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CSG Modeling Approach in FreeCAD Part Workbench | FreeCAD Tutorial | 3D Modeling | Mechnexus |
May 14, 2025
#freecad #freecadtutorial #learnFreeAD In this video I have explained CSG Modeling Approach in FreeCAD Part Workbench . ▶️ Get my Complete FreeCAD Course : From Zero to Expert ! https://ko-fi.com/s/1ab4385434 ▶️ Join my channel membership and keep supporting my work: https://www.youtube.com/channel/UCcn6z2whMaFu-_LDsEXCfVA/join ▶️ Visit my website for more info on FreeCAD-: https://mechnexus.com/ ▶️ Download Source File of Tutorial-: https://mechnexus.com/mechnexus-youtube-tutorial-source-file/ ▶️ Buy Me a Coffee I am very grateful that you watch my videos and I am constantly trying to improve the quality of the videos on this channel. If you'd like to help me do this, please consider supporting me so that I can to continue to produce content for your enjoyment. 👉 Help support this channel by buying me a coffee: https://ko-fi.com/mechnexus
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0:00
hello friends welcome to free tutorial
0:02
and in this tutorial we will talk about
0:05
constructive solid geometry in freead
0:08
and uh how constructive solid geometry
0:12
used in a part
0:15
workbench and before directly going to
0:18
understand the constructive solid
0:20
geometry first we will understand the
0:23
geometric model kernel if you want to
0:26
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my Kofi course page link on uh pin
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comments and uh video
3:19
descriptions so basically a geometric
3:22
modeling kernel is a solid modeling
3:25
software component used in a computer
3:28
edited design means in CAD
3:31
softwares so you have heard about the so
3:35
many CAD softares like uh solid works
3:38
Katya
3:40
Unigraphics
3:41
Creo so how this CAD softares works so
3:45
core of the every software is a
3:47
geometric modeling kernel here we can
3:49
see that ACIS is developed by Dissol
3:52
system parasolid is built by
3:56
Simmons
3:57
and PTC have developed the
4:01
granite and here in a list we can see
4:08
here open cascade which is an an
4:11
open-source modeling kernel and our free
4:16
software is uh powered by this open
4:20
cascade so let's
4:23
uh see the open cascade Wikipedia page
4:27
so this is the open source and uh here
4:32
you can see the release date of uh open
4:35
cascade and
4:37
now come to our
4:43
point which is a constructive solid
4:45
geometry it is a modeling paradigm that
4:49
is used in many CAD
4:52
systems almost any software which is an
4:56
open source is a powered by
4:59
the open cascade in many cases whereas
5:04
in paid softares like solid works
5:07
inventor they use the
5:10
softwares from here for example uh
5:14
this semens build the parasolid and this
5:17
parasolid is used by the many companies
5:20
and desols having their own modeling
5:25
kernels if you look at the list there
5:28
are the few kernels which are the very
5:31
known in the market but our main focus
5:33
is open cascade and here what is
5:38
constructive solid geometry we have
5:40
known the kernel and how this kernel is
5:43
useful in a CSG so
5:47
basically constructive solid geometry is
5:50
a primitive solid objects where we model
5:53
the part with the help of a boolean
5:55
operations so here we have the modeling
5:59
kernels and here we perform the boolean
6:01
operation boolean operation basically is
6:04
a addition and subtractions of a part so
6:08
we can see here this uh three cylinders
6:11
are the combined together to make a
6:13
single body so here we have did the
6:16
addition of a part and here we have
6:19
combined this cube and this round and we
6:24
have achieved the shape with the help of
6:26
addition and subtractions after that
6:29
this body and this body got added and
6:34
after the additions this body got
6:36
subtracted from this and we have
6:39
achieved this
6:40
part so this is how we use
6:44
the we use the primitive objects
6:48
primitive objects is nothing but if you
6:50
go to the free CAD and we activate the
6:52
part workbench so primitive objects are
6:55
the cube cylinder
6:59
round these are the primitive
7:01
objects and we will see the practical
7:04
example of this and here is a beautiful
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uh graph is given or we can say the
7:13
diagram
7:14
where we can see that we create a sketch
7:17
then we extrude it create a solid or we
7:20
create a solid
7:22
directly and then we perform the
7:25
operations like a union cut again union
7:29
again cut and here we achieve our final
7:32
objects so to understand uh this boolean
7:35
operation we will do one live example in
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a part design workbench with the help of
7:41
a constructive solid geometry we will
7:44
use the primitive solid objects and we
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will perform the boolean operations so
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in constructive solid geometry we have
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to focus on these two things use the
7:55
primitive objects and use the boolean
7:57
operations and rest of the things in
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background is handled by the our
8:03
modeling
8:05
kernel so now let's uh come to our
8:09
frecad and here I will simply click on
8:13
the cube so I will go to the model tab
8:16
and if I select this cube then I get its
8:21
property like how much length height and
8:24
width so here is a 10 mm by 10 mm by 10
8:26
mm now let's uh give the length
8:31
100 width 50 and let's give the
8:36
thickness of 5 mm so you can see that by
8:39
just changing the value I have converted
8:42
the cube into the plate now let's
8:47
consider we wanted to create a hole on
8:50
this plate but we will do it with a
8:54
primitive solids so create a hole we
8:56
will insert a cylinder so you can see
8:59
that once cylinder is inserted here and
9:01
now if I click on the cylinder I get it
9:04
property so let's see uh I wanted to
9:07
give the diameter five so I will give
9:10
the radius 2.5
9:15
and uh
9:17
height let's give the
9:21
20 it doesn't matter because we will
9:23
move it and we will perform the boolean
9:26
operations and
9:28
now here is the interesting thing is
9:31
that it's a placement property so it is
9:35
placed on 0 0 so let's see if I click on
9:38
the top view and here is our UCS you can
9:41
see that in y directions let's in y
9:45
directions I want the position of the
9:47
cylinder uh to the 30 mm so you can see
9:51
that is move to the 30 and uh I wanted
9:54
to make it
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20 or uh let's make it
9:59
15 and in x directions I will give it a
10:06
15 so you can see that my cylinder has
10:10
moved with the respect to the X Y and Z
10:14
value so in Z I wanted to cut it so in Z
10:20
directions I will move it to the
10:24
down so we have fixed the position of
10:27
our cylinder and now we perform the
10:29
boolean operations so in boolean
10:31
operation selection of order is very
10:34
important we wanted to subtract this
10:37
cylinder from this plates so first we
10:39
will select the plate and press the
10:42
control key and we will select the
10:45
cylinder and now we will get the boolean
10:48
operations tools here so this is the
10:51
union this is the intersection and this
10:53
is the cut so we will perform the cut
10:56
operations and click on the cut so you
10:59
can see that uh cylinder is subtracted
11:03
from this plate
11:06
and we have created the hole and now
11:11
let's on this cylinder we can on it and
11:14
let's change the property for
11:17
example I wanted to increase the
11:21
hold let's I make it five so you can see
11:24
that
11:25
uh it has been updated
11:31
and if I wanted to change the
11:34
positions then I can simply go here and
11:38
change the
11:45
positions on it
11:58
click on the cylinder and
12:00
here we can change the position for
12:03
example I move it here and you can see
12:05
that as I move my cylinder my hole is
12:08
also shifting because of the parametric
12:11
nature of our
12:14
frecad now if I come out of it then my
12:17
hole is also moving so this is how we
12:20
can create the features and this is just
12:23
basic understanding to understand the
12:25
boolean operations in freead and we will
12:28
do the modeling then you will have the
12:30
better understandings of a free part
12:34
workbench now let's uh delete
12:37
it and what if I wanted to combine
12:43
it this uh cylinder and this plate a
12:47
single body so I will select the plate
12:51
and cylinder and here I will perform the
12:55
union tool so now this cylinder and this
12:59
got merged but you are seeing the edges
13:02
here so what I will do so I will go to
13:04
the my fusion which is a union and here
13:08
is a refine is a false so I will set it
13:10
true now it got merged now it is a
13:14
single body let's delete
13:20
it and delete this
13:22
cylinder let's I wanted to combine two
13:27
plates so what I will do I will select
13:29
my cube go to the edit and click on the
13:32
copy and again go to the edit and click
13:35
on the paste so now here we have the two
13:38
plates and our plate thickness is of uh
13:43
5 mm so I will select it go to the
13:46
placement and in position in Z
13:53
direction I will give the 5 mm
13:57
now we have the two plates now we will
14:00
combine it and make it a single plate so
14:03
for this we will select these two plates
14:06
and click on the union so it is got
14:10
merge but you might think that if it is
14:13
combine then there is a parting line is
14:15
there so for this we will go to the
14:18
fusion refine is false we will set it
14:21
true so now you can see that these two
14:24
plates are got merged
14:27
so this is how boolean operation is work
14:31
and here is the
14:33
intersections let's I wanted
14:36
to insert a cylinder i have inserted it
14:40
now I want to intersection portion if I
14:43
want it so I will select my fusion and
14:45
select cylinder and click on the
14:48
intersections so I will only get the
14:50
intersections body so this is how to use
14:55
the boolean operations with the
14:58
primitive solids in free to model the
15:01
part so this is all
15:05
about how to use
15:08
the part modeling in part workbench with
15:11
the help of uh constructive solid
15:14
geometry in frecad i hope you have got
15:17
the basic idea of the part workbench and
15:20
when we will do some modelings
15:23
mechanical part modeling with the help
15:25
of a part workbench then you will have
15:27
the better understanding of the other
15:30
tools in a part workbench of a freat so
15:34
this is all about this tutorial thank
15:36
you for watching and thank you for your
15:38
valuable
15:41
time
15:44
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