Dust removal device suitable for laser welding

Abstract

The utility model relates to a dust removal device suitable for laser welding, which comprises an emitting head, a dust removal device and a dust removal device, the emitting head is provided with a laser channel for a laser beam to pass through, a welding opening used for being in butt joint with a welding area of a workpiece is formed in the bottom of the laser channel, and the emitting head is further provided with a shielding gas channel for introducing shielding gas into the welding opening; and the dust removal cover is connected to one end of the emitting head and communicates with the shielding gas channel, and a plurality of gas extraction channels which are used for extracting dust at the welding opening and are of a spiral rising structure are formed in the periphery of the dust removal cover. A plurality of air exhaust channels which are used for exhausting dust at the welding opening and are of a spiral ascending structure are formed in the periphery of the dust removal cover, and spiral ascending airflow can be formed during air exhaust of the air exhaust channels to exhaust welding slag. The air flow of the air exhaust channel is spiral, due to the Bernoulli's law, the edge air pressure is large, the center air pressure is small, and fluid has the trend of rapidly moving towards the edge, so that the air flow has higher suction force, and meanwhile, the air flow has higher stability and dust removal effect.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding, and in particular to a dust removal device suitable for laser welding. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. Laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. The laser welding shielding gas blows away the high-temperature plasma gas, re-exposing the weld to further form a molten pool, and a good dust removal structure can absorb the blown plasma gas to ensure that the plasma gas does not accumulate and cool to form welding slag, which blocks the shielding gas and laser path.

[0003] In the current laser welding process, during the high-power deep melting process, the molten pool is unstable and reacts strongly, which easily produces defects such as metal splash and explosion points. The welding process is more likely to produce metal splash and explosion points. The welding slag formed by splash and explosion points can easily fall into the battery cell, which not only affects the performance quality of the battery, but also causes serious safety hazards to the battery. For this reason, it is necessary to provide a laser welding protective dust removal device to remove dust near the laser channel, improve the energy of the processing laser, and ensure the quality of the battery. Summary of the invention

[0004] The embodiment of the present application provides a dust removal device suitable for laser welding to solve the problem that metal splashes and explosion points are easily generated during the laser welding process in the related art. The welding slag formed by the splashes and explosion points can easily fall into the battery cell, which not only affects the performance quality of the battery, but also causes serious safety hazards to the battery.

[0005] The embodiment of the present application provides a dust removal device suitable for laser welding, comprising:

[0006] An output head, wherein the output head is provided with a laser channel for the laser beam to pass through, the bottom of the laser channel forms a welding port for docking with the welding area of ​​the workpiece, and the output head is also provided with a shielding gas channel for introducing shielding gas into the welding port;

[0007] A dust removal hood is connected to one end of the ejection head and communicated with the protective gas channel. The outer periphery of the dust removal hood is provided with a plurality of exhaust channels in a spiral ascending structure for extracting dust from the welding port.

[0008] In some embodiments: the dust hood is a cylindrical structure, and an upper interface extending into the welding port and the protective gas channel is provided at one end of the dust hood close to the outlet head, and a welding chamber with an open bottom is provided at one end of the dust hood away from the outlet head, and the exhaust channel is located between the side wall of the welding chamber and the side wall of the dust hood.

[0009] In some embodiments: the flow area of ​​the air extraction channel gradually decreases from the air inlet of the air extraction channel to the air outlet of the air extraction channel, and the air outlet of the air extraction channel is provided with a mounting joint for connecting an air extraction pipeline.

[0010] In some embodiments: a plurality of the protective gas channels are provided, and the plurality of the protective gas channels are evenly distributed on the circumference of the outlet head, and the positions of the plurality of the protective gas channels correspond one to one to the positions of the plurality of the exhaust channels.

[0011] In some embodiments, the number of the protective gas channels and the number of the exhaust channels are the same, and the number of the protective gas channels and the exhaust channels is 3-12.

[0012] In some embodiments: an internal thread is provided in the upper interface of the dust cover, an external thread is provided at one end of the outlet head close to the welding port, and the dust cover and the outlet head are fastened together by threads.

[0013] In some embodiments: a laser pipe coaxially arranged with the laser channel for allowing the laser beam to pass is provided in the laser channel of the output head, and a plurality of circumferentially arranged ribs are provided on the outer wall of the laser pipe. The plurality of ribs extend along the length direction of the laser pipe, and two adjacent ribs and the inner wall of the laser channel together form the protective gas channel.

[0014] In some embodiments: a plurality of protective gas inlet passages are provided on the side wall of the ejection head, and the plurality of protective gas inlet passages are connected to the protective gas channels in a one-to-one correspondence.

[0015] In some embodiments, the air inlet position height of the air extraction channel of the dust removal cover is the same as the air outlet position height of the protective gas channel of the output head.

[0016] In some embodiments: the bottom surface of the dust cover is a plane.

[0017] The beneficial effects of the technical solution provided by this application include:

[0018] An embodiment of the present application provides a dust removal device suitable for laser welding. The dust removal device suitable for laser welding of the present application is provided with an outlet head, the outlet head is provided with a laser channel for passing the laser beam, a welding port for docking with the welding area of ​​the workpiece is formed at the bottom of the laser channel, and the outlet head is also provided with a protective gas channel for introducing protective gas into the welding port; a dust removal hood is connected to one end of the outlet head and is connected to the protective gas channel, and a plurality of exhaust channels in a spiral ascending structure for extracting dust at the welding port are provided on the outer periphery of the dust removal hood.

[0019] Therefore, the dust removal device suitable for laser welding of the present application is provided with a plurality of exhaust channels in a spiral ascending structure on the outer periphery of the dust removal hood for extracting dust from the welding port. When the exhaust channel is evacuated, a spiral ascending airflow can be formed to extract the welding slag. The airflow in the exhaust channel is spiral. Due to Bernoulli's principle, the air pressure at the edge of the spiral airflow is high and the air pressure at the center is low. The fluid tends to move quickly to the edge, so it has a stronger suction force. At the same time, the airflow will have stronger stability and dust removal effect. The dust removal hood can quickly remove dust near the laser channel, improve the energy of the processing laser, and ensure the quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0022] Figure 2 This is a bottom view of the structure of the dust cover according to an embodiment of the present application.

[0023] Reference numerals:

[0024] 10. Output head; 11. Laser channel; 12. Welding port; 13. Shielding gas channel; 14. Laser pipeline; 15. Shielding gas inlet;

[0025] 20. Dust hood; 21. Air extraction channel; 22. Mounting joint; 23. Welding chamber. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The embodiment of the present application provides a dust removal device suitable for laser welding, which can solve the problem in the related art that the laser welding process is more likely to produce metal spatter and explosion points, and the welding slag formed by the spatter and explosion points can easily fall into the battery cell, which not only affects the performance quality of the battery, but also causes serious safety hazards to the battery.

[0028] See also Figure 1 and Figure 2 As shown, the embodiment of the present application provides a dust removal device suitable for laser welding, comprising:

[0029] The output head 10 is used to connect to the laser. The output head 10 is provided with a laser channel 11 for the laser beam to pass through. A welding port 12 for docking with the welding area of ​​the workpiece is formed at the bottom of the laser channel 11. The output head 10 is also provided with a protective gas channel 13 for introducing protective gas to the welding port 12.

[0030] The dust removal cover 20 is connected to one end of the ejection head 10 and communicated with the protective gas channel 13 . A plurality of exhaust channels 21 in a spiral ascending structure for extracting dust from the welding port 12 are provided on the outer periphery of the dust removal cover 20 .

[0031] When laser welding is working, the shielding gas is blown out, and the dust removal and exhaust gas starts to work. The plasma gas formed by the high temperature during laser welding of the workpiece will be discharged from the dust removal hood 20 in the air channel formed by the shielding gas and the dust removal and exhaust gas. The shielding gas for laser welding is input from the outside of the output head 10, and after entering the output head 10, it is parallel to the laser channel 11 and output in the direction of the welding port 12. The shielding gas will disperse the plasma gas formed by welding at the dust removal hood 20, forming a small-scale vortex.

[0032] The center line of the exhaust channel 21 is not at a normal angle to the central axis of the dust hood 20, but forms a certain acute angle. At the acute angle, the airflow is spiral. Due to Bernoulli's principle, the edge pressure of the spiral airflow is large and the center pressure is small. The fluid tends to move quickly to the edge. Therefore, the dust hood 20 has a stronger suction force, and the airflow will have stronger stability and dust removal effect.

[0033] See also Figure 1 and Figure 2As shown, the embodiment of the present application provides a dust removal device suitable for laser welding, wherein the dust removal cover 20 of the dust removal device is a cylindrical structure, and an upper interface extending into the welding port 12 and the protective gas channel 13 is provided at one end of the dust removal cover 20 close to the ejection head 10. A welding chamber 23 with an open bottom is provided at one end of the dust removal cover 20 away from the ejection head 10, and the exhaust channel 21 is located between the side wall of the welding chamber 23 and the side wall of the dust removal cover 20.

[0034] The flow area of ​​the exhaust channel 21 gradually decreases from the air inlet of the exhaust channel 21 to the air outlet of the exhaust channel 21, and the air outlet of the exhaust channel 21 is provided with a mounting joint 22 for connecting the exhaust pipe. There are 3-12 protective gas channels, and the plurality of protective gas channels 13 are evenly arranged on the circumference of the ejection head 10, and the positions of the plurality of protective gas channels 13 and the plurality of exhaust channels 21 correspond one to one.

[0035] The number of the shielding gas channel 13 and the exhaust channel 21 in the embodiment of the present application is the same, and the number of the shielding gas channel 13 and the exhaust channel 21 is preferably, but not limited to, 6. When the exhaust channel 21 is exhausted, a spiral upward airflow can be formed to extract the welding slag. The flow area of ​​the exhaust channel 21 is first large and then small along the airflow direction. This structure will make the air pressure at the inner wall opening small and the air pressure at the outer wall opening large. As the fluid is sucked out of the large opening to the small opening, the flow rate will gradually increase. Under this structure, the fluid stability is stronger, and the six exhaust channels 21 are distributed relative to the circumference of the axis.

[0036] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides a dust removal device suitable for laser welding, wherein the upper interface of the dust hood 20 of the dust removal device is provided with an internal thread, and the end of the outlet head 10 close to the welding port 12 is provided with an external thread, and the dust hood 20 and the outlet head 10 are fastened together by threads, which facilitates the installation and disassembly of the dust hood 20 and the outlet head 10, as well as the processing and manufacturing of the dust hood 20 and the outlet head 10.

[0037] A laser pipe 14 is provided in the laser channel 11 of the output head 10 and is coaxially arranged with the laser channel 11 for allowing the laser beam to pass through. A plurality of circumferentially arranged ribs (not shown in the figure) are provided on the outer wall of the laser pipe 14. The plurality of ribs extend along the length direction of the laser pipe 14, and two adjacent ribs and the inner wall of the laser channel 11 together form the protective gas channel 13.

[0038] The outer wall of the laser pipe 14 is provided with a plurality of circumferentially arranged ribs. When the laser pipe 14 is inserted into the laser channel 11 of the output head 10, the ribs of the laser pipe 14 are connected to the inner wall of the laser channel 11, thereby forming a plurality of laser channels 11. Six protective gas inlet passages 15 are provided on the side wall of the output head 10, and the six protective gas inlet passages 15 are connected to the six protective gas channels 13 in a one-to-one correspondence.

[0039] The air inlet position height of the exhaust channel 21 of the dust hood 20 is the same as the air outlet position height of the shielding gas channel 13 of the ejection head 10, so that the shielding gas blown out of the shielding gas channel 13 carries the high-temperature plasma gas into the exhaust channel 21 in a shorter path and then is discharged, ensuring that the plasma gas will not accumulate and cool to form welding slag. The bottom surface of the dust hood 20 is a plane, so that the dust hood 20 is in more precise contact with the welding workpiece, preventing the shielding gas or the hot plasma gas from flowing out from the gap between the dust hood 20 and the welding workpiece.

[0040] How it works

[0041] An embodiment of the present application provides a dust removal device suitable for laser welding. The dust removal device suitable for laser welding of the present application is provided with an outlet head 10, and the outlet head 10 is provided with a laser channel 11 for passing the laser beam, and a welding port 12 for docking with the welding area of ​​the workpiece is formed at the bottom of the laser channel 11. The outlet head 10 is also provided with a protective gas channel 13 for introducing protective gas to the welding port 12; a dust hood 20, which is connected to one end of the outlet head 10 and is connected to the protective gas channel 13, and a plurality of exhaust channels 21 with a spiral ascending structure for extracting dust from the welding port 12 are provided on the outer periphery of the dust hood 20.

[0042] Therefore, the dust removal device suitable for laser welding of the present application is provided with a plurality of exhaust channels 21 in a spiral ascending structure on the outer periphery of the dust hood 20 for extracting dust from the welding port 12. When the exhaust channel 21 is evacuated, a spiral ascending airflow can be formed to extract the welding slag. The airflow of the exhaust channel 21 is spiral. Due to Bernoulli's principle, the spiral airflow has a high pressure at the edge and a low pressure at the center. The fluid tends to move quickly to the edge, so it has a stronger suction force. At the same time, the airflow will have a stronger stability and dust removal effect. The dust hood 20 can quickly remove dust near the laser channel 11, improve the energy of the processing laser, and ensure the quality of the battery.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0044] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0045] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A dust removal device suitable for laser welding, characterized in that: include: An output head (10), the output head (10) is provided with a laser channel (11) for the laser beam to pass through, the bottom of the laser channel (11) forms a welding port (12) for docking with a welding area of ​​a workpiece, and the output head (10) is also provided with a protective gas channel (13) for introducing protective gas into the welding port (12); A dust removal hood (20) is connected to one end of the ejection head (10) and communicated with the protective gas channel (13); a plurality of exhaust channels (21) in a spiral ascending structure for extracting dust from the welding port (12) are provided on the outer periphery of the dust removal hood (20).

2. A dust removal device suitable for laser welding as claimed in claim 1, characterized in that: The dust hood (20) is a cylindrical structure. An upper interface extending into the welding port (12) and the protective gas channel (13) is provided at one end of the dust hood (20) close to the ejection head (10). A welding chamber (23) with an open bottom is provided at one end of the dust hood (20) away from the ejection head (10). The exhaust channel (21) is located between the side wall of the welding chamber (23) and the side wall of the dust hood (20).

3. A dust removal device suitable for laser welding as claimed in claim 1 or 2, characterized in that: The flow area of ​​the air extraction channel (21) gradually decreases in the direction from the air inlet of the air extraction channel (21) to the air outlet of the air extraction channel (21), and the air outlet of the air extraction channel (21) is provided with a mounting joint (22) for connecting to an air extraction pipeline.

4. A dust removal device suitable for laser welding as claimed in claim 1 or 2, characterized in that: A plurality of the protective gas channels (13) are provided, and the plurality of protective gas channels (13) are evenly distributed on the circumference of the ejection head (10), and the positions of the plurality of protective gas channels (13) and the plurality of exhaust channels (21) correspond one to one.

5. A dust removal device suitable for laser welding as claimed in claim 4, characterized in that: The number of the protective gas channels (13) and the number of the exhaust channels (21) are the same, and the number of the protective gas channels (13) and the number of the exhaust channels (21) is 3-12.

6. A dust removal device suitable for laser welding as claimed in claim 2, characterized in that: An internal thread is provided in the upper interface of the dust cover (20), and an external thread is provided at one end of the outlet head (10) close to the welding port (12). The dust cover (20) and the outlet head (10) are fastened and connected via threads.

7. A dust removal device suitable for laser welding as claimed in claim 1, characterized in that: A laser pipe (14) is provided in the laser channel (11) of the output head (10) and is coaxially arranged with the laser channel (11) for allowing the laser beam to pass through. A plurality of circumferentially arranged ribs are provided on the outer wall of the laser channel (14). The plurality of ribs extend along the length direction of the laser channel (14), and two adjacent ribs and the inner wall of the laser channel (11) together form the protective gas channel (13).

8. A dust removal device suitable for laser welding as claimed in claim 7, characterized in that: A plurality of protective gas inlet passages (15) are provided on the side wall of the ejection head (10), and the plurality of protective gas inlet passages (15) are connected to the protective gas passages (13) in a one-to-one correspondence.

9. A dust removal device suitable for laser welding as claimed in claim 1, characterized in that: The air inlet position height of the air extraction channel of the dust removal cover (20) is the same as the air outlet position height of the protective gas channel (13) of the ejection head (10).

10. A dust removal device suitable for laser welding as claimed in claim 1, characterized in that: The bottom surface of the dust removal cover (20) is a plane.

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