A positioning method for a ship section stem cast steel part

Abstract

The application provides a positioning method for ship segment bow column cast steel parts. The method matches actual installation data on site with theoretical data in a theoretical model, matches data of two bow column cast steel parts of two segments, and adjusts deviation of the data matching, so as to ensure the positioning accuracy of the segment total assembly stage and the positioning accuracy of the bow column cast steel parts on each segment.

Description

Technical Field

[0001] This application relates to the field of shipbuilding technology, specifically to a method for positioning a cast steel bow section of a ship. Background Technology

[0002] Currently, during shipbuilding, some ship bow castings are divided into several sections and installed in different sections. Using the nearest hull structure as a reference for two-dimensional positioning of the bow casting, and simultaneously ensuring section alignment accuracy during the assembly of the upper and lower sections, can easily lead to significant deviations in bow alignment accuracy. In existing positioning methods based on the section structure, structural errors between two sections can easily accumulate at the connection point of the bow casting, resulting in significant bow misalignment during the assembly phase. This makes correction during the assembly phase difficult, thus affecting the assembly accuracy and efficiency of the sections. Summary of the Invention

[0003] The purpose of this application is to provide a positioning method for a cast steel bow column of a ship. According to the above positioning method, the mounting accuracy and mounting efficiency of ship sections and bow columns can be improved.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A method for positioning a cast steel bow column of a ship section, wherein the section includes a first section and a second section, wherein the first cast steel bow column is assembled on the first section and the second cast steel bow column is assembled on the second section, the method comprising: positioning the first cast steel bow column.

[0006] Positioning adjustment of the first first column cast steel component: Obtain the coordinate data of the first first column cast steel component, compare the coordinate data of the first first column cast steel component with the theoretical data in the theoretical model, and position the first first column cast steel component accordingly;

[0007] Positioning the second first column cast steel component; adjusting the positioning of the second first column cast steel component: obtaining the coordinate data of the second first column cast steel component, comparing the coordinate data of the second first column cast steel component with the theoretical data in the theoretical model, and adjusting the positioning of the second first column cast steel component; simulating the mounting of the first segment and the second segment to obtain the relative deviation between the first first column cast steel component and the second first column cast steel component;

[0008] The position of the second first column casting is adjusted according to the relative deviation between the first and second first column castings.

[0009] In some implementations, the extension direction of the center line of the first segment of the first segment is defined as the width direction, the extension direction of the rib line of the first segment of the first segment is defined as the aft and stern direction, and the extension direction of the deck height of the first segment of the first segment is defined as the height direction; a three-dimensional coordinate system is established, with the width direction set as the X direction, the aft and stern direction as the Y direction, and the height direction as the Z direction.

[0010] In some embodiments, positioning and adjusting the first cast steel column further includes: acquiring coordinate data of the first segment, wherein the coordinate data of the first segment includes: X11 for the width direction of the measurement point of the end face of the first segment; Y11 for the beginning and end direction of the measurement point of the center of the first segment; and Z11 for the height direction of the horizontal measurement point of the first segment.

[0011] In some embodiments, positioning and adjusting the first column cast steel part further includes: matching the coordinate data of the first segment with the first theoretical data in the theoretical model, and adjusting the first segment according to the first matching standard.

[0012] In some embodiments, the coordinate data of the first first column cast steel component includes: X12 for the measurement point of the first first column cast steel component in the width direction; Y12 for the measurement point of the first first column cast steel component in the head-to-tail direction; and Z12 for the measurement point of the first first column cast steel component in the height direction.

[0013] In some implementations, the first theoretical data includes: X1, the data of the measurement point at the end face of the first segment in the theoretical model in the width direction; Y1, the data of the measurement point at the center of the first segment in the theoretical model in the beginning and end direction; and Z1, the data of the horizontal measurement point of the first segment in the theoretical model in the height direction.

[0014] In some implementations, the extension direction of the center line of the second segment of the second segment is defined as the width direction, the extension direction of the rib line of the second segment of the second segment is defined as the aft and stern direction, and the extension direction of the deck height of the second segment of the second segment is defined as the height direction; a three-dimensional coordinate system is established, with the width direction set as the X direction, the aft and stern direction as the Y direction, and the height direction as the Z direction.

[0015] In some embodiments, the positioning adjustment of the second first column cast steel component further includes: acquiring the coordinate data of the second segment, wherein the coordinate data of the second segment includes: the measurement point of the end face of the second segment in the width direction is X21; the measurement point of the center of the second segment in the beginning-end direction is Y21; and the measurement point of the horizontal measurement point of the second segment in the height direction is Z21.

[0016] In some embodiments, the positioning adjustment of the second first column cast steel part further includes: matching the coordinate data of the second segment with the second theoretical data in the theoretical model, and adjusting the second segment according to the second matching standard.

[0017] In some embodiments, the second theoretical data includes: X2, the data of the measurement point at the end face of the second segment in the theoretical model in the width direction; Y2, the data of the measurement point at the center of the second segment in the theoretical model in the beginning and end direction; and Z2, the data of the horizontal measurement point of the second segment in the theoretical model in the height direction.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] This application provides a method for positioning a cast steel bow pillar in a ship section. The cast steel bow pillar is installed in different sections, including a first section and a second section. The first cast steel bow pillar is assembled on the first section, and the second cast steel bow pillar is assembled on the second section. This application obtains the overall three-dimensional data of the first section and the three-dimensional data of the installation position of the cast steel bow pillar in the first section. After comparing these data with the theoretical data of a theoretical model, the position of the first section is adjusted to a construction-allowed state. At this point, the installation position of the first cast steel bow pillar is adjusted according to the deviation between the cast steel bow pillar and the theoretical model. After the initial positioning of the second first column cast steel component in the second segment, the second segment is adjusted to a construction-allowed state according to the theoretical model. Simulation matching software is used to simulate and match the data of the first segment and the second segment that are connected vertically. After adjusting the connection and positioning of the above segments to a construction-allowed state, the alignment accuracy of the first column cast steel component in the first segment and the first column cast steel component in the second segment is compared. If there is a deviation in the alignment of the upper and lower first columns, the installation position of the first column cast steel component in the second segment is adjusted to ensure the connection accuracy of the first column cast steel components in different segments during the assembly stage.

[0020] The positioning method of this application matches the actual on-site installation data with the theoretical data in the theoretical model, matches the data of the first column cast steel parts of multiple segments, and adjusts the deviation of the data matching, thereby ensuring the alignment accuracy of the overall segment assembly stage and the alignment accuracy of the first column cast steel parts of each segment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This illustration shows a schematic diagram of the installation of the first column cast steel component of the first segment in one embodiment of this application;

[0023] Figure 2 This illustration shows a schematic diagram of the installation of the second first column cast steel component of the second segment according to an embodiment of this application;

[0024] Figure 3 This diagram illustrates the upper and lower groups of the first and second segments according to an embodiment of the present invention.

[0025] Figure 4 The diagram shows the location distribution of each measurement point when the first and second segments are grouped together.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. First section; 2. Second section; 3. First anchor cast steel component; 4. Measurement point of the first anchor cast steel component; 5. Center line of the first section; 6. Rib line of the first section; 7. Deck of the first section; 8. Second anchor cast steel component; 9. Measurement point of the second anchor cast steel component; 10. Center line of the second section; 11. Rib line of the second section; 12. Deck of the second section. Detailed Implementation

[0028] The technical solutions of the specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this application and are not intended to limit this application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Figure 1This illustration shows a schematic diagram of the installation of the first column cast steel component of the first segment according to an embodiment of this application. Figure 2 This illustration shows a schematic diagram of the installation of the second first column cast steel component of the second segment according to an embodiment of this application; Figure 3 This diagram illustrates the upper and lower groups of the first and second segments according to an embodiment of the present invention. Figure 4 This diagram illustrates the location distribution of measurement points when the first and second segments are grouped together. The following section will combine... Figures 1 to 4 The positioning method for the cast steel bow pillar of a ship is described in detail.

[0032] One embodiment of this application describes a method for positioning a cast steel bow section of a ship, comprising:

[0033] Positioning of the first cast steel column 3:

[0034] Preliminary positioning of the first segment 1 and the first head pillar cast steel component 3 on the first segment 1 is performed. The centerline 5 of the first segment is set as the width reference, the rib line 6 of the first segment as the beginning and end reference, and the deck 7 of the first segment as the height reference. The upper and lower ends of the first head pillar cast steel component 3 are initially positioned and temporarily fixed using spot welding. Preliminary positioning can be achieved using a measuring tape, plumb bob, or a total station for two-dimensional or three-dimensional positioning.

[0035] like Figures 1 to 4 As shown, the extension direction of the centerline 5 of the first segment is defined as the head-to-tail direction, the extension direction of the rib line 6 of the first segment is defined as the width direction, and the extension direction of the deck 7 of the first segment is defined as the height direction. A three-dimensional coordinate system is established, with the width direction set as the X direction, the head-to-tail direction as the Y direction, and the height direction as the Z direction. Using a total station, the coordinate data of the first segment 1 in the X, Y, and Z directions are measured in three dimensions to obtain the three-dimensional coordinate data X11, Y11, and Z11 of the first segment 1.

[0036] Among them, such as Figure 4 As shown, the data for X11 was measured at the end face of segment 1, the data for Y11 was measured at the center point of segment 1, and the data for Z11 was measured at the horizontal point of segment 1. Accordingly, the three-dimensional coordinate data X1, Y1, and Z1 of segment 1 in the theoretical model are obtained. The theoretical model described in this application can be understood as the overall model after the simulation of segment 1 and segment 2 is completed, or it can be understood as the theoretical model of segment 1 and the theoretical model of segment 2, respectively. All three-dimensional coordinate data in this application use the same coordinate system and origin. The specific measurement of the corresponding X, Y, and Z values ​​is a technique well-known to those skilled in the art and will not be elaborated upon here.

[0037] like Figure 1As shown, the first cast steel column 3 has an arc-shaped structure. In this application, measurement point 4 of the first cast steel column is set as the measurement marker point of the first cast steel column 3. Similarly, the coordinate data of the first cast steel column 3 in the X, Y and Z directions are measured in three dimensions using a total station to obtain the three-dimensional coordinate data X12, Y12 and Z12 of the first cast steel column 3 measurement point 4.

[0038] The three-dimensional coordinate data X11, Y11, and Z11 obtained from the measurement of the first segment 1 are matched with the three-dimensional coordinate data of the first segment 1 in the theoretical model using three-dimensional accuracy analysis software. The three-dimensional coordinate system of the first segment 1 is matched with the three-dimensional coordinate system of the first segment 1 in the theoretical model, and the coordinate data of the first segment 1 are adjusted according to the following first matching standard: X11 vs. X1 ≤ ±2mm, Y11 vs. Y1 ≤ 1mm, Z11 vs. Z1 ≤ ±3mm. The positioning position of the first segment 1 is adjusted according to the above first matching standard to ensure a good match between the actual installed three-dimensional coordinate data of the first segment 1 and the corresponding three-dimensional coordinate data of the first segment 1 in the theoretical model. Correspondingly, the coordinate data of the first first column cast steel component 3 installed on the first segment 1 will also change accordingly. The theoretical coordinate deviation of the first first column cast steel component 3 in the three-dimensional coordinate system of the first segment 1 in the theoretical model is further determined.

[0039] Based on the deviation between the preliminary positioning data X12, Y12, Z12 of the first column cast steel component measurement point 4 and the theoretical position data, the position of the first column cast steel component 3 is adjusted to complete the secondary positioning of the first column cast steel component 1. Specifically, the deviation between the adjusted three-dimensional coordinate data of the first column cast steel component 1 and the theoretical coordinate data of the first column cast steel component in the X, Y, and Z directions should be ±2mm.

[0040] Preferably, after the secondary positioning of the first column cast steel part 1 is completed, the three-dimensional coordinate data of the first segment 1 and the three-dimensional coordinate data of the measurement point 4 of the first column cast steel part can be measured again. The matching accuracy between the adjusted actual coordinate data of the first segment 1 and the actual measured three-dimensional coordinate data of the first segment 1 can be adjusted to the best state for subsequent simulation and loading.

[0041] Positioning and installation of the second first column cast steel component 8:

[0042] The second section 2 and the second first column cast steel component 8 are initially positioned on the second section 2. The centerline 10 of the second section is set as the width reference, the rib line 11 of the second section as the head and tail reference, and the deck 12 of the second section as the height reference. The upper and lower ends of the second first column cast steel component 8 are initially positioned and temporarily fixed using spot welding. Initial positioning can be achieved using a measuring tape, plumb bob, or a total station for two-dimensional or three-dimensional positioning.

[0043] It is worth noting that using the segmented rib lines as the starting and ending references allows for selection based on proximity, facilitating construction operations. Furthermore, the upper and lower ends of the first column cast steel component should use the same rib line as a reference to reduce cumulative structural errors. That is, the first segment 1 and the second segment 2 use the same rib line as a reference.

[0044] like Figures 1 to 4 As shown, the extension direction of the centerline 10 of the second segment is defined as the head-to-tail direction, the extension direction of the rib line 11 of the second segment is defined as the width direction, and the extension direction of the deck 12 of the second segment is defined as the height direction. A three-dimensional coordinate system is established, with the width direction set as the X direction, the head-to-tail direction as the Y direction, and the height direction as the Z direction. Using a total station, the coordinate data of the second segment 2 in the above-mentioned X, Y, and Z directions are measured in three dimensions to obtain the three-dimensional coordinate data X21, Y21, and Z21 of the second segment 2. Wherein, as... Figure 4 As shown, the data for X21 was obtained from the measurement point at the end face of the second segment 2, the data for Y21 was obtained from the measurement point at the center of the second segment 2, and the data for Z21 was obtained from the measurement point at the horizontal measurement point of the second segment 2.

[0045] like Figure 1 As shown, the second first column cast steel component 8 has an arc-shaped structure. In this application, measurement point 9 of the second first column cast steel component is set as the measurement marker point of the second first column cast steel component 8. Similarly, the coordinate data of the measurement point 9 of the second first column cast steel component in the X, Y and Z directions are measured in three dimensions using a total station to obtain the three-dimensional coordinate data X22, Y22 and Z22 of the measurement point 9 of the second first column cast steel component.

[0046] The 3D coordinate data X21, Y21, and Z21 obtained from the measurement of the second segment 2 were matched with the theoretical coordinate system of the theoretical model using 3D accuracy analysis software. The theoretical model data of the second segment 2 was adjusted according to the following matching criteria: X21 vs. X2 ≤ ±2mm, Y21 vs. Y2 ≤ 1mm, and Z21 vs. Z2 ≤ ±3mm. The positioning of the second segment 2 was adjusted according to these matching criteria to ensure a good match between the actual installed coordinate data of the second segment 2 and the corresponding coordinate data of the theoretical model of the second segment 2.

[0047] Simulated loading was conducted based on the adjusted first segment 1 and the adjusted second segment 2. The X-value deviation of the tail end measurement points of the first segment 1 and the second segment 2 in the width direction was adjusted to ≤±3mm, and the Y-value deviation of the center measurement point in the bow and tail direction was adjusted to ≤±2mm. After loading the two segments onto the deck, the deviation between the deck height of the first segment 1 and the second segment 2 and the theoretical total height after loading was controlled within 0-6mm.

[0048] The total height of the aforementioned first segment 1 and second segment 2 can be understood as: (e.g.) Figure 3 As shown, with Figure 3 The vertical direction of the paper's orientation corresponds to the height direction of the first segment 1 and the second segment 2. After the first segment 1 is mounted on top of the second segment 2, its height is the height between the deck layers after the first segment 1 and the second segment 2 are mounted. After the simulated mounting and matching is completed, the alignment deviations of the second first column cast steel component measuring point 9 and the first first column cast steel component measuring point 4 in the X, Y, and Z directions are determined. Based on the relative deviations of the first first column cast steel component measuring point 4 and the second first column cast steel component measuring point 9 in the simulated matching, the installation position of the second first column cast steel component measuring point 9 is readjusted. After the second first column cast steel component 8 is adjusted to be qualified, welding work is carried out. Using the positioning method of this application, after the two segments are mounted, the deviation between the second first column cast steel component 8 and the first first column cast steel component 3 is small, and the three-dimensional coordinate deviations of the two-segment first column cast steel components are within ±5mm.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A method for positioning a cast steel bow column of a ship section, the section comprising a first section and a second section, wherein, The first cast steel column is assembled on the first segment, and the second cast steel column is assembled on the second segment, characterized in that it includes: The first cast steel column is initially positioned on the first segment. Positioning adjustment of the first first column cast steel component: Obtain coordinate data of the first segment, match the coordinate data of the first segment with the coordinate data of the first segment in the theoretical model, and adjust the positioning position of the first segment according to the first matching standard; Obtain coordinate data of the first first column cast steel component, adjust the coordinate data of the first first column cast steel component accordingly based on the adjusted coordinate data of the first segment, determine the theoretical coordinate deviation between the adjusted first first column cast steel component and the first first column cast steel component in the theoretical model, and adjust the positioning of the first first column cast steel component again according to the theoretical coordinate deviation; The second first column cast steel component is initially positioned on the second segment; Positioning adjustment of the second first column cast steel component: Obtain the coordinate data of the second segment, match the coordinate data of the second segment with the coordinate data of the second segment in the theoretical model, and adjust the positioning position of the second segment according to the second matching standard; The first segment and the second segment are simulated to obtain the relative deviation between the first and second first column cast steel parts. The position of the second first column casting is adjusted according to the relative deviation between the first and second first column castings.

2. The positioning method as described in claim 1, characterized in that, The direction of the centerline of the first segment of the first section is defined as the head-to-tail direction, the direction of the rib line of the first segment of the first section is defined as the width direction, and the direction of the deck height of the first segment of the first section is defined as the height direction. Establish a three-dimensional coordinate system, setting the width direction as the X direction, the beginning and end directions as the Y direction, and the height direction as the Z direction.

3. The positioning method as described in claim 2, characterized in that, The coordinate data of the first segment includes: The measurement point at the end face of the first segment in the width direction is X11; The data of the segment center measurement point of the first segment in the beginning and end direction is Y11; The horizontal measurement point of the first segment is Z11 in the height direction.

4. The positioning method as described in claim 2, characterized in that, The coordinate data of the first cast steel column includes: The measurement point for the first cast steel column in the width direction is X12; The measurement point of the first cast steel column in the first and last direction is Y12; The measurement point for the first column cast steel component is Z12 in the height direction.

5. The positioning method as described in claim 2, characterized in that, The coordinate data for the first segment in the theoretical model includes: The measurement point at the end face of the first segment in the theoretical model is X1 in the width direction; In the theoretical model, the data of the segment center measurement point of the first segment in the beginning and end directions is Y1; In the theoretical model, the data of the horizontal measurement point of the first segment in the height direction is Z1.

6. The positioning method as described in claim 2, characterized in that, The first matching criterion is: The data deviation in the width direction between the measurement point of the end face of the first segment and the measurement point of the end face of the first segment in the theoretical model is ≤ ±2 mm; The data deviation between the center measurement point of the first segment and the center measurement point of the first segment in the theoretical model in the beginning and end directions is ≤1 mm; The data deviation in the height direction between the segmental horizontal measurement point of the first segment and the segmental horizontal measurement point of the first segment in the theoretical model is ≤ ±3 mm.

7. The positioning method as described in claim 1, characterized in that, The direction of the centerline of the second segment is defined as the end direction, the direction of the rib line of the second segment is defined as the width direction, and the direction of the deck height of the second segment is defined as the height direction. Establish a three-dimensional coordinate system, setting the width direction as the X direction, the beginning and end directions as the Y direction, and the height direction as the Z direction.

8. The positioning method as described in claim 7, characterized in that, The coordinate data for the second segment includes: The measurement point at the end face of the second segment in the width direction is X21; The data for the segment center measurement point of the second segment in the beginning and end directions is Y21; The horizontal measurement point of the second segment is Z21 in the height direction.

9. The positioning method as described in claim 7, characterized in that, The coordinate data for the second segment in the theoretical model includes: The measurement point at the end face of the second segment in the theoretical model is X2 in the width direction; In the theoretical model, the data of the segment center measurement point of the second segment in the beginning and end directions is Y2; In the theoretical model, the data of the horizontal measurement point of the second segment in the height direction is Z2.

10. The positioning method as described in claim 7, characterized in that, The second matching criterion is: The data deviation in the width direction between the measurement point of the end face of the second segment and the measurement point of the end face of the second segment in the theoretical model is ≤ ±2 mm; The data deviation between the center measurement point of the second segment and the center measurement point of the second segment in the theoretical model in the beginning and end directions is ≤1 mm; The deviation in height between the segmental horizontal measurement point of the second segment and the segmental horizontal measurement point of the second segment in the theoretical model is ≤ ±3 mm.

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