What is Engineering?

What is Engineering?Why do we draw?

Why do we need drawings

Why do we need drawings (cont)

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So whats this class about?

What do these items have in common?

Every item that is manufactured, patented or produced has to have engineering drawings created for it.

Multiview drawings describe the shape & characteristicsPictorials show what the item looks like!Parts lists shows each piece of the assemblySection view shows insideTitle block shows what the part is & who drew it!

Role of the DraftspersonTo define engineering intent and express ideas effectively using a graphic language.

Drafting & Design

Engineering Based Conveys information Universal Language Detail Oriented Hand Drawn or Computer Aided Used in all areas of Commerce

Where Do We Use It? Construction Electronics Automotive Manufacturing Medical Retail Logistics

How Do We Use It? Drawing is a universal language used to convey ideas and information. Used to represent items that may not physically exist. Symbols used to provide information across language barriers. Used to create products and goods.

PRESENTATION TYPES Sketching Manual Drawing - Drafting Computer Aided

SKETCHING Used to process development. Usually freehand May be a drawn from any angle or view.

SKETCHINGADVANTAGESDISADVANTAGES Quick Only need pencil & paper Good for getting ideas out Used for thumbnails, problem solving, brainstorming May not be clear Little detail Not very accurate

Mechanical DrawingUses hand tools such as rulers, templates, compasses, triangles and a variety of pencils to create working drawings.May be very simple 2 view drawings or complex, multi-view, multi-page drawings.Shows detail.

Mechanical DrawingADVANTAGESDISADVANTAGES Very detailed Accurate Draftsman can draw asmany views as needed. Provided employmentfor many people. If error made - difficult to correct. Easy to damage/destroy Time consuming Needed specific tools.

Computer Aided Modern technology to do an old job. Allows for more detail and accuracy. Faster than traditional methods.

Computer AidedADVANTAGESDISADVANTAGES Faster More accurate Able to show more details, more views. Cost effective (other than initial investment) Must have computer Garbage In Garbage Out Draftsman no longer needs to understand as much as before.

Mechanical Vs CADDMechanicalCADDUsually to the hundreths of an inch

Pencil or ink on paper, vellum or mylarTo ten- thousanths of an inch

On screen using mouse, keyboard, or digitizer then printed to mediaAccuracyMedia

Mechanical Vs CADDMechanicalCADDCopy originals using blueprint machine

Must be stored in a cool, dry area. Prone to decay, mildew & rotPrint only parts needed to a printer.

Save to disk, server, Flash drive, etc NO need to keep paper copy.DistributionDurability

Mechanical Vs CADDMechanicalCADDErase original or do over. Check any calculation done using wrong info.

Keep liquids away! Use eraser pads for some marks. Hope no ink lines were smudged.Correct on screen and save. Most dimensions and calculations will reset.Able to erase construction lines by clicking.If mistake is madeClean-up

Tools: Mechanical Drawing Table & Chair - usually height and angle adjustable T-squares and rulers Pencils, pens and erasers Compass, protractors, triangles, French curves Templates

Tools: CADD CPU or Server to run software Software Storage device - flash or hard drive, CD Monitor Input device - mouse, keyboard, digitizer Output device - printer Net access to electronically share files

Why Know the Old Way May not have access to computer May not have compatible programs Gives the Draftsman a better understanding of what is being created. Givers the Reader a better understanding of how and what a drawing is saying.

REMEMBER!!!DRAWING IS AUNIVERSALLANGUAGE

REMEMBER!!!

A DRAWING MAY BE A LEGAL DOCUMENT

REMEMBER!!!

DRAWINGS MUST BE DRAWN CLEARLY and ANNOTATED CORRECTLY

REMEMBER!!!When proper notes, symbols and dimensions are added to a drawing, a working drawing is created.

Terms to Know CIM: Computer Integrated Manufacturing- Use of computers and CAD/CADD programs to control CAD: Computer AidedDesign; Computer AidedDrafting CADD: ComputerAided Drafting & Design Working Drawing: Aengineering drawing thathas notes and dimensions