CN111414655A

CN111414655A - Method for splicing plate splicing drawings

Info

Publication number: CN111414655A
Application number: CN202010276996.4A
Authority: CN
Inventors: 伍广兴; 吴蓉蓉; 李辉
Original assignee: Guangzhou Wenchong Shipyard Co Ltd
Current assignee: Guangzhou Wenchong Shipyard Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-14
Anticipated expiration: 2040-04-10
Also published as: CN111414655B

Abstract

The invention discloses a method for splicing plate splicing diagrams, which comprises the steps of obtaining plate drawing data in SPD software, identifying coded information of plates from the plate drawing data, determining the plates to be spliced according to the coded information, calling outline identification data of the plates to be spliced, screening out a point which is closest to or farthest from an origin of coordinates from the outline identification data, taking the point as a part coordinate of the plates, inserting the parts to be spliced into the same coordinate system according to the part coordinate, and generating the plate splicing diagram drawing. The method has high accuracy and high running speed, can be realized by most of the conventional development tools, and can quickly and effectively solve the problem of efficiency of production design.

Description

Method for splicing plate splicing drawings

Technical Field

The invention relates to the technical field of splicing of plate splicing diagrams, in particular to a method for splicing the plate splicing diagrams.

Background

At present, most ships are steel ships, the main body structure of the ship body is formed by welding steel plates and profiles, and the steel plates are flat steel with large width-thickness ratio and large surface area. The general steel of the main structure of the ship is generally 6 mm-50 mm, the specification of the whole steel plate is expressed by the thickness, width and length in millimeters, and in the ship industry, the plate is also referred to as the steel plate.

The plate splicing board is formed by splicing two or more steel plates by welding materials on the flat ground, is an indispensable process in ship construction, and is a guide file of the plate splicing process. The plate splicing process is carried out after the plate is subjected to numerical control blanking and before other components are assembled, and because the steel plate can be contracted and deformed after being welded, when a constructor carries out plate splicing according to a plate splicing diagram, the front and rear sizes of the plate splicing must be measured, the rear precision of the plate splicing is strictly controlled, and the production quality is ensured.

Because the splicing diagram function of the SPD design system does not consider factors such as plate allowance and welding shrinkage, the generated splicing diagram has large errors and cannot be used for construction.

At present, plate splicing drawings are manually made by designers, parts are exported from an SPD building system, a dxf file (which can be opened by AutoCAD) is exported from each part library, part drawings in the files are displayed in a block form, each part is a block, the name of the block is a part code, and the block codes are arranged and placed according to the size of a CAD block and a specific interval, as shown in FIG. 1; all part block base points are the lower left corner of the part size, not the origin of coordinates for the structural model, as shown in FIG. 2; the designer can only select all parts needing to be jointed one by one, and finally, the parts of the jointed boards are translated to proper positions and are spliced together artificially. The phenomenon such as splice dislocation or error and leakage can easily appear in artifical concatenation, and production design is inefficient moreover.

Disclosure of Invention

The invention aims to provide a method for splicing a plate splicing diagram with high accuracy and high running speed.

The invention relates to a method for splicing a panel splicing chart, which comprises the following steps:

step 1: acquiring sheet drawing data in SPD software;

step 2: identifying the coded information of the plates from the plate drawing data, and determining the plates to be spliced according to the coded information;

and step 3: calling outline identification data (OUTSOUR) of the plates to be spliced;

and 4, step 4: screening out a point which is closest to or farthest from the origin of coordinates from the profile identification data, and taking the point as the part coordinates of the plate;

and 5: and inserting the parts to be spliced into the same coordinate system according to the part coordinates to generate a splicing drawing.

The splicing method of the plate splicing drawing is based on plate drawing data (dxf format) generated by SPD software, judges whether splicing is performed or not according to a corresponding plate coding rule, calculates coordinates of parts in the plate, inserts specified blocks in batches and generates the splicing drawing rapidly, so that the accuracy is high, the operation speed is high, the SPD designed splicing drawing is realized in AutoCAD very effectively, and the production design efficiency is improved. And the realization process is simple and easy to implement, and can be realized by most of the existing development tools, such as secondary development of AutoCAD VBA. The method can obtain the positioning of the plate part block by means of simple contour data, can be used in various specialized software of a ship body, and has certain reference value for data conversion and analysis of other specialties. The SPD software jigsaw map is automatically generated under the condition of function defects of the SPD design software jigsaw map, so that errors of manual operation are avoided, and the production efficiency and the positioning accuracy are greatly improved.

Drawings

FIG. 1 is a diagram of parts exported by an SPD building system of the background art;

FIG. 2 is a schematic diagram of a base point of a SPD-derived part block in the background art;

FIG. 3 is a schematic flow chart of the method of the present invention.

Detailed Description

First, a coordinate of an inflection point of the outer contour of the part closest to the origin of coordinates is defined as a part coordinate. As a preferred scheme, programming can be completed through an AutoCAD VBA secondary development technology or other development tools, a panel mosaic drawing is automatically generated in batches, and an operation flow chart is shown in fig. 3, and the panel mosaic drawing splicing method provided by the invention comprises the following steps:

step 1: acquiring sheet drawing data in SPD software;

and step 3: calling outline identification data of the plates to be spliced;

and 5: and inserting the parts to be spliced into the same coordinate system according to the part coordinates to generate a jigsaw drawing.

Firstly, dividing the plate drawing data into a plurality of part drawing unit data by adopting a preset boundary.

Specifically, the "- - - - - - - -" line segment is used as the boundary of each piece of part diagram unit data, and each piece of part diagram unit data is analyzed and processed one by one subsequently, so that the precision and the processing speed can be improved.

Further, according to the part drawing unit data obtained by splitting, extracting the first line of data in each part drawing unit data one by one, and acquiring the final character string as the part name; and then, extracting the part contour data in each unit data one by one according to the separated unit data of the part drawing.

Specifically, the last character string of the first row of data is acquired to obtain the part name, and all contour data of the part drawing unit data are extracted by taking the 'OUTSOUR' character string as the identifier.

Furthermore, by utilizing the coding rule of the ship structure, the plate parts needing to be jointed into plates are coded in the same part, and only the part numbers are different, such as the part A-D01A-W1 and the part A-D01A-W2, so that whether the plate needs to be jointed into plates currently is analyzed.

Specifically, the part name and the part number on the coding information of each part drawing unit data are analyzed, and if the plate names exist and the part names are consistent and only the part numbers are different, the two parts are considered to need to be jointed. Because the coding rules of various shipyards are different, whether the parts are spliced or not can be analyzed according to the actual coding rules.

Further, the contour data of all the parts are converted into two-dimensional coordinate data, and the distance between the inflection point and the origin of coordinates is calculated by using the Pythagorean theorem

；

Then, the distances of the inflection points are compared one by one to obtain the inflection point with the minimum distance, namely the coordinate point of the plate part,

the value is the linear distance of the inflection point from the origin of coordinates.

Specifically, by extracting coordinates of inflection points of the contour of the part, the coordinate values are converted into diameter distances between the inflection points and the origin of coordinates, then the sizes of the inflection points are compared, and the coordinates of the inflection points with the minimum value are taken and defined as the coordinates of the part.

And further, inserting part blocks in batches according to the part names by using the AutoCAD VBA secondary development or other development technologies, wherein the insertion points of the part blocks are the coordinate values of the parts, and then moving the whole jigsaw puzzle into the pointing frame as required.

Specifically, through the secondary development of AutoCAD VBA or other development technologies, inserting the AutoCAD blocks in batches according to the part names and the part coordinates to generate a board splicing drawing; the jigsaw puzzle is then moved into the designated frame as needed.

Finally, whether the parts are jointed or not is judged on the basis of a plate file and a part diagram (dxf format) generated by SPD software by taking a part coding rule as a basis, the coordinates of the parts are calculated, and the specified blocks are inserted in batches to quickly generate the jointed plate diagram.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A method for splicing a panel splicing chart is characterized by comprising the following steps:

step 1: acquiring sheet drawing data in SPD software;

and step 3: calling outline identification data of the plates to be spliced;

2. The method for splicing the panel mosaic according to claim 1, wherein in step 1, before the panel drawing data in the SPD software is obtained, the panel drawing data is split in the SPD software to obtain a plurality of part drawing unit data.

3. The method for splicing the panel splicing chart according to claim 2, wherein in the step 1, the SPD software firstly splits the panel drawing data, specifically, splits the panel drawing data by using a preset dividing line.

4. The method for splicing the board mosaic according to claim 2, wherein in step 1, each piece of part map unit data is encoded, and the encoded information comprises the name of the board, the name of the part and the serial number of the part.

5. The method for splicing the panel charts according to claim 4, wherein in the step 2, the coded information of the panels is identified from the panel drawing data, the panels to be spliced are determined according to the coded information, specifically, the part names and the part numbers of the coded information of each piece of part drawing unit data are analyzed, and if the part names exist and the part names are consistent and only the part numbers are different, the two parts are considered to be spliced.

6. The method for splicing the panel splicing chart according to claim 5, wherein in the step 4, a point which is the closest or the farthest to the origin of coordinates is screened from the contour identification data and is used as the part coordinates of the panel, the method comprises the steps of converting the contour data of all the parts into two-dimensional coordinate data, and calculating the distance between the inflection point and the origin of coordinates by using the Pythagorean theorem

；

the point is the distance of the inflection point.

7. The method for splicing the panel splicing maps according to claim 6, wherein in the step 4, specifically, by extracting coordinates of inflection points of the contour of the part, coordinate values are converted into diameter distances of the inflection points from the origin of coordinates, and then the diameter distances of the inflection points from the origin of coordinates are compared, and the coordinates of the inflection points with the minimum value are taken and defined as the coordinates of the part.

8. The method as claimed in claim 7, wherein in step 5, the parts to be assembled are inserted into the same coordinate system according to the part coordinates to generate the assembly drawing, the assembly drawing comprises inserting part blocks in batches according to the part names, the insertion points of the part blocks are the part coordinate values, and then, moving the assembly drawing integrally into the pointing frame according to the requirements.

9. The method as claimed in claim 8, wherein the step 5 further comprises inserting the part blocks in batches according to the part names and the part coordinates to generate the jigsaw map, and then moving the jigsaw map to the designated frame as required.