KR101687975B1 - Apparatus and method for cuved surface heating line computation of corrugated skin of ship - Google Patents

Abstract

A curved surface shape information analyzing unit for analyzing curved surface shape information of the outer shell of the hull using a curved surface template in the form of a two-dimensional CAD drawing, a result analyzing unit for analyzing the curved surface shape information analyzing unit Dimensional model of the wooden template by using a combination of the plane data and the vertical position data of the wooden template to generate a virtual three-dimensional wooden template Dimensional surface template data of the two-dimensional surface template by analyzing the shape information of the two-dimensional surface template to calculate plane data of the template and inputting and combining the vertical position data described in the surface template to obtain a plurality of A three-dimensional wooden template can be generated.

Description

[0001] APPARATUS AND METHOD FOR CUVED SURFACE HEATING LINE COMPUTATION OF CORRUGATED SKIN OF SHIP [0002]

More particularly, the present invention relates to a hull sheathing curved surface heating line calculating device for calculating a heating line to be subjected to hot working at the time of curving the outer sheath forming the outer surface of a ship, ≪ / RTI >

In general, the shell plating, especially the curved shell plating, is fabricated by machining an iron plate of a certain thickness on a three-dimensional curved surface designed based on engineering techniques such as fluid dynamics, structural dynamics, and vibration.

It can be said that the machining precision of the curved shell plating determines the design performance of the entire ship.

The three-dimensional shape processing of the outer shell of the ship can be roughly classified into mechanical primary cold working using a press or a roller and secondary cold working using residual hot thermal carbon stress by applying heat to the steel plate with a gas torch or the like A two-step machining method is used.

The mechanical first cold working method is mainly used for the curved surface machining of a gentle and simple shell plate having a constant curvature only in one direction and the first machining of a double curved shell plate because of the convenience of the control and the hot working method is a finishing work and a double curved shell plate It is mainly used for secondary processing, deformation of welding deformation and so on.

For example, Patent Literature 1 and Non-Patent Literature 1 described below disclose a technique for machining the outer shell surface of a hull and a technique for predicting a heating line.

Patent Document 1 discloses a method of measuring the shape of a cold-formed member to form a database and automatically generating two three-dimensional curved surfaces by automatically modeling a curved surface shape of a member using data on target shape data and thermal deformation property information of the steel , And a system and method for processing a contour of a hull sheathing surface in which integrated shape information is generated by calculating a shape difference between an object shape and a measurement shape by matching / comparing an optimum curved surface with the generated curved surface to perform a heating operation.

Non-Patent Document 1 describes a technique capable of calculating heating variables such as a heating wire position and a heating rate by using artificial neural networks (ANN) when a desired curved steel plate shape is given in a curving process.

Korean Patent Registration No. 10-0907761 (issued on July 7, 2009)

 'Heat Prediction Technique Using Artificial Neural Network in Song Processing', Journal of the Korean Welding and Joining Society Vol.28 No. 4, 2010. 8., pp.1-4 1225-6153 KCI

On the other hand, in the case of curving the outer shell of a ship by using a hot working method, an operator uses a linear heating method in which heat is applied to a flat plate in a predetermined direction. This method is a method in which a fully- Lt; / RTI >

Here, the wooden template refers to a sample made of wood so as to draw a heating line against an outer plate to be worked on when workers draw curved heating lines.

As described above, since the curved surface machining of the outer shell of the hull is performed by an experienced and experienced worker, it is difficult for a beginner to carry out a surface machining operation requiring precision.

As a result, there has been a problem that it is difficult to supply and receive skilled manpower capable of performing the curved surface working of the outer shell of the hull.

Therefore, it is necessary to develop a technique for automatically calculating the heating line related to the curved surface processing in the flat plate on the CAD system based on the data on the template in place of the wooden template.

An object of the present invention is to provide a hull sheathing curved surface heating line calculating device and a calculating method capable of calculating a heating line relating to a curved surface working in a flat plate during a curved surface working operation of the outer shell of a ship, will be.

Another object of the present invention is to provide a method and apparatus for calculating a curved outer surface curved surface heating line capable of performing a curved outer surface of a hull girder surface through an automatically calculated heating line without depending on experience.

In order to achieve the above object, a method for calculating a curved surface heating line of a hull girder sheath according to the present invention is a method for calculating a curved surface of an outer shell of a hull and a curved surface of a flat plate to be subjected to a curved surface working, Information of the wooden template is obtained from the flat panel using the curvature direction and curvature information, and the heating line on the flat panel surface is calculated using the information of the obtained wooden template.

The method for calculating curved surface heating line of the outer shell of a ship according to the present invention comprises the steps of: (a) executing a CAD program to recall a curved surface template in the form of a two-dimensional CAD drawing to recognize the curved surface template; (b) (C) receiving vertical position data of each point of the wooden template included in the curved surface template, and (d) calculating the vertical position data of the points Dimensional model template by combining the plane data calculated in the step (c) with the vertical position data input in the step (c).

The present invention is characterized by (e) calculating a heating line while comparing a generated virtual three-dimensional wooden template with a flat plate to be subjected to a curved surface machining operation.

The step (e) is characterized by obtaining the information of the wooden template in the flat plate through an isometric expansion method of the curvature information and the curvature information at each point of the wooden template.

Wherein the step (e) includes: (e1) dividing the flat plate into a plurality of grids centering on the vertex of the flat plate, matching the flat data of the wooden template with each lattice, (E2) matching the line data of the wooden template around the plane data of each grid and extracting a plurality of line data based on the direction of the music piece of the wooden template, (e3) And extracting the heating line using the difference between the extracted line data and the line data of the flat plate.

The present invention is further characterized in that (f) hot working is performed along the heating line calculated in the step (e) to process the outer shell surface of the hull sheath.

The hull sheath curved surface heating line calculating apparatus according to the present invention is characterized by calculating the heating line of the hull sheathing curved surface using the hull sheathing curved surface heating line calculating method.

The present invention relates to a curved shape information analyzing unit for analyzing curved shape information of a shellboard using a curved surface template in the form of a two-dimensional CAD drawing, and a method for calculating plane data of a wooden template using the result analyzed by the curved shape information analyzing unit And a vertical template data generation unit for generating vertical template data based on the vertical position data stored in the template storage unit, an input unit for receiving vertical position data described in the curved surface template, and a vertical template data generating unit for generating a virtual three- .

A point coordinate extracting unit for extracting a point coordinate on an outline and a vertical line of a flat plate on which a machining operation is to be performed using the wooden template generated by the wooden template generating unit, And a line calculating unit for calculating a line.

As described above, according to the present invention, the shape data of the two-dimensional curved surface template are analyzed to calculate the plane data of the wooden template, and the vertical position data described in the curved surface template is input It is possible to generate a plurality of three-dimensional wooden template corresponding to the curved surface template.

Thus, according to the present invention, the curved surface of the outer shell of the hull and the curved surface of the flat plate on which the curved surface machining operation is to be performed are mapped, and the curved direction and the curvature information at each point of the target curved surface are obtained by the isometric development method, Can be obtained.

Thus, according to the present invention, it is possible to obtain the effect of calculating the heating line in the flat plate surface by using the information of the obtained wooden template.

Therefore, according to the present invention, it is possible to smoothly perform the curved surface processing depending on the experience with the conventional wooden template, and it is possible to smoothly receive the workforce for performing the curved outer curved surface work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a hull girder sheath heating line calculation apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a process diagram for explaining a stepwise calculation method of a hull girder heating curve calculation apparatus according to a preferred embodiment of the present invention,
3 is an illustration of a curved surface template,
Figs. 4 and 5 are operation states for calculating point coordinates and heating lines on a vertical line by comparing a virtual three-dimensional wooden template and a flat to be processed. Fig.

Hereinafter, an apparatus and method for calculating curved outer surface curvature line according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a hull girder outside curved surface heating line calculating apparatus according to a preferred embodiment of the present invention.

The hull sheath heating wire calculating apparatus according to the preferred embodiment of the present invention calculates the plane data of the wooden template in the curved surface template and combines the calculated plane data and the vertical position data to generate a virtual three dimensional wooden template, Calculate the heating line of the hull girder curved surface in comparison with the plate to be performed.

To this end, as shown in FIG. 1, the apparatus 10 for calculating the curvature of a hull girder sheath according to a preferred embodiment of the present invention analyzes the curved shape information of the hull sheathing using a curved surface template in the form of a two- A plane data calculation unit 30 for calculating plane data of the wooden template using the analyzed result, an input unit 40 for receiving the vertical position data described in the curved surface template, A tree template generating unit 50 for generating a virtual three-dimensional wooden template by combining the data and the vertical position data, and extracting the outline of the flat plate on which the machining operation is to be performed and the point coordinates on the vertical line using the generated wooden template A point coordinate extracting unit 60 and a heating line calculating unit 70 for calculating a heating line using the extracted point coordinates.

2 to 5, a method of calculating a long-term heating line calculating time according to a preferred embodiment of the present invention will be described in detail.

FIG. 2 is a process diagram for explaining the method of calculating the curved outer surface curved surface heating line calculating apparatus according to the preferred embodiment of the present invention.

Figs. 4 and 5 are operation state diagrams for calculating point coordinates and heating lines on a vertical line by comparing a virtual three-dimensional wooden template and a plate on which a machining operation is to be performed. Fig. 3 is an example of a curved surface template.

In the step S10 of Fig. 2, the outer shell curvature heating line calculating device 10 executes the CAD program and recalls the curved surface template 11 in the form of a two-dimensional CAD drawing.

3, the curved surface template 11 includes vertically positioned data 12 of the points 13 included in the curved surface 12 of the wooden template and the curved surface 12 of the wooden template so as to create the wooden template, , I.e., the z coordinate value.

In this case, the plane data of the template points of the tree template, that is, the x and y coordinate values, are not specified in the curved surface template 11.

Therefore, a plurality of, for example, four, wooden template can be corresponded to the curved surface template 11.

In step S12, the curved surface shape information analysis unit 20 analyzes the recognized shape information of the curved surface template, and the plane data calculation unit 30 calculates a point on the outline and the vertical line included in the wooden template using the analyzed shape information (Step S14).

In step S16, the input unit 40 receives the vertical coordinate values, i.e., the z coordinate values, of the points on the outline and the vertical line described in the curved surface template 11 from the operator.

Then, the tree-structured template generating unit 50 combines the plane data of the wooden template calculated by the plane data calculating unit 30 and the vertical position data on the curved surface template input through the input unit 40 to correspond to the curved surface template 11 Dimensional tree template is generated (S18).

As described above, according to the present invention, the plane data of the wooden template is analyzed by analyzing the shape information of the two-dimensional curved surface template, the vertical position data described in the curved surface template is inputted and combined to generate a plurality of three-dimensional wooden template corresponding to the curved surface template can do.

In step S20, the point coordinate extraction unit 60 matches the plane data of the wooden template, that is, the x, y coordinate values, to the flat surface 15 to be subjected to the curved surface machining operation.

4, the point coordinate extraction unit 60 divides the flat plate 16 into a plurality of grids centering on the vertexes 16 of the flat plate 15, Matches the x, y coordinate values of the template.

5, the heating line calculating unit 70 matches the line data of the wooden template around the x, y coordinate values of the respective grids 17, and calculates a plurality of And extracts the line data.

The heating line calculating unit 70 calculates the heating line 18 using the difference between the line data of the extracted wooden template and the line data of the flat plate 15 (S22).

Thus, the operator can form a curved surface of the outer shell of the hull by curving the flat plate using the calculated heating wire information (S24).

According to the present invention, the curved surface of the outer shell of the hull and the curved surface of the flat plate to be curved are to be mapped, and the curved direction and the curvature information at each point of the target curved surface are converted into isometric (isometric) method to obtain the information of the tree template from the reputation.

Accordingly, the present invention can calculate the heating line in the flat plate surface using the information of the obtained wooden template.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to a technique of calculating planar data of a wooden template using a two-dimensional curved surface template and acquiring a three-dimensional objective curved outer plate surface using a virtual three-dimensional wooden template generated by combining with vertical positional data.

10: Hull outer curved surface heating line calculating device
11: Surface Template 12: Curved Surface of Wooden Template
13: Point included in the curved surface information 14: 3-dimensional object hull curved surface
15: flat plate 16: vertex of flat plate
17: Outer line point 18: Heating wire
20: Curved surface shape information analysis unit 30: Planar data calculation unit
40: Input unit 50: Wood template generating unit
60: Point coordinate extraction unit 70: Heating line calculation unit

Claims (9)

(a) executing a CAD program to recall a curved surface template of a two-dimensional CAD drawing form in which the x, y coordinate values of the plane data of the wooden template images are not specified,
(b) analyzing the shape information of the curved surface template, calculating plane data of the points included in the wooden template using the analyzed shape information,
(c) receiving vertical position data of each point of the wooden template included in the curved surface template,
(d) generating a virtual three-dimensional wooden template by combining the plane data calculated in the step (b) and the vertical position data inputted in the step (c); and
(e) calculating a heating line while comparing the generated virtual three-dimensional wooden template with a flat plate to be subjected to a curved surface machining operation,
The information of the wooden template in the flat plate is obtained by using the curved surface of the outer shell of the desired hull and the curved surface of the flat plate on which the curved surface machining operation is to be performed and using the curved direction and curvature information at each point of the target curved surface, And calculating the heating line in the flat plate curved surface by using the information of the curved outer surface curved surface heating line. delete delete The method according to claim 1,
Wherein the step (e) acquires the information of the wooden template from the flat plate through an isometric expansion method of the curvature direction and the curvature information at each point of the wooden template, . 2. The method of claim 1, wherein step (e)
(e1) dividing the flat plate into a plurality of grids centering on the vertex of the flat plate, matching the flat data of the wooden template with each grid, and matching the flat data of the wooden template to a flat step,
(e2) matching the line data of the wooden template around the plane data of each grid, extracting a plurality of line data based on the music direction of the wooden template,
(e3) extracting the heating line using the difference between the extracted line data and the line data of the flat plate. The method according to claim 1,
further comprising the step of: (f) performing a hot working along the heating line calculated in the step (e) to process the curved outer surface of the hull sheathing. A method for calculating a heating wire of a hull sheathing curved surface using the hull sheathing curved surface heating line calculating method according to any one of claims 1 to 6. 8. The method of claim 7,
A curved shape information analyzing unit for analyzing curved shape information of the outer shell of the hull using a curved surface template in the form of a two-dimensional CAD drawing,
A planar data calculation unit for calculating planar data of the wooden template using the result analyzed by the curved shape information analysis unit,
An input unit for receiving vertical position data described in the curved surface template,
And a wooden template generating unit for generating a virtual three-dimensional wooden template by combining the plane data and the vertical position data of the wooden template. 9. The method of claim 8,
A point coordinate extraction unit for extracting the outline of the flat plate on which the machining operation is to be performed and the point coordinates on the vertical line using the wooden template generated by the wooden template generating unit;
And a heating line calculating unit for calculating a heating line using the point coordinates extracted by the point coordinate extracting unit.

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