Lecture--Week02 - Introduction to Technical Sketches and...

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Introduction to Technical Sketches and Engineering Drawings Dr. Thomas E. Doyle, P.Eng Department of Electrical and Computer Engineering
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Lecture Objectives Geometry of Engineering Graphics 2D DOF De±ne projection types: Isometric Multiview
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Sketching Elements In technical sketching you will be creating drawings for the purpose of sharing ideas visually. This is a critical skill in engineering design for all disciplines. Balance quickness vs neatness - the goal is to communicate your idea efFciently. All sketches will be comprised of two basic elements: Lines Curves (usually circular or elliptical) You will learn to make two kinds of sketches: Isometric (looks 3D) Multiview (looks 2D)
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Any object can be defned by its boundary . This boundary is made up o± sur±aces, called ±aces . Each ±ace is bounded by edges . Each edge is bounded by vertices . Faces can be any mathematically defnable sur±ace but we will usually restrict ourselves to planar, cylindrical, conical, and spherical sur±aces. Edges can be any curves in three-space but we will generally restrict ourselves to lines, circular arcs, and elliptical arcs. However, the intersection o± simple primitives such as two cylinders will result in more complex curves. Most objects can be described as a composition o± patches o± planar,
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This note was uploaded on 02/17/2011 for the course ENGINEERIN 1C03 taught by Professor T.doyle during the Spring '10 term at McMaster University.

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Lecture--Week02 - Introduction to Technical Sketches and...

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