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Rounding or beveling of sharp corners is used extensively in part design. And SolidWorks has provided an easy way, an interface, for applying either one. Rounding is called fillets, and beveling is called chamfers. The most basic type of fillet is called the edge fillet, and is created by selecting one or more edges, and choosing the desired radius. First example I want to look at, is notice I have this Sketch7 here. If I click on that sketch, if I want to extrude this thing out here, and I want it to have rounded corners on the edges. What I could do is go back to the sketch here, click on Edit Sketch, look Normal to the sketch.
Come up here to Sketch Fillet, and type in quarter inch, and go ahead and choose the corners here to round those corners off. Choose all four. Click OK. And there's our shape. Then go over here to Features. Accept that OK. Go to Features Extrude. And we'll type in 1.0. And we'll extrude that little section. It looks great but what happened is that we added a lot more complexity to that sketch. So another way for doing this is, actually add the fillet in these 3D solid. So let's go ahead and use the Undo command, and take that back a little bit, back to the original starting point.
Here it is. Now, with hard corners, I'm going to go ahead and use the features command, extrude. Extrude it 1 inch, click OK, and this time I'm going to add that fillet as a 3D fillet. Click on Fillet. Choose the constant size, Full preview. And for our size we might choose 0.25. Now if I want items to fillet, I'm going to choose this first corner here. And notice as soon as I choose that first corner, it actually brings this little popup window here, allowing me to choose other edges of the design. In this case here, I've picked the first one.
And it selects all those outside edges. Click OK, and there's our first fillet. Really easy to do. And the nice thing about adding fillets on the 3D, not in the Sketch level, is that, because I can always go back here, modify it very quickly. Take 0.5 for instance, and it automatically updates with that new value. I can go over here, I can right-click on it, and I can say Suppress, I can turn those fillets off if I wanted to. So it gives you a lot more power and control over those fillets versus having to actually go back to the original sketch and change those values, or try to delete' em.
So I definitely recommend trying to put that not in the sketch, and put it in the 3D mode. Let's go back to that fillet and jump back to quarter inch. 0.25, and click OK. Now let's play with a few other Fillets and Chamfers. Let's start with the Chamfer command. Up here at the top, under Fillets, we also have Chamfer. So Chamfer, let's choose either a face or an edge to Chamfer. In this case here, I'm going to choose this whole top face. And notice it gives you a preview of what's going to happen, and I'm going to say Full Preview, so it's going to show me all those faces. And I can change the angle, so maybe I change it to 30 degrees, and we can change how much we want to fillet out.
Notice here's an example of what's going to happen. Looks pretty good. Type, click OK and there's my first chamfer on that upper face. Notice by choosing the face, it chooses all the outside edges on it. I can do it again by choosing a chamfer here, and I can choose a face like this and it gives me a chamfer in both directions. I'll say, 0.1 for our chamfer and the sim will say 45 degrees. Not 15, 45. Click OK. And notice because both edges, you have these inside edges around this part here, and the outside edge here.
It's going to chamfer for both of those. Alright. Next, let's try out the Fillet command again. Constant size looks good. I can choose a top face like this. It's going to round out everything that it sees on top of that face. Or if you don't want to choose a whole face, you can pick individual edges to just chamfer for those edges. Backside edges, underside edges, doesn't really matter, you can choose a whole bunch. If you pick the wrong edge, let's go back and click it over here, hit Delete, which'll take it out. I happen to like that whole face, so I'll go back and choose entire face and click OK. Now, keep in mind, notice, these edges here are still sharp.
But what you could do is actually, before doing that entire face fillet, let's use the history bar, roll it back before that feature, come over here to Fillet. In this case, I'm going to choose these outside edges here, and I'm going to choose all four of those. Click OK, and then roll it forward. Notice I placed that fillet five before fillet four. Now it gives it a little different shape and actually rounds these corners off really nicely by placing this fillet before the other. If I flip the part over, I can take a look at a couple other ones. If I choose fillet, this time I'm going to choose a variable radius fillet.
As far as the fillet, I'm going to choose this line here. And what I'm going to do is I'm going to start over here at the very edge. Of the part. You must type in 0.5, and down here I'm going to type in 0.25. You can see I'm starting with a bigger radius and moving to a smaller radius as I move through the fillet. Click OK. And there's a variable radius fillet. Looks pretty good. I can also just choose inside edges for fillets. For instance, I can type in maybe 0.15 and choose an edge like this. It's going to go around the part.
I can either choose a Constant Fillet or a Face Fillet. A Face Fillet will allow me to choose several items that I want to fillet between, and it will fill in that gap between the two. Again, jump back into the Fillet command. A Full-Round Fillet can be used when you have a full edge that you want to completely fillet. In this case here, what I like to have is this edge not filleted. So let's go back. Cancel this out of here. Let's go back and turn a couple of these fillets off. So, in this case here, I can always go back in time and suppress fillets that I'm not going to be using, or don't want it to show at this point in time.
So I can suppress both of those, and what I want to do before I do any of those is actually put a full round fillet here. So I'm going to up to Fillet. I'm going to choose a full round fillet, and it's going to need three different faces. So I'm going to fillet between this face. Click on the next box. This face, click on the next box. And then, come down here and pick the bottom. And notice it gives me a full round preview of exactly what's going to happen. Click OK. And there's my full round fillet. Looking pretty good. Fillets are used extensively in designs. And many times they take up the majority of the features in the tree.
This is especially true with molded or plastic parts. Fillets are easy to apply however, keep track of how you apply the fillets to get that optimal look and feel.
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