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(Tutorial 4 – Rebuild P51 Mustang)
CATIA V5 Freeform Surfaces
Infrastructure
Sketcher
Freestyle (Surface-modeling)
Not For Commercial Use
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CATIA Freeform Surface-modeling
Tutorial 4A
- Create three Extrude surfaces, offsetting from X,Y,Z planes
- Apply reference pictures onto the three surfaces
- Create a sketch for each cross-section and then relocate them to the corresponding positions
Tutorial 4B & 4C
- Create 3D curves, then create Freeform surfaces
- First create the Body, then the Wing, and finally the Tail
- Create a symmetric model by mirroring the resultant surfaces by a reference plane
Please be reminded that this series of tutorials is designed to demonstrate a design
approach with CATIA, rather than the command itself.
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Tutorial 4A
- Create a Project Folder (e.g. C:/P51)
- Download the reference pictures from the web: http://www.youtube.com/dicksham
- p51-front.jpg
- p51-right.jpg
- p51-top.jpg (The pictures are square in shape, 1000x1000 pixels)
- Then Save them into the project folder
- Enter CATIA by double-clicking its icon on the desktop
- By default, a empty “Product” file is created. But now, you don‟t need this, just select “ File/Close ” on the menu
- Select „ Start/Shape/Generative Shape Design ”on the menu bar
- Uncheck “Enable Hybrid Design” and then click “ok”
- (An empty part is now created on “Generative Shape Design” workbench.)
Preparation
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Tutorial 4A
To create a Geometrical Set:-
- Select “Insert/ Geometrical Set” on the menu bar
- Type “Reference” as the name
- Click ok to complete
To create a Sketch:-
- Click “Sketch” icon and select “yz” plane
- Draw a vertical straight line on the left
- (Length ~ 120mm, Location ~100mm from origin)
- (Before clicking the 2nd^ point, refer to the L value on the toolbar “Sketch Tools” )
- Click Exit to complete
Length
Preparation
1 st^ point of the vertical line
2 nd^ point of the vertical line
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Tutorial 4A
To replace the texture by a picture:-
- Double-click “B&W Tiling” on the tree
- Select the tab page “Rendering”
- Click on the sub-tab page “Texture”
- Select “Image” as type
- Click “…” icon to select a picture file
- Select the file “ p51-right.jpg ” in your project folder
- Click “Open”
- (Now, the projection method is not correct to show the picture on the surface)
- Select “Cubical Mapping”
- Deselect U,V repeat
- Flip U
- Click ok to complete
result
Preparation
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Tutorial 4A
To create another sketch:-
- Click “Sketch” icon, then select “zx plane”
- Draw a vertical line on the left
(with one end touching x-axis)
- Click “Constraint” icon, then select the line
- Modify the length to 25.4mm (1inch)
- Click Exit to complete
To resize and relocate the reference picture:-
- Click “Right View” icon (or click “y” on the compass)
- Double-click “B&W Tiling” on the tree again
- Select the tab page “Rendering”
- Adjust the values “Scale U,V” and “Position U,V” until the scale 1-2 is nearly of the same height as Sketch.
- Keeping the Scale unchanged, adjust UV positions so that the peak point of the image lies on the origin
- Click ok to complete (^) Sketch.
(1 inch Line)
Preparation
System origin (0,0,0)
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Tutorial 4A
To create a sketch:-
- Click “Sketch” icon and select “yz” plane
- Draw a horizontal line as shown
- (Length ~ 200mm, Location ~100mm under origin)
- (Before clicking the 2nd^ point of the line, refer to the L value on the toolbar “Sketch Tools” )
- Click Exit to complete
To create an Extrude Surface:-
- Click “Extrude” icon
- Select “Sketch.3” as profile, “yz plane” as direction
- Click “Reverse Direction”
- Keep the Dimensions UNCHANGED (which should be the same as Extrude.1)
- Click ok to complete
Right view (sketch.1)
Draw a line
New Extrude surface
Preparation
~200mm
~100mm
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Tutorial 4A
To apply a Texture material onto the surface:-
- Click “Apply Material” icon
- Select a Texture material, e.g. “B&W Tiling” on the list
- Click on the Extrude.2 surface
- Click ok to complete
To replace the texture by a picture:-
- Double-click “B&W Tiling” on the tree
- Select the tab page “Rendering”
- Click on the sub-tab page “Texture”
- Select “Image” as type
- Click “…” icon to select a picture file
- Select the file “ p51-top.jpg ” in your project folder
- Click “Open”
- (The projection method is correct to show the picture on the surface, so we needn‟t change it)
- Deselect U,V repeat
Preparation
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Tutorial 4A
To create a sketch:-
- Click “Sketch” icon and select “zx” plane
- Draw a vertical line as shown
- Draw two horizontal axes as reference, then adjust the vertical line so that the two axes touch the maximum & the minimum points respectively
- Click Exit to complete
To Create an Extrude Surface:-
- Click “Extrude” icon
- Select “Sketch.4” as profile, “zx plane” as direction
- Click “Reverse Direction”
- Drag “Limit.2” so that the extrusion lengths in both directions are nearly the same
- Click ok to complete
Draw a line
Drag “Limit2”
New extrude surface
Preparation
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Tutorial 4A
To Apply a Texture material onto the surface:-
- Click “Apply Material” icon
- Select a Texture material, e.g. “B&W Tiling” on the list
- Click on the Extrude.3 surface
- Click ok to complete
To replace the texture by a picture:-
- Double-click “B&W Tiling” on the tree
- Select the tab page “Rendering”
- Click on the sub-tab page “Texture”
- Select “Image” as type
- Click “…” icon to select a picture file
- Select the file “ p51-front.jpg ” in your project folder
- Click “Open”
- (Now, the projection method is not correct to show the picture on the surface)
- Select “Cubical Mapping”
- Deselect U,V repeat
Preparation
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Tutorial 4A
- (Now, all three views are aligned)
- Modify Sketch1, Extrude1 to adjust Right View
- Modify Sketch3, Extrude2 to adjust Top View
- Modify Sketch4, Extrude3 to adjust Front View
- (Remark: The three surfaces are just the projection screens. No matter how we change their positions or sizes, the three views are still aligned)
Right View (Sketch1)
Front View (Sketch4)
Top View (Sketch3)
Right View (Sketch1)
Front View (Sketch4)
Top View (Sketch3)
Preparation
Move the surface to left
Move the surface downward
result (^) result
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Tutorial 4A
Hide Sketch1, Sketch3 & Sketch
To make a geometrical set UnPickable:-
- Right-Click “Reference” on tree
- Select “Properties”
- Deselect “Pickable” and click ok to complete
- (Now all elements in “Reference” cannot be picked by the mouse)
To Create a Geometrical Set:-
- Select “Insert/ Geometrical Set” on the menu bar
- Click ok to complete
Modeling
Right-click
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Tutorial 4A
To Create Reference Planes (Cont‟):-
- Click “Plane” icon
- Select “zx plane”
- Click “Top View” icon (or click “z” on compass)
- Move the mouse cursor onto “Move” (green color) and then drag it near “section 1” of the image
- Move the mouse cursor onto “Offset” (green color) and then drag it onto “section 1” of the image
- (Offset value ~ 14mm)
- Click ok to complete
- Click “Plane” icon again
- Select “plane6” (the previous plane at section1)
- Enter 25mm as offset value (or drag “Offset”)
- Click ok to complete
- Click “Plane” icon again
- Select “plane6” (the previous plane at section1)
- Enter 125mm as offset value (or drag “Offset”)
- Click ok to complete
Modeling Drag “Move” to move the plane (Offset value will NOT be changed)
“Move” the plane near Section
plane plane
plane
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Tutorial 4A
(Cont‟):-
- Double Click Plane.
- Click “Reverse Direction” icon
- Click ok to confirm
- Double Click Plane.
- Click “Reverse Direction” icon
- Click ok to confirm
- Double Click Plane.
- Click “Reverse Direction” icon
- Click ok to confirm
- (We are going to build the model on the Right- Hand Side, therefore we flip these 3 offset planes onto that side)
Modeling
