Ultrasonic welding jig and ultrasonic welding machine

Abstract

This utility model belongs to the field of ultrasonic welding technology and discloses an ultrasonic welding fixture and an ultrasonic welding machine. The ultrasonic welding fixture includes a loading component, a heating component, and a pressurizing component. The loading component includes a mounting base plate and a support platform, with the support platform connected to the mounting base plate. The support platform has a first contour groove and a second contour groove. The heating component includes a heating element for heating the first and second contour grooves. The pressurizing component includes a pressure plate, a pressure ring, and a lifting drive component. The pressure plate is vertically and vertically mounted on the mounting base plate along a first direction. The pressure ring is used to press the plastic workpiece, and the lifting drive component is used to drive the pressure plate to move up and down. By using the heating element to heat the plastic workpiece to increase molecular activity, and using the pressure ring to press the overlapping area between two plastic workpieces, the degree of fusion is increased, thereby enhancing the welding strength and improving the welding effect. This not only avoids structural weight increase but also overcomes the problems of weak welding strength and poor welding effect without the use of separate energy-conducting ribs.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic welding technology, and in particular to an ultrasonic welding fixture and an ultrasonic welding machine. Background Technology

[0002] Currently, in industries such as medical devices, hygiene products, automobiles, and lighting, ultrasonic welding of plastics / composite materials commonly employs design methods such as sharp corners, protrusions, pits, and self-locking rings. These methods create a structure on the workpiece to be welded that allows ultrasonic waves to converge, thereby ensuring the structural strength and welding effect after ultrasonic welding.

[0003] However, in the civil aviation field, since the design structure of the parts cannot be changed, it is impossible to process the structure for converging ultrasonic waves on the workpiece to be welded. Therefore, additional separate energy-conducting ribs are usually used to converge the ultrasonic vibration energy to achieve welding.

[0004] However, adding separate energy-conducting ribs not only increases the structural weight, but also causes material incompatibility issues because the materials of the energy-conducting ribs and the materials of the parts to be welded may differ. If separate energy-conducting ribs are not used, the welding strength and welding effect will be weak. Utility Model Content

[0005] The purpose of this invention is to provide an ultrasonic welding fixture and an ultrasonic welding machine that not only eliminates the need for separate energy-conducting ribs, thus avoiding structural weight increase, but also enhances welding strength and improves welding effect without the need for separate energy-conducting ribs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, an ultrasonic welding fixture is provided for welding plastic workpieces, comprising:

[0008] The loading assembly includes a mounting base plate and a support platform. The mounting base plate is connected to an ultrasonic welding machine, and the support platform is connected to the mounting base plate. The support platform has a first contour groove and a second contour groove. Two plastic workpieces to be welded are placed in the first contour groove and the second contour groove, respectively. The depth of the first contour groove is greater than the depth of the second contour groove, so that an overlapping area for welding is formed between the two plastic workpieces.

[0009] A heating assembly, comprising a heating element inserted into the support platform and used to heat the plastic workpiece in the first and second contouring grooves;

[0010] The pressure assembly includes a pressure plate, a pressure ring, and a lifting drive. The pressure plate is vertically and elliptically mounted on the mounting base plate along a first direction and has a working through hole corresponding to the welding head of the ultrasonic welding machine. The pressure ring is connected to the side of the pressure plate facing the support platform and has a central through hole communicating with the working through hole. The pressure ring is used to press the overlapping area. The lifting drive is connected to the mounting base plate and located on both sides of the support platform along a second direction. The lifting drive is used to drive the pressure plate to rise and fall.

[0011] Optionally, the support platform is further provided with a first mounting hole, a second mounting hole, and a third mounting hole. The heating element is inserted into both the first mounting hole and the second mounting hole. The first mounting hole is located below the first contoured groove, the second mounting hole is located below the second contoured groove, and the third mounting hole is located below the overlapping area. The heating assembly also includes a temperature detection element and a temperature controller. The temperature detection element is disposed in the third mounting hole and is used to transmit the detected temperature data to the temperature controller. The temperature controller is used to control the power supply of the heating element based on the temperature data.

[0012] Optionally, the distance between the third mounting hole and the first contoured groove along the first direction is L1, and satisfies 1cm≤L1≤2cm.

[0013] Optionally, the distance between the first mounting hole and the first contoured groove along the first direction is L2, and satisfies 3cm≤L2≤4cm.

[0014] Optionally, the distance between the second mounting hole and the second contour groove along the first direction is L3, which satisfies 3cm≤L3≤4cm, and L3=L2.

[0015] Optionally, the distance between the first mounting hole and the second mounting hole along the second direction is L4, and satisfies 5cm≤L4≤6cm.

[0016] Optionally, the pressure ring is a flared shape with a diameter that gradually decreases as it approaches the support platform.

[0017] Optionally, the support platform is further provided with an observation hole that communicates with the first contour groove, and the observation hole is located on the side of the first contour groove near the overlapping area.

[0018] Optionally, the ultrasonic welding fixture further includes a heat insulation plate connected between the mounting base plate and the support platform.

[0019] On the other hand, an ultrasonic welding machine is provided, the ultrasonic welding machine including a welding machine body, a welding machine base and an ultrasonic welding fixture as described in any of the above claims, the ultrasonic welding fixture being connected to the welding machine base, the welding machine body being vertically and vertically connected to the welding machine base and having a welding head for welding.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides an ultrasonic welding fixture, comprising a loading assembly consisting of a mounting base plate and a support platform, a heating assembly with a heating element, and a pressurizing assembly consisting of a pressure plate, a pressure ring, and a lifting drive. During ultrasonic welding, the heating element heats the plastic workpieces in the first and second contouring grooves, and the lifting drive drives the pressure plate to press the pressure ring against the overlapping area between the two plastic workpieces, thus aiding ultrasonic welding. Heating the plastic workpieces in the first and second contouring grooves increases molecular activity, and the lifting drive drives the pressure plate to press the pressure ring against the overlapping area between the two plastic workpieces, increasing the degree of fusion and thus enhancing welding strength and improving welding results. This eliminates the need for separate energy-conducting ribs to assist ultrasonic welding, avoiding structural weight gain and overcoming the problems of weak welding strength and poor welding results without separate energy-conducting ribs.

[0022] This utility model also provides an ultrasonic welding machine, which accelerates the welding speed, shortens the welding cycle, and improves the welding quality by using the ultrasonic welding fixture described above to assist in the welding operation. Attached Figure Description

[0023] Figure 1 This is a structural assembly drawing of the ultrasonic welding fixture provided by this utility model;

[0024] Figure 2 This is a structural cross-sectional view of the ultrasonic welding fixture provided by this utility model;

[0025] Figure 3 This is a cross-sectional view of the support platform in the ultrasonic welding fixture provided by this utility model;

[0026] Figure 4 This is an assembly drawing of an ultrasonic welding machine using the ultrasonic welding fixture described above, provided by this utility model.

[0027] In the picture:

[0028] 100. Plastic workpiece; 200. Welding machine body; 201. Welding head; 300. Welding machine base;

[0029] 1. Loading components; 11. Mounting base plate; 12. Support platform; 121. First contour groove; 122. Second contour groove; 123. First mounting hole; 124. Second mounting hole; 125. Third mounting hole; 126. Observation hole;

[0030] 2. Heating assembly; 21. Heating element; 22. Temperature sensing element;

[0031] 3. Pressurization assembly; 31. Pressure plate; 311. Working through hole; 32. Pressure ring; 321. Center through hole; 33. Lifting drive component;

[0032] 4. Heat insulation board. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Currently, in industries such as medical devices, hygiene products, automobiles, and lighting, ultrasonic welding of plastics / composite materials commonly employs design methods such as sharp corners, protrusions, pits, and self-locking rings. These methods create a structure on the workpiece to be welded that allows ultrasonic waves to converge, thereby ensuring the structural strength and welding effect after ultrasonic welding.

[0038] However, in the civil aviation field, since the design structure of the parts cannot be changed, it is impossible to process the structure for converging ultrasonic waves on the workpiece to be welded. Therefore, additional separate energy-conducting ribs are usually used to converge the ultrasonic vibration energy to achieve welding.

[0039] However, adding separate energy-conducting ribs not only increases the structural weight, but also causes material incompatibility issues because the materials of the energy-conducting ribs and the materials of the parts to be welded may differ. If separate energy-conducting ribs are not used, the welding strength and welding effect will be weak.

[0040] Therefore, in order to eliminate the separate energy-conducting ribs, avoid structural weight increase, and solve the problems of weak welding strength and poor welding effect without separate energy-conducting ribs, this embodiment provides an ultrasonic welding fixture. For ease of description, the height direction of the ultrasonic welding fixture is defined as the first direction, and the length direction of the ultrasonic welding fixture is defined as the second direction.

[0041] like Figures 1 to 4As shown, the ultrasonic welding fixture includes a loading assembly 1, a heating assembly 2, and a pressurizing assembly 3. The loading assembly 1 includes a mounting base plate 11 and a support platform 12. The mounting base plate 11 is connected to the ultrasonic welding machine, and the support platform 12 is connected to the mounting base plate 11. The support platform 12 has a first contouring groove 121 and a second contouring groove 122. Two plastic workpieces 100 to be welded are placed in the first contouring groove 121 and the second contouring groove 122, respectively. The depth of the first contouring groove 121 is greater than the depth of the second contouring groove 122, so that an overlapping area for welding is formed between the two plastic workpieces 100. The heating assembly 2 includes a heating element 21, which is inserted into the support platform 1. The pressure assembly 3 includes a pressure plate 31, a pressure ring 32, and a lifting drive 33. The pressure plate 31 is vertically mounted on the mounting base plate 11 along the first direction and has a working through hole 311 corresponding to the welding head 201 of the ultrasonic welding machine. The pressure ring 32 is connected to the side of the pressure plate 31 facing the support platform 12 and has a central through hole 321 communicating with the working through hole 311. The pressure ring 32 is used to press the overlapping area. The lifting drive 33 is connected to the mounting base plate 11 and is located on both sides of the support platform 12 along the second direction. The lifting drive 33 is used to drive the pressure plate 31 to rise and fall.

[0042] The ultrasonic welding fixture includes a loading assembly 1 consisting of a mounting base plate 11 and a support platform 12, a heating assembly 2 with a heating element 21, and a pressurizing assembly 3 consisting of a pressure plate 31, a pressure ring 32, and a lifting drive 33. During ultrasonic welding, the heating element 21 heats the plastic workpieces 100 within the first and second contour grooves 121, and the lifting drive 33 drives the pressure plate 31 to press the pressure ring 32 against the overlapping area between the two plastic workpieces 100, thus aiding ultrasonic welding. Heating the plastic workpieces 100 within the first and second contour grooves 121 with the heating element 21 increases molecular activity, and the lifting drive 33 drives the pressure plate 31 to press the pressure ring 32 against the overlapping area between the two plastic workpieces 100, increasing the degree of fusion and thus enhancing welding strength and improving welding results. This eliminates the need for separate energy-conducting ribs to assist ultrasonic welding, avoiding structural weight gain and overcoming the problems of weak welding strength and poor welding results associated with the absence of separate energy-conducting ribs.

[0043] During ultrasonic welding, the shapes of the two plastic workpieces 100 to be welded may be the same or different. The first contour groove 121 milled on the support table 12 is consistent with the shape of the plastic workpiece 100 to be placed in the first contour groove 121, and the second contour groove 122 milled is consistent with the shape of the plastic workpiece 100 to be placed in the second contour groove 122. The first contour groove 121 is consistent with the length, width and thickness of the plastic workpiece 100 inside it, while the second contour groove 122 is consistent with the length and width of the plastic workpiece 100 inside it. However, the depth of the second contour groove 122 is 0.5 mm to 1 mm less than the thickness of the plastic workpiece 100 inside it, so as to facilitate the removal of the welded plastic workpiece 100.

[0044] In this embodiment, the heating element 21 is an electric heating rod with a large internal resistance. By energizing it, the temperature is increased, thereby achieving the heating function. In order to facilitate heat conduction, the support platform 12 is made of aluminum material.

[0045] In this embodiment, the lifting drive 33 used to control the lifting of the pressure plate 31 is a cylinder. The pressurization assembly 3 also includes a manual valve, a pressure regulating valve, and an air pump. The piston rod of the cylinder is fixed to the pressure plate 31 by a threaded connection. The cylinder is connected to the manual valve through an air pipe, then to the pressure regulating valve, and finally to the air pump. The pressure ring 32 is connected and fixed to the pressure plate 31 by a threaded connection, which makes it easy to replace pressure rings 32 of different specifications according to different technical requirements.

[0046] Optionally, such as Figure 2 , Figure 3 As shown, the support platform 12 is also provided with a first mounting hole 123, a second mounting hole 124 and a third mounting hole 125. A heating element 21 is inserted into both the first mounting hole 123 and the second mounting hole 124. The first mounting hole 123 is located below the first contour groove 121, the second mounting hole 124 is located below the second contour groove 122, and the third mounting hole 125 is located below the overlapping area. The heating assembly 2 also includes a temperature detection element 22 and a temperature controller. The temperature detection element 22 is located in the third mounting hole 125 and is used to transmit the detected temperature data to the temperature controller. The temperature controller is used to control the power supply of the heating element 21 according to the temperature data.

[0047] By setting a temperature detection element 22, the temperature of the overlapping area is detected, ensuring that the overlapping area is within the optimal temperature range during welding operations, thereby improving the welding effect. Furthermore, by setting a temperature controller to control the power supply to the heating element 21, the heating element 21 is powered off and stops heating when the temperature reaches the set value, and is powered on to continue heating when the temperature is lower than the set temperature.

[0048] In this embodiment, the temperature sensing element 22 is a thermocouple. Thermocouples are commonly used temperature-sensing elements in temperature measuring instruments. They directly measure temperature and convert the temperature signal into a thermoelectric potential signal, which is then converted into the temperature of the measured medium by an electrical instrument. The temperature controller can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the heating element 21 to switch on and off by receiving the thermoelectric potential signal from the thermocouple. In this embodiment, to facilitate the connection between the thermocouple and the support platform 12, the third mounting hole 125 has an internal thread, and the thermocouple has an external thread. The thermocouple is fixedly connected to the third mounting hole 125 by a threaded connection.

[0049] Optionally, such as Figure 3 As shown, the distance between the third mounting hole 125 and the first contoured groove 121 along the first direction is L1, and satisfies 1cm≤L1≤2cm. By limiting the distance L1 between the third mounting hole 125 and the first contoured groove 121 along the first direction to satisfy 1cm≤L1≤2cm, the temperature sensing element 22 inserted in the third mounting hole 125 maintains a suitable distance from the overlapping area, ensuring the accuracy of the temperature sensing element 22's measurement data.

[0050] Optionally, such as Figure 3 As shown, the distance L2 between the first mounting hole 123 and the first contour groove 121 along the first direction satisfies 3cm≤L2≤4cm. By limiting the distance L2 between the first mounting hole 123 and the first contour groove 121 along the first direction to satisfy 3cm≤L2≤4cm, it is ensured that the heating element 21 inserted into the first mounting hole 123 maintains a suitable distance from the first contour groove 121, avoiding burning the plastic workpiece 100 if it is too close, and avoiding excessive distance, which would result in excessively long heating time.

[0051] Optionally, such as Figure 3 As shown, the distance between the second mounting hole 124 and the second contouring groove 122 along the first direction is L3, which satisfies 3cm≤L3≤4cm and L3=L2. By limiting the distance L3 between the second mounting hole 124 and the second contouring groove 122 along the first direction to satisfy 3cm≤L3≤4cm, it is ensured that the heating element 21 inserted into the second mounting hole 124 and the second contouring groove 122 maintain a suitable distance, avoiding burning the plastic workpiece 100 if too close, and avoiding excessive distance, which would result in excessively long heating time. Furthermore, by ensuring that L3=L2, it is ensured that the heating rates in the first contouring groove 121 and the second contouring groove 122 are basically the same.

[0052] Optionally, such as Figure 3As shown, the distance between the first mounting hole 123 and the second mounting hole 124 along the second direction is L4, and satisfies 5cm≤L4≤6cm. By limiting the distance L4 between the first mounting hole 123 and the second mounting hole 124 along the second direction to satisfy 5cm≤L4≤6cm, it avoids the two heating elements 21 from being too close, causing mutual interference, and also avoids the two heating elements 21 from being too far apart, resulting in an excessively large overlapping area, which would affect the welding effect.

[0053] Optionally, such as Figure 2 As shown, the pressure ring 32 is a horn shape with a diameter that gradually decreases as it approaches the support platform 12. When the welding head 201 is inserted into the pressure ring 32 for welding, the horn-shaped pressure ring 32, with its diameter gradually decreasing as it approaches the support platform 12, effectively focuses the ultrasonic waves, improving the welding effect, accelerating the welding speed, and shortening the welding cycle.

[0054] Optionally, such as Figure 3 As shown, the support platform 12 is also provided with an observation hole 126 that communicates with the first contour groove 121. The observation hole 126 is located on the side of the first contour groove 121 near the overlapping area. By providing an observation hole 126 on the support platform 12, it is convenient to observe the welding situation through the observation hole 126, so as to control the welding progress at any time.

[0055] Optionally, such as Figure 1 As shown, the ultrasonic welding fixture also includes a heat insulation plate 4, which is connected between the mounting base plate 11 and the support platform 12. Since the support platform 12 is equipped with a heating element 21 for heating, the temperature of the support platform 12 is relatively high. Therefore, by setting the heat insulation plate 4, heat is prevented from being transferred to the mounting base plate 11, which would cause the mounting base plate 11 to deform due to heat.

[0056] In this embodiment, the mounting base plate 11 is connected to the ultrasonic welding machine by bolts, the heat insulation plate 4 is connected to the mounting base plate 11 by bolts, and the support platform 12 is connected to the heat insulation plate 4 by bolts, thereby achieving a detachable connection between the three, making it easy to replace the support platform 12 of different specifications and models at any time to adapt to plastic workpieces 100 of different shapes. Furthermore, the heat insulation plate 4 is mainly made of high-temperature resistant and low thermal conductivity materials, such as ceramic fiber, rock wool, and aerogel. These materials are used in industrial production to isolate high-temperature environments and protect equipment and personnel safety.

[0057] In this embodiment, as Figure 4As shown, an ultrasonic welding machine is also provided. The ultrasonic welding machine includes a welding machine body 200, a welding machine base 300, and the aforementioned ultrasonic welding fixture. The ultrasonic welding fixture is connected to the welding machine base 300, and the welding machine body 200 is provided with a welding head 201 for welding. This ultrasonic welding machine, by using the aforementioned ultrasonic welding fixture to assist in welding operations, accelerates the welding speed, shortens the welding cycle, and improves the welding quality.

[0058] When performing ultrasonic welding operations using the aforementioned ultrasonic welding machine and ultrasonic welding fixture, the following steps are included:

[0059] S1: Adjust the temperature controller and set a desired temperature. The temperature range is generally 50℃-160℃. The heating element 21 is powered on to heat the first contour groove 121 and the second contour groove 122. After heating to the set temperature, the temperature controller enters the temperature maintenance stage.

[0060] S2: Place the plastic workpiece 100 to be welded into the first contour groove 121 and the second contour groove 122 respectively, wait for 2 to 3 minutes to allow the temperature of the overlapping area to reach the set temperature, adjust the pressure regulating valve to a required pressure, open the manual valve, and cause the cylinder piston, which is the lifting drive component 33, to drive the pressure plate 31 to move downward, and press the pressure ring 32 below the pressure plate 31 against the overlapping area.

[0061] S3: Adjust the welding parameters of the ultrasonic welding machine and start welding. The welding head 201 passes through the working through hole 311 of the pressure plate 31 and the central through hole 321 of the pressure ring 32, and contacts the plastic workpiece 100 to be welded for welding.

[0062] S4: As required by technology, the manual valve can be adjusted during or after welding to make the cylinder piston drive the pressure plate 31 to move upward and lift the pressure ring 32.

[0063] S5: Welding completed. Welding head 201 is lifted, and the welded plastic workpiece 100 is removed.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An ultrasonic welding fixture, characterized in that, The ultrasonic welding fixture is used for welding plastic workpieces (100), and includes: The loading assembly (1) includes a mounting base plate (11) and a support platform (12). The mounting base plate (11) is connected to an ultrasonic welding machine, and the support platform (12) is connected to the mounting base plate (11). The support platform (12) has a first contour groove (121) and a second contour groove (122). Two plastic workpieces (100) to be welded are placed in the first contour groove (121) and the second contour groove (122) respectively. The depth of the first contour groove (121) is greater than the depth of the second contour groove (122) so that an overlapping area for welding is formed between the two plastic workpieces (100). Heating assembly (2), the heating assembly (2) includes a heating element (21), the heating element (21) is inserted into the support platform (12) and is used to heat the plastic workpiece (100) in the first contour groove (121) and the second contour groove (122); The pressure assembly (3) includes a pressure plate (31), a pressure ring (32), and a lifting drive (33). The pressure plate (31) is vertically mounted on the mounting base plate (11) along a first direction and has a working through hole (311) corresponding to the welding head (201) of the ultrasonic welding machine. The pressure ring (32) is connected to the side of the pressure plate (31) facing the support platform (12) and has a central through hole (321) communicating with the working through hole (311). The pressure ring (32) is used to press the overlapping area. The lifting drive (33) is connected to the mounting base plate (11) and located on both sides of the support platform (12) along a second direction. The lifting drive (33) is used to drive the pressure plate (31) to move up and down.

2. The ultrasonic welding fixture according to claim 1, characterized in that, The support platform (12) is also provided with a first mounting hole (123), a second mounting hole (124) and a third mounting hole (125). The heating element (21) is inserted into the first mounting hole (123) and the second mounting hole (124). The first mounting hole (123) is located below the first contour groove (121), the second mounting hole (124) is located below the second contour groove (122), and the third mounting hole (125) is located below the overlapping area. The heating assembly (2) also includes a temperature detection element (22) and a temperature controller. The temperature detection element (22) is located in the third mounting hole (125) and is used to transmit the detected temperature data to the temperature controller. The temperature controller is used to control the power supply of the heating element (21) according to the temperature data.

3. The ultrasonic welding fixture according to claim 2, characterized in that, The distance between the third mounting hole (125) and the first contour groove (121) along the first direction is L1, and satisfies 1cm≤L1≤2cm.

4. The ultrasonic welding fixture according to claim 2, characterized in that, The distance between the first mounting hole (123) and the first contour groove (121) along the first direction is L2, and satisfies 3cm≤L2≤4cm.

5. The ultrasonic welding fixture according to claim 4, characterized in that, The distance between the second mounting hole (124) and the second contour groove (122) along the first direction is L3, which satisfies 3cm≤L3≤4cm and L3=L2.

6. The ultrasonic welding fixture according to claim 2, characterized in that, The distance between the first mounting hole (123) and the second mounting hole (124) along the second direction is L4, and satisfies 5cm≤L4≤6cm.

7. The ultrasonic welding fixture according to claim 1, characterized in that, The pressure ring (32) is a trumpet shape with a diameter that gradually decreases as it approaches the support platform (12).

8. The ultrasonic welding fixture according to claim 1, characterized in that, The support platform (12) is also provided with an observation hole (126) that communicates with the first contour groove (121). The observation hole (126) is located on the side of the first contour groove (121) near the overlapping area.

9. The ultrasonic welding fixture according to claim 1, characterized in that, The ultrasonic welding fixture also includes a heat insulation plate (4), which is connected between the mounting base plate (11) and the support platform (12).

10. An ultrasonic welding machine, characterized in that, The ultrasonic welding machine includes a welding machine body (200), a welding machine base (300), and an ultrasonic welding fixture as described in any one of claims 1-9. The ultrasonic welding fixture is connected to the welding machine base (300), and the welding machine body (200) is vertically connected to the welding machine base (300) and is provided with the welding head (201) for welding.

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