Create extruded features

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Create extruded features.

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In this video, we’ll create an extruded body, we’ll start an extrude from a plane and start an extrude from a face.

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For this video, we're going to carry on with our gear reduction housing solids.

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But first I want to take a look at the bearings that are going to be used in our gear assemblies.

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Right now, we have three separate McMaster-Carr part numbers that we're going to be using that's based on our spec sheet.

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We have our bearing, that's a 5972K276.

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This bearing, you can see, has a couple values that are going to be important to us.

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It has a 12 mm inside diameter and it has a 21 mm outside diameter.

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This is a rather large bearing and this one is going to be going inside of the larger gears.

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Remember that we do need a 10 mm shaft coming out of the housing.

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When we're using a bearing that has a 12 mm inside diameter that allows us to create a shaft with a step in it.

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That gives us a 10 mm, either a threaded portion or a spline and something that we can still manufacture.

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Note that the bearing width in this case is 5 mm.

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If we move on to the next bearing, we're taking a look at a 5972K286.

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This one here has a 10 mm inside diameter and it has a 22 mm outside diameter with a thickness of 6 mm.

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Once again, this is a bearing that's going to be used in certain areas of our design.

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Remember we do need that 10 mm.

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So we have one of these bearings that will be going in our larger drive gear and then we have one that will be nested inside of our driven year.

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These will be used to ensure that the shafts are concentric and they allow for us to have an input and an output shaft that is along the same axis.

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And lastly for our idle gears, we have the 5905K73.

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This is a needle bearing setup that has an 8 mm shaft, an 8 mm thickness and a 12 mm outside diameter.

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These are going to be the bearings that are going to go inside of the idle gears,

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and then the longer idle gear that's 21 mm long, will have one on each end.

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So these are the three bearings that we're going to be using inside of our gears.

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So this helps us better understand the size constraints that we're working with.

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Now let's hop into Fusion 360.

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In Fusion 360, we’re carrying on with our gear reduction housing solids.

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To get started, I do want to mention that we are going to be creating bodies and we'll work on converting them to components later.

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There are different ideas or different workflows that we can follow when we're designing new components.

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Because we're just beginning to learn about creating sketches and creating bodies,

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we’re going to be taking the approach of creating these initial features and using the body method.

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There are some nuances that we'll talk about later on in different videos where we talk about the creation of components.

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If you're more familiar with Fusion 360 and you want to create these as components now, that's perfectly fine.

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You can do so by going to Assemble and creating a new component or by using the New Component option when we create our first extrude.

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First, let's get started by selecting Extrude.

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I want to select all of the various closed regions here.

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We're going to worry about removing material later.

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So I'll do a box select.

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I'm going to begin dragging this back to start creating our solid body.

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However, we did all the work to set up our planes for the different areas of our housing.

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So instead of setting the Extent to Distance, I'm going to use To Object and I'm going to select my housing back.

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This is creating a new body and we'll say, OK.

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It automatically makes the sketch visibility turn off, but we can always bring it back whenever we need to create another extrude.

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Extrudes can start based on a sketch but we can also use the housing if we wish.

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So I'm going to select this face.

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I'm going to go to Extrude and instead of Distance, once again I'm going to go To Object, but I want to select my mid plane.

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So we'll go to housing mid noting that it is automatically adding it to the rest of the housing.

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When I do this, we need to be mindful of whether or not we do want to join it or if we want to create a new body.

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The nuance here is whether or not we are creating a single area for these gears to be,

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or if we're going to be adding additional material to the front of it.

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What I want to do at this point is join them together.

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So I'm going to use the Join option and say, OK.

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Because these are parametric features meaning there are parameters that control them on the back end.

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If I made a mistake and decided that was really supposed to be another portion of a housing,

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I can always go back and edit those features by double clicking or right clicking on them in the timeline.

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I can change this from Join to New Body.

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However, the only nuance here that's important is that the new component option does not appear.

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Once we've done join a cut or an intersect, we can only go back and change it to a new body and not a new component.

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Now added that new section, let's go back to our sketches and bring back our housing layout sketch.

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At this point, we need to add some additional material to the front.

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We're going to do this by once again creating an extrude.

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Notice when we try to select the sketch, it's actually selecting the front face of this body.

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We can change our selection priority by going up to our Selection Priority or Selection Filters.

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Or we can simply hold down the left mouse button which will bring up a Selection dialog, allowing us to select the different profiles.

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You can also temporarily go into your Bodies folder and hide Body 2 to make this selection process easier.

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Sometimes it's also easier if we hide the various planes as they could potentially get in the way.

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Any of these options are fine and it really depends on what your workflow is and what you're comfortable with.

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For this example, since most people will be doing this process manually, let's go ahead and manually select all the different areas.

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And once we've done that we can bring back the construction planes.

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From here, we're going to extrude this a Distance To Object.

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We want to select that housing front.

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This is going to join with the other body, Body 2.

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And we want to make sure that we set this to Join and we hide Body 1.

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If we hide Body 1, it's only going to join with the existing body in this case, Body 2 that it's currently intersecting with.

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So now we have two bodies.

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We have Body 1 which is our back and Body 2 which is the front.

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We are going to have some additional parts of this.

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We're going to have some covers and some different areas where we need to make sure that,

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we have the idler gears and the driven gear in this front section and the larger gear is going to be inside this back section.

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It's some openings for the input and output shaft as well as the bearings that are going to support those.

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Or we create any other geometry, let's make sure we do a quick save and then we can bring back our housing layout sketch.

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Now we want to actually remove a bit more material from the inside of this housing.

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Again, removing some material, we're going to start by creating a new sketch on this front face by selecting Create Sketch.

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We then can project some of the geometry and we can also create some new geometry.

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I'm going to project the smaller circle from our original housing layout sketch by hitting P on the keyboard.

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I'm also going to bring in the lines and the larger circle and then say, OK, and hide my housing layout sketch.

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We can't simply take this and create an offset, but what we can do is we can use some modify tools to trim away some of this existing geometry.

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Notice that when we select this, it's not allowing us to completely get rid of it, but if we hit Escape and we convert each of these to construction,

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this will allow us to create a new sketch element in this case, a center diameter circle,

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that matches exactly the position of the original and now we can use our trim to get rid of those sections.

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We're getting a warning that's telling us that some of the constraints will remove.

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But you'll note that the lines and the arcs are still fully defined.

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Now we can use offset and if we turn off Chain selection, we can manually work our way around including those projected entities.

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We begin dragging this in, we can go minus and this is going to be our Housing_Wall_Thickness.

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When we use our Housing_Wall_Thickness and say, OK, we've now created an offset sketch.

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We're going to finish the sketch and use extrude on that intersection.

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We're going to begin dragging this back.

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It's going to go up to a specific object in this case, housing mid.

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We can select objects to cut but note it's only trying to cut through Body 2 and we can say, OK.

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Now we were able to remove some material that gives us enough room to start placing the gears in the front section of our housing.

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Let's put this back in a home view and quickly go into our change parameters list and take a look at some of the parameters,

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and how they'll affect our design.

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I'm going to pull this over to the upper right hand side and I want to take a look at this housing thickness value of 3 mm.

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If I change this to a larger value, for example, 6 mm.

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Not only does it affect the thickness of the extrude we just created, but it also affects the position of other areas inside of our object.

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This is because we use that gear thickness to create some additional functions.

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If we increase it to 10 mm, you can see the drastic effect it's having on the back of the housing as well as the thickness of this wall.

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We're going to reset this to 3 mm as that's the value that we want to use.

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And for right now, let's make a save before moving on.