Copyright DASSAULT SYSTEMES Quick Surface Reconstruction CATIA Training Exercises Version 5 Release 8 March 2002 EDU-CAT-E-QSR-FX-V5R8

Copyright DASSAULT SYSTEMES Table of Contents 1. Plastic bottlep.3 Creating scansp.6 Creating curvesp.9 Creating surfacesp.13 Creating the rough modelp.17 Filleting the modelp Washing powder bottlep.22

Copyright DASSAULT SYSTEMES Master Exercise Plastic bottle In this exercise, you will learn how to rebuild a surface model on a digitized mock up. 2 h.

Copyright DASSAULT SYSTEMES Design Intent: Plastic bottle The surface should be at 0.5 mm max from the point Radius for small fillets is 2mm Radius for bottom fillet has to be retrieved

Copyright DASSAULT SYSTEMES Design Process: Plastic Bottle Creating scans 1 Creating curves 2 Creating surfaces 3 trimming surfaces 4

Copyright DASSAULT SYSTEMES Master Exercise Plastic Bottle (Step 1): Creating scans During this step, you will create scans from the digitized data by an isoslope computation and by planar sections. 15 min.

Copyright DASSAULT SYSTEMES Do It Yourself (1/2) Create a scan at the symmetry plane Create a scan using the isoslope computation Scan should be the apparent contour of the bottle when looking in the X direction Create a scan below the top fillet Load: exercise_start.CATPart

Copyright DASSAULT SYSTEMES Do It Yourself (2/2) Create a scan above the bottom fillet

Copyright DASSAULT SYSTEMES Master Exercise Plastic Bottle (Step 2): Creating curves During this step, you will create curves on the digitized data by smoothing the scans created in step 1 and blending them. 45 min.

Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Create curves on the scan in symmetry plane Curve should be at 0.5mm max from the points Impose splitting points as shown Load: end_step1.CATPart

Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Create a curve on the isoslope scan Curve should be at 1mm max from the points Create the curve on the body of the bottle only Create curves on the two last scans Curves should be at 0.5mm max from the points

Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Trim all the created curves Blend the curves in the symmetry plane in the handles area

Copyright DASSAULT SYSTEMES Master Exercise Plastic Bottle (Step 3): Creating surfaces During this step, you will create surfaces on the digitized data by identifying some canonical shape and creating free form surfaces 30 min.

Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Create tangency constraints by extruding the curves in the symmetry plane in the Y direction Create a tangency constraint along the apparent contour by extruding the curve in the X direction Create a first surface on the body Surface should be at 0.5mm max from the points Load: end_step2.CATPart

Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Create a second surface on the body Surface should be at 0.5mm max from the points Create a cylinder at the top of the bottle Cylinder axis is Z Reduce the cylinder to the part necessary for the model Create a planar surface between body and top

Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Create a planar surface on the bottom of the bottle Plane normal should be Z Create a free form surface on the left handle Surface should be at 0.5mm max from the point Extrapolate the surface to make it intersect the bottle body Create a free form surface on the right handle Surface should be at 0.5mm max from the point Extrapolate the surface to make it intersect the bottle body

Copyright DASSAULT SYSTEMES Master Exercise Plastic Bottle (Step 4): Creating the rough model During this step, you will complete the model by extrapolating and trimming surfaces. 15 min.

Copyright DASSAULT SYSTEMES Do It Yourself (1/2) Join the body surfaces Create top and bottom boundaries of the joined surface Extrapolate the join surface in +Z and –Z direction to get intersection with the surrounding surfaces Load: end_step3.CATPart

Copyright DASSAULT SYSTEMES Do It Yourself (2/2) Split the elements by the ZX plane Trim all the elements

Copyright DASSAULT SYSTEMES Master Exercise Plastic Bottle (Step 5): Filleting the model During this step, you will complete the model by filleting surfaces. 15 min.

Copyright DASSAULT SYSTEMES Do It Yourself Create two 2 mm fillets on the top of the bottle Create two 2 mm fillets around the handles Determine the radius of bottom fillet Create a fillet at the bottom of the bottle Load: end_step4.CATPart

Copyright DASSAULT SYSTEMES Exercise Washing powder bottle Starting from the cloud of points, rebuild the full model using mainly a network approach 2 h.

Copyright DASSAULT SYSTEMES Design Intent: Washing powder bottle Surfaces should be at 0.5 mm max from the points

Copyright DASSAULT SYSTEMES Design Process: Washing powder bottle Import and filter the cloud of points 1 Tessellate the cloud of points 2 Create a network of curves 3 Fill the network of curves 3

Copyright DASSAULT SYSTEMES Do It Yourself (1/4) Import the cloud of points File to import is washing_powder.asc Filter the cloud of points Use an adaptative filter for the body Refine filtering on the bottom using an homogeneous filter Load: washing_powder.asc

Copyright DASSAULT SYSTEMES Do It Yourself (2/4) Tessellate the cloud of points

Copyright DASSAULT SYSTEMES Do It Yourself (3/4) Create scans on the tessellation Create a network of curves

Copyright DASSAULT SYSTEMES Do It Yourself (4/4) Fill the network with surfaces Create canonical surfaces where needed