A method for controlling deformation at the joint of hull sections and an auxiliary device for deformation control.

Abstract

This application relates to the field of shipbuilding technology, specifically to a method and auxiliary device for controlling deformation at the joint of hull sections. In the method for controlling deformation at the joint of hull sections, an auxiliary device is used to correct the deformation of the main deck of the hull sections in real time, ensuring that the upper surface of the main deck of the first hull section is flush with the surface of the main deck of the second hull section. Compared to the current method of reinforcing with steel plates, real-time correction of deck deformation effectively reduces the difficulty of controlling welding deformation in aluminum alloy ships and reduces the workload of post-weld deformation correction.

Description

Technical Field

[0001] This application relates to the field of shipbuilding technology, and more specifically, to a method for controlling deformation of hull section joining joints and an auxiliary device for deformation control. Background Technology

[0002] The descriptions in this section are provided only as background information in connection with this disclosure and may not constitute prior art.

[0003] Aluminum alloy ships employ a longitudinal frame structure, including decks, outer plating, sloping bottom plating, longitudinal and transverse bulkheads, and beams. Aluminum alloy ships have a high structural density and complex form. Due to the high thermal conductivity and large coefficient of thermal expansion of aluminum alloys, they are highly susceptible to oxidation in air, leading to porosity and cracking during welding. The welding deformation of aluminum alloy ships is significantly greater than that of steel ships, especially when the hull is constructed in sections. Because the intermediate areas of the pontoons lack continuous longitudinal bulkhead support, and only conventional steel plates are used for reinforcement on the deck surface, the constraint during large joint welding is insufficient, resulting in severe wave deformation and concavity after welding. This leads to significant water accumulation on the open deck, affecting ship performance. In summary, current aluminum alloy ship construction presents challenges such as difficulty in controlling welding deformation, a large workload for post-weld deformation correction, and difficulty in ensuring the required precision. Summary of the Invention

[0004] The purpose of this application is to provide a method for controlling the deformation of the hull section joining seam, which reduces the difficulty of controlling welding deformation in aluminum alloy ships and reduces the workload of post-weld deformation correction.

[0005] Another objective of this application is to provide an auxiliary device for controlling the deformation of the hull section joining joint, which helps to implement the above-mentioned control method.

[0006] Firstly, a method for controlling deformation of hull section joining joints is provided, including the following steps:

[0007] 1) Before the first hull section and the second hull section that need to be joined are joined, relevant marking lines are drawn on the slipway.

[0008] 2) Hoist the first hull section and the second hull section to the slipway, and position the first hull section and the second hull section that need to be joined so that the joining opening of the first hull section and the joining opening of the second hull section are opposite each other.

[0009] 3) Multiple deformation control auxiliary devices are installed at intervals at the joint between the first hull section and the second hull section. A portion of the upper end of the deformation control auxiliary device rests on the lower side of the main deck of the first hull section, and a portion rests on the lower side of the main deck of the second hull section; a portion of the lower end of the deformation control auxiliary device rests on the upper side of the outer bottom plate of the first hull section, and a portion rests on the upper side of the outer bottom plate of the second hull section.

[0010] 4) The deformation control auxiliary device includes a lifting mechanism for adjusting the height of the deformation control auxiliary device. By operating each deformation control auxiliary device and adjusting the height of each deformation control auxiliary device, the upper surface of the main deck of the first hull section and the main deck of the second hull section are made flat by pressing the main deck of the first hull section upwards.

[0011] 5) Weld the upper side of the main deck of the first hull section and the upper side of the main deck of the second hull section. During the welding process, observe the welding quality and deformation of the joint in real time. Adjust the height of the deformation control auxiliary device according to the actual deformation to keep the main deck surface flat. Remove the deformation control auxiliary device after welding.

[0012] In one possible implementation, step 2) includes: after positioning the first hull section and the second hull section, welding the outer bottom plate of the first hull section to the outer bottom plate of the second hull section.

[0013] In one possible implementation, step 2) further includes, after positioning the first hull section and the second hull section, performing bottom sealing welding on the lower side of the main deck of the first hull section and the lower side of the main deck of the second hull section.

[0014] In one possible implementation, the upper end of the deformation control auxiliary device is spot-welded to the main deck of the first hull section and to the main deck of the second hull section; the lower end of the deformation control auxiliary device is spot-welded to the outer bottom plate of the first hull section and to the outer bottom plate of the second hull section.

[0015] Secondly, an auxiliary device for controlling deformation of hull section joining joints is also provided, including a top seat, a base, and a lifting mechanism located between the top seat and the base. The top seat is used to press down on the main deck of the first hull section and the main deck of the second hull section that need to be joined. The base is used to press down on the outer bottom plate of the first hull section and the outer bottom plate of the second hull section. The top seat has a first hull function part for pressing down on the main deck of the first hull section and a second hull function part for pressing down on the main deck of the second hull section. The first hull function part and the second hull function part are spaced apart on the left and right, and a clearance groove is formed between them. The clearance groove is used to avoid the weld between the main deck of the first hull section and the main deck of the second hull section.

[0016] In one possible implementation, the lifting mechanism includes a top seat connecting column fixed to the top seat, a base connecting column fixed to the base, and an adjusting screw. The upper end of the adjusting screw is threadedly connected to the top seat connecting column, and the lower end is threadedly connected to the base connecting column. The thread direction of the upper end of the adjusting screw is opposite to that of the lower end.

[0017] In one possible implementation, the adjusting screw has an operating section in the middle, and the operating section has an operating hole for inserting an operating tool.

[0018] In one possible implementation, the top seat connecting column includes a top seat connecting tube and an upper bushing inserted into the top seat connecting tube. The upper bushing is fixed to the top seat connecting tube and is threadedly connected to an adjusting screw.

[0019] In one possible implementation, the top seat includes a top seat rib and a top seat block. The top seat rib is inserted into the top seat connecting column of the lifting mechanism, and the top seat block is fixed to both the top seat rib and the top seat connecting column. An clearance groove is provided on the top seat block.

[0020] In one possible implementation, the base includes a base plate, which is welded and fixed to a base connecting column, and a reinforcing rib is provided between the base connecting column and the base.

[0021] The beneficial effects of this application are as follows: In the hull section joining joint deformation control method of this application, a deformation control auxiliary device is used to correct the deformation of the main deck of the hull section in real time, so that the upper surface of the main deck of the first hull section is flat with the main deck surface of the second hull section. Compared with the current method of strengthening with steel plates, real-time correction of the deck deformation can effectively reduce the difficulty of welding deformation control in aluminum alloy ships and reduce the workload of post-weld deformation correction.

[0022] Furthermore, before placing the deformation control auxiliary device, the outer bottom plate of the first hull section is welded to the outer bottom plate of the second hull section to further improve the strength of the outer bottom plate and reduce its deformation.

[0023] Furthermore, sealing the lower side of the main deck of the first hull section with the lower side of the main deck of the second hull section by bottom welding is beneficial for the precise positioning of the main deck of the first section and the second main deck, and facilitates the installation of deformation control auxiliary devices. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the first hull section and the second hull section, showing an embodiment of the hull section joint deformation control method according to this application;

[0026] Figure 2This is a schematic diagram showing the installation state of the auxiliary device for controlling deformation of hull section joints according to an embodiment of the hull section joint deformation control method of this application (the second hull section is not shown).

[0027] Figure 3 This is a cross-sectional view of the first hull section and the second hull section when they are joined together, according to an embodiment of the hull section joint deformation control method of this application.

[0028] Figure 4 This is a schematic diagram of the auxiliary device for controlling deformation of hull section joints, as shown in an embodiment of the hull section joint deformation control method according to this application.

[0029] Figure 5 for Figure 4 Schematic diagram of the adjusting screw;

[0030] Figure 6 for Figure 4 Schematic diagram of the middle bushing;

[0031] Figure 7 for Figure 4 Top view of the base;

[0032] Figure 8 for Figure 4 Side view of the top seat block;

[0033] In the diagram: 1. Main deck; 2. Hull bottom plate; 3. Sectional joint; 4. Abutment; 5. Timber; 6. First hull section; 7. Second hull section; 8. Sectional joint; 9. Deformation control auxiliary device; 10. Adjusting screw; 101. Operating section; 102. Operating hole; 11. Top seat connecting column; 111. Top seat connecting pipe; 112. Upper bushing; 12. Base connecting column; 121. Base connecting pipe; 122. Lower bushing; 14. Base; 141. Base plate; 142. Reinforcing rib; 15. Top seat; 151. First hull functional part; 152. Second hull functional part; 153. Clearance groove; 154. Top seat rib; 155. Top seat block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] According to the first aspect of this application, a method for controlling deformation of hull section joining joints is provided, such as... Figures 1 to 8 As shown, the method in this embodiment uses an auxiliary device to control the deformation of the hull section joining seam.

[0039] In this embodiment, as Figure 1 As shown, the two hull sections that need to be joined are the first hull section 6 and the second hull section 7. The first hull section 6 is the port side pontoon section, and the second hull section 7 is the starboard side pontoon section. The first hull section 6 and the second hull section 7 are joined together port and starboard, with the joining seam extending forward and backward. Figure 1 As shown, the hull of the aluminum alloy ship is divided into sections, from top to bottom: main deck 1, hull bottom plate 2, and the section before assembly is open at the joint 3. This makes deformation control difficult and affects the control of the flatness of the main deck. At the same time, there is no continuous longitudinal bulkhead support in the midship position, resulting in large welding deformation of the aluminum alloy structure and making welding deformation and welding quality control difficult.

[0040] The structure of the deformation control auxiliary device will be introduced below.

[0041] The hull section joint deformation control auxiliary device (hereinafter referred to as deformation control auxiliary device 9) includes a top seat 15, a base 14, and a lifting mechanism located between the top seat 15 and the base 14. The top seat 15 presses against the main deck of the first hull section 6 and the main deck of the second hull section 7. The top seat 15 has a first hull function part 151 for pressing against the main deck of the first hull section 6 and a second hull function part 152 for pressing against the main deck of the second hull section 7. The first hull function part 151 and the second hull function part 152 are spaced apart to the left and right, and a clearance groove 153 is formed between them. The clearance groove 153 is used to avoid the weld between the main deck of the first hull section 6 and the main deck of the second hull section 7.

[0042] The top seat 15 includes a top seat rib 154 and a top seat block 155. The top seat rib 154 is inserted into the lifting mechanism, and the clearance groove 153 is provided on the top seat block 155.

[0043] The lifting mechanism includes a top seat connecting column 11 fixed to the top seat 15, a base connecting column 12 fixed to the base 14, and an adjusting screw 10. The upper end of the adjusting screw 10 is threadedly connected to the top seat connecting column 11, and the lower end is threadedly connected to the base connecting column 12. The thread direction at the upper end of the adjusting screw 10 is opposite to that at the lower end. By turning the adjusting screw, the top seat can move upward, thereby adjusting the height of the deformation control auxiliary device. The opposite thread direction at the upper end of the adjusting screw 10 allows for faster adjustment of the height of the deformation control auxiliary device.

[0044] A portion of the base 14 is placed on the outer bottom plate of the first hull section 6, and a portion is placed on the outer bottom plate of the second hull section 7. In this embodiment, the base plate 141 is a flat plate. After the outer bottom plates of the first hull section 6 and the second hull section 7 are welded together, the base 14 is spot-welded to both the outer bottom plates of the first hull section 6 and the second hull section 7, thus eliminating the need for clearance grooves on the base 14 to avoid weld seams.

[0045] The base 14 includes a base plate 141, which is welded and fixed to the base connecting column 12. A reinforcing rib 142 is provided between the base connecting column 12 and the base 14.

[0046] To facilitate the operation of the adjusting screw 10, the adjusting screw 10 has an operating section 101 in the middle, and the operating section 101 has an operating hole 102 for inserting an operating tool. After the operating tool is inserted into the operating hole 102, it acts as a handle to turn the adjusting screw 10.

[0047] The top seat connecting column 11 includes a top seat connecting tube 111 and an upper bushing 112 inserted into the top seat connecting tube 111. The upper bushing 112 is welded and fixed to the top seat connecting tube 111, and the upper bushing 112 is threadedly connected to the adjusting screw 10. The upper bushing 112 is separately set from the top seat connecting tube, which facilitates the machining of threads on the upper bushing 112.

[0048] Similarly, the base connecting column 12 includes a base connecting pipe 121 and a lower bushing 122. The lower bushing 122 is welded and fixed to the base connecting pipe 121, and the lower bushing 122 is threadedly connected to the adjusting screw 10. In this embodiment, the threads on the adjusting screw 10 are rectangular threads.

[0049] In this embodiment, the top of the top seat connecting pipe 111 is provided with a slot extending vertically. The top seat rib 154 is inserted into the slot from top to bottom and welded to the top seat connecting pipe 111. The top of the top seat rib 154 is flush with the top end face of the top seat connecting pipe 111. The top seat block 155 is welded to both the top seat rib 154 and the top seat connecting pipe 111, thereby improving the connection strength.

[0050] The following is a detailed description of a method for controlling deformation at the joint of ship hull sections, including the following steps:

[0051] 1) Before the first hull section 6 and the second hull section 7 that need to be joined are joined, relevant marking lines are drawn on the slipway.

[0052] Specifically, before the hull sections are assembled, relevant marking lines on the slipway are drawn at designated locations using a laser theodolite to establish the section docking reference, such as... Figure 2 As shown, iron supports 4 and timbers 5 are arranged. The location and quantity of these supports are designed in conjunction with the weight center of gravity of the pontoon to ensure safe placement and control placement deformation. The supports and timbers are arranged symmetrically along the width direction to control the placement deformation of the pontoon sections.

[0053] 2) Hoist the first hull section 6 and the second hull section 7 to the slipway, and position the first hull section 6 and the second hull section 7 that need to be joined so that the joining opening of the first hull section 6 and the joining opening of the second hull section 7 are aligned left and right.

[0054] Specifically, the first hull section 6 is hoisted onto the slipway for positioning. The baseline markings on the first hull section 6 correspond one-to-one with the baselines on the slipway to ensure positioning accuracy. The second hull section 7 is then hoisted onto the slipway for positioning, marking, and cutting of allowances to ensure the main dimensions of the assembled section.

[0055] After the first hull section 6 and the second hull section 7 are positioned, the hull bottom plate of the first hull section 6 is welded to the hull bottom plate of the second hull section 7. The lower side of the main deck of the first hull section 6 is then sealed with a bottom weld to the lower side of the main deck of the second hull section 7. The welding of the hull bottom plate and the sealing welding of the main deck are independent and can be carried out simultaneously. After welding, the hull bottom plate has increased strength and is less prone to deformation under the action of the deformation control auxiliary device.

[0056] 3) Multiple deformation control auxiliary devices are installed at intervals at the joint between the first hull section 6 and the second hull section 7. A portion of the upper end of the deformation control auxiliary device rests on the lower side of the main deck of the first hull section 6, and a portion rests on the lower side of the main deck of the second hull section 7; a portion of the lower end of the deformation control auxiliary device rests on the upper side of the outer bottom plate of the bottom of the first hull section 6, and a portion rests on the upper side of the outer bottom plate of the bottom of the second hull section 7.

[0057] Specifically, the deformation control auxiliary device 9 is arranged below the segmented closure joint 8, and the number of devices is evenly distributed along the closure joint direction according to the structural form. The base 1414 rests on the upper surface of the hull bottom plate.

[0058] The upper clearance groove 153 of the deformation control auxiliary device is aligned with the joint between the main deck of the first hull section 6 and the main deck of the second hull section 7 to facilitate welding.

[0059] 4) The deformation control auxiliary device includes a lifting mechanism for adjusting the height of the deformation control auxiliary device. By operating each deformation control auxiliary device and adjusting the height of each deformation control auxiliary device, the upper surface of the main deck of the first hull section 6 and the main deck of the second hull section 7 are made to be flat with the surface of the main deck of the second hull section 7 by pressing the main deck of the first hull section 6 upward.

[0060] Specifically, the height of the deformation control auxiliary device is adjusted by rotating the adjusting screw 10. Both ends of the deformation control auxiliary device are respectively tightened against the main deck and the hull bottom plate. Then, the upper end of the deformation control auxiliary device is spot-welded to the main deck of the first hull section 6 and to the main deck of the second hull section 7. The height of the deformation control auxiliary device is adjusted to make the main deck level.

[0061] It should be noted that the overall strength of the hull bottom plate is greater than that of the main deck, and the hull bottom plate is supported by piers, making it less prone to deformation. Furthermore, the precision requirements for the hull bottom plate are less stringent than those for the main deck during shipbuilding.

[0062] 5) Weld the upper side of the main deck of the first hull section 6 and the upper side of the main deck of the second hull section 7. During the welding process, observe the welding quality and deformation of the joint in real time. Adjust the height of the deformation control auxiliary device according to the actual deformation to keep the main deck surface flat. Remove the deformation control auxiliary device after welding.

[0063] Specifically, welding is performed at the joints of the hull sections, and the control fixtures are removed after welding. The height of the deformation control auxiliary device is lowered by rotating the adjusting screw 10. When removing the deformation control auxiliary device, the weld quality and sagging deformation are checked. The fixtures are removed after the hull sections are safely joined and the deformation is under control.

[0064] In summary, after the hull sections are hoisted onto the slipway, the deformation control auxiliary device of this application is positioned and lifted into place to control the joining elements of the closure joint, allowing the hull sections to be welded together. The deformation control auxiliary device supports the main deck and outer bottom plate during hull section closure, reducing the impact of welding stress on the closure area, preventing concavity in the closure weld, improving closure joint accuracy and weld quality, controlling deformation at the pontoon section closure joint, and ensuring the flatness of the main deck. This solves the technical difficulties of controlling deformation during pontoon section installation and aluminum alloy welding deformation, reduces the impact of welding stress on the closure area, prevents concavity in the closure weld, improves closure joint accuracy and weld quality, reduces post-weld heat treatment work, and enables rapid pontoon section closure.

[0065] In this embodiment, the base 14 and top seat 15 of the deformation control auxiliary device are made of the same aluminum alloy as the hull, avoiding contact between dissimilar metals and corrosion of the main hull; (2) the deformation control auxiliary device is lightweight, can be carried and deployed by a single person in a limited construction space, and is easy to disassemble; (3) the height can be adjusted by adjusting the screw 10, making the operation flexible and allowing for timely adjustment based on the deformation during the welding process. It can be seen that the hull section assembly described in this application uses the deformation control auxiliary device for assembly, which improves the construction processability and safety, controls the mounting accuracy and welding quality of the butt joint, and improves the water accumulation problem during the use of the hull.

[0066] In one embodiment, the welding of the outer bottom plate of the first section and the outer bottom plate of the second section is carried out after the main deck is welded.

[0067] In one embodiment, the upper side of the main deck is welded first, and then the lower side of the main deck of the first hull section and the lower side of the main deck of the second hull section are sealed by bottom welding.

[0068] In one embodiment, the deformation control auxiliary device, in addition to adopting the form described in the above embodiments, uses a jack of suitable specifications from the prior art.

[0069] In one embodiment, the two ends of the deformation control auxiliary device are not fixed; the upper end is press-fitted with the main deck, and the lower end is press-fitted with the hull bottom plate, facilitating disassembly. In another embodiment, bolt fixing is used instead of spot welding.

[0070] In one embodiment, the lifting mechanism is a hydraulic lifting mechanism. In another embodiment, the lifting mechanism is equipped with a motor, which is connected to a lead screw and nut mechanism to press against the main deck.

[0071] This application presents a specific embodiment of the auxiliary device for controlling deformation of hull section closure joints. The structure of the auxiliary device for controlling deformation of hull section closure joints in this embodiment is the same as that of the deformation control auxiliary device described in any of the above embodiments, and will not be repeated here.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for controlling deformation of hull section joining joints, characterized in that, Includes the following steps: 1) Before the first hull section (6) and the second hull section (7) that need to be joined are joined, relevant marking lines are drawn on the slipway; 2) Hoist the first hull section (6) and the second hull section (7) to the slipway, and position the first hull section (6) and the second hull section (7) that need to be joined together so that the joining opening of the first hull section (6) and the joining opening of the second hull section (7) are opposite each other. After the first hull section (6) and the second hull section (7) are positioned, weld the outer bottom plate of the first hull section (6) to the outer bottom plate of the second hull section (7). 3) Multiple deformation control auxiliary devices (9) are set at intervals at the joint between the first hull section (6) and the second hull section (7). A part of the upper end of the deformation control auxiliary device (9) rests on the lower side of the main deck of the first hull section (6), and a part rests on the lower side of the main deck of the second hull section (7); a part of the lower end of the deformation control auxiliary device (9) rests on the upper side of the outer bottom plate of the first hull section (6), and a part rests on the upper side of the outer bottom plate of the second hull section (7). 4) The deformation control auxiliary device (9) includes a lifting mechanism for adjusting the height of the deformation control auxiliary device (9). By operating each deformation control auxiliary device (9) and adjusting the height of each deformation control auxiliary device (9), the upper surface of the main deck of the first hull section (6) and the main deck of the second hull section (7) are made to be flat with the surface of the main deck of the second hull section (7) by pressing the main deck of the first hull section (6) and the main deck of the second hull section (7) upward. 5) Weld the upper side of the main deck of the first hull section (6) and the upper side of the main deck of the second hull section (7). During the welding process, observe the welding quality and deformation of the joint in real time. Adjust the height of the deformation control auxiliary device (9) according to the actual deformation amount to keep the main deck surface flat. Remove the deformation control auxiliary device (9) after welding.

2. The method for controlling deformation of hull section joining joints according to claim 1, characterized in that, Step 2) also includes, after positioning the first hull section (6) and the second hull section (7), sealing the bottom of the main deck of the first hull section (6) and the main deck of the second hull section (7) with a bottom weld.

3. The method for controlling deformation of hull section joining joints according to claim 1 or 2, characterized in that, The upper end of the deformation control auxiliary device (9) is spot welded to the main deck of the first hull section (6) and to the main deck of the second hull section (7); the lower end of the deformation control auxiliary device (9) is spot welded to the outer bottom plate of the first hull section (6) and to the outer bottom plate of the second hull section (7).

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