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Hi everybody; I'm Michele Cammisa
and in this "Tips&Tricks" video tutorial
I'm going to show you a simple application
of Free Form Modeling
in particular for a decorative
wrought iron element
This object is quite common
and it's useful for this kind of design
also because
its structure
that looks complex
could be simply obtained by
intersecting surfaces
So let's go!
Open a new document
we have to make first at all
a spline to define the spindle geometry
and then it intersects
an helicoid
In order to build such spline
it's useful to get a grid on which
we place its control points.
Now we have to assign the dimensions.
For our purpose, it's good to choose
15 cm about in vertical
Thanks to the quote features,
I'm quickly able to manage
before the orizontal dimension
then the vertical one
I proceed by simmetry
So let's define the spline geometry
By the spline command
I put the control points on the grid lines
and so on also on the opposite side
Now the spline must be defined
by the quotes
So I proceed
The last adjustments
are directly on the geometry
select the upper end spline handle (arrow)
and add a vertical relation
Repeat the procedure
for the lower end spline handle
Now the entire geometry is fixed
so I can manage the definition
of the revolution surface.
At this point
I realize that it's better to modify the dimension
I proceed
5 mm
11
35
and now it seems more shapely
Well!
Now I design the helicoid that
must be intersected with the spindle
so I take a plane
and built up the vertical development axis
Outside
from the vertical plan
we take the orizontal line by which
the elicoide then appears
our profile will be the horizontal segment
our path will be the vertical segment
Now
I don't choose standard condition
but the winding around the axis
I don't choose the degrees
but the laps
1 lap stands for 360 degrees
let's proceed
now I have only
to choose from the sketch tool menĂ¹
the curve intersection
Here is a 3D sketch
of the entire geometry
Then I choose
the starting plane
and the upper one
I sketch the section of the curly element
I suppose it is
a rectangular section
or a square one
3 mm
and build it
by a solid sweep
so wrapping our section
along the curly path
It's possible to fix the colour now
or make it later
Anyway everything it's done
because I have to make a simple pattern
circular
around the axis
7 repetitions
better 8
the element is finished!
Now I can proceed
with minor adjustments
but they're simple parametric scalings
on the model.
Like always
I hope all of this coud be useful for you
Thank you for your attention and see you soon!