Continuing Study of the Modeling “Add-ins”

IE 1225 – Introduction to Design and ManufacturingR. 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 1st “Multi-sections Solid” (Loft) is performed

Note: When doing the 2nd 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!