High-power ultrasonic welding machine

Abstract

The utility model discloses a high-power ultrasonic welding machine which comprises a base, a vertical motion driving unit, a connecting unit, an ultrasonic welding unit and a welding table, and the vertical motion driving unit and the connecting unit are respectively installed on the base. The ultrasonic welding unit is fixedly connected to the connecting unit, the axial direction of the ultrasonic welding unit is perpendicular to the vertical direction, and the output end of the vertical movement driving unit is connected with the connecting unit so as to drive the whole ultrasonic welding unit to move in the vertical direction. The ultrasonic welding unit can conduct ultrasonic vibration in the axial direction of the ultrasonic welding unit, and the ultrasonic welding unit is correspondingly arranged above the welding table so as to be used for welding a workpiece. The high-power ultrasonic welding machine provided by the utility model can stably provide high pressure, and ultrasonic can still output stable amplitude.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic processing, in particular to a high-power ultrasonic welder. Background Art

[0002] Ultrasonic welding is a special connection technology and has been widely used in industry. It has a wide range of applications in the electronic industry, electrical appliance manufacturing, preparation of new materials, aerospace and nuclear power industries, food packaging boxes, and sealing technology of high-grade parts. Ultrasonic metal welding has outstanding advantages such as energy conservation, environmental protection, and convenient operation. Ultrasonic metal welding in ultrasonic welding utilizes the mechanical vibration energy of ultrasonic frequency to generate high-frequency mutual friction under pressure to generate high temperature, so that the molecular layers are fused with each other, so as to achieve the purpose of strong connection. It is commonly used for connection between metals and between metal and wire harness. The welding strength is related not only to the transducer outputting ultrasonic waves, but also to the pressure applied to the welded object during welding. In order to ensure the stable operation of ultrasonic waves in traditional ultrasonic welding, the welding machine has a small pressure and can only weld small parts, and it is difficult to output high power. Therefore, it is necessary to study a high-power ultrasonic welder that can stably provide a large pressure and the ultrasonic waves can still output a stable amplitude to solve the problems existing in the above related technologies.

[0003] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the utility model, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and creativity of this application. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a high-power ultrasonic welder that can stably provide a large pressure and the ultrasonic waves can still output a stable amplitude.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model discloses a high-power ultrasonic welder, which includes a base, a vertical motion driving unit, a connecting unit, an ultrasonic welding unit, and a welding table. The vertical motion driving unit and the connecting unit are respectively installed on the base. The ultrasonic welding unit is fixedly connected to the connecting unit and the axial direction of the ultrasonic welding unit is perpendicular to the vertical direction. The output end of the vertical motion driving unit is connected to the connecting unit to drive the whole ultrasonic welding unit to move in the vertical direction. The ultrasonic welding unit can ultrasonically vibrate along its own axial direction, and the ultrasonic welding unit is correspondingly arranged above the welding table for welding workpieces.

[0007] Preferably, the vertical motion driving unit adopts a pneumatic driving component.

[0008] Preferably, the connecting unit includes a connecting piece, a guide rail slider, a movable plate, and a fixing piece. The ultrasonic welding unit is fixedly connected to the movable plate through the fixing piece. The movable plate is slidably connected to the guide rail slider in the vertical direction, and the movable plate is connected to the output end of the vertical motion driving unit through the connecting piece.

[0009] Preferably, the ultrasonic welding unit includes an ultrasonic transducer, a horn, a mounting rod, and a welding head assembly. The first end of the horn is connected to the output end of the ultrasonic transducer, the second end of the horn is connected to the mounting rod, the welding head assembly is mounted on the mounting rod, and the upper end of the welding head assembly is fixedly connected to the connecting unit.

[0010] Preferably, the mounting rod includes a transition rod and a counterweight rod. The welding head assembly is mounted between the transition rod and the counterweight rod, and the two ends of the transition rod are respectively connected to the horn and the counterweight rod.

[0011] Preferably, the welding head assembly includes a welding head and a fixing unit. The fixing unit is connected above the mounting rod and fixedly connected to the connecting unit. The welding head is connected below the mounting rod and is correspondingly arranged above the welding table for welding workpieces.

[0012] Preferably, the fixing unit includes a fixing block and a shock-absorbing strip. The fixing block is fixedly connected to the connecting unit. The shock-absorbing strip is connected between the welding head and the fixing block, and the width of the shock-absorbing strip is smaller than the width of the fixing block.

[0013] Preferably, the number of the ultrasonic transducers is 1 to 6.

[0014] Preferably, the welding table includes a welding bottom die, a pressure sensor, and a sensor base. The pressure sensor is built in the sensor base, and the welding bottom die is arranged above the pressure sensor for placing workpieces to be welded.

[0015] Preferably, the welding table further includes an adapter. The adapter is fixedly arranged between the pressure sensor and the welding bottom die.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The high-power ultrasonic welder disclosed by the present utility model, in which the vertical motion driving unit can provide a large pressure in the vertical direction to the ultrasonic welding unit through the connecting unit, and the ultrasonic welding unit can perform ultrasonic vibration along its own axis to achieve friction welding of workpieces. The combination of these two motions enables the high-power ultrasonic welder to stably provide a large pressure, and the ultrasonic wave can still output a stable amplitude.

[0017] In a further embodiment, the present utility model further has the following beneficial effects:

[0018] (1) The vertical motion driving unit adopts a pneumatic driving component, and the pressure output by the pneumatic driving component is applied to the ultrasonic welding unit through the connecting unit, which can ensure the output of a large pressure.

[0019] (2) The ultrasonic welding unit is connected to a movable plate arranged on the guide rail slider, ensuring the stability and accuracy of the up and down movement of the ultrasonic welding unit.

[0020] (3) A fixing block is provided at the top of the welding head, and the fixing block is connected to the welding head through a shock-absorbing strip with a smaller width, which can reduce the loss of ultrasonic energy; moreover, when the ultrasonic welding unit is fixed to the connecting unit, it does not affect the transmission of ultrasonic waves, and the pressure is directly output on the workpiece on the welding table through the welding head, further making the output amplitude of the ultrasonic wave more stable while providing a large pressure.

[0021] (4) The number of ultrasonic transducers in the ultrasonic welding unit can be 1 to 6, and the number of ultrasonic transducers can be adjusted according to the required output power to achieve the purpose of increasing the output power.

[0022] (5) A pressure sensor is provided in the welding table, and the output pressure of the vertical motion driving unit can be feedback adjusted by obtaining the real-time welding pressure, so as to further achieve the precise output of a large pressure; further, a transfer member is also provided between the pressure sensor and the welding bottom die, which can avoid damage to the interface of the pressure sensor when the welding bottom die is disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the high-power ultrasonic welder according to Embodiment 1 of the present utility model;

[0024] Figure 2 is Figure 1 a side view of the high-power ultrasonic welder in

[0025] Figure 3 is Figure 1 a schematic structural diagram of the ultrasonic welding unit of the high-power ultrasonic welder in

[0026] Figure 4 isFigure 1 Schematic diagram of the welding table of a medium-high power ultrasonic welding machine;

[0027] Figure 5 It is the working flow chart of the high power ultrasonic welding machine in the first embodiment of the present invention;

[0028] Figure 6 It is the schematic diagram of the structure of the high power ultrasonic welding machine in the second embodiment of the present utility model. Detailed implementation manners

[0029] The following makes a detailed description of the implementation manners of the present utility model. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present utility model and its applications.

[0030] It should be noted that when an element is referred to as "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 "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing purposes or for circuit / signal communication purposes.

[0031] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0033] Such as Figure 1As shown in the figure, Embodiment 1 of the present utility model discloses a high-power ultrasonic welder, which includes a base 5, a vertical motion driving unit 4, a connecting unit 3, an ultrasonic welding unit 2 and a welding table 1. The vertical motion driving unit 4 and the connecting unit 3 are respectively installed on the base 5. The ultrasonic welding unit 2 is fixedly connected to the connecting unit 3 and the axial direction of the ultrasonic welding unit 2 is perpendicular to the vertical direction. The output end of the vertical motion driving unit 4 is connected to the connecting unit 3 to drive the whole ultrasonic welding unit 2 to move in the vertical direction. The ultrasonic welding unit 2 can ultrasonically vibrate along its own axial direction, and the ultrasonic welding unit 2 is correspondingly arranged above the welding table 1 for welding workpieces. Among them, the vertical motion driving unit 4 adopts a pneumatic driving part.

[0034] As Figure 2 , the connecting unit 3 includes a connecting piece 301, a guide rail slider 302, a movable plate 304 and a fixing piece. The ultrasonic welding unit 2 is fixedly connected to the movable plate 304 through the fixing piece. The movable plate 304 is slidably connected to the guide rail slider 302 in the vertical direction. The movable plate 304 is connected to the output end of the vertical motion driving unit 4 through the connecting piece 301, so that the pressure output by the vertical motion driving unit 4 is applied to the ultrasonic welding unit 2 through the connecting piece 301. Among them, the movable plate 304 is arranged on the guide rail slider 302, which ensures the stability of the downward movement of the ultrasonic welding unit 2. Specifically, the fixing piece includes a pressing block 303 and a fixing element 305. The pressing block 303 and the fixing element 305 respectively fix different parts of the ultrasonic welding unit 2 to stably fix the ultrasonic welding unit 2 to the movable plate 304.

[0035] As Figure 3As shown in the figure, the ultrasonic welding unit 2 includes an ultrasonic transducer 201, a horn 202, a mounting rod, and a welding head assembly 204. The first end of the horn 202 is connected to the output end of the ultrasonic transducer 201, the second end of the horn 202 is connected to the mounting rod, the welding head assembly 204 is mounted on the mounting rod, and the upper end of the welding head assembly 204 is fixedly connected to the connecting unit 3. Specifically, the mounting rod includes a transition rod 203 and a counterweight rod 205. The welding head assembly 204 is mounted between the transition rod 203 and the counterweight rod 205. The two ends of the transition rod 203 are respectively connected to the horn 202 and the counterweight rod 205. The welding head assembly 204 includes a welding head 2041 and a fixing unit 2042. The fixing unit 2042 is connected above the middle of the transition rod 203 and the counterweight rod 205 and is fixedly connected to the connecting unit 3. The welding head 2041 is connected below the middle of the transition rod 203 and the counterweight rod 205 and is correspondingly arranged above the welding table 1 for welding workpieces. Specifically, the fixing unit 2042 includes a fixing block 20421 and a shock-absorbing strip 20422. The fixing block 20421 is fixedly connected to the movable plate 304 through a pressing block 303. The shock-absorbing strip 20422 is connected between the welding head 2041 and the fixing block 20421, and the width of the shock-absorbing strip 20422 is smaller than the width of the fixing block 20421. In this embodiment, the fixing block 20421 and the shock-absorbing strip 20422 are of an integral structure. Further, the fixing block 20421, the shock-absorbing strip 20422, and the welding head 2041 are also of an integral structure. The integral structure is integrally fixed between the transition rod 203 and the counterweight rod 205 through internal bolts, and the transition rod 203 is fixed to the horn 202 through internal bolts. In this embodiment, the fixing block 20421 is fixedly connected to the movable plate 304 through a pressing block 303. The fixing block 20421 is far from the welding head 2041 and is connected through the shock-absorbing strip 20422 with a reduced width, which can reduce the high-frequency vibration of the fixing block 20421.

[0036] The ultrasonic transducer 201 includes a front cover plate 2011, an electrode plate 2012, a piezoelectric ceramic plate 2013, a rear cover plate 2014, and a screw 2015. The piezoelectric ceramic plate 2013 generates high-frequency ultrasonic vibration, transmits ultrasonic energy through the horn 202 and the transition rod 203 to the welding head 2041, drives the welding head 2041 to achieve high-frequency vibration along the axial direction of the horn 202, and realizes friction welding of workpieces. In this embodiment, the number of ultrasonic transducers 201 is two, and the two ultrasonic transducers 201 are respectively fixedly connected to the horn 202 through internal bolts.

[0037] As Figure 4As shown in the figure, the soldering table 1 includes a soldering bottom mold 101, an adapter 102, a pressure sensor 103, and a sensor base 104. The pressure sensor 103 is built into the sensor base 104. The pressure sensor 103 is fixedly connected to the soldering bottom mold 101 through the adapter 102 to obtain the pressure received by the soldering bottom mold 101. Among them, the adapter 102, as an intermediate part, fixedly connects the soldering bottom mold 101 and the pressure sensor 103, which can avoid damage to the interface of the pressure sensor 103 caused by frequent disassembly of the soldering bottom mold 101.

[0038] As Figure 5 shown, the working process of the high-power ultrasonic welder in this embodiment is as follows: The high-power ultrasonic welder performs a self-check when it is turned on, and checks whether the electronic components work normally after being powered on. If some electronic components are abnormal, an alarm will be prompted through the control panel. The pressure, welding time, welding times, and output energy can be preset on the control panel of the machine according to the requirements of the welder; after the preparation work is completed, the high-power ultrasonic welder is started to work through the control key. The vertical movement driving unit 4 on the high-power ultrasonic welder drives the ultrasonic welding unit 2 to perform a downward pressing movement. When the displacement sensor built in the high-power ultrasonic welder detects that the welding head 2041 is approaching the item to be welded, the ultrasonic welding unit 2 turns on the ultrasound; during welding, the pressure is detected in real time through the pressure sensor 103, and the working frequency of the ultrasonic welding unit 2 is adjusted according to the change of the pressure of the welding head 2041, so that the ultrasonic welding unit 2 always works at the best resonance point and outputs the maximum power all the time during the welding process; after reaching the set welding time, the ultrasound stops emitting waves and the cylinder resets. If the welding times have not been reached, the above steps are repeated; after welding is completed, the actual welding pressure, welding time, output energy, etc. are displayed on the control panel, and the actual information parameters during welding are fed back.

[0039] As Figure 6 shown, the high-power ultrasonic welder disclosed in the second embodiment of the present invention is different from the first embodiment only in that the number of ultrasonic transducers 201 in this embodiment is three, and the power of ultrasonic vibration is increased by increasing the number of ultrasonic transducers 201. In some other embodiments, the number of ultrasonic transducers 201 can also be one, four or more, and it is preferably no more than six.

[0040] The high-power ultrasonic welding machine provided by each embodiment of the present utility model, the pressure output by the pneumatic driving member (vertical motion driving unit 4) is applied to the ultrasonic welding unit 2 through the connecting unit 3. The ultrasonic welding unit 2 ensures the stability and accuracy of the up-and-down motion under large pressure through the mechanism of the guide rail slider 302; a pressure sensing device is provided on the welding table, and the output pressure of the pneumatic driving member (vertical motion driving unit 4) can be feedback adjusted by obtaining the real-time welding pressure, so as to achieve the precise output of large pressure; a fixing block 20421 is provided at the top of the welding head 2041, and the area of the fixing block 20421 is far from the vibration area of the welding head 2041. The damping strip 20422 is connected to the fixing block 20421 after reducing the width, reducing the loss of ultrasonic energy. When the ultrasonic welding unit 2 is fixed to the connecting unit 3, it does not affect the transmission of ultrasonic waves. The pressure is directly output on the workpiece of the welding bottom die 101 through the welding head 2041, and stable amplitude can still be output while providing large pressure. The number of ultrasonic transducers 201 on the ultrasonic welding unit 2 is two or three, and the number of ultrasonic transducers 201 can be adjusted according to the required output power, so as to achieve the purpose of increasing the output power.

[0041] The background part of the present utility model may include background information about the problems or environment of the present utility model, rather than the prior art described by others. Therefore, the content included in the background art section is not an admission by the applicant of the prior art.

[0042] The above content is a further detailed description of the present utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several alternatives or modifications can be made to these described embodiments, and these alternative or modified ways should all be regarded as belonging to the protection scope of the present utility model. In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope defined by the appended claims.

Claims

1. A high-power ultrasonic welding machine, characterized in that: The invention comprises a base, a vertical motion driving unit, a connecting unit, an ultrasonic welding unit and a welding table, wherein the vertical motion driving unit and the connecting unit are respectively installed on the base, the ultrasonic welding unit is fixedly connected to the connecting unit and the axial direction of the ultrasonic welding unit is perpendicular to the vertical direction, the output end of the vertical motion driving unit is connected to the connecting unit to drive the ultrasonic welding unit to move in the vertical direction as a whole, the ultrasonic welding unit can ultrasonically vibrate in its own axial direction, and the ultrasonic welding unit is correspondingly arranged above the welding table to weld the workpiece; Wherein, the ultrasonic welding unit includes an ultrasonic transducer, a variable amplitude rod, a mounting rod and a welding head assembly, the first end of the variable amplitude rod is connected to the output end of the ultrasonic transducer, the second end of the variable amplitude rod is connected to the mounting rod, the welding head assembly is installed on the mounting rod, and the upper end of the welding head assembly is fixedly connected to the connecting unit.

2. The high-power ultrasonic welder according to claim 1, characterized in that: The vertical motion driving unit adopts a pneumatic driving member.

3. The high-power ultrasonic welder according to claim 1, characterized in that: The connecting unit includes a connecting piece, a guide rail slider, a movable plate, and a fixing piece. The ultrasonic welding unit is fixedly connected to the movable plate via the fixing piece. The movable plate can be slidably connected to the guide rail slider in a vertical direction. The movable plate is connected to the output end of the vertical motion driving unit via the connecting piece.

4. The high-power ultrasonic welder according to claim 1, characterized in that: The mounting rod comprises a transition rod and a counterweight rod, the welding head assembly is installed between the transition rod and the counterweight rod, and two ends of the transition rod are respectively connected to the amplitude changing rod and the counterweight rod.

5. The high-power ultrasonic welder according to claim 1, characterized in that: The welding head assembly includes a welding head and a fixing unit, wherein the fixing unit is connected to the top of the mounting rod and fixedly connected to the connecting unit, and the welding head is connected to the bottom of the mounting rod and is correspondingly arranged above the welding table for welding the workpiece.

6. The high-power ultrasonic welder according to claim 5, characterized in that: The fixing unit comprises a fixing block and a shock absorbing strip, wherein the fixing block is fixedly connected to the connecting unit, the shock absorbing strip is connected between the welding head and the fixing block, and the width of the shock absorbing strip is smaller than the width of the fixing block.

7. The high-power ultrasonic welder according to claim 1, characterized in that: The number of the ultrasonic transducers is 1 to 6.

8. The high-power ultrasonic welder according to claim 1, characterized in that: The welding table comprises a welding bottom mold, a pressure sensor and a sensor base. The pressure sensor is built in the sensor base. The welding bottom mold is arranged above the pressure sensor to place a workpiece to be welded.

9. The high-power ultrasonic welder according to claim 8, characterized in that: The welding platform also includes a transfer component, and the transfer component is fixedly arranged between the pressure sensor and the welding bottom mold.

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