ENGINEERING DRAWING

Engineering Drawing

Engineering Drawing is an Universal Language of Engineers to transfer Ideas.

Here there are lots of Different type of Sketch (projection) you can differentiate.
Prospective Projection :approximate representation view as you see by eye

Auxiliary View : use full in dislocation of portion (X-RAY)

Orthographic projection : visual ray line , parallel to each other

obliq and axonometric views : 3 view drawing

3 Principle plane
Frontal
Horizontal
Profile

Sphere has only ONE VIEW

Europe usually use :First angle view
Protector : 0.5 Degree Smallest Angle
Drafting Scale: Triangle is not available
Light Weight pencil : H
Drawing sheet Ration : 1: root2
Elevation = Top view Elevation on Vertical Plane

SHEET
A5 : 148 X 210
A4 : 210 X 297
A3 : 297 X 420
A2 : 420 X 594
A1 :594 X 841
A0 : 841 X 1189

Letter in Dwg : 7:4
3H,4H Pencil for : Center line
PENCIL IN ORDER : 18 Light Dark
9H,8H,7H,6H,5H,4H,3H,2H,H,F,HB,B,2B,3B,4B,5B,6B,7B
Drawing board Made by Ebony Material

There are Eight Types of Line
1. Continuous
2. Continuous thin
3. Short Dash
4. Long Chain
5. Chain Thick End
6. Short Chain
7. Continuous Wavy
8. Straight zig zag

ENGINEERING CURVE
e= Eccentricity
e=0, Circle
e=1 ,parabola
e<=1 , ellipse
e=>, Hyperbola

Two type of View
1. First Angle
2. Third Angle

in third Angle ( 2nd and 4th Quadrant is not used Because Top view and Front view overlap)
Top view = on Horizontal Plane
Front View = on Vertical Plane

Pictorial Projection
1. Isometric Projection (30 Degree to HP)
2. Oblique Projection (45 Degree to HP)
3. Perspective Projection

https://youtu.be/69wgGf5xR5k

Comments

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The Mechanicals

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