Manufacturing method of ship side section

Abstract

According to the manufacturing method of the ship side segment, a longitudinal framework, a transverse frame and an inlaying plate are symmetrically welded from the middle to the two sides, welding thermal stress can be offset, overall deformation of the segment is effectively controlled, and the follow-up leveling difficulty is reduced. Local heat concentration is avoided by welding the binding bowls through the middle skip welding method, and deformation is further restrained. And the weld penetration depth is ensured through the design that the groove is formed in the inlaying plate welding area in advance, and the structural integrity of the connecting part is improved. The cross welding sequence of the longitudinal skeletons and the transverse frames enhances the overall rigidity of the sections. And the sub-decks are pre-leveled before the subsections are manufactured, so that a reference surface is provided for subsequent assembly, and accumulated errors are reduced. The sub-decks are integrally spliced after being manufactured in a modularized mode, and parallel operation can be achieved. And the final dimensional precision is ensured through secondary leveling after the deck sections are formed, and the assembly requirements of the broadside sections and other parts of the ship body are met.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method for manufacturing ship side segments. Background Art

[0002] The side sections of a vehicle transport vessel include side plating, designed to be 7-8 mm thick, with a vertical layout and integrated air ducts. The side plating features multiple openings and thickened patch panels, designed to effectively lower the vessel's center of gravity and enhance navigational stability. However, conventional techniques involve welding these thickened patch panels to the fixing plates, which can cause deformation.

[0003] During the manufacturing process of the side sections, the heat input from welding can easily cause the outer plating to deform in a wavy pattern. In particular, the four corners of the plating often warp upward, while the interior may form a wrap-like indentation. This not only requires extensive pyrotechnic correction work to restore the shape, but also significantly affects the dimensional accuracy and aesthetic appearance of the plating. Summary of the Invention

[0004] The present application provides a method for manufacturing ship side segments, which can reduce the deformation of the outer side panels and improve the dimensional accuracy of the outer side panels.

[0005] The present application provides a method for manufacturing a ship side segment, which comprises at least the following steps: leveling the sub-deck of the side outer plate for manufacturing the side segment; providing ventilation holes on part of the sub-deck; providing a groove of a preset angle on the edge of the sub-deck in the area where the patching plate needs to be welded or on one side of the patching plate; welding a longitudinal skeleton extending in the length direction of the sub-deck from the middle to both sides; welding transverse reinforcement frames in sequence from the middle to both sides; welding the patching plate to the sub-deck from the middle to both sides; welding the lashing bowl to the sub-deck by using a center-jump welding method; assembling and splicing a plurality of the sub-decks to form the side segment; and leveling the side segment.

[0006] In some optional embodiments, the step of leveling the sub-deck of the ship's side outer plate for making the ship's side segment includes placing the sub-deck on a steel plate frame; cleaning the sub-deck and the steel plate frame; and vibrating and rolling the sub-deck with a rolling rod; the flatness of the sub-deck after the vibration rolling meets ±4mm.

[0007] In some optional embodiments, an uncut straight portion is retained at the bottom of the groove, and the length of the uncut straight portion is 1 to 3 mm.

[0008] In some optional embodiments, the angle of the preset groove is 30° to 60°, and the shape of the groove is V-shaped or Y-shaped.

[0009] In some optional embodiments, the step of welding the longitudinal frames extending in the length direction of the sub-deck from the middle to both sides includes welding the longitudinal frames in the central area; and synchronously welding the longitudinal frames on both sides of the central area.

[0010] In some optional embodiments, the step of welding the patching plates to the sub-deck from the middle to both sides includes confirming the installation positions of multiple patching plates, and the installation positions of multiple patching plates are evenly arranged in the length direction of the sub-deck; welding the patching plates in the central area; alternately welding or synchronously welding the patching plates on both sides of the central area.

[0011] In some optional embodiments, the step of welding the lashing bowl to the sub-deck using the split-center jump welding method includes confirming the installation positions of multiple lashing bowls, and the installation positions of multiple lashing bowls are evenly arranged in the length direction of the sub-deck; welding the lashing bowl located in the center area; alternately welding or synchronously welding the patching plates on both sides of the center area.

[0012] In some optional embodiments, the step of assembling and splicing the plurality of sub-decks to form the side segments includes placing the plurality of sub-decks on a leveling frame; placing pads between the leveling frame and the sub-decks; positioning welding the plurality of sub-decks; welding air duct partitions on each of the sub-decks; and completely welding the plurality of sub-decks.

[0013] In some optional embodiments, the step of assembling and splicing a plurality of the sub-decks to form the side segments includes welding temporary reinforcement ribs to each of the sub-decks, the temporary reinforcement ribs being close to a side of the sub-deck air duct opening and extending in the length direction of the sub-deck; supporting a side of each of the sub-decks away from the air duct opening by a plurality of supporting components; and removing the temporary reinforcement ribs after welding a plurality of the sub-decks.

[0014] In some optional embodiments, the step of leveling the side segment includes placing support tops on the circumference and central area of ​​the side segment, wherein the support tops are used to support the side segment.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] The present application provides a method for manufacturing ship side segments, in which the longitudinal skeleton, transverse frame, and patching plate all adopt a symmetrical welding sequence of "from the middle to both sides", which can offset welding thermal stress, effectively control the overall deformation of the segment, and reduce the difficulty of subsequent leveling. The center jump welding method is used to weld the binding bowl to avoid local heat concentration and further suppress deformation. The design of pre-opening a groove in the patching plate welding area ensures the weld penetration and improves the structural integrity of the connection part. The cross-welding sequence of the longitudinal skeleton and the transverse frame enhances the overall rigidity of the segment. The sub-deck is pre-leveled before the segment is manufactured to provide a reference surface for subsequent assembly and reduce cumulative errors. After the modular production of the sub-deck, the whole is spliced ​​to achieve parallel operation. The secondary leveling after the deck segment is formed ensures the final dimensional accuracy and meets the assembly requirements of the side segment and other parts of the hull. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 A schematic flow chart of a method for manufacturing ship side segments provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a process for assembling and splicing a plurality of sub-decks to form the side sections provided in one embodiment of the present invention;

[0020] Figure 3 The temporary reinforcement and support member provided in one embodiment of the present invention is provided at the installation location on the subdeck;

[0021] Figure 4 A schematic structural diagram of a sub-deck provided in accordance with an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of a beveled joint between a patching plate and a sub-deck provided in one embodiment of the present invention;

[0023] Figure 6 for Figure 5 Schematic diagram of the blunt edge of the subdeck of the provided embodiment;

[0024] Figure 7 A schematic diagram of the reverse deformation of a side segment provided in one embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the reverse deformation of a side segment provided in another embodiment of the present invention;

[0026] Figure 9 A schematic diagram of the reverse deformation of a side segment provided in yet another embodiment of the present invention;

[0027] Figure 10A schematic diagram of the reverse deformation during the sub-deck splicing process provided by one embodiment of the present invention;

[0028] Figure 11 A schematic diagram of leveling a side section is provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0031] The side sections of a vehicle transport vessel include side plating, designed to be 7-8 mm thick, with a vertical layout and integrated air ducts. The side plating features multiple openings and thickened patch panels, designed to effectively lower the vessel's center of gravity and enhance navigational stability. However, conventional techniques involve welding these thickened patch panels to the fixing plates, which can cause deformation.

[0032] During the manufacturing process of the side sections, the heat input from welding can easily cause the outer plating to deform in a wavy pattern. In particular, the four corners of the plating often warp upward, while the interior may form a wrap-like indentation. This not only requires extensive pyrotechnic correction work to restore the shape, but also significantly affects the dimensional accuracy and aesthetic appearance of the plating.

[0033] The present application provides a method for manufacturing ship side segments, which can reduce the deformation of the outer side panels and improve the dimensional accuracy of the outer side panels.

[0034] The following is in conjunction with the drawings in the specification Figures 1 to 11 A detailed description of the method for making the ship's side sections is given.

[0035] The present application provides a method for manufacturing a ship's side segment, which comprises at least the following steps: leveling the sub-deck of the side outer plate for manufacturing the side segment; providing ventilation holes on part of the sub-deck; providing a groove of a preset angle on the edge of the sub-deck in the area where the patching plate needs to be welded or on one side of the patching plate; welding a longitudinal skeleton extending in the length direction of the sub-deck from the middle to both sides; welding transverse reinforcement frames in sequence from the middle to both sides; welding the patching plate to the sub-deck from the middle to both sides; welding the lashing bowl to the sub-deck using a center-jump welding method; assembling and splicing a plurality of the sub-decks to form the side segment; and leveling the side segment.

[0036] Specifically, the longitudinal skeleton, transverse frame, and patching plate all adopt a symmetrical welding sequence of "from the middle to both sides", which can offset welding thermal stress, effectively control the overall deformation of the segment, and reduce the difficulty of subsequent leveling. The center-skip welding method is used to weld the binding bowl to avoid local heat concentration and further suppress deformation. The design of pre-opening a groove in the patching plate welding area ensures the weld penetration and improves the structural integrity of the connection. The cross-welding sequence of the longitudinal skeleton and the transverse frame enhances the overall rigidity of the segment. The sub-deck is pre-leveled before segment production to provide a reference surface for subsequent assembly and reduce cumulative errors. After modular production, the sub-deck is spliced ​​as a whole to achieve parallel operation. Secondary leveling after the deck segment is formed ensures the final dimensional accuracy and meets the assembly requirements of the side segment and other parts of the hull.

[0037] In some optional embodiments, the step of leveling the sub-deck of the ship's side outer plate for making the ship's side segment includes placing the sub-deck on a steel plate frame; cleaning the sub-deck and the steel plate frame; and vibrating and rolling the sub-deck with a rolling rod; the flatness of the sub-deck after the vibration rolling meets ±4mm.

[0038] Specifically, the vibration rolling process combines mechanical vibration with rolling action, which can quickly eliminate local stress and deformation of the sub-deck, so that its flatness is controlled within ±4mm, meeting high-standard assembly requirements. Vibration rolling promotes the uniform release of internal stress in the material through high-frequency micro-deformation, reduces the initial residual stress of the sub-deck, and avoids greater deformation due to stress superposition during subsequent welding. Clean the steel plate cradle and the surface of the sub-deck to ensure that there is no interference from impurities, further reducing welding defects. The sub-deck is placed on a special steel plate cradle for leveling, providing uniform support to prevent secondary deformation due to its own weight or external force, and is especially suitable for large-size thin plate processing. Cleaning the cradle and sub-deck prevents foreign matter from being pressed into the surface during rolling, affecting the flatness or coating adhesion.

[0039] In some optional embodiments, an uncut straight portion is retained at the bottom of the groove, and the length of the uncut straight portion is 1 to 3 mm.

[0040] Specifically, the uncut, straight portion is called a blunt edge. This edge supports the weld pool, preventing the arc from penetrating the plate, especially thin plate, during welding, reducing the risk of burn-through and ensuring a stable weld. A blunt edge thickness of 1 to 3 mm ensures that the weld filler material penetrates the root without expanding the heat-affected zone due to excessive penetration, thus avoiding root defects such as lack of fusion and improving the fatigue strength and load-bearing capacity of the weld. Reducing the blunt edge reduces the required filler material, thereby reducing welding heat input and alleviating thermal deformation and residual stresses.

[0041] In some optional embodiments, the angle of the preset groove is 30° to 60°, and the shape of the groove is V-shaped or Y-shaped.

[0042] Specifically, the angle of the preset groove is 30° to 60°, which provides a moderate groove opening, ensuring that the welding gun or welding wire can fully reach the root, achieve full penetration welding, and avoid defects such as incomplete fusion or slag inclusion. The V-shaped groove is suitable for single-sided welding and double-sided forming, such as welding with a backing, while the Y-shaped groove can reduce the filling amount when welding thick plates, taking into account both efficiency and quality. When the angle is <30°, the angle is too small, which will cause the groove to be too narrow, easily produce slag inclusions and make operation difficult. When the angle is >60°, the angle is too large, which increases the welding material filling amount and heat input, leading to the risk of deformation. The compromise design of 30° to 60° minimizes the heat-affected zone while ensuring the depth of penetration. The geometric shape of the V or Y-shaped groove can evenly disperse the welding stress and avoid stress concentration. The combined design of the blunt edge and the groove angle further optimizes the bearing capacity of the root weld.

[0043] In some optional embodiments, the step of welding the longitudinal frames extending in the length direction of the sub-deck from the middle to both sides includes welding the longitudinal frames in the central area; and synchronously welding the longitudinal frames on both sides of the central area.

[0044] Specifically, welding the center area first establishes a stable baseline, preventing distortion or shifting of the overall structure due to asymmetric welding heat input. Simultaneous, symmetrical welding on both sides offsets thermal stresses, effectively suppressing longitudinal wave or angular deformation of the subdeck and ensuring segmental flatness. A symmetrical welding sequence evenly distributes tensile or compressive stresses generated by thermal cycling, reducing localized stress concentration and improving the overall rigidity and fatigue resistance of the segment. Prioritizing the center frame for positioning welding provides an accurate reference for subsequent assembly of the two side frames, minimizing cumulative errors.

[0045] In some optional embodiments, the step of welding the patching plates to the sub-deck from the middle to both sides includes confirming the installation positions of multiple patching plates, and the installation positions of multiple patching plates are evenly arranged in the length direction of the sub-deck; welding the patching plates in the central area; alternately welding or synchronously welding the patching plates on both sides of the central area.

[0046] Specifically, the installation positions of the plurality of patching plates are evenly arranged along the length direction of the sub-deck, further balancing the distribution of the heat-affected zone and avoiding stress concentration. The central area is welded first to establish a positioning reference to avoid cumulative deformation of the overall structure due to improper welding sequence. Alternating / synchronous welding of the patching plates on both sides makes the heat input distribution symmetrical, offsets local shrinkage stress, and significantly reduces the wave deformation or warping of the sub-deck. The symmetrical welding sequence evenly disperses the residual stress along the length direction of the sub-deck, reducing the risk of cracks at the patching plate connections. The evenly arranged patching plates act as local reinforcement nodes, which can cooperate with the longitudinal / transverse skeleton to enhance the overall rigidity of the segment.

[0047] In some optional embodiments, the step of welding the lashing bowl to the sub-deck using the split-center jump welding method includes confirming the installation positions of multiple lashing bowls, and the installation positions of multiple lashing bowls are evenly arranged in the length direction of the sub-deck; welding the lashing bowl located in the center area; alternately welding or synchronously welding the patching plates on both sides of the center area.

[0048] Specifically, intermittent skip welding significantly disperses localized heat concentrations. Combined with alternating / synchronous welding of the two binding bowls, thermal stresses are uniformly released spatially and temporally. The uniformly arranged design optimizes the load transfer path and avoids sudden localized stress changes. The symmetrical skip welding process spatially staggers the welding thermal cycle, reducing peak residual stresses. The precise positioning of the intermediate reference binding bowl provides a coordinate reference for subsequent welding, minimizing dimensional errors.

[0049] In some optional embodiments, the step of assembling and splicing the plurality of sub-decks to form the side segments includes placing the plurality of sub-decks on a leveling frame; placing pads between the leveling frame and the sub-decks; positioning welding the plurality of sub-decks; welding air duct partitions on each of the sub-decks; and completely welding the plurality of sub-decks.

[0050] Specifically, the highly rigid leveling frame provides a reference flatness, offsetting deformation caused by the subdeck's own weight. Tack welds secure key joints and limit macroscopic deformation. The duct baffles are welded to form an internal reinforcement framework. By the time the structure is fully welded, it possesses sufficient rigidity and minimizes thermal deformation. The heat conduction design of the leveling frame accelerates cooling of the weld area, reducing deformation in the heat-affected zone.

[0051] In some optional embodiments, the step of assembling and splicing a plurality of the sub-decks to form the side segments includes welding temporary reinforcement ribs to each of the sub-decks, the temporary reinforcement ribs being close to a side of the sub-deck air duct opening and extending in the length direction of the sub-deck; supporting a side of each of the sub-decks away from the air duct opening by a plurality of supporting components; and removing the temporary reinforcement ribs after welding a plurality of the sub-decks.

[0052] Specifically, temporary reinforcement ribs on the duct opening compensate for the loss of stiffness in the opening area, minimizing deformation during welding. The longitudinal arrangement of the temporary reinforcement ribs directs welding thermal stresses toward the structural strong axis. Support components absorb lateral shrinkage and deformation, preventing cumulative angular deformation.

[0053] In some optional embodiments, the step of leveling the side segment includes placing support tops on the circumference and central area of ​​the side segment, wherein the support tops are used to support the side segment.

[0054] Specifically, after the small deck is spliced, it needs to be transferred and transported to other construction sites. It should be lifted in parallel with two lifting racks. The lifting racks and the wire ropes should be kept as vertical as possible, and transported or placed with transfer brackets. Figure 7 、 Figure 8 and Figure 9 As shown in the figure, for segments of different lengths, the middle of the segment should be raised before welding, and anti-deformation should be added according to the figure. Figure 10 As shown in the figure, the small deck is assembled in sections and anti-deformation is added according to the requirements of the drawing to offset the welding deformation. Figure 11 As shown, the pyrotechnics is carried out in sections, and supports are added in the middle of each section to prevent the middle part from sinking.

[0055] In the present invention, the term "plurality" refers to at least two or more than two, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0056] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for manufacturing ship side segments, characterized in that: At least the following steps are included: Leveling the sub-deck of the side shell plating for making side sections; providing ventilation openings in part of said sub-deck; The sub-deck is provided with a groove of a preset angle at the edge of the area where the patching plate needs to be welded or on one side of the patching plate; Welding longitudinal frames extending in the length direction of the sub-deck from the middle to both sides; Weld the transverse reinforcement frames in sequence from the middle to both sides; Welding the patching plate to the sub-deck from the middle toward both sides; Welding the lashing bowl to the sub-deck using a split-center jump welding method; Assembling and splicing a plurality of the sub-decks to form the side segments; The side sections are leveled.

2. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of leveling the sub-deck of the ship's side outer plate for making the ship's side sections includes: The sub-deck is placed on a steel plate frame; the sub-deck and the steel plate frame are cleaned; the sub-deck is vibrated and rolled using a rolling stick; the flatness of the sub-deck after the vibration rolling meets the requirement of ±4mm.

3. The method for manufacturing ship side segments according to claim 1, characterized in that: An uncut straight portion is retained at the bottom of the groove, and the length of the uncut straight portion is 1 to 3 mm.

4. The method for manufacturing ship side segments according to claim 2, characterized in that: The angle of the preset groove is 30° to 60°, and the shape of the groove is V-shaped or Y-shaped.

5. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of welding the longitudinal frames extending in the length direction of the sub-deck from the middle to both sides includes welding the longitudinal frames in the central area; and synchronously welding the longitudinal frames on both sides of the central area.

6. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of welding the patching plate to the sub-deck from the middle to both sides includes: Confirm the installation positions of the plurality of patching plates, which are evenly arranged in the length direction of the sub-deck; weld the patching plates in the center area; alternately weld or synchronously weld the patching plates on both sides of the center area.

7. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of welding the lashing bowl to the sub-deck using the split-center jump welding method includes: Confirm the installation positions of the multiple lashing bowls, which are evenly arranged in the length direction of the sub-deck; weld the lashing bowls located in the central area; alternately weld or synchronously weld the patching plates on both sides of the central area.

8. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of assembling and splicing a plurality of the sub-decks to form the side sections includes: Placing the plurality of sub-decks on a leveling frame; placing a pad between the leveling frame and the sub-decks; positioning welding the plurality of sub-decks; welding an air duct partition to each of the sub-decks; and completely welding the plurality of sub-decks.

9. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of assembling and splicing a plurality of said sub-decks to form said side sections comprises: Temporary reinforcement ribs are welded to each of the sub-decks, where the temporary reinforcement ribs are close to the side of the sub-deck air duct opening and extend in the length direction of the sub-deck; a side of each sub-deck away from the air duct opening is supported by a plurality of supporting components; and the temporary reinforcement ribs are removed after welding a plurality of the sub-decks.

10. The method for manufacturing ship side segments according to claim 1, characterized in that: The step of leveling the side segment includes placing support tops on the circumference and central area of ​​the side segment, wherein the support tops are used to support the side segment.

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