CN211334615U - Amplitude transformer and ultrasonic welding device - Google Patents
Amplitude transformer and ultrasonic welding device Download PDFInfo
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- CN211334615U CN211334615U CN202020774418.9U CN202020774418U CN211334615U CN 211334615 U CN211334615 U CN 211334615U CN 202020774418 U CN202020774418 U CN 202020774418U CN 211334615 U CN211334615 U CN 211334615U
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Abstract
The utility model relates to an ultrasonic machining technical field discloses an amplitude transformer and including its ultrasonic welding device, and this amplitude transformer includes: a first section that is cylindrical; the central axis of the second section is basically coincident with the central axis of the first section, the rear end of the second section is connected with the front end of the first section, the outer diameter of the rear end of the second section is basically consistent with that of the first section, and the outer diameter of the second section is gradually reduced from back to front; wherein the ratio of the axial length of the first section to the axial length of the second section is in the range of (1:0.5) to (1:2), and the ratio of the outer diameter of the rear end of the second section to the outer diameter of the front end of the second section is in the range of (1.1: 1) to (8: 1). The utility model has the advantages that: the stress concentration can be effectively reduced, the fracture phenomenon is avoided, and the amplitude amplification ratio of the amplitude transformer can be increased.
Description
Technical Field
The utility model relates to an ultrasonic machining technical field especially relates to an amplitude transformer and ultrasonic welding device.
Background
The ultrasonic welding system is suitable for welding procedures of welding full-plastic nose bridge strips of masks and medical protective clothing, welding after folding edges, welding breather valves, multi-layer roll welding, welding ear bands and the like, and is also suitable for welding procedures of paper diapers, packaging bags or metal materials. The ultrasonic welding system comprises an ultrasonic generator, a transducer, an amplitude transformer and a welding head, and the general working principle is as follows: ultrasonic generator turns into the high frequency alternating current with the low frequency alternating current, turn into high-frequency vibration's mechanical energy with the electric energy through the transducer, the soldered connection produces the high-frequency vibration of several tens of thousands of times per second when acting on thermoplastic's contact surface, high-frequency vibration conveys ultrasonic energy to the weld zone through last weldment, this regional last weldment and lower weldment produce the friction, produce local high temperature, after the ultrasonic action, pressure lasts for a few seconds, make it solidify the shaping, form firm molecular chain, realize ultrasonic bonding. When the ultrasonic welding system is used for welding and processing the mask, the paper diaper, the packaging bag or the metal material, a solvent, an adhesive or other auxiliary substances are not needed, the safety and the environmental protection are realized, the pollution is avoided, the traditional manual welding is replaced, the production efficiency can be improved, and the cost can be effectively reduced.
At present, the amplitude transformer generally comprises a first section and a second section which are sequentially connected from back to front, wherein the first section and the second section are both cylindrical, in order to realize the amplitude effect, the outer diameter of the first section is larger than that of the second section, a step shape is limited at the joint of the first section and the second section, the cross section is suddenly changed, stress concentration is easily caused, and therefore the amplitude transformer is easy to break at the position.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a horn which can reduce sudden changes in stress, reduce the risk of breakage, and increase the amplitude amplification ratio. It is another object of the present application to provide an ultrasonic welding apparatus including the horn described above.
The purpose of the application is realized by the following technical scheme:
a horn, comprising:
a first section that is cylindrical; and
the central axis of the second section is basically coincident with the central axis of the first section, the rear end of the second section is connected with the front end of the first section, the outer diameter of the rear end of the second section is basically consistent with that of the first section, and the outer diameter of the second section is gradually reduced from back to front;
wherein the ratio of the axial length of the first section to the axial length of the second section is in the range of (1:0.5) to (1:2), and the ratio of the outer diameter of the rear end of the second section to the outer diameter of the front end of the second section is in the range of (1.1: 1) to (8: 1).
In the horn, optionally, a ratio of an axial length of the first section to an axial length of the second section ranges from (1:0.8) to (1:1.2), and a ratio of an outer diameter of a rear end of the second section to an outer diameter of a front end of the second section ranges from (1.5:1) to (2: 1).
In the horn, the axial length of the first segment and the axial length of the second segment are substantially the same, and are 50 mm to 70 mm;
the outer diameter of the rear end of the second section is 45 mm-60 mm, and the outer diameter of the front end of the second section is 25 mm-35 mm.
In the above horn, the outer peripheral surface of the second segment may have a catenary profile.
In the horn described above, optionally, an annular flange is provided on an outer periphery of a position where the first segment is connected to the second segment.
In the above horn, optionally, a plurality of mounting grooves are provided circumferentially spaced along an outer edge of the annular flange.
In the above horn, optionally, the front end of the first segment has an annular groove cut adjacent to the outer periphery of the annular flange.
In the above horn, optionally, the front end of the second section has a first connection hole.
In the above horn, optionally, an outer periphery of a leading end of the second segment is configured in a nut structure.
In the above horn, optionally, a second connection hole is formed at a rear end of the first section.
In the horn, optionally, two concave positions are symmetrically arranged on the periphery of the first section.
An ultrasonic welding apparatus comprising a horn according to any one of the preceding claims.
According to the amplitude transformer and the ultrasonic welding device, the outer diameter of the rear end of the second section is basically consistent with that of the first section, and the outer diameter of the second section is gradually reduced from back to front, so that stress concentration caused by sudden change of the cross section of the first section and the second section can be effectively avoided, and breakage at the connecting position of the first section and the second section is avoided; and the amplitude amplification ratio of the horn can be increased by increasing the ratio of the outer diameter of the rear end of the second section to the outer diameter of the front end thereof.
Drawings
The present application is described in further detail below in connection with preferred and compliant embodiments, but those skilled in the art will appreciate that the figures are drawn for purposes of illustrating the preferred embodiments only, and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1 is a perspective view of one embodiment of the horn of the present application;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a finite element analysis plot of the amplitude of the horn of the embodiment of FIG. 1;
FIG. 4 is a graph of a finite element stress analysis of the horn of the embodiment of FIG. 1.
In the figure, 1, the first segment; 11. an annular groove; 12. a second connection hole; 13. a concave position; 2. a second stage; 21. a first connection hole; 22. a nut structure; 3. an annular flange; 31. and (4) mounting the groove.
Detailed Description
Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.
First, it should be noted that the "front end" and "back end" referred to herein respectively refer to: the proximal machining end is the "front end" and the distal machining end is the "rear end" during machining, which are relative concepts and can therefore vary depending on the different positions in which they are located and the different conditions of use. These and other orientations, therefore, should not be used in a limiting sense.
It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality.
Furthermore, it should be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.
It will be further understood that the terms "first," "second," and the like, are used herein to describe various information and should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application.
It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.
In the face of a new crown epidemic situation, in order to improve the production quality of the mask and the medical protective equipment, the method is improved as follows.
As shown in fig. 1 to 4, a first aspect of the embodiments of the present application provides a horn comprising a first section 1 and a second section 2, wherein the first section 1 is cylindrical, a central axis of the second section 2 substantially coincides with a central axis of the first section 1, a rear end of the second section 2 is connected to a front end of the first section 1, an outer diameter of the rear end of the second section 2 substantially coincides with an outer diameter of the first section 1, and the outer diameter of the second section 2 gradually decreases from rear to front; wherein the axial length of the first section 1 is L1, the axial length of the second section 2 is L2, and the ratio of L1 to L2 is (1:0.5) - (1: 2); the outer diameter of the rear end of the second section 2 is a, the outer diameter of the front end of the second section 2 is b, a: b is (1.1: 1) - (8: 1).
Based on the above technical solution, in this embodiment, the outer diameter of the rear end of the second section 2 is kept substantially the same as the outer diameter of the first section 1, and the second section 2 has a tendency of gradually decreasing the outer diameter from the rear to the front, so that stress concentration caused by abrupt change of the cross section of the first section 1 and the second section 2 can be effectively avoided, and breakage at the connection position of the first section 1 and the second section 2 is avoided; and the amplitude amplification ratio of the horn can be increased by increasing the ratio of the outer diameter of the rear end of the second section 2 to the outer diameter of the front end thereof.
It should be noted that the horn in the present embodiment is mainly used in an ultrasonic welding apparatus, and further preferably, L1: L2 is (1:0.8) - (1:1.2) according to the actual use requirement, and a: b is (1.5:1) - (2: 1).
In the present embodiment, for example, the axial length of the first segment 1 and the axial length of the second segment 2 are substantially the same, and are about 50 mm to about 70 mm; the outer diameter of the rear end of the second section 2 is about 45 mm to 60 mm, and the outer diameter of the front end of the second section 2 is about 25 mm to 35 mm.
Specifically, in order to better solve the problem of stress concentration, the profile shape of the outer peripheral surface of the second section 2 is set to be a catenary surface, as shown in fig. 1 in particular.
It should be noted that the outer peripheral surface of the second segment 2 may be formed into a tapered surface or other shape, and the problem of stress concentration can be solved similarly, but the outer peripheral surface of the second segment 2 is preferably formed into a catenary surface.
Usually, the amplitude transformer needs to be connected with a processing machine tool during the use process, therefore, an annular flange 3 is arranged at the periphery of the position where the first section 1 is connected with the second section 2, the annular flange 3 can be used for connecting a flange, and the amplitude transformer is connected with the processing machine tool through the flange; the annular flange 3 is exemplarily arranged at a vibration node (i.e. vibration zero point) to reduce the transmission of ultrasonic vibrations to the machine tool via the annular flange 3 and the flange.
Further, as the flange is connected with the annular flange 3 by bolts, a plurality of mounting grooves 31 are axially formed in the outer edge of the annular flange 3 for bolts to pass through.
In addition, in the embodiment, in order to facilitate mounting of the flange, an annular groove 11 is formed in the periphery of the front end of the first section 1, which is adjacent to the annular flange 3; because the annular groove 11 is formed, namely a clearance position is arranged at the amplitude transformer, the flange can be prevented from contacting the amplitude transformer after being installed, and therefore the transmission of ultrasonic vibration to the flange and a processing machine tool can be reduced, and the vibration reduction effect is achieved.
During use, the rear end of the horn is typically connected to a transducer, and a machining tool (e.g., a tool, a weld head, etc.) is mounted to the front end of the horn; in order to facilitate the installation, a first connecting hole 21 is opened at the front end of the second section 2, a second connecting hole 12 is opened at the rear end of the first section 1, and the first connecting hole 21 and the second connecting hole 12 are threaded holes.
In addition, in order to facilitate the connection of the horn to the transducer by means of a tool such as a wrench, the outer periphery of the front end of the second segment 2 is constructed as a nut structure 22, while also enabling the strength of the front end of the second segment 2 to be increased. Illustratively, the nut structure 22 is a hex nut structure.
In addition, two inner concave positions 13 are symmetrically arranged on the periphery of the first section 1, and the inner concave positions 13 can be used for positioning a wrench and the like, so that the amplitude transformer can be conveniently connected with a processing tool or a transducer.
According to fig. 3 of the present application, which schematically illustrates the amplitude finite element analysis of the horn in the above-described embodiment, by setting the outer periphery of the second section 2 to be the catenary surface, the amplitude is minimum at the junction of the first section 1 and the second section 2 (which is a vibration node), the amplitude becomes gradually larger from the rear end to the front end of the second section 2, the amplitude is maximum at the foremost end of the horn, and the amplitude distribution thereof is uniform at the front end surface of the horn.
Fig. 4 shows a stress finite element analysis of the horn in the above embodiment, by providing the catenary surface at the outer periphery of the second segment 2, the stress at the joint of the first segment 1 and the second segment 2 is small, and the stress of the second segment 2 gradually increases and then gradually decreases from back to front, and the stress at the middle part is maximum, about 228.57MPa, in the axial direction of the second segment 2, and the maximum stress value is greatly reduced relative to the maximum stress value of a conventional horn, so that stress concentration is not caused, and breakage of the horn is avoided.
A second aspect of an embodiment of the present application also proposes an ultrasonic welding apparatus including a horn according to any one of the first aspect; having a horn as in any one of the first aspects, and thus having all the benefits of the horn described above, will not be described in detail herein.
In summary, the horn and the ultrasonic welding device in the embodiment of the present application keep the outer diameter of the rear end of the second section substantially consistent with the outer diameter of the first section, and the second section tends to become smaller in outer diameter from the rear to the front, so that stress concentration caused by abrupt change of the cross section of the first section and the second section can be effectively avoided, and breakage at the connection position of the first section and the second section is avoided; and the amplitude amplification ratio of the horn can be increased by increasing the ratio of the outer diameter of the rear end of the second section to the outer diameter of the front end thereof.
This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, using suitable materials, and using any incorporated methods. The scope of the present application is defined by the claims and includes other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (10)
1. A horn, comprising:
a first section that is cylindrical; and
the central axis of the second section is basically coincident with the central axis of the first section, the rear end of the second section is connected with the front end of the first section, the outer diameter of the rear end of the second section is basically consistent with that of the first section, and the outer diameter of the second section is gradually reduced from back to front;
wherein the ratio of the axial length of the first section to the axial length of the second section is in the range of (1:0.5) to (1:2), and the ratio of the outer diameter of the rear end of the second section to the outer diameter of the front end of the second section is in the range of (1.1: 1) to (8: 1).
2. The horn of claim 1, wherein the ratio of the axial length of said first section to the axial length of said second section ranges from (1:0.8) to (1:1.2), and the ratio of the outer diameter of the rear end of said second section to the outer diameter of the front end of said second section ranges from (1.5:1) to (2: 1).
3. The horn of claim 1, wherein the axial length of the first segment and the axial length of the second segment are substantially the same and are from 50 mm to 70 mm;
the outer diameter of the rear end of the second section is 45 mm-60 mm, and the outer diameter of the front end of the second section is 25 mm-35 mm.
4. The horn of claim 1, wherein the outer peripheral surface of said second section is contoured to form a catenary surface.
5. The horn of claim 1 wherein the outer periphery of the location where said first section joins said second section is provided with an annular flange.
6. The horn of claim 5 wherein a plurality of mounting slots are circumferentially spaced along the outer periphery of said annular flange.
7. The horn of claim 6, wherein the forward end of said first section defines an annular groove adjacent the outer periphery of said annular flange.
8. The horn of claim 1 wherein the front end of the second section defines a first connecting bore; and/or
And the rear end of the first section is provided with a second connecting hole.
9. The horn of claim 1, wherein the outer circumference of the forward end of the second section is configured as a nut structure.
10. An ultrasonic welding apparatus comprising a horn according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020774418.9U CN211334615U (en) | 2020-05-11 | 2020-05-11 | Amplitude transformer and ultrasonic welding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020774418.9U CN211334615U (en) | 2020-05-11 | 2020-05-11 | Amplitude transformer and ultrasonic welding device |
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| CN211334615U true CN211334615U (en) | 2020-08-25 |
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| CN202020774418.9U Active CN211334615U (en) | 2020-05-11 | 2020-05-11 | Amplitude transformer and ultrasonic welding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112809219A (en) * | 2021-02-05 | 2021-05-18 | 大连交通大学 | Ultrasonic friction stir welding composite welding system |
| CN113210679A (en) * | 2021-06-29 | 2021-08-06 | 深圳市金洲精工科技股份有限公司 | Drilling tool and design method thereof |
-
2020
- 2020-05-11 CN CN202020774418.9U patent/CN211334615U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112809219A (en) * | 2021-02-05 | 2021-05-18 | 大连交通大学 | Ultrasonic friction stir welding composite welding system |
| CN113210679A (en) * | 2021-06-29 | 2021-08-06 | 深圳市金洲精工科技股份有限公司 | Drilling tool and design method thereof |
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Effective date of registration: 20210225 Address after: 510663 Room 401, building B, 6 Nanyun 2nd Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: CONPROFE TECHNOLOGY GROUP Co.,Ltd. Patentee after: SMARTGUY INTELLIGENT EQUIPMENT Co.,Ltd. Patentee after: SMARTGUY INTELLIGENT EQUIPMENT Co.,Ltd. GUANGZHOU BRANCH Address before: 510663 the first and second floors of the portal crane building (Block C), Pinyao Electronic Industrial Park, No.8, Nanyun 2nd Road, Science City, Guangzhou high tech Industrial Development Zone, Guangzhou, Guangdong Province Patentee before: CONPROFE TECHNOLOGY GROUP Co.,Ltd. |