Novel ultrasonic welding head and welding assembly
By optimizing the structure of the ultrasonic welding head and using a first welding head and multiple vertically arranged second welding heads for resonant welding, the problem of welding large-sized workpieces was solved, achieving efficient and stable welding results and reducing costs.
Patent Information
- Application Number
- CN202520316621.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In existing technologies, welding large workpieces requires multiple devices or extra-large welding heads, which leads to driving difficulties, welding failures, and the difficulty in achieving continuous and uninterrupted welds, resulting in high costs.
A novel ultrasonic welding head is designed, comprising a first welding head and multiple second welding heads, which are arranged vertically and resonate with each other, and their natural frequencies are coupled. The welding head structure is optimized to achieve multi-frequency resonance. The welding position is set at the antinode of the vibration mode and is connected by mounting bolts for easy disassembly and installation.
It enables efficient operation under various welding conditions, improves welding stability and continuity, reduces energy consumption, lowers manufacturing costs, and enhances the flexibility and service life of the equipment.
Smart Images
Figure CN223819828U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to ultrasonic welding technical field, concretely relates to a novel ultrasonic welding head and welding assembly. BACKGROUND
[0002] The working principle of the ultrasonic welding machine is that a high-frequency electric signal is generated by an ultrasonic generator, the electric signal is converted into high-frequency mechanical vibration by a transducer, and the high-frequency vibration acts on the workpiece to be welded. When welding a plastic workpiece, the surface and internal molecules of the plastic workpiece are caused to generate heat by friction. When the temperature reaches the melting point of the plastic, the workpiece interface rapidly melts. Subsequently, the melted plastic fills the gap between the interfaces and fuses together under a certain pressure. When the vibration stops, the pressure is continuously applied to cool and solidify the welded part, thereby completing the welding.
[0003] For welding of large-sized workpieces, the prior art requires simultaneous welding by two or more devices, or the design of an oversized mother-son welding head. As shown in Figure 5 and Figure 6 , the mother welding head 61 is attached to multiple son welding heads 62, but when the mother welding head 61 exceeds a certain size, the ultrasonic system has difficulty driving the mother welding head 61 and the son welding heads 62 to work normally, resulting in welding failure. In addition, when multiple son welding heads 62 are installed side by side at the bottom of the mother welding head 61, a gap A needs to be reserved between the son welding heads 61. When the workpiece requires high-quality welding without discontinuities, effective welding is difficult to achieve, and there is a certain limitation. At the same time, the existing design has a high manufacturing cost.
[0004] Therefore, it is necessary to improve the defects in the prior art to overcome the deficiencies in actual application. SUMMARY
[0005] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the utility model is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the purposes of the utility model is to provide a novel ultrasonic welding head and welding assembly that meets one or more of the above-mentioned needs.
[0006] In order to achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:
[0007] The utility model provides a novel ultrasonic welding head, which comprises a first welding head and a second welding head, a plurality of second welding heads are arranged side by side and detachably mounted at the end of the first welding head, and the first welding head and the second welding head are arranged vertically. The natural frequency of the first welding head is coupled with the natural frequency of the second welding head and resonates under the action of an ultrasonic vibration source. The first welding head and the second welding head have a vibration mode, and the first welding head and the second welding head each comprise at least one acoustic node.
[0008] As a preferred embodiment, the connection between the first welding head and the second welding head is located at the antinode position in the vibration mode of the first welding head.
[0009] As a preferred embodiment, the end of the second welding head is provided with a welding position, which is located at the antinode position in the vibration mode of the second welding head.
[0010] As a preferred embodiment, the length of the first welding head in the longitudinal direction is an integer multiple of half a wavelength and includes at least one acoustic node.
[0011] As a preferred embodiment, the length of the second welding head in the longitudinal direction is an integer multiple of half the wavelength and includes at least one acoustic node.
[0012] As a preferred embodiment, each of the second welding heads has a mounting position in its middle portion, and the mounting position is used to connect the second welding head to the first welding head by mounting bolts.
[0013] As a preferred embodiment, the first welding head is provided with a plurality of first vibration grooves, which are distributed along the longitudinal direction of the first welding head.
[0014] As a preferred embodiment, the second welding head is provided with several second vibration grooves, which are distributed along the longitudinal direction of the second welding head.
[0015] As a preferred embodiment, the first welding head is arranged along a first direction, and the second welding head is arranged along a second direction, with the first direction and the second direction intersecting perpendicularly.
[0016] This utility model also provides an ultrasonic welding assembly, including a transducer, an amplitude modulator, and a first welding head and a second welding head as described in any of the above embodiments, wherein the transducer is connected to the amplitude modulator, and the amplitude modulator is connected to the first welding head.
[0017] Compared with the prior art, the advantages of this utility model are:
[0018] This invention provides a novel ultrasonic welding head. By rationally matching the inherent frequencies of the first and second welding heads, multi-band resonance is achieved, ensuring efficient operation under various welding conditions. The overall structure is simple, lightweight, and easy to install and disassemble, improving the flexibility and service life of the overall device. It is suitable for various welding scenarios and meets the needs of different users. By optimizing the welding head structure, the welding surface of the second welding head is continuous without breaks, effectively reducing energy loss and improving welding stability. Attached Figure Description
[0019] 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.
[0020] Figure 1 This is a schematic diagram of the overall structure of an ultrasonic welding assembly according to an embodiment of the present invention;
[0021] Figure 2 This is an exploded view of an ultrasonic welding assembly according to an embodiment of the present invention;
[0022] Figure 3 This is a schematic diagram of the vibration modes of an ultrasonic welding head according to an embodiment of the present invention;
[0023] Figure 4 This is a schematic diagram of the structure of the first welding head according to an embodiment of the present invention;
[0024] Figure 5 This is a schematic diagram of the structure of an ultrasonic welding head in the prior art;
[0025] Figure 6 yes Figure 5 Side view;
[0026] In the figure: 1 First welding head, 11 First vibration groove, 2 Second welding head, 21 Second vibration groove, 22 Welding position, 23 Mounting position, 3 Bolt, 4 Transducer, 5 Amplitude modulator, S1 Vibration mode, S2 Vibration mode, P Acoustic node. 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] According to some embodiments of this application, such as Figures 1 to 4As shown, a novel ultrasonic welding head is provided, including a first welding head 1 and a second welding head 2. Several second welding heads 2 are configured and arranged in parallel and detachably installed at the end of the first welding head 1. The first welding head 1 and the second welding head 2 are arranged perpendicularly. The natural frequency of the first welding head 1 is coupled with the natural frequency of the second welding head 2 and resonates under the action of the ultrasonic source. The first welding head 1 and the second welding head 2 have vibration modes. Both the first welding head 1 and the second welding head 2 contain at least one acoustic node P.
[0030] In some embodiments of this application, the connection between the first welding head 1 and the second welding head 2 is located at an antinode in the vibration mode S1 of the first welding head 1. By connecting at the antinode, the vibration energy on the second welding head 2 is enhanced, further improving the welding strength of the second welding head 2 during the welding process.
[0031] In some embodiments of this application, the end of the second welding head 2 is provided with a welding position 22. The welding position 22 is located at the antinode position in the vibration mode S2 of the second welding head 2, which can maximize the vibration energy of the welding position 22 and ensure the welding strength and uniformity.
[0032] In some embodiments of this application, the first welding head 1 has a length in the longitudinal direction that is an integer multiple of half a wavelength and includes at least one acoustic node, which can effectively transmit vibration to the second welding head 2. The second welding head 2 has a length in the longitudinal direction that is an integer multiple of half a wavelength and includes at least one acoustic node, which enables the end of the second welding head 2 (i.e., the welding position 22) to be the position with the largest amplitude, and can effectively output the energy generated by ultrasonic vibration to the workpiece to be welded.
[0033] In some embodiments of this application, several second welding heads 2 are provided with mounting positions 23 in their middle portions. The mounting positions 23 protrude from the surface of the second welding head 2 and are arranged to reduce the contact area for ultrasonic vibration transmission and effectively reduce transverse waves. The mounting positions 23 are connected to the first welding head 1 by mounting bolts 3, so that the second welding head 2 and the first welding head 1 can be detached and installed. The connection position between the first welding head 1 and the second welding head 2 is at the position of maximum amplitude. Therefore, the first welding head 1 and the second welding head 2 can be effectively excited, thereby improving energy transfer efficiency.
[0034] In some embodiments of this application, the first welding head 1 is provided with a plurality of first vibration grooves 11, which are distributed along the longitudinal direction of the first welding head 1. The first vibration grooves 11 can effectively filter the transverse waves on the first welding head 1, ensuring that the ultrasonic vibration is transmitted along the longitudinal direction of the first welding head 1 and that the vibration energy is evenly distributed, thereby improving the stability and consistency of the welding process.
[0035] In some embodiments of this application, the second welding head 2 is provided with a plurality of second vibration grooves 21, which are distributed along the longitudinal direction of the second welding head 2. The second vibration grooves 21 can effectively filter the transverse waves on the second welding head 2, ensuring that the ultrasonic vibration is transmitted along the longitudinal direction of the second welding head 2 and that the vibration energy is evenly distributed, thereby improving the stability and consistency of the welding process.
[0036] In some embodiments of this application, the first welding head 1 is arranged along a first direction, and the second welding head 2 is arranged along a second direction, with the first and second directions intersecting perpendicularly. By precisely controlling the relative positions of the first welding head 1 and the second welding head 2, the vibration energy of the second welding head 2 is maximized in the welding area, significantly improving the stability and reliability of the welding process.
[0037] According to some embodiments of this application, an ultrasonic welding assembly is also provided, including a transducer 4, an amplitude modulator 5, and a first welding head 1 and a second welding head 2 as described above. The transducer 4 and the amplitude modulator 5 are connected by bolts 3, and the amplitude modulator 5 is connected to the first welding head 1 by bolts 2. The mounting position 12 on the first welding head 1 protrudes from the end face of the first welding head 1, which can reduce the contact area and ensure that transverse waves are filtered during ultrasonic vibration transmission. The assembly has a simple design structure, is easy to install and maintain, and is suitable for various welding scenarios.
[0038] 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.
[0039] 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. A novel ultrasonic welding head, characterized in that, It includes a first welding head and a second welding head, with several second welding heads configured. The several second welding heads are arranged side by side and detachably installed at the end of the first welding head. The first welding head and the second welding head are arranged perpendicularly. The natural frequency of the first welding head is coupled with the natural frequency of the second welding head and resonates under the action of an ultrasonic source. The first welding head and the second welding head have vibration modes. Both the first welding head and the second welding head contain at least one acoustic node.
2. The novel ultrasonic welding head according to claim 1, characterized in that, The connection point between the first welding head and the second welding head is located at the antinode position in the vibration mode of the first welding head.
3. The novel ultrasonic welding head according to claim 1, characterized in that, The end of the second welding head is provided with a welding position, which is located at the antinode position in the vibration mode of the second welding head.
4. The novel ultrasonic welding head according to claim 1, characterized in that, The length of the first welding head in the longitudinal direction is an integer multiple of half a wavelength and contains at least one acoustic node.
5. A novel ultrasonic welding head according to claim 1, characterized in that, The second welding head has a length in the longitudinal direction that is an integer multiple of half a wavelength and contains at least one acoustic node.
6. A novel ultrasonic welding head according to claim 1, characterized in that, Each of the second welding heads has a mounting position in its middle portion, and the mounting position is used to connect the second welding head to the first welding head by mounting bolts.
7. A novel ultrasonic welding head according to claim 1, characterized in that, The first welding head is provided with several first vibration grooves, which are distributed along the longitudinal direction of the first welding head.
8. A novel ultrasonic welding head according to claim 1, characterized in that, The second welding head is provided with several second vibration grooves, which are distributed along the longitudinal direction of the second welding head.
9. A novel ultrasonic welding head according to claim 1, characterized in that, The first welding head is arranged along a first direction, and the second welding head is arranged along a second direction, with the first direction and the second direction intersecting perpendicularly.
10. An ultrasonic welding assembly, characterized in that, It includes a transducer, an amplitude modulator, and a first welding head and a second welding head as described in any one of claims 1 to 9, wherein the transducer is connected to the amplitude modulator and the amplitude modulator is connected to the first welding head.