Lecture4

# Lecture4 - Lecture 4 MAE 52 Lecture 4 1 Drafting Basics...

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Lecture 4 1 Lecture 4 MAE 52

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Lecture 4 2 Drafting Basics
Lecture 4 3 Drafting Basics Sheet sizes (p 35) Different ones Border (p 36-37) Title block Revision block Shows revision history of the part Often done with letters (A, B, C, …)

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Lecture 4 4 Paper Sizes
Lecture 4 5 Basic Dimensioning We’ll talk much more about this later. Let’s just cover basics now Numerical values indicated on a drawing that define the size , position , or geometric characteristic of a part or part feature Dimension lines Extension lines Leader lines

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Lecture 4 6 Dimension, Extension, and Leader Lines Dimension Line Extension Line Leader Line
Lecture 4 7 Sections (Chapter 9) Imaginary cut to reveal inner geometry Sectional views Full – cuts completely through the part Half – for symmetrical objects or cylindrical shapes Staggered or offset – if features do not lie in a single plane Broken out Revolved Removed Sections for Assemblies Do not section fasteners (bolts) Conventional breaks (SW may not do these!)

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Lecture 4 8 Overview Sections are used to show interior details clearly. A cutting-plane line shows where object was cut to obtain the section view.
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