Catia草图设计教程

1、Copyright DASSAULT SYSTEMES 2002,1,Sketcher,CATIA Training Exercises,Version 5 Release 9June 2002 EDU-CAT-E-SKE-FX-V5R9,Copyright DASSAULT SYSTEMES 2002,2,Table of Contents,Sketching Simple Profiles : Recap Exercisep.3 Sketching Pre-Defined Profiles : Recap Exercisep.6 Editing Profiles : Recap Exerc

2、isep.8 Operations on Profiles : Recap Exercise p.10 Setting Constraints : Recap Exercise I p.12 Setting Constraints : Recap Exercise II p.14 Managing Sketches : Recap Exercise p.16 Master Exercise: Gasket Presentationp.18 Master Exercise: Gasket (Step 1)p.21 Master Exercise: Gasket (Step 2) p.24 Mas

3、ter Exercise: Gasket (Step 3) p.26 Master Exercise: Gasket (Step 4) p.28 Master Exercise: Gasket (Step 5) p.30 Master Exercise: Gasket (Step 6) p.35,Copyright DASSAULT SYSTEMES 2002,3,Exercise,Sketching Simple Profiles: Recap Exercise Create a simple profile made up of Lines, a Spline, an Arc, and a

4、n Axis Extra Credit : Create a solid of revolution from your profile and shell it,5 min.,Copyright DASSAULT SYSTEMES 2002,4,Do It Yourself (1/2),Sketching Simple Profiles,1- Lines 2- Spline 3- Arc 4- Axis,Pt5,Copyright DASSAULT SYSTEMES 2002,5,1- Lines 2- Spline 3- Arc 4- Axis,Load: CATSKE_Ex_Recap_

5、Sketching_Simple_Profile.CATPart,Do It Yourself (2/2),Sketching Simple Profiles,Copyright DASSAULT SYSTEMES 2002,6,Exercise,Sketching Pre-Defined Profiles Recap Exercise Create two Pre-Defined profiles - a Hexagon and a Keyhole Extra Credit : Extrude a solid Pad from your profile Create two Pre-Defi

6、ned profiles - a Hexagon and a Keyhole Extra Credit : Extrude a solid Pad from your profile,10 min.,Copyright DASSAULT SYSTEMES 2002,7,Do It Yourself,Create these profiles by freehand Optional: Please check with your Instructor if you have any questions on how to create a pad from your profile,Pt1,L

7、oad: CATSKE_Ex_Recap_Sketching_Predefined_Profiles.CATPart,Copyright DASSAULT SYSTEMES 2002,8,Exercise,Editing Profiles : Recap Exercise Create a Rectangle Modify the rectangular profile,Surfaces,10 min.,Copyright DASSAULT SYSTEMES 2002,9,Do It Yourself,Create these profiles by freehand 1- Create th

8、e Rectangle 2- Modify the length and width of the rectangle by dragging lines 3- Modify the entire shape of the rectangle by dragging its endpoints,Pt1,Load: CATSKE_Ex_Recap_Editing_Profile.CATPart,Copyright DASSAULT SYSTEMES 2002,10,Exercise,Operations on Profiles : Recap Exercise Design in Context

9、 Project 3D Elements into your Sketch Trim your profile with Corners and Chamfers,Surfaces,15 min.,Copyright DASSAULT SYSTEMES 2002,11,Do It Yourself,In order to get into your Sketch plane: Select the Sketcher Icon and the plane 1- Project the Splines from the Supports 2- Draw two horizontal lines p

10、assing through the projected Splines then trim them using the Corner and Chamfer tools 3- Optional: Extrude a Pad using your profile,Pt1,Load: CATSKE_Ex_Recap_Operations_On_Profiles.CATPart,Copyright DASSAULT SYSTEMES 2002,12,Exercise,Setting Constraints : Recap Exercise I Create constraints and dim

11、ension between the sketch and 3D geometry,15 min.,Copyright DASSAULT SYSTEMES 2002,13,Do It Yourself,Make the circle in your Sketch concentric to the cylinder on the Male part. Put a dimension on the circle. Dimension the rectangular profile with respect to the faces on the Male part Optional: Creat

12、e the Female Pad from your profile,Pt5,Pt1,Load: CATSKE_Ex_Recap_Setting_Constraints_1.CATPart,Copyright DASSAULT SYSTEMES 2002,14,Exercise,Setting Constraints : Recap Exercise II Study a mechanism using the Sketchers Animate Constraint tool,Wireframe,Surfaces,15 min.,Copyright DASSAULT SYSTEMES 200

13、2,15,Do It Yourself,Make the 62 degree angle vary from 62 to - 62 to study the constraints existing between the different geometrical elements,Pt5,Pt1,Load: CATSKE_Ex_Recap_Setting_Constraints_2.CATPart,Copyright DASSAULT SYSTEMES 2002,16,Exercise,Managing Sketches : Recap Exercise Create an Angled

14、Plane Change the Sketch Support of the part to this new plane,Surfaces,10 min.,Copyright DASSAULT SYSTEMES 2002,17,Do It Yourself,1- Create a plane at 45 Degrees to the XY plane using the line provided 2- Change the Sketch Support for Sketch.1 to this new plane,Pt1,Load: CATSKE_Ex_Recap_Managing_Ske

15、tches.CATPart,Copyright DASSAULT SYSTEMES 2002,18,Gasket: Presentation In this exercise you will have the chance to try out various tools for Sketching and Constraining by designing a profile for a Gasket. You will test the integrity of your Sketch by extruding the solid Gasket using the Pad tool fr

16、om the Part Design Workbench Finally, you will see how easy it is to modify a sketch,55 min.,Master Exercise,Copyright DASSAULT SYSTEMES 2002,19,Design Intent: Gasket,A Gasket is a part used to make a joint fluid tight. It can be made of rubber, foam, or other industrial polymers that conform to the

17、 contours of adjacent parts thus providing an airtight or liquid tight seal between the parts.,Copyright DASSAULT SYSTEMES 2002,20,Design Process: Gasket,Step 6: Replacing the Sketch,Sketching Pre-Defined Profiles,Editing Profiles,Performing a Symmetry,Fully Constrain the Gasket,Sketching Simple Pro

18、files,1,2,3,6,4,5,Copyright DASSAULT SYSTEMES 2002,21,Master Exercise,Gasket (Step 1) - Sketching Simple Profiles In this step you will: Set up the Sketching Mode Use Simple Profile tools to sketch half of the Gasket,10 min.,Copyright DASSAULT SYSTEMES 2002,22,Do It Yourself (1/2),Sketch the profile

19、 shown on the right. The outer profile should be sketched with one use of the Profile tool. The Sketching mode should be set so that only Horizontality, Verticality, and Tangency Constraints are automatically created. Place the circles roughly as shown. Turn off the automatic creation of Constraints

20、 and Dimensions when sketching the circles.,Load: CATSKE_Ex_Master_Step1.CATPart,Copyright DASSAULT SYSTEMES 2002,23,Do It Yourself (2/2),Hints: Go to Tools/Options/Part/Sketcher (in the Menubar) to set Grid Auto detection parameters Switch Sketching mode in the Tools toolbar,Copyright DASSAULT SYST

21、EMES 2002,24,Master Exercise,Gasket (Step 2) - Sketching Pre-Defined Profiles In this step you will: Add a slot on the Gasket,5 min.,Copyright DASSAULT SYSTEMES 2002,25,Do It Yourself,Sketch the slot in the location shown on the right using a Pre-Defined Profile tool. Set the sketching mode to autom

22、atically create Horizontality, Verticality, and Tangency constraints Save your model for the next step,Load: CATSKE_Ex_Master_Step2.CATPart,Copyright DASSAULT SYSTEMES 2002,26,Master Exercise,Gasket (Step 3) - Editing Profiles In this step you will: Edit the slot on the Gasket,5 min.,Copyright DASSA

23、ULT SYSTEMES 2002,27,Do It Yourself,Change the center of the top arc on the slot to H=0 and V=20 Change the center of the bottom arc on the slot to H=0 and V=-20 Save your model for the next step,Load: CATSKE_Ex_Master_Step3.CATPart,Copyright DASSAULT SYSTEMES 2002,28,Master Exercise,Gasket (Step 4)

24、 - Performing a Symmetry In this step you will: Create the symmetrical elements of the Gasket,10 min.,Copyright DASSAULT SYSTEMES 2002,29,Do It Yourself,Perform a symmetry operation on the outer profile and the two circles (Refer to previous page) in one step. Use AutoSearch to select the outer prof

25、ile then use the CTRL key to select the two circles Automatically create Symmetry Constraints (Hint: Turn on Dimensional Constraints Mode) Use the Search tool under Edit in the Menubar to select all the Symmetry Constraints and No-Show them. Save your model for the next step,Load: CATSKE_Ex_Master_S

26、tep4.CATPart,Copyright DASSAULT SYSTEMES 2002,30,Master Exercise,Gasket (Step 5) - Fully Constraining the Gasket In this step you will: Completely constrain the Gasket by using a combination of Geometric and Dimensional Constraints You will then create the actual solid Gasket using the Pad tool from

27、 the Part Design Workbench. Successfully creating a Pad will also help verify that your Sketch was correctly defined.,20 min.,Copyright DASSAULT SYSTEMES 2002,31,Do It Yourself (1/4),Create the Geometric and Dimensional Constraints shown on the next page. Create a Relation between the two 10 mm radi

28、us dimensions. Access the Pad tool in the Part Design Workbench and create a thickness of 5mm. for the Gasket. (Please check with the Instructor on where the Pad tool is located if you have trouble finding it) Save your model for the next step,Load: CATSKE_Ex_Master_Step5.CATPart,Copyright DASSAULT SYSTEMES 2002,32,Do It Yourself (2/4),Turn the page if you want Hints :,Copyright DASSAULT SYSTEMES 2002,33,Do It Yourself (3/4),Hints: You dont have to constrain the left side of the Gasket because the geometry there is alr