Continuing Study of the Modeling Add-ins IE 1225 Introduction to Design and Manufacturing R. Lindeke & J. Voss 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 (weve 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 dont 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! Right Click to Find Axes options! Note: Circle is on Center Axis! Final Product: Creating Lofted Parts Lofts (from the aircraft design background of CATIAs designers!) 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 to Find options (for 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 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 Close Point 2s Arrow (as the author suggests) Double Check when projecting edges that all Points are Construction Elements! and dont be afraid to Zoom Zoom Zoom! Adding Rib We 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! Draft A tool for Making Patterns and Dies Drafted surfaces allow objects to be withdrawn from a certain direction They are needed if we are designing tooling for forging and casting We often use filleted edges to guarantee that metal from parts or sand will not stick in sharp corners in forging and casting Chamfers also help to release too! Use the Profile tool build using data entry as much as possible! Select Rt. Face of Part Select Draft Fill as suggested! Hold Down Control Key when selecting the Faces to Draft & the Top Faces as Neutral Elements Which Becomes this when only the Lowest Top Face is Specified as a Neutral Element! In Casting when we produce Patterns, we need a parting Plane to allow easy withdrawal We would likely Draft in Opposite Directions: both above and below this plane if we are building a real Matchplate Notice the Effected of Limited Draft on Front Face and the Pre-pocketed Rectangle When Creating Extra Planes Rt. Click on Points Selection box! When added notice it is 40 along the walls but only 10 across the center! The sizes in the Tutorial were High I found from Left/6.426 from Top Edges to be a better centering! When considering the Filleted edges! Make Sure the Rectangle are Coincident with the construction edges! Retain the Upper edge of the top step Making Edge-Kept Fillets Do it in 2 steps! When Limiting the Fillet by a plane you will likely need to Reverse the Arrow direction After Deleting Inside Draft and Then Pocket Sketch and Constrain the 2 Circles: Step 1: Draft the Cyl. Pads; Step 2: Face-to-Face Fillet the two Cones Finally a Variable Radius Fillet on the 2 Edges From 10 to 30 mm; And a Chamfered edge on the lower step!