Engineering design
W4-2
Professor: Oscar Alonso Rosete Beas
Previous session
-
Circles
-
Portfolio drafts (6,7)
Agenda
- Drawing terminology
-
Portfolio revision on Wednesday(1-7)
- Study guide will be presented
- Exam Monday, February 17
- Portfolio draft (7,8)
Laboratory sessions
CAT´S LAB A
First activity
Second activity
Third activity
Portfolio draft (4)
Portfolio draft (5)
1
2
3
4
5
6
7
8
title block
Portfolio draft (6)
Portfolio draft (7)
Units expressed in inches
square
Terminology
Tangents
Straight or curved lines are tangent to a circle or arc when the
line touches the circle or arc at only one point.
Section 1
Title block
A line tangent to a circle. The point of tangency is found by constructing a line from the center of the circle 90° to the tangent line.
A line tangent to an arc. The point of tangency is found by constructing a line from the center of the arc 90° to thetangent line.
Terminology
Tangents
Straight or curved lines are tangent to a circle or arc when the
line touches the circle or arc at only one point.
Title block
Two tangent circles. A line drawn between the circles centers establishes the point of tangency where the line intersects the circles.
A common application in an engineering drawing where an arc is drawn to form a radius 90° corner
Tangent to two circles
- Given two circles with centers marked C1 and C2, draw a vertical line that touch the circumference and the center.
- Connect them from the points that touch the circumference on the circles.
Points of tangency
Points of tangency
Portfolio draft (8)
Portfolio draft (8)
Activity description:
Same proccedure seen on porttfolio draft 7
Title block:
- Title: Pivot arm
Section 1:
Draw the metallic plate as seen on the following image
Notes:
- Make the draft multiplying quantities by 2.
- Units expressed in cm
- Left circle is 3 inches from the left of the centerpoint and vertically centered.
Portfolio draft (8b)
Activity description:
Same proccedure seen on porttfolio draft 7
Title block:
- Title: metallic plate (2)
Section 1:
Draw the metallic plate as seen on the following image
Section 1
Title block
