Alphabet of Lines Sketching
OBJECTIVES • 6 types of lines • What is sketching
Sketching • What is it: • A simple, visual way of communicating a design. • Rough drawing of an object. • Why create a Sketch: • Done quickly, without the use of tools (freehand). • Shows an outline and few details of an object.
Construction Visible Line Hidden Line Center Line Extension Dimension 3” 6 types of lines
Construction Lines • Extremely light lines used for constructing a drawing.
Visible Lines • Dark lines of the actual object which are drawn over the lighter construction lines.
Hidden Lines • Used to show invisible parts that otherwise could not be shown.
Center Lines • Used to show the center of a circle or hole.
3” Extension Lines • Extend from the object with a gap about 1/16”
3” Dimension Lines • Has an arrowhead at each end indicating the length of the object.
End of Part 1 • Try sketching these objects using graph paper: 1. Base Plate 2. Shim 3. Sheet Metal Stamping (Day 2) 4. Inlaid Linoleum Block (Day 2)
Part 2:Orthographic Drawings • Also known as Three View Drawings or Multi-View Drawings
Parts of a Three View Drawing • Front View • It is a drawing of an object looking at it head on. • The front view is usually placed in the lower left corner of the drawing.
Top View • It is done looking down on the object and drawing a “bird’s eye view” of it. • The top view is placed directly above the front view.
Top View Front View
Right Side View • It is done by rotating the object and drawing the right side. • The right side view is placed on the right lower corner of the drawing.
Top View Side View Front View
Projection Lines • Projected from front and top views that gives the length and location of parts. • These lines are drawn very lightly.
Top View Front View Projection Lines Side View