Engineering 1182 FeatureBased Modeling Part Editing College of

• Engineering 1182 Feature-Based Modeling Part Editing College of Engineering Education Innovation Center Rev: 20140122, AJP Feature Based Modeling 1

• Engineering 1182 Feature-Based Modeling • Break down into Features • Series of Steps • 1 st Step: Base Feature • Adding / Subtracting Material • Edge Features Rev: 20140122, AJP Feature Based Modeling 2

• Engineering 1182 Breaking it Down into Features • Objects can be thought of in terms of features • • Feature Modeling Example Shapes Holes Rounds Etc. • Determines design strategy Rev: 20140122, AJP Feature Based Modeling 3

• Engineering 1182 Example Construction 1 We can think of the block in terms of 2 “L” shapes and then cut out the hole Rev: 20140122, AJP Feature Based Modeling 4

• Engineering 1182 Example Construction 2 We can think of the block in terms of a “C” shape and then add the plank with a hole Rev: 20140122, AJP Feature Based Modeling 5

• Engineering 1182 Example Construction 3 Finally, we could draw the overall shape from the top view and remove unwanted material Rev: 20140122, AJP Feature Based Modeling 6

• Engineering 1182 Series of Steps • Base Feature • First Extrusion or Revolve • Reduce Steps of Construction • Features • Additions or subtractions from original base feature Rev: 20140122, AJP Feature Based Modeling 7

• Engineering 1182 Edge Features Fillets create rounded edges Rev: 20140122, AJP Chamfers create slanted edges Feature Based Modeling 8

• Engineering 1182 Solid. Works Example: Piston Head How would you break this down into features? Where would you start? Rev: 20140122, AJP Feature Based Modeling 9

• Engineering 1182 Solid. Works: Base Feature There a couple ways to effectively model this piston head but for these slides we will start with a simple extrusion of a circle to create a cylinder Rev: 20140122, AJP Feature Based Modeling 10

• Engineering 1182 Solid. Works: Extruded Cut The volume will be removed using an extruded cut offset from the top surface Rev: 20140122, AJP Feature Based Modeling 11

• Engineering 1182 Solid. Works: Revolved Cut The piston rings will be cut out using a revolved cut Rev: 20140122, AJP Feature Based Modeling 12

• Engineering 1182 Solid. Works: Review Design Is there any other way that we could have reached this point and how many steps would it have involved? Would it be easier? Rev: 20140122, AJP Feature Based Modeling 13

• Engineering 1182 Solid. Works: Extruded Cut The pin hole and groove will be removed using an extruded cut Rev: 20140122, AJP Feature Based Modeling 14

• Engineering 1182 Solid. Works: Chamfer The top slanted edge will be added using a chamfer Rev: 20140122, AJP Feature Based Modeling 15

• Engineering 1182 Solid. Works: Fillet And finally the bottom edge of the head will be smoothed out using a Fillet (under the features menu) Rev: 20140122, AJP Feature Based Modeling 16

• Engineering 1182 Solid. Works: Finished Part This finished product can now be used in an assembly with other components shown here Rev: 20140122, AJP Feature Based Modeling 17

• Engineering 1182 Solid. Works: Design Tree The design tree on the left of the screen catalogs all the steps of creating this part and records the steps from top to bottom Rev: 20140122, AJP Sketches are absorbed into features but can be accessed by clicking the plus sign next to each feature Feature Based Modeling 18

• Engineering 1182 Solid. Works: Part Editing The design tree can be “rolled back” by clicking and dragging the blue bar at the bottom up and the features are no longer shown Rev: 20140122, AJP Feature Based Modeling New features can be added to this model in the middle of the design tree while other items are still “rolled back” 19

• Engineering 1182 Solid. Works: Altered Final Part These changes will also carry over to the assembly that contains the part When the design tree is restored then all the features return as long as changes do not interfere with previous features Rev: 20140122, AJP Feature Based Modeling 20

• Engineering 1182 Feature Based Modeling Wrap Up • • Recognize Features of Object Start with Base Feature Add or Remove Material in a series of steps Features to add last: Homework Problem 6. 4 (nn) – Fillets: Rounded edges – Chamfers: Slanted edges • Editing Features with Model Tree Rev: 20140122, AJP Feature Based Modeling 21

• Engineering 1182 In-Class Problem 6. 4 (p) & (u) Create the following shape according to the features and dimensions. (Hint: Add Fillets last) Rev: 20140122, AJP Feature Based Modeling 22