Mirror and Union

Tutorial series: Introducing Shapr3D basics


← Back: Primary and secondary filletsNext: Measure precise volume →

What you'll learn

Complete the tank body using the Mirror, Transform, and Union tools and get introduced to the Measure tool to get a rough estimate of the volume of the tank. Next, you add and fillet a gas filler neck to the tank, simply selecting the feature to easily work with relevant steps in Design History.



Welcome to part five as we work towards finding the volume of the gas tank. Now let's mirror the tank. So we'll use the transform mirror and the tip says to select the items to mirror and then select the mirroring plane or item. The items to mirror will be the body and that will be the body. The mirroring plane or item


I can select this plane or this face. So in this case, I'm just going to select the plane. Shapr3D shows me the preview. I click done. Let's turn off those edge display again because it's getting distracting. I've got two bodies now, and I really want this to be a single body. Going to go to tools, union, select the two bodies.


and click done. Now there's a couple of things that have happened. You notice first of all, there's only a single body now. Second, the line that joined these two parts is gone because this face should be the same on both sides. So when the two sides are joined, the line goes away. And that's true all the way around the part. So we have now a single body. Here's another tool that we haven't used before. This is the measure tool.


The measure tool allows you to do point-to-point measurements. So we can select an edge and see how long that edge is or select multiple edges and see what the combined length is. We could also do point-to-point measurements. So we'd measure from here to here and the software gives us a linear distance. But you can also select...


an entire body and Shapr3D will give you some statistics for that body. And one is the surface area in case you need to paint something or coat it, you'll know how much surface area needs to be covered and a volume. In this case, we want to fill the tank with gas and so we have 781 cubic inches available for gas. And a little bit of research.


shows you that 231 cubic inches is equal to one gallon. So in this case we have a little bit over three gallons of gas that go into this tank minus of course the thickness of the tank. So that's what we're going to deal with next is shelling this out and of course we're going to have to put a gas filler neck on it. Let's see how to do that.


A gas filler neck is going to be a circular opening right in the top. How would we create that? One way would be to use a couple of extrusions or we could make a revolve much more easily. A gas filler neck isn't necessarily going to line up with the XYZ axes in the model. We might have to create some sort of a reference plane, but we could shorten that process.


by using a revolve. Let's go about it this way. I need to select a plane that will show up in the middle of the model. So I'm going to actually turn off this body in order to do this. I'll open a sketch on the left plane and I can turn the body back on so I can see it for reference. And now I can draw in a center line and just to keep our example of not being lined up with


the world coordinates. Let's make this a little bit off kilter. So we'll put this line in here at an angle and then we'll continue.


and we'll get a perpendicular line from that and a perpendicular line from this. And we'll keep getting perpendicular lines until we're down here inside the volume of the tank and it doesn't really matter because this is going to merge. All right, now we're going to put in some dimensions. This dimension will be the radius of the filler. So I'll make it two inches.


This lip is going to be a return in here and we'll make this 0.375. This distance doesn't really matter. So we'll just make it whatever it is. And well, let's add another distance in here, 0.5 and pull this line down slightly. Okay. Now we want to do create a revolve. So we'll exit the sketch. Tools.


Revolve or remember the shortcut V. We'll select this area and also, and then the axis we want to use is part of the sketch. And we'll just make this. So revolve the view so we can see what's going on.


and we'll click OK or Done. Now to find this feature in the history tree, since our tree is getting quite long, we can just select on the feature and it should pop up here in the tree. Now you'll notice that this has produced a second body, which really wasn't our intention, and the feature itself doesn't give an option to merge this result with the main body. So,


Let's go back to the Tools, Union.


Select body two and shift select body one.


Click Done and we should have again a single body. We can go ahead and add some fillets to this.


want to select this under edge and also select this top edge at the same time and we can pull these out to make a small radius value there. Make another fillet on this edge that can be a little bit bigger. From here I want to add another feature and this will be the shell feature.


faces to remove going to be this top face. Everything is going to be the same thickness. So I'll grab this and drag it out slightly and I'll key in point one. Thank you for watching part five and in part six we'll finally determine the full volume of gas that can go in this motorcycles gas tank. Thanks for watching.


Try it yourself

Motorcycle cover
Piston rod
Rod clamp
4 motorcycle wheel
Block casting


About the instructor


Matt Lombard is an independent product development professional, working in the field for 30 years. He has done a variety of work from plastics design and surfacing work to writing instructional and reference materials and writing about the engineering technology industry. Matt has also served as CAD Admin, PDM implementor, and engineering process consultant.

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