Lossless leveling tool and leveling method for ship closure slab joints

Abstract

The invention discloses a lossless leveling tool and a lossless leveling method for ship closure plate joints, and relates to the technical field of ship closure plate joints. The lossless leveling tool and the lossless leveling method for the ship closure plate joints comprise a base; the inserting plate assembly is fixedly arranged on the base and used for being inserted into a to-be-adjusted plate seam; the locking assembly is arranged on the base and is used for locking the base on a mounting surface of a slab joint to be adjusted; and the adjusting assembly is arranged on the base and is used for adjusting the adjusting surface of the slab seam to be adjusted. Through the mechanical operation mode of inserting and positioning of the inserting plate assembly, locking and fixing of the locking assembly and matched leveling of the adjusting assembly, the tedious step of welding and stacking plates twice in the traditional technology is replaced, multiple treatment procedures such as subsequent cutting, polishing and paint repairing are omitted, plate seam leveling can be completed only through simple operation such as inserting, screwing and jacking in the whole process, and the production efficiency is improved. The operation process is simple, the leveling process is rapid and efficient, and the overall construction period of ship closure plate joint leveling is greatly shortened.

Description

Technical Field

[0001] This application relates to the field of ship closure plate joint technology, and more specifically, to a non-destructive leveling tooling for ship closure plate joints. Background Technology

[0002] Shipbuilding falls under the category of large-scale steel structure equipment manufacturing. The hull is constructed by splicing and welding multiple steel plates. Due to objective limitations in processing equipment capacity, transportation conditions, and overall forming processes, ships cannot be manufactured entirely as a single unit. The industry generally adopts a core process model of segmented prefabrication and on-site assembly. The key process in the ship assembly stage is the butt joint assembly of steel plates. The splicing gaps formed during the assembly of multiple prefabricated steel plates are the ship hull seams. The assembly accuracy of these seams directly determines the overall assembly quality of the hull steel structure and is a core aspect of controlling the hull forming effect during shipbuilding.

[0003] During the butt welding of steel plates at the joint of a ship, various factors such as the accuracy of hoisting and positioning, the elastic deformation of the plates themselves, and the on-site construction environment can cause misalignment of the steel plates on both sides of the joint. This phenomenon is known in the industry as plate joint misalignment. If misalignment exists and is not accurately leveled, subsequent main weld operations will suffer from defects such as poor weld formation, uneven weld thickness, and insufficient penetration due to the unevenness of the steel plate butt joint surfaces. This will not only reduce the weld strength and the sealing performance of the hull, but also lead to localized stress concentration hazards in the hull steel structure, seriously affecting the ship's navigation safety, structural durability, and service life. Therefore, leveling the joint of the ship's plates is an essential preliminary process before butt welding and is of great significance to ensuring the overall manufacturing quality of the ship.

[0004] Currently, in the shipbuilding industry, the traditional process of welding clamps is commonly used for leveling the seams of welded plates. This process achieves leveling and fixation by temporarily welding clamps onto the base material of the seam. The specific operation procedure is as follows: First, an L-shaped adjusting clamp is welded to the base material on one side of the seam. Using this adjusting clamp as the force fulcrum for hydraulic pressure, a hydraulic pump applies pressure to the other side of the seam to flatten the misaligned seam. After leveling the seam, an H-shaped fixing clamp is welded to the seam to lock the leveled position and prevent the steel plate from deforming again due to elastic rebound during subsequent welding. After the main weld of the seam is completed, the adjusting and fixing clamps welded to the base material need to be flame-cut. The surface of the cut base material is then ground and leveled, and any damaged paint is repaired. However, this traditional leveling process has many obvious drawbacks and is no longer suitable for the efficient and green development needs of the modern shipbuilding industry: First, the leveling process requires welding different types of mounting plates twice, and subsequent processing steps such as cutting, grinding, and repainting are required. The process is cumbersome and each step needs to be done alternately, resulting in low leveling efficiency and significantly extending the overall construction cycle of ship assembly. Second, the high temperature of mounting plate welding directly damages the protective paint layer on the surface of the base material, and cutting and grinding operations also cause physical damage to the base material itself. Even if repainting is done later, it is difficult to fully restore the original protective performance and surface smoothness of the base material, which can easily lead to a decrease in the local anti-corrosion ability of the base material. Third, the welding fumes generated by welding mounting plates, the metal dust generated by cutting operations, and the fine particulate dust generated by grinding operations will cause serious pollution to the working environment. At the same time, the high-intensity noise generated during welding, cutting, and grinding will also endanger the occupational health of workers, which does not meet the industry development requirements of green shipbuilding.

[0005] Therefore, it is necessary for the inventors to design a new non-destructive leveling tool for ship closure plate joints to overcome the problems of long construction period, environmental pollution and easy damage to the surface of the base material in the above-mentioned technologies. Summary of the Invention

[0006] The main purpose of this application is to provide a non-destructive leveling tool for assembling seams in shipbuilding, in order to solve the problems of difficulty in assembling seams, low efficiency, environmental pollution, and damage to the seam surface during shipbuilding.

[0007] To achieve the above objectives, this application provides a non-destructive leveling fixture for the seams of ship closure plates, comprising: The base serves as the main support structure for the tooling. The insert plate assembly is fixed on the base and is used to insert into the gap to be adjusted to achieve precise positioning of the tooling and the gap. A locking component, provided on the base, is used to lock the base onto the mounting surface of the plate seam to be adjusted, preventing tooling displacement; An adjustment component is provided on the base and located above the adjustment surface of the gap to be adjusted. It is used to adjust and lock the adjustment surface to keep the gap level. The top pressure component is placed between the base and the adjustment surface of the plate gap to be adjusted, and is used to provide top pressure to eliminate the height difference on both sides of the plate gap.

[0008] Optionally, the insert plate assembly includes a strip-shaped insert plate, a through hole, and a movable pin. The strip-shaped insert plate extends vertically downward and is fixed to the base. The through hole is opened on the strip-shaped insert plate. The movable pin is inserted into the through hole, and a limiting block is provided at the end of the movable pin facing the locking component.

[0009] Optionally, both the through hole and the movable pin are rectangular in shape, a mounting plate is vertically provided on the base, and fastening bolts are provided on the mounting plate. The strip-shaped insert is detachably and fixedly connected to the mounting plate by the fastening bolts.

[0010] Optionally, the locking assembly includes a first threaded sleeve and a first screw rod, the first threaded sleeve being fixed to the base and conforming to the mounting surface of the plate gap to be adjusted, and the first screw rod being threadedly connected to the first threaded sleeve; the adjusting assembly includes a second threaded sleeve and a second screw rod, the second threaded sleeve being fixed to the base and located above the adjusting surface of the plate gap to be adjusted, and the second screw rod being threadedly connected to the second threaded sleeve.

[0011] Optionally, both the first and second screws are provided with an adjustment head at their top ends. The adjustment head is a hexagonal structure or a structure with a circular knob. The first and second screws are two screws of different lengths, symmetrically distributed on both sides of the base. The bottoms of the first and second screws are designed for automatic alignment.

[0012] Optionally, the base is an L-shaped structure made of high-strength cast steel, and the surface of the base is coated with protective coating; the top pressure component is a hydraulic jack, and the center of the hydraulic jack is aligned with the force center of the adjustment surface of the plate gap to be adjusted.

[0013] A leveling method for a non-destructive leveling fixture for ship closure plate seams includes the following steps: S1. Insertion and positioning: Insert the strip plate on the base into the gap of the plate to be adjusted, loosen the first screw and the second screw, so that the strip plate is fully attached to the gap, and determine that the plate gap surface corresponding to the first screw is the mounting surface and the plate gap surface corresponding to the second screw is the adjustment surface. S2, snap-fit ​​fixing: Insert the movable pin into the through hole on the strip plate from the back of the plate seam, and limit the movable pin by the limiting block so that the plate assembly is snapped into one side of the plate seam, thus completing the positioning connection between the tooling and the plate seam. S3. Locking the base: Rotate the adjusting head of the first screw to make the first screw screw turn downward and fit tightly against the mounting surface, locking the base and the mounting surface into one piece; S4. Top pressure leveling: Place the depressurized top pressure component between the base and the adjustment surface and ensure centering. Operate the top pressure component to perform the lifting operation until the mounting surface and adjustment surface on both sides of the plate joint are on the same horizontal plane. Adjust the top pressure component to the pressure holding state. S5. Locking and Leveling State: Rotate the adjusting head of the second screw to make the second screw turn downwards and fit tightly against the adjusting surface, thus locking the adjusting surface and achieving plate seam leveling. After leveling, remove the top pressure component, and the plate seam welding operation can be carried out. Optionally, in step S1, a suitable strip plate can be replaced by loosening the fastening bolts, depending on the gap width of the plate seam to be adjusted and the plate thickness.

[0014] Optionally, in step S3, the first screw is driven to advance by using a wrench or manually turning the adjusting head to achieve stepless locking of the mounting surface, adapting to mounting surfaces with different flatness.

[0015] Optionally, in step S5, after both the first screw and the second screw are locked, the elastic rebound of the steel plates on both sides of the plate joint is limited by the automatic alignment design of their bottoms, so as to maintain the leveling accuracy of the plate joint.

[0016] This invention provides a non-destructive leveling fixture for ship closure plate joints. Compared with existing technologies, its advantages are as follows: The mechanical operation method of inserting and positioning the plate assembly, locking and fixing the locking assembly, and adjusting the assembly for leveling replaces the cumbersome steps of two welding plates in traditional processes. It also eliminates subsequent cutting, grinding, and painting processes. The entire process only requires simple operations such as insertion, screwing, and lifting to complete the plate joint leveling. The operation process is simple, and the leveling process is fast and efficient, significantly shortening the overall construction cycle of ship closure plate joint leveling. The entire leveling process does not require welding any plates to the surface of the base material, nor does it involve cutting or grinding. This method of physically damaging the material completely avoids the damage to the paint surface of the base material caused by high-temperature welding in traditional processes, as well as the damage to the base material itself caused by cutting and grinding operations. It effectively ensures the integrity and original performance of the base material and its surface paint. The leveling operation of this tooling completely eliminates welding, cutting, grinding and other processes, and will not produce welding fumes, metal dust, fine particulate dust and other substances that pollute the environment. It also avoids the high-intensity noise generated by the above processes. It effectively protects the on-site working environment and eliminates the occupational health hazards of pollutants and noise to workers, which is in line with the green and environmentally friendly development requirements of the modern shipbuilding industry. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a front view diagram of the structure of this practical book.

[0018] The components are: 1. base; 2. strip-shaped insert plate; 3. first threaded sleeve; 4. first screw rod; 5. second threaded sleeve; 6. second screw rod; 7. jack; 8. movable pin; 9. mounting plate; 10. fastening bolt. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] In addition, the term "multiple" should mean two or more.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1, as Figures 1-2 As shown, this embodiment provides a non-destructive leveling tool for ship closure plate joints, including a base 1; an insert plate assembly fixed on the base 1 for insertion into the plate joint to be adjusted; a locking assembly on the base 1 for locking the base 1 onto the mounting surface of the plate joint to be adjusted; and an adjustment assembly on the base 1 for adjusting the adjustment surface of the plate joint to be adjusted.

[0026] The base 1 is the main support structure of the entire tooling. It is made of high-strength cast steel, which provides sufficient stability and load-bearing capacity to meet the stress requirements during plate joint leveling. The base 1 is L-shaped and its surface is coated with a protective layer, effectively improving its corrosion resistance and extending the overall service life of the tooling. A mounting plate 9 is vertically mounted on the base 1, and fastening bolts 10 are fitted onto the mounting plate 9. These bolts connect the strip-shaped insert plates 2 of the insert plate assembly. By tightening or loosening the bolts 10, the strip-shaped insert plates 2 can be detachably fixed to the mounting plate 9. This not only ensures the secure connection between the strip-shaped insert plates 2 and the base 1 but also facilitates the replacement, maintenance, and adjustment of the strip-shaped insert plates 2. Appropriate strip-shaped insert plates 2 can be replaced according to different plate joint widths and plate thicknesses, further enhancing the tooling's versatility.

[0027] The insert plate assembly is used to insert into the gap to be adjusted and is the core component for precise positioning of the tooling and the gap. It includes a strip-shaped insert plate 2, a through hole, and a movable pin 8. The strip-shaped insert plate 2 extends vertically downward and is connected to the base 1 via a mounting plate 9 and fastening bolts 10. The size of the strip-shaped insert plate 2 is adapted to the gap width of the ship's closing gap and can be directly inserted into the gap to be adjusted, providing a stable lower support point for subsequent locking and leveling of the tooling. The strip-shaped insert plate 2 has a through hole, and the movable pin 8 is inserted into the through hole. Both the through hole and the movable pin 8 are rectangular in shape. The rectangular structure effectively prevents the movable pin 8 from rotating within the through hole, avoiding displacement or loosening of the movable pin 8 during the leveling operation, and improving the stability of the insertion plate assembly's engagement with the gap. The end of the movable pin 8 facing the locking component has a protruding limiting block. The limiting block provides a limiting function for the movable pin 8. After the movable pin 8 is inserted into the through hole, the limiting block can fit against the outer wall of the strip-shaped insert plate 2, preventing the movable pin 8 from completely slipping out of the through hole. This ensures that the movable pin 8 can be stably locked in the through hole, thereby making the insert plate assembly firmly locked on one side of the plate seam. Together with the screw structure at the top of the base 1, it generates a high-strength fastening force, laying the foundation for subsequent locking and leveling operations. The insert plate assembly achieves connection with the plate seam by inserting the strip-shaped insert plate 2 and engaging the movable pin 8, without the need for any welding operations on the base material, fundamentally avoiding damage to the base material and paint surface caused by welding.

[0028] A locking assembly is mounted on the base 1 to lock the base 1 onto the mounting surface of the plate joint to be adjusted. It includes a first threaded sleeve 3 and a first screw 4. The first threaded sleeve 3 is fixed to the base 1 and conforms to the mounting surface of the plate joint to be adjusted. The first screw 4 and the first threaded sleeve 3 are threaded together, and the extension length of the first screw 4 can be changed by the screwing action. An adjusting head is provided at the top of the first screw 4. The adjusting head has a hexagonal structure and can be directly tightened or loosened with a wrench. Alternatively, the adjusting head can be configured with a circular knob to accommodate manual tightening. Both operating methods can be flexibly selected according to the on-site construction environment, improving operational convenience. In actual operation, the first screw 4 is driven to screw in or out of the first screw sleeve 3 by rotating the adjusting head, so that the bottom end of the first screw 4 is tightly attached to the mounting surface of the plate seam to be adjusted, thereby firmly locking the base 1 and the mounting surface of the plate seam into a whole, avoiding the shaking or displacement of the base 1 during the leveling process, ensuring the overall stability of the tooling, and providing a precise positioning basis for subsequent plate seam leveling operations. The thread adjustment method of the locking component can realize stepless locking of the mounting surface, adapt to mounting surfaces with different flatness, and improve the fitting of the locking.

[0029] The adjustment assembly is also mounted on the base 1 and is used to adjust and lock the adjustment surface of the plate gap to be adjusted. It includes a second screw sleeve 5 and a second screw 6. The second screw sleeve 5 is fixed on the base 1 and located directly above the adjustment surface of the plate gap to be adjusted. The second screw 6 and the second screw sleeve 5 are connected by a thread. Its adjustment principle is the same as that of the first screw 4. By rotating the adjustment head, the extension length of the second screw 6 is changed to achieve the pressing and locking of the adjustment surface. The top of the second screw 6 is also equipped with an adjustment head with the same structure as the first screw 4, which can accommodate both wrench operation and manual tightening, ensuring consistency and convenience of operation. At the same time, the first screw 4 and the second screw 6 adopt a design with two screws of different lengths, symmetrically distributed on both sides of the base 1. Their bottoms are designed for automatic alignment. When both screws are in the locked state, the mounting surface and the adjustment surface on both sides of the plate gap can be on the same horizontal plane, ensuring the leveling accuracy of the plate gap. The adjustment component, as a shaping structure after the plate seam is leveled, can replace the fixed plate in the traditional process. It maintains the leveling state of the plate seam through mechanical locking, avoiding misalignment of the steel plate due to elastic rebound. After locking, the tooling can be directly removed without subsequent cutting, grinding and other processing steps.

[0030] Jack 7, placed between base 1 and the adjustment surface of the plate joint to be adjusted, is the core component for leveling the plate joint. Jack 7 adopts a hydraulic structure, and its jacking pressure is stable and controllable, easily eliminating the height difference on both sides of the plate joint, making the leveling process more labor-saving and efficient. Jack 7 needs to be placed between base 1 and adjustment surface in the depressurized state. When placing it, ensure that the center of jack 7 is aligned with the force center of the adjustment surface to avoid uneven loading during the jacking process, which could cause secondary deformation of the plate joint and affect the leveling accuracy. After jacking with jack 7, tighten the second screw 6, thereby reducing the force required to tighten the second screw 6 and improving efficiency.

[0031] A leveling method for a non-destructive leveling fixture for ship closure plate seams includes the following steps: S1. Insertion and Positioning: Based on the gap width and plate thickness of the plate joint to be adjusted, loosen the fastening bolts 10 on the mounting plate 9, replace with the appropriate strip-shaped insert plate 2 and re-tighten; slowly insert the strip-shaped insert plate 2 on the base 1 into the plate joint to be adjusted, while simultaneously loosening the first screw 4 and the second screw 6 upwards, so that the strip-shaped insert plate 2 fully fits against the inner wall of the plate joint, ensuring that the tooling is placed stably. At this time, the plate joint surface corresponding to the first screw 4 is determined as the mounting surface, and the plate joint surface corresponding to the second screw 6 is the adjustment surface.

[0032] S2. Snap-fit ​​fixing: Insert the rectangular movable pin 8 into the rectangular through hole at the bottom of the strip plate 2 from the back of the plate seam. The rectangular structure prevents the movable pin 8 from rotating in the hole. At the same time, the limiting block at the end of the movable pin 8 fits against the outer wall of the strip plate 2 to prevent the movable pin 8 from slipping out. This makes the plate assembly firmly snap-fitted to one side of the plate seam, completing the positioning connection between the tooling and the plate seam.

[0033] S3. Locking the base: Depending on the on-site construction conditions, use a wrench or manual screwing to turn the adjusting head at the top of the first screw 4, driving the first screw 4 to screw downwards into the first screw sleeve 3 until the bottom end of the first screw 4 is tightly attached to the mounting surface, firmly locking the base 1 and the mounting surface of the plate seam into a whole, preventing the tooling from shaking or shifting during the subsequent leveling process.

[0034] S4. Top Pressure Leveling: Place the depressurized hydraulic jack 7 stably between the adjustment surface and the top support beam of the base 1. After confirming that the center of the hydraulic jack 7 is aligned with the force center of the adjustment surface, operate the hydraulic jack 7 to perform the jacking operation. Gradually eliminate the height difference on both sides of the plate joint through stable jacking pressure. When it is observed that the mounting surface and adjustment surface on both sides of the plate joint are on the same horizontal plane and there is no obvious height difference, adjust the hydraulic jack 7 to the pressure holding state to maintain stable jacking pressure.

[0035] S5, Locking Leveling State: Rotate the adjusting head at the top of the second screw 6 to drive the second screw 6 to screw downwards inside the second screw sleeve 5 until the bottom end of the second screw 6 is tightly against the adjusting surface; at this time, both the first screw 4 and the second screw 6 are in a locked state. With the help of the automatic alignment design at the bottom of the two, the plate seam will remain in a leveled state and the elastic rebound of the steel plate can be limited; after leveling is completed, remove the hydraulic jack 7, and the main weld seam of the plate seam can be directly welded. After welding is completed, loosen the first screw 4 and the second screw 6, pull out the strip insert 2 from the plate seam, and complete the tooling removal.

[0036] This tooling, through the coordinated operation of the base 1, insert plate assembly, locking assembly, adjusting assembly, and jack 7, achieves non-destructive leveling of the seams of ship closure plates. The strip-shaped insert plate 2 and movable pin 8 fixing method of the insert plate assembly are flexible and simple to operate, and can be adapted to leveling operations of various plate thicknesses according to actual construction needs, greatly improving the versatility of the tooling. The screw adjustment structure of the locking assembly and adjusting assembly balances the convenience of operation and the accuracy of leveling, requiring no professional operating skills, and can be completed by ordinary construction personnel. The integrated use of jack 7 makes the force application process easier, faster and more efficient, and compared with the traditional hydraulic pump pressing method, the force is more even and the leveling accuracy is higher. The entire leveling process requires no welding of mounting plates to the base material, eliminating subsequent cutting, grinding, and repainting steps. This completely avoids damage to the base material's paint caused by high welding temperatures and physical damage to the base material itself caused by cutting and grinding. It effectively ensures the integrity and original performance of the base material and its surface paint. Furthermore, the entire process generates no welding fumes, metal dust, fine particulate dust, or other pollutants, and there is no high-intensity operational noise. This protects the on-site construction environment and safeguards the occupational health of workers, aligning with the green, environmentally friendly, and efficient development requirements of the modern shipbuilding industry. In addition, this tooling is a fully mechanical structure, and all components are reusable, significantly reducing the construction cost of plate joint leveling. The process is also greatly simplified compared to traditional methods, effectively shortening the construction cycle for leveling plate joints during ship assembly and improving overall construction efficiency.

[0037] 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 non-destructive leveling tooling for seams in ship closure plates, characterized in that, include: Base (1); The insert plate assembly is fixed on the base (1) and is used to insert into the gap of the plate to be adjusted to achieve precise positioning of the tooling and the gap; A locking component is provided on the base (1) to lock the base (1) on the mounting surface of the plate seam to be adjusted, so as to prevent the tooling from shifting. An adjustment component is provided on the base (1) and located above the adjustment surface of the plate joint to be adjusted. It is used to adjust and lock the adjustment surface to keep the plate joint in a level state. The top pressure component is placed between the base (1) and the adjustment surface of the plate gap to be adjusted, and is used to provide top pressure to eliminate the height difference on both sides of the plate gap.

2. The non-destructive leveling fixture for ship closure plate seams according to claim 1, characterized in that, The insert plate assembly includes a strip insert plate (2), a through hole and a movable pin (8). The strip insert plate (2) extends vertically downward and is fixed to the base (1). The through hole is opened on the strip insert plate (2). The movable pin (8) is inserted into the through hole, and a limiting block is provided at one end of the movable pin (8) facing the locking component.

3. The non-destructive leveling fixture for ship closure plate seams according to claim 2, characterized in that, The through hole and the movable pin (8) are both rectangular in shape. The base (1) is vertically provided with a mounting plate (9). The mounting plate (9) is provided with fastening bolts (10). The strip-shaped insert (2) is detachably and fixedly connected to the mounting plate (9) by the fastening bolts (10).

4. The non-destructive leveling fixture for ship closure plate seams according to claim 1, characterized in that, The locking assembly includes a first screw sleeve (3) and a first screw rod (4). The first screw sleeve (3) is fixed to the base (1) and fits the mounting surface of the plate gap to be adjusted. The first screw rod (4) is threadedly connected to the first screw sleeve (3). The adjusting assembly includes a second screw sleeve (5) and a second screw rod (6). The second screw sleeve (5) is fixed to the base (1) and located above the adjusting surface of the plate gap to be adjusted. The second screw rod (6) is threadedly connected to the second screw sleeve (5).

5. The non-destructive leveling fixture for ship closure plate seams according to claim 4, characterized in that, The first screw (4) and the second screw (6) are each provided with an adjustment head at their top ends. The adjustment head is a hexagonal structure or a structure with a circular knob. The first screw (4) and the second screw (6) are two screws of different lengths and are symmetrically distributed on both sides of the base (1). The bottom of the first screw (4) and the second screw (6) is designed for automatic alignment.

6. The non-destructive leveling fixture for ship closure plate seams according to claim 1, characterized in that, The base (1) is an L-shaped structure made of high-strength cast steel, and the surface of the base (1) is coated with protective coating; the top pressure component is a hydraulic jack (7), and the center of the hydraulic jack (7) is aligned with the force center of the adjustment surface of the plate gap to be adjusted.

7. A method for non-destructive leveling of the seam of a ship's joining plate using the tooling described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Insertion and positioning: Insert the strip plate (2) on the base (1) into the gap of the plate to be adjusted, loosen the first screw (4) and the second screw (6) so that the strip plate (2) is fully attached to the gap, and determine that the plate gap surface corresponding to the first screw (4) is the mounting surface and the plate gap surface corresponding to the second screw (6) is the adjustment surface. S2, snap-fit ​​fixing: Insert the movable pin (8) into the through hole on the strip plate (2) from the back of the plate seam, limit the movable pin (8) by the limiting block, so that the plate assembly is snapped into one side of the plate seam, and the tooling and the plate seam are positioned and connected. S3, Locking base (1): Rotate the adjusting head of the first screw (4) so ​​that the first screw (4) is screwed down and fits tightly against the mounting surface with the movable pin (8), locking the base (1) and the mounting surface into one piece; S4, Top pressure leveling: Place the depressurized top pressure component between the base (1) and the adjustment surface and ensure centering. Operate the top pressure component to perform the lifting operation until the mounting surface and adjustment surface on both sides of the plate joint are at the same level. Adjust the top pressure component to the pressure holding state. S5, Locking and leveling state: Rotate the adjusting head of the second screw (6) so that the second screw (6) is screwed down and tightly fits the adjusting surface, thus locking the adjusting surface and achieving plate seam leveling. After leveling is completed, remove the top pressure component and the plate seam welding operation can be carried out.

8. The method for non-destructive leveling of the seam of ship closure plates according to claim 7, characterized in that, In step S1, the appropriate strip plate (2) can be replaced by loosening the fastening bolt (10) according to the gap width of the plate seam to be adjusted and the plate thickness.

9. The method for non-destructive leveling of the seam of ship closure plates according to claim 7, characterized in that, In step S3, the first screw (4) is driven to screw in by a wrench or by manually turning the adjustment head, so as to achieve stepless locking of the mounting surface and adapt to mounting surfaces with different flatness.

10. The method for non-destructive leveling of the seam of ship closure plates according to claim 7, characterized in that, In step S5, after the first screw (4) and the second screw (6) are locked, the elastic rebound of the steel plates on both sides of the plate joint is restricted by the automatic alignment design of the bottom of the two screws, and the leveling accuracy of the plate joint is maintained.

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