中英文文献翻译—反求工程

附录

附录A 外文文献原文

The physical model of product surface measurement, according to the process of reverse engineering of measuring point cloud data complete product model 3 d CAD model in engineering practice, a wide range of applications. Reverse Engineering (Reveme Engineering) in the field of product design is a key technology, is based on existing product model, reverse launched the product design data (including design drawings or mathematical model) process. Specifically, reverse engineering, is the main work for existing parts, use 3 d digital measuring system accurate and fast for point cloud data, through curved surface reconstruction and editing, modify, get can be used to design and manufacture of the CAD model following the.

Imageware is widely used home and abroad the reverse software, has the formidable measurement data processing, curve fitting of surface, error detection function. Can handle tens of thousands or even millions of point cloud data. According to the point cloud data can be tectonic level A curved surface with good quality and surface continuity. Imageware software in the treatment of the point cloud data and characteristic curve fitting aspects have advantages, but the offer surface modeling and auxiliary means and function complete commercial CADCAM software, there is still a gap compared

CATIA V5 is now widely used high-end CAD/CAM/CAE software system, the reverse function mainly consists of two modules to complete: digital editor module (DSE) and fast surface create module (QSR digital editor module DSE is mainly used to complete the point cloud of input, filter, generating grid curved surface and generate scan lines, fast surface create module of the function is include further QSR generated curve and surface filling, Gui bai processing, surface analysis. In actual work, two module interaction, can complete the point cloud use the rapid processing, curve and surface reconstruction, 3 D model establishment, etc.

Combined with Imageware and the use of the software of CATIA, by optical measurement system of the shell on hand point cloud, and then based on the surface reconstruction in the reconstruction of curved surface as a reference to achieve the internal parts of the machine design. Again motor.

Reverse engineering of the main purpose is to improve enterprise technical level, increase productivity and enhance economic competitiveness. Reverse engineering technology should be specific.In the following aspects:

(1) The new parts design, mainly for the product modifications or copy form design.

(2) For some parts of the design of the original copy, recreating the intention.

(3) Damage or wear parts of reduction. When parts of damage or tear and wear, can be directly used to reverse engineering method of reconstruction of the CAD model the damaged parts surface reduction and repair.

(4) Digital model test. On the processing of parts after scans measured, reuse of reverse engineering constructed CAD model, through the model and the will of the original design CAD model in computer data comparison, can detect errors and improving manufacturing precision.

Reverse engineering system concrete implementation plan, make full use of the existing system resources and processing equipment modernization imitation of the form design, manufacture, as a new technology in the product design development and manufacturing, can greatly shorten the development cycle, the design technology in rapid product design development and the factors in numerical control processing surface is of great significance.