AutoCAD 2010/2011/2012 DWG Format

[#1]

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?

[#2]

- 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..