Copyright DASSAULT SYSTEMES 20021 Generative Shape Design V5R8 Update CATIA Training Foils Version 5 Release 8 January 2002 EDU-CAT-E-GSD-UF-V5R8. - презентация

1 Copyright DASSAULT SYSTEMES Generative Shape Design V5R8 Update CATIA Training Foils Version 5 Release 8 January 2002 EDU-CAT-E-GSD-UF-V5R8

2 Copyright DASSAULT SYSTEMES Course Presentation Objectives of the course In this course you will see the main enhancements in the Generative Shape Design workbench Targeted audience CATIA V5R7 users Prerequisites V5R7 CATIA Generative Shape Design 2 hour

3 Copyright DASSAULT SYSTEMES Table of Contents 1. Introduction to Generative Shape Designp.4 User Interface: Generative Shape Designp.5 2. Creating Wireframe Elementsp.6 Creating a Cornered Polylinep.7 Other Enhancement about Wireframep Creating Surface Elementsp.16 Creating an Offset Surfacep.17 Creating a Swept Surface: Smooth Sweepingp Performing Operationsp.20 Federating Elementsp.21 Applying an Axis-to-Axis Transformationp.27 Smoothing a Curve on a Supportp.31 Fillet Creation Enhancementsp.36 Other Enhancements about Operationsp.40

4 Copyright DASSAULT SYSTEMES The Generative Shape Design user interface You will become familiar with the Generative Shape Design Workbench. Introduction to Generative Shape Design

5 Copyright DASSAULT SYSTEMES User Interface: Generative Shape Design V5R8

6 Copyright DASSAULT SYSTEMES Creating a Polyline with Corners Other Enhancements : Creating a Spline Curve Creating a Connect Curve In this lesson you learn how to create some types of Wireframe Elements : Creating Wireframe Elements

7 Copyright DASSAULT SYSTEMES You will learn how to create a polyline including corners in one operation. Creating a Cornered Polyline V5R8

8 Copyright DASSAULT SYSTEMES Why create Cornered Polylines ? You can use this tool to create rapidly a polyline including corners : V5R8 Not using the point-point chain mode with corner tool : Using the line point-point chain mode with corners tool : Creating the lines point-point : n-1 operations Input data : 4 points Creating the corners : n+1 operations Triming the lines with the corners : n+5 operations Input data : 4 points Creating the polyline: 1 operation Whatever the number of point you want to use, only one operation is necessary to create the polyline.

9 Copyright DASSAULT SYSTEMES Lets see now how to create a Cornered Polyline... How to create a Cornered Polyline The federation of elements is available through the Join and the Extract tools : V5R8

10 Copyright DASSAULT SYSTEMES Select existing points. Creating a Cornered Polyline 3 Specify a radius for the intermediate points. 4 Click OK to confirm the cornered polyline creation. You can now create a polyline including corners V5R8

11 Copyright DASSAULT SYSTEMES You will learn other enhancements in the Wireframe Creation of the Generative Shape Design workbench Other Enhancement about Wireframe V5R8

12 Copyright DASSAULT SYSTEMES Creating a Spline Curve You can now use a curve to specify a tangency condition at a point of the spline Create the spline selecting existing points. 1 2 Select the point on which you want to add a tangency condition and expand the Parameters panel. 3 In the constraint type field, choose the new option From curve that allows you to choose a curve to add the tangency constraint. Now you can select a curve to specify the tangency constraint : V5R8 4 Note : the point of the spline must lie on the selected curve.

13 Copyright DASSAULT SYSTEMES Select the first curve to connect and a point on this curve. Creating a Connect Curve 4 If needed click on the red arrow located on either point to reverse the orientation of the associated curve, or use the dialog boxs new option. Curve 1 3 Select the second curve to connect and a point on this curve. Point 1 Point 2 Curve 2 Curve orientation Creating a connect curve, you have now the possibility to invert the orientation of the associated curve from the dialog box V5R8

14 Copyright DASSAULT SYSTEMES Select the two curves. Intersecting Elements : Type of created Elements (1/2) 3 Choose the type of element you want to generate. You can choose the type of elements that is created when you perform an intersection operation : V5R8 The type of element that was selected is created (in our exemple, it is a curve that is created).

15 Copyright DASSAULT SYSTEMES Intersecting Elements : Type of created Elements (1/2) Four different type of element can be generated : V5R8 - Points : when intersecting two curves or a curve and a surface. - Curves : when intersecting two curves or a curve and a surface. - Faces : when intersecting a surface with another or a surface with a pad. - Contours : when intersecting a surface with another or a surface with a pad.

16 Copyright DASSAULT SYSTEMES Creating an Offset Surface Creating a Sweep Surface In this lesson you learn how to create some types of Surface Elements : Creating Surface Elements

17 Copyright DASSAULT SYSTEMES Creating an Offset Surface 2 Select the reference surface and key in the offset value. Click OK to confirm the offset creation. If you want to create both side of the offset surface, choose the Check both side option. 3 4 You can now create both side of an offset surface with the same offset distance. Reference surface V5R8

18 Copyright DASSAULT SYSTEMES Creating a swept Surface : Smooth Sweeping (1/2) 2 Select the elements to create the swept surface. The guide curve contains a tangency discontinuity. Create the swept surface without using the smooth option and analyse its continuity : 3 When you create a swept surface using elements (curve or surface) with small tangency discontinuities, you can now smooth the resulting surface while creating it. Guide curve (the discontinuities are displayed) Profile The resulting surface contains a 0.41deg tangency discontinuity.

19 Copyright DASSAULT SYSTEMES Creating a swept Surface : Smooth Sweeping (2/2) 4 Edit the swept surface and activate the new option Smooth Sweeping. Go and check the analysis : the maximum tangency discontinuity has been lessened. 3 V5R8 Note : by default, the discontinuities under 0.5deg are taken in account. This option aims to generate better quality surfaces.

20 Copyright DASSAULT SYSTEMES Federating Elements Transforming Elements Axis-to-Axis Smoothing Curve on Support Creating Fillets Other Enhancements Splitting and Trimming: Intersection Computation Joining Surfaces: Angle Tolerance Healing Surfaces: Distance and Tangency Objective In this lesson you learn how to perform some Operations : Performing Operations

21 Copyright DASSAULT SYSTEMES You will learn how to federate elements while joining surfaces and extracting faces Federating Elements V5R8

22 Copyright DASSAULT SYSTEMES Why federate ? (1/2) 1- Surfaces are made of several faces. Elements created from a surface are in fact created from its faces. 2- A modification of the part geometry may lead to a change of the supporting face. The pad has been created with the option Up to surface, using the blue surface. A fillet have been added to the top edge of this pad. This edge depends on a face of the blue surface. The sketch supporting the pad have been modified so that the filleted edge does not lie anymore on the same face V5R8

23 Copyright DASSAULT SYSTEMES Why federate ? (2/2) 3- This change can lead to an update error because the elements created from these faces are no longer recognized. 4- Federating the faces of the surfaces, this kind of update error does not occur anymore. During the update of the part, an update error occurred : the filleted edge is not recognized : To solve the problem, you just have to federate the faces of the blue surface. Then the part is updated without any problem : V5R8

24 Copyright DASSAULT SYSTEMES Lets see now how to federate... How to Federate Elements The federation of elements is available through the Join and the Extract tools : V5R8

25 Copyright DASSAULT SYSTEMES Click OK to create the federated joined surface. 1 2 Select one by one the elements to be joined together. Federating Elements while Joining Surfaces 3 Expand the new Federation panel in the join dialog box. 4 Select one face of the join surface and choose a propagation type. 5 Joining surfaces, you have now the possibility to federate the faces of the resulting surface V5R8

26 Copyright DASSAULT SYSTEMES Click OK to create the federated extracted surface. 1 2 Select one face of the solid. Federating Elements while Extracting Faces 3 Choose a propagation type. 4 Activate the federation switch. 5 Extracting faces from a solid, you have now the possibility to federate the faces of the resulting surface V5R8

27 Copyright DASSAULT SYSTEMES You will learn how to perform an Axis-to-Axis transformation. Applying an Axis-to-Axis transformation V5R8

28 Copyright DASSAULT SYSTEMES What is an Axis-to-Axis transformation ? An Axis-to-Axis transformation transform geometry positioned according to an axis system into another axis system : V5R8 Reference Axis System Target Axis System Element to transform Transformed Element The green surface has been duplicated and positioned according to the new axis system.

29 Copyright DASSAULT SYSTEMES Lets see now how to apply an Axis-to-Axis transformation... How to apply an Axis-to-Axis transformation V5R8

30 Copyright DASSAULT SYSTEMES Click OK to create the transformed surface. 1 2 Select the element to transform. Applying an Axis-to-Axis transformation 3 Select the reference Axis System. 4 Select the target Axis System. 5 V5R8

31 Copyright DASSAULT SYSTEMES You will learn how to smooth on its support. Smoothing a Curve on a Support V5R8

32 Copyright DASSAULT SYSTEMES Why smoothing curve on a support ? (1/2) 1- Smoothing a curve that lies on a surface, you may obtain a curve that does not lie anymore on the surface. So you may not be able to use this smoothed curve properly : Trying to make a linear swept surface with reference surface using the smoothed curve as guide curve … … an error message occurs because the guide curve does not lie on the reference surface. V5R8

33 Copyright DASSAULT SYSTEMES Why smoothing curve on a support ? (2/2) 2- Using the new option Support surface while smoothing the curve, you make sure that the smoothed curve remains on the surface : Selecting a support surface … … the swept surface is correctly created because the smoothed curve now lies on the support surface. V5R8

34 Copyright DASSAULT SYSTEMES Lets see now how to smooth a curve on a support... How to smooth Curve on a Support V5R8

35 Copyright DASSAULT SYSTEMES Click OK to create the smoothed curve : it will lie on the surface. 1 2 Select the curve to smooth. Smoothing a Curve on a Support 3 Define the smooth parameters. 4 Select the support surface (the curve to smooth must lie on this surface). 5 Smoothing a curve, you have now the possibility to select a support surface. V5R8

36 Copyright DASSAULT SYSTEMES You will learn the enhancements about the fillets creation. Fillet Creation Enhancement V5R8

37 Copyright DASSAULT SYSTEMES Creating Shape Fillets : Hold Curve and Spine Creating Shape Fillets, you can now choose a curve sketched on one of the support to be connected to control the radius variation. Select the supporting faces Select the shape fillet icon. V5R8 Spine Curve Hold Curve Click OK to create the fillet surface : Select a hold curve lying on one support to drive the fillet radius, And a spine curve. 3 Note : the result is a variable radius fillet whose radius is driven by the hold curve.

38 Copyright DASSAULT SYSTEMES Creating Shape Fillets : trim first or second support (1/2) You can now trim only the first or the second support of a shape fillet. Select the two support surfaces. 1 2 Choose the support you want to trim. By default, the two support will be trimmed. V5R8 3 Type in the fillet radius and select the fillet parameters. 4

39 Copyright DASSAULT SYSTEMES Creating Shape Fillets : trim first or second support (2/2) Four combinations are possible : No support are trimmed Both support are trimmed The second support is left unchanged. Only the first support is trimmed. The first support is left unchanged. Only the second support is trimmed. V5R8

40 Copyright DASSAULT SYSTEMES You will learn other enhancements in the Operations of the Generative Shape Design workbench Other Enhancement about Operations V5R8

41 Copyright DASSAULT SYSTEMES Splitting and Trimming : Intersection Computation While splitting or trimming elements, you can now compute their intersection. Select the elements you want to trim or to split : 1 2 You can now compute the intersection while performing the split or trim operation. 3 V5R8 The elements intersection is computed and the intersection is added in the tree.

42 Copyright DASSAULT SYSTEMES Joining Surfaces : Angle Tolerance While joining surfaces, you can specify an angle tolerance. If the angle value on the edge between two elements is greater than the Angle Tolerance value, the elements are not joined Select the elements to be joined. The tangency discontinuity between these surfaces is 6deg : 1 2 V5R8 3 Click OK to confirm the join creation. 4 Activate the new option Angle Tolerance. CATIA refuses to create the join surface because the tangency discontinuity between the surfaces is greater than the specified angle tolerance:

43 Copyright DASSAULT SYSTEMES Healing two surfaces, you have now the possibility to allow a remaining gap or a remaining tangency discontinuity between the surfaces. Healing Surfaces : distance and tangency objective Select the surfaces to heal : 1 2 If you should decide to allow a remaining gap between the surfaces, key in the maximum tolerated value of this gap. Then CATIA inform you about the value of the remaining gap : mm gap Key in a merging distance superior to the gap value. V5R8 The same option is available concerning the tangency continuity type healings.