A virtual segmentation method for side decks on PCTC ships

Abstract

This application relates to a side deck on a PCTC (Potentially Modified Tractor) ship, belonging to the field of shipbuilding equipment. It includes a side deck body with a width D2 greater than D1. The side deck body comprises a side deck portion and a midships deck portion, which are fixedly connected. This application addresses the problem of deformation during the fabrication of the upper side deck.

Description

Technical Field

[0001] This application relates to the field of shipbuilding equipment, and in particular to a virtual segmentation method for side decks on a PCTC ship. Background Technology

[0002] In the construction of large pure car carriers (PCTCs), the vehicle compartment side section is a key structural unit, and its manufacturing precision is directly related to the smoothness of the ship's lines and the structural integrity.

[0003] The structural design of the side deck components utilizes deck plates with relatively low thickness (typically within the thin plate category), resulting in inherently weak out-of-plane stiffness and limited resistance to deformation. The width of the side deck components is D1. Secondly, to meet the functional requirements of the vehicle compartment ventilation system, numerous air ducts need to be densely perforated on the deck surface. This high-density perforation distribution inevitably leads to a loss of effective load-bearing area of ​​the deck plate and creates numerous geometrically discontinuous regions. The combined effect of these two factors severely weakens the overall structural rigidity and geometric stability of the components.

[0004] The side deck components contain several areas of interlocking thickened plates designed for structural reinforcement or transition. During butt welding between these plates of varying thicknesses, the significant thickness differences, uneven heat transfer in the thickness direction, and variations in joint restraint easily induce substantial localized weld angular deformation and lateral shrinkage deformation. The combined effect of these factors results in uncontrollable multi-directional surface distortion (especially along the long edge) on the free edges of the deck component after manufacturing, a phenomenon commonly known as "wavy deformation," with the deformation amplitude significantly exceeding the tolerances allowed by the manufacturing process specifications. Summary of the Invention

[0005] To address the issue of deformation during the fabrication of the upper side deck, this application provides a method for virtual segmentation of the upper side deck on a PCTC ship.

[0006] The technical solution provided in this application for a small side deck on a PCTC ship adopts the following: A side deck on a PCTC ship includes a side deck body with a width of D2, which is greater than D1. The side deck body includes a side deck portion and a midship deck portion, which are fixedly connected.

[0007] Optionally, multiple side deck bodies are equidistantly arranged along the length direction, with a gap between two adjacent side deck bodies.

[0008] Optionally, an air duct is provided on the side wall of the side deck body, and a first thickened patch plate is fixed at the location of the air duct.

[0009] Optionally, the sidewall of the hull deck body is provided with column perforations, and a second thickened patch plate is fixed at the position of the column perforation.

[0010] A virtual segmentation method for side decks on PCTC ships, applied to the aforementioned side decks on PCTC ships, the method comprising: forming a virtual segmentation thin plate line along the width direction of multiple side deck bodies, with two adjacent side deck bodies abutting against each other.

[0011] Optionally, the deck side portion and the deck near midship portion of the side deck body are welded and fixed, and the deck side portion of one of the two adjacent side deck bodies is positioned and welded to the deck near midship portion of the other side deck body.

[0012] Optionally, the positioning weld is laser welding, and the welding length of the positioning weld is 100mm.

[0013] Optionally, the tack welds are arranged at seven equidistant points along the length of the side deck body, and the spacing between two adjacent tack welds is the same.

[0014] Optionally, it may also include longitudinal stiffeners, which are welded to the thin plate line of the side deck body.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. Firstly, the issues of wave deformation and insufficient dimensions of the small deck sections on the hull side were resolved. Secondly, the creation of virtual thin-plate sections improved the efficiency of section fabrication and ensured the deck's levelness. The overall solution ensured the fabrication precision of the small deck sections on the upper hull side and improved production efficiency.

[0016] 2. By optimizing the side section division, the width of the small deck is widened, and multiple small decks are merged into one thin plate section. The sections are then laser-welded in the thin plate assembly line workshop to reduce heat input, improve construction efficiency, and ensure the precision of small deck manufacturing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of a PCTC shipboard side deck and its virtual segmentation method in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the structure of the side deck body of a PCTC ship's side deck and its virtual segmentation method in an embodiment of this application.

[0019] Figure 3This is a schematic diagram of the virtual segmentation structure of a PCTC shipboard side deck and its virtual segmentation method in an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Longitudinal frame; 2. Side deck body; 21. Side portion of deck; 22. Midships portion of deck; 3. Tack weld. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0023] In the construction of large pure car carriers (PCTCs), the vehicle compartment side section is a key structural unit, and its manufacturing precision is directly related to the smoothness of the ship's lines and the structural integrity.

[0024] The structural design of the side deck components utilizes deck plates with relatively low thickness (typically within the thin plate category), resulting in inherently weak out-of-plane stiffness and limited resistance to deformation. The width of the side deck components is D1. Secondly, to meet the functional requirements of the vehicle compartment ventilation system, numerous air ducts need to be densely perforated on the deck surface. This high-density perforation distribution inevitably leads to a loss of effective load-bearing area of ​​the deck plate and creates numerous geometrically discontinuous regions. The combined effect of these two factors severely weakens the overall structural rigidity and geometric stability of the components.

[0025] The side deck components contain several areas of interlocking thickened plates designed for structural reinforcement or transition. During butt welding between these plates of varying thicknesses, the significant thickness differences, uneven heat transfer in the thickness direction, and variations in joint restraint easily induce substantial localized weld angular deformation and lateral shrinkage deformation. The combined effect of these factors results in uncontrollable multi-directional surface distortion (especially along the long edge) on the free edges of the deck component after manufacturing, a phenomenon commonly known as "wavy deformation," with the deformation amplitude significantly exceeding the tolerances allowed by the manufacturing process specifications.

[0026] To address the issue of deformation during the fabrication of the upper side deck, this application provides a method for virtual segmentation of the upper side deck on a PCTC ship.

[0027] The following is in conjunction with the appendix Figure 1-3This application will be described in further detail.

[0028] This application discloses a method for virtual segmentation of a side deck on a PCTC ship. (Refer to...) Figure 1 , Figure 2 A PCTC shipboard side deck includes a longitudinal skeleton 1, and a plurality of side deck bodies 2 are respectively provided on one side of the longitudinal skeleton 1. The side deck bodies 2 are arranged along the longitudinal direction of the longitudinal skeleton 1. The spacing between two adjacent side deck bodies 2 is the same, and the side deck bodies 2 are welded to the longitudinal skeleton 1.

[0029] In some embodiments, the side deck body 2 includes a deck side portion 21 and a deck near midship portion 22 disposed opposite to each other. The deck side portion 21 and the deck near midship portion 22 are disposed in parallel, and the upper surface of the deck side portion 21 is parallel to the upper surface of the deck near midship portion 22. The lower surface of the deck side portion 21 is parallel to the lower surface of the deck near midship portion 22, and one side wall of the deck side portion 21 is abutted and fixed to one side wall of the deck near midship portion 22.

[0030] In some embodiments, the width of the side deck body 2 is formed by the width of the deck side portion 21 and the deck near midship portion 22, and the width of the side deck body 2 is D2, which is greater than D1, thereby optimizing the width of the side deck on the PCTC ship. In some embodiments, D1 is 2050 mm and D2 is 4960 mm.

[0031] An air duct is provided on the side wall of the side deck body 2, and a first thickened plate patch is fixedly installed at the position of the air duct. A column perforation is provided on the side wall of the side deck body 2, and a second thickened plate patch is fixedly installed at the position of the column perforation.

[0032] Reference Figure 2 , Figure 3 This application also discloses a virtual segmentation method for side decks on PCTC ships, which is applied to the aforementioned side decks on PCTC ships. The virtual segmentation method for side decks on PCTC ships includes: forming a virtual segment thin plate line along the width direction using multiple side deck bodies 2, with adjacent side deck bodies 2 abutting against each other. The multiple side deck bodies 2 distributed along the width direction are arranged along the length direction of the thin plate conveyor line, enabling the thin plate conveyor line to drive the multiple side deck bodies 2 to move along the conveying direction of the thin plate conveyor line. In a specific embodiment, the total width of the virtual segment is 24.8 meters, and the length does not exceed 15 meters.

[0033] The deck side portion 21 and the deck near midship portion 22, located within the same side deck body 2, are welded and fixed together, and adjacent two side deck bodies 2 are welded together by laser tack welding 3. This reduces heat input, improves construction efficiency, and ensures the precision of small deck fabrication.

[0034] The welding direction of the laser positioning weld 3 is set along the width direction of the thin plate production line, and the welding points of the laser positioning weld 3 are set at intervals. The spacing between two adjacent laser positioning welds 3 is the same. In a specific embodiment, seven laser positioning welds 3 are set at equal intervals along the width direction of the thin plate production line, and the welding length of the laser positioning weld 3 is 100mm.

[0035] The panel assembly station operates according to the original model, with multiple spot welding points used to fix different deck panels 2 on different sides. Currently, there are no automatic spot welding instructions for each section; manual setting is required for each section at a time. Relevant instructions should be provided for spot welding operations until the panel assembly is completed, after which the station is moved. Thin plate line allowances and milling edge allowances should be considered as a whole (not for individual deck panels). The maximum working range of the ESAB cutting station is 30 meters and cannot be exceeded. The cutting GEN model for this station must be merged into a single instruction. The cutting instruction must be created as a single sheet model before instruction conversion can be performed. All scribing and cutting operations use the same positioning reference, and the remaining steps are performed according to the original mode.

[0036] According to the original model, the longitudinal rib welding station needs to use the overall large plate GEN and profile model to convert instructions and carry out longitudinal rib welding operations.

[0037] The instructions required for the welding station of the T-Beam robot must be combined into a single STP model so that the offline programming software can recognize and convert the instructions.

[0038] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A method for virtual segmentation of side decks on a PCTC ship, characterized in that: The method is applied to the side deck of a PCTC ship, wherein the side deck includes a side deck body (2), the width of a conventional side deck component is D1, the side deck body (2) includes a deck side part (21) and a deck near midship part (22), the width of the side deck body (2) is formed by the width of the deck side part (21) and the deck near midship part (22), and the width of the side deck body (2) is D2, D2 is greater than D1, the deck side part (21) and the deck near midship part (22) are fixedly connected; the method includes: forming a thin plate line on a virtual segment along the width direction of multiple side deck bodies (2), and two adjacent side deck bodies (2) abut against each other.

2. The virtual segmentation method for the side decks on a PCTC ship according to claim 1, characterized in that: Multiple side deck bodies (2) are equidistantly arranged along the length direction, with a gap between two adjacent side deck bodies (2).

3. The virtual segmentation method for the side decks on a PCTC ship according to claim 1, characterized in that: The side wall of the side deck body (2) is provided with an air duct, and a first thickened plate patch plate is fixed at the location of the air duct.

4. The virtual segmentation method for the side decks on a PCTC ship according to claim 1, characterized in that: The side wall of the side deck body (2) is provided with column perforations, and a second thickened plate patch is fixed at the column perforation position.

5. The virtual segmentation method for the side deck of a PCTC ship according to claim 1, characterized in that: The deck side portion (21) and the deck near midship portion (22) of the side deck body (2) are welded and fixed, and the deck side portion (21) of one of the two adjacent side deck bodies (2) is tack welded to the deck near midship portion (22) of the other side deck body (2) (3).

6. The virtual segmentation method for the side deck of a PCTC ship according to claim 5, characterized in that: The positioning weld (3) is laser welded, and the welding length of the positioning weld (3) is 100mm.

7. The virtual segmentation method for the side decks on a PCTC ship according to claim 5, characterized in that: The welding points of the locating weld (3) are arranged at seven equal intervals along the length of the side deck body (2), and the distance between the welding points of two adjacent locating welds (3) is the same.

8. The virtual segmentation method for the side deck of a PCTC ship according to claim 1, characterized in that: It also includes longitudinal stiffeners (1), which are welded to the thin plate line of the side deck body (2).

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