Part CAD model similarity estimation method and system

Abstract

The invention relates to the field of digital design, and provides a part CAD model similarity estimation method and system. The method comprises the steps: processing the feature data of a part CAD drawing in a part library, and generating first data and second data; feature data of the part CAD drawing are obtained, the feature data comprise third data and fourth data, normalization processing is conducted on geometric dimension parameter data in the third data, and fifth data are generated; convolution calculation processing is carried out on the fourth data to generate sixth data; similarity calculation is carried out on the fifth data and first data in a part library; similarity calculation is carried out on the sixth data and second data in a part library; the similarity data and thepart CAD drawing preview data of the part library are returned, so that a product designer can select similar part CAD drawings from the existing part library to perform quick product design, the workload of repeated design is reduced, and the product collaborative design efficiency is improved.

Description

technical field [0001] The invention relates to the field of digital design, in particular to a method and system for estimating the similarity of CAD models of parts. Background technique [0002] The PDM system (Product Data Management, PDM) manages all product-related information, including part information, configuration, documents, CAD files, structures, authority information, etc., and all product-related processes, including process definition and management. Enterprises implement PDM Systematic management can improve production efficiency, facilitate the management of the entire life cycle of products, strengthen the efficient use of documents, drawings, and data, standardize the workflow, and have a wide range of applications in the process of enterprise product data management. [0003] CN108710733A discloses a method for identifying the global symmetry of a dynamic assembly CAD model based on rules, including: step 1: classify all parts into several consistent par...

AI Technical Summary

Problems solved by technology

[0004] In the current stage of enterprise product digital design, product designers select similar parts from the existing parts library for product design, but different companies have different codes for some parts and different parts library management specifications, and some even need to rely on the Internet Due to the open parts library resources on the Internet, it is difficult to quickly find suitable similar parts when participating in joint development and collaborative design, which affects the efficiency of collaborative design

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