narrow and long steel plate produced by steel rolling mills to meet the needs of various industrial sectors in producing various metal or mechanical products. It is widely used in cable armoring, spiral welded pipe manufacturing, and continuous tubing production. In the continuous production process of steel strip, after one roll of steel strip is processed, the head of the next roll of steel strip needs to be welded to the tail of the previous roll to achieve production continuity.

[0003] The quality of butt welding of steel strips directly affects the smooth progress of subsequent processing steps and the quality of the final product. During butt welding, the alignment accuracy of the weld seam is one of the key factors determining the weld quality. Due to the thin and long nature of steel strips, they are prone to swaying and tilting during transportation and processing, leading to misalignment, offset, or even tail-wagging during welding. These alignment deviations can cause quality defects such as misalignment, undercut, and weld deviation in the butt weld seam. In severe cases, they can also result in defects such as scratches, folds, cracks, and burrs on the produced steel strips, not only affecting the production quality of the steel strips but also potentially damaging production equipment and reducing production efficiency.

[0004] In the prior art, some devices only roughly center the steel strip, or the two-point centering structure leads to center deviation, which cannot meet the requirements of high-precision butt welding. In addition, the existing welding mechanism cannot achieve synchronous welding from top to bottom and has low welding efficiency. Therefore, this application proposes an automatic positioning device and positioning method for weld seam centering for steel strip butt welding to solve the above problems. Summary of the Invention

[0005] Based on the existing technologies, some devices only perform rough centering of the steel strip, or the use of a two-point centering structure leads to center deviation, which cannot meet the requirements of high-precision butt welding. In addition, existing welding mechanisms cannot achieve synchronous welding from top to bottom and have low welding efficiency. Therefore, this invention proposes an automatic positioning device and method for weld seam centering in steel strip butt welding.

[0006] The present invention discloses an automatic positioning device for weld seam alignment in steel strip butt welding, comprising a base plate and two steel strip bodies, and the positioning device further comprising: The positioning mechanism comprises two components: a third electric push rod, a frame, a fourth electric push rod, a moving plate, a fixed plate, two fifth electric push rods, and two correction rods. The third electric push rod is fixedly installed on the top of the base plate, and the frame is slidably connected to the top of the base plate. The output shaft of the third electric push rod is fixedly installed on one side of the frame. The fourth electric push rod is fixedly installed on the top inner wall of the frame. The output shaft of the fourth electric push rod is fixedly installed on the top of the moving plate, and the fixed plate is fixedly installed on the inner wall of the frame. The moving plate and the fixed plate respectively cooperate with the top and bottom of the corresponding steel strip body. The two fifth electric push rods are respectively fixedly installed on the front and rear sides of the frame. The output shafts of the two fifth electric push rods are respectively fixedly installed on the sides of the two correction rods that are far apart from each other. The two correction rods respectively contact the front and rear sides of the corresponding steel strip body. The welding mechanism is located on the top of the base plate and cooperates with two steel strip bodies. The welding mechanism is used to perform synchronous welding on the butt joints of the two steel strip bodies. Using the above structure, two positioning mechanisms independently clamp and adjust the position of the two steel strip bodies. The third electric push rod pushes the frame to move horizontally on the top of the base plate, bringing the mating ends of the two steel strip bodies closer to the welding position. The fourth electric push rod pushes the moving plate down to cooperate with the fixed plate to clamp the steel strip bodies from the top and bottom. The two fifth electric push rods push the two correction rods to contact the steel strip bodies from the front and rear sides and push the offset steel strips back to the center position. This achieves bidirectional precise positioning of the steel strip bodies in both the top and bottom and front and back directions, solving the problem of misaligned mating caused by swaying and tilting during steel strip transportation.

[0007] Preferably, two guide rollers are rotatably connected to the top of the base plate. The top of the guide rollers is rolledly connected to the bottom of the corresponding steel strip body. By rotatably connecting the two guide rollers to the top of the base plate and rollingly connecting the top of the guide rollers to the bottom of the corresponding steel strip body, the steel strip body passes over the top of the guide rollers before entering the positioning mechanism. The guide rollers lift the steel strip body from below, so that the steel strip maintains a stable height reference during the conveying process. The guide rollers rotate freely with the conveying direction of the steel strip body, changing sliding friction into rolling friction and reducing wear on the bottom of the steel strip. The two guide rollers are respectively set in front of the two positioning mechanisms so that the steel strip bodies entering each positioning mechanism have the same height reference plane, ensuring the consistency of the vertical position of the two steel strip bodies when docking. The supporting effect of the guide rollers also reduces the sagging deformation of the steel strip body under the action of gravity.

[0008] Preferably, two sliders are fixedly installed at the bottom of the frame, and four grooves are opened at the top of the base plate. The sliders are slidably connected in the corresponding grooves. With two sliders fixedly installed at the bottom of the frame and four grooves opened at the top of the base plate, the sliders are slidably connected in the corresponding grooves. When the third electric push rod pushes the frame to move horizontally, the sliders slide synchronously along the grooves. The grooves provide precise linear guidance for the frame to prevent the frame from swaying or tilting during movement. This ensures that when the two positioning mechanisms move in opposite directions, the correction rod is always parallel to the conveying direction of the steel belt body. The cooperation between the grooves and the sliders also bears part of the weight of the frame and the internal clamping components, reducing the vertical load on the third electric push rod. Each frame is supported by two sliders, making the movement more stable and reliable.

[0009] Preferably, two telescopic rods are fixedly installed on the top of the movable plate, and the top ends of the two telescopic rods are fixedly installed on the top inner wall of the frame. By fixing the two telescopic rods on the top of the movable plate and fixing the top ends of the two telescopic rods on the top inner wall of the frame, the telescopic rods extend and retract accordingly when the fourth electric push rod pushes the movable plate to rise and fall. The telescopic rods provide precise vertical guidance for the movable plate to prevent the movable plate from swaying forward and backward or tilting left and right during the lifting and falling process. This ensures that the anti-slip pad at the bottom of the movable plate is always parallel to the anti-slip pad at the top of the fixed plate, so that the clamping force is evenly distributed in the width direction of the steel strip body. The two telescopic rods are symmetrically arranged on both sides of the top of the movable plate to balance the lifting force, reduce the lateral load on the fourth electric push rod, and extend the service life of the electric push rod.

[0010] Preferably, anti-slip pads are fixedly installed on the bottom of the movable plate and the top of the fixed plate. The sides of the two anti-slip pads that are close to each other are in contact with the top and bottom of the corresponding steel strip body, respectively. By fixing anti-slip pads on the bottom of the movable plate and the top of the fixed plate, and with the sides of the two anti-slip pads that are close to each other in contact with the top and bottom of the steel strip body, the anti-slip pads are made of elastic material with a high coefficient of friction. When the movable plate and the fixed plate clamp the steel strip body, they directly contact the surface of the steel strip, increasing the friction between the clamping surface and the steel strip and preventing the steel strip from sliding longitudinally due to external forces during positioning and welding. The elastic material avoids the hard movable plate and the fixed plate from directly squeezing the surface of the steel strip, causing indentations or damage. The deformation of the anti-slip pads can also compensate for the slight unevenness of the steel strip surface, so that the clamping force is evenly distributed on the clamping surface. The anti-slip pads are removable and replaceable. When the surface is worn, they are replaced in time to ensure the clamping reliability for long-term use.

[0011] Preferably, slip rings are fixedly installed at the bottom ends of both correction rods, and slide rods are fixedly installed on the inner wall of the frame. Both slip rings are slidably sleeved on the slide rods. When the fifth electric push rod pushes the correction rods to move back and forth, the slip rings slide synchronously along the slide rods. The slide rods provide precise linear guidance for the correction rods to prevent them from deviating or swaying during movement, ensuring that the contact surfaces of the two correction rods are always parallel to the side of the steel strip body, and that the direction of the correction force is perpendicular to the edge of the steel strip. The cooperation between the slip rings and the slide rods also bears part of the weight of the correction rods, reducing the cantilever load of the fifth electric push rod. The two slip rings correspond to the two correction rods respectively, making the correction actions on the front and rear sides independent and without interference.

[0012] Preferably, the welding mechanism includes a bracket, two electric slide rails, two connecting plates, multiple first electric push rods, and two welding machines. The bottom of the bracket is fixedly installed on the top of the base plate. The two electric slide rails are respectively fixedly installed on the top inner wall and bottom inner wall of the bracket. The two connecting plates are respectively slidably installed on the side of the two electric slide rails that are close to each other. Multiple first electric push rods located on the same side are fixedly installed on one side of the corresponding connecting plate. One side of the welding machine is fixedly installed on the output shaft of the corresponding multiple first electric push rods. Two stabilizing components are provided on the rear inner wall of the bracket. The stabilizing components are used to stably position the welding end of the corresponding steel strip body. The bracket in the connecting mechanism is fixed to the top of the base plate to provide installation support for two electric slide rails. The two electric slide rails drive the two connecting plates to move along the welding direction. Multiple first electric push rods push the welding machine closer to or away from the joint end of the steel strip body. The electric slide rail located above drives the welding machine above to weld the weld from above, and the electric slide rail located below drives the welding machine below to weld the weld from below synchronously. The synchronous welding from top to bottom ensures that the heat input of the weld is symmetrical in the thickness direction, avoiding the warping and deformation of the steel strip caused by the asymmetrical heat input when welding on one side. The synchronous movement of the two welding machines is uniformly controlled by the electric slide rails to ensure that the starting and ending positions of the upper and lower welds are consistent.

[0013] Preferably, the stabilizing assembly includes a mounting frame, multiple second electric actuators, and two clamping plates. The mounting frame is fixedly mounted on the rear inner wall of the support. The upper multiple second electric actuators are fixedly mounted on the top inner wall of the mounting frame, and the lower multiple second electric actuators are fixedly mounted on the bottom inner wall of the mounting frame. One side of each clamping plate is fixedly mounted on the output shaft of the corresponding multiple second electric actuators. The sides of the two clamping plates that are close to each other are in contact with the top and bottom of the corresponding steel strip body, respectively. The mounting frame in the stabilizing assembly, fixed to the rear inner wall of the support, provides a mounting base for the second electric actuators. The upper multiple second electric actuators push upwards... The square clamping plate moves downward, and multiple second electric push rods located below push the lower clamping plate upward. The two clamping plates clamp the area near the welding end of the steel strip body from the top and bottom. When the welding machine is welding, it locks the welding end of the steel strip body in a fixed position to prevent the steel strip end from shifting or warping due to welding thermal stress. The multiple second electric push rods are distributed along the width direction of the steel strip body so that the clamping force is evenly distributed on the entire width of the clamping plate. After the welding is completed, the two clamping plates are released so that the welded steel strip can continue to be conveyed forward. The stabilizing component and the positioning mechanism work together to form a multi-point fixation of the steel strip body during the welding process, which improves the overall stability during welding.

[0014] This invention also proposes a positioning method for an automatic weld seam alignment and positioning device for butt welding of steel strips, comprising the following steps: S1: Connect the electric slide rail, the first electric push rod, the welding machine, the second electric push rod, the third electric push rod, the fourth electric push rod, and the fifth electric push rod to an external power source. Feed the two steel strip bodies from above the two guide rollers respectively. The guide rollers rotate freely during the conveying of the steel strip bodies and lift the steel strip bodies from below. The two steel strip bodies pass through their respective positioning mechanisms. S2: Activate the fourth electric push rod. The fourth electric push rod pushes the moving plate down. The moving plate drives the anti-slip pad down and presses it against the top of the steel strip body. The bottom of the steel strip body contacts the anti-slip pad on the top of the fixed plate. The moving plate and the fixed plate clamp the steel strip body from the top and bottom. S3: Activate the two fifth electric push rods. The two fifth electric push rods push the two correction rods to move closer to the steel strip body. The two correction rods contact the sides of the steel strip body from the front and rear sides and push the steel strip body to the center position inside the frame. S4: After the two positioning mechanisms clamp and correct the two steel strip bodies respectively, the two third electric push rods are activated. The two third electric push rods push the corresponding frames to move horizontally. The two frames drive the docking ends of the two steel strip bodies to move closer to each other and to the welding position. S5: After the two steel strip bodies reach the welding position, the upper and lower second electric push rods in the stabilizing assembly are activated. The upper second electric push rods push the upper clamping plate downward, and the lower second electric push rods push the lower clamping plate upward. The two clamping plates contact and clamp the area near the welding end of the two steel strip bodies from the upper and lower directions respectively. S6: Start the welding mechanism. Two electric slide rails drive two connecting plates to move along the welding direction. The upper connecting plate drives multiple first electric push rods and the upper welding machine to move. The lower connecting plate drives multiple first electric push rods and the lower welding machine to move. After the two welding machines move to the joint end position of the two steel strip bodies, multiple first electric push rods push the welding machines closer to the joint end. The upper welding machine welds the weld from above, and the lower welding machine welds the weld from below simultaneously. S7: After welding is completed, multiple first electric push rods drive two welding machines to retreat and reset, two electric slide rails drive two connecting plates to reset, multiple second electric push rods in the stabilizing assembly drive two clamping plates to loosen the steel strip body, the fourth electric push rod in the two positioning mechanisms drives the moving plate to rise, two fifth electric push rods drive two correction rods to retreat, two third electric push rods drive two frames to retreat and reset, and the welded steel strip body is sent out from the two positioning mechanisms and continues to be conveyed forward.

[0015] The beneficial effects of this invention are: 1. Two positioning mechanisms independently clamp and adjust the position of the two steel strip bodies. The third electric push rod pushes the frame to move horizontally on the top of the base plate, bringing the docking ends of the two steel strip bodies closer to the welding position. The fourth electric push rod pushes the moving plate down to cooperate with the fixed plate to clamp the steel strip bodies from the top and bottom. The two fifth electric push rods push the two correction rods to contact the steel strip bodies from the front and rear sides and push the offset steel strips back to the center position. This achieves bidirectional precise positioning of the steel strip bodies in the top and bottom and front and back directions, solving the problem of misaligned docking caused by shaking and tilting during steel strip conveying. 2. The bracket in the welding mechanism is fixed to the top of the base plate to provide installation support for the two electric slide rails. The two electric slide rails drive the two connecting plates to move along the welding direction. Multiple first electric push rods push the welding machine closer to or away from the docking end of the steel strip body. The electric slide rail located above drives the welding machine above to weld the weld from above, and the electric slide rail located below drives the welding machine below to weld the weld from below synchronously. The synchronous welding from top to bottom makes the heat input of the weld symmetrical in the thickness direction, avoiding the warping and deformation of the steel strip caused by the asymmetrical heat input when welding on one side. The synchronous movement of the two welding machines is uniformly controlled by the electric slide rails to ensure that the starting and ending positions of the upper and lower welds are consistent. 3. The mounting bracket in the stabilizing component is fixed to the inner wall of the rear side of the bracket to provide a mounting base for the second electric push rod. The upper second electric push rod pushes the upper clamping plate downward, and the lower second electric push rod pushes the lower clamping plate upward. The two clamping plates clamp the area near the welding end of the steel strip body from the top and bottom. When the welding machine is welding, the welding end of the steel strip body is locked in a fixed position to prevent the steel strip end from being displaced or warped due to welding thermal stress. The multiple second electric push rods are distributed along the width of the steel strip body so that the clamping force is evenly distributed on the entire width of the clamping plate. After the welding is completed, the two clamping plates are released so that the welded steel strip can continue to be conveyed forward. The stabilizing component and the positioning mechanism work together to form a multi-point fixation of the steel strip body during the welding process, which improves the overall stability during welding. This invention uses a positioning mechanism to independently clamp the two steel strip bodies from top to bottom and correct their alignment from front to back. Combined with a third electric push rod driving the frame to move horizontally, it achieves precise centering and effectively solves the problem of misalignment caused by swaying and tilting during steel strip transportation. In conjunction with the synchronous welding of the welding mechanism and the locking of the welding end of the stabilizing component, it improves the weld quality and welding efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of an automatic weld alignment and positioning device for butt welding of steel strips proposed in this invention. Figure 2 This is a right-side view of the welding mechanism of an automatic weld seam centering and positioning device for butt welding of steel strips proposed in this invention. Figure 3 This is a right-side view of the structure of the steel strip body, mounting frame, second electric push rod and clamping plate of an automatic weld seam centering and positioning device for butt welding of steel strips proposed in this invention. Figure 4 This is a right-side view of the structure of the docking mechanism of an automatic weld alignment and positioning device for butt welding of steel strips proposed in this invention. Figure 5 This is a three-dimensional structural diagram of the docking mechanism of an automatic positioning device for weld seam alignment in steel strip butt welding proposed in this invention.

[0017] In the diagram: 1. Base plate; 2. Guide roller; 3. Steel strip body; 4. Bracket; 5. Electric slide rail; 6. Connecting plate; 7. First electric push rod; 8. Welding machine; 9. Mounting frame; 10. Second electric push rod; 11. Clamping plate; 12. Third electric push rod; 13. Frame; 14. Slider; 15. Slide groove; 16. Fourth electric push rod; 17. Moving plate; 18. Fixed plate; 19. Anti-slip pad; 20. Telescopic rod; 21. Fifth electric push rod; 22. Correcting rod; 23. Slip ring; 24. Slide rod. Detailed Implementation

[0018] The present invention will be further explained below with reference to specific embodiments.

[0019] refer to Figures 1-5 This embodiment proposes an automatic positioning device for weld seam alignment in steel strip butt welding, comprising a base plate 1 and two steel strip bodies 3. Two guide rollers 2 are rotatably connected to the top of the base plate 1, and the top of the guide rollers 2 are rolledly connected to the bottom of the corresponding steel strip body 3. Two positioning mechanisms and one welding mechanism are provided on the top of the base plate 1.

[0020] The positioning mechanism includes a third electric push rod 12, a frame 13, a fourth electric push rod 16, a moving plate 17, a fixed plate 18, two fifth electric push rods 21, and two correction rods 22. The third electric push rod 12 is fixedly installed on the top of the base plate 1, and the frame 13 is slidably connected to the top of the base plate 1. The output shaft of the third electric push rod 12 is fixedly installed on one side of the frame 13. Two sliders 14 are fixedly installed at the bottom of the frame 13, and four grooves 15 are formed at the top of the base plate 1, with the sliders 14 slidably connected within the corresponding grooves 15. The fourth electric push rod 16 is fixedly installed on the inner top wall of the frame 13, and its output shaft is fixedly installed on the top of the moving plate 17. Two telescopic rods 20 are fixedly installed on the top of the moving plate 17, with the top ends of both telescopic rods 20 fixedly installed on the inner top wall of the frame 13. The fixed plate 18 is fixedly installed on the inner wall of the frame 13, and the moving plate 17 and the fixed plate 18 respectively cooperate with the top and bottom of the corresponding steel strip body 3. Anti-slip pads 19 are fixedly installed on the bottom of the movable plate 17 and the top of the fixed plate 18. The sides of the two anti-slip pads 19 that are close to each other are in contact with the top and bottom of the corresponding steel strip body 3, respectively. Two fifth electric push rods 21 are fixedly installed on the front and rear sides of the frame 13, respectively. The output shafts of the two fifth electric push rods 21 are fixedly installed on the sides of the two correction rods 22 that are far apart from each other. The two correction rods 22 are in contact with the front and rear sides of the corresponding steel strip body 3, respectively. Slip rings 23 are fixedly installed at the bottom of the two correction rods 22. Slide rods 24 are fixedly installed on the inner wall of the frame 13. The two slip rings 23 are slidably sleeved on the slide rods 24.

[0021] The welding mechanism is located on the top of the base plate 1 and cooperates with two steel strip bodies 3. The welding mechanism includes a bracket 4, two electric slide rails 5, two connecting plates 6, multiple first electric push rods 7, and two welding machines 8. The bottom of the bracket 4 is fixedly installed on the top of the base plate 1. The two electric slide rails 5 are respectively fixedly installed on the top and bottom inner walls of the bracket 4. The two connecting plates 6 are slidably installed on the sides of the two electric slide rails 5 that are close to each other. Multiple first electric push rods 7 located on the same side are fixedly installed on one side of the corresponding connecting plate 6. One side of each welding machine 8 is fixedly installed on the output shaft of the corresponding multiple first electric push rods 7. Two stabilizing components are provided on the rear inner wall of the bracket 4. These stabilizing components are used to stably position the welding ends of the corresponding steel strip bodies 3. The stabilizing assembly includes a mounting frame 9, multiple second electric push rods 10, and two clamping plates 11. The mounting frame 9 is fixedly mounted on the rear inner wall of the bracket 4. The multiple second electric push rods 10 located above are fixedly mounted on the top inner wall of the mounting frame 9, and the multiple second electric push rods 10 located below are fixedly mounted on the bottom inner wall of the mounting frame 9. One side of the clamping plate 11 is fixedly mounted on the output shaft of the corresponding multiple second electric push rods 10. The sides of the two clamping plates 11 that are close to each other are in contact with the top and bottom of the corresponding steel strip body 3, respectively.

[0022] During operation, the steel strip body 3 passes over the top of the guide roller 2 before entering the positioning mechanism. The guide roller 2 lifts the steel strip body 3 from below, maintaining a stable height reference during conveying. The guide roller 2 rotates freely with the conveying direction of the steel strip body 3, converting sliding friction into rolling friction and reducing wear on the bottom of the steel strip. Two guide rollers 2 are respectively positioned in front of the two positioning mechanisms, ensuring that the steel strip body 3 entering each positioning mechanism has the same height reference plane, guaranteeing the consistency of the vertical position of the two steel strip body 3 when docking. At the same time, the supporting effect of the guide roller 2 reduces the sagging deformation of the steel strip body 3 under gravity. The two positioning mechanisms independently clamp and adjust the position of the two steel strip body 3. The third electric push rod 12 pushes the frame 13 to move horizontally on the top of the base plate 1, bringing the docking ends of the two steel strip body 3 closer together to the welding position. When the third electric push rod 12 pushes the frame 13 to move horizontally, the slider 14 slides synchronously along the slide groove 15. The slide groove 15 provides a straight guide for the frame 13, preventing the frame 13 from swaying or tilting during movement. This ensures that the correction rod 22 is always parallel to the conveying direction of the steel strip body 3 when the two positioning mechanisms move in opposite directions. The cooperation between the slide groove 15 and the slider 14 bears part of the weight of the frame 13 and the internal clamping components, reducing the vertical load on the third electric push rod 12. Each frame 13 is supported by two sliders 14, making the movement smooth and reliable. The fourth electric push rod 16 pushes the moving plate 17 down, cooperating with the fixed plate 18 to clamp the steel strip body 3 from the top and bottom. When the fourth electric push rod 16 pushes the moving plate 17 to rise or fall, the telescopic rod 20 extends and retracts accordingly. The telescopic rod 20 provides vertical guidance for the moving plate 17, preventing the moving plate 17 from swaying forward or backward or tilting left or right during the lifting and lowering process. It ensures that the anti-slip pad 19 at the bottom of the moving plate 17 is always parallel to the anti-slip pad 19 at the top of the fixed plate 18, so that the clamping force is evenly distributed in the width direction of the steel belt body 3. The two telescopic rods 20 are symmetrically arranged on both sides of the top of the moving plate 17, so that the lifting and lowering force is balanced and the lateral load of the fourth electric push rod 16 is reduced. The anti-slip pad 19 is made of a high-friction coefficient elastic material. It directly contacts the steel strip surface when the moving plate 17 and fixed plate 18 clamp the steel strip body 3, increasing the friction between the clamping surface and the steel strip. This prevents the steel strip from slipping longitudinally due to external forces during positioning and welding. The elastic material prevents the rigid moving plate 17 and fixed plate 18 from directly pressing on the steel strip surface, causing indentations or damage. The deformation of the anti-slip pad 19 compensates for minor unevenness on the steel strip surface, ensuring the clamping force is evenly distributed on the clamping surface. The anti-slip pad 19 is removable and replaceable, and should be replaced promptly after surface wear to ensure long-term clamping reliability. Two fifth electric push rods 21 respectively push two correction rods 22 to contact the steel strip body 3 from the front and rear sides, pushing the offset steel strip back to the center position, achieving precise bidirectional positioning of the steel strip body 3 in both the vertical and horizontal directions.When the fifth electric push rod 21 pushes the correction rod 22 to move back and forth, the slip ring 23 slides synchronously along the slide rod 24. The slide rod 24 provides a straight guide for the correction rod 22, preventing the correction rod 22 from deviating or swaying during the movement, ensuring that the contact surface of the two correction rods 22 is always parallel to the side of the steel strip body 3, so that the direction of the correction force is perpendicular to the edge of the steel strip. The cooperation between the slip ring 23 and the slide rod 24 bears part of the weight of the correction rod 22, reducing the cantilever load of the fifth electric push rod 21. The two slip rings 23 correspond to the two correction rods 22 respectively, so that the correction actions on the front and rear sides are independent and do not interfere with each other.

[0023] In the welding mechanism, bracket 4 is fixed to the top of base plate 1, providing mounting support for two electric slide rails 5. The two electric slide rails 5 drive two connecting plates 6 to move along the welding direction, and multiple first electric push rods 7 push welding machines 8 closer to or further away from the butt joint of the steel strip body 3. The upper electric slide rail 5 drives the upper welding machine 8 to weld the weld from above, while the lower electric slide rail 5 drives the lower welding machine 8 to weld the weld synchronously from below. This synchronous welding ensures symmetrical heat input in the thickness direction of the weld, preventing warping and deformation of the steel strip caused by asymmetrical heat input during single-sided welding. The synchronous movement of the two welding machines 8 is uniformly controlled by the electric slide rails 5, ensuring that the starting and ending positions of the upper and lower welds are consistent. In the stabilizing assembly, mounting bracket 9 is fixed to the inner rear wall of bracket 4, providing a mounting base for the second electric push rod 10. Multiple upper electric push rods 10 push the upper clamping plate 11 downwards, while multiple lower electric push rods 10 push the lower clamping plate 11 upwards. The two clamping plates 11 clamp the area near the welding end of the steel strip body 3 from both above and below. During welding by the welding machine 8, the welding end of the steel strip body 3 is locked in a fixed position to prevent displacement or warping of the steel strip end due to welding thermal stress. The multiple second electric push rods 10 are distributed along the width of the steel strip body 3, ensuring that the clamping force is evenly distributed across the entire width of the clamping plates 11. The two clamping plates 11 are released after welding, allowing the welded steel strip to continue to be conveyed forward. The stabilizing component works in conjunction with the positioning mechanism to provide multi-point fixation for the steel strip body 3 during welding, improving overall stability during welding.

[0024] This invention also proposes a positioning method for an automatic weld seam alignment and positioning device for butt welding of steel strips, comprising the following steps: S1: Connect the electric slide rail 5, the first electric push rod 7, the welding machine 8, the second electric push rod 10, the third electric push rod 12, the fourth electric push rod 16 and the fifth electric push rod 21 to the external power supply, and feed the two steel strip bodies 3 from above the two guide rollers 2 respectively. The guide rollers 2 rotate freely during the conveying process of the steel strip bodies 3 and lift the steel strip bodies 3 from below. The two steel strip bodies 3 pass through their respective positioning mechanisms. S2: Activate the fourth electric push rod 16. The fourth electric push rod 16 pushes the moving plate 17 down. The moving plate 17 drives the anti-slip pad 19 down and presses it against the top of the steel belt body 3. The bottom of the steel belt body 3 contacts the anti-slip pad 19 on the top of the fixed plate 18. The moving plate 17 and the fixed plate 18 clamp the steel belt body 3 from the top and bottom directions. S3: Activate the two fifth electric push rods 21. The two fifth electric push rods 21 respectively push the two correction rods 22 to move closer to the steel strip body 3. The two correction rods 22 contact the sides of the steel strip body 3 from the front and rear sides and push the steel strip body 3 to the center position inside the frame 13. S4: After the two positioning mechanisms clamp and correct the two steel strip bodies 3 respectively, the two third electric push rods 12 are activated. The two third electric push rods 12 push the corresponding frame 13 to move horizontally. The two frames 13 drive the docking ends of the two steel strip bodies 3 to move closer to each other and move to the welding position. S5: After the joint ends of the two steel strip bodies 3 reach the welding position, the upper and lower second electric push rods 10 in the stabilizing assembly are activated. The upper second electric push rods 10 push the upper clamping plate 11 to move downward, and the lower second electric push rods 10 push the lower clamping plate 11 to move upward. The two clamping plates 11 contact and clamp the area near the welding ends of the two steel strip bodies 3 from the upper and lower directions, respectively. S6: Start the welding mechanism. The two electric slide rails 5 drive the two connecting plates 6 to move along the welding direction. The upper connecting plate 6 drives the multiple first electric push rods 7 and the upper welding machine 8 to move. The lower connecting plate 6 drives the multiple first electric push rods 7 and the lower welding machine 8 to move. After the two welding machines 8 move to the joint end position of the two steel strip bodies 3, the multiple first electric push rods 7 push the welding machine 8 close to the joint end. The upper welding machine 8 welds the weld from above, and the lower welding machine 8 welds the weld from below simultaneously. S7: After welding is completed, multiple first electric push rods 7 drive two welding machines 8 to retract and reset, two electric slide rails 5 drive two connecting plates 6 to reset, multiple second electric push rods 10 in the stabilizing assembly drive two clamping plates 11 to loosen the steel strip body 3, the fourth electric push rod 16 in the two positioning mechanisms drive the moving plate 17 to rise, the two fifth electric push rods 21 drive two correction rods 22 to retract, the two third electric push rods 12 drive two frames 13 to retract and reset, and the steel strip body 3 after welding is sent out from the two positioning mechanisms and continues to be conveyed forward.

[0025] It should be noted that the specific models of electric slide rail 5, first electric push rod 7, welding machine 8, second electric push rod 10, third electric push rod 12, fourth electric push rod 16, and fifth electric push rod 21 used can be selected by those skilled in the art. Furthermore, the electric slide rail 5, first electric push rod 7, welding machine 8, second electric push rod 10, third electric push rod 12, fourth electric push rod 16, and fifth electric push rod 21 mentioned above are all prior art, and will not be elaborated upon in this solution. In addition, the same drive devices in this application are all controlled by the same synchronizer.

[0026] Working principle: In use, firstly, connect the electric slide rail 5, the first electric push rod 7, the welding machine 8, the second electric push rod 10, the third electric push rod 12, the fourth electric push rod 16, and the fifth electric push rod 21 to an external power source. Then, feed the two steel strip bodies 3 from above the two guide rollers 2 respectively. The guide rollers 2 rotate freely during the conveying process of the steel strip bodies 3 and lift the steel strip bodies 3 from below. The two steel strip bodies 3 enter their respective positioning mechanisms. Start the fourth electric push rod 16, which pushes the moving plate 17 down. The moving plate 17 drives the anti-slip pad 19 down and presses it against the top of the steel strip body 3. The bottom of the steel strip body 3 contacts the anti-slip pad 19 on the top of the fixed plate 18. The moving plate 17 and the fixed plate 18 clamp the steel strip body 3 from the top and bottom. Two fifth electric push rods 21 are activated, each pushing one of the two correction rods 22 towards the steel strip body 3. The two correction rods 22 contact the sides of the steel strip body 3 from the front and rear sides, pushing the steel strip body 3 to the center position inside the frame 13. After the two positioning mechanisms clamp and correct the two steel strip bodies 3, two third electric push rods 12 are activated, each pushing the corresponding frame 13 to move horizontally at the top of the base plate 1. The two frames 13 move the mating ends of the two steel strip bodies 3 closer to each other and to the welding position. After the mating ends of the two steel strip bodies 3 reach the welding position, multiple second electric push rods 10 located at the top and bottom of the stabilizing assembly are activated. The upper second electric push rods 10 push the upper clamping plate 11 downward, and the lower second electric push rods 10 push the lower clamping plate 11 upward. The two clamping plates 11 contact and clamp the area near the welding ends of the two steel strip bodies 3 from the top and bottom directions, respectively. The welding mechanism is started, and the two electric slide rails 5 drive the two connecting plates 6 to move along the welding direction. The upper connecting plate 6 drives the multiple first electric push rods 7 and the upper welding machine 8 to move. The lower connecting plate 6 drives the multiple first electric push rods 7 and the lower welding machine 8 to move. After the two welding machines 8 move to the joint end position of the two steel strip bodies 3, the multiple first electric push rods 7 push the welding machine 8 close to the joint end. The upper welding machine 8 welds the weld from above, and the lower welding machine 8 welds the weld from below simultaneously. After welding is completed, multiple first electric push rods 7 drive two welding machines 8 to retract and reset, two electric slide rails 5 drive two connecting plates 6 to reset, multiple second electric push rods 10 in the stabilizing assembly drive two clamping plates 11 to loosen the steel strip body 3, the fourth electric push rod 16 in the two positioning mechanisms drive the moving plate 17 to rise, the two fifth electric push rods 21 drive two correction rods 22 to retract, the two third electric push rods 12 drive two frames 13 to retract and reset, and the welded steel strip body 3 is sent out from the two positioning mechanisms and continues to be conveyed forward.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic positioning device for butt welding of steel strips, comprising a base plate (1) and two steel strip bodies (3), characterized in that, The positioning device also includes: The positioning mechanism comprises two components: a third electric push rod (12), a frame (13), a fourth electric push rod (16), a moving plate (17), a fixed plate (18), two fifth electric push rods (21), and two correction rods (22). The third electric push rod (12) is fixedly installed on the top of the base plate (1), and the frame (13) is slidably connected to the top of the base plate (1). The output shaft of the third electric push rod (12) is fixedly installed on one side of the frame (13), and the fourth electric push rod (16) is fixedly installed on the inner top wall of the frame (13). The output shaft of the electric push rod (16) is fixedly installed on the top of the moving plate (17), and the fixed plate (18) is fixedly installed on the inner wall of the frame (13). The moving plate (17) and the fixed plate (18) are respectively matched with the top and bottom of the corresponding steel strip body (3). The two fifth electric push rods (21) are respectively fixedly installed on the front and rear sides of the frame (13). The output shafts of the two fifth electric push rods (21) are respectively fixedly installed on the side away from each other of the two correction rods (22). The two correction rods (22) are respectively in contact with the front and rear sides of the corresponding steel strip body (3). The welding mechanism is set on the top of the base plate (1). The welding mechanism cooperates with the two steel strip bodies (3) respectively. The welding mechanism is used to perform synchronous welding on the docking ends of the two steel strip bodies (3).

2. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, The top of the base plate (1) is rotatably connected to two guide rollers (2), and the top of the guide rollers (2) is rolledly connected to the bottom of the corresponding steel strip body (3).

3. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, Two sliders (14) are fixedly installed at the bottom of the frame (13), and four grooves (15) are opened at the top of the base plate (1). The sliders (14) are slidably connected in the corresponding grooves (15).

4. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, Two telescopic rods (20) are fixedly installed on the top of the movable plate (17), and the top ends of the two telescopic rods (20) are fixedly installed on the top inner wall of the frame (13).

5. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, Anti-slip pads (19) are fixedly installed on the bottom of the movable plate (17) and the top of the fixed plate (18). The two anti-slip pads (19) are in contact with the top and bottom of the corresponding steel strip body (3) on the side that is close to each other.

6. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, The bottom ends of the two correction rods (22) are fixedly equipped with slip rings (23), and the inner wall of the frame (13) is fixedly equipped with a slide rod (24). The two slip rings (23) are slidably sleeved on the slide rod (24).

7. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 1, characterized in that, The welding mechanism includes a bracket (4), two electric slide rails (5), two connecting plates (6), multiple first electric push rods (7), and two welding machines (8). The bottom of the bracket (4) is fixedly installed on the top of the base plate (1). The two electric slide rails (5) are respectively fixedly installed on the top inner wall and bottom inner wall of the bracket (4). The two connecting plates (6) are respectively slidably installed on the side of the two electric slide rails (5) that are close to each other. Multiple first electric push rods (7) located on the same side are fixedly installed on one side of the corresponding connecting plate (6). One side of the welding machine (8) is respectively fixedly installed on the output shaft of the corresponding multiple first electric push rods (7). Two stabilizing components are provided on the rear inner wall of the bracket (4). The stabilizing components are used to stably position the welding end of the corresponding steel strip body (3).

8. The automatic positioning device for weld seam alignment in steel strip butt welding according to claim 7, characterized in that, The stabilizing component includes a mounting frame (9), multiple second electric push rods (10), and two clamping plates (11). The mounting frame (9) is fixedly installed on the rear inner wall of the bracket (4). The multiple second electric push rods (10) located above are fixedly installed on the top inner wall of the mounting frame (9), and the multiple second electric push rods (10) located below are fixedly installed on the bottom inner wall of the mounting frame (9). One side of the clamping plate (11) is fixedly installed on the output shaft of the corresponding multiple second electric push rods (10). The sides of the two clamping plates (11) that are close to each other are in contact with the top and bottom of the corresponding steel strip body (3), respectively.

9. A positioning method for an automatic weld seam alignment and positioning device for butt welding of steel strips, characterized in that, Includes the following steps: S1: Connect the electric slide rail (5), the first electric push rod (7), the welding machine (8), the second electric push rod (10), the third electric push rod (12), the fourth electric push rod (16) and the fifth electric push rod (21) to the external power supply, and feed the two steel strip bodies (3) from above the two guide rollers (2) respectively. The guide rollers (2) rotate freely during the conveying process of the steel strip bodies (3) and lift the steel strip bodies (3) from below. The two steel strip bodies (3) pass through their respective positioning mechanisms. S2: Activate the fourth electric push rod (16), the fourth electric push rod (16) pushes the moving plate (17) down, the moving plate (17) drives the anti-slip pad (19) down and presses it against the top of the steel strip body (3), the bottom of the steel strip body (3) contacts the anti-slip pad (19) on the top of the fixed plate (18), the moving plate (17) and the fixed plate (18) clamp the steel strip body (3) from the top and bottom directions; S3: Activate the two fifth electric push rods (21), and the two fifth electric push rods (21) push the two correction rods (22) to move towards the steel strip body (3) respectively. The two correction rods (22) contact the sides of the steel strip body (3) from the front and rear sides and push the steel strip body (3) to the center position inside the frame (13); S4: After the two positioning mechanisms clamp and correct the two steel strip bodies (3) respectively, the two third electric push rods (12) are started. The two third electric push rods (12) push the corresponding frame (13) to move horizontally. The two frames (13) drive the docking ends of the two steel strip bodies (3) to approach each other and move to the welding position. S5: After the butt joint of the two steel strip bodies (3) reaches the welding position, the upper and lower second electric push rods (10) in the stabilizing component are activated. The upper second electric push rods (10) push the upper clamping plate (11) to move downward, and the lower second electric push rods (10) push the lower clamping plate (11) to move upward. The two clamping plates (11) contact and clamp the area near the welding end of the two steel strip bodies (3) from the upper and lower directions respectively. S6: Start the welding mechanism. The two electric slide rails (5) drive the two connecting plates (6) to move along the welding direction. The upper connecting plate (6) drives the multiple first electric push rods (7) and the upper welding machine (8) to move. The lower connecting plate (6) drives the multiple first electric push rods (7) and the lower welding machine (8) to move. After the two welding machines (8) move to the docking end position of the two steel strip bodies (3), the multiple first electric push rods (7) push the welding machine (8) to approach the docking end. The upper welding machine (8) welds the weld from above, and the lower welding machine (8) welds the weld from below simultaneously. S7: After welding is completed, multiple first electric push rods (7) drive two welding machines (8) to retreat and reset, two electric slide rails (5) drive two connecting plates (6) to reset, multiple second electric push rods (10) in the stabilizing component drive two clamping plates (11) to loosen the steel strip body (3), the fourth electric push rod (16) in the two positioning mechanisms drive the moving plate (17) to rise, the two fifth electric push rods (21) drive two correction rods (22) to retreat, the two third electric push rods (12) drive two frames (13) to retreat and reset, and the steel strip body (3) after welding is sent out from the two positioning mechanisms and continues to be conveyed forward.

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