A ship block construction method using construction-checking auxiliary lines

Abstract

A ship section construction method using construction-check auxiliary lines belongs to the field of ship manufacturing. By setting a construction-check auxiliary surface in a ship section overall design system, the surface intersects with a section internal frame to generate a construction-check auxiliary line; the line is drawn on the section internal frame during section internal frame processing and manufacturing; when the section internal frame is assembled to the section plate, the construction-check auxiliary line is used in combination with a structure installation position line and a connection relationship between other components to assist positioning, and the construction-check auxiliary line is used to check the installation precision of the section internal frame. Using the method, the construction precision of the internal structure can be well ensured under the construction mode with the plate as the fetus, the construction precision of the section with complex line type during construction with the plate as the fetus is improved, the section edge allowance is eliminated, the edge trimming operation amount during the closure of the sections on the berth or the dock is reduced, the shipbuilding cycle is shortened, and the shipbuilding cost is reduced.

Description

Technical Field

[0001] This invention relates to a method for constructing ship sections using construction-inspection auxiliary lines, which belongs to the field of shipbuilding. Background Technology

[0002] China's shipbuilding industry has risen rapidly. From a technical perspective, one of the main research topics is reducing the difficulty and improving the precision of sectional construction, thereby shortening the shipbuilding cycle. The middle section of a ship is often a straight section with complex bow and stern lines. Currently, one common construction method for complex sections is to use a deck or platform as a base, with outer plates attached as a backing. This method simplifies sectional construction and ensures the installation precision of the internal plates and frames within each section. However, it cannot guarantee the correct outer plate alignment.

[0003] Another type is constructed by using the outer panel as a template for upright or horizontal construction. This involves combining tooling templates that fit the outer panel's lines, allowing the segmented outer panel to "sit" on the template for construction. The advantage of this method is that it can ensure the accuracy of the outer panel's lines. However, the disadvantage is that the internal parts of the segment can only be assembled by using the structural lines on the outer panel and the contact shapes between the structures. There is a lack of installation reference. In this way, apart from the accuracy of the outer panel, the accuracy of the installation of the rest of the internal structure cannot be guaranteed.

[0004] Currently, the industry's commonly used method for ensuring the accuracy of sectional construction of the outer plating relies solely on baselines parallel to the ship's length, beam, and height, along with the interconnections between internal structures, for positioning. However, because the state of most sections constructed using this method does not conform to the normal hull shape, the aforementioned baselines cannot be easily and accurately measured on-site, ultimately resulting in insufficient precision in section fabrication. Summary of the Invention

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a construction-inspection auxiliary line. This auxiliary line is set according to the segmented state when the outer plate is used as the tire for segmented construction. It allows for convenient and accurate measurement at the assembly site, and the internal plate frame of the segment is assembled onto the outer plate of the segment for the manufacture of ship segments.

[0006] The technical solution adopted in this invention includes the following steps: S1, design and construction - inspection of auxiliary lines; S1.1 Based on software design, the base surface of the jig is adjusted to adjust the segmentation status; so that the vertical distance difference between each corner point of the outer perimeter of the segment and the base surface of the jig is minimized, and the distance between the lowest point of the outer perimeter of the segment and the base surface of the jig is greater than 500mm. S1.2 Draw the support structure diagram and record the spatial coordinates of each corner point of the outer perimeter of the segmented outer plate relative to the base surface of the jig, as reference points; S1.3 Set a construction-inspection auxiliary surface parallel to the base surface of the jig, adjust the height of the construction-inspection auxiliary surface so that it intersects with the internal plate frame of the segment where the construction-inspection auxiliary line is required, and the construction-inspection auxiliary line is obtained by the intersection of the plane where the plate frame is located and the construction-inspection auxiliary surface; S1.4 Based on the obtained construction-inspection auxiliary lines, they are written into the segmented structure model statement through modeling, so that the lines are displayed on the parts formed after the model is divided. S2. Marking construction-inspection auxiliary lines on the internal panel frame of the segment: During the cutting and marking stage of the internal panel frame parts of the segment, the construction-inspection auxiliary lines are marked on the internal panel frame of the segment by using a cutting machine to spray powder and mark the lines. S3. Install the segmented outer panels: Use the ground where the frame is installed as the base surface of the frame, set the height of the support according to the frame support diagram, and lay the segmented outer panels on the frame. During installation, the segmented outer panels are positioned and installed based on the reference points in step S1.2. S4. Installation of internal panel frames in sections: S4.1 Install the internal panel frame of the segment to the installation position line of the external panel of the segment, so that the edge of each internal panel frame of the segment coincides with the corresponding installation position line; S4.2 Control the connection between the edge of the internal panel frame of the segment and the structure on the outer panel or other internal panel frames of the segment, and make each independent construction-inspection auxiliary line a horizontal line to prevent the internal panel frame of the segment from shifting left and right or rotating. S4.3 Ensure that the construction-inspection guide lines on the internal frame of each section are on the same horizontal plane, that is, there is no height difference between the construction-inspection guide lines, to prevent the frame from tipping over; thereby completing the construction of the ship sections.

[0007] Furthermore, in step S3, the specific process of positioning and installation is as follows: S3.1 Project the reference points of each corner of the outer perimeter of the segmented outer plate onto the ground where the jig is installed, and use them as ground installation reference points to hoist the segmented outer plate onto the jig at the corresponding position; S3.2 Measure the coordinates of the projection points of each corner point of the outer section of the outer panel onto the ground where the jig is installed. Based on the positional difference between the projection point coordinates and the ground installation reference point coordinates, adjust the position of the outer section of the outer panel until the projection point and the ground installation reference point coincide, thus completing the positioning and installation of the outer panel.

[0008] Furthermore, in step S4, the height difference between the two ends of the construction-inspection auxiliary line and the height difference between the construction-inspection auxiliary lines are controlled within a precision range of ±3mm.

[0009] Compared with existing technologies, this invention has the following advantages: All construction-inspection auxiliary lines on the structure are in a single plane, forming a construction-inspection auxiliary surface. This surface is parallel to the jig base surface (ground), allowing for convenient on-site measurement and use as a precision inspection line to improve the accuracy of segmented construction. When using an outer plating as a jig, this auxiliary line effectively ensures the construction accuracy of the internal structure, improves the construction accuracy of complex segments with outer plating, eliminates edge allowances, reduces the amount of trimming work at the edges when segments are joined on the slipway or in the dry dock, shortens the shipbuilding cycle, and reduces shipbuilding costs. Overall, it reduces construction difficulty and avoids the drawbacks of using outer plating as a jig. Therefore, for complex segments requiring guaranteed outer plating lines, the outer plating jig construction method can be chosen more frequently. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a segmented design system.

[0012] Figure 2 This is a segmented overall diagram.

[0013] Figure 3 This is a schematic diagram of the segmented outer panel.

[0014] Figure 4 yes Figure 2 Schematic diagram of a single internal panel frame in direction B.

[0015] in: 1. Base surface of the jig; 11. Ground surface for jig installation; 120. Jig; 2. Segmentation; 21. Segment outer panel; 21a. Segment outer panel outer corner point a; 21b. Segment outer panel outer corner point b; 21c. Segment outer panel outer corner point c; 21d. Segment outer panel outer corner point d; 22. Segment internal panel frame; 23. Structural installation position line. 3. Build - Inspect auxiliary surfaces; 4. Build and check the auxiliary lines; Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0020] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0023] A method for constructing ship sections using construction-inspection guidelines includes three main steps: S1, Design Phase; S2, Manufacturing Phase; S3, Assembly Phase. For ease of description, a spatial rectangular coordinate system is used, with the horizontal directions being the X and Y axes, and the height direction being the Z axis.

[0024] S1, Design Phase: Generate Construction - Check Auxiliary Line 4; The manufacturing method of this segment 2 involves using the segment outer plate 21 as a base to create a jig 120. During the design phase, the overall design system includes parameters for the jig 120 that mates with the segment 2. When using the segment outer plate 21 as a base, a tooling plate is designed based on the shape of the segment outer plate 21 and its coordinates relative to the hull in the length, width, and height directions. This tooling plate has a shape that fits against the outer surface of the segment outer plate 21, and the height of the jig 120 is set according to the outer surface of the segment outer plate 21.

[0025] S1a. Set a base surface 1 for the jig: First, adjust the state of segment 2 to minimize the distance difference between the corner points of the outer perimeter of the segment and the base surface 1 of the jig. This state allows the outer segment 21 to be placed more stably on the jig 120, thereby reducing the construction risk of segment 2. The distance between the lowest point of the outer segment 21 and the jig installation ground 11 should be greater than 500mm to facilitate the assembly and welding of the outer segment by workers.

[0026] In theory, any plane can be used as the base surface 1 of the jig, and its relative positional relationship with the jig mounting ground 11 can be determined by calculation and measurement. In practice, for ease of design and assembly, the jig mounting ground 11 can be used as the base surface 1 of the jig, which is convenient for on-site measurement and application.

[0027] S1b: Record the coordinates of the points projected onto the base surface 1 of the jig frame in the X and Y directions, as well as the vertical distance (distance in the Z direction) between the corner points of the outer perimeter of the segmented outer plate and the base surface 1 of the jig frame.

[0028] When using the mounting surface 11 of the jig as the jig base surface 1, record the coordinates of the points projected onto the mounting surface 11 of the jig in the X and Y directions, as well as the vertical distance (distance in the Z direction) between the corner points of the outer perimeter of the segmented outer plate and the mounting surface 11 of the jig.

[0029] S1c. Set a construction-inspection auxiliary surface 3, making it parallel to the base surface 1 of the jig. Adjust the height of the construction-inspection auxiliary surface 3 so that it intersects with most of the internal plates of the segment, thus obtaining the construction-inspection auxiliary line 4. Cut the section of the internal plate of each segment, and the construction-inspection auxiliary surface 3 will project a scribing line into this section. This line is the construction-inspection auxiliary line 4.

[0030] Here, one can selectively choose a larger segment internal plate frame 22, a segment internal plate frame 22 with high installation accuracy requirements, or a segment internal plate frame 22 with fewer positioning lines.

[0031] S1d. Write the obtained construction-inspection auxiliary line 4 into the segment 2 structural model through modeling, so that the parts formed after the model is divided can display this line.

[0032] Currently, domestic ship hull modeling software includes AM, TRIBON, SPD, etc. Regardless of the software, it is easy to create MARK lines within the ship hull structure.

[0033] After writing the construction-inspection guide line 4 into the modeling statement of the hull model, the parts after splitting (that is, converting the model into a nested part) the internal plate frame of the segment can display the construction-inspection guide line 4.

[0034] S2, Manufacturing Stage: Draw construction-inspection auxiliary line 4; S2a. During the cutting and marking stage of the internal panel 22 parts in the segment, the construction-inspection auxiliary line 4 is marked onto the internal panel 22 parts in the segment by using the powder spraying marking function of the cutting machine. Run the cutting data of the internal panel 22 parts in the segment, input the data in S1d into the cutting machine, and the powder spraying marking function of the cutting machine can spray the construction-inspection auxiliary line 4 onto the internal panel 22 parts in the segment.

[0035] During the cutting and marking stage, the construction-inspection auxiliary line 4 is marked onto the internal plate frame of the segment by spraying powder with a cutting machine. This can effectively ensure the positional accuracy of the construction-inspection auxiliary line 4, thereby improving the positioning and assembly accuracy.

[0036] Through the above steps, construction-inspection auxiliary lines 4 were drawn on all structures that intersect with the construction-inspection auxiliary surface 3.

[0037] S3, Assembly Stage: Use Construction-Inspection Guide Line 4; The construction-inspection auxiliary line 4 is used as a positioning reference line during assembly and construction, and is coordinated with the structural installation position line 23 and the connection relationship between various mechanisms to position the internal plate frame 22 of each segment; during inspection, it is used as a reference benchmark to evaluate the installation accuracy of the internal plate frame 22 of each segment.

[0038] S3a. Place the segmented outer plate 21 on the prepared jig 120, and measure the X and Y coordinates of each corner point of the outer plate and the reference point projected onto the jig base surface 1, as well as the vertical distance (Z-direction distance) between each corner point of the outer plate and the jig base surface 1. The accuracy is controlled within the set range to ensure that the outer plate placement is consistent with the design system.

[0039] S3a, Make each individual construction-inspection guideline 4 a horizontal line.

[0040] During on-site assembly, instruments such as level hoses or levels can be used to check the construction – check auxiliary line 4. The use of level hoses utilizes the principle of U-shaped tubes (communicating vessels principle) – with both ends of the U-shaped tube open, the liquid level inside the tube will remain consistent due to air pressure.

[0041] During testing, ensure that any two points on the construction-inspection auxiliary line 4 are at the same height or have the same height difference with the liquid level inside the U-tube.

[0042] The level uses the principle that the laser emitted by the instrument is in a horizontal plane. During the test, it is necessary to ensure that any two points on the construction-inspection auxiliary line 4 are at the same vertical height from the laser beam.

[0043] Either method can be chosen on-site based on the angle that is convenient for measurement.

[0044] S3b. Ensure that all construction-inspection guide lines 4 are on the same horizontal plane, i.e., there is no height difference between construction-inspection guide lines 4.

[0045] S3a ensures that there is no height difference between the two ends of each independent construction-inspection guideline 4, that is, the construction-inspection guideline 4 itself does not swing, so the structure in which the construction-inspection guideline 4 is located will not swing. S3b ensures that there is no height difference between all construction-inspection auxiliary lines 4, that is, all construction-inspection auxiliary lines 4 are in the same horizontal plane, thus ensuring that there will be no misalignment between structures; S3c, using the structural installation position lines 23 on the outer panel or other segmented internal frame, align each structure with its corresponding position line.

[0046] By ensuring that all the designated construction-inspection auxiliary lines 4 are on the same horizontal plane, and by combining the marking of the outer plate and internal structure and the connection method between the structures, the displacement of the structure in segment 2 in various dimensions can be controlled. This means that the structural surface can be prevented from rotating around the construction-inspection auxiliary line 4, and the entire structural surface can be prevented from shifting back and forth, which will ultimately improve the construction accuracy of segment 2.

[0047] S3d controls the cut-off position lines of the internal panel edges on the outer plate or other internal panel frames, as well as the connection relationships between various structures, and can prevent the surface of the internal panel frame from shifting left or right.

[0048] S3e, Check the height difference between the two ends of the construction-inspection auxiliary line 4 and the height difference between each construction-inspection auxiliary line 4. The accuracy control range should be within ±3mm.

[0049] Within this precision range, the overall construction precision of segment 2 can be guaranteed.

[0050] At this point, the displacement in all dimensions of each structure is fixed—there will be no rotation, tilting, or translation (left, right, forward, backward). The installation accuracy of the structure within segment 2 can be guaranteed.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for constructing ship sections using construction-inspection guidelines, characterized in that, Includes the following steps: S1. Design and construction - check auxiliary lines; S1.

1. Based on the software design of the jig base surface, adjust the segmentation state; minimize the vertical distance difference between each corner point of the outer perimeter of the segment and the jig base surface, and make the distance between the lowest point of the outer segment and the jig base surface greater than 500mm. S1.2 Draw the support structure diagram and record the spatial coordinates of each corner point of the outer perimeter of the segmented outer plate relative to the base surface of the jig, as reference points; S1.

3. Set a construction-inspection auxiliary surface parallel to the base surface of the jig. Adjust the height of the construction-inspection auxiliary surface so that it intersects with the internal plate frame of the segment where the construction-inspection auxiliary line is needed. The construction-inspection auxiliary line is obtained by intersecting the plane of the plate frame with the construction-inspection auxiliary surface. S1.

4. Based on the obtained construction-inspection auxiliary lines, write them into the segmented structure model statement through modeling so that the lines are displayed on the parts formed after the model is divided. S2. Marking construction-inspection auxiliary lines on the internal panel frame of the segment: During the cutting and marking stage of the internal panel frame parts of the segment, the construction-inspection auxiliary lines are marked on the internal panel frame of the segment by using a cutting machine to spray powder and mark the lines. S3. Install the segmented outer panels: Use the ground where the jig is installed as the base surface of the jig, set the height of the support column according to the jig support column drawing, and lay the segmented outer panels on the jig; during installation, use the reference point in step S1.2 as a reference to position and install the segmented outer panels. S4. Installation of internal panel frames in sections: S4.1 Install the internal panel frame of the segment to the installation position line of the external panel of the segment, so that the edge of each internal panel frame of the segment coincides with the corresponding installation position line; S4.2 Control the connection between the edge of the internal panel frame of the segment and the structure on the outer panel or other internal panel frames of the segment, and make each independent construction-inspection auxiliary line a horizontal line to prevent the internal panel frame of the segment from shifting left and right or rotating. S4.3 Ensure that the construction-inspection guide lines on the internal frame of each section are on the same horizontal plane, that is, there is no height difference between the construction-inspection guide lines, to prevent the frame from tipping over; thereby completing the construction of the ship sections.

2. The method for constructing ship sections using construction-inspection auxiliary lines according to claim 1, characterized in that, In step S3, the specific process of positioning and installation is as follows: S3.1 Project the reference points of each corner of the outer perimeter of the segmented outer panel onto the ground where the jig is installed, and use them as ground installation reference points to hoist the segmented outer panel onto the jig at the corresponding position; S3.2 Measure the coordinates of the projection points of each corner point of the outer section of the outer panel onto the ground where the jig is installed. Based on the positional difference between the projection point coordinates and the ground installation reference point coordinates, adjust the position of the outer section of the outer panel until the projection point and the ground installation reference point coincide, thus completing the positioning and installation of the outer panel.

3. The method for constructing ship sections using construction-inspection auxiliary lines according to claim 1 or 2, characterized in that, In step S4, the height difference between the two ends of the construction-inspection auxiliary line and the height difference between the construction-inspection auxiliary lines are controlled within ±3mm.

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