How to Model a Knife Blade in Fusion 360 FF124

for this I'm going to start with sketching the profile of my knife blade so I'm going to create a sketch on the front plane and I'm sketch a line from the origin dragged roughly out the size that I want and then from that I'm gonna click and hold my left mouse button down drag up my arc drag back to the beginning again sometimes it's easier to stop short and get back to the origin and then we can just come and add a horizontal or vertical constraint to that line to make sure that we get it right from there we can start to add some dimensions so I'm gonna do deeper dimension I'm going to select this top line and that is going to be 8 inches this dimension is going to be 2 inches this radius is going to be 3.5 inches everything is black and fully defined on my sketch so that's gonna be my initial knife blade profile I'm gonna stop that sketch and I'm gonna extrude it and when I extrude it I'm also going to do this one as a symmetric extrusion I'm gonna check that box for the whole width and then the total width is gonna be 0.25 so go ahead and click OK so now what I want to do is I want to create a path sketch for my profile to follow so first I'm gonna create the path and then I'm gonna create the profile so I'm going to sketch a line on this face and I'm just gonna click somewhere in space here and then I'm gonna click and hold to swing mark off and you probably want to bring your arc off quite a long ways now I can use some constraints and dimensions to get this fixed up so I know that this arc and that arc of that original night plate are gonna be concentric I also haven't given a dimension of 1.5 from this edge to this point and the total offset for this is 0.5 inches now every part of mine my sweep is defined except where you see the white dot out here and that's saying that this can move this isn't fully defined yet so we're just gonna drag it off and that should be okay now we can stop our sketch now we can do our profile sketch but because there's no flat face at the end of this line what we need to do first is construct a plane so we're gonna use a plane option called plane along a path and we're gonna select the path now again like I said if you click than 0 that'll be the end the line if you make this one that'll be 2b I'm sorry that'll be the end of the line 0 is the beginning of line and if I were to do point 5 that would be halfway down that distance so what we want is 0 I'm gonna go ahead and click on 0 and click OK now I'm gonna sketch my profile so I'm going to create a line on this point and I have to project some things first so let's do sketch and project include project and the one thing I want to project and for sure is going to be my origin so I'm gonna click on that zero point and project that in I also want to project in I can either click on the line or the point so if I just click on that line it'll give me a point now what I want to do is look square on at that and I'm going to slice the sketch so I just see those those two points now I'm gonna connect the dots so I can do a line from here to here so I'm still in the line command we're gonna come up to that edge and we're gonna come up over there now again sometimes it's tough to tell if it gets locked on it looks like in my case it did sometimes it's easier to extend it out and add a coincident point after you extend that off to make sure it's exactly at the point where you want it so I'm gonna stop my sketch go back to an isometric view and now I'm gonna create a sweep again this profile can be hard to get to sometimes it's being blocked so what I could do is I could turn off the body and then I can easily come and grab it here you can see that sketch is blocking me so I can come to the side and grab it if you do do it this way when you select your profile a member to turn your body back on before you try to complete the command or fill the other thing I can do is I can just hover my mouse over that triangle click and hold and then wait until the profile sketch that I want right there now I can select that and now I can choose my path sketch my path is going to be that so I'm gonna go ahead and click OK now let's work on the kind of curved part of this so to do that I'm gonna sketch an arc three-point arc on this face and I want it to be locked to that point and anywhere out here you feel that you like you can dimension this as as you wish dot is the sketch the first sketch I'm gonna need I'm now gonna put another sketch in the bottom face some sketch another arc so select in arc three-point arc on this face and we're going to choose that and that point it's possible you may have to project that in I didn't in my case so it projected that it's it shows me that it made a tangent I could have also came and added a tangent constraint separately I'm gonna stop the sketch now what I'm going to do is I'm going to create a loft between this profile and this profile it's gonna choose the shortest distance to get there but I want to add a rail so I'm gonna click the plus under the rail section and choose that last sketch that we created and click OK and now it's given me that finished off shape I don't want to do all that work again so I'm gonna create a mirror I want a mirror features and the features that I want to meet her are the loft in the sweep I'm gonna choose my mirror plane again this plane can be hard to select I'm just gonna hold my mouse let go of the mouse button now I can see my face I can see my plane and I can see my other face I want the XZ plane I'm then gonna go ahead and click OK and there you see we get our fully finished knife blade

Channel: NYC CNC

Views: 48,293

Keywords: tormach, fusion 360, how to, cnc, machine shop, nyc cnc, DIY, machining, milling, CAD, cnc machining, cnc milling, knife blade, tutorial

Id: XpqXMJNatB8

Length: 6min 23sec (383 seconds)

Published: Thu Mar 22 2018