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Introducing sketching

From: Up and Running with Autodesk Inventor

Video: Introducing sketching

Now that you have an understanding of the interface, it's time to begin working on the first step in building a 3D model, that is sketching. Sketching is the foundation of all modeling in Inventor. At the most basic level, if you can sketch a rectangle then you can build a 3D part. Perhaps, it won't be the most interesting part, but it is a part nonetheless. Within a sketch you build intelligence into the model by adding dimensions, constraints, and formulas to define how the part can change over time. The best way for you to understand this is for me to show you. I'm going to create a New Part File and walk through a few basic steps of taking 2D geometry and creating 3D features or parts out of that.

Introducing sketching

Now that you have an understanding of the interface, it's time to begin working on the first step in building a 3D model, that is sketching. Sketching is the foundation of all modeling in Inventor. At the most basic level, if you can sketch a rectangle then you can build a 3D part. Perhaps, it won't be the most interesting part, but it is a part nonetheless. Within a sketch you build intelligence into the model by adding dimensions, constraints, and formulas to define how the part can change over time. The best way for you to understand this is for me to show you. I'm going to create a New Part File and walk through a few basic steps of taking 2D geometry and creating 3D features or parts out of that.

It's not important that you understand each of these steps. Only that you understand the connection between sketching and part modeling. We'll get into the details of each of those as we move forward in the course. I'm going to begin by sketching a basic rectangle and extruding that. This should give you at least an initial feel for what 2D shapes turn into when you apply a 3D modeling action to them. In this case, I'm going to go ahead and extrude, and this rectangle can become a cube.

Next what I'm going to do is I'm going to create a new sketch, and this time I'm going to sketch a simple circle. When I finish my sketch, I can now apply a modeling action to it to create a 3D shape. When applying the modeling action, I do have the ability to add material like I'm doing in this case, or I can always go back and Edit--or choose to do this in the first place-- and change things to a Cut to remove material from this model.

So the shape can either be a positive or a negative. And it's your choice as a designer to determine which makes most sense in your design. I'm going to go ahead and create another part to show a little bit more advanced functionality. This time I'm going to combine the two items that I just created. I'm going to go ahead and create a rectangle, but I'm also going to combine that with the circle.

Now the size doesn't matter right now, we'll get into those details later. But what's important here is I can combine multiple sketch profiles in order to create that 3D shape. Here I can select a rectangle and the circle to get a new more complex 3D shape. Now it's also important to understand that it's not just extrusions that we're going to be doing. If I undo that extrusion, the same shape that I drew to extrude, I could apply a revolve action to that. It's a similar function where I select what profiles are going to be used, but in this case the modeling action allows me to select an axis.

With this axis selected, you can see that I get a very, very different shape from just adding extrude to that. Based on this, you should have a basic understanding of the connection between sketching and part modeling. The shapes you sketch become 3D features. That can then add and remove material to define what your part looks like. Not only can you sketch different shapes, but you can apply different modeling actions to those shapes to meet your design needs.

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This video is part of

Image for Up and Running with Autodesk Inventor
Up and Running with Autodesk Inventor

40 video lessons · 8572 viewers

John Helfen
Author

 
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  1. 1m 28s
    1. Welcome
      41s
    2. Using the exercise files
      47s
  2. 8m 3s
    1. Exploring major workflow steps
      2m 19s
    2. Reviewing different file types
      4m 43s
    3. Exploring essential settings
      1m 1s
  3. 21m 39s
    1. Navigating using the ViewCube
      3m 26s
    2. Navigating using the navigation tools
      5m 36s
    3. Using the browser
      3m 17s
    4. Using the ribbon bar
      2m 10s
    5. Using the Quick Access Toolbar
      1m 4s
    6. Customizing the toolbars
      3m 7s
    7. Using the Marking menu
      2m 59s
  4. 48m 42s
    1. Introducing sketching
      3m 18s
    2. Working with origin geometry
      3m 47s
    3. Understanding constraints
      8m 43s
    4. Drawing with the Line tool
      8m 8s
    5. Dimensioning a part
      5m 0s
    6. Creating parameters
      8m 50s
    7. Creating circles and rectangles
      10m 56s
  5. 38m 31s
    1. Introducing part modeling
      2m 34s
    2. Creating a base extrusion
      5m 12s
    3. Creating multiple extrusions
      7m 35s
    4. Creating a cone by revolving
      6m 12s
    5. Creating holes
      6m 12s
    6. Creating a threaded hole
      3m 3s
    7. Using placed features
      2m 33s
    8. Editing part features
      5m 10s
  6. 25m 52s
    1. Introducing assemblies
      54s
    2. Placing components
      6m 29s
    3. Creating and managing constraints
      7m 50s
    4. Assembling parts
      7m 16s
    5. Understanding the Insert constraint
      3m 23s
  7. 25m 12s
    1. Exploring initial drawing creation
      4m 43s
    2. Placing views
      6m 11s
    3. Creating section and detail views
      5m 10s
    4. Setting basic dimensions
      2m 43s
    5. Changing dimension precision
      1m 24s
    6. Creating baseline dimensions
      1m 52s
    7. Creating center lines, center marks, and hole notes
      3m 9s
  8. 1m 20s
    1. Next steps
      1m 20s

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