Tool head for ultrasonic welding and ultrasonic welding device

Abstract

The present invention provides a tool head and an ultrasonic welding device for ultrasonic welding, wherein the tool head includes a main vibration arm; the tool head mounting portion of the horn of the ultrasonic device is vertically mounted on the middle of the main vibration arm, and the main vibration arm is used to convert the longitudinal vibration transmitted by the transducer of the ultrasonic device to the horn into bending vibration, so that the welding structures at both ends of the main vibration arm can be used to perform ultrasonic welding on the workpiece to be processed. The tool head of the present invention can convert the longitudinal vibration of the horn into bending vibration through the main vibration arm by setting the main vibration arm, so that the welding structures at both ends of the main vibration arm can be used to perform ultrasonic welding on the workpiece to be processed that needs to be welded at intervals; from the perspective of effective energy output, the tool head of the present invention only outputs energy in the local welding structure area instead of the entire working surface, which has energy-saving effect compared with the overall tool head, so the tool head of the present invention has high energy saving and applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic welding, and in particular relates to a tool head for ultrasonic welding and an ultrasonic welding device. Background Art

[0002] At present, in the application field of ultrasonic welding, the tool (welding) head with integral longitudinal vibration is generally used. Since the weld intervals of the workpieces to be processed involved in actual applications are relatively large, for example, when ultrasonic welding is required for non-woven masks or diapers, the working surface of the tool welding head with integral longitudinal vibration will be made into a narrow rectangular surface for the workpieces to be processed, which may have an adverse effect on the main use area of ​​the workpieces to be processed, while the actual working area is concentrated on the two edge areas of the narrow rectangle; it can be seen that the current integral longitudinal vibration tool welding head is not suitable for processing the workpieces to be processed with large weld intervals. Therefore, how to realize the welding processing of the workpieces to be welded with large weld intervals needs to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in view of the problem that the integral longitudinal vibration tool head commonly used in existing ultrasonic welding causes a narrow and long rectangular surface on the workpiece to be processed, a tool head and an ultrasonic welding device for ultrasonic welding are proposed, so that the tool head can realize welding processing on idle workpieces with larger intervals.

[0004] A first aspect of the present invention provides a tool head for ultrasonic welding, wherein the tool head comprises a main vibration arm;

[0005] The tool head mounting part of the horn of the ultrasonic device is vertically mounted on the middle of the main vibration arm, and the main vibration arm is used to convert the longitudinal vibration transmitted to the horn by the transducer of the ultrasonic device into bending vibration, so that the welding structure at both ends of the main vibration arm can perform ultrasonic welding on the workpiece through the bending vibration.

[0006] Optionally, the tool head further comprises at least two side vibration arms;

[0007] The at least two side vibration arms are arranged below the main vibration arm at intervals;

[0008] The main vibration arm is also used to output the bending vibration to the at least two side vibration arms, and the at least two side vibration arms are respectively used to convert and amplify the bending vibration input by the main vibration arm, and to perform ultrasonic welding on the workpiece with the converted and amplified bending vibration.

[0009] Optionally, the at least two side vibration arms include a first side vibration arm and a second side vibration arm;

[0010] One end of the main vibration arm is arranged at the middle of the first side vibration arm;

[0011] The other end of the main vibration arm is arranged at the middle of the second side vibration arm.

[0012] Optionally, the main vibration arm is set to a convex structure, and the main vibration arm is obtained by cutting and processing based on a rectangular beam structure or a cross beam structure;

[0013] The two ends of the first side vibration arm are respectively provided with a side arm first groove structure and a side arm second groove structure;

[0014] A side arm third groove structure and a side arm fourth groove structure are respectively provided on both ends of the second side vibration arm.

[0015] Optionally, the right-angled connections on both sides of the convex structure are respectively provided with a first chamfer and a second chamfer.

[0016] Optionally, a tool head mounting hole is provided on the tool head mounting portion;

[0017] A first mounting hole matching the mounting hole of the tool head is provided in the middle of the main vibration arm;

[0018] The tool head mounting hole and the first mounting hole are connected by screws or studs.

[0019] Optionally, both ends of the main vibration arm are further provided with a first mounting portion and a second mounting portion, respectively, the first mounting portion is provided with a first main arm mounting hole, and the second mounting portion is provided with a second main arm mounting hole;

[0020] The first side arm is provided with a first side arm mounting hole matching the first main arm mounting hole, and the second side arm is provided with a second side arm mounting hole matching the second main arm mounting hole;

[0021] The first main arm mounting hole and the first side arm mounting hole are connected by a first fastener;

[0022] The second main arm mounting hole and the second side arm mounting hole are connected by a second fastener.

[0023] Optionally, a main arm protrusion structure is also provided in the middle of the main vibration arm.

[0024] Optionally,

[0025] A first groove structure of the main arm is further provided below the first mounting portion, and a first protrusion structure matching the first groove structure of the main arm is provided on the first side vibration arm, and the first groove structure and the first protrusion structure are matched and connected;

[0026] A second groove structure of the main arm is also provided below the second mounting portion, and a second protrusion structure matching the second groove structure of the main arm is provided on the second side vibration arm, and the second groove structure and the second protrusion structure are matched and connected.

[0027] Optionally,

[0028] A first welding boss and a second welding boss for welding are also provided below the first side vibration arm;

[0029] A third welding boss and a fourth welding boss for welding are also provided below the second side vibration arm.

[0030] A second aspect of the present invention provides an ultrasonic welding device, comprising a transducer, a horn, and a tool head as described in any one of the first aspects.

[0031] The present invention provides a tool head for ultrasonic welding and an ultrasonic welding device, wherein the tool head includes a main vibration arm; the tool head mounting portion of the amplitude transformer of the ultrasonic device is vertically mounted on the middle of the main vibration arm, and the main vibration arm is used to convert the longitudinal vibration transmitted to the amplitude transformer by the transducer of the ultrasonic device into bending vibration, so that the welding structure at both ends of the main vibration arm through the bending vibration can perform ultrasonic welding on the workpiece to be processed.

[0032] The tool head of the present invention can convert the longitudinal vibration of the amplitude transformer into bending vibration through the main vibration arm by setting the main vibration arm, so that the welding structure at both ends of the main vibration arm can be realized through the bending vibration, and ultrasonic welding can be performed on the workpieces to be processed that require interval welding; from the perspective of effective energy output, the tool head of the present invention only outputs energy in the local welding structure area instead of outputting energy on the entire working surface, which has an energy-saving effect compared to the overall tool head. Therefore, the tool head of the present invention has higher energy saving and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 is a stereogram provided by a tool head according to an embodiment of the present invention;

[0035] Figure 2 is another stereoscopic view provided by a tool head according to an embodiment of the present invention;

[0036] Figure 3 is an exploded view of a tool head provided by an embodiment of the present invention;

[0037] Figure 4 is a front view of a tool head provided by an embodiment of the present invention;

[0038] Figure 5 is a side view of a tool head provided in one embodiment of the present invention;

[0039] Figure 6 is a bottom view of a tool head provided by an embodiment of the present invention;

[0040] Figure 7 It is a top view provided by a tool head according to an embodiment of the present invention.

[0041] The accompanying drawings in the specification are as follows:

[0042] 1-main arm; 11-first mounting hole; 12-first main arm mounting hole; 13-second main arm mounting hole; 14-first chamfer; 15-second chamfer; 16-main arm protrusion structure; 17-main arm first groove structure; 18-main arm second groove structure;

[0043] 2-first side vibration arm; 21-first groove structure of the side arm; 22-second groove structure of the side arm; 23-first side arm mounting hole; 24-first protrusion structure; 25-first welding boss; 26-second welding boss;

[0044] 3-second side vibration arm; 31-third groove structure of the side arm; 32-fourth groove structure of the side arm; 33-second side arm mounting hole; 34-second protruding structure; 35-third welding boss; 36-fourth welding boss;

[0045] 4-horn;

[0046] 5- Transducer. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The present invention provides a tool head for ultrasonic welding. In an application scenario, the tool head can be assembled in a tool head mounting portion of a horn of an ultrasonic device so that the tool head can ultrasonically weld products such as masks, diapers or sanitary napkins with non-woven fabrics as base materials.

[0052] In one embodiment, the tool head includes a main vibration arm 1, and the main vibration arm 1 can be selected from a structure such as a rectangular beam or a cross beam; the horn 4 of the ultrasonic device and the main vibration arm 1 can be installed in the following manner: Specifically, Figure 1 As shown, the tool head mounting portion of the horn 4 of the ultrasonic device is vertically mounted on the middle of the main vibration arm 1. In this embodiment, the transducer 5 of the ultrasonic device can be used to convert the input electrical power into mechanical power of longitudinal vibration, and to transmit the longitudinal vibration to the horn 4, so that the horn 4 amplifies the amplitude of the longitudinal vibration and transmits it to the main vibration arm 1. In specific implementation, the longitudinal vibration frequency of the transducer 5 and the bending vibration of the main vibration arm 1 can be set to the same natural frequency, so that when vibrating at the same natural frequency, the bending vibration of the main vibration arm 1 at the natural frequency can be stimulated. Then, the longitudinal vibration of the horn 4 can be converted into bending vibration through the main vibration arm 1, so that the welding structure at both ends of the bending vibration main vibration arm 1 (not shown in the figure) can be used to perform ultrasonic welding on the workpiece. In this embodiment, by setting up the main vibration arm, the longitudinal vibration of the amplitude transformer can be converted into bending vibration through the main vibration arm 1, so that the welding structure at both ends of the main vibration arm can be realized through the bending vibration, and ultrasonic welding can be performed on the workpiece to be processed that requires interval welding; from the perspective of effective energy output, the tool head provided in this embodiment only outputs energy in the local welding structure area instead of outputting energy on the entire working surface, which has an energy-saving effect compared to the overall tool head, and has higher energy saving and applicability.

[0053] In one embodiment, Figure 2-Figure 7 As shown, the tool head also includes at least two side vibration arms. Among them, at least two side vibration arms are arranged below the main vibration arm 1 at intervals, and the distance of the intervals can be set according to the distance that needs to be processed for the workpiece to be processed, which is not limited here. Specifically, the main vibration arm is also used to output the bending vibration to the at least two side vibration arms, and the at least two side vibration arms are respectively used to convert and amplify the bending vibration input by the main vibration arm, and to use the converted and amplified bending vibration to ultrasonically weld the workpiece to be processed. In this embodiment, at least two side vibration arms are respectively used to convert and amplify the bending vibration input by the main vibration arm 1, and to use the converted and amplified bending vibration to ultrasonically weld the workpiece to be processed on the workbench. It can be understood that by setting up the matching structure of the main vibration arm 1 and at least two side vibration arms, and vertically installing the amplitude change rod 4 in the middle of the main vibration arm 1, the main vibration arm 1 can generate bending vibration under the transmission of longitudinal vibration of the amplitude change rod 4, and transmit the bending vibration to at least two side vibration arms set at intervals through the main vibration arm 1, so that at least two side vibration arms will convert and amplify the bending vibration to process the workpiece to be processed, so that the side vibration arms set at intervals can be used to weld the workpieces that require interval welding, thereby improving the applicability of the ultrasonic welding device.

[0054] In one embodiment, Figure 2-Figure 7 As shown, two side vibration arms can be provided, specifically, at least two side vibration arms include a first side vibration arm 2 and a second side vibration arm 3; wherein, one end of the main vibration arm 1 is provided at the middle of the first side vibration arm 2, and the other end of the main vibration arm 1 is provided at the middle of the second side vibration arm 3. In this embodiment, by providing two side vibration arms, in an application scenario, for example, when the ears on both sides of the mask need to be welded, the ears on both sides of the mask can be welded and formed at one time through the two side vibration arms, so as to improve production efficiency.

[0055] It should be noted that the two side vibration arms in the above embodiment are only one of the embodiments, and specifically, three, four or five side vibration arms can also be provided, which can be specifically provided according to actual processing needs and is not limited here. To avoid redundancy, the description will not be expanded here.

[0056] In one embodiment, Figure 2-Figure 4As shown, specifically, the main vibration arm 1 can be set as a convex-shaped structure; specifically, the main vibration arm 1 can select a structure such as a rectangular beam or a cross beam, and cut and process on the rectangular beam, so that the main vibration arm 1 can form a convex-shaped structure. The first side vibration arm 2 is provided with a first side arm groove structure 21 and a second side arm groove structure 22 at both ends; the second side vibration arm 3 is provided with a third side arm groove structure 31 and a fourth side arm groove structure 32 at both ends. Specifically, the side vibration arm can select a structure such as a rectangular beam or a cross beam, and cut and groove on both ends of the cross beam, so that the groove structures are provided at both ends of the side vibration arm. As those skilled in the art know, the existing longitudinal vibration ultrasonic welding tool heads are generally large in size, use a lot of materials, and are time-consuming to process, resulting in high costs. In this embodiment, by setting the main vibration arm 1 to a convex structure and respectively providing groove structures at both ends of the first side vibration arm 2 and the second side vibration arm 3, not only can the main vibration arm 1 and the side vibration arm have the advantages of less material, simple processing, low manufacturing cost and light weight, but also the main vibration arm 1 and the side vibration arm can generate a natural frequency mode with double bending vibration through a certain natural frequency with the cooperation of the amplitude transformer 4, the main vibration arm 1 and the two side vibration arms, thereby realizing the ultrasonic welding of the workpiece by the spaced-apart side vibration arms.

[0057] In one embodiment, in order to enhance the stability of the right-angle connection on both sides of the convex structure, as shown in FIG. Figure 2-Figure 4 as well as Figure 7 As shown, the right-angled connections on both sides of the convex-shaped structure can be chamfered. Specifically, the right-angled connections on both sides of the convex-shaped structure are respectively provided with a first chamfer 14 and a second chamfer 15, wherein the first chamfer 14 and the second chamfer 15 can be, for example, an R chamfer or a C chamfer, etc., which are not limited here. In this embodiment, by chamfering the right-angled connections on both sides of the convex-shaped structure, it can be achieved that cracks are not allowed to appear at the connection, thereby increasing the stability of the main vibration arm.

[0058] In one embodiment, Figure 3 As shown, a tool head mounting hole (not shown in the figure) is provided on the tool head mounting portion; a first mounting hole 11 matching the tool head mounting hole is provided in the middle of the main oscillating arm 1; specifically, the tool head mounting hole and the first mounting hole 11 can be connected by means of screws or studs, etc. Among them, the screw can be a fastening screw, and the stud can be a stud stud, etc. It can be understood that both the tool head mounting hole and the first mounting hole 11 can be provided with internal threads, and the horn 4 can be vertically arranged in the middle of the main oscillating arm 1 through the external threads on the stud stud.

[0059] In one embodiment, Figure 3As shown, the two ends of the main boom 1 are also provided with a first mounting portion and a second mounting portion, respectively. The first mounting portion is provided with a first main arm mounting hole 12, and the second mounting portion is provided with a second main arm mounting hole 13; the first side boom 2 is provided with a first side arm mounting hole 23 matching the first main arm mounting hole 12, and the second side boom 3 is provided with a second side arm mounting hole 33 matching the second main arm mounting hole 13. Specifically, the first main arm mounting hole 12 and the first side arm mounting hole 23 are connected by a first fastener; the second main arm mounting hole 13 and the second side arm mounting hole 33 are connected by a second fastener. Specifically, the fastener can be a bolt or a stud, etc., which is not limited here. In this embodiment, by respectively providing mounting holes on the main boom 1 and the side boom, and connecting the main boom 1 and the side boom by means such as bolts, the installation of the main boom 1 and the side boom can be made simpler and more secure, and it is convenient for daily disassembly, assembly, maintenance and replacement.

[0060] In one embodiment, specifically, Figure 3 As shown, a main arm protrusion structure 16 may also be provided in the middle of the main arm 1. In this embodiment, by providing a protrusion structure in the middle of the main arm 1, the protrusion structure can act as a gasket, so that the amplitude transformer 4 can be better installed on the main arm 1.

[0061] In the above-mentioned embodiment, the main vibration arm 1 and the side vibration arm are connected by means of bolts, etc., and the main vibration arm 1 and the side vibration arm may slip during the processing when the main vibration arm 1 and the side vibration arm are actually working in a high-frequency vibration process. In order to solve this problem, in one embodiment, Figure 3 As shown, a main arm first groove structure 17 is also provided below the first mounting portion, a first protrusion structure 24 matching the main arm first groove structure 17 is provided on the first side arm 2, and the main arm first groove structure 17 and the first protrusion structure 24 are matched and connected; a main arm second groove structure 18 is also provided below the second mounting portion, a second protrusion structure 34 matching the main arm second groove structure 18 is provided on the second side arm 3, and the main arm second groove structure 18 and the second protrusion structure 34 are matched and connected. In this embodiment, by providing a groove structure below the mounting portion of the main arm 1 and providing a protrusion structure matching the groove structure on the side arm, the main arm 1 and the side arm can be better fixedly connected.

[0062] It should be noted that the "main arm first groove structure 17 is also provided below the first mounting portion" in the above embodiment is only for example, and a main arm protrusion structure 16 may also be provided below the first mounting portion, and a side arm groove structure matching the main arm protrusion structure 16 may be provided on the side arm, which is not limited here. To avoid redundancy, it will not be described in detail here.

[0063] In one embodiment, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a first welding boss 25 and a second welding boss 26 for welding are also provided below the first side arm 2; a third welding boss 35 and a fourth welding boss 36 for welding are also provided below the second side arm 3. Specifically, the position of the welding boss can be set according to the processing position of the workpiece to be processed, and the welding boss can be formed by, for example, cutting the side arm to form a welding boss at the corresponding position. In the above-mentioned embodiment, by providing a welding boss structure below the side arm, it can be set accordingly according to the processing position of the workpiece to be processed, so as to improve the flexibility and applicability of the tool head.

[0064] The second aspect of the present invention further provides an ultrasonic welding device, wherein the ultrasonic welding device comprises a transducer 5, a horn 4 and a tool head in any of the above embodiments. In this embodiment, through the tool head in the above embodiment, the ultrasonic welding device can realize ultrasonic welding of workpieces with a required spacing distance, and at the same time, the applicability and flexibility of the ultrasonic welding device can be improved.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool head for ultrasonic welding, characterized in that: The tool head includes a main vibration arm; The tool head mounting portion of the horn of the ultrasonic device is vertically mounted on the middle of the main vibration arm, and the main vibration arm is used to convert the longitudinal vibration transmitted by the transducer of the ultrasonic device to the horn into bending vibration, so that the welding structures at both ends of the main vibration arm can be ultrasonically welded to the workpiece through the bending vibration; Wherein, the tool head further comprises at least two side vibration arms; The at least two side vibration arms are arranged below the main vibration arm at intervals; The main vibration arm is also used to output the bending vibration to the at least two side vibration arms, and the at least two side vibration arms are respectively used to convert and amplify the bending vibration input by the main vibration arm, and to use the converted and amplified bending vibration to perform ultrasonic welding on the workpiece; Wherein, the at least two side vibration arms include a first side vibration arm and a second side vibration arm; One end of the main vibration arm is arranged at the middle of the first side vibration arm; The other end of the main vibration arm is arranged at the middle of the second side vibration arm; Wherein, the main vibration arm is set as a convex-shaped structure, and the main vibration arm is obtained by cutting and processing based on a rectangular beam structure or a cross beam structure; The two ends of the first side vibration arm are respectively provided with a side arm first groove structure and a side arm second groove structure; A side arm third groove structure and a side arm fourth groove structure are respectively provided on both ends of the second side vibration arm.

2. The tool head according to claim 1, characterized in that: The right-angled connection parts on both sides of the convex structure are respectively provided with a first chamfer and a second chamfer.

3. The tool head according to claim 1, characterized in that: The tool head mounting portion is provided with a tool head mounting hole; A first mounting hole matching the mounting hole of the tool head is provided in the middle of the main vibration arm; The tool head mounting hole and the first mounting hole are connected by screws or studs.

4. The tool head according to claim 1, characterized in that: The two ends of the main vibration arm are also provided with a first mounting portion and a second mounting portion respectively, the first mounting portion is provided with a first main arm mounting hole, and the second mounting portion is provided with a second main arm mounting hole; The first side arm is provided with a first side arm mounting hole matching the first main arm mounting hole, and the second side arm is provided with a second side arm mounting hole matching the second main arm mounting hole; The first main arm mounting hole and the first side arm mounting hole are connected by a first fastener; The second main arm mounting hole and the second side arm mounting hole are connected by a second fastener.

5. The tool head according to claim 4, characterized in that: A first groove structure of the main arm is further provided below the first mounting portion, and a first protrusion structure matching the first groove structure of the main arm is provided on the first side vibration arm, and the first groove structure and the first protrusion structure are matched and connected; A second groove structure of the main arm is also provided below the second mounting portion, and a second protrusion structure matching the second groove structure of the main arm is provided on the second side vibration arm, and the second groove structure and the second protrusion structure are matched and connected.

6. The tool head according to any one of claims 2 to 5, characterized in that: A first welding boss and a second welding boss for welding are also provided below the first side vibration arm; A third welding boss and a fourth welding boss for welding are also provided below the second side vibration arm.

7. An ultrasonic welding device, characterized in that: The ultrasonic welding device comprises a transducer, a horn and a tool head as described in any one of claims 1 to 6.

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