lec9
Lecture 9: Section View II ENGR 0101
Engineering Graphics
Spring 2019
Final Exam
May 12
120 Minutes
5 short question (Multiple choice, dimension and autoCAD problems)
1 Multi-view drawing
1 3D Isometric drawing
2 section view drawing
1 extra credit
Section View - review
Section View - review
Section View - review
Section View - review
Section View - review
Section View - review
Section View - review
Section View - review
Section View
Section View
Section View
u 1) draw the outline of the cut section
Section View
Section View
u 1) draw the outline of the cut section
u 2)every line your cutline touch, there’s something happen
Section View
Section View
Section View
1 2 3
4
5 6
7
5
8
Section View
u 1) draw the outline of the cut section
u 2)every line your cutline touch, there’s something happen
u 3)measure how the line move up/down once it touch those line
Section View
1
Section View
1
In a circular object, event can be moved throught its Circumference
Section View
Section View
1
In the new event 1 location, draw a line to the top view, and as you can see, it is 3 unit depth.
Section View
1
Therefore, the first event goes 3 unit
Section View
2
In event 2, it goes 2 unit, but it is going back
Section View
3
In event 3, it goes 1.5 unit
Section View
4
In event 4, it goes 2.5 unit back
Section View
5
In event 5, it goes 2.5 unit
Section View
6
In event 6, it goes 1.5 unit
Section View
7
In event 7, it goes 2 unit
Section View
8
In event 8, it goes 3 unit
Section View
u 1) draw the outline of the cut section
u 2)track every line your cutline touch, there’s an event happen
u 3)measure how the line move up/down once it touch those line
u Hatch the solid areas
Section View
Section View
Section View It didn’t has arrow here, so you only need to draw half of the object
Section View There is 5 events here
1 2 3
4 5
Section View In event 1, you goes through its Circumference. And then draw a straight line to the top view, and you know it is 2 unit
Section View Next, goes to event 2
Section View In event 2, the Circumference didn’t really help because its center of circle is not in the center of the object
Section View However, the small circle in event 2 are similar to the small in the side. Therefore, we can use the side circle as new event 2
Section View Draw a straight line to top view, it is 2 units
Section View 2 unit in event 2
Section View Next, goes to event 3
Section View Event 3 goes 4 units
Section View Next, goes to event 4. However, event 4 is a hidden line.
Section View If an event meets a hidden line, Your section view’s line need to be discontinuous.
Section View In event 4, it goes 1.5 units from very back
Section View 1.5 units from very back
Section View Next, goes to event 5. Since event 4 is break, now it needs both event 3 and 4 go to event 5
Section View Event 5 goes 2.5 back
Section View goes 2.5 back
Section View goes 2.5 back
Section View close the boundary
Section View Finally, define where is the empty area,and where is solid area
Section View Therefore, event 2 to 3. And event 4 to 5 are empty area
empty
empty
Section View Hatch the solid area
Section View - practice
Homework
homework