Ultrasonic welding device and welding method thereof
By combining the adjustment and lifting mechanism of the ultrasonic welding device with a laser rangefinder, the problem of flexible adaptation to tubular workpieces of various sizes is solved, achieving an efficient and stable welding process. Furthermore, the buffer mechanism protects the equipment, improving welding quality and safety.
Patent Information
- Application Number
- CN202511104837.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-12-16
AI Technical Summary
Existing tubular workpiece welding equipment lacks the ability to flexibly adapt to various sizes. The adjustment process is cumbersome and easily affected by human factors, resulting in unstable welding quality. Furthermore, the high friction between the clamping plate and the workpiece can easily cause surface damage.
The design employs a combination of adjustment, lifting, and buffer mechanisms. The clamping plate is adaptively adjusted by the meshing of the gear and gear ring driven by the motor. Combined with real-time adjustment by the laser rangefinder, it ensures welding accuracy and stability, and the buffer mechanism protects the equipment during movement.
It enables rapid and precise welding of tubular workpieces of different sizes, reduces human error, improves welding efficiency and quality, reduces the risk of equipment damage, and extends service life.
Smart Images
Figure CN121131968A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding device and a welding method thereof. BACKGROUND
[0002] Ultrasonic welding technology is widely used in the connection of materials such as metal and plastic. It relies on high-frequency acoustic vibrations to generate local high temperature on the contact surface, thereby realizing the combination of substances. Compared with traditional welding methods, ultrasonic welding has the advantages of fast speed, concentrated energy, small heat-affected zone, high joint strength, etc., and does not need to use welding materials or chemical additives, reducing environmental pollution and safety risks. This technology is widely used in the automotive, electronics, electrical appliances, medical and other industries, especially in the precision welding of small parts.
[0003] Most of the existing pipe-shaped workpiece welding devices use manual adjustment of clamps or manual adjustment of clamping plates to adapt to different sizes of workpieces. Although this method can meet certain welding needs, in a diversified and batch production environment, the adjustment process is tedious and easily affected by human factors, resulting in inaccurate adjustment or wasted time. In addition, the traditional device has a large friction between the clamping plate and the workpiece during the adjustment process, which can easily damage the surface of the workpiece and affect the welding quality. Even some high-end equipment is equipped with automatic adjustment function, but it is usually designed for a single size of workpiece and lacks flexibility in adapting to multiple sizes of pipe-shaped workpieces. SUMMARY
[0004] The purpose of the present application is to provide an ultrasonic welding device and a welding method thereof, which solves the problem of lack of flexibility in adapting to multiple sizes of pipe-shaped workpieces provided in the background technology.
[0005] In a first aspect, the present application provides an ultrasonic welding device using the following technical solution: An ultrasonic welding device, comprising a welding frame, a adjusting mechanism is arranged on the side wall of the welding frame, a fixing frame is fixedly connected to the side wall of the welding frame, a welding assembly is arranged on the side wall of the fixing frame, a vehicle body is arranged at the bottom of the welding frame, a lifting mechanism is arranged in the vehicle body and connected with the welding frame, a cavity is formed in the vehicle body, and a buffer mechanism is arranged in the cavity. The adjusting mechanism comprises a swivel ring and a clamping plate, the swivel ring is rotatably connected to the side wall of the welding frame, a guide frame is rotatably connected to the inside of the swivel ring, the clamping plate is slidably connected to the inside of the guide frame, one side of the clamping plate is rotatably connected to the side wall of the welding frame, a gear ring is fixedly connected to the side wall of the swivel ring, a motor one is arranged in the welding frame, the output end of the motor one penetrates through the side wall of the welding frame and is fixedly connected with a gear, and the gear is engaged with the gear ring.
[0006] Preferably, the clamping plate is internally provided with a plurality of rolling balls distributed along the length direction of the clamping plate.
[0007] Preferably, the welding assembly comprises a cylinder, a telescopic arm, a transducer and a welding head, the cylinder is arranged in the inner ring of the fixed frame, the telescopic arm is fixedly connected to the output end of the cylinder, the transducer is fixedly connected to one side of the telescopic arm, the side wall of the transducer is provided with the welding head, and the side wall of the fixed frame is provided with a laser ranging sensor.
[0008] Preferably, the welding assembly is arranged in the inner ring of the fixed frame in a ring array, and the laser ranging sensor is electrically connected between the motor.
[0009] Preferably, the lifting mechanism comprises a limiting frame, a lifting plate and a screw rod, the top of the vehicle body is fixedly connected with a shielding cover, the inside of the shielding cover is fixedly connected with a support frame, the top of the support frame is fixedly connected with a mounting plate, the top of the mounting plate is rotatably connected with the screw rod, the lifting plate is threadedly connected outside the screw rod, the top of the welding frame is fixedly connected with the limiting frame, and the side wall of the lifting plate is slidably connected inside the limiting frame.
[0010] Preferably, the bottom of the mounting plate is fixedly connected with a motor two, the output end of the motor two is fixedly connected with the screw rod, and the motor two is electrically connected with the laser ranging sensor.
[0011] Preferably, the top of the mounting plate is fixedly connected with a telescopic rod, the top end of the telescopic rod is fixedly connected with a connecting block, the top wall of the lifting plate is fixedly connected with a connecting sleeve, the connecting block is embedded in the inside of the connecting sleeve, and the connecting block is fixedly connected to the side wall of the welding frame.
[0012] Preferably, the buffer mechanism comprises a bottom plate, a pad and a damper, the bottom plate is fixedly connected inside the cavity, the front side of the cavity is provided with a bumper plate, the damper is fixedly connected between the bottom plate and the bumper plate, and the side wall of the bumper plate is fixedly connected with the pad.
[0013] Preferably, the inside of the bottom plate is fixedly connected with a guide rod, the side wall of the guide rod is slidably connected with a sliding sleeve, one side of the side wall of the sliding sleeve is fixedly connected with a fixed ring one, the inside of the fixed ring one is rotatably connected with a rotating plate, one side of the rotating plate is rotatably connected with a fixed ring two, the fixed ring two is fixedly connected to the side wall of the bumper plate, springs are fixedly connected between the guide rods, and the springs are sleeved outside the guide rods.
[0014] In the second aspect, the ultrasonic welding method provided by the present application adopts the following technical scheme: Pre-set position: first, start the vehicle body to move the welding frame to the position of the tubular workpiece to be processed, and ensure that the welding frame is aligned with the tubular workpiece; Adjusting the position of the clamping plate: by driving the rotating ring to rotate through the motor, the guide frame and the clamping plate are adjusted, so that one side of the clamping plate moves to the outside of the workpiece and the ball is attached to the outside of the workpiece, ensuring that the clamping plate tightly fastens the workpiece; Lifting adjustment: start motor 2, move the lifting plate up and down through the screw rod, so that the welding frame is accurately aligned with the workpiece to be processed, and enters the suitable welding height; Laser ranging monitoring: the laser ranging sensor monitors the changes of the moving path in front of it in real time, automatically detects the changes of the pipe diameter, and if there are changes, automatically adjusts the distance between the clamping plates to maintain the stability of the clamped workpiece; Welding operation: after the welding frame and the workpiece are connected, the cylinder drives the telescopic arm to press the transducer and the welding head against the surface of the workpiece, starts the ultrasonic welding process, generates high-frequency acoustic energy through the vibration of the transducer, and realizes welding; Collision protection: during the movement of the device, if an obstacle or external impact force is encountered, the bumper plate and the buffer mechanism will automatically relieve the impact force, absorb the impact through the spring and damper, and protect the device from damage; Complete welding: after the welding is completed, the welding frame moves again through the vehicle body, moves the welded workpiece out and prepares for the next step.
[0015] In summary, the present application has the following at least one beneficial technical effect: 1、The present application comprises an adjusting mechanism composed of a rotating ring, a guide frame and a clamping plate, and a gear driven by a motor is engaged with the gear ring to realize self-adaptive adjustment of the clamping plate to different size tubular workpieces. The clamping plate is internally provided with a ball to reduce friction between the clamping plate and the workpiece during adjustment. Through the cooperation between the above-mentioned structures, different diameter tubular workpieces can be quickly and accurately adapted, the accuracy of welding positioning is improved, human error is reduced, and the overall welding efficiency and quality are improved.
[0016] 2、The present application comprises a screw rod and a lifting plate structure driven by a motor inside the vehicle body, which cooperates with the limiting frame to realize the lifting of the welding frame in the vertical direction, and combines with the laser ranging sensor to realize real-time sensing and dynamic adjustment of the workpiece height, which can cope with different workstations and changes in workpiece height, ensure that the welding head is always at the best welding height, and improve the adaptability, stability and welding quality of the welding operation.
[0017] 3、The present application comprises a buffer mechanism composed of bumper plates, dampers, pads and springs arranged at the front end of the vehicle body. When the vehicle body encounters an obstacle during movement, the impact force can be absorbed through mechanical deformation and damping, and automatic reset is realized at the same time. Through the cooperation between the above-mentioned structures, the risk of structural damage of the device caused by accidental collision is reduced, and the safety and service life of the overall device are improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a perspective view of the present application; Figure 2 is a side view of the welding frame of the present application; Figure 3 is a structural schematic view of the adjusting mechanism of the present application; Figure 4 is a split structural schematic view of the adjusting mechanism of the present application; Figure 5 is a side view of the welding assembly of the present application; Figure 6 is a structural schematic view of the lifting mechanism of the present application; Figure 7 is a sectional view of the lifting mechanism of the present application; Figure 8 is a structural schematic view of the vehicle body of the present application; Figure 9 is Figure 8 is an enlarged structural schematic view at A in FIG. 6.
[0019] wherein 1, welding frame; 2, motor one; 3, rotating ring; 4, guide frame; 5, clamping plate; 6, gear ring; 7, gear; 8, ball; 9, fixed frame; 10, air cylinder; 11, telescopic arm; 12, transducer; 13, welding head; 14, laser ranging sensor; 15, vehicle body; 16, shielding cover; 17, support frame; 18, mounting plate; 19, telescopic rod; 20, connecting block; 21, limiting frame; 22, lifting plate; 23, screw; 24, connecting sleeve; 25, cavity; 26, bottom plate; 27, guide rod; 28, sliding sleeve; 29, spring; 30, fixed ring one; 31, anti-collision plate; 32, fixed ring two; 33, rotating plate; 34, pad plate; 35, motor two; 36, damper. DETAILED DESCRIPTION
[0020] The following will be described in detail below in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 9 , the present application will be further described in detail.
[0021] The embodiment 1 is an ultrasonic welding device, which comprises a welding frame 1, the welding frame 1 serves as a basic support structure of the whole device, provides a platform for the installation of other functional components, ensures the overall rigidity and stability of the welding operation, the side wall of the welding frame 1 is provided with an adjusting mechanism to adapt to different sizes of tubular workpieces, the side wall of the welding frame 1 is fixedly connected with a fixing frame 9, which provides a mounting base for the assembly of welding components, the side wall of the fixing frame 9 is provided with a welding assembly, which is the core unit for performing ultrasonic welding, generates energy through high-frequency vibration to realize rapid welding of the workpiece, the bottom of the welding frame 1 is provided with a vehicle body 15, so that the whole welding device can move, improving the flexibility and efficiency of production deployment, the inside of the vehicle body 15 is provided with a lifting mechanism and is connected with the welding frame 1, which can drive the whole welding frame 1 to move vertically, so that the height of the welding head 13 can be flexibly adjusted according to the operation demand and the height of the workpiece, which is convenient for alignment and operation, the inside of the vehicle body 15 is provided with a cavity 25, and the inside of the cavity 25 is provided with a buffer mechanism, which can protect the vehicle body 15 from being damaged when it encounters obstacles in front during movement; The adjusting mechanism comprises a rotating ring 3 and a clamping plate 5, the rotating ring 3 is rotatably connected to the side wall of the welding frame 1 and rotates around the welding frame 1 as the axis, the inside of the rotating ring 3 is rotatably connected with a guide frame 4, the guide frame 4 can rotate inside the rotating ring 3, further increasing the freedom degree of adjustment, the inside of the guide frame 4 is slidably connected with the clamping plate 5, one side of the clamping plate 5 is rotatably connected to the side wall of the welding frame 1, when the rotating ring 3 rotates, it drives the guide frame 4 to move, and in turn drives the clamping plate 5 to deflect, the side wall of the rotating ring 3 is fixedly connected with a gear ring 6, the inside of the welding frame 1 is provided with a motor one 2, the output end of the motor one 2 penetrates through the side wall of the welding frame 1 and is fixedly connected with a gear 7, the gear 7 is engaged with the gear ring 6, the gear 7 can be driven to rotate by starting the motor one 2, in turn controls the rotation of the rotating ring 3 through the engagement with the gear ring 6, and in turn drives the clamping plate 5 to move, the inside of the clamping plate 5 is provided with a plurality of ball bearings 8, the ball bearings 8 are distributed along the length direction of the clamping plate 5, with the movement of the clamping plate 5, the ball bearings 8 will finally adhere to the outside of the tubular workpiece, which can ensure the stability of the welding frame 1 and reduce the friction when moving.
[0022] The welding assembly comprises a cylinder 10, a telescopic arm 11, a transducer 12 and a welding head 13, the cylinder 10 is arranged in the inner ring of the fixed frame 9, the telescopic arm 11 is fixedly connected to the output end of the cylinder 10, the transducer 12 is fixedly connected to one side of the telescopic arm 11, the transducer 12 can efficiently convert the input electric energy into high-frequency mechanical vibration energy, providing the fundamental energy basis for ultrasonic welding, the side wall of the transducer 12 is provided with the welding head 13, the welding head 13 as the final component in contact with the workpiece, can effectively amplify and conduct the mechanical vibration from the transducer 12, and focus this high-frequency vibration energy together with the pressure applied by the cylinder 10 to the welding area of the workpiece, so that the contact point produces intense friction and melts instantaneously, so as to realize firm welding, by controlling the telescopic of the cylinder 10, the whole welding mechanism can be driven to advance or retreat, so as to accurately press or separate the welding head 13 from the surface of the workpiece, ensuring that appropriate pressure is applied during welding, the side wall of the fixed frame 9 is provided with a laser ranging sensor 14, the laser ranging sensor 14 can accurately measure the distance between the welding device and the surface of the workpiece to be welded in real time and non-contact, the welding assembly is arranged in the inner ring of the fixed frame 9 in a ring array, the laser ranging sensor 14 is electrically connected between the motor 1 and 2, when the laser ranging sensor 14 detects that the diameter of the tubular workpiece changes, it will immediately feed back the signal to the motor 1 and 2, and then the motor 1 and 2 drives the adjusting mechanism to make accurate compensation, ensuring the stability of the connection between the welding frame 1 and the tubular workpiece.
[0023] The lifting mechanism comprises a limiting frame 21, a lifting plate 22 and a screw rod 23, realizes accurate lifting adjustment of the welding frame 1 in the vertical direction, so as to adapt to welding operations of different heights or different stations, the top of the vehicle body 15 is fixedly connected with a shielding cover 16, the shielding cover 16 is used for protecting internal components of the lifting mechanism, prolonging the service life of the equipment, the shielding cover 16 is fixedly connected with a support frame 17 inside, the support frame 17 is fixedly connected with a mounting plate 18 at the top, the screw rod 23 is rotatably connected at the top of the mounting plate 18, the lifting plate 22 is threadedly connected outside the screw rod 23, the screw rod 23 drives the lifting plate 22 threadedly connected therewith to move up and down along the vertical direction through rotation, rotation movement is converted into linear displacement, so as to realize lifting adjustment of the welding frame 1, the limiting frame 21 is fixedly connected at the top of the welding frame 1, the side wall of the lifting plate 22 is slidably connected inside the limiting frame 21, the limiting frame 21 plays a double role of guiding and limiting, so that the lifting plate 22 always runs in a predetermined track during lifting, preventing deviation, the bottom of the mounting plate 18 is fixedly connected with a motor two 35, the output end of the motor two 35 is fixedly connected with the screw rod 23, the motor two 35 is electrically connected between the laser ranging sensor 14, through receiving signals transmitted by the laser ranging sensor 14, the motor two 35 can drive the screw rod 23 to rotate, thereby changing the height of the welding frame 1, the top of the mounting plate 18 is fixedly connected with a telescopic rod 19, the top end of the telescopic rod 19 is fixedly connected with a connecting block 20, which is used for auxiliary positioning and dynamic connection of the welding frame 1, the top wall of the lifting plate 22 is fixedly connected with a connecting sleeve 24, the connecting block 20 is embedded inside the connecting sleeve 24, and the connecting block 20 is fixedly connected to the side wall of the welding frame 1.
[0024] The buffer mechanism comprises a bottom plate 26, a pad plate 34 and a damper 36, the bottom plate 26 is fixedly connected inside the cavity 25, provides mounting space for other components, the front side of the cavity 25 is provided with a bumper plate 31, which is used for blocking objects on the path, avoiding damage to the equipment during movement due to collision, the damper 36 is fixedly connected between the bottom plate 26 and the bumper plate 31, when the bumper plate 31 is impacted and moves backward, the impact force generated by the impact is conducted to the inside of the damper 36, the side wall of the bumper plate 31 is fixedly connected with the pad plate 34, which plays a cushioning and protection role, reduces direct contact of the bumper plate 31 with the surrounding environment or objects, and enhances the damping effect, the inside of the bottom plate 26 is fixedly connected with a guide rod 27, the side wall of the guide rod 27 is slidably connected with a sliding sleeve 28, one side of the side wall of the sliding sleeve 28 is fixedly connected with a fixed ring one 30, the inside of the fixed ring one 30 is rotatably connected with a rotating plate 33, one side of the rotating plate 33 is rotatably connected with a fixed ring two 32, and the fixed ring two 32 is fixedly connected to the side wall of the bumper plate 31, when the bumper plate 31 moves backward, one side of the rotating plate 33 is deflected, the other side is deflected on the sliding sleeve 28 and moves the sliding sleeve 28, the guide rods 27 are fixedly connected with springs 29 between them, providing a force for automatic reset of the buffer mechanism, and the springs 29 are sleeved outside the guide rods 27.
[0025] Embodiment 2: An ultrasonic welding method, comprising the following steps: Pre-set position: First, start the vehicle body 15 to move the welding stand 1 to the position of the tubular workpiece to be processed, ensuring that the welding stand 1 is aligned with the tubular workpiece.
[0026] Adjust the position of the clamping plate 5: Rotate the rotating ring 3 by motor 1 2, drive the guide frame 4 and the clamping plate 5 to adjust, move one side of the clamping plate 5 to the outside of the workpiece and stick the ball 8 to the outside of the workpiece, ensuring that the clamping plate tightens the workpiece.
[0027] Lift adjustment: Start motor 2 35, move the lifting plate 22 up and down by screw rod 23, so that the welding stand 1 is accurately aligned with the workpiece to be processed, and enters the appropriate welding height.
[0028] Laser ranging monitoring: The laser ranging sensor 14 monitors the changes of the moving path in front of it in real time, automatically detects the changes of the pipe diameter, and if there are changes, it will automatically adjust the distance between the clamping plates 5 to maintain the stability of clamping the workpiece.
[0029] Welding operation: After the welding stand 1 and the workpiece are butt jointed, the cylinder 10 drives the telescopic arm 11 to press the transducer 12 and the welding head 13 against the surface of the workpiece, starts the ultrasonic welding process, generates high-frequency acoustic energy through the vibration of the transducer 12, and realizes welding.
[0030] Collision protection: During the movement of the equipment, if obstacles or external impact forces are encountered, the anti-collision plate 31 and the buffer mechanism will automatically relieve the impact force, absorb the impact through the spring 29 and the damper 36, and protect the equipment from damage.
[0031] Complete welding: After the welding is completed, the welding stand 1 is moved again by the vehicle body 15 to move the welded workpiece out and prepare for the next step.
[0032] Working principle: when the device is moved, the screw rod 23 is driven to rotate by starting the motor 2, the lifting plate 22 slides upward in the limiting frame 21, the welding frame 1 is lifted upward, the welding frame 1 can be aligned with the pipe-shaped workpiece to be processed, then the device is moved by the vehicle body 15, the welding frame 1 is sleeved outside the workpiece, the gear 7 is driven to rotate by starting the motor 1, the gear ring 6 drives the rotating ring 3 to rotate, the rotating ring 3 drives the guide frame 4 to move and deflect the clamping plate 5 at the same time, the ball 8 is finally attached to the outside of the workpiece, with the movement of the device, when it moves to the welding area, the cylinder 10 drives the telescopic arm 11 to move, the welding head 13 is pressed outside the workpiece, the welding work can be carried out by the vibration of the transducer 12, the laser ranging sensor 14 detects the front moving path all the time, when the pipe diameter changes, the motor 2 can be controlled to drive the rotating ring 3 to rotate, the distance between the clamping plates 5 is changed to adapt to the change of the moving path, when the vehicle body 15 moves, obstacles appear in front or are hit by foreign matter, the impact force makes the anti-collision plate 31 slide into the cavity 25, one side of the rotating plate 33 deflects on the fixed ring 2, the other side deflects on the fixed ring 1 30 and drives the sliding sleeve 28 to move, and extrudes the spring 29 to make it deform, when the distance between the bottom plate 26 and the anti-collision plate 31 is reduced, the force is transferred to the damper 36, which can relieve the impact force through its damping characteristics, avoid the damage of the device caused by the impact, and prolong the service life of the device.
Claims
1. An ultrasonic welding apparatus, comprising a welding frame (1), characterized in that, The welding frame (1) is provided with an adjustment mechanism on its side wall. A fixed frame (9) is fixedly connected to the side wall of the welding frame (1). A welding assembly is provided on the side wall of the fixed frame (9). A vehicle body (15) is provided at the bottom of the welding frame (1). A lifting mechanism is provided inside the vehicle body (15) and connected to the welding frame (1). A cavity (25) is opened inside the vehicle body (15). A buffer mechanism is provided inside the cavity (25). The adjustment mechanism includes a rotating ring (3) and a clamping plate (5). The rotating ring (3) is rotatably connected to the side wall of the welding frame (1). A guide frame (4) is rotatably connected inside the rotating ring (3). A clamping plate (5) is slidably connected inside the guide frame (4). One side of the clamping plate (5) is rotatably connected to the side wall of the welding frame (1). A gear ring (6) is fixedly connected to the side wall of the rotating ring (3). A motor (2) is installed inside the welding frame (1). The output end of the motor (2) passes through the side wall of the welding frame (1) and is fixedly connected to a gear (7). The gear (7) meshes with the gear ring (6).
2. The ultrasonic welding apparatus according to claim 1, characterized in that, The clamp (5) is provided with a plurality of balls (8) inside, and the balls (8) are distributed along the length of the clamp (5).
3. The ultrasonic welding apparatus according to claim 1, characterized in that, The welding assembly includes a cylinder (10), a telescopic arm (11), a transducer (12), and a welding head (13). The cylinder (10) is disposed in the inner ring of the fixed frame (9). The telescopic arm (11) is fixedly connected to the output end of the cylinder (10). The transducer (12) is fixedly connected to one side of the telescopic arm (11). The welding head (13) is disposed on the side wall of the transducer (12). A laser ranging sensor (14) is disposed on the side wall of the fixed frame (9).
4. The ultrasonic welding apparatus according to claim 3, characterized in that, The welding components are arranged in a ring array in the inner ring of the fixing frame (9), and the laser range sensor (14) is electrically connected to the motor (2).
5. An ultrasonic welding apparatus according to claim 3, characterized in that, The lifting mechanism includes a limiting frame (21), a lifting plate (22), and a screw (23). A shield (16) is fixedly connected to the top of the vehicle body (15). A support frame (17) is fixedly connected inside the shield (16). An mounting plate (18) is fixedly connected to the top of the support frame (17). The screw (23) is rotatably connected to the top of the mounting plate (18). The lifting plate (22) is threadedly connected to the outside of the screw (23). The limiting frame (21) is fixedly connected to the top of the welding frame (1). The side wall of the lifting plate (22) is slidably connected inside the limiting frame (21).
6. The ultrasonic welding apparatus according to claim 5, characterized in that, The bottom of the mounting plate (18) is fixedly connected to a second motor (35), the output end of the second motor (35) is fixedly connected to a screw (23), and the second motor (35) is electrically connected to a laser rangefinder (14).
7. An ultrasonic welding apparatus according to claim 5, characterized in that, The top of the mounting plate (18) is fixedly connected to a telescopic rod (19), the top of the telescopic rod (19) is fixedly connected to a connecting block (20), the top wall of the lifting plate (22) is fixedly connected to a connecting sleeve (24), the connecting block (20) is embedded inside the connecting sleeve (24), and the connecting block (20) is fixedly connected to the side wall of the welding frame (1).
8. An ultrasonic welding apparatus according to claim 1, characterized in that, The buffer mechanism includes a base plate (26), a pad plate (34) and a damper (36). The base plate (26) is fixedly connected inside the cavity (25). A crash plate (31) is provided on the front side of the cavity (25). The damper (36) is fixedly connected between the base plate (26) and the crash plate (31). The pad plate (34) is fixedly connected to the side wall of the crash plate (31).
9. An ultrasonic welding apparatus according to claim 8, characterized in that, The bottom plate (26) is fixedly connected to a guide rod (27). The guide rod (27) is slidably connected to a sliding sleeve (28). The sliding sleeve (28) is fixedly connected to a fixing ring (30) on one side of its side wall. The fixing ring (30) is rotatably connected to a rotating plate (33). The rotating plate (33) is rotatably connected to a fixing ring (32) on one side of its side. The fixing ring (32) is fixedly connected to the side wall of the anti-collision plate (31). The guide rods (27) are fixedly connected to each other. The spring (29) is sleeved on the outside of the guide rods (27).
10. An ultrasonic welding method, applied to the ultrasonic welding apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Preset position: First, start the vehicle body (15) to move the welding frame (1) to the position of the tubular workpiece to be processed, and ensure that the welding frame (1) is aligned with the tubular workpiece; Adjust the position of the clamping plate (5): Drive the rotating ring (3) to rotate by the motor (2), and drive the guide frame (4) and clamping plate (5) to adjust, so that one side of the clamping plate (5) moves outward of the workpiece and the ball (8) fits against the outside of the workpiece, ensuring that the clamping plate secures the workpiece. Lifting adjustment: Start motor two (35), drive the lifting plate (22) to move up and down through screw (23) so that the welding frame (1) is accurately aligned with the workpiece to be processed and enters the appropriate welding height; Laser ranging monitoring: The laser ranging sensor (14) monitors the changes in the moving path in front in real time and automatically detects the changes in the pipe diameter. If there are changes, it automatically adjusts the distance between the clamping plates (5) to maintain the stability of clamping the workpiece. Welding operation: After the welding frame (1) and the workpiece are connected, the cylinder (10) drives the telescopic arm (11) to press the transducer (12) and the welding head (13) against the surface of the workpiece, and start the ultrasonic welding process. The high-frequency sound wave energy is generated by the vibration of the transducer (12) to achieve welding. Collision protection: If the equipment encounters an obstacle or external impact during movement, the anti-collision plate (31) and buffer mechanism will automatically relieve the impact force and absorb the impact through the spring (29) and damper (36) to protect the equipment from damage. Welding completed: After welding is completed, the welding frame (1) moves again through the vehicle body (15) to remove the welded workpiece and prepare it for the next step of processing.