3D Shape Information Calculation in CAD Systems
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Solution Overview
Problem
Conventional techniques require pre-stored information for virtual mold models and limit dimension information display to what can be analyzed from two-dimensional drawings, preventing the calculation of desired three-dimensional shape information for unsaved selections and restricting displayable dimensions.
Innovation Solution
An information processor with a three-dimensional-shape input unit, display unit, and shape-value-information calculating unit that allows users to input and display three-dimensional shapes, calculate dimensions between designated shape elements, and reflect the results in an NC program, enabling the calculation of desired three-dimensional shape information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-stored information is required for virtual mold models, then information accuracy is improved, but system complexity and operation difficulty increase
Solution Approach 1:
The system automatically calculates and generates three-dimensional shape information by processing drawing data through coordinate system conversion and shape element extraction, eliminating the need for manual pre-storing of information and reducing operational complexity
Solution Approach 2:
The system pre-processes drawing data by establishing coordinate systems and extracting shape element relationships in advance, enabling rapid retrieval and calculation of three-dimensional shape information without requiring pre-stored model data
2Ease of operation
If dimension information is displayed from two-dimensional drawings, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The system transitions from two-dimensional drawing data to three-dimensional shape information by performing coordinate system conversion and spatial relationship calculation, enabling accurate three-dimensional dimension measurement while maintaining ease of operation through automated processing
3Measurement precision
If pre-stored information is required for displaying dimensions, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically calculates three-dimensional shape information by processing drawing data through coordinate conversion and shape element extraction, eliminating the need for manual pre-storing operations and enabling users to obtain accurate measurements simply by inputting drawing data
Data Source
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AI summary
An information processor that calculates information concerning a three-dimensional shape comprises: a three-dimensional-shape input unit (11) that inputs drawing data of a three-dimensional shape used for displaying a three-dimensional shape; a display unit (16) that displays a three-dimensional shape of drawing data input to the three-dimensional-shape input unit; and a shape-value-information calculating unit (13) that sets a shape element of a three-dimensional shape displayed on the display unit to data used for calculating a three-dimensional shape, based on an instruction input from outside, calculates a value of a shape concerning the three-dimensional shape not clearly shown within the drawing data as shape value information by using the set shape element, and displays a calculation result on the display unit.