Stainless steel pipe welding deformation self-adaptive regulation system based on intelligent monitoring

Abstract

This invention relates to the field of welding technology, and more particularly to an adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring. The system includes multiple floating constraint blocks, evenly distributed circumferentially around the stainless steel pipe. Each floating constraint block applies radial pressure to the outer surface of the stainless steel. The pressure of each floating constraint block is independently adjusted based on real-time monitoring of the stainless steel pipe's deformation. The adjustment rate of each floating constraint block is consistent and proportional to the variance of the deformation results at each location. This invention independently adjusts the pressure of each floating constraint block by real-time monitoring of the circumferential deformation of the stainless steel pipe. By ensuring that the adjustment rate of each floating constraint block is consistent and proportional to the variance of the deformation results at each location, the overall response speed is dynamically adjusted while maintaining synchronization. This avoids secondary deformation caused by stress imbalance, more promptly suppresses welding deformation, improves welding dimensional accuracy, and reduces residual stress concentration.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to an adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring. Background Technology

[0002] In the stainless steel pipe prefabrication production line, the welding process is one of the core links. Due to the material characteristics of stainless steel pipes, they are subjected to welding heat cycle during the welding process, which will generate uneven thermal stress in the welding area, thus causing various welding deformations, mainly including circumferential ellipticity deviation, angular deformation, radial shrinkage, etc.

[0003] In existing technologies, the control of welding deformation of stainless steel pipes is mostly achieved by using fixed restraint fixtures, that is, by using preset pressure blocks and clamps to fix and constrain the welding area of ​​the pipe to limit the occurrence of deformation.

[0004] However, this type of fixed restraint method has obvious defects. It cannot adapt to the welding requirements of stainless steel pipes with different diameters and wall thicknesses during the working process. When changing pipe specifications, tooling needs to be changed frequently, resulting in poor adaptability and affecting production efficiency. The fixed restraint force cannot be adjusted according to the real-time deformation during the welding process. The instantaneous deformation caused by welding thermal stress cannot be offset in time, which can easily lead to insufficient dimensional accuracy of the welded joint and concentration of welding residual stress.

[0005] Currently, radial deformation monitoring during the welding process of stainless steel pipes can be achieved in real time using several laser scanning diameter gauges distributed along the circumference of the stainless steel pipe. However, in actual implementation, the data obtained from monitoring is only used as a basis for evaluating the final product quality and cannot be used for real-time guidance on deformation control during the production process. Summary of the Invention

[0006] This invention provides an adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: it includes multiple floating constraint blocks, and each of the floating constraint blocks is evenly distributed along the circumference of the stainless steel tube; The floating constraint blocks apply pressure to the outer surface of the stainless steel in the radial direction. The pressure of each floating constraint block is adjusted independently, and the independent adjustment is based on the deformation results of the stainless steel tube monitored in real time. The adjustment rate of each floating constraint block is consistent, and the adjustment rate is proportional to the variance of the deformation result at each location.

[0008] In some embodiments of the present invention, the pressure source of the floating constraint pressure block is a hydraulic cylinder, and the hydraulic cylinders corresponding to each floating constraint pressure block adopt the same hydraulic station.

[0009] In some embodiments of the present invention, the initial pressure of the floating constraint block is output through a deep learning model, the deep learning model comprising: Input layer: Input the three-dimensional data of the stainless steel pipe; In the hidden layer, the geometric feature matrix of the three-dimensional data is extracted, the yield strength parameter is expanded into a material feature matrix with the same dimension as the geometric features, and the geometric feature matrix and the material feature matrix are superimposed element by element to obtain a fused feature matrix. The first output layer outputs the recommended value for the initial pressure; The training objective of the deep learning model is to minimize the mean square error between the predicted initial pressure and the actual optimal pressure.

[0010] In some embodiments of the present invention, the deep learning model further includes a second output layer; The second output layer outputs a rate limit value. When the adjustment rate is greater than the rate limit value, the adjustment rate is replaced with the rate limit value.

[0011] In some embodiments of the present invention, the pressure adjustment direction of each floating constraint block is determined according to the deformation direction of its corresponding position; when the deformation at the corresponding position is toward the floating constraint block, the pressure of the corresponding floating constraint block is increased; when the deformation at the corresponding position is away from the floating constraint block, the pressure of the corresponding floating constraint block is decreased; when the deformation at the corresponding position is zero, the original pressure of the corresponding floating constraint block is maintained unchanged.

[0012] In some embodiments of the present invention, for each set of multi-point data corresponding to a set of deformation results received, each floating constraint block synchronously adjusts its pressure according to the deformation direction at the corresponding position.

[0013] In some embodiments of the present invention, each of the floating constraint blocks has an arc-shaped pressing surface adapted to the outer wall of the stainless steel tube on the side facing the stainless steel tube, and a high-temperature resistant elastic buffer layer is provided on the arc-shaped pressing surface.

[0014] In some embodiments of the present invention, an annular support frame is further provided on the outer periphery of the stainless steel pipe, and each of the hydraulic cylinders is fixedly connected to the annular support frame at circumferential intervals along the annular support frame, and each of the floating constraint pressure blocks is respectively provided at the output end of the corresponding hydraulic cylinder.

[0015] In some embodiments of the present invention, the annular support frame is a segmented structure, and multiple segmented support members are sequentially connected along the circumference of the stainless steel tube to form the annular support frame.

[0016] In some embodiments of the present invention, each of the floating constraint blocks is connected to the output end of the corresponding hydraulic cylinder through a ball joint, each of the floating constraint blocks is a detachable and replaceable structure, and the curvature of the arc-shaped pressing surface of different floating constraint blocks is adapted to the outer wall of stainless steel pipes of different diameters.

[0017] The technical solution of this invention can achieve the following technical effects: This invention involves evenly distributing multiple floating constraint blocks along the circumference of a stainless steel pipe and independently adjusting the pressure of each floating constraint block by monitoring the deformation of the stainless steel pipe in real time. This allows for differentiated constraint compensation at different circumferential positions for the corresponding deformation state, thereby directly introducing deformation monitoring data, which is only used for post-weld quality evaluation in the prior art, into the real-time control process of welding, and achieving dynamic suppression of welding deformation. By keeping the adjustment rate of each floating constraint block consistent and making the adjustment rate proportional to the variance of the deformation results at each location, the overall response speed is dynamically adjusted according to the dispersion of the deformation distribution at each location along the circumference of the stainless steel pipe, while ensuring that the adjustment rhythm of each block is synchronized. This avoids the problems of force imbalance and secondary deformation caused by asynchronous adjustment of each block.

[0018] This invention can more promptly counteract local instantaneous deformation caused by welding thermal stress, improve targeted control of deformation at different locations, and take into account the overall stress coordination. It is beneficial to reduce the dimensional deviation of the welded joint, reduce the concentration of residual stress in the weld area, suppress ellipticity deviation and local deformation accumulation, and at the same time improve the adaptability of the device to welding conditions of stainless steel pipes of different specifications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the structure of the stainless steel pipe welding deformation adaptive control system based on intelligent monitoring in an embodiment of the present invention; Figure 2 This is a side view of the structure of the stainless steel pipe welding deformation adaptive control system based on intelligent monitoring in an embodiment of the present invention; Figure 3 As described in the embodiments of the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the structure in which the floating constraint block moves toward the stainless steel tube in an embodiment of the present invention; Figure 5 This is a flowchart of the stainless steel pipe welding deformation adaptive control system based on intelligent monitoring in an embodiment of the present invention.

[0021] Reference numerals: 01, stainless steel pipe; 1, annular support frame; 2, floating constraint block; 21, arc-shaped pressing surface; 3, hydraulic cylinder body; 31, ball head. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] like Figures 1 to 5 The stainless steel pipe 01 welding deformation adaptive control system based on intelligent monitoring shown includes, as follows: Figures 1 to 4 The multiple floating constraint blocks 2 shown are evenly distributed along the circumference of the stainless steel tube 01. "Evenly distributed along the circumference" means that the multiple floating constraint blocks 2 are evenly spaced around the outer circumference of the stainless steel tube 01, so that each floating constraint block 2 corresponds to a different position on the circumference of the stainless steel tube 01, enabling zoned control of the deformation state of different parts of the stainless steel tube 01. The floating constraint block 2 is an actuator that can move towards or away from the stainless steel tube 01 and apply constraint force to the outer surface of the stainless steel tube 01.

[0024] like Figure 1 , Figure 2 As shown, the floating constraint blocks 2 apply radial pressure to the outer surface of the stainless steel. The pressure of each floating constraint block 2 is independently adjustable, based on the real-time monitored deformation of the stainless steel tube 01. It should be noted that the floating constraint blocks 2 can be driven in various ways, including hydraulically, pneumatically, electrically, or otherwise. Furthermore, the floating constraint blocks 2 can be installed in various ways, such as fixedly on a support frame, or on a guide seat, slide rail, or other mounting structures that limit their movement towards or away from the stainless steel tube 01. Finally, the connection between the floating constraint blocks 2 and the pressure source can be a rigid fixed connection, a hinged connection, a ball joint connection 31, or other possible connection structures.

[0025] The adjustment rate of each floating constraint block 2 is consistent, and the adjustment rate is proportional to the variance of the deformation results at each location.

[0026] The deformation results are used to characterize the external deformation of the stainless steel pipe 01 during the welding process relative to its initial state before welding. These deformations may include, but are not limited to, parameters reflecting the degree of welding deformation such as circumferential ellipticity deviation, local outward convexity, local inward concavity, and radial shrinkage. This invention is based on deformation results obtained in real time, which can be achieved using a laser scanning diameter gauge employed in current technology. The circumferentially distributed, axially measured method allows for the acquisition of corresponding multi-point data sets according to a set data acquisition frequency. However, the method of obtaining the deformation results is not intended to limit the scope of this invention.

[0027] In the specific implementation process, such as Figure 5 As shown, the initial shape data of the stainless steel pipe 01 before welding can be obtained first as reference data. During the welding process, the current deformation data of multiple circumferential positions of the stainless steel pipe 01 is acquired in real time according to a preset sampling frequency, and the current deformation data is compared with the reference data to obtain the deformation result of each corresponding position. The control system determines the pressure adjustment requirement of the floating constraint block 2 corresponding to each position based on the deformation result of each position. This allows different circumferential positions to obtain differentiated adjustments according to their respective deformation states, thereby avoiding the control lag and local imbalance problems caused by the traditional fixed restraint method relying on only a single constant constraint.

[0028] This invention enables dynamic adjustment of the restraint force. One set of tooling can be adapted to the welding of stainless steel pipes with different diameters and wall thicknesses, thereby reducing tooling change time. Based on deformation data, closed-loop feedback is achieved, which can quickly respond to and dynamically adjust the restraint force. The dynamic restraint force offsets the peak value of welding thermal stress, which can reduce the residual stress in the weld area, thereby avoiding the risk of intergranular corrosion caused by stress concentration.

[0029] In this invention, the adjustment rate of each floating constraint block 2 is uniformly adjusted based on the variance of the deformation result. This avoids secondary deformation caused by asynchronous adjustment of multiple floating constraint blocks 2, and dynamically adjusts the control speed according to the uniformity of deformation. This prevents the pipeline from becoming unbalanced due to some blocks adjusting too fast and others too slow, which could lead to new secondary deformations such as bending and ellipticity deviation. The variance of the deformation result directly reflects the uniformity of deformation at all points in the circumference of the stainless steel pipe 01. The larger the variance, the more significant the difference in circumferential deformation. In this case, simultaneously increasing the adjustment rate of each block can quickly respond to the difference in deformation and promptly offset the deformation at each point through independent pressure adjustment, avoiding excessive accumulation of local deformation. The smaller the variance, the more uniform the circumferential deformation. In this case, simultaneously decreasing the adjustment rate can avoid the increase in residual stress caused by over-control, balancing control accuracy and stress control.

[0030] During the welding process of stainless steel pipe 01, if multiple floating constraint blocks 2 are driven by independent power sources, problems such as pressure fluctuations, flow differences, response delays, and inconsistent control accuracy between different power sources can easily arise. The pressure-applying power source for the floating constraint blocks 2 is a hydraulic cylinder 3, and the hydraulic cylinder 3 corresponding to each floating constraint block 2 uses the same hydraulic station. This effectively avoids inconsistencies in the extension and retraction rates of the hydraulic cylinders 3 caused by differences in equipment accuracy, pressure fluctuations, and flow deviations among multiple independent hydraulic stations. In some embodiments of the present invention, centralized management achieved by the same hydraulic station includes, but is not limited to, oil supply, pressure regulation, and temperature control, which effectively avoids problems such as oil contamination, pressure fluctuations, and temperature imbalances caused by the dispersed layout of multiple independent hydraulic stations.

[0031] In actual implementation scenarios, the stainless steel pipe 01 has passed quality inspection before welding. That is, in the embodiments of the present invention, deformation only occurs during the welding process. Based on this requirement, the initial pressure of the floating constraint block 2 needs to be set according to the stainless steel pipe 01. This initial pressure serves as the reference pressure for subsequent independent adjustment. As a preferred embodiment, the initial pressure of the floating constraint block 2 is output through a deep learning model. The deep learning model includes: Input layer: Input the 3D data of stainless steel pipe 01; The hidden layer extracts the geometric feature matrix of the 3D data, expands the yield strength parameter into a material feature matrix with the same dimension as the geometric features, and then superimposes the geometric feature matrix and the material feature matrix element by element to obtain the fused feature matrix. The first output layer outputs the recommended value for the initial pressure; The training objective of a deep learning model is to minimize the mean square error between the predicted initial pressure and the actual optimal pressure.

[0032] In some embodiments of the present invention, the three-dimensional data is obtained based on scanning of the actual stainless steel pipe 01; specifically, it is acquired in real time by a circumferential laser scanner at the installation station, and the point cloud-mesh conversion generates curved surface geometric features. The same acquisition and generation results can be used for the same batch of stainless steel pipes 01. During implementation, precise initial pressure ensures that each floating constraint block 2 is in an optimal stress state at the initial stage of welding, which, combined with subsequent independent pressure adjustment and synchronous rate control based on real-time deformation, achieves optimal deformation control results.

[0033] In this preferred embodiment, by element-wise superimposing the geometric feature matrix and the material feature matrix of the same dimension, cross-parameter coupled modeling of the physical morphology and material properties of the pipe fitting is achieved. This allows the initial pressure recommendation value to simultaneously respond to comprehensive factors such as wall thickness distribution, curvature change and yield strength, thereby improving the pressure matching accuracy.

[0034] In the adaptive control of welding deformation, although increasing the adjustment rate of the floating constraint block 2 based on the variance of the deformation results at various locations helps to respond more quickly to local deformation differences, if the adjustment rate only increases with the degree of deformation dispersion without an upper limit constraint, problems such as excessively fast execution and excessive pressure adjustment may occur under conditions of sudden increase in local deformation, short-term fluctuations in monitoring data, or high system response. The deep learning model also includes a second output layer; The second output layer outputs the rate limit value. When the adjustment rate exceeds the rate limit value, the adjustment rate is replaced with the rate limit value. Rate control not only adaptively changes based on the variance of real-time deformation results but is also subject to an upper limit constraint that matches the current pipe fitting characteristics and operating conditions. This retains the ability to quickly respond to deformation differences under large variance conditions while avoiding execution shocks and control instability problems caused by excessively high adjustment rates.

[0035] Due to uneven heat input and diffusion during welding, local deformations of varying directions and degrees often occur at different locations along the circumference of the pipe. In some embodiments of the present invention, the pressure adjustment direction of each floating constraint block 2 is determined according to the deformation direction at its corresponding location; when the deformation at the corresponding location is towards the floating constraint block 2, the pressure of the corresponding floating constraint block 2 is increased; when the deformation at the corresponding location is away from the floating constraint block 2, the pressure of the corresponding floating constraint block 2 is decreased; when the deformation at the corresponding location is zero, the original pressure of the corresponding floating constraint block 2 is maintained unchanged. The present invention can implement targeted pressure increase, pressure decrease, or constant control according to the deformation direction at different locations, making the function of each floating constraint block 2 more closely match the actual deformation evolution law during the welding process of stainless steel pipe 01, thereby improving the accuracy and timeliness of local control, reducing the accumulation of local deformation and the resulting dimensional deviations.

[0036] During the welding process of stainless steel pipe 01, the circumferential deformation changes continuously with the welding thermal cycle. If the pressure adjustment time of each floating constraint block 2 is independent and the update cycle is inconsistent, it is easy for some positions to be adjusted while other positions remain in the original state. This will result in the circumferential force being uncoordinated at the same time, which will not only weaken the overall deformation suppression effect, but may also cause new bending, ellipticity deviation or other secondary deformation due to sudden changes in local force.

[0037] For each set of deformation results received, each floating constraint block 2 synchronously adjusts its pressure according to the deformation direction at its corresponding position. This ensures that each pressure update is based on the overall deformation distribution at the same moment. This invention enables a one-to-one closed-loop relationship between the monitoring and control processes, guaranteeing coordinated action of each floating constraint block 2 within the same adjustment cycle. This improves the consistency and integrity of circumferential multi-point control, avoiding localized force imbalances caused by inconsistent update times.

[0038] The floating constraint block 2 needs to continuously apply constraint force to the outer surface of the tube. If the contact surface shape between the block and the outer wall of the stainless steel tube 01 is not matched, or the contact end is a rigid planar structure, it is easy to form local point contact or line contact, which will cause the contact stress to concentrate. This will not only affect the uniform transmission of constraint force, but may also cause indentation, wear and other adverse effects on the outer surface of the stainless steel tube 01.

[0039] like Figures 1 to 4 As shown, each floating constraint block 2 has an arc-shaped pressing surface 21 on the side facing the stainless steel tube 01, which is adapted to the outer wall of the stainless steel tube 01. A high-temperature resistant elastic buffer layer is provided on the arc-shaped pressing surface 21. During the pressing process, the floating constraint block 2 can form a larger contact area with the outer wall of the stainless steel tube 01, thereby improving the uniformity of constraint force transmission and avoiding excessive local stress concentration caused by traditional flat blocks or localized hard pressing. The high-temperature resistant elastic buffer layer ensures that the floating constraint block 2 maintains good contact stability and flexible compensation capability even under high welding temperatures, adaptively buffering local dimensional deviations, minor surface undulations, and thermal deformation during the pressing process. This invention not only improves the contact effect between the floating constraint block 2 and the outer wall of the stainless steel tube 01, enhancing the stability and uniformity of the constraint effect, but also reduces the risk of surface damage under local contact stress and high temperatures, thus improving the deformation control accuracy during welding and reducing external surface damage and secondary stress concentration problems.

[0040] To ensure greater structural stability during the welding process of stainless steel pipe 01, in some embodiments of the present invention, such as... Figure 1 , Figure 2 As shown, it also includes an annular support frame 1 set on the outer circumference of the stainless steel pipe 01. Each hydraulic cylinder 3 is fixedly connected to the annular support frame 1 at circumferential intervals. Each floating constraint pressure block 2 is respectively set at the output end of the corresponding hydraulic cylinder 3. A unified installation benchmark and regular circumferential distribution base are formed on the outer circumference of the stainless steel pipe 01, so that multiple hydraulic cylinders 3 and floating constraint pressure blocks 2 can form a stable multi-point pressure system around the stainless steel pipe 01. It should be noted that the annular support frame 1 can take many forms. It can be an integral ring, directly fitted onto the position to be welded, and then moved out from the other end of the stainless steel pipe 01; or it can be a segmented splicing type, which is more convenient for installation and disassembly when encountering a long and large diameter stainless steel pipe 01; or it can be an opening and closing type, which can be opened and closed by hinges or locking parts, making it easy to clamp to the outside of the steel pipe from the side.

[0041] In some embodiments of the present invention, the annular support frame 1 has a segmented structure, with multiple segmented support members connected sequentially along the circumference of the stainless steel tube 01 to form the annular support frame 1. This allows the annular support frame 1 to be arranged separately on the outer circumference of the stainless steel tube 01 before being joined together circumferentially, improving the flexibility of device installation and disassembly.

[0042] Different diameter steel pipes have different outer wall curvatures. If the floating constraint block 2 and the output end of the hydraulic cylinder 3 are rigidly fixed, and the block body structure cannot be replaced, then during actual pressure application, insufficient pressure block posture compensation or mismatch between the pressure surface curvature and the outer wall of the steel pipe can easily lead to insufficient local contact, uneven force, or even edge pressing. Figure 2 , Figure 3 As shown, each floating constraint pressure block 2 is connected to the output end of the corresponding hydraulic cylinder 3 via a ball joint 31. Each floating constraint pressure block 2 is a detachable and replaceable structure. The curvature of the arc-shaped pressing surface 21 of different floating constraint pressure blocks 2 is adapted to the outer wall of stainless steel pipes 01 of different diameters. Through the ball joint 31 connection, the floating constraint pressure block 2 can still generate a certain angle of attitude compensation relative to the hydraulic cylinder 3 while applying radial pressure under the drive of the hydraulic cylinder 3, thereby improving the adaptive fitting ability of the pressure block to the outer wall of the stainless steel pipe 01. By setting each floating constraint pressure block 2 as a detachable and replaceable structure, and adapting the curvature of the arc-shaped pressing surface 21 of different floating constraint pressure blocks 2 to the outer wall of stainless steel pipes 01 of different diameters, the same control system can quickly adapt to steel pipes of different specifications by replacing the pressure blocks.

[0043] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe welding deformation self-adaptive regulation system based on intelligent monitoring, characterized in that, It includes multiple floating constraint blocks, each of which is evenly distributed along the circumference of the stainless steel tube; The floating constraint blocks apply pressure to the outer surface of the stainless steel in the radial direction. The pressure of each floating constraint block is adjusted independently, and the independent adjustment is based on the deformation results of the stainless steel tube monitored in real time. The adjustment rate of each floating constraint block is consistent, and the adjustment rate is proportional to the variance of the deformation result at each location.

2. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 1, characterized in that, The pressure source for the floating constraint blocks is a hydraulic cylinder, and the hydraulic cylinders corresponding to each floating constraint block use the same hydraulic station.

3. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 1 or 2, characterized in that, The initial pressure of the floating constraint block is output through a deep learning model, which includes: Input layer: Input the three-dimensional data of the stainless steel pipe; In the hidden layer, the geometric feature matrix of the three-dimensional data is extracted, the yield strength parameter is expanded into a material feature matrix with the same dimension as the geometric features, and the geometric feature matrix and the material feature matrix are superimposed element by element to obtain a fused feature matrix. The first output layer outputs the recommended value for the initial pressure; The training objective of the deep learning model is to minimize the mean square error between the predicted initial pressure and the actual optimal pressure.

4. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 3, characterized in that, The deep learning model also includes a second output layer; The second output layer outputs a rate limit value. When the adjustment rate is greater than the rate limit value, the adjustment rate is replaced with the rate limit value.

5. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 1, characterized in that, The pressure adjustment direction of each floating constraint block is determined according to the deformation direction of its corresponding position; when the deformation at the corresponding position is towards the floating constraint block, the pressure of the corresponding floating constraint block is increased; when the deformation at the corresponding position is away from the floating constraint block, the pressure of the corresponding floating constraint block is decreased; when the deformation at the corresponding position is zero, the original pressure of the corresponding floating constraint block is maintained unchanged.

6. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 5, characterized in that, For each set of multi-point data corresponding to a set of deformation results received, each floating constraint block synchronously adjusts its pressure according to the deformation direction at the corresponding position.

7. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 1, characterized in that, Each of the floating constraint blocks has an arc-shaped pressing surface on the side facing the stainless steel tube that is adapted to the outer wall of the stainless steel tube, and a high-temperature resistant elastic buffer layer is provided on the arc-shaped pressing surface.

8. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 2, characterized in that, It also includes an annular support frame disposed on the outer periphery of the stainless steel pipe, and each of the hydraulic cylinders is fixedly connected to the annular support frame at circumferential intervals along the annular support frame, and each of the floating constraint pressure blocks is disposed at the output end of the corresponding hydraulic cylinder.

9. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 8, characterized in that, The annular support frame is a segmented structure, with multiple segmented support components connected sequentially along the circumference of the stainless steel tube to form the annular support frame.

10. The adaptive control system for welding deformation of stainless steel pipes based on intelligent monitoring according to claim 2, characterized in that, Each of the floating constraint blocks is connected to the output end of the corresponding hydraulic cylinder via a ball joint. Each of the floating constraint blocks is a detachable and replaceable structure. The curvature of the arc-shaped pressing surface of different floating constraint blocks is adapted to the outer wall of stainless steel pipes of different diameters.

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