Method for lofting hull plating positioning and structure scribe data thereof

Abstract

The present application relates to the technical field of shipbuilding, and especially relates to a hull plate positioning method and a structure line data lofting method thereof, which comprises the following steps: 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 left side rib theoretical line graph in the present section range; adding a first structure compensation amount to each rib line in the left side rib theoretical line graph along the height direction of the hull; forming a middle line of the reverse deformation mould; determining the distance from each rib line to the mould reference plane at the middle line of the mould; forming a rib line graph by a first reverse deformation line type, a second reverse deformation line type and the rib line between the first height waterline and the third height waterline; drawing a left side plate positioning graph according to the rib line graph and a designed plate development graph; and obtaining plate positioning data and structure line positioning data. The present application can effectively obtain plate positioning data and structure assembly positioning data of the welding shrinkage amount in the transverse and height direction regionalization.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a method for lofting out the positioning of hull plates and their structural marking data. Background Technology

[0002] Welding deformation during the construction of aluminum alloy ships is relatively greater than that of steel ships, making it difficult to control. This is especially true for the construction of the slender bow section, where appropriate welding shrinkage and counter-deformation must be applied to the template-type jig used in its fabrication to minimize welding deformation during section fabrication. This places high demands on the marking of the outer plating positioning and structural assembly positioning, which must account for the welding shrinkage and counter-deformation added during jig fabrication. However, the production data generated by typical shipbuilding systems is only applicable to cases with and without welding shrinkage along the length direction; it is not suitable for cases where welding shrinkage and counter-deformation are applied in sections along the transverse and height directions.

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

[0004] The purpose of this invention is to provide a method for laying out the positioning and structural marking data of the outer plate of a ship, which can effectively obtain the positioning data of the outer plate and the structural assembly positioning data of adding welding shrinkage in the lateral and height directions.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The method for laying out the positioning of the hull plating and its structural marking data includes the following steps:

[0007] S1. Using the port side manufacturing method, mark the rib line, first rib line, first height waterline, second height waterline and third height waterline according to the theoretical line diagram of the port side ribs within this section, wherein the heights of the first height waterline, the second height waterline and the third height waterline increase sequentially.

[0008] S2. Add a first structural compensation amount to each rib line in the theoretical line diagram of the port side rib along the height direction of the hull.

[0009] S3. Taking the intersection of the first rib line and the adjusted second height waterline as the origin, the second height waterline is gradually shifted toward the side of the ship along the ship length direction with the first anti-deformation amount as the step size to form the centerline of the frame after anti-deformation.

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

[0011] S5. In the height direction, all the rib lines in the area from the first waterline to the bottom of the keel of the hull are gradually offset towards the side by a first set value to form a first anti-deformation line shape. In the area from the third waterline to the deck edge of the hull, all the rib lines are gradually offset towards the side by the first set value to form a second anti-deformation line shape. The first anti-deformation line shape, the second anti-deformation line shape, and the rib lines located between the first waterline and the third waterline form a rib line shape diagram.

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

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

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

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

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

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

[0018] In some embodiments, the first welding shrinkage compensation is an increase of 2 mm for every 600 mm.

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

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

[0021] In some embodiments, the positioning data of each structural line is formed based on the arc length from the intersection of each rib line and each structural line on the port side outer plating positioning diagram to the X-axis.

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

[0023] The beneficial effects of this invention are:

[0024] The present invention provides a method for positioning hull plates and laying out structural marking data. Using a port-side manufacturing method, rib lines, the first rib position line, the first waterline, the second waterline, and the third waterline are marked according to the theoretical rib line diagram within the section. A first structural compensation amount is added to each rib line in the theoretical rib line diagram along the height direction of the hull. Taking the intersection of the first rib position line and the adjusted second waterline as the origin, the second waterline is gradually offset towards the side along the ship's length with a first anti-deformation amount as the step size to form the anti-deformed jig centerline. The distance from each rib line to the jig reference plane is determined based on the jig centerline. In the vertical direction, all rib lines within the area from the first waterline to the keel bottom of the hull are gradually offset towards the side by a first predetermined value to form a first anti-deformation line shape. Similarly, all rib lines within the area from the third waterline to the deck edge of the hull are gradually offset towards the side by a first predetermined value to form a second anti-deformation line shape. The first and second anti-deformation line shapes, along with the rib lines located between the first and third waterlines, form a rib line shape diagram. Based on the rib line shape diagram and the designed outer plating unfolded drawing, a port side outer plating positioning diagram is drawn. Outer plating positioning data and structural line positioning data are obtained from this diagram. Through this method, the first structural compensation amount and anti-deformation amount for welding deformation in the vertical direction, as well as the first anti-deformation amount in the width direction, are all included in the rib line shape diagram. This ensures the accuracy of the subsequently formed port side outer plating positioning diagram and guarantees the accurate acquisition of outer plating positioning and structural assembly positioning data for adding welding shrinkage in the transverse and vertical directions. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a flowchart of a method for positioning the outer plate of a ship and laying out its structural marking data according to the present invention.

[0027] Figure 2This is a layout diagram of the X and Y axes in the lofting method for positioning the outer plate of a ship and its structural marking data according to the present invention. Detailed Implementation

[0028] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0029] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0030] In this application, the terms "connection," "combination," "coupling," and "installation" can 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 the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0031] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0032] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0033] In the construction of aluminum alloy ships, in order to effectively obtain the positioning data of the outer plate and its structural assembly positioning for the addition of welding shrinkage in the lateral and vertical directions, such as... Figures 1-2 As shown, this invention provides a method for laying out the positioning and structural marking data of a ship's hull plating. The method for laying out the positioning and structural marking data of a ship's hull plating includes the following steps:

[0034] S1. Using the port side manufacturing method, mark the rib line, first rib line, first height waterline, second height waterline and third height waterline according to the theoretical line drawing of the port side rib within this section, wherein the height of the first height waterline, second waterline and third height waterline increases sequentially.

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

[0036] S3. Taking the intersection of the first rib line and the adjusted second height waterline as the origin, the second height waterline is gradually shifted towards the side of the ship along the length of the ship, with the first anti-deformation amount as the step size, to form the centerline of the frame after anti-deformation.

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

[0038] S5. In the height direction, all the rib lines in the area from the first waterline to the bottom of the keel of the hull gradually shift toward the side to form a first anti-deformation line shape, and all the rib lines in the area from the third waterline to the deck edge of the hull gradually shift toward the side to form a second anti-deformation line shape. The first anti-deformation line shape, the second anti-deformation line shape, and the rib lines located between the first waterline and the third waterline form a rib line shape diagram.

[0039] S6. Draw the port side outer plating positioning diagram based on the rib line drawing and the designed outer plating development drawing;

[0040] S7. Obtain the outer plate positioning data and structural line positioning data based on the port side outer plate positioning diagram.

[0041] In the above manner, the first structural compensation amount and the reverse deformation amount of 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 port side outer plate positioning diagram formed subsequently, and ensuring accurate acquisition of the outer plate positioning and structural assembly positioning data of adding welding shrinkage in the lateral and height directions in different areas.

[0042] In some embodiments, in step S5, the intersection of the first rib line and the first waterline is used as the first reference point. Using this first reference point as a reference, the offset of all rib lines towards the hull side within the area from the first waterline to the keel bottom surface of the hull is determined. Setting the first reference point facilitates adjustment of the rib line offsets, thereby ensuring the accuracy of the obtained first anti-deformation line shape.

[0043] In some embodiments, in step S5, the intersection of the first rib line and the third waterline is used as a second reference point. Using this second reference point as a reference, the offset of all rib lines towards the hull side within the area from the third waterline to the deck edge line is determined. Setting a second reference point facilitates adjustment of the rib line offset, thereby ensuring the accuracy of the obtained second anti-deformation line shape. In some embodiments, the first set value is 5mm. By pre-setting the anti-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 edge line is the intersection of the lower end face of the deck and the side of the hull. Since the lower end face of the deck is relatively flat and its installation position on the hull is relatively accurate, using the intersection of the lower end face of the deck and the side of the hull as the deck edge line can ensure the effective acquisition of the second anti-deformation line formed by the gradual offset of the rib line towards the side by a first set value, thus ensuring the accuracy of the second anti-deformation line.

[0045] In some embodiments, in step S6, the outer plate of this segment needs to be extended by a first welding shrinkage compensation amount along the length direction of the hull. Since the material will shrink to a certain extent after the hull is welded and cooled, by setting the first welding shrinkage compensation amount, compensation can be made in the length direction of the hull after the hull is welded and cooled, ensuring that the completed hull meets the length requirements and ensures the stability of the hull.

[0046] In some embodiments, the first weld shrinkage compensation amount is increased by 2mm for every 600mm. This method 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 according to the hull material and dimensions, without further limitations.

[0047] In some embodiments, in step S7, the projection of the second waterline on the jig reference plane is taken as the X-axis, and the projection of the center rib line in the port side outer plating positioning diagram on the jig reference plane is taken as the Y-axis. The horizontal distance from the intersection point of each longitudinal seam on each rib line to the X-axis, the arc length from the intersection point to the Y-axis, and the distance from the intersection point to the jig reference plane are measured to obtain the outer plating seam positioning data. This method accurately obtains the three-dimensional data of the intersection points of each longitudinal seam on each rib line, facilitating subsequent guidance for outer plating installation.

[0048] In some embodiments, the reference plane of the jig is a horizontal plane 600mm above the ground. This method ensures sufficient working space for construction personnel, facilitating their operations.

[0049] In some embodiments, the positioning data of each structural line is formed based on the arc length from the intersection of each rib line and each structural line on the port side outer plating positioning diagram to the X-axis. Since the outer plating has a certain degree of curvature, the positioning data of the structural lines can be accurately determined by measuring the arc length.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for laying out the positioning and structural marking data of a ship's hull plating, characterized in that, Includes the following steps: S1. Using the port side manufacturing method, mark the rib line, first rib line, first height waterline, second height waterline and third height waterline according to the theoretical line diagram of the port side ribs within this section, wherein the heights of the first height waterline, the second height waterline and the third height waterline increase sequentially. S2. Add a first structural compensation amount to each rib line in the theoretical line diagram of the port side rib along the height direction of the hull. S3. Taking the intersection of the first rib line and the adjusted second height waterline as the origin, the second height waterline is gradually shifted toward the side of the ship along the ship length direction with the first anti-deformation amount as the step size to form the centerline of the frame after anti-deformation. S4. Determine the distance from each rib line to the reference plane of the tire frame at the center line of the tire frame; S5. In the height direction, all the rib lines in the area from the first waterline to the bottom of the keel of the hull are gradually offset towards the side by a first set value to form a first anti-deformation line shape. In the area from the third waterline to the deck edge of the hull, all the rib lines are gradually offset towards the side by the first set value to form a second anti-deformation line shape. The first anti-deformation line shape, the second anti-deformation line shape, and the rib lines located between the first waterline and the third waterline form a rib line shape diagram. S6. Draw the port side outer plate positioning diagram based on the rib line drawing and the designed outer plate unfolding diagram; S7. Obtain the outer plate positioning data and structural line positioning data according to the port side outer plate positioning diagram; In step S7, the projection of the second height waterline onto the reference plane of the jig is taken as the X-axis, and the projection of the middle rib line in the port side outer plating positioning diagram onto the reference plane of the jig is taken as the Y-axis. The horizontal distance from the intersection point of each longitudinal seam on each rib line of the port side outer plating positioning diagram to the X-axis, the arc length from the intersection point to the Y-axis, and the distance from the intersection point to the reference plane of the jig are measured to obtain the outer plating seam positioning data.

2. The method for positioning the hull plating and laying out the structural marking data according to claim 1, characterized in that, In step S5, the intersection of the first rib line and the first waterline is taken as the first reference point, and the offset of all the rib lines toward the side is determined in the area from the first waterline to the bottom of the keel of the hull.

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

4. The method for positioning the hull plating and laying out the 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 face of the deck and the side of the hull.

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

6. The method for positioning the hull plating and laying out the structural marking data according to claim 5, characterized in that, The first welding shrinkage compensation is 2mm for every 600mm.

7. The method for positioning the hull plating and laying out the structural marking data according to claim 1, characterized in that, The reference plane of the jig is a horizontal plane 600mm above the ground.

8. The method for positioning the hull plating and laying out the structural marking data according to claim 1, characterized in that, 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 side outer plating positioning diagram to the X-axis.

9. The method for positioning the hull plating and laying out the structural marking data according to claim 1, characterized in that, In step S5, the first setting value is 5mm.

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