Flattening Method of Ship Plate Sub-assembly during the Overall Assembly Stage

Abstract

This application relates to the technical field of cruise ship manufacturing, and in particular to a method for leveling a ship's thin plate sub-assembly during the overall assembly stage. It applies the ship overall assembly module, which includes a deck and bulkheads. The method for leveling the ship's thin plate sub-assembly during the overall assembly stage includes the following steps: starting from the top deck and bulkheads, heating and leveling layer by layer downward; for each layer of deck, heating and leveling from the center to both sides along the width direction of the deck; for each layer of deck, heating and leveling from the overall assembly seam to the head and tail ends respectively along the length direction of the deck. After the overall assembly is completed and before hoisting, by heating and correcting the deck and bulkheads, the welding stress is released, that is, most of the residual stress is eliminated. After hoisting, deformation is not likely to occur, and the flatness of the deck and bulkheads is higher. That is to say, when the sub-assembly is hoisted, stress release caused by external forces and thus secondary deformation are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of cruise ship manufacturing, and particularly to a leveling method for a ship thin plate sub-assembly during the overall assembly stage. Background Art

[0002] At present, after the cruise ship thin plate sub-assembly is completed during the overall assembly stage, during the hoisting process, it is vulnerable to external forces, resulting in stress release and further secondary deformation. Therefore, it is necessary to appropriately eliminate part of the stress and deformation during the overall assembly stage. Summary of the Invention

[0003] The purpose of the present application is to provide a leveling method for a ship thin plate sub-assembly during the overall assembly stage, which to a certain extent solves the technical problem in the prior art that after the cruise ship thin plate sub-assembly is completed during the overall assembly stage, during the hoisting process, it is vulnerable to external forces, resulting in stress release and further secondary deformation. Therefore, it is necessary to appropriately eliminate part of the stress and deformation during the overall assembly stage.

[0004] The present application provides a leveling method for a ship thin plate sub-assembly during the overall assembly stage, which applies a ship overall assembly module. The ship overall assembly module includes a deck and a bulkhead. The leveling method for the ship thin plate sub-assembly during the overall assembly stage includes the following steps:

[0005] Start from the top deck and bulkhead and perform heating leveling layer by layer downwards;

[0006] For each deck, along the width direction of the deck, perform heating leveling from the center to both sides respectively;

[0007] For each deck, along the length direction of the deck, perform heating leveling from the overall assembly seam to the head end and the tail end respectively.

[0008] In the above technical solution, further, support members are provided between any two adjacent decks;

[0009] For each deck, perform heating leveling on the deck structure above the support member on the side of the deformed area of the deck.

[0010] In any of the above technical solutions, further, first construct according to the first set of leveling construction lines directly above the support member, and then offset a preset distance towards the deformed area and construct according to the second set of leveling construction lines.

[0011] In any of the above technical solutions, further, deformation regions are formed on the decks on the opposite two side portions of the support member. After the construction is completed according to the first set of leveling construction lines, it is offset by a preset distance towards one of the deformation regions, and the construction is carried out according to the second set of leveling construction lines, and then it is offset by a preset distance towards the other deformation region, and the construction is carried out according to the third set of leveling construction lines.

[0012] In any of the above technical solutions, further, the deformation region on one side of the support member is a convex structure, and the deformation region on the opposite side of the support member is a concave structure; or

[0013] The two deformation regions on both sides of the support member are both concave structures.

[0014] In any of the above technical solutions, further, the first set of leveling construction lines includes a plurality of first straight leveling lines, and the plurality of first straight leveling lines are sequentially arranged at intervals along the length direction of the support member;

[0015] The second set of leveling construction lines includes a plurality of second straight leveling lines, and the plurality of second straight leveling lines are sequentially arranged at intervals along the length direction of the support member, and the second straight leveling lines are arranged in a staggered manner with the first straight leveling lines;

[0016] The third set of leveling construction lines includes a plurality of third straight leveling lines, and the plurality of third straight leveling lines are sequentially arranged at intervals along the length direction of the support member, and the third straight leveling lines are arranged in a staggered manner with the first straight leveling lines and are flush with the second straight leveling lines.

[0017] In any of the above technical solutions, further, the distances between the second set of leveling construction lines, the third set of leveling construction lines and the first set of leveling construction lines are all 15 mm - 20 mm.

[0018] In any of the above technical solutions, further, the distance between any two adjacent first leveling construction lines is 70 mm - 100 mm;

[0019] The distance between any two adjacent second leveling construction lines is 70 mm - 100 mm;

[0020] The distance between any two adjacent third leveling construction lines is 70 mm - 100 mm.

[0021] In any of the above technical solutions, further, the bulkhead is provided with the support member, and the leveling construction method of the bulkhead where the deformation region is formed is the same as that of the deck.

[0022] In any of the above technical solutions, further, the heating leveling method is electromagnetic induction heating leveling and is deep penetration heating.

[0023] Compared with the prior art, the beneficial effects of this application are as follows:

[0024] The leveling method of the ship's thin-plate sub-assembly in the sub-assembly stage provided by this application is to release the welding stress by heating and straightening the deck and bulkhead after the sub-assembly is completed and before hoisting, that is, to eliminate part of the residual stress. After the ship is hoisted into the dry dock, no deformation will occur, and the flatness effect of the deck and bulkhead is good. That is to say, when the sub-assembly is hoisted, stress release caused by external forces is avoided, and thus secondary deformation is avoided. In addition, while releasing the stress, the plate members are straightened through material shrinkage, making the plate members flat and facilitating the installation of other equipment. Moreover, the input of auxiliary materials is reduced, the cost is lowered, and the ship's body weight is reduced, improving the load-bearing capacity.

[0025] Among them, starting from the top deck and bulkhead, heating and straightening are carried out layer by layer downward, that is, stress is released layer by layer from top to bottom.

[0026] Among them, for each layer of the deck, along the width direction of the deck, heating and straightening are carried out from the center to both sides respectively, and along the length direction of the deck, heating and straightening are carried out from the sub-assembly seam to the head and tail ends respectively, that is, construction is carried out in four directions of forward, backward, left, and right from the center respectively, ensuring the overall effect after straightening and avoiding the phenomenon of end warping caused by straightening from one side to the other side. Brief Description of the Drawings

[0027] In order to more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a process diagram of the leveling method of the ship's thin-plate sub-assembly in the sub-assembly stage provided by the embodiment of this application (the arrows in the figure represent the leveling direction);

[0029] Figure 2 It is another process diagram of the leveling method of the ship's thin-plate sub-assembly in the sub-assembly stage provided by the embodiment of this application (the arrows in the figure represent the leveling direction);

[0030] Figure 3 It is a schematic diagram of leveling the deck provided by the embodiment of this application;

[0031] Figure 4 It is another schematic diagram of leveling the deck provided by the embodiment of this application.

[0032] Reference Signs:

[0033] 1 - Ship assembly module, 11 - Deck, 12 - Bulkhead, 13 - Support member, 2 - Assembly seam. Detailed implementation manners

[0034] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present application.

[0035] The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0036] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] Next, refer to Figures 1 to 4 Describe the leveling method of the ship thin plate sub - section in the assembly stage according to some embodiments of the present application.

[0040] See Figure 1 and Figure 2As shown in the figure, the embodiment of the present application provides a leveling method for the thin plate general block of a ship during the general assembly stage. The ship general assembly module 1 is applied. The ship general assembly module 1 includes a deck 11 and a bulkhead 12 made of steel plates. The number of decks 11 is multiple layers, and the multiple layers of decks 11 are arranged sequentially from top to bottom along the height direction of the ship general assembly module 1. A support member 13, that is, a hard stop in the prior art, is arranged between adjacent two decks 11. A bulkhead 12 is also arranged between adjacent two decks 11, and the bulkhead 12 is also welded with a support member 13, that is, a hard stop. Among them, the hard stop is generally made of T-BEAM and section steel, which are all prior arts and will not be elaborated here one by one.

[0041] The leveling method for the thin plate general block of this ship during the general assembly stage includes the following steps:

[0042] Start from the top deck 11 and bulkhead 12, and perform heating and leveling layer by layer from top to bottom;

[0043] For each layer of deck 11, along the width direction of the deck 11, heat and level from the center to both sides respectively;

[0044] For each layer of deck 11, along the length direction of the deck 11, heat and level from the general assembly seam 2 to the head end and the tail end respectively.

[0045] Based on the steps described above, after the general assembly is completed and before hoisting, by heating and straightening the deck 11 and the bulkhead 12, the welding stress is released, that is, part of the residual stress is eliminated. After being hoisted into the dry dock, deformation will not occur, and the flatness effect of the deck 11 and the bulkhead 12 is good. That is to say, when the general block is hoisted, stress release caused by external forces is avoided, and further secondary deformation is generated. In addition, while releasing the stress, the plate parts are also leveled through material shrinkage, making the plate parts flat, facilitating the installation of other equipment, reducing the input of auxiliary materials, reducing costs, and reducing the ship's body weight and improving the bearing capacity.

[0046] Among them, starting from the top deck 11 and bulkhead 12, performing heating and leveling layer by layer from top to bottom, that is, releasing the stress layer by layer from top to bottom.

[0047] Among them, for each layer of deck 11, along the width direction of the deck 11, heat and level from the center to both sides respectively, and along the length direction of the deck 11, heat and level from the general assembly seam 2 to the head end and the tail end respectively, that is, construct in four directions of front, back, left, and right from the center respectively, ensuring the overall effect after leveling and avoiding the phenomenon of end warping caused by leveling from one side to the other side.

[0048] Furthermore, preferably, the heating and leveling method is electromagnetic induction heating and leveling, which can directly use electromagnetic induction heating equipment to heat the area to be leveled, with simple and convenient operation.

[0049] Among them, the deep penetration heating method is selected in the electromagnetic induction heating and leveling method. Deep penetration heating means that the steel plate is heated by an electromagnetic induction heating device so that the front and back surfaces of the steel plate are heated through within a specified time, and the temperature is stabilized at 700 °C. After the steel plate cools, it shrinks uniformly to achieve the purpose of leveling the steel plate. As an alternative to open-flame operation for thin plate heating and leveling, the electromagnetic induction heating and leveling method has the advantage that, compared with other leveling methods, electromagnetic induction heating can save up to 80% of the time for leveling the ship deck 1 and the vertical wall panel, that is, the bulkhead 12 described below. In addition, the electromagnetic leveling operation is simple and easy to master. After basic training for a few hours, a qualified thermal leveling operator can be trained.

[0050] In this embodiment, preferably, the specific leveling construction sequence for each layer of deck 11 is described above. Then, the process of the construction operation will be described in detail below:

[0051] Construction environment: Since the deck 11 is large, only a partial area of the deck 11 is intercepted for illustration. Deformation areas are formed on both opposite sides of the support member 13 on the deck 11, and both deformation areas are concave areas. Preferably, the maximum deformation amount is 9 mm - 12 mm.

[0052] Combined with the above construction environment, as Figure 3 shown, for each layer of deck 11, first construct according to the first set of leveling construction lines directly above the support member 13. After the construction according to the first set of leveling construction lines is completed, offset a preset distance towards one of the deformation areas, and construct according to the second set of leveling construction lines, and then offset a preset distance towards the other deformation area, and construct according to the third set of leveling construction lines, that is, construct in the order of numbers 1, 2, and 3. Note that after the construction of all the construction lines with number 1 is completed, then construct in sequence according to all the construction lines with number 2, and finally construct in sequence according to all the construction lines with number 3.

[0053] Among them, the first set of leveling construction lines includes a plurality of first straight leveling lines, and the plurality of first straight leveling lines are sequentially arranged at intervals along the length direction of the support member 13;

[0054] The second set of leveling construction lines includes a plurality of second straight leveling lines, and the plurality of second straight leveling lines are sequentially arranged at intervals along the length direction of the support member 13. The second straight leveling lines are staggered with the first straight leveling lines to ensure that the leveling lines are more evenly distributed;

[0055] The third set of leveling construction lines includes a plurality of third straight leveling lines, and the plurality of third straight leveling lines are sequentially arranged at intervals along the length direction of the support member 13. The third straight leveling lines are staggered with the first straight leveling lines and are flush with the second straight leveling lines to ensure that the leveling lines are more evenly distributed.

[0056] It can be seen that three leveling operations are carried out on the deck 11 above the support member 13, effectively releasing the welding stress and making the deck 11 flat. Since a large part of the stress has been released during the overall assembly stage, after hoisting, deformation is not likely to occur, and the flatness of the deck 11 and the bulkhead 12 is higher.

[0057] Further, preferably, the distances a between the second leveling construction line, the third leveling construction line and the first leveling construction line are all 15 mm - 20 mm;

[0058] The distance b between any two adjacent first leveling construction lines is 70 mm - 100 mm;

[0059] The distance b between any two adjacent second leveling construction lines is 70 mm - 100 mm;

[0060] The distance b between any two adjacent third leveling construction lines is 70 mm - 100 mm.

[0061] Note: Not limited to this, deformation areas are formed on the decks 11 on the opposite side parts of the support member 13, and one deformation area is a convex area, and one of the areas is a concave area. As Figure 4 shown, the same construction operations as described above are still adopted;

[0062] Or the decks on the opposite side parts of the support member 13 are convexly deformed, and the same construction operations as described above are still adopted;

[0063] Or when only the deck 11 on one side of the support member 13 is deformed convexly or concavely, it only needs to be offset by a preset distance to one side, and then leveled according to the leveling line.

[0064] Combined with the above, for the entire deck 11, it is divided into multiple areas by multiple support members 13. Each area is concave, or each area is convex, or some areas are concave, some areas are convex, and some areas are not deformed, etc., which is specifically determined according to the actual situation.

[0065] In this embodiment, preferably, the bulkhead 12 also needs to be heated and leveled. The leveling method of the bulkhead 12 is the same as that of the deck 11. Three leveling operations are carried out on the bulkhead 12 above the support member 13 to effectively release the welding stress and make the bulkhead 12 flat. For the specific details, reference can be made to the detailed scheme of leveling the deck 11 described above.

[0066] In summary, in the leveling method of the ship's thin plate sub-assembly in the sub-assembly stage provided by this embodiment, by performing three-level leveling on both the sub-assembly platform, that is, the deck 11 and the bulkhead 12, the welding stress is effectively released, and the deck 11 and the bulkhead 12 are made flat. Since the stress is released in the sub-assembly stage, no deformation will occur after the ship is lifted into the dry dock, and the flatness effect of the deck 11 and the bulkhead 12 is good.

[0067] In addition, when using the electromagnetic heating method for leveling, firstly, it does not affect the performance of the steel plate. Secondly, it solves the problems of low efficiency of flame leveling and mutual influence of cross-operation, etc. Moreover, the operation is simple, the safety is high, the efficiency is improved, and it is suitable for industrial production.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leveling method for a ship thin-plate sub-assembly during the overall assembly stage, applying a ship overall assembly module, the ship overall assembly module including a deck and a bulkhead, and a deformation area being formed on the deck and the bulkhead, Characterized in that, the leveling method for the ship thin-plate sub-assembly during the overall assembly stage includes the following steps: Starting from the top deck and bulkhead, heat leveling is carried out layer by layer downward; For each layer of the deck, along the width direction of the deck, heat leveling is carried out from the center to both sides respectively; For each layer of the deck, along the length direction of the deck, heat leveling is carried out from the overall assembly seam to the head end and the tail end respectively; Support members are arranged between any two adjacent decks; For each layer of the deck, heat leveling is carried out on the deck structure above the support member on the side of the deformation area of the deck; First, construction is carried out according to the first set of leveling construction lines directly above the support member, and then offset a preset distance towards the deformation area, and construction is carried out according to the second set of leveling construction lines; Deformation areas are formed on the decks on both opposite side parts of the support member. After the construction according to the first set of leveling construction lines is completed, offset a preset distance towards one of the deformation areas, and construction is carried out according to the second set of leveling construction lines, and then offset a preset distance towards the other deformation area, and construction is carried out according to the third set of leveling construction lines; The deformation area on one side of the support member is a convex structure, and the deformation area on the opposite side of the support member is a concave structure; or The two deformation areas on both sides of the support member are both concave structures.

2. The leveling method for the ship thin-plate sub-assembly during the overall assembly stage according to claim 1, Characterized in that, The first set of leveling construction lines includes a plurality of first straight leveling lines, and the plurality of first straight leveling lines are sequentially arranged at intervals along the length direction of the support member; The second set of leveling construction lines includes a plurality of second straight leveling lines, and the plurality of second straight leveling lines are sequentially arranged at intervals along the length direction of the support member, and the second straight leveling lines are arranged in a staggered manner with the first straight leveling lines; The third set of leveling construction lines includes a plurality of third straight leveling lines, and the plurality of third straight leveling lines are sequentially arranged at intervals along the length direction of the support member, the third straight leveling lines are arranged in a staggered manner with the first straight leveling lines, and are arranged flush with the second straight leveling lines.

3. The leveling method for the ship thin-plate sub-assembly during the overall assembly stage according to claim 1, Characterized in that, The distances between the second set of leveling construction lines, the third set of leveling construction lines and the first set of leveling construction lines are all 15 mm - 20 mm.

4. The leveling method for the ship thin-plate sub-assembly during the overall assembly stage according to claim 1, Characterized in that, The distance between any two adjacent first leveling construction lines is 70 mm - 100 mm; The distance between any two adjacent second leveling construction lines is 70 mm - 100 mm; The distance between any two adjacent third leveling construction lines is 70 mm - 100 mm.

5. The leveling method for the ship thin-plate sub-assembly during the overall assembly stage according to any one of claims 1 to 4, Characterized in that, The bulkhead is provided with the support member, and the leveling construction method of the bulkhead forming the deformation area is the same as that of the deck.

6. The leveling method of the ship thin plate sub-assembly in the overall assembly stage according to any one of claims 1 to 4, characterized in that, The heating and leveling method is electromagnetic induction heating and leveling, and is deep penetration heating.

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