Ultrasonic metal welding module

Abstract

The utility model discloses an ultrasonic metal welding module, which belongs to the technical field of ultrasonic welding and comprises an ultrasonic transducer, a threaded amplitude-change pole, an ultrasonic welding head and a through hole amplitude-change pole. Threads are arranged at the two ends of the threaded amplitude-change pole, and through holes are formed in the axis of the through hole amplitude-change pole and the bottom of the ultrasonic welding head. The end of the ultrasonic transducer is in fastening connection with one end of the threaded amplitude-change pole through standard threads, the other end of the threaded amplitude-change pole is in fastening connection with the ultrasonic welding head and the through hole amplitude-change pole through a long screw rod, and one end of the long screw rod is in threaded connection with the end of the threaded amplitude-change pole. And the other end of the ultrasonic welding head penetrates through the ultrasonic welding head and a through hole in the through hole amplitude-change pole and is in threaded connection with a locking nut. The upper limit of the welding pressure is improved, the production and maintenance cost is reduced, and the equipment stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic welding, and in particular relates to an ultrasonic metal welding module. Background Art

[0002] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers. When ultrasonic welding metals, neither current is transmitted to the workpieces nor high-temperature heat is applied to the workpieces. It only converts ultrasonic vibration energy into friction, deformation and limited temperature rise between the workpieces under static pressure. The connection between the joints is a solid-state welding achieved without melting the parent material. Therefore, it effectively overcomes the spatter and oxidation phenomena produced during hot melt welding.

[0003] 1. The welding position of the ultrasonic welding head and the position where the welding pressure is applied are not on the same axis, resulting in the risk of bending and deformation of the ultrasonic vibration component, making it impossible to achieve welding under high pressure conditions, limiting the welding power. Taking the Chinese invention patent with publication number CN106239897B as an example, the welding pressure is applied by a cantilever structure, the clamping actuator and the welding base are not on the same axis, and the ultrasonic vibration head is both a vibration friction component and a pressure transmission component that bears bending moment. This structure has poor rigidity, limited welding pressure, and limited welding power. Long-term full-load operation will increase the risk of damage.

[0004] Second, the ultrasonic welding tool head is a consumable part in the ultrasonic welding machine. The special-shaped tool head is difficult to process, the processing cost is high, and the replacement time is long, which is not conducive to actual production application. Taking the Chinese invention patent application with publication number CN112743219A as an example, an integral direct pressure welding head is used. The integral welding head structure greatly increases the processing difficulty and processing cost, and the use cost increases accordingly, which is not conducive to the promotion of technology and mass production application.

[0005] Therefore, an ultrasonic metal welding module is proposed to solve the above problems. Utility Model Content

[0006] In order to solve the above-mentioned technical problems of limited ultrasonic welding pressure, difficult processing of ultrasonic welding heads and high processing costs, the utility model proposes an ultrasonic metal welding module.

[0007] To achieve the above object, the utility model provides an ultrasonic metal welding module, comprising: an ultrasonic transducer, a threaded horn, an ultrasonic welding head and a through-hole horn; both ends of the threaded horn are provided with threads, and through holes are provided on the axis of the through-hole horn and on the side surface of the ultrasonic welding head; the end of the ultrasonic transducer is fixedly connected with one end of the threaded horn through a standard thread, the other end of the threaded horn is fixedly connected with the ultrasonic welding head and the through-hole horn through a long screw, one end of the long screw is threadedly connected with the end of the threaded horn, and the other end passes through the through holes on the ultrasonic welding head and the through-hole horn and is threadedly connected with a locking nut.

[0008] Preferably, the ultrasonic welding head comprises a mass block, and a straight rod extends from one end of the mass block, and the through hole is provided on the center line of the side surface of the straight rod.

[0009] Preferably, a toothed structure is provided at one end of the straight rod away from the mass block.

[0010] Preferably, the ultrasonic transducer adopts a piezoelectric longitudinal vibration transducer.

[0011] Preferably, the threaded horn and the through-hole horn are of a conventional variable cross-section cylindrical structure.

[0012] Compared with the prior art, the utility model has the following advantages and technical effects:

[0013] 1. The utility model adopts a direct pressure form in structure, and the welding position of the ultrasonic welding head and the position where the welding pressure is applied are on the same axis, which can bear a large pressure, reduce the risk of bending deformation of the ultrasonic vibration components, can realize welding under large pressure conditions, and improve the welding power;

[0014] 2. The bending resonator composed of multiple parts greatly reduces the processing difficulty and processing cost of the ultrasonic welding head compared with the integral special-shaped welding head;

[0015] 3. In the connection mode of the horn, the application adopts the method of installing the long screw through the through-hole horn. Compared with the method of connecting the end of the standard screw, due to its longer length, the long screw will have a greater elastic deformation when receiving the same axial force. This makes the pre-tightening force more evenly distributed when the welding module is subjected to longitudinal vibration from the ultrasonic transducer under the actual welding working conditions, and the stress of each part of the connecting piece is relatively balanced, which helps to avoid local stress concentration, and can reduce material fatigue and connection loosening caused by stress concentration. And the uniform pre-tightening force can also ensure that sufficient friction force is generated between the contact surfaces of the connecting pieces. This friction force helps to resist external vibration and impact, prevent relative sliding or separation between the connecting pieces, and ensure the stable operation of the welding module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the ultrasonic metal welding module of the present utility model;

[0018] Figure 2 is a cross-sectional view of the ultrasonic metal welding module of the present utility model.

[0019] In the figure: 1. Ultrasonic transducer; 2. Standard screw; 3. Threaded horn; 4. Ultrasonic welding head; 41. Mass block; 42. Straight rod; 5. Through-hole horn; 6. Long screw; 7. Locking nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Referring to Figures 1 to 2 as shown, this embodiment provides an ultrasonic metal welding module, including: an ultrasonic transducer 1, a threaded horn 3, an ultrasonic welding head 4, and a through-hole horn 5; both ends of the threaded horn 3 are provided with threads, and through holes are provided on the axis of the through-hole horn 5 and the side surface of the ultrasonic welding head 4; the end of the ultrasonic transducer 1 is fixedly connected to one end of the threaded horn 3 through a standard thread, and the other end of the threaded horn 3 is fixedly connected to the ultrasonic welding head 4 and the through-hole horn 5 through a long screw 6. One end of the long screw 6 is threadedly connected to the end of the threaded horn 3, and the other end passes through the through holes on the ultrasonic welding head 4 and the through-hole horn 5 and is threadedly connected to a locking nut 7.

[0023] Ultrasonic welding requires sufficient pressure in the welding area and sufficient amplitude of the ultrasonic welding head 4, that is, sufficient power output is required to ensure the welding quality. The present utility model adopts a direct pressure form in its structure. The welding position of the ultrasonic welding head and the position where the welding pressure is applied are on the same axis, which can withstand a large pressure, reduce the risk of bending deformation of the ultrasonic vibration components, enable welding under large pressure conditions, and improve the welding power; the bending resonator composed of multiple parts significantly reduces the processing difficulty and processing cost of the ultrasonic welding head 4 compared with the integral special-shaped welding head; in terms of the connection method of the horn, the present application adopts the method of installing a long screw 6 through the through-hole horn 5. The ultrasonic welding head 4 and the through-hole horn 5 are slidably sleeved outside the long screw 6 and are fastened to the threaded horn 3 by squeezing with a locking nut 7. Compared with the connection method of the standard screw 2 at the end, due to its longer length, the long screw 6 will have a greater elastic deformation when subjected to the same axial force. This makes the pre-tightening force more evenly distributed when the welding module is subjected to longitudinal vibrations from the ultrasonic transducer 1 under actual welding conditions, and the stress on each part of the connecting piece is more balanced. This helps to avoid local stress concentration, reduce material fatigue and connection loosening caused by stress concentration. And the uniform pre-tightening force can also ensure that sufficient friction force is generated between the contact surfaces of the connecting pieces. This friction force helps to resist external vibrations and impacts, prevent relative sliding or separation between the connecting pieces, and ensure the stable operation of the welding module.

[0024] In a further optimized solution, the ultrasonic welding head 4 includes a mass block 41. One end of the mass block 41 extends out a straight rod 42, and a through hole is opened on the center line of the side of the straight rod 42.

[0025] The mass block 41 can be positioned and installed on the pressing mechanism. The pressure direction of the pressing mechanism is perpendicular to the axes of the ultrasonic transducer 1, the threaded horn 3 and the through-hole horn 5. The mass block 41 bears the pressure applied from the outside and vertically transmits the pressure to the end of the ultrasonic welding head 4 in contact with the welded part. Combining with the welding power provided by the ultrasonic transducer, the welding is completed.

[0026] In a further optimized solution, a toothed structure is opened at one end of the straight rod 42 away from the mass block 41.

[0027] The toothed structure is arranged at the end of the ultrasonic welding head 4 in contact with the welded part, which can increase the contact area between the ultrasonic welding head 4 and the welded part, help to more evenly transmit ultrasonic energy, and improve the energy transmission efficiency. The toothed design can concentrate ultrasonic energy, resulting in a temperature rise in the local area, which helps the melting and bonding of materials. It can also increase the friction force of the contact surface, help the materials to mix at the welding interface, and form a more firm connection.

[0028] In a further optimized solution, the ultrasonic transducer 1 adopts a piezoelectric longitudinal vibration transducer.

[0029] The piezoelectric longitudinal vibration transducer has many advantages such as high reliability, high energy conversion efficiency, and strong anti-interference ability.

[0030] For a further optimized solution, the threaded horn 3 and the through-hole horn 5 are of a conventional variable cross-section cylindrical structure.

[0031] The variable cross-section cylindrical structure is conducive to generating a bending vibration mode, and has high energy transfer efficiency, high reliability, and is easy to adjust.

[0032] In the present utility model, the threaded horn, the ultrasonic welding head, the through-hole horn, and the locking nut are sequentially fastened by long bolts. It can also be made into an integrated form of different combinations, such as making any horn and the welding head into an integrated structure; making two horns and the welding head into an integrated structure. Any combination form with the same overall structure is within the protection scope.

[0033] Working principle:

[0034] The ultrasonic metal welding module is a typical combination of longitudinal vibration and bending vibration. By reasonably selecting the node position, the longitudinal vibration of the ultrasonic transducer 1 is converted into the bending vibration of the ultrasonic welding head 4 required for welding, that is, under the excitation of the ultrasonic transducer, the ultrasonic welding head 4 generates a bending vibration mode with multiple nodes, and the position of the ultrasonic welding head 4 in contact with the welding material, at the bottom of the ultrasonic welding head 4, is the place with the largest amplitude. Finally, the ultrasonic vibration energy is converted into the energy of the ultrasonic welding head 4 rubbing the welding material in the welding area. During welding, the top of the ultrasonic welding head 4 bears an external pressure, and at the same time, the ultrasonic transducer 1, the threaded horn 3, the through-hole horn 5, and the locking nut 7 fixedly connected to the ultrasonic welding head 4 form a bending resonator with the ultrasonic welding head 4. The ultrasonic transducer provides the welding power, and welding is completed under the external pressure.

[0035] The details not described in the present utility model are all well-known conventional technical means in the art.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, 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 therefore should not be construed as a limitation to the present utility model.

[0037] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An ultrasonic metal welding module, characterized in that, Including: An ultrasonic transducer (1), a threaded horn (3), an ultrasonic welding head (4), and a through-hole horn (5); both ends of the threaded horn (3) are provided with threads, and through holes are provided on the axis of the through-hole horn (5) and on the side surface of the ultrasonic welding head (4); the end of the ultrasonic transducer (1) is fixedly connected to one end of the threaded horn (3) through a standard thread, and the other end of the threaded horn (3) is fixedly connected to the ultrasonic welding head (4) and the through-hole horn (5) through a long screw (6). One end of the long screw (6) is threadedly connected to the end of the threaded horn (3), and the other end passes through the through holes on the ultrasonic welding head (4) and the through-hole horn (5) and is threadedly connected with a locking nut (7); The ultrasonic welding head (4) includes a mass block (41), and a straight rod (42) extends from one end of the mass block (41), and the through hole is provided on the center line of the side surface of the straight rod (42); A toothed structure is provided at the end of the straight rod (42) far from the mass block (41).

2. The ultrasonic metal welding module according to claim 1, wherein: The ultrasonic transducer (1) adopts a piezoelectric longitudinal vibration transducer.

3. The ultrasonic metal welding module according to claim 1, wherein: The threaded horn (3) and the through-hole horn (5) are of a conventional variable cross-section cylindrical structure.

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