Communication Technology IOT POLY ENGINEERING 2-9 November 8, 2010 Closed-Notes Quiz Remove everything from your work space except for a pencil and a straightedge. Communication Technology

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Objectives 2-9 The remainder of Unit 2: IOT POLY ENGINEERING 2-9 The remainder of Unit 2: Technical Graphic Communication Objectives Cover the 3 main technical drawing types and their ~12 variations Establish class standards for technical drawing Further develop and apply skills in drafting Develop and apply skills in AutoCAD and Sketchup Technical Graphic Communication

SKETCHES 2-9 1 One of many drafting techniques IOT POLY ENGINEERING 2-9 SKETCHES 1 One of many drafting techniques Quick way to show an idea that would be difficult to describe with words alone Used mainly in Engineering Design Process Step 2: Brainstorm, Research, and Generate Ideas NO DRAWING TOOLS (not even a straightedge) Rules of drawing STILL APPLY Pull, don’t push LIGHT construction lines Use appropriate line weight and type TYPE 1: SKETCHES

MULTI-VIEW 2-9 2 Orthographic Projections: IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 Orthographic Projections: Ortho: straight or at right angles Graphic: written down Pro: forward Jacere: to throw “To throw straight forward and write down” The method of representing the exact form of an object in 2 or more views on planes (usually at right angles to each other) TYPE 2: MULTI-VIEW

MULTI-VIEW 2-9 2 There are 6 standard views: Which views to use? IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 There are 6 standard views: Which views to use? The different features of an object will suggest which views to draw. Standard is: TYPE 2: MULTI-VIEW

How are orthographic projections drawn? IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 TYPE 2: MULTI-VIEW How are orthographic projections drawn?

MULTI-VIEW 2-9 2 TYPE 2: MULTI-VIEW Reference Planes: IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 Reference Planes: Frontal Reference Plane Front View Horizontal Reference Plane Top View Profile Reference Plane Side View TYPE 2: MULTI-VIEW

IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 Frontal Reference Plane Front View Horizontal Reference Plane Top View Profile Reference Plane Side View Now, sketch the Horizontal Reference Plane and label the view and other planes. Which Reference Plane? HRP TYPE 2: MULTI-VIEW Which Reference Plane? HRP Which View? FRONT Which Reference Plane? Which View? PRP RIGHT Which Reference Plane? FRP

MULTI-VIEW 2-9 2 TYPE 2: MULTI-VIEW Reference Planes: IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 Reference Planes: Frontal Reference Plane Front View Horizontal Reference Plane Top View Profile Reference Plane Side View TYPE 2: MULTI-VIEW Which View? Which Reference Plane? TOP PRP Which Reference Plane? FRP

MULTI-VIEW 2-9 2 Reference Planes: IOT POLY ENGINEERING 2-9 MULTI-VIEW 2 Reference Planes: You can also have multiple positions of the same reference planes

SECTIONAL VIEWS 2-9 2 Sectional Views TYPE 2: MULTI-VIEW IOT POLY ENGINEERING 2-9 SECTIONAL VIEWS 2 Sectional Views How an object looks if a cut were made through it perpendicular to the direction of sight. For example, if we cut the shape below at PRP 2 and drew the shape (including its “insides”) we would have a sectional view: TYPE 2: MULTI-VIEW

SECTIONAL VIEWS 2-9 2 Sectional Views TYPE 2: MULTI-VIEW IOT POLY ENGINEERING 2-9 SECTIONAL VIEWS 2 Sectional Views Different materials have different sectional views TYPE 2: MULTI-VIEW