Ultrasonic welding equipment

Abstract

The utility model discloses ultrasonic welding equipment, which relates to the technical field of ultrasonic welding and comprises a wave generating assembly and a welding assembly. The wave generating assembly is used for generating ultrasonic waves; the welding assembly comprises a welding head and a welding seat, the welding head is connected with the wave sending assembly, the welding head is of a bent structure and used for changing the transmission direction of ultrasonic waves, and the welding seat and the welding head are arranged in a matched mode so as to conduct ultrasonic welding on the tabs through the ultrasonic waves. Due to the fact that the transmission direction of the ultrasonic waves is changed, vibration generated by the ultrasonic waves can be perpendicular to the extending direction of the tabs in the welding process, and therefore the vibration is emitted to the outside after passing through the tabs, position deviation of the tabs cannot be generated, and the tabs are prevented from arching or being broken.

Description

Technical Field

[0001] This application relates to the technical field of ultrasonic welding, and particularly to an ultrasonic welding device. Background Art

[0002] Ultrasonic welding is a fast, clean, and effective assembly process. Its working principle is to transmit ultrasonic energy through the upper welding part to the welding area. Since the acoustic resistance is large at the welding area, that is, the interface between the two welds, local high temperature will be generated. Also, due to the poor thermal conductivity of plastics, it cannot be dissipated in time for a while and accumulates in the welding area, causing the contact surfaces of the two plastics to melt rapidly. With a certain pressure applied, they are fused into one body. When the ultrasonic wave stops acting, the pressure is maintained and there is a little holding pressure time to make it solidify and form, thus forming a strong molecular chain to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material body.

[0003] The utility model patent publication number CN210612627U discloses an ultrasonic welding device, including: a welding head for transmitting ultrasonic energy, with a first welding surface at one end of the welding head, and a plurality of welding teeth arranged at intervals on the first welding surface; a welding seat arranged opposite to the welding head for carrying the workpiece to be welded, with a second welding surface at the end of the welding seat facing the welding head, and the second welding surface having an irregular concave-convex texture structure, and the maximum depth of the concave-convex texture structure is less than the height of the welding teeth; the welding head is controlled to move in the directions close to and away from the welding seat; a resistance welding power supply for applying a direct current to the welding head and the welding seat; this application completes the welding of the workpiece to be welded under the action of resistance heat and ultrasonic high-frequency vibration by applying a direct current, effectively improving the welding ability of ultrasonic welding. However, since the vibration generated by the welding head during the welding process will cause the position of the tab to shift, if the shift of the tab is blocked in the sound wave transmission direction, it is easy to arch the tab at the blocking position during the ultrasonic welding process, and even cause the tab to break, which is not conducive to the smooth progress of the tab welding process. Summary of the Invention

[0004] In order to solve the problem that the position of the tab shifts due to the transmission of sound waves during the ultrasonic processing process, which in turn leads to the arching and even breaking of the tab, this application provides an ultrasonic welding device.

[0005] The ultrasonic welding device provided by this application adopts the following technical solutions:

[0006] An ultrasonic welding device includes:

[0007] A wave generating component for generating ultrasonic waves;

[0008] A welding component including a welding head and a welding seat, the welding head is connected to the wave generating component, the welding head is a bent structure for changing the transmission direction of ultrasonic waves, and the welding seat is arranged in cooperation with the welding head to perform ultrasonic welding on the tab by using ultrasonic waves.

[0009] By adopting the above technical solution, a bent component is used on the transmission path of ultrasonic waves, so that the ultrasonic waves generated by the wave generating component change the transmission direction in the welding head, thereby changing the vibration direction of the welding head, making the vibration direction perpendicular to the length direction of the tab. Due to the change in the ultrasonic vibration direction relative to the tab, the position offset direction of the tab caused by the vibration during welding of the welding head also changes. The processing equipment for the tab is relatively heavy. If the relative position of the equipment is changed, the equipment modification is large. The bent welding head can conveniently change the direction of vibration transmission. There is no tab glue in the direction perpendicular to the length of the tab, nor is there any position obstruction. The tab material is uniform. The vibration is transmitted from the edge of the tab to the air, avoiding the situation where the vibration causes the tab to arch or even break.

[0010] Optionally, the wave generating component includes a transducer and a horn. The transducer is connected to the horn, and the horn is connected to the welding head. The transducer is used to generate ultrasonic waves, and the horn is used to adjust the amplitude and frequency of the ultrasonic waves.

[0011] By adopting the above technical solution, the transducer can convert an energy source such as electric energy into vibration through means such as a magnetic field, thereby generating ultrasonic waves. The horn can adjust the vibration frequency of the ultrasonic waves generated by the transducer. According to different materials for ultrasonic welding and the vibration consumed by the welding head, the vibration frequency of the ultrasonic waves is adjusted, enabling the welding equipment to have a larger processing range and improving the applicability of the welding equipment.

[0012] Optionally, the bending angle of the welding head is 90°.

[0013] By adopting the above technical solution, since the normal vibration conduction direction of the welding equipment is the same as the direction of the tab, by setting the bending angle to 90°, the vibration can be transmitted to the tab in a direction perpendicular to the extension direction of the tab, and while maintaining ultrasonic welding, the vibration can be transmitted out from the side of the tab.

[0014] Optionally, the edge of the welding head is a smooth rounded corner structure.

[0015] By adopting the above technical solution, during the transmission of ultrasonic waves in the welding head, the ultrasonic waves will be consumed due to the vibration of the edge corners. By setting it to a smooth rounded corner structure, the loss of ultrasonic waves can be reduced and the energy utilization rate can be improved.

[0016] Optionally, it further includes a fixing component. The fixing component includes a horn fixing part and an origin support part. The horn fixing part is sleeved outside the horn, and the origin support part is connected to the horn fixing part and fixedly connected to the welding head.

[0017] By adopting the above technical solution, the fixing component is used to support and fix the horn component and the welding component. The horn and the welding head are fixedly connected through the horn fixing piece and the origin support piece, ensuring the stability of ultrasonic wave transmission.

[0018] Optionally, the shape of the origin support piece corresponds to that of the welding head. The origin support piece is connected with a connecting piece, and the connecting piece is connected with the welding head.

[0019] By adopting the above technical solution, the shape of the origin support piece corresponds to that of the welding head, so that it can form a connection and fixation with the welding head at multiple points. The welding head is a component for transmitting ultrasonic waves and changing the direction of ultrasonic waves, which requires stable fixation. Through the connecting piece, the connection degree between the welding head and the origin support piece can be adjusted to avoid the consumption of ultrasonic waves.

[0020] Optionally, the fixing component further includes a connecting piece, which is arranged outside the horn fixing piece and is connected with the origin support piece. The connecting piece is provided with a first connecting hole for connecting and fixing the fixing component on an external structure.

[0021] By adopting the above technical solution, the connecting piece is respectively connected with the horn fixing piece and the origin support piece, strengthening the connection degree between the two, thus ensuring the stable connection between the horn and the welding head. By providing the first connecting hole, the connecting piece can be connected with an external device, so as to be used for fixing the welding device.

[0022] Optionally, the end of the origin support piece far from the connecting piece is provided with a second connecting hole for fixing at the end of the origin support piece.

[0023] By adopting the above technical solution, the second connecting hole is also used to connect an external device. When the welding device is connected to an external device, if only fixed through the connecting piece, it will cause a large load on the connecting piece, and the origin support piece will consume part of the vibration. By connecting the other side of the origin support piece through the second connecting hole, the stability of the welding head can be maintained, vibration loss can be avoided, and the stability of the welding device can be improved.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Since the welding head adopts a bent structure, ultrasonic waves are transmitted in the direction of the welding head and continue to be transmitted to the welding head. The welding head cooperates with the welding seat to weld the tab using ultrasonic waves. Since the transmission direction of the ultrasonic waves changes, during the welding process, the vibration generated by the ultrasonic waves can be perpendicular to the extending direction of the tab, so that the vibration is dissipated to the outside after passing through the tab, and will not cause the tab to shift in position, avoiding the tab from arching or breaking;

[0026] 2. During the transmission of ultrasonic waves in the welding head, ultrasonic waves will be consumed due to the vibration of the edge corners. By setting it as a smooth rounded corner structure, ultrasonic wave loss can be reduced and the energy utilization rate can be improved;

[0027] 3. The fixing component is used to support and fix the wave generating component and the welding component. The horn and the welding head are fixedly connected through the horn fixing piece and the origin support piece, ensuring the stability of ultrasonic transmission and avoiding vibration loss. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the structures of the wave generating component and the welding component of an embodiment of the present application.

[0030] Reference signs: 1, wave generating component; 11, transducer; 12, horn; 2, welding component; 21, welding head; 22, welding seat; 3, fixing component; 31, horn fixing piece; 32, origin support piece; 33, connecting piece; 34, connecting plate; 35, first connecting hole; 36, second connecting hole. Detailed Embodiment

[0031] The following further describes the present application in detail with reference to the accompanying drawings.

[0032] An ultrasonic welding device, referring to Figure 1 , includes a wave generating component 1, a welding component 2 and a fixing component 3. The wave generating component 1 is used to generate ultrasonic waves. The welding component 2 is connected to the wave generating component 1 and uses the ultrasonic waves generated by the wave generating component 1 for ultrasonic welding. The fixing component 3 respectively fixes the wave generating component 1 and the welding component 2 to ensure the stability of their connection and can be connected to external devices for installing and fixing the welding device.

[0033] Referring to Figure 2 , the wave generating component 1 includes a transducer 11 and a horn 12. The transducer 11 is connected to the horn 12 and is used to generate ultrasonic waves, while the horn 12 is used to adjust the ultrasonic frequency. The welding component 2 includes a welding head 21 and a welding seat 22. The welding head 21 is an arc-shaped bending structure with a bending angle of 90° and is used to change the transmission direction of ultrasonic waves. The edge of the welding head 21 is designed as a smooth rounded corner structure to reduce ultrasonic loss and improve welding efficiency. The welding seat 22 is arranged below the welding head 21, and two tab ears are stacked between the welding head 21 and the welding seat 22. Under the action of ultrasonic waves, the welding head 21 generates local high temperature on the surface of the tab ears, thereby welding the two tab ears into one body. By using the welding head 21, the vibration direction generated by the ultrasonic waves is perpendicular to the extension direction of the tab ears. After the vibration passes through the tab ears, it is transmitted to the outside without causing the tab ears to arch or break due to position deviation.

[0034] Referring to Figure 1, the fixing assembly 3 includes a horn fixing member 31, an origin support member 32, and a connecting piece 34. The horn fixing member 31 is sleeved outside the horn 12. The origin support member 32 is connected to the horn fixing member 31 and fixedly connected to the welding head 21 at one end away from the horn fixing member 31. The shape of the origin support member 32 corresponds to that of the welding head 21, so that a connecting member 33 can be provided on the origin support member 32. The connecting member 33 provides an additional connection between the origin support member 32 and the welding head 21, maintains the stability of the welding head 21, and reduces the consumption of ultrasonic waves. The connecting piece 34 is disposed above the horn fixing member 31 and on one side of the origin support member 32 close to the connecting piece 34, and is connected to the horn fixing member 31 and the connecting piece 34 together, thereby improving the connection stability between the origin support member 32 and the horn fixing member 31. The connecting piece 34 is provided with a first connecting hole 35 for connecting and fixing the fixing assembly 3 on an external structure, so as to conveniently fix the entire device on a workbench or other required positions. The first connecting hole 35 is for a bolt or other connecting member 33 to fix the entire device on the workbench. This design makes the installation and disassembly of the device simpler and faster, and also improves the stability and safety of the device during use. One end of the origin support member 32 away from the horn fixing member 31 is provided with a second connecting hole 36. The second connecting hole 36 can also connect the other side of the origin support member 32 to an external device, maintain the stability of the welding head 21, avoid vibration loss, and improve the stability of the welding device.

[0035] The implementation principle of the embodiment of the present application is as follows: The transducer 11 generates ultrasonic waves, which are adjusted by the horn 12 and then transmitted to the welding head 21. Since the welding head 21 adopts a bent structure, the ultrasonic waves are in the transmission direction of the welding head 21 and continue to be transmitted to the welding head 21. The welding head 21 cooperates with the welding seat 22 to weld the tab by using ultrasonic waves. Since the transmission direction of the ultrasonic waves changes, during the welding process, the vibration generated by the ultrasonic waves can be perpendicular to the extending direction of the tab, so that the vibration is dissipated to the outside after passing through the tab and will not cause the tab to shift in position, avoiding the tab from arching or breaking.

[0036] The embodiments of the present specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An ultrasonic welding device, characterized in that, Comprising: A wave generating component (1) for generating ultrasonic waves; A welding component (2) including a welding head (21) and a welding base (22), the welding head (21) being connected to the wave generating component (1), the welding head (21) being of a bent structure for changing the transmission direction of ultrasonic waves, and the welding base (22) being arranged in cooperation with the welding head (21) to perform ultrasonic welding on the tab by using ultrasonic waves.

2. An ultrasonic welding device according to claim 1, characterized in that, The wave generating component (1) includes a transducer (11) and a horn (12), the transducer (11) being connected to the horn (12), the horn (12) being connected to the welding head (21), the transducer (11) being used for generating ultrasonic waves, and the horn (12) being used for adjusting the amplitude and frequency of ultrasonic waves.

3. An ultrasonic welding device according to claim 1, characterized in that, The bending angle of the welding head (21) is 90°.

4. An ultrasonic welding device according to claim 1, characterized in that, The edge of the welding head (21) is a smooth rounded corner structure.

5. An ultrasonic welding device according to claim 2, characterized in that It further includes a fixing component (3), the fixing component (3) including a horn fixing member (31) and an origin support member (32), the horn fixing member (31) being sleeved outside the horn (12), and the origin support member (32) being connected to the horn fixing member (31) and fixedly connected to the welding head (21).

6. An ultrasonic welding device according to claim 5, wherein, The shape of the origin support member (32) corresponds to that of the welding head (21), the origin support member (32) being connected with a connecting member (33), and the connecting member (33) being connected to the welding head (21).

7. An ultrasonic welding device according to claim 5, characterized in that, The fixing component (3) further includes a connecting piece (34), the connecting piece (34) being arranged outside the horn fixing member (31) and connected to the origin support member (32), and a first connecting hole (35) being provided on the connecting piece (34) for connecting the fixing component (3) to an external structure.

8. An ultrasonic welding device according to claim 7, characterized in that A second connecting hole (36) is provided at one end of the origin support member (32) away from the connecting piece (34) for fixing at the end of the origin support member (32).

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