Continuing Study of the Modeling “Add-ins” IE 1225 – Introduction to Design and Manufacturing R. Lindeke

Shafting – adding a closed rotation feature  Always consider designing to the Axis of Rotation  These profiles can be open or closed  If Closed, the shape (line) of closure must not intersect the axis of rotation or the shape will fail!  If the profile is open, it must terminate at the axis of rotation or the operation will also fail!

Grooving – subtracting a profile by revolving about an axis  Same issues as in shafts  Consider 3-D elements – and their projection (we’ve used them before and always will!) 3-D Edges 3-D Silhouettes Projections to the drawing plans  Always remember the “tools of the trade” as we sketch and model! But be careful and don’t “overdo” it either!

Draw and Constrain the PROFILE: Be sure to use the profile data entry set for lines – its easy because the lines are essentially straight Vertical or Horizontal

Leads to This:

We build a “Thick” (thin!) half (180) Reversed Shaft

I found that to get the Rectangle Positioned, Constraining the Bottom to the Top of Shaft worked better!

180 and Reverse Direction!

Sketching for the Groove: NOTE: Cut Object by Sketching Plane:

Click Thick Profile and MORE to set “thinness”

Right Click to Find Axes options!

Note: Circle is on Center Axis!

Final Product:

Creating “Lofted Parts”  LOFTS (from the aircraft design background of CATIA’s developers!) are SWEPT surfaces that join 2 or more planer surfaces ALONG a SPINE  RIBS are additive profiles also swept along a CENTER Curve to create Features  SLOTS are subtractive profiles also swept along a CENTER Curve to remove material from a body

Again Right-Click in Option boxes to view choices (for desired Planes here)!

Over and Over … Before Projecting the 3-D Elements – Choose both Arc and Line – then indicate 3-D elements Select Both Projected Elements before “SCALING” Change the Projections into Construction Elements after Scaling

Eventually we get to here:

After the 1 st “Multi-sections Solid” (Loft) is performed Note: When doing the 2 nd half of the lofting, Choose Sketch 1 in Part Tree to begin the lofting group!

Pick the Top Face of the Lofted Halves The “SHELL” Icon:

Sketch 3-D Elements on Rt. End of Boat – use this face to offset a plane …

Desired End Shape: It will MOST LIKELY require you to zoom and click on Point 2’s Arrow (as the author suggests)

Double Check – when projecting edges that all Points are included in the Projection Elements! – and don’t be afraid to Zoom … Zoom … Zoom!

After we create the groove, we add Ribbing and isolated the 3-D projection of “Sketch 2” to get the center curve

Be Sure to Select Arc & Upper Curve to set Tangency!

Adding Stiffener “From Top” On plane 4 toward stern

To build Seat – I used a Pad and Then a Mirrored Pad for the Stiffener!