This is an opportunity to show what you know about Inventor. This is not intended to be a fully detailed instruction but more of a road map to get you started a give some direction. This is part 3 of a 6 part project. Please see the attached file for details.
Step 1: Set Sheet Metal Styles and Standards
Set Sheet Metal Styles and Standards according to the drawing.
Step 2: Create a Sketch and a Contour Flange
Create a 2d sketch and a "Contour Flange" to develop the base.
Step 3: Unfold the Item
We must unfold the item to perform work on the flat pattern. Use the "UnFold" command.
Step 4: Create a 2D Sketch and Cut the Center Air Hole
Create a 2D sketch and cut the center air hole. In the sketch you should incorporate points for the anchor holes aswell.
Step 5: Pattern the Air Holes As Required
Create 2 patterns to achieve the required amount of holes and spacing.
Step 6: Create Anchor Holes
Create the holes for the anchor rods.
Step 7: Refold the Part
Use the "ReFold" feature to refold the part to its rolled state.
Step 8: Create Mounting Holes
Create a 2D sketch on a side face and layout the points as required. Use the Hole feature to create the mounting holes.
Step 9: Create the Flat Pattern
Once the part is complete create the flat pattern.