Welding deformation control device and control method for box-shaped structure

Abstract

The welding deformation control device for a box-type structure includes a support part and an adjustment part, the support part is formed with a support surface for supporting a box body to be welded, the adjustment part is connected to the support part and abuts at least the welding surface of the box body to be welded, and during the welding process, the adjustment part adjusts the magnitude and / or the biasing position of the biasing force on the welding surface of the box body to be welded, thereby realizing control of the flatness of the box body to be welded. The control device provides a multi-point flexible support on the box-type structure of the bolster, thereby performing fine control such as real-time dynamic adjustment and stepwise precision adjustment of the manufacturing accuracy and stress distribution during welding of the structure, thereby improving the manufacturing accuracy of the bolster and eliminating post-welding tuning of the box-type structure of the bolster. The present application further discloses a welding deformation control method for a box-type structure.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with an application number of 202111243217.1 and a title of "Welding Deformation Control Device and Control Method for Box-Type Structure", which was filed on October 25, 2021, and the entire content thereof is incorporated into this disclosure by reference.

[0002] This application relates to the technical field of welding, and in particular, to a welding deformation control device and control method for a box-type structure.

Background Art

[0003] The bolster of a high-speed train is a box-type welded structure composed of aluminum alloy profiles and plates. It is an important load-bearing part and a main component in the long, large, and thin-walled car body of a high-speed train, and is connected to the bogie of the high-speed train. The box-type bolster structure requires high manufacturing accuracy, has a harsh use environment and operating mode, and receives repeated impact loads when the train runs at high speed. The box-type bolster structure is an asymmetric welded structure with internal reinforcing ribs. The welding structure is complex, the welding space is narrow, mainly welding of medium-thick plates with a thickness of 8 mm or more is carried out, there are many weld beads, the welding amount is large, and in addition, the aluminum alloy has a large expansion coefficient when heated to a high temperature, so serious welding deformation occurs. In order to meet the subsequent assembly requirements of the car body, it is necessary to add flame correction and tuning after welding, which reduces the production efficiency and causes loss of strength and performance degradation. The further improvement of the manufacturing quality and automation efficiency of the aluminum alloy car body of high-speed trains is severely restricted.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application provides a welding deformation control device and control method for a box-shaped structure. In the prior art, it is impossible to eliminate the tuning after welding of the bolster structure, effectively suppress welding deformation, the workload of repeated verification is large, precise and dynamic adjustment cannot be performed based on the evolution trend and change amount of the deformation of the welded structure, and the reverse deformation effect is not good. To solve these defects, a multi-point flexible support is provided for the box-shaped structure of the bolster. During the welding process, the positioning support, the position of the rigidity constraint point and the magnitude of the acting force, the reverse deformation position and the reverse deformation amount at each step of the box-shaped structure of the bolster are quantitatively output in real time, and the manufacturing accuracy and stress distribution during the welding of the box-shaped structure of the bolster are monitored dynamically and in real time in three dimensions, so as to perform refined control such as real-time dynamic adjustment and step-by-step precise adjustment, improve the manufacturing accuracy of the bolster, eliminate the tuning after welding of the box-shaped structure of the bolster, reduce the manufacturing cost, and greatly improve the production efficiency.

Means for Solving the Problems

[0005] This application further provides a refined control method for welding deformation of a box-shaped structure. In the prior art, it is impossible to eliminate the tuning after welding of the bolster structure, effectively suppress welding deformation, the workload of repeated verification is large, precise and dynamic adjustment cannot be performed based on the evolution trend and change amount of the deformation of the welded structure, and the reverse deformation effect is not good. To solve these defects, a mathematical model formula for the box-shaped structure of the bolster is constructed to realize multi-point flexible support, dynamic digital crimping and stepless position adjustment for the box-shaped structure of the bolster, monitor the manufacturing accuracy and stress distribution during the welding of the box-shaped structure of the bolster dynamically and in real time in three dimensions, perform refined control such as real-time dynamic adjustment and step-by-step precise adjustment, quantitatively output the positioning support, the position of the rigidity constraint point and the magnitude of the acting force, the reverse deformation position and the reverse deformation amount at each step of the box-shaped structure of the bolster in real time, improve the manufacturing accuracy of the bolster, eliminate the tuning after welding of the box-shaped structure of the bolster, reduce the manufacturing cost, and greatly improve the production efficiency.

[0006] The welding deformation control device for a box-shaped structure according to the first aspect of the present application includes a support part and an adjustment part. A support surface for supporting a box body to be welded is formed on the support part. The adjustment part is connected to the support part and abuts at least on the welding surface of the box body to be welded. In the welding process, the adjustment part realizes control over the flatness of the box body to be welded by adjusting the magnitude and / or the biasing position of the biasing force on the welding surface of the box body to be welded.

[0007] According to one embodiment of the present application, the box body to be welded includes at least a first welding surface and a second welding surface. The first welding surface is the surface on the side of the box body to be welded close to the support surface, and the second welding surface is the surface on the side of the box body to be welded far from the first welding surface.

[0008] Specifically, this embodiment provides an embodiment of the box body to be welded.

[0009] According to one embodiment of the present application, the thickness of at least a part of the region on the first welding surface of the box body to be welded is smaller than the thickness of a part of the second welding surface.

[0010] Specifically, this embodiment provides an embodiment of the first welding surface and the second welding surface.

[0011] According to one embodiment of the present application, the support part includes a support base and a drive unit. The surface of the support base forms the support surface. The drive unit is connected to the support base and is used to adjust the rotation angle of the support base to realize the welding of the first welding surface and the second welding surface. Here, a plurality of gaps are provided in the support base, and the gaps correspond to at least the positions to be welded on the first welding surface.

[0012] Specifically, this embodiment provides an embodiment of the support part.

[0013] According to one embodiment of the present application, the adjusting part includes a first adjusting seat, a first adjusting cylinder, and a first sensor component. A plurality of the first adjusting seats are connected to the support base. One end of the first adjusting cylinder is provided on the first adjusting seat. The other end of the first adjusting cylinder abuts against the first welding surface. The first sensor component is connected to at least the first adjusting cylinder. Here, in the welding process, the first adjusting cylinder adjusts the stroke of the first adjusting cylinder based on the parameters fed back by the first sensor component, so as to realize the adjustment of the magnitude of the biasing force on the first welding surface.

[0014] Specifically, this embodiment provides an embodiment in which the adjusting part is provided on the support base.

[0015] According to one embodiment of the present application, the adjusting part includes a second adjusting seat, a second adjusting cylinder, a pressing rod, and a second sensor component. A plurality of the second adjusting seats are provided on the side of the support base. One end of the second adjusting cylinder is connected to the second adjusting seat. The other end of the second adjusting cylinder is connected to the pressing rod, and the second adjusting cylinder is provided along the vertical direction. The other end of the pressing rod facing the second adjusting cylinder abuts against the second welding surface. The second sensor component is connected to at least the pressing rod. Here, in the welding process, the second adjusting cylinder adjusts the stroke of the second adjusting cylinder based on the parameters fed back by the second sensor component, so as to realize the adjustment of the magnitude of the biasing force of the pressing rod on the second welding surface.

[0016] Specifically, this embodiment provides an embodiment in which the adjusting part is provided on the side of the support base.

[0017] According to one embodiment of the present application, the adjusting portion further includes a slideway, a plurality of the slideways are provided on the side portion of the support base, the second adjusting seat is slidably fitted in the slideway, and here, in the welding process, the second adjusting seat slides along the extending direction of the slideway based on the parameters feedback by the second sensor component, so as to realize the adjustment of the biasing position of the pressing rod on the second welding surface.

[0018] Specifically, this embodiment provides an embodiment in which a slideway is provided on the side portion of the support base.

[0019] According to one embodiment of the present application, the second adjusting seat includes a first panel, a second panel, and a slide block, the first panel is connected to the side portion of the support base, the second panel is connected to the first panel to form an L-shaped structure, the slide block is slidably provided on the second panel, the second adjusting cylinder is connected to the slide block, the adjusting portion further includes a third adjusting cylinder and a tie rod, the third adjusting cylinder is provided on the other surface of the first panel facing the side portion of the support base, one end of the tie rod is connected to the third adjusting cylinder, and the other end of the tie rod passes through an opening groove formed in the second panel and is connected to the slide block.

[0020] Specifically, this embodiment provides an embodiment for adjusting the biasing position of the pressing rod on the second welding surface.

[0021] According to one embodiment of the present application, the pressing rod has a rod-shaped structure whose telescopic length can be adjusted. In the welding process, the pressing rod adjusts its telescopic length based on the parameters feedback by the second sensor component, so as to realize the adjustment of the biasing position on the second welding surface.

[0022] Specifically, this embodiment provides an embodiment of the pressing rod.

[0023] According to one embodiment of the present application, the box body to be welded is a bolster, and the bolster includes at least a through pipe, a first cover plate, and a second cover plate. The two through pipes are provided at intervals. The first cover plate is respectively connected to the two through pipes within the first welding surface, and the second cover plate is respectively connected to the two through pipes within the second welding surface. Here, at least the thickness of the first cover plate is smaller than the thickness of the second cover plate.

[0024] Specifically, this embodiment provides an embodiment in which the box body to be welded is a bolster.

[0025] The control method based on the above welding deformation control device of the box-shaped structure according to the second aspect of the present application is as follows. Obtaining a strain amount parameter in the welding process of the box body to be welded. Generating an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter. Performing real-time inverse deformation adjustment on the box body to be welded in the welding process according to the inverse deformation adjustment strategy.

[0026] According to one embodiment of the present application, the step of obtaining the strain amount parameter in the welding process of the box body to be welded described above specifically includes: Obtaining a first strain characteristic value and a second strain characteristic value in the welding process of the box body to be welded. Here, the first strain characteristic value is a strain region parameter of the box body to be welded, and the second strain characteristic value is a strain force parameter corresponding to the first strain characteristic value. Generating the strain amount parameter based on the first strain characteristic value and the second strain characteristic value.

[0027] Specifically, this embodiment provides an embodiment of obtaining the strain amount parameter in the welding process of the box body to be welded.

[0028] According to one embodiment of the present application, the step of generating an inverse deformation adjustment strategy for controlling the amount of distortion of the welding surface of the box body to be welded based on the above-described distortion amount parameter is specifically as follows: Obtain a plurality of preset adjustment regions based on the welding surface of the box body to be welded, and obtain all adjustment parts within the corresponding preset adjustment region based on the first distortion characteristic value; Generate an adjustment displacement characteristic value based on each of the obtained adjustment parts based on the second distortion characteristic value, where the adjustment displacement characteristic value includes at least a first direction displacement parameter perpendicular to the welding surface of the box body to be welded of the adjustment part, and a second direction displacement parameter parallel to the welding surface of the box body to be welded of the adjustment part; Generate the inverse deformation adjustment strategy based on the preset adjustment region based on all the adjustment displacement characteristic values.

[0029] Specifically, this embodiment provides an embodiment of generating an inverse deformation adjustment strategy for controlling the flatness of the box body to be welded based on the distortion amount parameter.

[0030] According to one embodiment of the present application, the step of generating an inverse deformation adjustment strategy for controlling the amount of distortion of the welding surface of the box body to be welded based on the above-described distortion amount parameter is specifically as follows: Obtain the instantaneous welding region of the box body to be welded, perform dynamic fitting on the instantaneous welding region and the preset adjustment region to obtain an instantaneous adjustment region based on the dynamic fitting; Determine the adjustment parts that are in an active state and outside the instantaneous adjustment region among the instantaneous adjustment regions, and send a sleep signal to the corresponding adjustment parts; Further include determining the adjustment parts that are in a sleep state and within the instantaneous adjustment region among the instantaneous adjustment regions, and sending a wake-up signal to the corresponding adjustment parts.

[0031] Specifically, this embodiment provides another embodiment that generates an inverse deformation adjustment strategy for controlling the flatness of the box body to be welded based on the strain amount parameter.

[0032] According to one embodiment of the present application, the step of generating an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter described above specifically includes: constructing a digital twin model based on the box body to be welded; obtaining a twin strain amount parameter corresponding to the strain amount parameter of the box body to be welded in the digital twin model; and further generating the inverse deformation adjustment strategy based on the twin strain amount parameter.

[0033] Specifically, this embodiment provides an embodiment of constructing an inverse deformation adjustment strategy based on a digital twin model.

[0034] According to one embodiment of the present application, before the step of obtaining the strain amount parameter in the welding process of the box body to be welded, specifically: constructing a finite element model based on the box body to be welded and loading the welding parameters of the box body to be welded in the finite element model; obtaining a first finite element eigenvalue and a second finite element eigenvalue based on the welding parameters in the finite element analysis process of the finite element model, where the first finite element eigenvalue is the inherent strain parameter of the box body to be welded, and the second finite element eigenvalue is the elastic strain parameter of the box body to be welded; further generating finite element analysis parameters based on the first finite element eigenvalue and the second finite element eigenvalue, and generating the inverse deformation adjustment strategy based on the finite element analysis parameters and the strain amount parameter.

[0035] Specifically, this embodiment provides an embodiment of constructing an inverse deformation adjustment strategy based on a finite element model.

[0036] According to one embodiment of the present application, the step of performing real-time reverse deformation adjustment on the box body to be welded in the welding process according to the above-mentioned reverse deformation adjustment strategy is specifically as follows: Obtaining a first reverse deformation adjustment determination and a second reverse deformation adjustment determination in the reverse deformation adjustment strategy, where the first reverse deformation adjustment determination includes a first welding surface of the box body to be welded, and the second reverse deformation adjustment determination includes a second welding surface of the box body to be welded; Controlling in real time the magnitude of the biasing force applied to the first welding surface of the adjusting part according to the first reverse deformation adjustment determination; Controlling in real time the magnitude and / or biasing position of the biasing force applied to the second welding surface of the adjusting part according to the second reverse deformation adjustment determination.

[0037] Specifically, this embodiment provides an embodiment of performing real-time reverse deformation adjustment on the box body to be welded in the welding process according to the reverse deformation adjustment strategy.

Advantages of the Invention

[0038] One or more of the above technical means in the present application have at least one of the following technical effects. The welding deformation control device and control method for the box-shaped structure according to the present application provide multi-point flexible support for the box-shaped structure of the bolster, so that in the welding process, the positioning support, the position and magnitude of the rigid constraint points, the reverse deformation position and the reverse deformation amount at each step of the box-shaped structure of the bolster can be quantitatively output in real time, realizing the three-dimensional dynamic and real-time monitoring of the manufacturing accuracy and stress distribution during the welding of the box-shaped structure of the bolster, performing refined control such as real-time dynamic adjustment and step-by-step precise adjustment, improving the manufacturing accuracy of the bolster, eliminating the post-welding tuning of the box-shaped structure of the bolster, reducing the manufacturing cost, and significantly improving the production efficiency.

[0039] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood by the implementation of the present invention.

Brief Description of the Drawings

[0040] In the following, in order to more clearly explain the technical solution in the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art will be briefly described. Of course, the drawings described below are only a part of the embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

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Embodiments for Carrying out the Invention

[0041] In order to more clearly illustrate the objectives, technical solutions, and advantages of the embodiments of the present application, the following will clearly and completely describe the technical solutions in the present application with reference to the drawings in the present application. Of course, the described embodiments are only a part of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the protection scope of the present application.

[0042] In the description of the embodiments of the present application, the orientation or positional relationship indicated by terms such as "center", "vertical direction", "horizontal direction", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description of the embodiments of the present application, and does not indicate or imply that the indicated device or element has a specific orientation or is configured or operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of the present application. Also, terms such as "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or suggesting relative importance.

[0043] FIGS. 1 to 3 are schematic diagrams 1 to 3 of the mounting relationship of the refined control device for box-shaped structure welding deformation according to the present application. Here, FIG. 2 omits a part of the structure on the side of the support base 30 for the purpose of easily observing the relative position of the slideway 54 and the second adjustment seat 50 and the specific installation inside the support base 30 of the first adjustment seat 40.

[0044] FIGS. 4 and 5 are schematic diagrams 1 and 2 of the mounting relationship of the bolster 60 in the refined control device for box-shaped structure welding deformation according to the present application. It mainly shows the structure of the bolster 60.

[0045] FIG. 6 is a schematic diagram of the structural relationship of the support base 30 in the refined control device for box-shaped structure welding deformation according to the present application. FIG. 6 shows the specific structure of the support base 30.

[0046] FIG. 7 is a schematic diagram of the mounting relationship of the first adjustment seat 40 and the first adjustment cylinder 41 in the refined control device for box-shaped structure welding deformation according to the present application. FIG. 7 shows the specific installation of the first adjustment seat 40.

[0047] FIG. 8 is a schematic diagram of the mounting relationship of the second adjustment seat 50, the second adjustment cylinder 51, and the pressing rod 52 in the refined control device for box-shaped structure welding deformation according to the present application. Here, FIG. 8 also shows a method of providing the support rod 80 on the slide block 503. The pressing rod 52 rotates about the connection part with the support rod 80 as the rotation center. Further, the support rod 80 may be set as a telescopic rod having a telescopic function.

[0048] FIG. 9 is a schematic diagram of the mounting relationship of the second adjustment seat 50, the second adjustment cylinder 51, the pressing rod 52, the tie rod 56, and the third adjustment cylinder 55 in the refined control device for box-shaped structure welding deformation according to the present application, showing the specific structure of the second adjustment seat 50. FIG. 9 mainly shows an embodiment in which the third adjustment cylinder 55 is provided inside the second adjustment seat 50. By providing the third adjustment cylinder 55, the pressing rod 52 can adjust the corresponding biasing position, and the third adjustment cylinder 55 reciprocates the slide block 503.

[0049] FIG. 10 is a schematic diagram of the arrangement relationship of the first sensor component 42, the second sensor component 53, and the controller 90 in the refined control device for box-shaped structure welding deformation according to the present application. FIG. 10 mainly shows the relative arrangement situation among the first sensor component 42, the second sensor component 53, and the controller 90.

[0050] FIG. 11 is a flowchart part 1 of the refined control method for box-shaped structure welding deformation according to the present application. FIG. 11 includes steps S100, S200, and S300, and specifically, it is as follows.

[0051] In step S100, the strain amount parameter in the welding process of the box body to be welded is obtained.

[0052] Specifically, the relevant parameters in the welding process of the box body to be welded are obtained in real time, the relevant parameters are converted into strain amount parameters, and flexible dynamic control in real time in the welding process of the box body to be welded is realized.

[0053] In a possible embodiment, all the box bodies to be welded mentioned in this application are the bolster 60.

[0054] In a possible embodiment, the box bodies to be welded mentioned in this application may be understood as other box-shaped structures having a structure similar to that of the bolster, and at least two opposite surfaces need to be welded.

[0055] In step S200, based on the strain amount parameter, an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded is generated.

[0056] Specifically, the inverse deformation adjustment strategy is a strategy that is updated in real time, corresponding to the welding process of the box body to be welded. As the welding process of the box body to be welded progresses, the inverse deformation adjustment strategy is updated in real time.

[0057] In step S300, according to the inverse deformation adjustment strategy, real-time inverse deformation adjustment is performed on the box body to be welded in the welding process.

[0058] In a possible embodiment, even after adjusting the box body to be welded according to the inverse deformation adjustment strategy, the data of the adjusted part is collected in real time to facilitate the positioning of the adjusted part with respect to the box body to be welded and the control of subsequent deformation problems associated with the temperature drop.

[0059] In a possible embodiment, throughout the entire welding process of the box body to be welded, all adjusting parts are involved. As the welding position is adjusted, the adjusting parts within the welding range adjust the biasing force and / or the biasing position based on the concentration of heat and stress.

[0060] FIG. 12 is a second flowchart of the refined control method for box-shaped structure welding deformation according to this application. FIG. 12 includes steps S110 and S120, and specifically, it is as follows.

[0061] In step S110, obtain a first strain characteristic value and a second strain characteristic value in the welding process of the box body to be welded. Here, the first strain characteristic value is the strain region parameter of the box body to be welded, and the second strain characteristic value is the strain force parameter corresponding to the first strain characteristic value.

[0062] Specifically, in the welding process, the welding positions of the first welding surface 10 and the second welding surface 20 have the characteristics that heat and stress are more concentrated compared with the surrounding area. Therefore, by obtaining both the strain region parameter and the strain force parameter, control can be performed by the corresponding adjusting part based on the specific strain force parameter of the strain region parameter. For example, the strain region parameter includes three adjusting parts, and the strain force parameters corresponding to each of them are different. Therefore, the biasing forces applied by each adjusting part are also different. Moreover, as the welding progresses, the biasing positions of each adjusting part also change according to the specific deformation states of the first welding surface 10 and the second welding surface 20.

[0063] In step S120, generate a strain amount parameter based on the first strain characteristic value and the second strain characteristic value.

[0064] Specifically, by forming a strain amount parameter based on the first strain characteristic value and the second strain characteristic value, the monitoring of the heat quantity change region and the stress concentration region in the welding process of the bolster 60 becomes more accurate, and the flexible dynamic control of the adjusting part on the welding surface of the bolster 60 also becomes more accurate.

[0065] FIG. 13 is a flowchart part 3 of the refined control method for box - type structure welding deformation according to the present application. FIG. 13 includes steps S210, S220, and S230. Specifically, it is as follows.

[0066] In step S210, obtain a plurality of preset adjustment regions based on the welding surface of the box body to be welded, and obtain all the adjusting parts within the corresponding preset adjustment region based on the first strain characteristic value.

[0067] Specifically, based on the distribution of the adjusting parts, the adjusting parts can be set into a plurality of preset adjusting areas, and the adjusting parts within each preset adjusting area can operate independently, and under the control of the controller 90, the magnitude and / or the biasing position of the corresponding biasing force are adjusted.

[0068] In step S220, based on the second strain eigenvalue, an adjustment displacement eigenvalue based on each obtained adjusting part is generated. Here, the adjustment displacement eigenvalue includes at least a first direction displacement parameter perpendicular to the welding surface of the box body to be welded by the adjusting part, and a second direction displacement parameter parallel to the welding surface of the box body to be welded by the adjusting part.

[0069] Specifically, the adjusting part generates an adjustment displacement eigenvalue based on the magnitude of the stress at the corresponding biasing position. Within one preset adjusting area, each adjusting part determines the first direction displacement parameter and the second direction displacement parameter based on the specific situation of the bolster 60 in this area.

[0070] In step S230, based on all the adjustment displacement eigenvalues, an inverse deformation adjustment strategy based on the preset adjustment area is generated.

[0071] Specifically, based on all the adjustment displacement eigenvalues generated by each adjusting part in one preset adjusting area, an inverse deformation adjustment strategy for controlling the strain of the bolster 60 within the preset adjusting area is generated.

[0072] FIG. 14 is a fourth flowchart of the method for refined control of box structure welding deformation according to the present application. FIG. 14 includes steps S231, S232 and S233, specifically as follows.

[0073] In step S221, the instantaneous welding area of the box body to be welded is obtained, and dynamic fitting is performed on the instantaneous welding area and the preset adjusting area to obtain an instantaneous adjusting area based on the dynamic fitting.

[0074] Specifically, the welding process of the bolster 60 is changing. That is, as the welding torch moves, the deformation area of the bolster 60 also changes. Therefore, it is necessary to obtain the corresponding instantaneous welding area.

[0075] Furthermore, fitting is performed based on the instantaneous welding area and the preset adjustment area to obtain the instantaneous adjustment area.

[0076] Note that the instantaneous adjustment area is dynamically changing and corresponding changes are made according to the welding process of the bolster 60.

[0077] In step S232, among the instantaneous adjustment areas, determine the adjustment parts that are in the active state and outside the instantaneous adjustment area, and send a sleep signal to the corresponding adjustment parts.

[0078] In step S233, among the instantaneous adjustment areas, determine the adjustment parts that are in the sleep state and inside the instantaneous adjustment area, and send a wake-up signal to the corresponding adjustment parts.

[0079] Specifically, in the above steps S232 and S233, during the welding process of the bolster 60, since the welding position is fixed, usually, a single welding mechanism is adopted. In some cases, multiple welding mechanisms are adopted for joint work. However, whether it is single welding or joint welding, the distortion positions on the bolster 60 are all dynamic. Therefore, it is necessary to form an instantaneous adjustment area. By waking up the corresponding adjustment parts based on the instantaneous adjustment area, corresponding control can be performed by the adjustment parts in the area where heat and stress are concentrated.

[0080] Also, the adjustment parts that have not been woken up or have entered the sleep state from the active state continue to support the bolster 60 based on the predicted support force and form the positioning of the bolster 60.

[0081] Note that the active state mentioned in this application corresponds to the state in which the adjustment unit performs flexible dynamic adjustment based on the corresponding distortion of the welding surface, while the sleep state corresponds to the state in which the deformation of the welding surface is relatively small or already stable, and the adjustment unit only plays a supporting role.

[0082] Figure 15 is the fifth flowchart of the refined control method for box-shaped structure welding deformation according to this application. Figure 15 includes steps S240, S250, and S260, specifically as follows.

[0083] In step S240, a digital twin model based on the box body to be welded is constructed.

[0084] Specifically, by constructing the digital twin model, the calculation of the reverse deformation amount of the bolster 60 is realized.

[0085] In step S250, the twin strain amount parameter corresponding to the strain amount parameter of the box body to be welded in the digital twin model is obtained.

[0086] Specifically, for the twin strain amount parameter in the digital twin model, in the virtual digital twin model, the crimping points, crimping forces, reverse deformation positions, reverse deformation amounts, and welding process information set in each process of the bolster 60 are output, thereby adjusting the assembly welding process in real time and achieving the purpose of realizing refined control.

[0087] In step S260, a reverse deformation adjustment strategy is generated based on the twin strain amount parameter.

[0088] Specifically, a reverse deformation adjustment strategy is generated based on the twin strain amount parameter to realize real-time flexible dynamic control of the welding process of the bolster 60.

[0089] Furthermore, the corresponding adjustment state can be simulated by the digital twin model to obtain the optimal adjustment strategy for the bolster 60, and then a reverse deformation adjustment strategy can be generated.

[0090] Figure 16 is the sixth flowchart of the refined control method for box - type structure welding deformation according to the present application. Figure 16 includes steps S70, S80, and S90, and specifically, it is as follows.

[0091] In step S70, a finite element model based on the box body to be welded is constructed, and the welding parameters of the box body to be welded are loaded in the finite element model.

[0092] Specifically, in order to obtain simulation results, the specific model number, size, related welding parameters, clamp parameters, etc. of the bolster 60 are pre - simulated by the finite element model. Furthermore, based on the simulation results, settings can be made in aspects such as the corresponding jig and the supporting force of the adjusting part, and adjustment strategies can be preset and compared with the actually collected data to easily improve work efficiency.

[0093] In step S80, a first finite element eigenvalue and a second finite element eigenvalue based on the welding parameters in the finite element analysis process of the finite element model are obtained. Here, the first finite element eigenvalue is the inherent strain parameter of the box body to be welded, and the second finite element eigenvalue is the elastic strain parameter of the box body to be welded.

[0094] Specifically, by obtaining the inherent strain parameter and the elastic strain parameter in the finite element analysis process, the analysis process for the bolster 60 is made closer to the true value.

[0095] Furthermore, in the process of performing finite element analysis, environmental parameters, etc. can be set to simulate the specific processing environment, current, voltage, etc. of the bolster 60, and the obtained simulation results are more accurate.

[0096] In step S90, finite element analysis parameters are generated based on the first finite element eigenvalue and the second finite element eigenvalue, and an inverse deformation adjustment strategy is generated based on the finite element analysis parameters and the strain amount parameters.

[0097] Specifically, an inverse deformation adjustment strategy is generated based on the first finite element eigenvalue and the second finite element eigenvalue.

[0098] FIG. 17 is a flowchart No. 7 of the refined control method for the welded deformation of the box-shaped structure according to the present application. FIG. 17 includes steps S310, S320, and S330, and specifically, it is as follows.

[0099] In step S310, the first inverse deformation adjustment determination and the second inverse deformation adjustment determination in the inverse deformation adjustment strategy are obtained. Here, the first inverse deformation adjustment determination includes the first welding surface 10 of the box body to be welded, and the second inverse deformation adjustment determination includes the second welding surface 20 of the box body to be welded.

[0100] Specifically, by obtaining the specific adjustment determination of the inverse deformation adjustment strategy, the control of the first welding surface 10 and the second welding surface 20 is respectively realized.

[0101] It should be noted that the settings here take into account the differences in the thickness of the first welding surface 10 and the second welding surface 20 and the specific settings of the adjustment part. [[ID=2 + 1]]

[0102] In step S320, the magnitude of the biasing force of the adjustment part to the first welding surface 10 is controlled in real time according to the first inverse deformation adjustment determination.

[0103] Specifically, the flexible dynamic control of the magnitude of the biasing force to the first welding surface 10 is realized by the first inverse deformation adjustment determination.

[0104] In step S330, the magnitude and / or the biasing position of the biasing force of the adjustment part to the second welding surface 20 are controlled in real time according to the second inverse deformation adjustment determination.

[0105] Specifically, the flexible dynamic control of the magnitude and / or the biasing position of the biasing force to the second welding surface 20 is realized by the second inverse deformation adjustment determination.

[0106] In the description of the embodiments of the present application, unless there are specific regulations and limitations, terms such as "connected to each other" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection, and may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific situation.

[0107] In the embodiments of the present application, unless there are specific regulations and limitations, the fact that the first feature is located "above" or "below" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Also, the fact that the first feature is located "above", "above the upper side" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is located "below", "below the lower side" or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is lower than that of the second feature.

[0108] In some specific implementation measures of the present application, as shown in FIGS. 1 to 10, this measure provides a welding deformation control device with a box-shaped structure, including a support part and an adjustment part. A support surface for supporting the box body to be welded is formed on the support part. The adjustment part is connected to the support part and abuts at least against the welding surface of the box body to be welded. During the welding process, the adjustment part realizes the control of the flatness of the box body to be welded by adjusting the magnitude and / or the biasing position of the biasing force on the welding surface of the box body to be welded.

[0109] Specifically, the present application provides a welding deformation control device and control method for a box-shaped structure. In the prior art, it is impossible to eliminate the post-welding tuning of the bolster 60 structure, effectively suppress welding deformation, the amount of repetitive verification work is large, precise and dynamic adjustment cannot be performed based on the evolution trend and change amount of the deformation of the welded structure, and the reverse deformation effect is not good. To solve these defects, a multi-point flexible support is provided for the box-shaped structure of the bolster 60, so that during the welding process, the positioning support, the position of the rigidity constraint point and the magnitude of the acting force, the reverse deformation position and the reverse deformation amount at each step of the box-shaped structure of the bolster 60 are quantitatively output in real time, and the manufacturing accuracy and stress distribution during the welding of the box-shaped structure of the bolster 60 are monitored dynamically and in real time in three dimensions, so as to perform refined control such as real-time dynamic adjustment and step-by-step precise adjustment, improve the manufacturing accuracy of the bolster 60, eliminate the post-welding tuning of the box-shaped structure of the bolster 60, reduce the manufacturing cost, and greatly improve the production efficiency.

[0110] In some possible embodiments of the present application, the box body to be welded includes at least a first welding surface 10 and a second welding surface 20. The first welding surface 10 is the surface on the side close to the support surface of the box body to be welded, and the second welding surface 20 is the surface on the side far from the first welding surface 10 of the box body to be welded.

[0111] Specifically, this embodiment provides an embodiment of the box body to be welded. The first welding surface 10 and the second welding surface 20 are provided on the box body to be welded. By restricting the relative positions of the first welding surface 10 and the second welding surface 20 and the support surface, during the welding process, the first welding surface 10 and the second welding surface 20 of the box body to be welded can be adjusted by the adjusting part respectively, and structural damage or relatively large deformation may occur on the first welding surface 10 and the second welding surface 20 due to the concentration of heat and stress during welding, further causing manufacturing errors can be avoided, the post-welding tuning of the box body to be welded can be eliminated, the manufacturing cost can be reduced, and the production efficiency can be greatly improved.

[0112] Note that a support surface for supporting the box body to be welded is formed on the support portion. The support surface may be a solid support surface formed by the specific structure of the surface of the support portion. The solid support surface means that it is in surface contact with the contact surface of the box body to be welded by the support portion and is completely supported by the surface structure of the support portion. A structure such as a watermark engraving may be adopted on the surface of the support surface to form a physical support surface. The physical support surface may be a plane where the engagement surface between the box body to be welded and the support portion is located. The support portion may partially support the box body to be welded within the plane, and it is not necessary to adopt complete surface contact.

[0113] In a possible embodiment, the first welding surface 10 and the second welding surface 20 refer to two opposite planes of the box body to be welded. In the two opposite planes of the box body to be welded, a lot of welding needs to be performed, but the concentration of heat and stress caused by welding causes the generation of distortion on the first welding surface 10 and the second welding surface 20.

[0114] In a possible embodiment, the first welding surface 10 and the second welding surface 20 refer to some of the welding beads in two opposite planes of the box body to be welded.

[0115] In some possible embodiments of the present application, the thickness of at least a part of the region on the first welding surface 10 of the box body to be welded is smaller than the thickness of a part of the second welding surface 20.

[0116] Specifically, this embodiment provides embodiments of the first welding surface 10 and the second welding surface 20. Since there is a region on the first welding surface 10 of the box body to be welded where the thickness is smaller than the thickness of the second welding surface 20, the overall amount of distortion within the first welding surface 10 of the box body to be welded may be larger than that of the second welding surface 20. Therefore, when the first welding surface 10 is provided on the side closer to the support base 30, due to the overall support action of the support base 30 on the first welding surface 10, in the welding process, it is possible to avoid the generation of a relatively large overall distortion on the first welding surface 10, and the support base 30 exerts an inverse deformation action on the first welding surface 10.

[0117] In a possible embodiment, the box body to be welded is the bolster 60 of a rail vehicle.

[0118] In a possible embodiment, the number of arrangements of the welding layer grooves on the first welding surface 10 is less than that on the second welding surface 20. In actual applications, due to the structural particularity of the bolster 60, both the thickness and the number of welding layer grooves of the first welding surface 10 and the second welding surface 20 of the bolster 60 are different. Generally, both the thickness and the number of welding layer grooves of the second welding surface 20 are more than those of the first welding surface 10. Since the second welding surface 20 has a relatively large thickness, the overall distortion during the welding process is smaller than that of the first welding surface 10. However, since the number of welding layer grooves on the second welding surface 20 is large, that is, the number of welding layers is more, the stress near the weld bead is more concentrated and the deformation is more severe. Therefore, it is necessary to install the second welding surface 20 on the far side from the support base 30. By performing flexible support and dynamic adjustment through the adjustment part, during the welding process, reverse deformation control of the weld bead on the second welding surface 20 is realized, the distortion amount of the bolster 60 is reduced, the flatness of the bolster 60 is improved, and thus the manufacturing accuracy of the bolster 60 is improved.

[0119] In some possible embodiments of the present application, the support part includes a support base 30 and a drive unit 31. The surface of the support base 30 forms a support surface. The drive unit 31 is connected to the support base 30 and is used to adjust the rotation angle of the support base 30 to realize the welding of the first welding surface 10 and the second welding surface 20. Here, a plurality of gaps are provided in the support base 30, and the gaps correspond at least to the positions to be welded on the first welding surface 10.

[0120] Specifically, this embodiment provides an embodiment of the support part. The drive unit 31 realizes the reverse rotation of the support base 30, and further the welding mechanism welds the first welding surface 10 and the second welding surface 20.

[0121] In addition, all the welding operations of the conventional bolster 60 adopted a single welding mechanism, that is, a single welding torch was used for welding. In the process of welding the bolster 60, there were problems such as the need for manual turning over, repeated positioning, and clamping, making it difficult to form a clamp in one go. Therefore, it also affected the processing accuracy of the bolster 60, increased the labor intensity. At the same time, in the conventional method, there was a situation of providing single support for the bolster 60. With a single welding distortion suppression measure, the manufacturing accuracy after welding of the structure of the box-shaped bolster 60 still did not reach the tuning-free standard.

[0122] It should be noted that in the present application, the specific structure of the drive unit 31 is not limited, and it includes a motor, bearings, a support mechanism, a transmission mechanism, etc. Due to space limitations in the paper width, the present application does not describe the specific structure in detail. In actual applications, those skilled in the art can refer to the installations in related fields according to the actual situation.

[0123] In a possible embodiment, in the present application, after the bolster 60 is installed on the support base 30, the first welding surface 10 of the bolster 60 contacts the support base 30, and the second welding surface 20 becomes the opposite surface. Therefore, welding can be directly performed on the second welding surface 20. However, for welding on the first welding surface 10, it is necessary to reverse the support base 30 by the drive unit 31. A plurality of gaps are provided in the support base 30 itself, and the gaps correspond to the welding beads on the first welding surface 10 of the bolster 60. Therefore, the welding mechanism can weld the first welding surface 10 of the bolster 60 through the gaps, and at the same time, the support base 30 itself also exerts a certain reverse deformation effect through surface contact with the first welding surface 10, avoiding the problem that the first welding surface 10 of the bolster 60 generates excessive distortion due to heat and stress concentration during the welding process, and thus the need for tuning the bolster 60 after welding.

[0124] In some possible embodiments of the present application, the adjusting part includes a first adjusting seat 40, a first adjusting cylinder 41 and a first sensor component 42. A plurality of first adjusting seats 40 are connected to the support base 30. One end of the first adjusting cylinder 41 is provided on the first adjusting seat 40, the other end of the first adjusting cylinder 41 abuts against the first welding surface 10, and the first sensor component 42 is connected to at least the first adjusting cylinder 41. Here, in the welding process, the first adjusting cylinder 41 adjusts the stroke of the first adjusting cylinder 41 based on the parameters feedback by the first sensor component 42, so as to realize the adjustment of the magnitude of the biasing force on the first welding surface 10.

[0125] Specifically, the present embodiment provides an embodiment in which the adjusting part is provided on the support base 30. By providing the first adjusting seat 40 and the first adjusting cylinder 41, flexible support from one side of the support base 30 to the first welding surface 10 is realized. And by installing the first sensor component 42, the first adjusting cylinder 41 adjusts the flexible supporting force based on relevant parameters in the welding process, and further realizes dynamic adjustment based on the real-time parameters of the first welding surface 10 at the position where the first adjusting cylinder 41 is located.

[0126] It should be noted that the present application does not limit the specific structure of the first adjusting seat 40, and the first adjusting seat 40 may be provided according to the actual situation.

[0127] In a possible embodiment, the first adjusting seat 40 is provided inside the support base 30, and a passage for the first adjusting cylinder 41 to protrude is provided on the surface of the support base 30.

[0128] In a possible embodiment, the first adjusting seat 40 is provided on the other side of the support base 30 facing the bolster 60, and a passage for the first adjusting cylinder 41 to protrude is provided on the surface of the support base 30.

[0129] In a possible embodiment, the first adjustment cylinder 41 is a pneumatic cylinder, and the present application further includes a corresponding air mechanism connected to the first adjustment cylinder 41, such as an air source, an air pump, and an air line, etc., so that the first adjustment cylinder 41 can adjust the magnitude of the biasing force on the first welding surface 10 by telescopic adjustment.

[0130] In a possible embodiment, the first adjustment cylinder 41 is a hydraulic cylinder, and the present application further includes a corresponding hydraulic mechanism connected to the first adjustment cylinder 41, such as an oil tank, an oil pump, and a pipe, etc., so that the first adjustment cylinder 41 can adjust the magnitude of the biasing force on the first welding surface 10 by telescopic adjustment.

[0131] In a possible embodiment, the first adjustment cylinder 41 is an electric cylinder, and the present application further includes a corresponding electric mechanism connected to the first adjustment cylinder 41, such as a motor, a power source, and a control board, etc., so that the first adjustment cylinder 41 can adjust the magnitude of the biasing force on the first welding surface 10 by telescopic adjustment.

[0132] In a possible embodiment, the first sensor component 42 includes a first displacement sensor. The first displacement sensor is connected to the first adjustment cylinder 41 and is used to detect the stroke of the first adjustment cylinder 41 and feedback the stroke parameter of the first adjustment cylinder 41 to the controller 90. The controller 90 can more accurately control the magnitude of the biasing force between the first adjustment cylinder 41 and the first welding surface 10 according to the stroke data fed back by the first displacement sensor.

[0133] In a possible embodiment, the first sensor component 42 includes a first stress sensor, and the first stress sensor is provided at the tip of the first adjustment cylinder 41, abuts against the first welding surface 10, and measures the biasing force parameter between the first welding surface 10 and the first adjustment cylinder 41, and is used to feedback the biasing force data corresponding to the controller 90. During the welding process, distortion occurs on the first welding surface 10, the magnitude of the biasing force between the first welding surface 10 and the first adjustment cylinder 41 changes, and the controller 90 makes a judgment based on the feedback biasing force parameter and the preset mechanical model, adjusts the stroke of the first adjustment cylinder 41, and further realizes the adjustment of the magnitude of the biasing force on the first welding surface 10.

[0134] In a possible embodiment, the first sensor component 42 includes a first temperature sensor, and the first temperature sensor is provided at the tip of the first adjustment cylinder 41, abuts against the first welding surface 10, and is used to measure the temperature parameter of the first welding surface 10. At the same time, the first temperature sensor feeds back the temperature parameter of the first welding surface 10 to the controller 90, and the controller 90 makes a judgment based on the temperature parameter and the preset temperature model, controls the magnitude of the biasing force applied to the first welding surface 10, and cooperates with the adjacent first adjustment cylinder 41 to work together based on the temperature field fed back by the first temperature sensor to form a flexible support for controlling the manufacturing accuracy of the first welding surface 10.

[0135] In a possible embodiment, the first sensor component 42 includes a first image sensor. The first image sensor is connected to the first adjustment cylinder 41 and may be provided at the tip of the first adjustment cylinder 41 according to actual requirements. The first image sensor is used to collect three-dimensional topography parameters of the first welding surface 10 during the welding process and transmit them to the controller 90. The controller 90 determines the three-dimensional topography change of the first welding surface 10 during the welding process and performs corresponding control on the first adjustment cylinder 41 based on the determination result. Also, an adjacent first adjustment cylinder 41 can form an inverse deformation adjustment area to realize area control of the first welding surface 10 and improve the processing accuracy of the bolster 60.

[0136] In some possible embodiments of the present application, the adjustment part includes a second adjustment seat 50, a second adjustment cylinder 51, a pressing rod 52, and a second sensor component 53. A plurality of second adjustment seats 50 are provided on the side of the support base 30. One end of the second adjustment cylinder 51 is connected to the second adjustment seat 50, the other end of the second adjustment cylinder 51 is connected to the pressing rod 52, and the second adjustment cylinder 51 is provided along the vertical direction. The other end of the pressing rod 52 facing the second adjustment cylinder 51 abuts against the second welding surface 20. The second sensor component 53 is at least connected to the pressing rod 52. Here, during the welding process, the second adjustment cylinder 51 adjusts the stroke of the second adjustment cylinder 51 based on the parameters fed back by the second sensor component 53 to realize the adjustment of the magnitude of the biasing force of the pressing rod 52 on the second welding surface 20.

[0137] Specifically, this embodiment provides an embodiment in which the adjustment part is provided on the side of the support base 30. By providing the second adjustment seat 50, the second adjustment cylinder 51, and the pressing rod 52, control over the second welding surface 20 is realized. The pressing rod 52 adjusts the corresponding biasing position and / or the magnitude of the biasing force under the action of the second adjustment cylinder 51 to achieve flexible support. By providing the second sensor component 53, the pressing rod 52 can adjust the flexible support force based on relevant parameters during the welding process, and thus realize dynamic adjustment based on the real-time parameters of the second welding surface 20 at the position where the pressing rod 52 is located.

[0138] Moreover, the present application does not limit the specific structure of the second adjustment seat 50, and the second adjustment seat 50 can be provided according to the actual situation.

[0139] Note that a structure similar to a lever is adopted between the second adjustment cylinder 51 and the pressing rod 52. When the second adjustment cylinder 51 operates, the pressing rod 52 rotates around the connection point, thereby realizing adjustment of the magnitude of the biasing force on the second welding surface 20.

[0140] In a possible embodiment, the second adjustment seat 50 is provided with a support rod 80 spaced from the second adjustment cylinder 51. The support rod 80 is connected to the pressing rod 52, and the connection part constitutes the center around which the pressing rod 52 rotates. The pressing rod 52 rotates around the connection position with the support rod 80 to realize adjustment of the magnitude of the biasing force on the second welding surface 20.

[0141] In a possible embodiment, the support rod 80 is a telescopic rod structure that can be driven by any one of electric, air, and hydraulic power. The support rod 80, in cooperation with the second adjustment cylinder 51, realizes adjustment of the magnitude of the biasing force on the second welding surface 20.

[0142] In a possible embodiment, the second adjusting seat 50 is provided on the side of the support base 30. By being connected to the second adjusting seat 50, the second adjusting cylinder 51 is located above the support base 30 and applies a biasing force to the second welding surface 20 via the pressing rod 52.

[0143] In a possible embodiment, the second adjusting seat 50 is provided on the other side of the support base 30 facing the sill 60. By means of a corresponding adapter structure, the second adjusting cylinder 51 is located above the support base 30 and applies a biasing force to the second welding surface 20 via the pressing rod 52.

[0144] In a possible embodiment, the second adjusting cylinder 51 is a pneumatic cylinder. The present application further includes corresponding air mechanisms connected to the second adjusting cylinder 51, such as an air source, an air pump, and an air line, etc. The second adjusting cylinder 51 realizes the adjustment of the magnitude of the biasing force on the second welding surface 20 by means of telescopic adjustment.

[0145] In a possible embodiment, the second adjusting cylinder 51 is a hydraulic cylinder. The present application further includes corresponding hydraulic mechanisms connected to the second adjusting cylinder 51, such as an oil tank, an oil pump, and pipes, etc. The second adjusting cylinder 51 realizes the adjustment of the magnitude of the biasing force on the second welding surface 20 by means of telescopic adjustment.

[0146] In a possible embodiment, the second adjusting cylinder 51 is an electric cylinder. The present application further includes corresponding electric mechanisms connected to the second adjusting cylinder 51, such as a motor, a power source, and a control board, etc. The second adjusting cylinder 51 realizes the adjustment of the magnitude of the biasing force on the second welding surface 20 by means of telescopic adjustment.

[0147] In a possible embodiment, the second sensor component 53 includes a second displacement sensor, which is connected to the second adjustment cylinder 51, detects the stroke of the second adjustment cylinder 51, and is used to feedback the stroke parameter of the second adjustment cylinder 51 to the controller 90. The controller 90 can more accurately control the magnitude of the biasing force between the pressing rod 52 and the second welding surface 20 based on the stroke data feedback by the second displacement sensor.

[0148] In a possible embodiment, the second sensor component 53 includes a second stress sensor, which is provided at the tip of the pressing rod 52, abuts against the second welding surface 20, measures the biasing force parameter between the second welding surface 20 and the pressing rod 52, and is used to feedback the corresponding biasing force data to the controller 90. During the welding process, the second welding surface 20 deforms, the magnitude of the biasing force between the second welding surface 20 and the pressing rod 52 changes, and the controller 90 makes a judgment based on the feedback biasing force parameter and the preset mechanical model, adjusts the stroke of the second adjustment cylinder 51, and further realizes the adjustment of the magnitude of the biasing force of the pressing rod 52 against the second welding surface 20.

[0149] In a possible embodiment, the second sensor component 53 includes a second temperature sensor, which is provided at the tip of the pressing rod 52, abuts against the second welding surface 20, and is used to measure the temperature parameter of the second welding surface 20. At the same time, the second temperature sensor feedbacks the temperature parameter of the second welding surface 20 to the controller 90. The controller 90 makes a judgment based on the temperature parameter and the preset temperature model, controls the magnitude of the biasing force applied to the second welding surface 20, cooperates with the adjacent second adjustment cylinder 51, works jointly based on the temperature field feedback by the second temperature sensor, and forms a flexible support for controlling the manufacturing accuracy of the second welding surface 20.

[0150] In a possible embodiment, the second sensor component 53 includes a second image sensor. The second image sensor is connected to the pressing rod 52 and may be provided at the tip of the pressing rod 52 according to actual requirements. The second image sensor is used to collect the three-dimensional topography parameters of the second welding surface 20 during the welding process and transmit them to the controller 90. The controller 90 determines the three-dimensional topography change of the second welding surface 20 during the welding process and performs corresponding control on the second adjusting cylinder 51 based on the determination result. Also, an adjacent second adjusting cylinder 51 can form an inverse deformation adjustment region to realize region control of the second welding surface 20 and improve the processing accuracy of the bolster 60.

[0151] In some possible embodiments of the present application, the adjusting part further includes a slideway 54. A plurality of slideways 54 are provided on the side of the support base 30, and the second adjusting seat 50 is slidably fitted on the slideway 54. Here, during the welding process, the second adjusting seat 50 slides along the extending direction of the slideway 54 based on the parameters fed back by the second sensor component 53 to realize the adjustment of the biasing position of the pressing rod 52 on the second welding surface 20.

[0152] Specifically, this embodiment provides an embodiment in which a slideway 54 is provided on the side of the support base 30. By providing the slideway, the corresponding second adjusting seat 50 can slide along the side of the support base 30. During the welding process, the biasing position of the pressing rod 52 on the second welding surface 20 can be adjusted within a certain range. Thereby, one pressing rod 52 forms an adjustment region for one inverse deformation amount and cooperates with the adjacent pressing rod 52 to perform control, so as to be able to cope with various deformation situations that occur on the second welding surface 20 during the welding process.

[0153] In a possible embodiment, the second adjusting seat 50 and the slideway 54 are an electric control linear motion module and are respectively connected to the controller 90.

[0154] In a possible embodiment, the bottom of the second adjustment seat 50 is provided with a structure such as a slide block that engages with the slideway 54, and the slide block and the slideway 54 are respectively sub-components of a linear motion module.

[0155] In a possible embodiment, between the second adjustment seat 50 and the slideway 54, adjustment by electric control is realized by a transmission method such as magnetic induction, screw, conveyor belt, etc.

[0156] In a possible embodiment, a plurality of fourth adjustment cylinders 70 are further provided on the side of the support base 30. The fourth adjustment cylinder 70 is in contact with the side of the bolster 60 and is used to position the bolster 60, avoiding displacement during the welding process of the bolster 60.

[0157] In a possible embodiment, the fourth adjustment cylinder 70 is connected to the controller 90. Additionally, the fourth adjustment cylinder 70 is further slidably connected to the slideway 54 and can move along the extending direction of the slideway 54, realizing flexible dynamic support for the side of the support base 30.

[0158] In some possible embodiments of the present application, the second adjustment seat 50 includes a first panel 501, a second panel 502, and a slide block 503. The first panel 501 is connected to the side of the support base 30. The second panel 502 is connected to the first panel 501 to form an L-shaped structure. The slide block 503 is slidably provided on the second panel 502. The second adjustment cylinder 51 is connected to the slide block 503. The adjustment part further includes a third adjustment cylinder 55 and a tie rod 56. The third adjustment cylinder 55 is provided on the other surface of the first panel 501 facing the side of the support base 30. One end of the tie rod 56 is connected to the third adjustment cylinder 55, and the other end of the tie rod 56 passes through an opening groove formed in the second panel 502 and is connected to the slide block 503.

[0159] Specifically, the present embodiment provides an embodiment for adjusting the biasing position of the pressing rod 52 at the second welding surface 20. By providing the specific structure of the second adjusting seat 50 and the structures of the third adjusting cylinder 55 and the tie rod 56, the pressing rod 52 can realize the adjustment of the biasing position at the second welding surface 20 under the action of the tie rod 56 and the third adjusting cylinder 55.

[0160] Furthermore, the second adjusting seat 50 is provided with a first panel 501, a second panel 502 and a slide block 503, so as to realize the connection between the third adjusting cylinder 55 and the pressing rod 52, reduce the occupied space as much as possible, and make the overall structure more compact.

[0161] In a possible embodiment, the third adjusting cylinder 55 is any one or a combination of one or more of an air, hydraulic and electric telescopic rod, and a related control mechanism and piping are provided for the third adjusting cylinder 55. In actual application, the specific installation of the third adjusting cylinder 55 can refer to the related installation of the first adjusting cylinder 41 and the second adjusting cylinder 51 in the present application.

[0162] In a possible embodiment, the second sensor component 53 includes a third displacement sensor connected to the third adjusting cylinder 55. The third displacement sensor is used to detect the stroke parameter of the third adjusting cylinder 55 and feedback it to the controller 90. The controller 90 controls the entire system based on the stroke parameter feedback by the third displacement sensor.

[0163] In some possible embodiments of the present application, the pressing rod 52 has a rod-shaped structure with adjustable telescopic length. During the welding process, the pressing rod 52 adjusts its telescopic length based on the parameters feedback by the second sensor component 53, and realizes the adjustment of the biasing position at the second welding surface 20.

[0164] Specifically, this embodiment provides an embodiment of the pressing rod 52. By setting the pressing rod 52 as a telescopic rod with an adjustable length, the telescopic length of the pressing rod 52 is adjusted, so that the adjustment of the pressing rod 52 with respect to the biasing position at the second welding surface 20 is realized.

[0165] In a possible embodiment, the pressing rod 52 is one or a combination of any of an air, hydraulic, and electric telescopic rod, and a related control mechanism and piping are provided for the pressing rod 52. In actual application, the specific installation of the pressing rod 52 can refer to the related installation of the first adjustment cylinder 41 and the second adjustment cylinder 51 in this application.

[0166] In a possible embodiment, the second sensor component 53 includes a fourth displacement sensor connected to the pressing rod 52. The fourth displacement sensor is used to detect the stroke parameter of the pressing rod 52 and feedback it to the controller 90. The controller 90 controls the entire system based on the stroke parameter feedback by the fourth displacement sensor.

[0167] In some possible embodiments of this application, the box body to be welded is the bolster 60. The bolster 60 includes at least a through pipe 61, a first cover plate 62, and a second cover plate 63. The two through pipes 61 are provided at intervals. The first cover plate 62 is respectively connected to the two through pipes 61 within the first welding surface 10, and the second cover plate 63 is respectively connected to the two through pipes 61 within the second welding surface 20. Here, at least the thickness of the first cover plate 62 is smaller than the thickness of the second cover plate 63.

[0168] Specifically, this embodiment provides an embodiment in which the box body to be welded is the bolster 60. The bolster 60 includes structures such as a through pipe 61, a first cover plate 62, and a second cover plate 63. In actual applications, the bolster 60 should also include structures such as corresponding reinforcing ribs and inner lining boards that play a role in reinforcement and connection. In this embodiment, only the through pipe 61, the first cover plate 62, and the second cover plate 63 are provided and shown, but it does not mean that the bolster 60 only includes the above structures.

[0169] In a possible embodiment, the thickness of the first cover plate 62 is smaller than the thickness of the second cover plate 63.

[0170] In a possible embodiment, the thickness of the side of the through pipe 61 corresponding to the first cover plate 62 is smaller than the thickness of the side of the through pipe 61 corresponding to the second cover plate 63.

[0171] In a possible embodiment, during the welding process of the bolster 60, due to the concentration of heat and stress, deformation of the first cover plate 62, the second cover plate 63, and the through pipe 61 exists. This embodiment realizes the real-time quantitative output of reverse deformation force and corresponding biasing positions for the first welding surface 10 and the second welding surface 20 of the bolster 60 by providing an adjustable part that flexibly supports the first welding surface 10 and the second welding surface 20 of the bolster 60 during the welding process. Real-time refined control of the deformation of the bolster 60 during the welding process is realized, improving the manufacturing accuracy of the bolster 60, eliminating the post-welding tuning of the box-shaped structure of the bolster 60, reducing the manufacturing cost, and significantly improving the production efficiency.

[0172] In a possible embodiment, on the first welding surface 10 of the bolster 60, the support points formed by the first adjustment cylinder 41 are spaced apart to form a total of 15 flexible adjustment points in 3 rows and 5 columns.

[0173] In a possible embodiment, on the second welding surface 20 of the bolster 60, the support points formed by the first adjustment cylinder 41 are spaced apart to form a total of 8 flexible adjustment points in 2 rows and 4 columns.

[0174] In some specific embodiments of the present application, as shown in FIGS. 1 to 17, this solution provides a control method based on the above box-shaped structure welding deformation control device, acquiring the strain amount parameter in the welding process of the box body to be welded, generating an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter, and performing real-time inverse deformation adjustment on the box body to be welded in the welding process according to the inverse deformation adjustment strategy.

[0175] Specifically described, the present application further provides a refined control method for the welding deformation of the box-shaped structure. In the prior art, it is impossible to achieve the exemption of tuning after welding of the bolster 60 structure, the welding deformation cannot be effectively suppressed, the workload of repeated verification is large, and precise and dynamic adjustment cannot be performed based on the evolution trend and change amount of the deformation of the welding structure, and the inverse deformation effect is not good. To solve these defects, by constructing a mathematical model formula for the bolster 60 box-shaped structure, multi-point flexible support, dynamic digital crimping and stepless position adjustment for the bolster 60 box-shaped structure are realized, the manufacturing accuracy and stress distribution in the welding process of the bolster 60 box-shaped structure are monitored three-dimensionally, dynamically and in real time, refined control such as real-time dynamic adjustment and step-by-step precise adjustment is performed, the positioning support, the position of the rigidity constraint point and the magnitude of the acting force, the inverse deformation position and the inverse deformation amount at each step of the bolster 60 box-shaped structure are quantitatively output in real time, the manufacturing accuracy of the bolster 60 is improved, the tuning after welding of the bolster 60 box-shaped structure is eliminated, the manufacturing cost is reduced, and the production efficiency is greatly improved.

[0176] In some possible embodiments of the present application, the step of acquiring the strain amount parameter in the welding process of the box body to be welded is specifically To obtain a first strain characteristic value and a second strain characteristic value in the welding process of the box body to be welded, where the first strain characteristic value is a strain region parameter of the box body to be welded, and the second strain characteristic value is a strain force parameter corresponding to the first strain characteristic value. Generating a strain amount parameter based on the first strain characteristic value and the second strain characteristic value.

[0177] Specifically, this embodiment provides an embodiment for obtaining a strain amount parameter in the welding process of the box body to be welded, and realizes the generation of the corresponding strain amount parameter based on the deformation region and deformation force in the welding process of the bolster 60.

[0178] It should be noted that in the welding process, the deformation of the first welding surface 10 and the second welding surface 20 is dynamic. Therefore, the adjusting part needs to perform flexible and dynamic adjustment on both the reverse deformation force applied to the first welding surface 10 and the second welding surface 20 and the corresponding biasing position.

[0179] In some possible embodiments of the present application, the step of generating a reverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter specifically includes: Obtaining a plurality of preset adjustment regions based on the welding surface of the box body to be welded, and obtaining all the adjusting parts within the corresponding preset adjustment regions based on the first strain characteristic value. Generating an adjustment displacement characteristic value based on each obtained adjusting part based on the second strain characteristic value, where the adjustment displacement characteristic value includes at least a first direction displacement parameter perpendicular to the welding surface of the box body to be welded by the adjusting part, and a second direction displacement parameter parallel to the welding surface of the box body to be welded by the adjusting part. Generating a reverse deformation adjustment strategy based on the preset adjustment region based on all the adjustment displacement characteristic values.

[0180] Specifically, this embodiment provides an embodiment that generates an inverse deformation adjustment strategy for controlling the flatness of the box body to be welded based on the strain amount parameter. By obtaining the deformation regions corresponding to the welding positions on the first welding surface 10 and the second welding surface 20 and matching them with the preset adjustment regions, flexible support is realized and the control is made more accurate.

[0181] In addition, in other preset adjustment regions in all preset adjustment regions that do not correspond to the first strain characteristic value of the bolster 60, still perform the corresponding preset support for the bolster 60 to realize the positioning of the bolster 60 during welding.

[0182] Furthermore, the adjustment unit can set the predicted support force based on the specific model number, size, processing parameters, etc. of the bolster 60. That is, when the adjustment unit is not activated or when the bolster 60 is not welded, the adjustment unit realizes the support for the bolster 60 based on the predicted support force.

[0183] In some possible embodiments of the present application, the step of generating an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter specifically includes: Obtain the instantaneous welding region of the box body to be welded, perform dynamic fitting on the instantaneous welding region and the preset adjustment region to obtain an instantaneous adjustment region based on the dynamic fitting, Determine the adjustment units that are in the active state and outside the instantaneous adjustment region among the instantaneous adjustment regions, and send a sleep signal to the corresponding adjustment units, Determine the adjustment units that are in the sleep state and inside the instantaneous adjustment region among the instantaneous adjustment regions, and send a wake-up signal to the corresponding adjustment units.

[0184] Specifically, this embodiment provides another embodiment that generates an inverse deformation adjustment strategy for controlling the flatness of the box body to be welded based on the strain amount parameter. During the welding process of the bolster 60, since the welding position is fixed, usually, a single welding mechanism is adopted, and in some cases, multiple welding mechanisms are adopted for joint work. However, whether it is single welding or joint welding, the strain positions on the bolster 60 are all dynamic, so it is necessary to form an instantaneous adjustment area, and based on the instantaneous adjustment area, the corresponding adjustment part is woken up, and in the area where heat and stress are concentrated, the corresponding control can be performed by the adjustment part.

[0185] Furthermore, the adjustment parts that have not been woken up or have entered the sleep state from the active state continue to support the bolster 60 based on the predicted support force, forming the positioning of the bolster 60.

[0186] It should be noted that the active state mentioned in this application corresponds to the state where the adjustment part performs flexible dynamic adjustment based on the corresponding deformation of the welding surface, while the sleep state corresponds to the state where the deformation of the welding surface is relatively small or has already stabilized, and the adjustment part only plays a supporting role.

[0187] In some possible embodiments of this application, the step of generating an inverse deformation adjustment strategy for controlling the strain amount of the welding surface of the box body to be welded based on the strain amount parameter specifically includes constructing a digital twin model based on the box body to be welded, obtaining the twin strain amount parameter corresponding to the strain amount parameter of the box body to be welded in the digital twin model, and further including generating an inverse deformation adjustment strategy based on the twin strain amount parameter.

[0188] Specifically, this embodiment provides an embodiment of constructing an inverse deformation adjustment strategy based on a digital twin model. By constructing the digital twin model, the calculation of the inverse deformation amount of the bolster 60 is realized, and the crimping points, crimping forces, inverse deformation positions, inverse deformation amounts, and welding process information set in each process of the bolster 60 are output, and the assembly welding process is adjusted in real time to achieve the purpose of realizing refined control.

[0189] In some possible embodiments of the present application, specifically, before the step of obtaining the strain amount parameter in the welding process of the box body to be welded, Construct a finite element model based on the box body to be welded, and load the welding parameters of the box body to be welded in the finite element model; Obtaining a first finite element eigenvalue and a second finite element eigenvalue based on the welding parameters in the finite element analysis process of the finite element model, where the first finite element eigenvalue is the inherent strain parameter of the box body to be welded, and the second finite element eigenvalue is the elastic strain parameter of the box body to be welded; Generating finite element analysis parameters based on the first finite element eigenvalue and the second finite element eigenvalue, and generating an inverse deformation adjustment strategy based on the finite element analysis parameters and the strain amount parameters.

[0190] Specifically, this embodiment provides an embodiment of constructing an inverse deformation adjustment strategy based on a finite element model. By performing a finite element simulation, a simulation calculation is performed on the model of the bolster 60 and the corresponding welding parameters before welding, and the prediction support parameters, prediction deformation parameters, and prediction adjustment parameters of the bolster 60 are obtained. Furthermore, the position of the optimal rigidity constraint point, the inverse deformation application position, the magnitude of the constraint point biasing force, and the inverse deformation amount of the bolster 60 are obtained.

[0191] Note that the inherent strain parameter indicates that strain remains inside the object even after the external load is removed, and when the constraint due to the external load is removed after welding is completed, the elastic strain recovers. Strains other than elastic strain are collectively referred to as inherent strain, and the total deformation after welding is controlled by reducing the welding inherent strain.

[0192] In a possible embodiment, the total strain of the bolster 60 includes elastic strain, plastic strain, thermal strain, creep strain, transformation strain, etc. Applying appropriate elastic reverse deformation measures, that is, increasing the elastic deformation in the opposite direction, contributes to reducing the total strain after welding. However, the elastic reverse deformation should not be excessive, as excessive elastic reverse deformation will cause deformation in the opposite direction after welding.

[0193] In some possible embodiments of the present application, according to the reverse deformation adjustment strategy, the step of performing real-time reverse deformation adjustment on the box body to be welded during the welding process specifically includes: Obtaining a first reverse deformation adjustment decision and a second reverse deformation adjustment decision in the reverse deformation adjustment strategy, where the first reverse deformation adjustment decision includes the first welding surface 10 of the box body to be welded, and the second reverse deformation adjustment decision includes the second welding surface 20 of the box body to be welded; Controlling the magnitude of the biasing force applied to the first welding surface 10 of the adjusting part in real time according to the first reverse deformation adjustment decision; Controlling the magnitude and / or biasing position of the biasing force applied to the second welding surface 20 of the adjusting part in real time according to the second reverse deformation adjustment decision.

[0194] Specifically, this embodiment provides an embodiment of performing real-time reverse deformation adjustment on the box body to be welded during the welding process according to the reverse deformation adjustment strategy. Through flexible and dynamic adjustment of the first welding surface 10 and the second welding surface 20, refined control during the welding process of the bolster 60 is realized, and the manufacturing accuracy of the bolster 60 is improved.

[0195] In the description of this specification, the descriptions referring to terms such as "one embodiment", "several embodiments", "example", "specific example", or "several examples" mean that the specific features, structures, materials, or characteristics described with reference to the said embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in an appropriate form in any one or more embodiments or examples. Moreover, those skilled in the art can combine and combine different embodiments or examples described in this specification with the features of different embodiments or examples without contradiction to each other.

[0196] Finally, it should be noted that the above embodiments are only for explaining this application and do not limit it. Although this application has been described in detail with reference to the embodiments, for those skilled in the art, any combination, modification, or equivalent replacement of the technical solutions of this application does not deviate from the spirit and scope of the technical solutions of this application and should all be included in the scope of the claims of this application.

Description of Reference Signs

[0197] 10: First Welding Surface 20: Second Welding Surface 30: Support Base 31: Driving Unit 40: First Adjusting Seat 41: First Adjusting Cylinder 42: First Sensor Component 50: Second Adjusting Seat 501: First Panel 502: Second Panel 503: Slide Block 51: Second Adjusting Cylinder 52: Pressing Rod 53: Second Sensor Component 54: Slide Way 55: Third Adjusting Cylinder 56: Tie rod 60: Sill beam 61: Through pipe 62: First cover plate 63: Second cover plate 70: Fourth adjustment cylinder 80: Support rod

Claims

1. including a support part and an adjustment part, a support surface for supporting a box body to be welded is formed on the support part, the adjustment part is connected to the support part and abuts at least against the welding surface of the box body to be welded, in the welding process, the adjustment part realizes control over the flatness of the box body to be welded by adjusting the magnitude and / or the biasing position of the biasing force on the welding surface of the box body to be welded, the box body to be welded includes at least a first welding surface and a second welding surface, the first welding surface is the surface on the side of the box body to be welded close to the support surface, the second welding surface is the surface on the side of the box body to be welded far from the first welding surface, the support part includes a support base and a driving unit, the surface of the support base forms the support surface, the driving unit is connected to the support base and is used to adjust the rotation angle of the support base to realize the welding of the first welding surface and the second welding surface, wherein a plurality of gaps are provided in the support base, and the gaps correspond at least to the positions to be welded on the first welding surface, characterized in that a welding deformation control device for a box-shaped structure.

2. characterized in that the thickness of at least a part of the region on the first welding surface of the box body to be welded is smaller than the thickness of a part of the second welding surface the welding deformation control device for a box-shaped structure according to Claim 1.

3. the adjustment part includes a first adjustment seat, a first adjustment cylinder and a first sensor component, a plurality of the first adjustment seats are connected to the support base, one end of the first adjustment cylinder is provided on the first adjustment seat, and the other end of the first adjustment cylinder abuts against the first welding surface, the first sensor component is connected at least to the first adjustment cylinder, wherein in the welding process, the first adjustment cylinder adjusts the stroke of the first adjustment cylinder based on the parameters feedback by the first sensor component to realize the adjustment of the magnitude of the biasing force on the first welding surface, characterized in that the welding deformation control device for a box-shaped structure according to Claim 1.

4. the adjustment part includes a second adjustment seat, a second adjustment cylinder, a pressing rod and a second sensor component, a plurality of the second adjustment seats are provided on the side of the support base, One end of the second adjusting cylinder is connected to the second adjusting seat, the other end of the second adjusting cylinder is connected to the pressing rod, and the second adjusting cylinder is provided along the vertical direction. The other end of the pressing rod facing the second adjusting cylinder abuts against the second welding surface. The second sensor component is connected to at least the pressing rod. Here, in the welding process, the second adjusting cylinder adjusts the stroke of the second adjusting cylinder based on the parameters fed back by the second sensor component, so as to realize the adjustment of the magnitude of the biasing force of the pressing rod on the second welding surface. The welding deformation control device for a box-shaped structure according to claim 1.

5. The adjusting part further includes a slideway, a plurality of the slideways are provided on the side of the support base, and the second adjusting seat is slidably fitted in the slideway. Here, in the welding process, the second adjusting seat slides along the extending direction of the slideway based on the parameters fed back by the second sensor component, so as to realize the adjustment of the biasing position of the pressing rod on the second welding surface. The welding deformation control device for a box-shaped structure according to claim 4.

6. The second adjusting seat includes a first panel, a second panel, and a slide block. The first panel is connected to the side of the support base. The second panel is connected to the first panel to form an L-shaped structure. The slide block is slidably provided on the second panel. The second adjusting cylinder is connected to the slide block. The adjusting part further includes a third adjusting cylinder and a tie rod. The third adjusting cylinder is provided on the other surface of the first panel facing the side of the support base. One end of the tie rod is connected to the third adjusting cylinder, and the other end of the tie rod passes through an opening groove formed in the second panel and is connected to the slide block. The welding deformation control device for a box-shaped structure according to claim 4.

7. The pressing rod has a rod-shaped structure with an adjustable telescopic length. During the welding process, the pressing rod adjusts its telescopic length based on the parameters feedback by the second sensor component to achieve adjustment with respect to the biasing position on the second welding surface. The welding deformation control device for a box-shaped structure according to claim 4.

8. The box body to be welded is a bolster, The bolster includes at least a through pipe, a first cover plate, and a second cover plate, The two through pipes are provided at intervals, The first cover plate is respectively connected to the two through pipes within the first welding surface, The second cover plate is respectively connected to the two through pipes within the second welding surface, Here, at least the thickness of the first cover plate is smaller than the thickness of the second cover plate. The welding deformation control device for a box-shaped structure according to any one of claims 1 to 7.

9. Obtaining the distortion amount parameter during the welding process of the box body to be welded, Generating an inverse deformation adjustment strategy for controlling the distortion amount of the welding surface of the box body to be welded based on the distortion amount parameter, Performing real-time inverse deformation adjustment on the box body to be welded during the welding process according to the inverse deformation adjustment strategy. A control method based on the welding deformation control device for a box-shaped structure according to any one of claims 1 to 8.

10. The step of obtaining the distortion amount parameter during the welding process of the box body to be welded as described above is specifically, Obtaining a first distortion characteristic value and a second distortion characteristic value during the welding process of the box body to be welded, where the first distortion characteristic value is the distortion region parameter of the box body to be welded, and the second distortion characteristic value is the distortion force parameter corresponding to the first distortion characteristic value, Generating the distortion amount parameter based on the first distortion characteristic value and the second distortion characteristic value. The refined control method for welding deformation of a box-shaped structure according to claim 9.

11. The step of generating an inverse deformation adjustment strategy for controlling the distortion amount of the welding surface of the box body to be welded based on the distortion amount parameter as described above is specifically, Obtaining a plurality of preset adjustment regions based on the welding surface of the box body to be welded, and obtaining all adjustment parts within the corresponding preset adjustment region based on the first distortion characteristic value. Generating adjustment displacement characteristic values based on each of the obtained adjustment units based on the second strain characteristic value, where the adjustment displacement characteristic values at least include a first direction displacement parameter perpendicular to the welding surface of the box body to be welded by the adjustment unit, and a second direction displacement parameter parallel to the welding surface of the box body to be welded by the adjustment unit; Generating the inverse deformation adjustment strategy based on the preset adjustment region based on all the adjustment displacement characteristic values; The method for fine control of welding deformation of a box structure according to claim 10.

12. The step of generating an inverse deformation adjustment strategy for controlling the amount of strain on the welding surface of the box body to be welded based on the strain amount parameter described above specifically includes: Obtaining the instantaneous welding region of the box body to be welded, performing dynamic fitting on the instantaneous welding region and the preset adjustment region, and obtaining an instantaneous adjustment region based on the dynamic fitting; Determining the adjustment units that are in an active state and outside the instantaneous adjustment region among the instantaneous adjustment regions, and sending a sleep signal to the corresponding adjustment units; Determining the adjustment units that are in a sleep state and within the instantaneous adjustment region among the instantaneous adjustment regions, and sending a wake-up signal to the corresponding adjustment units; The method for fine control of welding deformation of a box structure according to claim 11.

13. The step of generating an inverse deformation adjustment strategy for controlling the amount of strain on the welding surface of the box body to be welded based on the strain amount parameter described above specifically includes: Constructing a digital twin model based on the box body to be welded; Obtaining a twin strain amount parameter corresponding to the strain amount parameter of the box body to be welded in the digital twin model; Further including generating the inverse deformation adjustment strategy based on the twin strain amount parameter. The method for fine control of welding deformation of a box structure according to any one of claims 9 to 12.

14. Specifically, before the step of obtaining the strain amount parameter during the welding process of the box body to be welded described above: Constructing a finite element model based on the box body to be welded, and loading the welding parameters of the box body to be welded in the finite element model; Obtaining a first finite element eigenvalue and a second finite element eigenvalue based on the welding parameters in the finite element analysis process of the finite element model, wherein the first finite element eigenvalue is the inherent strain parameter of the box body to be welded, and the second finite element eigenvalue is the elastic strain parameter of the box body to be welded. Further comprising generating finite element analysis parameters based on the first finite element eigenvalue and the second finite element eigenvalue, and generating the inverse deformation adjustment strategy based on the finite element analysis parameters and the strain amount parameters. The method for refined control of welding deformation of a box-shaped structure according to any one of claims 9 to 12.

15. The step of performing real-time inverse deformation adjustment on the box body to be welded in the welding process according to the above-mentioned inverse deformation adjustment strategy is specifically: Obtaining a first inverse deformation adjustment determination and a second inverse deformation adjustment determination in the inverse deformation adjustment strategy, wherein the first inverse deformation adjustment determination includes the first welding surface of the box body to be welded, and the second inverse deformation adjustment determination includes the second welding surface of the box body to be welded. Controlling in real time the magnitude of the biasing force of the adjusting part to the first welding surface according to the first inverse deformation adjustment determination. Controlling in real time the magnitude and / or the biasing position of the biasing force of the adjusting part to the second welding surface according to the second inverse deformation adjustment determination. The method for refined control of welding deformation of a box-shaped structure according to any one of claims 9 to 12.

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