Copyright DASSAULT SYSTEMES FreeStyle Shaper, Optimizer & Profiler CATIA Training Exercises Version 5 Release 8 February 2002 EDU-CAT-E-FSS-FX-V5R8
Copyright DASSAULT SYSTEMES Table of Contents 1. Master exercise 1: Hairdryer, surface approachp.3 Step 1: Create the body of the hairdryerp.6 Step 2: Create the handle of the hairdryerp.10 Step 3: Blend the body and the handlep.15 Step 4: Global modification, offset, symmetryp Master exercise 2 : Hairdryer, curve approachp.23 Step 1: Create the body of the hairdryerp.26 Step 2: Create the handle of the hairdryerp.33 Step 3: Blend the body and the handlep.39 Step 4: Adjust shape through associativityp.44
Copyright DASSAULT SYSTEMES Master Exercise 1 Hairdryer, surface approach In this exercise you will learn how to design a new model of hairdryer from scratch, straight from the design idea you have in mind. You will use a surface based approach. 2 hrs.
Copyright DASSAULT SYSTEMES Design Intent: Hairdryer Create high quality surfaces Ensure good connections between surfaces Ensure symmetry of the model Create a nice design Body Blend surface Handle
Copyright DASSAULT SYSTEMES Design Process: Hairdryer, surface approach 1. Create the body of the Hairdryer 2. Create the handle 3. Blend body and handle 4. Global modification, Create offset and symmetric surfaces
Copyright DASSAULT SYSTEMES Master Exercise 1 Hairdryer (Step 1): Create the body of the hairdryer The body is created with from a simple basic surface, the shape is given by moving the control points. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Create the basic rectangular surface with the desired dimensions (about 250 x 130 mm, for instance) Planar patch
Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Modify the shape of the basic surface in a top view (XY plane) Control points Modify the shape of the basic surface in the Z direction, change the order to increase the flexibility Control points
Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Project sides to Z=0 plane if needed Control points Impose vertical tangencies on the sides of the surface Extrusion Match
Copyright DASSAULT SYSTEMES Master Exercise 1 Hairdryer (Step 2): Create the handle of the hairdryer The handle is created with a similar approach. But it has to be created in several steps because of the grip shape. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/4) Create the starting rectangular surface Planar patch Modify the shape in a top view Control points
Copyright DASSAULT SYSTEMES Do It Yourself (2/4) Modify the shape in the Z direction Control points Restore side planarity and vertical tangencies Control points Extrusion Match
Copyright DASSAULT SYSTEMES Do It Yourself (3/4) Extract 4 sections of the surface Geometry extraction Modify the extracted surfaces to give them the desired shape Control points
Copyright DASSAULT SYSTEMES Do It Yourself (4/4) Blend the for surfaces FreeStyle Blend Surface
Copyright DASSAULT SYSTEMES Master Exercise 1 Hairdryer (Step 3): Blend the body and the handle Once the limit curve of the blend surface on the body has to be designed, the blend can be done in a surface based approach using the blend function but could also be done in a curve based approach using the FreeStyle Sweeps or Nets. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Create the limit curve on the surface of the body Curve on Surface Give curve vertical end tangent directions Stretch view Control points
Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Cut the surface Break surface Create the blend surface FreeStyle Blend curves Extrude Fill
Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Quality analysis Isophotes analysis Environment mapping Cutting planes Connect checker
Copyright DASSAULT SYSTEMES Master Exercise 1 Hairdryer (Step 4): Global modification, offset, symmetry Some global operations can now be applied to the model such as a global shape modification, the creation of the inner skin and the creation of the symmetric part. Shape quality analysis is also an important issue in style design. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Modify the shape of the hairdryer (design change) Global modification Create the inner skin Offset
Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Create the symmetric part of the model Symmetry Check continuity between symmetric sides Connect checker
Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Analyze the quality of the model Isophote analysis Environment mapping Cutting planes Reflection lines
Copyright DASSAULT SYSTEMES Master Exercise 2 Hairdryer, curve approach In this exercise you will redesign the same hairdryer using a curve based approach: surfaces are created from curves and can be modified by modifying the input curves thanks to associativity. 3 hrs.
Copyright DASSAULT SYSTEMES Design Intent: Hairdryer Create high quality surfaces Ensure good connections between surfaces Ensure symmetry of the model Create a nice design Keep associativity between starting curves and created surfaces Body Blend surface Handle
Copyright DASSAULT SYSTEMES Design Process: Hairdryer, curve approach 1. Create the body of the Hairdryer 2. Create the handle 3. Blend body and handle 4. Adjust the shape by modifying the curves
Copyright DASSAULT SYSTEMES Master Exercise 2 Hairdryer (Step 1): Create the body of the hairdryer The body is created from simple curves, the shape can be modified afterwards at any time by modifying the curves. 3 hrs.
Copyright DASSAULT SYSTEMES Do It Yourself (1/6) Create the first 2 curves in the XY plane, make sure the end points are in the same X plane (same value for the X coordinate, for example –75 and + 75) 3D curve
Copyright DASSAULT SYSTEMES Do It Yourself (2/6) Create a third curve in plane Z=0 between the other 2 curves 3D curve Modify the shape of the third curve in the Z direction (change view and privileged plane) 3D curve
Copyright DASSAULT SYSTEMES Do It Yourself (3/6) Create the section profile through curve end points 3D curve Impose vertical tangencies on the end points and an horizontal tangency on the middle point of the section profile 3D curve
Copyright DASSAULT SYSTEMES Do It Yourself (4/6) Create vertical side surfaces to define a vertical tangency constraint; use Extrude function of GSD to preserve associativity Extrude Create an horizontal surface on the intermediate curve to define an horizontal tangency contraint (again with GSD Extrude) Extrude Hide the first three curves
Copyright DASSAULT SYSTEMES Do It Yourself (5/6) Create the first surface of the body tangent to the extrusion surfaces (Sweep & Fit with Moving frame by Translation) FreeStyle Sweep Create the second part of the body tangent to the last extrusion surface and the previous sweep surface FreeStyle Sweep
Copyright DASSAULT SYSTEMES Do It Yourself (6/6) Check that the tangency continuity between the surfaces is within the system tolerance (less than 0.5 degrees) Connect checker Redisplay the 4 curves and modify them: the surfaces are updated and the tangency constraints are preserved 3D curve
Copyright DASSAULT SYSTEMES Master Exercise 2 Hairdryer (Step 2): Create the handle of the hairdryer The handle is created with a similar approach but one of the side curves must include the shape of the grip. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/5) Create the side curves of the handle in plane XY (end points with same Y coordinate values) 3D curve Create the intermediate curve in XY plane then pull it in Z direction 3D curve
Copyright DASSAULT SYSTEMES Do It Yourself (2/5) Create 4 equidistant points on the first curve of the handle; use GSD function to preserve associativity Points and planes repetition Create curves between the points to simulate the grip shape 3D curve
Copyright DASSAULT SYSTEMES Do It Yourself (3/5) Split the handle side curve to the first arc of the grip; use GSD Split command to preserve associativity Split Insert FreeStyle fillets at each sharp corner of the grip shape (radius 3mm) Styling corner
Copyright DASSAULT SYSTEMES Do It Yourself (4/5) Create the handle section profile curve with vertical tangencies at both ends and horizontal tangency at the intersection with the intermediate curve 3D curve Create the extrusion surfaces that give the tangency constraints; use GSD function to preserve associativity Extrude
Copyright DASSAULT SYSTEMES Do It Yourself (5/5) Create the first surface of the handle by sweeping; you can use a limit point to choose the length of the handle FreeStyle sweep Create the other side of the handle; choose the same limit point as for the first surface FreeStyle sweep
Copyright DASSAULT SYSTEMES Master Exercise 2 Hairdryer (Step 3): Blend the body and the handle The blend surface is created with a FreeStyle Net. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/4) Create the curve which defines the contact between the body and the blend surfaces; create it in XZ plane, with vertical end tangent directions 3D curve Project this curve to the surface of the body and cut out the unnecessary part; use GSD functions to preserve associativity Project Split
Copyright DASSAULT SYSTEMES Do It Yourself (2/4) Create the side curves of the blend surface; use GSD connection tool to preserve associativity Connect Curve Join the surfaces of the handle to get only one surface Join Create the extrusion surfaces which give the vertical tangency constraints Extrude
Copyright DASSAULT SYSTEMES Do It Yourself (3/4) Create the blend surface in FreeStyle with tangency constraints on 4 sides FreeStyle Net
Copyright DASSAULT SYSTEMES Do It Yourself (4/4) To improve the shape of the surface you can add more profiles or guides: for example create middle points on the side curves, connect them with a 3D curve and use the curve as an additionnal guide Point 3D curve FreeStyle Net
Copyright DASSAULT SYSTEMES Master Exercise 2 Hairdryer (Step 4): Adjust shape through associativity Now thanks to associativity the shape of the model can be modified by editing any of the input curves. 30 min.
Copyright DASSAULT SYSTEMES Do It Yourself (1/3) Create the symmetric part of the hairdryer Symmetry Turn off the automatic update option for better performances Tools/Options/Shape
Copyright DASSAULT SYSTEMES Do It Yourself (2/3) Double-click any 3D curve and move a point to modify the shape 3D curve Update the model Update
Copyright DASSAULT SYSTEMES Do It Yourself (3/3) Other example: double-click a connection curve and change the tensions Connect Curve Update the model Update
Copyright DASSAULT SYSTEMES End of the exercise