Welding deformation control method for large-size thin plate components with a thickness of less than 10 mm

Abstract

The present application provides a welding deformation control method for large-sized thin plate components with a thickness of less than 10 mm, which is applied to the technical field of welding and forming of thin plate components, and specifically includes the following steps: S1, selecting a reinforcement starting position and welding the first transverse rib plate, S2, welding the nth transverse rib plate at an adjacent transverse reinforcement position, wherein n=t+1, t is the number of times step S2 is executed, S3, welding the longitudinal rib plate between the thin plate spacing of the nth transverse rib plate and the n-1th transverse rib plate according to the number and position requirements of the longitudinal reinforcement, S4, repeating steps S2-S3 until n=p, p is the minimum value that meets the requirement of the number of transverse reinforcements, and the cross-sectional size of the rib plate is d×h, wherein d is the thickness of the rib plate, h is the height of the rib plate, then d≥8mm and h≥100mm; the area of ​​the maximum intercostal area is S max , then S max ≤4.5m 2 This method can not only control the flatness of the thin plate after welding within the required range, but also improve the efficiency of welding and forming of thin plate components.

Description

Technical Field

[0001] The present application relates to the technical field of thin steel plate welding and forming, and in particular to a method for controlling welding deformation of large-sized thin plate components with a thickness of less than 10 mm. Background Art

[0002] The vortex baffle is a component connected between the steel box girders of the serving steel bridge to improve the aerodynamic performance and wind resistance stability of the section. It is generally not used as the main load-bearing structure of the entire bridge. It is mostly designed in the form of a thin plate with a thickness of generally less than 10mm. The flatness of the surface of the vortex baffle is one of the key indicators for measuring the appearance quality of a steel bridge. During the welding and forming process of the vortex baffle, due to the insufficient restraint capacity and poor rigidity of the thin plate itself, the existence of welding stress will cause undesirable welding deformation on the surface of the thin plate, thereby reducing the flatness of the surface of the thin plate. Therefore, it is necessary to study the welding deformation control method of thin plate components such as vortex baffles.

[0003] There are several welding deformation control methods for thin plate components in the prior art:

[0004] 1. Improve the thin plate welding positioning tooling and the corresponding welding process to make the welding process for thin plates more stable, and optimize the relevant welding sequence to achieve the effect of improving welding deformation;

[0005] Second, the reverse deformation method is adopted, that is, a certain reverse deformation is applied to the thin plate to be welded in advance according to the prediction to offset or reduce the welding deformation of the thin plate, including the reverse deformation of the whole plate and the local reverse deformation.

[0006] The first method is usually suitable for welding thin steel plates with relatively thick plate thickness (the thickness of the grid plate is generally more than 30mm), small overall size and easy positioning in ship projects. The welded steel plates are difficult to apply to the box girder structure of steel bridges. The main reasons are as follows:

[0007] In steel bridge projects, the flatness requirements of thin plates are high, and generally the flatness is required to be no more than 1mm / m. In ship projects that also use a large number of thin plates, the flatness requirement for the outer plate is only 4mm / m. In the upper construction area of ​​non-main load-bearing structures, the flatness requirement for the thin plate is only 6mm / m. Therefore, the steel plate obtained by the above method is difficult to meet the flatness requirements of steel bridge thin plates.

[0008] The requirements for thermal correction are high. According to the requirements of Section 5.3.3 of the "Construction Specifications for the Manufacture and Installation of Highway Steel Structure Bridges" (JTG / T3651-2022), it is strictly forbidden to use water quenching during thermal correction to prevent the steel plate from brittle linear shapes. This is different from the thermal correction requirements for thin steel plates used in shipbuilding projects, and the above-mentioned welding deformation control method generally does not limit the method of thermal correction, so the resulting steel plate is likely to not meet the specifications of the above-mentioned steel bridge project.

[0009] For the second method, the effect is better when the whole plate is reversed, but for the local angular deformation caused by the welding of stiffening ribs, a lot of pyrotechnic correction is still required after welding. Not only is the correction difficult but the effect after correction is unknown. In some correction processes, the surface flatness of the thin plate may even decrease.

[0010] In addition, when large-size thin steel plates less than 10 mm are used as component panels, their internal ribs are often also in the form of thin plates, that is, steel plates less than 10 mm are used as ribs. Therefore, the component itself has insufficient restraint, and the direction of local plastic deformation of the steel plate cannot be controlled during thermal correction. In other words, the deformed area "wanders" on the surface of the steel plate during the thermal correction process.

[0011] In view of the above situation, for large-sized thin plate components such as the above-mentioned vortex baffles, which have no butt joints, few stiffening structures, less welding volume, and poor self-constraint, it is necessary to seek other methods to further reduce the welding deformation of the thin plate so that the flatness of the thin plate after welding can meet the desired range, while reducing the operating difficulty of the thin plate components during the welding forming process. Summary of the invention

[0012] In view of this, the embodiments of this specification provide a method for controlling welding deformation of a large-sized thin plate component with a thickness of less than 10 mm, which specifically includes the following steps:

[0013] S1, selecting a starting point for transverse reinforcement on the thin plate and welding the first transverse reinforcement plate at the starting point;

[0014] S2, welding the nth transverse rib plate at the transverse reinforcement position on the thin plate adjacent to the previous transverse rib plate, where n=t+1, t is the number of times step S2 is performed;

[0015] S3. Weld the longitudinal ribs between the thin plate spacing of the nth transverse rib and the n-1th transverse rib according to the number and position requirements of the longitudinal reinforcements;

[0016] S4, repeat steps S2-S3 until n=p, where p is the minimum value that meets the requirement of transverse reinforcement quantity;

[0017] The cross-sectional dimensions of the rib plate are d×h, where d is the rib plate thickness and h is the rib plate height, then d≥8mm and h≥100mm; the independent grid-shaped areas divided by any adjacent transverse rib plates and adjacent longitudinal rib plates on the thin plate are taken as the intercostal areas, and the area of ​​the largest intercostal area on the thin plate is S max , then S max ≤4.5m 2 .

[0018] In order to optimize the above scheme, the following technical measures are also taken:

[0019] As a preferred embodiment, S max ≤1m 2 .

[0020] As a preferred embodiment, among all the transverse ribs, the transverse ribs located at the two end sides adopt triangular ribs with cross-sectional dimensions of d1×h1, and the transverse ribs on the non-end sides adopt triangular ribs with cross-sectional dimensions of d1×h1 or flat strip ribs with cross-sectional dimensions of d2×h2, where h1≥h2.

[0021] As a preferred embodiment, the longitudinal rib plate is a flat strip rib plate with a cross-sectional size of d2×h2.

[0022] As a preferred embodiment, d1 ≥ 8 mm, d2 ≥ 10 mm.

[0023] As a preferred embodiment, let L be the distance between the transverse rib plate adjacent to any end face of the thin plate along the length direction of the thin plate and the corresponding end face of the thin plate, then L≤100 mm.

[0024] As a preferred embodiment, the following step is added after step S4: welding the longitudinal ribs in the plate edge area between at least one of the two thin plate end faces and the adjacent transverse ribs along the length direction of the thin plate according to the number and position requirements of the longitudinal reinforcement.

[0025] As a preferred embodiment, the longitudinal ribs are welded by intermittent welding, and the transverse ribs are welded by fillet welding.

[0026] As a preferred embodiment, before starting step S1, the thin plate component includes a main panel and inherent transverse ribs and inherent longitudinal ribs arranged on the main panel, and the inherent longitudinal ribs are located at the edge area of ​​the thin plate along the width direction of the thin plate.

[0027] As a preferred embodiment, the thin plate area of ​​the thin plate component is denoted as k×w, wherein k is the length of the thin plate, and w is the width of the thin plate, then k≥8m, and w≥3m.

[0028] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0029] First, this embodiment resists the local deformation of the thin plate unit during the welding process by reasonably adding transverse ribs and longitudinal ribs that meet specific size requirements on the thin plate. Different from the reverse deformation method, this rigid reinforcement scheme can not only directly reduce the surface deformation of the thin plate during the welding process, but also eliminates the need for thermal correction of the component after welding. It can control the flatness of the thin plate surface after welding within the required range and improve the welding forming efficiency of the thin plate component.

[0030] Furthermore, this rigid reinforcement scheme can also provide a certain rigidity for the component itself, thereby preventing the plate unit from deforming during the transportation or lifting process of the thin plate component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a flow chart of the first embodiment of the present application;

[0033] Figure 2 The thin plate member tested in Example 1 of the present application has a reinforcement density of 9m 2 Finite element simulation result diagram of surface flatness when ;

[0034] Figure 3 The thin plate member tested in Example 1 of the present application has a reinforcement density of 4.5m 2 Finite element simulation result diagram of surface flatness when ;

[0035] Figure 4 The thin plate member tested in Example 1 of the present application has a reinforcement density of 3.4m 2 Finite element simulation result diagram of surface flatness when ;

[0036] Figure 5 The thin plate member tested in Example 1 of the present application has a reinforcement density of 1m 2 Finite element simulation result diagram of surface flatness when ;

[0037] Figure 6 It is a rib plate layout diagram of the thin plate component in Example 1 of the present application;

[0038] Figure 7This is a rib layout diagram of the thin plate component in Example 2 of the present application. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0040] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0041] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0042] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] Embodiment 1:

[0044] The embodiments of this specification propose a method for controlling welding deformation of large-sized thin plate components with a thickness of less than 10 mm, aiming to solve the problem in the prior art that large-sized thin steel plates with no butt joints, few stiffening structures, small welding amounts, and poor self-constraint have large surface deformation during welding. This method can not only effectively reduce the welding deformation of thin plate components, but also improve the efficiency of the welding process. In addition, rigid reinforcement can also provide a certain rigidity for the component itself to resist the deformation of the plate unit during transportation or lifting.

[0045] refer to Figure 1 and Figure 5 As shown, Figure 5 The coordinate directions of the X-axis, Y-axis and Z-axis are shown respectively. In this embodiment, the length direction of the thin plate is parallel to the X-axis direction, the width direction of the thin plate is parallel to the Y-axis direction, the transverse direction may be the width direction of the thin plate, and the longitudinal direction may be the length direction of the thin plate. Specifically, the welding deformation control method includes the following steps:

[0046] S1, selecting a starting point for transverse reinforcement on the thin plate and welding the first transverse reinforcement plate at the starting point;

[0047] In this embodiment, the starting point position can be set at a position close to one end face of the thin plate along the length direction, and then in subsequent welding, the positions of the transverse reinforcements are calibrated in sequence along the length direction and the corresponding transverse ribs are welded at the calibrated positions.

[0048] In other embodiments, the starting point may be set at the center of the thin plate, and then in subsequent welding, the positions of the transverse reinforcements are marked on both end faces of the thin plate in turn and the corresponding transverse ribs are welded at the marked positions.

[0049] This embodiment does not impose any specific restrictions on this, but since the first method of gradually welding the transverse ribs along the length direction has a single welding direction, the welding operation is relatively convenient and the welding efficiency is relatively high, it becomes the preferred method of this embodiment.

[0050] S2, welding the nth transverse rib plate at the current target position of the transverse reinforcement adjacent to the previous transverse rib plate on the thin plate, where n=t+1, t is the number of times step S2 is performed;

[0051] S3. Weld the longitudinal ribs between the thin plate spacing of the nth transverse rib and the n-1th transverse rib according to the number and position requirements of the longitudinal reinforcements;

[0052] S4, repeat steps S2-S3 until n=p, where p is the minimum value that meets the requirement of transverse reinforcement quantity;

[0053] The cross-sectional dimensions of the rib plate are d×h, where d is the rib plate thickness and h is the rib plate height, then d≥8mm and h≥100mm; the independent grid-shaped areas divided by any adjacent transverse rib plates and adjacent longitudinal rib plates on the thin plate are taken as the intercostal areas, and the area of ​​the largest intercostal area on the thin plate is S max , then S max ≤4.5m 2 .

[0054] In this embodiment, when welding is specifically implemented, the first transverse rib is first positioned and welded on the thin plate, and then the second transverse rib is welded at the adjacent target reinforcement position, and then a predetermined number of longitudinal ribs are welded between the second transverse rib and the first transverse rib. Next, each time a transverse rib is welded, a predetermined number of longitudinal ribs are welded within the thin plate spacing between the transverse rib and the previous transverse rib until the number of transverse ribs welded meets the requirements. Compared with the traditional method of welding and correcting the longitudinal ribs and transverse ribs separately, this method of alternately welding the longitudinal ribs and transverse ribs as one piece can improve the overall stiffness in the panel area by welding the transverse ribs before welding each set of longitudinal ribs, thereby effectively reducing the influence of welding angle deformation.

[0055] In this embodiment, the local deformation of the thin plate unit during the welding process is resisted by reasonably adding transverse ribs and longitudinal ribs that meet specific size requirements on the thin plate. The cross-sectional dimensions of the ribs here are not less than 8×100mm. The reason for constraining the cross-sectional dimensions of the ribs is that on the one hand, the thickness of the added ribs is related to the effective constraint formed on the main panel, and on the other hand, the cross-sectional dimensions of the added ribs in the thickness and height directions are related to the stiffness of the ribs themselves. By ensuring that the effective constraint formed on the main panel and the stiffness of the ribs themselves meet the design requirements, the welding deformation area can be prevented from "wandering" on the steel plate.

[0056] It should be noted that the transverse ribs in this embodiment are all triangular ribs with a cross-sectional size of d1×h1, and the longitudinal ribs are all flat strip ribs with a cross-sectional size of d2×h2, where h1≥h2.

[0057] Preferably, h1 is 300-600 mm, and h2 is 100-150 mm.

[0058] Preferably, d1 ≥ 8 mm and d2 ≥ 10 mm.

[0059] In this embodiment, the area S of the largest intercostal region is max To measure and express the reinforcement density, it can be understood that when the S maxWhen the numerical value of S is constrained, the quantity and position requirements of transverse and longitudinal reinforcements are naturally restricted. max ≤4.5m 2 At the same time, the flatness of the main panel of the thin plate component after welding can be effectively controlled. The above results will be analyzed and verified by finite element simulation tests and verification tests in real scenarios.

[0060] This rigid reinforcement scheme is different from the reverse deformation method. It can not only directly reduce the surface deformation of the thin plate during welding, but also eliminate the need for thermal correction of the component after welding. It can control the surface flatness of the thin plate within the required range and improve the welding forming efficiency of the thin plate component. Furthermore, this rigid reinforcement scheme can also provide a certain rigidity for the component itself, thereby preventing the plate unit from deforming during transportation or lifting of the thin plate component.

[0061] Next, this embodiment uses the vortex baffle used in a steel bridge as a reference object, and uses Ansys finite element analysis software to perform finite element simulation analysis on the reinforcement process of the thin plate component. The vortex baffle uses a thin steel plate with a thickness of 8mm as the product panel, and the maximum panel area is 8×3m. In the original design, only two inherent transverse ribs are arranged, and a 6×70mm inherent longitudinal rib is arranged at the free end longitudinally (that is, in the edge area of ​​the thin plate along the width direction of the thin plate). The vortex baffle has typical thin plate structural characteristics of weak panel structure, few and weak stiffening ribs, and less welding.

[0062] It should be noted that according to construction experience, when the components are transported, there will be no obvious deflection or local deformation due to gravity. During this process, the components themselves often have good rigidity, that is, they have a strong ability to resist deformation. Therefore, in order to improve the analysis efficiency, finite element simulation and analysis are carried out based on the static analysis of the components in the installed state.

[0063] In addition, the main panel of the thin plate component used in the finite element simulation is an L-shaped panel with a right-angled side. In other embodiments, the main panel may also be a flat panel, which is not limited.

[0064] refer to Figure 2-Figure 5 , respectively show the finite element simulation results of thin plate components under different reinforcement densities, summarized in the following table:

[0065] ;

[0066] From the analysis of the above table, we can see that with the increase of reinforcement density, the flatness value on the main panel of the thin plate component in the free state tends to decrease gradually. max ≤4.5m2 When S max Take less than 1m 2 When the value reaches a certain level, the flatness will inevitably be lower than 1mm, which can fully meet the flatness requirements of steel bridge thin plates.

[0067] In order to verify the results of finite element analysis and examine the influence of the cross-sectional dimensions of the rib plate on the welding deformation of the thin plate, the first set of verification tests was designed in this embodiment:

[0068] A thin steel plate with a thickness of 8mm is selected, and transverse ribs are added along the length of the thin plate. The transverse reinforcement is implemented at 1.5m / stage, that is, a transverse rib is welded every 1.5m along the length of the thin plate. The transverse rib here is a triangular rib with a cross-sectional size of 8×500mm, and the cross-sectional height of the triangular rib is consistent with the height of the smallest rectangle circumscribed thereto. Among all the transverse ribs, the distance between the transverse ribs at both ends and the adjacent thin plate end faces is 500mm. Simultaneously, a longitudinal rib is added in the width direction of the thin plate. The longitudinal rib here is a flat strip rib with a cross-sectional size of 6×70mm. The overall reinforcement density is measured by the area of ​​the largest intercostal area, S max ≈1.5m 2 .

[0069] The flatness is measured using a 1m inspection ruler. The test results show that the flatness of the product in the plate unit stage after welding is 20-30mm. The flatness result is quite different from the result based on finite element analysis. Combined with the observation of panel deformation, it is believed that when the thickness of the added rib plate is only 6mm, the deformation area of ​​the panel can pass through the rib plate, and the rib plate does not form an effective constraint. Therefore, the added rib plate needs to have a larger cross-sectional size so that it can form an effective constraint and suppress the deformation of the thin plate during welding.

[0070] In view of this, a control test was designed in this embodiment. In the control test, the other test conditions were the same as those of the first group of verification tests, except that the longitudinal ribs were replaced with flat strip ribs with a cross-sectional size of 10×100 mm. The test results showed that the flatness of the product in the plate unit stage after welding was 6 to 10 mm, that is, after being replaced with longitudinal ribs with a larger cross-sectional size, the flatness value of the product was significantly reduced. The results also further verified the analysis of the influence of the cross-sectional size of the added ribs on the welding deformation of the thin plate.

[0071] At the same time, combined with the observation of panel deformation, the position of the thin plate adjacent to the end face has a more serious wave-like deformation. It is believed that when the distance between the end side transverse rib plate and the corresponding thin plate end face is large, it is impossible to form an effective restraint on the thin plate in the corresponding end area. In view of this, this embodiment designs another control test. The other test conditions are the same as the first group of control tests. Only the transverse rib plate is added at the position adjacent to the thin plate end face. The distance between the transverse rib plate adjacent to any thin plate end face along the length direction of the thin plate and the corresponding thin plate end face is L, L≤100mm. Combined with the observation of panel deformation, the deformation of the thin plate end face has been effectively improved. The test results show that the flatness of the plate unit stage product after welding is about 4~6mm. The results also further verify the analysis of the influence of the distance between the end side transverse rib plate and the corresponding thin plate end face on the flatness of the thin plate end area after welding.

[0072] Preferably, the following step S5 is added after step S4: longitudinal ribs are welded in the plate edge region between at least one of the two plate end faces and the adjacent transverse ribs along the length direction of the thin plate according to the number and position requirements of the longitudinal reinforcement. A predetermined number of longitudinal ribs are further added at the position of the plate end face, thereby increasing the rigidity of the plate end face, so that the deformation of the plate edge during welding, transportation or hoisting of the thin plate can be further reduced.

[0073] refer to Figure 6 As shown, it should be noted that the transverse ribs used in this embodiment are all triangular ribs with a large cross-sectional area, so that along the length direction of the thin plate component, the ribs have a good restraining force on the thin plate, which can effectively suppress the welding deformation of the thin plate component along the length direction. However, as the number of triangular ribs increases, the economic efficiency of the component also decreases.

[0074] In order to seek a more reasonable and economical reinforcement scheme and further verify the influence of reinforcement density and reinforcement cross-sectional size on thin plate welding deformation, this specification also provides Example 2.

[0075] Embodiment 2:

[0076] refer to Figure 7 As shown, a second group of verification tests is designed in this embodiment. The difference between this verification test and the first group of verification tests is that transverse ribs are added along the length direction of the thin plate, wherein the transverse ribs at the end side adopt the above-mentioned triangular ribs with a larger cross-sectional area, and the cross-sectional size of the triangular ribs is 8×500mm, and at least part of the transverse ribs at the non-end side position adopt 10×100mm flat strip ribs, and simultaneously two longitudinal ribs are added in the width direction of the thin plate, and the longitudinal ribs adopt 10×100mm flat strip ribs. The longitudinal reinforcement is implemented at 1.1 meters / stage, and the overall reinforcement density is measured by the area of ​​the maximum intercostal area, S max ≈1m2 The flatness was measured using a 1m inspection ruler, and the test results showed that the flatness of the product at the unit stage of the plate after welding was 5mm.

[0077] As a preference, the longitudinal ribs are all welded with 200×200 intermittent welding, and the other transverse ribs are all welded with fillet welding, with a fillet weld of 6mm.

[0078] In this embodiment, on the basis of ensuring the reinforcement density, at least part of the triangular ribs with a larger cross-sectional area at the non-end side position of the thin plate are replaced with flat strip ribs with a relatively smaller cross-sectional area. This can not only achieve the technical purpose of controlling the welding deformation of the thin plate components, but also further reduce the construction cost and economic cost.

[0079] In summary, in the above embodiments, when performing deformation analysis of thin plate structures, structural statics analysis in finite element analysis is used to replace the more complex thermodynamic analysis, thereby improving analysis efficiency, exploring the law of structural deformation, and providing ideas for solving similar problems in the future.

[0080] It can be seen from the finite element analysis in Example 1 that as the reinforcement density increases, the rigidity of the component gradually increases, its ability to resist deformation also increases accordingly, and the flatness value after welding also decreases.

[0081] Combining finite element analysis and two sets of verification tests, it can be seen that when the encryption degree reaches S max =1m 2 The flatness of the component after welding can reach 5mm; the rib plate, as the main load-bearing structure of the thin plate, should also reach a certain strength. The test shows that the reinforced section size d×h at least satisfies d≥8mm and h≥100mm. From the control test, it can be seen that the distance between the end side transverse rib plate and the corresponding thin plate end face should be controlled within 100mm to prevent wave deformation of the free edge.

[0082] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for controlling welding deformation of a large-size thin plate component with a thickness of less than 10 mm, wherein the thin plate area of ​​the large-size thin plate component is k×w, wherein k is the length of the thin plate, and w is the width of the thin plate, then k≥8m, and w≥3m, characterized in that: The steps include: S1, selecting a starting point for transverse reinforcement on the thin plate and welding the first transverse reinforcement plate at the starting point; S2, welding the nth transverse rib plate at the transverse reinforcement position on the thin plate adjacent to the previous transverse rib plate, where n=t+1, t is the number of times step S2 is performed; S3. Weld the longitudinal ribs between the thin plate spacing of the nth transverse rib and the n-1th transverse rib according to the number and position requirements of the longitudinal reinforcements; S4, repeat steps S2-S3 until n=p, where p is the minimum value that meets the requirement of transverse reinforcement quantity; The cross-sectional size of any one of the transverse ribs and the longitudinal ribs is d×h, where d is the rib thickness and h is the rib height, then d≥8mm and h≥100mm; the independent grid-shaped area divided by any adjacent transverse ribs and adjacent longitudinal ribs on the thin plate is taken as the intercostal area, and the area of ​​the largest intercostal area on the thin plate is S max , then S max ≤4.5m 2 ; After S4, the following steps are also included: The longitudinal ribs are welded in the plate edge region between at least one of the two plate end faces and the adjacent transverse ribs along the length direction of the thin plate according to the quantity and position requirements of the longitudinal reinforcements.

2. The method for controlling welding deformation of a thin plate member according to claim 1, characterized in that: S max ≤1m 2 。 3. The method for controlling welding deformation of a thin plate member according to claim 1, characterized in that: Among all the transverse ribs, the ones located at the two end sides are triangular ribs with a cross-sectional size of d1×h1, and the transverse ribs on the non-end sides are triangular ribs with a cross-sectional size of d1×h1 or flat strip ribs with a cross-sectional size of d2×h2, where h1≥h2.

4. The method for controlling welding deformation of a thin plate member according to claim 3, characterized in that: The longitudinal rib plate is a flat strip rib plate with a cross-sectional size of d2×h2.

5. The method for controlling welding deformation of a thin plate member according to claim 3 or 4, characterized in that: d1≥8mm, d2≥10mm.

6. The method for controlling welding deformation of a thin plate member according to claim 1, characterized in that: The distance between the transverse rib plate adjacent to any end face of the thin plate along the length direction of the thin plate and the corresponding end face of the thin plate is L, then L≤100mm.

7. The method for controlling welding deformation of a thin plate member according to claim 1, characterized in that: The longitudinal ribs are welded by intermittent welding, and the transverse ribs are welded by fillet welding.

8. The method for controlling welding deformation of a thin plate member according to claim 1, characterized in that: Before starting to execute step S1, the thin plate component includes a main panel and inherent transverse ribs and inherent longitudinal ribs arranged on the main panel, and the inherent longitudinal ribs are located at the edge area of ​​the thin plate along the width direction of the thin plate.

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