An ultrasonic welding fixture

Abstract

This utility model discloses an ultrasonic welding fixture, which includes a base, a drive mechanism, a support platform, a positioning component, and an auxiliary housing. The support platform is connected to the drive mechanism via a guide rail and contains a turntable, an arc-shaped limiting block, and an inclined limiting block, forming a dynamic positioning system that enables precise positioning of workpieces with complex shapes. The turntable is driven to rotate slowly by the reciprocating motion of the support platform, and a ratchet structure ensures controllability and reduces the frequency of adjustments. The auxiliary housing is equipped with a cleaning device and an elastic sealing layer to ensure a dust-free environment and improve positioning accuracy. The detection housing is combined with an electromagnetic clutch to enhance operational intelligence. The discharge port design enhances convenience. This application can effectively meet the positioning needs of complex workpieces, reduce the adjustment frequency, and improve production efficiency and welding quality.

Description

Technical Field

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

[0002] In the processing of plastic products, ultrasonic welding technology is often used to join different components together. This process is particularly important for workpieces with complex shapes, as it requires not only ensuring weld strength but also precise welding positioning to guarantee the overall performance and appearance quality of the product.

[0003] Because welding complex-shaped workpieces requires high positioning accuracy, fixture design becomes a critical step. Existing ultrasonic welding fixtures mostly achieve positioning through simple clamping structures. However, due to the diverse shapes and potential surface irregularities of workpieces, these fixtures are prone to positioning inaccuracies in practical use. This leads to decreased welding quality and may affect the smooth progress of subsequent assembly processes. Therefore, frequent fixture adjustments are needed to adapt to different workpieces, which reduces production efficiency to some extent. Utility Model Content

[0004] The purpose of this utility model is to provide an ultrasonic welding fixture that solves the problems mentioned in the background art.

[0005] This utility model is implemented as follows: an ultrasonic welding fixture includes a base, a driving mechanism on one side of the top of the base, and a support platform with an open top. A support plate is fixedly mounted on the other side of the top of the base. Guide rails are fixedly spaced between the driving mechanism and the support plate. The support platform is located between the guide rails. The output end of the driving mechanism is a crank-connecting rod structure connected to the support platform. The driving mechanism is used to drive the support platform to reciprocate on the guide rails via the crank-connecting rod structure. An inclined guide plate is fixedly connected to the base, located at the bottom of the support platform. A positioning assembly is also included. The positioning assembly is located inside the support platform and includes a turntable rotatably mounted inside the support platform. The turntable has multiple evenly arranged positioning slots. The component also includes two arc-shaped limiting blocks and two inclined limiting blocks. The two arc-shaped limiting blocks are spaced apart along the axial direction of the turntable and fixedly connected to the inner walls of both sides of the support platform. The two inclined limiting blocks are spaced apart along the radial direction of the turntable and fixedly connected to the inner walls of both sides of the support platform. The height of the arc-shaped limiting blocks and the inclined limiting blocks is greater than the height of the turntable axis. The arc-shaped limiting blocks and the inclined limiting blocks cooperate with the surface of the turntable. The arc-shaped limiting blocks, the inclined limiting blocks, the top surface of the turntable, and the inner wall of the support platform form a positioning cavity. Both sides of the support platform are provided with main pulleys that cooperate with two guide rails. The main pulleys are provided with a pawl structure with directional rotation function. The main pulleys and the turntable are connected by a reducer fixedly installed on the outer surface of the support platform.

[0006] Preferably, an auxiliary housing is fixedly connected to the side of the support platform away from the drive mechanism, and auxiliary pulleys that cooperate with the guide rail are rotatably arranged on both sides of the auxiliary housing. The auxiliary housing, auxiliary pulleys, main pulleys and turntable are all in the same plane.

[0007] Preferably, a rectangular window is provided at the junction of the support platform and the auxiliary box. A vertically arranged guide column is fixedly connected inside the auxiliary box, and a horizontally arranged slide rod is slidably connected to the guide column. A strip block is fixedly connected to one end of the slide rod facing the rectangular window, and a cleaning device is provided on the strip block. A double-end bracket is connected to the other end of the slide rod, and pins are fixedly connected to both ends of the double-end bracket. Turntables connected to the auxiliary pulley are provided on both sides of the auxiliary box. Elliptical holes that cooperate with the pins are provided on the turntables. When the support platform moves back and forth, the cleaning device at one end of the slide rod moves back and forth through the cooperation of the turntable and the pins, so that it contacts the surface of the turntable.

[0008] Preferably, an elastic sealing layer is fixedly connected to the slide rod, and the elastic sealing layer is sealed to the inner wall of the auxiliary box. The elastic sealing layer is located between the guide column and the strip block. The elastic sealing layer isolates the internal space of the auxiliary box into a dust-free area. The double-end bracket and the turntable are both located in the dust-free area.

[0009] Preferably, airflow channels are provided inside the strip block and the slide bar. Multiple air holes are provided on one side of the cleaning device on the strip block. An exhaust pipe connected to the airflow channels is fixedly connected to the double-end bracket. An air inlet pipe is fixedly provided on the top of the auxiliary box. One-way valves are provided on both the exhaust pipe and the air inlet pipe. A dust cover is fixedly connected to the top of the air inlet pipe.

[0010] Preferably, a detection box is fixedly connected to the side of the support platform opposite to the rectangular window. An image acquisition device is installed inside the detection box. A transparent observation window is fixedly installed at the joint between the detection box and the support platform. Electromagnetic clutches for driving the auxiliary pulley and the turntable are fixedly connected to both sides of the auxiliary box.

[0011] Preferably, a discharge port door that can be closed or opened is provided on one side of the positioning cavity in the bearing platform.

[0012] The ultrasonic welding fixture provided in this embodiment of the invention has the following advantages: The driving method of this device is the same as that of conventional welding fixtures, both utilizing the rapid reciprocating motion of the support platform to achieve workpiece positioning. The key difference lies in the fact that, by utilizing the reciprocating motion of the support platform, combined with a conventional reducer and a pawl structure on the main pulley, a turntable within the support platform can rotate slowly. This slow rotation of the turntable not only allows for the switching of positioning slot areas but also, due to the turntable's structural characteristics, enables multiple positioning processes at different positions for the workpiece. Once the positioning slot areas on the turntable can be rotated and switched, even if positioning deviations occur, a new positioning slot area can be selected to handle the positioning work. This rotating positioning method not only reduces the frequency of turntable adjustments but also makes the adjustment work easier. In summary, this welding fixture, through the cooperation of simple mechanical structures, achieves positioning functionality while also featuring low adjustment frequency and simplified adjustment.

[0013] This invention utilizes a positioning groove in conjunction with an arc-shaped limiting block and an inclined limiting block to form a dynamic positioning system capable of effectively addressing the positioning needs of complex-shaped workpieces. The slow rotation of the turntable is driven by the reciprocating motion of the support platform, avoiding the introduction of an additional power source. Simultaneously, a pawl structure limits the rotation direction of the main pulley, ensuring the turntable's rotation is controllable. Furthermore, a cleaning device within the auxiliary housing, through a sliding rod contacting the turntable surface, removes residue, further improving positioning accuracy. The elastic sealing layer ensures a dust-free environment inside the auxiliary housing, preventing external impurities from interfering with the cleaning process.

[0014] The detection chamber of this invention is combined with a support platform through a transparent observation window, facilitating real-time monitoring of the workpiece's positioning status. The application of an electromagnetic clutch enables flexible transmission control between the auxiliary pulley and the turntable, making the entire device more intelligent and efficient. The design of the discharge port door facilitates the removal and replacement of workpieces, enhancing the overall ease of operation. Attached Figure Description

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

[0016] Figure 2 This is a side sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the support platform of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the auxiliary box.

[0019] The attached diagram is labeled as follows: 1. Base; 2. Drive mechanism; 3. Support platform; 4. Support plate; 5. Guide rail; 6. Crank-connecting rod structure; 7. Guide plate; 8. Turntable; 9. Arc-shaped limiting block; 10. Inclined limiting block; 11. Main pulley; 12. Pawl structure; 13. Reducer; 14. Auxiliary housing; 15. Secondary pulley; 16. Slide rod; 17. Strip block; 18. Cleaning device; 19. Elastic sealing layer; 20. Detection housing; 21. Image acquisition device; 22. Transparent observation window; 23. Electromagnetic clutch; 24. Discharge port. Detailed Implementation

[0020] This utility model relates to an ultrasonic welding fixture, the structure of which is as follows: Figures 1 to 4 As shown, the main components include a base 1, a drive mechanism 2, a support platform 3, a support plate 4, a guide rail 5, a crank-connecting rod structure 6, a guide plate 7, a positioning assembly, and an auxiliary housing 14. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] The base 1 is the fundamental component of the entire device. A drive mechanism 2 is fixedly mounted on one side of its top, while a support plate 4 is installed on the other side via bolts or other fixing methods. A pair of spaced-apart guide rails 5 are fixedly installed between the support plate 4 and the drive mechanism 2 to guide the reciprocating movement of the support platform 3. The support platform 3 is located between the two guide rails 5, and its bottom is equipped with a main pulley 11 that mates with the guide rails 5. A pawl structure 12 is installed on the main pulley 11 to limit the direction of rotation. The top of the support platform 3 is open, facilitating the placement and removal of workpieces. The output end of the drive mechanism 2 is connected to the support platform 3 via a crank-connecting rod structure 6. When the drive mechanism 2 operates, the crank-connecting rod structure 6 drives the support platform 3 to reciprocate along the guide rails 5. An inclined guide plate 7 is also fixedly connected to the base 1. The guide plate 7 is located at the bottom of the support platform 3 and helps to stabilize the movement trajectory of the support platform 3.

[0022] The support platform 3 is equipped with a positioning assembly, which mainly includes a turntable 8, an arc-shaped limiting block 9, and an inclined limiting block 10. The turntable 8 is rotatably mounted inside the support platform 3 via bearings, and multiple evenly arranged positioning grooves are formed on the surface of the turntable 8 to accommodate the workpiece to be welded. The arc-shaped limiting block 9 and the inclined limiting block 10 are fixedly connected to the inner walls of both sides of the support platform 3, with two arc-shaped limiting blocks 9 spaced apart along the axial direction of the turntable 8, and two inclined limiting blocks 10 spaced apart along the radial direction of the turntable 8. The height of both the arc-shaped limiting block 9 and the inclined limiting block 10 is greater than the height of the axis of the turntable 8, and both are tightly fitted to the surface of the turntable 8. The arc-shaped limiting block 9, the inclined limiting block 10, the top surface of the turntable 8, and the inner wall of the support platform 3 together form a positioning cavity for precise positioning of the workpiece. A reducer 13 is fixedly installed on the outer surface of the support platform 3. One end of the reducer 13 is connected to the main pulley 11, and the other end is connected to the turntable 8, thereby converting the reciprocating movement of the support platform 3 into the slow rotation of the turntable 8.

[0023] An auxiliary housing 14 is fixedly connected to the side of the support platform 3 away from the drive mechanism 2. Auxiliary pulleys 15 are rotatably mounted on both sides of the auxiliary housing 14, cooperating with the guide rail 5 to further improve the stability of the support platform 3's movement. The auxiliary housing 14, auxiliary pulleys 15, main pulley 11, and turntable 8 are all in the same plane to ensure coordinated transmission between components. A rectangular window is provided at the junction of the support platform 3 and the auxiliary housing 14. A vertically mounted guide column is fixedly connected inside the auxiliary housing 14, and a horizontally mounted slide rod 16 is slidably connected to the guide column. A strip block 17 is fixedly connected to one end of the slide rod 16 facing the rectangular window, and a cleaning device 18 is provided on the strip block 17 to remove residue from the surface of the turntable 8. A double-ended bracket is connected to the other end of the slide rod 16, and pins are fixedly connected to both ends of the double-ended bracket. Turntables are provided on both sides inside the auxiliary housing 14, and elliptical holes that cooperate with the pins are provided on the turntables. When the support platform 3 moves back and forth, the engagement of the elliptical hole and the pin causes the cleaning device 18 at one end of the slide rod 16 to move back and forth, thereby contacting the surface of the turntable 8 and completing the cleaning operation.

[0024] An elastic sealing layer 19 is fixedly connected to the slide rod 16. The elastic sealing layer 19 is sealed to the inner wall of the auxiliary housing 14 and is located between the guide column and the strip block 17. The elastic sealing layer 19 divides the internal space of the auxiliary housing 14 into a dust-free area. The double-end bracket and the turntable are both located in the dust-free area to prevent external impurities from interfering with the cleaning process. Airflow channels are provided in both the strip block 17 and the slide rod 16. Multiple air holes are provided on the side of the strip block 17 near the cleaning device 18. An exhaust pipe connected to the airflow channel is fixedly connected to the double-end bracket. An air inlet pipe is fixedly installed on the top of the auxiliary housing 14. One-way valves are provided on both the exhaust pipe and the air inlet pipe. A dust cover is fixedly connected to the top of the air inlet pipe to ensure directional airflow.

[0025] A detection chamber 20 is fixedly connected to one side of the support platform 3 opposite to the rectangular window. An image acquisition device 21 is installed inside the detection chamber 20 for real-time monitoring of the workpiece's positioning status. A transparent observation window 22 is fixedly installed at the junction of the detection chamber 20 and the support platform 3, allowing operators to easily view the workpiece's positioning. Electromagnetic clutches 23 are fixedly connected to both sides of the auxiliary chamber 14 for flexible transmission control between the auxiliary pulley 15 and the turntable 8. A discharge port door 24, which can be closed or opened, is provided on one side of the positioning cavity in the support platform 3 for convenient workpiece removal and replacement.

[0026] The working principle of this utility model is as follows: The drive mechanism 2 drives the support platform 3 to reciprocate along the guide rail 5 through the crank-connecting rod structure 6. The main pulley 11 of the support platform 3 rolls on the guide rail 5, and the pawl structure 12 on the main pulley 11 restricts the rotation direction of the main pulley 11. The main pulley 11 converts the reciprocating movement of the support platform 3 into the slow rotation of the turntable 8 through the reducer 13. The rotation of the turntable 8 causes the positioning groove area to switch sequentially, thereby realizing multiple positioning processes of the workpiece at different positions. The arc-shaped limiting block 9 and the inclined limiting block 10 are in close contact with the surface of the turntable 8 to form a dynamic positioning system, ensuring the accurate positioning of workpieces with complex shapes. When the support platform 3 reciprocates, the elliptical hole in the auxiliary housing 14 cooperates with the pin to push the slide rod 16 to reciprocate. The cleaning device 18 on the slide rod 16 reciprocates accordingly and contacts the surface of the turntable 8 to complete the cleaning operation. The elastic sealing layer 19 ensures a dust-free environment inside the auxiliary housing 14 and prevents external impurities from interfering with the cleaning process. The image acquisition device 21 inside the detection chamber 20 monitors the positioning status of the workpiece in real time through the transparent observation window 22. The electromagnetic clutch 23 realizes flexible transmission control between the auxiliary pulley 15 and the turntable 8. The discharge port door 24 facilitates the removal and replacement of the workpiece.

[0027] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0028] First, the complex-shaped workpiece to be welded is placed in the opening structure at the top of the support platform 3, ensuring that the workpiece can be embedded in the positioning groove on the surface of the turntable 8. Through the tight fit between the arc-shaped limiting block 9 and the inclined limiting block 10 and the surface of the turntable 8, a dynamic positioning cavity is formed to initially restrict the position of the workpiece. The arc-shaped limiting blocks 9 are spaced apart along the axial direction of the turntable 8, while the inclined limiting blocks 10 are spaced apart radially. Their combined action makes the positioning of the workpiece on the turntable 8 more precise and stable.

[0029] Subsequently, drive mechanism 2 is activated, which drives the support platform 3 to reciprocate along guide rail 5 via crank-connecting rod structure 6. The main pulley 11 at the bottom of the support platform 3 rolls on guide rail 5, while the pawl structure 12 on the main pulley 11 restricts its rotation direction, ensuring that the movement trajectory of the support platform 3 remains unidirectional. This reciprocating movement is transmitted to turntable 8 via reducer 13, causing it to rotate slowly. The slow rotation of turntable 8 causes the positioning groove areas to switch sequentially, thereby achieving multiple positioning processes for the workpiece at different positions. During this process, the arc-shaped limiting block 9 and the inclined limiting block 10 maintain a tight fit with the surface of turntable 8, further ensuring the accuracy of the workpiece during each positioning.

[0030] As the support platform 3 reciprocates, the elliptical hole in the auxiliary housing 14 engages with the pin to push the slide bar 16 to reciprocate. The strip block 17 at one end of the slide bar 16 moves accordingly, and the cleaning device 18 on it contacts the surface of the turntable 8 to remove residue. The elastic sealing layer 19 divides the interior space of the auxiliary housing 14 into a dust-free area, preventing external impurities from interfering with the cleaning process. The airflow channels in the strip block 17 and the slide bar 16 are connected to the exhaust pipe through air holes, and the dust cover at the top of the air inlet pipe ensures directional airflow, thereby further improving the cleaning effect.

[0031] Meanwhile, the image acquisition device 21 inside the inspection chamber 20 monitors the workpiece's positioning status in real time through the transparent observation window 22. Operators can check through the observation window whether the workpiece is accurately embedded in the positioning slot and adjust parameters as needed. The electromagnetic clutch 23 controls the transmission relationship between the auxiliary pulley 15 and the turntable 8, ensuring smooth and flexible operation of the entire device. After welding is completed, the discharge port 24 is opened, the workpiece is removed, and a new workpiece to be welded is replaced.

[0032] In the above steps, the slow rotation of turntable 8 is driven by the reciprocating movement of the support platform 3, avoiding the introduction of an additional power source. Simultaneously, the rotation direction of the main pulley 11 is limited by the pawl structure 12, ensuring the controllability of turntable 8's rotation. The design of the arc-shaped limiting block 9 and the inclined limiting block 10 effectively addresses the positioning requirements of complex-shaped workpieces, improving positioning accuracy. The reciprocating motion of the cleaning device 18, in conjunction with the elastic sealing layer 19, ensures the cleanliness of the turntable 8 surface, further enhancing the working performance of the positioning cavity. The application of the image acquisition device 21 and the electromagnetic clutch 23 enhances the intelligence level of the device, while the design of the discharge port door 24 improves operational convenience.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic welding fixture comprising: The base (1) has a drive mechanism (2) on one side of its top, and is characterized in that it further includes: The top of the support platform (3) is open. A support plate (4) is fixedly installed on the other side of the top of the base (1). A guide rail (5) is fixed between the drive mechanism (2) and the support plate (4). The support platform (3) is located between the guide rails (5). The output end of the drive mechanism (2) is a crank-connecting rod structure (6) connected to the support platform (3). The drive mechanism (2) is used to drive the support platform (3) to move back and forth on the guide rail (5) through the crank-connecting rod structure (6). An inclined guide plate (7) is fixedly connected to the base (1). The guide plate (7) is located at the bottom of the support platform (3). Positioning component; The positioning component is located inside the support platform (3). The positioning component includes a turntable (8) rotatably disposed inside the support platform (3). The turntable (8) has multiple evenly arranged positioning grooves. The positioning component also includes two arc-shaped limiting blocks (9) and two inclined limiting blocks (10). The two arc-shaped limiting blocks (9) are spaced apart along the axial direction of the turntable (8) and fixedly connected to the inner walls of both sides of the support platform (3). The two inclined limiting blocks (10) are spaced apart along the radial direction of the turntable (8) and fixedly connected to the inner walls of both sides of the support platform (3). The height of the arc-shaped limiting blocks (9) and the inclined limiting blocks (10) is greater than the height of the axis of the turntable (8). The arc-shaped limiting blocks (9) and the inclined limiting blocks (10) are both in contact with the surface of the turntable (8). The arc-shaped limiting blocks (9), the inclined limiting blocks (10), the top surface of the turntable (8) and the inner wall of the support platform (3) form a positioning cavity. Both sides of the support platform (3) are provided with main pulleys (11) that cooperate with two guide rails (5). The main pulleys (11) are provided with pawl structures (12) with directional rotation function. The main pulleys (11) and the turntable (8) are connected by a reducer (13) fixedly installed on the outer surface of the support platform (3).

2. An ultrasonic welding mold according to claim 1, wherein An auxiliary box (14) is fixedly connected to the side of the support platform (3) away from the drive mechanism (2). A secondary pulley (15) that cooperates with the guide rail (5) is rotatably arranged on both sides of the auxiliary box (14). The auxiliary box (14), the secondary pulley (15), the main pulley (11) and the turntable (8) are all in the same plane.

3. An ultrasonic welding mold according to claim 2 wherein, A rectangular window is provided at the joint between the support platform (3) and the auxiliary box (14). A vertically arranged guide column is fixedly connected inside the auxiliary box (14). A horizontally arranged slide rod (16) is slidably connected to the guide column. A strip block (17) is fixedly connected to one end of the slide rod (16) facing the rectangular window. A cleaning device (18) is provided on the strip block (17). A double-end bracket is connected to the other end of the slide rod (16). Both ends of the double-end bracket are fixedly connected with pins. Turntables that are driven and connected to the auxiliary pulley (15) are provided on both sides inside the auxiliary box (14). An elliptical hole that cooperates with the pin is provided on the turntable. When the support platform (3) moves back and forth, the cleaning device (18) at one end of the slide rod (16) moves back and forth through the cooperation of the turntable and the pin, so that it contacts the surface of the turntable (8).

4. An ultrasonic welding mold according to claim 3, wherein An elastic sealing layer (19) is fixedly connected to the slide rod (16). The elastic sealing layer (19) is sealed to the inner wall of the auxiliary box (14). The elastic sealing layer (19) is located between the guide column and the strip block (17). The elastic sealing layer (19) isolates the internal space of the auxiliary box (14) into a dust-free area. The double-end bracket and the turntable are both located in the dust-free area.

5. An ultrasonic welding mold according to claim 4 wherein, Airflow channels are provided in both the strip block (17) and the slide bar (16). Multiple air holes are provided on one side of the cleaning device (18) on the strip block (17). An exhaust pipe connected to the airflow channel is fixedly connected to the double-end bracket. An air inlet pipe is fixedly provided on the top of the auxiliary box (14). A one-way valve is provided on both the exhaust pipe and the air inlet pipe. A dust cover is fixedly connected to the top of the air inlet pipe.

6. An ultrasonic welding mold according to claim 3 wherein, A detection box (20) is fixedly connected to one side of the support platform (3) opposite to the rectangular window. An image acquisition device (21) is installed inside the detection box (20). A transparent observation window (22) is fixedly installed at the joint between the detection box (20) and the support platform (3). Electromagnetic clutches (23) for driving the auxiliary pulley (15) and the turntable are fixedly connected to both sides of the auxiliary box (14).

7. An ultrasonic welding fixture according to claim 1, characterized in that, The support platform (3) has a discharge port door (24) on one side of the positioning cavity that can be closed or opened.

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