Method for installing curved-surface outer plate marks in segmentation stage

Abstract

The invention relates to a method for installing a curved-surface planking mark in a segmentation stage, which comprises the following steps of: completing welding of a segmentation structure where the mark is located, marking an upper boundary line, a lower boundary line, a front side boundary line and a rear side boundary line on a segmented planking, printing the mark on polyester paper according to the lofting size of the mark on the planking, the polyester paper printed with the marks is pasted along the segmented outer plates, the position of the polyester paper is adjusted according to the upper boundary line, the lower boundary line, the front side boundary line and the rear side boundary line, and magnets are attracted to the outer plates of the ship body to press the polyester paper; knocking out a positioning point punch of each mark on the segmented outer plate by taking the mark on the polyester paper as a reference; and carrying out marked welding operation on the segmented outer plates along the positioning points. According to the method, the boundary line is marked on the segmented outer plate, and the mark printed on the polyester paper is limited in the range of the boundary line, so that segmented stage installation is realized, paint surface damage and high-altitude operation are avoided, and the difficulty of positioning the mark on the segmented outer plate in the segmented stage is reduced.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and particularly to a method for installing curved outer plate markings in the sectional stage. Background Art

[0002] During the shipbuilding process, relevant information needs to be marked on the outer plate of the hull, including the ship name, port nationality name, etc., which are generally represented by letters. Generally, the marking is constructed in the dock stage. When installing the marking, a hydraulic truck is used for operation at high altitude, and the operation height can reach dozens of meters. The marking is generally fixed on the outer plate by welding. Therefore, the paint surface that has been completed may be damaged during the installation process, and the difficulty of high-altitude operation is relatively large. In the sectional stage, since the hull has not been formed yet, it is difficult to position the marking. The outer plate area usually includes a flat area and a curved area. The positioning in the flat area is relatively simple in the sectional stage, but it is difficult to position the marking in the curved area in the sectional stage. Summary of the Invention

[0003] In order to reduce the positioning difficulty of the marking at the curved outer plate in the sectional stage, the present invention provides a method for installing curved outer plate markings in the sectional stage, installing the marking in advance in the sectional stage, avoiding damage to the outer plate paint surface and avoiding high-altitude operation.

[0004] The technical object of the present invention is achieved by the following technical solutions:

[0005] A method for installing curved outer plate markings in the sectional stage, the method comprising the following steps:

[0006] Step 1, after the welding of the sectional structure where the marked letter is located is completed, a scaffolding is erected along the outer plate line of the section for marking construction;

[0007] Step 2, draw an outer plate marking installation drawing, which includes the size, style, section where the marked letter is located, starting point position of the marked letter, upper boundary height of the marked letter, lower boundary height, distance between marked letters, width of the marked letter; the starting point position of the marked letter is selected as the intersection of the horizontal line where the lower boundary height of the first marked letter on the sectional outer plate is located and the vertical line where the side boundary is located; determine the sectional structure where each marked letter is located according to the outer plate marking installation drawing, determine the position of the starting point on the section where the marked letter is located, measure the position coordinates of the starting point by a total station, then punch a center punch and mark the center punch point;

[0008] Step 3, draw an upper boundary line and a lower boundary line that extend horizontally along the outer plate line on the sectional outer plate according to the upper boundary height and the lower boundary height of the marked letter with both upper and lower edges being straight edges, and the upper boundary line and the lower boundary line respectively correspond to the upper side and the lower side of the marking;

[0009] Step 4: Draw the front boundary line of the mark where the starting point is located on the outer plate perpendicular to the upper boundary line and the lower boundary line, and measure along the parallel to the front boundary line perpendicular to the upper boundary line and the lower boundary line with the width of the mark to obtain the rear boundary line;

[0010] According to the dimension information on the outer plate mark installation drawing, measure and determine the front boundary line of the next mark based on the rear boundary line of the adjacent previous mark, and measure the rear boundary line of the next mark according to the width of the mark letter;

[0011] Successively complete the front boundary lines and rear boundary lines of all adjacent marks on the outer plate of the same section;

[0012] Step 5: Print the marks on the polyester paper according to the dimensions of the marks lofted on the outer plate, paste the polyester paper with the printed marks along the outer plate of the section, adjust the position of the polyester paper according to the upper boundary line, the lower boundary line, the front boundary line and the rear boundary line, and press the polyester paper against the outer plate of the ship by magnetic adsorption;

[0013] Step 6: Knock out the outline center punches of each mark letter on the outer plate of the section based on the marks on the polyester paper, and perform the welding operation of each mark letter along the outline center punches on the outer plate of the section.

[0014] Further, in Step 5, for the marks on the outer plate of the same section, divide them into groups with two adjacent marks as a group, and cut the two letters of the same group on the same piece of polyester paper.

[0015] Further, when pasting the polyester paper, if there is interference between the polyester paper and the scaffold, adjust the position of the scaffold to avoid interference between the scaffold and the polyester paper.

[0016] Further, when welding the marks, if the mark crosses the section joint, leave 500 mm on both sides of the section joint without welding the mark, and if the mark extends within 500 mm of the section joint, the part extending within 500 mm of the section joint is not welded.

[0017] Further, the method further includes verifying the positions of the upper boundary line, the lower boundary line, the front boundary line and the rear boundary line, and verifying the positions of the marks on the polyester paper according to the dimension information in the outer plate mark installation drawing after the polyester paper is pasted.

[0018] Further, after the polyester paper is pasted, measure the distances of the marks on each piece of polyester paper relative to the upper boundary line, the lower boundary line, the front boundary line and the rear boundary line, and compare them with the position parameters on the outer plate mark installation drawing.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows. By drawing upper boundary lines, lower boundary lines, front side boundary lines, and rear side boundary lines on the segmented outer plate, the marks printed on the polyester paper are limited within the range of the boundary lines, enabling the installation and welding of the marks during the segmentation stage, avoiding high-altitude operations and damage to the paint surface of the outer plate, and reducing the difficulty of positioning the marks on the segmented outer plate during the segmentation stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the installation drawing of the outer plate mark in the present invention.

[0021] Figure 2 is the schematic diagram of drawing the upper boundary line on the segmented outer plate in the present invention.

[0022] In the figure:

[0023] 1, fracture; 2, upper boundary line; 3, lower boundary line; 4, front side boundary line; 5, rear side boundary line; 6, starting point; 7, segmented joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

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

[0026] Step 1, after the welding of the segmented structure where the mark letters are located is completed, erect a scaffolding along the outer plate line type of the segment for mark construction;

[0027] Step 2, draw an installation drawing of the outer plate mark. As Figure 1 shown, the installation drawing of the outer plate mark includes the size, style, segment where the mark letters are located, starting point position of the mark letters, upper boundary height of the mark letters, lower boundary height of the mark letters, distance between the mark letters, and width of the mark letters; the starting point position of the mark letters is selected as the intersection of the horizontal line where the lower boundary height of the first mark letter on the segmented outer plate is located and the vertical line where the side boundary is located; in this embodiment, four letter marks of "A", "C", "G", and "M" are used as examples for illustration. The heights of both letters "A" and "M" are 1500 mm, the heights of both letters "C" and "G" are 1513 mm, the distance between letters "A" and "C" is 800 mm, and the distances between letters "C", "G", and "M" are all 300 mm. Letter A is the first mark letter, and the intersection of the horizontal line where the lower boundary height of letter "A" is located and the vertical line where the side boundary is located is used as the starting point.

[0028] Determine the segmented structure where each mark letter is located according to the installation drawing of the outer plate mark. As Figure 2As shown in the figure, 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 drift punch and mark the drift punch point.

[0029] Step 3: According to the upper boundary height and lower boundary height of the marked letters with straight upper and lower edges in the marked letters, draw the upper boundary line 2 and the lower boundary line 3 extending horizontally along the outer plate line type on the segmented outer plate. In this embodiment, the upper and lower edges of the letters "A" and "M" are both straight edges. The height position of the upper boundary line 2 is determined by the upper boundary height where the upper edges of the letters "A" and "M" are located, and the height position of the lower boundary line 3 is determined by the lower boundary height where the lower edges of the letters "A" and "M" are located. The upper boundary line and the lower boundary line respectively correspond to the upper and lower sides of the marked letters. The letters "C", "G" share the upper boundary line and the lower boundary line with "M", "A". Since the heights of the letters "C" and "G" are higher than that of the letter "A", the upper sides of the letters "C" and "G" are 13 mm higher than the upper boundary line.

[0030] Step 4: Draw the front side boundary line of the mark where the starting point is located on the outer plate perpendicular to the upper boundary line and the lower boundary line from the starting point, and measure the rear side boundary line along the parallel direction of the front side boundary line perpendicular to the upper boundary line and the lower boundary line with the width of the mark.

[0031] According to the dimension information on the outer plate mark installation drawing, measure and determine the front side boundary line of the next mark based on the rear side boundary line of the adjacent previous mark, and measure the rear side boundary line of the next mark according to the width of the marked letter.

[0032] Successively complete the front side boundary lines and rear side boundary lines of all adjacent marks on the outer plate of the same segment.

[0033] In this embodiment, with the break 1 near the first letter in the bow and stern direction as the reference, it can be determined from the outer plate mark installation drawing that the distance from the starting point 6 of the letter "A" to the break 1 is 800 mm. Measure 800 mm respectively along the upper boundary line and the lower boundary line from the reference to obtain two points, and connect these two points to obtain the front side boundary line 4 of the letter "A". The width of the letter "A" is 1600 mm. Measure 1600 mm along the front side boundary line of the letter "A" and measure two points on the upper boundary line 2 and the lower boundary line 3 and then connect them to obtain the rear side boundary line 5 of the letter "A".

[0034] Then, according to the spacing of 800 mm between the letter "C" and the letter "A", measure 800 mm along the upper boundary line and the lower boundary line with the rear side boundary line 5 of the letter "A" to determine the front side boundary line 4 of the letter "C", and then measure and determine the rear side boundary line 5 of the letter "C" according to the width of the letter "C".

[0035] Measure and determine the front boundary line 4 and the rear boundary line 5 of the letter "G" and the letter "M" according to the measurement methods of the front and rear boundary lines of the letter "C". All the front boundary lines 4 and the rear boundary lines 5 are perpendicular to the upper boundary line 2 and the lower boundary line 3.

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

[0037] When measuring and translating along the upper boundary line 2 and the lower boundary line 3 on the outer plate, it can be measured by a total station or a tape measure. However, the measurement of the upper boundary line 2 and the lower boundary line 3 needs to be carried out with the help of a total station. When measuring the upper and lower boundary lines, taking the break at the lower or upper end position of the segment as the reference, offset according to the dimension information on the outer plate marking installation drawing with the help of a total station, and determine the positions of the upper boundary height and the lower boundary height of the letters "A" and "M" on the segment outer plate. Several points can also be found between the positions of the upper boundary height of the letters "A" and "M" and between the positions of the lower boundary height, and the points are connected to form the upper and lower boundary lines.

[0038] Step 5: Print the marked letters on the polyester paper according to the dimensions marked and lofted on the outer plate. Paste the polyester paper with the printed marked letters along the outer plate of the segment. Adjust the position of the polyester paper according to the upper boundary line 2, the lower boundary line 3, the front boundary line 4 and the rear boundary line 5, so that the marked letters are limited within the corresponding boundary lines, and press the polyester paper on the outer plate of the ship by magnetic adsorption; for the marked letters on the same segment outer plate, print two adjacent marked letters on the same piece of polyester paper. Specifically, since the polyester paper usually exists in rolls, when cutting, two marked letters are cut and divided on the same piece of polyester paper. For example, the letters "G" and "M" are printed and cut on the same piece of polyester paper according to the actual dimensions. When pasting the polyester paper, position and adjust according to the boundary lines of the two marked letters, which can increase the positioning accuracy.

[0039] When adjusting the position, mainly ensure that each marked letter is limited by the outer circle of boundary lines. For the letters that exceed the boundary lines, measure the length that exceeds the boundary lines to ensure the accurate position. For example, the upper side of the letter "C" exceeds the upper boundary line by 13 mm, and judge the position accuracy of the letter "C" by checking whether it exceeds the upper boundary line by 13 mm along the upper boundary line.

[0040] After the polyester paper is pasted, verify the positions of the marks on the polyester paper according to the dimension information in the outer plate marking installation drawing. Measure the distances of the marks on each polyester paper from the upper boundary line, lower boundary line, front side boundary line, and rear side boundary line, and compare them with the position parameters on the outer plate marking installation drawing.

[0041] When pasting the polyester paper, if there is interference between the polyester paper and the scaffold, adjust the position of the scaffold to avoid interference between the scaffold and the polyester paper. The position adjustment of the scaffold can be planned and adjusted before the scaffold is erected.

[0042] Step 6: Using the marks on the polyester paper as a reference, punch out the outline center punches of each marked letter on the sectional outer plate, and perform the welding operation of each marked letter on the sectional outer plate along the outline center punches. When welding, use the surfacing method to perform the welding operation along the outline.

[0043] When welding the marks, if the marked letter crosses the sectional joint 7, leave 500 mm on both sides of the sectional joint without welding the marks. If the mark extends within the 500 mm range of the sectional joint 7, the part within the 500 mm range of the sectional joint will not be welded. In this embodiment, part of the letter "M" is located within the 500 mm range from the sectional joint. When welding the letter "M", the area that exists within the 500 mm range of the sectional joint will not be welded temporarily, and supplementary welding will be carried out after the sectional closure or at the dock stage.

[0044] This embodiment is only a further explanation of the present invention and not a limitation thereof. Those skilled in the art can make non-creative modifications to this embodiment as needed after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A method for installing curved outer panel markings in segmented stages, characterized in that: The method comprises the following steps: Step 1: After the welding of the segmented structure where the letter is located is completed, a scaffold is set up along the outer plate line of the segment to mark the construction; Step 2, draw the outer plate marking installation diagram, the outer plate marking installation diagram includes the size, style, segmentation, starting point position of the marking letter, upper boundary height of the marking letter, lower boundary height, distance between marking letters, width of the marking letter; the starting point position of the marking letter 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; determine the segment structure where each marking letter is located according to the outer plate marking installation diagram, determine the position of the starting point on the segment where the marking letter is located, measure the position coordinates of the starting point by a total station, and then punch and mark the punch point; Step 3, according to the upper boundary height and the lower boundary height of the marking letter in which both the upper and lower edges are straight edges, draw the upper boundary line and the lower boundary line extending in the horizontal direction along the outer plate line on the segmented outer plate, and the upper boundary line and the lower boundary line correspond to the upper side and the lower side of the marking respectively; Step 4: Draw a front boundary line on the outer plate at the starting point perpendicular to the upper boundary line and the lower boundary line, and draw a rear boundary line perpendicular to the upper boundary line and the lower boundary line and parallel to the front boundary line with the width of the mark; According to the dimension information on the installation drawing of the outer plate mark, the front side boundary line of the next mark is measured based on the rear side boundary line of the adjacent previous mark, and the rear side boundary line of the next mark is measured according to the width of the mark letter; Complete all adjacent marked front and rear boundary lines on the outer plate of the same section in sequence; Step 5: Print the mark on the polyester paper according to the size of the mark on the outer plate, and post the polyester paper with the mark along the segmented outer plate, adjust the position of the polyester paper according to the upper boundary line, the lower boundary line, the front boundary line and the rear boundary line, and press the polyester paper on the outer plate of the hull by adsorbing it with a magnet; Step 6: Use the mark on the polyester paper as a reference to punch out the outline of each marked letter on the segmented outer panel, and perform welding operations on each marked letter on the segmented outer panel along the outline.

2. A method for installing curved outer panel markings in segmented stages according to claim 1, characterized in that: In step 5, the marks on the same segment outer panel are divided into two adjacent marks as a group, and the two letters in the same group are cut on the same polyester paper.

3. A method for installing curved outer panel markings in segmented stages according to claim 1, characterized in that: When posting polyester paper, if there is interference between the polyester paper and the scaffolding, adjust the position of the scaffolding to avoid interference between the scaffolding and the polyester paper.

4. A method for installing curved outer panel markings in segmented stages according to claim 1, characterized in that: During marking welding, if the mark crosses the segmented seam, 500mm will be retained on both sides of the segmented seam without marking welding; if the mark extends within 500mm of the segmented seam, the part extending within 500mm of the segmented seam will not be welded.

5. A method for installing curved outer panel markings in segmented stages according to claim 1, characterized in that: The method also includes checking the positions of the upper boundary line, the lower boundary line, the front boundary line and the rear boundary line, and checking the position of the mark on the polyester paper according to the size information in the outer panel mark installation diagram after the polyester paper is pasted.

6. A method for installing curved outer panel markings in segmented stages according to claim 5, characterized in that: After the polyester paper is pasted, measure the distance between the mark on each polyester paper and the upper boundary line, lower boundary line, front boundary line and rear boundary line, and compare them with the position parameters on the outer panel mark installation drawing.

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