Welding device

Abstract

The utility model relates to a welding device. The welding device comprises a laser assembly; the cooling base is connected to the laser assembly and provided with an airflow channel, an air inlet and a cooling flow channel, the airflow channel penetrates through the end, close to the laser assembly, of the cooling base and the end, away from the laser assembly, of the cooling base, and the air inlet communicates with the airflow channel; the welding nozzle assembly comprises a welding nozzle installed at the end, away from the laser assembly, of the cooling base, the welding nozzle communicates with the airflow channel so that gas in the airflow channel can be sprayed out of the welding nozzle, and laser emitted by the laser assembly penetrates through the airflow channel and is sprayed out of the welding nozzle. Thus, heat generated by welding in the continuous welding operation process is transmitted to the welding nozzle, the cooling base is close to the welding nozzle, so that a cooling medium flowing through the cooling flow channel of the cooling base takes away the heat of the welding nozzle, the cooling effect on the welding nozzle is good, the risk that the welding nozzle is greatly deformed and even disengaged due to the too high temperature is greatly reduced, and the welding quality is improved. And the service life of the welding device is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, and particularly relates to a welding device. Background Art

[0002] During the manufacturing process of lithium batteries, a welding head is required to perform laser welding on the batteries, that is, the laser emitted by the welding head is used to perform continuous full-weld welding along the weld on the battery to be welded. Conventionally, a copper nozzle needs to be provided on the welding head, and nitrogen gas is blown out through the copper nozzle to the welding position. On the one hand, it avoids the backflow of dust and welding slag generated during the welding process into the interior of the welding head. On the other hand, nitrogen gas is used to protect the solder at the welding position to avoid high-temperature oxidation and improve the welding quality. However, during long-term full-weld welding, the high temperature generated by the welding is continuously transferred to the copper nozzle, and the distance between the cooling cavity on the welding head and the copper nozzle is relatively far (this distance generally reaches about 149 mm), resulting in poor cooling effect on the copper nozzle, causing the copper nozzle to accumulate a large amount of heat and deform or even fall off, thereby greatly reducing the service life of the welding head. Summary of the Utility Model

[0003] Based on this, in view of the problem that during long-term full-weld welding of the welding head in the prior art, the high temperature generated by the welding is continuously transferred to the copper nozzle, and the distance between the cooling cavity on the welding head and the copper nozzle is relatively far, resulting in poor cooling effect on the copper nozzle, causing the copper nozzle to accumulate a large amount of heat and deform or even fall off, thereby greatly reducing the service life of the welding head, it is necessary to provide a welding device that improves the above defects.

[0004] A welding device includes:

[0005] A laser assembly;

[0006] A cooling seat connected to the laser assembly. The cooling seat has an air flow channel, an air inlet, and a cooling flow channel through which a cooling medium flows. The air flow channel penetrates through one end of the cooling seat close to the laser assembly and the other end far from the laser assembly, and the air inlet is communicated with the air flow channel; and

[0007] A nozzle assembly including a nozzle installed at one end of the cooling seat facing away from the laser assembly. The nozzle is communicated with the air flow channel so that the gas in the air flow channel is ejected from the nozzle, and the laser emitted by the laser assembly passes through the air flow channel and is ejected from the nozzle.

[0008] In one embodiment, the nozzle assembly further includes an adapter seat. The adapter seat is connected to one end of the cooling seat facing away from the laser assembly, and the nozzle is connected to one end of the adapter seat facing away from the cooling seat. The adapter seat has an adapter channel for the laser and gas to pass through.

[0009] In one embodiment, the adapter seat is constructed to be able to operably adjust its relative position to the cooling seat, so as to drive the welding nozzle to adjust its position in a direction close to or away from the cooling seat.

[0010] In one embodiment, the adapter seat is threadedly connected to the cooling seat.

[0011] In one embodiment, the welding nozzle assembly further includes two clamps, and the ends of the adapter and the welding nozzle facing each other are located between the two clamps, and the two clamps are constructed to operably clamp or loosen the ends of the adapter and the welding nozzle facing each other.

[0012] In one embodiment, the welding nozzle assembly further includes two threaded locking parts, and the ends of the two clamps on one side of the welding nozzle are locked and fixed by one of the threaded locking parts, and the ends of the two clamps on the other side of the welding nozzle are locked and fixed by the other threaded locking parts.

[0013] In one embodiment, the welding nozzle assembly further includes a threaded locking member, the ends of the two clamps located on one side of the welding nozzle are hinged to each other, and the ends of the two clamps located on the other side of the welding nozzle are locked and fixed by the threaded locking member.

[0014] In one embodiment, the adapter seat has a first annular protrusion on one end facing the welding nozzle, and the welding nozzle has a second annular protrusion on one end facing the adapter seat, and the inner walls of the two clamps facing each other have anti-slip grooves for accommodating the first annular protrusion and the second annular protrusion.

[0015] In one embodiment, the cooling seat further has a liquid inlet and a liquid outlet both connected to the cooling channel, the liquid inlet is used to communicate with an external liquid supply pipeline, and the liquid outlet is used to communicate with an external liquid discharge pipeline.

[0016] In one embodiment, the cooling channel is arranged around the air flow channel.

[0017] In the above-mentioned welding device, the heat generated by welding is transferred to the welding nozzle during continuous welding operations. Since the cooling seat is close to the welding nozzle, the cooling medium flowing through the cooling channel of the cooling seat takes away the heat of the welding nozzle, which has a better cooling effect on the welding nozzle, thereby greatly reducing the risk of the welding nozzle causing large deformation or even detachment due to excessive temperature, and greatly improving the service life of the welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a welding device in one embodiment of the present utility model;

[0019] Figure 2 The Figure 1 cross-sectional view of the welding device shown;

[0020] Figure 3 The Figure 1 cross-sectional view of the welding device shown along the A-A direction;

[0021] Figure 4 The Figure 1 front view of the welding device shown (the laser assembly is omitted). Detailed implementation manners

[0022] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following will describe in detail the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model 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 utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present utility model, 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", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0025] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0028] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides a welding device for laser welding of a product to be welded. The product to be welded may be a battery or other products that require laser welding, and no limitation is made here.

[0029] The welding device includes a laser assembly 10, a cooling seat 20 and a welding nozzle assembly 30. The laser assembly 10 is used to emit a laser for welding the product to be welded. The cooling seat 20 is connected to the side of the laser assembly 10 that emits the laser. The cooling seat 20 has an air flow channel 24, an air inlet 23 and a cooling flow channel 25. The air flow channel 24 runs through one end of the cooling seat 20 close to the laser assembly 10 and the other end away from the laser assembly 10, so that the laser emitted by the laser assembly 10 can pass through the air flow channel 24 of the cooling seat 20. The air inlet 23 on the cooling seat 20 is used to supply gas to enter the air flow channel 24 and allow the gas to flow along the air flow channel 24. The welding nozzle assembly 30 includes a welding nozzle 31 installed at the end of the cooling seat 20 away from the laser assembly 10. The welding nozzle 31 is connected to the air flow channel 24 so that the laser light emitted by the laser assembly 10 passes through the air flow channel 24 and is ejected from the welding nozzle 31, thereby performing laser welding on the product to be welded. At the same time, the gas entering the air flow channel 24 flows toward the welding nozzle 31 and is ejected from the welding nozzle 31 to the welding part of the product to be welded, that is, the welding nozzle 31 blows air to the welding part of the product to be welded, thereby preventing foreign matter such as dust or welding slag generated during the welding process from entering the interior of the laser assembly 10 through the air flow channel 24 and causing damage to the laser assembly 10. Optionally, the welding nozzle 31 can be made of a copper nozzle. Of course, in other embodiments, the welding nozzle 31 can also be made of other heat-resistant materials, which are not limited here.

[0030] In the above-mentioned welding device, the heat generated by welding is transferred to the welding nozzle 31 during continuous welding operations. Since the cooling seat 20 is close to the welding nozzle 31, the cooling medium flowing through the cooling channel 25 of the cooling seat 20 takes away the heat of the welding nozzle 31, which has a better cooling effect on the welding nozzle 31, thereby greatly reducing the risk of the welding nozzle 31 causing large deformation or even detachment due to excessive temperature, and greatly improving the service life of the welding device.

[0031] It should be noted that the air inlet 23 is connected to an external air supply line. The gas provided by the external air supply line enters the air flow channel 24 of the cooling base 20 through the air inlet 23. The gas entering the air flow channel 24 of the cooling base 20 through the air inlet 23 can be a protective gas such as nitrogen. The welding nozzle 31 blows this protective gas toward the welding position, thereby preventing the high-temperature solder from coming into contact with oxygen in the air and being oxidized, greatly improving the welding quality.

[0032] It should also be noted that since the cooling medium in the cooling channel 25 of the cooling seat 20 has a better cooling effect on the welding nozzle 31, the efficiency of the heat of the welding nozzle 31 being transferred to the laser component 10 through the cooling seat 20 is greatly reduced, thereby avoiding the laser component 10 from overheating.

[0033] Specifically in the embodiment, the cooling base 20 further has a liquid inlet 21 and a liquid outlet 22 both communicating with the cooling flow channel 25. The liquid inlet 21 is communicated with an external liquid supply pipeline, and the liquid outlet 22 is communicated with an external liquid discharge pipeline. In this way, the cooling medium provided by the external liquid supply pipeline enters the cooling flow channel 25 through the liquid inlet 21 and flows along the cooling flow channel 25, and the cooling medium in the cooling flow channel 25 flows out through the liquid outlet 22 to the external liquid discharge pipeline, thereby taking away the heat of the welding nozzle 31, that is, realizing the cooling of the welding nozzle 31. It should be noted that the cooling medium can be cooling water, and of course it can also be other types of cooling liquids, which are not limited herein.

[0034] Specifically in the embodiment, the cooling flow channel 25 is arranged around the gas flow channel 24, so as to increase the area of the inner wall of the cooling flow channel 25 as much as possible, and further increase the heat exchange area to further improve the cooling effect.

[0035] Please refer to Figure 4 As shown, in the embodiment of the present application, the welding nozzle assembly 30 further includes an adapter base 32, and the adapter base 32 is connected to one end of the cooling base 20 away from the laser assembly 10. The welding nozzle 31 is connected to one end of the adapter base 32 away from the cooling base 20, so as to realize the assembly of the cooling base 20 and the welding nozzle 31 by using the adapter base 32. The adapter base 32 has an adapter channel 321 for the laser and gas to pass through, so that the laser emitted by the laser assembly 10 sequentially passes through the gas flow channel 24 of the cooling base 20 and the adapter channel 321 of the adapter base 32 and then is emitted by the welding nozzle 31. At the same time, the gas entering the gas flow channel 24 of the cooling base 20 from the air inlet 23 flows to the adapter channel 321 of the adapter base 32 and then is blown out by the welding nozzle 31.

[0036] Specifically, the distance between the end of the welding nozzle 31 far from the cooling base 20 and the cooling base 20 is between 28 mm and 48 mm. Optionally, the distance between the end of the welding nozzle 31 far from the cooling base 20 and the cooling base 20 is 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 41 mm or 42 mm, etc. It should be noted that in the prior art, the distance between the welding nozzle and the cooling component with a cooling effect is about 149 mm. Compared with the prior art, in the present application, the welding nozzle 31 is indirectly connected to the cooling base 20 through the adapter base 32, realizing the effect of lowering the cooling base 20, so that the distance between the end of the welding nozzle 31 far from the cooling base 20 and the cooling base 20 can be reduced to about 38 mm, which is beneficial to improving the cooling effect on the welding nozzle 31. [[ID=X]] [[ID=Y]]

[0037] Specifically, in the embodiment, the adapter base 32 is configured to operably adjust the relative position with the cooling base 20, so as to drive the welding nozzle 31 to perform position adjustment in a direction close to or away from the cooling base 20. In this way, the position of the welding nozzle 31 relative to the cooling base 20 can be adjusted through the adapter base 32, so as to achieve the purpose of adjusting the distance between the welding nozzle 31 and the welding position of the product to be welded, and ensure that the distance between the welding nozzle 31 and the welding position of the product to be welded meets the process requirements during welding.

[0038] Optionally, the adapter base 32 is threadedly connected to the cooling base 20, so as to realize the adjustment of the relative position of the adapter base 32 relative to the cooling base 20 by screwing the adapter base 32, and further drive the adapter base 32 to drive the welding nozzle 31 to approach or move away from the cooling base 20, that is, to achieve the purpose of adjusting the distance between the welding nozzle 31 and the welding position of the product to be welded, and the adjustment operation is simple and fast.

[0039] Specifically, a threaded hole 27 is provided at one end of the cooling base 20 facing away from the laser assembly 10, and the end of the adapter base 32 facing away from the welding nozzle 31 has an external thread. During assembly, the end of the adapter base 32 facing away from the welding nozzle 31 is screwed into the threaded hole 27 of the cooling base 20, so that the internal thread of the threaded hole 27 is screwed with the external thread on the adapter base 32, thereby realizing the threaded connection between the adapter base 32 and the cooling base 20. In this way, the relative position of the adapter base 32 and the cooling base 20 is adjusted by adjusting the depth of the adapter base 32 screwed into the threaded hole 27 of the cooling base 20, so that the adapter base 32 drives the welding nozzle 31 to approach or move away from the welding position of the product to be welded until the distance between the welding nozzle 31 and the welding position of the product to be welded meets the process requirements.

[0040] In the embodiment of the present application, the welding nozzle assembly 30 further includes two hoop clamps 33, and the ends of the adapter base 32 and the welding nozzle 31 facing each other are both located between the two hoop clamps 33. The two hoop clamps 33 are configured to operably hold or loosen the ends of the adapter base and the welding nozzle 31 facing each other. When the two hoop clamps 33 are loosened, the welding nozzle 31 can be separated from the adapter base 32, so as to realize the disassembly of the welding nozzle 31; when the two hoop clamps 33 are tightened, the welding nozzle 31 is fixed relative to the adapter base 32, so as to realize the installation of the welding nozzle 31. In this way, the detachable assembly of the welding nozzle 31 and the adapter base 32 is realized by using the way of tightening the hoop clamps 33. On the one hand, the disassembly and assembly of the welding nozzle 31 are convenient and fast, greatly improving the efficiency of replacing the welding nozzle 31; on the other hand, compared with the existing technology of realizing the assembly of the welding nozzle 31 by using a threaded connection method, even if the welding nozzle 31 generates a certain amount of deformation due to excessive temperature after the hoop clamps 33 are tightened, the welding nozzle 31 will not fall off, that is, the effect of preventing the welding nozzle 31 from falling off is achieved.

[0041] Optionally, the welding tip assembly 30 further includes two threaded locking members 34. The ends of the two retaining rings 33 on one side of the welding tip 31 are locked and fixed by one of the threaded locking members 34, and the ends of the two retaining rings 33 on the other side of the welding tip 31 are locked and fixed by the other threaded locking member 34, so as to clamp and fix the welding tip 31 and the adapter base 32 between the two retaining rings 33 to prevent the welding tip 31 from falling off. In this way, the two retaining rings 33 are locked by the threaded locking members 34 on both sides, so that the two retaining rings 33 clamp the welding tip 31 and the adapter base 32 therebetween. When it is necessary to remove the welding tip 31, loosen the two threaded locking members 34 to make the two retaining rings 33 release the adapter base 32 and the welding tip 31, so that the welding tip 31 can be removed from between the two retaining rings 33. It can be understood that the threaded locking member 34 can be a high-temperature resistant screw or a high-temperature resistant bolt, etc., which is not limited herein.

[0042] It should be noted that the structure of the retaining ring 33 is not limited to this, as long as it can realize clamping or releasing the welding tip 31 and the adapter base 32 by the retaining ring 33. For example, in some other embodiments, the ends of the two retaining rings 33 on one side of the welding tip 31 are hinged to each other, and the ends of the two retaining rings 33 on the other side of the welding tip 31 are locked and fixed by the threaded locking member 34. In this way, only one threaded locking member 34 can lock the two retaining rings 33 so that the two retaining rings 33 clamp the welding tip 31 and the adapter base 32, thus simplifying the operation of installing and removing the welding tip 31.

[0043] Specifically in the embodiment, one end of the adapter base 32 facing the welding tip 31 has a first annular convex portion 322, and one end of the welding tip 31 facing the adapter base 32 has a second annular convex portion 312. The inner walls of the two retaining rings 33 facing each other have anti-detachment grooves for accommodating the first annular convex portion 322 and the second annular convex portion 312. In this way, when the two retaining rings 33 clamp the adapter base 32 and the welding tip 31, the first annular convex portion 322 on the adapter base 32 and the second annular convex portion 312 on the welding tip 31 are limited in the anti-detachment grooves of the two retaining rings 33, so as to prevent the welding tip 31 from falling off between the two retaining rings 33.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0045] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A welding device, characterized in that, Comprising: A laser assembly (10); A cooling seat (20), connected to the laser assembly (10), the cooling seat (20) having an air flow channel (24), an air inlet (23) and a cooling flow channel (25) for a cooling medium to flow through, the air flow channel (24) penetrating through one end of the cooling seat (20) close to the laser assembly (10) and one end far from the laser assembly (10), the air inlet (23) communicating with the air flow channel (24); and A welding nozzle assembly (30), including a welding nozzle (31) installed at one end of the cooling seat (20) facing away from the laser assembly (10), the welding nozzle (31) communicating with the air flow channel (24) so that the gas in the air flow channel (24) is ejected from the welding nozzle (31), and the laser emitted by the laser assembly (10) passes through the air flow channel (24) and is emitted from the welding nozzle (31).

2. The welding device according to claim 1, characterized in that, The welding nozzle assembly (30) further includes an adapter seat (32), the adapter seat (32) being connected to one end of the cooling seat (20) facing away from the laser assembly (10), the welding nozzle (31) being connected to one end of the adapter seat (32) facing away from the cooling seat (20), and the adapter seat (32) having an adapter channel (321) for the laser and the gas to pass through.

3. The welding device according to claim 2, characterized in that, The adapter seat (32) is configured to operably adjust the relative position with the cooling seat (20) to drive the welding nozzle (31) to perform position adjustment in a direction close to or away from the cooling seat (20).

4. The welding device according to claim 3, characterized in that, The adapter seat (32) is threadedly connected to the cooling seat (20).

5. The welding device according to claim 2, characterized in that, The welding nozzle assembly (30) further includes two clamps (33), the end portions of the adapter seat (32) and the welding nozzle (31) facing each other are both located between the two clamps (33), and the two clamps (33) are configured to operably hold or release the end portions of the adapter seat and the welding nozzle (31) facing each other.

6. The welding device according to claim 5, characterized in that, The welding nozzle assembly (30) further includes two threaded locking members (34), the end portions of the two clamps (33) on one side of the welding nozzle (31) are locked and fixed by one of the threaded locking members (34), and the end portions of the two clamps (33) on the other side of the welding nozzle (31) are locked and fixed by the other threaded locking member (34).

7. The welding device according to claim 5, characterized in that The welding nozzle assembly (30) further includes a threaded locking member (34), the end portions of the two clamps (33) on one side of the welding nozzle (31) are hinged to each other, and the end portions of the two clamps (33) on the other side of the welding nozzle (31) are locked and fixed by the threaded locking member (34).

8. The welding device according to claim 5, characterized in that, One end of the adapter seat (32) facing the welding nozzle (31) has a first annular convex portion (322), one end of the welding nozzle (31) facing the adapter seat (32) has a second annular convex portion (312), and the inner walls of the two clamps (33) facing each other have anti - detachment grooves for accommodating the first annular convex portion (322) and the second annular convex portion (312).

9. The welding device according to any one of claims 1 to 8, characterized in that, The cooling base (20) further has a liquid inlet (21) and a liquid outlet (22) both communicating with the cooling flow channel (25). The liquid inlet (21) is used for communicating with an external liquid supply pipeline, and the liquid outlet (22) is used for communicating with an external liquid discharge pipeline.

10. The welding device according to any one of claims 1 to 8, characterized in that, The cooling flow channel (25) is arranged to surround the air flow channel (24).

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