JP2005182203A - Component layout evaluation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To consider the deformation of a component generated by installation, in a system performing component layout evaluation about a plurality of components arranged on a calculation space. <P>SOLUTION: Each the component is performed with a layout on the calculation space (step S10), deformation shape data are acquired about the component generated with the deformation by the installation, and the data are registered as a target of the component layout evaluation of the step S12 (step S11). Calculation of a distance between the plurality of components and/or interference between the plurality of components is executed by use of the data on the component deformed by the installation (step S12). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a CAD system, and more particularly, to a component layout evaluation system that performs determination of presence / absence of interference between components and / or calculation of a distance between components for a plurality of components arranged in a calculation space.

  The CAD system can arrange each component in a desired posture at a desired position on the calculation space coordinates based on the input instruction. Furthermore, the CAD system can output information that visually indicates in what position each component is placed in the calculation space coordinates and in what posture. Therefore, the designer can determine the layout (position and orientation) of each component so that the components do not interfere with each other while checking the output information.

  However, when parts with complicated shapes are included, or when many parts are crowded, artificial judgment based on the output information may take time and accuracy may be reduced. is there. Therefore, by geometric calculation, component layout evaluation, that is, inspection of whether or not the three-dimensional regions occupied by each component overlap (so-called inter-component interference inspection), distance between components (shortest distance, A system that calculates a distance in a predetermined region, a separation distance along a predetermined direction, and the like has been put into practical use (see, for example, Patent Document 1).

JP 9-27046 A

  Now, there are cases where parts to be laid out include pipes and elastic tubes (rubber tubes, resin tubes, etc.) attached to the pipes. When the elastic tube is attached to the pipe, the outer shape of the elastic tube expands according to the outer shape of the pipe to which the elastic tube is attached.

  However, in the conventional automatic component layout evaluation described above, such a deformation, that is, a deformation generated in a part by assembling a plurality of parts has not been taken into consideration at all. For this reason, at the stage of component layout evaluation, despite the fact that the problem did not become apparent, when these components were actually assembled, interference occurred and the desired distance between the components was not secured. Could occur.

  A component layout evaluation system according to the present invention is a component layout evaluation system that performs determination of the presence or absence of inter-component interference and / or calculation of a distance between components for a plurality of components arranged in a calculation space. A post-deformation shape acquisition unit that acquires a post-deformation shape of a part that is deformed by assembly is provided, and the determination of the presence or absence of inter-component interference and / or the calculation of the inter-part distance is performed using the acquired post-deformation shape. Is preferable.

  The component layout evaluation system according to the present invention further includes a component shape storage unit that stores a pre-deformed shape for each component, and the post-deformation shape acquisition unit includes a post-deformation shape corresponding to the component. Is preferably acquired from the component shape storage unit.

  Further, in the component layout evaluation system according to the present invention, the component shape storage unit further stores a post-deformation shape acquired in advance for each of other components involved in the deformation or specifications of the component, It is preferable that the post-deformation shape acquisition unit acquires the post-deformation shape corresponding to the part and other parts involved in the deformation of the part or the specifications of the part from the part shape storage unit.

  In the component layout evaluation system according to the present invention, it is preferable that the post-deformation shape acquisition unit acquires the post-deformation shape of the elastic tube whose outer diameter is enlarged by mounting on another component.

  Further, the component layout evaluation method according to the present invention is a component layout evaluation method for determining the presence / absence of inter-component interference and / or calculating the distance between components for a plurality of components arranged in a calculation space. A step of acquiring a post-deformation shape of a component that is deformed by assembling the component is included, and the determination of the presence or absence of inter-component interference and / or the calculation of the inter-component distance is performed using the acquired post-deformation shape.

  In addition, the program according to the present invention causes a computer to function as a component layout evaluation system that determines the presence or absence of inter-component interference and / or calculates the distance between components for a plurality of components arranged in a calculation space. The computer functions as a post-deformation shape acquisition unit that acquires a post-deformation shape of a part that is deformed by assembling a plurality of parts, and determines whether or not there is inter-component interference and / or determines the inter-component distance. The calculation is executed using the acquired post-deformation shape.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of a component layout evaluation system 10 according to the present embodiment. As shown in FIG. 1, the component layout evaluation system 10 is configured as a computer, for example, and controls the operation of the control unit 12 (CPU or the like) 12 that performs component layout evaluation or controls input / output, and the control unit 12. A storage unit (memory, hard disk, etc.) 14 for storing related information, an input unit (keyboard, mouse, etc.) 16 for inputting various information, and information for prompting input of calculation results and various information are output in a predetermined format. An output unit (display or the like) 18 is included. In addition, the component layout evaluation system 10 incorporates or is connected to a removable device, a communication interface device or the like (none of which is shown), and through these, other devices (for example, other computers that function as a CAD system). It is also possible to capture predetermined data or the like (for example, three-dimensional shape data of each part). The captured data is stored in the storage unit 14.

  In the present embodiment, the control unit 12 serves as a component layout evaluation execution unit that performs the determination of the presence or absence of inter-component interference and / or the calculation of the inter-component distance, and the deformed shape of the component that is deformed by assembling a plurality of components. It functions as a post-deformation shape acquisition unit for acquiring. These processes are executed by the control unit 12 according to a program held in a program holding unit (for example, the storage unit 14). For example, the program is stored in a computer-readable storage medium (eg, MO, DVD, etc .; not shown), read by a removable device (eg, MO drive, DVD drive, etc .; not shown), and stored in the program holding unit. Installed. Of course, it is possible to install a program downloaded from an external device storing the program via a communication network, a communication interface device, or the like.

  FIG. 2 is a flowchart showing an example of a series of processes executed by the component layout evaluation system 10 according to the present embodiment. In the example of FIG. 2, in the component layout evaluation system 10, roughly divided layout determination S <b> 10, post-deform shape acquisition S <b> 11, and component layout evaluation S <b> 12 are executed. These steps S10 to S12 are basically executed by the control unit 12.

  <Temporary layout determination: S10> In the storage unit 14, information indicating the three-dimensional shape of each component is registered in advance. From the information indicating the three-dimensional shape and the information indicating the position and orientation of each component input by the operator operating the input unit 16 or the like, the control unit 12 determines each component of the position and orientation on the calculation space coordinates. The occupied three-dimensional area can be calculated. Furthermore, the control unit 12 can generate information for outputting the position and orientation of each part on the calculation space coordinates or the three-dimensional region from the output unit 18. Accordingly, the operator operates the input unit 16 while confirming information output from the output unit 18 (for example, a component layout diagram [perspective view, cross-sectional view, etc.] or a numerical value [distance between components, etc.]). The position and orientation of each part can be determined. However, since the component layout evaluation (step S12) has not been performed at this time, the determination is a provisional determination for performing the component layout evaluation. Then, the control unit 12 registers in the storage unit 14 information indicating the determined (temporarily determined) part position and orientation or information indicating a three-dimensional region. At this time, the information indicating the position and orientation of the component can be, for example, the position coordinate on the calculation space coordinate of the representative point of the component (for example, two points determined in advance for each component).

  <Post-deformation shape acquisition: S11> First, the control unit 12 acquires a part for which a post-deformation shape is acquired (that is, a part that is deformed by assembly), a part involved in the deformation, and / or a specification thereof. FIG. 3 is an explanatory diagram for showing the post-deformation shape acquisition when the elastic tube 22 is attached to the pipe 20. Of these, (a) is a temporary layout determination (step) before the post-deformation shape is acquired. It is a side view (partial cross section figure) which shows arrangement | positioning of each components 20 and 22 in the state by which S10) was performed. In this example, the part for which the shape after deformation is obtained is the elastic tube 22, the part involved in the deformation is the pipe 20, and the specifications include the outer diameter D of the pipe 20, the insertion length (the length of the overlapping portion). A) L and the like. The acquisition of parts and / or specifications here may be performed based on information input from the input unit 16, or information on components and / or specifications that may be deformed in advance is stored in the storage unit 14. And the control unit 12 may automatically extract from the component group to be subjected to the component layout evaluation (step S20).

  Next, the control unit 12 acquires a post-deformation shape of a component that is deformed by assembly based on the information acquired in step S20. When the deformed shape data is stored in the storage unit 14 in advance, the control unit 12 acquires the deformed shape data corresponding to the information acquired in step S20 from the storage unit 14. FIG. 4 is a diagram illustrating an example of the division of the deformed shape data stored in the storage unit 14. As shown in FIG. 4, the storage unit 14 stores the post-deformation shape data by classifying it according to the parts that are deformed by the assembly, the parts that are involved in the deformation, the specifications of the parts that are involved in the deformation, and the like. Is preferable (step S21).

  Next, the control unit 12 arranges (fittings) the post-deformation shape data acquired in step S21 on the calculation space coordinates in accordance with the position and orientation of the part provisionally determined in step S10. As an example, when the representative points (for example, two points) of the deformed shape data are defined in advance corresponding to the representative points (the two points) of the part to be deformed or the part involved in the deformation, the control unit 12. Arranges the deformed shape data on the calculation space coordinates so that these representative points match (that is, calculates the coordinates of the deformed shape data in the calculation space coordinates). It should be noted that the representative point of the deformed shape data is also preferably stored in advance in the storage unit 14 (step S22).

  Next, the control unit 12 registers the post-deformation shape data arranged in step S22 in the storage unit 14 as a component to be deformed, a part of the component, or another component. FIG. 3B is a diagram illustrating an example when the deformed shape data of the elastic tube 22 illustrated in FIG. 3A is registered as a part 22 b of the elastic tube 22. In this case, the control unit 12 converts only a predetermined region (deformed portion) having a shape different from the deformed shape data into the deformed shape data from the elastic tube 22 (FIG. 3A) whose layout has been temporarily determined in step S10. Replacement (the replaced area is 22b), and the other area 22a is left as it is. And the control part 12 re-registers in the memory | storage part 14 as the elastic tube 22 being comprised from two area | regions 22a and 22b. In FIG. 3B, the elastic tube 22 is a combination of two regions 22a and 22b, but the boundary is formed by the two regions 22a and 22b (for example, cross-sectional shape, outer diameter, etc.). ) Are preferably at the same position. Further, the post-deformation shape data may be registered as another newly added part without performing partial replacement as shown in FIG. 3B (step S23).

  <Part Layout Evaluation: S12> Then, the control unit 12 performs well-known component layout evaluation, that is, determination of presence / absence of inter-component interference and / or inter-component distance for the component registered in the storage unit 14 as a component layout evaluation target. The calculation of is performed. Specifically, for example, it is assumed that each part is constituted by a plurality of planar convex polygons (convex polygons), and a so-called recent point such as a method of performing an interference check on all or predetermined combinations of polygons. Various methods for searching can be applied. In this embodiment, by executing step S11 (S20 to S23) described above, the component layout evaluation in step S12 is performed based on the component shape after being deformed by assembly. Therefore, when these parts are actually assembled, problems such as interference between parts that did not appear in the part layout evaluation or the distance between parts that should have been confirmed by the part layout evaluation have occurred. Disappear.

  Although the preferred embodiments of the present invention have been described above, it should be understood that the present invention is not limited to the above-described embodiments, and various modifications can be made. In addition, the component which deform | transforms by the assembly | attachment in this invention is not limited to the said elastic tube.

It is a figure which shows an example of schematic structure of the components layout evaluation system concerning embodiment of this invention. It is a figure which shows an example of the flowchart of the component layout evaluation performed by the component layout evaluation system concerning embodiment of this invention. It is a figure which shows an example of the part used as the object which acquires the shape after deformation | transformation in the component layout evaluation system concerning embodiment of this invention, the part which participates in the deformation | transformation, and an example of registration of the shape data after deformation | transformation. It is a figure which shows an example of the division | segmentation of the shape data after a deformation | transformation in the component layout evaluation system concerning embodiment of this invention.

Explanation of symbols

  10 parts layout evaluation system, 12 control unit, 14 storage unit, 16 input unit, 18 output unit, 20 pipe, 22 elastic tube, 22b Part of elastic tube 22 replaced with post-deformation shape data.

Claims (6)

In a component layout evaluation system that executes the determination of the presence or absence of inter-component interference and / or the calculation of the distance between components for a plurality of components arranged in a calculation space.
A post-deformation shape acquisition unit that acquires a post-deformation shape of a part that is deformed by assembling a plurality of parts,
The component layout evaluation system, wherein the determination of the presence or absence of inter-component interference and / or the calculation of the inter-component distance is executed using the acquired post-deformation shape. In addition, a component shape storage unit that stores the pre-deformed shape obtained in advance for each component,
The component layout evaluation system according to claim 1, wherein the deformed shape acquisition unit acquires a deformed shape corresponding to a component from the component shape storage unit. The component shape storage unit further stores a post-deformation shape acquired in advance for each of the other components involved in the deformation or the specifications of the components,
3. The post-deformation shape acquisition unit acquires a post-deformation shape corresponding to a component and another component involved in the deformation of the component or a specification of the component from the component shape storage unit. Parts layout evaluation system.   The component according to any one of claims 1 to 3, wherein the post-deformation shape acquisition unit acquires the post-deformation shape of the elastic tube whose outer diameter is expanded by being attached to another component. Layout evaluation system. In a component layout evaluation method for executing determination of presence / absence of interference between components and / or calculation of distance between components for a plurality of components arranged on a calculation space,
Obtaining a post-deformation shape of a part that is deformed by assembling a plurality of parts;
The component layout evaluation method, wherein the determination of the presence or absence of inter-component interference and / or the calculation of the inter-component distance is executed using the acquired post-deformation shape. A program for causing a computer to function as a component layout evaluation system that executes determination of the presence or absence of inter-component interference and / or calculation of a distance between components for a plurality of components arranged in a calculation space, ,
Function as a post-deformation shape acquisition unit that acquires a post-deformation shape of a part that is deformed by assembling a plurality of parts;
The program for performing the determination of the presence or absence of the interference between components, and / or calculation of the distance between components using the acquired shape after a deformation | transformation.

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