Ultrasonic torsional vibration assembly and welding equipment
By designing an ultrasonic torsional vibration assembly and utilizing the synergistic design of an acoustic rod, drive arm, adjustment arm, torsion bar, and amplitude transformer, the problem of abnormal vibration modes in torsional welding was solved, thereby improving the stability and effectiveness of the welding process.
Patent Information
- Application Number
- CN202423313495.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing torsion welding assemblies are prone to abnormal vibration modes under unilateral linear vibration excitation, resulting in unstable welding and poor welding performance.
Design an ultrasonic torsional vibration component, including an acoustic rod, a drive swing arm, an adjusting swing arm, a torsion bar, and an amplitude transformer. By asymmetrically arranged adjusting and drive swing arms, the swing mode is adjusted to achieve torsional vibration. Through the coordinated design of these components, the vibration mode is adjusted and optimized.
The stability of the vibration modes was achieved, which improved the stability and effect of welding, avoided abnormal vibration modes, and ensured the stability and effect of welding.
Smart Images
Figure CN223889144U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ultrasonic welding technology, specifically relating to an ultrasonic torsional vibration component and welding equipment. Background Technology
[0002] Ultrasonic welding is a method that uses high-frequency ultrasonic vibrations to transmit to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects rub against each other, forming a fusion between molecular layers. As an energy-saving and environmentally friendly technology, ultrasonic welding has been widely used in welding processes for metals, plastics, and other materials.
[0003] Currently, in applications such as PIN welding or ring-shaped bar welding, torsion welding is required. Ultrasonic torsion welding uses high-frequency circumferential vibration of the welding head to weld the workpiece into shape. The inventors have discovered that existing torsion welding components have at least the following technical problems in practical applications: During the torsion welding process, when using unilateral linear vibration to excite torsion vibration, abnormal vibration modes are prone to occur due to the asymmetry of the component, leading to unstable welding and poor welding results.
[0004] Therefore, it is necessary to improve upon the shortcomings of existing technologies in order to overcome their deficiencies in practical applications. Utility Model Content
[0005] Based on the aforementioned shortcomings and deficiencies in the prior art, one of the objectives of this utility model is to at least solve one or more of the aforementioned problems in the prior art. In other words, one of the objectives of this utility model is to provide an ultrasonic torsional vibration component and welding equipment that meets one or more of the aforementioned requirements.
[0006] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:
[0007] This utility model provides an ultrasonic torsional vibration assembly, including an acoustic rod, a drive swing arm, an adjusting swing arm, a torsion rod, an amplitude transformer, and a connector. The drive swing arm and the adjusting swing arm are respectively connected to both sides of the acoustic rod. The drive swing arm is located between the acoustic rod and the torsion rod. One end of the torsion rod is connected to the amplitude transformer, and the other end is configured as a welding working surface or a welding head. The amplitude transformer is connected to the connector.
[0008] The acoustic rod has a linear vibration mode, while the torsion rod and the amplitude rod have torsional vibration modes.
[0009] As a preferred embodiment, the adjusting arm and the driving arm are respectively connected to both sides of the acoustic rod and are arranged asymmetrically.
[0010] As a preferred embodiment, the volume of the adjusting swing arm is smaller than the volume of the driving swing arm.
[0011] As a preferred embodiment, the length of the acoustic rod is configured to be an integer multiple of half the wavelength.
[0012] As a preferred embodiment, the acoustic rod is arranged perpendicular to the torsion rod.
[0013] As a preferred embodiment, the drive arm is positioned at the antinode of the linear vibration mode of the acoustic rod.
[0014] As a preferred embodiment, the adjusting swing arm and the driving swing arm are respectively connected to both sides of the acoustic rod and are arranged symmetrically.
[0015] As a preferred embodiment, the torsion bar and the amplitude transformer resonate at the torsional vibration mode frequency; the amplitude transformer includes a first segment and a second segment, the first segment is connected to the torsion bar, the second segment is connected to the connector, the diameter of the first segment is smaller than the diameter of the torsion bar and the second segment, and the length of the amplitude transformer is configured to be an integer multiple of half the wavelength.
[0016] As a preferred embodiment, the acoustic rod, the drive swing arm, the adjustment swing arm, and the torsion bar are configured as a single unit.
[0017] This utility model also provides an ultrasonic welding device, including an ultrasonic torsional vibration assembly and a transducer as described in any of the above embodiments, wherein the transducer is connected to the acoustic rod.
[0018] Compared with the prior art, the advantages of this utility model are:
[0019] This invention provides an ultrasonic torsional vibration component. When torsional vibration is excited by unilateral linear vibration, the configured adjustment arm can ensure the normalization of the vibration mode, avoid abnormal vibration mode phenomena, improve welding stability, and effectively guarantee the welding effect.
[0020] This invention provides an ultrasonic torsional vibration assembly with a reasonable and simple structural design, low production cost, and convenient installation, thus possessing superior practicality. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of 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 embodiments can be obtained from these drawings without creative effort.
[0022] Figure 1This is a schematic diagram of the structure of the ultrasonic torsional vibration assembly according to an embodiment of the present invention;
[0023] Figure 2 This is a side view of the ultrasonic torsional vibration assembly according to an embodiment of the present invention;
[0024] Figure 3 This is another structural schematic diagram of the ultrasonic torsional vibration assembly according to an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram showing the connection between the ultrasonic torsional vibration component and the transducer according to an embodiment of the present invention;
[0026] In the diagram: 1 Acoustic rod, 2 Drive swing arm, 3 Adjusting swing arm, 4 Torsion bar, 5 Amplitude bar, 51 First segment, 52 Second segment, 6 Connector, 7 Transducer. Detailed Implementation
[0027] To more clearly illustrate the embodiments of this application, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.
[0028] In the description of the embodiments of this application, the terms "upper," "lower," "front," "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the application. In addition, the terms "first," "second," etc., are only used for distinction in description and have no special meaning.
[0029] In applications such as PIN pin welding or ring bar welding, torsion welding is required. During torsion welding, when torsion vibration is excited by unilateral linear vibration, abnormal vibration modes are likely to occur due to the asymmetry of the components, resulting in unstable welding and poor welding effect.
[0030] To solve the above technical problems, such as Figures 1 to 3As shown, according to some embodiments of this application, an ultrasonic torsional vibration assembly is provided, including an acoustic rod 1, a drive swing arm 2, an adjusting swing arm 3, a torsion bar 4, an amplitude transformer 5, and a connector 6. The drive swing arm 2 and the adjusting swing arm 3 are respectively connected to both sides of the acoustic rod 1. The drive swing arm 2 is disposed between the acoustic rod 1 and the torsion bar 4. One end of the torsion bar 4 is connected to the amplitude transformer 5, and the other end is configured as a welding working surface or a welding head. The amplitude transformer 5 is connected to the connector 6. The acoustic rod 1 has a linear vibration mode, and the torsion bar 4 and the amplitude transformer 5 have torsional vibration modes.
[0031] Specifically, the adjusting arm 3 and the driving arm 2 are respectively connected to the two sides of the acoustic rod 1 and are arranged asymmetrically. The volume of the adjusting arm 3 is smaller than that of the driving arm 2. Since a torsion bar 4 is connected to one side of the driving arm 3, it will affect the vibration mode of the acoustic rod 2. By configuring the adjusting arm 1, the vibration on the acoustic rod 1 can be adjusted so that the vibration mode returns to the ideal state and ensures the stability of the vibration mode.
[0032] Furthermore, the linear vibration of the acoustic rod 1 will drive the adjusting arm 3 and the driving arm 2 to produce bending vibration. The vibration of the driving arm 2 is along the tangential direction of the torsion rod 4, thereby driving the torsion rod 4 to produce torsional vibration around the axis.
[0033] In some embodiments, the length of the acoustic rod 1 is configured to be an integer multiple of half a wavelength, such as... Figure 1 As shown, the length of acoustic rod 1 can be configured for the entire wavelength, such as... Figure 3 As shown, the length of acoustic rod 1 can also be configured as half a wavelength. The length of acoustic rod 1 can be set according to actual needs and is not limited to the length limitation mentioned above.
[0034] Since the energy generated at the antinode is the greatest during ultrasonic vibration propagation, in order to ensure the welding effect of the torsion bar 4, the drive arm 2 is set at the antinode of the linear vibration mode of the acoustic bar 1.
[0035] In some embodiments, the acoustic rod 1 and the torsion rod 4 are arranged perpendicularly, and the linear vibration of the acoustic rod 1 is converted into the torsional vibration of the torsion rod 4 by driving the swing arm 3. Figure 1 As shown, the acoustic rod 1 vibrates linearly in the direction indicated by arrow a, and is transmitted to the torsion rod 4 through the driving swing arm 2, so that the torsion rod 4 vibrates in the direction indicated by arrow b at a high frequency to output energy to the workpiece to be welded.
[0036] In some embodiments, the adjusting arm 3 and the driving arm 2 are respectively connected to both sides of the acoustic rod 1 and arranged symmetrically. Through the symmetrical structural arrangement, the stability of the vibration mode transmission of the acoustic rod 2 can be guaranteed.
[0037] In some embodiments, the acoustic rod 1 is configured as a cuboid structure to transmit linear vibrations. The acoustic rod 1 can also be configured as a cylindrical structure, a variable cross-section structure, or other regular structures, depending on actual needs.
[0038] In some embodiments, the torsion bar 4 and the amplitude transformer 5 resonate at the torsional vibration mode frequency. The amplitude transformer 5 includes a first segment 51 and a second segment 52. The first segment 51 is connected to the torsion bar 4, and the second segment 52 is connected to the connector 6. The diameter of the first segment 51 is smaller than the diameters of the torsion bar 4 and the second segment 52. The length of the amplitude transformer 5 is configured to be an integer multiple of half the wavelength.
[0039] Furthermore, the torsional vibration of the torsion bar 4 is significantly attenuated after passing through the amplitude transformer 5. The connection position between the first segment 51 and the second segment 52 of the amplitude transformer 5 is the acoustic node 33 (with the smallest amplitude) of the amplitude transformer 4. This allows for more significant attenuation when the vibration is transmitted from the first segment 51 to the second segment 52. After the vibration is attenuated by the amplitude transformer 5, the vibration is further attenuated when it is transmitted to the connector 6, resulting in very weak vibration of the connector 6. The connector 6 can then be directly used for clamping and fixing.
[0040] In some embodiments, the acoustic rod 1, drive arm 2, adjustment arm 3, and torsion bar 4 are configured as a single unit, meaning that the acoustic rod 1, drive arm 2, adjustment arm 3, and torsion bar 4 are integral structures formed from the same blank or raw material through integral molding processes including but not limited to machining, casting, or additive manufacturing.
[0041] like Figure 4 As shown, according to some embodiments of this application, an ultrasonic welding device is also provided, including the above-mentioned ultrasonic torsional vibration component and transducer 7. The transducer 7 is connected to one end of the acoustic rod 1, and can apply uniform pressure along the axial direction during the welding process, thereby effectively improving the welding effect. The structure is reasonable and simple, the production cost is low and the installation is convenient. It can meet the requirements of low amplitude and high power metal welding applications and avoid practical problems such as ultrasonic incomplete welding or weld breakage.
[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0043] The above description is only a detailed explanation of the preferred embodiments and principles of this application. For those skilled in the art, there may be changes in the specific implementation methods based on the ideas provided in this application, and these changes should also be considered within the scope of protection of this application.
Claims
1. An ultrasonic torsional vibration assembly, characterized in that, The device includes an acoustic rod, a drive swing arm, an adjusting swing arm, a torsion bar, an amplitude transformer, and a connector. The acoustic rod is connected to the drive swing arm and the adjusting swing arm on both sides, respectively. The drive swing arm is located between the acoustic rod and the torsion bar. One end of the torsion bar is connected to the amplitude transformer, and the other end is configured as a welding working surface or a welding head. The amplitude transformer is connected to the connector. The acoustic rod has a linear vibration mode, while the torsion rod and the amplitude rod have torsional vibration modes.
2. The ultrasonic torsional vibration assembly according to claim 1, characterized in that, The adjusting arm and the driving arm are respectively connected to both sides of the acoustic rod and are arranged asymmetrically.
3. The ultrasonic torsional vibration assembly according to claim 1, characterized in that, The volume of the adjusting swing arm is smaller than the volume of the driving swing arm.
4. The ultrasonic torsional vibration assembly according to claim 1, characterized in that, The length of the acoustic rod is configured to be an integer multiple of half the wavelength.
5. An ultrasonic torsional vibration assembly according to claim 1, characterized in that, The acoustic rod is arranged perpendicular to the torsion rod.
6. An ultrasonic torsional vibration assembly according to claim 1, characterized in that, The drive arm is positioned at the antinode of the linear vibration mode of the acoustic rod.
7. An ultrasonic torsional vibration assembly according to claim 1, characterized in that, The adjusting swing arm and the driving swing arm are respectively connected to both sides of the acoustic rod and are arranged symmetrically.
8. An ultrasonic torsional vibration assembly according to claim 1, characterized in that, The torsion bar and the amplitude transformer resonate at the torsional vibration mode frequency; the amplitude transformer includes a first segment and a second segment, the first segment is connected to the torsion bar, the second segment is connected to the connector, the diameter of the first segment is smaller than the diameter of the torsion bar and the second segment, and the length of the amplitude transformer is configured to be an integer multiple of half the wavelength.
9. An ultrasonic torsional vibration assembly according to claim 1, characterized in that, The acoustic rod, the drive swing arm, the adjustment swing arm, and the torsion bar are configured as a single unit.
10. An ultrasonic welding device, characterized in that, It includes an ultrasonic torsional vibration assembly as described in any one of claims 1 to 9 and a transducer, the transducer being connected to the acoustic rod.