A method for installing curved panel markings at a segmented stage

Abstract

This invention relates to a method for installing markings on curved outer plates during segmentation. After the segmented structure containing the markings is welded, upper, lower, front, and rear boundary lines are drawn on the outer plate of the segment. The markings are then printed on polyester paper according to the dimensions of the markings on the outer plate. The polyester paper with the markings is then pasted along the outer plate of the segment. The position of the polyester paper is adjusted according to the upper, lower, front, and rear boundary lines, and it is held in place by magnets adsorbing it onto the outer plate of the hull. Positioning points for each marking are punched onto the outer plate of the segment using the markings on the polyester paper as a reference. Welding of the markings is then performed on the outer plate of the segment along the positioning points. This invention, by drawing boundary lines on the outer plate of the segment, confines the markings printed on the polyester paper within the boundary lines, achieving segmented installation, avoiding damage to the paint surface and high-altitude operations, and reducing the difficulty of positioning the markings on the outer plate of the segment during the segmentation stage.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and more specifically to a method for installing curved outer plate markings during the segmentation stage. Background Technology

[0002] During shipbuilding, relevant information, including the ship's name and port of registration, needs to be marked on the outer plating of the hull, typically using letters. Marking is usually done in the dry dock stage, using hydraulic jacks for installation at heights of tens of meters. The markings are generally fixed to the outer plating by welding, which may damage the already painted surface, and the work at height is relatively difficult. In the sectioning stage, because the hull is not yet fully formed, positioning the markings is more challenging. The outer plating area typically includes straight sections and linear sections. Positioning the markings in straight sections is relatively simple during the sectioning stage, but positioning them in linear sections presents greater difficulty. Summary of the Invention

[0003] To reduce the difficulty of positioning markings on curved outer panels during the segmentation stage, this invention provides a method for installing markings on curved outer panels during the segmentation stage. This method advances the installation of markings to the segmentation stage, avoiding damage to the painted surface of the outer panel and avoiding high-altitude operations.

[0004] The technical objective of this invention is achieved through the following technical solution:

[0005] A method for installing markings on a curved outer plate during segmentation, the method comprising the following steps:

[0006] Step 1: After the segment containing the letter to be marked is welded, scaffolding is erected along the outer plate line of the segment for marking the construction.

[0007] Step 2: Draw the outer plate marking installation diagram. The outer plate marking installation diagram includes the size, style, segment, starting point position of the marking letters, upper boundary height, lower boundary height, distance between marking letters, and width of marking letters. The starting point position of the marking letters is selected as the intersection of the horizontal line where the lower boundary height of the first marking letter on the segmented outer plate is located and the vertical line where the side boundary is located. Based on the outer plate marking installation diagram, determine the segment structure where each marking letter is located, determine the position of the starting point on the segment where the marking letter is located, measure the position coordinates of the starting point using a total station, punch a center punch, and mark the center punch point.

[0008] Step 3: Based on the upper and lower boundary heights of the marked letters, which have straight upper and lower edges, draw the upper and lower boundary lines extending horizontally along the outer plate of the segmented outer plate. The upper and lower boundary lines correspond to the upper and lower sides of the mark, respectively.

[0009] Step 4: Draw the front boundary line of the starting point on the outer plate perpendicular to the upper and lower boundary lines. Obtain the rear boundary line by measuring the width of the mark, perpendicular to the upper and lower boundary lines and parallel to the front boundary line.

[0010] Based on the dimensional information on the outer panel marking installation drawing, the front boundary line of the next mark is measured and determined using the rear boundary line of the adjacent previous mark as a reference, and the rear boundary line of the next mark is measured according to the width of the marking letter.

[0011] Complete the front and rear boundary lines of all adjacent marks on the outer plate of the same segment in sequence;

[0012] Step 5: Print the markings on polyester paper according to the dimensions marked on the outer plate. Paste the polyester paper with the markings along the segmented outer plate. Adjust the position of the polyester paper according to the upper boundary line, lower boundary line, front boundary line and rear boundary line. Press the polyester paper down on the outer plate of the ship by using magnets.

[0013] Step 6: Using the markings on the polyester paper as a reference, punch out the outline of each letter on the segmented outer plate, and then weld each letter on the segmented outer plate along the outline.

[0014] Furthermore, in step 5, for the marks on the same segmented outer plate, they are divided into groups of two adjacent marks, and the two letters in the same group are cut onto the same sheet of polyester paper.

[0015] Furthermore, if there is interference between the polyester paper and the scaffolding when the polyester paper is being pasted, the position of the scaffolding should be adjusted to avoid interference between the scaffolding and the polyester paper.

[0016] Furthermore, during the marking welding, if the marking crosses the segment joint, a 500mm gap is left on both sides of the segment joint without marking welding; if the marking extends within the 500mm range of the segment joint, the portion extending within the 500mm range of the segment joint is not welded.

[0017] Furthermore, the method also includes verifying the positions of the upper boundary line, lower boundary line, front boundary line, and rear boundary line, as well as verifying the position of the markings on the polyester paper according to the dimensional information in the outer panel marking installation drawing after the polyester paper is pasted.

[0018] Furthermore, after the polyester paper is applied, the distances of each mark on the polyester paper relative to the upper boundary line, lower boundary line, front boundary line, and rear boundary line are measured and compared with the position parameters on the outer panel marking installation diagram.

[0019] Compared with the prior art, the beneficial effect of the present invention is that by drawing upper boundary lines, lower boundary lines, front boundary lines and rear boundary lines on the segmented outer plate, the markings printed on polyester paper are limited to the range of the boundary lines, so as to realize the installation and welding of markings in the segmented stage, avoid high-altitude operations and damage to the paint surface of the outer plate, and reduce the difficulty of positioning the markings on the segmented outer plate in the segmented stage. Attached Figure Description

[0020] Figure 1 This is the outer plate marking installation diagram in this invention.

[0021] Figure 2 This is a schematic diagram of the boundary line marking on the segmented outer plate in this invention.

[0022] In the picture:

[0023] 1. Break; 2. Upper boundary line; 3. Lower boundary line; 4. Front boundary line; 5. Rear boundary line; 6. Starting point; 7. Segmented joint. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0025] A method for installing markings on a curved outer plate during segmentation, the method comprising the following steps:

[0026] Step 1: After the segment containing the letter to be marked is welded, scaffolding is erected along the outer plate line of the segment for marking the construction.

[0027] Step 2: Draw an installation diagram for the outer panel markings, such as... Figure 1 As shown, the outer panel marking installation diagram includes the size, style, segment, starting point position of the marking letters, upper boundary height, lower boundary height of the marking letters, distance between marking letters, and width of the marking letters. The starting point position of the marking letters is selected as the intersection of the horizontal line where the lower boundary height of the first marking letter on the segmented outer panel is located and the vertical line where the side boundary is located. In this embodiment, the four letters "A", "C", "G", and "M" are used as examples for illustration. The height of letters "A" and "M" is 1500mm, the height of letters "C" and "G" is 1513mm, the distance between letters "A" and "C" is 800mm, and the distance between letters "C", "G", and "M" is 300mm. The letter "A" is the first marking letter, and the starting point is the intersection of the horizontal line where the lower boundary height of the letter "A" is located and the vertical line where the side boundary is located.

[0028] Determine the segment structure where each marked letter is located based on the outer panel marking installation diagram, such as... Figure 2As shown, determine the position of the starting point 6 on the segment where the marked letter is located. After measuring the position coordinates of the starting point 6 with a total station, punch a sample punch and mark the sample punch point.

[0029] Step 3: Based on the upper and lower boundary heights of the marked letters whose top and bottom edges are both straight, draw upper boundary lines 2 and 3 extending horizontally along the outer panel's lines on the segmented outer panel. In this embodiment, the upper and lower edges of the letters "A" and "M" are both straight edges. The height of upper boundary line 2 is determined by the upper boundary height of the upper edge of "A" and "M", and the height of lower boundary line 3 is determined by the lower boundary height of the lower edge of "A" and "M". The upper and lower boundary lines correspond to the upper and lower sides of the marked letters, respectively. The letters "C", "G", "M", and "A" share the same upper and lower boundary lines. Since the height of letters "C" and "G" is higher than that of letter "A", the upper sides of letters "C" and "G" extend 13mm above the upper boundary line.

[0030] Step 4: Draw the front boundary line of the starting point on the outer plate perpendicular to the upper and lower boundary lines. Obtain the rear boundary line by measuring the width of the mark, perpendicular to the upper and lower boundary lines and parallel to the front boundary line.

[0031] Based on the dimensional information on the outer panel marking installation drawing, the front boundary line of the next mark is measured and determined using the rear boundary line of the adjacent previous mark as a reference, and the rear boundary line of the next mark is measured according to the width of the marking letter.

[0032] Complete the front and rear boundary lines of all adjacent marks on the outer plate of the same segment in sequence;

[0033] In this embodiment, taking the break 1 near the first letter in the bow-stern direction as a reference, the distance from the starting point 6 of the letter "A" to the break 1 can be determined by the installation diagram marked on the outer plate as 800mm. Starting from the reference, two points are obtained by measuring 800mm along the upper and lower boundary lines respectively. Connecting these two points gives the front boundary line 4 of the letter "A". The width of the letter "A" is 1600mm. Measure 1600mm along the front boundary line of the letter "A" and two points are measured on the upper boundary line 2 and lower boundary line 3. Connecting these two points gives the rear boundary line 5 of the letter "A".

[0034] Based on the 800mm spacing between the letters “C” and “A”, measure 800mm along the upper and lower boundary lines from the rear boundary line 5 of the letter “A” to determine the front boundary line 4 of the letter “C”. Then, measure the width of the letter “C” to determine the rear boundary line 5 of the letter “C”.

[0035] The front boundary line 4 and the back boundary line 5 of the letters "G" and "M" are determined by measuring the front and back boundary lines of the letter "C". All front boundary lines 4 and back boundary lines 5 are perpendicular to the upper boundary line 2 and the lower boundary line 3.

[0036] After determining all the upper boundary lines 2, lower boundary lines 3, front boundary lines 4, and rear boundary lines 5, the position coordinates of the intersection points of the boundary lines can be measured using a total station to verify whether the accuracy of the boundary lines meets the requirements.

[0037] When translating and measuring along the upper boundary line 2 and lower boundary line 3 on the outer panel, measurements can be taken using a total station or a measuring tape. However, measuring the upper boundary line 2 and lower boundary line 3 requires a total station. When measuring the upper and lower boundary lines, use the break at the lower or upper end of the segment as a reference. Using a total station, offset the measurements according to the dimensions on the outer panel's marked installation drawing to determine the positions of the upper and lower boundary heights of the letters "A" and "M" on the segmented outer panel. Alternatively, several points can be found between the positions of the upper and lower boundary heights of the letters "A" and "M," and these points can be connected to form the upper and lower boundary lines.

[0038] Step 5: Print the marked letters onto polyester paper according to the dimensions marked on the outer plate. Paste the polyester paper with the printed letters along the segmented outer plate. Adjust the position of the polyester paper according to the upper boundary line 2, lower boundary line 3, front boundary line 4, and rear boundary line 5, ensuring the marked letters are confined within the corresponding boundary lines. Secure the polyester paper to the outer plate using magnets. For marked letters on the same segmented outer plate, print adjacent marked letters as a group on the same sheet of polyester paper. Since polyester paper is usually sold in rolls, cut the two marked letters separately onto one sheet. For example, print the letters "G" and "M" according to their actual dimensions on polyester paper and cut them onto one sheet. When pasting the polyester paper, use the boundary lines of the two marked letters as a reference for positioning and adjustment to increase positioning accuracy.

[0039] When adjusting the position, the main focus is on ensuring that each marked letter is defined by the outer boundary line. For letters that extend beyond the boundary line, the length extending beyond the boundary line is measured to ensure accurate positioning. For example, if the upper part of the letter "C" extends 13mm beyond the upper boundary line, the positional accuracy of the letter "C" is determined by checking whether it extends 13mm beyond the upper boundary line.

[0040] After the polyester paper is affixed, the position of the markings on the polyester paper is verified according to the dimensional information in the outer panel marking installation diagram. The distance of each marking on the polyester paper relative to the upper boundary line, lower boundary line, front boundary line, and rear boundary line is measured and compared with the position parameters on the outer panel marking installation diagram.

[0041] If there is interference between the polyester paper and the scaffolding when applying it, adjust the position of the scaffolding to avoid interference. The scaffolding position adjustment can be planned and adjusted before the scaffolding is erected.

[0042] Step 6: Using the markings on the polyester paper as a reference, punch out the outline of each letter on the segmented outer plate. Then, weld each letter along the outline on the segmented outer plate. When welding, use a surfacing welding method to weld along the outline.

[0043] During marking welding, if the marking letter crosses the segment joint 7, a 500mm gap is left on both sides of the segment joint without marking welding. If the marking extends within the 500mm range of the segment joint 7, the portion extending within that 500mm range is not welded. In this embodiment, a portion of the letter "M" is located within 500mm of the segment joint. Therefore, when welding the letter "M," the portion within the 500mm range of the segment joint is temporarily left unwelded until the segments are joined or the docking stage is completed.

[0044] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for installing markings on a curved outer plate in a segmented stage, characterized in that, The method includes the following steps: Step 1: After the segment containing the letter to be marked is welded, scaffolding is erected along the outer plate line of the segment for marking the construction. Step 2: Draw the outer plate marking installation diagram. The outer plate marking installation diagram includes the size, style, segment, starting point position of the marking letters, upper boundary height, lower boundary height, distance between marking letters, and width of marking letters. The starting point position of the marking letters is selected as the intersection of the horizontal line where the lower boundary height of the first marking letter on the segmented outer plate is located and the vertical line where the side boundary is located. Based on the outer plate marking installation diagram, determine the segment structure where each marking letter is located, determine the position of the starting point on the segment where the marking letter is located, measure the position coordinates of the starting point using a total station, punch a center punch, and mark the center punch point. Step 3: Based on the upper and lower boundary heights of the marked letters, which have straight upper and lower edges, draw the upper and lower boundary lines extending horizontally along the outer plate of the segmented outer plate. The upper and lower boundary lines correspond to the upper and lower sides of the mark, respectively. Step 4: Draw the front boundary line of the starting point on the outer plate perpendicular to the upper and lower boundary lines. Obtain the rear boundary line by measuring the width of the mark, perpendicular to the upper and lower boundary lines and parallel to the front boundary line. Based on the dimensional information on the outer panel marking installation drawing, the front boundary line of the next mark is measured and determined using the rear boundary line of the adjacent previous mark as a reference, and the rear boundary line of the next mark is measured according to the width of the marking letter. Complete the front and rear boundary lines of all adjacent marks on the outer plate of the same segment in sequence; Step 5: Print the markings on polyester paper according to the dimensions marked on the outer plate. Paste the polyester paper with the markings along the segmented outer plate. Adjust the position of the polyester paper according to the upper boundary line, lower boundary line, front boundary line and rear boundary line. Press the polyester paper down on the outer plate of the ship by using magnets. Step 6: Using the markings on the polyester paper as a reference, punch out the outline of each letter on the segmented outer plate, and then weld each letter on the segmented outer plate along the outline.

2. The method for installing curved outer plate markings in segmented stages according to claim 1, characterized in that, In step 5, for the marks on the same segmented outer plate, they are divided into groups of two adjacent marks, and the two letters in the same group are cut onto the same sheet of polyester paper.

3. The method for installing curved outer plate markings in segmented stages according to claim 1, characterized in that, If there is interference between the polyester paper and the scaffolding when the polyester paper is being pasted, adjust the position of the scaffolding to avoid interference.

4. The method for installing curved outer plate markings in segmented stages according to claim 1, characterized in that, When marking and welding, if the mark crosses the segment joint, leave 500mm on both sides of the segment joint without marking and welding. If the mark extends within 500mm of the segment joint, then the part extending within 500mm of the segment joint will not be welded.

5. The method for installing curved outer plate markings in segmented stages according to claim 1, characterized in that, The method also includes verifying the positions of the upper boundary line, lower boundary line, front boundary line, and rear boundary line, as well as verifying the position of the markings on the polyester paper according to the dimensional information in the outer panel marking installation drawing after the polyester paper is pasted.

6. A method for installing curved outer plate markings in segmented stages according to claim 5, characterized in that, After the polyester paper is applied, measure the distance of each mark on the polyester paper relative to the upper boundary line, lower boundary line, front boundary line, and rear boundary line, and compare it with the position parameters on the outer panel marking installation diagram.

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