《工程制图》(双语)讲义-Note1

LOGOEngineering GraphicsEngineering GraphicsNorth China Electric Power UniversityYang ZhilingEmail: yzhil@ncepu.edu.cnOffice address ： F-824Please prepare the book: 《 Engineering Graphics 》 .Please prepare two kinds of pencil: H and 2B, a pair of triangles and a compass. Graphic Language and DesignIntroduction1History of Technical Drawing2Summery34ProjectionDesign ProcessA design process starts with a concept or an idea.The first stage of the project begins with the identification of a particular need for a product.The second stage involves the creation of a variety of options or design ideas. These idea may be in the form of sketches, and include mathematical computations.The third stage is the refinement of the preliminary designs. Possible solutions to the problem are identified.Design ProcessThe fourth stage involves refinement and selection of a particular design. Here the project is put in a more formal, finalized state using assembly drawings or models. This stage requires close attention to how the part is to be manufactured or produced.In the fifth stage, detail drawings are prepared. The result is a complete set of working drawings.The sixth stage in the design process is the manufacturing and production of product, or the construction of a system. SKETCHES and DRAWINGSSKETCHES and MODELSASSEMBLY DRAWINGSRefinement of the modelDETAIL DRAWINGSPLANS and ELEVATIONSDefinitionsDRAWING A drawing is a graphic representation of a real thing, an idea, or a proposed design for later manufacture or construction.  Drawings may take many forms, but the graphic method of representation is a basic natural form of communication of ideas that is universal and timeless. GRAPHIC LANGUAGE Although people arou...