Welding head for ultrasonic welding

Abstract

The utility model discloses a welding head for ultrasonic welding, which comprises a welding head body and a plurality of welding teeth arranged at the working end of the welding head body, a groove is formed between every two adjacent welding teeth, and the depth of each groove is smaller than that of each welding tooth. According to the scheme, the welding firmness can be improved.

Description

Technical Field

[0001] This application relates to the technical field of ultrasonic welding, and more specifically to a welding head for ultrasonic welding. Background Technology

[0002] Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. It is widely used in metal welding, especially in the automotive, electronics, and medical device industries.

[0003] Currently, the welding head used in ultrasonic welding typically includes a welding head body and several welding teeth set on the welding head body. Welding is completed through direct contact between the welding teeth and the workpiece.

[0004] However, in the above-mentioned welding head, there are grooves between adjacent welding teeth, and the bottom of the grooves is usually flush with the root of the welding teeth. This results in the welding head and the workpiece only being in contact through the welding teeth during welding, resulting in a small total welding contact area and generally weak welding strength. Utility Model Content

[0005] This application provides a welding head for ultrasonic welding, which can improve the strength of the weld.

[0006] This application provides an ultrasonic welding head, including a welding head body and a plurality of welding teeth disposed at the working end of the welding head body, wherein a groove is formed between adjacent welding teeth, and the depth of the groove is less than the tooth depth of the welding teeth.

[0007] In some embodiments, the depth of the groove is 30% to 60% of the tooth depth of the weld tooth.

[0008] In some embodiments, the sidewall edges of the trench are configured to be chamfered, and the edges of the weld teeth are configured to be chamfered.

[0009] In some embodiments, the working end of the welding head body is formed with a platform, the welding teeth are located within the platform, and the root of the welding teeth is flush with the platform.

[0010] In some embodiments, a transition surface is formed between the root of the welding tooth and the platform.

[0011] In some embodiments, the welding head body has a chamfered edge and a clearance surface between it and one side of the platform.

[0012] In some embodiments, a plurality of the welding tooth arrays are distributed at the working end of the welding head body.

[0013] In some embodiments, the surface of the welding tooth and the bottom surface of the groove are coated with a wear-resistant coating and an anti-stick coating.

[0014] The technical solution of this application has at least the following advantages:

[0015] 1. By setting several welding teeth on the welding head body and forming a groove between adjacent welding teeth with a depth less than the depth of the welding teeth, both the welding teeth and the bottom of the groove will contact the workpiece during welding. Compared with the welding head of the prior art that only welds through welding teeth, the welding area is effectively increased and the welding strength is improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an ultrasonic welding head provided in an exemplary embodiment of this application;

[0018] Figure 2 This is an exemplary embodiment provided by this application. Figure 1 Enlarged diagram of section A in the middle;

[0019] Figure 3 This is a schematic diagram provided by an exemplary embodiment of the present application, illustrating the positional relationship between the welding head for ultrasonic welding and the workpiece when they come into contact.

[0020] Figure 4 This is a schematic diagram illustrating the size of a welding head for ultrasonic welding, provided by an exemplary embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Welding head body; 2. Welding teeth; 3. Groove; 4. Platform; 5. Avoidance surface. Detailed Implementation

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, 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 this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0026] This application provides a welding head for ultrasonic welding, as shown in the reference. Figure 1 It includes a welding head body 1 and a plurality of welding teeth 2 disposed at the working end of the welding head body 1. The working end of the welding head body 1 refers to the end face of the welding head body 1 that needs to contact the workpiece during welding. Grooves 3 are formed between adjacent welding teeth 2, and the depth of the grooves 3 is less than the tooth depth of the welding teeth 2. When welding using the above-mentioned ultrasonic welding head, in addition to the welding teeth 2 contacting the workpiece, the bottom of the grooves 3 between the welding teeth 2 also contacts the workpiece, such as... Figure 3 As shown, this increases the total contact area, which helps improve welding quality and weld strength. Specifically, in... Figure 3 In this context, the filled graphic represents the object being welded.

[0027] Furthermore, the tooth depth of weld tooth 2 (e.g.) Figure 4 As shown in H1, the design can be based on the thickness of the workpiece. The depth of the groove 3 between the weld teeth 2 (as shown in H1) can be designed according to the thickness of the workpiece. Figure 4 As shown in D1, the tooth depth of the welding tooth 2 is 30% to 60%. In specific design, it can be adjusted within the above range according to the thickness of the workpiece to ensure that the bottom of the groove 3 will also contact the workpiece during welding.

[0028] Furthermore, to reduce the possibility of the workpiece being accidentally cut during the welding process, such as... Figure 2 As shown, the sidewall edges of the groove 3 are configured to be chamfered, and the edges of the weld teeth 2 are also configured to be chamfered.

[0029] Furthermore, refer to Figure 1 and Figure 2 A platform 4 is formed at the working end of the welding head body 1. The welding teeth 2 are located within the range of the platform 4, and the root of the welding teeth 2 is flush with the platform 4. The bottom of the groove 3 is also higher than the platform 4. During the welding process, the platform 4 can prevent the welded object from lifting. In addition, a transition surface is also formed between the root of the welding teeth 2 and the platform 4, which can increase the connection strength between the welding teeth 2 and the platform 4.

[0030] Furthermore, refer to Figure 2 The welding head body 1 has a chamfered edge on one side adjacent to the platform 4, forming a clearance surface 5. The radius of this clearance surface 5 can be specifically set according to the shape of the object being welded. For example, when the width of the platform 4 is less than 2mm, the radius of the clearance surface 5 can be in the range of 1mm to 5mm. During welding, the clearance surface 5 faces the object being welded to prevent the platform 4 from pressing on it, thus protecting the object. For example, when welding foil on a battery pack, the presence of the clearance surface 5 prevents the edge of the welding head body 1 from pressing on the battery pack.

[0031] Furthermore, in the above embodiment, the welding teeth 2 are arranged in a row. In other embodiments, the welding teeth 2 can also be distributed in an array at the working end of the welding head body 1, such as in a circular array, a rectangular array, etc., to meet the needs of different welded objects. When the welding teeth 2 are distributed in an array within the platform 4, there is a groove 3 between any two welding teeth 2.

[0032] Furthermore, in order to improve the service life of the ultrasonic welding head, a wear-resistant coating and an anti-stick coating can be applied to the surface of the welding tooth 2 and the bottom surface of the groove 3.

[0033] The ultrasonic welding head provided in this application embodiment has a plurality of welding teeth 2 on the welding head body 1, and grooves 3 with a depth less than the tooth depth of adjacent welding teeth 2 are formed between them. During welding, both the welding teeth 2 and the bottom of the grooves 3 come into contact with the workpiece. Compared with welding heads in the prior art that only weld with welding teeth 2, this effectively increases the welding area and improves the weld strength. At the same time, the platform 4 provided on the working end of the welding tooth 2 body can prevent the workpiece from lifting during the welding process. In addition, the setting of the avoidance surface 5, the transition surface and the chamfer treatment can reduce the possibility of damage to the workpiece during the welding process, further improving the welding quality.

[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. An ultrasonic welding horn characterized by, It includes a welding head body (1) and a plurality of welding teeth (2) disposed at the working end of the welding head body (1). A groove (3) is formed between adjacent welding teeth (2). The depth of the groove (3) is less than the tooth depth of the welding teeth (2). The depth of the groove (3) is 30% to 60% of the tooth depth of the welding teeth (2).

2. The horn for ultrasonic welding according to claim 1, characterized by The sidewall edges of the groove (3) are configured to be chamfered, and the edges of the welding teeth (2) are configured to be chamfered.

3. The horn for ultrasonic welding according to claim 1, characterized by The working end of the welding head body (1) has a platform (4), the welding tooth (2) is located inside the platform (4), and the root of the welding tooth (2) is flush with the platform (4).

4. The horn for ultrasonic welding according to claim 3, characterized in that, A transition surface is formed between the root of the welding tooth (2) and the platform (4).

5. The horn for ultrasonic welding according to claim 3, characterized in that, The welding head body (1) has a chamfered edge and a clearance surface (5) between it and the platform (4) on one side adjacent to the platform (4).

6. The horn for ultrasonic welding according to claim 1, characterized by Several of the welding teeth (2) are arranged in an array at the working end of the welding head body (1).

7. The horn for ultrasonic welding according to claim 1, characterized by The surface of the welding tooth (2) and the bottom surface of the groove (3) are coated with a wear-resistant coating and an anti-stick coating.

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