HOW TO CREATE A SNAP FIT IN FUSION 360!

hello guys and welcome to daily dose of CAD this is a first episode of a series that I'm gonna start doing to give you guys some CAD engineering tutorials and outline tips and tricks that I found along the way so in this episode of the daily dose of CAD I'm going to outline how to do a snap fit case in fusion 360 it's a feature that I really like using for plastic design in SolidWorks but fusion 360 lacks that and I really like fusion 360 as a software so this is how I do it let's get to it how are we doing guys my name is Adam James and in this video of the daily dose of CAD I'm going to go over snap fit designs and how I typically do it in fusion 360 like I said it's a feature that I typically like in SolidWorks but there's a lack of it in fusion 360 so you know with correct tolerances we'll get to kind of showing how I do it and how you'll be able to implement it into your designs so this is an example of how I have worked it into one of my designs and just thought it's kind of a useful tool that you can add to your toolbox so let's do an example so here's a little shelled out box that I made so I'm just going to try to outline as quickly as I can kind of the basics of of how I create this in its simplest form so what I'll do actually I don't want an analysis on that side I want yes I do okay I'll create a sketch on this face here do you elf or construction line bring it up here a little bit click this press X for construction are for rectangle and we'll just make a rectangle and we'll make it symmetric by going down here to some tree choosing both of these and this to make it symmetric about that axis and boom we'll press d for dimension up and I'm out of the sketch so we'll right-click and we'll edit the sketch I'll press D for dimension and we'll make this line here with uh maybe six millimeters and we'll make this width 40 great that'll work for the purpose of this video so we'll click on this sketch that we just made all right you can see it's selected down here in the timeline and we'll extrude it and the difference between a normal extrusion and the extrusion that I'm going to be using for the purpose of this feature is we're gonna add a taper angle of negative 45 degrees now negative 45 degree taper angle is going to allow the 3d printer to be able to step up really nicely and it's going to be 3d printed really nice typically I would use PLA for this but that's just because PLA is really easy to print with so we will select the feature that we just made and we'll turn the analysis off and then we'll make a mirror create a mirror over just like the mirror plane and for my situation it'll be the front plane and I'll just go you can kind of see it in grey there and there it is cool so now we've got I guess the hook for kind of that snap fit and now what we're gonna want to do is create a lid to go in this and snap in so I'll go ahead and make a new component and I'll rename it lid I'll create a new sketch under the lid component when it's activated right here just click on this kind of edge do you sketch and I'm lazy so I don't want to redraw these again great looking good and then we'll just extrude it up select this control select this will just extrude it up maybe five millimeters or so great okay now let's hide the body with the lid still activated and then we'll do a sketch on the bottom of the lid so we're in the sketch on the bottom side of the lid now let's show the body hide the lid and then we'll do p4 project and we'll just select these so that we don't have to redraw it again maybe I already select that one yeah we'll see that should be okay how's that look pretty good hide the body show the lid and then we're back on the bottom plane and then with the line L we'll just connect these nicely everything's already find by the other sketches so we don't need to do anything else but what we are gonna do is we're gonna create an offset it's in sketch sorry offset we're gonna offset all these projections and the lines I just created inward by negative 0.5 millimeters I'm doing it by 0.5 millimeters because typically 0.5 millimeters when I print with PLA is a good tolerance and turns out really well so we'll just do 0.5 between the clearance our tour for the clearance between the lid and the body cool and just so you can kind of see what I mean this outer line here is the inside shell of the body and then this line here is the inside of the lid that will be going into it so it just gives it that little bit of clearance so that it can slide right down into it so we'll stop the sketch we'll hide the body and we'll click on the sketch that we just made and we'll extrude out six millimeters and I got six millimeters because if you show the body again let's actually activate the body you see that this distance from the top to the bottom is indeed six millimeters so I wanted to be that length and depth when we extrude it and maybe if we turn our analysis on the other analysis oh I don't have another analysis we'll do this one there we go so you can see what's going on here we've got a little bit of tolerance between these but now there's some intersection between the lid portion and the outer shell so what I'm going to do is we're going to turn the analysis off we're going to go ahead and activate the lid again and because we have that conflict between this kind of extruded chamfer here we need to make an extrude chamfered cut for it to you snap into you so the easiest way that I do that is I'll hide oh excuse me I'll hide the lid I'll show the lid and I'll create a sketch on the same side that we want that sketch forward this the chamfered cut to be on so I'll create a sketch once we have the sketch created we can show the body hide the lid and then we can project again and we'll just project these lines of that chamfered extrusion what that's going to do is you'll be able to see this in a little bit this is gonna extrude those onto the surface of where we want that feature to go so you can see now these lines which we made the extrude cut on are now on this plane so let's hide the body again we'll go to the back plane and we're actually done here so we'll stop the sketch we'll click on this sketch again we'll extrude extrude it in word for a cut and we're gonna do okay we're gonna do negative 45 degrees so that looks well and then I'll do go to modify click on chamfer and we'll just bring this in one millimeter or so and I'll show you why I did that in just a second so click on the chamfer click on the extruded chamfered cut and then go to create mirror and then we will mirror it over for my case it'll be the back plane or the excuse me the XY plane okay looking good so let's see where we're at now let's bring the analysis in so it looks pretty good I've got a little bit of tolerance here we've got this extrusion our excuse me this chamfer here but I think what it's missing is oh we still need to shell it so let's hide the body let's turn the analysis off and we're just going to shell this so I always do the shell last because it allows you to go around this feature as well so that looks pretty good let's see what we're working with now turn let's just activate everything turn the analysis on and go right here for some reason it shelled the inner wall here which I didn't necessarily want to do but I guess to fix that what I can do is I can make the upper let's activate the lid here I can make the initial extrusion upward maybe four millimeters or so and then it shouldn't do it okay that looks pretty good cool that is it guys oh and I was gonna say this little chamfer here is just so that maybe I can bring it down so you can see when it comes down it's gonna kind of hit that it's gonna slide and then it's gonna come down and snap it into that so really helpful for this kind of feature or or this tool another tool in your toolbox and because we show that now can flex inward depending on what material you use of course but that's it guys thanks for watching

Channel: adam james

Views: 43,832

Keywords: snap fit case, adam james, snap fit case in fusion 360, how to make a snap fit in fusion 360, autodesk, fusion 360, engineer, plastics engineer, snal fit, snap fit cad, how to make a cnap fit in cad

Id: HcLT5Hz9-mk

Length: 13min 32sec (812 seconds)

Published: Thu Jun 07 2018