A method for repairing the curved surface of the ship's outer plate

Abstract

The present invention relates to the technical field of ship repair, and specifically to a method for repairing the curved surface of the ship's outer plate. In the repair of the damaged outer plate of a ship, usually one side of the outer plate is severely damaged, while the symmetrically opposite side is basically not damaged. In the case of lacking the line type data of the damaged area of the original ship, the traditional method is to knock out an iron cage pattern, and then make a repair plate according to the shape of the iron cage pattern, which is time-consuming and laborious, and the accuracy is not high enough. Compared with the prior art, the present invention does not need to knock out the traditional iron cage pattern, and can perform computerized lofting after fitting curves in the CAD environment, which is convenient and fast, and has relatively high accuracy. It saves repair time, material costs and labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of ship repair, and particularly to a method for repairing the curved surface of the ship's outer plate. Background Art

[0002] In the repair of the damaged outer plate of a ship, often one side of the outer plate is severely damaged, while the symmetrical other side is basically not damaged. In the case of lacking the line type data of the damaged area of the original ship, the traditional method is to knock out an iron cage-like shape and then make a repair plate according to the shape of the iron cage-like shape, which is time-consuming and laborious and has insufficient accuracy. Summary of the Invention

[0003] The present invention aims to overcome the deficiencies of the prior art and provides a method for repairing the curved surface of the ship's outer plate.

[0004] To achieve the above object, a method for repairing the curved surface of the ship's outer plate is designed, which is characterized by including the following steps:

[0005] S1: Weld column one, column two, and column three around the intact area of the outer plate symmetrical to the damaged area on the other side of the ship;

[0006] S2: Connect column one and column two with wire one, connect column one and column three with wire two, and connect column two and column three with wire three;

[0007] S3: Fix one end of wire four on column one, and the other end crosses wire three and connects with column four. Wire four just touches wire three to obtain the height of column four, and column four is welded on the intact area of the outer plate;

[0008] S4: Connect column two and column four with wire five, and connect column three and column four with wire six;

[0009] S5: Divide wire one, wire two, wire five, and wire six into N equal parts and make marks at the N equal division points;

[0010] S6: Connect the corresponding N equal division points between wire one and wire six and the corresponding N equal division points between wire two and wire five with lines, and obtain the intersection points between the lines;

[0011] S7: Measure the height values between the N equal division points and the intersection points and the intact area of the outer plate;

[0012] S8: Perform fitting lofting on the curved surface in CAD;

[0013] S9: Process the outer plate for repair according to the mirrored curved surface;

[0014] S10: Patch the damaged area.

[0015] The step S8 includes the following steps:

[0016] S8-1: Establish a plane. Take the position of Column 2 as the origin, the length of Wire 5 as the base of the triangle, draw arcs with the lengths of Wire 1 and Wire 4 as the radii respectively, and the arcs intersect at the position of Column 1. Draw arcs with the lengths of Wire 3 and Wire 6 as the radii respectively, and the arcs intersect at the position of Column 3.

[0017] S8-2: Divide the lines connecting the position of Column 2 and the position of Column 1, the position of Column 2 and the position of Column 4, the position of Column 3 and the position of Column 1, and the position of Column 3 and the position of Column 4 into N equal parts to obtain N equal division points.

[0018] S8-3: Connect the N equal division points of the opposite line segments and obtain the intersection points.

[0019] S8-4: Measure the height values of each intersection point through each equal division point and intersection point.

[0020] S8-5: Fit the intersection points of each section with a spline curve to obtain the outer plate curve.

[0021] S8-6: Mirror the outer plate curve and perform lofting of the outer plate and the structure.

[0022] The said Column 1, Column 2, and Column 3 are round steel bars with a diameter of 16 mm and a height of 500 mm.

[0023] In step S2, the minimum distances between Wire 1, Wire 2, Wire 3 and the ship's outer plate are greater than 50 mm.

[0024] When measuring the height in step S7, measure perpendicular to the plane formed by Wire 1, Wire 2, Wire 5, and Wire 6.

[0025] Compared with the prior art, the present invention does not need to knock the traditional iron cage pattern. It can perform computerized lofting after fitting the curve in the CAD environment, which is convenient, fast, and has relatively high precision. It saves repair time, material cost, and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the measurement connection lines of the present invention.

[0027] Figure 2 It is a schematic diagram of the wire connection.

[0028] Figure 3 It is a schematic diagram of the height measurement.

[0029] Figure 4 It is a schematic diagram of S8-1.

[0030] Figure 5 It is a schematic diagram of S8-2.

[0031] Figure 6Schematic diagram of S8-3.

[0032] Figure 7 Schematic diagram of S8-4.

[0033] Figure 8 Schematic diagram of S8-5.

[0034] Figure 9 Schematic diagram of S8-6.

[0035] Figure 10 Schematic diagram of CAD fitting solid.

[0036] See Figures 1-9 , where 1 is the intact area of the outer plate, 2 is the damaged area of the outer plate on the other side, 3 is the first column, 4 is the second column, 5 is the third column, 6 is the fourth column, 7 is the first wire, 8 is the second wire, 9 is the third wire, 10 is the fourth wire, 11 is the fifth wire, and 12 is the sixth wire. Embodiment Example

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] A method for repairing the curved surface of a ship's outer plate, characterized by comprising the following steps:

[0039] S1: Weld the first column 3, the second column 4, and the third column 5 around the intact area 1 of the outer plate symmetric to the damaged area 2 of the outer plate on the other side of the ship, as Figure 1 shown. The first column 3, the second column 2, and the third column 4 are welded around the intact area on the opposite side of the damaged area of the outer plate, leaving a position for the fourth column 6;

[0040] S2: Connect the first column 3 and the second column 4 with the first wire 7, connect the first column 3 and the third column 5 with the second wire 8, and connect the second column 4 and the third column 5 with the third wire 9, as Figure 2 shown. The wires are connected to the tops of the columns. The three columns form a plane at three points. The lowest point of the wire shall not contact the outer plate to avoid affecting the plane and the measured height;

[0041] S3: Fix one end of the fourth wire 10 on the first column 3, and connect the other end across the third wire 9 to the fourth column 6. The fourth wire 10 just touches the third wire 9 to obtain the height of the fourth column 6. The fourth column 6 is welded on the intact area 1 of the outer plate, as Figure 1 shown. The fourth wire 10 just touches the third wire 9 to make the fourth column 6 and the first to third columns in the same plane. The first to fourth columns surround the intact area on the opposite side of the damaged area of the outer plate;

[0042] S4: Connect the second column 4 and the fourth column 6 with the fifth steel wire 11, and connect the third column 5 and the fourth column 6 with the sixth steel wire 12. The first steel wire 7, the second steel wire 8, the fifth steel wire 11, and the sixth steel wire 12 form a quadrilateral in the same plane;

[0043] S5: Divide the first steel wire 7, the second steel wire 8, the fifth steel wire 11, and the sixth steel wire 12 into N equal parts, and make marks at the N equal division points. In this embodiment, taking three equal divisions as an example, as Figure 1 shown, the three equal division points of the first steel wire 7 are a and b, the three equal division points of the fifth steel wire 11 are c and d, the three equal division points of the sixth steel wire 12 are e and f, and the three equal division points of the second steel wire 7 are g and h;

[0044] S6: Connect the relative N equal division points between the first steel wire 7 and the sixth steel wire 12 and the relative N equal division points between the second steel wire 8 and the fifth steel wire 11 with lines, and obtain the intersection points between the lines. As Figure 1 shown, connect af, be, ch, and dg with lines, and obtain the intersection point X1 of af and ch, the intersection point X2 of be and ch, the intersection point X3 of be and dg, and the intersection point X4 of af and dg;

[0045] S7: Measure the height values of the N equal division points and the intersection points from the intact area 1 of the outer plate. As Figure 3 shown, vertically measure the heights of points a~h and X1~X4;

[0046] S8: Fit and loft the curved surface in CAD to obtain the approximate curved surface of the outer plate within the measurement area;

[0047] S9: Manufacture the outer plate for repair according to the mirrored curved surface for repairing the ship's outer plate;

[0048] S10: Patch the damaged area to complete the repair of the ship's outer plate curved surface.

[0049] Step S8 includes the following steps:

[0050] S8-1: Establish a plane. Taking the position of the second column 4 as the origin, the length of the fifth steel wire 11 as the base of the triangle, draw arcs with the lengths of the first steel wire 7 and the fourth steel wire 10 as the radii respectively, and intersect at the position of the first column 3. Draw arcs with the lengths of the third steel wire 9 and the sixth steel wire 12 as the radii, and intersect at the position of the third column 5. As Figure 4 shown, draw the positions of the first to fourth columns in CAD;

[0051] S8-2: Divide the connection line between the position of the second column 4 and the position of the first column 3, the connection line between the position of the second column 4 and the position of the fourth column 6, the connection line between the position of the third column 5 and the position of the first column 3, and the connection line between the position of the third column 5 and the position of the fourth column 6 into N equal parts to obtain N equal division points. As Figure 5 shown, obtain points a~h;

[0052] S8-3: Connect the N-equal division points of the line segment on the opposite side and obtain the intersection points, as Figure 6 shown to obtain X1~X4;

[0053] S8-4: Measure the height values of each intersection point through each N-equal division point and intersection point, as Figure 7 shown to measure the heights of Column 1~4, a~h, and X1~X4;

[0054] S8-5: Fit the intersection points of each section with a spline curve to obtain the outer plate curve, as Figure 8 shown to fit each height point into a curve;

[0055] S8-6: Mirror the outer plate curve, perform lofting of the outer plate and the structure to obtain the outer plate surface, as Figure 9 shown to mirror the outer plate curve, Figure 10 which is a schematic diagram of the surface.

[0056] Column 1 3, Column 2 4, and Column 3 5 are round steel bars with a diameter of 16 mm and a height of 500 mm.

[0057] In step S2, the minimum distance between the first steel wire 7, the second steel wire 8, and the third steel wire 9 and the ship's outer plate is greater than 50 mm. It is convenient to measure the distance with tools.

[0058] When measuring the height in step S7, measure perpendicularly to the plane formed by the first steel wire 7, the second steel wire 8, the fifth steel wire 11, and the sixth steel wire 12 to obtain accurate height data.

[0059] In the case of lacking the line type data of the damaged area of the original ship, the present invention measures the line type of the undamaged side of the outer plate on-site and performs mirror processing to restore the outer plate on the damaged side. This method can be carried out on the water or in the dock. By fitting the measured distance and height values in the CAD environment to obtain an approximate surface and then mirroring it, it is very convenient to carry out the lofting work of the structure and the outer plate related to the damaged area. There is no need to knock the traditional iron cage pattern, which is convenient and fast and has relatively high accuracy. It saves repair time, material cost, and labor cost.

Claims

1. A method for repairing the curved surface of a ship's outer plate, characterized in that, It includes the following steps: S1: Weld column one (3), column two (4) and column three (5) around the intact outer plate area (1) symmetrical to the damaged area (2) of the outer plate on the other side of the ship; S2: Connect column one (3) and column two (4) with wire one (7), connect column one (3) and column three (5) with wire two (8), and connect column two (4) and column three (5) with wire three (9); S3: Fix one end of wire four (10) on column one (3), and the other end crosses wire three (9) to connect with column four (6). Wire four (10) just touches wire three (9) to obtain the height of column four (6), and column four (6) is welded on the intact outer plate area (1); S4: Connect column two (4) and column four (6) with wire five (11), and connect column three (5) and column four (6) with wire six (12); S5: Divide wire one (7), wire two (8), wire five (11), and wire six (12) into N equal parts and make marks at the N-equal division points; S6: Connect the opposite N-equal division points between wire one (7) and wire six (12) and the opposite N-equal division points between wire two (8) and wire five (11) with lines, and obtain the intersection points between the lines; S7: Measure the height values between the N-equal division points and the intersection points and the intact outer plate area (1); S8: Perform fitting lofting on the curved surface in CAD; S9: Manufacture the outer plate for repair according to the mirrored curved surface; S10: Patch the damaged area; Step S8 includes the following steps: S8-1: Establish a plane. Taking the position of column two (4) as the origin and the length of wire five (11) as the base of the triangle, draw arcs with the lengths of wire one (7) and wire four (10) as the radii respectively, intersecting at the position of column one (3). Draw arcs with the lengths of wire three (9) and wire six (12) as the radii, intersecting at the position of column three (5); S8-2: Divide the lines connecting the position of column two (4) and the position of column one (3), the line connecting the position of column two (4) and the position of column four (6), the line connecting the position of column three (5) and the position of column one (3), and the line connecting the position of column three (5) and the position of column four (6) into N equal parts to obtain N-equal division points; S8-3: Connect the N-equal division points of the opposite line segments and obtain the intersection points; S8-4: Measure the height values of each intersection point through each N-equal division point and intersection point; S8-5: Fit the intersection points of each section with a spline curve to obtain the outer plate curve; S8-6: Mirror the outer plate curve and perform lofting of the outer plate and structure.

2. The repair method of the curved surface of the ship's outer plate according to claim 1, characterized in that: The column one (3), column two (4), and column three (5) are round steel with a diameter of 16 mm and a height of 500 mm.

3. A method for repairing the curved surface of the ship's outer plate according to claim 1, characterized in that: In step S2, the minimum distance between wire one (7), wire two (8), wire three (9) and the ship's outer plate is greater than 50 mm.

4. A method for repairing the curved surface of the ship's outer plate according to claim 1, characterized in that: When measuring the height in step S7, measure perpendicularly to the plane formed by wire one (7), wire two (8), wire five (11), and wire six (12).

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