Plasma arc-based steel belt welding and sewing device for continuous production of galvanized sheet

Abstract

The invention discloses a plasma arc-based steel belt welding and sewing device for continuous production of galvanized sheets, and relates to the technical field of production of galvanized sheets. The plasma-arc-based steel belt welding and sewing device for continuous production of the galvanized sheet comprises a welding table and clamp assemblies located on the two sides of the welding table and further comprises a welding execution assembly, and the welding execution assembly comprises a plasma arc cutting head, a flat pressing wheel and a plasma arc welding connector. The head ends and the tail ends of two sets of steel coils are positioned in a staggered and overlapped mode through the clamp assembly, then the driving assembly is used for conducting movement and posture adjustment on the welding execution assembly, the welding execution assembly is firstly pushed to conduct pre-cutting along the overlapped positions of the head ends and the tail ends, and a to-be-welded inclined face with a flat notch is formed; and then the posture of the welding execution assembly is pushed to rotate and adjust, the two sets of to-be-welded slopes are attached and aligned, gaps of the attached and aligned slopes are synchronously welded and sewn, and the conditions of insufficient welding, welding skips and the like generated in the welding and sewing process are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of galvanized sheet production technology, specifically to a steel strip welding and stitching device for continuous production of galvanized sheets based on plasma arc. Background Technology

[0002] Galvanized steel sheets significantly improve the corrosion resistance of steel through surface galvanizing, and are used in various fields such as construction, home appliances, automobiles, and public facilities. The production process of galvanized steel sheets mainly includes cleaning, pickling, galvanizing, annealing, and passivation. In order to improve production efficiency, a continuous production process is usually adopted in the production process of galvanized steel sheets, where steel coils are connected end to end for continuous manufacturing. Therefore, during the continuous conveying of steel coils, when the current steel coil is about to be conveyed, welding equipment is used to weld it end to end with the next steel coil to achieve the continuous production characteristics of steel coils.

[0003] For example, Chinese patent CN116967647A discloses a steel strip welding machine. When welding two sets of steel strips, this type of device uses two sets of conveying rollers to rotate simultaneously, driving the steel strips to move towards the center of the welding seat. Since the two sets of rotating shafts rotate simultaneously, the two sets of steel strips of different materials will move towards the center of the welding seat at the same time, avoiding the steel strips from becoming skewed during the movement. This allows the ends of the two sets of steel strips to be aligned when they come into contact, improving the welding effect of the welding assembly on the two sets of steel strips.

[0004] However, when welding the two sets of steel strips at both ends, the ends of the steel strips are prone to stress warping and folding due to external impacts and winding. The ends of the two sets of steel strips are also prone to slant. When the ends of the two sets of steel strips are directly joined, gaps, warping, and incomplete alignment are likely to occur. This results in incomplete welding and missing welds at the ends, and the weld stability is poor. The strips are also prone to breakage under tension during continuous production and conveying. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc, which solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc, comprising: a welding table; two sets of clamping assemblies located on opposite sides of the welding table for clamping the beginning and end ends of two rolls of steel strips respectively, and causing the beginning and end ends to overlap to form a lap joint on the welding table; further comprising: a welding execution assembly; wherein the welding execution assembly comprises: a plasma arc cutting head located above the lap joint for reciprocating cutting along the trajectory of the lap joint, forming a flat, beveled surface to be welded; a flat pressure roller located above the lap joint, rotating and pressing down onto the beveled surface after it is formed, and rolling in the opposite direction along the cutting trajectory to apply overlapping pressure to the beveled surface, causing the two sets of beveled surfaces to fit together and align; and a plasma arc welding head located on one side of the flat pressure roller for welding and stitching the two sets of beveled surfaces after they have fit together and aligned.

[0007] Furthermore, the welding execution component also includes a purge nozzle located on one side of the plasma arc cutting head. During the movement, the purge nozzle performs a reciprocating oscillating motion in the same direction as the plasma arc cutting head to purge the cutting debris from the cutting slope in an oscillating manner.

[0008] Furthermore, the welding execution component also includes a flat grinding wheel located on one side of the plasma arc welding head. The flat grinding wheel rolls along the weld bead trajectory to apply pressure and grind the weld scars of the weld bead smooth.

[0009] Furthermore, it also includes a drive assembly located on one side of the welding execution assembly, used to drive the displacement and attitude adjustment of the welding execution assembly. The drive assembly includes: a lead screw guide rail located on one side of the welding execution assembly; and a deflection shaft located on the slide of the lead screw guide rail. One end of the deflection shaft is provided with a rotating disk supporting the welding execution assembly, used to drive the welding execution assembly to move along the trajectory of the lap joint.

[0010] Furthermore, the drive assembly also includes: a first limiting block, which is located at the other end of the deflection shaft; and a limiting frame, which is located on one side of the drive track of the lead screw guide, so that the first limiting block slides along the track of the limiting frame, providing attitude adjustment limits during the movement of the welding execution assembly.

[0011] Furthermore, the drive assembly further includes: a steering opening located on both sides of the travel track of the limiting frame, forming a break structure in the limiting frame to provide the space required for attitude adjustment during the movement of the welding execution assembly; a first deflection gear located in the middle of the first limiting block and smaller than the first limiting block, enabling the first deflection gear to slide along the travel track of the limiting frame and drive the welding execution assembly to perform attitude adjustment when sliding to the steering opening; and an electric push rod located at the opening of the steering opening, with a support frame at the telescopic end of the electric push rod, a first limiting guide plate at the upper end of the support frame that is flush with the track of the limiting frame to provide continuous limiting for attitude adjustment during the movement of the welding execution assembly, and a first deflection rack at the lower end of the support frame that can mesh with the first deflection gear to provide the drive required for attitude adjustment of the welding execution assembly.

[0012] Furthermore, it also includes: a drive rack, which is located on one side of the travel path of the rotating disk; a first support, which is located on the edge of the rotating disk, with one end of the first support having a reciprocating slide for the plasma arc cutting head to slide back and forth, and the other end of the first support having a yaw wheel for the cleaning nozzle to yaw back and forth; a first drive shaft, which is located in the middle of the first support, with one end of the first drive shaft having a first drive gear that meshes with the drive rack, so that when the plasma arc cutting head moves and cuts along the overlapping part, it generates a rotational force to drive the first drive shaft; a crank, which is located at the other end of the first drive shaft, with one end of the crank having a second arm connected to the yaw wheel, and the other end of the crank having a first arm connected to the reciprocating slide, so that the yaw wheel rotates under the rotational force of the first drive shaft, causing the second arm to swing in the opposite direction to the first arm, driving the plasma arc cutting head and the cleaning nozzle to reciprocate and yaw in the same direction.

[0013] Furthermore, it also includes: a second support handle, which is offset from the first support handle and located on the edge of the rotating disk, and sequentially supports the flat pressure wheel, the plasma arc welding head, and the flat grinding wheel along the travel trajectory of the inclined surface to be welded; a second drive shaft, which is located on one side of the flat pressure wheel, and one end of the second drive shaft is provided with a second drive gear that meshes with the drive rack, so that when the plasma arc welding head moves along the inclined surface to be welded for welding, it generates a rotational force driving the flat pressure wheel; and a third drive shaft, which is located on one side of the flat grinding wheel, and one end of the third drive shaft is provided with a third drive gear that meshes with the drive rack, so that when the plasma arc welding head moves along the inclined surface to be welded for welding, it generates a rotational force driving the flat grinding wheel.

[0014] Furthermore, the plasma arc cutting head is set in an inclined state relative to the overlapping part, so that the overlapping part forms a flat weldable bevel, so that when the flat pressure roller rolls and applies pressure, the upper bevel can be moved down along the lower bevel, so that the two sets of weldable bevels are aligned and fitted together.

[0015] Furthermore, the plasma arc welding head and the plasma arc cutting head have the same tilt angle and are aligned with the weld seams of the two sets of beveled surfaces to be welded after being attached.

[0016] The present invention has the following beneficial effects: (1) The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc uses a clamp assembly to position the first and last ends of two sets of steel coils in an overlapping manner. Then, the drive assembly moves and adjusts the posture of the welding execution assembly. First, the plasma arc cutting head of the welding execution assembly is pushed to pre-cut along the overlapping part of the first and last ends. On the one hand, the deformed part is cut off and removed, and on the other hand, a flat bevel to be welded is formed. Then, the posture of the welding execution assembly is rotated and adjusted so that the flat pressure roller and the plasma arc welding head are aligned with the bevel to be welded. The flat pressure roller is used to align the two sets of bevels to be welded, and the plasma arc welding head is used to weld the gap of the aligned bevels simultaneously. This effectively reduces the occurrence of false welds and missing welds during the welding and stitching process, resulting in higher welding and stitching quality at the first and last ends of the steel coil and better continuous production and conveying stability.

[0017] (2) The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc adjusts the posture of the welding execution component through the drive component, so that it has the characteristics of integrated cutting and welding of steel strip. It can flexibly switch between cutting and welding processes, providing a stable welding and stitching environment for connecting the beginning and end of two sets of steel strips. Furthermore, when adjusting the posture of the welding execution component, the setting of the first deflection drive structure enables the cutting and welding state to have the characteristics of manual adjustment and switching, and the cutting and welding work of steel strip can be carried out according to the needs. The setting of the second deflection drive structure enables the cutting and welding state to have the characteristics of self-switching and adjustment, and has flexible autonomy.

[0018] (3) The plasma arc-based continuous production steel strip welding and stitching device for galvanized steel strips uses the reciprocating synchronous movement of the plasma arc cutting head to move and cut the overlapping parts of the steel strip. This allows the plasma arc cutting head to move while also having the characteristics of reciprocating motion, and to reciprocate the cutting of the overlapping parts of the steel strip to ensure thorough cutting. At the same time as cutting, the cleaning nozzle is used to synchronously blow away the debris generated during cutting, avoiding debris residue in the weld and forming a clean cut bevel for welding, making the alignment of the beginning and end of the steel strip more accurate.

[0019] (4) The plasma arc-based steel strip welding and stitching device for continuous production of galvanized steel strip uses a flat pressure roller to apply rolling pressure to two sets of inclined surfaces to be welded when moving and welding the overlapping parts of the steel strip. This causes the two sets of inclined surfaces to fit together and align under pressure, forming a flat weld. Then, the synchronous welding of the plasma arc welding head and the synchronous grinding of the flat grinding wheel are used to form a flat, smooth, and stable welded seam at the beginning and end of the steel strip, providing a stable conveying state for its continuous production.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a left view of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the cutting of the steel strip in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the welding joint of the steel strip in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the fixture assembly in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the first drive mechanism of the clamp assembly in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the second drive mechanism of the clamp assembly in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the third drive of the clamp assembly in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the fourth drive of the clamp assembly in Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the fifth drive of the clamp assembly in Embodiment 1 of the present invention; Figure 11 This is a first assembly diagram of the driving component and the welding execution component in Embodiment 1 of the present invention; Figure 12 This is a second assembly diagram of the driving component and the welding execution component in Embodiment 1 of the present invention; Figure 13 This is an assembly diagram of the cutting structure on the welding execution component in Embodiment 1 of the present invention; Figure 14 This is a schematic diagram of the drive mechanism for the cutting structure on the welding execution component in Embodiment 1 of the present invention; Figure 15 This is a driving plan view of the cutting structure on the welding execution component in Embodiment 1 of the present invention; Figure 16This is a schematic diagram of the assembly of the welding structure on the welding execution component in Embodiment 1 of the present invention; Figure 17 This is a schematic diagram of the drive mechanism for the welding structure on the welding execution component in Embodiment 1 of the present invention; Figure 18 This is a schematic diagram of the first structure of the driving component in Embodiment 1 of the present invention; Figure 19 This is a schematic diagram of the second structure of the driving component in Embodiment 1 of the present invention; Figure 20 This is a schematic diagram showing the limiting position of the first deflection drive structure in Embodiment 1 of the present invention; Figure 21 This is a schematic diagram of the first deflection drive structure in Embodiment 1 of the present invention; Figure 22 This is a schematic diagram of the cutting state in Embodiment 1 of the present invention; Figure 23 This is a schematic diagram of the welding state in Embodiment 1 of the present invention; Figure 24 This is an assembly diagram of the second deflection drive structure in Embodiment 2 of the present invention; Figure 25 This is a schematic diagram of the second deflection drive structure in Embodiment 2 of the present invention; Figure 26 This is a schematic diagram of the second deflection drive structure in Embodiment 2 of the present invention; Figure 27 This is a schematic diagram of the limiting position of the second deflection drive structure in Embodiment 2 of the present invention.

[0022] In the diagram, 1. Welding table; 2. Support platform; 3. Housing; 4. Fixed pressure plate; 5. Movable pressure plate; 6. Drive rack; 7. Lead screw guide rail; 8. Limiting frame; 9. First deflection drive structure; 91. Electric push rod; 92. Support frame; 93. First limiting guide plate; 94. First deflection rack; 10. Rotary disk; 11. First support handle; 12. Plasma arc cutting head; 13. Cleaning nozzle; 14. Second support handle; 15. Flat pressure roller; 16. Plasma arc welding. 17. Head; 18. Grinding wheel; 19. Turning opening; 20. First limiting block; 21. Motor; 22. Second drive shaft; 23. Drive belt; 24. First drive shaft; 25. First bevel gear; 26. Second bevel gear; 27. Third bevel gear; 28. Fourth bevel gear; 29. ​​Sliding shaft; 30. Electromagnetic suction ring; 31. Iron ring; 32. Spring sleeve; 32. Limiting guide plate; 33. Laser rangefinder sensor; 34. First lead screw; 35. First slide table; 36. Second lead screw; 37. Second slide; 38. First transmission gear; 39. Second transmission gear; 40. Third transmission gear; 41. Deflection shaft; 42. First deflection gear; 43. First drive shaft; 44. Reciprocating slide; 45. Swivel wheel; 46. Crank; 47. First support arm; 48. Second support arm; 49. Second drive shaft; 50. Second drive gear; 51. Third drive shaft; 52. Third drive gear; 53. 54. Driven gear; 55. Second driven gear; 56. Third driven gear; 57. Fourth driven gear; 58. Second limiting block; 59. Second deflection gear; 50. Second deflection drive structure; 51. Housing; 592. Reset slide; 593. Spring guide rod; 594. Top support plate; 595. Pressure plate; 596. First inclined plane; 597. Second inclined plane; 598. Second deflection rack; 599. Extended limiting guide plate; 5910. Second limiting guide plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0025] like Figures 1-27 As shown, this embodiment of the invention provides a steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc.

[0026] Example 1 like Figures 1-3 , Figures 5-10 As shown, the steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc includes a welding table 1 and clamping assemblies located on both sides of the welding table 1. The two sets of clamping assemblies are used to clamp the beginning and end ends of two rolls of steel strips respectively, and to make the beginning and end ends overlap to form an overlap on the welding table 1 (e.g., Figure 3 (as shown), where; The clamping assembly includes support platforms 2 located on both sides of the welding table 1. A fixed pressure plate 4 is positioned above the support platform 2, and a movable pressure plate 5, which moves vertically relative to the fixed pressure plate 4, is positioned above the fixed pressure plate 4. The steel strip is clamped and fixed by the opposing pressure of the movable pressure plate 5 and the fixed pressure plate 4. Limiting guide plates 32 are symmetrically arranged in pairs on the platform surface of the fixed pressure plate 4. The opposing movement of the limiting guide plates 32 provides traction and guidance for the steel strip before clamping and fixing. Furthermore, the movable pressure plate 5 and the limiting guide plates 32 move synchronously through an adjustment structure to traction and guide the steel strip before clamping and fixing, resulting in more precise alignment of the steel strip's ends. Specifically: The adjustment structure includes second lead screws 35 located on both sides of the movable pressure plate 5. The second lead screws 35 are vertically mounted on the housing 3 on the fixed pressure plate 4. The housing 3 has a first transmission shaft 23 inside, and a gear pair of a third bevel gear 26 and a fourth bevel gear 27 along its axial direction. The fourth bevel gear 27 and the second lead screw 35 are driven by a gear combination of a first transmission gear 37, a second transmission gear 38, and a third transmission gear 39. The motor 20 located at one end of the first transmission shaft 23 drives the first transmission shaft 23 to rotate, which in turn drives the combination of the third bevel gear 26 and the fourth bevel gear 27 to rotate. The driving force is transmitted to the second lead screw 35 through the meshing combination of the first transmission gear 37, the second transmission gear 38, and the third transmission gear 39, converting the knob force into a lifting driving force, which pushes the movable pressure plate 5 on the second slide 36 to move up and down, driving the movable pressure plate 5 to move down relative to the fixed pressure plate 4, clamping and fixing the steel strip between the fixed pressure plate 4 and the movable pressure plate 5.

[0027] Furthermore, the adjustment structure also includes a first lead screw 33 located inside the support platform 2 and a second transmission shaft 21 located on one side of the housing 3. A transmission belt 22 is provided between the second transmission shaft 21 and the first lead screw 33. The threads of the first lead screw 33 are arranged in opposite directions with the center line as the boundary, and a first slide 34 with a top support limiting guide plate 32 is provided along its axial direction. At the same time, the first transmission shaft 23 is provided with a second bevel gear 25 and a first bevel gear 24 gear pair that drives the second transmission shaft 21 along its axial direction. By rotating the first transmission shaft 23, the combination of the second bevel gear 25 and the first bevel gear 24 is driven to rotate, and then the driving force is transmitted to the first lead screw 33 through the combination of the second transmission shaft 21 and the transmission belt 22, converting the knob force into a counter-thrust force, pushing the limiting guide plate 32 to move in opposite directions. After it comes into contact with both sides of the steel belt, it pulls and guides the steel belt.

[0028] It should be noted that the second bevel gear 25 and the first bevel gear 24, and the third bevel gear 26 and the fourth bevel gear 27 are all differential gear structures. This allows the second bevel gear 25 to drive the first bevel gear 24 at a faster speed and the third bevel gear 26 to drive the fourth bevel gear 27 at a slower speed when the first drive shaft 23 is used as the drive source. This results in a fast and slow drive between the first lead screw 33 and the second lead screw 35, which makes the limiting guide plate 32 move faster in opposite directions and guide the steel belt first. The movable pressure plate 5 moves up and down at a slower speed. After guiding the steel belt, it clamps with the fixed pressure plate 4 to hold and fix the steel belt.

[0029] In addition, the surfaces of the movable pressure plate 5 and the fixed pressure plate 4 are provided with clearance slots to allow the limiting guide plate 32 to move, so that while the limiting guide plate 32 moves in opposite directions, the movable pressure plate 5 can continuously move relative to the fixed pressure plate 4.

[0030] In addition to the above, a sliding shaft 28 is provided axially along the first transmission shaft 23, and a spring sleeve 31 is provided at one end of the sliding shaft 28, so that the spring sleeve 31 is elastically connected to the second bevel gear 25, driving the second bevel gear 25 to slide elastically along the sliding shaft 28. Furthermore, an iron ring 30 is provided on one side of the second bevel gear 25, and an electromagnetic suction ring 29 is provided on the other side of the iron ring 30. By utilizing the electromagnetic attraction of the electromagnetic suction ring 29, a magnetic attraction force is generated on the iron ring 30, driving the second bevel gear 25 to slide axially along the sliding shaft 28 and mesh with the first bevel gear 24. The combination generates a driving force that drives the limiting guide plate 32 to move in opposite directions. A laser rangefinder 321 is installed on the limiting guide plate 32 to sense and monitor the distance between the limiting guide plate 32 and the steel strip. After detecting that the limiting guide plate 32 is in contact with the steel strip, the electromagnetic suction ring 29 is de-energized, the magnetic attraction is broken, and the second bevel gear 25 and the first bevel gear 24 are unlocked, releasing the opposing driving force on the limiting guide plate 32. This causes the limiting guide plate 32 to stop moving after it is in contact with the steel strip, while the lifting and lowering movement of the movable pressure plate 5 is not affected and can continue to move.

[0031] like Figures 3-4 , Figures 11-12 , Figures 18-23 As shown, to achieve integrated cutting and welding of the overlapping section of two steel strips, a welding execution assembly is provided above the overlapping section. This assembly includes a plasma arc cutting head 12 positioned above the overlapping section, used for reciprocating cutting along the trajectory of the overlapping seam to create a smooth, beveled surface for welding. It also includes a cleaning nozzle 13 located on one side of the plasma arc cutting head 12. During its movement, the cleaning nozzle 13 performs a reciprocating oscillating motion in the same direction as the plasma arc cutting head 12, oscillatingly blowing away cutting debris from the beveled surface, thus creating a smooth, beveled structure at the overlapping section of the two steel strips (e.g., ...). Figure 3 (As shown), to improve the tightness of the weld connection during subsequent welding.

[0032] In addition, the welding execution assembly includes a flat pressure roller 15 located above the overlap portion. After the inclined surface to be welded is formed, it rotates and presses down onto the inclined surface and rolls in the opposite direction along the cutting trajectory to apply overlapping pressure to the inclined surface to be welded, so that the two sets of inclined surfaces to be welded fit together and align. A plasma arc welding head 16 is located on one side of the flat pressure roller 15 for welding the two sets of inclined surfaces to be welded after they are fitted together and aligned. A flat grinding wheel 17 is located on one side of the plasma arc welding head 16. The flat grinding wheel 17 rolls and applies pressure along the weld bead trajectory to grind the weld scars smooth. After the inclined surface to be welded is cut and formed, the posture of the welding execution assembly is adjusted so that the combination of the flat pressure roller 15, plasma arc welding head 16, and flat grinding wheel 17 rotates and swings above the inclined surface to be welded. After the two sets of inclined surfaces to be welded are flattened and aligned to form a weld, the weld is simultaneously welded and ground smooth (e.g., Figure 4 As shown in the figure, this makes the welding seam between the two sets of steel strips tighter, forming a flat, smooth, and stable welded seam strip, providing a stable conveying state for its continuous production.

[0033] Furthermore, a drive component is provided on one side of the welding execution component to drive the displacement and posture adjustment of the welding execution component. When the welding execution component moves along the overlap, it performs cutting work, removing the raised edges, folds, and bevels at the beginning and end of the two sets of steel strips to form a uniform welding bevel with a flat cut. After the cutting is completed, the cutting waste is removed. Then, the posture of the welding execution component is rotated and adjusted so that the welding execution component moves in the opposite direction along the cutting bevel to weld the cutting bevel and form a tightly connected welding seam.

[0034] It should be noted that the plasma arc cutting head 12 is set in an inclined state relative to the overlapping part, so that the overlapping part forms a flat bevel for welding. When the subsequent flat pressure roller 15 rolls in the opposite direction to apply pressure, due to the good bending performance of the steel strip, while applying pressure to the upper bevel, the upper bevel can slide and overlap relative to the lower bevel, so that the two sets of bevels to be welded fit together and form a tightly connected weld. Furthermore, the plasma arc welding head 16 is set at the same tilt angle as the plasma arc cutting head 12 and aligned with the weld of the two sets of bevels to be welded after fitting together, so that the plasma arc welding head 16 performs welding work along the bevel angle of the weld, improving the tightness of the weld joint.

[0035] As a further embodiment of this invention, the drive assembly includes a lead screw guide 7 located on one side of the welding execution assembly, and a deflection shaft 40 is provided on the slide of the lead screw guide 7. One end of the deflection shaft 40 is provided with a rotating disk 10 that supports the welding execution assembly. The lead screw of the lead screw guide 7 is used to drive the welding execution assembly to move, so that the welding execution assembly moves forward and backward along the overlap of the two sets of steel strips to perform cutting and welding of the overlap.

[0036] Furthermore, a first limiting block 19 is provided at the other end of the deflection shaft 40, and a limiting frame 8 is provided on one side of the drive track of the lead screw guide rail 7. The first limiting block 19 slides along the track of the limiting frame 8. By using the sliding limitation of the first limiting block 19 on the limiting frame 8, when the lead screw guide rail 7 drives the welding execution component to move, a rotational limitation is applied to the combination of the deflection shaft 40 and the rotary disk 10, thereby limiting the posture adjustment of the welding execution component and keeping it with a single movement characteristic.

[0037] Furthermore, the drive assembly also includes steering openings 18 located on both sides of the travel track of the limiting frame 8. The steering openings 18 create a break structure in the limiting frame 8, providing the space required for attitude adjustment during the movement of the welding execution assembly. At the opening of the steering openings 18, a first deflection drive structure 9 is provided, consisting of an electric push rod 91, a support frame 92, a first limiting guide plate 93, and a first deflection rack 94. The first deflection drive structure 9 limits the sliding movement of the first limiting block 19 and engages with the first deflection gear 41 in the middle of the first limiting block 19. This allows for rotational adjustment of the welding execution assembly's attitude after the cutting or welding process is completed (e.g., when the welding execution assembly is performing a cutting motion, it moves along the overlap of the two sets of steel strips). The overlapping portion is cut. After cutting, when it moves to the turning opening 18, the first deflection rack 94 is controlled to mesh with the first deflection gear 41 to generate rotational thrust, adjusting it to a welding posture. After the welding posture adjustment is completed, when it moves in the opposite direction to the turning opening 18, the first limiting guide plate 93 is controlled to abut with the first limiting block 19 to apply limiting guidance, maintaining its single movement after the welding posture adjustment. This allows the first limiting block 19 to transition into the limiting frame 8 for continuous sliding limitation, thereby causing the welding execution component to move in the opposite direction to perform the welding work. After the welding is completed, the welding execution component is rotated from the welding posture to the cutting posture in the same way (preparing for the first and last welding of the next set of steel strips). Specifically: An electric push rod 91 is located at the opening of the turning opening 18. The telescopic end of the electric push rod 91 is equipped with a support frame 92. The upper end of the support frame 92 is equipped with a first limiting guide plate 93 that is flush with the track of the limiting frame 8. The lower end of the support frame 92 is equipped with a first deflection rack 94 that can mesh with the first deflection gear 41. When the first limiting block 19 slides to the turning opening 18, the electric push rod 91 can be controlled to retract and move, causing the support frame 92 to move upward, thus moving the first deflection rack 94 upward. This allows it to mesh with the first deflection gear 41, generating a rotational driving force to adjust the posture of the welding actuator, and causing the first limiting guide plate 93 to move upward synchronously, thus facilitating the movement of the first limiting block 19. Synchronous rotation provides clearance, and the electric push rod 91 can be controlled to extend and move, driving the support frame 92 to move downward, so that the first limiting guide plate 93 moves downward and can fit and limit the first limiting block 19, providing posture limit when the welding execution component moves to the turning opening 18, and causing the first deflection rack 94 to move downward, providing clearance for the synchronous movement of the first deflection gear 41 (the first limiting block 19 is preferably set as an even-numbered polygonal structure such as a square, and when the first deflection gear 41 meshes and rotates along the first deflection rack 94, its rotation angle each time is the same as the edge angle of the first limiting block 19, so that the first limiting block 19 after rotation can still slide into the limiting frame 8).

[0038] like Figures 13-15 , Figure 22 As shown, to achieve self-movement of the plasma arc cutting head 12 and cleaning nozzle 13 during their movement, a first support 11 is provided on the edge of the rotating disk 10. One end of the first support 11 is provided with a reciprocating slide 44 for the plasma arc cutting head 12 to slide back and forth, and the other end of the first support 11 is provided with a swaying wheel 45 for the cleaning nozzle 13 to sway back and forth. This allows the reciprocating slide 44 to slide back and forth along the first support 11 as the plasma arc cutting head 12 and cleaning nozzle 13 move along the overlap, pushing the plasma arc cutting head 12 to move back and forth, repeatedly cutting the two sets of steel strip overlaps to ensure complete cutting. The swaying wheel 45 also oscillates back and forth, pushing the cleaning nozzle 13 to sway back and forth, blowing away and cleaning residual debris generated during cutting. Specifically: A drive rack 6 is provided on one side of the travel trajectory of the rotating disk 10, and a first drive shaft 42 is provided in the middle of the first support 11. One end of the first drive shaft 42 is provided with a first drive gear 43 that meshes with the drive rack 6, and the other end of the first drive shaft 42 is provided with a crank 46. One end of the crank 46 is provided with a second support arm 48 connected to the yaw wheel 45, and the other end of the crank 46 is provided with a first support arm 47 connected to the reciprocating slide table 44. When the plasma arc cutting head 12 and the cleaning nozzle 13 move along the overlapping part to cut and blow, the first drive gear 43 is driven to mesh with the drive rack 6, converting the linear thrust into rotational thrust, generating the rotational force that drives the first drive shaft 42. During rotation, the crank 46 is driven to rotate, and the crank 46 drives the second arm 48 to swing in the opposite direction to the first arm 47. While the first arm 47 swings back and forth, it drives the reciprocating slide 44 to move back and forth, so that the plasma arc cutting head 12 moves back and forth to cut. While the second arm 48 swings back and forth, it drives the yaw wheel 45 to swing back and forth, so that the cleaning nozzle 13 swings back and forth, dynamically blowing away residual debris on the cutting path. Furthermore, by utilizing the characteristic that the second arm 48 swings in the opposite direction to the first arm 47, the plasma arc cutting head 12 and the cleaning nozzle 13 produce reciprocating and yaw movements in the same direction, avoiding the two moving in opposite directions and causing a blow-to-blow situation.

[0039] like Figures 16-17 , Figure 23As shown, to achieve self-rotation of the pressure roller 15 and the grinding roller 17 during movement, a second support 14 is provided on the edge of the rotating disk 10, offset from the first support 11. This second support 14 sequentially supports the pressure roller 15, the plasma arc welding head 16, and the grinding roller 17 along the travel trajectory of the inclined plane to be welded. A second drive shaft 49 is provided on one side of the pressure roller 15, with a second drive gear 50 meshing with the drive rack 6 at one end. A third drive shaft 51 is provided on one side of the grinding roller 17, with a third drive gear 52 meshing with the drive rack 6 at one end. When the combination of the pressure roller 15, the plasma arc welding head 16, and the grinding roller 17 moves along the weld seam, the second drive... The meshing of the driven gear 50 with the drive rack 6 drives the second drive shaft 49 to rotate. Through the meshing combination of the first driven gear 53 and the second driven gear 54 between the second drive shaft 49 and the flat pressure wheel 15, the flat pressure wheel 15 moves and rotates simultaneously, applying rolling pressure to the two sets of inclined surfaces to be welded, so that the two sets of inclined surfaces to be welded fit together and align, forming the inclined seam to be welded. At the same time, the meshing of the third drive gear 52 with the drive rack 6 drives the third drive shaft 51 to rotate. Through the meshing combination of the third driven gear 55 and the fourth driven gear 56 between the third drive shaft 51 and the flat grinding wheel 17, the flat grinding wheel 17 moves and rotates simultaneously, applying grinding force to the weld seam and grinding the weld seam smooth.

[0040] Example 2 like Figures 24-27 As shown, this embodiment differs from Embodiment 1 in that a second limiting block 57 is provided at one end of the deflection shaft 40, and a second deflection gear 58 is provided on one side of the second limiting block 57. When the second limiting block 57 and the second deflection gear 58 move to the turning opening 18, they generate a driving force with the second deflection drive structure 59 provided at the turning opening 18 to drive the welding execution component to adjust or limit its posture. The second deflection drive structure 59 includes a pressure plate 595, and one end of the pressure plate 595 is provided with a force that can interact with the second limiting block 57. The first inclined surface 596, which moves relative to the second limiting block 57, is pushed by the second limiting block 57, causing the second deflection rack 598 to move and mesh with the second deflection gear 58, generating a rotational driving force to drive the welding execution component. At the other end of the pressure plate 595, there is a second inclined surface 597 that can move relative to the second limiting block 57, causing the second inclined surface 597 to be pushed by the second limiting block 57, pushing the second limiting guide plate 5910 to move and fit against the second limiting block 57, generating a limiting force during the movement of the welding execution component.

[0041] In addition, the second deflection drive structure 59 also includes a housing 591 located below the pressure plate 595. A spring guide rod 593 is provided inside the housing 591, and a reset slide 592 is slidably provided in the middle of the spring guide rod 593. A top support plate 594 is fixedly connected above the reset slide 592. The top support plate 594 supports the pressure plate 595, the second deflection rack 598, and the second limiting guide plate 5910, so that when the pressure plate 595 is pushed by the second limiting block 57, it can drive the second deflection rack 598 or the second limiting guide plate 5910 to move (e.g., after the welding execution component finishes cutting, its cutting posture moves to the turning opening 18, utilizing the second deflection rack 598 and the second limiting guide plate 5910). The meshing of the rotating gear 58 allows it to rotate to a welding posture. When the welding posture moves in the reverse direction for welding, and then moves back to the turning opening 18, the welding posture is maintained by the contact and limiting of the second limiting guide plate 5910 and the second limiting block 57, allowing it to transition into the limiting frame 8 for continuous limiting. After the movement, it can be reset. Furthermore, an extended limiting guide plate 599 is provided at one end of the second deflection rack 598, so that the second limiting block 57 slides onto the extended limiting guide plate 599 immediately after being subjected to rotational thrust for limiting. This allows the welding execution component to have self-adjusting and limiting capabilities when it moves to the turning opening 18.

[0042] It should be noted that the contact edges of the second limiting block 57 with the first inclined surface 596 and the second inclined surface 597 are all chamfered, so that when the second limiting block 57 contacts the first inclined surface 596 and the second inclined surface 597 respectively, the edges and corners of the inclined surfaces can be staggered to avoid direct contact with the inclined surfaces, thus preventing the edges and corners of the inclined surfaces from hindering the continuous movement of the second limiting block 57 during contact.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc, characterized in that, include: Welding station (1); The clamping assembly is provided in two sets and is located on both sides of the welding table (1) respectively. It is used to clamp the first and last ends of the two rolls of steel strips respectively and to make the first and last ends overlap to form an overlap on the welding table (1). Also includes: welding execution components; The welding execution component includes: The plasma arc cutting head (12) is located above the lap joint and is used to perform reciprocating cutting along the trajectory of the lap joint so that the lap joint forms a flat weldable bevel. The flat pressure roller (15) is located above the overlap. After the inclined surface to be welded is formed, it rotates and presses down onto the inclined surface to be welded, and rolls in the opposite direction along the cutting trajectory to apply pressure, so that the two sets of inclined surfaces to be welded fit together and are aligned. The plasma arc welding head (16) is located on one side of the flat pressure roller (15) and is used to weld the two sets of beveled surfaces after they are aligned.

2. The steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc according to claim 1, characterized in that: The welding execution assembly also includes a purge nozzle (13) located on one side of the plasma arc cutting head (12). During the movement, the purge nozzle (13) performs a reciprocating oscillating motion in the same direction as the plasma arc cutting head (12) to purge the cutting debris on the cutting slope in an oscillating manner.

3. The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc according to claim 2, characterized in that: The welding execution component also includes a flat grinding wheel (17) located on one side of the plasma arc welding head (16). The flat grinding wheel (17) rolls along the weld track to apply pressure and grind the weld scars of the weld bead smooth.

4. The steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc according to claims 2-3, characterized in that: It also includes a drive assembly disposed on one side of the welding execution assembly, used to drive the displacement and attitude adjustment of the welding execution assembly, wherein the drive assembly includes: Screw guide rail (7), the screw guide rail (7) is located on one side of the welding execution assembly; A deflection shaft (40) is provided on the slide of the lead screw guide (7). One end of the deflection shaft (40) is provided with a rotating disk (10) that supports the welding execution component, which is used to drive the welding execution component to move along the trajectory of the lap joint.

5. The steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc according to claim 4, characterized in that, The driving component also includes: The first limiting block (19) is located at the other end of the deflection shaft (40); The limiting frame (8) is located on one side of the drive track of the lead screw guide (7), so that the first limiting block (19) slides along the track of the limiting frame (8) to provide posture adjustment limit during the movement of the welding execution component.

6. The steel strip welding and stitching device for continuous production of galvanized steel sheets based on plasma arc according to claim 4, characterized in that, The driving component also includes: A steering opening (18) is located on both sides of the travel track of the limiting frame (8), so that the limiting frame (8) forms a break structure, providing the space required for attitude adjustment during the movement of the welding execution component; The first deflection gear (41) is located in the middle of the first limiting block (19) and is smaller than the first limiting block (19), so that the first deflection gear (41) has the ability to slide along the travel track of the limiting frame (8), and when it slides to the turning opening (18), it drives the welding execution component to perform posture adjustment. An electric push rod (91) is located at the opening of the turning opening (18). The telescopic end of the electric push rod (91) is provided with a support frame (92). The upper end of the support frame (92) is provided with a first limiting guide plate (93) that can be flush with the track of the limiting frame (8) to provide continuous limiting of the posture adjustment during the movement of the welding execution component. The lower end of the support frame (92) is provided with a first deflection rack (94) that can mesh with the first deflection gear (41) to provide the drive required for the posture adjustment of the welding execution component.

7. The steel strip welding and stitching device for continuous production of galvanized steel sheet based on plasma arc according to claim 4, characterized in that, Also includes: A drive rack (6) is provided on one side of the travel trajectory of the rotating disk (10); The first handle (11) is located on the edge of the rotating disk (10). One end of the first handle (11) is provided with a reciprocating slide (44) for the plasma arc cutting head (12) to slide back and forth. The other end of the first handle (11) is provided with a yaw wheel (45) for the cleaning nozzle (13) to yaw back and forth. The first drive shaft (42) is located in the middle of the first support (11). One end of the first drive shaft (42) is provided with a first drive gear (43) that meshes with the drive rack (6). When the plasma arc cutting head (12) moves and cuts along the overlapping part, it generates a rotational force that drives the first drive shaft (42). The crank (46) is located at the other end of the first drive shaft (42). One end of the crank (46) arm is provided with a second arm (48) connected to the yaw wheel (45), and the other end of the crank (46) is provided with a first arm (47) connected to the reciprocating slide (44). The yaw wheel (45) is rotated by the rotation force of the first drive shaft (42), which drives the second arm (48) and the first arm (47) to swing in opposite directions, driving the plasma arc cutting head (12) and the cleaning nozzle (13) to reciprocate and swing in the same direction.

8. The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc according to claim 4, characterized in that: Also includes: The second support (14) is offset from the first support (11) and is located on the edge of the rotating disk (10), and supports the flat pressure wheel (15), plasma arc welding head (16) and flat grinding wheel (17) in sequence along the travel trajectory of the inclined surface to be welded. The second drive shaft (49) is located on one side of the flat pressure wheel (15). One end of the second drive shaft (49) is provided with a second drive gear (50) that meshes with the drive rack (6). When the plasma arc welding head (16) moves along the inclined plane to be welded, it generates the self-rotation force of the flat pressure wheel (15). The third drive shaft (51) is located on one side of the flat grinding wheel (17). One end of the third drive shaft (51) is provided with a third drive gear (52) that meshes with the drive rack (6). When the plasma arc welding head (16) moves along the inclined plane to be welded, it generates the self-rotation force of the drive flat grinding wheel (17).

9. The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc according to claim 8, characterized in that: The plasma arc cutting head (12) is set to an inclined state relative to the overlapping part, so that the overlapping part forms a flat weldable inclined surface. When the flat pressure roller (15) rolls and applies pressure, the upper inclined surface can be moved down along the lower inclined surface, so that the two sets of weldable inclined surfaces are aligned and fitted together.

10. The steel strip welding and stitching device for continuous production of galvanized sheet based on plasma arc according to claim 8, characterized in that: The plasma arc welding head (16) has the same tilt angle as the plasma arc cutting head (12) and is aligned with the weld seams of the two sets of beveled surfaces after they are attached.

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