3d Extended 90 degrees pipe

[cssltd]

Hi

I am trying to draw an extended right angle pipe to go onto my 3d pump. I am struggling on how to go about drawing this and any help would be greatly appreciated.

I know all the dimensions for the drawing but i cant seem to get it on the bend.

Thanks for any help you can give!

[ReMark]

One possible way using 2006 would be to draw the centerline of the pipe then extrude a circle representing the O.D. of the pipe along it.

[Hugh_Compton]

ReMarks comment about the fitting is fine. The harder part about drawing pipework in 3D is the pipe runs themselves. These can be drawn using 3D Polylines so that they can bend in any direction.

 

To make your 3D Poly line have curves simply click on the Polyline then, in properties (under fit/smooth), select cubic. If you need the pipe run to have "tighter"/smaller radii then select quadratic (but bear in mind that quadratic uses a LOT more memory so in large drawings it is best to be avoided.

 

If you have a choice between using sweep and extrude then I recommend going for the extrude option because the resulting pipe run will again be less memory intensive.

 

The problem with the 3D polyline method is that the radii aren't exact. If you needed the run to represent an ANSI steel run then your path wouldn't match your fittings (this might be acceptable for you). You will also run into problems if you wanted to do a BOM/parts list (much simpler when using singular pipe fittings).

 

If you truly need to define pipe runs by their paths without having to manually insert the pipe fittings then you would need a program such as AutoCAD MEP.

 

If you would be happy with individual pipe fittings then try one of these:

 

3D AutoCAD Pipework – http://www.HerculeDesign.comPipework & Structural Steel - http://www.3DCADMax.com

[ReMark]

Did 2006 have the SWEEP option? I'm thinking that it did not.

[shift1313]

nope it did not. If he wants a solid extrude>path is his best option.

[ReMark]

Hugh: Correct me if I am wrong but I thought that 3D polyline objects can not be filleted. If I'm drawing the centerline of a piperun with 90 deg elbows how can this be accomplished using 3D polylines?

[ReMark]

cssltd:

 

The image on the left below depicts a centerline of a piperun, created with a polyline, for a 3" diameter pipe and a long radius elbow. The circle representing our pipe is extruded along this centerline using the "path" option of the extrude command. The result is depicted to the right.

 

[ReMark]

Hugh: Thanks for pointing out that "If you have a choice between using sweep and extrude then I recommend going for the extrude option because the resulting pipe run will again be less memory intensive." Just for laughs I created the above geometry using both extrude and sweep. The file sizes were 45KB for extrude and 118KB for sweep (2.62X larger file size). Interesting.

[JD Mather]

Given the choice between Sweep and Extude for this application I would almost always choose Sweep as there is no need to align pipe profiles in advance. An entire library of commonly used profiles can be created and then simply select the paths for Sweep. Disk space is cheap. My time isn't. http://home.pct.edu/~jmather/content/CAD238/AutoCAD%202007%20Tutorial%208.pdf

[shift1313]

cssltd:

 

The image on the left below depicts a centerline of a piperun, created with a polyline, for a 3" diameter pipe and a long radius elbow. The circle representing our pipe is extruded along this centerline using the "path" option of the extrude command. The result is depicted to the right.

 

[ATTACH]11421[/ATTACH]

 

 

also to build off that if you draw your ID and OD as regions, subtract them you can extrude the profile of your pipe or you can use the SolidEdit>Body>Shell command.

 

If you are extruding along a path your cross section and path dont need to be in the same place but the extrude will exit your cross section and not align with your path.

[cssltd]

Thanks everone thats great but ReMark can i just ask you, when im using the ext command im not able to do this round the bend i have created could you tell me what i am doing wrong? thankyou

[cssltd]

its ok i managed to get it!

Thanks again!

[ReMark]

I'm glad to hear you figured it out. What method did you use?

[joemaddigotz]

Okay so here is my deal -

I don't think anyone is going ot be able to figure this out and if they do I would be most happy.

 

I am drawing a polyline to create a .5 bar - the bar starts out 11.5" on top - bends down to 4.25 then bends back in 6" and at the very end *here is the tricky part that I am stuck out" this is bent OUT 1"

 

When I create the polyline I have to switch the view to continue drawing this up on the "Z axis" I think? If someone knows what I am trying to accompllish I would be much obliged to some help.

 

For quick example I see the 90 degree photo for the extrude now take one end and bring it up about 1" - how is this done??

Thanks in advance - Joe

 

 

[kencaz]

When I create the polyline I have to switch the view to continue drawing this up on the "Z axis" I think? If someone knows what I am trying to accompllish I would be much obliged to some help.

 

For quick example I see the 90 degree photo for the extrude now take one end and bring it up about 1" - how is this done??

Thanks in advance - Joe

 

You could use a 2d Polyline and extrude your last section separately, and rotate it on the X axis 90deg up.

 

 

That's only one of many way's to do it...

 

KC

[joemaddigotz]

Wow, Kencaz -Thank you so much - I am going to try this right now - You're the man!

 

Thank you for the help..

[joemaddigotz]

How were you able to re-connect the separate extrusion? I am having a little trouble with this still.

[joemaddigotz]

I created the polyline for the longer set of pipe, created my .5 fillet, drew my .5" circle, made my extrusion on it.

 

I then created the 1.5" polyline for the end that I would rotate did all the above but they are now seperate and not lining up correctly.

 

I appreciate your help - thank you again in advance -

[joemaddigotz]

Alright, as slow as a beginner I may be - I was able to figure out how to make them line up and fillet correctly - everything is beautiful however, Now I need to learn how to rotate this object in the upright position...

[ReMark]

Just make sure your UCS is in the proper orientation (X to the right, Y pointing up) and use the normal ROTATE command.