A high-power laser welding equipment for thin plate welding processes

Abstract

This invention provides a high-power laser welding equipment for thin plate welding, belonging to the field of laser welding equipment technology. The invention includes an operating table and a fixed frame. A horizontal arm can slide along an adjustment unit and its position can be adjusted in a plane using the adjustment unit. A liftable laser welding head is provided at the end of the horizontal arm. The thin plate to be processed can be placed on the surface of a buffer unit on a flipping unit. The laser welding head is then used to weld the edge seams of the cylindrical metal plate. The flipping unit can be used to flip the entire metal cylinder so that it is unloaded along the buffer unit. This invention utilizes the reverse magnetic field repulsion generated by the sliding cutting of the magnetic field lines of the magnetic ring by the metal cylinder for primary non-contact buffering, and then uses the air damping formed by the compression of the spring by the telescopic rod and the slow exhaust through the exhaust hole for secondary contact buffering. This effectively slows down the falling speed of the metal cylinder and avoids the problems of scratches, dents, and deformation on the surface of the metal cylinder that are easily caused by traditional direct unloading methods.

Description

Technical Field

[0001] This invention relates to the field of laser welding equipment technology, and in particular to a high-power laser welding equipment for thin plate welding process. Background Technology

[0002] High-power laser welding, with its advantages of fast welding speed, high weld quality, and small heat-affected zone, has become the mainstream process for manufacturing thin metal tubes. After welding, the metal tube needs to be unloaded from the welding station to the collection area before subsequent processing steps can begin. Currently, there are two main methods for unloading welded thin metal tubes: manual unloading and automatic unloading. Manual unloading requires operators to manually remove the hot metal tube from the welding station and place it into the collection box after welding. This method is not only labor-intensive and inefficient, but the high temperature of the freshly welded metal tube also poses a significant safety hazard, as it can easily cause burns to operators.

[0003] Automatic feeding methods often employ a tilting feeding structure. By tilting the welding plate, the metal cylinder slides along the mandrel under gravity and falls directly into the collection area. Newly welded metal cylinders are relatively soft and require a high degree of surface finish. The impact of direct drop can cause dents and deformation, severely affecting the product's dimensional accuracy and roundness. During sliding and falling, the metal cylinder's surface undergoes rigid collisions and friction with the mandrel and the inner wall of the collection box, resulting in surface scratches, dents, and other defects, significantly reducing the product's appearance quality and yield. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-power laser welding equipment for thin plate welding processes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-power laser welding device, comprising an operating table and a fixed frame. An adjustment unit is installed at the upper end of the operating table, and a cross arm is installed at the upper end of the adjustment unit. The cross arm can slide along the adjustment unit and its position can be adjusted in a plane with the help of the adjustment unit. A liftable laser welding head is provided at the end of the cross arm. A flipping unit is provided at the upper end of the fixed frame. The thin plate to be processed can be placed on the surface of the buffer unit on the flipping unit and bent into a cylindrical structure by a deformation unit. Then, the edge gap of the cylindrical metal plate is welded with the laser welding head to form a complete metal cylinder. The complete metal cylinder can be fed along the buffer unit by flipping with the help of the flipping unit. The buffer unit can buffer the discharge of the metal cylinder by electromagnetic effect to avoid direct drop and damage.

[0006] Preferably, the adjustment unit includes a connecting plate, a slide rail is mounted on the upper end of the connecting plate, a sliding block is slidably connected to the surface of the slide rail, an assembly plate is fixedly connected to the upper end of the sliding block, a track is fixedly connected to the upper end of the assembly plate, the cross arm can slide on the track, can push the assembly plate to slide on the surface of the slide rail, and then slide the cross arm along the track to adjust the position of the laser welding head, wherein a control screen is fixedly mounted on the surface of the cross arm, and the power of the laser welding head can be adjusted by using the control screen.

[0007] Preferably, the upper end of the connecting plate is fixedly connected to an adjusting seat, and the bottom of the assembly plate is rotatably connected to a lead screw. The lead screw and the adjusting seat are threaded together. The position of the assembly plate can be adjusted by rotating the lead screw and sliding on the surface of the slide rail with the help of a sliding block. A clamping bolt is threaded into the sliding block and can be used to press against the slide rail to fix the position of the cross arm.

[0008] Preferably, a lifting unit is fixedly installed at the port of the cross arm, and the bottom end of the lifting unit is fixed to the laser welding head, so that the position of the laser welding head can be controlled in the vertical direction by using the lifting unit.

[0009] Preferably, the flipping unit includes a fixed base fixedly installed with the fixed frame. A welding plate is rotatably installed inside the fixed base. An electromagnet is fixedly connected to the upper end of the fixed base. The electromagnet generates a magnetic force to attract the welding plate and keep it horizontal. A lifting spring is fixedly connected between the welding plate and the fixed frame. When the power to the electromagnet is disconnected, the elastic force of the lifting spring can drive the welding plate to rotate and tilt on the fixed base to remove the metal sheet above.

[0010] Preferably, the buffer unit includes a mandrel, which is fixedly installed on the upper end of the welding plate. An annular groove is formed on the surface of the mandrel, and a magnetic ring is slidably fitted on the surface of the annular groove. A thin metal sheet to be welded, bent into a cylindrical shape, is fitted on the surface of the mandrel. When the welding plate is tilted for unloading, the welded metal cylinder can slide along the surface of the mandrel. During the sliding process, the metal cylinder cuts the magnetic field lines on the surface of the magnetic ring to generate a corresponding magnetic field that repels the magnetic field of the magnetic ring for buffering.

[0011] Preferably, the surface of the mandrel is provided with a groove, and a telescopic rod is fixedly installed inside the groove. One end of the telescopic rod is fixedly connected to a baffle, which can slide along the groove. A compression spring is fixedly connected inside the telescopic rod, and an exhaust hole is provided on the surface of the telescopic rod. When the welding plate is tilted for unloading, the magnetic ring will slide along the surface of the annular groove to squeeze the telescopic rod with the help of the baffle. When the telescopic rod retracts, it can squeeze the compression spring and simultaneously use the exhaust hole to discharge the air inside the telescopic rod to provide sliding damping for the magnetic ring.

[0012] Preferably, the deformation unit includes a fixed ring fixedly mounted on the upper end of the welding plate. The fixed ring is sleeved on the surface of the mandrel. The surface of the fixed ring has an annular groove. A rotating ring is rotatably connected inside the annular groove. A telescopic arm is fixedly mounted on the surface of the rotating ring. An extension spring is provided inside the telescopic arm. The telescopic arm faces the center of the rotating ring. A pressure wheel is rotatably mounted on the end of the telescopic arm. The pressure wheel can be driven by the elastic force of the extension spring to press it against the surface of the bent cylindrical metal sheet to be welded. The rotation of the rotating ring can cause the pressure wheel to roll on the surface of the bent cylindrical metal sheet to be welded to cooperate with the mandrel to press the metal sheet into a cylindrical structure.

[0013] Preferably, a drive motor is fixedly installed on the upper end of the welding plate, a roller is installed on the output shaft of the drive motor, a pressure ring is fixedly connected to the surface of the rotating ring, the roller is a rubber wheel, and the roller abuts against the surface of the pressure ring. When the drive motor drives the roller to rotate, the rotating ring can rotate inside the ring groove to crush the surface of the thin metal plate to be welded, which is bent into a cylindrical shape, with the help of the pressure wheel.

[0014] Preferably, a high-power laser welding equipment is used for thin plate welding processes, and the high-power laser welding equipment includes the following steps: S1. Turn on the main power supply of the equipment to energize the electromagnet and generate attraction to keep the welding plate in a horizontal state. Push the magnetic ring along the annular groove to the initial position close to the fixed ring. Preset the output power, welding speed and lifting height parameters of the laser welding head through the control panel. Test run the deformation unit, buffer unit and adjustment unit under no-load to confirm that each component is operating normally. S2. Place one end of the metal sheet cut to the specified size onto the surface of the mandrel, bend the sheet along the circumference of the mandrel to align the edges of both ends of the sheet and leave a uniform welding gap, and initially insert the sheet into the gap between the mandrel and the pressure roller. S3. Start the drive motor. The drive motor drives the pressure ring and the annular groove surrounding the fixed ring to rotate at a constant speed through the rubber roller. The extension spring inside the telescopic arm drives the clamping wheel to always press tightly against the surface of the thin plate. As the clamping wheel rolls with the rotating ring, it works with the mandrel to gradually roll the thin plate into a complete cylindrical structure, ensuring that there is no misalignment or gap at the edge to be welded. S4. Rotate the screw to adjust the assembly plate to slide along the slide rail, while the sliding cross arm moves along the rail. In conjunction with the lifting unit, adjust the vertical height of the laser welding head so that the focus of the laser welding head is precisely aligned with the starting point of the weld seam on the cylindrical thin plate. Tighten the clamping bolts to fix the position of the cross arm. S5. Start the laser welding head. The adjustment unit drives the laser welding head to move in a straight line at a constant speed along the gap to be welded, and continuously welds the longitudinal edge gap of the cylindrical thin plate. During the welding process, the welding power and weld formation status are monitored in real time through the control panel, and the welding parameters are finely adjusted in time. S6. After welding is completed, turn off the laser welding head and move the laser welding head to a safe position through the adjustment unit. Visually inspect the continuity, flatness and penetration of the weld to confirm that there are no welding defects such as missed welds, burn-through, weld beads, or undercut. S7. Disconnect the power supply to the electromagnet. The elastic force of the spring drives the welding plate to rotate and tilt around the fixed seat. The welded metal cylinder slides outward along the surface of the mandrel. During the sliding process, the metal cylinder cuts the magnetic field lines on the surface of the magnetic ring to generate a reverse repulsive force for the first stage of electromagnetic buffering. The sliding of the magnetic ring drives the baffle to squeeze the telescopic rod. The compression of the compressed spring and the slow exhaust of the exhaust hole provide the second stage of damping buffering, so that the metal cylinder falls slowly and steadily to the collection area. S8. After the material is unloaded, the electromagnet power supply is turned on again. The electromagnet attracts the welding plate and returns it to the horizontal working state. The pressure spring inside the telescopic rod pushes the baffle and magnetic ring back to the initial position along the annular groove. Clean the welding slag and debris on the surface of the welding plate and around the mandrel, and prepare for the welding operation of the next thin plate.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, the flipping unit adopts a structure that combines electromagnet adsorption and fixation with automatic flipping by a lifting spring. During the welding process, the electromagnet is energized to generate a strong attraction force to firmly adsorb the welding plate in the horizontal working position, ensuring that the workpiece does not shake during the welding process. When unloading, the electromagnet power supply is disconnected, and the lifting spring can automatically drive the welding plate to tilt to realize automatic unloading of the workpiece. There is no need for manual handling of high-temperature workpieces, which reduces the labor intensity of operators and avoids high-temperature burns.

[0016] 2. In this invention, the reverse magnetic field repulsion force generated by the sliding cutting of the magnetic field lines of the magnetic ring by the metal cylinder is used for the first-level non-contact buffering, and the air damping formed by the compression of the compressed spring by the telescopic rod and the slow exhaust of the exhaust hole is used for the second-level contact buffering. This can effectively slow down the falling speed of the metal cylinder and avoid the problems of scratches, dents and deformation on the surface of the metal cylinder that are easily caused by the traditional direct feeding method.

[0017] 3. In this invention, the elastic force of the extension spring inside the telescopic arm drives the pressing wheel to always be in close contact with the surface of the thin plate, and the rotating ring drives the pressing wheel to roll at a uniform speed along the circumference of the mandrel, which can uniformly roll the thin plate into a cylindrical structure. Attached Figure Description

[0018] Figure 1 This invention provides a three-dimensional structural schematic diagram of a high-power laser welding equipment for thin plate welding process; Figure 2 This invention provides a schematic diagram of the adjustment unit structure in the thin plate welding process of a high-power laser welding equipment; Figure 3This invention proposes a high-power laser welding device for thin plate welding processes. Figure 2 Partial disassembly diagram; Figure 4 This invention provides a schematic diagram of the bottom of an assembly plate in a thin plate welding process using a high-power laser welding device; Figure 5 This invention provides a partial schematic diagram of a flipping unit in a thin plate welding process using a high-power laser welding device. Figure 6 This invention proposes a high-power laser welding device for thin plate welding processes. Figure 5 Another perspective illustration; Figure 7 This invention provides a cross-sectional view of a telescopic rod in a thin plate welding process using a high-power laser welding device; Figure 8 This invention proposes a high-power laser welding device for thin plate welding processes. Figure 6 Enlarged view of point A; Figure 9 This invention proposes a high-power laser welding device for thin plate welding processes. Figure 6 Enlarged view of point B.

[0019] Legend: 1. Operating table; 2. Adjustment unit; 21. Connecting plate; 22. Assembly plate; 23. Track; 24. Slide rail; 25. Adjustment seat; 26. Lead screw; 27. Tightening bolt; 28. Sliding block; 3. Cross arm; 4. Control panel; 5. Lifting unit; 6. Laser welding head; 7. Fixing frame; 8. Tilting unit; 81. Fixing seat; 82. Welding plate; 83. Electromagnet; 84. Lifting spring; 9. Buffer unit; 91. Mandrel; 92. Annular groove; 93. Magnetic ring; 94. Slide groove; 95. Baffle; 96. Telescopic rod; 97. Compression spring; 98. Exhaust hole; 10. Deformation unit; 101. Fixing ring; 102. Rotating ring; 103. Drive motor; 104. Roller; 105. Annular groove; 106. Compression ring; 107. Telescopic arm; 108. Pressure wheel. Detailed Implementation

[0020] like Figure 1-9As shown, this invention provides a high-power laser welding equipment for thin plate welding, including a horizontally arranged operating table 1 and a fixed frame 7. The operating table 1 and the fixed frame 7 are arranged adjacent to each other and their upper surfaces are on the same horizontal plane. The operating table 1 is used to install a welding head adjustment mechanism, and the fixed frame 7 is used to install a workpiece forming and welding support mechanism. An adjustment unit 2 is fixedly installed on the upper surface of the operating table 1. The adjustment unit 2 includes a connecting plate 21 horizontally fixedly installed on the upper surface of the operating table 1. Two parallel slide rails 24 are fixedly installed on the upper surface of the connecting plate 21 along a first horizontal direction. The two slide rails 24 are symmetrically arranged on both sides of the connecting plate 21. A sliding block is slidably connected to the surface of each slide rail 24. The sliding block can slide back and forth along the length direction of the slide rail 24. A horizontal assembly plate 22 is fixedly connected to the upper surface of the two sliding blocks. The assembly plate 22 can slide synchronously with the sliding block along the first horizontal direction. A track 23 is fixedly installed on the upper surface of the assembly plate 22 along the second horizontal direction. The second horizontal direction is perpendicular to the first horizontal direction. The bottom of the cross arm 3 is slidably connected to the surface of the track 23. The cross arm 3 can slide back and forth along the length of the track 23, thereby realizing the position adjustment of the cross arm 3 in two mutually perpendicular directions in the horizontal plane. A control screen 4 is fixedly installed on the upper surface of the cross arm 3. The control screen 4 is electrically connected to the laser welding head 6 and is used to adjust the welding parameters such as the output power, welding speed and pulse frequency of the laser welding head 6. An adjusting seat 25 is fixedly connected to the upper end face of the connecting plate 21 at the position between the two slide rails 24. A lead screw 26 is rotatably connected to the bottom of the assembly plate 22. The axis of the lead screw 26 is parallel to the first horizontal direction. One end of the lead screw 26 is threaded through the adjusting seat 25 and extends to the outside of the adjusting seat 25. A handwheel is fixedly connected to the extended end of the lead screw 26. Rotating the handwheel can drive the lead screw 26 to rotate, thereby driving the assembly plate 22 to slide back and forth along the slide rail 24 through the sliding block, so as to achieve precise position adjustment in the first horizontal direction. A clamping bolt 27 is threaded into the side wall of the sliding block. Tightening the clamping bolt 27 can make its end abut against the side wall of the slide rail 24, thereby fixing the sliding block and the assembly plate 22 in the current position and preventing displacement during welding. A lifting unit 5 is vertically fixed at the end of the horizontal arm 3 away from the adjustment unit 2. The laser welding head 6 is fixedly installed at the bottom of the lifting unit 5. The light outlet of the laser welding head 6 faces the fixed frame 7 below. The lifting unit 5 can drive the laser welding head 6 to move back and forth in the vertical direction, adjust the distance between the light outlet of the laser welding head 6 and the workpiece to be welded, and ensure that the laser focus is accurately placed on the gap to be welded.A flipping unit 8 is rotatably mounted on the upper end of the fixed frame 7. The flipping unit 8 includes two fixed seats 81 symmetrically fixed on the upper end of the fixed frame 7. A horizontal welding plate 82 is rotatably mounted between the two fixed seats 81. The rotation axis of the welding plate 82 is parallel to the first horizontal direction. An electromagnet 83 is fixedly connected to the upper end face of the fixed seat 81. When the electromagnet 83 is energized, it generates a downward electromagnetic attraction force, which attracts and fixes the bottom of the welding plate 82 to the horizontal working position. A plurality of lifting springs 84 are fixedly connected between the lower end face of the welding plate 82 and the upper end face of the fixed frame 7. The plurality of lifting springs 84 are evenly arranged on both sides of the bottom of the welding plate 82. When the power supply to the electromagnet 83 is disconnected, the elastic force of the lifting springs 84 can drive the welding plate 82 to rotate downward around the rotation axis and tilt, so that the workpiece on the welding plate 82 can be automatically unloaded along the tilt direction. A buffer unit 9 is fixedly installed on the upper end face of the welding plate 82. The buffer unit 9 includes a mandrel 91 that is horizontally fixed on the upper end face of the welding plate 82. The axis of the mandrel 91 is perpendicular to the rotation axis of the welding plate 82. One end of the mandrel 91 is fixed to the edge of the welding plate 82, and the other end extends outward. An annular groove 92 is formed on the outer surface of the mandrel 91 along the circumferential direction. A magnetic ring 93 is slidably fitted on the surface of the annular groove 92. The magnetic ring 93 can slide back and forth along the length direction of the annular groove 92. When the welded metal cylinder is tilted and unloaded, it can slide along the axial direction of the mandrel 91. During the sliding process, the metal cylinder will cut the magnetic field lines generated by the magnetic ring 93, generate an induced current inside the metal cylinder and form an induced magnetic field opposite to the magnetic field of the magnetic ring 93. The two magnetic fields repel each other and generate a buffer force, which slows down the sliding speed of the metal cylinder. A groove 94 is axially formed on the outer surface of the mandrel 91, which communicates with an annular groove 92. A telescopic rod 96 is fixedly installed inside the groove 94, with its axis parallel to the axis of the mandrel 91. A baffle 95 is fixedly connected to one end of the telescopic rod 96 near the magnetic ring 93, with the upper end of the baffle 95 extending into the annular groove 92 and contacting the end face of the magnetic ring 93. A compression spring 97 is fixedly connected inside the telescopic rod 96, with both ends of the compression spring 97 connected to the telescopic rod 96. The inner wall of 6 is fixedly connected to the movable end of the telescopic rod 96. The side wall of the telescopic rod 96 is provided with multiple exhaust holes 98, which are evenly distributed on the side wall of the telescopic rod 96. When the magnetic ring 93 slides outward along the annular groove 92, it will push the baffle 95 to cause the telescopic rod 96 to retract. The compressed spring 97 is compressed to generate elastic resistance. At the same time, the air inside the telescopic rod 96 is slowly discharged through the exhaust holes 98, forming air damping, which further slows down the sliding speed of the magnetic ring 93 and the metal cylinder.A deformation unit 10 is also fixedly installed on the upper end face of the welding plate 82. The deformation unit 10 includes a fixing ring 101 coaxially fixedly installed on the upper end face of the welding plate 82. The fixing ring 101 is sleeved on the outside of the mandrel 91. The bottom of the fixing ring 101 is fixedly connected to the upper end face of the welding plate 82. A ring groove 105 is formed on the outer surface of the fixing ring 101 along the circumferential direction. A rotating ring 102 is rotatably connected inside the ring groove 105. The rotating ring 102 can rotate freely around the axis of the fixing ring 101. Multiple telescopic arms 107 are uniformly fixedly installed on the inner surface of the rotating ring 102 along the circumferential direction. Arranged radially along the rotating ring 102, the telescopic arm 107 is equipped with an extension spring inside. The two ends of the extension spring are fixedly connected to the inner wall of the telescopic arm 107 and the movable end of the telescopic arm 107, respectively. A pressure wheel 108 is rotatably mounted on one end of the telescopic arm 107 near the spindle 91. The axis of the pressure wheel 108 is parallel to the axis of the spindle 91. The elastic force of the extension spring can drive the pressure wheel 108 to always press on the surface of the metal sheet to be welded. When the rotating ring 102 rotates, it can drive the pressure wheel 108 to roll around the circumference of the spindle 91, and cooperate with the spindle 91 to gradually roll the metal sheet into a cylindrical structure. A drive motor 103 is fixedly mounted on the upper end face of the welding plate 82. The output shaft of the drive motor 103 is arranged horizontally and parallel to the axis of the rotating ring 102. A roller 104 is fixedly mounted on the output shaft of the drive motor 103. The roller 104 is made of rubber and has good friction and elasticity. An annular pressure ring 106 is fixedly connected to the outer surface of the rotating ring 102. The outer surface of the roller 104 abuts against the outer surface of the pressure ring 106. When the drive motor 103 drives the roller 104 to rotate, the friction between the roller 104 and the pressure ring 106 can drive the pressure ring 106 and the rotating ring 102 to rotate around the axis of the fixed ring 101, thereby driving the pressing roller 108 to complete the roll forming operation.

[0021] The working principle is as follows: First, the main power supply of the equipment is turned on, so that the electromagnet 83 is energized and generates a downward electromagnetic attraction force, which attracts and fixes the welding plate 82 in a horizontal working position. The magnetic ring 93 is pushed along the annular groove 92 to the initial position close to the fixing ring 101. The output power, welding speed and lifting height parameters of the laser welding head 6 are preset by the control panel 4. The drive motor 103, lifting unit 5 and adjustment unit 2 are tested under no-load to confirm that each component is operating normally without jamming. Then, one end of the metal sheet cut to the specified size is attached to the surface of the mandrel 91. The sheet is initially bent along the circumference of the mandrel 91 to align the two ends of the sheet and leave a uniform welding gap. The sheet is initially inserted into the gap between the mandrel 91 and the pressure wheel 108. The extension spring inside the telescopic arm 107 drives the pressure wheel 108 to press tightly against the surface of the sheet, realizing the initial positioning of the sheet. Start the drive motor 103, which drives the rubber roller 104 to rotate. The friction between the roller 104 and the pressure ring 106 drives the pressure ring 106 and the rotating ring 102 to rotate at a constant speed around the annular groove 105 of the fixed ring 101. The rotating ring 102 drives multiple telescopic arms 107 and pressing rollers 108 to roll synchronously along the circumference of the mandrel 91. During the rolling process, the pressing rollers 108 cooperate with the mandrel 91 to gradually roll the thin plate into a complete cylindrical structure, ensuring that there is no misalignment or gap at the edge to be welded. After the rolling is completed, turn off the drive motor 103. Rotating the handwheel at the end of the lead screw 26 causes the lead screw 26 to rotate, which in turn causes the assembly plate 22 to slide along the slide rail 24 in the first horizontal direction via the sliding block. Simultaneously, the sliding cross arm 3 moves along the track 23 in the second horizontal direction. This, combined with the lifting unit 5, adjusts the vertical height of the laser welding head 6, ensuring that the focus of the laser welding head 6 is precisely aligned with the starting point of the weld seam on the cylindrical thin plate. Tightening the locking bolt 27 on the sliding block fixes the position of the cross arm 3 and the laser welding head 6. The laser welding head 6 is then started, and the adjusting unit 2 moves it linearly at a uniform speed along the weld seam, continuously welding the longitudinal edge seam of the cylindrical thin plate. During welding, the control panel 4 monitors the welding power and weld formation status in real time, fine-tuning the welding parameters as needed to ensure weld quality. After welding is complete, the laser welding head 6 is turned off, and the adjusting unit 2 moves it to a safe position. The continuity, flatness, and penetration of the weld are visually inspected to confirm the absence of welding defects such as incomplete welds, burn-through, weld beads, and undercut. If defects are found, repair welding is performed. When the power supply to electromagnet 83 is disconnected, the electromagnetic attraction of electromagnet 83 disappears, and the elastic force of spring 84 drives welding plate 82 to rotate downward around the rotation axis of fixed base 81. Under the action of gravity, the welded metal cylinder slides outward along the axis of mandrel 91. During the sliding process, the metal cylinder cuts the magnetic field lines generated by magnetic ring 93, generating an induced current inside the metal cylinder and forming an induced magnetic field opposite to the magnetic field of magnetic ring 93. The two magnetic fields repel each other, generating a first-level buffer force to slow down the sliding speed of the metal cylinder.The metal cylinder continues to slide, pushing the magnetic ring 93 outward along the annular groove 92. The magnetic ring 93 pushes the baffle 95, causing the telescopic rod 96 to retract. The compressed spring 97 is compressed, generating secondary elastic resistance. At the same time, the air inside the telescopic rod 96 is slowly discharged through the exhaust hole 98, forming air damping, further slowing down the sliding speed of the magnetic ring 93 and the metal cylinder, allowing the metal cylinder to fall slowly and smoothly to the collection area below, avoiding direct drop that could cause surface scratches or deformation. After the material is unloaded, the power to the electromagnet 83 is reconnected. The electromagnet 83 generates electromagnetic attraction to pull the welding plate 82 back to the horizontal working state. The compressed spring 97 inside the telescopic rod 96 pushes the baffle 95 and the magnetic ring 93 back to the initial position along the annular groove 92, cleaning the surface of the welding plate 82 and the welding slag and debris around the mandrel 91, preparing for the welding operation of the next thin plate.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A high-power laser welding device, comprising an operating table (1) and a fixing frame (7), characterized in that: An adjustment unit (2) is installed at the upper end of the operating table (1). A cross arm (3) is installed at the upper end of the adjustment unit (2). The cross arm (3) can slide along the adjustment unit (2) and its position can be adjusted in the plane with the help of the adjustment unit (2). A liftable laser welding head (6) is provided at the port of the cross arm (3). A flipping unit (8) is provided at the upper end of the fixing frame (7). The thin plate to be processed can be placed on the surface of the buffer unit (9) on the flipping unit (8) and bent into a cylindrical structure by the deformation unit (10). The edge gap of the cylindrical metal plate is welded with the laser welding head (6) to form a complete metal cylinder. The complete metal cylinder can be fed along the buffer unit (9) by flipping with the help of the flipping unit (8). The buffer unit (9) can buffer the discharge of the metal cylinder by electromagnetic effect to avoid direct drop and damage.

2. The high-power laser welding equipment according to claim 1, characterized in that: The adjustment unit (2) includes a connecting plate (21), a slide rail (24) is installed on the upper end of the connecting plate (21), a sliding block (28) is slidably connected to the surface of the slide rail (24), an assembly plate (22) is fixedly connected to the upper end of the sliding block (28), a track (23) is fixedly connected to the upper end of the assembly plate (22), the cross arm (3) can slide on the track (23), push the assembly plate (22) to slide on the surface of the slide rail (24), and then slide the cross arm (3) along the track (23) to adjust the position of the laser welding head (6). A control screen (4) is fixedly installed on the surface of the cross arm (3), and the power of the laser welding head (6) can be adjusted by using the control screen (4).

3. The high-power laser welding equipment according to claim 2, characterized in that: The upper end of the connecting plate (21) is fixedly connected to the adjusting seat (25), and the bottom of the assembly plate (22) is rotatably connected to the lead screw (26). The lead screw (26) and the adjusting seat (25) are threaded together. The assembly plate (22) can be controlled to slide and adjust its position on the surface of the slide rail (24) by means of the sliding block (28). The sliding block (28) is threaded with a clamping bolt (27), which can be used to press against the slide rail (24) to fix the position of the cross arm (3).

4. The high-power laser welding equipment according to claim 3, characterized in that: A lifting unit (5) is fixedly installed at the port of the cross arm (3). The bottom end of the lifting unit (5) is fixed to the laser welding head (6). The position of the laser welding head (6) can be controlled in the vertical direction by using the lifting unit (5).

5. The high-power laser welding equipment according to claim 1 or 4, characterized in that: The flipping unit (8) includes a fixed base (81) fixedly installed with the fixed frame (7). A welding plate (82) is rotatably installed inside the fixed base (81). An electromagnet (83) is fixedly connected to the upper end of the fixed base (81). The electromagnet (83) generates a suction force to attract the welding plate (82) and keep the welding plate (82) horizontal. A lifting spring (84) is fixedly connected between the welding plate (82) and the fixed frame (7). When the power of the electromagnet (83) is disconnected, the elastic force of the lifting spring (84) can drive the welding plate (82) to rotate and tilt on the fixed base (81) to remove the metal sheet above.

6. The high-power laser welding equipment according to claim 5, characterized in that: The buffer unit (9) includes a mandrel (91), which is fixedly installed on the upper end of the welding plate (82). An annular groove (92) is provided on the surface of the mandrel (91), and a magnetic ring (93) is slidably fitted on the surface of the annular groove (92). A thin metal plate to be welded, bent into a cylindrical shape, is fitted on the surface of the mandrel (91). When the welded metal cylinder is tilted and unloaded, it can slide along the surface of the mandrel (91). During the sliding process, the metal cylinder cuts the magnetic field lines on the surface of the magnetic ring (93) to generate a corresponding magnetic field that repels the magnetic field of the magnetic ring (93) for buffering.

7. The high-power laser welding equipment according to claim 6, characterized in that: The surface of the mandrel (91) is provided with a groove (94), and a telescopic rod (96) is fixedly installed inside the groove (94). A baffle (95) is fixedly connected to one end of the telescopic rod (96). The baffle (95) can slide along the groove (94). A compression spring (97) is fixedly connected inside the telescopic rod (96). An exhaust hole (98) is provided on the surface of the telescopic rod (96). When the welding plate (82) is tilted for unloading, the magnetic ring (93) will slide along the surface of the annular groove (92) to squeeze the telescopic rod (96) with the help of the baffle (95). When the telescopic rod (96) contracts, it can squeeze the compression spring (97) and at the same time use the exhaust hole (98) to discharge the air inside the telescopic rod (96) to provide sliding damping for the magnetic ring (93).

8. The high-power laser welding equipment according to claim 7, characterized in that: The deformation unit (10) includes a fixing ring (101) fixedly installed on the upper end of the welding plate (82). The fixing ring (101) is sleeved on the surface of the mandrel (91). The surface of the fixing ring (101) is provided with an annular groove (105). A rotating ring (102) is rotatably connected inside the annular groove (105). A telescopic arm (107) is fixedly installed on the surface of the rotating ring (102). An extension spring is provided inside the telescopic arm (107). The telescopic arm (107) faces the center of the rotating ring (102). A pressure wheel (108) is rotatably installed at the end of the telescopic arm (107). The pressure wheel (108) can be driven by the elastic force of the extension spring to press it onto the surface of the metal sheet to be welded, which is bent into a cylindrical shape. The rotation of the rotating ring (102) can be used to make the pressure wheel (108) roll on the surface of the metal sheet to be welded, which is bent into a cylindrical shape, to cooperate with the mandrel (91) to press the metal sheet into a cylindrical structure.

9. The high-power laser welding equipment according to claim 8, characterized in that: A drive motor (103) is fixedly installed on the upper end of the welding plate (82). A roller (104) is installed on the output shaft of the drive motor (103). A pressure ring (106) is fixedly connected to the surface of the rotating ring (102). The roller (104) is a rubber wheel. The roller (104) abuts against the surface of the pressure ring (106). When the drive motor (103) drives the roller (104) to rotate, the rotating ring (102) can rotate inside the ring groove (105) to be rolled on the surface of the thin metal plate to be welded, which is bent into a cylindrical shape, by means of the pressure wheel (108).

10. A high-power laser welding equipment for thin plate welding process, characterized in that: The high-power laser welding equipment according to claim 9 includes the following steps: S1. Turn on the main power supply of the equipment, so that the electromagnet (83) is energized and generates a suction force to attract the welding plate (82) and keep it in a horizontal state. Push the magnetic ring (93) along the annular groove (92) to the initial position close to the fixed ring (101). Preset the output power, welding speed and lifting height parameters of the laser welding head (6) through the control panel (4). Run the deformation unit (10), buffer unit (9) and adjustment unit (2) under no-load test to confirm that each component is operating normally. S2. Place one end of the metal sheet cut to the specified size onto the surface of the mandrel (91), bend the sheet in the circumference of the mandrel (91) to align the edges of the sheet and leave a uniform welding gap, and insert the sheet into the gap between the mandrel (91) and the pressure roller (108). S3. Start the drive motor (103). The drive motor (103) drives the pressure ring (106) and the rotating ring (102) to rotate at a constant speed around the annular groove (105) of the fixed ring (101) via the rubber roller (104). The extension spring inside the telescopic arm (107) drives the pressing wheel (108) to always press tightly against the surface of the thin plate. As the pressing wheel (108) rolls with the rotating ring (102), it cooperates with the mandrel (91) to gradually roll the thin plate into a complete cylindrical structure, ensuring that there is no misalignment or gap at the edge to be welded. S4. Rotate the screw (26) to adjust the assembly plate (22) to slide along the slide rail (24), and at the same time, slide the cross arm (3) to move along the track (23). In conjunction with the lifting unit (5), adjust the vertical height of the laser welding head (6) so that the focus of the laser welding head (6) is precisely aligned with the starting point of the weld seam of the cylindrical thin plate. Tighten the clamping bolt (27) to fix the position of the cross arm (3). S5. Start the laser welding head (6). The laser welding head (6) is driven to move at a constant speed in a straight line along the gap to be welded by the adjustment unit (2). The longitudinal edge gap of the cylindrical thin plate is continuously welded. During the welding process, the welding power and weld formation status are monitored in real time by the control screen (4), and the welding parameters are finely adjusted in time. S6. After welding is completed, turn off the laser welding head (6), and move the laser welding head (6) to a safe position by adjusting the unit (2). Visually inspect the continuity, flatness and penetration of the weld to confirm that there are no welding defects such as missed welds, burn-through, weld beads, or undercut. S7. Disconnect the power supply to the electromagnet (83), and the elastic force of the spring (84) drives the welding plate (82) to rotate and tilt around the fixed seat (81). The welded metal cylinder slides outward along the surface of the spindle (91). During the sliding process, the metal cylinder cuts the magnetic field lines on the surface of the magnetic ring (93) to generate a reverse repulsive force for the first-level electromagnetic buffer. The sliding of the magnetic ring (93) drives the baffle (95) to squeeze the telescopic rod (96). The compression of the compressed spring (97) and the slow exhaust of the exhaust hole (98) provide the second-level damping buffer, so that the metal cylinder falls slowly and steadily to the collection area. S8. After the material is unloaded, the power supply of the electromagnet (83) is turned on again. The electromagnet (83) attracts the welding plate (82) back to the horizontal working state. The compression spring (97) inside the telescopic rod (96) pushes the baffle (95) and the magnetic ring (93) back to the initial position along the annular groove (92). Clean the welding slag and debris on the surface of the welding plate (82) and around the mandrel (91) to prepare for the welding operation of the next thin plate.

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