ENGG1100 Introduction to Engineering Design

May 9th, 2015
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An engineering drawing is a type of technical drawing used to fully and clearly define requirements for engineered items (from en.wikipedia.org)

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ENGG1100 Introduction to Engineering DesignIntroduction toEngineering DrawingProfessor Yunhui LiuDept. of Mechanical and Automation EngineeringSpring, 2014MAE Dept., The Chinese University of Hong Kong1What is Engineering Drawing? An engineering drawing is a type of technicaldrawing used to fully and clearly definerequirements for engineered items (fromen.wikipedia.org) a formal and precise way (graphiclanguage) for communicatinginformation about the shape and size ofphysical objects. a mean for specifying the precision ofphysical objects.Important as it is a legal document, i.e., ifthe drawings are wrong, it is the fault of theengineers!MAE Dept., The Chinese University of Hong Kong2Why ? Effectiveness of Engineering Drawing1. Try to write a description ofthis object.2. Test your written descriptionby having someone attemptto make a sketch from yourdescription.You can easily understand that The word languages are inadequate for describing thesize, shape and features completely as well asconcisely.MAE, CUHKFrom Lec. Bhuiyan Shameem MahmoodGraphic LanguageGraphic language in engineering applications useslines to represent the surfaces, edges and contoursof objects.The language is known as drawing or drafting .A drawing can be done using freehand, instrumentsor computer methods.From Lec. Bhuiyan Shameem Mahmood5Freehand drawingThe lines are sketched without using instruments ot

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