外文翻译--杂志的材料加工技术英文版.doc

Journal of Materials Processing Technology 169 (2005) 1-4 Technical note The development of 3D models through rapid prototyping concepts D.M.C. Santosa, A.E.M. Pertencea, H.B. Camposa, P.R. Cetlinb,? a Department of Mechanical Engineering, UFMG, Cidade Universitária, Pampulha, 31270-901, B. Horizonte, MG, Brazil b Department of Metallurgical and Materials Engineering, UFMG, Rua Espirito Santo 35, 30160-030, B. Horizonte, MG, Brazil Received 6 November 2003; received in revised form 6 January 2004; accepted 8 June 2004 Abstract Three-dimensional models are being increasingly used as prototypes in various areas of manufacturing, research and education. They are especially useful in the evaluation of elements typical of mechanical design, but are also important in architecture, medicine, arts, etc. These models can be developed using various methods, such as mass modeling, surface planification, and rapid prototyping (RP) with removal or addition of material based on a CAD/CAM platform. This latter approach was employed in the present paper. Complex solids are formed through the association of elementary solids such as spheres, prisms, cylinders, torus, etc., and then rapid prototyping is applied involving a slicing process. A virtual model based on a CAD platform allows the determination of paths for each sliced level. These are translated into numerical control codes, and fed to a milling process of a blank, allowing the manufacturing of a 3D model. ? 2005 Elsevier B.V. All rights reserved. Keywords: 3D models; Elementary solids; Rapid prototyping 1. Introduction Mechanical parts represent an important fraction of vari-ous products widely used in our society. Fierce competition demands a permanent increase in productivity and faster re-sponse to changing technical and commercial demands on such parts. This has led to widespread use of automatic de-sign procedures, based on either traditional mechanics or on numerical methods such as finite element ana