Ultrasonic welding device and welding method

Abstract

The invention discloses an ultrasonic welding device and a welding method, and relates to the technical field of ultrasonic welding, the ultrasonic welding device comprises a machining table, an ultrasonic generator and an ultrasonic welding head, and a uniform spot welding mechanism and an adaptive pressing mechanism are mounted on the machining table. Through the arrangement of the uniform spot welding mechanism, when a servo motor is started, a hexagonal rotating rod can be driven to rotate, the hexagonal rotating rod rotates to drive an ultrasonic welding head to move up and down in a reciprocating mode through a reciprocating driving assembly to conduct spot welding work, and in the process, the hexagonal rotating rod rotates to drive a horizontal screw rod to rotate intermittently through an intermittent transmission assembly; further, the ultrasonic welding head can be driven to intermittently and horizontally move through the horizontal moving plate, so that the ultrasonic welding head can carry out spot welding work in an up-down reciprocating manner while intermittently and horizontally moving, spot welding treatment of multiple point positions can be automatically and uniformly carried out on a workpiece, time and labor are saved in use, the workload is relieved, and the work efficiency is improved. And the workpiece welding efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic welding, and in particular to an ultrasonic welding device and a welding method. Background Art

[0002] Ultrasonic welding technology uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers. It has the advantages of high efficiency, fast speed, energy saving and environmental protection, high fusion strength, no sparks, flexibility and wide applicability.

[0003] At present, when welding, due to special needs or to improve welding firmness, it is often necessary to evenly perform spot welding on multiple points on the workpiece. However, the traditional operation method is generally to manually move the workpiece to the next point for spot welding again after spot welding one welding point. The operation is not only cumbersome and time-consuming, but also has a heavy workload and will seriously affect the welding efficiency of the workpiece. Therefore, the present invention discloses an ultrasonic welding device and a welding method to meet people's needs. Summary of the invention

[0004] The purpose of the present invention is to provide an ultrasonic welding device and a welding method to solve the problem that the spot welding method of multiple uniform points by manually moving the workpiece is proposed in the above background technology, which is not only cumbersome and time-consuming, but also has a heavy workload and seriously affects the welding efficiency of the workpiece.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an ultrasonic welding device, comprising a processing table, an ultrasonic generator and an ultrasonic welding head, wherein a uniform spot welding mechanism and an adaptor clamping mechanism are installed on the processing table;

[0006] The uniform spot welding mechanism comprises a U-shaped frame fixedly mounted on the top of the processing table, and two mounting holes are provided on both sides of the U-shaped frame away from each other, wherein hexagonal rotating rods are mounted in two of the mounting rotating holes for common rotation, a servo motor is fixedly arranged on the side of the U-shaped frame, and the output end of the servo motor is fixedly connected to one end of the hexagonal rotating rod, and horizontal screws are mounted in the other two mounting rotating holes for common rotation, and a horizontal moving plate is threadedly sleeved on the horizontal screw, and the ultrasonic welding head is connected to the horizontal moving plate through a reciprocating drive assembly, and the reciprocating drive assembly is used to make the ultrasonic welding head reciprocate up and down, and the hexagonal rotating rod The rod is connected to the reciprocating drive assembly, and the hexagonal rotating rod is also connected to an intermittent transmission assembly for intermittently rotating the horizontal screw. When the servo motor is operated to rotate the hexagonal rotating rod, the rotation of the hexagonal rotating rod will drive the ultrasonic welding head to move back and forth up and down through the reciprocating drive assembly. During this process, the rotation of the hexagonal rotating rod will also drive the horizontal screw to rotate intermittently through the intermittent transmission assembly, and then the ultrasonic welding head can be driven to move intermittently horizontally through the horizontal moving plate and the reciprocating drive assembly, so that the ultrasonic welding head can perform uniform spot welding work reciprocating up and down while moving intermittently horizontally.

[0007] Preferably, the reciprocating drive assembly includes two connecting rods fixedly mounted on the top of the horizontal moving plate, the top ends of the two connecting rods are fixedly mounted with connecting bearings, a movable sleeve is commonly fixed in the two connecting bearings, the movable sleeve is slidably sleeved on the hexagonal rotating rod, an eccentric cam is fixedly sleeved on the movable sleeve, two vertical sliding holes are provided on the top of the horizontal moving plate, vertical sliding rods are slidably mounted in the two vertical sliding holes, the bottom ends of the two vertical sliding rods are commonly connected to a mounting plate, the ultrasonic welding head is fixed on the bottom of the mounting plate, a reciprocating plate is commonly fixedly mounted on the top ends of the two vertical sliding rods, the top of the reciprocating plate is fitted with the circumferential side of the eccentric cam, and a plurality of extrusion springs are commonly fixedly mounted on the top of the horizontal moving plate and the bottom of the reciprocating plate.

[0008] Preferably, the bottom ends of the two vertical sliding rods are slidably sleeved with movable cylinders, the mounting plate is fixedly mounted on the bottom ends of the two movable cylinders, a locking screw hole is opened on the side of the movable cylinder, a locking bolt is threadedly installed in the locking screw hole, and one end of the locking bolt is in conflict with the side of the vertical sliding rod.

[0009] Preferably, the intermittent transmission assembly includes an incomplete gear fixedly sleeved on the hexagonal rotating rod, a transmission rotating hole is opened on the side of the U-shaped frame, a transmission rotating shaft is rotatably installed in the transmission rotating hole, a transmission gear meshing with the incomplete gear is fixedly installed on one end of the transmission rotating shaft, a continuously variable speed wheel is fixedly sleeved on the transmission rotating shaft and the horizontal screw rod, and a transmission belt is commonly adapted and provided on the two continuously variable speed wheels.

[0010] Preferably, a guide rod is fixedly mounted on the inner wall of the side of the U-shaped frame, and the horizontal moving plate is slidably sleeved on the guide rod.

[0011] The top of the two wheels are connected with the driving wheel shaft by the spring, and the driving wheel shaft is connected with the driving wheel shaft by the spring.

[0012] Preferably, the gear transmission unit comprises two first bevel gears fixedly sleeved on the control rotating rod, and the bottom ends of the two lifting screws are fixedly mounted with second bevel gears, and the two first bevel gears are respectively meshed with the two second bevel gears.

[0013] Preferably, the fixing unit includes an adjusting rod, a sliding hole is provided at the top of the connecting sleeve, the adjusting rod is slidably installed in the sliding hole, a plurality of adjusting holes are evenly provided at the top of the L-shaped sliding rod, the bottom end of the adjusting rod extends into one of the adjusting holes, an unlocking pull block is fixedly installed at the top of the adjusting rod, and a reset element is installed on the unlocking pull block.

[0014] Preferably, the reset element comprises a reset tension spring, and two ends of the reset tension spring are respectively fixedly mounted on the top of the connecting sleeve and the bottom of the unlocking pull block.

[0015] The present invention also discloses a welding method of an ultrasonic welding device, the method comprising:

[0016] S1. Pull the unlocking block upward to release the L-shaped slide bar. At this time, the position of the pressure plate can be adjusted until the pressure plate is just above the workpiece. Then release the unlocking block to fix the L-shaped slide bar and the pressure plate.

[0017] S2, turn the control knob to drive the pressing plate to move downward through the control rod, the first bevel gear, the second bevel gear, the lifting screw, the rectangular slide bar, the connecting sleeve and the L-shaped slide bar until the workpiece is pressed and fixed on the processing table;

[0018] S3. Starting the servo motor will drive the hexagonal rotating rod to rotate, which will drive the ultrasonic welding head to move back and forth up and down. During this process, the rotation of the hexagonal rotating rod will also drive the intermittent rotation of the horizontal screw, which will drive the horizontal moving plate and the ultrasonic welding head to move intermittently horizontally, so that the ultrasonic welding head can perform uniform spot welding work while moving intermittently horizontally, so that spot welding of multiple points on the workpiece can be automatically and evenly performed.

[0019] In summary, the technical effects and advantages of the present invention are as follows:

[0020] The present invention sets a uniform spot welding mechanism. When the servo motor is started, the hexagonal rotating rod is driven to rotate. The rotation of the hexagonal rotating rod drives the reciprocating plate to move up and down through the moving sleeve, the eccentric cam and the extrusion spring, and then drives the ultrasonic welding head to move up and down through the vertical slide bar and the mounting plate to perform spot welding. In this process, the rotation of the hexagonal rotating rod also drives the horizontal screw to rotate intermittently through the incomplete gear, the transmission gear, the transmission shaft, the stepless speed change wheel and the transmission belt. The intermittent rotation of the horizontal screw drives the ultrasonic welding head to move intermittently horizontally through the horizontal movement plate, the vertical slide bar and the mounting plate. Furthermore, the ultrasonic welding head can perform spot welding while moving horizontally intermittently up and down, so that spot welding can be performed automatically and evenly on multiple points on the workpiece. The staff no longer needs to move the workpiece frequently, which saves time and effort, reduces the workload, and effectively improves the welding efficiency of the workpiece. Moreover, through the coordinated setting of the continuously variable speed wheel and the transmission belt, the transmission ratio between the hexagonal rotating rod and the horizontal screw can be changed, that is, the horizontal distance of the intermittent movement of the ultrasonic welding head each time it reciprocates up and down can be adjusted, so that the device can adapt to spot welding points with different spacings, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the enlarged three-dimensional structure of the cooperation of the horizontal moving plate, the reciprocating drive assembly and the ultrasonic welding head in the present invention;

[0024] Figure 3 It is a schematic diagram of an enlarged three-dimensional structure of the hexagonal rotating rod, the horizontal screw rod and the intermittent transmission assembly in the present invention;

[0025] Figure 4 It is an enlarged three-dimensional structural schematic diagram of the adapting and pressing mechanism in the present invention;

[0026] Figure 5 It is a partially enlarged structural schematic diagram of the connection between the connecting sleeve, the L-shaped sliding rod and the fixing unit in the present invention;

[0027] Figure 6 It is a front view structural schematic diagram of the present invention.

[0028] In the figure: 1. processing table; 2. ultrasonic generator; 3. ultrasonic welding head; 4. U-shaped frame; 5. hexagonal rotating rod; 6. horizontal screw; 7. horizontal moving plate; 8. servo motor; 9. vertical slide rod; 10. mounting plate; 11. connecting bearing; 12. moving sleeve; 13. eccentric cam; 14. reciprocating moving plate; 15. extrusion spring; 16. incomplete gear; 17. transmission shaft; 18. transmission gear; 19. stepless speed change wheel; 20. transmission belt; 21. movable cylinder; 22. locking bolt; 23. guide rod; 24. fixing plate; 25. support plate; 26. lifting screw; 27. rectangular slide rod; 28. connecting sleeve; 29. ​​L-shaped slide rod; 30. pressing plate; 31. control rotating rod; 32. control knob; 33. first bevel gear; 34. second bevel gear; 35. adjusting plug rod; 36. unlocking pull block; 37. reset spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example: Reference Figure 1-Figure 6 An ultrasonic welding device shown includes a processing table 1, an ultrasonic generator 2 and an ultrasonic welding head 3, and a uniform spot welding mechanism and an adaptor pressing mechanism are installed on the processing table 1;

[0031] The uniform spot welding mechanism includes a U-shaped frame 4 fixedly mounted on the top of the processing table 1, and two mounting holes are provided on both sides of the U-shaped frame 4 away from each other, wherein hexagonal rotating rods 5 are mounted in the two mounting rotating holes for common rotation, a servo motor 8 is fixedly provided on the side of the U-shaped frame 4, and the output end of the servo motor 8 is fixedly connected to one end of the hexagonal rotating rod 5, and a horizontal screw rod 6 is mounted in the other two mounting rotating holes for common rotation, and a horizontal moving plate 7 is threadedly sleeved on the horizontal screw 6, and the ultrasonic welding head 3 is connected to the horizontal moving plate 7 through a reciprocating drive assembly, and the reciprocating drive assembly is used to make the ultrasonic welding head 3 reciprocate up and down, and the hexagonal rotating rod 5 is connected to the reciprocating drive assembly The reciprocating drive assembly includes two connecting rods fixedly mounted on the top of the horizontal moving plate 7, and the tops of the two connecting rods are fixedly mounted with connecting bearings 11, and a moving sleeve 12 is fixedly arranged in the two connecting bearings 11. The moving sleeve 12 is slidably sleeved on the hexagonal rotating rod 5, and an eccentric cam 13 is fixedly sleeved on the moving sleeve 12. Two vertical sliding holes are provided on the top of the horizontal moving plate 7, and vertical sliding rods 9 are slidably mounted in the two vertical sliding holes. The bottom ends of the two vertical sliding rods 9 are commonly connected to a mounting plate 10, and the ultrasonic welding head 3 is fixedly mounted on the bottom of the mounting plate 10. A reciprocating moving plate 14 is commonly fixedly mounted on the tops of the two vertical sliding rods 9. The reciprocating The top of the moving plate 14 fits with the circumferential side of the eccentric cam 13, and the top of the horizontal moving plate 7 and the bottom of the reciprocating moving plate 14 are fixedly installed with multiple extrusion springs 15. The hexagonal rotating rod 5 is also connected to an intermittent transmission component for intermittently rotating the horizontal screw 6. When the servo motor 8 is started, the hexagonal rotating rod 5 will be driven to rotate, and the rotation of the hexagonal rotating rod 5 will drive the eccentric cam 13 to rotate eccentrically through the moving sleeve 12. At this time, under the cooperation of the extrusion springs 15, the eccentric rotation of the eccentric cam 13 will drive the reciprocating moving plate 14 to move back and forth up and down, and then the ultrasonic welding head 3 can be driven to move back and forth up and down through the vertical sliding rod 9 and the mounting plate 10. Spot welding is performed automatically. During this process, the rotation of the hexagonal rotating rod 5 will also drive the horizontal screw rod 6 to rotate intermittently through the intermittent transmission assembly. The intermittent rotation of the horizontal screw rod 6 will drive the horizontal moving plate 7 to move intermittently horizontally, and then the ultrasonic welding head 3 can be driven to move intermittently horizontally through the vertical sliding rod 9 and the mounting plate 10, so that the ultrasonic welding head 3 can perform uniform spot welding work while moving intermittently horizontally and reciprocating up and down, thereby achieving the purpose of automatically and evenly performing spot welding processing on multiple points on the workpiece, and there is no need for the staff to frequently move the workpiece, which saves time and effort, reduces the workload, and effectively improves the welding efficiency of the workpiece.

[0032] like Figure 2As shown, the bottom ends of the two vertical slide bars 9 are slidably sleeved with movable cylinders 21, and the mounting plate 10 is fixedly mounted on the bottom ends of the two movable cylinders 21. The side of the movable cylinder 21 is provided with a locking screw hole, and a locking bolt 22 is installed in the inner thread of the locking screw hole. One end of the locking bolt 22 is in conflict with the side of the vertical slide bar 9. The advantage of this arrangement is that when the locking bolt 22 is rotated, the movable cylinder 21 can be tightened or loosened with the cooperation of the locking screw hole. When the movable cylinder 21 is in a loosened state, the ultrasonic welding head 3 can be slid up and down to adjust its height to adapt to spot welding of workpieces of different thicknesses.

[0033] like Figure 1 and Figure 3 As shown, the intermittent transmission assembly includes an incomplete gear 16 fixedly sleeved on the hexagonal rotating rod 5, a transmission rotating hole is opened on the side of the U-shaped frame 4, a transmission rotating shaft 17 is rotatably installed in the transmission rotating hole, and a transmission gear 18 meshing with the incomplete gear 16 is fixedly installed on one end of the transmission rotating shaft 17, and a continuously variable speed wheel 19 is fixedly sleeved on the transmission rotating shaft 17 and the horizontal screw rod 6, and a transmission belt 20 is commonly adapted and matched on the two continuously variable speed wheels 19. It should be noted that the continuously variable speed wheel 19 and the transmission belt 20 can be any type of belt-type continuously variable transmission in the prior art that can continuously obtain any transmission ratio within the speed range, such as a continuously variable speed regulating wheel with model AK185. The advantage of such an arrangement is that when the hexagonal rotating rod 5 rotates, it will drive the incomplete gear 16 to rotate together. When the incomplete gear 16 rotates to engage with the transmission gear 18, the rotation of the hexagonal rotating rod 5 will drive the horizontal screw 6 to rotate together through the incomplete gear 16, the transmission gear 18, the transmission shaft 17, the continuously variable speed wheel 19 and the transmission belt 20. When the incomplete gear 16 rotates to disengage from the transmission gear 18, the horizontal screw 6 will not rotate with the hexagonal rotating rod 5, thereby achieving the purpose of driving the horizontal screw 6 to rotate intermittently. Moreover, through the coordinated arrangement of the continuously variable speed wheel 19 and the transmission belt 20, the transmission ratio between the hexagonal rotating rod 5 and the horizontal screw 6 can be changed, that is, the number of rotations of the horizontal screw 6 driven by each rotation of the hexagonal rotating rod 5 can be adjusted, so that the device can adapt to spot welding welding points with different spacings, thereby improving the scope of application of the device.

[0034] like Figure 1 and Figure 2 As shown, a guide rod 23 is fixedly mounted on the inner wall of the side of the U-shaped frame 4, and the horizontal moving plate 7 is slidably sleeved on the guide rod 23. The advantage of this arrangement is that, through the matching arrangement of the guide rod 23, the horizontal moving plate 7 can only move horizontally, and will not rotate with the horizontal screw rod 6, thus playing a role of horizontal guidance.

[0035] like Figure 1 , Figure 4 and Figure 6As shown, the adapting and clamping mechanism includes two fixing plates 24 fixedly mounted on the bottom of the processing table 1, and the sides of the two fixing plates 24 close to each other are fixedly mounted with a support plate 25, and the top of the support plate 25 is provided with two screw holes, and the two screw holes are rotatably installed with lifting screws 26, and the top of the processing table 1 is provided with two rectangular sliding holes, and the two rectangular sliding holes are slidably installed with rectangular sliding rods 27, and the two rectangular sliding rods 27 are respectively threadedly sleeved on the two lifting screws 26, and the tops of the two rectangular sliding rods 27 are A connecting sleeve 28 is fixedly installed, and L-shaped slide bars 29 are slidably installed in the two connecting sleeves 28. A pressing plate 30 is fixedly installed at the bottom of the two L-shaped slide bars 29. A fixing unit for fixing the L-shaped slide bars 29 is provided on the connecting sleeve 28. A rotating hole is provided on the side of the two fixing plates 24. A control rotating rod 31 is installed in the two rotating holes for common rotation. A gear transmission unit for driving the two lifting screws 26 to rotate synchronously is connected to the control rotating rod 31. A control knob 32 is fixedly installed at one end of the control rotating rod 31. The advantage of such a setting is that when the control knob 32 is rotated, the control rotating rod 31 will be driven to rotate. The rotation of the control rotating rod 31 will drive the two lifting screws 26 to rotate synchronously through the gear transmission unit. The rotation of the lifting screw 26 will drive the rectangular slide bar 27 to move up and down, and then the pressing plate 30 can be driven to move up and down together through the connecting sleeve 28 and the L-shaped slide bar 29, so that the workpiece is pressed and fixed on the processing table 1, so as to avoid the displacement of the workpiece during spot welding and the deviation of the welding position, and the stability is good during use.

[0036] like Figure 4 As shown, the gear transmission unit includes two first bevel gears 33 fixedly sleeved on the control rotating rod 31, and the bottom ends of the two lifting screws 26 are fixedly mounted with second bevel gears 34, and the two first bevel gears 33 are respectively meshed with the two second bevel gears 34. The advantage of this arrangement is that when the control rotating rod 31 rotates, the two first bevel gears 33 will be driven to rotate, and the rotation of the two first bevel gears 33 will drive the two second bevel gears 34 to rotate together, and then the two lifting screws 26 can be driven to rotate synchronously, which plays a role of synchronous transmission, and the staff no longer needs to rotate the two lifting screws 26 in sequence, which is more convenient to use.

[0037] like Figure 4 and Figure 5As shown, the fixing unit includes an adjusting rod 35, a sliding hole is provided at the top of the connecting sleeve 28, and the adjusting rod 35 is slidably installed in the sliding hole. A plurality of adjusting holes are evenly provided at the top of the L-shaped slide bar 29, and the bottom end of the adjusting rod 35 extends into one of the adjusting holes. An unlocking block 36 is fixedly installed at the top of the adjusting rod 35, and a reset element is installed on the unlocking block 36. The advantage of such a setting is that when the unlocking block 36 is moved up and down, the adjusting rod 35 will be driven to move in or out of the adjusting hole, thereby fixing or loosening the L-shaped slide bar 29. When the L-shaped slide bar 29 is in a loosened state, the L-shaped slide bar 29 can be slid left and right to adjust the position of the pressing plate 30, so as to adapt to the workpieces of different lengths for fixing.

[0038] like Figure 5 As shown, the reset element includes a reset spring 37, and the two ends of the reset spring 37 are respectively fixedly mounted on the top of the connecting sleeve 28 and the bottom of the unlocking pull block 36. The advantage of this arrangement is that when the unlocking pull block 36 is released, the unlocking pull block 36 will be pulled downwards and automatically reset under the elastic force of the reset spring 37, and then the adjustment rod 35 will be automatically inserted into the adjustment hole, and the L-shaped slide bar 29 will be automatically fixed, and the fixed state can be maintained all the time, which is stable and reliable.

[0039] The present invention also discloses a welding method of an ultrasonic welding device, the method comprising:

[0040] S1. Pull the unlocking block 36 upward to release the L-shaped slide bar 29. At this time, the position of the pressing plate 30 can be adjusted until the pressing plate 30 is just above the workpiece. Then release the unlocking block 36 to fix the L-shaped slide bar 29 and the pressing plate 30.

[0041] S2, turn the control knob 32 to drive the pressing plate 30 to move downward by controlling the rotating rod 31, the first bevel gear 33, the second bevel gear 34, the lifting screw 26, the rectangular slide bar 27, the connecting sleeve 28 and the L-shaped slide bar 29 until the workpiece is pressed and fixed on the processing table 1;

[0042] S3. Start the servo motor 8, which will drive the hexagonal rotating rod 5 to rotate. The rotation of the hexagonal rotating rod 5 will drive the ultrasonic welding head 3 to move back and forth up and down. During this process, the rotation of the hexagonal rotating rod 5 will also drive the horizontal screw 6 to rotate intermittently. The intermittent rotation of the horizontal screw 6 will drive the horizontal moving plate 7 and the ultrasonic welding head 3 to move intermittently horizontally, so that the ultrasonic welding head 3 can perform uniform spot welding work by moving back and forth up and down while moving intermittently horizontally, so that spot welding processing can be automatically and evenly performed on multiple points on the workpiece.

[0043] Working principle of the present invention:

[0044] When in use, first pull the unlocking block 36 upward until the adjusting rod 35 moves out of the adjusting hole and the L-shaped slide bar 29 is released. At this time, the L-shaped slide bar 29 can be slid left and right to adjust the position of the pressure plate 30 until the pressure plate 30 is just above the workpiece, and then directly release the unlocking block 36. Under the elastic force of the reset tension spring 37, the unlocking block 36 will be pulled downward to drive the adjusting rod 35 to automatically insert into the adjusting hole, and the L-shaped slide bar 29 will be fixed all the time; then the staff can turn the control knob 32, and the control knob 32 will turn to The control lever 31 is rotated, and the rotation of the control lever 31 will drive the two lifting screws 26 to rotate synchronously through the first bevel gear 33 and the second bevel gear 34. The rotation of the lifting screw 26 will drive the rectangular slide bar 27 to move up and down, and then the pressing plate 30 can be driven to move up and down through the connecting sleeve 28 and the L-shaped slide bar 29 until the pressing plate 30 moves downward to press and fix the workpiece on the processing table 1; then the staff can rotate the locking bolt 22 to loosen the movable cylinder 21, and slide the ultrasonic welding head 3 up and down to adjust its height. After adjusting to the appropriate height, Reversely rotate the locking bolt 22 to move the movable cylinder 21; finally, the servo motor 8 can be directly started. The operation of the servo motor 8 will drive the hexagonal rotating rod 5 to rotate. The rotation of the hexagonal rotating rod 5 will drive the eccentric cam 13 to rotate eccentrically through the movable sleeve 12. At this time, with the cooperation of the extrusion spring 15, the eccentric rotation of the eccentric cam 13 will drive the reciprocating plate 14 to move up and down, and then the ultrasonic welding head 3 can be driven to move up and down through the vertical sliding rod 9 and the mounting plate 10 to perform spot welding. In this process, the rotation of the hexagonal rotating rod 5 will also drive the incomplete gear The wheel 16 and the transmission gear 18 drive the transmission shaft 17 to rotate intermittently. The intermittent rotation of the transmission shaft 17 will drive the horizontal screw 6 to rotate intermittently through the continuously variable wheel 19 and the transmission belt 20. The intermittent rotation of the horizontal screw 6 will drive the horizontal movable plate 7 to move intermittently horizontally, and then the ultrasonic welding head 3 can be driven to move intermittently horizontally through the vertical slide bar 9 and the mounting plate 10, so that the ultrasonic welding head 3 can perform spot welding work reciprocating up and down while moving intermittently horizontally, so that spot welding processing can be automatically and evenly performed on multiple points on the workpiece.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic welding device, comprising a processing table (1), an ultrasonic generator (2) and an ultrasonic welding head (3), characterized in that: The processing table (1) is equipped with a uniform spot welding mechanism and an adaptable pressing mechanism; The uniform spot welding mechanism comprises a U-shaped frame (4) fixedly mounted on the top of the processing table (1), two mounting holes are provided on two sides of the U-shaped frame (4) which are away from each other, wherein hexagonal rotating rods (5) are mounted in two of the mounting holes for common rotation, a servo motor (8) is fixedly arranged on the side of the U-shaped frame (4), the output end of the servo motor (8) is fixedly connected to one end of the hexagonal rotating rod (5), and horizontal screw rods (6) are mounted in the other two mounting holes for common rotation, a horizontal moving plate (7) is threadedly sleeved on the horizontal screw rod (6), the ultrasonic welding head (3) is connected to the horizontal moving plate (7) via a reciprocating drive assembly, and the reciprocating drive assembly is used to make the ultrasonic welding head (3) move reciprocatingly up and down, and the The hexagonal rotating rod (5) is connected to the reciprocating drive assembly, and the hexagonal rotating rod (5) is also connected to an intermittent transmission assembly for intermittently rotating the horizontal screw rod (6). When the servo motor (8) is operated to rotate the hexagonal rotating rod (5), the rotation of the hexagonal rotating rod (5) will drive the ultrasonic welding head (3) to move reciprocally up and down through the reciprocating drive assembly. During this process, the rotation of the hexagonal rotating rod (5) will also drive the horizontal screw rod (6) to rotate intermittently through the intermittent transmission assembly, and then the ultrasonic welding head (3) can be driven to move intermittently horizontally through the horizontal moving plate (7) and the reciprocating drive assembly, so that the ultrasonic welding head (3) can perform uniform reciprocating spot welding while moving intermittently horizontally.

2. An ultrasonic welding device according to claim 1, characterized in that: The reciprocating drive assembly comprises two connecting rods fixedly mounted on the top of the horizontal moving plate (7), the tops of the two connecting rods are fixedly mounted with connecting bearings (11), a movable sleeve (12) is fixedly arranged in the two connecting bearings (11), the movable sleeve (12) is slidably sleeved on the hexagonal rotating rod (5), an eccentric cam (13) is fixedly sleeved on the movable sleeve (12), two vertical sliding holes are provided on the top of the horizontal moving plate (7), and a sliding cam (13) is slidably sleeved in the two vertical sliding holes. A vertical slide bar (9) is installed, and the bottom ends of the two vertical slide bars (9) are commonly connected to a mounting plate (10), and the ultrasonic welding head (3) is fixed on the bottom of the mounting plate (10). The top ends of the two vertical slide bars (9) are commonly fixed with a reciprocating plate (14), and the top of the reciprocating plate (14) is in contact with the circumferential side of the eccentric cam (13). The top of the horizontal plate (7) and the bottom of the reciprocating plate (14) are commonly fixed with a plurality of extrusion springs (15).

3. An ultrasonic welding device according to claim 2, characterized in that: The bottom ends of the two vertical slide bars (9) are slidably sleeved with movable cylinders (21), and the mounting plate (10) is fixedly mounted on the bottom ends of the two movable cylinders (21). The side of the movable cylinder (21) is provided with a locking screw hole, and a locking bolt (22) is threadedly mounted in the locking screw hole, and one end of the locking bolt (22) is in contact with the side of the vertical slide bar (9).

4. The ultrasonic welding device according to claim 1, characterized in that: The intermittent transmission assembly comprises an incomplete gear (16) fixedly sleeved on the hexagonal rotating rod (5); a transmission rotating hole is opened on the side of the U-shaped frame (4); a transmission rotating shaft (17) is rotatably installed in the transmission rotating hole; a transmission gear (18) meshing with the incomplete gear (16) is fixedly installed on one end of the transmission rotating shaft (17); a continuously variable speed wheel (19) is fixedly sleeved on the transmission rotating shaft (17) and the horizontal screw rod (6); and a transmission belt (20) is commonly adapted and arranged on the two continuously variable speed wheels (19).

5. The ultrasonic welding device according to claim 1, characterized in that: A guide rod (23) is fixedly mounted on the inner wall of the side of the U-shaped frame (4), and the horizontal shift plate (7) is slidably sleeved on the guide rod (23).

6. The ultrasonic welding device according to claim 1, characterized in that: The adapting and clamping mechanism comprises two fixing plates (24) fixedly mounted on the bottom of the processing table (1), and a supporting plate (25) is fixedly mounted on the sides of the two fixing plates (24) close to each other, and two screw rotating holes are provided on the top of the supporting plate (25), and a lifting screw (26) is rotatably mounted in the two screw rotating holes, and two rectangular sliding holes are provided on the top of the processing table (1), and rectangular sliding rods (27) are slidably mounted in the two rectangular sliding holes, and the two rectangular sliding rods (27) are respectively threadedly sleeved on the two lifting screws (26), and the top ends of the two rectangular sliding rods (27) are fixedly mounted. A connecting sleeve (28) is provided, and L-shaped slide bars (29) are slidably installed in the two connecting sleeves (28), and a pressure plate (30) is fixedly installed at the bottom ends of the two L-shaped slide bars (29). A fixing unit for fixing the L-shaped slide bars (29) is provided on the connecting sleeve (28), and a rotating hole is opened on the side of the two fixing plates (24). A control rotating rod (31) is rotatably installed in the two rotating holes, and a gear transmission unit for driving the two lifting screws (26) to rotate synchronously is connected to the control rotating rod (31), and a control knob (32) is fixedly installed on one end of the control rotating rod (31).

7. An ultrasonic welding device according to claim 6, characterized in that: The gear transmission unit comprises two first bevel gears (33) fixedly sleeved on the control rotating rod (31), and the bottom ends of the two lifting screw rods (26) are fixedly mounted with second bevel gears (34), and the two first bevel gears (33) are respectively meshed with the two second bevel gears (34).

8. An ultrasonic welding device according to claim 6, characterized in that: The fixing unit comprises an adjusting rod (35), a sliding hole is provided at the top of the connecting sleeve (28), the adjusting rod (35) is slidably installed in the sliding hole, a plurality of adjusting holes are evenly provided at the top of the L-shaped sliding rod (29), the bottom end of the adjusting rod (35) extends into one of the adjusting holes, an unlocking block (36) is fixedly installed at the top end of the adjusting rod (35), and a reset element is installed on the unlocking block (36).

9. An ultrasonic welding device according to claim 8, characterized in that: The reset element comprises a reset tension spring (37), and two ends of the reset tension spring (37) are respectively fixedly mounted on the top of the connecting sleeve (28) and the bottom of the unlocking pull block (36).

10. A welding method according to any one of claims 1 to 9, characterized in that: The method includes: S1. Pull the unlocking block (36) upward to release the L-shaped slide bar (29). At this time, the position of the pressing plate (30) can be adjusted until the pressing plate (30) is just above the workpiece. Then, release the unlocking block (36) to fix the L-shaped slide bar (29) and the pressing plate (30). S2, turning the control knob (32), and driving the pressing plate (30) to move downward by controlling the rotating rod (31), the first bevel gear (33), the second bevel gear (34), the lifting screw (26), the rectangular slide bar (27), the connecting sleeve (28) and the L-shaped slide bar (29), until the workpiece is pressed and fixed on the processing table (1); S3, starting the servo motor (8) will drive the hexagonal rotating rod (5) to rotate, and the rotation of the hexagonal rotating rod (5) will drive the ultrasonic welding head (3) to move back and forth up and down. During this process, the rotation of the hexagonal rotating rod (5) will also drive the horizontal screw (6) to rotate intermittently, and the intermittent rotation of the horizontal screw (6) will drive the horizontal moving plate (7) and the ultrasonic welding head (3) to move intermittently horizontally, so that the ultrasonic welding head (3) can perform uniform spot welding work while moving intermittently horizontally, so that spot welding processing can be automatically and evenly performed on multiple points on the workpiece.

Images