me 160: mechanical engineering drawing-i
TRANSCRIPT
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ME 160: Mechanical Engineering Drawing-I
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Introduction
Drawing is a graphic language
Drawing is the language of engineers
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Basic Views
In general, there are 2 types of views
2 dimensional views Orthographic View
3 dimensional viewsDimetric ViewTrimetric ViewIsometric View
Orthographic Views and Isometric Views will be of our main interest in this course.
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Views of a Solid
A solid object has 66 sides. Six Orthographic Views can be drawn from six sides.
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Projected Views on a Plane
Orthographic Views are generated by projecting the edges of a solid on a plane.
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Types of Projection
First angle projection
Viewer Object Projection plane
Third angle projection
ViewerProjection
planeObject
Relative position of viewer, object and projection plane
There are 2 types of projection
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Formation of Quadrants
1st Quadrant
3rd Quadrant
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A Solid Block
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Placement of Solid
First Angle Projection
Third Angle Projection
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First Angle Projection
Viewer ObjectProjection
plane
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Third Angle Projection
Viewer ObjectProjection
plane
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Solid Block Observation
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Solid Block Observation
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Solid Block Observation
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Solid Block Observation
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Development of Views
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Development of Views
TOP VIEW
RHS VIEWFRONT VIEW
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Development of Views
TOP
RIGHT HAND SIDEFRONT
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
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Development of Views
TOP VIEW
RHS VIEWFRONT VIEW
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Development of Views
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Different types of lines
Object line
Hidden line
Center line
Cutting plane line
(Different line thickness for different types of lines)
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Instruments
Drawing board/table Drawing sheet Drafting tape T-square Set square Compass and divider Pencil (HB, 2B) Eraser
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Set-Squares
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Compass and Divider
To draw circles and round edges Compass and Divider will be used
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Preparing Drawing Table
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Preparing Drawing Table
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Preparing Drawing Table
Affix 4 corners of the drawing sheet like this
With the help of drafting tape
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Use of Set-squares and T-Square
Draw a horizontal line
Draw a vertical line
Draw Parallel lines
Draw Inclined lines
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Drawing Sheet Preparation
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Drawing Sheet Preparation
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See You in the Class
Have a Nice Time!