Ship hull plate positioning and structural lineation data lofting method

Abstract

The invention relates to the technical field of ship manufacturing, in particular to a ship hull plate positioning and structural lineation data lofting method, which comprises the following steps of: marking a rib line, a first rib position line, a first height waterline, a second height waterline and a third height waterline according to a port rib theoretical line graph in a segment range; a first structure compensation amount is added to each gear of rib line in the port rib theoretical line graph in the height direction of the ship body; forming a jig frame center line after reverse deformation; determining the distance from each frame line to the base plane of the jig frame at the center line of the jig frame; the first reversible deformation line type, the second reversible deformation line type and a rib line between the first height waterline and the third height waterline form a rib line type graph; drawing a larboard planking positioning map according to the rib line drawing and the designed planking expansion drawing; and acquiring outer plate positioning data and structural line positioning data. According to the method, outer plate positioning and structure assembly positioning data of increasing the welding shrinkage in the transverse direction and the height direction in a regional mode can be effectively obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method for positioning a hull outer plate and setting out its structural marking data. Background Art

[0002] Welding distortion during aluminum alloy shipbuilding is greater than that of steel vessels and is difficult to control. This is especially true for the production of tapered bow sections, where appropriate welding shrinkage and counter-distortion must be applied to the templated cradles to minimize welding distortion. This places high demands on the positioning of the outer plating against the cradles and the marking of the structural assembly positions. Each positioning data must account for the welding shrinkage and counter-distortion added during cradle fabrication. However, production data generated by conventional shipbuilding systems only applies to situations with and without welding shrinkage in the longitudinal direction; it is not applicable to situations where welding shrinkage and counter-distortion are applied to specific areas in the transverse and height directions.

[0003] Therefore, a method for locating the hull outer plate and drawing out its structural marking data is needed to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a method for locating the outer plate of a hull and laying out its structural marking data, which can effectively obtain the outer plate positioning and structural assembly positioning data with welding shrinkage added in different areas in the transverse and height directions.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The method for locating the hull outer plate and setting out its structural marking data includes the following steps:

[0007] S1. Using the port side manufacturing method, mark the frame line, first frame position line, first height waterline, second height waterline, and third height waterline according to the port side frame theoretical line diagram within this subsection, where the heights of the first height waterline, the second height waterline, and the third height waterline increase in sequence;

[0008] S2. adding a first structural compensation amount to each frame line in the port frame theoretical line diagram along the height direction of the hull;

[0009] S3, taking the intersection of the first rib position line and the adjusted second height waterline as the origin, gradually shifting the second height waterline toward the side along the ship length by a first reverse deformation amount as a step size to form a centerline of the tire frame after reverse deformation;

[0010] S4. Determine the distance from the rib line of each gear to the tire frame reference plane at the tire frame centerline;

[0011] S5. In the height direction, all the rib lines in the region from the first height waterline to the keel bottom surface of the hull are gradually offset by a first set value toward the side to form a first inverse deformation line shape. All the rib lines in the region from the third height waterline to the deck sideline of the hull are gradually offset by the first set value toward the side to form a second inverse deformation line shape. The first inverse deformation line shape, the second inverse deformation line shape, and the rib lines between the first height waterline and the third height waterline form a rib line shape diagram.

[0012] S6. Draw a port side outer plating positioning diagram based on the rib line drawing and the designed outer plating development diagram;

[0013] S7. Acquire outer plate positioning data and structural line positioning data according to the port outer plate positioning diagram.

[0014] In some embodiments, in step S5, the intersection of the first rib position line and the first height waterline is used as the first reference point, and the first reference point is used as the base point to determine the offset of all the rib lines toward the side in the area from the first height waterline to the keel bottom surface of the hull.

[0015] In some embodiments, in step S5, the intersection of the first rib line and the third height waterline is used as the second reference point, and the second reference point is used as the base point to determine the offset of all the rib lines toward the side within the range from the third height waterline to the deck edge line of the hull.

[0016] In some embodiments, in step S5, the deck edge line is the intersection line of the lower end surface of the deck and the side of the hull.

[0017] In some embodiments, in step S6, the outer plate of the current section needs to be extended by a first welding shrinkage compensation amount in the length direction of the hull.

[0018] In some embodiments, the first welding shrinkage compensation amount increases by 2 mm for every 600 mm.

[0019] In some embodiments, in step S7, the projection of the second height waterline on the tire frame reference plane is taken as the X-axis, and the projection of the middle rib position line in the port shell plating positioning diagram on the tire frame reference plane is taken as the Y-axis. The horizontal distance from the intersection of each longitudinal seam in the port shell plating positioning diagram on each rib position line to the X-axis, the arc length from the intersection to the Y-axis, and the distance from the intersection to the tire frame reference plane are measured to obtain the shell plating seam positioning data.

[0020] In some embodiments, the tire frame reference plane is a horizontal plane 600 mm from the ground.

[0021] In some embodiments, the positioning data of each structural line is generated according to the arc length from the intersection of each rib line and each structural line on the port shell positioning diagram to the X-axis.

[0022] In some embodiments, in step S5, the first set value is 5 mm.

[0023] Beneficial effects of the present invention:

[0024] The present invention provides a method for positioning hull plating and laying out its structural marking data. Using a port side manufacturing method, the method marks the rib lines, first rib position line, first height waterline, second height waterline, and third height waterline according to a theoretical port rib line diagram within a specific segment. A first structural compensation amount is added to each rib line in the theoretical port rib line diagram along the hull height. With the intersection of the first rib position line and the adjusted second height waterline as the origin, the second height waterline is gradually offset toward the side along the ship's length in increments of a first deflection amount to form a deflected carcass centerline. The distance from each rib line to the carcass reference plane is determined based on the carcass centerline. In the vertical direction, all rib lines in the area from the first height waterline to the keel bottom surface of the hull are gradually offset by a first set value toward the side to form a first inverse deformation line. In the area from the third height waterline to the deck edge of the hull, all rib lines are gradually offset by a first set value toward the side to form a second inverse deformation line. The first inverse deformation line, the second inverse deformation line, and the rib lines located between the first and third height waterlines form a rib line diagram. Based on the rib line diagram and the designed shell expansion drawing, a port shell positioning diagram is drawn. Shell positioning data and structural line positioning data are obtained based on the port shell positioning diagram. In this way, the first structural compensation amount and inverse deformation amount of welding deformation in the vertical direction, as well as the first inverse deformation amount in the width direction, are all calculated into the rib line diagram, thereby ensuring the accuracy of the subsequently generated port shell positioning diagram and accurately obtaining the shell positioning and structural assembly positioning data for each region in the transverse and height directions after adding welding shrinkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 This is a flow chart of a method for positioning hull outer plate and setting out its structural marking data according to the present invention;

[0027] Figure 2It is a layout diagram of the X-axis and the Y-axis in a method for positioning the outer plate of a hull and laying out its structural marking data according to the present invention. DETAILED DESCRIPTION

[0028] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0029] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0031] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0033] In the process of aluminum alloy ship construction, in order to effectively obtain the outer plate positioning and structural assembly positioning data of the welding shrinkage in the transverse and height directions, such as Figure 1-Figure 2 As shown, the present invention provides a method for locating the outer plate of a hull and setting out its structural marking data. The method for locating the outer plate of a hull and setting out its structural marking data comprises the following steps:

[0034] S1. Using the port side manufacturing method, mark the frame line, first frame position line, first height waterline, second height waterline and third height waterline according to the port side frame theoretical line diagram within this subsection, where the heights of the first height waterline, second height waterline and third height waterline increase in sequence;

[0035] S2. Add the first structural compensation amount to each frame line in the port frame theoretical line diagram along the height direction of the hull;

[0036] S3, taking the intersection of the first rib position line and the adjusted second height waterline as the origin, gradually shifting the second height waterline toward the side along the ship length by the first anti-deformation amount as a step size to form a centerline of the tire frame after anti-deformation;

[0037] S4. Determine the distance from each rib line to the tire frame reference plane at the tire frame centerline;

[0038] S5. In the height direction, all rib lines in the area from the first height waterline to the keel bottom of the hull are gradually offset by a first set value toward the side to form a first inverse deformation line shape. All rib lines in the area from the third height waterline to the deck side line of the hull are gradually offset by the first set value toward the side to form a second inverse deformation line shape. The first inverse deformation line shape, the second inverse deformation line shape, and the rib lines between the first height waterline and the third height waterline form a rib line shape diagram.

[0039] S6. Draw the port side shell plating positioning drawing based on the frame line drawing and the designed shell plating development drawing;

[0040] S7. Obtain outer plating positioning data and structural line positioning data according to the port outer plating positioning diagram.

[0041] In this way, the first structural compensation amount and the reverse deformation amount of the welding deformation in the height direction and the first reverse deformation amount in the width direction are all calculated into the rib line diagram, thereby ensuring the accuracy of the subsequently formed port shell plate positioning diagram and ensuring accurate acquisition of the shell plate positioning and structural assembly positioning data of the shell plate with welding shrinkage added to the regions in the transverse and height directions.

[0042] In some embodiments, in step S5, the intersection of the first rib line and the first height waterline is used as a first reference point, and the offset of all rib lines in the region from the first height waterline to the keel bottom surface of the hull toward the side is determined using the first reference point as a base point. Setting the first reference point facilitates reference when adjusting the offset of the rib lines, thereby ensuring the accuracy of the obtained first inverse deformation line shape.

[0043] In some embodiments, in step S5, the intersection of the first rib line and the third-height waterline serves as a second reference point. The offset of all rib lines toward the side of the ship between the third-height waterline and the deck edge of the hull is determined using the second reference point as a base point. Setting the second reference point facilitates reference when adjusting the offset of the rib lines, thereby ensuring the accuracy of the obtained second inverse deformation line shape. In some embodiments, the first set value is 5 mm. By pre-setting the inverse deformation amount, deformation can be offset after welding, thereby ensuring the stability of the hull structure.

[0044] In some embodiments, in step S5, the deck edgeline is the intersection line of the lower end surface of the deck and the side of the hull. Because the lower end surface of the deck is relatively flat and its installation position on the hull is relatively accurate, using the intersection line of the lower end surface of the deck and the side of the hull as the deck edgeline can effectively obtain the second inverse deformation line shape formed by the frame line gradually shifting toward the side by the first set value, thereby ensuring the accuracy of the second inverse deformation line shape.

[0045] In some embodiments, in step S6, the outer plating of the current section is extended by a first welding shrinkage compensation amount in the length direction of the hull. Since the hull material shrinks somewhat after cooling after welding, setting the first welding shrinkage compensation amount allows compensation to be made in the length direction of the hull after cooling after welding, ensuring that the completed hull meets the required length and maintains the stability of the hull.

[0046] In some embodiments, the first weld shrinkage compensation amount increases by 2 mm for every 600 mm. This approach effectively compensates for shrinkage along the length of the hull and ensures that the first weld shrinkage compensation amount can accommodate subsequent hull shrinkage. In other embodiments, the first weld shrinkage compensation amount can be designed based on the hull's material and dimensions, and no further limitations are imposed herein.

[0047] In some embodiments, in step S7, the projection of the second-height waterline on the carcass datum plane is used as the X-axis, and the projection of the mid-rib position line in the port shell plating alignment diagram on the carcass datum plane is used as the Y-axis. The shell plating seam positioning data is obtained by measuring the horizontal distance from the intersection of each longitudinal seam on each rib position line in the port shell plating alignment diagram to the X-axis, the arc length from the intersection to the Y-axis, and the distance from the intersection to the carcass datum plane. This method accurately obtains three-dimensional data of the intersection of each longitudinal seam on each rib position line, thereby facilitating subsequent guidance for shell plating installation.

[0048] In some embodiments, the tire frame reference plane is a horizontal plane 600 mm from the ground. Through the above-mentioned method, the construction space for the construction workers can be guaranteed, thereby facilitating the construction workers to perform construction operations.

[0049] In some embodiments, the positioning data for each structural line is generated based on the arc length from the intersection of each rib line and each structural line on the port shell positioning diagram to the X-axis. Because the shell has a certain curvature, the positioning data for the structural line can be accurately determined by measuring the arc length.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for positioning the hull outer plate and drawing out its structural marking data, characterized in that: The steps include: S1. Using the port side manufacturing method, mark the frame line, first frame position line, first height waterline, second height waterline, and third height waterline according to the port side frame theoretical line diagram within this subsection, where the heights of the first height waterline, the second height waterline, and the third height waterline increase in sequence; S2. adding a first structural compensation amount to each frame line in the port frame theoretical line diagram along the height direction of the hull; S3, taking the intersection of the first rib position line and the adjusted second height waterline as the origin, gradually shifting the second height waterline toward the side along the ship length by a first reverse deformation amount as a step size to form a centerline of the tire frame after reverse deformation; S4, determining the distance from the rib line of each gear to the tire frame reference plane at the tire frame centerline; S5. In the height direction, all the rib lines in the region from the first height waterline to the keel bottom surface of the hull are gradually offset by a first set value toward the side to form a first inverse deformation line shape. All the rib lines in the region from the third height waterline to the deck sideline of the hull are gradually offset by the first set value toward the side to form a second inverse deformation line shape. The first inverse deformation line shape, the second inverse deformation line shape, and the rib lines between the first height waterline and the third height waterline form a rib line shape diagram. S6. Draw a port side outer plate positioning diagram based on the rib line drawing and the designed outer plate development diagram; S7. Acquire outer plate positioning data and structural line positioning data according to the port outer plate positioning diagram.

2. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S5, the intersection of the first rib position line and the first height waterline is used as the first reference point, and the first reference point is used as the base point to determine the offset of all the rib lines toward the side in the area from the first height waterline to the keel bottom surface of the hull.

3. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S5, the intersection of the first rib line and the third height waterline is used as the second reference point, and the offset of all the rib lines toward the side from the third height waterline to the deck edge line of the hull is determined using the second reference point as the base point.

4. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S5, the deck edge line is the intersection line between the lower end surface of the deck and the side of the hull.

5. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S6, the outer plate of the current section needs to be extended by a first welding shrinkage compensation amount in the length direction of the hull.

6. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 5, characterized in that: The first welding shrinkage compensation amount increases by 2 mm for every 600 mm.

7. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S7, the projection of the second height waterline on the tire frame reference plane is used as the X-axis, and the projection of the middle rib position line in the port shell plating alignment diagram on the tire frame reference plane is used as the Y-axis. The horizontal distance between the intersection of each longitudinal seam in the port shell plating alignment diagram on each rib position line and the X-axis, the arc length from the intersection to the Y-axis, and the distance from the intersection to the tire frame reference plane are measured to obtain the shell plating seam positioning data.

8. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 7, characterized in that: The tire frame reference plane is a horizontal plane 600 mm from the ground.

9. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 7, characterized in that: The positioning data of each structural line are formed according to the arc length from the intersection of each rib line and each structural line on the port shell positioning diagram to the X-axis.

10. The method for positioning the hull outer plate and drawing out its structural marking data according to claim 1, characterized in that: In step S5, the first set value is 5 mm.

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