Ship fin stabilizer carrying positioning precision control method
By surveying the baseline and half-width lines on the segmented ribs of the anti-shaking fins, and measuring and adjusting the angle using a total station, the problem of insufficient positioning accuracy of the anti-shaking fin is solved, and efficient loading accuracy control is achieved.
Patent Information
- Application Number
- CN202510816722.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, the mounting positioning accuracy of the anti-shaking fin is difficult to meet the high standard requirements, resulting in low loading work efficiency.
By surveying the baseline and half-width lines on the anti-rock fin segment ribs, measuring the height and half-width of points C and D using a total station, calculating the actual inclination angle of the installation angle line, and adjusting until the set value is met, ensuring the precise positioning of the anti-rock fin segment ribs and the ship's installation position.
The precise positioning of the anti-shaking fin segmented ribs is achieved, the loading work efficiency is improved, and the loading accuracy is ensured to meet the standard requirements.
Smart Images
Figure CN120482287A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of shipbuilding, and more specifically, relates to a method for controlling the positioning accuracy of ship fin stabilizers. Background Art
[0002] With the rapid advancement of the modern shipbuilding industry, various new technologies, new processes and new methods are constantly being introduced into the production process of the manufacturing industry, promoting the improvement of production efficiency. As an important component of ships, fin stabilizers improve the safety of ships and improve the seaworthiness of ships. Since the fin stabilizers involved in the present invention are retractable and have a certain angle with the horizontal plane of the ship, high positioning accuracy is required during the mounting stage. The fin stabilizers of this ship are relatively large. During the design stage, the fin stabilizers were planned to be with part of the hull structure, and they were made into a whole as sections to form a section containing retractable fin stabilizers for mounting and positioning. The mounting accuracy is relatively high. In order to ensure the positioning angle of the fin stabilizers and the mounting alignment of the sections containing the fin stabilizers, it is also necessary to ensure that the reference points of the previous positioning methods are difficult to find and the positioning accuracy is difficult to control.
[0003] The prior art includes a technique titled "A method for installing ship fin stabilizers" and having a publication (announcement) number of "CN118083070A." This technique discloses a method for installing ship fin stabilizers. The method is designed to include the following steps: first, determining the centerline of the fin shaft; second, positioning the fin seat; third, welding the fin seat to the hull structure; fourth, inspecting the fin seat welding; fifth, installing the mechanical assembly; sixth, checking the tightness of the mechanical assembly and the fin seat; seventh, installing the fairing; eighth, installing the fin blades; ninth, inspecting the fin blade rotation angle; and tenth, installing and painting the fin blade accessories. The method of the present invention involves the entire installation process of the fin stabilizer, improving the accuracy of the outer plate opening and the assembly accuracy of the fin seat; effectively preventing the fin seat from rotating along the fin shaft centerline during positioning, further verifying the accuracy of the fin shaft centerline positioning, and improving the installation accuracy and reliability of the fin stabilizer; ensuring the matching accuracy between the mechanical assembly and the inner hole of the fin seat, improving the efficiency of the mechanical assembly installation, and reducing the possibility of leakage during later use. However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the Invention
[0004] The technical problem to be solved by the present invention is: to address the shortcomings of the existing technology, to provide a method for controlling the mounting positioning accuracy of ship fin stabilizers, which has simple steps, can conveniently and reliably realize the mounting and positioning of the segmented ribs of the fin stabilizers, has the mounting accuracy meeting the standard requirements, and improves the mounting work efficiency.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:
[0006] The present invention provides a method for controlling the positioning accuracy of ship fin stabilizers. The control steps of the method are as follows:
[0007] S1. Mark the base H1 line, base H2 line, mid-width B1 line, and mid-width B2 line on the segmented fin stabilizer ribs. The intersection of the cross lines of the base H1 line and mid-width B1 line is point C, and the intersection of the cross lines of the base H2 line and mid-width B2 line is point D.
[0008] S2. Determine the half-width sample point E on the ground, set a height level marker at the center point of the ship, and set a height reference point F20 on the height level marker 10;
[0009] S3. Determine points A and B of the fin stabilizer segmented ribs; the line connecting points A and B forms the fin stabilizer segmented rib installation angle line;
[0010] S4. When positioning the segmented fin stabilizer ribs at the ship installation location, measure the respective heights of points A and B, and measure the respective heights of points C and D. Calculate the actual inclination angle of the segmented fin stabilizer rib installation angle line relative to the ground based on the respective heights of points A and B. If the actual inclination angle is within the set inclination angle range, and the respective heights of points C and D are within the set height range, it indicates that the installation angle and installation height of the segmented fin stabilizer ribs meet the requirements.
[0011] When the actual inclination angle and height of the installation angle line of the segmented fin stabilizer rib meet the requirements, the segmented fin stabilizer rib is welded to the installation position of the ship.
[0012] If the actual tilt angle is not within the set tilt angle range, adjust the status of the fin stabilizer segmented rib until the actual tilt angle of the fin stabilizer segmented rib installation angle line is within the set tilt angle range and meets the requirements; if the respective heights of points C and D are not within the set height range, adjust the status of the fin stabilizer segmented rib 1 until the respective heights of points C and D are within the set height range.
[0013] When determining point A and point B based on point C and point D, obtain the H4 line from the base and the B4 half-width line from the center. The intersection of the cross lines of the H4 line from the base and the B4 half-width line from the center is point A.
[0014] When determining point A and point B based on point C and point D, obtain the H3 line from the base and the B3 half-width line from the center. The intersection of the cross lines of the H3 line from the base and the B3 half-width line from the center is point B.
[0015] When determining point A 11 and point B 12 of the segmented fin stabilizer rib based on point C 5 and point D 6, the specific steps for determining point A and point B are as follows: a total station is placed on the ground at the bow end point, and the corresponding height and half-width of point A are measured based on the distance from the middle half-width line and the height reference point F; similarly, a total station is placed on the segment, and the corresponding height and half-width of point B are measured based on the distance from the middle half-width line and the height reference point F. When the segment is fine-tuned, the data of points A and B (points A\B) meet the requirements. Before measurement, use chalk line to pop up the crosshairs of points A\B at the Yangchong point position.
[0016] A total station is used to measure the respective heights of point A and point B.
[0017] A total station is used to measure the respective heights of points C and D.
[0018] The specific steps for measuring the respective heights of point C and point D are: before measurement, use chalk lines to pop out the cross lines of point C and point D (point C\D) at the Yangchong point position, set up a total station on the ground, and measure the corresponding height and half-width of point C / D based on the half-width line from the center and the height reference point F; check the deviation value after measuring the data in sections, and adjust the height and half-width value of point C / D; the median value of the half-width line distance is surveyed in advance as the center line offset data, and the height point F is the height point determined by the positioned total section level.
[0019] Before welding the fin stabilizer segment ribs to the ship installation position, the fin stabilizer segment ribs are fixed and then the welding operation is carried out.
[0020] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:
[0021] The key technical improvements and key protection points of the ship fin stabilizer installation positioning accuracy control method described in the present invention are as follows: After the segmented fin stabilizer ribs are manufactured, the baseline and half-width lines are surveyed and marked with Yang Chongyin. During the installation and positioning phase of the segmented fin stabilizer ribs, a half-width ground sample line E and a height reference pole are prepared on the slipway as the positioning measurement benchmark. During segmented positioning, a total station measures data based on the half-width line and height reference points. Based on the baseline H1 line, the baseline H2 line, the mid-width line B1, and the mid-width line B2 on the segment, points C and D are determined, and then points A and B are determined. Based on points A and B, the fin segmented rib installation angle line of the rib is determined. The measured data is adjusted for accuracy deviation, and then the actual inclination angle value of the fin segmented rib installation angle line is calculated. The actual inclination angle value is compared with the set inclination angle value to ensure that the adjusted positioning data meets the accuracy requirements, thereby improving positioning efficiency. The steps of the present invention accurately determine positioning data deviations and provide correct guidance and adjustment direction, ensuring that the overall positioning data of the segmented ribs and the positioning angle of the fin stabilizers meet the required accuracy. This method also allows for rapid crane uncoupling, improving loading efficiency. This method can be widely applied to similar segmented or overall positioning construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The following is a brief description of the contents and symbols in the drawings of this specification:
[0023] Figure 1 This is a schematic structural diagram of the segmented fin stabilizer ribs of the present invention;
[0024] Figure 2 This is a schematic structural diagram of the segmented fin stabilizer ribs of the present invention when they are positioned;
[0025] Figure 3 This is a schematic structural diagram of the segmented fin stabilizer ribs of the present invention;
[0026] The accompanying drawings are marked as follows: 1. segmented fin stabilizer rib; 2. H1 line from base; 3. H2 line from base; 4. B1 half-width line from center; 5. Point C; 6. Point D; 7. Ground; 8. Half-width ground sample point E; 9. Center point of ship; 10. Height horizontal benchmark; 11. Point A; 12. Point B; 13. Installation angle line of segmented fin stabilizer rib; 14. B4 half-width line from center; 15. H4 line from base; 16. B3 half-width line from center; 17. H3 line from base; 18. Total station; 19. B2 half-width line from center; 20. Height reference point F; 21. Yang Chongyin. DETAILED DESCRIPTION
[0027] The following describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.
[0028] As attached Figure 1 -Attached Figure 3 As shown, the present invention is a method for controlling the positioning accuracy of ship fin stabilizers, and the control steps of the method are as follows:
[0029] S1. On the fin stabilizer segment rib 1, mark out the line 2 from the base H1, the line 3 from the base H2, the half-width line 4 from the center B1, and the half-width line 19 from the center B2; the intersection of the cross lines of the line 1 from the base H1 and the half-width line 4 from the center B1 is point C 5, and the intersection of the cross lines of the line 3 from the base H2 and the half-width line 19 from the center B2 is point D 6; S2. Determine the half-width ground sample point E8 on the ground 7, set a height horizontal marker 10 at the center point 9 of the ship, and set a height reference point F20 on the height horizontal marker 10; S3. Determine point A 11 and point B 12 of the fin stabilizer segment rib; the determination of point A and point B is the same as that of point C\D, which are marked out at the stage of segment completion. Through overall segment measurement, on the outer plate at the FR115 rib position and the fin box near the center, according to the theoretical The angle value of the fin stabilizer formed by the intersection of the angle line, the outer plate, and the fin box at the FR115 rib position is determined. Then, cross lines are drawn at the corresponding positions at A and B respectively, and Yang Chong is made. The line connecting point A 11 and point B 12 forms the fin stabilizer segment rib installation angle line 13. S4. When the fin stabilizer segment rib is positioned at the ship installation location, the heights of point A 11 and point B 12 are measured, and the heights of point C 5 and point D 6 are measured. Based on the heights of point A 11 and point B 12, the actual inclination angle of the fin stabilizer segment rib installation angle line 13 relative to the ground 7 is calculated. If the actual inclination angle is within the set inclination angle range, and the heights of point C 5 and point D 6 are within the set height range, it means that the installation angle and installation height of the fin stabilizer segment rib 1 meet the requirements. The above steps address the shortcomings of the existing technology and propose an improved technical solution. The key technical improvements and key points are as follows: After the segmented fin stabilizer rib 1 is fabricated, different baselines and half-width lines are surveyed and marked on the segmented fin stabilizer rib 1. These baselines and half-width lines are then marked with Yang Chongyin 21. During the onboard positioning phase of the segmented fin stabilizer rib 1, a half-width ground sample line E and a height reference pole are established on the slipway as the positioning measurement benchmark. During segmented positioning, a total station 18 measures data based on the half-width lines and height reference points. Based on the segmented baseline H1 line 2, the baseline H2 line 3, the mid-distance B1 half-width line 4, and the mid-distance B2 half-width line 19, points C and D are determined. Furthermore, points A and B are determined. Based on points A and B, the fin segmented rib installation angle line 13 of the rib is determined. The measured data is adjusted for accuracy deviation, and the actual tilt angle of the fin segmented rib installation angle line 13 is calculated. The actual tilt angle is then compared with the set tilt angle to ensure that the adjusted positioning data meets the accuracy requirements, improving positioning efficiency. The steps of this invention accurately determine positioning data deviations and provide correct guidance and adjustment direction, ensuring that the overall positioning data of the segmented ribs and the positioning angles of the fin stabilizers meet the required accuracy. This also allows for rapid crane uncoupling, improving loading efficiency. This positioning method is widely applicable to similar segmented or overall positioning construction stages.The method for controlling the mounting positioning accuracy of ship fin stabilizers of the present invention has simple steps and can conveniently and reliably realize the mounting positioning of segmented fin stabilizers. The mounting accuracy meets standard requirements, thereby improving mounting work efficiency.
[0030] When the actual inclination angle and height of the fin stabilizer segment rib installation angle line meet the requirements, the fin stabilizer segment rib 1 is welded to the ship installation position. In the above steps, after the angle and height of the fin stabilizer segment rib are adjusted to the desired position, welding is performed to complete the installation.
[0031] If the actual inclination angle of the fin stabilizer rib is outside the set inclination angle range, adjust the position of the fin stabilizer rib 1 until the actual inclination angle of the fin stabilizer rib installation angle line 13 is within the set inclination angle range. If the heights of points C 5 and D 6 are outside the set height range, adjust the position of the fin stabilizer rib 1 until the heights of points C 5 and D 6 are within the set height range. In the above steps, for fin stabilizer ribs whose angles and heights do not meet the requirements, since the fin stabilizer ribs are in the hoisted state during positioning, the angle and height can be adjusted on site.
[0032] When determining points A 11 and B 12 based on points C 5 and D 6, the intersection of the lines connecting the distance from the base H4 line 15, the distance from the center B4 half-width line 14, and the distance from the base H4 line 15 and the distance from the center B4 half-width line 14 is obtained as point A 11. When determining points A 11 and B 12 based on points C 5 and D 6, the intersection of the lines connecting the distance from the base H3 line 17, the distance from the center B3 half-width line 16, and the distance from the base H3 line 17 and the distance from the center B3 half-width line 16 is obtained as point B 12. The above steps reliably determine points A and B.
[0033] When determining point A 11 and point B 12 of the segmented fin stabilizer rib based on point C 5 and point D 6, the specific steps for determining point A 11 and point B 12 are as follows: a total station is placed on the ground at the bow end point, and the corresponding height and half-width of point A are measured based on the distance from the middle half-width line and the height reference point F; similarly, a total station is placed on the segment, and the corresponding height and half-width of point B are measured based on the distance from the middle half-width line and the height reference point F. When the segment is fine-tuned, the data of points A\B meet the requirements. Before measurement, use chalk line to pop up the crosshairs of points A\B at the Yangchong point position.
[0034] The respective heights of point A 11 and point B 12 are measured using a total station 18 .
[0035] The total station 18 is used to measure the respective heights of point C 5 and point D 6 .
[0036] The specific steps for measuring the respective heights of point C 5 and point D 6 are as follows: before measurement, use chalk lines to pop out the cross lines of point C\D at the Yangchong point position, set up a total station 18 on the ground, and measure the corresponding height and half-width of point C / D based on the half-width line (8) from the middle and the height reference point F (20); check the deviation value after the measured data in sections, and adjust the height and half-width value of point C / D; the half-width line (8) is marked in advance as the center line offset data from the middle, and the height point F is the height point determined by the level of the total section that has been positioned.
[0037] Before welding the fin stabilizer segment ribs 1 to the ship installation position, the fin stabilizer segment ribs 1 are fixed and then welded. After welding, the installation of the fin stabilizer is completed.
[0038] The key technical improvements and key points of the ship fin stabilizer installation positioning accuracy control method described in the present invention are as follows: After the segmented fin stabilizer ribs are manufactured, the baseline and half-width lines are surveyed and marked with Yang Chongyin stamps 21. During the installation and positioning phase of the segmented fin stabilizer rib 1, a half-width ground sample line E and a height reference pole are prepared on the slipway as the positioning measurement benchmark. During segmented positioning, a total station 18 measures data based on the half-width lines and height reference points. Based on the segmented distance H1 line 2, the distance H2 line 3, the center B1 half-width line 4, and the center B2 half-width line 19, points C and D are determined. Then, points A and B are determined. Based on points A and B, the fin segmented rib installation angle line 13 of the rib is determined. The measured data is adjusted for accuracy deviation, and then the actual inclination angle value of the segmented fin stabilizer rib installation angle line 13 is calculated. The actual inclination angle value is compared with the set inclination angle value to ensure that the adjusted positioning data meets the accuracy requirements, thereby improving positioning efficiency. The steps of the present invention accurately determine positioning data deviations and provide correct guidance and adjustment direction, ensuring that the overall positioning data of the segmented ribs and the positioning angle of the fin stabilizers meet the required accuracy. This method also allows for rapid crane uncoupling, improving loading efficiency. This method can be widely applied to similar segmented or overall positioning construction.
[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.
Claims
1. A method for controlling the positioning accuracy of ship fin stabilizers, characterized by: The control steps of the ship fin stabilizer positioning accuracy control method are as follows: S1. On the fin stabilizer segmented rib (1), the base H1 line (2), the base H2 line (3), the center B1 half-width line (4), and the center B2 half-width line (19) are marked; the intersection of the cross lines of the base H1 line (2) and the center B1 half-width line (4) is point C (5), and the intersection of the cross lines of the base H2 line (3) and the center B2 half-width line (19) is point D (6); S2. Determine the half-width ground sample point E (8) on the ground (7), set a height level marker (10) at the center point of the ship (9), and set a height reference point F (20) on the height level marker (10); S3. Determine point A (11) and point B (12) of the fin stabilizer segmented rib; the line connecting point A (11) and point B (12) forms the fin stabilizer segmented rib installation angle line (13); S4. When the fin stabilizer segmented rib is positioned at the installation position of the ship, the respective heights of point A (11) and point B (12) are measured, and the respective heights of point C (5) and point D (6) are measured. The actual inclination angle of the fin stabilizer segmented rib installation angle line (13) relative to the ground (7) is calculated based on the respective heights of point A (11) and point B (12). The actual inclination angle is within the set inclination angle range, and the respective heights of point C (5) and point D (6) are within the set height range, indicating that the installation angle and installation height of the fin stabilizer segmented rib (1) meet the requirements.
2. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: When the actual inclination angle and height of the installation angle line of the fin stabilizer segmented rib plate meet the requirements, the fin stabilizer segmented rib plate (1) is welded to the installation position of the ship.
3. The method for controlling the positioning accuracy of ship fin stabilizers according to claim 1 or 2, characterized in that: If the actual tilt angle is not within the set tilt angle range, the state of the fin stabilizer segmented rib (1) is adjusted until the actual tilt angle of the fin stabilizer segmented rib installation angle line (13) is within the set tilt angle range and meets the requirements; if the respective heights of point C (5) and point D (6) are not within the set height range, the state of the fin stabilizer segmented rib (1) is adjusted until the respective heights of point C (5) and point D (6) are within the set height range.
4. The method for controlling the positioning accuracy of ship fin stabilizers according to claim 3, characterized in that: When determining point A (11) and point B (12) based on point C (5) and point D (6), obtain the distance from the base H4 line (15) and the distance from the center B4 half-width line (14). The intersection of the cross lines of the distance from the base H4 line (15) and the distance from the center B4 half-width line (14) is point A (11).
5. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: When point A (11) and point B (12) are determined based on point C (5) and point D (6), the distance from the base H3 line (17) and the distance from the center B3 half-width line (16) are obtained, and the intersection of the cross lines of the distance from the base H3 line (17) and the distance from the center B3 half-width line (16) is point B (12).
6. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: When determining point A (11) and point B (12) of the fin stabilizer segment rib according to point C (5) and point D (6), the steps for determining point A (11) and point B (12) are as follows: a total station is set up on the ground at the bow end point, and the corresponding height and half width of point A are measured according to the distance from the middle half width line and the height reference point F; similarly, a total station is set up on the segment, and the corresponding height and half width of point B are measured according to the distance from the middle half width line and the height reference point F. When the segment is fine-tuned, the data of point A\B meet the requirements. Before measurement, a cross line of point A\B at the Yangchong point position is popped out with a chalk line.
7. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: The respective heights of point A (11) and point B (12) are measured using a total station (18).
8. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: The respective heights of point C (5) and point D (6) are measured using a total station (18).
9. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: The steps for measuring the respective heights of point C (5) and point D (6) are as follows: before measurement, a cross line of point C\D at the position of Yangchong point is drawn in advance with a chalk line, a total station 18 is set up on the ground, and the corresponding height and half-width of point C / D are measured according to the half-width line (8) from the middle and the height reference point F (20); after segmenting the measured data, the deviation value is checked and the height and half-width value of point C / D are adjusted; the half-width line (8) is drawn in advance as the center line offset data from the middle, and the height point F is the height point determined as the reference for the level of the total section that has been positioned.
10. The method for controlling positioning accuracy of ship fin stabilizers according to claim 1, characterized in that: Before welding the fin stabilizer segmented ribs (1) to the ship installation position, the fin stabilizer segmented ribs (1) are fixed, and then the welding operation is performed.