1. Chapter 3 Creating and Editing Sketched Features

2. Chapter 3 - Objectives
After completing this chapter, you will be able to perform the following:
Understand what a feature is
Understand Autodesk Inventor browser
Use direct manipulation techniques to create and edit a part
Extrude a sketch into a part
Revolve a sketch into a part
Edit features of a part
Edit the sketch of a feature
Make an active sketch on a plane
Create sketched features using one of three operations: cut, join, or intersect
Project edges of a part

3. Understanding Features
Describing Features
Sketch into a 3D feature
Base feature
Placed features
Edited, deleted, or reordered
Consumed and Unconsumed Sketches
Unconsumed sketch
not yet been used in a feature
Profiles
Feature consumes the profile
Consumed sketch

4. Use Browser to Create and Edit
Autodesk Inventor Browser
Default names
Extrusion1
Revole1
Locate parts and features
Resized while docked
Close Browser
Right-click
Double-click

5. Switching Environments
Sketch & Part environment
Tab changes automatically
Commands available for current environment

6. Model Commands Commands Model environment Model tab
Right-click in graphics window
Extracting iFeatures and iPart Author have been moved to the Tools Pulldown –due to frequency of use. You may customize the PanelBar through the right mouse context menu item “Customize…” when over the toolbar. Just use the Commands tab in the part category and you may drag the item to the panelbar.

7. Direct Manipulation Mini-Toolbars In-Canvas Display Sketch Face Edge
Dialog box information

8. Extruding a Sketch Extruding a Sketch Depth along Z-axis Preview
Extrude dialog box
Profile
Multiple closed profiles
Solids
Operation
Extents
Distance value
Direction

9. Extruding a Sketch Extruding a Sketch Operation Extents Direction
Join = adds
Cut = removes
Intersect = common
Solid = new solid body
Extents
Distance
To Next To
Between
All
Direction

10. Extruding a Sketch Extruding a Sketch Output More Solid Surface Taper
Alternate solution
Minimum solution
Infer iMates
Alternate solutions allows the user to choose between two possible logical solutions when multiple solutions to an extrusion exist. The logic of the alternate solution toggles the user between minimum and maximum material results (minimum being the default –top image displayed above).

11. Exercise 3-1
Extruding a Sketch

12. Revolving a Sketch Revolving a Sketch Create cylindrical parts
Revolve sketch around a straight edge or axis
Shape
Profile
Axis
Operation
Join
Cut
Intersect
Solid
Extents
Full, Angle, To Next,
To, Between, Full
Output
Surface

13. Revolving a Sketch More Tab Alternate solution Minimum solution
Infer iMates
Alternate solutions allows the user to choose between two possible logical solutions when multiple solutions to an extrusion exist. The logic of the alternate solution toggles the user between minimum and maximum material results (minimum being the default –top image displayed above).

14. Revolving a Sketch Centerlines & Linear Diameter Dimensions
Specify linear diameter dimensions
Quarter section
Place diameter dimensions
Changed to normal line to centerline

15. Exercise 3-2
Revolving a Sketch

16. Editing a Feature Editing a Feature
Feature consumes all the dimensions
To edit sketch or feature
Dimensions values
Taper
Operation
Termination
Output
For base features, everything can be changed except the join operation
Feature Priority (Select Features)

17. Editing a Feature Editing a Feature’s Sketch Add & remove objects
Adding geometry, lines, arcs, circles and splines
Delete geometry

18. Editing a Feature 3D Grips Used to push or pull the faces
Extruded feature
Revolved feature
Sweep feature
Red = Cut operation,
Green = Joined operation
Blue = Intersect operation

19. Editing a Feature Editing a Feature Renaming Features and Sketches
Default name
Locate
Descriptive to your design intent
Rename, slowly double-click
Feature Color
Feature Properties dialog box

20. Deleting a Feature Editing a Feature Deleting a Feature
Failed Features
Browser turns Red, an alert
Not successfully regenerated
Edit
Undo

21. Exercise 3-3
Editing Features and Sketches

22. Sketched Features Sketched Features You sketch on a plane
Add or remove material from the part
Needs it’s own plane (planar face or based on a work plane)
Use natural planar faces of the part or the default Origin planes of the part to create the sketch plane

23. Defining the Active Sketch Plane
Each sketch must exist on its own plane
Requirements to assign a plane
Inventor Part
Part active
Planar face or Work plane
Make a sketch active
Face Cycling
Dynamic face highlighting
Help select the correct face
Select Other tool
Time delay
Select Other is also available through the Context Menu if you don’t want to wait for the time delay during hover or if the glyph does not seem to be appearing.

24. Slice Graphics Slice Graphics Active Sketch Obscuring the view
Plane that is difficult to see
Temporarily slice away
Parts or assemblies
Technical Note
The sliced graphics texture can cause performance issues on some machines. Go to Tools>Application Options>Colors and deselect Show Reflections and Textures. This will turn off display of reflections and color styles that use textures.

25. Exercise 3-4
Sketch Planes

26. Projecting Part Edges Projecting Part Edges
Building parts partially based on existing geometry
Reference faces, edges, or loops
Associative link
Direct Model Edge Referencing
Automatically project edges
Create dimensions and constraints
Control the automatic projection

27. Projecting Part Edges Projecting Part Edges
Creating Reference Geometry
Move the cursor over an edge
Click an edge
Reference edges
Project Loop and Chain Option
Project Geometry tool
Edges
Loops
Faces
Break Link
Try to avoid creating projected loops (disjoint) that may merge in later edits –this will lead to the loops failing.

28. Applying Your Skills
Skill Exercise Skill Exercise 3-2 Skill Exercise 3-3

29. Checking Your Skills What is a base feature?
True_ False_ When creating a feature with the Extrude or Revolve command, you can drag the sketch to define the distance or angle.
Which objects can be used as an axis of revolution?
Explain how to create a linear diameter (diametric) dimension on a sketch.
Name two ways to edit an existing feature.
True_ False_ Once a sketch becomes a base feature, you cannot delete or add constraints, dimensions, or objects to the sketch.
Name three operation types used to create sketched features.
True_ False_ A cut operation cannot be performed before a base feature is created.
True_ False_ Once a sketched feature exists, its extents type cannot be changed.
True_ False_ By default geometry that is projected from one feature to a sketch will update automatically based on changes to the original projected geometry.