The objective of this book is to help the readers to understand the fundamentals of computer-aided design （CAD） concepts and become familiar with the operations in CAD modeling so as to effectively use CAD approaches for mechanical product design. The commercial CAD system， UG NX is employed as the platform for CAD environment. In Chapter 1， the brief introduction to the development process of 3D modeling techniques in CAD and its applications to mechanical design are given. Following this introduction， important topics in product modeling using UG NX， including the basics of UG NX， sketch， part modeling， assembly modeling， drawing and 3D annotation are provided. This book aims at providing a textbook for graduate students of science and technology universities whose major are Mechanical Design Manufacturing and Automation， Automobile Engineering， Mechanics， Process Equipment and Control Engineering， etc. This book provides the main guidelines for the reader to apply 3D software tools to support practical design application. Moreover， this book provides engineering senior a comprehensive reference to learn advanced technology in support of engineering design using 3D CAD technology. In addition to classroom instruction， this book should support practicing engineers who wish to learn more about the e-Design paradigm at their own pace.
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