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Engineering Drawing basics.ppt
This document provides an overview of engineering drawing and its importance. It discusses that engineering drawing is used to communicate technical information through visualization, graphics theory, standards, conventions and tools. It highlights that engineering drawing is essential for all engineering disciplines as it provides the roadmaps for manufacturing products and structures. The document also explains some basics of engineering drawing like different types of lines, geometric shapes, dimensioning, projection methods, and standards and conventions used. It emphasizes that understanding the basics is important for any subject, including engineering drawing.
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Engineering Drawing basics.ppt
- 1. HELLO, EVERYONE Created By, GovindB Nadare BE In Mechanical Engineering One Year Experience in Bajaj Auto Ltd. Waluj Aurangabad ‘Engineering Drawing’
- 2. MECHANICAL ENGINEERING What willyou learn in this course? You will learn - How industry communicates technical information. • Visualization – the ability to mentally control visual information. • Graphics theory – geometry and projection techniques. • Standards – set of rules that govern how parts are made and technical drawings are represented. • Conventions – commonly accepted practices and methods used for technical drawings. • Tools – devices used to create technical drawings and models. • Applications – the various uses for technical drawings. How drawing is important to all engineering disciplines….. 2
- 3. BASICS + ADVANCED= SUCCESS Basic of Any Subject Is CONSTANT But Not Advanced Importance Without Basics we cant make extraordinary work . Innovation is also Occurred Only Through Basics MECHANICAL ENGINEERING
- 4. Drawing Describing any object/Information Diagrammatically Engineering Drawing OR Machine Drawing Graphical means of expression of Technical details without the barrier of a Language Diagrams/sketches/pictures – communication skills • We grasp information easily if it is illustrated with diagrams, sketches, pictures, etc. MECHANICAL ENGINEERING 4
- 5. AIRBUS A380 Source: http://img.stern.de/_content/53/96/539645/A3 80_500_artikel_500.jpg MECHANICAL ENGINEERING LCA- the world's smallest, light weight, multi-role supersonic combat aircraft of the world • A picture/drawing is worth a thousand words.. • The LCA/Airbus A380 would be impossible to create without computer graphics and drawing models. •Drawings are the road maps which show how to manufacture products and structures. 5
- 6. Mechanical machine Chemical reactor Civilstructure Electrical circuit Important for all Branches MECHANICAL ENGINEERING 6
- 7. MECHANICAL ENGINEERING Graphical representationof an object – Drawing • Engineering drawing – A drawing of an object that contains all information -like actual shape, accurate size, manufacturing methods, etc., required for its construction. -No construction/manufacturing of any (man -made) engineering objects is possible without engineering drawing. 7
- 8. MECHANICAL ENGINEERING Engineering drawingis completely different from artistic drawing, which are used to express aesthetic, philosophical, and abstract ideas. Engineering Drawing has a specific calculation base. How Different From Artistic Drawing???? 8
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- 10. MECHANICAL ENGINEERING Itemsrequired for drawing Items required for drawing Drawing board Drawing sheet Mini-drafter/drafting machine/ T- square Instrument box containing compass, divider, etc. Scales Protractor French curves Drawing pencils Eraser Drawing clip/pin/adhesive tape Sharpener Duster 11
- 11. MECHANICAL ENGINEERING Last twosizes are normally used for student drawing Drawing board must be placed on the table with working edge always to be at the left side. Working edge 12
- 12. MECHANICAL ENGINEERING Mini-drafter –a miniature version of the drafting machine 13
- 13. MECHANICAL ENGINEERING Mini-drafter fixedon drawing board 14
- 14. MECHANICAL ENGINEERING Some drawinginstruments 15
- 15. MECHANICAL ENGINEERING Standard sizesof drawing sheets as per BIS 16
- 16. MECHANICAL ENGINEERING Lay outof a drawing sheet 17
- 17. MECHANICAL ENGINEERING Drawing Pencils Woodenpencils – are graded and designated by numbers and letters Mechanical clutch pencils – Not allowed • 7B, 6B, 5B, 4B, 3B, 2B, B - in decreasing order of softness and blackness • HB to F – Medium grade • H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H – increasing order of hardness. Drawings are done using 2H pencils and finished with H and HB pencils – to be practiced in this course. 18
- 18. MECHANICAL ENGINEERING Uses ofdifferent types of lines in a given drawing 19
- 19. Standards and Conventions Noeffective communication without an agreed upon standard of signs or symbols. Standards and conventions are the alphabet of technical drawing, and plane, solid, and descriptive geometry are the science(grammar) which underlies the graphics language. Following the standard rules (grammar) of any language (Hindi/English) – communication of thought between people becomes easier. If words in a sentence were presented randomly – understanding becomes very difficult. For effective communication of technical (graphics) information– set of standards and conventions – a must. Standards and Conventions – very important MECHANICAL ENGINEERING 21
- 20. Conventions – commonlyaccepted practices, rules, or methods. Dashed lines are used to represent hidden features of an engineering drawing.. Hidden lines – location of drilled hole’s diameter, in a view where the hole cannot be directly seen. MECHANICAL ENGINEERING 22
- 21. Drawings are dimensionedusing an accepted set of standards such as placing the dimension text such that it is read from the bottom of the sheet. Standards – set of rules that govern how technical drawings are represented.. 23
- 22. Drawing standards ANSI –American National Standards Institute ANSI Y14.1 1980 (R1987) – Drawing sheet size and format ANSI Y 14.2M-1979 (R1987) – Line conventions and lettering ANSI Y14.5M-1982(R1988) – Dimensioning and tolerances ANSI Y 14.3-1975(R1987) – Multi view and sectional view drawings ISO – International Standards Organization JIS – Japanese Standards BIS – Bureau of Indian Standards MECHANICAL ENGINEERING 24
- 23. Basic geometric shapesused in drawing 25
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- 27. Arrows – 3mm wide and should be 1/3rd as wide as they are long - symbols placed at the end of dimension lines to show the limits of the dimension. Arrows are uniform in size and style, regardless of the size of the drawing. MECHANICAL ENGINEERING 32
- 28. Aligned method Unidirectionalmethod MECHANICAL ENGINEERING 33
- 29. Angle Of PROJECTION: Popularonly TWO types 1)First Angle Projection 2)Third Angle Projection MECHANICAL ENGINEERING 34
- 30. Thank you…………………. Any Question????? MECHANICALENGINEERING If any doubt then text me -- [email protected] 8390214842 35