Welding temperature calibration component and calibration method

Abstract

The present application discloses a welding temperature correction component and calibration method, which relates to the field of electronic manufacturing technology, wherein the correction component includes a carrier board and a plurality of metal parts embedded and fixed on the carrier board and each provided with a temperature sensing part. The method includes: obtaining recommended parameters of the device to be tested to generate a furnace temperature calibration recommended correction curve for the device to be tested; after the correction component and the device to be tested are set accordingly, the temperatures of multiple areas of the device to be tested and the reference furnace temperature correction curve corresponding to the device to be tested are obtained, and the welding temperature calibration result of the device to be tested is generated according to the temperatures of multiple areas, the actual furnace temperature correction curve of the device to be tested and the reference furnace temperature correction curve. The technical problem that the traditional temperature measuring plate can only monitor whether the furnace temperature of the current production product is qualified and cannot monitor the heating effect of the equipment itself is solved, and the heating effect and equipment status of the equipment are monitored, which enables the factory to detect equipment abnormalities in advance and perform equipment repair and maintenance in advance.

Description

Technical Field

[0001] The present application relates to the field of electronic manufacturing technology, and in particular to a welding temperature correction component and calibration method. Background Art

[0002] In most production plants, in addition to routine annual calibration at the original manufacturer, various methods are used to conduct internal calibration of production equipment / heating equipment for maintenance anomalies that occur during actual use.

[0003] In the past, factories used a temperature-testing board to test their furnaces daily to confirm that the temperatures of the products currently being produced were within acceptable ranges. If the test temperature indicated an abnormality, factories would typically optimize the furnace temperature to adjust equipment parameters to ensure the temperature matched the product's production specifications.

[0004] However, in the related art, since the products produced every day are different, the temperature measuring plates used are also different. Therefore, the furnace temperature test at the beginning of each shift can only monitor whether the furnace temperature of the current product to be produced is qualified, but it is impossible to monitor whether the heating effect of the equipment itself has changed. In addition, equipment with abnormal furnace temperature and the situation of line switching models need to be debugged and retested for confirmation, which is a great waste of manpower and production capacity, affecting the production rhythm and production efficiency of the production line, and needs to be solved urgently. Summary of the Invention

[0005] The present application provides a welding temperature correction component and calibration method to at least solve the problems in the related art, that is, the traditional temperature measuring plate can only monitor whether the furnace temperature of the product to be produced is qualified, and cannot monitor whether the heating effect of the equipment itself has changed. In addition, equipment with abnormal furnace temperature and line switching models need to be debugged and retested for confirmation, which greatly wastes manpower and production capacity, and affects the production rhythm and production efficiency of the production line.

[0006] The present application provides a welding temperature correction component, which includes a carrier plate and multiple metal parts. The multiple metal parts are embedded and fixed in the carrier plate. Each of the metal parts is provided with a temperature sensing part, and the temperature sensing part is used to sense the temperature of the metal part.

[0007] The present application also provides a method for calibrating welding temperature, which adopts the correction component as described above, wherein the method includes the following steps: obtaining the number of temperature zones of the device to be tested, and generating recommended parameters corresponding to the basic curve parameters of the furnace temperature calibration of the device to be tested according to the number of temperature zones; generating a recommended correction curve for the furnace temperature calibration of the device to be tested based on the recommended parameters; after the correction component and the device to be tested are set accordingly, obtaining the temperatures of multiple areas of the device to be tested based on the temperatures of the metal part, and generating a reference furnace temperature calibration curve corresponding to the device to be tested based on the furnace temperature calibration recommended correction curve, so as to generate a welding temperature calibration result of the device to be tested according to the temperatures of the multiple areas, the actual furnace temperature calibration curve of the device to be tested and the reference furnace temperature calibration curve.

[0008] The present application also provides a computer program product, including: an acquisition module, used to obtain the number of temperature zones of the device under test, so as to generate recommended parameters corresponding to the basic curve parameters of the furnace temperature calibration of the device under test according to the number of temperature zones; a generation module, used to generate a recommended correction curve for the furnace temperature calibration of the device under test based on the recommended parameters; a verification module, used to obtain the temperatures of multiple areas of the device under test based on the temperature of the metal part after the correction component and the device under test are set accordingly, and generate a reference furnace temperature correction curve corresponding to the device under test based on the furnace temperature calibration recommended correction curve, so as to generate a welding temperature verification result of the device under test according to the temperatures of the multiple areas, the actual furnace temperature correction curve of the device under test and the reference furnace temperature correction curve.

[0009] The present application also provides an electronic device, comprising: a memory for storing a computer program; and a processor for implementing the steps of any of the above-mentioned welding temperature verification methods when executing the computer program.

[0010] The present application also provides a non-volatile computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned welding temperature verification methods are implemented.

[0011] Through the present application, the temperature of multiple areas of the device to be tested can be collected by using multiple metal parts of different pre-manufactured calibration components, and a certain actual furnace temperature calibration curve can be generated based on the furnace temperature calibration recommended calibration curve, so as to generate the calibration results of the welding temperature of multiple areas and multiple temperature zones of the device to be tested according to the temperature of multiple areas, the actual furnace temperature calibration curve and the reference furnace temperature calibration curve under the preset working temperature. Therefore, it can solve the problem in the related art that the traditional temperature measuring plate can only monitor whether the furnace temperature of the product to be produced is qualified, and cannot monitor whether the heating effect of the equipment itself has changed. In addition, the equipment with abnormal furnace temperature and the situation of line switching model need to be debugged and retested and confirmed, which wastes manpower and production capacity, and affects the production rhythm and production efficiency of the production line. The problem is achieved by fundamentally monitoring the heating effect and equipment status of the equipment heating device, which can enable the factory to detect equipment abnormalities in advance and perform equipment repair and maintenance in advance, avoid frequent adjustment of furnace temperature parameters during product production furnace temperature testing, waste production line production time, and improve operation efficiency and equipment utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 A schematic structural diagram of a welding temperature correction component provided in an embodiment of the present application;

[0014] Figure 2 This is a schematic diagram of the structure of a furnace temperature correction plate according to one embodiment of the present application;

[0015] Figure 3 A flow chart of a method for calibrating welding temperature provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of a test and maintenance record form according to an embodiment of the present application;

[0017] Figure 5 A schematic diagram of a calibration curve result comparison table format according to one embodiment of the present application;

[0018] Figure 6 This is a flow chart of soldering temperature calibration for reflow soldering according to one embodiment of the present application;

[0019] Figure 7 A block diagram of a computer program product provided according to an embodiment of the present application;

[0020] Reference numerals:

[0021] Among them, 10-calibration component; 100-carrier board, 200-metal part; 20-computer program product; 300-acquisition module, 400-generation module, 500-verification module. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] It should be noted that, in the description of this application, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. The terms "first," "second," etc., in this application are used to distinguish similar objects, and are not used to describe a particular order or sequence.

[0024] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Specifically, Figure 1 Schematic diagram of the structure of a welding temperature correction component 10 provided according to an embodiment of the present application.

[0026] like Figure 1 As shown, the welding temperature calibration assembly 10 includes a carrier plate 100 and multiple metal components (metal component 1, metal component 2, ..., metal component n). The multiple metal components are embedded and fixed to the carrier plate. Each metal component is equipped with a temperature sensor for sensing the temperature of the metal component. The multiple metal components are arranged in multiple rows and columns and are evenly spaced.

[0027] It's understood that soldering temperature here refers to the temperature used in soldering processes like SMT soldering and wave soldering. Soldering temperature is closely related to furnace temperature (the temperature inside the heating equipment used during the soldering process, such as reflow ovens and wave soldering ovens). Controlling the furnace temperature allows for precise soldering temperature control.

[0028] As a possible implementation method, the present application may, but is not limited to, collecting the welding temperature through a calibration component, thereby further verifying the welding temperature based on the collected results.

[0029] Among them, the correction component here can be understood as a temperature monitoring device pre-designed and manufactured for the heating equipment used during welding in the embodiment of the present application. It can also be referred to as a furnace temperature correction plate in the embodiment of the present application and subsequent processes.

[0030] Specifically, the calibration assembly includes, but is not limited to, a carrier plate 100 and multiple metal components. In this embodiment of the present application, the carrier plate 100 can be used, but is not limited to, supporting multiple metal components and other related parts. In this embodiment of the present application, the multiple metal components can be fixed to the carrier plate 100 by, but is not limited to, embedding. Furthermore, to uniformly collect temperatures from multiple areas of the heating device, the multiple metal components can be arranged in multiple rows and columns with even spacing.

[0031] Furthermore, multiple metal parts in the embodiment of the present application are also provided with temperature sensing parts, which can be used to sense the temperature of the metal parts and connected to a certain temperature monitor. Therefore, in the process of the entire calibration assembly passing through the heating device through the normal temperature measurement method of the temperature measuring plate, the multiple metal parts carried by the carrier plate 100 will change according to the temperature of the heating device. The temperature sensing parts can further sense the temperature of the multiple metal parts, thereby transmitting the temperature to the corresponding temperature monitor.

[0032] For example, Figure 2 This is a schematic diagram of the structure of a furnace temperature correction plate according to an embodiment of the present application. Figure 2 As shown, the carrier board of the furnace temperature correction board is a rectangular carrier board with FR4 substrate as the basic material and 20 layers of copper foil. The length can be but not limited to 500 mm, the width can be but not limited to 430 mm, and the thickness can be but not limited to 5.5 mm.

[0033] It should be noted that the length, width and height dimensions are mainly designed for motherboard production line equipment. In actual application, professional and technical personnel in this technical field can make adaptive size adjustments based on the actual motherboard production line equipment. The embodiments of this application are only for illustrative purposes and are not specifically limited.

[0034] Furthermore, the embodiment of the present application can also be but not limited to inlaying 9 5*4*2 mm copper plates (metal parts) on the rectangular carrier board, and these nine copper plates can be evenly spaced in 3 rows and 3 columns.

[0035] Furthermore, each of the nine copper plates has a temperature sensor attached to the center. The temperature sensor can be secured to the copper plate using, but is not limited to, thermal adhesive. The temperature sensor can be routed through, but is not limited to, pre-reserved grooves on the carrier board, extending to the end of the carrier board and then secured. The temperature sensor plug should have a 300mm length to facilitate connection to a temperature monitor.

[0036] It should be noted that the nine copper plates in the embodiment of this application are for illustrative purposes only, and the number of metal parts is not limited to this. If you want to understand the device under test more accurately, you can increase the number of metal parts appropriately. However, for cost control and the characteristics of general devices under test, the preferred number of metal parts is nine.

[0037] Additionally, embodiments of the present application can also pre-set a board direction indicator on any edge of the furnace temperature calibration board to ensure that the board direction is the same each time it is used. That is, each time the furnace temperature calibration board passes through a reflow oven, wave crest oven, or other testing equipment, the entry and exit directions must remain consistent.

[0038] It should be noted that in order to ensure the effectiveness of the furnace temperature calibration plate, it is recommended to replace it regularly after a usage period of 100 times. That is, when the furnace temperature calibration plate has been used 100 times, it is recommended to re-make the temperature calibration plate to ensure that the thermal conductivity of the furnace temperature calibration plate itself will not affect the welding temperature calibration results due to long-term use.

[0039] In this embodiment, a dedicated calibration component 10 can be designed to collect the welding temperature of the heating device during welding. Metal components, such as copper plates, are used as temperature monitoring points to ensure that the calibration component 10 closely simulates the actual product form. Furthermore, through the use of multiple metal components, temperature sensors, and a specific configuration, the temperature of different areas within the heating device can be collected while ensuring the accuracy of the temperature collection results.

[0040] Optionally, in one embodiment of the present application, the multiple metal parts include multiple first metal parts and multiple second metal parts, the multiple first metal parts are arranged in a rectangular shape, second metal parts are provided between adjacent first metal parts in the first direction, and multiple second metal parts are provided between two adjacent rows of first metal parts in the second direction, and the multiple second metal parts have at least one through hole formed on the carrier, and the at least one through hole is arranged around the second metal part.

[0041] Based on the relevant descriptions of other embodiments, it can be understood that the correction component 10 in the present application includes but is not limited to a carrier board 100 and multiple metal parts. On the basis of the multiple metal parts being arranged in multiple rows and columns and evenly spaced, the present application can also further set the inlaying method of the multiple metal parts and the connection method thereof with the carrier board 100.

[0042] In certain embodiments, the present application may, but is not limited to, dividing multiple metal parts into first metal parts and second metal parts, wherein the first metal parts may be arranged in a rectangular shape and set on the carrier 100, and the second metal parts may be respectively set on the carrier between the first metal parts adjacent in the first direction and the first metal parts adjacent in the second direction.

[0043] Moreover, the second metal component is formed with at least one through hole on the carrier board, and the through holes are arranged around the second metal component.

[0044] The first direction here can be understood as the oblique direction formed by connecting the diagonal corners of the rectangle, and the second direction here can be understood as the positive direction formed by two points on the same side of the rectangle.

[0045] Based on this, when the first metal parts are distributed in a rectangular pattern, the temperatures of different locations on the device under test can be collected separately, and the temperature of a certain edge of the device under test can be collected by using any two first metal parts. Furthermore, by collecting the temperature of the second metal part placed between the first metal parts, the temperature of the central area of ​​the device under test can be measured (the plane formed by the inlet / outlet is used as the reference plane, and the sum of the central areas of each plane parallel to the reference plane in the device under test is called the central area of ​​the device under test, rather than a certain area formed by multiple planes of the device under test parallel to the reference plane). When determining the temperature of a certain edge of the device under test, the temperature collected by the second metal part can be combined to determine the temperature, which helps to improve the accuracy of temperature detection.

[0046] Still Figure 2 For example, the embodiment of the present application may be but is not limited to Figure 2 The four copper plates No. 1, No. 3, No. 7, and No. 9 are arranged in a rectangular shape as the first metal parts at the four corners of the carrier 100. Among them, copper plates No. 1 and No. 9 and copper plates No. 3 and No. 7 can be understood as adjacent in the first direction, and No. 1 and No. 3, No. 3 and No. 9, No. 9 and No. 7, and No. 7 and No. 1 can be understood as adjacent in the second direction; the bottom of the inlay area is not dug through, and a thickness of 3.5 mm is retained.

[0047] In this way, Figure 2 For example, when the calibration component is transferred into the device under test for temperature measurement, sensors 1, 3, 7, and 9 can each collect the temperature of different areas of the device under test, making it easier to understand the conditions in each area of ​​the device under test. Furthermore, sensors 1 and 3, 3 and 9, 9 and 7, and 7 and 1 can each measure the temperature of each edge of the test area. The specified orientation allows the calibration component in this embodiment of the present application to effectively simulate the temperature changes along each edge of a board or other product as it enters and exits the device under test.

[0048] For example, during the board production process, the board edge of the advanced device to be tested will heat up first. At the same time, the board edge of the advanced device to be tested will also cool down first and exit the device to be tested first. The welding temperature to which each board edge of the product is subjected when entering and exiting the device to be tested and when passing through the same area may be different. The setting of the first metal part in the embodiment of the present application can effectively simulate the actual production process of the product and collect the actual welding temperature to which different areas of the product are subjected during the actual production process.

[0049] Furthermore, considering that during the actual soldering process, products such as boards have front and back sides, and the different temperatures experienced by the top and bottom sides can cause the actual temperature of a particular point on the product to differ from both the front and back sides, embodiments of the present application can include at least one through-hole formed on the carrier board of the second metal member, with these through-holes arranged around the second metal member. Through these through-holes, air can circulate between the front and back sides of the calibration assembly, ensuring that the temperature measured on the second metal member closely approximates the soldering temperature experienced by the corresponding area during actual product production.

[0050] Moreover, the second metal piece is arranged between the first metal pieces, which can not only collect the temperature of the central area of ​​the product during the actual production process, but also improve the accuracy of the temperature measurement of a certain edge of the product.

[0051] like Figure 2 As shown, Figure 2 The other five copper plates No. 2, No. 4, No. 5, No. 6, and No. 8 can be used as second metal parts in this application, and are respectively arranged between the first metal part No. 1 and the first metal part No. 9 (or the first metal part No. 3 and the first metal part No. 7) adjacent to each other in the first direction, and between the first metal part No. 1 and the first metal part No. 3, the first metal part No. 1 and the first metal part No. 7, the first metal part No. 3 and the first metal part No. 9, and the first metal part No. 7 and the first metal part No. 9 adjacent to each other in the second direction.

[0052] The five copper plates No. 2, 4, 5, 6 and 8 in the embodiment of the present application can also be fixed on the carrier 100 by inlaying, and the inlay depth is the same as that of the other four copper plates; however, unlike the four copper plates No. 1, 3, 7 and 9, the inlay areas of the five copper plates No. 2, 4, 5, 6 and 8 have 10mm through holes on all sides, that is, the four white areas around the five copper plates No. 2, 4, 5, 6 and 8. In order to ensure the stability of the five copper plates, the embodiment of the present application can connect the inlay area to the carrier through reinforcing ribs between each through hole.

[0053] In summary, if Figure 2 As shown, No. 1, No. 2, No. 3; No. 4, No. 5, No. 6; No. 7, No. 8, No. 9; and No. 1, 4, 7; No. 3, 6, 9 can respectively simulate one edge of the product to measure the actual soldering temperature inside the device under test; No. 2, 5, and No. 8 can simulate the midpoint area of ​​the product edge and the center area of ​​the entire product to collect the actual soldering temperature in the center area of ​​the device under test.

[0054] It should be noted that the nine copper plates and their arrangement in the embodiment of this application are for illustrative purposes only. Different numbers of metal parts correspond to different arrangements, and the present invention is not limited thereto. The nine copper plates and their arrangement examples in the embodiment of this application are preferred. Professionals skilled in the art can determine the specific arrangement of multiple metal parts and the connection method between different metal parts and corresponding carrier boards based on actual conditions and actual needs. The embodiment of this application is for illustrative purposes only and does not impose specific limitations.

[0055] The embodiments of the present application further provide a method for verifying welding temperature, and the method is described in detail in conjunction with the execution flow of the method for verifying welding temperature.

[0056] Specifically, Figure 3 The present invention provides a flow chart of a method for calibrating welding temperature according to an embodiment of the present application.

[0057] like Figure 3 As shown, the welding temperature calibration method uses a welding temperature calibration component, wherein the method includes the following steps:

[0058] In step S301 , the number of temperature zones of the device under test is obtained, so as to generate recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the device under test according to the number of temperature zones.

[0059] In the production process of server product motherboards, SMT soldering and wave soldering are the top priorities of the entire production process, which are related to the product soldering quality and product reliability. The SMT reflow oven and wave soldering oven are responsible for the soldering of SMT components and plug-in components respectively. Therefore, the temperature stability of the SMT reflow oven and wave soldering oven has become a key control indicator in the SMT production process.

[0060] In some embodiments, the present application can monitor the welding temperature by monitoring the furnace temperature of the device under test, thereby achieving welding temperature calibration by calibrating the furnace temperature. The device under test here can be understood as a heating device such as a reflow oven or a wave soldering oven that can implement soldering processes such as SMT soldering and wave soldering, that is, the heating device in which the soldering process occurs.

[0061] In the process of realizing temperature monitoring of the device under test, for example, to timely understand the heating effect of the device under test, the embodiment of the present application can, but is not limited to, use a welding temperature correction component to perform temperature monitoring on the device under test.

[0062] When calibrating the furnace temperature, i.e., the welding temperature, of the device under test, in order to ensure adaptation to different devices under test, the embodiment of the present application can first determine the recommended parameters corresponding to the furnace temperature calibration basic curve parameters of different devices under test according to the number of temperature zones of the device under test.

[0063] The "number of temperature zones" refers to the number of independently controlled heating sections within equipment such as reflow ovens, which directly impacts the heating uniformity and temperature gradient control accuracy of the heating equipment. The "furnace temperature calibration basic curve parameters" here can be understood as the calibration parameters required for the device under test, such as "temperature zone 1 calibration parameters," "temperature zone 2 calibration parameters," and so on. Recommended parameters can be understood as specific values ​​recommended for the furnace temperature calibration basic curve parameters for different devices under test. These recommended parameters provide specific values ​​for each parameter within the furnace temperature calibration basic curve parameters.

[0064] It should be noted that the furnace temperature calibration basic curve parameters are calibration parameters applicable during furnace temperature calibration, not furnace temperature parameters applicable during product production.

[0065] For example, a 4-zone device has a wide temperature span, which can lead to large temperature differences between adjacent zones and a wide temperature fluctuation range during heating. Therefore, four recommended parameters can be set for each of the four zones, such as 150°C, 175°C, 200°C, and 225°C. An 8-zone device, on the other hand, has more subdivided temperature zones, enabling more precise segmented temperature control and more uniform heating. However, it requires higher temperature stability in each zone, so eight corresponding temperature zone monitoring points can be set, corresponding to eight recommended parameters, such as 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, and 225°C.

[0066] It should be noted that, in actual application, the specific value of each recommended parameter should be determined by professional and technical personnel in this technical field according to the actual situation of the device to be tested and the temperature zone. The embodiments of this application are only for illustrative purposes and are not specifically limited.

[0067] The embodiment of the present application can determine the recommended parameters of the device to be tested based on the number of temperature zones of the device to be tested, and can effectively be compatible with multiple types or the same type but multiple specifications of heating equipment in the target factory, which helps to realize welding temperature monitoring and calibration of multiple devices to be tested.

[0068] Optionally, in one embodiment of the present application, recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the equipment to be tested are generated according to the number of temperature zones, including: obtaining the welding parameter characteristics of key consumables of the equipment to be tested during the production process; and determining the recommended parameters based on the welding parameter characteristics of the key consumables, the number of temperature zones, and the temperature difference control performance of the equipment to be tested between different temperature zones.

[0069] During the actual implementation process, when determining the recommended parameters of the target factory based on the number of temperature zones of the equipment to be tested, in addition to considering the impact of the number of temperature zones, this application can also combine the welding parameter characteristics of key consumables of the equipment to be tested in the production process and the temperature difference control performance of the equipment to be tested between different temperature zones to further determine the recommended parameters of the equipment to be tested.

[0070] For example, for key consumables such as solder paste, solder pastes containing different alloy components have different melting points. The melting of solder paste requires a specific furnace temperature. A furnace temperature below the melting point may easily cause the solder paste to not fully melt, while a furnace temperature above the melting point may cause component oxidation or damage to the pad. Therefore, when calibrating the soldering temperature, the peak temperature of the recommended parameters must be higher than the melting point of the solder paste, that is, the constant temperature section temperature of the recommended parameters (the recommended parameters corresponding to the constant temperature section temperature) must allow the solder paste to be fully activated.

[0071] For example, if a solder paste requires activation at a constant temperature of 180°C for 60 seconds, the recommended constant temperature range can be set within a certain range of this value to ensure that the soldering temperature verification results are consistent with the actual production requirements.

[0072] In addition, the temperature difference control performance of the device under test between different temperature zones also has a significant impact on the calibration of the welding temperature. If the temperature difference control performance of the device under test is poor, for example, the previous temperature zone is 100°C and the next temperature zone suddenly reaches 150°C, the recommended parameters can appropriately reduce the heating rate between these two temperature zones to avoid the sudden temperature change affecting the calibration accuracy.

[0073] Based on this, the embodiments of the present application can determine recommended parameters by combining, but not limited to, the welding parameter characteristics of key consumables in the production process of the equipment to be tested, the number of temperature zones of different equipment to be tested, and the temperature difference control performance of the equipment to be tested between different temperature zones.

[0074] For example, Table 1 is a recommended parameter table of an embodiment of the present application, which can be expressed as follows:

[0075]

[0076] The recommended parameters in Table 1 take into account the DUT's ability to manage temperature differences between different temperature zones, the number of temperature zones for each DUT, and the soldering parameters of the key consumables (solder paste) used during the DUT's production process. The chain speed corresponds to the speed at which the chain enters and exits the DUT during actual product production.

[0077] The embodiments of the present application can determine recommended parameters based on the welding parameter characteristics of key consumables in the production process of the equipment to be tested, the number of temperature zones of different equipment to be tested, and the temperature difference control performance of the equipment to be tested between different temperature zones. The optimal recommended parameters for different equipment to be tested can be determined by considering multiple aspects such as consumable characteristics, temperature requirements, and temperature difference control.

[0078] Step S302: generating a furnace temperature calibration recommendation correction curve for the device under test based on the recommended parameters.

[0079] In other embodiments, after the recommended parameters of the device under test are determined, the present application can generate a recommended furnace temperature calibration correction curve for the device under test based on the furnace temperature calibration basic curve parameters corresponding to the recommended parameters.

[0080] Among them, the furnace temperature calibration recommended correction curve here can be understood as a standard temperature change curve generated based on the recommended parameters, which can reflect the temperature change information of the device under test in different temperature zones, and thus can be used as a calibration method for the device under test.

[0081] In the embodiments of this application, the recommended correction curve for oven temperature calibration is generated primarily, but not limited to, based on the RSS (Ramp-Soak-Spike) curve. The RSS curve is a nonlinear temperature curve encompassing four temperature zones: preheating, constant temperature, reflow, and cooling. It is suitable for products with large board areas, large thermal capacitance differences between PCBs and components, and high requirements for flux residue or the need to reduce flux residue.

[0082] The RSS curve is characterized by rapid temperature rise, long hold time, and rapid soldering entry. The curve exhibits a "saddle" shape, characterized by rising, flat, and peaking features. For example, when plotting the recommended parameters corresponding to the basic furnace temperature calibration curve, the horizontal axis represents time, and the vertical axis represents the temperatures of the four temperature zones: preheating, hold time, reflow, and cooling. The curve first shows a uniform temperature rise (Ramp), then a hold time (Soak), and finally a peak temperature (Spike). This provides intuitive guidance for furnace temperature calibration operations, helps control temperature differences between components, and reduces residual flux after soldering.

[0083] It should be noted that the four temperature zones of preheating, constant temperature, reflow and cooling in this application are mainly large temperature zones divided according to the physical and chemical changes of the solder paste material during welding, the thermal response characteristics of the components and the substrate, and the reliability requirements of the welding process. In the actual process, each of the four large temperature zones of preheating, constant temperature, reflow and cooling can contain multiple small temperature zones, and each small temperature zone can also be set with corresponding recommended parameters. Then, the multiple small temperature zones belonging to the four large temperature zones of preheating, constant temperature, reflow and cooling and their corresponding recommended parameters respectively form the furnace temperature calibration recommendation correction curves corresponding to the four large temperature zones of preheating, constant temperature, reflow and cooling. Finally, the final furnace temperature calibration recommendation correction curve is formed by the furnace temperature calibration recommendation correction curves corresponding to these four large temperature zones.

[0084] Taking the three temperature zones 1, 2, and 3 in Table 1 corresponding to the preheating zone, the four temperature zones 4, 5, 6, and 7 corresponding to the constant temperature zone, the four temperature zones 8, 9, 10, and 11 corresponding to the reflow zone, and 11, 12, and 13 corresponding to the cooling zone as an example, the embodiment of the present application can use time as the horizontal axis and temperature as the vertical axis. The furnace temperature calibration recommended correction curve should be connected by a curve at points (time 1, 120), (time 2, 140), (time 3, 150), (time 4, 165), (time 5, 170), (time 6, 190), (time 7, 235), (time 8, 245), (time 9, 255), (time 10, 265), (time 11, 260), (time 12, 250), and (time 13, 230), respectively. The entire curve is a "saddle" shape, first increasing the temperature at a uniform rate (Ramp), then maintaining a constant temperature (Soak), then rising to a peak (Spike), and finally dropping to a certain temperature.

[0085] Additionally, if the device under test primarily produces small-area PCBs, embodiments of the present application may, but are not limited to, generate a recommended furnace temperature calibration curve based on an RTS (Ramp-To-Spike) curve. The RTS curve setting can account for the factory-set functional settings of each temperature zone of the device and simulate the temperature rise range of each zone during actual product production, ensuring that the device's actual operating performance can be covered and monitored without exacerbating heating losses due to improper temperature design.

[0086] The embodiment of the present application can generate a recommended correction curve for the furnace temperature calibration of the device under test based on the recommended parameters corresponding to the basic curve parameters of the furnace temperature calibration of the device under test. Through a graphical curve, abstract physical parameters such as temperature and time that determine the welding quality in the reflow soldering process (such as 230°C peak value and 60 seconds constant temperature) are converted into a dynamic process, which is easier for the staff of the device under test to understand and improves the simplicity of welding temperature calibration.

[0087] Step S303: After the calibration component and the device under test are set up accordingly, the temperatures of multiple areas of the device under test are obtained based on the temperature of the metal part, and a reference furnace temperature calibration curve corresponding to the device under test is generated based on the furnace temperature calibration recommended calibration curve, so as to generate a welding temperature calibration result of the device under test based on the temperatures of multiple areas, the actual furnace temperature calibration curve of the device under test, and the reference furnace temperature calibration curve.

[0088] As a possible implementation method, the embodiment of the present application can generate a reference furnace temperature calibration curve corresponding to the device under test based on the furnace temperature calibration recommended calibration curve. The reference furnace temperature calibration curve here can be understood as a reference calibration curve used when calibrating the welding temperature of the device under test.

[0089] Then, in actual application, the embodiment of the present application can generate a calibration result of the welding temperature of the device under test based on the temperatures of multiple areas of the device under test determined by the temperature of the metal part, the actual furnace temperature correction curve and the reference furnace temperature correction curve.

[0090] Among them, multiple areas here can refer to any multiple areas from the inlet to the outlet in the device under test, including but not limited to a certain position point, a certain edge, and a certain area (such as corresponding to different temperature zones). The number and location of the areas can be determined by professional and technical personnel in this technical field based on actual application scenarios and actual application requirements. For example, temperature zone 7 of the device under test is located in the middle section of the device under test, etc.

[0091] In addition, the actual furnace temperature correction curve here can be understood as a correction curve generated by combining the different temperatures collected when multiple metal parts of the calibration component pass through multiple temperature zones of the equipment under test during the actual application of the equipment under test into the curve form of the furnace temperature calibration recommended correction curve, that is, the actual operating temperature parameters of multiple temperature zones of the equipment under test are substituted into the correction curve formed by the furnace temperature calibration recommended correction curve.

[0092] Furthermore, in order to fully utilize the multiple metal parts of the calibration component to fully understand the situation of the equipment to be tested, the embodiment of the present application can, but is not limited to, use different metal parts on the calibration component as temperature measurement points to compare the difference between the actual furnace temperature calibration curve and the reference furnace temperature calibration curve.

[0093] That is, when metal parts at different positions in the calibration component pass through multiple temperature zones of the device under test, the temperatures collected may be different. In the embodiment of the present application, the corresponding actual furnace temperature calibration curve can be generated based on the temperatures collected when a single metal part passes through multiple temperature zones of the device under test, and then the actual furnace temperature calibration curve can be compared with the corresponding reference furnace temperature calibration curve of the single metal part in the same device under test to obtain the calibration result of the welding temperature.

[0094] For example, if Figure 2As shown, metal parts 1, 2, ..., and 9 are located at different positions on the calibration assembly, and the temperatures collected when they pass through different temperature zones of the device under test are different. After metal part 1 passes through multiple temperature zones of the device under test, an actual furnace temperature calibration curve 1 can be generated. After metal part 2 passes through multiple temperature zones of the device under test, an actual furnace temperature calibration curve 2 can be generated. After metal part 9 passes through multiple temperature zones of the device under test, an actual furnace temperature calibration curve 9 can be generated. Therefore, the present application can comprehensively determine the calibration result of the welding temperature of the device under test by the difference between the actual furnace temperature calibration curve 1, the actual furnace temperature calibration curve 2, ..., and the actual furnace temperature calibration curve 9 and their corresponding reference furnace temperature calibration curves. If there is a difference between any of the actual furnace temperature calibration curves 1, 2, ..., and 9 and the corresponding reference furnace temperature calibration curve, the metal part corresponding to the actual furnace temperature calibration curve with the difference and the position of the metal part in the curve with the difference can be used to determine that the welding temperature calibration result is abnormal and the corresponding fault location of the device under test is determined.

[0095] It should be noted that the difference judgment condition between the actual furnace temperature calibration curve and the corresponding reference furnace temperature calibration curve can be experimentally calibrated or otherwise adjusted by professional and technical personnel in this technical field according to the actual situation of the equipment to be tested and the actual calibration requirements. That is, the difference between the actual furnace temperature calibration curve and the corresponding reference furnace temperature calibration curve can be determined to be abnormal in the welding temperature calibration result. For example, if the peak temperature difference in the constant temperature zone is greater than ±3%, it can be determined that the welding temperature calibration result is abnormal. The embodiments of the present application are only illustrative and not specifically limited.

[0096] For example, if the actual furnace temperature calibration curve 1 shows an abnormality in temperature zone 6 of the constant temperature zone and exceeds 3%, it can be determined that there is a problem in temperature zone 13 of the device under test and the corresponding device area.

[0097] It should also be noted that the specific conditions for determining whether the welding temperature is abnormal can also be determined by professionals in this technical field based on actual application requirements. Figure 2 In actual application, 3, 6, and 9 will measure the temperature of temperature zone 1 and the corresponding same position in the equipment to be tested at different times. If there is an abnormality in the actual furnace temperature correction curve 3, but there is no abnormality in the actual furnace temperature correction curve 6 and the actual furnace temperature correction curve 9, professional and technical personnel in this technical field can determine that there is no abnormality in temperature zone 1 and its corresponding position based on the abnormality ratio, or they can determine as before that once there is an abnormality in the actual furnace temperature correction curve, that is, if there is an abnormality in the actual furnace temperature correction curve 3 here, it is determined that there is an abnormality in temperature zone 1 and its corresponding position.

[0098] In addition, the method of using the furnace temperature correction plate in the embodiment of the present application is the same as that of a general temperature measuring plate. After the correction component and the device to be tested are set accordingly, it is only necessary to connect the temperature sensing parts of the multiple metal parts in the correction component to the temperature collector. Then, it is only necessary to collect the temperature of each area of ​​the device to be tested in real time through the temperature collector, so that the heating effect of the device to be tested can be understood in real time. This helps the operators of the device to be tested to promptly understand the working conditions of each part of the device to be tested, discover equipment abnormalities in advance, facilitate timely equipment repair and maintenance, and avoid frequent adjustment of furnace temperature parameters during product production furnace temperature testing.

[0099] At the same time, the embodiment of the present application can also set the furnace temperature calibration recommendation correction curve as a program in the device to be tested, so that the temperature monitoring terminal connected to the correction component can directly output the real-time working status of the device to be tested in the form of the furnace temperature calibration recommendation correction curve to obtain the actual furnace temperature correction curve.

[0100] The embodiments of the present application can obtain the actual furnace temperature calibration curve of the device under test during actual operation, thereby understanding the operating status of the device under test in different temperature zones and in various areas between different temperature zones, and thus understanding the heating effect of the device under test, rather than simply obtaining the furnace temperature of the device under test. This fundamentally enables monitoring of the heating effect and device status of the device under test. Furthermore, by comparing the actual furnace temperature calibration curve of the device under test with the reference furnace temperature calibration curve, a calibration result for the welding temperature of the device under test is generated, which helps the operator of the device under test to perform timely maintenance on the device under test.

[0101] Optionally, in one embodiment of the present application, a reference furnace temperature correction curve corresponding to the equipment to be tested is generated based on the furnace temperature calibration recommended correction curve, including: collecting working data of the equipment to be tested under the target working state; generating a reference furnace temperature correction curve based on the working parameters corresponding to the furnace temperature calibration basic curve parameters in the working data and the furnace temperature calibration recommended correction curve.

[0102] Based on the relevant descriptions of other embodiments, it can be understood that the present application can use the reference furnace temperature correction curve as the standard reference curve to observe whether there is any abnormality in the actual furnace temperature correction curve of the device under test, thereby generating a welding temperature calibration result for the device under test.

[0103] In actual implementation, when the present application generates a reference furnace temperature correction curve corresponding to the device under test based on the furnace temperature calibration recommended correction curve, the reference furnace temperature correction curve is generated when the device under test is in a target working state.

[0104] The target working state here can be understood as the calibrated working state of the device under test, which can enable the device under test to achieve a comprehensive state of temperature stability, time continuity and consistency of operating parameters before formal testing.

[0105] Because the device under test cannot completely reach the standard temperature of each temperature zone during actual operation, there will be some fluctuations. Therefore, even if the device under test operates under the target working conditions, the obtained calibration curve cannot be completely identical to the recommended calibration curve for furnace temperature calibration under the recommended parameters. This is because the recommended calibration curve for furnace temperature calibration corresponds to the recommended parameters, which provide the most appropriate temperature calibration points (corresponding time-temperature or temperature zone-temperature). Therefore, the recommended calibration curve for furnace temperature calibration can also be understood as the operating curve of the device under ideal conditions.

[0106] Based on this, the embodiment of the present application needs to first collect the actual furnace temperature calibration recommendation correction curve of the device under test in the calibrated working state as the reference furnace temperature correction curve to ensure that the reference furnace temperature correction curve can reflect the actual performance of the device.

[0107] Among them, the target working state and the calibration temperature corresponding to the target working state, the preset time-temperature curve, etc. can be determined by the calibration data given when the equipment to be tested leaves the factory, or can be determined by professional and technical personnel in this technical field based on the standard working state of the equipment to be tested and actual needs. The embodiments of this application are only for illustrative purposes and are not specifically limited.

[0108] For example, the manual of the device under test specifies the number of optimal temperature zones as 8-10, among which the optimal temperature of preheating zone A is 150°C. However, in actual application, a factory only needs to divide it into 4-6 temperature zones. In this case, the optimal operating temperature corresponding to preheating zone A may be slightly higher. In this case, the calibration temperature in the corresponding target operating state can be determined based on the operating temperature when the device under test is divided into 4-6 temperature zones.

[0109] Therefore, after collecting the working data of the equipment to be tested in the target working state, the embodiment of the present application can combine the working parameters corresponding to the furnace temperature calibration basic curve parameters in the working data into the furnace temperature calibration recommended correction curve to generate a reference furnace temperature correction curve.

[0110] The embodiment of the present application can use the working calibration curve of the device to be tested under the target working state as the reference furnace temperature calibration curve, thereby ensuring that the heating performance of the equipment after operation and maintenance remains consistent with the initial equipment installation, and thereby ensuring the consistency of the heating characteristics of the equipment itself.

[0111] Optionally, in one embodiment of the present application, the temperatures of multiple areas of the device to be tested are obtained based on the temperature of the metal part, including: based on the temperature of the metal part, determining the local temperatures corresponding to the fixed edge, movable edge, track center, board entry edge and board exit edge of the device to be tested; determining the temperatures of multiple areas of the device to be tested according to the local temperatures corresponding to the fixed edge, movable edge, track center, board entry edge and board exit edge of the device to be tested.

[0112] Based on the relevant descriptions of other embodiments, it can be understood that the welding temperature correction component in the embodiment of the present application contains multiple metal parts, and the metal parts contain temperature sensing parts for sensing the temperature of the metal parts.

[0113] In some embodiments, when determining the working data of the device under test in the target working state, the temperature of the metal part sensed by the temperature sensing component can be used to determine the local temperatures corresponding to the fixed edge, movable edge, track center, board entry edge and board exit edge of the device under test.

[0114] The embodiment of the present application can use the temperatures of these metal parts distributed in different areas of the correction component carrier to respectively determine the local temperatures corresponding to the fixed edge, movable edge, track center, board entry edge and board exit edge of the device under test, thereby realizing all-round temperature monitoring of the fixed edge, movable edge, track center, board entry edge and board exit edge of the device under test, effectively improving the reliability of the working data of the device under test.

[0115] Optionally, in one embodiment of the present application, a welding temperature verification result of the device to be tested is generated based on the temperatures of multiple areas, the actual furnace temperature correction curve of the device to be tested, and the reference furnace temperature correction curve, including: based on the temperatures of multiple areas, obtaining the actual fixed side temperature, actual movable side temperature, actual track center temperature, actual board entry side temperature, and actual board exit side temperature of the device to be tested; if the difference between at least one of the actual fixed side temperature, the actual movable side temperature, the actual track center temperature, the actual board entry side temperature, and the actual board exit side temperature and the corresponding reference temperature is within the corresponding target temperature variation range, then determining that the welding temperature verification result is that there is no abnormality in the welding temperature; otherwise, determining that there is an abnormality in the welding temperature.

[0116] In some embodiments, when determining the welding temperature verification result of the device to be tested, in addition to determining the welding temperature verification result by comparing the temperature collected at each temperature measuring point of the correction component, that is, by comparing the actual furnace temperature correction curves corresponding to multiple metal parts, the present application can also utilize the characteristics of the correction component in the present application to determine the welding temperature verification result by comparing the actual fixed edge temperature, actual movable edge temperature, actual track center temperature, actual board entry edge temperature and actual board exit edge temperature of the device to be tested with the corresponding reference temperatures one by one.

[0117] The actual fixed side temperature, actual movable side temperature, actual track center temperature, actual board entry side temperature, and actual board exit side temperature refer to the regional temperatures corresponding to the fixed side, movable side, track center, board entry side, and board exit side, respectively, when the product actually enters and exits the device under test, as determined by the temperature of the metal parts.

[0118] The corresponding reference temperature refers to the reference fixed edge temperature, reference movable edge temperature, reference track center temperature, reference board entry edge temperature and reference board exit edge temperature that the device under test should have when it is in the target working state. The calibration component also needs to be used to collect the temperature when the device under test is in the target working state.

[0119] For example, Figure 2 The edge formed by metal parts No. 7, No. 8 and No. 9 is the board-entry edge, then the actual board-entry edge temperature and the reference board-entry edge temperature can be determined by the average values ​​of the temperatures of metal parts No. 7, No. 8 and No. 9 collected by the calibration component when the device under test is in actual working state and calibrated working state, respectively.

[0120] Furthermore, considering that the device under test has a certain allowable fluctuation range during operation, that is, when the device under test operates within this allowable fluctuation range, the furnace temperature may fluctuate but will not affect the welding effect. Therefore, when making comparisons, the embodiments of the present application can determine the welding temperature calibration result based on the difference between the temperature of each area of ​​the device under test corresponding to the actual furnace temperature calibration curve and the temperature of each area of ​​the device under test corresponding to the reference furnace temperature calibration curve, and the first target range.

[0121] The target temperature range here can be understood as the allowable temperature fluctuation range for various areas of the device under test (e.g., fixed side, movable side, track center, board entry edge, and board exit edge). For example, ±5°C, ±10°C, etc. It should be noted that the specific target temperature range can be determined based on the actual conditions of the device under test, the production product, and the specific area of ​​the device under test. This embodiment of the present application is for illustrative purposes only and does not impose any specific limitations.

[0122] If the differences between the actual fixed side temperature, actual movable side temperature, actual track center temperature, actual board entry side temperature and actual board exit side temperature of the equipment under test and the corresponding temperatures in the reference furnace temperature calibration curve are all within the corresponding target temperature variation range, then the welding temperature calibration result is determined to be normal.

[0123] If the difference between the temperature of any area in the data of the actual fixed side temperature, actual movable side temperature, actual track center temperature, actual board entry side temperature and actual board exit side temperature of the equipment under test and the temperature of the corresponding area in the reference furnace temperature calibration curve is not within the corresponding target temperature change range, it is determined that the welding temperature is abnormal.

[0124] For example, in a reflow oven for soldering circuit boards, the solder paste is required to melt at a temperature above 183°C, the set temperature of the active edge is 190°C, and the target temperature variation range of the active edge is allowed to fluctuate within ±5°C (i.e., the temperature of the active edge is considered normal within the range of 185°C to 195°C).

[0125] If the actual active side temperature of the device under test is 188°C (2°C lower than the standard temperature of 190°C), but the difference of 2°C is within the allowable fluctuation of ±5°C, then although the actual active side temperature of the device under test is lower than the standard, the difference between the two does not exceed the target temperature variation range of the active side and will not affect the melting of the solder paste. Therefore, there is no abnormality in the soldering temperature calibration (passed).

[0126] If the actual active side temperature of the device under test is 184°C, which is 6°C away from the set temperature of 190°C and exceeds the target active side temperature range of ±5°C, this may result in insufficient solder paste melting and a cold joint. In this case, the soldering temperature calibration result will be abnormal (failed). If the soldering temperature calibration result fails, the device under test needs to be maintained promptly to ensure normal soldering temperatures.

[0127] The embodiment of the present application can determine whether the welding temperature of each temperature measurement point, that is, each area of ​​the device under test, is normal based on the difference between the actual furnace temperature calibration curve of the device under test and the reference furnace temperature calibration curve. It can accurately locate the abnormal welding temperature area and the normal welding temperature area, which helps users to quickly locate the problem area. In addition, the embodiment of the present application provides a certain allowable fluctuation range. As long as the fluctuation does not affect welding, there is no need to frequently stop the machine for calibration, which can effectively improve the production efficiency of the product.

[0128] Optionally, in one embodiment of the present application, a welding temperature verification result for the device under test is generated based on the temperatures of multiple regions, the actual furnace temperature calibration curve of the device under test, and a reference furnace temperature calibration curve, including: selecting key control parameter items corresponding to the welding material of the device under test and their corresponding target control variation ranges; if the difference between the key control parameter items in the actual furnace temperature calibration curve and the corresponding key control parameter items in the reference furnace temperature calibration curve is within the corresponding target control variation range, then determining that the welding temperature verification result is normal; otherwise, determining that the welding temperature is abnormal. The key control parameter items include at least one of the preheating slope, constant temperature time, welding time, and maximum welding temperature.

[0129] Professionals and technicians in this technical field can understand that the key control parameters here refer to the temperature parameters and time nodes that play a decisive role in the welding quality during the welding temperature calibration process. They directly affect the welding quality of the product and are reflected in the furnace temperature calibration recommended correction curve.

[0130] Based on this, when determining the welding temperature test results of the device under test, embodiments of the present application can also select the key control parameter items corresponding to the welding material of the device under test and their target control variation range to determine the welding temperature verification results. The target control variation range here can be understood as the allowable variation range of the key control parameter items.

[0131] In the embodiments of this application, the key control parameters selected may be, but are not limited to, those affecting product soldering quality as specified in the recommended profiles of electronic material and solder paste manufacturers (optimal soldering temperature curves provided by electronic material and solder paste manufacturers based on material properties), including but not limited to preheating ramp rate, hold time, soldering time, and maximum soldering temperature. Different key control parameters have different target control ranges.

[0132] If the difference between the key control parameter item in the actual furnace temperature correction curve and the corresponding key control parameter item in the reference furnace temperature correction curve is within the corresponding target control change range, it can be determined that the welding temperature verification result is normal.

[0133] If the difference between any key control parameter item in the actual furnace temperature correction curve and the corresponding key control parameter item in the reference furnace temperature correction curve is not within the corresponding target control variation range, the welding temperature calibration result can be determined to be abnormal.

[0134] The preheat ramp rate (Ramp Up) affects the slow speed of the PCB and components. Controlling this parameter ensures uniform heating of the soldered components during production, while also removing moisture and solvents from the solder paste to prevent solder paste collapse and spatter. The normal range for the preheat ramp rate parameter is 1-3°C / s. The corresponding control range for the ramp rate in the calibration curve can be, but is not limited to, set to: ΔRamp Up ≤ 0.5°C / s for normal operation, and ΔRamp Up > 0.5°C / s for abnormal heating.

[0135] Soak time ensures uniform temperature of the soldered objects before soldering, allowing for sufficient vapor evaporation and flux activation. The normal range for the soak time parameter is 60 to 120 seconds. The corresponding control range for △Soak time in the calibration curve can be set, but is not limited to: △Soak time ≤ 5 seconds indicates normal operation, and △Soak time > 5 seconds indicates abnormal heating.

[0136] Reflow time allows sufficient time for the printed solder paste to melt with the material pins, forming a good metallurgical bond and achieving optimal soldering strength. The normal range of the soldering time parameter is 30-60 seconds. The corresponding control range of △Reflow time in the calibration curve can be set, but not limited to: △Reflow time ≤ 5 seconds for normal state, and △Reflow time > 5 seconds for heating abnormality.

[0137] Peak welding temperature (peak temp) influences grain boundary migration and phase transformation, affecting the material's mechanical properties and corrosion resistance. Therefore, an appropriate peak welding temperature can maximize the weld strength of the alloy after welding. The normal range of the peak welding temperature parameter is 235-250°C. The corresponding control range of △Peak temp in the validation curve can be set, but is not limited to: △Peak temp ≤ 2°C indicates normal operation, and △Peak temp > 2°C indicates abnormal heating.

[0138] For example, the rules for comparing an actual furnace temperature calibration curve with a reference furnace temperature calibration curve may be, but are not limited to, the following:

[0139] 1. Compare the difference of Soak time between 170-220℃. If it is less than 5 seconds, it is normal, otherwise it is abnormal.

[0140] 2. Compare the difference between the ramp up of 45-170℃. If the temperature is less than 0.5℃ / sec, it is normal. Otherwise, it is abnormal.

[0141] 3. Compare the difference in Reflow time at 220℃. If ≤5sec, it is normal, otherwise it is abnormal.

[0142] 4. Compare the difference in Peak temperature. If it is ≤2℃, it is normal, otherwise it is abnormal.

[0143] It should be noted that the key control parameters of specific welding materials and their target control variation ranges can be, but are not limited to, set and adjusted by professional and technical personnel in this technical field according to actual conditions. The embodiments of this application are only for illustrative purposes and are not specifically limited.

[0144] The embodiment of the present application can select the key control parameter items corresponding to the welding material of the equipment to be tested and their corresponding target control variation range to determine whether the welding temperature is abnormal. By setting a reasonable variation range of the key factors, the key factors affecting the welding temperature are compared, and the key factors affecting the welding effect are accurately located, thereby effectively reducing the problem troubleshooting time and improving maintenance efficiency.

[0145] Optionally, in one embodiment of the present application, it also includes: generating a local color contrast map of the device under test based on the verification result; pushing the local color contrast map to at least one user, so that the at least one user can control the welding temperature of the device under test.

[0146] In certain embodiments, after determining the calibration result of the welding temperature of the device under test, in order to facilitate the user (the operator of the device under test) to understand the current status of the device under test more intuitively and clearly, the present application may, but is not limited to, generate a local color contrast map of the device under test based on the calibration result and push it to at least one user, so that the user can control the welding temperature of the device under test based on the local color contrast map.

[0147] The local color comparison chart can be understood as an image formed by using different colors to represent different verification results of the fixed edge, movable edge, track center, board entry edge, and board exit edge of the device under test.

[0148] For example, green indicates that a certain area of ​​the device under test has no abnormalities, red indicates that a certain area of ​​the device under test has abnormalities, and yellow indicates that a certain area may have potential abnormalities. By representing the calibration results of all areas of the device under test with different colors, a local color comparison map of the device under test can be obtained.

[0149] The embodiment of the present application can generate a local color comparison map of the device under test based on the calibration result of the welding temperature of the device under test, which can intuitively remind the user, help the user to efficiently understand the status of each area of ​​the device under test, and timely control the welding temperature of the abnormal area in the device under test to ensure the normal operation of the production line.

[0150] Optionally, in one embodiment of the present application, the method further includes: determining a device status of the device under test according to an actual furnace temperature correction curve within a preset time; and generating a maintenance frequency of the device under test according to the device status.

[0151] As a possible implementation method, the present application can also determine the device status of the device under test based on the actual furnace temperature calibration curve within a preset time, so as to produce the maintenance frequency of the device under test based on the device status of the device under test. The preset time here can be understood as a pre-set time period, such as half a month, a month, etc., which serves as the time range for determining the device status of the device under test.

[0152] Taking reflow soldering (reflow oven) as an example, this application can first set up a Figure 4 The SMT Reflow and Wave Correction Profile Test Maintenance Record Sheet (Surface Mount Technology Reflow and Wave Soldering Calibration Curve Test Maintenance Record Sheet) and a Figure 5 The "Reflow Correction PROFILE Result Comparison Table" (Reflow Calibration Curve Result Comparison Table) shown in the figure is used to record the test and maintenance records of the equipment and the comparison results of reflow soldering respectively.

[0153] Then, the embodiment of the present application can obtain the actual furnace temperature correction curve of the reflow soldering within the preset time. Figure 6 This is a flow chart of soldering temperature calibration for reflow soldering according to an embodiment of the present application, as shown in FIG. Figure 6 As shown:

[0154] (1) When a factory purchases a new reflow oven, the equipment manufacturer will arrange for engineers to complete the installation and commissioning of the equipment and the initial delivery verification. After that, they will work with the factory equipment engineer to conduct equipment acceptance confirmation. Once the equipment acceptance is completed, the reflow oven can be put into normal use;

[0155] (2) The factory furnace temperature tester sets the furnace temperature calibration recommended correction curve corresponding to the reflow oven temperature calibration basic curve parameters in the reflow oven program, and sets and archives the calibration curve temperature parameters corresponding to each temperature zone of the device under test in the reflow oven according to the recommended parameters of each temperature zone in the furnace temperature calibration recommended correction curve;

[0156] (3) Retrieve the temperature parameters of the calibration curve, start the equipment and start heating;

[0157] (4) After the temperature rises to the preset temperature and stabilizes, connect the furnace temperature calibration board to the temperature monitor and start temperature measurement according to the normal temperature measurement process. The preset temperature here can be understood as the temperature recommendation parameter of each temperature zone in the furnace temperature calibration recommendation curve, and can also be understood as the temperature that the reflow furnace should reach in each temperature zone under ideal conditions;

[0158] (5) The temperature monitor generates a reference furnace temperature calibration curve using the furnace temperature calibration recommended calibration curve as a reference curve, and records the temperature measurement results of the corresponding temperature monitoring points in the curve into the "SMT Reflow and Wave Calibration Profile Test Record Decision Table";

[0159] (6) At a test frequency of once every two weeks, still use the same furnace temperature calibration board and perform furnace temperature testing according to the first temperature setting and test method. Repeat the calibration and temperature measurement process of 3 to 6 each time. After the test is completed, record the test results again in the "Reflow Correction PROFILE Result Comparison Table";

[0160] (7) Each time the test is repeated, a record is made. Combined with the target control change range of the key control parameter items corresponding to the welding material of the equipment to be tested, the record sheet will automatically compare the current measurement results with the first results (reference furnace temperature calibration curve) and give the verification results;

[0161] (8) If Figure 5As shown, when each temperature measurement comparison result is within the qualified range, the result will be recorded as OK, and the △ value column will be filled with light gray, indicating that there is no abnormality in the comparison result. When a temperature measurement comparison result exceeds the qualified range, the △ value column will be filled with dark gray, indicating that there is an abnormality in the comparison result.

[0162] (9) If there is no abnormality, the furnace temperature test will be carried out normally and production will be carried out;

[0163] (10) If there is any abnormality, notify the equipment engineer to repair and confirm the equipment, and fill in the "SMT Reflow and Wave Correction Profile Test Maintenance Record Form";

[0164] (11) After the repair is completed, the calibration curve temperature parameters are retrieved again, the equipment is started and the temperature is increased, and the above measurement and comparison processes are repeated until the final measurement comparison results △ are all light gray. If there is no abnormality in a key control item, the corresponding table will be displayed in light gray. If there is an abnormality in a key control item, the corresponding table will be displayed in dark gray.

[0165] Taking this as an example, the calibration curve obtained from the first test is used as the reference furnace temperature calibration curve. The calibration curve obtained from the second test is compared with the first test curve, and the third is compared with the first, and so on. The results of each subsequent test are compared with the calibration curve obtained for the first time; ensuring that the heating performance of the equipment after operation and maintenance remains consistent with the initial equipment installation, thereby ensuring the consistency of the heating characteristics of the equipment itself.

[0166] If an abnormal furnace temperature is found for a product during subsequent shift testing, the equipment itself can be ruled out as the cause, and only the furnace temperature plate or other variables of the product produced during that shift need to be checked, thus saving troubleshooting cycles.

[0167] Furthermore, after multiple welding temperature calibrations, the embodiment of the present application can determine the maintenance frequency of the device under test and the equipment area related to the key control items based on the abnormal frequency of different key control items in the device under test.

[0168] For example, if an abnormality occurs in the constant temperature zone every two tests, combined with the test frequency of once every half month, it can be determined that the constant temperature zone of the device under test is prone to abnormalities one month after maintenance. In this case, the maintenance frequency can be set to once a month.

[0169] The embodiments of the present application can determine the device status of the device under test in combination with the calibration abnormality frequency of the device under test; generate the maintenance frequency of the device under test based on the device status, which can effectively predict whether the device under test can work normally, thereby discovering equipment abnormalities in advance and performing equipment repair and maintenance in advance, avoiding frequent adjustments to furnace temperature parameters during product production furnace temperature testing, wasting production line production time, and improving operating efficiency and equipment utilization rate.

[0170] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method.

[0171] An embodiment of the present application also provides a computer program product.

[0172] Figure 7 A block diagram of a computer program product provided according to an embodiment of the present application.

[0173] like Figure 7 As shown, the computer program product 20 includes: an acquisition module 300 , a generation module 400 and a verification module 500 .

[0174] The acquisition module 300 is used to acquire the number of temperature zones of the device under test, so as to generate recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the device under test according to the number of temperature zones.

[0175] The generating module 400 is used to generate a recommended correction curve for the furnace temperature calibration of the device under test based on the recommended parameters.

[0176] The calibration module 500 obtains the temperature of multiple areas of the device under test based on the temperature of the metal part after the calibration component and the device under test are set accordingly, and generates a reference furnace temperature calibration curve corresponding to the device under test based on the furnace temperature calibration recommended calibration curve, so as to generate a welding temperature calibration result of the device under test according to the temperatures of multiple areas, the actual furnace temperature calibration curve of the device under test and the reference furnace temperature calibration curve.

[0177] The description of the features in the embodiment corresponding to the computer program product 20 can refer to the relevant description of the embodiment corresponding to the welding temperature verification method, and will not be repeated here.

[0178] An embodiment of the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any of the above-mentioned welding temperature verification method embodiments.

[0179] An embodiment of the present application further provides a non-volatile computer-readable storage medium, in which a computer program is stored. The computer program is configured to execute the steps of any of the above-mentioned welding temperature verification method embodiments when running.

[0180] In an exemplary embodiment, the non-volatile computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0181] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of any of the above-mentioned welding temperature verification method embodiments are implemented.

[0182] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above-mentioned welding temperature verification method embodiments are implemented.

[0183] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0184] The above describes in detail the welding temperature calibration component and calibration method provided by this application. This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A welding temperature calibration assembly, comprising a carrier plate and a plurality of metal parts, wherein the plurality of metal parts are embedded and fixed to the carrier plate, and each of the metal parts is provided with a temperature sensor for sensing the temperature of the metal part; in, The plurality of metal parts are arranged in multiple rows and columns and are evenly spaced; In which, the multiple metal parts include multiple first metal parts and multiple second metal parts, the multiple first metal parts are arranged in a rectangular shape, the second metal parts are provided between the first metal parts adjacent in the first direction, and multiple second metal parts are provided between two adjacent rows of the first metal parts in the second direction, and the multiple second metal parts form at least one through hole on the carrier, and the at least one through hole is arranged around the second metal parts.

2. A method for calibrating welding temperature, characterized in that: The welding temperature correction component according to claim 1 is used, wherein the method includes the following steps: Obtaining the number of temperature zones of the device under test, and generating recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the device under test according to the number of temperature zones; Based on the recommended parameters, generating a furnace temperature calibration recommended correction curve for the device under test; After the calibration component and the device under test are set accordingly, the temperatures of multiple areas of the device under test are obtained based on the temperature of the metal part, and a reference furnace temperature calibration curve corresponding to the device under test is generated based on the furnace temperature calibration recommended calibration curve, so as to generate a welding temperature calibration result of the device under test according to the temperatures of the multiple areas, the actual furnace temperature calibration curve of the device under test and the reference furnace temperature calibration curve.

3. The welding temperature calibration method according to claim 2, characterized in that: Generating the recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the device under test according to the number of temperature zones includes: Obtaining welding parameter characteristics of key consumables of the equipment under test during the production process; The recommended parameters are determined based on the welding parameter characteristics of the key consumables, the number of temperature zones, and the temperature difference control performance of the device under test between different temperature zones.

4. The method for verifying welding temperature according to claim 2, wherein: The step of generating a reference furnace temperature calibration curve corresponding to the device under test based on the furnace temperature calibration recommendation calibration curve includes: Collecting working data of the device under test in a target working state; The reference furnace temperature correction curve is generated based on the operating parameters in the operating data corresponding to the furnace temperature verification basic curve parameters and the furnace temperature verification recommended correction curve.

5. The welding temperature calibration method according to claim 4, characterized in that: The obtaining the temperatures of the plurality of regions of the device under test based on the temperature of the metal part includes: Based on the temperature of the metal part, determining the local temperatures corresponding to the fixed side, the movable side, the track center, the board entry side, and the board exit side of the device under test; The temperatures of multiple areas of the device under test are determined according to the local temperatures corresponding to the fixed side, the movable side, the track center, the board entry side, and the board exit side of the device under test.

6. The method for verifying welding temperature according to claim 2, wherein: Generating a welding temperature calibration result of the device under test according to the temperatures of the multiple zones, the actual furnace temperature calibration curve of the device under test, and the reference furnace temperature calibration curve includes: Select key control parameter items corresponding to the welding material of the equipment under test and their corresponding target control variation ranges; If the difference between the key control parameter item in the actual furnace temperature correction curve and the corresponding key control parameter item in the reference furnace temperature correction curve is within the corresponding target control variation range, then the verification result of the welding temperature is determined to be normal; otherwise, it is determined that the welding temperature is abnormal.

7. The method for verifying welding temperature according to claim 6, wherein: The key control parameter items include at least one of the preheating temperature rise slope, constant temperature time, welding time, and maximum welding temperature.

8. The method for verifying welding temperature according to claim 2, wherein: Also includes: Based on the verification result, generating a local color comparison diagram of the device under test; The local color contrast chart is pushed to at least one user, so that the at least one user can control the welding temperature of the device under test.

9. The method for verifying welding temperature according to claim 2, wherein: Also includes: Determine the device status of the device under test according to the actual furnace temperature calibration curve within a preset time; A maintenance frequency of the device under test is generated according to the device status.

10. A computer program product, characterized in that The soldering temperature correction component according to claim 1, wherein the computer program product comprises: An acquisition module, configured to acquire the number of temperature zones of the device under test, and generate recommended parameters corresponding to the furnace temperature calibration basic curve parameters of the device under test according to the number of temperature zones; A generating module, configured to generate a furnace temperature calibration recommended correction curve for the device under test based on the recommended parameters; A verification module is used to obtain the temperatures of multiple areas of the device under test based on the temperature of the metal part after the calibration component and the device under test are set accordingly, and to generate a reference furnace temperature correction curve corresponding to the device under test based on the furnace temperature calibration recommended correction curve, so as to generate a welding temperature verification result of the device under test according to the temperatures of the multiple areas, the actual furnace temperature correction curve of the device under test and the reference furnace temperature correction curve.

11. The computer program product according to claim 10, wherein The acquisition module includes: An acquisition unit, configured to acquire welding parameter characteristics of key consumables of the device under test during the production process; The first determination unit is used to determine the recommended parameters based on the welding parameter characteristics of the key consumables, the number of temperature zones, and the temperature difference control performance of the device under test between different temperature zones.

12. The computer program product according to claim 10, wherein The verification module includes: An acquisition unit, configured to acquire operating data of the device under test in a target operating state; The second determining unit is configured to generate the reference furnace temperature correction curve based on the operating parameters in the operating data corresponding to the furnace temperature verification basic curve parameters and the furnace temperature verification recommended correction curve.

13. The computer program product according to claim 12, wherein: The acquisition unit includes: A first determining subunit is configured to determine, based on the temperature of the metal part, local temperatures corresponding to the fixed side, the movable side, the track center, the board entry side, and the board exit side of the device under test; The second determining subunit is configured to determine the temperatures of multiple regions of the device under test according to the local temperatures corresponding to the fixed side, the movable side, the track center, the board entry side, and the board exit side of the device under test.

14. The computer program product according to claim 10, wherein: The verification module includes: A selection unit, configured to select key control parameter items corresponding to the welding material of the device under test and their corresponding target control variation ranges; The verification unit is used to determine that the verification result of the welding temperature is that there is no abnormality in the welding temperature when the difference between the key control parameter item in the actual furnace temperature correction curve and the corresponding key control parameter item in the reference furnace temperature correction curve is within the corresponding target control change range; otherwise, it is determined that there is an abnormality in the welding temperature.

15. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the welding temperature calibration method according to any one of claims 2 to 9.

16. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the welding temperature calibration method according to any one of claims 2 to 9.

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