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Three-dimensional cad system

A computer, three-dimensional technology, applied in the field of three-dimensional CAD system, can solve the problems of no display, mismatch, etc.

Inactive Publication Date: 2007-08-29
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is possible to define shapes before and after assembly in a part model and switch shapes without display
However, when this method is used, the shape after assembly and the shape before assembly sometimes do not match because the content is also reflected in the shape of the 2D drawing at the same time as the shape is switched.

Method used

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  • Three-dimensional cad system
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  • Three-dimensional cad system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0031] An embodiment of the invention will be described by way of example. Fig. 1 is a block diagram showing a three-dimensional CAD system representing an example of the present invention.

[0032] In FIG. 1 , the 3D CAD system includes a computer including an input unit (input device) 10 , a database (storage source) 12 , a computing unit (processing device source and interface) 14 and a display unit (display device) 16 .

[0033] The input unit 10 is configured as input means for inputting various data of a part model, a product model, and the like into the calculation unit 14 .

[0034] The calculation unit 14 stores the data input from the input unit 10 into the database 12, performs various types of calculations based on the input data and operation programs, sets restrictions, etc., stores data such as calculation results and restrictions into the database 12, and stores data such as calculation results and restrictions in the database 12, according to various Constrai...

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PUM

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Abstract

It is possible to match a parts model with a two-dimensional drawing. A parts model has shape changing elements whose shapes are changed before and after assembling and other common elements. Three-dimensional shape data on the shapes of the shape changing elements before assembling and their shapes after assembling and the shapes of the common elements are stored as three-dimensional shape data on the parts model in database 12 . A calculation unit 14 sets a restriction condition to become a single part between the shapes of the shape changing elements before assembling and the shapes of the common elements for the three-dimensional shape data stored in the database 12 and sets a restriction condition to become a single part between the shapes of the shape changing elements after assembling and the shapes of the common elements, so that three-dimensional shape data is spread into the two-dimensional drawing according to the restriction condition and displayed on the screen of the display unit 16.

Description

technical field [0001] The present invention relates to three-dimensional CAD systems, and more particularly to three-dimensional CAD systems suitable for the preparation of two-dimensional drawings based on three-dimensional shape information of a model. Background technique [0002] Three-dimensional CAD systems having functions of projecting shapes from prepared models and preparing two-dimensional drawings are well known. In this type of three-dimensional CAD system, a component model representing a component and a product model representing a state of combining the component model are utilized as models. Typically, the part model defines the state before assembly into a product, and the product model defines the state after the assembly of the part and defines the constructed part as a hierarchical structure. When a part whose shape is changed between a state as a component part and an assembled state appears in a product, for example, a part to which press processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06T19/00G06T19/20G06T2219/2008G06T2219/2021G06F30/17
Inventor 今西贤治
Owner NSK LTD