Middle assembly positioning method for curved outer plate

Abstract

The invention provides a curved shell plate middle assemblage positioning method, which comprises the following steps of: firstly, providing a sectional jig frame, and determining a shell plate datum line half-width value and a deck datum line half-width value according to a sectional lower opening theoretical half-width value of the sectional jig frame, the width of a lower opening T row and a lower opening reverse deformation amount; then, a deck datum line is surveyed in the deck assembly, and a deck half-width position line perpendicular to the rib position line is surveyed on each gear of rib position line; then, an outer plate datum line correspondingly consistent with the deck datum line is surveyed on an assembly in the outer plate, and the half-width position of the outer plate is surveyed on the rib plate; next, the deck middle assemblage is adjusted to be horizontal to the assembling position. And then the outer plate datum line and the deck datum line are adjusted to be aligned at the end points in the same direction. And finally, the outer plate is adjusted until the marked half-width position of the outer plate is located on the normal line of the assembly in the deck, and the normal line passes through the intersection point of the half-width position line of the deck and the rib position line. The assembling and positioning method in the curved outer plate can be automatically completed at a time, and time, manpower and material resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of ship curved segmentation, and in particular to an assembly positioning method for a curved outer plate. Background Art

[0002] In recent years, with the rapid development of the domestic shipbuilding industry, the accuracy of shipbuilding has been significantly improved. However, in the construction process of complex ship structures, especially curved sections (such as the curved outer plate of the hull), accuracy control is still a difficult problem. Curved sections have a great impact on the overall performance and service life of the ship due to their complex shapes and high dimensional accuracy requirements. Therefore, how to quickly and accurately build curved sections has become the focus of shipbuilding companies.

[0003] At present, major shipbuilding companies generally divide the curved sections into straight deck middle assembly and curved outer plate middle assembly, and then put them together. When the two middle assemblies are put together, the positioning accuracy of the outer plate middle assembly cannot be guaranteed due to the large outer plate line shape. At present, the pre-positioning method is usually adopted, and then the positioning accuracy of the outer plate is determined by total station detection, and then the positioning is corrected according to the detection data to complete the positioning work. According to the current positioning method, scaffolding needs to be set up after the initial positioning, and then the positioning is adjusted according to the data after the total station detection and analysis. This process takes at least two days to cut materials, which is long and costly. Summary of the invention

[0004] In view of the above shortcomings of the prior art, an object of the present invention is to provide a method for assembling and positioning a curved outer panel, so as to effectively reduce the time for assembling and positioning, and reduce manpower and material resources.

[0005] In order to achieve the above-mentioned object and other related objects, the present invention provides a method for assembling and positioning a curved outer panel, comprising:

[0006] Provide a segmented tire frame, and determine the shell plate reference line half-width value and deck reference line half-width value according to the segmented lower opening theoretical half-width value of the segmented tire frame, the width of the lower opening T row and the lower opening reverse deformation amount;

[0007] Draw the deck reference line on the deck assembly and draw the deck half-width position line perpendicular to the frame line on each frame line according to the half-width value of the deck reference line;

[0008] Mark the shell plating reference line corresponding to the deck reference line on the shell plating mid-assembly, and mark the shell plating half-width position on the ribs of the shell plating mid-assembly according to the half-width value of the shell plating reference line;

[0009] Adjust the deck assembly to the level of the assembly position;

[0010] Adjust the outer plate reference line and the deck reference line to align their end points in the same direction;

[0011] Adjust the shell plating until the marked half-width position of the shell plating is located on the normal line assembled in the middle of the deck, and the normal line passes through the intersection of the deck half-width position line and the rib position line.

[0012] Optionally, the half-width value Y' of the outer panel reference line is between (YX) and Y, in mm, wherein Y is the half-width value of the segmented lower opening, in mm, and X is the width of the lower opening T row, in mm.

[0013] Optionally, the deck reference line half-width value Y'' is obtained by the following formula:

[0014] Y''=Y'+Z

[0015] Among them, Y'' is in mm; Z is the reverse deformation of the lower mouth, in mm.

[0016] Optionally, the deck reference line is parallel to the rib position line in the deck mid-assembly, the distance between the deck reference line and one side edge of the deck mid-assembly parallel to the rib position line is between 100mm and 200mm, the length of the deck half-width position line is greater than the thickness of the rib plate, and the rib plate is arranged at the rib position line in the deck mid-assembly.

[0017] Optionally, the outer plate reference line and the deck reference line are arranged in one-to-one correspondence, the outer plate reference line is parallel to the rib position line in the outer plate middle assembly, and the distance between the outer plate reference line and one side edge of the outer plate middle assembly parallel to the rib position line is between 100mm and 200mm.

[0018] Optionally, after adjusting the outer plate reference line and the deck reference line to align their end points in the same direction, the deck and the outer plate are connected.

[0019] Optionally, the deck and the outer plate are connected by tongue and groove.

[0020] Optionally, the segmented tire frame is placed on a horizontal surface.

[0021] Optionally, the positions of the deck half-width position line and the marked outer plate half-width position are adjusted using a vertical beam emitted by a level.

[0022] Optionally, the intersection of the deck half-width position line and the rib position line and the marked outer plate half-width position are all located on the vertical light beam emitted by the level, and the positioning is completed.

[0023] As described above, the method for assembling and positioning a curved outer panel provided by the present invention has at least the following beneficial technical effects:

[0024] The method for positioning the curved outer plate assembly of the present invention first provides a segmented tire frame, and determines the outer plate reference line half-width value and the deck reference line half-width value according to the segmented lower opening theoretical half-width value of the segmented tire frame, the width of the lower opening T row and the lower opening reverse deformation amount. Then, the deck reference line is marked on the deck assembly, and the deck half-width position line perpendicular to the rib position line is marked on each rib position line according to the half-width value of the deck reference line. Next, an outer plate reference line corresponding to the deck reference line is marked on the outer plate assembly, and the outer plate half-width position is marked on the rib plate of the outer plate assembly according to the half-width value of the outer plate reference line. The next step is to adjust the deck assembly to the level of the assembly position. Then, the outer plate reference line and the deck reference line are adjusted to align the endpoints in the same direction to ensure that the outer plate assembly and the deck assembly can maintain the correct relative position during the subsequent assembly and welding process. Finally, adjust the outer plate until the half-width position of the marked outer plate is located at the normal line of the deck assembly, and the normal line passes through the intersection of the deck half-width position line and the rib position line, and further position the outer plate assembly and the deck assembly to make the positioning more accurate. The method for positioning the curved outer plate assembly of the present invention can be completed autonomously at one time without the need to set up scaffolding. The deviation can be observed standing on the deck, and continuous construction can be achieved, reducing the downtime waiting time for scaffolding, saving time and manpower and material resources. At the same time, there is no need for high-altitude detection, which increases safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a schematic flow chart of an assembly and positioning method for a curved outer panel in an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram showing the positions after the outer plate mid-assembly and the deck mid-assembly are positioned in an embodiment of the present invention.

[0027] Figure 3 Shown is a top view of the assembly in the deck in an embodiment of the present invention.

[0028] Figure 4 Shown is an assembled top view of the outer panel in an embodiment of the present invention.

[0029] Figure 5 Shown is a schematic diagram of the half-width position mark of the outer plate in an embodiment of the present invention.

[0030] Figure 6 Shown is a schematic diagram of half-width position positioning in an embodiment of the present invention.

[0031] Reference numerals

[0032] 1. Deck mid-assembly; 11. Deck reference line; 12. Deck half-width position line; 13. Longitudinal line; 14. Rib position line; 2. Shell plating mid-assembly; 21. Shell plating reference line; 22. Shell plating half-width position; 23. Ribs; 24. Shell plating; 231. Lower T row; 3. Normal line. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.

[0035] As a key component of ship structure, curved sections have complex and varied shapes and extremely high dimensional accuracy requirements, which are directly related to the overall streamline, navigation efficiency, structural strength and service life of the ship. Therefore, how to efficiently and accurately build these curved sections is not only a test of the technical strength of shipbuilding companies, but also the key to improving the market competitiveness of ship products.

[0036] At present, when making curved sections, major domestic shipbuilding companies generally adopt the method of splitting them into a straight middle assembly of the deck and a middle assembly of the curved outer plate, and then assembling them together for construction. However, in this process, due to the large linear shape of the curved outer plate, the positioning accuracy of the middle assembly when closing is difficult to guarantee. In order to meet this challenge, companies usually adopt a pre-positioning method, that is, the middle assembly is roughly placed in place through preliminary positioning, and then high-precision measuring equipment such as total stations are used for testing to determine the actual accuracy of the outer plate positioning. Based on the data obtained from the test, the technicians will make corresponding corrections to the positioning until the design requirements are met.

[0037] However, this traditional process has many shortcomings. First, after the initial positioning, scaffolding needs to be set up for total station detection, which not only increases the difficulty and cost of construction, but also prolongs the construction period. Secondly, the process of adjusting the positioning according to the data after detection and analysis often requires multiple iterations, further increasing the time and labor costs. It is estimated that it will take at least 2 days to complete the positioning of the curved segments in the current way, which is undoubtedly a huge challenge for ship companies pursuing efficient production and rapid delivery.

[0038] In order to solve the above problems, the present invention provides an assembly positioning method for a curved outer panel, which is now described in detail in conjunction with the following embodiments and drawings.

[0039] This embodiment provides a method for assembling and positioning a curved outer panel. Figure 1 , the method comprises the following steps:

[0040] S100: providing a segmented tire frame, and determining a shell plate reference line half-width value and a deck reference line half-width value according to a segmented lower opening theoretical half-width value of the segmented tire frame, a width of a lower opening T row, and a lower opening reverse deformation amount;

[0041] Provide segmented tire frames according to the drawing requirements, and adjust the segmented tire frames until their level and ground line meet the drawing requirements. Figure 6 As shown in the figure, the shell plate reference line half-width value and the deck reference line half-width value are determined according to the theoretical half-width value of the segmented lower opening, the width of the lower opening T row and the reverse deformation of the lower opening.

[0042] The half-width value Y' of the outer plate reference line is between (Y-X) and Y, in mm, where Y is the theoretical half-width value of the lower opening of the segment, in mm, and X is the width of the lower opening T row, in mm. The half-width value Y'' of the deck reference line is obtained by the following formula:

[0043] Y''=Y'+Z

[0044] Y'' is in mm; Z is the reverse deformation of the lower opening in mm. During the construction process, the structure may deform due to the influence of welding and other processes. The reverse deformation of the lower opening Z is a value pre-set to offset this deformation.

[0045] Specifically, refer to Figure 6 In this embodiment, taking the theoretical half-width value Y of the segmented lower opening as 10720mm and the width of the lower opening T row as 500mm as an example, the half-width value Y' of the outer plate reference line is between 10720mm and 10220mm. Preferably, the half-width value Y' of the outer plate reference line is set to an integer value. In this embodiment, the half-width value Y' of the outer plate reference line is set to 10300mm, and the reverse deformation amount Z is set to 5mm. The half-width value Y'' of the deck reference line is = Y'+Z, that is, the half-width value Y'' of the deck reference line is 10300mm+5mm, that is, the half-width value Y'' of the deck reference line is 10305mm.

[0046] S200: marking a deck reference line on the deck assembly, and marking a deck half-width position line perpendicular to the rib position line on each rib position line according to the half-width value of the deck reference line;

[0047] Specifically, refer to Figure 3, the deck reference line 11 is parallel to the rib position line 14 in the deck middle assembly 1, and the distance between the deck reference line 11 and the edge of one side of the deck middle assembly 1 parallel to the rib position line 14 is between 100mm and 200mm. Further, the distance between the deck reference line 11 and the edge of one side of the deck middle assembly 1 parallel to the rib position line 14 is between 130mm and 170mm. In this embodiment, the distance between the deck reference line 11 and the edge of one side of the deck middle assembly 1 parallel to the rib position line 14 is 150mm, and the deck reference line 11 is used for subsequent positioning.

[0048] like Figure 6 As shown, for ease of understanding, the coordinate axis shown in the figure is established. The deck half-width position line 12 is set on the deck assembly 1, with the coordinate origin as the starting point, and the distance from the starting point along the Y axis to the deck half-width position line is the calculated Y'' value. Figure 3 Since the edge of the deck assembly 1 is an arc, lines are drawn along different rib position lines 14 as the Y axis to establish different coordinate systems. The deck reference line half-width values ​​at different positions are calculated according to the actual situation, and then the deck half-width position line 12 is drawn according to each calculated deck reference line half-width value. The deck half-width position line 12 is set perpendicular to the rib position line 14. The rib plate 23 is set on the rib position line 14 of the deck assembly 1 (refer to Figure 3 ), to facilitate subsequent calibration, the length of the deck half-width position line 12 is greater than the thickness of the rib plate 23, so that the deck half-width position line 12 is still clearly visible after the other rib position components of the deck assembly 1 are installed.

[0049] S300: marking a shell plate reference line corresponding to the deck reference line on the shell plate assembly, and marking the shell plate half-width position on the ribs assembled in the shell plate according to the half-width value of the shell plate reference line;

[0050] Specifically, Figure 4 As shown, in order to ensure that the outer plate reference line 21 and the deck reference line 11 can correspond to each other in the subsequent positioning process, a line corresponding to the deck reference line 11 is marked on the outer plate assembly 2 (refer to Figure 3 ) one by one with respect to the outer panel reference line 21. The outer panel reference line 21 is parallel to the rib position line 14 in the outer panel assembly 2, and the distance between the outer panel reference line 21 and one side edge of the outer panel assembly 2 parallel to the rib position line 14 is between 100mm and 200mm. Furthermore, the distance between the outer panel reference line 21 and one side edge of the outer panel assembly 2 parallel to the rib position line 14 is between 130mm and 170mm. In this embodiment, the distance between the outer panel reference line 21 and one side edge of the outer panel assembly 2 parallel to the rib position line 14 is 150mm, and the outer panel reference line 21 is used for subsequent positioning. In order to further ensure that in the subsequent construction process, each component can be accurately assembled together according to the predetermined position and size, refer to Figure 5 and Figure 6, mark the outer plate half-width position 22 on the rib plate 23 of the outer plate assembly 2 according to the calculated outer plate reference line half-width value Y'. Figure 6 In the coordinate system shown, the origin of the coordinate system is taken as the starting point, and the distance from the starting point to the half-width position 22 of the outer plate along the Y axis is the calculated value of Y'.

[0051] S400: adjusting the deck assembly to the level of the assembly position;

[0052] Specifically, refer to Figure 2 Before assembling the mid-deck assembly 1 and the mid-outer plate assembly 2, adjust the mid-deck assembly 1 to the level of the assembly position, that is, adjust it to the level that all parts of the mid-deck assembly 1 are on the same horizontal plane. The occurrence of horizontal deviation may cause a series of serious problems. For example, it may cause the connection between the mid-outer plate assembly 2 and the mid-deck assembly 1 to be loose, thereby affecting the sealing and stability of the entire hull. In addition, horizontal deviation may also cause end face deviation, that is, the end face of the mid-outer plate assembly 2 does not match the predetermined design position, which will directly affect the appearance and performance of the hull. Therefore, if the mid-deck assembly 1 is not in a horizontal state at the assembly position, it must be adjusted immediately to avoid horizontal deviation in the subsequent assembly position of the mid-outer plate assembly 2.

[0053] S500: adjusting the outer plate reference line and the deck reference line to align their endpoints in the same direction;

[0054] Specifically, refer to Figure 2 In the process of building ships or large steel structures, the precise positioning of the outer plate assembly 2 is one of the key steps to ensure the stability and accuracy of the overall structure. In order to achieve this goal, it is first necessary to accurately align the outer plate assembly 2 with the reference end face of the deck assembly 1. Under the premise that the assembly position of the deck assembly 1 is horizontal, adjust the deck reference line 11 and the outer plate reference line 21 to align the end points in the same direction. When the deck reference line 11 and the outer plate reference line 21 are aligned at the end points in the same direction, it means that the reference end faces of the deck assembly 1 and the outer plate assembly 2 are consistent. Subsequently, the deck assembly 1 and the outer plate assembly 2 are fixed by tack welding through the tongue and groove. When performing tack welding, it is necessary to ensure that the quality of the weld meets the relevant standards and avoid adverse effects on subsequent formal welding. Tack welding is a temporary welding method, and its main purpose is to temporarily fix two parts together for subsequent assembly and welding work. When performing tack welding, it is necessary to ensure that the quality of the weld meets the relevant standards and avoid adverse effects on subsequent formal welding.

[0055] S600: Adjust the outer plate until the marked half-width position of the outer plate is located on a normal line assembled in the deck, and the normal line passes through an intersection of the deck half-width position line and the rib position line.

[0056] Specifically, in this embodiment, a level that can emit horizontal and vertical laser lines is used to assist in measurement through the linearity and accuracy of the laser beam. First, the level is placed on the rib 23 of the assembly 1 in the deck that needs to be adjusted. Figure 2 and Figure 6 , the vertical beam emitted by the level coincides with the normal line 3 of the deck assembly 1, and each deck half-width position line 12 forms an intersection with the rib position line 14 at that position, and the deck assembly 1 is adjusted until the intersection is on the vertical beam emitted by the level. Then adjust the outer plate half-width position 22 until the outer plate half-width position 22 is on the vertical beam emitted by the level. When the intersection of the deck half-width position line 12 and the rib position line 14 and the marked outer plate base half-width position 22 are all on the vertical beam emitted by the level, positioning is completed.

[0057] By marking the deck reference line on the mid-deck assembly and marking the deck half-width position line perpendicular to the rib position line on each rib position line. And marking the outer plate reference line corresponding to the deck reference line on the outer plate assembly and marking the outer plate half-width position on the rib plate. Then adjust the outer plate reference line and the deck reference line to align the endpoints in the same direction. Adjust the outer plate until the marked outer plate half-width position is located on the normal line of the mid-deck assembly, and the normal line passes through the intersection of the deck half-width position line and the rib position line. When performing the mid-deck assembly and the mid-assembly positioning of the curved outer plate, the curved outer plate mid-assembly positioning method can be used to complete it autonomously at one time, saving time and manpower and material resources.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for assembling and positioning a curved outer panel, characterized in that: include: Providing a segmented tire frame, and determining the half-width value of the outer plate reference line and the half-width value of the deck reference line according to the segmented lower opening theoretical half-width value of the segmented tire frame, the width of the lower opening T row and the lower opening reverse deformation amount; Marking a deck reference line on the deck assembly and marking a deck half-width position line perpendicular to the rib position line on each rib position line according to the half-width value of the deck reference line; Mark a shell plating reference line corresponding to the deck reference line on the shell plating assembly, and mark the shell plating half-width position on the lower member according to the shell plating reference line half-width value; Adjusting the deck assembly to a level assembly position; Adjust the outer plate reference line and the deck reference line to align their end points in the same direction; The outer plate is adjusted until the marked half-width position of the outer plate is located at a normal line assembled in the deck, and the normal line passes through the intersection of the deck half-width position line and the rib position line.

2. The method for assembling and positioning a curved outer panel according to claim 1, characterized in that: The half-width value Y' of the outer plate reference line is between (Y-X) and Y, in mm, wherein Y is the theoretical half-width value of the segmented lower opening, in mm, and X is the width of the lower opening T row, in mm.

3. The method for assembling and positioning a curved outer panel according to claim 2, characterized in that: The deck reference line half-width value Y'' is obtained by the following formula: Y''=Y'+Z Among them, Y'' is in mm; Z is the reverse deformation of the lower mouth, in mm.

4. The method for assembling and positioning a curved outer panel according to claim 1, characterized in that: The deck reference line is parallel to the rib position line assembled in the deck, and the distance between the deck reference line and the edge of one side parallel to the rib position line assembled in the deck is between 100mm and 200mm. The length of the deck half-width position line is greater than the thickness of the rib plate, and the rib plate is arranged at the rib position line assembled in the deck.

5. The method for assembling and positioning a curved outer panel according to claim 4, characterized in that: The outer plate reference line is arranged in one-to-one correspondence with the deck reference line, the outer plate reference line is parallel to the rib position line in the outer plate middle assembly, and the distance between the outer plate reference line and one side edge of the outer plate middle assembly parallel to the rib position line is between 100 mm and 200 mm.

6. The method for assembling and positioning a curved outer panel according to claim 1, characterized in that: After adjusting the outer plate reference line and the deck reference line to align their end points in the same direction, the deck and the outer plate are connected.

7. The method for assembling and positioning a curved outer panel according to claim 6, characterized in that: The deck is connected to the outer plate via a tongue and groove.

8. The method for assembling and positioning a curved outer panel according to claim 1, characterized in that: The segmented tire frame is placed on a horizontal surface.

9. The method for assembling and positioning a curved outer panel according to claim 1, characterized in that: The positions of the deck half-width position line and the marked outer plate half-width position are adjusted using the vertical beam emitted by the level.

10. The method for assembling and positioning a curved outer panel according to claim 9, characterized in that: When the intersection of the deck half-width position line and the rib position line and the marked outer plate half-width position are all on the vertical light beam emitted by the level meter, the positioning is completed.

Images