3D Model 3-Stone Engagement Ring in Rhino 6: Jewelry CAD Design Tutorial #69


Hello everyone welcome back to PJ Chen
Design. Today we gonna look into how to model this three stone ring, and what you
need to pay attention on the structure. Are you ready? Let’s get started! To start this ring, you need to have the
exactly stone size that you are going to set into the ring, and position the angle
that you like first. If you like to know how to build a stone, I have a video here
that can show you step-by-step process. You can check out the video, I will have
a link in the description below. First of all, I would like to set it up my ring
size. In this case, I’m going to set it a diameter for 16 millimeters. We are going
to pipe our prong later on, but I want to have a guideline here. In my case, I’m
going to have a prong size 1.2 mm in diameter. So I’m going
to offset my circle for 0.6 mm. That way, when I’m drawing
any of the line, I want to make sure it’s not passing with this circle there.
so Let’s starting with the arc. I’m going to have this somewhere over here.
We can have a prong a little bit longer, so that will be good for the stone
setting, and I want to make sure my “near” is on, on my Osnap so that will snap
over there. That will be my first line. If I’m looking at my right view, I wanted to
have a line go from roughly the same height and then it’s coming over, and
coming to the center roughly something like this, and then, this might snapping
somewhere that you don’t want, and we can do “ProjectToCplane”, and we want
to delete the input=yes, so this one will be flat, and let’s take a look
on what we have. The line that we are going to create. we are going to use the
command call “Curve from 2 Views”, and we’re gonna have this curve and this
curve, so you’re automatically create this curve over there. Let’s do a test.
Let’s pipe this curve, and see what happened. We’re gonna use the pipe and
then the radius is 0.6 over here, and 0.6 on the other end. Notice
that it’s just right at where my ring size is. It’s not past that ring size.
That is what that reference line for. okay so this is the first that I have
you want to check, if it is too close to the stone, like the one that I have on
the left, but not touching the stone, like the one I have on the right, okay so if
that is the case, instead of a do it again and changing all the time, what we
can do is we can rebuild this guy to be less control points. and then we
want to pipe it one more time. This time we want to record the history, and we
pipe it over there, so if that is too close, we canselect our curve and we can turn on the control points. and we can move it around.
so it is not too close to the stone, so that way allow you to do some editing,
and for example, if this is not close enough, we can have a movie in. I always
like to have my prong at exactly where that 45-degree angle. It will look much nicer,
so you can to get into the way that you like. I might need to have this point
going down, because it’s touching a stone it doesn’t look too good on the side
view, so you will spend some time to tweak it until you find the best curve
for the stone there. then let’s do a test to mirror on the other side, and see how
it goes. The first one will look something like this, and I’m going to
temporary to hide those two. The second one that we are going to do, it’s gonna
go from here, and again, we want to go a little bit higher, and we’re gonna come
over here, and make it into something like this, and blend it to the inside of
a ring shank, and again you can adjust to whatever that looks good to you. So after that, we are going to looking at
our right view again. On my right view, I’m going to draw
another curve. This curve is going to go from there and end this somewhere here.
so this will be the curve that I’m going to use for the smaller stone.
Let’s use the “Curve From 2 Views”. e’re gonna have this curve and this curve. So
now we are getting this curve right here. In order for you to blend really
well, I’m actually need to have the somewhere
blended from this point to this point. so we’re gonna use the “split” command. We
want to split with the point somewhere about here, and this one somewhere with
the point somewhere about here. So let’s delete this one, and delete the bottom, so
now we have that opening over there.We can use the blend tool to blend the
curve from here to here. Alright so that looks alright to me, I’m going to select
all of them join them and also rebuild into ten point. Let’s do a test
with the pipe the same diameter I’m going to have, and see if that go well.
now that’s turned on what we had before. and see if that is a good match there.
It looks nice over there, then I’m going to have this one, and mirror to
the other side. So let’s double check and see if everything is alright,
and again this might be too long you might want it to be shorter, longer
whatsoever. I’m not gonna spend time and tweaking it. For the demonstration
purpose here, I would like to show you what to do next.
So we are going to go mirror to the other side, and then we will have the
setting part is almost done. okay now the second part that I need to
do is about re-shank. We’re going to have this shank. It’s going to start it somewhere a little bit inside of my prong, and it’s
coming over here, and coming over here. Okay,
so again if that doesn’t look too good to you, you can always adjust it. Alright,
so that is that, and I’m going to creating a area that we can set the
stone later, so let’s go ahead to creating the profile. For the profile, I
always like to use the conic corner, and because it will give me a very nice
cushion looking because he will give me a really nice cushion looking shape
there, and let me move this one from the midpoint to the quadrant of our inside
of a ring shank, and then you can adjust the thickness, if you like to. I may also
want to make it a little bit thicker there okay. I have a cross-section
over there, I’m going to mirror to the other side, and let’s use the Sweep1.
This is our rail. This is going to be cross section, and cross section I always
like to have my seam inside of a ring shank. We have the bottom
ring shank. If you want to have bottom little bit thinner, you can create
another profile there on the bottom. Let’s take a look right at
the front view. We have this over there. I’m gonna make a copy, and want to rotate
it into the angle is 90 degree with the rail that is going to, and then we’re
gonna take a look on this view. I want to make sure it’s touching the prong. I also
want to make sure it’s a little bit thin there. So let’s starting with
sweep 1 rail, and make sure you turn on a history. This is the rail. This is the
cross section and we always want to make sure the seam is inside of a ring shank.
Okay so let’s take a look on this one. if that doesn’t look good to you. We’re
going to pick up the curve and then we can move those points in and out, up and
down, to get the best curve to fit into a design. So you can go
ahead and tweak it until you like it. Once you like everything. Let’s go ahead to cap it, and of course we want to have a rounded
edges, so we will go ahead to fillet the edges, say 0.3 millimeter. If you
like it, let’s go ahead to mirror to the other side. If that inside doesn’t look
nice to you, you can go ahead to use a sweep instead of piping. So
there’s a lot of things that you can tweak over there. Now let’s talk about
the structure I’m going to turn the stone off, and let’s take a look on that.
Those are nice .They are touching so that will be fine on the
casting. Those two are touching with this red one, so they are fine with the
structure. However, I am facing the issue if something is hitting on this
direction. It may crash to the other prongs. So we do actually need some structure in
the middle to hold it. So this is what I will do. I will go to the top view,
and I’m going to use the arc starting here roughly here, and then we want
to get arc there. So this is the curve that we
have there. Let’s bringing up to where the location should be, and where’s that
location should be. It should be under the girdle area and we can move in a
little bit. Let me turn this stone off one more time, so now we have
this one here, we can go ahead to pipe it. The pipe we’re going to use like
0.4 millimeter there, so this way it’s giving you the structure that is
going to hold on this side, so you won’t get crash or the stone will hold it
better. We will just need to mirror to the other side.
and we’ll do the same on those two. So the proportion may not look
100% correct yet, is because I want to show you something really quick, but you
get the idea and feel free to let me know how you’re doing, if you want to
know more about a stone setting don’t forget to check out my course on my
website for the stone setting, so when they finish is you have a nice
proportion and the right prong size and something similar like this. I hope you
enjoy please like and share and comment on my video that helped me to reach more
people who want to learn Rhinio thank you and I’ll see you next.

15 Replies to “3D Model 3-Stone Engagement Ring in Rhino 6: Jewelry CAD Design Tutorial #69”

  1. Very helpful video PJ! I have RhinoGold but I really want to do it with Rhino itself. These videos are great!

  2. Hi PJ, I have 6 years experience with 3Design CAD and Zbrush, I want to bridge over to Rhino to increase my knowledge of all things Jewellery CAD. Do you have a video on CADing with cushion and emerald cut stones?

  3. sir Thank you very much sir you are very easy and simple language teaching sir very helpful your all series sir

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