A laser welding device and process for steel structure welding reinforcement

Abstract

This invention relates to the field of laser welding technology, and discloses a laser welding device and process for steel structure welding reinforcement. The device includes a welding base, a welding table fixedly connected to the top of the welding base, a base fixedly connected to the center of the welding table, a servo motor fixedly connected to one side of the base, a bidirectional threaded rod fixedly connected to the output end of the servo motor, an adjusting seat threadedly connected to the external thread of the bidirectional threaded rod, a lifting platform on the top of the adjusting platform, and two symmetrically arranged telescopic blocks fixedly connected to one side of the lifting platform. A lead screw is rotatably connected to the bottom of each telescopic block. By adapting to structural components of different thicknesses, the device can automatically move the suction cup at the bottom. The movement of the suction cup allows for adjustment of the distance between two structural components to form a more suitable weld.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding device and process for welding and reinforcing steel structures. Background Technology

[0002] In industrial production and infrastructure construction, steel structures are widely used in key areas such as building engineering, bridge construction, and heavy machinery manufacturing due to their outstanding advantages such as high load-bearing capacity, wide span coverage, and convenient installation. However, during long-term service, steel structures are affected by complex working conditions, such as stress fluctuations caused by frequent load changes, corrosion damage caused by rain and moisture in the natural environment, and fatigue effects from long-term use. These factors can cause defects such as cracks, local deformation, and strength reduction in steel structures. At this time, welding reinforcement technology is needed to repair them to restore the original performance of the structure and even improve its load-bearing capacity, ensuring safe use in the future.

[0003] With the rapid development and maturation of laser technology, laser welding has gradually been applied in the field of steel structure reinforcement due to its unique technical advantages. During laser welding, energy is highly concentrated, and the heat input is easy to control precisely, which can effectively reduce the range of the heat-affected zone of the weld, minimize welding deformation and residual stress in steel structure components, and ensure the original structural stability of the components.

[0004] During the welding of structural components, materials need to be placed on a workbench for welding. When welding structural components of different thicknesses, if a thicker component is encountered, the laser beam energy cannot reach the root of the plate, resulting in incomplete fusion at the bottom of the weld. This significantly reduces the effective load-bearing cross-section of the weld, leading to insufficient root strength and susceptibility to cracking under stress. Furthermore, different weld widths need to be adjusted between structural components of varying thicknesses. The difference in material thickness directly causes a differentiation in heat conduction gradients. Dynamically matching the thickness of the structural components and adjusting the weld width to ensure deep penetration of the weld is a crucial prerequisite for quality assurance. However, the weld distance after the structural components are fixed is mostly fixed. The traditional method of adjusting the weld before fixing the component requires measurement, prediction, and repeated adjustments. This traditional process is complex, inefficient, and cannot adjust the distance in real time according to structural components of different thicknesses, thus failing to adaptively adjust the distance between two structural components based on their thickness. Summary of the Invention

[0005] Given that existing technologies make it difficult to adjust weld seams for structural components of different thicknesses, a laser welding device for steel structure welding reinforcement is proposed.

[0006] One aspect of this application provides a laser welding device for steel structure welding reinforcement, the purpose of which is to be used when different widths of welds are required for structural components of different thicknesses.

[0007] The technical solution of this invention is as follows: A laser welding device for steel structure welding reinforcement includes a welding base, a welding table fixedly connected to the top of the welding base, a base fixedly connected to the center of the welding table, a servo motor fixedly connected to one side inside the base, a bidirectional threaded rod fixedly connected to the output end of the servo motor, an adjusting seat threadedly connected to the bidirectional threaded rod, a lifting platform movably arranged on the top of the adjusting platform, two symmetrically arranged telescopic blocks fixedly connected to one side of the lifting platform, a lead screw rotatably connected to the bottom of the telescopic blocks, a mounting seat rotatably connected to the lead screw via a bearing, the other end of the mounting seat fixedly connected to the inner wall of the base, and a first bevel gear threadedly connected to the rod wall near the bottom of the lead screw. The bottom of the first bevel gear is rotatably connected to a mounting block via a bearing. One side of the mounting block is fixedly connected to the base. One side of the first bevel gear is meshed with a second bevel gear. One side of the second bevel gear is fixedly connected to a rotating threaded rod. A sliding block is threadedly connected to the external thread of the rotating threaded rod. A mounting base is rotatably connected to one end of the sliding block near the rotating threaded rod. The bottom of the mounting base is fixedly connected to the bottom wall of the base. The other end of the rotating threaded rod is rotatably connected to a first fixed seat. The bottom of the first fixed seat is fixedly connected to the top of the base. A connecting column is fixedly connected to the top of the sliding block. A linkage block is fixedly connected to the top of the connecting column. Multiple suction cups are fixedly connected to the top of the linkage block.

[0008] Furthermore, the bidirectional threaded rod is symmetrically threaded with two threaded moving blocks. The bottom of the threaded moving blocks is symmetrically rotatably connected to two connecting arms via pins. The other end of the connecting arms is rotatably connected to a clamping moving block via pins. A limit plate is slidably connected between the two clamping moving blocks. The two ends of the limit plate are fixedly connected to the base platform. A clamping block is fixedly connected to the top of the clamping moving blocks. A placement platform is fixedly connected to the top of the base platform. Clamping grooves are opened on both sides of the placement platform corresponding to the positions of the clamping blocks. Adjustment grooves are opened on both sides of the placement platform corresponding to the positions of the suction cups.

[0009] Furthermore, a mounting groove is provided on one side of the placement platform, and a rotating block is rotatably connected to the mounting groove via a pin. A pressing fixing block is fixedly connected to one side of the rotating block. Torsion springs are respectively provided on the surfaces of both ends of the rotating block. One end of the torsion spring is fixedly connected to the mounting groove, and the other end of the torsion spring is fixedly connected to the pressing fixing block.

[0010] Furthermore, a limiting moving block is fixedly connected to the bottom of the sliding block, and a limiting slider is fixedly connected to the bottom wall of the base platform at the position corresponding to the limiting moving block. The other end of the limiting slider is fixedly connected to one side of the first fixed seat. A limiting groove is opened inside the limiting slider at the position corresponding to the limiting moving block. The two sides of the limiting moving block are slidably connected to the inner wall of the limiting groove. A ratchet is fixedly connected to the bottom of the limiting moving block, and a ratchet block is fixedly connected to the limiting slider at the position corresponding to the ratchet. A check pawl is rotatably connected to one side of the ratchet block through a torsion spring. An electric telescopic adjustment rod is rotatably connected to the side of the ratchet block corresponding to the check pawl. The other end of the electric telescopic adjustment rod is rotatably connected to the top side of the check pawl.

[0011] Furthermore, the adjusting seat has a sliding groove on one side corresponding to the mounting seat, one side of the mounting seat is slidably engaged in the sliding groove, one side of the adjusting seat is fixedly connected to a connecting base plate, a connecting top plate is slidably engaged in the connecting base plate, and one side of the top of the connecting top plate is fixedly connected to one side of the lifting platform.

[0012] Furthermore, a buffer groove is provided inside the adjusting seat. Several sliding rods are fixedly connected to the bottom of the buffer groove. A limiting block is slidably connected to the surface of the several sliding rods. Several first spring telescopic rods are fixedly connected to one side of the limiting block. The other end of the several first spring telescopic rods is fixedly connected to the same connecting plate. Several second spring telescopic rods are fixedly connected to one side of the top of the connecting plate. A connecting groove is provided at the bottom of the lifting platform corresponding to the position of the second spring telescopic rods. The other end of the second spring telescopic rods is fixedly connected to the inner wall of the connecting groove. The connecting plate is slidably connected between the connecting groove and the buffer groove.

[0013] Furthermore, the adjusting seat is provided with an inclined surface, and several rollers are tumbling connected to the inclined surface.

[0014] Furthermore, the side of the clamping block that holds the material is made of rubber, and the suction cup and the placement platform have a slightly convex design.

[0015] Furthermore, the present invention also provides a laser welding process for steel structure welding reinforcement, employing a laser welding device for steel structure welding reinforcement, comprising the following steps:

[0016] Step 1: Thoroughly clean the oil and rust stains in the area to be welded on the welding table. Precisely process the bevel and workpiece according to the drawing. After cleaning, place the workpiece on the placement table and clamp it with the clamping block to fix the position for welding.

[0017] Step 2: Set the laser power, speed, defocusing amount, and shielding gas flow rate according to the material thickness and joint type, calibrate the laser beam focus, introduce shielding gas, start the laser, and begin welding using ramp control;

[0018] Step 3: The laser head moves along the preset path to perform welding. It can selectively and precisely feed wire to fill the weld seam of thick plates, monitor the state of the molten pool and key parameters in real time, and dynamically fine-tune to ensure stable penetration and forming.

[0019] Step 4: When finishing the weld, use power and speed to descend at a ramp to fill the crater, keep the clamping blocks tight or apply local cooling measures to control the cooling rate of the workpiece to reduce deformation and stress.

[0020] The beneficial effects of this invention are:

[0021] First, place the two structural components firmly onto the placement platform. A servo motor drives a bidirectional threaded rod to rotate, causing the adjusting seat and lifting platform to move closer to the structural components. The structural components then push the lifting platform upwards, causing it to rise and move the rotating threaded rod and suction cup. The suction cup then moves the structural components, creating a certain width between them. By adapting to structural components of different thicknesses, the device can automatically move the suction cup at the bottom. This movement of the suction cup allows for adjustments to the distance between the two structural components, resulting in a more suitable weld.

[0022] When the servo motor drives the bidirectional threaded rod to rotate, the threaded moving blocks on both sides move in tandem with the rotation of the bidirectional threaded rod. Simultaneously, the moving bidirectional threaded rod pulls the connecting arm, which in turn moves the clamping moving block on one side against the limit plate. This causes the clamping moving block to gradually approach the structural component, clamping and fixing it in place. The clamping blocks ensure uniform weld gaps, preventing alignment issues during welding that could lead to burn-through or incomplete welds, and facilitating welding between structural components.

[0023] By rotating the pressing and fixing block, the torsion spring is simultaneously rotated and twisted, allowing one of the structural components to be placed under the pressing and fixing block. Then, the pressing and fixing block is released, and the rebound force of the torsion spring drives the rotating block and the pressing and fixing block to fix one of the structural components, thus limiting and fixing one of the structural components. This makes it more accurate to adjust the position of the other structural component. One structural component is rigidly fixed, while the other side is designed to be adjustable, eliminating the cumulative tolerance error that occurs during the laser welding process of the structural components. Attached Figure Description

[0024] Figure 1 This is a perspective view of the laser welding device for steel structure welding reinforcement according to the present invention;

[0025] Figure 2 This is a schematic diagram of the welding station installation of the present invention;

[0026] Figure 3This is a cross-sectional schematic diagram of the welding station of the present invention;

[0027] Figure 4 This is a schematic diagram of the welding station installation of the present invention;

[0028] Figure 5 This is a schematic diagram of the rotating block installation of the present invention;

[0029] Figure 6 This is a schematic diagram of the bidirectional threaded rod connection structure of the present invention;

[0030] Figure 7 This is a perspective view of the adjustment seat of the present invention;

[0031] Figure 8 This is a bottom view of the placement platform of the present invention;

[0032] Figure 9 This is a schematic diagram of the meshing of the first bevel gear and the second bevel gear of the present invention;

[0033] Figure 10 This is a schematic diagram showing the connection between the limiting slider and the limiting groove of the present invention;

[0034] Figure 11 This is a schematic diagram of the connection between the top plate and the bottom plate of the present invention;

[0035] Figure 12 This is a schematic diagram of the interior of the adjusting seat of the present invention;

[0036] In the picture:

[0037] 1. Welding seat; 2. Welding table; 3. Base; 4. Servo motor; 5. Bidirectional threaded rod; 6. Adjustment seat; 7. Lifting platform; 8. Telescopic block; 9. Lead screw; 10. Mounting seat; 11. First bevel gear; 12. Mounting block; 13. Second bevel gear; 14. Rotating threaded rod; 15. Mounting base; 16. Sliding block; 17. First fixed seat; 18. Connecting column; 19. Linkage block; 20. Suction cup; 21. Threaded moving block; 22. Connecting arm; 23. Clamping moving block; 24. Limiting plate; 25. Clamping block; 26. Placement platform; 27. Adjustment groove; 28. Clamping groove; 29. ​​Mounting groove; 30. Rotating block; 31. Torsion spring; 32. Pressing and fixing block; 33. Connecting top plate; 34. Connecting bottom plate; 35. Sliding groove; 36. Buffer groove; 37. Sliding rod; 38. Limiting block; 39. First spring telescopic rod; 40. Connecting plate; 41. Second spring telescopic rod; 42. Connecting groove; 43. Roller; 44. Limiting slider; 45. Limiting slide groove; 46. Limiting moving block; 47. Ratchet; 48. Ratchet block; 49. Anti-return ratchet; 50. Electric telescopic adjustment rod. Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Example 1, referring to Figures 1-12 The first embodiment of the present invention provides a laser welding device for steel structure welding reinforcement, including a welding seat 1, a welding platform 2 fixedly connected to the top of the welding seat 1, a base 3 fixedly connected to the center of the welding platform 2, a servo motor 4 fixedly connected to one side inside the base 3, and a bidirectional threaded rod 5 fixedly connected to the output end of the servo motor 4. The two ends of the bidirectional threaded rod 5 have threads with opposite directions of rotation. When the bidirectional threaded rod 5 is rotated, the bidirectional threaded rod 5 will drive the threaded moving blocks 21 at both ends to move closer or further away at the same time.

[0040] The bidirectional threaded rod 5 is threadedly connected to an adjusting seat 6. A lifting platform 7 is movably mounted on the top of the adjusting seat 6. Two symmetrically arranged telescopic blocks 8 are fixedly connected to one side of the lifting platform 7. A lead screw 9 is rotatably connected to the bottom of the telescopic block 8. The lead screw 9 is rotatably connected to a mounting seat 10 through a bearing. When the adjusting seat 6 and the lifting platform 7 move, the telescopic blocks 8 and the mounting seat 10 are simultaneously moved in and out. The telescopic blocks 8 and the mounting seat 10 provide support while limiting the lead screw 9 to prevent it from moving laterally along with the adjusting seat 6 and the lifting platform 7.

[0041] The other end of the mounting base 10 is fixedly connected to the inner wall of the base 3. A first bevel gear 11 is threadedly connected to the rod wall of the lead screw 9 near the bottom. The bottom of the first bevel gear 11 is rotatably connected to the mounting block 12 through a bearing. One side of the mounting block 12 is fixedly connected to the base 3. A second bevel gear 13 is meshed with one side of the first bevel gear 11. The rising lead screw 9 drives the first bevel gear 11 to rotate, thereby driving the second bevel gear 13 to rotate with the bidirectional threaded rod 5. The tooth profile of the bevel gear is designed on a conical surface, which can efficiently transmit rotational motion and power from one direction to another, realizing direction conversion.

[0042] A rotating threaded rod 14 is fixedly connected to one side of the second bevel gear 13. A sliding block 16 is threadedly connected to the external thread of the rotating threaded rod 14. A mounting base 15 is rotatably connected to one end of the sliding block 16 near the rotating threaded rod 14. The bottom of the mounting base 15 is fixedly connected to the inner bottom wall of the base platform 3. A first fixed seat 17 is rotatably connected to the other end of the rotating threaded rod 14. The rotating threaded rod 14 is supported and installed by the first fixed seat 17 and the mounting base 15, so that the rotating threaded rod 14 can rotate while being fixed at a fixed height.

[0043] The bottom of the first fixed seat 17 is fixedly connected to the top of the base 3. The top of the sliding block 16 is fixedly connected to the connecting column 18, the top of the connecting column 18 is fixedly connected to the linkage block 19, and the top of the linkage block 19 is fixedly connected to multiple suction cups 20. The two structural components are placed close to the placement table 26, so that one of the structural components is attracted and fixed by the suction cup 20. The servo motor 4 drives the bidirectional threaded rod 5 to rotate, so that the adjusting seat 6 and the lifting platform 7 move closer to the structural component. The structural component slides on the inclined surface of the adjusting seat 6 until it contacts the lifting platform. 7. The structural components will then push the lifting platform 7 upwards, causing the lifting platform 7 to rise. Simultaneously, the telescopic block 8 and the lead screw 9 will move upwards. As the lead screw 9 moves upwards, it will cause the first bevel gear 11 to rise, rotating the first bevel gear 11, the second bevel gear 13, and the rotating threaded rod 14. The rotating threaded rod 14 then drives the sliding block 16, the connecting column 18, the linkage block 19, and the suction cup 20 to move. The suction cup 20 then moves the structural components, creating a certain width between the two structural components. This creates a weld with an effective load-bearing cross-section. The lifting platform 7 is raised to the height corresponding to the thickness of the structural component, driven by structural components of varying thicknesses. The higher the structural component, the higher the lifting platform 7 is raised, and the greater the distance the lifting platform 7 causes the lead screw 9 to rise. Simultaneously, the first bevel gear 11 drives the second bevel gear 13 and the rotating threaded rod 14 to rotate, causing the sliding block 16 to move further. As the structural component thicker, the suction cup 20 at the bottom adjusts its distance according to the thickness, creating a suitable distance between the two structural components. This prevents the two structural components from fitting too tightly, which would prevent the laser beam energy from reaching the root of the plate, resulting in incomplete fusion at the bottom of the weld. This effectively controls the weld between the two structural components, significantly increasing the effective load-bearing cross-section of the weld, ensuring sufficient root strength, and preventing cracking under stress. Furthermore, welding wire can be added between the two structural components during laser welding, making the weld more robust and guaranteeing the quality of thick plate laser welding. The thread distance between the lead screw 9 and the rotating threaded rod 14 can also be adjusted to double the efficiency of structural component displacement.

[0044] Reference Figure 8 Two threaded moving blocks 21 are symmetrically threaded on the bidirectional threaded rod 5. The bottom of the threaded moving blocks 21 is symmetrically connected to two connecting arms 22 by pins. The other end of the connecting arms 22 is rotatably connected to a clamping moving block 23 by pins. A limit plate 24 is slidably connected between the two clamping moving blocks 23. The limit plate 24 limits the clamping moving blocks 23. When the clamping moving blocks 23 are pulled by the connecting arms 22, the limit plate 24 limits the clamping moving blocks 23, so that the clamping moving blocks 23 always move on the limit plate 24, preventing the clamping moving blocks 23 from moving off course.

[0045] The limiting plate 24 is fixedly connected to the bottom platform 3 at both ends. The clamping moving block 23 is fixedly connected to the top of the clamping block 25. The bottom platform 3 is fixedly connected to the top of the platform 3. The two sides of the platform 26 are provided with clamping grooves 28 corresponding to the positions of the clamping blocks 25. The two sides of the platform 26 are provided with adjustment grooves 27 corresponding to the positions of the suction cups 20. With the setting of the lifting platform 7, when the suction cups 20 move, the suction cups 20 drive the structural components to move within the lifting platform 7, so that the lifting platform 7 can drive the structural components to move and adjust.

[0046] When the servo motor 4 drives the bidirectional threaded rod 5 to rotate, the threaded moving blocks 21 on both sides will move by rotating the bidirectional threaded rod 5. When the bidirectional threaded rod 5 moves, it synchronously pulls the connecting arm 22 to move. When the connecting arm 22 moves, it drives the clamping moving block 23 on one side to move on the limiting plate 24, so that the clamping moving block 23 drives the clamping block 25 to gradually approach the structural component. The clamping block 25 clamps and fixes the structural component. Through rigid and repeatable clamping, the workpiece is accurately fixed in the predetermined position. The strong clamping forcefully aligns the edge to be welded, keeping the two structural components in an aligned state. This ensures the uniformity and stability of the gap along the entire weld length, effectively preventing misalignment of the two structural components, which can lead to problems such as weld burn-through and incomplete welding. This significantly improves the strength, sealing performance, and appearance consistency of the weld.

[0047] Reference Figure 5 A mounting groove 29 is provided on one side of the placement platform 26. A rotating block 30 is rotatably connected to the mounting groove 29 via a pin. A pressing block 32 is fixedly connected to one side of the rotating block 30. Torsion springs 31 are respectively provided on the surfaces of both ends of the rotating block 30. One end of the torsion spring 31 is fixedly connected to the mounting groove 29, and the other end of the torsion spring 31 is fixedly connected to the pressing block 32. First, the pressing block 32 is rotated, which simultaneously drives the torsion spring 31 to rotate and twist. When the rotation of the pressing block 32 ends, the rebound force of the torsion spring 31 drives the rotating block 30 and the pressing block 32 to reset and rotate. The elastic potential energy stored by the spring deformation is converted into kinetic energy when released, and the rotating plate can automatically return to the initial position without external power.

[0048] Reference Figure 10A limiting moving block 46 is fixedly connected to the bottom of the sliding block 16. A limiting slider 44 is fixedly connected to the inner bottom wall of the base 3 at the position corresponding to the limiting moving block 46. The other end of the limiting slider 44 is fixedly connected to one side of the first fixed seat 17. A limiting groove 45 is formed inside the limiting slider 44 at the position corresponding to the limiting moving block 46. The two sides of the limiting moving block 46 are slidably connected to the inner wall of the limiting groove 45. A ratchet 47 is fixedly connected to the bottom of the limiting moving block 46. A ratchet block 48 is fixedly connected to the limiting slider 44 at the position corresponding to the ratchet 47. A check pawl 49 is rotatably connected to one side of the ratchet block 48 via a torsion spring. An electric telescopic adjusting rod 50 is rotatably connected to one side of the check pawl 49. The other end of the electric telescopic adjusting rod 50 is rotatably connected to the top side of the check pawl 49. When the sliding block 16 drives the limiting moving block 46 to move within the limiting slide groove 45, the limiting moving block 46 drives the ratchet 47 to move. When the ratchet 47 moves, the check pawl 49 will slide at the teeth of the ratchet 47, thus limiting the ratchet 47. When the limiting moving block 46 moves to a certain position, it will be limited by the check pawl 49 to prevent displacement during laser welding.

[0049] Reference Figure 11 The adjusting seat 6 has a sliding groove 35 on one side corresponding to the mounting seat 10. One side of the mounting seat 10 is slidably engaged in the sliding groove 35. A connecting base plate 34 is fixedly connected to one side of the adjusting seat 6. A connecting top plate 33 is slidably engaged in the connecting base plate 34. One side of the top of the connecting top plate 33 is fixedly connected to one side of the lifting platform 7. When the adjusting seat 6 moves, the adjusting seat 6 simultaneously drives the connecting base plate 34 and the connecting top plate 33 to move. Then, the connecting top plate 33 drives the lifting platform 7 to move. The connecting top plate 33 can drive the lifting platform 7 to move while not hindering the lifting platform 7 from rising.

[0050] Reference Figure 12 The adjusting seat 6 has a buffer groove 36. Several sliding rods 37 are fixedly connected to the bottom of the buffer groove 36. The sliding rods 37 limit the limit block 38. When the connecting plate 40 drives the first spring telescopic rod 39 and the limit block 38 to rise at the same time, the sliding rods 37 limit the rise, so that the connecting plate 40 is always in a vertical rising state during the rising process.

[0051] A limiting block 38 is slidably connected to the surfaces of several sliding rods 37. Several first spring telescopic rods 39 are fixedly connected to one side of the limiting block 38. The other end of the several first spring telescopic rods 39 is fixedly connected to the same connecting plate 40. Several second spring telescopic rods 41 are fixedly connected to one side of the top of the connecting plate 40. A connecting groove 42 is opened at the bottom of the lifting platform 7 corresponding to the position of the second spring telescopic rods 41. The other end of the second spring telescopic rods 41 is fixedly connected to the inner wall of the connecting groove 42. The connecting plate 40 is slidably connected to the connecting groove 42 and the buffer groove 36. When the structural component is adjusting the weld width, the other side of the structural component will be squeezed against the connecting plate 40. Then, the connecting plate 40 squeezes the second spring telescopic rods 41 and the first spring telescopic rods 39 at the same time. The second spring telescopic rods 41 and the first spring telescopic rods 39 are used for buffering. At the same time, the structural component expands due to the high temperature of laser welding. The connecting plate 40 adjusts the clamping force of the second spring telescopic rods 41 in real time to avoid structural stress deformation or weld distortion caused by rigid clamping.

[0052] Reference Figure 12 The adjusting seat 6 is provided with an inclined surface, and several rollers 43 are rolled on the inclined surface to increase the rolling friction coefficient of the structural components on the inclined surface, reduce the conveying resistance, and at the same time avoid the workpiece from hard scraping against the inclined surface, thus protecting the precision surface.

[0053] Reference Figure 4 The clamping block 25 has a rubber material on one side for holding the material. The suction cup 20 and the placement platform 26 have a slightly convex design. The suction cup 20 has a slightly convex design, and its working plane is slightly higher than the reference plane of the placement platform 26. When the structural component is placed, the suction cup 20 is compressed under its own weight to generate a pre-pressure stroke. By actively enhancing the negative pressure of the sealed cavity, the adsorption force is dynamically strengthened to ensure that the structural component is stably adsorbed.

[0054] The working principle of this invention is as follows: First, the pressing and fixing block 32 is rotated, which drives the rotating block 30 to rotate within the mounting groove 29. When the rotating block 30 rotates, it simultaneously drives the torsion spring 31 to rotate and twist. At this time, one of the structural components can be placed under the pressing and fixing block 32. Then, the pressing and fixing block 32 can be released. The rebound force of the torsion spring 31 drives the rotating block 30 and the pressing and fixing block 32 to reset and rotate, thereby pressing and fixing one of the structural components with the pressing and fixing block 32, limiting and fixing one of the structural components. Then, the other structural component is placed tightly onto the placement platform 26. The component is held in place by the suction cup 20. The servo motor 4 drives the bidirectional threaded rod 5 to rotate. As the bidirectional threaded rod 5 rotates, the threaded moving blocks 21 on both sides move along with it. This movement of the bidirectional threaded rod 5 synchronously pulls and moves the connecting arm 22. The connecting arm 22, in turn, moves the clamping moving block 23 on one side onto the limiting plate 24, causing the clamping moving block 23 to move along with the clamping block 25, gradually approaching the structural component. The clamping block 25 clamps and fixes the structural component, causing the adjusting seat 6 and the lifting platform 7 to move closer to the structural component. When the structural component contacts the adjusting seat 6, the structural component... The component will slide on the inclined surface of the adjusting seat 6 until it contacts the lifting platform 7. The structural component will then push the lifting platform 7 upward, causing the lifting platform 7 to rise and simultaneously driving the telescopic block 8 and the lead screw 9 to move upward. When the lead screw 9 moves upward, it will drive the first bevel gear 11 to rise, causing the first bevel gear 11, the second bevel gear 13, and the rotating threaded rod 14 to rotate. The rotating threaded rod 14 then drives the sliding block 16, the connecting column 18, the linkage block 19, and the suction cup 20 to move. The suction cup 20 drives the structural component to move, creating a certain width between the two structural components. When the sliding block 16 moves, it simultaneously drives the limit movement. Block 46 moves within the limiting slide groove 45, and simultaneously the limiting moving block 46 drives the ratchet 47 to move. When the ratchet 47 moves, the check pawl 49 slides at the teeth of the ratchet 47, limiting the ratchet 47. When the limiting moving block 46 moves to a certain position, it will be limited by the check pawl 49. At this time, laser welding can be performed. During the laser welding process, the structural component expands and will squeeze the connecting plate 40. The connecting plate 40 then squeezes the second spring telescopic rod 41 and the first spring telescopic rod 39 simultaneously, using the second spring telescopic rod 41 and the first spring telescopic rod 39 for buffering.

[0055] Example 2, a second embodiment of the present invention, provides: a laser welding process for steel structure welding reinforcement, employing a laser welding device for steel structure welding reinforcement, comprising the following steps:

[0056] Step 1: Thoroughly clean the oil and rust stains in the welding area of ​​the welding table 2. Precisely process the bevel and workpiece according to the drawing. After cleaning, place the workpiece in the placement table 26 and clamp it with the clamping block 25 to fix the welding position.

[0057] Step 2: Set the laser power, speed, defocusing amount, and shielding gas flow rate according to the material thickness and joint type, calibrate the laser beam focus, introduce shielding gas, start the laser, and begin welding using ramp control;

[0058] Step 3: The laser head moves along the preset path to perform welding. It can selectively and precisely feed wire to fill the weld seam of thick plates, monitor the state of the molten pool and key parameters in real time, and dynamically fine-tune to ensure stable penetration and forming.

[0059] Step 4: When finishing the weld, use power and speed to descend at a ramp to fill the crater, keep the clamping block 25 clamped or apply local cooling measures to control the cooling rate of the workpiece to reduce deformation and stress.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser welding device for steel structure welding reinforcement, comprising a welding stand (1), characterized in that: The welding base (1) is fixedly connected to the top of the welding table (2), and the welding table (2) is fixedly connected to the center of the base (3). The base (3) is fixedly connected to one side of the interior of the base (3). The output end of the servo motor (4) is fixedly connected to the bidirectional threaded rod (5). The bidirectional threaded rod (5) is threadedly connected to the adjusting seat (6). The top of the adjusting seat (6) is movably provided with a lifting platform (7). Two symmetrically arranged telescopic blocks (8) are fixedly connected to one side of the lifting platform (7). The bottom of the telescopic block (8) is rotatably connected to a lead screw (9). The lead screw (9) is rotatably connected to a mounting seat (10) through a bearing. The other end of the mounting seat (10) is fixedly connected to the inner wall of the base (3). The lead screw (9) is threadedly connected to the rod wall near the bottom of the first bevel gear (11). The bottom of the first bevel gear (11) is rotatably connected to a mounting block (12) through a bearing. (12) is fixedly connected to the base (3) on one side. The first bevel gear (11) is meshed with the second bevel gear (13) on one side. The second bevel gear (13) is fixedly connected to the rotating threaded rod (14) on one side. The external thread of the rotating threaded rod (14) is threaded with a sliding block (16). The sliding block (16) is rotatably connected to the mounting base (15) near one end of the rotating threaded rod (14). The bottom of the mounting base (15) is fixedly connected to the bottom wall of the base (3). The other end of the rotating threaded rod (14) is rotatably connected to the first fixed seat (17). The bottom of the first fixed seat (17) is fixedly connected to the top of the base (3). The top of the sliding block (16) is fixedly connected to the connecting column (18). The top of the connecting column (18) is fixedly connected to the linkage block (19). The top of the linkage block (19) is fixedly connected to multiple suction cups (20). The bottom of the sliding block (16) is fixedly connected to a limiting moving block (46). The bottom wall of the base (3) is fixedly connected to a limiting slider (44) at the position corresponding to the limiting moving block (46). The other end of the limiting slider (44) is fixedly connected to one side of the first fixed seat (17). The inside of the limiting slider (44) is provided with a limiting groove (45) at the position corresponding to the limiting moving block (46). The two sides of the limiting moving block (46) are slidably connected to the inner wall of the limiting groove (45). The bottom of the limiting moving block (46) is fixedly connected to a ratchet (47). The position of the limiting slider (44) corresponding to the ratchet (47) is fixedly connected to a ratchet block (48). One side of the ratchet block (48) is rotatably connected to a check pawl (49) through a torsion spring. The side of the ratchet block (48) corresponding to the check pawl (49) is rotatably connected to an electric telescopic adjustment rod (50). The other end of the electric telescopic adjustment rod (50) is rotatably connected to the top side of the check pawl (49).

2. The laser welding device for steel structure welding reinforcement according to claim 1, characterized in that: The bidirectional threaded rod (5) has two threaded moving blocks (21) symmetrically threadedly connected. The bottom of the threaded moving block (21) is symmetrically connected to two connecting arms (22) by a pin. The other end of the connecting arm (22) is connected to a clamping moving block (23) by a pin. A limit plate (24) is slidably connected between the two clamping moving blocks (23). The two ends of the limit plate (24) are fixedly connected to the base (3). A clamping block (25) is fixedly connected to the top of the clamping moving block (23). A placement platform (26) is fixedly connected to the top of the base (3). A clamping groove (28) is opened on both sides of the placement platform (26) corresponding to the position of the clamping block (25). An adjustment groove (27) is opened on both sides of the placement platform (26) corresponding to the position of the suction cup (20).

3. The laser welding device for steel structure welding reinforcement according to claim 2, characterized in that: The placement platform (26) has an installation groove (29) on one side. A rotating block (30) is rotatably connected in the installation groove (29) via a pin. A pressing block (32) is fixedly connected to one side of the rotating block (30). Torsion springs (31) are respectively provided on the surfaces of both ends of the rotating block (30). One end of the torsion spring (31) is fixedly connected to the installation groove (29), and the other end of the torsion spring (31) is fixedly connected to the pressing block (32).

4. The laser welding device for steel structure welding reinforcement according to claim 1, characterized in that: The adjusting seat (6) has a sliding groove (35) on one side corresponding to the mounting seat (10). One side of the mounting seat (10) is slidably engaged in the sliding groove (35). One side of the adjusting seat (6) is fixedly connected to a connecting base plate (34). A connecting top plate (33) is slidably engaged in the connecting base plate (34). One side of the top of the connecting top plate (33) is fixedly connected to one side of the lifting platform (7).

5. The laser welding device for steel structure welding reinforcement according to claim 1, characterized in that: The adjusting seat (6) has a buffer groove (36) inside. Several sliding rods (37) are fixedly connected to the bottom of the buffer groove (36). Several sliding rods (37) are slidably connected to a limiting block (38) on their surfaces. Several first spring telescopic rods (39) are fixedly connected to one side of the limiting block (38). The other end of several first spring telescopic rods (39) is fixedly connected to the same connecting plate (40). Several second spring telescopic rods (41) are fixedly connected to one side of the top of the connecting plate (40). A connecting groove (42) is opened at the bottom of the lifting platform (7) corresponding to the position of the second spring telescopic rods (41). The other end of the second spring telescopic rods (41) is fixedly connected to the inner wall of the connecting groove (42). The connecting plate (40) is slidably connected to the connecting groove (42) and the buffer groove (36).

6. The laser welding device for steel structure welding reinforcement according to claim 1, characterized in that: The adjusting seat (6) is provided with an inclined surface, and several rollers (43) are rolled on the inclined surface.

7. The laser welding device for steel structure welding reinforcement according to claim 2, characterized in that: The clamping block (25) has a rubber material on one side for holding the material, and the suction cup (20) and the placement platform (26) have a slightly convex design.

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