Control method and equipment of ultrasonic welding power source, medium and product

Abstract

The embodiment of the invention relates to the technical field of ultrasonic waves, and discloses a control method and equipment for an ultrasonic welding power source, a medium and a product. The method comprises the steps that after the welding preparation action is completed, a welding head is subjected to pressure treatment, rapid frequency sweeping is conducted, and a frequency sweeping curve is obtained; obtaining a phase difference range according to the sweep frequency curve, and obtaining a maximum value and a minimum value of the phase difference; calculating a target phase difference according to the maximum value and the minimum value of the phase difference; selecting a frequency corresponding to the target phase difference as an initial working frequency; and the initial working frequency is adopted, the target phase difference serves as a phase difference control target, and ultrasonic frequency tracking control is conducted on an ultrasonic welding power source. By the adoption of the scheme, the control parameters of the ultrasonic welding power source can better meet the actual working requirements, the obtained control result is more ideal, and the requirements of different actual welding scenes are met.

Description

Technical Field

[0001] The present application relates to the field of ultrasonic technology, and in particular to a control method, device, medium and product of an ultrasonic welding power supply. Background Art

[0002] In recent years, with the rapid development of science and technology, the application of ultrasonic welding technology has become more and more extensive.

[0003] The existing digital ultrasonic welding power supply frequency tracking control usually adopts a closed-loop control method with a voltage and current phase difference of 0 as the control target. However, under load conditions, especially under heavy load conditions, there may be a situation where the voltage and current phase difference of 0 does not exist within the operating frequency range of the ultrasonic power supply. At this time, the traditional frequency closed-loop control will be abnormal, causing the generator to have overcurrent or overvoltage alarms. In related technologies, the load frequency tracking method is often used to adjust the detection frequency, but the adjustment direction of the frequency and phase difference is fixed, and the dynamic change of the load during actual work causes the resonant frequency to change in different directions. Therefore, it is impossible to achieve reasonable control of the welding power supply according to the actual working conditions. Summary of the invention

[0004] One purpose of the present application is to provide a control method, device, medium and product for an ultrasonic welding power supply, at least to solve the problem that it is difficult to determine the parameters of the welding power supply in response to load changes. After completing the welding preparation action, the present application applies pressure to the welding head and performs a rapid frequency sweep to obtain a frequency sweep curve; obtains the phase difference range according to the frequency sweep curve to obtain the maximum and minimum values ​​of the phase difference; calculates the target phase difference according to the maximum and minimum values ​​of the phase difference; selects the frequency corresponding to the target phase difference as the initial working frequency; adopts the initial working frequency and uses the target phase difference as the phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply. By adopting this scheme, the frequency can be swept according to the pressure of the welding head during the actual welding process, and the initial working frequency and target phase difference of the welding work can be determined based on the information obtained from the frequency sweep, thereby making the control parameters of the ultrasonic welding power supply more in line with the actual working requirements, and the obtained control results are more ideal and meet the requirements of different actual welding scenarios.

[0005] To achieve the above objectives, some embodiments of the present application provide the following aspects:

[0006] In a first aspect, some embodiments of the present application further provide a method for controlling an ultrasonic welding power supply, comprising:

[0007] After completing the welding preparation action, the welding head is pressurized and the frequency is quickly swept to obtain the frequency sweep curve;

[0008] Acquire the phase difference range according to the frequency sweep curve to obtain the maximum and minimum values ​​of the phase difference;

[0009] Calculating a target phase difference according to the maximum and minimum values ​​of the phase difference;

[0010] Select the frequency corresponding to the target phase difference as the initial operating frequency;

[0011] The initial operating frequency is adopted, and the target phase difference is used as a phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply.

[0012] In a second aspect, some embodiments of the present application further provide an electronic device, comprising: one or more processors; and a memory storing computer program instructions, wherein the computer program instructions, when executed, cause the processor to perform the steps of the method described above.

[0013] In a third aspect, some embodiments of the present application further provide a computer-readable medium having computer program instructions stored thereon, wherein the computer program instructions can be executed by a processor to implement the method as described above.

[0014] In a fourth aspect, some embodiments of the present application further provide a computer program product, comprising a computer program / instruction, which implements the steps of the method described above when executed by a processor.

[0015] Compared with the related art, in the solution provided by the embodiment of the present application, after completing the welding preparation action, the welding head is pressurized and the frequency is quickly swept to obtain a frequency sweep curve; the phase difference range is obtained according to the frequency sweep curve to obtain the maximum and minimum values ​​of the phase difference; the target phase difference is calculated according to the maximum and minimum values ​​of the phase difference; the frequency corresponding to the target phase difference is selected as the initial working frequency; the initial working frequency is adopted, and the target phase difference is used as the phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply. By adopting this solution, the frequency can be swept according to the pressure of the welding head during the actual welding process, and the initial working frequency and target phase difference of the welding work can be determined based on the information obtained by the frequency sweep, thereby making the control parameters of the ultrasonic welding power supply more in line with the actual working requirements, and the obtained control results are more ideal and meet the requirements of different actual welding scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1An exemplary flow chart of a control method of an ultrasonic welding power supply according to some embodiments of the present application;

[0018] Figure 2 A schematic diagram of a frequency sweep waveform under ideal conditions provided according to some embodiments of the present application;

[0019] Figure 3 A schematic diagram of a frequency sweep waveform in which a phase control range becomes smaller after loading according to some embodiments of the present application;

[0020] Figure 4 A schematic diagram of a zero-point frequency sweep waveform with no phase difference after loading according to some embodiments of the present application;

[0021] Figure 5 An exemplary structural diagram of the electronic device is disclosed. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] First embodiment

[0024] The first embodiment of the present application relates to a control method for an ultrasonic welding power supply. Figure 1 As shown, the method is executed by a management tool, and the method may include the following steps:

[0025] Step S101, after completing the welding preparation action, applying pressure to the welding head, and performing a rapid frequency sweep to obtain a frequency sweep curve;

[0026] Ultrasonic welding 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. The ultrasonic generator converts 50 / 60 Hz current into 15, 20, 30 or 40KHz electrical energy. The converted high-frequency electrical energy is converted again into mechanical movement of the same frequency through the transducer. The mechanical movement is then transmitted to the welding head through a set of amplitude-changing rod devices that can change the amplitude. The welding head transmits the received vibration energy to the joint of the workpiece to be welded. In this area, the vibration energy is converted into heat energy by friction to melt the plastic. Welding methods include fusion welding, in which the ultrasonic ultra-high frequency vibrating welding head generates friction heat at the joint surface of the two pieces of plastic under moderate pressure, causing them to melt and join instantly. Riveting welding, in which the ultrasonic ultra-high frequency vibrating welding head presses the protruding tip of the plastic product, causing it to heat and melt instantly into a rivet shape, so that materials of different materials are mechanically riveted together. Embedding: With the conduction of the welding head and appropriate pressure, the metal parts are squeezed into the reserved plastic holes instantly and fixed at a certain depth. Molding: The concave welding head is pressed on the outer ring of the plastic product. After the welding head emits ultrasonic ultra-high frequency vibration, the plastic is melted and formed and wrapped around the metal object to fix it. Spot welding: Two pieces of plastic are welded at different points without pre-designing welding lines, or for relatively large workpieces, workpieces that are not suitable for designing welding lines, spot welding is performed to achieve the welding effect. Cutting and sealing: Using the working principle of ultrasonic instantaneous oscillation, chemical fiber fabrics are cut. It has the advantages of fast welding speed, high welding strength, good sealing, low cost, clean and pollution-free, and stable welding process.

[0027] Ultrasonic welding power supply control is mainly to enable the ultrasonic welding power supply to stably and efficiently output the required high-frequency electrical energy to drive the transducer to produce stable mechanical vibration, thereby achieving high-quality ultrasonic welding. At the same time, through precise power supply control, the welding parameters can be adjusted according to different welding materials, workpiece shapes and welding requirements, the welding process can be optimized, the welding efficiency and quality can be improved, and the service life of the equipment can be extended. Frequency automatic tracking, because the resonant frequency of the ultrasonic transducer will drift with factors such as ambient temperature and load changes, it is necessary to adopt frequency automatic tracking technology to monitor the operating frequency of the transducer in real time and automatically adjust the output frequency of the ultrasonic power supply to keep it near the resonant frequency of the transducer to ensure that the transducer can obtain the maximum mechanical vibration efficiency and improve the welding effect and stability. Power control, according to the characteristics of the welding material, the thickness and size of the workpiece and other factors, the output power of the ultrasonic power supply is accurately controlled to provide appropriate welding energy. Power control methods include constant power control, time-power control, etc., and the power can be adjusted by adjusting the output voltage, current and other parameters of the power supply to ensure the consistency of welding quality. Phase difference control monitors and controls the voltage and current phase difference at both ends of the ultrasonic transducer to optimize the energy transfer and conversion during the welding process. By adjusting the phase difference, the transducer can better absorb and convert electrical energy into mechanical energy, improving welding efficiency and quality.

[0028] Among them, welding preparation actions can be a series of preparatory work that needs to be completed before welding operations, including but not limited to preparing welding materials, checking welding equipment, cleaning the surface of weldments, etc., in order to create good conditions for subsequent welding operations.

[0029] The welding head is the component in the welding equipment that directly contacts the weldment and transfers energy to achieve welding. Its shape, material and performance will affect the welding quality and effect.

[0030] The frequency sweep curve can be a curve obtained by a frequency sweep operation. It reflects the relationship between a physical quantity (such as voltage, current, amplitude, etc.) and the frequency change within a certain frequency range. In ultrasonic welding, it can be used to analyze and evaluate the relevant characteristics of the welding process.

[0031] This solution can complete all welding preparation actions in accordance with the requirements and specifications, and reach a state where the next welding operation can be carried out. The determination method is to check and confirm each preparation work one by one. Apply a certain pressure to the welding head to make close contact between the welding head and the weldment, thereby ensuring the effective transfer of welding energy. The pressure is usually obtained by setting and controlling the required pressure value through the pressure regulating device in the welding equipment. Specifically, specific instruments or equipment can be used to perform continuous frequency scanning operations on a certain frequency range in a short period of time to obtain the corresponding frequency sweep curve. The acquisition method is to automatically collect and record data according to the set frequency range and scanning speed with the help of a frequency sweep instrument.

[0032] Figure 2 A schematic diagram of a frequency sweep waveform under ideal conditions provided according to some embodiments of the present application. Figure 3 This is a schematic diagram of a frequency sweep waveform in which the phase control range becomes smaller after being loaded according to some embodiments of the present application. Figure 4 This is a schematic diagram of a zero-point frequency sweep waveform with no phase difference after loading according to some embodiments of the present application.

[0033] In one embodiment, optionally, the welding head is subjected to pressure treatment and a rapid frequency sweep is performed, including:

[0034] Perform a quick frequency sweep when pressing the welding head down to the predetermined position;

[0035] or,

[0036] When the pressure applied to the welding head reaches the predetermined pressure, a rapid frequency sweep is performed.

[0037] When the welding head is pressed down to the predetermined position, a rapid frequency sweep is performed, wherein the welding head can be moved downward in the vertical direction until it reaches the preset position through a specific driving device, such as a cylinder, an electric push rod, etc. This predetermined position is determined based on factors such as the shape and size of the welding workpiece and the requirements of the welding process, in order to ensure that a suitable contact state can be formed between the welding head and the weldment so as to effectively transmit ultrasonic energy. At the moment when the welding head is pressed down to the predetermined position or in a very short time thereafter, the rapid frequency sweep operation is started. Frequency sweep refers to the rapid change of the frequency output by the ultrasonic power supply within a certain range, usually starting from a value lower than the resonant frequency of the transducer, gradually increasing to a value higher than the resonant frequency, and then quickly returning to the starting frequency, and so on and so forth. Through rapid frequency sweeping, the optimal resonant frequency of the transducer in the current welding state can be found, so that the transducer can output the maximum mechanical vibration amplitude, thereby improving welding efficiency and quality.

[0038] Pressing down to the predetermined position is a prerequisite for rapid frequency sweeping. Only when the welding head is in the correct position can the frequency sweeping accurately obtain the resonant frequency that matches the current welding condition. Inaccurate pressing down position may lead to uneven contact pressure or inappropriate contact area between the welding head and the weldment, thus affecting the frequency sweeping results and subsequent welding effects.

[0039] When the pressure applied to the welding head reaches a predetermined pressure, a rapid frequency sweep is performed. This can be done by using a pressure control system, such as an air pressure regulating valve, a hydraulic pump, etc., to apply gradually increasing pressure to the welding head until a preset pressure value is reached. This predetermined pressure is calculated based on factors such as the characteristics of the welding material, the thickness and strength of the weld, and can keep the weld in close contact during the welding process without causing damage to the weld or excessive wear of the welding head due to excessive pressure. When the pressure applied to the welding head reaches a predetermined pressure, the rapid frequency sweep process starts immediately. Similar to the frequency sweep when pressing down to a predetermined position as mentioned above, the optimal resonant frequency of the transducer is found by rapidly changing the output frequency of the ultrasonic power supply within a certain frequency range to obtain the strongest mechanical vibration effect and ensure welding quality.

[0040] The preset pressure is the key factor to trigger the fast frequency sweep. The frequency sweep operation is performed only when the pressure reaches the set value. This ensures that during the welding process, the welding head always transmits energy with the best pressure and frequency combination, so that the weldment can achieve a good welding effect under the appropriate pressure and vibration conditions. If the frequency sweep is performed before the pressure reaches the preset value, the ultrasonic energy transmission may be poor due to the insufficient contact between the welding head and the weldment, thus affecting the welding quality.

[0041] Through such a setting, this scheme can determine the phase-frequency curve by frequency sweeping before welding starts, extract the phase control range, and select the appropriate target phase and corresponding frequency as the initial working frequency. In subsequent work, the target phase is used as the control target for frequency tracking control. This scheme requires a quick frequency sweep before ultrasonic work, which is suitable for metal welding and plastic welding, which require a certain pressure on the welding head and the weldment to increase the load so that there is no voltage and current phase difference of 0 within the working frequency range.

[0042] Step S102, obtaining a phase difference range according to the frequency sweep curve, and obtaining a maximum value and a minimum value of the phase difference;

[0043] Among them, the phase difference range can be the range of phase difference values ​​corresponding to different frequencies during the frequency sweep process. It reflects the change of the phase relationship between related physical quantities in the welding process, which is of great significance for analyzing and controlling welding quality.

[0044] The maximum value and the minimum value refer to the maximum value and the minimum value in the phase difference range, respectively. These two values ​​can clearly define the boundary of the phase difference change and help to further understand the characteristics and laws of the welding process.

[0045] This solution analyzes and extracts information about the phase difference range from the frequency sweep curve, and the determination method is to perform data processing and analysis on the corresponding relationship between the frequency and the phase difference reflected by the frequency sweep curve, thereby determining the value range of the phase difference.

[0046] Step S103, calculating a target phase difference according to the maximum value and the minimum value of the phase difference;

[0047] Among them, the target phase difference can be a desired phase difference value calculated from the maximum and minimum values ​​of the phase difference according to a specific calculation method or requirement. This value will be used for subsequent ultrasonic welding power supply control and other operations to achieve the purpose of optimizing the welding effect.

[0048] In this solution, the maximum and minimum values ​​of the phase difference can be substituted into a certain mathematical formula or algorithm for calculation, thereby obtaining the target phase difference. The method of obtaining the target phase difference is to calculate manually or use a tool such as computer software to automatically complete the calculation process according to a preset calculation method.

[0049] Step S104, selecting the frequency corresponding to the target phase difference as the initial operating frequency;

[0050] The target phase difference may be an expected phase difference value obtained through calculation, and is a key reference for selecting the initial operating frequency.

[0051] In ultrasonic welding, frequency refers to the frequency of ultrasonic vibration, which is closely related to welding energy, welding effect, etc. Different frequencies may be suitable for different welding materials and welding requirements.

[0052] The initial operating frequency may refer to the initial frequency value set when starting the ultrasonic welding operation. The selection of this value will directly affect the initial welding effect and the subsequent welding process, and is usually determined based on factors such as the target phase difference.

[0053] The frequency corresponding to the target phase difference is used as the initial operating frequency. The determination method is to find the frequency value corresponding to the target phase difference by searching the frequency sweep curve or related data records, and determine it as the initial operating frequency.

[0054] Step S105, adopting the initial working frequency and taking the target phase difference as the phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply.

[0055] Ultrasonic frequency tracking control is a control method that adjusts the output frequency of the ultrasonic welding power supply in real time according to the set target phase difference and other parameters during the ultrasonic welding process, so that the actual phase difference is as close to the target phase difference as possible, which can effectively improve the welding quality and stability.

[0056] The determined initial operating frequency is applied to the parameter setting of the ultrasonic welding power supply so that it outputs ultrasonic vibration energy at the frequency. The acquisition method is to operate the frequency setting function of the ultrasonic welding power supply and input or select the corresponding initial operating frequency value.

[0057] The target phase difference is set as the target value of the phase difference control, providing a clear control direction and target requirement for the ultrasonic frequency tracking control. The determination method is to set and store the specific value of the target phase difference as a control parameter in the ultrasonic frequency tracking control system.

[0058] Start and implement the ultrasonic frequency tracking control operation, so that the ultrasonic welding power supply can automatically adjust the output frequency according to the actual welding situation and the target phase difference requirements. The acquisition method is to monitor the actual phase difference in real time during the welding process, compare it with the target phase difference, and then automatically adjust the output frequency of the ultrasonic welding power supply according to the comparison result to achieve dynamic tracking and control of the phase difference.

[0059] The solution provided in the embodiment of the present application is to apply pressure to the welding head after completing the welding preparation action, and perform a rapid frequency sweep to obtain a frequency sweep curve; obtain the phase difference range according to the frequency sweep curve to obtain the maximum and minimum values ​​of the phase difference; calculate the target phase difference according to the maximum and minimum values ​​of the phase difference; select the frequency corresponding to the target phase difference as the initial working frequency; use the initial working frequency and the target phase difference as the phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply. By adopting this solution, the frequency can be swept according to the pressure of the welding head during the actual welding process, and the initial working frequency and target phase difference of the welding work can be determined based on the information obtained from the frequency sweep, thereby making the control parameters of the ultrasonic welding power supply more in line with the actual working requirements, and the obtained control results are more ideal and meet the requirements of different actual welding scenarios.

[0060] In one embodiment, optionally, calculating the target phase difference according to the maximum value and the minimum value of the phase difference includes:

[0061] The average value of the maximum value and the minimum value of the phase difference is taken as the target phase difference.

[0062] In this solution, specifically, the target phase difference may be taken as the middle value of the phase difference range, that is, (maximum phase difference value+minimum phase difference value) / 2, as the target phase difference.

[0063] The method of determining the target phase difference in this scheme is simple to calculate and meets the requirements for welding power supply control.

[0064] In one embodiment, optionally, calculating the target phase difference according to the maximum value and the minimum value of the phase difference includes:

[0065] Calculate the difference between the maximum and minimum values ​​of the phase difference;

[0066] The target phase difference is determined according to the variation amplitude difference, the minimum value of the phase difference and a preset adjustment coefficient.

[0067] In another solution, the phase increment may be determined by the variation amplitude difference and a preset adjustment coefficient, and added to the minimum value of the phase difference to obtain the final target phase difference.

[0068] By setting a preset adjustment coefficient, this solution can make the calculation of the target phase difference more controllable and improve the calculation accuracy.

[0069] In one embodiment, optionally, determining the target phase difference according to the variation amplitude difference, the minimum phase difference and a preset adjustment coefficient includes:

[0070] The calculation is done using the following formula;

[0071] Target phase difference = k × change amplitude difference + minimum value;

[0072] Wherein, k is the preset adjustment coefficient.

[0073] Among them, k is the adjustment coefficient, the value range is 0-1, which is used to select the position of the target phase difference. The smaller the k value, the closer the target phase difference is to the minimum value, and the larger the k value, the closer the target phase difference is to the maximum value. When k = 0.5, the implementation process is the same as the previous solution. Usually the range of k is 0.4-0.5, which can be adjusted according to the actual test results.

[0074] This solution can better deal with the problem that the traditional frequency tracking effect becomes poor or cannot be correctly tracked due to heavy load by performing frequency scanning before ultrasonic welding to determine the target phase difference and initial working frequency. The principle of this method is clear and the work is simple and easy to implement.

[0075] In addition, some embodiments of the present application also provide an electronic device. The electronic device may be a digital computer in various forms, such as a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, etc. The electronic device may also be a mobile device in various forms, such as a personal digital assistant, a cellular phone, a smart phone, a wearable device, and other similar computing devices.

[0076] The electronic device includes: one or more processors; and a memory storing computer program instructions, wherein when the computer program instructions are executed, the processor executes the steps of the method provided in any one or more of the above embodiments. Figure 5 An exemplary structural diagram of the electronic device is disclosed. Figure 5 As shown, the electronic device includes: one or more processors 501, a memory 502, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Among them, the components shown in this article, their connections and relationships, and their functions are only used as examples, and are not intended to limit the implementation of the present application described and / or required herein.

[0077] The electronic device may further include: an input device 503 and an output device 504. The processor 501, the memory 502, the input device 503 and the output device 504 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0078] The input device 503 can receive input digital or character information, and generate key signal input related to the user settings and function control of the electronic device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator rod, one or more mouse buttons, a trackball, a joystick and other input devices. The output device 504 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display and a plasma display. In some embodiments, the display device may be a touch screen.

[0079] In order to provide interaction with the user, the electronic device may be a computer. The computer has: a display device (e.g., a cathode ray tube (CRT) or an LCD monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0080] In the embodiments of the present application, a computer program / instruction is stored on a computer-readable medium, and when the computer program / instruction is executed by a processor, the steps of the method provided by any one or more of the above embodiments are implemented. The computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently without being assembled into the device. The above computer-readable medium carries one or more computer-readable instructions.

[0081] The memory 502 can be used as a non-transient computer-readable storage medium, which can be used to store non-transient software programs, non-transient computer executable programs and modules. The processor 501 executes various functional applications and data processing of the server by running the non-transient software programs, instructions and modules stored in the memory 502, so as to implement the program instructions / modules corresponding to the method provided by any one or more embodiments in the embodiments of the present application.

[0082] The memory 502 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 502 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory 502 may optionally include a memory remotely arranged relative to the processor 501, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0083] It should be noted that the computer-readable medium described in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM, Compact Disc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device.

[0084] Computer readable media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change random-access memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0085] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0086] In the above-described embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. For example, it can be implemented by using a dedicated integrated circuit (ASIC, Application-Specific Integrated Circuit), a general-purpose computer or any other similar hardware device. In certain embodiments, the software program of the present application can be executed by a processor to implement the above steps or functions. Similarly, the software program of the present application (including relevant data structures) can be stored in a computer-readable recording medium, for example, a RAM memory, a magnetic or optical drive or a floppy disk and similar devices. In addition, some steps or functions of the present application can be implemented by hardware, for example, as a circuit that cooperates with a processor to perform each step or function.

[0087] The computer program product provided in the embodiment of the present application includes one or more computer programs / instructions, which, when executed by the processor, generate in whole or in part the process or function described in the embodiment of the present application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL, Digital Subscriber Line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive, SSD, solid statedisk), etc.

[0088] The flow chart or block diagram in the accompanying drawings shows the possible architecture, function and operation of the equipment, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated system for hardware that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0089] The scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim may also be implemented by one unit or device through software or hardware. The words "first", "second", etc. are only used to distinguish the description, and do not indicate any particular order, nor can they be understood as indicating or implying relative importance.

[0090] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily mention changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims, and the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. A method for controlling an ultrasonic welding power supply, characterized in that: The method comprises: After completing the welding preparation action, the welding head is pressurized and the frequency is quickly swept to obtain the frequency sweep curve; Acquire the phase difference range according to the frequency sweep curve to obtain the maximum and minimum values ​​of the phase difference; Calculating a target phase difference according to the maximum and minimum values ​​of the phase difference; Select the frequency corresponding to the target phase difference as the initial operating frequency; The initial operating frequency is adopted, and the target phase difference is used as a phase difference control target to perform ultrasonic frequency tracking control on the ultrasonic welding power supply.

2. The method according to claim 1, characterized in that Apply pressure to the welding head and perform a rapid frequency sweep, including: Perform a quick frequency sweep when pressing the welding head down to the predetermined position; or, When the pressure applied to the welding head reaches the predetermined pressure, a rapid frequency sweep is performed.

3. The method according to claim 1, characterized in that Calculating a target phase difference according to the maximum value and the minimum value of the phase difference includes: The average value of the maximum value and the minimum value of the phase difference is taken as the target phase difference.

4. The method according to claim 1, characterized in that Calculating a target phase difference according to the maximum value and the minimum value of the phase difference includes: Calculate the difference between the maximum and minimum values ​​of the phase difference; The target phase difference is determined according to the variation amplitude difference, the minimum value of the phase difference and a preset adjustment coefficient.

5. The method according to claim 4, characterized in that Determining a target phase difference according to the change amplitude difference, the minimum value of the phase difference and a preset adjustment coefficient includes: The calculation is done using the following formula; Target phase difference = k × change amplitude difference + minimum value; Wherein, k is the preset adjustment coefficient.

6. The method according to claim 1, characterized in that Before calculating the target phase difference according to the maximum value and the minimum value of the phase difference, the method further includes: Identify whether the minimum value of the phase difference is less than a set threshold; If so, the target phase difference of the ultrasonic welding power source is determined to be 0.

7. The method according to claim 6, characterized in that After identifying whether the minimum value of the phase difference is less than a set threshold, the method further includes: If not, the target phase difference is calculated according to the maximum and minimum values ​​of the phase difference.

8. An electronic device, characterized in that: The electronic device comprises: one or more processors; and A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method as claimed in any one of claims 1 to 7.

9. A computer readable medium having a computer program / instructions stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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