AutoCAD 2010/2011/2012

AutoCAD 2010/2011/2012

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Contributor
dulerong
Posts: 17
Registered: ‎05-13-2011
Message 1 of 5 (1,136 Views)

LOFT - Can't create 3D solid b/c of Splined surface

1136 Views, 4 Replies
06-17-2011 03:42 PM

Valve Pic1.png

As you can see, the nature of my model forbids me from making a 3D solid using LOFT.

 

The top surface is consisted of 3D polyline and arc, which if "joined" will be become a spline.

 

The bottom surface can easily be joined into polyline.

 

If I loft the top and bottom, it'll only give me a LOFTED Surface, which is not I want (wanted a 3D solid)

 

Any suggestIon?

Active Member
b_a_osman
Posts: 6
Registered: ‎06-08-2011
Message 2 of 5 (1,093 Views)

Re: LOFT - Can't create 3D solid b/c of Splined surface

06-18-2011 08:35 AM in reply to: dulerong

- draw the full circle of the lower curve and the upper curve ..

- loft the two circles with no guidelines or pathes ..

- delete the upper face for the last created solid .. that will give u a cone ..

- slice the cone using the center rectangle part of ur top 3d polyline as a slice plan ..keep the lower part ..

- slice it again using the two side guidelines as a plan..

this will eventually give u how the curve should look like if the 3d polyline is planner ..

- draw a closed polyline connecting the center rectangle and the two mirrored curved we produced earlier ..

loft the last polyline with the original lower polyline using the six guidecurves u have .. ( don't forget to extrend the straight guidelines to reach the new polyline)

- this will give u the 3d solid u need .. all what's left is to go to front vies and ucs .. thin trim the unwanted solids with slice or subtract using a new shape (that will b better cause slice may split some faces)..

am sorry i couldn't attach the 3d solid i already modeled at work .. couldn't log-in from there ..

have a goodday..

Active Member
b_a_osman
Posts: 6
Registered: ‎06-08-2011
Message 3 of 5 (1,081 Views)

Re: LOFT - Can't create 3D solid b/c of Splined surface

06-19-2011 01:50 AM in reply to: dulerong
 
New Member
yussuf87
Posts: 1
Registered: ‎11-21-2013
Message 4 of 5 (397 Views)

Re: LOFT - Can't create 3D solid b/c of Splined surface

11-21-2013 12:08 AM in reply to: dulerong

your spline has 3d coordinates(not flat). The polyline is flat so there is nothing wrong with it. Whenever you try to loft using curved surfaces/closed lines, you will only get a surface. Try to flatten the top spline and you will see that you can create a solid.

Member
AlexanderSchmidtObermoller
Posts: 3
Registered: ‎11-03-2012
Message 5 of 5 (72 Views)

Re: LOFT - Can't create 3D solid b/c of Splined surface

09-04-2014 11:24 AM in reply to: b_a_osman
SO, what was the trick?
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