chapter 11 1.correct woodshop map 2.homework check 3.drafting (workbook p. 177) 4.projections...
TRANSCRIPT
Chapter 11
1. Correct Woodshop Map
2. Homework Check
3. Drafting (Workbook p. 177)
4. Projections (Workbook p. 181)
Workbook p. 177Textbook p. 337
Definitions
Technical Drawings are used…
…in technology to communicate information about an object or a system.
Basic lines used in drafting are…
…lines whose appearance and meaning are determined by international agreements.
p. 338
Geometric lines are…
• Are figures that are composed according to the rules of geometry, the art of drafting lines and curves with a ruler and a compass.
A sketch…
• Is a freehand drawing that respects, as much as possible, the conventions of drafting.
Basic Lines
Example Name Thickness Meaning
Visible Line ThickIndicates
the visible outlines of an object.
Hidden Line
Example Name Thickness Meaning
- - - - - - Hidden Line
Broken Line
Indicates the
outlines that are
not visible in the
current view
Hidden Line
Example Name Thickness Meaning
Construction line
FineUsed in
preliminary sketches.
Hidden Line
Example Name Thickness Meaning
____ _ ____ Centre lineSmall
dash in centre.
Indicates the centre of a circle.
Hidden Line
Example Name Thickness Meaning
Cutting plane line
Includes arrow
heads at each end.
Indicates the
placement of an
imaginary cut.
Hidden Line
Example Name Thickness Meaning
Dimension line
Includes arrow
heads at each end.
Indicates the length
of an object.
2.75
Hidden Line
Example Name Thickness Meaning
Extension line.
FineIndicates the boundaries of
a measurement.
Hidden Line
Example Name Thickness Meaning
////// HatchingSlanted,Equally spaced.
Indicates the surface where an imaginary
cut has produced a
sectional view.
Hidden Line
Example Name Thickness Meaning
Leader line.
Has an angle of 30, 45 or
60 degrees.
Ties a dimension
to a particular feature.
Hidden Line
Homeworkpp. 177-180
Creating Figures Using Geometric Lines
• Goal: To practice techniques for creating various types of geometric lines by constructing and reproducing figures
Order of Operations
1. Get a handout
2. Get drafting tools
3. Complete figure A together as a class
4. Complete figure B individually
Drafting Tools• SHARP pencil• Ruler• Drafting Paper• Square• Protractor
Figure A
Follow steps # 1-8
Step # 1
Step # 2
Step # 3
Step # 4
Step # 5
Step # 6
Step # 7
Step # 8
Figure B
Reproduce 1:1