Welding extrusion adjusting method and device for high-frequency welded pipe and storage medium
By measuring the difference in circumference of the tube blank before and after welding and the micro-geometric morphology parameters of the weld, the problem of inaccurate measurement of welding extrusion amount was solved, and the precise adjustment of the high-frequency welded pipe welding process and the improvement of weld quality were realized.
Patent Information
- Application Number
- CN202610250447.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-03
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing high-frequency welded pipe welding process, the measurement method of welding extrusion cannot be accurately adjusted, which may lead to problems such as oxide inclusions and uneven morphology in the weld.
By measuring the difference in circumference of the tube blank before and after welding, and combining the micro-geometric morphology parameters of the weld, such as weld width, fusion line width and microstructure, the optimal weld parameters are determined, and the extrusion deformation and process parameters are adjusted according to these parameters.
It enables precise adjustment of welding extrusion amount, improves the stability of the welding process and the quality of the weld, and ensures that the mechanical properties of the weld meet the standards.
Smart Images
Figure CN122033407A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welded pipe welding, specifically to a welding extrusion adjustment method, equipment, and storage medium for high-frequency welded pipes. Background Technology
[0002] Welding extrusion amount refers to the degree of extrusion deformation of the metal at the weld seam when the edge of the tube blank is heated and passes through the extrusion roller during the production process of high-frequency welded pipe.
[0003] High-frequency welded pipe welding process utilizes the skin effect and proximity effect of high-frequency current to heat the edges of the formed pipe blank to a molten state. The molten plate edges are then squeezed together by the application of extrusion pressure by welding extrusion rollers. Therefore, the welding extrusion amount is an important key parameter for measuring the quality of high-frequency welding, and it will directly affect the performance of the weld after welding.
[0004] The existing method for measuring welding extrusion amount is to determine the extrusion amount by measuring the difference between the circumference of the tube blank before entering the extrusion roll and the circumference after passing through the extrusion roll, and then adjust the control range of process parameters accordingly.
[0005] Determining the extrusion amount by measuring the difference in circumference between the front and back of the extrusion roller is an indirect method. This method cannot determine whether the extrusion amount is appropriate (improper extrusion amount can lead to problems such as residual oxide inclusions in the weld and uneven weld morphology), and therefore cannot make precise adjustments to the extrusion amount. Summary of the Invention
[0006] In view of the deficiencies in the existing technology, the technical problem solved by the present invention is: how to improve the adjustment accuracy of the welding extrusion amount of high-frequency welded pipe.
[0007] To achieve the above objectives, in a first aspect, embodiments of this application provide a welding extrusion adjustment method for high-frequency welded pipes, the method comprising the following steps: Determine the amount of extrusion deformation before and after welding extrusion; Based on the weld parameters corresponding to the extrusion deformation, determine the correspondence between the extrusion deformation and the weld parameters; The optimal weld parameters are determined by adjusting the amount of extrusion deformation. Based on the correspondence between the extrusion deformation and the weld parameters, the optimal extrusion deformation corresponding to the optimal weld parameters is determined; the welding parameters are then adjusted based on the optimal extrusion deformation.
[0008] In conjunction with the first aspect, in one embodiment, the extrusion deformation is the difference δ between the circumference of the tube blank before and after welding extrusion, and the calculation formula is: δ = C2 - C1, where C1 represents the circumference of the tube blank before welding extrusion and C2 represents the circumference of the tube blank after welding extrusion.
[0009] In conjunction with the first aspect, in one embodiment, the weld parameters include: The transverse uniformity parameter of the weld is used to determine whether the weld is uniform and symmetrical. The weld fusion line width consistency parameter used to determine whether the weld size is uniform; Quantitative characterization of weld microstructure used to determine whether foreign matter exists in the weld; Weld mechanical property characterization used to evaluate the mechanical properties of welds.
[0010] In conjunction with the first aspect, in one embodiment, the weld transverse uniformity parameter includes the weld width. When the weld is basically drum-shaped, the weld width includes the upper width of the drum, the middle width of the drum, and the lower width of the drum. The weld fusion line width consistency parameter includes the width of the weld fusion line; The quantitative characterization of the weld microstructure is obtained based on the weld microstructure; The mechanical properties of the weld are characterized by mechanical property testing of the weld.
[0011] In conjunction with the first aspect, in one embodiment, the mechanical performance test includes a flattening test, a tensile test, a Charpy impact test, and a non-destructive test.
[0012] In conjunction with the first aspect, in one embodiment, the optimal weld parameters are: The basic uniform and symmetrical weld width, the weld fusion line width with basically uniform weld size, the weld microstructure quantitative characterization with basically no foreign matter in the weld, and the weld mechanical properties characterization with basically qualified mechanical properties.
[0013] In conjunction with the first aspect, in one embodiment, the process of adjusting welding parameters according to the optimal extrusion deformation includes: determining the actual extrusion deformation; determining the actual weld parameters corresponding to the actual extrusion deformation based on the correspondence between the extrusion deformation and weld parameters; and adjusting the extrusion roller gap according to the optimal extrusion deformation corresponding to the optimal weld parameters when the difference between the actual weld parameters and the optimal weld parameters exceeds a specified threshold.
[0014] In conjunction with the first aspect, in one embodiment, the process for obtaining the weld parameters corresponding to the extrusion deformation includes: preparing a metallographic specimen of the weld and obtaining the weld parameters of the metallographic specimen.
[0015] Secondly, embodiments of this application provide a welding extrusion adjustment device for high-frequency welded pipes. The high-frequency welded pipe welding extrusion adjustment device includes a processor, a memory, and a high-frequency welded pipe welding extrusion adjustment program stored in the memory and executable by the processor. When the high-frequency welded pipe welding extrusion adjustment program is executed by the processor, the method provided in the first aspect is implemented.
[0016] Thirdly, embodiments of this application provide a computer-readable storage medium storing a welding extrusion adjustment program for a high-frequency welded pipe, wherein the computer program, when executed, implements the method provided in the first aspect.
[0017] Compared with the prior art, the advantages of this application are: This application uses the microscopic geometric morphology (weld parameters) of the weld to accurately determine whether the extrusion amount of the weld is appropriate, and uses this to guide the macroscopic mechanical adjustment of process parameters. This can achieve precise adjustment of the extrusion amount in high-frequency welding, improve the stability of the welding process, facilitate the monitoring of process parameters during the welding process, improve weld quality, and effectively ensure that the comprehensive mechanical properties of the weld meet the requirements of pipe manufacturing standards. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of high-frequency welded pipe welding in an embodiment of this application; Figure 2 is a schematic diagram of the microstructure of the weld seam of the high-frequency welded pipe in the embodiment of this application; Figure 3 This is a schematic diagram of the welding extrusion adjustment method for high-frequency welded pipe in the embodiments of this application; Figure 4 This is a schematic diagram of the hardware structure of the high-frequency welded pipe welding extrusion adjustment device involved in the embodiments of this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.
[0022] First, the research and development principles in this application will be introduced.
[0023] See Figure 1 As shown, before the precision-formed welded pipe enters the extrusion roller, the edge of the pipe blank is in an open state. After passing through the high-frequency welding contact electrode and the extrusion roller, the edge of the pipe blank is heated and welded together to form a weld.
[0024] Referring to Figure 2, the weld seam is shaped like a "drum," wider at both ends and narrower in the middle. A thin straight line runs along the wall thickness from the center of the drum; this is the weld fusion line. The weld fusion line represents the amount of molten metal remaining after passing through the extrusion rollers, and its width accurately reflects the amount of extrusion. The ultimate goal of adjusting the welding extrusion amount is to control the content of residual molten metal in the weld seam within a reasonable range after extrusion. This ensures that inclusions such as oxides generated during welding are fully extruded from the weld seam, while preventing excessive extrusion that could completely squeeze out the molten metal, leading to quality defects such as cold welds or incomplete welds, thus guaranteeing the weld seam's performance.
[0025] Based on this, in order to make the objectives, technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0026] In a first aspect, embodiments of this application provide a welding extrusion adjustment method for high-frequency welded pipes, the steps of which include: Determine the amount of extrusion deformation before and after welding extrusion; Based on the weld parameters corresponding to the extrusion deformation, determine the correspondence between the extrusion deformation and the weld parameters; The optimal weld parameters are determined by adjusting the amount of extrusion deformation; the optimal extrusion deformation corresponding to the optimal weld parameters is determined based on the correspondence between the amount of extrusion deformation and the weld parameters; and the welding parameters are adjusted based on the optimal extrusion deformation.
[0027] Therefore, this application accurately determines whether the extrusion amount of the weld is appropriate by analyzing the micro-geometric morphology (weld parameters) of the weld, and uses this to guide the macro-mechanical adjustment of process parameters. This can achieve precise adjustment of the high-frequency welding extrusion amount, improve the stability of the welding process, facilitate the monitoring of process parameters during the welding process, improve weld quality, and effectively ensure that the comprehensive mechanical properties of the weld meet the requirements of pipe manufacturing standards.
[0028] In one embodiment, the above-mentioned extrusion deformation is the difference δ between the circumference of the tube blank before and after welding extrusion, and the calculation formula is: δ = C2 - C1, where C1 represents the circumference of the tube blank before welding extrusion (i.e. before entering the extrusion roller after precision forming), and C2 represents the circumference of the tube blank after welding extrusion (i.e. after being extruded by the extrusion roller).
[0029] In one embodiment, the process for obtaining the weld parameters corresponding to the extrusion deformation includes: preparing a metallographic sample of the weld, the sample being taken from the weld after normal heat treatment, the purpose of which is to calibrate the micro-geometry of the weld; and obtaining the weld parameters of the metallographic sample.
[0030] In one embodiment, the weld parameters include: (1) The weld transverse uniformity parameter used to determine whether the macroscopic morphology of the weld is uniform and symmetrical; the weld transverse uniformity parameter is the weld width. When the weld is basically in the shape of a waist drum (find the waist drum position on the weld metallographic specimen), the weld width includes the upper width of the waist drum, the middle width of the waist drum and the lower width of the waist drum.
[0031] (2) The weld fusion line width consistency parameter used to determine whether the weld size is uniform; this parameter is the width of the weld fusion line, which is obtained by finding the weld position under a metallographic microscope.
[0032] (3) The weld micromorphology quantitative characterization used to determine whether there are foreign objects (such as oxide inclusions) that have not been extruded in the weld is obtained based on the microstructure of the weld.
[0033] (4) The mechanical properties characterization of the weld used to evaluate the mechanical properties of the weld is obtained by testing the mechanical properties of the weld.
[0034] Specifically, mechanical performance tests include flattening tests, tensile tests, Charpy impact tests, and non-destructive tests.
[0035] Furthermore, the optimal weld parameters mentioned above are: The macroscopic morphology of the weld is characterized by uniform and symmetrical weld width, uniform weld fusion line width, and the absence of foreign matter in the weld microstructure, as well as the mechanical properties of the weld meeting the standards.
[0036] In one embodiment, the process of adjusting welding parameters based on the optimal extrusion deformation includes: determining the actual extrusion deformation; determining the actual weld parameters corresponding to the actual extrusion deformation based on the correspondence between the extrusion deformation and weld parameters; and adjusting the extrusion roller gap based on the optimal extrusion deformation corresponding to the optimal weld parameters when the difference between the actual weld parameters and the optimal weld parameters exceeds a specified threshold.
[0037] See below. Figure 3As shown, the above method is illustrated through a specific embodiment.
[0038] S1: Measure the circumference C1 of the tube blank after finishing and before entering the extrusion rollers, and the circumference C2 of the tube blank after the extrusion rollers and after the burrs have been removed; C1 is used to calibrate the circumference of the welded pipe blank before extrusion; C2 is used to calibrate the circumference of the welded pipe blank after extrusion.
[0039] S2: The difference in tube blank circumference δ is obtained based on C1 and C2. Its function is to calibrate the macroscopic mechanical adjustment data of welding extrusion amount.
[0040] S3: Prepare metallographic specimens of the weld. The specimens are taken from the weld after normal heat treatment. Their purpose is to determine the micro-geometry of the weld.
[0041] S4: Determine and store the weld parameters of the metallographic specimen, as well as the correspondence between the difference in circumference to the tube blank and the weld parameters; the weld parameters include the weld width (obtained by finding the waist drum position on the weld metallographic specimen), the width of the weld fusion line (obtained by finding the weld position under a metallographic microscope), the quantitative characterization of the weld microstructure (obtained based on the weld microstructure), and the characterization of the weld mechanical properties (obtained by conducting mechanical property tests on the weld).
[0042] S5: Determine whether the weld parameters are optimal (see above for the definition of optimal weld parameters): If so, it means no adjustment is needed. Store the optimal billet circumference difference corresponding to the optimal weld parameters and go to S6. If not, adjust the tube blank circumference difference by changing the gap between the extrusion rollers and then reform the weld seam, then proceed to S3.
[0043] S6: When welding pipes again, determine the actual weld parameters corresponding to the actual pipe blank circumference difference based on the correspondence between the pipe blank circumference difference and the weld parameters; when the actual weld parameters and the optimal weld parameters exceed the specified threshold, adjust the extrusion roller gap based on the difference between the actual pipe blank circumference and the optimal pipe blank circumference difference.
[0044] Secondly, embodiments of this application provide a device for adjusting the welding extrusion amount of a high-frequency welded pipe. The device for adjusting the welding extrusion amount of a high-frequency welded pipe can be a device with data processing capabilities, such as a personal computer (PC), a laptop computer, or a server.
[0045] Reference Figure 4 , Figure 4This is a schematic diagram of the hardware structure of the high-frequency welded pipe welding extrusion adjustment device involved in the embodiments of this application. In the embodiments of this application, the high-frequency welded pipe welding extrusion adjustment device may include a processor, a memory, a communication interface, and a communication bus.
[0046] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.
[0047] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces are used for interconnecting internal components of the high-frequency welded pipe welding extrusion adjustment device, as well as for interconnecting the device with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.
[0048] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.
[0049] The processor can be a general-purpose processor, which can call the adjustment program for the welding extrusion amount of the high-frequency welded pipe stored in the memory and execute the welding extrusion adjustment method for the high-frequency welded pipe provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the adjustment program for the welding extrusion amount of the high-frequency welded pipe is called can refer to the various embodiments of the welding extrusion adjustment method for the high-frequency welded pipe of this application, and will not be repeated here.
[0050] Those skilled in the art will understand that Figure 4 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0051] Thirdly, embodiments of this application also provide a computer-readable storage medium.
[0052] The computer-readable storage medium of this application stores an adjustment program for the welding extrusion amount of a high-frequency welded pipe, wherein when the adjustment program for the welding extrusion amount of the high-frequency welded pipe is executed by a processor, the steps of the welding extrusion adjustment method for the high-frequency welded pipe as described above are implemented.
[0053] The method implemented when the welding extrusion amount adjustment procedure of the high-frequency welded pipe is executed can be referred to in the various embodiments of the welding extrusion adjustment method of the high-frequency welded pipe of this application, and will not be repeated here.
[0054] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0055] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.
[0056] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.
[0057] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.
[0058] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.
[0059] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.
[0060] The above are merely specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.
Claims
1. A method for adjusting the welding extrusion of a high-frequency welded pipe, characterized in that, The method includes the following steps: Determine the amount of extrusion deformation before and after welding extrusion; Based on the weld parameters corresponding to the extrusion deformation, determine the correspondence between the extrusion deformation and the weld parameters; The optimal weld parameters are determined by adjusting the amount of extrusion deformation. Based on the correspondence between the extrusion deformation and the weld parameters, the optimal extrusion deformation corresponding to the optimal weld parameters is determined; the welding parameters are then adjusted based on the optimal extrusion deformation.
2. The welding extrusion adjustment method for high-frequency welded pipes as described in claim 1, characterized in that: The extrusion deformation is the difference δ between the circumference of the tube blank before and after welding extrusion. The calculation formula is: δ = C2 - C1, where C1 represents the circumference of the tube blank before welding extrusion and C2 represents the circumference of the tube blank after welding extrusion.
3. The welding extrusion adjustment method for high-frequency welded pipes as described in claim 1, characterized in that, The weld parameters include: The transverse uniformity parameter of the weld is used to determine whether the weld is uniform and symmetrical. The weld fusion line width consistency parameter used to determine whether the weld size is uniform; Quantitative characterization of weld microstructure used to determine whether foreign matter exists in the weld; Weld mechanical property characterization used to evaluate the mechanical properties of welds.
4. The welding extrusion adjustment method for high-frequency welded pipes as described in claim 3, characterized in that: The weld transverse uniformity parameter includes the weld width. When the weld is basically drum-shaped, the weld width includes the upper width of the drum, the middle width of the drum, and the lower width of the drum. The weld fusion line width consistency parameter includes the width of the weld fusion line; The quantitative characterization of the weld microstructure is obtained based on the weld microstructure; The mechanical properties of the weld are characterized by mechanical property testing of the weld.
5. The welding extrusion adjustment method for high-frequency welded pipes as described in claim 4, characterized in that: The mechanical performance tests include flattening tests, tensile tests, Charpy impact tests, and non-destructive tests.
6. The welding extrusion adjustment method for high-frequency welded pipes as described in claim 4, characterized in that, The optimal weld parameters are: The basic uniform and symmetrical weld width, the weld fusion line width with basically uniform weld size, the weld microstructure quantitative characterization with basically no foreign matter in the weld, and the weld mechanical properties characterization with basically qualified mechanical properties.
7. The welding extrusion adjustment method for high-frequency welded pipes as described in any one of claims 1 to 6, characterized in that, The process of adjusting welding parameters based on the optimal extrusion deformation includes: determining the actual extrusion deformation; determining the actual weld parameters corresponding to the actual extrusion deformation based on the correspondence between the extrusion deformation and weld parameters; and adjusting the extrusion roller gap based on the optimal extrusion deformation corresponding to the optimal weld parameters when the difference between the actual weld parameters and the optimal weld parameters exceeds a specified threshold.
8. The welding extrusion adjustment method for high-frequency welded pipes as described in any one of claims 1 to 6, characterized in that, The process for obtaining the weld parameters corresponding to the extrusion deformation includes: preparing a metallographic specimen of the weld and obtaining the weld parameters of the metallographic specimen.
9. A welding extrusion adjustment device for high-frequency welded pipes, characterized in that, The high-frequency welded pipe welding extrusion adjustment device includes a processor, a memory, and a high-frequency welded pipe welding extrusion adjustment program stored in the memory and executable by the processor, wherein when the high-frequency welded pipe welding extrusion adjustment program is executed by the processor, the steps of the high-frequency welded pipe welding extrusion adjustment method as described in any one of claims 1 to 8 are implemented.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a welding extrusion adjustment program for a high-frequency welded pipe, wherein when the welding extrusion adjustment program for the high-frequency welded pipe is executed, the steps of the welding extrusion adjustment method for a high-frequency welded pipe as described in any one of claims 1 to 8 are implemented.