A welding dust removal device

Abstract

This invention provides a welding dust removal device, comprising a negative pressure dust removal pipe and an electrode plate. A welding dust removal assembly is disposed between the negative pressure dust removal pipe and the electrode plate, comprising a welding head and a dust removal head. The welding head has an outflow channel and a protective gas connector. The welding head and the dust removal head are connected to form a guide cavity. This invention introduces protective gas into the guide cavity through the protective gas connector, allowing the protective gas to flow towards the electrode plate. The protective gas provides welding protection and, under the influence of gas pressure, due to the obstruction of the electrode plate and the negative pressure of the negative pressure dust removal pipe, forces the protective gas to flow upward through the outflow channel. Simultaneously, the protective gas carries welding slag into the negative pressure dust removal pipe and discharges the slag, improving dust removal efficiency. This invention has a simple structure, requiring only maintenance of the welding head and the dust removal head, eliminating the need for bearings and extending service life.

Description

Technical Field

[0001] This utility model relates to the field of battery pack manufacturing technology, specifically to a welding dust removal device. Background Technology

[0002] In the production of battery packs, electrode welding generally adopts the direct-flow dust removal method, that is, the protective gas flows perpendicular to the direction of the laser beam. This results in the protective gas only forming a cloud of gas with no stable flow direction above the welding area, which cannot effectively carry away the heavier welding slag in the welding area, while the lighter welding slag is blown everywhere, thus increasing the cost of dust control.

[0003] Chinese invention patent document CN118720553A discloses a welding module and welding equipment, which removes fumes and welding slag generated during the welding process through a base, bearings, centrifugal impeller, welding head, dust removal exhaust port and air blowing pipe connector. However, the equipment has a complex structure, high maintenance costs, and the bearings are easily affected by welding slag, resulting in a short service life. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to provide a welding dust removal device with a simple structure and improved service life.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] This utility model provides a welding dust removal device, which includes a negative pressure dust removal pipe and an electrode plate. A welding dust removal assembly is arranged between the negative pressure dust removal pipe and the electrode plate, which includes a welding head and a dust removal head. The welding head is provided with an outflow channel and a protective gas connector. The welding head and the dust removal head are connected to form a guide cavity.

[0007] Beneficial effects: This utility model introduces protective gas into the guide cavity through a protective gas connector, allowing the protective gas to flow towards the electrode. On the one hand, the protective gas provides welding protection; on the other hand, under the action of gas pressure, due to the obstruction of the electrode and the negative pressure of the negative pressure dust removal pipe, the protective gas flows upward through the outflow channel. At the same time as flowing out, the protective gas carries the welding slag into the negative pressure dust removal pipe and discharges the welding slag through the negative pressure dust removal pipe, thereby improving dust removal efficiency. This utility model has a simple structure, requiring only maintenance of the welding head and the dust removal head, eliminating the need for bearings and extending service life.

[0008] Preferably, the top of the welding head is a hollow rectangle, and an airflow groove is provided on the side of the rectangle. One end of the airflow groove is connected to the protective gas connector, and the other end is connected to the guide cavity.

[0009] Preferably, the shape of the dust removal pressure head is the same as that of the welding pressure head. The hollow rectangle of the welding pressure head is provided with threaded holes around its perimeter. The top surface of the dust removal pressure head and the bottom surface of the hollow rectangle of the welding pressure head are fixed by screws screwed into the threaded holes.

[0010] Preferably, the welding head extends downward from the top center into a cone shape. The cone shape has a hollow structure, and its inner diameter gradually decreases from top to bottom. The hollow structure serves as the outflow channel.

[0011] Preferably, the dust removal head is provided with a second cone, the first cone is fitted inside the second cone, and the gap between the first cone and the second cone is a flow guide cavity.

[0012] Preferably, a guide vane is provided inside the second cone, and the guide vane is in contact with the first cone.

[0013] Preferably, the guide vane has a torsion angle, and the degree of bending varies from top to bottom, with the torsion angle being 20-30 degrees.

[0014] Beneficial effects: The protective gas enters the airflow channel through the protective gas connector. Under the gas pressure, the protective gas flows into the guide cavity of the airflow channel. It is subjected to the radial force of the guide plate, which gives the protective gas rotational momentum, thereby carrying the welding slag to the outflow channel and improving the dust removal effect.

[0015] Preferably, the negative pressure dust removal pipe is connected to the dust removal equipment.

[0016] Preferably, the welding dust removal device further includes a fiber laser, which is positioned directly above the welding head, and the negative pressure dust removal pipe is positioned to the side of the fiber laser.

[0017] Preferably, the electrode is positioned directly below the dust removal pressure head, and the electrode is placed on top of the battery cell to be welded.

[0018] The advantages of this utility model are:

[0019] In this invention, during electrode welding, the welding head presses down on the electrode and the electrode post of the battery cell to be welded. The protective gas passes through the protective gas connector, sequentially through the airflow groove and the guide cavity. Under the action of gas pressure, it flows downward in a spiral shape along the guide plate with a torsional angle. The protective gas forms a vortex on the surface of the electrode. The fiber laser welds the electrode and the battery cell to be welded using laser, and the protective gas plays a protective role. Then, under the negative pressure of the negative pressure dust removal pipe and the obstruction of the electrode, the protective gas carries the welding slag and flows upward in a spiral shape through the outflow channel to the negative pressure dust removal pipe. The welding slag is then discharged through the dust removal equipment, improving the dust removal efficiency. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the welding dust removal device in the embodiment;

[0021] Figure 2 This is a cross-sectional view of the welding dust removal device in the embodiment;

[0022] Figure 3 This is a structural diagram of the welding pressure head in the embodiment;

[0023] Figure 4 This is a structural diagram of the dust removal head in the embodiment;

[0024] Figure 5 This is a structural diagram showing the airflow direction in the embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] according to Figure 1-2As shown, this embodiment provides a welding dust removal device, which includes a fiber laser 10. A negative pressure dust removal pipe 20 is arranged on the side of the fiber laser 10 and is connected to a dust removal device. A welding dust removal assembly is arranged directly below the fiber laser 10, which includes a welding pressure head 30 and a dust removal pressure head 50. The welding pressure head 30 is provided with an outflow channel 35 and a protective gas connector 40. The welding pressure head 30 is connected to the dust removal pressure head 50 to form a guide cavity 53. An electrode 70 and a battery cell 80 to be welded are arranged directly below the dust removal pressure head 50. The electrode 70 is placed on top of the battery cell 80 to be welded.

[0028] like Figure 3 As shown, the top of the welding head 30 is a hollow rectangle (not shown in the figure), and an airflow groove 31 is provided on the side of the hollow rectangle. In this embodiment, two airflow grooves 31 are staggered on opposite sides of the hollow rectangle. One end of the two airflow grooves 31 is connected to the protective gas connector 40. Threaded holes 34 are provided around the hollow rectangle.

[0029] The welding head 30 extends downward from the top center to form a first cone 33. The first cone 33 is a hollow structure with its inner diameter gradually decreasing from top to bottom. The hollow structure is the outflow channel 35.

[0030] like Figure 4 As shown, the shape of the dust removal head 50 is the same as that of the welding head 30. Therefore, the top of the dust removal head 50 is a hollow rectangle (not shown in the figure). Threaded holes 34 are provided around the hollow rectangle. A second cone (not shown in the figure) extends downward from the center of the hollow rectangle. The second cone has a hollow structure, and its inner diameter gradually decreases from top to bottom. However, the inner diameter of the second cone is slightly larger than that of the first cone 33. Its function is to form a gap between the first cone 33 and the second cone, which is the guide cavity 53.

[0031] The second cone has a guide plate 52 inside, which is attached to the first cone 33. The guide plate 52 has a torsion angle of 30 degrees, and the degree of curvature is different from top to bottom, which allows the protective gas to flow downward spirally along the guide plate 52, forming a vortex on the surface of the electrode, which can carry away the welding slag.

[0032] like Figure 5As shown, the hollow rectangular bottom surface of the welding head 30 is superimposed on the hollow rectangular top surface of the dust removal head 50, and fixed by screwing the screw 60 into the threaded hole 34. At this time, the airflow groove 31 is connected to the formed guide cavity 53. The protective gas passes through the protective gas connector 40 through the airflow groove 31 and the guide cavity 53 in sequence. Under the action of gas pressure, it spirals downward along the guide plate 52 with a torsional angle, forming a vortex on the surface of the electrode plate 70. Then, under the action of the negative pressure of the negative pressure dust removal pipe 20 and the obstruction of the electrode plate 70, the protective gas carries the welding slag and spirals upward through the outflow channel 35. Finally, it is sucked into the negative pressure dust removal 20 and discharged through the dust removal equipment, thereby improving the dust removal efficiency.

[0033] The working principle of the welding dust removal device in this embodiment is as follows:

[0034] In this invention, during electrode welding, the welding head 30 presses down on the electrode and the electrode post of the cell 80 to be welded. Shielding gas passes through the shielding gas connector 40, sequentially through the airflow groove 31 and the guide cavity 53. Under the action of gas pressure, it flows downwards in a spiral shape along the guide plate 52 with a twisting angle. The shielding gas forms a vortex on the surface of the electrode 70. The fiber laser 10 welds the electrode 70 and the cell 80 to be welded using laser light, with the shielding gas providing protection. Then, under the negative pressure of the negative pressure dust removal pipe 20 and the obstruction of the electrode 70, the shielding gas, carrying welding slag, flows upwards in a spiral shape through the outlet channel 35 to the negative pressure dust removal pipe 20, where the welding slag is discharged through the dust removal equipment, improving dust removal efficiency. This invention has a simple structure, requiring only maintenance of the welding head and the dust removal head, eliminating the need for bearings and resulting in a long service life.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A welding dust removal device, comprising a negative pressure dust removal pipe (20) and an electrode plate (70), characterized in that, A welding dust removal assembly is provided between the negative pressure dust removal pipe (20) and the electrode (70), which includes a welding head (30) and a dust removal head (50). The welding head (30) is provided with an outflow channel (35) and a protective gas connector (40). The welding head (30) is connected to the dust removal head (50) to form a guide cavity (53).

2. The welding dust removal device according to claim 1, characterized in that, The top of the welding head (30) is a hollow rectangle, and an airflow groove (31) is provided on the side of the hollow rectangle. One end of the airflow groove (31) is connected to the protective gas connector (40), and the other end is connected to the guide cavity (53).

3. The welding dust removal device according to claim 2, characterized in that, The shape of the dust removal pressure head (50) is the same as that of the welding pressure head (30). The hollow rectangles of the welding pressure head (30) and the dust removal pressure head (50) are provided with threaded holes (34) around them. The top surface of the dust removal pressure head (50) and the bottom surface of the hollow rectangle of the welding pressure head (30) are fixed by screws (60) screwed into the threaded holes (34).

4. The welding dust removal device according to claim 2, characterized in that, The welding head (30) extends downward from the top center and is configured as a first cone (33). The first cone (33) is a hollow structure with its inner diameter gradually decreasing from top to bottom. The hollow structure is the outflow channel (35).

5. The welding dust removal device according to claim 4, characterized in that, The dust removal head (50) is provided with a second cone, and the gap formed by the first cone (33) inside the second cone is the guide cavity (53).

6. The welding dust removal device according to claim 5, characterized in that, A guide vane (52) is provided inside the second cone, and the guide vane (52) is in contact with the first cone (33).

7. The welding dust removal device according to claim 6, characterized in that, The guide vane (52) has a torsion angle, and the degree of bending varies from top to bottom. The torsion angle is 20-30 degrees.

8. The welding dust removal device according to claim 1, characterized in that, The negative pressure dust removal pipe (20) is connected to the dust removal equipment.

9. The welding dust removal device according to claim 1, characterized in that, The welding dust removal device also includes a fiber laser (10), which is located directly above the welding head (30), and the negative pressure dust removal pipe (20) is located on the side of the fiber laser (10).

10. The welding dust removal device according to claim 1, characterized in that, The electrode (70) is positioned directly below the dust removal head (50) and is placed on top of the battery cell (80) to be welded.

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