A temperature control method and related equipment for a laser solder wire welding machine

Abstract

This application relates to the field of welding technology, and in particular to a temperature control method and related equipment for a laser solder wire welding machine. The method includes: acquiring the real-time temperature and suitable temperature of the solder joint based on current operating information; acquiring a first temperature difference based on the real-time temperature and the suitable temperature; if the first temperature difference exceeds a first temperature threshold, acquiring the current laser power; acquiring a power-temperature conversion relationship; if the current laser power is greater than the rated minimum power but less than the rated maximum power, acquiring a first power difference based on the current laser power and the rated minimum power, and acquiring a second power difference based on the current laser power and the rated maximum power; acquiring a corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference; and adjusting the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint. This application helps improve the temperature control capability of the laser solder wire welding machine, thereby improving welding quality.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a temperature control method and related equipment for a laser solder wire welding machine. Background Technology

[0002] Laser soldering machines are widely used in industries such as electronics manufacturing. They use the energy of a laser beam to melt solder wire, thereby connecting electronic components to circuit boards. Temperature control during the soldering process plays a decisive role in the soldering quality. If the temperature is too high, it can easily lead to overheating and damage to components around the solder joint, solder pad detachment, and solder ball splattering, seriously affecting product performance and reliability. If the temperature is too low, the solder wire cannot melt sufficiently, resulting in defects such as weak solder joints and incomplete soldering, which also reduces product quality.

[0003] Currently, temperature control methods for laser soldering machines have several shortcomings. These are mainly reflected in the following: traditional open-loop control methods, such as those relying solely on preset laser power and welding time, cannot detect real-time temperature changes during the welding process. Due to differences in the material, thickness, and thermal conductivity of the objects being welded, as well as fluctuations in ambient temperature, this fixed-parameter control method struggles to guarantee precise temperature control under various operating conditions, leading to unstable welding quality. Summary of the Invention

[0004] To improve the temperature control capability of laser solder wire welding machines and thus improve welding quality, this application provides a temperature control method and related equipment for laser solder wire welding machines.

[0005] Firstly, this application provides a temperature control method for a laser solder wire welding machine, which adopts the following technical solution: A temperature control method for a laser soldering machine, comprising: Obtain current operating condition information; Based on the current operating condition information, obtain the real-time temperature and suitable temperature of the solder joint; Based on the real-time temperature of the solder joint and the suitable temperature of the solder joint, a first temperature difference is obtained; If the first temperature difference exceeds the first temperature threshold, then obtain the current laser power; Based on the aforementioned operating condition information, the power-temperature conversion relationship is obtained; If the current laser power is greater than the rated minimum power and less than the rated maximum power, then a first power difference is obtained based on the current laser power and the rated minimum power, and a second power difference is obtained based on the current laser power and the rated maximum power; Based on the power-temperature conversion relationship, the first power difference, and the second power difference, the corresponding adjustable temperature range is obtained. Based on the adjustable temperature range and the suitable temperature of the solder joint, the current laser power is adjusted.

[0006] By adopting the above technical solution, the current working condition information is first obtained, and based on this, the real-time temperature and suitable temperature of the solder joint are obtained, and the first temperature difference between the two is calculated. When the first temperature difference exceeds the first temperature threshold, it indicates that the temperature difference between the real-time temperature and the suitable temperature of the solder joint is large, that is, the real-time temperature of the solder joint does not meet the welding requirements of the welding material. Therefore, the current laser power is obtained, and the power-temperature conversion relationship is determined in combination with the working condition information. If the current laser power is between the rated minimum power and the rated maximum power, the first power difference and the second power difference between it and the rated minimum power and the rated maximum power are calculated respectively. Then, the adjustable temperature range is obtained through the power-temperature conversion relationship. Finally, the current laser power is adjusted according to the adjustable temperature range and the suitable temperature of the solder joint. Through real-time monitoring and dynamic adjustment, the temperature of the solder joint can be precisely controlled within a suitable range, avoiding welding quality problems caused by excessively high or low temperatures. By utilizing the power-temperature conversion relationship and adjustable temperature range, fine control of laser power can be achieved, improving the stability and reliability of the welding process. At the same time, adjustment within the rated power range can effectively protect the equipment and extend the service life of the laser solder wire welding machine.

[0007] Optionally, obtaining the power-temperature conversion relationship based on the operating condition information further includes: Based on the aforementioned working condition information, the welding material type, welding machine parameters, and environmental information are obtained; Based on the type of welding material, the characteristics of the welding material are obtained; Based on the welding machine parameters, process parameters and welding usage parameters are obtained; Based on the environmental information, the heat dissipation coefficient is obtained; Based on the characteristics of the welding material, the process parameters, the welding usage parameters, and the heat dissipation coefficient, the power-temperature conversion relationship is obtained.

[0008] Optionally, obtaining the power-temperature conversion relationship based on the welding material properties, the process parameters, the welding usage parameters, and the heat dissipation coefficient includes: Based on the environmental information, obtain the ambient temperature; Based on the welding material properties, the process parameters, the usage parameters, and the heat dissipation coefficient, the target conversion factor is obtained; Based on the ambient temperature and the target conversion factor, the power-temperature conversion relationship is obtained, and the power-temperature conversion relationship satisfies the following calculation formula: P = K × (T - T0) Where P is power, K is the target conversion factor, T is temperature, and T0 is ambient temperature.

[0009] Optionally, obtaining the target conversion factor based on the welding material properties, the process parameters, the usage parameters, and the heat dissipation coefficient includes: Based on the properties of the welding material, the thermal conductivity of the welding material is obtained; Based on the process parameters, the heat dissipation area and heat conduction path length are obtained; Based on the aforementioned usage parameters and the characteristics of the welding material, the energy absorption rate is obtained; Based on the thermal conductivity, the heat dissipation area, the heat conduction path length, the energy absorption rate, and the heat dissipation coefficient, a target conversion factor is obtained, which satisfies the following calculation formula: in, k is the energy absorption rate. m Where is the thermal conductivity, A is the heat dissipation area, L is the heat conduction path length, and h is the heat dissipation coefficient.

[0010] Optionally, obtaining the corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference includes: Based on the power-temperature conversion relationship and the first power difference, the first adjustment temperature is obtained; Based on the real-time temperature of the solder joint and the first adjustable temperature, the lowest adjustable temperature is obtained; Based on the power-temperature conversion relationship and the second power difference, the second adjustment temperature is obtained; Based on the real-time temperature of the solder joint and the second adjustable temperature, the maximum adjustable temperature is obtained; Based on the minimum and maximum adjustable temperatures, the adjustable temperature range is obtained.

[0011] Optionally, adjusting the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint includes: Determine whether the suitable temperature of the solder joint is within the adjustable temperature range; If the suitable temperature of the solder joint is within the adjustable temperature range, then the current laser power is adjusted based on the suitable temperature of the solder joint; If the suitable temperature of the solder joint is not within the adjustable temperature range, then obtain the unit welding time and the current welding time; Based on the unit welding time and the current welding time, the remaining welding time is obtained; Obtain the unit rate of change of the real-time temperature of the solder joint; The current laser power is adjusted based on the remaining welding time, the unit rate of change, and the suitable temperature of the weld joint.

[0012] Optionally, adjusting the current laser power based on the remaining welding time, the unit rate of change, and the suitable temperature of the weld joint includes: Based on the remaining welding time and the unit rate of change, the ideal temperature is obtained. Based on the adjustable temperature range and the real-time temperature of the solder joint, the adjustable temperature of the solder joint is obtained; The target temperature is obtained based on the adjustable temperature of the solder joint and the ideal changing temperature. If the ideal temperature change does not exceed the second temperature threshold and the target temperature does not exceed the third temperature threshold, then the current laser power is adjusted based on the suitable temperature of the solder joint.

[0013] Secondly, this application also discloses a temperature control system for a laser solder wire welding machine, which adopts the following technical solution: A temperature control system for a laser soldering machine includes: The first acquisition module is used to acquire current operating condition information; The second acquisition module is used to acquire the real-time temperature and suitable temperature of the solder joint based on the current working condition information. The third acquisition module is used to acquire a first temperature difference based on the real-time temperature of the solder joint and the suitable temperature of the solder joint; The fourth acquisition module is used to acquire the current laser power if the first temperature difference exceeds the first temperature threshold. The fifth acquisition module is used to acquire the power-temperature conversion relationship based on the operating condition information; The sixth acquisition module, if the current laser power is greater than the rated minimum power and less than the rated maximum power, is used to acquire a first power difference based on the current laser power and the rated minimum power, and to acquire a second power difference based on the current laser power and the rated maximum power; The seventh acquisition module is used to acquire the corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference. The power adjustment module is used to adjust the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint.

[0014] By adopting the above technical solution, the current working condition information is first obtained, and based on this, the real-time temperature and suitable temperature of the solder joint are obtained, and the first temperature difference between the two is calculated. When the first temperature difference exceeds the first temperature threshold, it indicates that the temperature difference between the real-time temperature and the suitable temperature of the solder joint is large, that is, the real-time temperature of the solder joint does not meet the welding requirements of the welding material. Therefore, the current laser power is obtained, and the power-temperature conversion relationship is determined in combination with the working condition information. If the current laser power is between the rated minimum power and the rated maximum power, the first power difference and the second power difference between it and the rated minimum power and the rated maximum power are calculated respectively. Then, the adjustable temperature range is obtained through the power-temperature conversion relationship. Finally, the current laser power is adjusted according to the adjustable temperature range and the suitable temperature of the solder joint. Through real-time monitoring and dynamic adjustment, the temperature of the solder joint can be precisely controlled within a suitable range, avoiding welding quality problems caused by excessively high or low temperatures. By utilizing the power-temperature conversion relationship and adjustable temperature range, fine control of laser power can be achieved, improving the stability and reliability of the welding process. At the same time, adjustment within the rated power range can effectively protect the equipment and extend the service life of the laser solder wire welding machine.

[0015] Thirdly, the computer device provided in this application adopts the following technical solution: A smart terminal includes a memory and a processor, wherein the memory stores a computer program that can run on the processor, and when the processor loads the computer program, it executes the method of the first aspect.

[0016] By adopting the above technical solution, a computer program is generated based on the method of the first aspect and stored in a memory for loading and execution by a processor. Thus, a smart terminal is made based on the memory and the processor, making it convenient for users to use.

[0017] Fourthly, the computer-readable storage medium provided in this application adopts the following technical solution: A computer-readable storage medium storing a computer program that, when loaded by a processor, executes the method of the first aspect.

[0018] By adopting the above technical solution, a computer program is generated based on the method of the first aspect and stored in a computer-readable storage medium for loading and execution by a processor. The computer-readable storage medium facilitates the reading and storage of the computer program.

[0019] In summary, this application includes the following beneficial technical effects: First, obtain the current working condition information. Based on this, obtain the real-time temperature and suitable temperature of the solder joint and calculate the first temperature difference between the two. When the first temperature difference exceeds the first temperature threshold, it indicates that the temperature difference between the real-time temperature and the suitable temperature of the solder joint is large, that is, the real-time temperature of the solder joint does not meet the welding requirements of the welding material. Therefore, obtain the current laser power and determine the power-temperature conversion relationship based on the working condition information. If the current laser power is between the rated minimum power and the rated maximum power, calculate the first power difference and the second power difference between it and the rated minimum power and the rated maximum power, respectively. Then, obtain the adjustable temperature range through the power-temperature conversion relationship. Finally, adjust the current laser power according to the adjustable temperature range and the suitable temperature of the solder joint. Through real-time monitoring and dynamic adjustment, the temperature of the solder joint can be precisely controlled within a suitable range, avoiding welding quality problems caused by excessively high or low temperatures. By utilizing the power-temperature conversion relationship and adjustable temperature range, fine control of laser power can be achieved, improving the stability and reliability of the welding process. At the same time, adjustment within the rated power range can effectively protect the equipment and extend the service life of the laser solder wire welding machine. Attached Figure Description

[0020] Figure 1 This is a main flowchart of a temperature control method for a laser solder wire welding machine according to an embodiment of this application; Figure 2 This is a flowchart of steps S201 to S205; Figure 3 This is a flowchart of steps S301 to S303; Figure 4 This is a flowchart of steps S401 to S404; Figure 5 This is a flowchart of steps S501 to S505; Figure 6 This is a flowchart of steps S601 to S606; Figure 7 This is a flowchart of steps S701 to S704; Figure 8 This is a block diagram of the temperature control system of a laser solder wire welding machine according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1. First acquisition module; 2. Second acquisition module; 3. Third acquisition module; 4. Fourth acquisition module; 5. Fifth acquisition module; 6. Sixth acquisition module; 7. Seventh acquisition module; 8. Power adjustment module. Detailed Implementation

[0022] In the first aspect, this application discloses a temperature control method for a laser solder wire welding machine.

[0023] Reference Figure 1 A temperature control method for a laser soldering machine, comprising steps S101 to S108: Step S101: Obtain current operating condition information.

[0024] Specifically, in this embodiment, the current working condition information refers to the information of environmental parameters and equipment status data collected in real time during the welding process, including but not limited to ambient temperature / humidity, welding material type, laser head position / angle, welding speed / wire feed rate, etc.

[0025] Step S102: Based on the current working condition information, obtain the real-time temperature of the solder joint and the suitable temperature for the solder joint.

[0026] Specifically, the real-time temperature of the solder joint is the surface temperature value of the solder joint measured in real time. In this embodiment, the real-time temperature of the solder joint can be measured by an infrared thermometer or a temperature sensor. The suitable temperature of the solder joint is the target temperature set according to the welding material and process requirements.

[0027] Step S103: Obtain the first temperature difference based on the real-time temperature of the solder joint and the suitable temperature of the solder joint.

[0028] Specifically, in this embodiment, the first temperature difference is the absolute value of the difference between the real-time temperature of the solder joint and the suitable temperature of the solder joint.

[0029] Step S104: If the first temperature difference exceeds the first temperature threshold, then obtain the current laser power.

[0030] Specifically, in this embodiment, the first temperature difference is the first temperature difference threshold preset by the system, and exceeding this value triggers the power adjustment mechanism; the current laser power is the output power of the laser generator at the current time node.

[0031] Step S105: Based on the operating condition information, obtain the power-temperature conversion relationship.

[0032] Specifically, the power-temperature conversion relationship describes the relationship between the current laser power and the real-time temperature of the solder joint. In this embodiment, it can be represented by a mathematical model.

[0033] Step S106: If the current laser power is greater than the rated minimum power and less than the rated maximum power, then obtain the first power difference based on the current laser power and the rated minimum power, and obtain the second power difference based on the current laser power and the rated maximum power.

[0034] Specifically, in this embodiment, the rated minimum power is the lowest power at which the equipment can operate safely; the rated maximum power is the highest power at which the equipment can operate safely; the first power difference is the difference between the current laser power and the rated minimum power; and the second power difference is the difference between the rated maximum power and the current laser power.

[0035] Step S107: Based on the power-temperature conversion relationship, the first power difference, and the second power difference, obtain the corresponding adjustable temperature range.

[0036] Specifically, in this embodiment, the adjustable temperature range is the temperature range that can be achieved by adjusting the power under the current operating conditions.

[0037] Step S108: Adjust the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint.

[0038] The temperature control method for the laser solder wire welding machine provided in this embodiment first obtains the current working condition information, and based on this, obtains the real-time temperature and suitable temperature of the solder joint and calculates the first temperature difference between the two. When the first temperature difference exceeds the first temperature threshold, it indicates that the temperature difference between the real-time temperature and the suitable temperature of the solder joint is large, that is, the real-time temperature of the solder joint does not meet the welding requirements of the solder material. Therefore, the current laser power is obtained, and the power-temperature conversion relationship is determined in combination with the working condition information. If the current laser power is between the rated minimum power and the rated maximum power, the first power difference and the second power difference between it and the rated minimum power and the rated maximum power are calculated respectively. Then, the adjustable temperature range is obtained through the power-temperature conversion relationship. Finally, the current laser power is adjusted according to the adjustable temperature range and the suitable temperature of the solder joint.

[0039] Through real-time monitoring and dynamic adjustment, the temperature of the solder joint can be precisely controlled within a suitable range, avoiding welding quality problems caused by excessively high or low temperatures. By utilizing the power-temperature conversion relationship and adjustable temperature range, fine control of laser power can be achieved, improving the stability and reliability of the welding process. At the same time, adjustment within the rated power range can effectively protect the equipment and extend the service life of the laser solder wire welding machine.

[0040] Reference Figure 2 In one embodiment of this example, step S105, based on operating condition information, obtains the power-temperature conversion relationship, including steps S201 to S205: Step S201: Based on the working condition information, obtain the welding material type, welding machine parameters and environmental information.

[0041] Specifically, in this embodiment, the welding material type refers to the type of welding material used in the welding process. Different types of welding materials have different physical and chemical properties, which directly affect the temperature requirements and welding effect during the welding process. The welding machine parameters refer to the parameters related to the welding process set by the laser solder wire welding machine itself, including process parameters and welding usage parameters. Process parameters are parameters directly related to the welding process, such as laser focal length and spot diameter. Welding usage parameters are parameters related to material delivery and energy input during the welding process, such as wire feed speed and laser power. Environmental information refers to the physical state parameters of the surrounding environment during the welding process, including ambient temperature, ambient humidity, and air velocity.

[0042] Step S202: Obtain the characteristics of the welding material based on the type of welding material.

[0043] Specifically, in this embodiment, the characteristics of the welding material are the physical and chemical properties determined by the type of welding material, including thermal conductivity, melting point, and energy absorption rate.

[0044] Step S203: Based on the welding machine parameters, obtain the process parameters and welding usage parameters.

[0045] Step S204: Obtain the heat dissipation coefficient based on environmental information.

[0046] Specifically, in this embodiment, the heat dissipation coefficient represents the ability of an object to transfer heat from its surface to the surrounding environment during the heat dissipation process, and its unit is watts per square kelvin (W / m²•K). The heat dissipation coefficient is related to environmental factors (such as air velocity, ambient temperature, etc.). In this embodiment, the heat dissipation coefficient is mainly affected by air velocity and can be calculated using the formula h=a+bv, where a is a constant coefficient, h is the heat dissipation coefficient, and v is the air velocity.

[0047] Step S205: Based on the characteristics of welding materials, process parameters, welding usage parameters, and heat dissipation coefficient, obtain the power-temperature conversion relationship.

[0048] The temperature control method for the laser solder wire welding machine provided in this embodiment first obtains the type of welding material, welding machine parameters, and environmental information based on the working condition information. Then, it obtains the characteristics of the welding material based on the type of welding material, and obtains the process parameters and welding usage parameters based on the welding machine parameters. It obtains the heat dissipation coefficient through environmental information, and finally obtains the power-temperature conversion relationship by comprehensively considering the characteristics of the welding material, process parameters, welding usage parameters, and heat dissipation coefficient. Through the detailed decomposition and comprehensive analysis of the working condition information, the influence of various factors on temperature during the welding process can be accurately grasped, thereby obtaining a more accurate power-temperature conversion relationship. Temperature control based on this accurate relationship can significantly improve the adaptability of the laser solder wire welding machine to different working conditions, make temperature regulation more precise, and effectively reduce welding quality problems caused by improper temperature control, such as cold solder joints and overheating damage to solder joints, thereby improving welding quality and product reliability.

[0049] Reference Figure 3 In one embodiment of this example, step S205, based on the characteristics of the welding material, process parameters, welding usage parameters, and heat dissipation coefficient, obtains the power-temperature conversion relationship, including steps S301 to S303: Step S301: Obtain the ambient temperature based on environmental information.

[0050] Specifically, in this embodiment, ambient temperature refers to the temperature of the environment surrounding the welding site.

[0051] Step S302: Obtain the target conversion factor based on the characteristics of the welding material, process parameters, usage parameters, and heat dissipation coefficient.

[0052] Step S303: Obtain the power-temperature conversion relationship based on ambient temperature and target conversion factor.

[0053] Specifically, in this embodiment, the power-temperature conversion relationship satisfies the following calculation formula: P = K × (T - T0) Where P is power, K is the target conversion factor, T is temperature, and T0 is ambient temperature.

[0054] The temperature control method for the laser solder wire welding machine provided in this embodiment first obtains the ambient temperature based on environmental information, then calculates the target conversion factor by combining the characteristics of the welding material, process parameters, usage parameters, and heat dissipation coefficient, and finally obtains the power-temperature conversion relationship based on the ambient temperature and the target conversion factor. By comprehensively considering various factors such as ambient temperature and material characteristics and process parameters closely related to the welding process to determine the power-temperature conversion relationship, it can more accurately reflect the intrinsic relationship between laser power and solder joint temperature in the actual welding process. This accurate relationship model helps to achieve more precise temperature control, enabling the laser solder wire welding machine to dynamically adjust the power according to different environmental conditions and welding parameters, thereby significantly improving welding quality and stability, reducing welding defects caused by temperature control errors, such as cold solder joints and overheating damage, and thus improving product reliability and production efficiency.

[0055] Reference Figure 4 In one embodiment of this example, step S302, based on the characteristics of the welding material, process parameters, usage parameters, and heat dissipation coefficient, obtains the target conversion factor, including steps S401 to S404: Step S401: Obtain the thermal conductivity of the welding material based on its properties.

[0056] Specifically, in this embodiment, thermal conductivity refers to the ability of a welding material to conduct heat. Thermal conductivity is an inherent property of materials, and different materials have significantly different thermal conductivity. For example, metallic materials generally have high thermal conductivity, while ceramic materials have low thermal conductivity. In laser soldering, the thermal conductivity of the welding material directly affects the speed and distribution of heat propagation in the solder joint area.

[0057] Step S402: Based on process parameters, obtain the heat dissipation area and heat conduction path length.

[0058] Specifically, in this embodiment, the heat dissipation area refers to the effective area of ​​the weld joint in contact with the surrounding environment and exchange heat. In laser welding, the heat dissipation area mainly depends on the size and shape of the laser spot and the degree of exposure of the material around the weld joint. The larger the heat dissipation area, the faster the heat is dissipated into the environment. The heat conduction path length refers to the path length of heat from the heat source (laser spot) to the surrounding environment. The heat conduction path length is related to welding process parameters (such as laser focal length) and material properties. The longer the path, the greater the resistance in the heat conduction process, and the more obvious the temperature drop.

[0059] Step S403: Obtain the energy absorption rate based on the usage parameters and welding material characteristics.

[0060] Specifically, in this embodiment, energy absorption rate refers to the proportion of laser energy absorbed by a material. Different materials have different absorption rates of laser energy, which depends on factors such as the material's composition, surface condition, and laser wavelength. For example, metallic materials generally have a lower absorption rate for infrared lasers but a higher absorption rate for ultraviolet lasers. The higher the energy absorption rate, the more laser energy the material absorbs, and the faster its temperature rises.

[0061] Step S404: Obtain the target conversion factor based on thermal conductivity, heat dissipation area, heat conduction path length, energy absorption rate, and heat dissipation coefficient.

[0062] Specifically, the target conversion factor is the proportionality coefficient connecting the current laser power and the temperature difference (T-T0) in the power-temperature conversion relationship. The target conversion factor is a comprehensive parameter related to factors such as welding material properties, process parameters, usage parameters, and heat dissipation coefficient. Its calculation formula is as follows: in, k is the energy absorption rate. m Where is the thermal conductivity, A is the heat dissipation area, L is the heat conduction path length, and h is the heat dissipation coefficient.

[0063] The temperature control method for the laser solder wire welding machine provided in this embodiment first obtains the thermal conductivity of the welding material based on its characteristics, then obtains the heat dissipation area and heat conduction path length based on process parameters, and obtains the energy absorption rate by using parameters and welding material characteristics. Finally, the target conversion factor is calculated by combining thermal conductivity, heat dissipation area, heat conduction path length, energy absorption rate, and heat dissipation coefficient. By quantifying the key factors affecting the power-temperature conversion relationship and constructing an accurate mathematical model to calculate the target conversion factor, the heat transfer characteristics during the welding process can be more comprehensively and accurately reflected. This accurate calculation makes the power-temperature conversion relationship more consistent with the actual welding conditions, thereby achieving more precise temperature control. By accurately controlling the temperature, welding defects can be effectively reduced, welding quality and stability can be improved, and the adaptability of the laser solder wire welding machine to different materials, processes, and environments can be enhanced, thereby improving product reliability and production efficiency.

[0064] Reference Figure 5 In one embodiment of this example, step S107, based on the power-temperature conversion relationship, the first power difference, and the second power difference, obtains the corresponding adjustable temperature range, including steps S501 to S505: Step S501: Obtain the first adjustment temperature based on the power-temperature conversion relationship and the first power difference.

[0065] Specifically, in this embodiment, the first regulated temperature represents the temperature change calculated based on the first power difference through the power-temperature conversion relationship.

[0066] Step S502: Based on the real-time temperature of the solder joint and the first adjustable temperature, obtain the lowest adjustable temperature.

[0067] Specifically, in this embodiment, the lowest adjustable temperature is the lowest temperature that the solder joint can reach in real time when the laser power is reduced from the current value to the rated minimum power.

[0068] Step S503: Obtain the second adjustment temperature based on the power-temperature conversion relationship and the second power difference.

[0069] Specifically, in this embodiment, the second regulated temperature represents the temperature change calculated based on the second power difference through the power-temperature conversion relationship.

[0070] Step S504: Obtain the maximum adjustable temperature based on the real-time temperature of the solder joint and the second adjustable temperature.

[0071] Specifically, in this embodiment, the highest adjustable temperature is the highest temperature that the solder joint can reach in real time when the laser power increases from the current value to the rated maximum power.

[0072] Step S505: Obtain the adjustable temperature range based on the minimum and maximum adjustable temperatures.

[0073] Specifically, in this embodiment, the adjustable temperature range is a temperature interval consisting of the lowest adjustable temperature and the highest adjustable temperature.

[0074] The temperature control method for the laser solder wire welding machine provided in this embodiment first calculates the first adjustable temperature based on the power-temperature conversion relationship and the first power difference, and then obtains the minimum adjustable temperature by combining the real-time temperature of the solder joint; next, it calculates the second adjustable temperature based on the power-temperature conversion relationship and the second power difference, and then obtains the maximum adjustable temperature by combining the real-time temperature of the solder joint; finally, it determines the adjustable temperature range by combining the minimum and maximum adjustable temperatures. By accurately calculating the adjustable temperature range, a clear temperature boundary is provided for the adjustment of laser power, enabling the temperature control system to reasonably adjust the laser energy input within the power limit of the equipment. This not only avoids the risk of temperature runaway caused by blind adjustment, but also dynamically optimizes the temperature adjustment strategy according to the actual working conditions, significantly improving the accuracy and stability of temperature control, ensuring that the solder joint temperature is always within the range required by the process, thereby improving welding quality and product reliability.

[0075] Reference Figure 6 In one embodiment of this example, step S108, based on the adjustable temperature range and the suitable temperature of the solder joint, adjusts the current laser power, which includes steps S601 to S606: Step S601: Determine whether the suitable temperature of the solder joint is within the adjustable temperature range.

[0076] Step S602: If the suitable temperature of the solder joint is within the adjustable temperature range, adjust the current laser power based on the suitable temperature of the solder joint.

[0077] Step S603: If the suitable temperature of the solder joint is not within the adjustable temperature range, obtain the unit welding time and the current welding time.

[0078] Specifically, in this embodiment, the unit welding time is the standard time required to complete one welding operation, which is usually preset by the process parameters. In this embodiment, for a specific weld point, the unit welding time can be 5 seconds; the current welding time is the time that has lasted from the start of welding to the current moment.

[0079] Step S604: Obtain the remaining welding time based on the unit welding time and the current welding time.

[0080] Specifically, in this embodiment, the remaining welding time is the difference between the unit welding time and the current welding time.

[0081] Step S605: Obtain the unit rate of change of the real-time temperature of the solder joint.

[0082] Specifically, in this embodiment, the unit rate of change is expressed as the amount of change in the real-time temperature of the solder joint per unit time.

[0083] Step S606: Adjust the current laser power based on the remaining welding time, the unit change rate, and the suitable temperature of the weld point.

[0084] The temperature control method for the laser solder wire welding machine provided in this embodiment first determines whether the suitable temperature of the solder joint is within the adjustable temperature range. If it is within the range, the current laser power is directly adjusted based on the suitable temperature of the solder joint. If it is not within the range, the unit welding time and the current welding time are obtained, and the remaining welding time is obtained by the difference between the two. Then, the unit change rate of the solder joint temperature is obtained. Finally, the current laser power is adjusted by combining the remaining welding time, the unit change rate, and the suitable temperature of the solder joint. This case-by-case adjustment method can fully consider the actual situation in the welding process. When the suitable temperature of the solder joint is within the adjustable range, the temperature can be adjusted quickly and accurately, improving the temperature control efficiency. When the suitable temperature of the solder joint exceeds the adjustable range, the adjustment is made in combination with the remaining welding time and the temperature change rate, avoiding temperature runaway due to blind adjustment. This ensures that the laser power can be reasonably adjusted under various complex working conditions, thereby effectively improving the accuracy and stability of the solder joint temperature control and ensuring the welding quality.

[0085] Reference Figure 7In one embodiment of this example, step S606, which adjusts the current laser power based on the remaining welding time, the unit rate of change, and the suitable temperature of the weld joint, includes steps S701 to S704: Step S701: Obtain the ideal temperature change based on the remaining welding time and the unit change rate.

[0086] Specifically, the ideal temperature change is the target value of temperature change calculated based on the remaining welding time and the unit rate of change. In this embodiment, the ideal temperature change = remaining welding time × unit rate of change.

[0087] Step S702: Obtain the adjustable temperature of the solder joint based on the adjustable temperature range and the real-time temperature of the solder joint.

[0088] Specifically, the adjustable temperature of a solder joint is the difference between the real-time temperature of the solder joint and the boundary temperature within the adjustable temperature range. The adjustable temperature range has a lower boundary temperature (i.e., the lowest adjustable temperature) and an upper boundary temperature (i.e., the highest adjustable temperature), so the adjustable temperature of the solder joint also has two differences.

[0089] Step S703: Obtain the target temperature based on the adjustable temperature of the solder joint and the ideal changing temperature.

[0090] Specifically, in this embodiment, the target temperature, which is the temperature adjustment target value dynamically calculated by the laser solder wire welding machine temperature control system based on welding process requirements and equipment capabilities, can be expressed by the following formula: in, For the target temperature, This refers to the real-time temperature of the solder joint. For ideal temperature changes, Adjustable temperature for solder joints.

[0091] Step S704: If the ideal temperature change does not exceed the second temperature threshold and the target temperature does not exceed the third temperature threshold, then adjust the current laser power based on the suitable temperature of the solder joint.

[0092] Specifically, in this example, the second temperature threshold is the preset safe upper limit of temperature change, which is used to limit the maximum value of the ideal temperature change. If the ideal temperature change exceeds the second temperature threshold, it may cause temperature overshoot or equipment overload. The third temperature threshold is the preset safe upper limit of the target temperature, which is used to ensure that the target temperature is within the safe range. If the target temperature exceeds the third temperature threshold, the system will alarm and stop the welding operation.

[0093] The temperature control method for the laser solder wire welding machine provided in this embodiment first calculates the ideal temperature change based on the remaining welding time and the unit change rate when the suitable temperature of the solder joint exceeds the adjustable range. Then, it determines the adjustable temperature of the solder joint by combining the adjustable temperature range and the real-time temperature of the solder joint. The target temperature is then obtained by combining the adjustable temperature of the solder joint and the ideal temperature change. Finally, it is determined whether the ideal temperature change exceeds the second temperature threshold and whether the target temperature exceeds the third temperature threshold. If neither exceeds the threshold, the current laser power is adjusted based on the suitable temperature of the solder joint. By introducing a multi-level threshold judgment and dynamic temperature calculation mechanism, the feasibility of temperature adjustment under complex working conditions is ensured (avoiding exceeding the equipment power limit), while limiting the risk of over-adjustment (preventing excessively rapid temperature changes or overshoot), thereby achieving precise temperature control within the safety boundary. This refined control strategy significantly improves the stability and reliability of the welding process, and is especially suitable for temperature-sensitive materials or high-precision welding scenarios. It effectively reduces defects such as cold solder joints and overheating damage, and improves product yield and production efficiency.

[0094] Secondly, this application also discloses a temperature control system for a laser solder wire welding machine.

[0095] Reference Figure 8 A temperature control system for a laser soldering machine, comprising: The first acquisition module is used to acquire current operating condition information; The second acquisition module is used to acquire the real-time temperature and suitable temperature of the solder joint based on the current working condition information. The third acquisition module is used to acquire the first temperature difference based on the real-time temperature of the solder joint and the suitable temperature of the solder joint; The fourth acquisition module is used to acquire the current laser power if the first temperature difference exceeds the first temperature threshold. The fifth acquisition module is used to acquire the power-temperature conversion relationship based on operating condition information; The sixth acquisition module is used to obtain a first power difference based on the current laser power and the rated minimum power and a second power difference based on the current laser power and the rated maximum power if the current laser power is greater than the rated minimum power and less than the rated maximum power. The seventh acquisition module is used to acquire the corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference. The power adjustment module is used to adjust the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint.

[0096] Thirdly, this application discloses a smart terminal, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor loads the computer program, it executes a temperature control method for a laser solder wire welding machine as described in the above embodiment.

[0097] Fourthly, embodiments of this application disclose a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is loaded by a processor, it executes a temperature control method for a laser solder wire welding machine according to the above embodiments.

[0098] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A temperature control method for a laser solder wire welding machine, characterized in that, include: Obtain current operating condition information; Based on the current operating condition information, obtain the real-time temperature and suitable temperature of the solder joint; Based on the real-time temperature of the solder joint and the suitable temperature of the solder joint, a first temperature difference is obtained; If the first temperature difference exceeds the first temperature threshold, then obtain the current laser power; Based on the aforementioned operating condition information, the power-temperature conversion relationship is obtained; If the current laser power is greater than the rated minimum power and less than the rated maximum power, then a first power difference is obtained based on the current laser power and the rated minimum power, and a second power difference is obtained based on the current laser power and the rated maximum power; Based on the power-temperature conversion relationship, the first power difference, and the second power difference, the corresponding adjustable temperature range is obtained; Based on the adjustable temperature range and the suitable temperature of the solder joint, the current laser power is adjusted. Wherein, adjusting the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint includes: Determine whether the suitable temperature of the solder joint is within the adjustable temperature range; If the suitable temperature of the solder joint is within the adjustable temperature range, then the current laser power is adjusted based on the suitable temperature of the solder joint; If the suitable temperature of the solder joint is not within the adjustable temperature range, then obtain the unit welding time and the current welding time; Based on the unit welding time and the current welding time, the remaining welding time is obtained; Obtain the unit rate of change of the real-time temperature of the solder joint; The current laser power is adjusted based on the remaining welding time, the unit rate of change, and the suitable temperature of the weld point. The step of adjusting the current laser power based on the remaining welding time, the unit rate of change, and the suitable temperature of the weld joint includes: Based on the remaining welding time and the unit rate of change, the ideal temperature change is obtained; Based on the adjustable temperature range and the real-time temperature of the solder joint, the adjustable temperature of the solder joint is obtained; The target temperature is obtained based on the adjustable temperature of the solder joint and the ideal changing temperature. If the ideal temperature change does not exceed the second temperature threshold and the target temperature does not exceed the third temperature threshold, then the current laser power is adjusted based on the suitable temperature of the solder joint.

2. The temperature control method for a laser solder wire welding machine according to claim 1, characterized in that, The process of obtaining the power-temperature conversion relationship based on the operating condition information includes: Based on the aforementioned working condition information, the welding material type, welding machine parameters, and environmental information are obtained; Based on the type of welding material, the characteristics of the welding material are obtained; Based on the welding machine parameters, process parameters and welding usage parameters are obtained; Based on the environmental information, the heat dissipation coefficient is obtained; Based on the characteristics of the welding material, the process parameters, the welding usage parameters, and the heat dissipation coefficient, the power-temperature conversion relationship is obtained.

3. The temperature control method for a laser solder wire welding machine according to claim 2, characterized in that, The process of obtaining the power-temperature conversion relationship based on the welding material properties, the process parameters, the welding usage parameters, and the heat dissipation coefficient includes: Based on the environmental information, obtain the ambient temperature; Based on the welding material properties, the process parameters, the welding usage parameters, and the heat dissipation coefficient, the target conversion factor is obtained; Based on the ambient temperature and the target conversion factor, the power-temperature conversion relationship is obtained, and the power-temperature conversion relationship satisfies the following calculation formula: P = K × (T - T0) Where P is power, K is the target conversion factor, T is temperature, and T0 is ambient temperature.

4. The temperature control method for a laser solder wire welding machine according to claim 3, characterized in that, The process of obtaining the target conversion factor based on the welding material properties, the process parameters, the welding usage parameters, and the heat dissipation coefficient includes: Based on the properties of the welding material, the thermal conductivity of the welding material is obtained; Based on the process parameters, the heat dissipation area and heat conduction path length are obtained; The energy absorption rate is obtained based on the welding parameters and the characteristics of the welding material. Based on the thermal conductivity, the heat dissipation area, the heat conduction path length, the energy absorption rate, and the heat dissipation coefficient, a target conversion factor is obtained, which satisfies the following calculation formula: in, k is the energy absorption rate. m Where is the thermal conductivity, A is the heat dissipation area, L is the heat conduction path length, and h is the heat dissipation coefficient.

5. The temperature control method for a laser solder wire welding machine according to claim 1, characterized in that, The process of obtaining the corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference includes: Based on the power-temperature conversion relationship and the difference between the first power, the first adjustment temperature is obtained; Based on the real-time temperature of the solder joint and the first adjustable temperature, the lowest adjustable temperature is obtained; Based on the power-temperature conversion relationship and the second power difference, the second adjustment temperature is obtained; Based on the real-time temperature of the solder joint and the second adjustable temperature, the maximum adjustable temperature is obtained; The adjustable temperature range is obtained based on the lowest adjustable temperature and the highest adjustable temperature.

6. A temperature control system for a laser soldering machine, used to perform the method according to any one of claims 1 to 5, characterized in that, include: The first acquisition module is used to acquire current operating condition information; The second acquisition module is used to acquire the real-time temperature and suitable temperature of the solder joint based on the current working condition information. The third acquisition module is used to acquire a first temperature difference based on the real-time temperature of the solder joint and the suitable temperature of the solder joint; The fourth acquisition module is used to acquire the current laser power if the first temperature difference exceeds the first temperature threshold. The fifth acquisition module is used to acquire the power-temperature conversion relationship based on the operating condition information; The sixth acquisition module, if the current laser power is greater than the rated minimum power and less than the rated maximum power, is used to acquire a first power difference based on the current laser power and the rated minimum power, and to acquire a second power difference based on the current laser power and the rated maximum power; The seventh acquisition module is used to acquire the corresponding adjustable temperature range based on the power-temperature conversion relationship, the first power difference, and the second power difference; The power adjustment module is used to adjust the current laser power based on the adjustable temperature range and the suitable temperature of the solder joint.

7. A smart terminal, comprising a memory and a processor, characterized in that, The memory is used to store computer programs that can run on the processor, and when the processor loads the computer program, it executes the method of any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is loaded by the processor, it executes the method of any one of claims 1 to 5.

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