Method and system for generating CAD (computer-aided design) data models by means of deformation

Abstract

The invention relates to a method and a system for generating CAD (computer-aided design) data models by means of deformation. The method includes processing an existing CAD data model in a discrete manner to form spatial point cloud data; generating a control module comprising hexahedral mesh units according to requirements on designed deformation of a mechanical component; connecting the control module with the spatial point cloud data to form a linkage relation; changing the control module in modes such as spatial projection, stretching, scaling and twist transformation according to design requirements, and allowing the linked initial spatial discrete point cloud data to correspondingly deform along with the control module to obtain deformed spatial point cloud data; fitting the deformed discrete spatial point cloud data to regenerate deformed continuous dots, lines and planes and enabling deformed and refit dot, line and plane data to have continuous function relations identical to continuous function relations of the original CAD data model. The method and the system have the advantages that the data of the original CAD data model can quickly and efficiently deform according to the design objective requirements, so that data of an objective CAD data model can be obtained, the design cycle is shortened, and the design cost is saved.

Description

technical field [0001] The invention relates to a method and system for generating deformation of mechanical engineering graphics, in particular to a method and system for generating deformation of CAD digital model. Background technique [0002] In order to develop the synchronous research and development capabilities of the preliminary engineering projects of automobiles, aerospace, aviation, ships, heavy industry machinery, etc., a method that can be directly used on the basis of existing CAD data of mechanical parts (CAD data is used to describe the geometric characteristics of designed products) Modify the deformation to quickly obtain the target CAD design data that can be used for R&D or production. [0003] The traditional design method is to redesign on the basis of reference data, that is, for the part of the CAD digital model that changes the spatial shape, it is necessary to rely on the CAD design engineer to manually regenerate the spatial geometric relationship...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a deformation generation method and system of CAD digital model, which mainly solves the defect that the traditional design method is time-consuming and inefficient, and needs to go through multiple revision cycles to reach the standard. It can quickly and efficiently according to the design The goal requires that the original CAD digital-analog data be deformed and generated to obtain the target CAD digital-analog data, thereby saving design cycle and design cost

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