Welding apparatus

Abstract

The utility model relates to the technical field of welding provides a kind of welding equipment.The welding equipment includes ultrasonic mechanism and laser welding mechanism.Laser welding mechanism is embedded in ultrasonic mechanism, and part is exposed to ultrasonic mechanism. Among them, laser welding mechanism is coaxially arranged with ultrasonic mechanism. Thus, ultrasonic vibration can be applied to the molten pool during laser welding, thereby breaking the oxide and inclusion of the welding interface, promoting gas escape, and can inhibit pore formation, while it can enhance the convection of molten pool, make the interface material fully mixed, and avoid local segregation.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and specifically to a welding device. Background Technology

[0002] In related technologies, the battery's terminals, tabs, and connecting pieces require ultrasonic welding and laser penetration welding to ensure a reliable connection, achieving both high charging and high energy density while maintaining stability for high current flow. Current laser welding equipment is prone to porosity and incomplete fusion during the welding process, affecting weld quality. Utility Model Content

[0003] An embodiment of this utility model provides a welding device that can apply ultrasonic vibration to the molten pool during laser welding, thereby breaking up oxides and inclusions at the welding interface, promoting gas escape, inhibiting porosity formation, enhancing molten pool convection, ensuring thorough mixing of interface materials, and avoiding local segregation.

[0004] In a first aspect, embodiments of the present invention provide a welding apparatus, comprising: Ultrasonic apparatus; A laser welding mechanism is embedded in the ultrasonic mechanism and partially exposed outside the ultrasonic mechanism, wherein the laser welding mechanism and the ultrasonic mechanism are coaxially arranged.

[0005] This allows the welding equipment to apply ultrasonic vibration to the molten pool while performing laser welding on the workpiece. The ultrasonic vibration can instantly break up oxides and inclusions formed at the welding interface to promote gas escape and simultaneously suppress porosity formation. At the same time, the ultrasonic vibration can also enhance the convection of the molten pool, so that the materials at the welding interface are fully mixed and avoid phenomena such as local segregation.

[0006] In one embodiment, the coaxiality deviation between the ultrasonic mechanism and the laser welding mechanism is X, which satisfies: 0 ≤ X ≤ 0.05 mm.

[0007] This prevents imbalance of the molten pool during laser welding, avoids an increase in porosity defects, and ensures welding quality.

[0008] In one embodiment, the ultrasonic mechanism includes an ultrasonic vibrating head and an ultrasonic transducer, the ultrasonic transducer being connected to the ultrasonic vibrating head, and the laser welding mechanism being embedded in the ultrasonic transducer and coaxially arranged with the ultrasonic transducer.

[0009] This enables the simultaneous application of high-frequency ultrasonic vibration to the molten pool during laser welding.

[0010] In one embodiment, the ultrasonic vibrating head is connected to a protective gas channel, and the outlet of the protective gas channel faces the laser welding mechanism.

[0011] This prevents the weld from oxidizing.

[0012] In one embodiment, the protective gas channel is inclined toward the axis of the laser welding mechanism along the direction from the ultrasonic vibrating head to the ultrasonic transducer.

[0013] This ensures that the inert gas in the protective gas channel can act on the welding surface during laser welding.

[0014] In one embodiment, the tilt angle of the protective air channel is Y, which satisfies: 25°≤Y≤35°.

[0015] This ensures that the inert gas in the protective gas channel can act on the welding surface during laser welding.

[0016] In one embodiment, the protective gas passage is configured to deliver an inert gas.

[0017] This prevents oxidation of the weld seam formed by laser welding.

[0018] In one embodiment, the flow rate of the inert gas in the protective gas channel is Z, which satisfies: 15L / min≤Z≤25L / min.

[0019] This prevents unstable molten pool formation and avoids molten pool oxidation.

[0020] In one embodiment, the ultrasonic frequency of the ultrasonic mechanism is M, which satisfies: 20kHz≤M≤60kHz.

[0021] This prevents molten pool spatter and avoids insufficient welding capacity that could lead to mechanical properties failing to meet usage requirements.

[0022] In one embodiment, the ultrasonic amplitude of the ultrasonic mechanism is N, which satisfies: 5 micrometers ≤ N ≤ 30 micrometers.

[0023] This prevents depressions on the weld surface and avoids the weld interface from failing to fuse.

[0024] The beneficial effects of the embodiments of this utility model are as follows: In embodiments of this invention, a welding device is formed by an ultrasonic mechanism and a laser welding mechanism. This allows the welding device to apply ultrasonic vibration to the molten pool while performing laser welding on the workpiece. The ultrasonic vibration can instantly break up oxides and inclusions formed at the welding interface to promote gas escape and simultaneously suppress porosity formation. At the same time, the ultrasonic vibration can also enhance molten pool convection, allowing the materials at the welding interface to mix fully and avoiding phenomena such as local segregation. By setting the laser welding mechanism and the ultrasonic mechanism coaxially, the imbalance of molten pool disturbance during laser welding is avoided, the porosity defect rate is prevented from increasing, and the welding quality is ensured. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the welding equipment provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Ultrasonic mechanism; 11. Ultrasonic vibrating head; 12. Ultrasonic transducer; 2. Laser welding mechanism; 3. Protect the air passage. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0029] like Figure 1 As shown in the figure, this application embodiment also provides a welding device. The welding device includes an ultrasonic mechanism 1 and a laser welding mechanism 2. The laser welding mechanism 2 is embedded in the ultrasonic mechanism 1 and partially exposed outside the ultrasonic mechanism 1. The laser welding mechanism 2 and the ultrasonic mechanism 1 are coaxially arranged.

[0030] In this embodiment, a welding device is formed by an ultrasonic mechanism 1 and a laser welding mechanism 2. The welding device can apply ultrasonic vibration to the molten pool while performing laser welding on the workpiece to be welded. The ultrasonic vibration can instantly break up the oxides and inclusions formed at the welding interface to promote gas escape and simultaneously suppress the formation of pores. At the same time, the ultrasonic vibration can also enhance the convection of the molten pool, so that the materials at the welding interface are fully mixed and avoid phenomena such as local segregation. By setting the laser welding mechanism 2 and the ultrasonic mechanism 1 coaxially, the molten pool disturbance imbalance during laser welding is avoided, the pore defect rate is avoided, and the welding quality is ensured.

[0031] The laser welding mechanism 2 includes a laser fiber embedded in the ultrasonic transducer 12 of the ultrasonic mechanism 1. The laser fiber is used to transmit the laser generated by the laser generator and to direct the laser beam in a preset direction to the surface of the workpiece to be welded, thereby achieving laser penetration welding. A portion of the laser fiber is exposed outside the ultrasonic mechanism 1 so that the laser beam can be directed along the extension direction of the exposed portion of the laser fiber and act on the surface of the workpiece to be welded.

[0032] The ultrasonic mechanism 1 is used to simultaneously apply high-frequency ultrasonic vibration to the workpiece during the laser penetration welding process of the laser welding structure. After the high-frequency ultrasonic vibration is transmitted to the molten pool, it can immediately break up the interface oxides and inclusions and promote the escape of gas.

[0033] In some embodiments, the coaxiality deviation between the ultrasonic mechanism 1 and the laser welding mechanism 2 is X, which satisfies: 0 ≤ X ≤ 0.05 mm.

[0034] Understandably, ensuring that the coaxiality deviation between the ultrasonic mechanism 1 and the laser welding mechanism 2 is less than or equal to 0.05 mm can prevent imbalance of the molten pool during laser welding, avoid an increase in the porosity defect rate, and ensure welding quality. It can also prevent the ultrasonic effect from failing.

[0035] In some embodiments, the coaxiality deviation between the ultrasonic mechanism 1 and the laser welding mechanism 2 is 0, 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, or any value between the two.

[0036] In some embodiments, the ultrasonic mechanism 1 includes an ultrasonic vibrating head 11 and an ultrasonic transducer 12. The ultrasonic transducer 12 is connected to the ultrasonic vibrating head 11, and the laser welding mechanism 2 is embedded in the ultrasonic transducer 12 and is coaxially arranged with the ultrasonic transducer 12.

[0037] Understandably, after the ultrasonic generator emits a high-frequency electrical signal with a specific frequency and power, the ultrasonic transducer 12 can receive the high-frequency electrical signal and generate mechanical vibration. The ultrasonic vibration head 11 can transmit the mechanical vibration to the workpiece to be welded, so as to apply high-frequency ultrasonic vibration to the molten pool.

[0038] In some embodiments, a protective gas channel 3 is connected to the ultrasonic vibration head 11, and the outlet of the protective gas channel 3 faces the laser welding mechanism 2.

[0039] It is understandable that by setting a protective gas channel 3 on the ultrasonic vibrating head 11 and making the outlet of the protective gas channel 3 face the laser welding mechanism 2, protective gas can be output through the protective gas channel 3 during the laser welding process of the laser welding mechanism 2 to prevent the weld from oxidizing.

[0040] In some embodiments, the ultrasonic vibrating head 11 is cylindrical, and at least two protective air channels 3 are provided, spaced apart circumferentially along the ultrasonic vibrating head 11. The extension lines of the outlets of the at least two protective air channels 3 may intersect at a single point.

[0041] In some embodiments, along the direction from the ultrasonic vibrating head 11 to the ultrasonic transducer 12, the protective gas channel 3 is inclined toward the axis of the laser welding mechanism 2.

[0042] It is understandable that the protective gas channel 3 is tilted and tilted towards the axis of the laser welding mechanism 2 along the direction from the ultrasonic vibrating head 11 to the ultrasonic transducer 12, so that the outlet of the protective gas channel 3 can face the laser welding mechanism 2, ensuring that the inert gas in the protective gas channel 3 can act on the welding surface during the laser welding process.

[0043] In some embodiments, the tilt angle of the protective air passage 3 is Y, which satisfies: 25°≤Y≤35°.

[0044] It is understandable that the tilt angle of the protective gas channel 3 is set in the range of 25° to 35° so that the outlet of the protective gas channel 3 can face the laser welding mechanism 2, ensuring that the inert gas in the protective gas channel 3 can act on the welding surface during the laser welding process.

[0045] In some embodiments, the tilt angle of the protective air passage 3 is set to 25°, 28°, 30°, 32°, 35°, or any value between the two.

[0046] In some embodiments, the protective gas passage 3 is configured to deliver an inert gas.

[0047] Understandably, the protective gas channel 3 delivers inert gas to protect the laser welding process and prevent oxidation of the weld seam. Furthermore, the inert gas also prevents metal vapor and spatter from being ejected upwards during welding, thus avoiding damage to the ultrasonic mechanism 1 and the laser welding mechanism 2.

[0048] In some embodiments, the inert gas includes argon, helium, nitrogen, etc.

[0049] In some embodiments, the flow rate of the inert gas in the protective gas channel 3 is Z, which satisfies: 15L / min≤Z≤25L / min (liters per minute).

[0050] Understandably, the flow rate of the inert gas in the protective gas channel 3 is set in the range of 15 L / min to 25 L / min to prevent unstable molten pool formation and avoid molten pool oxidation.

[0051] If the flow rate of the inert gas in the protective gas channel 3 is less than 15 L / min, the inert gas flow rate is too low, which may cause the inert gas to fail to reach the laser welding location, or cause the inert gas to have a weak ability to disturb the airflow at the laser welding location, resulting in oxidation of the molten pool.

[0052] If the flow rate of the inert gas in the protective gas channel 3 is greater than 25 L / min, the excessive flow rate of the inert gas will easily cause the inert gas to exert too great a blowing force on the molten pool, making the molten pool formation unstable.

[0053] In some embodiments, the flow rate of the inert gas in the protective gas channel 3 is set to 15 L / min, 18 L / min, 20 L / min, 22 L / min, 25 L / min, or any value between the two.

[0054] In some embodiments, the ultrasonic frequency of the ultrasonic mechanism 1 is M, which satisfies: 20kHz≤M≤60kHz (kilohertz).

[0055] It is understandable that the ultrasonic frequency of the ultrasonic mechanism 1 is set in the range of 20kHz to 60kHz to prevent molten pool spatter and to avoid insufficient welding capacity that would prevent the mechanical properties from meeting the usage requirements.

[0056] If the ultrasonic frequency of ultrasonic mechanism 1 is less than 20kHz, it will result in insufficient ultrasonic vibration capability, causing the ultrasonic vibration to have a small impact on the molten pool, and the mechanical properties after laser welding will not meet the usage requirements.

[0057] If the ultrasonic frequency of ultrasonic mechanism 1 is greater than 60kHz, the ultrasonic vibration will have a greater impact on the molten pool, and may even cause molten pool spatter, affecting the welding quality. Furthermore, molten pool spatter into the welding equipment housing will cause damage to the welding equipment, and molten pool spatter into the core package will cause a short circuit in the core package.

[0058] In some embodiments, the ultrasonic frequency of the ultrasonic mechanism 1 is set to 20kHz, 30kHz, 40kHz, 50kHz, 60kHz, or any value between any two.

[0059] In some embodiments, the ultrasonic amplitude of the ultrasonic mechanism 1 is N, which satisfies: 5 micrometers ≤ N ≤ 30 micrometers.

[0060] It is understandable that the ultrasonic amplitude of the ultrasonic mechanism 1 is set in the range of 5 micrometers to 30 micrometers to prevent depressions on the weld surface and to avoid the weld interface from failing to fuse.

[0061] If the ultrasonic amplitude of ultrasonic mechanism 1 is less than 5 micrometers, it will result in insufficient ultrasonic vibration capability, and the ultrasonic vibration will have little effect on the molten pool, causing the welding interface to fail to fuse.

[0062] If the ultrasonic amplitude of ultrasonic mechanism 1 is greater than 30 micrometers, it will lead to excessive ultrasonic vibration capacity, causing the weld surface to become concave.

[0063] In some embodiments, the ultrasonic amplitude of the ultrasonic mechanism 1 is set to 5 micrometers, 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, or any value between any two.

[0064] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A welding device, characterized in that, include: Ultrasonic apparatus (1); A laser welding mechanism (2) is embedded in the ultrasonic mechanism (1) and partially exposed outside the ultrasonic mechanism (1), wherein the laser welding mechanism (2) and the ultrasonic mechanism (1) are coaxially arranged.

2. The welding equipment according to claim 1, characterized in that, The coaxiality deviation between the ultrasonic mechanism (1) and the laser welding mechanism (2) is X, which satisfies: 0≤X≤0.05 mm.

3. The welding equipment according to claim 1, characterized in that, The ultrasonic mechanism (1) includes an ultrasonic vibrating head (11) and an ultrasonic transducer (12). The ultrasonic transducer (12) is connected to the ultrasonic vibrating head (11). The laser welding mechanism (2) is embedded in the ultrasonic transducer (12) and is coaxially arranged with the ultrasonic transducer (12).

4. The welding equipment according to claim 3, characterized in that, The ultrasonic vibrating head (11) is connected to a protective gas channel (3), and the outlet of the protective gas channel (3) faces the laser welding mechanism (2).

5. The welding equipment according to claim 4, characterized in that, Along the direction from the ultrasonic vibrating head (11) to the ultrasonic transducer (12), the protective gas channel (3) is inclined toward the axis of the laser welding mechanism (2).

6. The welding equipment according to claim 5, characterized in that, The inclination angle of the protective gas channel (3) is Y, which satisfies: 25°≤Y≤35°.

7. The welding equipment according to claim 4, characterized in that, The protective gas channel (3) is configured to transport inert gas.

8. The welding equipment according to claim 7, characterized in that, The inert gas has a flow rate of Z in the protective gas channel (3), which satisfies: 15L / min≤Z≤25L / min.

9. The welding equipment according to any one of claims 1 to 8, characterized in that, The ultrasonic frequency of the ultrasonic mechanism (1) is M, which satisfies: 20kHz≤M≤60kHz.

10. The welding equipment according to any one of claims 1 to 8, characterized in that, The ultrasonic amplitude of the ultrasonic mechanism (1) is N, which satisfies: 5 micrometers ≤ N ≤ 30 micrometers.

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