Autocad Model

SoSolid · 22 Jan 2007 at 14:18

I have to draw an Autocad model for part of some uni coursework. It has to be complicated enough such that it requires a section view, in addition to the third angle view. I just cannot think of any ideas as to what I should draw. It has to be complicated or else there is no chance of getting a good mark, however, I am a beginner in autocad so I cannot do something that is too difficult. Basically I am pleading to anyone who can suggest a few good ideas of something that I represent as an autocad 3D model using the third angle projection view. :confused:

Col_M · 22 Jan 2007 at 14:27

When i was at uni i did a compact bycicle pump in AutoCAD, including all the springs, seals and built in pressure gauge. Just about the right balance of simple but with enough parts/complexity

Here's a transparent pic to show you what i mean

SoSolid · 22 Jan 2007 at 14:30

Sounds like a good idea but how did u draw all the springs etc?

AJUK · 22 Jan 2007 at 14:33

Third Angle projection isn't a 3D model.

http://www.technologystudent.com/designpro/ortho2.htm

SoSolid · 22 Jan 2007 at 14:37

AJUK said:
Third Angle projection isn't a 3D model.

http://www.technologystudent.com/designpro/ortho2.htm

Sorry, I meant that it has to be a third angle projection and also a seperate page showing the complete 3D model.

Raymond Lin · 22 Jan 2007 at 14:40

just draw a 3 story building with steel frame, plumbing, electric, tiles, windows...etc plenty of drawings in architectual journals. Your blueprints right there.

Col_M · 22 Jan 2007 at 14:47

SoSolid said:
Sounds like a good idea but how did u draw all the springs etc?

LOL it was a good few years ago now and i haven't used AutoCAD since but i think you set the view to the plane that would be a cross section along the length of the spring (x axis goes along the length of the spring, y axis is the diameter of the spring).
Draw a circle (diameter of the spring wire) above and below the centreline of the spring, you want to create at the pitch you want (x axis setting the pitch and y axis being the raduis of the spring).
Draw an arc from the centrpoint of the circle to the other, then extrude one of the circles along this arc, copy and rotate the solid object 180 degrees around the x axis. Snap the centrepoint of one side of the spring to the otherside of the spring and combine them as one solid object.
Now you will have a doughnut shape that has been cut across and the 2 faces of the cut have been sheared apart, one rotation of the spring if you will, copy and transform to give you the length of spring you want, then combine all the parts to make the spring one solid object.

That is all as far as i can remember and i know it isn't a good description but without showing you it's the best i can do :rolleyes:

Col_M · 22 Jan 2007 at 14:48

AJUK said:
Third Angle projection isn't a 3D model.

http://www.technologystudent.com/designpro/ortho2.htm

yes but if you create a solid model then making a cross sectional diagrams for ortho projections is easy.

AJUK · 22 Jan 2007 at 15:02

I agree, but is that the question?

SoSolid, can you post the actual question? (not that we will do your homework for you

)

jumpy · 22 Jan 2007 at 16:33

For our city & guilds 3d CAD course we had to draw a fluorescent marker pen and cut a section from the cap so you could see the nib - displayed in plan, elevation front, elevation side, and a view in 'perspective'.

Other stuff I've drawn in my own time - grooved & drilled/vented break disk and a pc fan - it was fairly close as far as dimensions were concerned but certain parts have no actual width as I didn't want to destroy a perfectly good cooling fan

:

We never draw anything even half as interesting as that at work...