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What is engineering
This document discusses the importance and uses of technical drawings. It explains that drawings are used to represent manufactured items and are a universal language for conveying design information. The document outlines different types of drawings, including multiview, pictorial, and section drawings. It also compares manual and computer-aided drafting, noting advantages like speed and accuracy with CAD. Key applications of drawings in fields like construction, manufacturing, and engineering are also highlighted. Finally, it emphasizes that drawings must be detailed, annotated, and drawn clearly to effectively communicate design specifications.
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What is engineering
- 1. Why do wedraw?
- 2. Why do weneed drawings
- 3. Why do weneed drawings (cont…)
- 7. So what’s thisclass about? What do these items have in common?
- 8. Every itemthat is manufactured, patented or produced has to have engineering drawings created for it.
- 11. Multiview drawings describe theshape & characteristics Pictorials show what the item looks like! Parts lists shows each piece of the assembly Section view shows inside Title block shows what the part is & who drew it!
- 12. Role of theDraftsperson To define engineering intent and express ideas effectively using a graphic language.
- 13. Drafting & Design •Engineering Based • Conveys information • Universal Language • Detail Oriented • Hand Drawn or Computer Aided • Used in all areas of Commerce
- 14. Where Do WeUse It? • Construction • Electronics • Automotive • Manufacturing • Medical • Retail • Logistics
- 15. How Do WeUse 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.
- 16. PRESENTATION TYPES • Sketching •Manual Drawing - Drafting • Computer Aided
- 17. SKETCHING • Used toprocess development. • Usually freehand • May be a drawn from any angle or view.
- 18. SKETCHING ADVANTAGES DISADVANTAGES • 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
- 19. Mechanical Drawing Useshand 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.
- 20. Mechanical Drawing ADVANTAGES DISADVANTAGES •Very detailed • Accurate • Draftsman can draw as many views as needed. • Provided employment for many people. • If error made - difficult to correct. • Easy to damage/destroy • Time consuming • Needed specific tools.
- 21. Computer Aided • Moderntechnology to do an old job. • Allows for more detail and accuracy. • Faster than traditional methods.
- 22. Computer Aided ADVANTAGES DISADVANTAGES •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.
- 23. Mechanical Vs CADDMechanicalCADD Usually to the hundreths of an inch Pencil or ink on paper, vellum or mylar To ten- thousanths of an inch On screen using mouse, keyboard, or digitizer then printed to media Accuracy Media
- 24. Mechanical Vs CADDMechanicalCADD Copy originals using blueprint machine Must be stored in a cool, dry area. Prone to decay, mildew & rot Print only parts needed to a printer. Save to disk, server, Flash drive, etc… NO need to keep paper copy. Distribution Durability
- 25. Mechanical Vs CADDMechanicalCADD Erase 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 made Clean-up
- 26. Tools: Mechanical Drawing •Table & Chair - usually height and angle adjustable • T-squares and rulers • Pencils, pens and erasers • Compass, protractors, triangles, French curves • Templates
- 27. Tools: CADD • CPUor 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
- 28. 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.
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- 30. REMEMBER!!! A DRAWING MAY BEA LEGAL DOCUMENT
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- 33. Terms to Know •CIM: Computer Integrated Manufacturing - Use of computers and CAD/CADD programs to control • CAD: Computer Aided Design; Computer Aided Drafting • CADD: Computer Aided Drafting & Design • Working Drawing: A engineering drawing that has notes and dimensions