Week 2_2D_Profile_Projection.pdf - MIET 2461 Biomedical CAD — Lecture 2 2D Profile and Planar Projection by Dr Toh Yen Pang [email protected]

# Week 2_2D_Profile_Projection.pdf - MIET 2461 Biomedical CAD...

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1 Lecture 2 2D Profile and Planar Projection by: Dr. Toh Yen Pang [email protected] 9925 6128 B251.3.22 MIET 2461 Biomedical CAD
2 Objectives Creating a new drawing/Sketching Drawing Standards & Conventions Line types & 2D Geometry constructions
3 Knowledge and Skills Require Graphics language Word language Dimensions & Notes Visualization is the ability to mentally picture things that do not exists. Visualization Using line types Geometric construction Projection method Engineering Drawing
4 Sketch & Technical Drawing Freehand sketches capture and document the ideation process. Later in the process, CAD models and drawings capture the design and sufficient details necessary for manufacturing. Example :
5 Standards Standards are set of rules that govern how technical drawing are represented Drawing standard are used so that drawings convey the same meaning to everyone who reads them
6 ISO I nternational S tandards O rganization Standard Code ANSI A merican N ational S tandard I nstitute USA JIS J apanese I ndustrial S tandard Japan BS B ritish S tandard UK AS A ustralian S tandard Australia D eutsches I nstitut f ü r N ormung DIN Germany Country Code Full name
7 Common types of sketching lines
8 Line Styles (1/2)
9 Line Styles (2/2)
10 3DExperience
11 Sketch Support/Sketcher
12 Drawing 2D Shape Some examples of common shapes are: Circles Squares/rectangles Triangles Polygons
13 Dimensioning Dimensions provide the description of the size and location of entities Dimensions also give distances between elements, lines and points, circle radii
14 Types of Constraints A list of common (but not all possible) constraints that can be found in CAD systems is: 1. Vertical 2. Horizontal 3. Parallel 4. Perpendicular 5. Bisector 6. Midpoint 7. Fixed 8. Tangency 9. Coincidence 10. Distance constraints 11. Angular constraints
15 2-D geometry 1. Straight line (Horizontal, vertical and Inclined) 2. Arc, circle and curve A two-dimensional geometry is always composed of Example
16 Geometrical

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