阅读说明：本技术 一种船舶大线型分段总组精度控制方法 (Ship large-line type subsection total assembly precision control method ) 是由 王自成 杨宏发 于 2021-05-21 设计创作，主要内容包括：本发明提供一种船舶大线型分段总组精度控制方法,该方法通过架设全站仪对分段进行定位,先对分段进行二维定位,定位结束后对总段进行三维测量,通过电脑三维分析测量数据,将测量的数值与理论参考值比较,超过标准值时,对分段进行调整,充分利用测量全站仪结合三维分析软件来实现大线型分段总组精度控制。全站仪操作简便,测量精度高,可通过其对分段的全宽及甲板水平和外板线型进行现场测量,采集后结合三维理论数据匹配后,从而判断总段全宽及线型的变化情况,避免定位不准确的发生,节约分段总组搭载定位时间及后续线型不良等问题的二次修整工作减少劳动力,节约建造成本。(The invention provides a method for controlling the total group precision of a large linear section of a ship. The total station is simple and convenient to operate and high in measurement accuracy, the segmented full width, the deck level and the outer plate line type can be measured on site through the total station, and after the total station is collected and matched with three-dimensional theoretical data, the change condition of the total segment full width and the line type is judged, the occurrence of inaccurate positioning is avoided, the secondary trimming work of the problems of segmented total assembly carrying positioning time, poor subsequent line type and the like is saved, the labor is reduced, and the construction cost is saved.)

1. A ship large linear subsection total assembly precision control method is characterized by comprising the following steps:

step one, before the total assembly and positioning of the total section, a central line is arranged on the ground along the length direction of the bottom section, and reflecting sheets are attached to two ends of the central line;

step two, positioning the total section, namely sticking reflectors at the intersection point of a rib plate and an inner bottom plate of the total section and the intersection point of an outer plate and the rib plate, erecting a total station at the position where the reflectors at two ends of a central line can be measured on the total section, measuring the reflectors according to the sequence from stern to bow, and calculating the full width and horizontal data of the total section;

step three, after positioning is finished, selecting any one of four angular points of a total section, erecting a total station at the angular point, selecting a plurality of member intersection points as control points on two sides connected with the angular point, adhering a reflector plate, measuring coordinates of the control points, selecting two reference points to erect a transfer target after measurement is finished, and measuring the coordinates of the transfer target;

moving the total station to another angular point of the main section opposite to the diagonal of the angular point in the third step, erecting the total station at the angular point, measuring the coordinates of a transfer target, selecting intersection points of a plurality of members as control points on two sides connected with the angular point, adhering a reflector plate, and measuring the coordinates of the control points;

fifthly, selecting another two datum points to erect a transfer target, measuring the coordinates of the transfer target, moving the total station to the position of the large linear section which can be measured on the main section, sticking a reflector plate on the positions of an upper rudder hole and a lower rudder hole of the large linear section, and measuring the end point coordinates of the upper rudder hole, the lower rudder hole and the center line through the total station;

step six, converting the control point coordinates obtained by measurement in the step three and the step four into the same coordinate system through the coordinates of the transfer target;

and seventhly, calculating the measured values of the endpoint coordinates of the control point, the upper rudder hole, the lower rudder hole and the central line, and comparing the measured values with theoretical values.

2. The method for controlling the total group precision of the large linear section of the ship according to claim 1, wherein in the first step, if the center line is shielded by an obstacle in the drawing process, an auxiliary center line is drawn, and the auxiliary center line is parallel to the center line and the distance between the auxiliary center line and the center line is a determined value.

3. The total group precision control method of the large linear section of the ship according to claim 1, characterized in that the center line is an installation reference line of a rudder.

4. The overall assembly precision control method for the ship large linear scale division according to claim 1, wherein in the fifth step, the large linear section is a fore section or a stern section.

5. The method for controlling the total group precision of the large linear section of the ship according to claim 1, wherein in the sixth step, the total section is adjusted by calculating the X, Y and Z values of the coordinates of each point, if the difference between all the calculated values and the theoretical value is within the range of +/-5 mm, the welding is normal, and if the difference between any one calculated value and the theoretical value is outside the range of +/-5 mm.

Technical Field

The invention relates to the technical field of ship construction, in particular to a ship large linear section overall assembly precision control method.

Background

In the ship building process, especially the total section of the large linear section, the control points are more, the structure is complex, most of the current ship enterprises determine the change of the full width of the large linear section by measuring the centering and longitudinal directions of the measuring tape, and the control on the external plate line is less or even basically not controlled. The most of the deck levels are measured only at the edge opening, the middle position can be observed only by naked eyes, and the error is large. And as the block is placed on the site and is subjected to the influence of natural weather and the change of temperature difference in the morning and evening for a long time, in the process, artificial reading errors exist, measurement errors are finally caused, field measurement personnel cannot perceive the errors, the precision of the block is uncontrollable, and accurate positioning and subsequent control cannot be realized.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a control method for the overall assembly precision of a large linear section of a ship, which is used for solving the problem that the precision of the overall section before welding cannot be accurately detected in the prior art.

In order to achieve the above objects and other related objects, the present invention provides a method for controlling the overall assembly precision of a large linear section of a ship, comprising the following steps:

step one, before the total assembly and positioning of the total section, a central line is arranged on the ground along the length direction of the bottom section, and reflecting sheets are attached to two ends of the central line;

step two, positioning the total section, namely sticking reflectors at the intersection point of a rib plate and an inner bottom plate of the total section and the intersection point of an outer plate and the rib plate, erecting a total station at the position where the reflectors at two ends of a central line can be measured on the total section, measuring the reflectors according to the sequence from stern to bow, and calculating the full width and horizontal data of the total section;

step three, after positioning is finished, selecting any one of four angular points of a total section, erecting a total station at the angular point, selecting a plurality of member intersection points as control points on two sides connected with the angular point, adhering a reflector plate, measuring coordinates of the control points, selecting two reference points to erect a transfer target after measurement is finished, and measuring the coordinates of the transfer target;

moving the total station to another angular point of the main section opposite to the diagonal of the angular point in the third step, erecting the total station at the angular point, measuring the coordinates of a transfer target, selecting intersection points of a plurality of members as control points on two sides connected with the angular point, adhering a reflector plate, and measuring the coordinates of the control points;

fifthly, selecting another two datum points to erect a transfer target, measuring the coordinates of the transfer target, moving the total station to the position of the large linear section which can be measured on the main section, sticking a reflector plate on the positions of an upper rudder hole and a lower rudder hole of the large linear section, and measuring the end point coordinates of the upper rudder hole, the lower rudder hole and the center line through the total station;

step six, converting the control point coordinates obtained by measurement in the step three and the step four into the same coordinate system through the coordinates of the transfer target;

and seventhly, calculating the measured values of the endpoint coordinates of the control point, the upper rudder hole, the lower rudder hole and the central line, and comparing the measured values with theoretical values.

Preferably, in the first step, if the center line is blocked by an obstacle during the drawing, an auxiliary center line is drawn, and the auxiliary center line is parallel to the center line and has a predetermined distance from the center line.

Preferably, the center line is an installation reference line of the rudder.

As a preferred technical solution, in the fifth step, the large linear segment is a bow segment or a stern segment.

Preferably, in the seventh step, the X, Y, and Z values of the coordinates of each point are calculated, if the difference between all calculated values and the theoretical value is within ± 5mm, the welding is performed normally, and if the difference between any one calculated value and the theoretical value is outside the ± 5mm, the total section is adjusted.

As mentioned above, the large linear type subsection total group precision control method has the following beneficial effects:

(1) according to the invention, through measuring two-dimensional and three-dimensional precision control by the total station, large-line type subsection repeated positioning and subsequent carrying dislocation can be avoided, the operation is more convenient and faster, and the application cost and the waste of labor force are reduced;

(2) the invention avoids the interference of external factors such as weather and the like on data measurement and reading and improves the data accuracy.

(3) The invention carries out three-dimensional analysis by the computer after the two-dimensional and three-dimensional measurement of the block to obtain the distance between the large linear block outer plate and the middle longitudinal distance central line, effectively controls the linear of the block and the level of the deck, and improves the precision of the block construction.

Drawings

FIG. 1 is a drawing structure of the center line of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The invention provides a method for controlling the overall assembly precision of a large linear section of a ship, which comprises the following steps:

step one, before the total assembly and positioning of the main section, a central line is arranged on the ground along the length direction of the bottom section, and the central line is an installation datum line of the rudder. Reflective sheets are attached to both ends of the center line, and are labeled as a1 and a 2. If the center line is shielded by an obstacle in the drawing process, drawing an auxiliary center line, attaching reflection sheets marked as b1 and b2 at two ends of the auxiliary center line, wherein the auxiliary center line is parallel to the center line and the distance between the auxiliary center line and the center line is a determined value.

Step two, positioning the total section, namely sticking reflectors at the intersection point of a rib plate and an inner bottom plate of the total section and the intersection point of an outer plate and the rib plate, erecting a total station at the position where the reflectors at two ends of a central line can be measured on the total section, measuring the reflectors according to the sequence from stern to bow, and calculating the full width and horizontal data of the total section;

step three, after positioning is finished, selecting any one of four angular points of a total section, erecting a total station at the angular point, selecting a plurality of member intersection points as control points on two sides connected with the angular point, adhering a reflector plate, measuring coordinates of the control points, selecting two reference points to erect a transfer target after measurement is finished, and measuring the coordinates of the transfer target;

moving the total station to another angular point of the main section opposite to the diagonal of the angular point in the third step, erecting the total station at the angular point, measuring the coordinates of a transfer target, selecting intersection points of a plurality of members as control points on two sides connected with the angular point, adhering a reflector plate, and measuring the coordinates of the control points;

and fifthly, selecting another two datum points to erect a transfer target, measuring the coordinates of the transfer target, moving the total station to the position on the main section where the large linear section can be measured, pasting reflection sheets at the positions of an upper rudder hole and a lower rudder hole of the large linear section, and measuring the end point coordinates of the upper rudder hole, the lower rudder hole and the central line through the total station, wherein the large linear section is a bow section or a stern section.

Step six, converting the control point coordinates obtained by measurement in the step three and the step four into the same coordinate system through the coordinates of the transfer target;

and seventhly, calculating the measured values of the coordinates of the end points of the control point, the upper rudder hole, the lower rudder hole and the central line, comparing the measured values with theoretical values, calculating the X, Y and Z values of the coordinates of each point, normally welding if the difference between all the calculated values and the theoretical values is within the range of +/-5 mm, and adjusting the total section if the difference between any one calculated value and the theoretical value is outside the range of +/-5 mm.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.