Ultrasonic high-speed welding equipment and welding method

Abstract

The invention discloses ultrasonic high-speed welding equipment and a welding method.The equipment comprises a rack, an electric control mechanism, an executing mechanism and a monitoring mechanism, and the executing mechanism comprises a first lifting assembly, a linear driving part, a welding executing assembly and a second lifting assembly; the linear driving piece is used for generating pressure for pressing the welding execution assembly on the to-be-welded piece, and the welding execution assembly is used for providing high-frequency vibration to achieve ultrasonic welding; the monitoring mechanism is used for monitoring the pressure of the linear driving part on the welding execution assembly, the pressure of the second lifting assembly on the bottom die, the real-time position of the welding execution assembly and the real-time position of the bottom die. The electric control mechanism is used for controlling the execution mechanism to operate according to a preset program and monitoring data obtained from the monitoring mechanism. According to the scheme, the welding efficiency can be improved, and pseudo soldering is reduced.

Description

Technical Field

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

[0002] Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, these waves cause friction between the two surfaces, creating a fusion of molecular layers. It is widely used in metal welding, particularly in the automotive, electronics, and medical device industries.

[0003] Existing ultrasonic welding equipment typically features a stationary base, with the welding head driven downward by a pneumatic cylinder, which presses the welding head into contact with the material placed on the base before welding. To improve cycle efficiency, other existing solutions replace the driving cylinder with a servo motor, or use a motor and pneumatic cylinder to move downward in stages to increase drive speed. Alternatively, the welding head and base can be moved in both directions, further shortening the movement time and improving efficiency.

[0004] If a purely servo-driven welding head is used, the servo's torque mode must be used to control the pressure of the welding head on the material to ensure weld quality. Therefore, the servo must first use position mode to drive the welding head over a large stroke, reaching the first position point, leaving only a small gap between the welding head and the material. The servo then switches to torque mode to drive the welding head downward, finally contacting the workpiece for welding. This involves a process in which the welding head decelerates, stops, and reaches the first position point, then switches to servo mode and accelerates again. This results in a lower efficiency improvement than the original cylinder-driven welding head, which moves directly into position all at once.

[0005] If a servo-assisted pneumatic cylinder is used for segmented motion, the servo first drives the welding head through a large stroke, then the pneumatic cylinder drives the welding head through a smaller stroke. The cylinder, fed by a stable air pressure input, provides stable welding force. However, this approach involves multiple stages of signal acquisition, interaction, feedback, and judgment, resulting in a relatively low efficiency improvement. Summary of the Invention

[0006] In order to solve the above problems, the present application provides an ultrasonic high-speed welding device and a welding method.

[0007] In a first aspect, an embodiment of the present application provides an ultrasonic high-speed welding device, comprising a frame, an electric control mechanism, an actuator, and a monitoring mechanism, wherein the electric control mechanism is signal-connected to the actuator and the monitoring mechanism; The actuator includes a first lifting assembly, a linear drive component, a welding actuator assembly and a second lifting assembly, wherein: The first lifting assembly is used to drive the welding execution assembly to move in a first direction; A bottom mold for supporting a workpiece to be welded is connected to the second lifting assembly, and the second lifting assembly is used to drive the bottom mold to move in the first direction; The cylinder block of the linear drive is connected to the first lifting assembly, and the telescopic rod of the linear drive is connected to the welding execution assembly. Alternatively, the cylinder block of the linear drive is connected to the second lifting assembly, and the telescopic rod of the linear drive is connected to the bottom mold; When welding is performed, the linear drive is used to generate a pressure for pressing the welding execution assembly and the workpiece to be welded, and the welding execution assembly is used to provide high-frequency vibration to achieve ultrasonic welding; The monitoring mechanism is used to monitor the pressure generated by the linear drive, the pressure on the bottom mold from top to bottom, the real-time position of the welding execution assembly, and the real-time position of the bottom mold; The electric control mechanism is used to control the operation of the execution mechanism according to a preset program and the monitoring data obtained from the monitoring mechanism.

[0008] In some embodiments, the first lifting assembly includes a first drive, a first transmission member, and a first guiding member. One end of the first transmission member is connected to the output end of the first drive, and the other end is connected to a first mounting plate. The first guiding member is arranged along the first direction, and the first mounting plate slides on the first guiding member; When the cylinder block of the linear drive is connected to the first lifting assembly, the cylinder block of the linear drive is connected to the first mounting plate; When the cylinder block of the linear drive is connected to the second lifting assembly, the first mounting plate is used to mount the welding execution assembly.

[0009] In some embodiments, the welding execution assembly includes a transducer, a coupling rod, and a welding head, and the transducer and the welding head are respectively connected to the coupling rod; When the cylinder block of the linear drive is connected to the first mounting plate, a second mounting plate also slides on the first guiding member, and the coupling rod is mounted on the second mounting plate and connected to the linear drive; When the cylinder block of the linear drive is connected to the second lifting assembly, the coupling rod is mounted on the first mounting plate.

[0010] In some embodiments, the second lifting assembly includes a second drive and a second guiding member arranged along the first direction, and a third mounting plate slides on the second guiding member; When the cylinder block of the linear drive is connected to the first lifting assembly, the bottom mold is connected to the output end of the second drive and mounted on the third mounting plate; When the cylinder block of the linear drive is connected to the second lifting assembly, the cylinder block of the linear drive is connected to the third mounting plate, and the bottom die is connected to the telescopic rod of the linear drive.

[0011] In some embodiments, the output F2 of the first lifting assembly is greater than the output F3 of the linear drive and less than the output F5 of the second lifting assembly.

[0012] In some embodiments, the output F2 of the first lifting assembly and the output F3 of the linear drive satisfy the following relationship: F2 = (1.1~2)*F3; The output F5 of the second lifting assembly and the output F3 of the linear drive satisfy the following relationship: F5 = (2~5)*F3.

[0013] In some embodiments, the monitoring mechanism includes: A first pressure sensor for monitoring the pressure generated by the linear drive; A second pressure sensor for monitoring the pressure exerted on the bottom die from top to bottom; A first position monitoring member for detecting the real-time position of the welding head; A second position monitoring member for monitoring the real-time position of the bottom die.

[0014] In some embodiments, the monitoring mechanism further includes a first photoelectric induction sheet, a first photoelectric sensor group, a second photoelectric induction sheet, and a second photoelectric sensor group; The first photoelectric induction sheet is installed on the first mounting plate, and the first photoelectric sensor group is installed on the frame for indicating the limit stroke position of the first lifting assembly. When the first photoelectric sensor group senses the first photoelectric induction sheet, the operation of the first lifting assembly is stopped through the electric control mechanism; The second photoelectric induction sheet is installed on the third mounting plate, and the second photoelectric sensor group is installed on the frame for indicating the limit stroke position of the second lifting assembly. When the second photoelectric sensor group senses the second photoelectric induction sheet, the operation of the second lifting assembly is stopped through the electric control mechanism.

[0015] In a second aspect, an ultrasonic welding method provided by an embodiment of the present application includes: After the workpiece to be welded is placed at the welding position of the ultrasonic high-speed welding equipment, control the second lifting assembly to move from the waiting position to the welding position. Wherein, when the second lifting assembly is at the waiting position, there is a gap between the bottom die and the workpiece to be welded, and when the second lifting assembly is at the welding position, the bottom die contacts and supports the workpiece to be welded; After detecting that the bottom mold moves to the welding position, control the first lifting assembly to move from the first preset position to the second preset position. Among them, when the first lifting assembly is at the first preset position, there is a gap between the welding head and the workpiece to be welded. When the first lifting assembly is at the second preset position, the welding head abuts against the workpiece to be welded, and the telescopic rod of the linear drive member retracts a first distance; Obtain the first pressure, the second pressure and the current welding head position data fed back by the monitoring mechanism. The first pressure is the pressure received by the welding head, and the second pressure is the pressure received by the bottom mold; After the first pressure, the second pressure and the current welding head position data all meet the preset conditions, control the linear drive member and the welding execution assembly to operate according to a preset program to execute the welding task; After receiving the welding completion signal, control the first lifting assembly to return to the first preset position, and control the lower lifting mechanism to return to the waiting position.

[0016] In some embodiments, the range of the first distance is 0.2 - 5 mm.

[0017] In some embodiments, after welding is completed, the welding head moves a second distance in the direction of the workpiece to be welded. The first distance is greater than the second distance, and the difference range between the first distance and the second distance is 0.5 - 2 mm.

[0018] In some embodiments, after receiving the welding completion signal, controlling the first lifting assembly to return to the first preset position and controlling the lower lifting mechanism to return to the waiting position includes: After receiving the welding completion signal, control the first lifting assembly to move towards the first preset position until the first lifting assembly reaches the first preset position. During this process, continuously obtain the first pressure fed back by the monitoring mechanism; When the first pressure is zero, control the lower lifting mechanism to return to the waiting position.

[0019] The technical solution of this application has at least the following advantages: 1. By setting the first lifting assembly, the linear drive member, the welding execution assembly and the second lifting assembly, when welding is required, the welding execution assembly can directly move into place under the drive of the first lifting assembly without secondary positioning; at the same time, due to the setting of the linear drive member, a stable pressure towards the workpiece to be welded can be continuously applied to the welding head during welding, reducing the possibility of false soldering; 2. By collecting and utilizing data such as the first pressure, the second pressure, and the real-time position of the welding head, the state of the welding head that triggers welding can be efficiently and accurately judged, reducing the redundant waiting time of the process. Description of the Drawings

[0020] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 FIG. is a schematic structural diagram of an ultrasonic high-speed welding device provided by an exemplary embodiment of the present application; Figure 2 FIG. is a schematic structural diagram of the ultrasonic high-speed welding device provided by an exemplary embodiment of the present application from another angle; Figure 3 FIG. is a flowchart of an ultrasonic welding method provided by an exemplary embodiment of the present application; Figures 4-1 to 4-5 FIG. is a schematic diagram for reflecting the state of the ultrasonic high-speed welding device during the implementation process of the ultrasonic welding method provided by an exemplary embodiment of the present application.

[0022] Description of reference numerals: 1. Frame; 2. First lifting assembly; 21. First driving member; 22. First transmission member; 23. First guiding member; 3. Linear driving member; 4. Welding execution assembly; 41. Transducer; 42. Coupling rod; 43. Welding head; 5. Second lifting assembly; 51. Second driving member; 52. Second guiding member; 6. Bottom mold; 71. First mounting plate; 72. Second mounting plate; 73. Third mounting plate; 81. First pressure sensor; 82. Second pressure sensor; 83. First position monitoring member; 84. Second position monitoring member; 85. First photoelectric induction sheet; 86. First photoelectric sensor group; 87. Second photoelectric induction sheet; 88. Second photoelectric sensor group. Specific embodiments

[0023] The following will clearly and completely describe the technical solutions in the present application in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0025] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0026] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] The present application provides an ultrasonic high-speed welding device. Referring to Figure 1 and Figure 2 , it includes a frame 1, an electric control mechanism, an execution mechanism, and a monitoring mechanism. The execution mechanism includes a first lifting assembly 2, a linear driving member 3, a welding execution assembly 4, and a second lifting assembly 5. Among them, the first lifting assembly 2 is used to drive the welding execution assembly 4 to move in the first direction. A bottom mold 6 for supporting the workpiece to be welded is connected to the second lifting assembly 5, and the second lifting assembly 5 is used to drive the bottom mold 6 to move in the first direction. When welding operations are required, the welding execution assembly 4 can be moved into place at one time through the first lifting assembly 2 without secondary positioning. The linear driving member 3 can be an electric cylinder, a cylinder, etc., and is used to generate a pressure to press the welding execution assembly 4 and the workpiece to be welded. The cylinder body of the linear driving member 3 can be connected to the first lifting assembly 2 or the second lifting assembly 3. In this embodiment and the drawings, it is described by taking its connection to the first lifting assembly 2 as an example.

[0028] As Figure 1 and Figure 2As shown, the welding execution assembly 4 is connected to the telescopic rod of the linear drive 3. When welding is performed, the linear drive 3 is used to generate a pressure that presses the welding execution assembly 4 against the workpiece to be welded, and the welding execution assembly 4 is used to provide high-frequency vibration to achieve ultrasonic welding. At the same time, the monitoring mechanism is used to monitor parameters such as the pressure of the linear drive 3 on the welding execution assembly 4, the pressure on the bottom die 6 from top to bottom, the real-time position of the welding execution assembly 4, and the real-time position of the bottom die 6. The electric control mechanism is signal-connected to the execution mechanism and the monitoring mechanism, and is used to control the operation of the execution mechanism according to the preset program and the monitoring data obtained from the monitoring mechanism, so as to complete the welding.

[0029] Further, referring to Figure 1 and Figure 2 , the first lifting assembly 2 includes a first driving member 21, a first transmission member 22, and a first guiding member 23. Among them, the first driving member 21 and the first transmission member 22 are arranged in a matching manner. In this embodiment, the first driving member 21 can be a servo motor. Correspondingly, the first transmission member 22 can be a lead screw. As Figure 1 shown, for the selection of the lead screw, it can be selected according to production requirements. For example, a lead screw with a stroke of 65 mm, a lead of 5 mm, and a diameter of 20 mm can be used. In other embodiments, the first transmission member 22 can also be a combination of a cam and a cam follower, which will not be elaborated in this application.

[0030] Referring to Figure 1 and Figure 2 , one end of the first transmission member 22 is connected to the output end of the first driving member 21, and the other end is connected to a first mounting plate 71. The first guiding member 23 can be set as a linear guide rail and is fixedly installed on the frame 1. Among them, the width of the linear guide rail can be 25 mm. The first guiding member 23 is arranged along the first direction (i.e., the vertical direction), and the first mounting plate 71 is slidably installed on the first guiding member 23. When the first driving member 21 operates, it can drive the first mounting plate 71 to move in the vertical direction. During this process, the first guiding member 23 can improve the stability of the moving process.

[0031] In this embodiment, referring to Figure 1 and Figure 2 , the linear drive 3 uses a cylinder, and the cylinder body of the linear drive 3 is fixedly connected to the first mounting plate 71 by bolts. The telescopic rod of the linear drive 3 is arranged vertically downward, and the linear drive 3 can be configured with mechanisms such as an electro-hydraulic proportional valve to achieve pressure control. Since the linear drive 3 does not need to drive the welding execution assembly 4 to move, only provide pressure for it. Therefore, the telescopic rod of the linear drive 3 can always be in the extended state. To save costs, the linear drive 3 can not be configured with a solenoid valve for air intake commutation. In addition, the air intake end of the linear drive 3 can use a quick exhaust throttle valve, and the exhaust end can use a muffler.

[0032] Referring to Figure 1 and Figure 2 ,the welding execution assembly 4 includes a transducer 41, a coupling rod 42 and a welding head 43. The transducer 41 is connected to the coupling rod 42. One end of the coupling rod 42 is fixedly connected to the telescopic rod of the linear drive 3, and the other end is fixedly connected to the welding head 43. A second mounting plate 72 is slidably connected to the first guide 23, and the coupling rod 42 is mounted on the second mounting plate 72 by bolts. When the first drive 21 operates, it will drive the linear drive 3 to displace in the first direction through the first mounting plate 71, and then drive the welding head 43 to displace in the first direction. In addition, since the telescopic rod of the linear drive 3 and the coupling rod 42 in the welding execution assembly 4 are coaxially arranged, when the linear drive 3 applies pressure to the welding execution assembly 4, additional tilting moments can be avoided.

[0033] Referring to Figure 1 and Figure 2 ,the second lifting assembly 5 includes a second drive 51 and a second guide 52 arranged along the first direction. Among them, in this embodiment, the second drive 51 uses a cylinder, the second guide 52 uses a linear guide rail, and a third mounting plate 73 slides on the second guide 52. The bottom die 6 is fixedly connected to the output end of the second drive 51 and mounted on the third mounting plate 73. When the second drive 51 operates, it will drive the bottom die 6 to move along the second guide 52 in the first direction. In addition, since the second drive 51 is configured as a cylinder, in order to prevent its telescopic rod from retracting due to impact, a pair of guide rail calipers can be added to the third mounting plate 73. By inputting air pressure into the guide rail calipers, the internal blocks of the calipers can be extended and abutted against both sides of the second guide 52, so as to lock the second drive 51 by using friction.

[0034] Furthermore, in order to prevent the first lifting assembly, the linear drive and the second lifting assembly from being damaged, the output F2 of the first lifting assembly 2 is greater than the output F3 of the linear drive 3 and less than the output F5 of the second lifting assembly 5. Among them, the above outputs F2, F3 and F5 are all forces in the vertical direction.

[0035] Furthermore, the output F2 of the first lifting assembly 2 and the output F3 of the linear drive 3 satisfy the following relationship: F2 = (1.1~2) * F3; the output F5 of the second lifting assembly 5 and the output F3 of the linear drive 3 satisfy the following relationship: F5 = (2~5) * F3.

[0036] In another embodiment, the cylinder block of the linear drive 3 can be connected to the second lifting assembly 5, and the welding execution assembly 4 is directly connected to the first lifting assembly 2. At this time, if the structures of the first lifting assembly 2 and the second lifting assembly 5 are still the same as those in the above embodiment, the cylinder block of the linear drive 3 can be installed on the third mounting plate 73, and the telescopic rod of the linear drive 3 is connected to the lower surface of the bottom die 6. At the same time, the coupling rod 42 in the welding execution assembly 4 is directly installed on the first mounting plate 71.

[0037] In other embodiments, the specific configurations of the first lifting assembly 2 and the second lifting assembly 5 can also be interchanged or adjusted. For example, the second drive 51 can also be configured as a combination of a servo motor and a cam. At this time, the second lifting assembly 5 further includes a second transmission member, and the second transmission member is configured as a cam follower. Alternatively, the second drive 51 can also be configured to use a servo motor, and the second transmission member can be configured as a lead screw. The specific configuration method is similar to that of the first lifting assembly, and will not be elaborated in this application.

[0038] In another alternative embodiment, a linear drive 3 can also be configured in both the first lifting assembly 2 and the second lifting assembly 5.

[0039] In this embodiment, in order to implement the monitoring function, referring to Figure 1 and Figure 2 , in this embodiment, the monitoring mechanism includes a first pressure sensor 81, a second pressure sensor 82, a first position monitoring member 83, and a second position monitoring member 84. Among them, the first pressure sensor 81 is installed between the telescopic rod of the linear drive 3 and the coupling rod 42 for monitoring the magnitude of the pressure exerted by the linear drive 3 on the welding execution assembly 4. The second pressure sensor 82 is installed between the output end of the second drive 51 and the bottom die 6 for monitoring the magnitude of the pressure received by the bottom die 6. In other embodiments, when a second linear drive is configured, the second pressure sensor 82 will be installed between the telescopic rod of the second linear drive and the bottom die 6.

[0040] The first position monitoring member 83 and the second position monitoring member 84 can be configured as grating scales, magnetic grating scales, etc. In this application, both use grating scales. As Figure 2 shown, the scale grating of the first position monitoring member 83 is installed on the frame 1, and the reading head is connected to the second mounting plate 72, so as to detect the real-time position of the welding head 43. The scale grating of the second position monitoring member 84 is installed on the frame 1, and the reading head is connected to the third mounting plate 73, so as to monitor the real-time position of the bottom die 6.

[0041] In other embodiments, the positions of the first pressure sensor 81 and the second pressure sensor can be adjusted adaptively to implement their monitoring functions.

[0042] Further, the monitoring mechanism may further include a first photoelectric induction sheet 85, a first photoelectric sensor group 86, a second photoelectric induction sheet 87, and a second photoelectric sensor group 88. Among them, the first photoelectric induction sheet 85 is fixedly installed on the first mounting plate 71. The first photoelectric sensor group 86 includes two photoelectric sensors installed on the frame 1, and the two photoelectric sensors are respectively used to indicate the limit stroke positions of the first driving member 21. When any one of the photoelectric sensors in the first photoelectric sensor group 86 senses the first photoelectric induction sheet 85, a corresponding signal will be sent to the electric control mechanism, causing the electric control mechanism to stop the operation of the first driving member 21 in the first lifting assembly 2.

[0043] The second photoelectric induction sheet 87 is fixedly installed on the third mounting plate 73. The second photoelectric sensor group includes two photoelectric sensors installed on the frame 1, and the two photoelectric sensors are respectively used to indicate the limit stroke positions of the third driving member. When any one of the photoelectric sensors in the second photoelectric sensor group senses the second photoelectric induction sheet 87, a corresponding signal will be sent to the electric control mechanism, causing the electric control mechanism to stop the operation of the third driving member in the second lifting assembly 5.

[0044] The ultrasonic high-speed welding equipment provided by the embodiment of the present application, by setting the first lifting assembly 2, the linear driving member 3, the welding execution assembly 4, and the second lifting assembly 5, when welding is required, the welding head 43 in the welding execution assembly 4 can directly move into place under the drive of the first lifting assembly 2 without secondary positioning; at the same time, due to the setting of the linear driving member 3, a stable pressure towards the workpiece to be welded can be always applied to the welding head 43 during the welding process, reducing the possibility of false welding.

[0045] Based on the above ultrasonic high-speed welding equipment, the embodiment of the present application further provides an ultrasonic welding method. Refer to Figure 3 and the method includes the following processing procedures: S1: After the workpiece to be welded is placed at the welding position of the ultrasonic high-speed welding equipment, control the second lifting assembly to move from the waiting position to the welding position.

[0046] Among them, refer to Figure 4-1 For the convenience of description, the height of the end of the telescopic rod of the second driving member connected to the bottom mold is defined as the position where the second lifting assembly is located.

[0047] Exemplarily, the welding position is between the welding head and the bottom die. Before welding starts, the workpiece to be welded can be manually placed by the operator at the welding position of the ultrasonic high-speed welding equipment, or the fixture with the workpiece to be welded can be transported to the welding position by a conveyor belt. After that, the operation of the electric control mechanism can be triggered manually by the operator, or automatically triggered by a sensor set at the welding position. Initially, the second lifting assembly is at the waiting position. At this time, there is a spacing between the bottom die and the workpiece to be welded in the first direction. Generally speaking, this spacing can be 5 - 10 mm. When the electric control mechanism starts to operate, it will control the telescopic rod of the second driving part to extend, thereby driving the bottom die to rise by a fixed distance, so that the bottom die contacts and supports the workpiece to be welded. At this time, the second lifting assembly is at the welding position, as Figure 4-2 shown.

[0048] S2: After monitoring that the bottom die moves to the welding position, control the first lifting assembly to move from the first preset position to the second preset position.

[0049] Wherein, for the convenience of description, referring to Figure 4-1 , the height of the upper surface of the first mounting plate is defined as the position where the first lifting assembly is located.

[0050] Exemplarily, before this step starts, the first lifting assembly is at the first preset position, as Figure 4-2 shown. At this time, there is a spacing between the welding head and the workpiece to be welded in the first direction. After that, when it is monitored by the second position monitoring part that the bottom die moves to the welding position, the electric control mechanism will control the first driving part in the first lifting assembly to operate, so that the first transmission part drives the first mounting plate to descend by a preset distance until the first lifting assembly reaches the second preset position. During this process, referring to Figure 4-3 , the first lifting assembly will first pass through an intermediate position. At this time, the welding head just abuts against the workpiece to be welded, and the pressure between the two is 0. At the same time, through pre-design, the upward pressure received by the workpiece to be welded is made greater than the downward pressure received. Generally speaking, due to the impact force and self-weight when the upper lifting mechanism descends, the upward pressure is set to be 1.5 - 3 times the downward pressure. Therefore, as the first driving part continues to operate, the cylinder body of the linear driving part will continue to displace downward, while the telescopic rod of the linear driving part remains stationary due to the limitation of the workpiece to be welded. Thus, when the first lifting assembly reaches the second preset position, the telescopic rod of the linear driving part will retract by a first distance (i.e., Figure 4-4 D1 in

[0051] Furthermore, the maximum stroke of the linear driving part can be set to 10 - 30 mm, and the above-mentioned first distance is set to 0.2 - 5 mm.

[0052] S3: Obtain the first pressure, second pressure and current welding head position data fed back by the monitoring mechanism.

[0053] Among them, the first pressure is the pressure received by the welding head in real-time feedback from the first pressure sensor, and the second pressure is the pressure received by the bottom die in real-time feedback from the second pressure sensor. The first position monitoring component will feedback the current welding head position data in real-time.

[0054] S4; After the first pressure, the second pressure, and the current welding head position data all meet the preset conditions, control the linear driving component and the welding execution component to operate according to the preset program to execute the welding task.

[0055] Exemplarily, when the electric control mechanism recognizes that the first pressure, the second pressure, and the current welding head position data all meet the preset conditions, for example, when they are all within the corresponding preset intervals, it will control the linear driving component and the welding execution component to operate according to the preset program to execute the welding task.

[0056] S5: After receiving the welding completion signal, control the first lifting component to return to the first preset position, and control the lower lifting mechanism to return to the waiting position.

[0057] Exemplarily, after welding is completed, the welding execution component will feedback the welding completion signal. After the electric control mechanism receives the welding completion signal, it will control the first lifting component to rise and return to the first preset position, and control the lower lifting mechanism to descend and return to the waiting position.

[0058] Furthermore, after welding is completed, since the workpieces to be welded are tightly compressed and welded into one body, and the telescopic rod of the linear driving component is in a retracted state, therefore, as Figure 4-5 shown, the welding head will move a second distance (i.e., D2 in Figure 4-5 ) towards the workpieces to be welded. Among them, the second distance is less than the first distance mentioned above. Generally speaking, the difference range between the first distance and the second distance is 0.5 - 2 mm.

[0059] Furthermore, in order to further improve the efficiency, S5 mentioned above can be as follows: S51: After receiving the welding completion signal, control the first lifting component to move towards the first preset position until the first lifting component reaches the first preset position. During this process, the first pressure feedback from the monitoring mechanism is obtained in real-time.

[0060] Exemplarily, after receiving the welding completion signal, the electric control mechanism will first control the first lifting component to move towards the first preset position. During this process, the first pressure feedback from the monitoring mechanism will be obtained in real-time.

[0061] S52: When the first pressure is zero, control the lower lifting mechanism to return to the waiting position.

[0062] Exemplarily, when the first pressure is zero, it means that the welding head has just left the workpiece to be welded. At this time, the electronic control mechanism immediately controls the lower lifting mechanism to descend and return to the waiting position without damaging the workpiece to be welded that has completed welding.

[0063] Further, in other embodiments, in order to improve efficiency, the telescopic rod of the linear drive in the ultrasonic high-speed welding equipment can also be set to be telescopically switchable. Thus, in the above S5, when controlling the first lifting assembly to return to the first preset position, the telescopic rod of the linear drive is simultaneously controlled to retract.

[0064] On the one hand, the ultrasonic welding method provided by the embodiments of the present application can efficiently and accurately judge the state of the welding head triggering welding by collecting and utilizing data such as the first pressure, the second pressure, and the real-time position of the welding head, reducing the redundant waiting time in the process.

[0065] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An ultrasonic high-speed welding device, characterized in that, It includes a frame (1), an electric control mechanism, an actuator, and a monitoring mechanism. The electric control mechanism is signal-connected to the actuator and the monitoring mechanism; The actuator includes a first lifting assembly (2), a linear drive (3), a welding execution assembly (4), and a second lifting assembly (5), where: The first lifting assembly (2) is used to drive the welding execution assembly (4) to move in a first direction; A bottom mold (6) for supporting the workpiece to be welded is connected to the second lifting assembly (5), and the second lifting assembly (5) is used to drive the bottom mold (6) to move in the first direction; The cylinder body of the linear drive (3) is connected to the first lifting assembly (2), and the telescopic rod of the linear drive (3) is connected to the welding execution assembly (4). Alternatively, the cylinder body of the linear drive (3) is connected to the second lifting assembly (5), and the telescopic rod of the linear drive (3) is connected to the bottom mold (6); When welding is performed, the linear drive (3) is used to generate a pressure to press the welding execution assembly (4) and the workpiece to be welded, and the welding execution assembly (4) is used to provide high-frequency vibration to achieve ultrasonic welding; The monitoring mechanism is used to monitor the pressure generated by the linear drive (3), the pressure received by the bottom mold (6) from top to bottom, the real-time position of the welding execution assembly (4), and the real-time position of the bottom mold (6); The electric control mechanism is used to control the operation of the actuator according to a preset program and the monitoring data obtained from the monitoring mechanism.

2. The ultrasonic high-speed welding equipment according to claim 1, characterized in that The first lifting assembly (2) includes a first driver (21), a first transmission member (22), and a first guide member (23). One end of the first transmission member (22) is connected to the output end of the first driver (21), and the other end is connected to a first mounting plate (71). The first guide member (23) is arranged along the first direction, and the first mounting plate (71) slides on the first guide member (23); When the cylinder body of the linear drive (3) is connected to the first lifting assembly (2), the cylinder body of the linear drive (3) is connected to the first mounting plate (71); When the cylinder body of the linear drive (3) is connected to the second lifting assembly (5), the first mounting plate (71) is used to mount the welding execution assembly (4).

3. The ultrasonic high-speed welding device according to claim 2, characterized in that, The welding execution assembly (4) includes a transducer (41), a coupling rod (42), and a welding head (43). The transducer (41) and the welding head (43) are respectively connected to the coupling rod (42); When the cylinder body of the linear drive (3) is connected to the first mounting plate (71), a second mounting plate (72) also slides on the first guide member (23). The coupling rod (42) is mounted on the second mounting plate (72) and connected to the linear drive (3); When the cylinder body of the linear drive (3) is connected to the second lifting assembly (5), the coupling rod (42) is mounted on the first mounting plate (71).

4. The ultrasonic high-speed welding equipment according to claim 1, characterized in that, The second lifting assembly (5) includes a second driving member (51) and a second guiding member (52) arranged in the first direction. A third mounting plate (73) slides on the second guiding member (52); When the cylinder block of the linear driving member (3) is connected to the first lifting assembly (2), the bottom die (6) is connected to the output end of the second driving member (51) and mounted on the third mounting plate (73); When the cylinder block of the linear driving member (3) is connected to the second lifting assembly (2), the cylinder block of the linear driving member (3) is connected to the third mounting plate (73), and the bottom die (6) is connected to the telescopic rod of the linear driving member (3).

5. The ultrasonic high-speed welding device according to claim 1, characterized in that, The output F2 of the first lifting assembly (2) is greater than the output F3 of the linear driving member (3) and less than the output F5 of the second lifting assembly (5).

6. The ultrasonic high-speed welding equipment according to claim 1, wherein, The output F2 of the first lifting assembly (2) and the output F3 of the linear driving member (3) satisfy the following relationship; F2 = (1.1~2)*F3; The output F5 of the second lifting assembly (5) and the output F3 of the linear driving member (3) satisfy the following relationship: F5 = (2~5)*F3.

7. The ultrasonic high-speed welding equipment according to claim 3, characterized in that, The monitoring mechanism includes: A first pressure sensor (81) for monitoring the pressure generated by the linear driving member (3); A second pressure sensor (82) for monitoring the pressure exerted on the bottom die (6) from top to bottom; A first position monitoring member (83) for detecting the real-time position of the welding head (43); A second position monitoring member (84) for monitoring the real-time position of the bottom die (6).

8. The ultrasonic high-speed welding equipment according to claim 1, characterized in that, The monitoring mechanism further includes a first photoelectric induction sheet (85), a first photoelectric sensor group (86), a second photoelectric induction sheet (87) and a second photoelectric sensor group (88); The first photoelectric induction sheet (85) is mounted on the first mounting plate (71), and the first photoelectric sensor group (86) is mounted on the frame (1) to indicate the limit stroke position of the first lifting assembly (2). When the first photoelectric sensor group (86) senses the first photoelectric induction sheet (85), the operation of the first lifting assembly (2) is stopped through the electric control mechanism; The second photoelectric induction sheet (87) is mounted on the third mounting plate (73), and the second photoelectric sensor group is mounted on the frame (1) to indicate the limit stroke position of the second lifting assembly (5). When the second photoelectric sensor group (88) senses the second photoelectric induction sheet (87), the operation of the second lifting assembly (5) is stopped through the electric control mechanism.

9. An ultrasonic welding method, characterized in that, Including: After the workpiece to be welded is placed at the welding position of the ultrasonic high-speed welding equipment, control the second lifting assembly to move from the waiting position to the welding position. Wherein, when the second lifting assembly is at the waiting position, there is a spacing between the bottom die and the workpiece to be welded, and when the second lifting assembly is at the welding position, the bottom die contacts and supports the workpiece to be welded; After detecting that the bottom mold moves to the welding position, control the first lifting component to move from the first preset position to the second preset position. Among them, when the first lifting component is at the first preset position, there is a distance between the welding head and the workpiece to be welded. When the first lifting component is at the second preset position, the welding head abuts against the workpiece to be welded, and the telescopic rod of the linear driving component retracts a first distance; Obtain the first pressure, the second pressure and the current welding head position data fed back by the monitoring mechanism. The first pressure is the pressure received by the welding head, and the second pressure is the pressure received by the bottom mold; After the first pressure, the second pressure and the current welding head position data all meet the preset conditions, control the linear driving component and the welding execution component to operate according to the preset program to execute the welding task; After receiving the welding completion signal, control the first lifting component to return to the first preset position, and control the lower lifting mechanism to return to the waiting position.

10. The ultrasonic welding method according to claim 9, characterized in that the range of the first distance is 0.2-5 mm.

11. The ultrasonic welding method according to claim 10, characterized in that after welding is completed, the welding head moves a second distance in the direction of the workpiece to be welded. The first distance is greater than the second distance, and the difference range between the first distance and the second distance is 0.5-2 mm.

12. The ultrasonic welding method according to claim 9, characterized in that after receiving the welding completion signal, controlling the first lifting component to return to the first preset position and controlling the lower lifting mechanism to return to the waiting position includes: After receiving the welding completion signal, control the first lifting component to move towards the first preset position until the first lifting component reaches the first preset position. During this process, continuously obtain the first pressure fed back by the monitoring mechanism; When the first pressure is zero, control the lower lifting mechanism to return to the waiting position.

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