Method and system for acquiring welding parameters of copper pipe

Abstract

The invention discloses a method and system for obtaining copper pipe welding parameters, and the method comprises the steps: obtaining a first length verification copper pipe with the same specification as a copper pipe required by actual welding, and dividing the verification copper pipe into a plurality of verification areas from the first to the Nth; executing a first verification step on the first area when the verification copper pipe is in a non-ventilation state; sequentially introducing protective gas into the verification copper pipe according to a preset flow gradient, and sequentially executing a second verification step on the S adjacent verification areas under different flows; oxidation information in the verification copper pipe is obtained, and a welding parameter comparison table of the current verification copper pipe is generated based on the oxidation information; and on the basis of the welding parameter comparison table, welding parameters of the current welded copper pipe are obtained. The method can effectively verify the internal protection effect of the copper pipe during copper pipe brazing under the conditions of various heating temperatures, heating time and gas flow, and is beneficial to certification and use of copper pipe induction brazing process evaluation.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline welding, and in particular to a method and system for obtaining copper pipe welding parameters. Background Art

[0002] Gas brazing is required for copper pipe welding. Flame brazing, due to its flexibility and ease of use, has become the mainstream method for on-site construction. To reduce oxidation of the copper pipe's inner wall during brazing, construction specifications require the introduction of an inert gas, such as argon or nitrogen, into the pipe for protection during brazing.

[0003] Currently, flame brazing of copper pipes using gas is highly dependent on the welder's skill and experience. However, precise control of the heating temperature, duration, and range during the welding process is difficult, which can easily lead to problems such as uneven solder distribution and insufficient joint strength. Even with the use of inert gas shielding during the heating process, the instability of flame heating and the limitations of the gas shielding effect cannot completely prevent severe oxidation within the copper pipe. The residual oxide layer can affect the pipe's cleanliness and corrosion resistance.

[0004] Different types of copper tubes require different welding parameters. Different heating temperatures, heating times, and gas flow rates all have varying effects on the protection effect. Due to the closed structure of copper tubes, direct monitoring of internal oxidation during and after welding is difficult. Consequently, determining optimal welding parameters relies on trial and error, and parameter control during the construction process lacks real-time feedback. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a method and system for obtaining copper pipe welding parameters, which can solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, this application adopts the following technical solutions: On the one hand, a method for obtaining copper pipe welding parameters is provided, which includes: Step S10: Obtain a first length verification copper tube of the same specification as the copper tube required for actual welding, and divide the verification copper tube into a plurality of adjacent verification zones, defining the verification zones as zone 1, zone 2, ..., zone M, zone M+1, ..., zone M+S, ..., zone N in sequence along the axis of the verification copper tube; Step S20: performing a first verification step on the first zone while the verification copper tube is in a non-ventilated state; The first verification step includes heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes within the first temperature interval, the time T including the first temperature node time T1, the second temperature node time T2, ..., the Sth temperature node time TS; Step S30, introducing protective gas into the verification copper tube in sequence according to a preset flow gradient, and performing the second verification step on S adjacent verification areas in sequence at different flow rates; The second verification step includes: heating the Mth area to the M+Sth area respectively, with the heating times being T1, T2, ..., TS respectively; Step S40: Obtain oxidation information in the verification copper tube, and generate a welding parameter comparison table for the current verification copper tube based on the oxidation information; Step S50: Based on the welding parameter comparison table, obtain the welding parameters of the current copper pipe welding.

[0007] In one embodiment, in step S10, the lengths of adjacent verification areas are the same.

[0008] In one embodiment, in step S20 and step S30, when heating the verification copper tube, the process includes: An open induction heating coil is used, and the heating coil is sleeved on the corresponding verification area of ​​the verification copper tube, and the heating power of the induction heating coil is constant during heating.

[0009] In one embodiment, the first temperature range is 650-800°C.

[0010] In one embodiment, the length of the verification area is 100 mm.

[0011] In one embodiment, the initial flow rate of the protective gas is 10 L / min.

[0012] In one embodiment, in step S30, when heating the adjacent verification area, the subsequent verification area should be heated after the temperature of the verification copper tube drops to room temperature.

[0013] In one embodiment, the step 40 includes: Step S410: Divide the verification copper tube into two along a plane including its axis; Step S420: Obtain image data of the inner wall of the verification copper tube, input the image data into a trained neural network recognition model, and obtain the oxidation degree at different positions based on the neural network recognition model analysis; Step S430: outputting the color difference ΔE of different verification areas according to the level of oxidation, wherein the range of the color difference ΔE is 1 to 20; Step S440: Based on the color difference ΔE, a welding parameter comparison table for the current verification copper pipe is generated.

[0014] In one embodiment, the step S430 includes: The colors of the oxidized areas of different levels and the unoxidized substrate are converted to the CIELAB space, and the color difference ΔE is calculated:

[0015]

[0016]

[0017]

[0018] Among them, L* is the brightness factor, which represents the lightness or darkness of the color; a* is the red-green axis chromaticity coordinate; and b* is the blue-yellow axis chromaticity coordinate.

[0019] On the other hand, the present disclosure further provides a system capable of executing any of the above-mentioned methods for obtaining copper pipe welding parameters, comprising: a raw material preparation module, which is used to obtain a first length verification copper tube of the same specification as the copper tube required for actual welding, and divide the verification copper tube into a plurality of adjacent verification zones, and define the verification zones in sequence along the axis direction of the verification copper tube as zone 1, zone 2, ..., zone M, zone M+1, ..., zone M+S, ..., zone N; a first verification module, configured to perform a first verification step on the first zone when the verification copper tube is in a non-ventilated state; The first verification step includes heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes within the first temperature interval, the time T including the first temperature node time T1, the second temperature node time T2, ..., the Sth temperature node time TS; A second verification module, which is used to sequentially introduce protective gas into the verification copper tube according to a preset flow gradient, and sequentially perform a second verification step on S adjacent verification areas at different flow rates; The second verification step includes: heating the Mth area to the M+Sth area respectively, with the heating times being T1, T2, ..., TS respectively; A data processing module, which is used to obtain oxidation information in the verification copper tube and generate a welding parameter comparison table of the current verification copper tube based on the oxidation information; The data output module is used to obtain the welding parameters of the current copper pipe based on the welding parameter comparison table.

[0020] The beneficial effects of this application are: 1. It can effectively verify the internal protection effect of copper tubes during brazing under various heating temperatures, heating times and gas flow conditions.

[0021] 2. It can accurately control the induction brazing heating time and the flow of argon or nitrogen inside the copper tube, completely avoiding serious oxidation inside the copper tube and ensuring the construction acceptance and use of copper tube brazing.

[0022] 3. The complete copper tube brazing parameter table formed after verification only needs to be welded according to the parameters in the welding parameter table in the subsequent welding process, which can effectively ensure the cleanliness of the inside of the tube after brazing, and is helpful for the certification and use of the copper tube induction brazing welding process assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0024] Figure 1 This is a schematic diagram of the structure of the copper tube for verification of Example 1 of this application; Figure 2 This is a schematic diagram of the structure of the verification copper tube after being cut open in Example 1 of the present application; Figure 3 This is a flow chart of a method for obtaining copper tube welding parameters according to Example 1 of the present application; Figure 4 This is a flow chart of step S40 in the method for obtaining copper tube welding parameters according to the first embodiment of the present application; Figure 5 This is a schematic diagram of the module structure of a system for acquiring copper tube welding parameters according to Example 1 of the present application. DETAILED DESCRIPTION

[0025] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. 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 those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0026] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] like Figure 1 and Figure 4 As shown, the present disclosure provides a method for obtaining copper pipe welding parameters. Through the acquisition method provided by the present disclosure, the welding time, welding temperature, and shielding gas flow rate values ​​required for welding copper pipes of different specifications can be accurately obtained. This provides a reference data basis for subsequent copper pipe welding.

[0029] Specifically, the method for obtaining copper pipe welding parameters includes at least the following steps.

[0030] First, execute step S10 to obtain a first length verification copper tube with the same specifications as the copper tube required for actual welding, and divide the verification copper tube into multiple adjacent verification areas. The verification areas are defined as area 1, area 2, ..., area M, area M+1, ..., area M+S, ... area N along the axial direction of the verification copper tube.

[0031] For example, in one embodiment, a verification copper tube having a first length of 1700 mm can be cut and divided into 17 equidistant verification zones. It is understood that each verification zone is 100 mm long, and the 17 verification zones are defined as zones 1 to 17 along the axis of the verification copper tube.

[0032] It should be noted that the 17 verification areas are divided into 5 verification units, wherein the first verification unit only includes the first area, and the subsequent first to fourth verification units each include 4 verification areas.

[0033] However, the present invention is not limited thereto, and the verification area may be divided according to actual needs.

[0034] As you can understand, the verification copper tube is divided into multiple adjacent verification zones along its axis, each serving as an independent testing unit for welding parameters. By applying different welding conditions to different zones, the welding results can be systematically compared across them, avoiding accidental errors from a single test point and accurately identifying the optimal parameter combination. Furthermore, the verification zones are divided into five units in a "1+4×4" pattern, allowing for easier gradient testing of parameters.

[0035] For example, different temperature gradients can be set for different units, and different welding times or gas flows can be set for different areas within the same unit to form a matrix test solution that efficiently covers multiple parameter combinations and improves test efficiency and data integrity.

[0036] Furthermore, in order to facilitate identification of different verification areas, adjacent verification areas may be separated by lines.

[0037] Then, step S20 is executed to perform a first verification step on the first zone while verifying that the copper tube is in a non-ventilated state.

[0038] Among them, the first verification step includes: heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes in the first temperature range, where the time T includes the first temperature node time T1, the second temperature node time T2,... the Sth temperature node time TS.

[0039] For example, in one embodiment, the first temperature range includes 650-800°C. Meanwhile, the temperature of the first temperature node is 650°C, the temperature of the second temperature node is 700°C, the temperature of the third temperature node is 750°C, and the temperature of the fourth temperature node is 800°C. By setting multiple temperature nodes within the first temperature range and recording the arrival time of each node, a quantitative "temperature-time" correspondence is established. This data can be directly used to set the time parameters for temperature control during the subsequent welding process.

[0040] When heating the first zone, an open-type induction heating coil may be used, and the heating coil may be placed on the corresponding verification zone of the verification copper tube. The heating power of the induction heating coil is constant during heating. It should be noted that in the subsequent steps of heating the verification copper tube, the heating power of the induction heating coil used is constant and the same as the heating power in step S10. The use of a constant-power open-type induction heating coil coaxially with the copper tube ensures uniform heat conduction during the heating process, avoids temperature field deviations caused by power fluctuations or eccentric heating, and lays the foundation for the accuracy of the temperature-time data.

[0041] It is important to note that when the induction heating coil is heating the verification copper tube, the induction heating coil and the verification copper tube are coaxially arranged to ensure that the verification coil is heated stably during the heating process.

[0042] Testing in a non-ventilated state eliminates the interference of the protective gas on heat conduction, so that the temperature rise curve only reflects the relationship between the copper tube material and the heating power, forming pure benchmark data.

[0043] Furthermore, step S30 is executed to sequentially introduce protective gas into the verification copper tube according to a preset flow gradient, and the second verification step is sequentially performed on S adjacent verification areas at different flow rates.

[0044] The second verification step includes: heating the Mth area to the M+Sth area respectively, with the heating times being T1, T2...TS respectively.

[0045] For example, in one embodiment, the initial flow rate of the shielding gas may be allowed to be 10 L / min, and the gradient of the subsequent initial flow rates may be increased in increments of 5 L / min.

[0046] The flow gradient test covers the fluctuation scenarios that may occur in actual production. By verifying the welding effects under different flow rates, the final parameters can have stronger anti-interference capabilities.

[0047] It should be noted that step S30 may specifically include the following steps.

[0048] Step S310: Inert gas is introduced into the verification copper tube, with the gas flow rate controlled at 10 L / min. In Zone 2 of the second verification unit, the verification copper tube is heated for a time period of T1 using an induction coil. After the tube cools, the induction coil is heated for a time period of T2 using Zone 3. After the tube cools, the induction coil is heated for a time period of T3 using Zone 4. After the tube cools, the induction coil is heated for a time period of T4 using Zone 5.

[0049] Step S320: Inert gas is introduced into the verification copper tube, with the gas flow rate controlled at 15 L / min. In Zone 6 of the third verification unit, the verification copper tube is heated for a time T1 using an induction coil. After the tube cools, the induction coil is heated for a time T2 in Zone 7. After the tube cools, the induction coil is heated for a time T3 in Zone 8. After the tube cools, the induction coil is heated for a time T4 in Zone 9.

[0050] Step S330: Inert gas is introduced into the verification copper tube, with the gas flow rate controlled at 20 L / min. In zone 10 of the fourth verification unit, the verification copper tube is heated for time T1 using an induction coil. After the tube cools, the induction coil in zone 11 is heated for time T2. After the tube cools, the induction coil in zone 12 is heated for time T3. After the tube cools, the induction coil in zone 13 is heated for time T4.

[0051] Step S340: Inert gas is introduced into the verification copper tube, with the gas flow rate controlled at 25 L / min. In zone 14 of the fifth verification unit, the verification copper tube is heated for a time period of T1 using an induction coil. After the tube cools, the induction coil is heated for a time period of T2 using a zone 15. After the tube cools, the induction coil is heated for a time period of T3 using a zone 16. After the tube cools, the induction coil is heated for a time period of T4 using a zone 17.

[0052] As can be appreciated, in steps S310 through S340, the verification zones contained therein are heated in shielding gas at different flow rates for times T1 to T4. Consequently, the degree of oxidation within the verification copper tube varies across the verification zones. Therefore, by verifying the degree of oxidation, the optimal parameters for the copper tube during the actual welding process can be determined.

[0053] Furthermore, step S40 is executed to obtain oxidation information in the verification copper tube, and generate a welding parameter comparison table of the current verification copper tube based on the oxidation information.

[0054] Specifically, in step S40 , the oxidation state of the copper tube may be determined and verified based on the oxidation color of the inner wall of the copper tube.

[0055] Furthermore, in step S40, the following steps may be specifically included.

[0056] Step S410: Divide the verification copper tube into two along a plane including its axis.

[0057] Specifically, by bisecting the verification copper tube, the degree of oxidation within the tube can be more easily confirmed. By bisecting the tube along its axis, the blind spot on the cylindrical inner wall is eliminated, allowing the industrial camera to directly capture a complete image of the inner wall. Compared to non-destructive testing, the bisecting method avoids image distortion caused by optical refraction. Combined with the high resolution and noise immunity of the industrial camera, it can capture micron-level oxide film textures.

[0058] Step S420: Obtain image data of the inner wall of the copper tube for verification, input the image data into a trained neural network recognition model, and obtain the oxidation degree at different positions based on the neural network recognition model analysis.

[0059] It should be noted that in step S420, an image recognition device may be used to capture the inner wall of the copper tube being verified to obtain image data. For example, an industrial camera may be used. An industrial camera is an image acquisition device designed with industrial standards and capable of stable operation in complex environments. It captures an image of an object through a lens and converts it into a digital signal for subsequent analysis by an image processing system.

[0060] Furthermore, a trained neural network recognition model is preset, and the oxidation degree at different positions is analyzed and obtained through the neural network recognition model.

[0061] Specifically, in one embodiment, the neural network recognition model provided by this disclosure may include convolutional and pooling layers, using convolution kernels of varying sizes to extract features such as texture, color, and edges in oxidized regions. Since the goal is to quantify the degree of oxidation and stratify it, multi-classification can be achieved through fully connected layers and a softmax function. Furthermore, when locating oxidized regions, a semantic segmentation model can be employed to output an oxidation probability map for each pixel.

[0062] Furthermore, the neural network module can classify the oxidation levels of different verification areas.

[0063] Step S430: Output the color difference ΔE of different verification areas based on the oxidation level. The color difference ΔE ranges from 1 to 20. It should be noted that when ΔE is less than 5, it indicates that the oxidation level of the copper tube being verified meets actual usage requirements. Otherwise, it indicates that the oxidation level of the copper tube being verified does not meet actual practical requirements.

[0064] Specifically, in the process of obtaining ΔE, the colors of different levels of oxidation areas and unoxidized substrates can be converted into CIELAB space to calculate the color difference ΔE, including: ; ; ; ; Among them, L* is the brightness factor, which represents the lightness or darkness of the color; a* is the red-green axis chromaticity coordinate; and b* is the blue-yellow axis chromaticity coordinate.

[0065] As you can understand, the CIELAB space is defined based on the CIE standard illuminant. The RGB values ​​are linearly converted to Lab* coordinates through a formula, which can eliminate the color shift caused by spectral response differences and ambient light fluctuations in industrial cameras.

[0066] At the same time, by setting the color difference ΔE standard, oxidation detection is upgraded from "qualitative description" to "quantitative analysis", thereby improving the actual verification accuracy.

[0067] Step S440: Generate a welding parameter comparison table for the currently verified copper pipe based on the color difference ΔE.

[0068] See Table 1 Table 1

[0069] Finally, step S50 is executed to obtain the welding parameters of the current copper pipe based on the welding parameter comparison table.

[0070] In step S50 , the oxidation degrees in Table 1 may be compared row by row and column by column.

[0071] Specifically, if we compare them row by row, we can get the protective effect of different shielding gas flow rates on the inside of the copper tube at the same heating temperature. If we compare them row by row, we can get the protective effect of different shielding gas flow rates on the inside of the copper tube at the same heating temperature.

[0072] Specifically, in order to improve the actual visualization effect, highlighting may be allowed for qualified welding parameters.

[0073] For example, in one embodiment, welding parameters that may be determined to comply with welding regulations include: 1. 650℃, gas flow rate ≥10L / min; 2. 700℃, gas flow rate ≥15L / min; 3. 750℃, gas flow rate ≥20L / min; 4. 800℃, gas flow rate ≥25L / min.

[0074] See Table 2 Table 2

[0075] See also Figure 4 Based on the method for obtaining copper tube welding parameters in any of the above embodiments, the present disclosure also provides a system that can execute any of the above methods for obtaining copper tube welding parameters, which has functional modules and beneficial effects corresponding to the execution method.

[0076] Specifically, the system includes a raw material preparation module, a first verification module, a second verification module, a data processing module and a data output module.

[0077] Specifically, the raw material preparation module is used to obtain a first length verification copper tube with the same specifications as the copper tube required for actual welding, and divide the verification copper tube into multiple adjacent verification areas, and define the verification areas as area 1, area 2,..., area M, area M+1,..., area M+S,...area N along the axial direction of the verification copper tube.

[0078] The first verification module is configured to perform a first verification step on the first zone while verifying that the copper tube is in a non-ventilated state. The first verification step includes heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes within the first temperature range, where the time T includes the first temperature node time T1, the second temperature node time T2, ..., and the Sth temperature node time TS.

[0079] The second verification module is configured to sequentially introduce shielding gas into the verification copper tube according to a preset flow gradient and perform a second verification step on S adjacent verification zones at different flow rates. The second verification step includes heating zones M through M+S, respectively, for heating times T1, T2, ..., TS, respectively.

[0080] The data processing module is used to obtain oxidation information in the verification copper tube and generate a welding parameter comparison table of the current verification copper tube based on the oxidation information.

[0081] The data output module is used to obtain the welding parameters of the current copper pipe based on the welding parameter comparison table.

[0082] In summary, the present disclosure provides a method and system for obtaining copper tube welding parameters, which can verify the internal protection effect of copper tubes during brazing under various heating temperatures, heating times, and gas flow conditions. At the same time, it can accurately control the induction brazing heating time and the flow of argon or nitrogen gas inside the copper tube, completely avoiding severe oxidation inside the copper tube and ensuring the construction acceptance and use of copper tube brazing. In addition, through the complete copper tube brazing welding parameter table formed after verification, in the subsequent welding process, only the parameters in the welding parameter table need to be welded, which can effectively ensure the cleanliness of the inside of the tube after brazing, which is helpful for the certification and use of copper tube induction brazing welding process assessment.

[0083] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0084] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0085] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0086] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A method for obtaining copper tube welding parameters, characterized in that: include: Step S10: Obtain a first length verification copper tube of the same specification as the copper tube required for actual welding, and divide the verification copper tube into a plurality of adjacent verification zones, defining the verification zones as zone 1, zone 2, ..., zone M, zone M+1, ..., zone M+S, ..., zone N in sequence along the axis of the verification copper tube; Step S20: performing a first verification step on the first zone while the verification copper tube is in a non-ventilated state; The first verification step includes heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes within the first temperature interval, the time T including the first temperature node time T1, the second temperature node time T2, ..., the Sth temperature node time TS; Step S30, introducing protective gas into the verification copper tube in sequence according to a preset flow gradient, and performing the second verification step on S adjacent verification areas in sequence at different flow rates; The second verification step includes: heating the Mth area to the M+Sth area respectively, with the heating times being T1, T2, ..., TS respectively; Step S40: Obtain oxidation information in the verification copper tube, and generate a welding parameter comparison table for the current verification copper tube based on the oxidation information; Step S50: Based on the welding parameter comparison table, obtain the welding parameters of the current copper pipe welding.

2. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: In step S10, the lengths of adjacent verification areas are the same.

3. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: In step S20 and step S30, when heating the verification copper tube, the process includes: An open induction heating coil is used, and the heating coil is sleeved on the corresponding verification area of ​​the verification copper tube, and the heating power of the induction heating coil is constant during heating.

4. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: The first temperature zone ranges from 650°C to 800°C.

5. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: The length of the verification area is 100 mm.

6. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: The initial flow rate of the protective gas is 10 L / min.

7. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: In the step S30, when heating the adjacent verification area, the subsequent verification area should be heated after the temperature of the verification copper tube drops to room temperature.

8. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: In the step 40, it includes: Step S410: Divide the verification copper tube into two along a plane including its axis; Step S420: Obtain image data of the inner wall of the verification copper tube, input the image data into a trained neural network recognition model, and obtain the oxidation degree at different positions based on the neural network recognition model analysis; Step S430: outputting the color difference ΔE of different verification areas according to the level of oxidation, wherein the range of the color difference ΔE is 1 to 20; Step S440: Based on the color difference ΔE, a welding parameter comparison table for the current verification copper pipe is generated.

9. The method for obtaining copper pipe welding parameters according to claim 1, characterized in that: In the step S430, it includes: The colors of the oxidized areas of different levels and the unoxidized substrate are converted to the CIELAB space, and the color difference ΔE is calculated: Among them, L* is the brightness factor, which represents the lightness or darkness of the color; a* is the red-green axis chromaticity coordinate; and b* is the blue-yellow axis chromaticity coordinate.

10. A system capable of executing the method for obtaining copper pipe welding parameters according to any one of claims 1 to 9, characterized in that: include: a raw material preparation module, which is used to obtain a first length verification copper tube of the same specification as the copper tube required for actual welding, and divide the verification copper tube into a plurality of adjacent verification zones, and define the verification zones in sequence along the axis direction of the verification copper tube as zone 1, zone 2, ..., zone M, zone M+1, ..., zone M+S, ..., zone N; a first verification module, configured to perform a first verification step on the first zone when the verification copper tube is in a non-ventilated state; The first verification step includes heating the first zone and recording the time T when the temperature of the first zone reaches different temperature nodes within the first temperature interval, the time T including the first temperature node time T1, the second temperature node time T2, ..., the Sth temperature node time TS; A second verification module, which is used to sequentially introduce protective gas into the verification copper tube according to a preset flow gradient, and sequentially perform a second verification step on S adjacent verification areas at different flow rates; The second verification step includes: heating the Mth area to the M+Sth area respectively, with the heating times being T1, T2, ..., TS respectively; A data processing module, which is used to obtain oxidation information in the verification copper tube and generate a welding parameter comparison table of the current verification copper tube based on the oxidation information; The data output module is used to obtain the welding parameters of the current copper pipe based on the welding parameter comparison table.

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