Ultrasonic welding machine for plug shell

Abstract

The utility model relates to the technical field of ultrasonic welding, in particular to a plug shell ultrasonic welding machine which comprises a machine body, a lifting power mechanism is installed on the machine body, a downward lifting head is in power connection with the lifting power mechanism, and an ultrasonic welding head is installed at the lower end of the lifting head. The machine body is further provided with a product positioning jig corresponding to the position under the ultrasonic welding head, the two sides of the lifting head are each provided with a fixing frame, one fixing frame is rotationally connected with a driving roller, and the fixing frame is further provided with a motor for driving the driving roller to rotate, so that automatic conveying and replacing of the protective film are achieved; an operator does not need to manually place the protective film, so that the time for placing the protective film is greatly saved, and the welding efficiency is improved; and the condition that the product is abraded by the ultrasonic welding head due to the fact that an operator does not replace the protective film which is used too many times in time is avoided through the mode of automatically conveying the protective film, and the product quality is effectively guaranteed.

Description

Technical Field

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

[0002] In the manufacturing process of power plugs for electronic products, the plug housing consists of two overlapping shell structures. After the circuit board and pins are fixed to the plug housing, the two shells are welded together using an ultrasonic welding process. Existing semi-automatic ultrasonic welding machines include a platform for placing the product, a fixture on the platform for positioning the product, a lifting mechanism mounted on the platform, and an ultrasonic welding head connected to the lifting mechanism. The product is positioned on the fixture, and then the lifting mechanism is activated. The welding head presses down, pressing the product down to perform ultrasonic welding. During the welding process, the surface of the product is damaged by the pressure applied to hold the ultrasonic welding head in place. An ultrasonic protective film is typically placed between the product and the ultrasonic welding head. However, users have found that placing the ultrasonic protective film takes time, and it needs to be replaced after a certain number of uses. Operators not only need to spend time placing the film but also anticipate when it will need replacement, increasing the time required for ultrasonic welding. Furthermore, if operators continue to use the film unknowingly, it can cause wear and tear on the product from the ultrasonic welding head. Therefore, it is necessary to propose an improved technical solution to address these problems. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] An ultrasonic welding machine for plug housings includes a machine body with a lifting power mechanism installed on the machine body. A downward-facing lifting head is poweredly connected to the lifting power mechanism. An ultrasonic welding head is installed at the lower end of the lifting head. The machine body also has a product positioning fixture corresponding to the area directly below the ultrasonic welding head. Fixed frames are installed on both sides of the lifting head. An active roller is rotatably connected to one of the fixed frames, and a motor that drives the active roller is also installed on the fixed frame. A driven roller is rotatably connected to the other fixed frame, and guide rollers are rotatably connected to both fixed frames. A roll is installed on both the active and driven rollers. A protective film roll is installed on the roll of the driven roller. The protective film roll is wound along the guide roller, passes through the lower end of the ultrasonic welding head, and is finally wound onto the roll of the active roller.

[0005] Preferably, a programmable logic controller (PLC) is installed inside the machine body. The lifting power mechanism and the ultrasonic welding head are both electrically connected to the PLC. A protective film control box is also installed on the machine body. The protective film control box integrates a frequency converter and an adapter plate. The frequency converter is electrically connected to the motor. A counting sensor is also installed on the lifting power mechanism. The counting sensor is used to identify the number of times the fixed frame is lifted and lowered. The frequency converter and the counting sensor are electrically connected to the PLC through the adapter plate.

[0006] Preferably, threaded fixing holes are provided on both sides of the lifting head, and the fixing frame and the lifting head are fixedly connected by screws through the threaded fixing holes.

[0007] Preferably, the fixed frame includes a thickened plate fixedly installed on the side of the lifting head, a transition plate fixedly installed on the thickened plate and extending rearward, a fixed plate fixedly connected to the rear end of the transition plate and extending in the direction towards the lifting power mechanism, and an extension plate fixedly installed on the fixed plate. The driving roller and the driven roller are normally movably connected in front of the fixed plate, the motor is installed behind the fixed plate, and the guide roller is normally connected in front of the extension plate.

[0008] Preferably, the distance between the driving roller and the driven roller is smaller than the distance between the two guide rollers.

[0009] Preferably, at least two positioning rings are installed on the guide roller, and the front and rear positions of the protective film roll are restricted by the two positioning rings when it is wound on the guide roller.

[0010] Preferably, a push-button switch control box is also installed on the machine body. The push-button switch control box is electrically connected to the programmable logic controller. The push-button switch control box is provided with a start button and a work button.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The system enables automatic delivery and replacement of the protective film, eliminating the need for manual placement and significantly reducing time spent on this task, thus improving welding efficiency. Furthermore, the automatic delivery system prevents wear and tear on the ultrasonic welding head caused by operators failing to replace worn-out protective films in a timely manner, effectively ensuring product quality. In addition, this automation reduces the need for operators to anticipate and replace the protective film, lowering labor intensity and preventing product quality issues caused by human error. Therefore, integrating a continuous automatic protective film supply system into the plug housing ultrasonic welding machine makes the welding process smoother, reduces downtime due to protective film replacement, further improves production efficiency, and lowers production costs.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a front structural diagram of the present invention;

[0017] Figure 3 This is a structural schematic diagram of the lifting head and the protective film supply system integrated on the lifting head in this utility model;

[0018] Figure 4 This is a utility model Figure 3 A schematic diagram of the cross-sectional structure;

[0019] Figure 5 This is a circuit module connection block diagram of this utility model.

[0020] The reference numerals and names in the figure are as follows:

[0021] 10. Body, 11. Product positioning fixture, 12. Programmable logic controller, 13. Push-button switch control box, 20. Lifting power mechanism, 21. Lifting head, 211. Threaded fixing hole, 22. Ultrasonic welding head, 30. Fixing frame, 301. Thickened plate, 302. Transition plate, 303. Fixing plate, 304. Extension plate, 31. Driven roller, 32. Driven roller, 33. Guide roller, 331. Positioning ring, 34. Roll, 35. Protective film roll, 36. Motor, 40. Protective film control box, 41. Variable frequency speed controller, 42. Adapter plate, 43. Counting sensor. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please see Figure 1-5In this embodiment of the present invention, an ultrasonic welding machine for plug housings includes a machine body 10. A lifting power mechanism 20 is installed on the machine body 10. A downward-facing lifting head 21 is poweredly connected to the lifting power mechanism 20. An ultrasonic welding head 22 is installed at the lower end of the lifting head 21. The machine body 10 is also provided with a product positioning fixture 11 corresponding to the area directly below the ultrasonic welding head 22. Fixing frames 30 are respectively installed on both sides of the lifting head 21. An active roller 31 is rotatably connected to one of the fixing frames 30. Furthermore, a motor 36 that drives the active roller 31 to rotate is installed on the fixed frame 30. A driven roller 32 is rotatably connected to another fixed frame 30. Guide rollers 33 are also rotatably connected to both fixed frames 30. Rollers 34 are installed on both the active roller 31 and the driven roller 32. A protective film roll 35 is provided on the roll 34 of the driven roller 32. The protective film roll 35 is wound along the guide roller 33, passes through the lower end of the ultrasonic welding head 22, and is finally wound onto the roll 34 of the active roller 31.

[0024] In the above technical solution, when the ultrasonic welding machine for plug housings is working, the plug housing product to be welded is first placed on the machine body 10 in the product positioning fixture 11 corresponding to the area directly below the ultrasonic welding head 22 for positioning; the motor 36 is started, driving the active roller 31 to rotate, and the protective film roll 35 on the driven roller 32 drum 34 is unrolled accordingly. The protective film roll 35 passes through the lower end of the ultrasonic welding head 22 along the path wound by the guide roller 33, and finally winds onto the drum 34 of the active roller 31, forming a continuous protective film channel; then, the lifting power mechanism 20 drives the lifting head 21 to drive the ultrasonic welding head 22. The ultrasonic welding head 22 descends, at which point it contacts the plug housing through the protective film. During the descent, the protective film acts as a buffer, preventing the welding head from directly damaging the product surface. Once the ultrasonic welding head 22 is pressed down to the appropriate position, ultrasonic welding of the plug housing begins. After welding is completed, the lifting power mechanism 20 drives the lifting head 21 and the ultrasonic welding head 22 to move upward and reset. With the motor 36 continuously rotating, the active roller 31 continues to rotate, conveying the used protective film forward. A new protective film is then placed below the ultrasonic welding head 22 to prepare for the next welding operation.

[0025] This setup, compared to existing semi-automatic ultrasonic welding machines, enables automatic delivery and replacement of the protective film. Operators no longer need to manually place the protective film, significantly saving time and improving welding efficiency. Furthermore, the automatic delivery of the protective film prevents wear and tear on the product caused by the ultrasonic welding head 22 due to operators failing to replace worn-out protective films in a timely manner, effectively ensuring product quality. In addition, this automation reduces the need for operators to predict and replace the protective film, lowering labor intensity and preventing product quality issues caused by human error. Therefore, by integrating a continuous automatic protective film supply system into the plug housing ultrasonic welding machine, the welding process becomes smoother, reducing downtime caused by protective film replacement, further improving production efficiency and reducing production costs.

[0026] Please see Figure 1 , Figure 2 and Figure 5Based on the above technical solutions, regarding intelligent control, it is further proposed that a programmable logic controller (PLC) 12 be installed inside the machine body 10. The lifting power mechanism 20 and the ultrasonic welding head 22 are both electrically connected to the PLC 12. A protective film control box 40 is also installed on the machine body 10. The protective film control box 40 integrates a frequency converter 41 and an adapter plate 42. The frequency converter 41 is electrically connected to the motor 36. A counting sensor 43 is also installed on the lifting power mechanism 20. The counting sensor 43 is used to identify the number of times the fixed frame 30 is lifted. The frequency converter 41 and the counting sensor 43 are electrically connected to the PLC 12 through the adapter plate 42. The programmable logic controller 12 is the logic controller of the ultrasonic welding machine for plug housings. With sufficient external terminals, it connects to the protective film control box 40 and the counting sensor 43 via the adapter board 42 to achieve intelligent control of the protective film supply system. The counting sensor 43 monitors the number of times the fixed frame 30 is raised and lowered in real time. Combined with the programmable logic controller 12, it can accurately control the conveying length and replacement timing of the protective film, avoiding the impact of excessive or insufficient use of the protective film on the welding quality. The frequency converter 41 can flexibly adjust the speed of the motor 36 according to actual production needs through the programmable logic controller 12, thereby controlling the conveying speed of the protective film and adapting to the welding rhythm of different product specifications. In addition, a push-button switch control box 13 is installed on the machine body 10. The push-button switch control box 13 is electrically connected to the programmable logic controller 12. The push-button switch control box 13 is equipped with a start button and a work button. The start button is used to start or stop the ultrasonic welding machine for the plug housing. When the ultrasonic welding machine is running, the product is positioned on the product positioning fixture 11, and then the work button is pressed. The lifting power mechanism 20 runs, driving the ultrasonic welding head 22 to press the product and perform ultrasonic welding. After welding, the product is reset. When the ultrasonic welding machine is stopped, pressing the work button will not run the equipment. The push-button switch control box 13 simplifies the operation process, clearly distinguishes between start and work commands, prevents misoperation, and improves the safety and reliability of the equipment. Through the synergistic effect of these technologies, not only is production efficiency and product quality stability further improved, but the degree of manual intervention is also reduced, which facilitates standardized and large-scale production. At the same time, it provides a basis for the collection and analysis of production data, which is helpful for subsequent equipment maintenance and production process optimization.

[0027] Please see Figure 1-4Based on the above technical solution, it is further proposed that threaded fixing holes 211 be provided on both sides of the lifting head 21, and the fixing frame 30 and the lifting head 21 are fixedly connected by screws through the threaded fixing holes 211. The connection method of threaded fixing holes 211 and screws makes the fixing frame 30 and the lifting head 21 firmly connected, thereby integrating the protective film supply system on the lifting head 21 and enabling it to operate synchronously with the lifting action of the lifting head 21, ensuring the reliability of the protective film conveying structure during operation, and also facilitating disassembly and maintenance, reducing the difficulty of equipment maintenance.

[0028] The fixed frame 30 includes a thickened plate 301 fixedly installed on the side of the lifting head 21, a transition plate 302 fixedly installed on the thickened plate 301 and extending rearward, a fixed plate 303 fixedly connected to the rear end of the transition plate 302 and extending directionally toward the lifting power mechanism 20, and an extension plate 304 fixedly installed on the fixed plate 303. The driving roller 31 and the driven roller 32 are movably connected directionally in front of the fixed plate 303. The motor 36 is installed behind the fixed plate 303. The guide roller 33 is directionally... Connected to the extension plate 304; the thickened plate 301 is used to separate the other components of the fixing frame 30 from the lifting power mechanism 20, and the transition plate 302 serves as a transition. After cooperating with the fixing plate 303, the installation positions of the active roller 31, the driven roller 32, the motor 36 and the guide roller 33 are reasonably planned, so that the roll 34 can be set on both sides of the lifting head 21, so that when winding the protective film roll 35, the protective film roll 35 can automatically pass under the ultrasonic welding head 22.

[0029] The distance between the driving roller 31 and the driven roller 32 is smaller than the distance between the two guide rollers 33, ensuring that the protective film roll 35 maintains a stable tension during transport, reducing deviation and wrinkling. At least two positioning rings 331 are installed on the guide rollers 33. When the protective film roll 35 is wound around the guide rollers 33, the two positioning rings 331 limit its front-to-back position, further ensuring the accuracy of the protective film transport path, preventing welding quality from being affected by protective film misalignment, and ensuring that the ultrasonic welding head 22 maintains a good buffering protection effect with the product, thereby improving the stability of the welding operation and the product yield.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An ultrasonic welding machine for plug housings, comprising a machine body (10), a lifting power mechanism (20) mounted on the machine body (10), a downward-facing lifting head (21) poweredly connected to the lifting power mechanism (20), an ultrasonic welding head (22) mounted at the lower end of the lifting head (21), and a product positioning fixture (11) corresponding to the area directly below the ultrasonic welding head (22) on the machine body (10), characterized in that, Fixed frames (30) are installed on both sides of the lifting head (21). An active roller (31) is rotatably connected to one of the fixed frames (30), and a motor (36) that drives the active roller (31) to rotate is also installed on the fixed frame (30). A driven roller (32) is rotatably connected to the other fixed frame (30), and a guide roller (33) is rotatably connected to both fixed frames (30). A drum (34) is installed on both the active roller (31) and the driven roller (32). A protective film roll (35) is provided on the drum (34) of the driven roller (32). The protective film roll (35) is wound along the guide roller (33) and passes through the lower end of the ultrasonic welding head (22), and finally wound onto the drum (34) of the active roller (31).

2. The ultrasonic welding machine for plug housings according to claim 1, characterized in that, A programmable logic controller (12) is installed inside the body (10). The lifting power mechanism (20) and the ultrasonic welding head (22) are electrically connected to the programmable logic controller (12). A protective film control box (40) is also installed on the body (10). The protective film control box (40) integrates a frequency converter (41) and an adapter plate (42). The frequency converter (41) is electrically connected to the motor (36). A counting sensor (43) is also installed on the lifting power mechanism (20). The counting sensor (43) is used to identify the number of times the fixed frame (30) is lifted. The frequency converter (41) and the counting sensor (43) are electrically connected to the programmable logic controller (12) through the adapter plate (42).

3. The ultrasonic welding machine for plug housings according to claim 1, characterized in that, Threaded fixing holes (211) are provided on both sides of the lifting head (21), and the fixing bracket (30) and the lifting head (21) are fixedly connected by screws through the threaded fixing holes (211).

4. The ultrasonic welding machine for plug housings according to claim 1, characterized in that, The fixed frame (30) includes a thickened plate (301) fixedly installed on the side of the lifting head (21), a transition plate (302) fixedly installed on the thickened plate (301) and extending rearward, a fixed plate (303) fixedly connected to the rear end of the transition plate (302) and extending in the direction towards the lifting power mechanism (20), and an extension plate (304) fixedly installed on the fixed plate (303). The driving roller (31) and the driven roller (32) are normally movably connected in front of the fixed plate (303), the motor (36) is installed behind the fixed plate (303), and the guide roller (33) is normally connected in front of the extension plate (304).

5. The ultrasonic welding machine for plug housings according to claim 4, characterized in that, The distance between the driving roller (31) and the driven roller (32) is smaller than the distance between the two guide rollers (33).

6. The ultrasonic welding machine for a plug housing according to claim 4, characterized in that, At least two positioning rings (331) are installed on the guide roller (33). When the protective film roll (35) is wound on the guide roller (33), the front and rear positions are restricted by the two positioning rings (331).

7. An ultrasonic welding machine for plug housings according to claim 2, characterized in that, A push-button switch control box (13) is also installed on the body (10). The push-button switch control box (13) is electrically connected to the programmable logic controller (12). The push-button switch control box (13) is equipped with a start button and a work button.

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