JP2002099582A - System to generate junction information on assembled structure and system to generate shape model for assembled structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a system for generating a junction information on an assembled structure that can easily set, the junction information required for predicting the figure of the structure when it is assembled in a simulated experiment by using a computer. SOLUTION: An outer peripheral line model showing the outer peripheral line of a figure for one of parts that constitutes the assembled structure is inputted, first. A pair of junction portions on the outer peripheral lines constituting the outer peripheral line model is designated. The same number of junction panel joints at each paired junction portion is generated and also automatically a junction relation for the junction panel joints that correspond to each other is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simulation experiment using a computer for assembling three-dimensional members such as three-dimensional panels used in buildings and the like, flat panels such as flat panels, clothes parts, paper patterns and the like, and bars such as trusses. And a method and apparatus for creating joining information for assembling those parts when prediction is made.

[0002]

2. Description of the Related Art Conventionally, when assembling a flat member such as a panel member or a wire member such as a truss used in a building or the like into a three-dimensional shape, it is necessary to predict an assembled state from each member dispersed in a space. It is extremely difficult to increase the number of parts and the number of joints.
The assembly state has been confirmed by creating and displaying a three-dimensional model by manual input using AD. For example, in the case of pattern making in the field of apparel, it has been extremely difficult to confirm the relationship between pattern and design. In other words, by manually creating the pattern, assembling the clothes parts created based on the pattern into a three-dimensional object on the base, checking and correcting the pattern based on this repeatedly, after trial and error, the three-dimensional Create a shape, design a pattern based on this,
Has been created.

In recent years, CAD-based design techniques have been developed, and it has become common to design products and buildings using computers. In the above-mentioned apparel field, apparel CAD has made it possible to design patterns.
Until now, it was still difficult to predict the three-dimensional assembled shape after sewing from a flat paper pattern (paper having a shape corresponding to clothes parts) with a computer.

To solve this problem, a method of predicting a three-dimensional shape using a computer has recently been proposed. For example, Japanese Patent Application Laid-Open No. H10-124538 discloses a simulation experiment method using a computer when assembling a three-dimensional member, a flat or rod-shaped member arranged in a space. In this method, a part constituting an assembly structure is modeled as a part model including a refraction line, and joint information defining a joint part of the part to be assembled and virtual mechanical characteristics of the part are set. Then, the shape of the part model after assembly is predicted based on the virtual mechanical characteristics. If this method is used, it is possible to predict the three-dimensional shape after the cloth is sewn from the flat pattern paper by the computer.

[0005] In the method for predicting an assembly shape using a computer as described above, joining information for defining a joining portion is defined as a combination of nodes constituting a part model.
The joining information is manually set one by one while looking at the screen. However, when the number of the joining information increases, it takes much time and trouble. In addition, there is also a problem that if the number of pieces of joining information increases due to manual work, data setting errors increase. Therefore, as a result, there is a problem that it is difficult to predict the shape of the assembly structure.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to predict the shape of an assembled structure at the time of assembling by a simulation experiment using a computer. It is an object of the present invention to provide an apparatus, a method, and a medium for creating joint information of an assembly structure that can easily set necessary joint information.

It is another object of the present invention to provide an apparatus, a method, and a medium for creating a shape model of an assembled structure for easily predicting an assembled shape of the assembled structure.

[0008]

According to the present invention, there is provided an apparatus for creating joint information of an assembled structure, comprising the steps of:
A line segment part model inputting means for inputting a line segment part model represented as a set of many line segments in which the outer peripheral lines of the shapes of the parts constituting the assembly structure are connected to each other at the nodes, At least one component has a joint relation designating unit designated as a joint combination composed of a pair of joint nodes on the outer peripheral line, and of the plurality of joint combinations designated by the joint relationship designating unit, both of the joint nodes are the same. When there are two joining combinations that are adjacent to each other on the partial outer peripheral line and have the same number of nodes existing between the joining nodes adjacent to each other on the partial outer peripheral line, Having joint information between nodes that automatically generates a joint relationship between the nodes corresponding to each other that exists between the adjacent joint nodes. Wherein, joining information generating device of the assembly structure is provided.

According to another aspect of the present invention, an outer peripheral line model inputting means for inputting an outer peripheral line model representing an outer peripheral line of a shape of at least one component constituting the assembly structure, and Outer-peripheral-joining-part designating means for designating a pair of joining parts on the outer peripheral line to be constituted; node generating means for generating the same number of joining nodes in the pair of joining parts, respectively; An apparatus for creating joint information of an assembly structure is provided, which has a joint information generating means for automatically generating a joint relationship between nodes.

According to another aspect of the present invention, an assembly shape calculation for predicting and calculating a shape model at the time of assembling an assembly structure based on the joining information created by the assembly information creating device for an assembly structure. Characterized by having means
An apparatus for creating a shape model of an assembled structure is provided.

According to a preferred aspect of the present invention, an assembling shape deformation calculation for calculating an assembling deformation shape of the assembling structure based on the shape model created by the assembling structure shape model creating apparatus. There is provided an apparatus for creating a shape model of an assembled structure, characterized by having means.

According to another aspect of the present invention, there is provided a line segment part model represented as an aggregate of a large number of line segments in which the outer peripheral lines of the parts constituting the assembly structure are connected to each other at nodes. Enter and enter at least 1
Designated as a joint combination consisting of a pair of joint nodes on the outer peripheral line of the individual parts, and out of the plurality of designated joint combinations, both of the joint nodes are two adjacent joint combinations on the same partial outer peripheral line. When there are two joint combinations having the same number of joint nodes between adjacent joint nodes on each of the partial outer peripheral lines, when two joint combinations exist between the adjacent joint nodes on the partial outer peripheral lines, A joint information creating method for an assembled structure is provided, wherein a joint relationship between the corresponding nodes is automatically generated.

According to another aspect of the present invention, an outer peripheral line model representing the outer peripheral line of the shape of at least one component constituting the assembly structure is input, and the outer peripheral line model is formed on the outer peripheral line constituting the outer peripheral line model. An outer peripheral line joining portion designating means for designating a pair of joining portions, and generating the same number of joining nodes for each of the pair of joining portions, and automatically generating a joining relationship between the joining nodes corresponding to each other of the pair of joining portions. And a method for creating joint information of an assembled structure.

According to another aspect of the present invention, a shape model at the time of assembling an assembly structure is predicted and calculated based on the joining information created by the above-described joining information creating method. A method for creating a shape model of a structure is provided.

Further, according to a preferred aspect of the present invention, the deformed shape of the assembled structure after assembly is calculated based on the shape model created by the method for creating a shape model of the assembled structure. A method for creating a shape model of an assembled structure.

According to another aspect of the present invention, there is provided a storage medium storing software for operating a computer so that each procedure of the above-described method of creating joint information of an assembly structure can be performed by the computer. Provided.

According to another aspect of the present invention, there is provided a storage medium storing software for operating a computer so that the steps of a method for creating a shape model of an assembled structure can be performed by the computer. You.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, two embodiments of the present invention will be described with respect to an example in which clothes are used as an assembly structure in the present invention.

FIG. 1 is a block diagram illustrating the configuration of an apparatus according to an embodiment of the present invention. (101) is a computer, (102) is a keyboard, (103) is a mouse,
(104) is a display, and (105) is a hard disk device. In (103), a pointing device such as a touch pen or a touch panel can be used in addition to the mouse.

The hard disk device (105) stores pattern CAD data as shown in FIG. 2 as mesh part data, and mesh data created based on the pattern CAD data as shown in FIG. The mesh data is, as shown in FIG. 3, shape data composed of a large number of nodes and a large number of elements composed of the nodes. In this embodiment, two-dimensional triangular elements are used as the elements. . When considering the shape in the thickness direction, it is better to use a three-dimensional element. When mesh data is stored, the mesh data is composed of node numbers constituting the mesh and the position coordinates of the nodes.

As the pattern CAD data and mesh data, a large number of data created in advance may be stored, may be created whenever necessary, or may be stored in a floppy (registered trademark) disk or the like. When necessary, data may be input by a tangible storage medium such as an optical disk or a transmission means such as the Internet or a LAN. [Embodiment 1] An apparatus and method for creating joint information of an assembled structure according to a first embodiment of the present invention and an apparatus and method for creating a shape model of an assembled structure according to the present invention will be described below.

In this embodiment, as shown in FIG.
The computer (101) has a part model input means (1
401), a joint relation designating unit (1402), an inter-node joint information generating unit (1403), a mesh data generating unit (1404), an assembly shape calculation unit (1405), and an assembly shape deformation calculation unit (1406). These functions provided by the computer are specifically provided by a central processing unit and a general-purpose volatile memory.

The part model input means (1401) has a function of inputting a line segment part model of the assembled structure to a computer memory so that the computer (101) can process the line part model. As shown in FIG. 5, the line segment part model is a set of short line segments in which an outer peripheral line representing the part shape of the assembly structure is formed. Although a line segment part model may be created in advance and input to the computer by the part input means (1401), in the present embodiment, the part input means (1401) is constructed as shown in FIG. An outer peripheral line model of a component of a structural body (in this embodiment, the pattern CAD
Data), and a step of creating a component line segment model based on the input outer peripheral line model. In addition, pattern CAD
In the data, for the symmetrical parts, only the shape of one of the parts may be input, so the function of copying the shape of the necessary part or deleting the unnecessary part is also included.

The connection relation designating means (1402) inputs the connection relation of the component line segment model using the mouse (103), that is, information on which part of which part is connected to which part of which part. Has functions. The joining relation is, for example, the node information of the line segment part shape model given as shown in FIG. 15 (the joint of the line segments constituting the line segment part model is called a node, and the coordinate value of the node is called the node information). Is defined as a set of node numbers as shown in FIG.
Here, of the nodes, a node whose joint relationship is defined is called a joint node, and a pair of joint nodes forming the joint relationship is called a joint combination.

The node-to-node junction information generation means (1403)
As shown in FIG. 17, two adjacent joining combinations (E
The following processing is performed on the closed loop C including (1, E2). The closed loop C has the joint combinations E1 and E2 with the joint nodes (N1 of E1, N3 of E2) and (N1 of E1) at each end.
2, N2 of E2) is the same partial outer peripheral line (refers to a part or all of the outer peripheral line. Two partial outer peripheral lines may be different parts of one outer peripheral line of the same part). Are present on L1 and L2 and are at the junction nodes N1 and N
There is no other set joint node between 3 and N2 and N4 (ie, the two joint combinations have both joint nodes adjacent to each other on the same outer circumference). In such a case, three nodes (N5, N6, and N7 are located between N1 and N3) between the joining nodes (N1 and N3 and N2 and N4) adjacent on the respective outer peripheral lines L1 and L2. However, if the numbers of N8, N9 and N10 exist between N2 and N4, the corresponding nodes (N5 and N8, N6 and N9, N7 and N7)
10) Automatically generate joint information.

The mesh data generating means (1404)
It has a function of generating mesh data, which is a set of minute planar polygons, from a line segment model. In this embodiment, a set of triangular elements as shown in FIG. 3 is used as mesh data. As a method of mesh data,
For example, DFWatoson, "Computing n-dimensional Delaun
ay Tesselation with Application to Voronoi Polytop
es ", The Computer Journal, Vol.24, No.2, pp.167-17
2 (1981) can be used.

The assembly shape calculation means (1405) has a function of predicting and calculating the shape of the assembly structure after assembly based on the joining information and the mesh data. In the present embodiment, a method described in Japanese Patent Application Laid-Open No. H10-124538 was used as a method for calculating the assembly shape. In this method, by setting mesh data, joining information, and physical property data of a part as input conditions, virtual mechanical characteristics are set to a joining portion and a refraction line (a line segment constituting the mesh) in the mesh data. The approximate shape of the assembled structure at the time of assembly is predicted and calculated based on the shape of the part and the virtual mechanical characteristics.

The assembling shape deformation calculating means (1406) calculates the assembling shape of the shape of the assembling structure calculated by the assembling shape calculating means (1405) more precisely based on gravity and physical property data of parts. And has a function of generating a more realistic shape of the assembled structure. Thus, it is possible to predict the shape of the assembled structure in a state where gravity is applied, similarly to the real environment. The shape of the assembled structure at the time of assembling is a very large deformation as compared with the shape before assembling, and the calculation may be unstable. As a device to avoid this problem, for example, set the physical properties of the parts to be harder, increase the size of the mesh, calculate the approximate assembly shape, and set the physical properties of the parts to the actual physical properties as the next step, By reducing the size of the mesh,
There is a method for obtaining a precise shape stably (Japanese Patent Laid-Open No. 10-1
34095). The assembling shape deformation calculating means (1406) of this embodiment calculates a rough assembling shape by the assembling shape calculating means (1405) and can stably obtain a precise assembling shape based on the shape. There is also an effect.

Next, a description will be given, with reference to the flowchart of FIG. 4, of a method for creating joint information of an assembly structure according to the first embodiment of the present invention.

In step 401, the hard disk device (10) is input by the part model input means (1401).
From step 5), the pattern CAD data (FIG. 2) as clothing part data is read. In general, the pattern CAD data includes, in addition to the outer peripheral line of the pattern, information of a seam allowance, a line indicating a texture direction, and a reference line such as a bust line or a center line.

In step 402, the outer periphery of the pattern data in the pattern CAD data is extracted by the part model input means (1401). In the present embodiment, lines other than the outer peripheral line in the pattern CAD data, for example, lines representing the texture direction, reference lines, lines representing the seam allowance, etc. are deleted, and only the outer peripheral line is left. Although extracted, the outer line may be extracted by designating only the outer line with the mouse (103). In the present invention, a line defining an assembly shape such as a dart wire is
Even a line inside the pattern is called an outer peripheral line.

In step 403, the outer peripheral line extracted in step 402 is divided by the component model input means (1401) into a set of short line segments as shown in FIG. In the present embodiment example, the length of the line segment to be divided is divided so as to be as close as possible to the length designated by the user, that is, divided so as to be as evenly spaced as possible. May be changed. However, the portions (joining portions) of the outer peripheral line that are joined to each other are divided into the same number of divisions.

In step 404, the joining relationship is designated by the joining relationship designation means (1402). The designation of the joining relationship is performed by designating the nodes of the line segments divided in the joining step 403 by using the mouse (103). This node is called a joint node, and this combination is called a joint combination. For example, in FIG. 6, when joining the nodes N1 and N2, the joining relationship is specified by clicking the node N1 with the mouse and then clicking the node N2 with the mouse. When the joining relationship is specified, a joining combination including a set of nodes is created as (N1, N2). When n nodes are joined at one location, a joining combination such as (N1, N2,..., Nn) is created.

In step 405, the joint information generation means (1403) between two nodes on which two nodes constituting the joint information created in step 404 are present in addition to the joint information created in step 404 exists. It is determined whether or not there is joining information. That is, it is determined whether or not there are two joints adjacent to each other on the same partial outer peripheral line at both joint nodes among a plurality of joint combinations specified by the joint relation specifying means (1402). In other words, a closed loop can be formed by the joining relationship created in step 404, the outer peripheral line joined by the joining information, and yet another joining relationship, and a shape such that there is no joining relationship between the closed loops. It is determined whether or not. For example, as shown in FIG. 6, in addition to the joining relationship C1 created in step 404,
This corresponds to the case where there is a joining relationship C2. As a result of the determination, when such a bonding relationship exists, the process proceeds to step 406, and when such a bonding relationship does not exist, the process proceeds to step 407.

At step 406, the node-to-node junction information generating means (1403) also performs step 405.
It is determined whether or not the number of nodes existing between the joint nodes on each outer peripheral line is equal for each of the joint nodes constituting the two joint combinations determined in the above. Automatically create a joint relationship between nodes to be connected. In other words, step (1)
For the two joint combinations in which both of the joint nodes are respectively located on the same outer line determined in 403), the number of nodes existing between the adjacent joint nodes on each of the partial outer lines is equal to 2 When there are two joining combinations, a joining relationship between corresponding nodes existing between the adjacent joining nodes on each of the partial outer peripheral lines is automatically generated. For example, in FIG. 6, the number of nodes existing between the nodes N1 and N3 (5 in this example) and the number of nodes existing between the nodes N2 and N4 (5 in this example)
Check the number of and if the numbers are equal, as in this example,
A joining relationship is automatically created as shown in FIG. In this way, by simply specifying the joining relationship at both ends of the part to be joined, the joining relationship between them is automatically created, so the labor of creating joining information is greatly reduced, and mistakes in creating joining information are also reduced. You.

In step 407, it is determined by the user's instruction whether or not further joint information is created by the joint information generating means (1403). When creating the joining information, the process returns to step 404, and when creating the joining information, the process proceeds to step 408.

At step 408, mesh data as shown in FIG. 8 is created by the mesh data generating means (1404) based on the pattern data divided at step 402 into sets of line segments.

In step 409, the assembling shape calculating means (1405) uses the mesh data created in step 408 and the joining information created in steps 404 to 407 to create an assembly structure as shown in FIG. Calculate the shape at the time of assembly. By displaying the calculation result on the display (104), the shape of the assembled structure at the time of assembly can be predicted and confirmed without assembling the actual product.

In step 410, the assembling shape deformation calculating means (1406) calculates a more precise shape at the time of assembling the assembled structure formed in step 409 based on gravity and physical property data of parts. FIG. 18 shows an example of a shape generated by the assembly shape deformation calculating means (1406). By calculating the assembled shape in two steps in steps 409 and 410 in this manner, a stable and realistic assembled shape can be calculated. Then, by displaying the result on the display (104), the assembled shape can be confirmed.

In this embodiment, the mesh is divided after the joining information is created. However, the present invention is not limited to this.
After the mesh division in step 408, step 4
From 04, the joining information may be created in step 407.
In the present embodiment, the step of creating mesh data is also included in the procedure of the joining information creating method. However, the creation of mesh data is not included, and another mesh creating device may be used.
Further, the nodes of the mesh and the nodes of the line segments of the outer peripheral line may be created completely separately, but it is preferable that they are common (or partially overlapped) because calculation and data manipulation become easier.

It is preferable that the automatic creation function of joint information in step 406 be able to stop the automatic creation function of joint information so that the joint information can be created manually. Further, it is preferable that the joining information can delete unnecessary joining information later. [Embodiment 2] Next, an apparatus and method for creating joint information of an assembled structure in a second embodiment of the present invention and an apparatus and method for creating a shape model of an assembled structure of the present invention will be described.

In this embodiment, as shown in FIG.
The computer (101) includes an outer peripheral line model input unit (1901), an outer peripheral line joint site specifying unit (1902),
Node generating means (1903), joining information generating means (190)
4), mesh data generation means (1905), assembly shape calculation means (1906), assembly shape deformation calculation means (190)
7) is included. These various functions provided by the computer are specifically provided by a central processing unit and a general-purpose volatile memory.

The outer peripheral line model input means (1901) has a function of inputting an outer peripheral line model representing the outer peripheral line of the part shape of the assembly structure to a computer memory so that the computer (101) can process the outer peripheral line model. In the present embodiment, the clothing pattern CAD data is used as the input data. However, the clothing pattern CAD data includes data other than the outer line data, such as a seam allowance, a line indicating the texture direction, a bust line, and a center line. Since information about the reference line is generally included, a function for extracting only the outer line data is also included.

The outer circumference joining portion designation means (1902)
It has a function of designating a joint on the outer peripheral line using the mouse (103). The joint is performed by designating the start point and the end point of the joint. A method of designating the outer peripheral line joining portion will be described later in detail.

The node generating means (1903) has a function of generating the same number of nodes at the corresponding joint sites. The node generation method will be described later in detail.

The joint information generating means (1904) has a function of generating joint information for nodes that are joined to each other among the joint portions. Regarding the joining information generating means,
This will be described in detail later.

The mesh data generation means (1905)
This is the same as the mesh data generating means (1404).

The assembly shape calculation means (1906) is the same as the assembly shape calculation means (1405).

The assembly shape deformation calculation means (1907) is the same as the assembly shape deformation calculation means (1406).

Next, a description will be given, with reference to the flowchart of FIG. 10, of a method for creating joint information of an assembled structure according to the second embodiment of the present invention.

In step 1001, the pattern CAD data (FIG. 3) as clothing part data is read from the hard disk device (105) by the outer circumference model input means (1901). In the pattern CAD data, in addition to the outer peripheral line of the pattern, a line representing the seam allowance and the texture direction,
In general, information on a reference line such as a bust line or a center line is also included.

In step 1002, the outer line in the pattern data in the pattern CAD data is extracted by the outer line model input means (1901). In the present embodiment, lines other than the outer peripheral line in the pattern CAD data, for example, lines representing the texture direction, reference lines, lines representing the seam allowance, etc. are deleted, and only the outer peripheral line is left. Although extracted, the outer line may be extracted by designating only the outer line with the mouse (103).

In step 1003, the outer line joining portion designating means (1902) designates the portions of the outer line extracted in step 1002 that are to be joined when the assembled structure is assembled. In this embodiment example, by specifying the start point and the end point of the part to be joined,
The joint site was specified. For example, in FIG. 11, when joining a part of the outer line L1 and L2, first, a mouse (10
In 3), the start point P1 of L1 is specified, and then the end point of L1 is specified. Then, the starting point P3 of L2 which is the mating partner side
Is specified, and then the end point P4 of L2 is specified. In this way, the site to be joined is specified. In addition, when the outer peripheral line is a closed curve and it is not possible to define a joint part by simply designating two points, for example, a point between the two points is designated by a mouse (10
By specifying in step 3), it is sufficient that the joint site can be defined.

In step 1004, the node generating means (1903) converts the outer peripheral line into a set of short line segments (nodes at both ends, which are connected by a straight line) as shown in FIG. To divide. At this time, the joint portions specified in step 1003 are divided so as to have the same division number. In the present embodiment, a set of line segments is created by dividing the outer line, but a set of line segments may be newly created while leaving the outer line as it is.

In step 1005, a joint combination is created by the joint information generating means (1904). The joining combination is created by the following procedure. First, step 10
Find the junction specified in 03. Next, a set of nodes formed by dividing the part in step 1004 is found. Then, a joint combination is automatically created between the nodes corresponding to the joint portions.
Since the nodes are created in step 1004 so that the number of nodes at the respective portions to be joined is equal, the joining relationship can be automatically created. FIG. 13 shows a case where the joining relation is automatically created. The creation of the joining relationship is performed for all the joining sites specified in step 1003.

At step 1006, mesh data is created by the mesh data generating means (1905) based on the pattern data divided at step 1004. Creation of mesh data is performed in the same manner as in step 408. Note that in the present embodiment example, step 1
Although the mesh data is created after the creation of the joining information in 005, the joining information may be created after the mesh data is created. In the present embodiment, the step of creating mesh data is also included in the procedure of the joining information creating method. However, the creation of mesh data is not included, and another mesh creating device may be used.

In step 1007, the assembling shape of the assembled structure is calculated by the assembling shape calculating means (1906). The calculation method is the same as that in step 409.

In step 1008, a precise assembly shape of the assembly structure is calculated by the assembly shape deformation calculating means (1907). The calculation method is the same as in step 410 described above.

As described above, since a large amount of joining information can be automatically created without manually designating joining information one by one, labor for creating joining information is reduced, and mistakes caused by manual input are eliminated. Can be reduced. Further, since the shape at the time of assembling the assembled structure can be predicted without actually assembling the assembled structure, trial and error such as correction of the shape and change of the material can be easily performed.

As described above, the apparatus and method for creating joint information of an assembled structure according to the present invention have been described with respect to an example in which clothes are used as the assembled structure. Architectural structures such as membrane structures, truss structures, beddings such as futons, pillows, shoes,
A structure composed of a single component having a refractible structure, such as an accessory such as a bag or a hat, or a plurality of components (of course, some or all of the components may be refractible). An assembled structure is conceivable.

As described above, the method of creating the joint information of the assembled structure and the method of creating the shape model of the embodiment are as follows.
Each of them is realized by a computer and a program for operating the computer. The programs and various data as described above are distributed by a tangible storage medium such as a floppy disk, a CD-ROM, or a transmission means such as a wired or wireless network.

[0062]

As described above, according to the present invention, the joint information of the assembly structure which can easily set the joint information necessary for predicting the shape of the assembly structure at the time of assembling by the simulation experiment by the computer is provided. A creation device and method can be provided.

Further, by using the joint information created by the joint information creating apparatus as described above, an apparatus and method for creating a shape model of an assembly structure for easily predicting the shape at the time of assembly of the assembly structure, and A medium can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is an example of pattern CAD data according to an embodiment of the present invention.

FIG. 3 is an example of mesh data according to an embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of the first exemplary embodiment of the present invention.

FIG. 5 is an example of a line segment part model according to an embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the part model input means according to the embodiment of the present invention;

FIG. 7 is a diagram for explaining the operation of the joint information generating means between nodes according to an embodiment of the present invention;

FIG. 8 is an example of mesh data according to an embodiment of the present invention.

FIG. 9 is an example of a shape of an assembly structure generated by an assembly shape calculation unit according to an embodiment of the present invention;

FIG. 10 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 11 is a diagram for explaining the operation of the outer peripheral line joining portion designating means of one embodiment of the present invention.

FIG. 12 is a diagram for explaining the operation of a node generation unit according to an embodiment of the present invention;

FIG. 13 is a diagram for explaining the operation of the joint information generating means according to one embodiment of the present invention.

FIG. 14 is a diagram illustrating various functions provided by a computer according to the first embodiment of the present invention.

FIG. 15 is an example of node information according to an embodiment of the present invention.

FIG. 16 is an example of a joining relationship in an embodiment of the present invention.

FIG. 17 is a diagram for explaining the operation of the joint information generating means between nodes according to an embodiment of the present invention;

FIG. 18 is an example of a shape of an assembly structure generated by an assembly shape deformation calculating unit according to an embodiment of the present invention.

FIG. 19 is a diagram illustrating various functions provided by a computer according to the second embodiment of the present invention.

[Explanation of symbols]

 (101) Computer (102) Keyboard (103) Mouse (104) Display (105) Hard Disk Drive (1401) Component Model Input Unit (1402) Joining Relationship Designating Unit (1403) Node Joint Information Generation Unit (1404) Mesh Data Generation Means (1405) Assembly shape calculation means (1406) Assembly shape deformation calculation means (1901) Peripheral line model input means (1902) Peripheral line joint site designation means (1903) Node generation means (1904) Joint information generation means (1905) Mesh Data generation means (1906) Assembly shape calculation means (1907) Assembly shape deformation calculation means

Claims (10)

[Claims] A line part model input means for inputting a line part model in which an outer peripheral line of a shape of a part constituting an assembly structure is represented as a set of a number of line segments connected to each other at nodes. A joining relation designating unit that designates a joining relation of parts as a joining combination composed of a pair of joining nodes on an outer peripheral line of at least one part; and a plurality of joining combinations designated by the joining relation designating unit.
There are two joint combinations in which both of the joint nodes are adjacent to each other on the same partial outer peripheral line, and the number of joint nodes existing between the adjacent joint nodes on each of the partial outer peripheral lines is equal. And a joint information generating means for automatically generating a joint relationship between the nodes corresponding to each other which is present between the adjacent joint nodes on the partial outer peripheral line. Joining information creation device. 2. An outer circumference model input means for inputting an outer circumference model representing an outer circumference of a shape of at least one part constituting an assembly structure, and a pair of joining parts on the outer circumference forming the outer circumference model , A node generating means for generating the same number of joint nodes respectively at the pair of joints, and automatically generating a joint relationship between the corresponding joint nodes of the pair of joints. An apparatus for creating joint information of an assembled structure, comprising joining information generating means. 3. An assembly shape calculation means for predicting and calculating a shape model at the time of assembly of an assembly structure based on the connection information created by the assembly information creation device for assembly structure according to claim 1 or 2. An apparatus for creating a shape model of an assembled structure. 4. An assembly shape deformation calculating means for calculating a deformation state of an assembly structure after assembly based on the shape model created by the assembly model shape model creation device according to claim 3. An apparatus for creating a shape model of an assembled structure. 5. A line part model represented as a set of a number of line segments in which the outer peripheral lines of the shapes of the parts constituting the assembly structure are connected to each other at nodes, and at least one connection relation between the parts is determined. Designated as a joint combination consisting of a pair of joint nodes on the outer peripheral line of the individual parts, and out of the plurality of designated joint combinations, both of the joint nodes are two adjacent joint combinations on the same partial outer peripheral line. When there are two joint combinations having the same number of joint nodes between adjacent joint nodes on each of the partial outer peripheral lines, when two joint combinations exist between the adjacent joint nodes on the partial outer peripheral lines, A joint information creating method for an assembled structure, wherein a joint relationship between the corresponding nodes is automatically generated. 6. An outer peripheral line joint for inputting an outer peripheral line model representing an outer peripheral line of a shape of at least one part constituting an assembly structure, and designating a pair of joint portions on the outer peripheral line constituting said outer peripheral line model. An assembly structure, wherein the same number of joint nodes are generated in each of the pair of joint sites, and a joint relationship between the joint nodes corresponding to each other in the pair of joint sites is automatically generated. How to create joint information. 7. A predictive calculation of a shape model at the time of assembling an assembled structure based on the joining information created by the joining information creating method according to claim 5 or 6.
A method for creating a shape model of an assembled structure. 8. An assembled structure according to claim 7, wherein a state of deformation of the assembled structure after assembly is calculated based on the shape model created by the method for creating a shape model of the assembled structure. How to create a shape model. 9. A storage medium storing software for operating a computer so that each step of the method for creating joint information of an assembly structure according to claim 5 or 6 can be performed using the computer. 10. A storage medium storing software for operating a computer so that each step of the method for creating a shape model of an assembled structure according to claim 7 or 8 can be performed using the computer.