CN216576036U - Full-wave ultrasonic welding head and ultrasonic three-in-one set - Google Patents

Abstract

The utility model provides a full-wave ultrasonic welding head and an ultrasonic three-in-one set. A full wave ultrasonic horn has a longitudinal direction and a transverse direction and includes a horn body and a working portion. The welding head body is axisymmetric relative to the transverse center line of the welding head, and the working part is arranged in the middle of the welding head body and is axisymmetric relative to the transverse center line of the welding head. The working part is provided with a connecting side connected with the welding head body and an open side opposite to the connecting side, at least one spacing groove is arranged in the open side, and the spacing groove is longitudinally formed to divide the open side into at least two working faces. The full-wave ultrasonic welding head can meet the adaptability of the welding head to different working conditions while realizing double-point/multi-point welding.

Description

Full-wave ultrasonic welding head and ultrasonic three-in-one set

Technical Field

The utility model relates to the field of ultrasonic welding, in particular to a full-wave ultrasonic welding head and an ultrasonic three-in-one set.

Background

The ultrasonic welding technique is a welding process in which high-frequency vibration waves are transmitted to the surfaces of two objects to be welded, and the surfaces of the two objects are rubbed against each other under pressure to form fusion between molecular layers. In order to improve the welding efficiency of ultrasonic spot welding, two or more welding marks are usually welded at one time by designing a double-point or multi-point welding head on a welding head.

Fig. 1 to 3 schematically illustrate a structure of a conventional double spot welding head, wherein the welding head structure shown in fig. 1 to 3 is a half-wave welding head, which includes a node point 90 and two working areas 91, and the two working areas 91 are symmetrical to each other along a center line 92 of the welding head. Two working portions 911 are included in each working area, and the welding head performs welding by contacting the working portions 911 with the workpiece. In the horn configuration shown in the figures, it has an acoustic vibration direction 9a (generally referred to as the longitudinal direction), and a transverse direction 9b, the transverse direction 9b being perpendicular to the acoustic vibration direction 9 a. The weld in the horn configuration has a transverse length H9 and a longitudinal length Z9.

However, for horn configurations such as that shown, where the transverse extent of the weld H9 is greater, the longitudinal extent Z9 may be relatively smaller, otherwise it may be difficult to ensure amplitude uniformity of the weld. When the longitudinal length Z9 of the solder mark is larger, the transverse length H9 is relatively smaller, otherwise it is difficult to ensure the amplitude uniformity of the solder mark. When both the pad transverse length H9 and the longitudinal length Z9 need to be large, both the amplitude uniformity of the pad and the gain of the horn are difficult to guarantee. Therefore, the design of the welding head structure with the configuration is limited by the mutual restriction between the transverse length H9 and the longitudinal length Z9 of the welding mark, so that an ideal welding mark cannot be obtained in some working conditions, and the adaptability of the welding head to different working conditions can be met while the welding head can realize double-point/multi-point welding.

SUMMERY OF THE UTILITY MODEL

One object of the present invention is to provide a full-wave ultrasonic welding head which can meet the adaptability of the welding head to different working conditions while realizing two-point/multi-point welding.

To achieve the foregoing object, a full wave ultrasonic horn having a longitudinal direction and a transverse direction, comprises:

the welding head body is axisymmetrical relative to the transverse center line of the welding head; and

the working part is arranged in the middle of the welding head body and is axisymmetric relative to the transverse center line of the welding head;

the working part is provided with a connecting side connected with the welding head body and an open side opposite to the connecting side, at least one spacing groove is arranged in the open side, and the spacing groove is formed along the longitudinal direction and divides the open side into at least two working faces.

In one or more embodiments, the partition groove is penetratingly opened in the working portion to divide the open side into at least two working surfaces.

In one or more embodiments, the working portions protrude from two sides of the welding head body, and the working portions respectively disposed on the two sides of the welding head body are axisymmetric with respect to a longitudinal center line of the welding head.

In one or more embodiments, the full wave ultrasonic horn has a height direction that is perpendicular to the longitudinal direction and the transverse direction, respectively;

the welding head comprises a welding head body, wherein a section which is adducted along the height direction is arranged in the middle of the welding head body, and the working part is arranged at the adducted section.

In one or more embodiments, the working portion has a longitudinal length along the longitudinal direction; the working portion has a transverse length along the transverse direction;

wherein the intermediate position of the horn body has a section adducted in the transverse direction, the working portion being provided at the adducted section to allow the longitudinal length to be greater than the transverse length.

In one or more embodiments, the working portion has a longitudinal length along the longitudinal direction; the working portion has a transverse length along the transverse direction;

wherein the longitudinal length is less than the transverse length.

In one or more embodiments, the full wave ultrasound horn further has a height direction that is perpendicular to the longitudinal direction and the transverse direction, respectively;

the cross section of the welding head body is rectangular, and the side length of the rectangle along the transverse direction is larger than that of the rectangle along the height direction, so that the longitudinal length is allowed to be smaller than the transverse length.

In one or more embodiments, the horn body has two acoustic nodes that are axisymmetric with respect to a transverse center line of the horn;

the full-wave ultrasonic welding head further comprises a connecting part, and the connecting part corresponds to the two acoustic nodes and is respectively arranged on two sides of the welding head body.

In one or more embodiments, a shock absorbing opening is opened in the connecting portion.

It is another object of the present invention to provide an ultrasonic triad including a transducer, an amplitude modulator, and a full wave horn as described above.

The advanced effects of the utility model include one or a combination of the following:

through configuring the ultrasonic welding head into the full-wave welding head structure which is axially symmetrical relative to the transverse central line, the working part is easier to ensure the amplitude uniformity and the gain of the welding head, the design of the structure of the working part is limited by the relation between the transverse length and the longitudinal length, the influence is small, the longitudinal length and the transverse length of the working part can be both large sizes, and the requirement of double-point welding for the required welding of the transverse length and the large longitudinal length is met.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 to 3 schematically show a structure of a conventional double spot welding head;

FIG. 4 illustrates a perspective view of a full wave ultrasonic horn in accordance with an embodiment;

FIG. 5 illustrates a schematic top view of a full wave ultrasonic horn in accordance with an embodiment;

FIG. 6 shows a schematic perspective view of a full wave ultrasonic horn in accordance with another embodiment;

FIG. 7 shows a schematic perspective view of a full wave ultrasonic horn in accordance with yet another embodiment;

FIG. 8 shows a schematic perspective view of a full wave ultrasonic horn in accordance with yet another embodiment;

fig. 9-10 show perspective views of a full wave ultrasonic horn in accordance with yet another embodiment.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present disclosure. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

In order to increase the applicability of the two-point/multi-point welding head under different working conditions, one or more of the following embodiments describe a full-wave ultrasonic welding head, which can enable the configuration of the welding head to meet the requirements of different welding marks to be obtained while realizing the two-point/multi-point welding head, thereby improving the applicability of the welding head.

Fig. 4 shows a perspective view of an embodiment of a full-wave sonotrode, and fig. 5 shows a schematic top view of an embodiment of a full-wave sonotrode. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the utility model as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.

Referring to fig. 4 and 5 in combination, the full wave sonotrode has a longitudinal direction a and a transverse direction b. Wherein the longitudinal direction a is the direction of acoustic vibrations during transmission of ultrasonic waves in the horn when the horn is in operation, and the transverse direction b is perpendicular to the longitudinal direction a. The full-wave ultrasonic welding head comprises a welding head body 1 and a working part 2, the full-wave ultrasonic welding head is connected with an ultrasonic welding machine, an energy converter and an amplitude modulator through the welding head body 1, and the working part 2 serves as a contact part of the full-wave ultrasonic welding head and a workpiece to be welded in the welding process.

The full wave horn has a transverse centerline 100, the transverse centerline 100 extending in a transverse direction b of the full wave horn and passing through the geometric center of the full wave horn. The welding head body 1 is axisymmetric relative to the transverse center line 100, and the working part 2 is arranged in the middle of the welding head body 1 and is axisymmetric relative to the transverse center line 100, so that the whole full-wave ultrasonic welding head is axisymmetric relative to the transverse center line 100, and the whole full-wave ultrasonic welding head meets the acoustic requirement.

The working part 2 has a connecting side 2a and an opening side 2b, the connecting side 2a and the opening side 2b are oppositely arranged at two sides of the working part 2, the working part 2 is connected with the welding head body 1 at one side of the connecting side 2a, and the working part 2 is opened at the opening side 2b to allow the working part to contact with a workpiece to be welded in the welding process. At this open side 2b, a spacing groove 20 is provided in the working part 2, the spacing groove 20 opening in the longitudinal direction a, the spacing groove 20 being, in the embodiment shown in the figures, one opening in the working part 2, so as to divide the open side 2b into two working faces: first working face 21 and second working face 22, in welding process, first working face 21 and second working face 22 respectively simultaneously with treat welding workpiece contact to can realize utilizing same bonding tool to carry out the double spot welding, promote welding efficiency. It will be appreciated that in some other suitable embodiments, the spacing groove 20 may also be two or more, such as three, four or five, which are opened in the working portion 2, so as to divide the open side 2b into a plurality of working surfaces, so as to achieve that a plurality of working surfaces are simultaneously contacted with the workpieces to be welded during the welding process, thereby achieving that multiple welding can be performed by using the same welding head, and further improving the welding efficiency. It should be understood that the terms "first working surface" and "second working surface" are used to define the components, and are used only for convenience of distinguishing the corresponding components, and the terms are not used to be construed as limiting the scope of the present application if not otherwise stated.

Wherein in the longitudinal direction a the working part 2 has a longitudinal length and in the transverse direction b the working part 2 has a transverse length. Through configuring the ultrasonic welding head into a full-wave welding head structure which is axially symmetrical relative to the transverse central line 100, the amplitude uniformity and the gain of the welding head can be more easily ensured for the working part 2, the restriction influence of the relation between the transverse length and the longitudinal length on the design of the structure of the working part 2 is small, the longitudinal length and the transverse length of the working part 2 can be both large sizes, and the requirement of double-point welding for large transverse length and large longitudinal length of required welding is met.

While one embodiment of the present full-wave horn is described above, in other embodiments of the present full-wave horn, the present full-wave horn may have many more details, and at least some of the details may be varied widely, relative to the embodiments described above. At least some of these details and variations are described below in several embodiments. As described hereinafter, this application uses specific words to describe embodiments of the application, such as "one embodiment," "an embodiment," and/or "some embodiments" to mean a particular feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

With continued reference to fig. 4 and 5, in one embodiment of the full-wave sonotrode, the full-wave sonotrode has a height direction h, which is perpendicular to the longitudinal direction a and the transverse direction b, respectively. The horn body 1 has a section that is adducted in the height direction h at an intermediate position thereof, the adduction being such that the outside diameter of the horn body 1 at the section is smaller than the outside diameter of the horn body 1 at other positions to form a first recess 11 that is recessed at the adducted section. The working part 2 is arranged at the adduction section, namely the first groove 11, so that the acoustic requirement of the full-wave ultrasonic welding head is ensured, and the welding efficiency and the welding quality are improved.

Fig. 6 shows a schematic perspective view of a full-wave sonotrode according to another embodiment, with a working part 2 having a longitudinal length Z1 and a transverse length H1. In the middle of the horn body 1, there is a section adducted in the transverse direction b, which means that the outside diameter of the horn body 1 in the section is smaller than the outside diameter of the horn body 1 in other positions, to form a second recess 12 that is recessed in the adducted section. Wherein the working portion 2 is provided at the adduction section, i.e., on the horn body 1 where the second groove 12 is formed, so as to allow the longitudinal length Z1 to be greater than the transverse length H1. Through setting up the full wave ultrasonic bonding tool that has this configuration for on the basis that has the same lateral length, the longitudinal length of this full wave ultrasonic bonding tool's work portion 2 can be than the longitudinal length of half-wave bonding tool and increase of one time longer, can also guarantee amplitude homogeneity and bonding tool simultaneously, in order to realize satisfying the demand to different configuration welding marks.

Fig. 7 shows a schematic perspective view of a full-wave ultrasonic horn according to yet another embodiment, in which the working part 2 has a longitudinal length Z2 and a transverse length H2, where the longitudinal length Z2 is smaller than the transverse length H2, and by providing the full-wave ultrasonic horn having this configuration, the transverse length of the working part 2 of the full-wave ultrasonic horn can be longer than that of a half-wave horn on the basis of the same longitudinal length, and simultaneously, amplitude uniformity and gain of the horn can be ensured, so as to meet the demands for different configurations of welding.

Fig. 8 shows a perspective view of a full-wave ultrasound horn according to a further embodiment, with a longitudinal length Z3 and a transverse length H3 of the working part 2, wherein the horn body 1 has a rectangular cross section with a side length L1 in the transverse direction b and a side length L2 in the height direction H, wherein the side length L1 is greater than the side length L2, thus allowing the longitudinal length Z3 of the working part 2 to be less than the transverse length H3. Meanwhile, the transverse length H3 of the working part 2 is related to the side length L1, and the transverse length H3 of the working part 2 can be increased by increasing the side length L1 of the welding head body 1, so that the transverse length H3 of the working part 2 is suitable for the application occasions with larger transverse distance between two welding points.

In one or more embodiments as previously described, a full wave horn has a longitudinal centerline 101, the transverse centerline 101 extending in the longitudinal direction a of the full wave horn and passing through the geometric center of the full wave horn. The working parts 2 are respectively arranged on two sides of the welding head body 1 in a protruding way as shown in the figure, meanwhile, the working parts 2 respectively arranged on two sides of the welding head body 1 are axially symmetrical relative to the longitudinal central line 101 of the welding head, on the premise of meeting the acoustic requirement of the welding head, the working parts 2 respectively arranged on two sides can realize simultaneous welding on two sides of the welding head body 1, the welding efficiency is further improved,

It will be appreciated that in other embodiments than those shown in the drawings, the working portion 2 may be provided on only one side of the horn body 1.

In one or more of the embodiments described above, the spacing groove 20 is, as illustrated in the figures, penetratingly opened in the work portion 2, thereby dividing the open side 2b into two work surfaces: a first working surface 21 and a second working surface 22. It will be understood that "divided" as used herein means that the working portion 2 is physically divided, i.e. there is no connection between the first working surface 21 and the second working surface 22 as in the embodiment shown in the figures.

In other embodiments, which are different from those shown in the figures, the spacing groove 20 may be provided in the working part 2, but not through it. If the number of the spacing grooves 20 is one, the working portion 2 is divided into a first working surface 21 and a second working surface 22, and the division indicates that the first working surface 21 and the second working surface 22 can be used as independent welding head working areas during welding, but there may be a certain connection relationship between the first working surface 21 and the second working surface 22, for example, the groove body 20 may be a groove opened in the open side 2b, and there may be a certain connection portion between the first working surface 21 and the second working surface 22 at the periphery of the groove.

Fig. 9 to 10 are perspective views of a full-wave ultrasonic horn according to yet another embodiment, please refer to fig. 1, 9 and 10 in combination. Therein, fig. 1 schematically shows the transmission path 102 of the ultrasonic waves within the horn, wherein there are two acoustic nodes 103 in the horn body 1, the two acoustic nodes 103 being axisymmetric with respect to the transverse center line 100 of the horn. The acoustic nodes, also called modal nodes, refer to positions where the vibration amplitude is close to zero, that is, in the mode animation, the motionless points are nodes. The full-wave ultrasonic welding head further comprises a connecting part 3, the connecting part 3 is arranged on two sides of the welding head body 1 corresponding to the two acoustic nodes 103 respectively, and the full-wave ultrasonic welding head is fixedly connected with the ultrasonic welding machine through the connecting part 3. Through setting up connecting piece 3 to be located acoustics node 103 position, can make connecting piece 3 vibration in welding process can reach very big decay, when having satisfied butt weld fixed mounting, can not influence ultrasonic transmission.

Further, in one embodiment of the full-wave ultrasonic welding head, a damping opening 30 is formed in the connecting portion 3, and a mounting hole 31 is formed in the connecting portion, and the connecting portion is connected to the ultrasonic welding machine through the mounting hole 31. The use of the shock absorbing openings 30 can serve to dampen modal vibrations of the mounting hole.

In one or more of the embodiments described above, the cross-section of the horn body 1 is rectangular or circular, although in other suitable embodiments the cross-section of the horn body 1 may have other suitable configurations.

In one or more of the embodiments described above, the working portion 2 is in one piece with the horn body 1. By integral piece is meant that both are formed as one piece from the same blank or stock material by an integral forming process including, but not limited to, machining, cast forming, or additive manufacturing. Of course, in other suitable embodiments, the working portion 2 is a separately manufactured part from the horn body 1 and is joined by a joining means such as a fastener joint, a weld joint, or the like.

The ultrasonic horn described in one or more of the embodiments described above may be used in an ultrasonic triad, which also includes a transducer and an amplitude modulator.

It is to be noted that one or more of the embodiments and their variations as described above may be combined as appropriate.

The advanced effects of the utility model include one or a combination of the following:

through configuring the ultrasonic welding head into the full-wave welding head structure which is axially symmetrical relative to the transverse central line, the working part is easier to ensure the amplitude uniformity and the gain of the welding head, the design of the structure of the working part is limited by the relation between the transverse length and the longitudinal length, the influence is small, the longitudinal length and the transverse length of the working part can be both large sizes, and the requirement of double-point welding for the required welding of the transverse length and the large longitudinal length is met.

Although the present invention has been disclosed in terms of preferred embodiments, it is not intended to be limited thereto, and variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims (10)

1. A full wave ultrasonic horn having a longitudinal direction and a transverse direction, comprising:

the welding head body is axisymmetrical relative to the transverse center line of the welding head; and

the working part is arranged in the middle of the welding head body and is axisymmetric relative to the transverse center line of the welding head;

the working part is provided with a connecting side connected with the welding head body and an open side opposite to the connecting side, at least one spacing groove is arranged in the open side, and the spacing groove is formed along the longitudinal direction and divides the open side into at least two working faces.

2. The full wave ultrasonic horn of claim 1 wherein the spacer slot opens through the working portion to divide the open side into at least two working faces.

3. The full wave ultrasonic horn of claim 1 wherein said working portions project on opposite sides of said horn body, said working portions on opposite sides of said horn body being axisymmetric with respect to a longitudinal center line of said horn.

4. The full wave sonotrode of claim 1, wherein said full wave sonotrode has a height direction, said height direction being perpendicular to said longitudinal direction and said transverse direction, respectively;

the welding head comprises a welding head body, wherein a section which is adducted along the height direction is arranged in the middle of the welding head body, and the working part is arranged at the adducted section.

5. The full wave ultrasonic horn of claim 1 wherein, in the longitudinal direction, the working portion has a longitudinal length; along the transverse direction, the working portion has a transverse length;

wherein the intermediate position of the horn body has a section adducted in the transverse direction, the working portion being provided at the adducted section to allow the longitudinal length to be greater than the transverse length.

6. The full wave ultrasonic horn of claim 1 wherein, in the longitudinal direction, the working portion has a longitudinal length; the working portion has a transverse length along the transverse direction;

wherein the longitudinal length is less than the transverse length.

7. The full wave sonotrode of claim 1, wherein said full wave sonotrode further has a height direction, said height direction being perpendicular to said longitudinal direction and said transverse direction, respectively;

the cross section of the welding head body is rectangular, and the side length of the rectangle along the transverse direction is larger than that of the rectangle along the height direction, so that the longitudinal length is allowed to be smaller than the transverse length.

8. The full wave ultrasonic horn of claim 1 wherein the horn body has two acoustic nodes that are axisymmetric with respect to a transverse center line of the horn;

the full-wave ultrasonic welding head further comprises a connecting part, and the connecting part corresponds to the two acoustic nodes and is respectively arranged on two sides of the welding head body.

9. The full wave ultrasonic horn of claim 8 wherein the connecting portion defines a shock absorbing opening therein.

10. An ultrasonic triad comprising a transducer, an amplitude modulator, and a full wave horn of any of claims 1-9.

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