Method for flattening a sheet of a ship

Abstract

The present application relates to the field of shipbuilding, and provides a ship plate flattening method. The ship plate flattening method comprises the following steps in sequence: fixing a first positioning assembly on a small assembly and restraining the freedom of the first positioning assembly so as to fix the position of the first positioning assembly; flattening the small assembly; releasing the freedom of the first positioning assembly and dismounting the first positioning assembly from the small assembly. By fixing the first positioning assembly on the small assembly and fixing the position of the first positioning assembly so as to fix the position of the small assembly, the small assembly meets the requirement of the flattening process. The flattening is performed in the small assembly stage, the flattening process is advanced, the flattening process is dispersed, and the problem that the flattening workload is large and the subsequent period of the flattening process is nervous caused by the concentration of the flattening in the later stage of the shipbuilding can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship manufacturing, and relates to a ship plate flattening method. BACKGROUND

[0002] In existing ships, the hull is generally assembled by a plurality of small plate assemblies into a middle assembly, a plurality of middle assemblies are assembled into a plate section, and a plurality of plate sections and a deck, an outer plate and the like are assembled into a hull. The plate section has a large irregular deformation, and the flatness of the hull has a requirement. For example, the flatness requirement of a cruise ship is relatively high, and the plate section needs to be flattened to meet the flatness requirement. At present, electromagnetic flattening is generally used to flatten the plate section of the hull. Electromagnetic flattening needs to be constructed under the condition of structural constraint on the periphery, cannot be interrupted during the process, and must be extended to the surrounding wall structure. Therefore, at present, the flattening is generally performed in the later stage of hull construction, after the plate section, the deck and the outer plate are all welded, and the outer plate is used as a constraint to flatten the plate section. Since the flattening stage is set in the later stage of hull construction, and the plate section has a large deformation, the flattening workload is large, which leads to a very tight period of interior construction. SUMMARY

[0003] The present application aims to solve the problem that the flattening of the plate section of the hull in the prior art is concentrated in the later stage of hull construction, leading to a tight construction period of the ship. The present application provides a ship plate flattening method.

[0004] The present application solves the above technical problems by the following technical scheme:

[0005] A ship plate flattening method, comprising the following steps in sequence:

[0006] S11, fixing a first positioning assembly on a small assembly and constraining the degrees of freedom of the first positioning assembly to fix the position of the first positioning assembly;

[0007] S12, flattening the small assembly;

[0008] S13, releasing the degrees of freedom of the first positioning assembly and dismounting the first positioning assembly from the small assembly.

[0009] In the technical scheme, the first positioning assembly is fixed on the small assembly, and the degrees of freedom of the first positioning assembly are constrained, so that the first positioning assembly and the small assembly on the first positioning assembly are fixed in position, and the small assembly meets the requirement of the flattening process. After the small assembly is flattened, the first positioning assembly is dismounted to avoid increasing the weight of the hull and affecting the subsequent process. The flattening is performed in the small assembly stage, the flattening process is advanced, the flattening process is dispersed, and the problem that the flattening workload is large and the subsequent period of the flattening process is tight due to the concentration of the flattening in the later stage of hull construction can be avoided.

[0010] Preferably, the first positioning assembly comprises a plurality of first positioning members arranged along the length direction of the small assembly.

[0011] Preferably, in the step S11, the small assembly and the first positioning assembly are detachably connected.

[0012] Preferably, the ship plate flattening method further comprises the following steps in sequence:

[0013] S21, assembling a plurality of the small assemblies into a middle assembly;

[0014] S22, fixing a second positioning assembly on the middle assembly to constrain the edges of the middle assembly and fix the position of the middle assembly;

[0015] S23, flattening the middle assembly;

[0016] In the step S21, the small assemblies subjected to the steps S11, S12 and S13 and / or the small assemblies not subjected to the steps S11, S12 and S13 are assembled into the middle assembly.

[0017] In the present technical solution, the second positioning assembly is fixed on the middle assembly to constrain the edges of the middle assembly and fix the position of the middle assembly, so that the middle assembly meets the requirements of the flattening process. The flattening is performed in the middle assembly stage, which can correct the unevenness of the small assemblies after being assembled into the middle assembly, and can also advance the flattening process, facilitate the dispersion of the flattening process, and avoid the problems of large flattening workload and tight subsequent schedule of the flattening process caused by the concentration of the flattening in the later stage of the shipbuilding.

[0018] Preferably, in the step S21, when the small assemblies are assembled into the middle assembly, a plurality of first connection portions are arranged, the first connection portions are arranged along the length direction of the middle assembly and along the width direction of the middle assembly, and the second positioning assembly comprises:

[0019] a second positioning member arranged at the edge of the middle assembly and extending along the width direction of the middle assembly;

[0020] and / or at least two third positioning members arranged along the width direction of the middle assembly, the two third positioning members are arranged at the opposite edges of the middle assembly, and each third positioning member extends along the length direction of the middle assembly.

[0021] Preferably, the step S22 comprises the following steps in sequence:

[0022] S221, fixing the second positioning assembly on the middle assembly;

[0023] S222, arranging a plurality of positioning piles, the upper surfaces of the plurality of positioning piles being located in the same plane;

[0024] S223, placing the first connection on the positioning piles, and dispersing the plurality of positioning piles relative to the middle assembly to constrain the degrees of freedom of the middle assembly and fix the position of the middle assembly.

[0025] Preferably, the ship plate flattening method further comprises the following steps in sequence:

[0026] S31, assembling a plurality of middle assemblies into a plate segment;

[0027] S32, arranging a third positioning assembly on the plate segment to constrain the edges of the plate segment and fix the position of the plate segment;

[0028] S33, flattening the plate segment;

[0029] S34, disassembling at least part of the third positioning assembly from the plate segment;

[0030] In the step S31, the middle assemblies subjected to the steps S22 and S23 and / or the middle assemblies not subjected to the steps S22 and S23 are assembled into the plate segment.

[0031] In the technical solution, the third positioning assembly is fixed on the plate segment to constrain the edges of the plate segment and fix the position of the plate segment, so that the plate segment meets the requirements of the flattening process. Flattening is performed in the plate segment stage, which can correct the unevenness of the middle assemblies after being assembled into the plate segment, and can also advance the flattening process, facilitate the dispersion of the flattening process, and avoid the problems of large flattening workload and tight subsequent schedule of the flattening process caused by the concentration of the flattening process in the later stage of shipbuilding.

[0032] Preferably, 250mm≤ the distance between the second positioning assembly and the nearest side edge of the middle assembly ≤ 350mm;

[0033] And / or, 250mm≤ the distance between the third positioning assembly and the nearest side edge of the middle assembly ≤ 350mm.

[0034] Preferably, the first positioning assembly is fixed on the reverse side of the small assembly, the second positioning assembly is fixed on the front side of the middle assembly, and the third positioning assembly is fixed on the reverse side of the plate segment.

[0035] Preferably, the ship plate flattening method further comprises the following steps:

[0036] S24, dismounting at least part of the second positioning assembly from the middle assembly;

[0037] The step S24 is performed after the step S23; the step S24 is performed before the step S31, and / or after the step S33.

[0038] The positive progress effect of the present application is that:

[0039] The small assembly satisfies the requirement of performing the flattening process by fixing the first positioning assembly on the small assembly and fixing the position of the first positioning assembly so as to fix the position of the small assembly. The flattening is performed in the small assembly stage, the flattening process is advanced, the dispersion of the flattening process is facilitated, and the problem of large flattening workload and tight subsequent period of the flattening process caused by the concentration of the flattening in the later stage of the ship body construction is avoided. The first positioning assembly is dismounted after the small assembly is flattened, so as to avoid the increase of the weight of the ship body and the influence on the subsequent process. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The figure is a structure diagram of the small assembly and the first positioning assembly of an embodiment of the present application;

[0041] Figure 2 The figure is a structure diagram of the small assembly fixing point of an embodiment of the present application;

[0042] Figure 3A The figure is a flattening construction diagram of the small assembly with 5mm≤flatness≤8mm of an embodiment of the present application;

[0043] Figure 3B The figure is a flattening construction diagram of the small assembly with 5mm≤flatness≤8mm of an embodiment of the present application;

[0044] Figure 4A The figure is a flattening construction diagram of the small assembly with 5mm≤flatness≤8mm of an embodiment of the present application;

[0045] Figure 4B The figure is a flattening construction diagram of the small assembly with 5mm≤flatness≤8mm of an embodiment of the present application;

[0046] Figure 5A The figure is a flattening construction diagram of the small assembly with 8mm

[0047] Figure 5B The figure is a flattening construction diagram of the small assembly with 8mm

[0048] Figure 6AA schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 8mm < flatness ≤ 12mm;

[0049] Figure 6B A schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 8mm < flatness ≤ 12mm;

[0050] Figure 7A A schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 12mm < flatness ≤ 20mm;

[0051] Figure 7B A schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 12mm < flatness ≤ 20mm;

[0052] Figure 8A A schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 20mm < flatness;

[0053] Figure 8B A schematic diagram of the small group erection and flattening construction of the embodiment of the present application with 20mm < flatness;

[0054] Figure 9 A schematic diagram of the medium group erection and the structure of the second positioning assembly of the embodiment of the present application;

[0055] Figure 10 A schematic diagram of the medium group erection of the embodiment of the present application;

[0056] Figure 11 A schematic diagram of the position of the medium group erection and the positioning pile of the embodiment of the present application;

[0057] Figure 12 A schematic diagram of the structure of the medium group erection and the positioning pile of the embodiment of the present application;

[0058] Figure 13 A schematic diagram of the structure of the medium group erection of the embodiment of the present application;

[0059] Figure 14 A schematic diagram of the structure of the thin plate segment of the embodiment of the present application;

[0060] Figure 15 A schematic diagram of the structure of the medium group erection and the positioning pile of another embodiment of the present application.

[0061] Small group erection 1

[0062] Medium group erection 2, first connection 21, lifting lug 22, steel groove 23

[0063] Thin plate segment 3

[0064] First positioning member 41, fixed point 42

[0065] Second positioning member 51, third positioning member 52

[0066] Fourth positioning member 61, fifth positioning member 62

[0067] Positioning pile 7

[0068] Virtual plane 8

[0069] Front face 91, back face 92

[0070] Length direction L-1 of small group stand, width direction W-1 of small group stand

[0071] Length direction L-2 of middle group stand, width direction W-2 of middle group stand

[0072] Length direction L-3 of thin plate segment, width direction W-3 of thin plate segment DETAILED DESCRIPTION

[0073] The present application will be further described below by way of examples, but the present application is not limited in the scope of the examples.

[0074] Figures 1-14 The structural schematic diagram provided for an embodiment of the present application; Figure 15 The structural schematic diagram provided for another embodiment of the present application.

[0075] The ship thin plate flattening method comprises the following steps in sequence:

[0076] S11, fixing the first positioning assembly on the small group stand 1 and restraining the freedom of the first positioning assembly so as to fix the position of the first positioning assembly;

[0077] S12, flattening the small group stand 1;

[0078] S13, releasing the freedom of the first positioning assembly and dismounting the first positioning assembly from the small group stand 1.

[0079] The first positioning assembly is fixed on the small group stand 1 and the freedom of the first positioning assembly is restrained so as to fix the position of the first positioning assembly, thereby fixing the position of the small group stand 1 on the first positioning assembly and making the small group stand 1 meet the requirements of the flattening process. Flattening is performed on the small group stand 1 in advance, which can advance the flattening process, facilitate the dispersion of the flattening process, and avoid the problems of large flattening workload and tight subsequent schedule of the flattening process caused by concentrating on the flattening in the later stage of the shipbuilding. The first positioning assembly is dismounted after the small group stand 1 is flattened, so as to avoid increasing the weight of the ship and affecting the subsequent process.

[0080] As Figure 1As shown, the first positioning assembly includes a plurality of first positioning members 41 arranged along the length direction L-1 of the sub-assembly 1, each first positioning member 41 extending along the width direction W-1 of the sub-assembly 1, and the position of the first positioning member 41 is fixed by restricting the position of the first positioning member 41, so as to fix the position of the sub-assembly 1.

[0081] Specifically, in the embodiment, the first positioning assembly is arranged on the reverse surface 92 of the sub-assembly 1, so as to avoid affecting the flatness and smoothness of the front surface 91 of the sub-assembly 1 after the first positioning assembly is removed from the sub-assembly 1. In other embodiments, the first positioning assembly can also be arranged on the front surface 91 of the sub-assembly 1.

[0082] In the embodiment, the first positioning assembly is fixed on the sub-assembly 1 by buckling, and the position of the fixing point 42 of the buckle is as shown in the figure. Figure 2 As shown, the first positioning assembly and the sub-assembly 1 are fixed by buckling to form a detachable connection, so as to facilitate the removal of the first positioning assembly from the sub-assembly 1. In other embodiments, the first positioning assembly can also be welded on the sub-assembly 1, and then removed from the sub-assembly 1 by cutting.

[0083] In the embodiment, the position of the first positioning member 41 is fixed by inserting it into the steel groove, so as to fix the position of the sub-assembly 1. In other embodiments, the position of the first positioning member 41 can also be fixed by a fastener, or by other ways, so as to fix the position of the sub-assembly 1.

[0084] In the embodiment, the electromagnetic heating is used for flattening the sheet, and the local instant heating of the sheet causes the local heat to penetrate and generate thermal stress, and the material in the heated area shrinks, so as to deform the sheet and achieve the required flatness.

[0085] Figures 3A-8B The schematic diagram of the heating position and the heating sequence when the sub-assembly 1 is flattened is provided. It should be noted that, Figures 3A-8B In the figure:

[0086] The heating sequence is from the middle to both sides as a whole;

[0087] The circled numbers in the figure represent the heating sequence in the same local area, ① represents the first pass, and other numbers are the same, and the heating of ①-⑥ is performed in turn, and the first pass in each figure is located directly above the first positioning member 41;

[0088] Figure 3A 、 Figure 3B The two figures correspond to a processing method, Figures 4A-8B Similarly;

[0089] The arrow in the A figure represents the heating position;

[0090] When all the heating channels extend along the extension direction of the first positioning member 41, the interval between two identical channels is L3, 70mm≤L3≤100mm, and the interval between different channels is L2, 15mm≤L2≤15mm; when there are channels in the heating channel that are not parallel to the extension direction of the first positioning member 41, the interval between two identical channels is L1, 160mm≤L1≤170mm, and the interval between different channels is L2, 15mm≤L2≤15mm.

[0091] The unevenness of group 1 is illustrated using virtual plane 8 as a reference.

[0092] When the flatness of the sub-group 1 is ≤8mm and ≤5mm, the following can be adopted: Figure 3A , Figure 3B The heating method shown can also be used Figure 4A , 4B The construction method shown;

[0093] When the flatness of the sub-group 1 is less than 8mm and less than or equal to 12mm, the following can be adopted: Figure 5A , Figure 5B The heating method shown can also be used Figure 6A , 6B The heating method shown;

[0094] When the flatness of the sub-group 1 is less than 12mm and less than or equal to 20mm, the following can be adopted: Figure 7A , Figure 7B The heating method shown;

[0095] When the flatness requirement is less than 20mm, the following can be used: Figure 7A , Figure 7B The construction method shown;

[0096] This section only uses Figures 3A-4B This example will be used to illustrate the point; the same principle applies to others.

[0097] When the flatness of the group 1 is ≤8mm and ≤5mm, the following can be used: Figure 3A , Figure 3B The heating method shown applies induction heating to the front 91 of the sub-assembly 1. During heating, the middle part is heated first, and then the heating gradually moves outward along the length of the sub-assembly 1. The heating method for the heating areas of the sub-assembly 1 corresponding to each first positioning member 41 is the same: first heating the first layer shown in ①, and then heating the second layer shown in ②. Figure 3BAs shown in FIG. 1, when the intermediate portion is heated, each first path is gradually heated along the width direction of the small group stand 1 first, and the position interval between two adjacent first paths is L1, 160mm≤L1≤170mm; then each second path is gradually heated along the width direction of the small group stand 1, and each second path is located in the interval between two first paths and is diagonal to the two first paths.

[0098] When 5mm≤the flatness of the small group stand 1≤8mm, the heating method shown in FIG. 1 can also be used to perform induction heating on the front surface 91 of the small group stand 1, and when heating, the intermediate portion is heated first, and then gradually heated outward along the length direction of the small group stand 1. The heating method of the heating area of the small group stand 1 corresponding to each first positioning member 41 is the same, which is to heat the first path shown in FIG. 1 first, and then heat the second path shown in FIG. 1. Figure 4A Figure 4B As shown in FIG. 1, when the intermediate portion is heated, each first path is gradually heated along the width direction of the small group stand 1 first, and the position interval between two adjacent first paths is L1, 160mm≤L1≤170mm; then each second path is gradually heated along the width direction of the small group stand 1, and each second path is located in the interval between two first paths and is diagonal to the two first paths. Figure 4B

[0099] The ship plate flattening method further comprises the following steps in sequence:

[0100] S21, assembling a plurality of small group stands 1 into a middle group stand 2;

[0101] S22, fixing a second positioning assembly on the middle group stand 2 to constrain the edges of the middle group stand 2 and fix the position of the middle group stand 2;

[0102] S23, flattening the middle group stand 2;

[0103] In step S21, the small group stand 1 subjected to steps S11, S12 and S13 or the small group stand 1 not subjected to steps S11, S12 and S13 can be used to assemble the middle group stand 2, or a part of the small group stand 1 subjected to steps S11, S12 and S13 and another part of the small group stand 1 not subjected to steps S11, S12 and S13 can be used to assemble the middle group stand 2, that is, all the small group stands 1 subjected to flattening, all the small group stands 1 not subjected to flattening, or a part of the small group stands 1 subjected to flattening and another part of the small group stands 1 not subjected to flattening can be used.

[0104] ​​The second positioning component is fixed to the intermediate assembly 2 to constrain the edges of the intermediate assembly 2 and fix its position, ensuring that the intermediate assembly 2 meets the requirements for the leveling process. Leveling at the intermediate assembly 2 stage serves two purposes: firstly, it corrects unevenness after the sub-assemblies 1 are assembled into the intermediate assembly 2; secondly, advancing the leveling process facilitates its distribution and avoids the problem of a large workload and tight schedules caused by concentrating leveling work in the later stages of hull construction.

[0105] like Figures 9-10 As shown, in step S21, when the sub-assembly 1 is assembled into the intermediate assembly 2, a plurality of first connection points 21 are provided on the reverse side 92 of the intermediate assembly 2. The first connection points 21 are spaced apart along the length direction of the intermediate assembly 2 and spaced apart along the width direction of the intermediate assembly 2. The first connection points 21 can act as constraints on the intermediate assembly 2; when the distance between the first connection point 21 and the nearest side edge of the intermediate assembly 2 is less than 350mm, the first connection point 21 can act as a constraint on the edge of the intermediate assembly 2; when the distance between the first connection point 21 and the nearest side edge of the intermediate assembly 2 is greater than 350mm, a positioning element needs to be provided on the edge of the intermediate assembly 2 to constrain the edge of the intermediate assembly 2. Specifically, as shown... Figures 9-10 As shown, in this embodiment, the second positioning component includes:

[0106] The second positioning element 51 is disposed on the edge of the middle assembly 2 and extends along the width direction W-2 of the middle assembly 2;

[0107] Two third positioning members 52 are spaced apart along the width direction of the middle assembly 2. The two third positioning members 52 are located on two opposite edges of the middle assembly 2, and each third positioning member 52 extends L-2 along the length direction of the middle assembly 2.

[0108] In this embodiment, the distance between the second positioning element 51 and the nearest side of the middle assembly 2 is 300mm, and the distance between the third positioning element 52 and the nearest side of the middle assembly 2 is also 300mm. In other embodiments, 250mm ≤ the distance between the second positioning element 51 and the nearest side of the middle assembly 2 is ≤350mm, and 250mm ≤ the distance between the third positioning element 52 and the nearest side of the middle assembly 2 is ≤350mm. In other embodiments, the second positioning component may include only the second positioning element 51 or only the third positioning element 52, depending on whether the edge of the middle assembly 2 is constrained; in other embodiments, the number of third positioning elements 52 may be one or more, and the number of second positioning elements 51 may be one or more.

[0109] Specifically, in this embodiment, both the second positioning member 51 and the third positioning member 52 are made of No. 20 channel steel and are fixed to the front surface 91 of the central assembly 2. In other embodiments, the second positioning member 51 and the third positioning member 52 may be of other structures, and their positions relative to the central assembly 2 may differ from those in this embodiment. In other embodiments, the second positioning component may also be disposed on the front surface 91 of the central assembly 2.

[0110] In this embodiment, step S22 includes the following steps in sequence:

[0111] S221. Fix the second positioning component on the middle assembly 2;

[0112] S222. Set multiple positioning stakes 7, with the upper surfaces of the multiple positioning stakes 7 located in the same plane;

[0113] S223. Place the first connection 21 on the positioning stake 7, so that the multiple positioning stakes 7 are distributed relatively to the middle assembly 2, so as to constrain the degree of freedom of the middle assembly 2 and fix the position of the middle assembly 2.

[0114] like Figure 11 As shown, eight positioning stakes 7 are set up, with their upper surfaces on the same plane. The flatness of the upper surfaces of the positioning stakes 7 is relatively small, within ±5mm, to avoid large deformation after the middle assembly 2 is placed on the positioning stakes 7, thus making the measurement of the flatness of the middle assembly 2 more accurate. After the first connection 21 is placed on the positioning stakes 7, the positioning stakes 7 are dispersed relative to the middle assembly 2. Since the middle assembly 2 has a large weight, its position can be considered fixed.

[0115] Specifically, such as Figure 12 As shown, the reverse side 92 of the middle assembly 2 contacts the positioning stake 7, and the front side 91 of the middle assembly 2 is heated from above to level it. In other embodiments, such as Figure 15 As shown, the front 91 of the middle assembly 2 can be positioned facing the positioning pile 7, and the front 91 of the middle assembly 2 can be heated from below to level it.

[0116] like Figure 13 As shown, the middle assembly 2 is provided with lifting lugs 22, which facilitates the movement and transportation of the middle assembly 2. The front 91 of the middle assembly 2 is provided with a steel channel 23, which facilitates the locking of the second positioning member 51 and the third positioning member 52 in the steel channel 23.

[0117] The method for leveling thin plates in ships also includes the following steps in sequence:

[0118] S31. Assemble multiple intermediate assembly 2 into thin plate segments 3;

[0119] S32. A third positioning component is provided on the thin plate segment 3 to constrain the edge of the thin plate segment 3 and fix the position of the thin plate segment 3.

[0120] S33, flattening the sheet segment 3;

[0121] S34, dismounting at least part of the third positioning assembly from the sheet segment 3;

[0122] In step S31, the sheet segment 3 is assembled by using the intermediate assembly 2 with or without step S22, step S23, or by using the intermediate assembly 2 with step S22, step S23 in part, i.e., by using the intermediate assembly 2 with flattening in whole, by using the intermediate assembly 2 without flattening in whole, or by using the intermediate assembly 2 with flattening in part and the intermediate assembly 2 without flattening in part.

[0123] The third positioning assembly is fixed on the sheet segment 3 to constrain the edges of the sheet segment 3 and fix the position of the sheet segment 3, so that the sheet segment 3 meets the requirements of the flattening process. Flattening the sheet segment 3 in the stage can correct the unevenness of the intermediate assembly 2 after being assembled into the sheet segment 3, and can also advance the flattening process, facilitate the dispersion of the flattening process, and avoid the problems of large flattening workload and tight subsequent schedule of the flattening process caused by concentrating the flattening in the later stage of the shipbuilding.

[0124] In other embodiments, if the flatness of the sheet segment 3 meets the requirements, the sheet segment 3 can not be flattened.

[0125] As shown in FIG. 5, three edges of the sheet segment 3 are not constrained, and constraints need to be set on the three edges of the sheet segment 3. Specifically, the third positioning assembly includes: Figure 14

[0126] A fourth positioning member 61 is arranged at the edge of the sheet segment 3 and extends along the width direction W-3 of the sheet segment 3.

[0127] Two fifth positioning members 62 are arranged at two opposite edges of the sheet segment 3 along the width direction of the intermediate assembly 2, and each fifth positioning member 62 extends along the length direction L-3 of the sheet segment 3.

[0128] ​The distance between the fourth positioning member 61 and the nearest side of the thin plate segment 3 is 300 mm, and the distance between the fifth positioning member 62 and the nearest side of the thin plate segment 3 is 300 mm. In other embodiments, 250 mm≤ the distance between the fourth positioning member 61 and the nearest side of the thin plate segment 3≤350 mm, and 250 mm≤ the distance between the fifth positioning member 62 and the nearest side of the thin plate segment 3≤350 mm. In other embodiments, the second positioning assembly can only include the fourth positioning member 61 or only include the fifth positioning member 62, depending on whether the edges of the thin plate segment 3 are constrained. In other embodiments, the number of fourth positioning members 61 can be one or more, and the number of fifth positioning members 62 can be one or more.

[0129] Specifically, in the present embodiment, the fourth positioning member 61 and the fifth positioning member 62 are both No. 20 channel steel and are fixed to the reverse side 92 of the thin plate segment 3. In other embodiments, the fourth positioning member 61 and the fifth positioning member 62 can have other structures and can be positioned differently relative to the thin plate segment 3 than in the present embodiment. In other embodiments, the third positioning assembly can also be fixed to the front side 91 of the thin plate segment 3.

[0130] The ship thin plate flattening method further includes the following steps:

[0131] S24, at least part of the second positioning assembly is removed from the middle assembly 2;

[0132] Step S24 is performed after step S23; step S24 can be performed before step S31, or after step S33, or a part can be removed before step S31 and another part can be removed after step S33, depending on the position of the second positioning assembly; the structure of the second positioning assembly located in the joint of the total assembly of the ship body is left to be removed during the total assembly; the structure of the second positioning assembly located in the joint of the thin plate segment 3 is left to be removed during the thin plate segment 3 stage, i.e. removed after step S33; the structure of the second positioning assembly located in the temporary joint is removed before step S31. Similarly, step S34, the structure of the third positioning assembly located in the joint of the total assembly of the ship body is left to be removed during the total assembly; the structure of the third positioning assembly located in the joint of the thin plate segment 3 is removed after step S33.

[0133] When flattening the small assembly 1, the middle assembly 2, and the thin plate segment 3, the following steps are specifically included:

[0134] The flatness of the small assembly 1, the middle assembly 2, and the thin plate segment 3 is measured;

[0135] The sequence of heating for electromagnetic flattening is selected according to the flatness;

[0136] The flatness is checked after flattening.

[0137] Although the specific embodiments of the present application have been described above, it is understood by those skilled in the art that the present application is only illustrated by way of example, and the scope of protection of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the present application, and such changes and modifications fall within the scope of protection of the present application.

Claims

1. A method for leveling thin plates in ships, characterized in that, The steps are as follows: S11. Fix the first positioning component on the group stand and constrain the degrees of freedom of the first positioning component to fix the position of the first positioning component; S12. The small assembly is leveled using electromagnetic heating; S13. Release the degree of freedom of the first positioning component and remove the first positioning component from the group stand; S21. Assemble the multiple sub-assemblies into a medium assembly; S22. Fix the second positioning component on the middle assembly to constrain the edge of the middle assembly and fix the position of the middle assembly; S23. The intermediate assembly is leveled using electromagnetic heating; S31. Assemble the multiple intermediate components into thin plate segments; S32. A third positioning component is provided on the thin plate segment to constrain the edge of the thin plate segment and fix the position of the thin plate segment; S33. The thin plate is leveled in sections using electromagnetic heating; S34. Remove at least a portion of the third positioning component from the thin plate segment; In step S21, the intermediate assembly is formed by assembling the small assembly after steps S11, S12 and S13 and / or without steps S11, S12 and S13. In step S31, the thin plate segments are assembled using the intermediate assembly methods described in steps S22 and S23 and / or without the intermediate assembly methods described in steps S22 and S23.

2. The method for leveling thin plates of ships as described in claim 1, characterized in that, The first positioning component includes a plurality of first positioning elements spaced apart along the length direction of the small assembly, and each first positioning element extends along the width direction of the small assembly.

3. The method for leveling thin plates of ships as described in claim 1, characterized in that, In step S11, the small group stand and the first positioning component are detachably connected.

4. The method for leveling thin plates of ships as described in claim 1, characterized in that, In step S21, when the sub-assemblies are assembled into the intermediate assembly, a plurality of first connection points are provided. The first connection points are spaced apart along the length direction of the intermediate assembly and spaced apart along the width direction of the intermediate assembly. The second positioning component includes: The second positioning element is disposed on the edge of the central assembly and extends along the width direction of the central assembly; And / or, at least two third positioning members spaced apart along the width direction of the intermediate assembly, the two third positioning members being disposed on two opposite edges of the intermediate assembly, each of the third positioning members extending along the length direction of the intermediate assembly.

5. The method for leveling thin plates of ships as described in claim 4, characterized in that, Step S22 includes the following steps in sequence: S221. Fix the second positioning component on the middle assembly; S222. Set up multiple positioning stakes, with the upper surfaces of the multiple positioning stakes located in the same plane; S223. Place the first connection point on the positioning stake, so that the multiple positioning stakes are distributed relatively to the middle assembly, so as to constrain the degree of freedom of the middle assembly and fix the position of the middle assembly.

6. The method for leveling thin plates of ships as described in claim 1, characterized in that, 250mm≤ Distance between the second positioning component and the nearest side of the middle assembly ≤ 350mm; And / or, 250mm ≤ the distance of the third positioning component from the nearest side of the middle assembly ≤ 350mm.

7. The method for leveling thin plates of ships as described in claim 1, characterized in that, The first positioning component is fixed to the reverse side of the small assembly, the second positioning component is fixed to the front side of the middle assembly, and the third positioning component is fixed to the reverse side of the thin plate segment.

8. The method for leveling thin plates of ships as described in claim 1, characterized in that, The ship plate leveling method further includes the following steps: S24. At least a portion of the second positioning component is removed from the assembly. Step S24 is performed after step S23; step S24 is performed before step S31, and / or after step S33.

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