Inventor 2014 Essential Training
Illustration by Richard Downs

Creating a base extrusion feature


Inventor 2014 Essential Training

with John Helfen

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Video: Creating a base extrusion feature

We're now to the portion of the course where we can start really looking into the settings into some of our sketch features. We're going to start with the extrusion, and I'm going to break the extrusion functionality up into several movies because I want to talk into detail about some of the settings, and some of the uniqueness about the extrude. And the one thing that really helps people with Inventor, is once you learn how to create one feature like an extrude, we use very similar options, throughout things like revolve and loft and other features.
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  1. 1m 24s
    1. Welcome
    2. Using the exercise files
  2. 6m 20s
    1. Exploring major workflow steps
      2m 19s
    2. Reviewing different file types
      4m 1s
  3. 22m 3s
    1. Navigating using the ViewCube
      4m 56s
    2. Navigating using the navigation tools
      5m 31s
    3. Using the browser
      3m 34s
    4. Using the ribbon bar
      2m 47s
    5. Using the Quick Access Toolbar
    6. Using the Marking menu
      4m 33s
  4. 22m 6s
    1. Basic menu customization
      6m 40s
    2. Custom ribbon bar panels
      6m 22s
    3. Keyboard
      5m 9s
    4. Marking menu customization
      3m 55s
  5. 20m 24s
    1. Project file introduction
      3m 54s
    2. The project file: .ipj
      4m 4s
    3. Setting up the project file for this course
      7m 11s
    4. Frequently used subfolders
      5m 15s
  6. 22m 31s
    1. Introducing sketching
      4m 55s
    2. Working with origin geometry
      4m 46s
    3. Understanding constraints
      7m 39s
    4. Application options
      5m 11s
  7. 50m 43s
    1. Drawing lines
      6m 29s
    2. Creating rectangles and arcs
      9m 26s
    3. Creating splines
      6m 35s
    4. Creating slots
      5m 43s
    5. Construction geometry
      6m 18s
    6. Dimensioning
      9m 34s
    7. Parameters
      6m 38s
  8. 30m 33s
    1. Move, copy, and rotate sketch geometry
      7m 43s
    2. Trim, extend, and split sketch geometry
      6m 20s
    3. Scale, stretch, and offset geometry
      7m 47s
    4. Creating rectangular, circular, and mirrored sketch patterns
      8m 43s
  9. 19m 27s
    1. Understanding work features
      3m 58s
    2. Creating offset work planes
      4m 17s
    3. Creating work planes
      6m 59s
    4. Creating work axes and points
      4m 13s
  10. 16m 50s
    1. Projecting geometry
      7m 7s
    2. Importing AutoCAD data
      9m 43s
  11. 54m 31s
    1. Part feature introduction
      5m 14s
    2. Creating a base extrusion feature
      8m 46s
    3. Keeping extrusions connected with the To next face/body option
      4m 29s
    4. Creating revolves
      7m 42s
    5. Creating complex shapes with the Loft tool
      8m 50s
    6. Adding control to a loft by creating rails
      8m 40s
    7. Creating a sweep feature
      6m 16s
    8. Creating a sweep feature with model edges
      4m 34s
  12. 24m 44s
    1. Adding holes to a part model
      10m 10s
    2. Modifying edges with fillets and chamfers
      4m 18s
    3. Hollowing parts with the shell feature
      10m 16s
  13. 25m 37s
    1. Creating rectangular feature patterns
      9m 23s
    2. Adding intelligence to a rectangular pattern
      5m 45s
    3. Creating rectangular feature patterns along a path
      2m 22s
    4. Creating circular feature patterns
      3m 11s
    5. Mirroring part features
      4m 56s
  14. 31m 30s
    1. Understanding iParts and iFeatures
      3m 19s
    2. Creating an iPart from an existing part
      11m 0s
    3. Changing between versions inside an iPart
      5m 50s
    4. Extracting iFeatures for use in other parts
      5m 11s
    5. Inserting iFeatures into a part
      6m 10s
  15. 26m 23s
    1. Introduction to assemblies
      1m 59s
    2. Placing components
      7m 40s
    3. Creating components in the context of an assembly
      8m 9s
    4. Placing fasteners from the Content Center
      8m 35s
  16. 46m 14s
    1. The Mate/Flush constraint
      9m 42s
    2. The Angle constraint
      5m 34s
    3. The Insert constraint
      3m 55s
    4. Driving constraints
      10m 0s
    5. The Transitional tab
      3m 50s
    6. The Motion tab
      9m 18s
    7. Contact sets
      3m 55s
  17. 18m 38s
    1. Adding materials to parts in an assembly
      4m 3s
    2. Visual styles
      4m 52s
    3. Enhancing the design experience with shadows
      2m 9s
    4. Adding a ground plane, reflections, and perspective to a design
      3m 34s
    5. Changing the lighting style to match a design
      4m 0s
  18. 39m 11s
    1. Exploring initial drawing creation
      5m 6s
    2. Placing base and projected views
      9m 31s
    3. Creating section views
      8m 0s
    4. Creating detail views
      3m 56s
    5. Creating a breakout view
      5m 41s
    6. Creating auxiliary and cropped views
      6m 57s
  19. 25m 57s
    1. Creating general dimensions
      9m 20s
    2. Changing dimension precision
      4m 21s
    3. Creating baseline, ordinate, and chain dimensions
      5m 51s
    4. Creating baseline, ordinate, and chain dimension sets
      6m 25s
  20. 10m 43s
    1. Creating individual balloons
      4m 34s
    2. Creating a group of balloons with automatic ballooning
      3m 40s
    3. Adding a parts list to the drawing
      2m 29s
  21. 30s
    1. Next steps

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Watch the Online Video Course Inventor 2014 Essential Training
8h 36m Beginner Apr 17, 2014 Updated May 19, 2014

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Already up and running? This course is the next step in building your Autodesk Inventor skillset. Author John Helfen takes you through the interface and key processes of this parametric design system, including sketching, part modeling, assemblies, and drawings. Each process works in conjunction with the rest, allowing you to create parts and assemblies and document them in a way that they can be manufactured. Learn how to set up your project file; create and modify geometry; create extrusions, sweeps, and lofts; build parts with placed features and patterns of features; and create iParts and iFeatures. John also covers assembly visualization techniques, drawing views, and balloons and parts lists.

The course was created and produced by John Helfen. We're honored to host this training in our library.

Topics include:
  • Customizing Inventor's menus
  • Drawing rectangles, arcs, splines, and slots
  • Moving, copying, and rotating geometry
  • Trimming, splitting, scaling, and stretching geometry
  • Creating work planes
  • Projecting and importing geometry
  • Creating extrusions, revolves, sweeps, and lofts
  • Adding holes to a part model
  • Creating rectangular feature patterns
  • Creating iParts and iFeatures
  • Using constraints to position parts
  • Creating drawing views
  • Setting dimensions
John Helfen

Creating a base extrusion feature

We're now to the portion of the course where we can start really looking into the settings into some of our sketch features. We're going to start with the extrusion, and I'm going to break the extrusion functionality up into several movies because I want to talk into detail about some of the settings, and some of the uniqueness about the extrude. And the one thing that really helps people with Inventor, is once you learn how to create one feature like an extrude, we use very similar options, throughout things like revolve and loft and other features.

So that once you have the basic understanding on how to create one feature, that translates to other components as well. So I'm going to start with the extrusion command and focus a lot on the settings. Which hopefully will make the remaining features that we're going to cover a little bit easier. I'll start by creating a new part, selecting Standard.ipt as my template and clicking Create. As I mentioned previously, the very first feature in a part is going to be a sketched feature. It's called the base feature.

And it is a little unique because it's the very first feature. So I'm going to go ahead and create a new 2D sketch. I'm going to select a plane to sketch on. And we can begin creating our geometry that we want to extrude. I'm going to right-click in the graphics window, and select Two Point Rectangle from the marquee menu. I could also go to the draw panel and select Rectangle as well. But I prefer the heads up display. I'm going to start my rectangle at the center of the sketch, and I'm going to use the heads-up display to enter a value of two for its length.

I'm going to hit Tab on my keyboard and enter one as its height. I'm going to hit Enter on my keyboard to enter that, and the geometry is created. I'm now ready to finish this sketch and apply a modeling action. Here we're going to use the extrude. And again, you can see this sketch is unconsumed in the browser. And because this is a sketched feature, when I click extrude. What you'll find is Inventor automatically selects the one rectangle that was available that was available for extrusion.

And it brings up the heads-up display, now I'm going to move this around just so we can talk a little bit about some of the settings here. The other thing I want to call out is the fact that we have what is essentially the original extrusion dialog box, available. And sometimes we have students or new learners to Inventor, look at this just so they can see visually some of the options that are available a little more clearly. But, all of the features are available in both of these displays even though you are going to most likely lean towards the heads up display.

You can see that I have a profile option here and here. I have different output methods here and here. I have the different types of extrusion I can create in this line here. And I have the direction located on this drop down. Now you'll also notice, I'm going to collapse this, because I do like the heads up display. It's a little less in your face and it, it just stays out of the way a little more. So I leave this collapsed by default. Since we only had one profile, Inventor automatically selected it and set it to a distance.

To the left of that distance, we have what's called the termination type. Right now it defaults to a one inch distance, and we can change that distance if we want. And we can also select to a specific face or point, or between two faces. Generally, the first extrusion is going to be to a distance, so we'll leave that there. As I mentioned, we do have two different output types. We can output surfaces or solids. In this case, we're going to focus on the solids. And because this is the very first feature, we don't have the option to join, cut or intersect material.

We only have the option to create a new solid. And this is because it's the very first feature and it's what we're going to be building from from this point forward. The other option is the direction. We can simply select different direction options, to toggle back and forth the direction we're going to extrude. The symmetric option will maintain that set distance, but it will extrude a half inch in one direction and, and a half inch in the other direction. Finally we have asymmetric, which allows you to change the distance on each side of that extrusion.

I'll go ahead and set that back to it's original direction and click the green check mark to create the feature. If we zoom back to the home view you'll notice that we have the Extrusion 1, the original sketch that we used to create it, and we're ready to continue modeling. So what I'm going to do is I'm going to select this face on this model, and use the heads up display to create a new sketch. Next I'm going to go ahead and right-click in the graphics window, and select Two Point Rectangle, and create a rectangle in the inside starting at the top line.

Down to the bottom corner roughly so it looks like it's offset. Essentially what we are going to do is create a U channel. I'm going to right-click in my graphics window and select General Dimension, and I'm going to dimension the distance I want that rectangle offset from the original outside edge. In this case I'll enter 0.25. While still in the dimension command. I'll continue around adding additional dimensions. Rather than enter 0.25 for every single one I'm simply going to click on the original 0.25 dimension to enter its parameter so that I only have to change this one and update all three of these that I'm creating.

I'll select that original 0.25. And now if I want to change that, I can go back to here, change it to 0.125, and all the dimensions update. I'm going to go ahead and cancel out of the dimension command and undo that so I'm back to my 0.25. And I can finish my sketch. This time when I go to hit the extrude by right-clicking and selecting Extrude from the marquee menu, something different happens. Because this isn't our first feature, we now have been placed into the Profile section which allows us to select which shape we want to take action on.

For this part, I'm going to select the inner rectangle. And it extrudes it to a distance. It remembers the previous distance we used. And it's adding material. In the first feature, when we looked at this type of extrusion, we didn't have the option for Join, Cut, or Intersect yet, because it was the very first feature. So now that this is the second feature, we have the ability to decide the type of extrusion we're going to create. Join will obviously add material, Cut will remove material, and Intersect will create a solid at the intersection of the two shapes.

Here I'm going to select Cut. And you'll notice that since we extruded to 1.3125 previously, that that value is still entered there. And if we were to hit OK, or click the green check box, you'll notice that the solid looks as if that rectangle cut all the way through the part. And it has. But what's important here is we didn't really talk about the type of termination we're using on the extrusion. Let me show you what I mean. I set that to a distance, and I extruded it.

But because Inventor is a history based modeler, I can essentially go back in time, by double clicking Extrusion 1, and changing it from 1.3125 to say, 1.5. You can see the update previews. And when I click the green check mark the model updates, but this second extrusion, because it was set to a distance, essentially is pulled back into the model and doesn't cut all the way through, which is not my design intent. So let's go back and double-click on Extrusion 2 which brings us back into the creation dialog box where we can go back and adjust settings.

And the setting we need to look at here is rather than extruding to a distance, we want to go through all. And what that does is, it just means cut all the way through the part, regardless of how thick it is. And that comes in really handy because now, if I were to go back and make changes, I can ensure that this cut is going to run all the way through. Those are the basic settings for extrusions. Now we'll look at another type of termination.

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