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Trim, extend, and split sketch geometry

From: Inventor 2014 Essential Training

Video: Trim, extend, and split sketch geometry

In this movie we're going to continue talking about editing sketch geometry. We'll begin by creating a new sketch. And just follow arround, and the, the size doesn't matter here.

Trim, extend, and split sketch geometry

In this movie we're going to continue talking about editing sketch geometry. But this time we're going to focus on the Trim, Extend and Split commands. I'll start a new part by clicking the New button on the toolbar, selecting standard.itp on the template and clicking Create We'll begin by creating a new sketch. We'll select Create 2D Sketch and we'll select a plane to draw on from the origin geometry that's presented. We're now in the sketch environment and we're ready to begin sketching. Now, I'm going to go ahead and create a very basic shape.

I'm going to right-click in the Graphics window and select the Line tool. And I'm going to lock my geometry to the origin point of the sketch by left-clicking to start my line. I'll create a horizontal line. And just follow arround, and the, the size doesn't matter here. We're really focused on the shape, so that we can show the Trim, and Extend, and Split commands. So I've gone through and made a very basic shape. If during my design process, I decide that I need to change this shape, I could delete geometry and recreate it.

Or, for example, if this design changed and we needed to remove this top section of the sketch, we could go to the Modify panel and use the Trim and Extend commands to help do that. I'm going to start by going to the Modify panel and using the Extend command. While in the Extend command, if you hover over geometry Inventor is going to automatically begin showing you a preview of the type of extend that's going to happen. You'll notice that it even happens if you hover over other items that aren't going to connect with that point.

So, I could make this a rectangle by clicking on this line and then clicking on this line. But in this case, since we want to remove the geometry at the top, I'm going to hover over this line here, the horizontal one and left-click. What Inventor has done is taken this single piece of geometry that had stopped at this end point and just extended it until it hit the next piece of geometry. Now, I could go back up to the toolbar, to the Modify panel, and select Trim, but while I'm still in this command because Trim and Extend are often used together you can right-click and just toggle between Extend, Trim and Split, all three.

So, in this case, I'm going to switch over to the Trim command and I can now select these lines and you'll see a dotted line showing where geometry's going to be removed. If I were to click on this line, we'd be back to where we started. We would have extended it out to the vertical line on the left and then removed it as well. But what I want to do here is trim this line. Essentially now, I have these two pieces of geometry that I can right-click and get out of that command by hitting Escape or Cancel. And then I can window those pieces of geometry and just hit Delete on my keyboard.

And I've converted this to the rectangle. The other item that we have not touched on yet is the Split command. The Split command comes in handy most often when you have overlapping profiles. Let me show you what I mean. If I draw another rectangle that overlaps, or perhaps I'll even draw a circle that overlaps here. I now have a stack of geometry that Inventor can evaluate as profiles when we go to create a 3D feature.

Let me finish this sketch and I'm going to right-click in the Graphics window and select Extrude. Now, the way Inventor works is it gives me the ability to select multiple profiles to Extrude. If I hover over this rectangle, you'll notice that I'm getting one full rectangle. Same with this one, same with the circle. Now, I've seen, if I want this overall shape to look this way, I can select each of these items and you'll see that I get all the full outline of that profile.

If I do that again, there's also other profiles here that we could potentially use. Because these lines overlap on these rectangles and of this circle, Inventor is not seeing an intersection point at these points where they overlap, because of the way we drew the geometry. The Split command can fix that. If we edit the sketch by double-clicking on the sketch in the browser, we can go up to the Modify panel and select Split. And, when we hover over any geometry, it's going to follow the geometry around until it hits another line and provide indicators shown here as right axis on where the line could be split.

By doing that, Inventor is going to use these points where the line is split to define different profiles. I'm going to go ahead and select the bottom of the circle and it doesn't matter if you pick the bottom or the top because you're going to get the same result. But I'm also going to go down here and select this line. And, I'm going to select this line, which means I now have, if I get out of this command by right-clicking and selecting OK, or you can right-click and select Cancel, or you can hit Escape on you keyboard. All three do the exact same thing. But now, if I hover over the geometry, you'll see that it's essentially broken this into multiple pieces of geometry.

And I can drag this, it's still connected, technically, it just has an intersection point that happens right here, and at the intersection of where the circle and the rectangles connect. And the reason I wanted to show that is now if I finish the sketch, right-click in the graphics window and select Extrude, you'll find that Inventor has split that up into multiple profiles and I could choose to do a series of pieces and leave certain ones out. In this case, it's not exactly what we want, but I just wanted to show how the overlapping of those profiles is a good place where Split might be used.

Once you know that you have that, it might change the way you design geometry or the way you sketch geometry, in order to speed up your design process.

Show transcript

This video is part of

Image for Inventor 2014 Essential Training
Inventor 2014 Essential Training

90 video lessons · 3773 viewers

John Helfen
Author

 
Expand all | Collapse all
  1. 1m 24s
    1. Welcome
      47s
    2. Using the exercise files
      37s
  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
      42s
    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
      30s

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