Smoke removal device for laser welding

Abstract

The utility model relates to the technical field of laser welding, and discloses a smoke removal device for laser welding, which comprises a fixed pipe, the bottom of the fixed pipe is fixedly connected with a conical pipe, the bottom of the conical pipe is fixedly connected with a flow guide pipe, and the bottom of the flow guide pipe is fixedly connected with a smoke suction hood. The device comprises a flow guide pipe, a filtering assembly used for filtering smoke dust is arranged in the flow guide pipe, butt joint plates are fixedly connected to the front side and the rear side of the filtering assembly, clamping blocks are fixedly connected to the front side and the rear side of the exterior of the flow guide pipe, clamping plates are rotatably connected to the interiors of the two clamping blocks, and connecting rods are fixedly connected to the front sides of the two clamping plates. And the front sides of the two connecting rods are fixedly connected with cam discs. According to the filter assembly, the cam disc is rotated to enable the clamping plate to rotate, the sliding rod is extruded, the spring is compressed, after the cam disc is rotated by 90 degrees, the sliding rod is clamped into the clamping groove under the action of the spring, rapid installation is completed, the replacement efficiency of the filter assembly is greatly improved, and the equipment maintenance time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, and in particular to a smoke removal device for laser welding. Background Technology

[0002] Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Its principle involves a controlled high-frequency pulsed laser output from a pulsed laser, which is then focused onto the surface of the workpiece through optical fiber. This rapidly melts the materials being welded, forming a specific molten pool, which is then joined together upon cooling and solidification. Laser welding offers advantages such as high energy density, fast welding speed, small heat-affected zone, narrow and deep welds, high weld quality, and precise positioning, effectively reducing welding deformation and defects.

[0003] There are two main reasons for the generation of fumes during laser welding. Firstly, the highly concentrated laser energy causes the metal on the surface of the workpiece to melt and even vaporize rapidly. This metal vapor cools and condenses quickly in the air, forming metallic fumes. Secondly, the surface of the workpiece may contain oil, impurities, etc., which will undergo combustion and decomposition reactions under the laser's influence, producing various gaseous and solid smoke particles. The fumes generated by laser welding need to be removed promptly because they contain a large number of metal particles and harmful gases. Long-term inhalation can seriously damage the respiratory and cardiovascular systems of operators, leading to diseases such as pneumoconiosis. Furthermore, the fumes can permeate the welding area, interfering with laser transmission and focusing, affecting welding quality, and can also adhere to the equipment surface, accelerating equipment aging and reducing equipment performance and lifespan.

[0004] However, existing fume extraction devices for laser welding primarily rely on bolts and nuts for installation and fixation of their filter components. During installation, operators must prepare various tools such as wrenches and screwdrivers beforehand, align the bolts and nuts, and tighten them by rotating them repeatedly. This process requires intense concentration to ensure secure installation. Similarly, disassembly requires tools to unscrew the nuts one by one; even slight carelessness can lead to stripped nuts or damaged bolts. Because this process is entirely manual, it is time-consuming and requires significant manpower, resulting in substantial reduced efficiency and increased operating costs for businesses. Therefore, this paper proposes a new fume extraction device for laser welding to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fume extraction device for laser welding, which aims to improve the problem that some existing fume extraction devices for laser welding cannot achieve rapid installation and disassembly of filter components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fume extraction device for laser welding includes a fixed tube, a tapered tube fixedly connected to the bottom of the fixed tube, a guide tube fixedly connected to the bottom of the tapered tube, a fume hood fixedly connected to the bottom of the guide tube, a filter assembly for filtering fumes inside the guide tube, mating plates fixedly connected to the front and rear sides of the filter assembly, locking blocks fixedly connected to the front and rear sides of the guide tube, locking plates rotatably connected inside the locking blocks, connecting rods fixedly connected to the front sides of the locking plates, cam disks fixedly connected to the front sides of the connecting rods, fixing plates fixedly connected to the right sides of the mating plates, elastic components inside the fixing plates, two slots inside the cam disks, a fan fixedly connected to the top side inside the fixed tube, and arc-shaped grooves inside the locking blocks.

[0008] As a further description of the above technical solution:

[0009] The filter assembly includes an arc-shaped fan ring, the outside of which is slidably connected to the inside of the guide tube. A filter plate is fixedly connected to the left side of the arc-shaped fan ring, and an activated carbon plate is fixedly connected to the left side of the arc-shaped fan ring. Receiving grooves are provided on both the front and rear sides of the inside of the arc-shaped fan ring, and a handle is fixedly connected to the right side of the arc-shaped fan ring.

[0010] As a further description of the above technical solution:

[0011] Both of the elastic components include a sliding rod, the two sliding rods are slidably connected to the inside of the two fixed plates, the two sliding rods are each sleeved with a spring, a limit plate is fixedly connected to the adjacent side of the two sliding rods, and a movable plate is fixedly connected to the outside of the two sliding rods.

[0012] As a further description of the above technical solution:

[0013] A connecting plate is fixedly connected to the outside of the guide tube, multiple guide plates are fixedly connected to the outside of the tapered tube, a limit plate is slidably connected to the outside of the fixed tube, an mounting plate is fixedly connected to the rear side of the limit plate, a cylinder is installed at the bottom of the limit plate, a push rod is fixedly connected to the driving end of the cylinder, multiple guide rods are fixedly connected to the top of the connecting plate, and a limit plate is fixedly connected to the top of each of the multiple guide rods.

[0014] As a further description of the above technical solution:

[0015] The card plate is rotatably connected to the inside of the arc-shaped groove, and the card plate is slidably connected to the inside of the docking plate.

[0016] As a further description of the above technical solution:

[0017] One end of the spring is fixedly connected to the outside of the fixed plate, and the other end of the spring is fixedly connected to the outside of the movable plate.

[0018] As a further description of the above technical solution:

[0019] The sliding rod is externally slidably connected to the inside of the slot, and the limiting disk is externally slidably connected to the inside of the receiving slot;

[0020] As a further description of the above technical solution:

[0021] The guide plate is externally slidably connected to the inside of the limiting plate, and the guide rod is externally slidably connected to the inside of the limiting plate.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, when it is necessary to replace the filter plate and activated carbon plate, the sliding plate moves the sliding rod, compressing the spring and disengaging the sliding rod from the cam disc slot. The cam disc can then be rotated to align the locking plate with the notch on the locking block. Pulling the handle allows the arc-shaped fan ring to slide out of the guide tube, achieving quick disassembly. During installation, the operation is reversed: rotating the cam disc causes the locking plate to rotate, squeezing the sliding rod and compressing the spring. After the cam disc rotates 90 degrees, the sliding rod, under the action of the spring, engages with the slot, completing quick installation. This greatly improves the efficiency of filter component replacement and reduces equipment maintenance time.

[0024] 2. In this invention, the starting cylinder, via a push rod, displaces the connecting plate, thereby causing the conical tube, guide tube, and fume hood connected to the connecting plate to shift. The guide plate slides within the limiting plate, providing guidance for the movement of the conical tube and guide tube; the guide rod, fixed to the top of the connecting plate, also slides within the limiting plate, providing guidance for the movement of the connecting plate. The limiting plate not only restricts the movement range of the conical tube and guide tube but also provides a mounting base for components such as the mounting plate and cylinder. This height-adjustable structure can adapt to the required fume extraction height under different welding conditions, effectively ensuring the fume extraction effect. Attached Figure Description

[0025] Figure 1 This is a perspective view of a smoke removal device for laser welding proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the conical tube structure of a smoke removal device for laser welding proposed in this utility model;

[0027] Figure 3This is a schematic diagram of the fume hood structure of a laser welding fume removal device proposed in this utility model;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 This is a schematic diagram of the block structure of a smoke removal device for laser welding proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the connecting plate structure of a smoke removal device for laser welding proposed in this utility model.

[0031] Legend:

[0032] 1. Fixed tube; 2. Conical tube; 3. Guide tube; 4. Fume hood; 5. Arc-shaped fan ring; 6. Filter plate; 7. Activated carbon plate; 8. Connecting plate; 9. Connecting rod; 10. Cam plate; 11. Clamping plate; 12. Clamping block; 13. Fixed plate; 14. Sliding rod; 15. Spring; 16. Limiting plate one; 17. Moving plate; 18. Receiving groove; 19. Slot; 20. Hand handle; 21. Connecting plate; 22. Guide plate; 23. Limiting plate; 24. Fan; 25. Mounting plate; 26. Cylinder; 27. Push rod; 28. Guide rod; 29. ​​Limiting plate two; 30. Arc-shaped groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 2 to 4This utility model provides an embodiment of a fume extraction device for laser welding, comprising a fixed tube 1, the interior of which is hollow, providing a channel for conveying fumes. A tapered tube 2 is fixedly connected to the bottom of the fixed tube 1, the tapered tube 2 facilitating the flow of fumes, allowing fumes drawn in from below to enter the fixed tube 1 more concentratedly. A guide tube 3 is fixedly connected to the bottom of the tapered tube 2, the main function of which is to stably convey fumes drawn in from the fume extraction hood 4 into the tapered tube 2. A fume hood 4 is fixedly connected to the bottom of the guide pipe 3. A filter assembly for filtering smoke and dust is installed inside the guide pipe 3. A docking plate 8 is fixedly connected to both the front and rear sides of the filter assembly. Locking blocks 12 are fixedly connected to both the front and rear sides of the guide pipe 3. A locking plate 11 is rotatably connected inside each of the two locking blocks 12. The locking plate 11 functions to lock and unlock the filter assembly during operation. When the locking plate 11 rotates to a specific position, it can firmly fix the filter assembly inside the guide pipe 3. When the filter assembly needs to be replaced, the locking plate 11 is rotated to align with the notch of the locking block 12, and the filter assembly can be removed. The external side of the locking plate 11 is slidably connected to the inside of the docking plate 8. A connecting rod 9 is fixedly connected to the front side of each of the two locking plates 11, and a cam disc 10 is fixedly connected to the front side of each of the two connecting rods 9.

[0035] When the cam disk 10 rotates, it drives the locking plate 11 to rotate via the connecting rod 9, thereby locking and unlocking the filter assembly. A fixing plate 13 is fixedly connected to the right side of each of the two docking plates 8. Each fixing plate 13 contains an elastic component. Two slots 19 are formed inside each of the two cam disks 10. The sliding rod 14 is externally slidably connected to the inside of the slots 19. A fan 24 is fixedly connected to the top inside of the fixing tube 1, serving as the power source for generating suction. An arc-shaped groove 30 is formed inside each of the two locking blocks 12. The external of the locking plate 11 is rotatably connected to the inside of the arc-shaped groove 30. The arc-shaped groove 30 provides a trajectory for the rotation of the locking plate 11, ensuring that the locking plate 11 accurately aligns with the notch of the locking block 12 during rotation, thus enabling the locking and unlocking of the filter assembly.

[0036] Reference Figure 2 , Figure 3 and Figure 5The filter assembly includes an arc-shaped fan ring 5, which is externally slidably connected to the inside of the guide tube 3. The arc-shaped fan ring 5 can slide smoothly within the guide tube 3, facilitating the replacement of the filter plate 6 and activated carbon plate 7. A filter plate 6 is fixedly connected to the left side of the arc-shaped fan ring 5. The filter plate 6 uses special filter materials, such as fiber mesh, to effectively filter large particulate impurities in the smoke. An activated carbon plate 7 is also fixedly connected to the left side of the arc-shaped fan ring 5. The activated carbon plate 7 utilizes the adsorption properties of activated carbon to adsorb harmful gases and fine particles in the smoke filtered by the filter plate 6, further purifying the air. Receiving grooves 18 are provided on both the front and rear sides of the arc-shaped fan ring 5. A limiting disc 16 is externally slidably connected to the inside of the receiving groove 18, which accommodates the limiting disc 16 and provides space for its sliding.

[0037] A handle 20 is fixedly connected to the right side of the arc-shaped fan ring 5, which allows the operator to grip and pull the arc-shaped fan ring 5 when replacing the filter assembly. Both elastic components include sliding rods 14, which are slidably connected to the interiors of two fixed plates 13. Under the action of springs 15, the sliding rods 14 can slide freely within the fixed plates 13, locking and unlocking the rotational position of the cam disc 10. Springs 15 are fitted around the exterior of both sliding rods 14. One end of the spring 15 is fixedly connected to the exterior of the fixed plate 13, and the other end is fixedly connected to the exterior of the moving plate 17. During operation, the springs 15 provide elasticity. When the sliding rod 14 is subjected to external force, the springs 15 are compressed or extended, storing or releasing energy to ensure that the sliding rod 14 accurately engages with the slot 19 of the cam disc 10. Limiting disks 16 are fixedly connected to the adjacent sides of the two sliding rods 14. Movable plates 17 are fixedly connected to the outside of the two sliding rods 14. The function of the movable plates 17 is to facilitate the operator to control the movement of the sliding rods 14 by pulling or pushing the movable plates 17, thereby realizing the adjustment of the rotation position of the cam disk 10.

[0038] Reference Figure 1 , Figure 2 and Figure 6The external connection of the guide tube 3 is a connecting plate 21, and the external connection of the tapered tube 2 is a plurality of guide plates 22. The function of the guide plates 22 is to guide the movement of the tapered tube 2 and the guide tube 3 when adjusting the height of the fume hood 4, ensuring that they can move smoothly in the predetermined direction and improving the accuracy and stability of the adjustment. The external connection of the fixed tube 1 is a limiting plate 23, which limits the range of movement of the tapered tube 2 and the guide tube 3. The external connection of the guide plate 22 is slidably connected to the inside of the limiting plate 23. The rear side of the limiting plate 23 is fixedly connected to a mounting plate 25. The device is fixed to the worktable on the mounting plate 25 by bolts or other connecting parts to ensure the stability of the device during operation. A cylinder 26 is installed at the bottom of the limiting plate 23. A push rod 27 is fixedly connected to the drive end of the cylinder 26. The cylinder 26 serves as a power source. By controlling the extension and retraction of the cylinder 26, the push rod 27 is displaced, thereby realizing the adjustment of the height of the fume hood 4. Multiple guide rods 28 are fixedly connected to the top of the connecting plate 21. The outer surfaces of the guide rods 28 are slidably connected to the inside of the limiting plate 23. When adjusting the height of the fume hood 4, the guide rods 28 provide guidance for the movement of the connecting plate 21, ensuring that the connecting plate 21 can move smoothly along the predetermined direction, thereby improving the accuracy and stability of the adjustment. Limiting discs 29 are fixedly connected to the tops of the multiple guide rods 28. The limiting discs 29 restrict the range of movement of the guide rods 28, preventing them from dislodging from the limiting plate 23.

[0039] Working principle: When using this laser welding fume removal device, first install the device above the welding worktable using the mounting plate 25. Then, start the cylinder 26 to drive the push rod 27 to move, which in turn causes the connecting plate 21 to move. This causes the conical tube 2, the guide tube 3, and the fume hood 4 to move, allowing the guide plate 22 and the conical tube 2 to slide inside the limiting plate 23. This allows for adjustment of the height of the fume hood 4, adapting to the fume removal height required for different welding conditions and ensuring the fume removal effect. During fume removal, the fan 24 generates suction to draw the smoke and dust from the area covered by the fume hood 4 into the interior of the fume hood 4. The smoke and dust are then transported through the guide tube 3 to the interior of the conical tube 2 and the fixed tube 1 and finally discharged. The smoke and dust are effectively filtered by the filter plate 6 and the activated carbon plate 7.

[0040] When the filter plate 6 and activated carbon plate 7 need to be replaced, the sliding plate 17 can drive the sliding rod 14 to move, thereby compressing the spring 15. This causes the outer surface of the sliding rod 14 to disengage from the inside of the cam disk 10. At this time, the cam disk 10 can be rotated to drive the connecting rod 9 to rotate, thereby causing the clamping plate 11 to rotate. This will align the clamping plate 11 with the notch of the clamping block 12. Then, by pulling the handle 20, the arc-shaped fan ring 5 can be slid out from the inside of the guide tube 3, thereby allowing the filter plate 6 and activated carbon plate 7 to be replaced. When it is necessary to install the filter plate 6 and the activated carbon plate 7, the clamping plate 11 can be aligned with the notch of the clamping block 12, and then aligned inward. Then, the cam disk 10 can be rotated to drive the clamping plate 11 to rotate inside the arc groove 30. At this time, the cam disk 10 will press the sliding rod 14 to move, which will cause the spring 15 to be compressed. When the cam disk 10 rotates ninety degrees, the sliding rod 14 will rebound under the action of the spring 15, and then it can be locked into the inside of the clamping groove 19, thereby realizing the installation of the filter plate 6 and the activated carbon plate 7.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smoke extraction device for laser welding comprising a stationary tube (1), characterized in that: The bottom of the fixed pipe (1) is fixedly connected with a conical pipe (2), the bottom of the conical pipe (2) is fixedly connected with a flow guide pipe (3), the bottom of the flow guide pipe (3) is fixedly connected with a smoke cover (4), the inside of the flow guide pipe (3) is provided with a filter assembly for filtering smoke dust, the front and rear sides of the filter assembly are fixedly connected with butt plates (8), the outside front and rear sides of the flow guide pipe (3) are fixedly connected with clamping blocks (12), the inside of the two clamping blocks (12) are rotatably connected with clamping plates (11), the front sides of the two clamping plates (11) are fixedly connected with connecting rods (9), the front sides of the two connecting rods (9) are fixedly connected with cam plates (10), the right sides of the two butt plates (8) are fixedly connected with fixed plates (13), the inside of the two fixed plates (13) are provided with elastic assemblies, the inside of the two cam plates (10) are provided with two clamping grooves (19), the inside top side of the fixed pipe (1) is fixedly connected with a fan (24), the inside of the two clamping blocks (12) are provided with arc-shaped grooves (30).

2. The smoke removing device for laser welding according to claim 1, characterized in that: The filter assembly comprises an arc-shaped fan ring (5), the outside of the arc-shaped fan ring (5) is slidably connected in the inside of the flow guide pipe (3), the left side of the arc-shaped fan ring (5) is fixedly connected with a filter plate (6), the left side of the arc-shaped fan ring (5) is fixedly connected with an activated carbon plate (7), the front and rear sides of the inside of the arc-shaped fan ring (5) are provided with accommodating grooves (18), and the right side of the arc-shaped fan ring (5) is fixedly connected with a handheld handle (20).

3. The smoke removal device for laser welding according to claim 2, characterized in that: The two elastic assemblies each comprise a sliding rod (14), the outside of the two sliding rods (14) is slidably connected in the inside of the two fixed plates (13), the outside of the two sliding rods (14) is sleeved with a spring (15), the side close to the two sliding rods (14) is fixedly connected with a limiting disc I (16), and the outside of the two sliding rods (14) is fixedly connected with a moving plate (17).

4. The smoke removal device for laser welding according to claim 1, characterized in that: The outside of the flow guide pipe (3) is fixedly connected with a connecting plate (21), the outside of the conical pipe (2) is fixedly connected with a plurality of guide plates (22), the outside of the fixed pipe (1) is slidably connected with a limiting plate (23), the rear side of the limiting plate (23) is fixedly connected with a mounting plate (25), the bottom of the limiting plate (23) is provided with an air cylinder (26), the driving end of the air cylinder (26) is fixedly connected with a push rod (27), the top of the connecting plate (21) is fixedly connected with a plurality of guide rods (28), and the top of the plurality of guide rods (28) is fixedly connected with a limiting disc II (29).

5. The smoke removal device for laser welding according to claim 1, characterized in that: The outside of the clamping plate (11) is rotatably connected in the inside of the arc-shaped groove (30), and the outside of the clamping plate (11) is slidably connected in the inside of the butt plate (8).

6. The smoke removal device for laser welding according to claim 3, characterized in that: One end of the spring (15) is fixedly connected to the outside of the fixed plate (13), and the other end of the spring (15) is fixedly connected to the outside of the moving plate (17).

7. The smoke removal device for laser welding according to claim 3, characterized in that: The outer part of the sliding rod (14) is connected with the inner part of the clamping groove (19), and the outer part of the limiting disc (16) is connected with the inner part of the accommodating groove (18).

8. The smoke removal device for laser welding according to claim 4, characterized in that: The outer part of the guide plate (22) is connected with the inner part of the limiting plate (23), and the outer part of the guide rod (28) is connected with the inner part of the limiting plate (23).

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