Identify how to hold a complex part

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In this video, will identify how to hold a complex part.

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After completing this step, you'll be able to use inspect and create a comment.

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In fusion 360, we want to get started with the dataset coupler for CNC Mill.

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This design has a generic vice as well as three different couplers.

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Notice that as we're looking at these couplers, they're placed in soft jaws on the vice.

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We're going to begin by isolating coupler two by right clicking and selecting isolate.

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We're going to be looking at coupler two,

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because we're creating a program to machine three of these parts and we want to replicate everything that we do.

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When we look at a part like this, we need to identify how we're going to hold it now.

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Often times that means that we need to determine how we're getting this part. Is it starting from raw stock.

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Are we getting a cast or forged part or maybe in this case maybe it's a metal manufactured part and we need to do some finish machining.

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In this case we're going to assume that we're starting with raw stock and we need to machine everything.

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So my first step is generally to go to select and I want to take a look at the selection tools and select by boundary.

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I'm going to select my part and I'm going to take a look at the size of stock.

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Noting that its 1.548 by 1.548 x .866.

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So if I'm looking at standard available stock sizes,

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I'm likely going to go to a one and three quarter inch by one and three quarter inch by 1 inch stock.

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And when I take a look at this,

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you'll note that what we see on the screen is enough material around the outside of the part to machine everything we need.

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When we think about this, however, we need to determine how much stock is actually above and below the part.

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So we're going to say okay. And we're going to take a look at the overall height of the part.

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We're going to inspect the top height all the way to the bottom.

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And we can see that it's .866 or 22 millimeters.

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We're going to leave a few comments and we're going to do this by going to the comments section at the bottom of the browser.

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I'm going to capture an image and I'm going to say height of part 0.866 inches.

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I'm also going to add stock size and this is going to be 1.75 by 1.75 by one inch.

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When we do this, we need to consider how much stock is going to be above and below the part.

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When we do this, we're taking that overall stock of one inch and we're subtracting the .866 of our part.

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When we do that we get 0.134 and that's going to be divided by two.

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Which ends up giving us .067 on top and bottom of part.

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This is going to be important because when we flip it over,

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we need to know how much stock is on the top of the part and capturing these comments in the design is going to be helpful.

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Some other things we might want to consider is going to be what happens on the inside bore of this part.

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Remember earlier on when we saw this part there was originally a spline set in here and we removed it and we added comments in that design.

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But this design doesn't have those comments.

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So we're going to capture the image and we're going to add those comments.

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We're going to note that the broach that's going to be used for the splines,

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is going to be 10 millimeter OD by 8.5 millimeter ID and 12 splines.

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So again, capturing that information helps downstream. So we can remember what we're doing here.

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We can remember all the information that's needed.

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Other than that this file is ready to go and we can right click and a nice await the coupler putting it back inside of the soft jaw.

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If we want to take a look at how these are being held,

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we can always hide the coupler and we can take a look at the geometry and the soft jaw on how it's going to be held.

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This is going to give us a firm base once we flip the part over,

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and another thing that we want to take a look at is going to be the amount of distance between the top of the vice and the part itself.

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It looks like .142inches. So this is going to give us a good idea of how much material is sticking above the part.

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When it's machine from the other side,

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we're going to machine the entire outside bore and all the features on the bottom as they're critical to be held in the soft Jaw.

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But when we flip it over, we're only going to need to take care of the chamfer so we're going to bring back the other coupler.

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I'm going to go back to a home view and make sure that I save this design before moving on to the next step.