KR101099697B1 - Automatic design system for welding margin sub-assembly part and method of thereof and record media recorded program for realizing the same - Google Patents

Abstract

Disclosed are a system and method for automatic welding margin design of small elements and a recording medium having stored thereon a program for implementing the same. According to an aspect of the present invention, a method for designing a welding margin of the automatic welding margin design system of a small member, the method comprising: receiving a reverse engineering target file and a property information file; Generating an outline using the reverse design target file and generating an element network in the outline; Calculating the deformation amount of the small member by using the property information file; Generating an inverse shape including a welding margin by inputting the welding deformation amount and a temperature value into the mesh; And generating a reverse design shape file in which the reverse shape is reflected.

Description

AUTOMATIC DESIGN SYSTEM FOR WELDING MARGIN SUB-ASSEMBLY PART AND METHOD OF THEREOF AND RECORD MEDIA RECORDED PROGRAM FOR REALIZING THE SAME}

The present invention relates to a method for designing automatic welding margin of a small member, and in particular, the present invention relates to a system, a method for automatically designing a welding margin, and a recording medium storing a program for implementing the same.

In general, the ship's construction is produced by dividing it into the form of a block. At this time, the number of blocks are required for the construction of a ship dozens ~ hundreds. The block is then assembled from tens to hundreds of small assembly members. The subassembly members exist in a wide variety of shapes depending on the shape of the block and include angles, built-ups, flat bars, and the like. The small assembling member is also called small member.

The built-up includes a song build-up having a 'T' shape in cross section, and the song build-up is completed by vertically assembling a flange and a web. Then, the grain build-up is produced through the welding operation to the welding portion 5, which is the place where the flange 1 and the web 3 meet, as shown in Figs. The grain build-up inevitably causes bending deformation in the fabrication process, which causes the shape to shrink as compared with the original design due to the shrinkage deformation caused by the welding operation. The song build-up process performs the bending work to correct the bending deformation by heat machining to return the song build up to the original design shape after welding.

Therefore, not only the music built-up but also the assembling members which are made vertically by the flange and the web and manufactured by welding work, bending work inevitably occurs due to bending deformation. Accordingly, the song built-up production process has to perform the work of the weaving, there is a problem that the additional cost for doing the weaving work, the productivity is lowered. Conventionally, there has been a case of performing the reverse design manually to reduce the bending work, but the accuracy is inferior, and the method is also difficult, so the problem that the reverse design can not be practically reflected.

According to the related art, the problem can only be solved for the music work of the song built-up, and the music work of the small assembly member cannot be solved.

In the conventional design work, only a file created in the ESSI file format, which is a design file, is applicable, and thus other files used in the design cannot be applied. In addition, in the conventional case, user selection is required for each application member, and the user needs to know basic information in advance in order to calculate a welding margin application amount. Here, the basic information includes the material of the member, the width and thickness of the flange, the thickness of the web, and the like.

The present invention is to predict the bending caused by the welding work in advance to expand the contraction to the shape of the object to be designed so that the automatic welding margin design system of the small member that can improve the productivity without performing the bending work after welding, The present invention provides a method and a recording medium storing a program for implementing the same.

In addition, the present invention is a small member automatic welding margin design system, method and a program for implementing the same that can be provided with the reverse engineering shape file including the welding margin automatically when the reverse engineering target file and the physical properties information file is input It is to provide a recording medium.

According to one aspect of the present invention, a method of designing a welding margin is provided by an automatic welding margin design system of a small member.

According to an embodiment of the present invention, a method for designing a welding margin of the automatic welding margin design system of a small member, the method comprising: receiving a reverse engineering target file and a property information file; Generating an outline using the reverse design target file and generating an element network in the outline; Calculating a welding deformation amount of the element using the property information file; Generating an inverse shape including a welding margin by inputting the welding deformation amount and a temperature value into the mesh; And generating a reverse design shape file in which the reverse shape is reflected.

The reverse design object file reflects the shape of the reverse design object, and the property information file includes property information of the element composed of material and thickness of the element.

Here, generating the outline using the reverse engineering target file, and generating the element network in the formed outline, parsing the reverse engineering target file to extract lines and points constituting the shape; Generating an outline using the lines and points; And generating a face within the outline and generating the mesh.

On the other hand, the step of calculating the welding deformation amount of the small member using the physical property information file, parsing the physical property information file to extract the material and thickness of the small member; Calculating a coefficient of linear expansion using a material, thickness, and ambient temperature of the element; And generating a weld deformation amount by applying a negative sign to the linear expansion coefficient.

Here, the ambient temperature may be extracted using the date when the reverse engineering target file and the property information file are input.

The generating of the inverse shape including the welding margin by inputting the welding deformation amount and the temperature value into the mesh may include calculating the reverse deformation amount by inputting the welding deformation amount and the temperature value into the mesh. Calculating positions and shapes of lines and points to be moved by the welding margin using the calculation result; And generating the inverse shape using the lines and points.

In addition, the temperature value may be calculated using the thickness of the element.

The generating of the reverse design shape file reflecting the reverse shape may include generating the reverse design shape file in which the reverse shape is reflected and in the same file format as the reverse design target file.

On the other hand, generating a surface in the outline, and generating the element network, parsing the reverse design target file to extract the position of the line existing in the outline; Generating an inner line in the outline using the position of the line; And generating the surface by dividing the inside of the outline using the inner line, and generating the mesh.

The generating of the inverse shape including the welding margin by inputting the welding deformation amount and the temperature value into the mesh may include extracting a central point using the inner line; Calculating a reverse strain amount by inputting a weld strain amount, a temperature value and the center point into the mesh; Calculating positions and shapes of lines and points to be moved by the welding margin using the calculation result; And generating an inverse shape using the lines and points.

The extracting the central point using the inner line may include: determining at least one inner line generated in the outline as a single line; Extracting a center point from the single line; And constraining the central point.

In addition, according to another aspect of the present invention, a system for designing an automatic welding margin of a small member is provided.

According to an embodiment of the present invention, a system for designing an automatic welding margin of a small member, the system comprising: a welding deformation controller for generating a welding deformation amount of the small member by calculating using an input property information file; And a shape deriving control unit for generating a mesh by using the received reverse engineering target file and inputting the welding deformation amount received from the welding deformation controller to generate a reverse engineering shape file. A weld margin design system is provided.

The welding margin design system further includes a file input / output unit configured to receive the reverse engineering target file and the property information file and output the reverse engineering shape file.

In addition, the welding margin design system includes a physical property information extraction unit for parsing the property information file to extract the material and thickness of the small member, and transmits the material and thickness of the extracted small member to the welding deformation controller; And a design information extracting unit which parses the reverse engineering target file to extract lines and points constituting the shape and transmits the extracted lines and points to the shape derivation control unit.

The welding deformation control unit calculates a linear expansion coefficient using the material, the thickness, and the ambient temperature of the element, and generates the welding deformation amount by applying a negative sign to the linear expansion coefficient.

Here, the shape deriving control unit generates the mesh in the outline generated by using the line and the point, input the welding deformation amount and the temperature value to the mesh to generate an inverted shape, reflecting the inverse Generate the reverse engineered shape file.

The design information extracting unit parses the reverse design target file and extracts a position of a line existing in the outline.

The shape derivation control unit generates an internal line in the outline using the position of the line, and generates the element network by dividing the inside of the outline using the internal line.

The shape derivation control unit may determine at least one inner line generated in the outline as a single line, constrain the center point extracted from the single line, and input the center point into the mesh to form the inverse shape. Create

On the other hand, according to another aspect of the present invention, a program of instructions on how to design the welding margin of the automatic welding margin design system of the small member is implemented, there is provided a recording medium that can be read by the automatic welding margin design system do.

According to an embodiment of the present invention, a program of instructions on how to design a welding margin in a small automatic welding margin design system is implemented, and as a recording medium which can be read by the automatic welding margin design system, Receiving a design target file and a property information file; Generating an outline using the reverse design target file and generating an element network in the outline; Calculating a welding deformation amount of the element using the property information file; Generating an inverse shape including a welding margin by inputting a welding deformation amount and a temperature value into the mesh; And a program storing the program for implementing the automatic welding margin design method of the element, comprising the step of generating a reverse design shape file reflecting the reverse shape.

The automatic welding margin design system, method, and recording medium for storing the program for implementing the same according to the present invention can predict and reflect the bending deformation occurring in the production process before performing the welding operation. There is no need to perform additional bending work afterwards, resulting in an increase in productivity.

In addition, the recording medium storing the automatic welding margin design system, method and a program for implementing the element according to the present invention is a reverse design shape file including a welding margin when the user inputs only the reverse design target file and the property information file The user's convenience may be improved, resulting in an improved user convenience.

Hereinafter, an embodiment of an automatic welding margin design system, a method for designing a small member according to the present invention, and a recording medium storing a program for implementing the same will be described in detail with reference to the accompanying drawings. The same or corresponding components will be given the same reference numerals and redundant description thereof will be omitted.

A welding margin design system according to the present invention will be described with reference to FIG. 3. Figure 3 is a block diagram showing a welding margin design system according to an embodiment of the present invention.

Referring to FIG. 3, the welding margin design system 100 includes a pile input / output unit 10, a physical property information extracting unit 20, a design information extracting unit 25, an input temperature management unit 30, and a welding deformation controller 40. , A shape derivation control unit 45, a display unit 50, an inverse shape management unit 55, and an error management unit (not shown).

The file input / output unit 10 receives a property information file and a reverse design target file from a user. Here, the physical property information file includes the physical property information of the small member such as the material and the thickness of the small member according to the type of the small member, and the thickness of the small member includes the thickness of the flange and the web. In addition, the property information file may be different from the file used in the marine sector and the shipbuilding sector. For example, the marine part may use a BOM file used in EXCEL, and the shipbuilding sector may use the XML file used in the CAD system. You can use the file. On the other hand, the reverse engineering target file reflects the original shape of the small member to be manufactured, that is, the shape of the reverse engineering target. Here, the reverse engineering target file may be different from the file used in the offshore sector and the shipbuilding sector. For example, the DXF file used in the CAD system may be used in the offshore sector, and the XML file used in the CAD system may be used in the shipbuilding sector. . Accordingly, the welding margin design system 100 may use a variety of property information files and reverse design target files, so that the welding margin design system 100 may use a wider range of use.

The property information extraction unit 20 parses the property information file received from the file input / output unit 10 to extract the material and thickness of the element. Then, the physical property information extraction unit 20 transmits the material and thickness of the extracted small member to the welding deformation controller 40. On the other hand, it is preferable to use the name of the element to be used as the name of the reverse engineering target file. This is because the reverse design target file should be used as the name of the element so that the thickness and material of the element can be automatically extracted by comparing it with the element name stored in the property information file.

The design information extracting unit 25 parses the reverse design target file received from the file input / output unit 10 and extracts points and lines. The design information extraction unit 25 transmits the extracted points and lines to the shape derivation control unit 45.

In addition, the design information extraction unit 25 parses the reverse design target file to extract the position of the line existing in the outline, and transmits the position of the extracted line to the shape derivation control unit 45.

The input temperature manager 30 recognizes the date when the property information file and the reverse design target file are input from the file input / output unit 10 and extracts the ambient temperature. The input temperature manager 30 stores an average temperature value for each date, and when the date is provided, the input temperature manager 30 may extract the ambient temperature matching the date. In addition, the input temperature management unit 30 transmits the extracted temperature value to the welding deformation controller 40.

The welding deformation controller 40 calculates a linear expansion coefficient corresponding to the amount of shrinkage by welding using the material, the thickness of the element received from the physical property information extracting unit 20, and the ambient temperature received from the input temperature management unit 30. . And the welding deformation control part 40 calculates the welding deformation amount which applied the negative code to the linear expansion coefficient, and transmits the calculated welding deformation amount to the shape derivation control part 45. FIG. On the other hand, the weld deformation control unit 40 calculates the temperature value using the thickness of the small member and transmits it to the shape derivation control unit 45.

When the cross-sectional shape of the small member is a T type, the shape derivation control unit 45 generates a mesh at the same time using the points and lines received from the design information extracting unit 25 to generate a mesh. The shape derivation control unit 45 calculates the inverse strain amount by inputting the temperature value and the weld strain amount into the generated element network.

Meanwhile, when the cross-sectional shape of the small member is one of the L type and the T type, the shape derivation control unit 45 generates an inner line in the outline using the position of the line received from the design information extracting unit 25. The shape derivation control unit 45 generates a plane by dividing the inside of the outline by using the generated internal line, and generates a mesh. The shape derivation control unit 45 determines the at least one inner line generated in the outline as a single line and extracts a center point from the single line. The shape derivation control unit 45 calculates an inverse strain amount by inputting a weld deformation amount, a temperature value, and a center point into the mesh.

The shape derivation control unit 45 generates an inverse shape by using the calculation result and generates an inverse design shape file that reflects the generated inverse shape. The shape derivation control unit 45 transmits the reverse design phase file to the file input / output unit 10, and the file input / output unit 10 outputs the reverse design shape file.

The display unit 50 displays a process performed by the welding deformation control unit 40 and the shape derivation control unit 45. For example, the display unit 50 may display a process of calculating the linear expansion coefficient and a process of generating the weld deformation in the weld deformation controller 40. The display unit 50 may display a process of generating an outline, an inner line, a mesh, and an inverse shape in the shape derivation control unit 45. In addition, the display unit 50 may display a user interface (UI) to receive the reverse engineering target file and the property information file from the user. At this time, the user checks the display items displayed through the display unit 50 and inputs the reverse design target file and the property information file through the file input / output unit 10.

The inverse shape management unit 55 stores and manages the inverse design shape file generated from the shape derivation control unit 45.

If the error management unit generates an error in at least one of the physical property information extraction unit 20, the design information extraction unit 25, the welding deformation control unit 40, the shape derivation control unit 45, and the input temperature management unit 30, an error occurs. Save and manage the occurrence.

A welding margin design method according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. First, a method of designing a welding margin according to an embodiment of the present invention will be briefly described with reference to FIG. 4. 4 is a flow chart briefly illustrating a method of designing a welding margin according to an exemplary embodiment of the present invention.

The welding margin design system 100 receives the property information file and the reverse design target file from the user as shown in FIG. 4 (S10). Here, the physical property information file may include a material and a thickness of a small member, and the reverse engineering target file may be a CAD file containing a design design regarding a circular shape of a target to be reverse engineered.

In addition, the welding margin design system 100 generates an outline using points and lines of the reverse design target file, generates a surface in the formed outline, and generates an element network at step S30.

Next, the welding margin design system 100 calculates the linear expansion coefficient using the material and the thickness of the small member of the physical property information file, and calculates the welding deformation amount using the linear expansion coefficient (S50). And, the welding margin design system 100 calculates the temperature value using the thickness of the element.

Thereafter, the welding margin design system 100 generates an inverse shape including the welding margin by inputting a welding deformation amount and a temperature value into the mesh. Here, the welding margin refers to the difference between the shape to be designed and the shape in which the small member is contracted by welding. Therefore, since the reverse shape is designed to be as large as the welding margin using the welding deformation amount and the temperature value, even if the welding operation is performed on the small member, it is not necessary to additionally perform the bending operation as in the prior art, thereby improving the work efficiency.

Finally, the reverse design shape file reflecting the reverse shape is generated (S90).

Hereinafter, a method of designing a welding margin according to an embodiment of the present invention will be described in detail with reference to FIG. 5. 5 is a flow chart showing in detail a method for designing a welding margin according to an embodiment of the present invention.

Referring to FIG. 5, the file input / output unit 10 receives a reverse design target file and a property information file from a user (S111). At this time, the reverse engineering target file may be a CAD file containing a design design for the circular shape of the target to be reverse engineered. The property information file contains the material and thickness of the element. In this case, the reverse design target may have a T-shaped cross-sectional shape.

Next, the design information extracting unit 25 parses the reverse design target file received from the file input / output unit 10 and extracts geometric information of points and lines required for welding margin design (S113). The design information extracting unit 25 transmits the extracted geometric information of the points and lines to the shape deriving control unit 45. Here, the geometric information of the points and lines indicates the position and shape of the points and lines.

Thereafter, the shape derivation control unit 45 generates an outline using the geometric information of the points and the lines received from the design information extraction unit 25 (S115). Specifically, the shape derivation control unit 45 grasps the position and shape of the points and lines, and generates the outline by connecting the points and the lines.

In addition, the shape derivation control unit 45 generates a surface in the generated outline and generates a surface at the same time to form a mesh (S117). In this case, the type of meshes formed includes planar triangles, square elements, and two-dimensional beam elements. Here, planar triangular and rectangular elements are used to model the web part and two-dimensional beam elements are used to model the flange part. In addition, the two-dimensional beam element may calculate a thermal deformation by inputting a temperature, and by using the same, a reverse design shape may be derived by inputting a welding deformation amount and an appropriate temperature value corresponding to the flange portion.

On the other hand, the physical property information extraction unit 20 parses the physical property information file received from the file input and output unit 10 to extract the material and thickness of the small member (S119).

Then, the input temperature management unit 30 recognizes the date that the reverse design target file and the property information file are input to the file input / output unit 10 and extracts the ambient temperature (S121). In other words, the input temperature manager 30 stores an average temperature value for each date. Accordingly, the input temperature manager 30 may extract the ambient temperature matching the recognized date. The input temperature management unit 30 transmits the extracted ambient temperature to the welding deformation controller 40.

The welding deformation controller 40 calculates a linear expansion coefficient by using the material and thickness of the small member received from the physical property information extractor 20 and the ambient temperature received from the input temperature manager 30 (S123). That is, the welding deformation control unit 40 calculates the linear expansion coefficient by inputting the material of the small member, the thickness of the web, and the ambient temperature in an equation capable of obtaining the linear expansion coefficient. The welding deformation control unit 40 generates a welding deformation amount by applying a negative sign to the linear expansion coefficient. Here, since the coefficient of linear expansion represents the shrinkage of the small member, the amount of weld deformation generated by applying a negative sign to the coefficient of linear expansion may represent the amount of expansion of the small member. Since the linear expansion coefficient has a negative sign because it represents the shrinkage of the element, when the negative sign is applied to the linear expansion coefficient, the weld deformation amount finally has a positive sign.

The welding deformation controller 40 calculates a temperature value by using the thickness of the small member received from the physical property information extracting unit 20 (S125). That is, the welding deformation control unit 40 calculates the temperature value by substituting the thickness of the flange in an equation that can obtain the temperature value.

Thereafter, the shape derivation control unit 45 receives the welding deformation amount and the temperature value from the welding deformation amount control unit 40. The shape derivation control unit 45 inputs a welding deformation amount and a temperature value into the element network, and calculates an inverse strain amount through a finite element method (FEM) (S127). Such a technique related to finite element analysis corresponds to a known technique that is widely known and used in the art, and a detailed description thereof will be omitted.

Then, the shape derivation control unit 45 calculates the position and shape of the line and the point to be moved by the welding margin using the calculation result (S129). Thereafter, the shape derivation control unit 45 forms an outline by connecting the calculated lines and points to generate an inverse shape (S131).

Next, the shape derivation control unit 45 generates a reverse design shape file reflecting the inverse shape (S133). At this time, the shape derivation control unit 45 generates the file format of the reverse engineering shape file in the same manner as the file format of the reverse engineering target file. In addition, the inverse shape management unit 55 stores and manages the inverse design shape file generated by the shape derivation control unit 45. In addition, the file I / O unit 10 outputs the generated reverse design shape file.

Meanwhile, the error management unit stores and manages an error occurrence situation when an error occurs during the process of designing a welding margin. If an error occurs during the process of designing the welding margin, the welding margin design system 100 stops the process and the user cannot check the error. Therefore, the error occurrence situation is stored so that a user can check when an error occurs. The error management unit may define and store a situation in which an error may occur in advance.

In addition, the display unit 50 displays a progress of the welding margin design system 100. The reason for displaying the progress on the display unit 50 is to inform the user of the progress of the welding margin design system 100 so as to inform the progress of the welding margin design system 100.

In the above description, only the automatic welding margin design method of the small member according to an embodiment of the present invention has been described. However, the automatic welding margin design method of the small member may be read through a computer by implementing a program of instructions for executing the type. Those skilled in the art will readily appreciate that the present invention may be provided in a recording medium (eg, hard disk, CD-ROM, etc.).

6 to 9, a method of generating a reverse shape when the shape deriving control unit of the welding margin design system is a T-shaped cross section of the small member will be described.

As shown in FIG. 6, the shape derivation control unit 45 generates an outline of an object to be reversely designed, for example, having a thickness T1 of 20 and a length L1 of 200. The shape derivation control unit 45 forms a mesh at the same time as forming a surface inside the outline is formed as shown in FIG. As shown in FIG. 8, the shape derivation control unit 45 inputs a welding deformation amount and a temperature value into the element network, and when the analysis is performed through finite element analysis, the flange 1 is formed to expand. Finally, the shape derivation control unit 45 generates an inverse shape as shown in FIG. 9. At this time, the thickness T2 of the reverse shape is formed to be the same as the thickness T1 of the object to be reverse engineered, but the length L2 of the reverse shape is longer than the length L1 of the object to be reverse engineered. Since the length L2 of the reverse shape is formed longer than the length L1 of the object to be reverse engineered, when the welding action is performed on the flange 1, the expanded portion is contracted to achieve a shape desired by the user.

A method of designing a welding margin according to another embodiment of the present invention will be described in detail with reference to FIG. 10. 10 is a flow chart showing in detail a method for designing a welding margin in accordance with another preferred embodiment of the present invention.

Referring to FIG. 10, the file input / output unit 10 receives a reverse design target file and a property information file from a user (S211). The file input / output unit 10 transmits the reverse design target file to the design information extraction unit 25 and the property information file to the property information extraction unit 20. At this time, the reverse engineering target file may be a CAD file containing a design design for the circular shape of the target to be reverse engineered. Here, the reverse design target may be one of the L type and the T type cross-sectional shape. The property information file contains the material and thickness of the element.

The design information extracting unit 25 parses the reverse design target file and extracts geometric information of points and lines necessary for welding margin design (S213). At this time, the geometric information of the point and the line indicates the position and shape of the point and the line.

The shape derivation control unit 45 grasps the position and shape of the point and the line, and generates an outline by connecting the point and the line (S215).

The design information extracting unit 25 parses the reverse design target file and extracts the position of the line existing in the outline (S217). For example, the design information extracting unit 25 may extract the position of the line by searching by the name that is the property information of the element in the reverse design target file. In this case, the reverse design target file may be input and extracted even if a plurality of flanges exist because information about the flanges (eg, the position of the flanges) and the flanges that are matched one-to-one correspond to the line existing in the outline. In addition, the reverse engineering target file may also include cross-sectional information of the flange.

The shape derivation control unit 45 generates an inner line in the outline using the position of the line (S219). The reason for generating an inner line in the outline is that the cross-sectional shape of the L type, unlike the T-type cross-sectional shape may exist a plurality of internal materials.

The shape derivation control unit 45 generates a plane by dividing the inside of the outline using the generated internal line (S221).

The shape derivation control unit 45 generates an element network in the generated surface (S223). In this case, the type of meshes formed includes planar triangles, square elements, and two-dimensional beam elements. Here, planar triangular and rectangular elements are used to model the web part and two-dimensional beam elements are used to model the flange part. In addition, the two-dimensional beam element may calculate a thermal deformation by inputting a temperature, and by using the same, a reverse design shape may be derived by inputting a welding deformation amount and an appropriate temperature value corresponding to the flange portion.

The shape derivation control unit 45 determines at least one inner line as a single line, and extracts a central point of the single line (S225). The reason for judging at least one inner line as a single line is that it is difficult to extract the center point because there are a plurality of inner lines. The shape derivation control unit 45 restrains the extracted center point by six degrees of freedom. The reason for restraining the center point is that the center point is suitable for the point where the load is applied to minimize the movement of the small member.

On the other hand, the physical property information extraction unit 20 parses the physical property information file received from the file input and output unit 10 to extract the material and thickness of the small member (S227).

The input temperature manager 30 recognizes the date when the reverse design target file and the property information file are input to the file input / output unit 10 and extracts the ambient temperature (S229).

The welding deformation controller 40 calculates the linear expansion coefficient by inputting the material of the small member, the thickness of the web, and the ambient temperature in an equation to obtain the linear expansion coefficient (S231). Here, since the coefficient of linear expansion represents the shrinkage of the element, a negative sign can be applied. The welding deformation controller 40 generates a welding deformation amount by applying a negative sign to the linear expansion coefficient. At this time, since the linear expansion coefficient has a negative sign because it represents the shrinkage of the element, when the negative sign is applied to the linear expansion coefficient, the weld deformation amount finally has a positive sign.

The welding deformation controller 40 calculates a temperature value using the thickness of the small member (S233). The welding deformation control unit 40 transmits the welding deformation amount and the temperature value to the shape derivation control unit 45.

The shape derivation control unit 45 inputs a welding deformation amount, a temperature value, and a center point into the element network, and calculates an inverse deformation amount through finite element analysis (S235).

The shape derivation control unit 45 calculates positions and shapes of lines and points to be moved by the welding margin using the calculation result (S237). Thereafter, the shape derivation control unit 45 forms an outline by connecting the calculated lines and points to generate an inverse shape (S239).

Finally, the shape derivation control unit 45 generates an inverse design shape file reflecting the inverse shape (S241). In addition, the inverse shape management unit 55 stores and manages the inverse design shape file generated by the shape derivation control unit 45. The file input / output unit 10 outputs the reverse design shape file generated by the shape derivation control unit 45.

Hereinafter, a method of generating an inverse shape when the shape deriving control unit is one of an L type and a T type will be described with reference to FIGS. 11 to 17.

The shape derivation control unit 45 generates the outline 109 of the object to be reverse-designed using the lines and points extracted by the design information extraction unit 25 as shown in FIG. 11. As shown in FIG. 11, the shape derivation control unit 45 generates the first to third internal lines 113, 116, and 119 in the outline 109 using the positions of the lines extracted by the design information extraction unit 25. . In addition, the shape derivation control unit 45 may include the surfaces 121, 123, 125, and 127 divided using the first to third internal lines 113, 116, and 119 on which the outline 109 is formed, as illustrated in FIG. 12. , 133, 138). The shape derivation control unit 45 generates the element network on the divided surface as shown in FIG. 13.

As illustrated in FIG. 14, the shape derivation control unit 45 determines the first to third internal lines 113, 116, and 119 as the single line 120. The shape derivation control unit 45 extracts the center point 130 from the single line as shown in FIG. 15. As shown in FIG. 16, the shape derivation control unit 45 inputs a welding deformation amount, a temperature value, and a central point into the element network, and when the analysis is performed through finite element analysis, the flange 1 is formed to expand. Finally, the shape derivation control unit 45 generates the inverse shape as shown in FIG.

Here, only the small member having a simple shape has been described as an example, but the present invention is not limited thereto, and the present invention may be applied to all types of materials assembled in an angle shape. In addition, although only one example of the reverse engineering target file and the property information file is described as an example, the present invention is not limited thereto and may be used when a plurality of reverse engineering target files and the property information file are input.

In addition, the welding margin design system 100 may be included in the nesting system so that the welding margin design may be performed while the file is loaded during the nesting operation. This prevents user errors or omissions in advance so that all work can be handled automatically to design welding margins. Here, the nesting operation is a painting operation on the member, and specifically, a drawing and a position for designing the member to be designed. Meanwhile, the welding margin design system 100 may be installed for each individual computer of the user and used only when the user wants the system.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a plan view briefly showing a song built-up.

2 is a photograph showing a general state of the song built-up shown in FIG.

Figure 3 is a block diagram showing a welding margin design system according to an embodiment of the present invention.

4 is a flow chart briefly illustrating a method of designing a welding margin in accordance with one preferred embodiment of the present invention.

Figure 5 is a flow chart showing in detail a method for designing a welding margin in accordance with one preferred embodiment of the present invention.

6 is an exemplary view showing an outline generated by using a reverse engineering target file according to an embodiment of the present invention.

Figure 7 is an exemplary view showing the shape after forming the element net in the outline according to an embodiment of the present invention.

8 is an exemplary view showing a shape after inputting the welding deformation amount and the temperature value in the element network according to an embodiment of the present invention.

9 is an exemplary view showing an inverse shape including a welding margin according to an embodiment of the present invention.

10 is a flow chart showing in detail a method of designing a welding margin in accordance with another preferred embodiment of the present invention.

11 is an exemplary view showing an outline and an inner line generated using the reverse design target file according to another embodiment of the present invention.

12 is an exemplary view showing a plane divided using an inner line according to another preferred embodiment of the present invention.

Figure 13 is an exemplary view showing the shape after forming the mesh in the outline according to another embodiment of the present invention.

14 is an exemplary view showing a single line for extracting a central point according to another preferred embodiment of the present invention.

15 is an exemplary view showing a center point of the inner line according to another preferred embodiment of the present invention.

16 is an exemplary view showing a shape after inputting a welding deformation amount, a temperature value and a center point in the mesh according to another preferred embodiment of the present invention.

17 is an exemplary view showing an inverse shape including a welding margin according to another preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: flange

3: web

5: welding part

10: file input / output unit

20: property information extraction unit

25: design information extraction unit

30: input temperature management unit

40: welding deformation control unit

45: shape derivation control unit

50: display unit

55: inverse shape management unit

100: welding margin design system

Claims (20)

In the method of automatic welding margin design system of the small member to design the welding margin, (a) receiving the reverse engineering target file and the property information file; (b) generating an outline using the reverse design target file, and generating a mesh in the outline; (c) calculating a welding deformation amount of the element using the property information file; (d) inputting the welding deformation amount and the temperature value into the mesh to generate an inverse shape including a welding margin; And (e) generating a reverse design shape file in which the reverse shape is reflected; The reverse engineering target file reflects the shape of the reverse design target, and the physical property information file includes the physical property information of the base member including the material and the thickness of the base member. In step (c), Parsing the property information file to extract material and thickness of the element; Extracting an average temperature corresponding to a date on which the property information file is input from an average temperature previously stored for each date and setting the average temperature as an ambient temperature; Calculating a coefficient of linear expansion of the element using the material and the thickness of the element and the ambient temperature; And Generating the weld deformation amount based on the linear expansion coefficient, The step (d) Extracting a central point by using an inner line in the outline, wherein the inner line is generated using a position of a line existing in the outline extracted by parsing the reverse engineering target file; Calculating an inverse strain amount by inputting the weld strain amount, the temperature value and the center point into the mesh; Calculating positions and shapes of lines and points to be moved by the welding margin using the calculation result; And Generating the inverse shape using the lines and points; Automatic welding margin design method of small members. delete The method of claim 1, Generating an outline using the reverse engineering target file, and generating a mesh in the formed outline, Parsing the reverse engineering target file to extract lines and points constituting a shape; Generating an outline using the lines and points; And Generating a surface within the outline and generating the mesh. delete delete delete The method of claim 1, And the temperature value is calculated using the thickness of the element. The method of claim 1, In step (e), The reverse shape is reflected, and the step of generating the reverse design shape file in the same file format as the reverse design target file, automatic welding margin design method of the small member. The method of claim 3, Creating a face in the outline, and generating a mesh, Parsing the reverse engineering target file and extracting a position of a line existing in the outline; Generating an inner line in the outline using the position of the line; And And generating the surface by dividing the inside of the outline by using the inner line, and generating the element mesh. delete The method of claim 9, Extracting a central point using the inner line, Determining at least one inner line generated in the outline as a single line; Extracting a center point from the single line; And And restraining the central point. In the system for designing the automatic welding margin of small members, A physical property information extraction unit for parsing the received physical property information file and extracting material and thickness of the element; An input temperature manager configured to store an average temperature for each date and extract an average temperature corresponding to a date on which the property information file is input as an ambient temperature; A welding deformation controller for calculating a linear expansion coefficient of the small member using a material and a thickness of the small member and the ambient temperature, and calculating a welding deformation amount of the small member based on the linear expansion coefficient; A design information extracting unit which parses the input reverse engineering target file and extracts lines and points constituting the shape of the target to be reverse engineered; And Generating a mesh using the reverse engineering target file and inputting the weld deformation received from the welding deformation controller to the mesh to generate a reverse engineering shape file; The shape derivation control unit, Generate an outline using the lines and points, generate an inner line within the outline using the position of a line existing in the outline, divide the inside of the outline using the inner line, and generate a mesh The at least one inner line generated in the outline is determined as a single line, the center point extracted from the single line is constrained, and the weld deformation amount, the temperature value, and the center point received from the welding strain control unit in the mesh. Generate the inverse shape by inputting, and generate the inverse shape shape file by reflecting the inverse shape Automatic welding margin design system for small members. The method of claim 12, And a file input / output unit configured to receive the reverse engineering target file and the physical property information file and output the reverse engineering geometry file. delete delete delete The method of claim 12, The design information extraction unit, Parsing the reverse engineering target file to extract the position of the line existing in the outline line automatic welding margin design system of the small member. delete delete As a recording medium that can be read by the automatic welding margin design system, a program of instructions on how to design a welding margin of a small member automatic welding margin design system is implemented. In the method of automatic welding margin design system of the small member to design the welding margin, (a) receiving the reverse engineering target file and the property information file; (b) generating an outline using the reverse design target file, and generating a mesh in the outline; (c) calculating a welding deformation amount of the element using the property information file; (d) inputting the welding deformation amount and the temperature value into the mesh to generate an inverse shape including a welding margin; And (e) generating a reverse design shape file in which the reverse shape is reflected; The reverse engineering target file reflects the shape of the reverse design target, and the physical property information file includes the physical property information of the base member including the material and the thickness of the base member. In step (c), Parsing the property information file to extract material and thickness of the element; Extracting an average temperature corresponding to a date on which the property information file is input from an average temperature previously stored for each date and setting the average temperature as an ambient temperature; Calculating a coefficient of linear expansion of the element using the material and the thickness of the element and the ambient temperature; And Generating the weld deformation amount based on the linear expansion coefficient, The step (d) Extracting a central point by using an inner line in the outline, wherein the inner line is generated using a position of a line existing in the outline extracted by parsing the reverse engineering target file; Calculating an inverse strain amount by inputting the weld strain amount, the temperature value and the center point into the mesh; Calculating positions and shapes of lines and points to be moved by the welding margin using the calculation result; And Generating the inverse shape using the lines and points; A recording medium having stored thereon a program for implementing an automatic welding margin design method for small members.

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