Dust removal protection mechanism and laser welding device
By using side plate nozzles and exhaust ports to create cross airflow in the laser welding device, the problem of protective gas blowing away welding slag is solved, thus improving welding quality and product yield.
Patent Information
- Application Number
- CN202423097445.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In existing laser welding processes, the gas flow of the shielding gas can easily blow weld slag or contaminants onto the weld, leading to welding defects such as bursts, porosity, and collapse, thus reducing product yield.
A dust removal and protection mechanism is adopted, which uses nozzles on the side plate to blow out protective gas and extracts the fumes through the air extraction port to form a cross airflow, avoiding the airflow from blowing directly onto the weld. A negative pressure source is used to extract the fumes in the welding space.
It effectively reduces the risk of welding slag and contaminants being blown onto the weld, reduces defects such as bursts, porosity, and collapse, and improves welding quality and product yield.
Smart Images
Figure CN223734089U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of welding equipment, in particular to a dust removal protection mechanism and a laser welding device. BACKGROUND
[0002] In the laser welding process, for example, the battery weld is continuously welded around by the laser head, and the oxygen in the welding area is discharged by using the protective gas (such as nitrogen) in the welding process to prevent the weld from oxidizing, which can significantly improve the weld quality, improve the welding performance, and improve the appearance of the welding surface.
[0003] In the prior art, the copper nozzle of the laser head is used to supply laser and blow out protective gas, that is, a coaxial gas blowing mode is adopted. The coaxial gas blowing mode has the problem that the gas flow of the protective gas easily blows welding slag or dirt onto the weld, especially when welding a blade battery, which further causes welding defects such as blowholes, pores, and collapse, thereby greatly reducing the product yield. CONTENT OF THE UTILITY MODEL
[0004] Therefore, it is necessary to provide a dust removal protection mechanism and a laser welding device which can avoid the gas flow of the protective gas from blowing welding slag or dirt onto the weld, reduce the risk of welding defects such as blowholes, pores, and collapse, and thereby improve the product yield.
[0005] A dust removal protection mechanism comprises:
[0006] A dust cover comprises a top plate and a side plate connected to one side of the top plate, the top plate has a mounting hole, and the side plate is arranged around the mounting hole to form a welding space with the top plate; the mounting hole on the top plate is used for the welding head to pass into the welding space; and
[0007] A nozzle is installed on the side plate and used for blowing protective gas into the welding space.
[0008] The side plate further has a gas suction port connected to an external negative pressure source, and the gas suction port is used for discharging smoke in the welding space.
[0009] In some embodiments, the nozzle and the gas suction port are provided in multiple numbers, each nozzle corresponds to each gas suction port, each nozzle blows protective gas towards the corresponding gas suction port, and the blowing directions of at least two nozzles intersect.
[0010] In some embodiments, the side plate is provided in multiple numbers, and multiple side plates and the top plate jointly enclose the welding space.
[0011] One of the two side plates is provided with the nozzle, and the other side plate is provided with the suction port.
[0012] In some embodiments, the nozzle and the suction port are both provided in two, the two nozzles are a first nozzle and a second nozzle respectively, and the two suction ports are a first suction port and a second suction port respectively. The first nozzle and the first suction port are arranged opposite to each other in a first preset direction, the first nozzle blows the shielding gas to the first suction port along the first preset direction, the second nozzle and the second suction port are arranged opposite to each other in a second preset direction, and the second nozzle blows the shielding gas to the second suction port along the second preset direction. The first preset direction intersects the second preset direction.
[0013] In some embodiments, the first nozzle and the first suction port are respectively located on both sides of the welding head in the first preset direction, and the second nozzle and the second suction port are respectively located on both sides of the welding head in the second preset direction.
[0014] In some embodiments, the side plates are provided in a plurality, and the plurality of side plates and the top plate jointly enclose the welding space. Each of the side plates includes a first side plate and a second side plate arranged opposite to each other in the first preset direction, and a third side plate and a fourth side plate arranged opposite to each other in the second preset direction.
[0015] The first nozzle is installed on the first side plate, the first suction port is provided on the second side plate, the second nozzle is installed on the third side plate, and the second suction port is provided on the fourth side plate.
[0016] In some embodiments, a connector is installed at the suction port of the side plate, and the connector is used to communicate with an external negative pressure source through a pipeline.
[0017] In some embodiments, the side plate is further provided with a through hole, the nozzle is arranged through the through hole, and the nozzle is fixedly connected with the side plate through a locking member.
[0018] In some embodiments, the cross-sectional shape of the dust cover is rhombic.
[0019] A laser welding device, characterized in that it comprises a welding mechanism and a dust removal and protection mechanism as described in any one of the above embodiments. The welding mechanism comprises a mechanism body and a welding head installed at one end of the mechanism body. The top plate is sleeved on one end of the mechanism body with the welding head 13, so that the welding head is located in the welding space.
[0020] In some embodiments, the welding head is a copper nozzle.
[0021] The dust protection mechanism and the laser welding device, when welding the product, the mechanism main body generates laser, the laser passes through the welding head and irradiates on the product, and the product is laser welded. During the welding process, the nozzle blows protective gas to the welding space, so as to exclude the air in the welding space and avoid the oxidation of the weld. At the same time, the gas suction port on the side plate sucks the smoke in the welding space under the action of negative pressure, avoiding the overflow of the welding smoke to the external environment. Compared with the coaxial gas blowing scheme in the prior art, the nozzle on the side plate is used for blowing gas in the embodiment, that is, the coaxial gas blowing is changed to side blowing, and the blown protective gas forms an airflow towards the gas suction port, thereby greatly reducing the risk of blowing dust such as welding slag and dirt onto the weld, and further reducing the risk of welding defects such as blowhole, porosity and collapse, so as to improve the product yield. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is a front view of the laser welding device in an embodiment of the present application;
[0023] Figure 2 It is a front view of the laser welding device in an embodiment of the present application; Figure 1 It is a side view of the laser welding device shown in the figure;
[0024] Figure 3 It is a bottom view of the laser welding device shown in the figure. Figure 1 It is a bottom view of the laser welding device shown in the figure. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.
[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.
[0027] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0030] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not the only embodiment.
[0031] Please refer to Figures 1 to 3 The present application provides a laser welding device, which comprises a welding mechanism 10 and a dust protection mechanism 20. The welding mechanism 10 is used to generate laser and control the laser to irradiate on the product, so as to weld the product. The dust protection mechanism 20 is used to blow protective gas to the welding area to exclude oxygen in the welding area and prevent the weld from being oxidized. A large amount of smoke will be generated in the process of laser welding. The dust protection mechanism 20 is also used to extract the smoke in the welding area to avoid the smoke in the welding area from overflowing to the external environment.
[0032] In the embodiment of the present application, the dust removal protection mechanism 20 comprises a dust cover 22 and a nozzle 27. The dust cover 22 comprises a top plate 21 and a side plate 23 fixedly connected to one side of the top plate 21. The top plate 21 is provided with a mounting hole 211 (see Figure 3 ), and the side plate 23 is arranged around the mounting hole 211 on the top plate 21 to form a welding space 25 together with the top plate 21. The welding mechanism 10 comprises a mechanism body 11 and a welding head 13 mounted on one end of the mechanism body 11. The top plate 21 is sleeved on the end of the mechanism body 11 where the welding head 13 is mounted through the mounting hole 211 on the top plate 21, so that the welding head 13 is located in the welding space 25. The mechanism body 11 is used to emit laser to the welding head 13, and the welding head 13 is used to focus the laser emitted by the mechanism body 11 so that the laser irradiates the product and performs laser welding on the product. The nozzle 27 is mounted on the side plate 23 and is used to blow protective gas into the welding space 25. The side plate 23 is also provided with a gas suction port 28 for connecting to an external negative pressure source, which is used to exhaust the smoke in the welding space 25, thereby avoiding the smoke in the welding space 25 from overflowing to the external environment.
[0033] The above laser welding device, when welding the product, the mechanism body 11 generates laser which irradiates the product through the welding head 13 and performs laser welding on the product. During the welding process, the nozzle 27 blows protective gas into the welding space 25, thereby excluding air in the welding space 25 and avoiding the weld from being oxidized. At the same time, the gas suction port 28 on the side plate 23 extracts the smoke in the welding space 25 under the action of negative pressure, thereby avoiding the smoke generated by welding from overflowing to the external environment. Compared with the coaxial gas blowing scheme in the prior art, the nozzle 27 in the embodiment blows gas from the side plate 23, i.e. from coaxial gas blowing to side gas blowing, and the protective gas blown forms a gas flow towards the gas suction port 28, thereby greatly reducing the risk of blowing dust such as welding slag and dirt onto the weld, and further reducing the risk of welding defects such as blowholes, pores and collapse, thereby achieving the purpose of improving product yield.
[0034] It should be noted that the prior art adopts coaxial gas blowing, i.e. the blowing direction of the protective gas is the same as the direction of the laser emission, so that the gas flow formed by the protective gas can directly blow to the weld. If the blowing power is too large, the molten solder at the welding position will splash, which will adversely affect the appearance and welding quality of the weld surface. Unlike the prior art, the nozzle 27 in the present application is mounted on the side plate 23 of the dust cover 22, i.e. from coaxial gas blowing to side gas blowing, so that the gas flow generated by the protective gas cannot directly blow to the weld, thereby avoiding the molten solder at the weld from splashing, which is beneficial to further improve the welding quality.
[0035] Specific to the embodiment, the joint 29 is installed at the suction port 28 of the side plate 23, and the joint 29 is communicated with the external negative pressure source through a pipeline, so that the suction port 28 is communicated with the external negative pressure source, and the external negative pressure source can generate negative pressure at the suction port 28, and then the smoke in the welding space 25 is exhausted.
[0036] Specific to the embodiment, the side plate 23 also has a through hole. The nozzle 27 is arranged in the through hole of the side plate 23 and is fixedly connected with the side plate through a locking piece. In this way, the nozzle 27 is locked and fixed at the through hole of the side plate 23 through the locking piece, so as to avoid shaking of the nozzle 27 during use. It should be noted that the locking piece can be a threaded locking piece such as a nut or a sleeve, as long as it can realize the fixed connection between the nozzle 27 and the side plate 23, and is not limited here.
[0037] It can be understood that the above-mentioned external negative pressure source can be an air suction pump, and of course can also be other devices capable of generating negative pressure, as long as it can generate negative pressure at the suction port 28. The negative pressure of the suction port 28 cannot be too large or too small. If the negative pressure of the suction port 28 is too large, the protective gas blown out by the nozzle 27 will enter the suction port 28 before the air in the welding space 25 is exhausted, resulting in the presence of air in the welding space 25 and the phenomenon of oxidation of the weld. If the negative pressure of the suction port 28 is too small, the smoke generated by welding cannot be completely exhausted, resulting in poor dust removal effect. The size of the negative pressure of the suction port 28 can be adjusted according to the size of the welding space 25, the size of the welding power and other factors, and is not specially limited here.
[0038] In the embodiment of the application, the nozzle 27 and the suction port 28 are provided with multiple (i.e. two or more). Each nozzle 27 corresponds to each suction port 28, each nozzle 27 blows out protective gas towards the corresponding suction port 28, and the directions (i.e. blowing directions) of the protective gas blown out by at least two nozzles 27 intersect, so as to generate intersecting air flow in the welding space 25, so that the protective gas can rapidly fill the entire welding space 25, i.e. the air is exhausted from the welding space 25, and the intersecting air flow effectively avoids the scattering of dust, further reduces the risk of blowing dust onto the weld, thereby reducing the risk of generating welding defects such as blowhole, porosity and collapse, and further improving the welding quality.
[0039] In the embodiment, the number of side plates 23 is also multiple, and the multiple side plates 23 and the top plate 21 jointly enclose the welding space 25. In the two side plates 23 arranged at least partially opposite to each other, one side plate 23 is provided with the nozzle 27, and the other side plate 23 is provided with the gas suction port 28, so that the nozzle 27 blows the shielding gas substantially toward the gas suction port 28 opposite to it, so that the gas flow generated by the welding enters the gas suction port 28 to be discharged, avoiding the gas flow blown by the nozzle 27 directly blowing to the weld, and due to the cross flow formed, the air in the welding space 25 can be ensured to be discharged, and the protection of the weld can be ensured.
[0040] In one embodiment, the nozzle 27 and the gas suction port 28 are both provided as two, and the two nozzles 27 are respectively a first nozzle 27a and a second nozzle 27b. The two gas suction ports 28 are respectively a first gas suction port 28a and a second gas suction port 28b. The first nozzle 27a and the first gas suction port 28a are arranged opposite to each other in a first preset direction X1, and the first nozzle 27a blows the shielding gas to the first gas suction port 28a along the first preset direction X1. The second nozzle 27b and the second gas suction port 28b are arranged opposite to each other in a second preset direction X2, and the second nozzle 27b blows the shielding gas to the second gas suction port 28b along the second preset direction X2. The first preset direction X1 and the second preset direction X2 intersect, so that the shielding gas blown by the first nozzle 27a and the shielding gas blown by the second nozzle 27b form a cross flow.
[0041] Further, the first nozzle 27a and the first gas suction port 28a are respectively located on both sides of the welding head 13 in the first preset direction X1, and the second nozzle 27b and the second gas suction port 28b are respectively located on both sides of the welding head 13 in the second preset direction X2, so that the intersection of the gas flow blown by the first nozzle 27a and the gas flow blown by the second nozzle 27b is substantially located in the middle region of the welding space 25 (i.e. the welding head 13), so as to ensure that the weld is filled with shielding gas and is also oxidized by avoiding contact with oxygen in the air.
[0042] Further, each side plate 23 of the dust cover 22 comprises a first side plate 23 and a second side plate 23 arranged oppositely along the first preset direction X1, and a third side plate 23 and a fourth side plate 23 arranged oppositely along the second preset direction X2. The first side plate 23 is provided with the first nozzle 27a, and the second side plate 23 is provided with the first suction port 28a. The third side plate 23 is provided with the second nozzle 27b, and the fourth side plate 23 is provided with the second suction port 28b. In this way, the protective gas blown out by the first nozzle 27a and the second nozzle 27b forms a cross airflow, which on one hand is conducive to filling the entire welding space 25 and improving the protection effect on the weld, and on the other hand effectively avoids dust flying and further reduces the risk of blowing dust onto the weld, thereby reducing the risk of generating welding defects such as blowholes, pores, and collapse, and further improving the welding quality.
[0043] It should be noted that, optionally, the dust cover 22 comprises only the first side plate 23, the second side plate 23, the third side plate 23, and the fourth side plate 23, which enclose the welding space 25 in a substantially rhombus shape. Of course, in other embodiments, the dust cover 22 can also comprise other side plates 23, which are not limited herein. That is, in some embodiments, the cross-sectional shape of the dust cover 22 is rhombus, so that the dust cover 22 encloses the welding space 25 in a substantially rhombus shape. Compared with the scheme in which the cross section of the dust cover 22 is square or rectangular, the scheme in which the cross section of the dust cover 22 is rhombus has the characteristic of better dust removal effect.
[0044] Optionally, the welding head 13 can adopt a copper nozzle. Of course, in other embodiments, the welding head 13 can also adopt other materials as long as the high-temperature resistance and anti-deformation performance meet the requirements, which are not limited herein.
[0045] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.
[0046] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A dust removal protection mechanism characterized by comprising: The dust cover (22) comprises a top plate (21) and a side plate (23) connected to one side of the top plate (21), the top plate (21) has a mounting hole (211), and the side plate (23) is arranged around the mounting hole (211) to form a welding space (25) together with the top plate (21); the mounting hole (211) on the top plate (21) is used for allowing the welding head (13) to penetrate into the welding space (25); and A nozzle (27) is installed on the side plate (23) and used for blowing protective gas into the welding space (25). The side plate (23) is further provided with an air outlet (28) for connecting to an external negative pressure source, and the air outlet (28) is used for discharging smoke in the welding space (25). The nozzle (27) and the air outlet (28) are both provided in multiple numbers, each nozzle (27) corresponds to an air outlet (28), each nozzle (27) blows protective gas towards the corresponding air outlet (28), and the blowing directions of at least two nozzles (27) intersect.
2. The dust removal protection mechanism according to claim 1, characterized by, The side plate (23) is provided in multiple numbers, and multiple side plates (23) and the top plate (21) jointly form the welding space (25).
3. The dust shield mechanism of claim 2, wherein, Among at least two side plates (23) arranged opposite to each other, one side plate (23) is provided with the nozzle (27), and the other side plate (23) is provided with the air outlet (28). The nozzle (27) and the air outlet (28) are both provided in two numbers, the two nozzles (27) are respectively a first nozzle (27a) and a second nozzle (27b), and the two air outlets (28) are respectively a first air outlet (28a) and a second air outlet (28b).
4. The dust removal protection mechanism according to claim 1, characterized by, The first nozzle (27a) and the first air outlet (28a) are arranged opposite to each other in a first preset direction (X1), the first nozzle (27a) blows protective gas towards the first air outlet (28a) along the first preset direction (X1); the second nozzle (27b) and the second air outlet (28b) are arranged opposite to each other in a second preset direction (X2), the second nozzle (27b) blows protective gas towards the second air outlet (28b) along the second preset direction (X2), and the first preset direction (X1) intersects the second preset direction (X2). The first nozzle (27a) and the first air outlet (28a) are respectively located on two sides of the welding head (13) in the first preset direction (X1), and the second nozzle (27b) and the second air outlet (28b) are respectively located on two sides of the welding head (13) in the second preset direction (X2).
5. The dust shield mechanism of claim 4, wherein, 6. The dust shield mechanism of claim 4, wherein The side plates (23) are arranged in plurality, and the plurality of side plates (23) and the top plate (21) jointly form the welding space (25), wherein each side plate (23) comprises a first side plate (23) and a second side plate (23) arranged oppositely along the first preset direction (X1), and a third side plate (23) and a fourth side plate (23) arranged oppositely along the second preset direction (X2); The first side plate (23) is provided with the first nozzle (27a), the second side plate (23) is provided with the first suction port (28a), the third side plate (23) is provided with the second nozzle (27b), and the fourth side plate (23) is provided with the second suction port (28b).
7. The dust shield mechanism of claim 1, wherein A connector (29) is arranged on the suction port (28) of the side plate (23), and the connector (29) is used for being communicated with an external negative pressure source through a pipeline.
8. The dust shield mechanism of claim 1, wherein, The side plate (23) is further provided with a through hole, the nozzle (27) is arranged in the through hole, and the nozzle (27) is fixedly connected with the side plate (23) through a locking member.
9. The dust shield mechanism of claim 1, wherein, The cross-sectional shape of the dust cover (22) is a rhombus.
10. A laser welding apparatus characterized by comprising: The welding mechanism (10) comprises a mechanism body (11) and a welding head (13) arranged at one end of the mechanism body (11), the top plate (21) is sleeved on one end of the mechanism body (11) provided with the welding head (13) through the mounting hole (211), so that the welding head (13) is located in the welding space (25).
11. The laser welding apparatus of claim 10, wherein, The welding head (13) is a copper nozzle.